WO2015194630A1 - Transfer material, method for manufacturing liquid crystal panel, and method for manufacturing liquid crystal display device - Google Patents

Abstract

An aspect of the present invention is a transfer material having a wavelength conversion member and a barrier member (B), in the stated order, on a barrier member (A) which is a provisional support body, the wavelength conversion member having a wavelength conversion layer containing quantum dots which are excited by an excitation light to emit fluorescent light. The present invention pertains to a method for manufacturing a liquid crystal panel equipped with the wavelength conversion member, and a method for manufacturing a liquid crystal display device.

Description

Transfer material, method for manufacturing liquid crystal panel, and method for manufacturing liquid crystal display device

The present invention relates to a transfer material, and more particularly to a transfer material that can be used for manufacturing a liquid crystal panel and a liquid crystal display device.
Furthermore, the present invention relates to a liquid crystal panel using the transfer material and a method for manufacturing a liquid crystal display device.

Flat panel displays such as liquid crystal display devices (hereinafter also referred to as LCD (Liquid Crystal Display)) consume less power and are increasingly used as space-saving image display devices year by year. The liquid crystal display device is composed of at least a backlight and a liquid crystal cell, and usually further includes members such as a backlight side polarizing plate and a viewing side polarizing plate.

In the flat panel display market, color reproducibility is improving as LCD performance improvement. In this regard, in recent years, quantum dots (also referred to as Quantum Dot, QD, and quantum dots) have attracted attention as light emitting materials (see Patent Document 1). For example, when excitation light enters a layer including quantum dots from a backlight, the quantum dots are excited and emit fluorescence (wavelength conversion) having a wavelength different from that of the excitation light. Here, by using quantum dots having different emission characteristics, red light, green light, and blue light can be emitted from the wavelength conversion member to realize white light. Since the fluorescence due to the quantum dots has a small half-value width, the white light obtained has high brightness and excellent color reproducibility. With the progress of the three-wavelength light source technology using such quantum dots, the color gamut has been expanded from 72% to 100% in NTSC (National Television System) ratio.

US2012 / 0113672A1

As described above, quantum dots are useful materials that can improve LCD performance by improving color reproducibility.
On the other hand, in the market for small and medium-sized LCDs such as tablet PCs (Personal Computers) and mobile applications, which are rapidly spreading in recent years, there is a high demand for thinning. This trend of thinning extends to the large LCD market centering on TV. Under such circumstances, it has been studied to reduce the thickness of the LCD by various means such as reducing the thickness of the glass or film constituting the LCD or reducing the thickness by integrating the functions of members.

Therefore, an object of the present invention is to provide a new means for enabling a liquid crystal display device including a quantum dot as a light emitting material to be thinned.

Quantum dots have a problem that when they come into contact with oxygen, the light emission intensity decreases due to a photo-oxidation reaction (low light resistance). In this regard, Patent Document 1 proposes laminating a barrier member (barrier layer) on a film containing quantum dots in order to protect the quantum dots from oxygen and the like. This barrier member is provided on both surfaces of a wavelength conversion member having a layer containing quantum dots (hereinafter also referred to as “wavelength conversion layer”) in order to more effectively protect the quantum dots from oxygen or the like. preferable.
The present inventors made extensive studies to achieve the above-mentioned object while paying attention to this point. As a result, a transfer material in which both surfaces of the wavelength conversion member are protected by the barrier member by providing a barrier member on both surfaces of the wavelength conversion member and making the barrier member on one side peelable (a temporary support). Thus, by using this transfer material, a liquid crystal display device can be manufactured by peeling the temporary support from the transfer material and attaching it to the transfer object. I came to find the right means. According to this means, the wavelength conversion member (more specifically, the quantum dots included in the wavelength conversion layer of the wavelength conversion member) is protected by the barrier member on both sides until transferred to the transfer object, and transferred to the liquid crystal. After being assembled in the display device, the barrier member on one side is removed, so that it is thinned. The surface from which the barrier member has been removed is protected by the transfer object, and the quantum dots can be prevented from being deteriorated by oxygen or the like.
Note that, as a means for achieving thinning of the liquid crystal display device described above, it is conceivable to thin the layer containing the quantum dots (wavelength conversion layer). However, thinning a layer containing quantum dots that are light emitting materials can cause a decrease in emission intensity and a decrease in luminance of the liquid crystal display device. On the other hand, according to the transfer material, it is possible to achieve a thin liquid crystal display device without relying on a thin wavelength conversion layer.
The present invention has been completed based on the above findings.

One embodiment of the present invention provides:
On the barrier member A which is a temporary support,
A wavelength conversion member having a wavelength conversion layer including a quantum dot that is excited by excitation light and emits fluorescence;
Barrier member B;
Transfer materials having in this order,
About.

In one aspect, the transfer material is a transfer material for manufacturing a liquid crystal panel.

In one aspect, the barrier member A side outermost surface of the wavelength conversion member is an easily peelable surface.

In one aspect, the wavelength conversion member has a particle uneven distribution region in which particles having a particle size of 100 nm or more are unevenly distributed in the barrier member A side surface layer region, and the easy separation surface is a surface of the particle uneven distribution region.

In one embodiment, the wavelength conversion member has a particle uneven distribution region in which particles having a particle size of 500 nm or more are unevenly distributed in the barrier member A side surface layer region, and the easily peelable surface is a surface of the particle uneven distribution region.

In one embodiment, the barrier member A has a wavelength conversion member side outermost surface that is an easily peelable surface.

In one aspect, the wavelength conversion member side outermost layer of the barrier member A is a particle-containing layer, and the particle-containing layer surface is the above-described easily peelable surface.

In one embodiment, the barrier member A has an inorganic layer on the wavelength conversion member side outermost layer.

In one aspect, the barrier member A has an easy adhesion layer. The easy adhesion layer can be included in the barrier member A as a layer other than the wavelength conversion member side outermost surface, for example. The wavelength conversion member side outermost layer is, for example, a base material constituting the barrier member A, or an inorganic layer or an organic layer.

In one aspect, the barrier member B has an easy adhesion layer as the outermost layer on the wavelength conversion member side.

In one embodiment, the barrier member A and the barrier member B each include at least one layer selected from the group consisting of an inorganic layer and an organic layer.

A further aspect of the invention provides:
Peeling the barrier member A of the transfer material, and
Bonding the exposed surface exposed by peeling with the liquid crystal panel surface including at least the liquid crystal cell;
A method for producing a liquid crystal panel with a wavelength conversion member,
About.

In one aspect, the exposed surface is bonded to the backlight side surface of the liquid crystal panel.

In one aspect, the liquid crystal panel includes a viewing side polarizing plate and a backlight side polarizing plate with a liquid crystal cell interposed therebetween.

A further aspect of the invention provides:
By the above method, producing a liquid crystal panel with a wavelength conversion member, and
Assembling a liquid crystal display device by combining the manufactured liquid crystal panel and the backlight unit,
A method for manufacturing a liquid crystal display device,
About.

According to one embodiment of the present invention, there are provided a transfer material that can be suitably used for manufacturing a liquid crystal panel having a wavelength conversion member and a liquid crystal display device, and a method for manufacturing a liquid crystal panel and a liquid crystal display device using the transfer material. be able to. According to one embodiment of the present invention, it is possible to achieve both protection of quantum dots and thinning of a liquid crystal display device.

It is a schematic block diagram of an example of the transfer material manufacturing apparatus. It is the elements on larger scale of the manufacturing apparatus shown in FIG. The layer configuration and evaluation results of the examples are shown (transfer material 103, liquid crystal display device 203). The layer configuration and evaluation results of the examples are shown (transfer material 104, liquid crystal display device 204). The layer configuration and evaluation results of the examples are shown (transfer material 105, liquid crystal display device 205). The layer configuration and evaluation results of the examples are shown (transfer material 106, liquid crystal display device 206). The layer configuration and evaluation results of the examples are shown (transfer material 107, liquid crystal display device 207). The layer configuration and evaluation results of the examples are shown (transfer material 108, liquid crystal display device 208). The layer structure and evaluation result of a comparative example are shown (non-transfer material 101, liquid crystal display device 201). The layer structure and evaluation results of a comparative example are shown (transfer material 102, liquid crystal display device 202).

[Transfer material]
The transfer material according to one embodiment of the present invention includes a wavelength conversion member having a wavelength conversion layer including quantum dots that are excited by excitation light and emit fluorescence on a barrier member A that is a temporary support, and a barrier member B. In this order. The temporary support means a support that is peeled off before transferring the transfer material to the transfer object. The temporary support (barrier member A) can protect the quantum dots contained in the wavelength conversion layer of the wavelength conversion member together with the barrier member B until transfer. As described above, the quantum dots can be protected by the transfer object and the barrier member B after the transfer. As described above, since the transfer product obtained by the transfer does not include the barrier member A, the liquid crystal display device can be thinned without relying on the thinning of the wavelength conversion layer. Quantum dots can be protected. In the following, the transfer material from which the temporary support has been removed is also referred to as “transfer product”.
Hereinafter, the transfer material will be described in more detail.

The following description may be made based on representative embodiments of the present invention, but the present invention is not limited to such embodiments. In the present invention and the present specification, a numerical range expressed using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value.
Further, in the present invention and the present specification, the “half-value width” of a peak refers to the width of the peak at a peak height of ½. Further, light having an emission center wavelength in a wavelength band of 400 to 500 nm, preferably 430 to 480 nm is called blue light, and light having an emission center wavelength in a wavelength band of 500 to 600 nm is called green light. Light having an emission center wavelength in the wavelength band of ˜680 nm is called red light.
In the present invention and the present specification, the “polymerizable composition” is a composition containing at least one polymerizable compound and has a property of being cured by being subjected to a polymerization treatment such as light irradiation and heating. The “polymerizable compound” is a compound containing one or more polymerizable groups in one molecule. A polymerizable group is a group that can participate in a polymerization reaction. The details will be described later.

Wavelength conversion member (wavelength conversion layer)
The transfer material has at least a wavelength conversion member including a wavelength conversion layer including quantum dots that are excited by excitation light and emit fluorescence. The wavelength conversion layer includes at least one kind of quantum dot and can also include two or more kinds of quantum dots having different light emission characteristics. The known quantum dots include a quantum dot A having an emission center wavelength in the wavelength band of 600 nm to 680 nm, a quantum dot B having an emission center wavelength in the wavelength band of 500 nm to 600 nm, and a wavelength band of 400 nm to 500 nm. There is a quantum dot C having an emission center wavelength. The quantum dot A is excited by excitation light to emit red light, the quantum dot B emits green light, and the quantum dot C emits blue light. For example, when blue light is incident as excitation light on a wavelength conversion layer including quantum dots A and B, red light emitted from quantum dots A, green light emitted from quantum dots B, and wavelength conversion layers White light can be realized by the transmitted blue light. Alternatively, by making ultraviolet light as excitation light incident on a wavelength conversion layer including quantum dots A, B, and C, red light emitted by quantum dots A, green light emitted by quantum dots B, and quantum dots White light can be realized by blue light emitted by C. The ultraviolet light means light having a wavelength of 280 to 400 nm, preferably light having a wavelength of 280 to 380 nm.

The wavelength conversion layer can contain quantum dots in the organic matrix. The organic matrix is usually a polymer obtained by polymerizing a polymerizable composition containing quantum dots (quantum dot-containing polymerizable composition) by light irradiation or heating, or a combination of light irradiation and heating (regardless of order). It is a coalescence. The shape of the wavelength conversion layer is not particularly limited, and may be any shape such as a sheet shape, a film shape, and a bar shape. As for the quantum dots, for example, JP 2012-169271 A paragraphs 0060 to 0066 can be referred to, but the quantum dots are not limited thereto. As the quantum dots, commercially available products can be used without any limitation. The emission wavelength of the quantum dots can usually be adjusted by the composition and size of the particles, and the composition and size.

The wavelength conversion layer can be preferably produced by a coating method. Specifically, a quantum dot-containing polymerizable composition is applied onto a substrate and then subjected to curing treatment by light irradiation or heating, or a combination of light irradiation and heating (regardless of order). A conversion layer can be obtained.

The polymerizable compound used for producing the quantum dot polymerizable composition is not particularly limited. The content of the total polymerizable compound in the total amount of the quantum dot polymerizable composition is preferably about 10 to 99.99% by mass.

From the viewpoint of transparency and adhesion of the cured film after curing, a (meth) acrylate compound such as a monofunctional or polyfunctional (meth) acrylate monomer, a polymer thereof, a prepolymer, and the like are preferable. In the following, a polymerizable composition containing, together with quantum dots, one or more selected from the group consisting of (meth) acrylate compounds such as monofunctional or polyfunctional (meth) acrylate monomers, polymers thereof, and prepolymers, ) An acrylate-based polymerizable composition. In addition, in this invention and this specification, description with "(meth) acrylate" shall be used by the meaning of at least one of an acrylate and a methacrylate, or either. The same applies to “(meth) acryloyl” and the like.

Monofunctional (meth) acrylate monomers include acrylic acid and methacrylic acid, derivatives thereof, and more specifically, monomers having one polymerizable unsaturated bond ((meth) acryloyl group) of (meth) acrylic acid in the molecule Can be mentioned. Specific examples thereof include the following compounds, but the present invention is not limited thereto.
Methyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isononyl (meth) acrylate, n-octyl (meth) acrylate, lauryl (meth) acrylate, stearyl ( Alkyl (meth) acrylates having an alkyl group such as meth) acrylate having 1 to 30 carbon atoms; aralkyl (meth) acrylates having an aralkyl group such as benzyl (meth) acrylate having 7 to 20 carbon atoms; butoxyethyl (meth) ) An alkoxyalkyl (meth) acrylate having an alkoxyalkyl group such as acrylate having 2 to 30 carbon atoms; a total number of carbon atoms of a (monoalkyl or dialkyl) aminoalkyl group such as N, N-dimethylaminoethyl (meth) acrylate; 1-20 Aminoalkyl (meth) acrylates; (meth) acrylates of diethylene glycol ethyl ether, (meth) acrylates of triethylene glycol butyl ether, (meth) acrylates of tetraethylene glycol monomethyl ether, (meth) acrylates of hexaethylene glycol monomethyl ether, octa Monomethyl ether (meth) acrylate of ethylene glycol, monomethyl ether (meth) acrylate of nonaethylene glycol, monomethyl ether (meth) acrylate of dipropylene glycol, monomethyl ether (meth) acrylate of heptapropylene glycol, monoethyl ether of tetraethylene glycol Alkylene chain such as (meth) acrylate has 1 to 10 carbon atoms and terminal alkyl (Meth) acrylate of polyalkylene glycol alkyl ether having 1 to 10 carbon atoms; (meth) acrylate of hexaethylene glycol phenyl ether or the like having 1 to 30 carbon atoms in the alkylene chain and 6 carbon atoms in the terminal aryl ether (Meth) acrylate of -20 polyalkylene glycol aryl ethers; cycloaliphatic structures such as cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, isobornyl (meth) acrylate, and methylene oxide-added cyclodecatriene (meth) acrylate (Meth) acrylate having a total carbon number of 4 to 30; fluorinated alkyl (meth) acrylate having a total carbon number of 4 to 30 such as heptadecafluorodecyl (meth) acrylate; 2-hydroxyethyl (meth) acrylate, 3 -Hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, triethylene glycol mono (meth) acrylate, tetraethylene glycol mono (meth) acrylate, hexaethylene glycol mono (meth) acrylate, octapropylene glycol mono ( (Meth) acrylate, (meth) acrylate having a hydroxyl group such as glycerol mono- or di (meth) acrylate; (meth) acrylate having a glycidyl group such as glycidyl (meth) acrylate; tetraethylene glycol mono (meth) acrylate, hexaethylene Polyethylene glycol mono (meth) having 1 to 30 carbon atoms in the alkylene chain such as glycol mono (meth) acrylate and octapropylene glycol mono (meth) acrylate Acrylate; (meth) acrylamide, N, N- dimethyl (meth) acrylamide, N- isopropyl (meth) acrylamide, 2-hydroxyethyl (meth) acrylamide, acryloyl morpholine (meth) acrylamide and the like.

As the monofunctional (meth) acrylate monomer, an alkyl (meth) acrylate having 4 to 30 carbon atoms is preferably used, and an alkyl (meth) acrylate having 12 to 22 carbon atoms is used to improve the dispersibility of the quantum dots. From the viewpoint of, it is more preferable. As the dispersibility of the quantum dots improves, the amount of light that goes straight from the wavelength conversion layer to the exit surface increases, which is effective in improving front luminance and front contrast. Specifically, monofunctional (meth) acrylate monomers include butyl (meth) acrylate, octyl (meth) acrylate, lauryl (meth) acrylate, oleyl (meth) acrylate, stearyl (meth) acrylate, and behenyl (meth) acrylate. Butyl (meth) acrylamide, octyl (meth) acrylamide, lauryl (meth) acrylamide, oleyl (meth) acrylamide, stearyl (meth) acrylamide, behenyl (meth) acrylamide and the like are preferable. Of these, lauryl (meth) acrylate, oleyl (meth) acrylate, and stearyl (meth) acrylate are particularly preferable.

Polyfunctional (meth) acrylate monomer having two or more (meth) acryloyl groups in the molecule together with a monomer having one polymerizable unsaturated bond ((meth) acryloyl group) in one molecule. Can also be used together. Specific examples include the following compounds, but the present invention is not limited thereto.
1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, etc., alkylene glycol di having 1 to 20 carbon atoms in the alkylene chain (Meth) acrylates; polyalkylene glycol di (meth) acrylates having an alkylene chain of 1 to 20 carbon atoms such as polyethylene glycol di (meth) acrylate and polypropylene glycol di (meth) acrylate; trimethylolpropane tri (meth) acrylate, Tri (meth) acrylate having a total carbon number of 10 to 60 such as ethylene oxide-added trimethylolpropane tri (meth) acrylate; ethylene oxide-added pentaerythritol tetra (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol Tetra (meth) total carbon number of 10 to 100 tetra (meth) acrylates such as acrylate; dipentaerythritol hexa (meth) acrylate.

The amount of the polyfunctional (meth) acrylate monomer used is preferably 5 parts by mass or more from the viewpoint of coating film strength with respect to 100 parts by mass of the total amount of polymerizable compounds contained in the quantum dot polymerizable composition. From the viewpoint of suppressing the gelation of the composition, it is preferably 95 parts by mass or less. From the same viewpoint, the amount of the monofunctional (meth) acrylate monomer used is 5 parts by mass or more and 95 parts by mass or less with respect to 100 parts by mass of the total amount of the polymerizable compounds contained in the quantum dot polymerizable composition. It is preferable to do.

Preferred examples of the polymerizable compound also include compounds having a cyclic group such as an epoxy group or a ring-opening polymerizable cyclic ether group such as an oxetanyl group. More preferable examples of such a compound include compounds having an epoxy group-containing compound (epoxy compound). Regarding the epoxy compound, reference can be made to paragraphs 0029 to 0033 of JP2011-159924A.

The above quantum dot polymerizable composition can contain a known radical polymerization initiator or cationic polymerization initiator as a polymerization initiator. As for the polymerization initiator, reference can be made to, for example, paragraphs 0037 and 0042 of JP2013-043382A and paragraphs 0040 to 0042 of JP2011-159924A. The polymerization initiator is preferably 0.1 mol% or more, more preferably 0.5 to 5 mol% of the total amount of the polymerizable compound contained in the polymerizable composition.

Quantum dots may be added to the polymerizable composition in the form of particles, or may be added in the form of a dispersion dispersed in a solvent. The addition in the state of a dispersion is preferable from the viewpoint of suppressing the aggregation of the quantum dot particles. The solvent used here is not particularly limited. The quantum dots can be added in an amount of, for example, about 0.1 to 10 parts by mass with respect to 100 parts by mass of the total amount of the composition used for forming the wavelength conversion layer.

The wavelength conversion layer is coated with a quantum dot polymerizable composition containing the above-described components and a known additive that can be optionally added, for example, on the surface of the barrier member to remove the solvent, and then irradiated with light. It can be formed by polymerizing and curing by, for example. Application methods include curtain coating, dip coating, spin coating, print coating, spray coating, slot coating, roll coating, slide coating, blade coating, gravure coating, wire bar method, etc. A well-known coating method is mentioned. The curing conditions can be appropriately set according to the type of polymerizable compound used and the composition of the polymerizable composition. Moreover, you may add a solvent as needed for the viscosity etc. of a composition. In this case, the type and amount of the solvent used are not particularly limited. For example, one or a mixture of two or more organic solvents can be used as the solvent.
The total thickness of the wavelength conversion layer is preferably 1 μm or more, more preferably 50 μm or more, and still more preferably 80 μm or more. From the viewpoint of achieving luminance enhancement by obtaining high intensity light emission from the wavelength conversion layer, it is preferable that the wavelength conversion layer contains more quantum dots, which are light emitting materials, in order to increase the thickness of the wavelength conversion layer. In this regard, as described above, according to the above transfer material, it is possible to reduce the thickness of an article incorporating the wavelength conversion member, without reducing the thickness of the wavelength conversion layer. On the other hand, the total thickness of the wavelength conversion layer is preferably 500 μm or less, more preferably 400 μm or less. Further, the wavelength conversion layer may have a laminated structure of two or more layers, and includes a wavelength conversion layer including quantum dots having different emission characteristics (different emission center wavelengths) in the same layer. Also good. When the wavelength conversion layer has a plurality of layers, the thickness of one layer is preferably in the range of 1 to 300 μm, more preferably in the range of 10 to 250 μm, and still more preferably in the range of 30 to 150 μm.

The curing of the quantum dot-containing polymerizable composition may be performed in a state where the quantum dot-containing polymerizable composition is sandwiched between the barrier member A and the barrier member B. One aspect of the production process of the transfer material including such curing treatment will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

FIG. 1 is a schematic configuration diagram of an example of a wavelength conversion member manufacturing apparatus, and FIG. 2 is a partial enlarged view of the manufacturing apparatus shown in FIG. The manufacturing process of the wavelength conversion member using the manufacturing apparatus shown in FIGS. 1 and 2 includes a quantum dot-containing polymerizable composition on the surface of a first substrate (hereinafter referred to as “first film”) that is continuously conveyed. The step of applying and forming a coating film, and laminating (overlapping) a second substrate (hereinafter also referred to as “second film”) continuously conveyed on the coating film, the first film A step of sandwiching the coating film between the first film and the second film, and a state where the coating film is sandwiched between the first film and the second film, and either the first film or the second film is a backup roller And irradiating with light while continuously transporting, polymerizing and curing the coating film to form a wavelength conversion layer (cured layer). By using barrier members A and B as the first film and the second film, a transfer material having a wavelength conversion member between barrier member A and barrier member B can be obtained. Any one of the first film and the second film may be the barrier film A and the other may be the barrier film B, and it does not matter which is the barrier film A or B.

More specifically, first, the first film 10 is continuously conveyed from the unillustrated transmitter to the coating unit 20. For example, the first film 10 is delivered from the delivery machine at a conveyance speed of 1 to 50 m / min. However, it is not limited to this conveyance speed. When delivered, for example, a tension of 20 to 150 N / m, preferably a tension of 30 to 100 N / m is applied to the first film 10.

In the application unit 20, a quantum dot-containing polymerizable composition (hereinafter also referred to as “application liquid”) is applied to the surface of the first film 10 that is continuously conveyed, and a coating film 22 (see FIG. 2) is formed. Is done. In the coating unit 20, for example, a die coater 24 and a backup roller 26 disposed to face the die coater 24 are installed. The surface opposite to the surface on which the coating film 22 of the first film 10 is formed is wound around the backup roller 26, and the coating liquid is applied from the discharge port of the die coater 24 onto the surface of the first film 10 that is continuously conveyed. As a result, the coating film 22 is formed. Here, the coating film 22 refers to a quantum dot-containing polymerizable composition before being applied on the first film 10.

In the present embodiment, the die coater 24 to which the extrusion coating method is applied is shown as the coating apparatus, but the present invention is not limited to this. For example, a coating apparatus to which various methods such as a curtain coating method, an extrusion coating method, a rod coating method, or a roll coating method are applied can be used.

The first film 10 having passed through the coating unit 20 and having the coating film 22 formed thereon is continuously conveyed to the laminating unit 30. In the laminating unit 30, the second film 50 that is continuously conveyed is laminated on the coating film 22, and the coating film 22 is sandwiched between the first film 10 and the second film 50. In addition, when a quantum dot containing polymeric composition contains a solvent, you may provide the drying zone which is not illustrated in the arbitrary positions before the laminate part 30 for solvent removal. The drying treatment in the drying zone can be performed by a known method such as passing through a heated atmosphere or blowing dry air.

The laminating unit 30 is provided with a laminating roller 32 and a heating chamber 34 surrounding the laminating roller 32. The heating chamber 34 is provided with an opening 36 for allowing the first film 10 to pass therethrough and an opening 38 for allowing the second film 50 to pass therethrough.

A backup roller 62 is disposed at a position facing the laminating roller 32. The first film 10 on which the coating film 22 is formed is wound around the backup roller 62 on the surface opposite to the surface on which the coating film 22 is formed, and is continuously conveyed to the laminating position P. The laminating position P means a position where the contact between the second film 50 and the coating film 22 starts. The first film 10 is preferably wound around the backup roller 62 before reaching the laminating position P. This is because even if wrinkles occur in the first film 10, the wrinkles are corrected and removed by the backup roller 62 before reaching the laminate position P. Therefore, the position (contact position) where the first film 10 is wound around the backup roller 62 and the distance L1 to the lamination position P are preferably long, for example, 30 mm or more is preferable, and the upper limit is usually It is determined by the diameter of the backup roller 62 and the pass line.

In the present embodiment, the second film 50 is laminated by the backup roller 62 and the laminating roller 32 used in the curing unit 60. That is, the backup roller 62 used in the curing unit 60 is also used as a roller used in the laminating unit 30. However, the present invention is not limited to the above form, and a laminating roller may be installed in the laminating unit 30 in addition to the backup roller 62 so that the backup roller 62 is not used.

By using the backup roller 62 used in the curing unit 60 in the laminating unit 30, the number of rollers can be reduced. The backup roller 62 can also be used as a heat roller for the first film 10.

The second film 50 sent from a sending machine (not shown) is wound around the laminating roller 32 and continuously conveyed between the laminating roller 32 and the backup roller 62. The second film 50 is laminated on the coating film 22 formed on the first film 10 at the laminating position P. Accordingly, the coating film 22 is sandwiched between the first film 10 and the second film 50. Lamination refers to laminating the second film 50 on the coating film 22.

The distance L2 between the laminating roller 32 and the backup roller 62 is the total thickness of the first film 10, the wavelength conversion layer (cured layer) 28 obtained by polymerizing and curing the coating film 22, and the second film 50. It is preferable that it is more than a value. Moreover, it is preferable that L2 is below the length which added 5 mm to the total thickness of the 1st film 10, the coating film 22, and the 2nd film 50. FIG. By setting the distance L2 to be equal to or less than the total thickness plus 5 mm, it is possible to prevent bubbles from entering between the second film 50 and the coating film 22. Here, the distance L <b> 2 between the laminating roller 32 and the backup roller 62 refers to the shortest distance between the outer peripheral surface of the laminating roller 32 and the outer peripheral surface of the backup roller 62.

Rotational accuracy of the laminating roller 32 and the backup roller 62 is 0.05 mm or less, preferably 0.01 mm or less in radial runout. The smaller the radial runout, the smaller the thickness distribution of the coating film 22.

Further, in order to suppress thermal deformation after the coating film 22 is sandwiched between the first film 10 and the second film 50, the difference between the temperature of the backup roller 62 of the curing unit 60 and the temperature of the first film 10. The difference between the temperature of the backup roller 62 and the temperature of the second film 50 is preferably 30 ° C. or less, more preferably 15 ° C. or less, and most preferably the same.

In order to reduce the difference from the temperature of the backup roller 62, when the heating chamber 34 is provided, it is preferable to heat the first film 10 and the second film 50 in the heating chamber 34. For example, hot air is supplied to the heating chamber 34 by a hot air generator (not shown), and the first film 10 and the second film 50 can be heated.

The first film 10 may be heated by the backup roller 62 by being wound around the backup roller 62 whose temperature has been adjusted.

On the other hand, the second film 50 can be heated by the laminating roller 32 by using the laminating roller 32 as a heat roller.
However, the heating chamber 34 and the heat roller are not essential and can be provided as necessary.

Next, the film 22 is continuously conveyed to the curing unit 60 in a state where the coating film 22 is sandwiched between the first film 10 and the second film 50. In the embodiment shown in the drawing, curing in the curing unit 60 is performed by light irradiation. However, when the polymerizable compound contained in the quantum dot-containing polymerizable composition is polymerized by heating, such as spraying warm air. Curing can be performed by heating.

A light irradiation device 64 is provided at a position facing the backup roller 62 and the backup roller 62. The first film 10 and the second film 50 sandwiching the coating film 22 are continuously conveyed between the backup roller 62 and the light irradiation device 64. What is necessary is just to determine the light irradiated by a light irradiation apparatus according to the kind of photopolymerizable compound contained in a quantum dot containing polymeric composition, and an ultraviolet-ray is mentioned as an example. Here, the ultraviolet light means light having a wavelength of 280 to 400 nm. As a light source that generates ultraviolet rays, for example, a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, an ultrahigh-pressure mercury lamp, a carbon arc lamp, a metal halide lamp, a xenon lamp, or the like can be used. The light irradiation amount may be set within a range in which the polymerization and curing of the coating film can proceed. For example, the coating film 22 can be irradiated with ultraviolet rays having an irradiation amount of 100 to 10,000 mJ / cm ² .

In the curing unit 60, the first film 10 is wound around the backup roller 62 in a state where the coating film 22 is sandwiched between the first film 10 and the second film 50, and is continuously transported from the light irradiation device 64. The wavelength conversion layer (cured layer) 28 can be formed by performing light irradiation to cure the coating film 22.

In the present embodiment, the first film 10 side is wound around the backup roller 62 and continuously conveyed, but the second film 50 may be wound around the backup roller 62 and continuously conveyed.

“Wrapping around the backup roller 62” means a state in which one of the first film 10 and the second film 50 is in contact with the surface of the backup roller 62 at a certain wrap angle. Accordingly, the first film 10 and the second film 50 move in synchronization with the rotation of the backup roller 62 while being continuously conveyed. Winding around the backup roller 62 may be at least during the irradiation of ultraviolet rays.

The backup roller 62 includes a cylindrical main body and rotating shafts arranged at both ends of the main body. The main body of the backup roller 62 has a diameter of φ200 to 1000 mm, for example. There is no restriction on the diameter φ of the backup roller 62. In consideration of curl deformation of the laminated film, equipment cost, and rotational accuracy, the diameter is preferably 300 to 500 mm. The temperature of the backup roller 62 can be adjusted by attaching a temperature controller to the main body of the backup roller 62.

The temperature of the backup roller 62 takes into consideration the heat generation during light irradiation, the curing efficiency of the coating film 22, and the occurrence of wrinkle deformation on the backup roller 62 of the first film 10 and the second film 50. Can be determined. The backup roller 62 is preferably set to a temperature range of 10 to 95 ° C., for example, and more preferably 15 to 85 ° C. Here, the temperature related to the roller refers to the surface temperature of the roller.

The distance L3 between the laminate position P and the light irradiation device 64 can be set to 30 mm or more, for example.

The coating film 22 becomes the cured layer 28 by light irradiation, and the wavelength conversion member 70 including the first film 10, the cured layer 28, and the second film 50 is manufactured. The wavelength conversion member 70 is peeled from the backup roller 62 by the peeling roller 80. The wavelength conversion member 70 is continuously conveyed to a winder (not shown), and then the wavelength conversion member 70 is wound into a roll by the winder.

As mentioned above, although one aspect of the production process of the transfer material has been described, the present invention is not limited to the above aspect. For example, the quantum dot-containing polymerizable composition is applied to one of the barrier members A and B, and the other barrier member is not laminated on the barrier member A and B, but is cured after a drying treatment as necessary. Thus, a wavelength conversion member (wavelength conversion layer) may be formed. One or more other layers such as an inorganic layer may be laminated on the formed wavelength conversion layer by a known method.

(Means for easy peeling)
The wavelength conversion member has a barrier member B on one surface and a temporary support (barrier member A) on the other surface. Since the temporary support is peeled and removed when the transfer material is transferred (bonded) to the transfer object, the interface between the temporary support and the wavelength conversion member is preferably easily peelable. . In the present invention and the present specification, easily peelable means that the magnitude of the force when pulling up the temporary support in the direction perpendicular to the surface of the wavelength conversion member is 90 ° peel adhesive strength described in JIS Z 0237 It is said that it is 0.2N / 10mm or less. For this reason, in one aspect, the wavelength conversion member side outermost layer of the temporary support (barrier member A) can be a layer other than the easy-adhesion layer described later. As such a layer, the inorganic layer mentioned later can be mentioned in one mode. The inorganic layer is generally a wavelength conversion member (in particular, a wavelength conversion layer containing quantum dots in an organic matrix, particularly a wavelength conversion layer that is a cured layer formed by curing a quantum dot-containing (meth) acrylate-based polymerizable composition). ) Tend to be low. Therefore, by making the wavelength conversion member side outermost layer of the temporary support (barrier member A) an inorganic layer, the interface between the temporary support (barrier member A) and the wavelength conversion member can be easily peeled off. be able to. Moreover, in another one aspect | mode, the temporary support body (barrier member A) side outermost surface of a wavelength conversion member can be made into an easily peelable surface. In still another embodiment, the wavelength conversion member side outermost surface of the temporary support (barrier member A) can be an easily peelable surface.

The easy peeling surface refers to a surface that has been subjected to a treatment for facilitating peeling, and a preferable easy peeling surface forming method includes a method in which particles are unevenly distributed on the surface layer region of the wavelength conversion member or temporary support. Can do.

For this reason, in one aspect, the particle-containing layer as a surface layer on the temporary support (barrier member A) side of the wavelength conversion member, as a surface layer on the wavelength conversion member side of the temporary support (barrier member A), or as both of these surface layers Is provided. The particle-containing layer has a surface property that is changed by the presence of particles on the surface of the layer, and can function as an easily peelable surface.
In another embodiment, for example, at the time of forming the wavelength conversion layer, by using two or more kinds of coating liquids having different particle contents, the particles are unevenly distributed in the thickness direction of the layer due to gravity, and the particle content is only on one side. Different regions can be formed. For example, after the first region is formed with a coating solution that does not contain particles, the second region is formed by applying the particle-containing coating solution on this region, thereby converting the wavelength having the unevenly distributed region (second region). A layer can be formed. By providing such a particle uneven distribution region, the surface of the wavelength conversion member can function as an easily peelable surface.

The particle uneven distribution region can be specified by observing the cross section of the wavelength conversion member with an electron microscope and counting the number of particles in the thickness direction. Alternatively, while etching the surface layer of the wavelength conversion member with carbon, using a SEM-EDX (Scanning Electron Microscope®-Energy Dispersive®X-ray Spectrometer, Scanning Analytical Electron Microscope; for example, JEOL type JSM670) By measuring the intensity of the element in the thickness direction (depth direction), it is possible to identify the uneven distribution region of the particles in the wavelength conversion member.

Specifically, a value obtained by the following method can be used as an index of uneven distribution of particles in the wavelength conversion member (index of particle uneven distribution).
(Indicator of particle uneven distribution)
A cross section obtained by cutting the wavelength conversion member, for example, a cross section cut by a microtome, is observed using SEM-EDX (for example, JSM670 type manufactured by JEOL), and the number of particles in the cross section to be observed is measured. The direction perpendicular to the excitation light incident side surface and the emission side surface of the wavelength conversion member is taken as the x-axis. The thickness of the wavelength conversion member along the x axis is defined as L, where x = 0 is defined as the temporary support side surface and x = L is defined as the barrier member B side surface. Let φ (x) be the normalized number density distribution of particles in the cut section.
That means
Formula 1
∫ (0 → L) φ (x) dx = 1
Is established.
Φ represented by the following formula is defined as an index representing the uneven distribution of particles in the wavelength conversion member.
Formula 2
Φ = ∫ (0 → L) φ (x) x / L dx
When Φ = 1, in the wavelength conversion member, all particles are present on the barrier member B side surface, and when Φ = 0, they are present on the temporary support side surface. On the other hand, when the particles are uniformly distributed in the wavelength conversion member, Φ = 0.5. Therefore, when a particle uneven distribution region exists in the temporary support side surface layer region of the wavelength conversion member, Φ is more than 0 and less than 0.5.
Similarly, it is possible to specify the particle uneven distribution region in the temporary support.

By the way, the wavelength conversion layer containing a quantum dot can improve the light emission intensity | strength and can achieve a brightness | luminance improvement by raising the extraction efficiency of the light internally emitted within the layer. However, the light emitted from the wavelength conversion layer undergoes total reflection depending on the angle of incidence on the adjacent layer interface having a different refractive index, and is guided inside the wavelength conversion layer, resulting in a decrease in light extraction efficiency. Therefore, providing a light scattering structure to improve the light extraction efficiency is effective for further improving the light emission efficiency of the wavelength conversion member. As such a light scattering structure, a particle-containing layer and a particle uneven distribution region are effective.
From the viewpoint of improving the extraction efficiency, it is preferable to use particles having a primary particle size (primary particle size) of 100 nm or more, more preferably particles having a primary particle size of 500 nm or more, and a primary particle size of 1 μm or more. More preferably, the particles are used. The primary particle size of the particles is preferably 10 μm or less, more preferably 8 μm or less, and still more preferably 5 μm or less.
The particle diameter in the present invention and the present specification is a value determined by observing with a scanning electron microscope (SEM). Specifically, after photographing the cross section of the wavelength conversion layer or the barrier member at a magnification of 5000 times, the particle size is measured from the obtained image. For particles that are not spherical, the average value of the length of the major axis and the length of the minor axis is determined and adopted as the particle size. The same applies to the diameter described later.
The particles are preferably present as primary particles in the wavelength conversion member or the barrier member, but may be present as higher-order particles that are secondary particles or more. The particles present as higher-order particles (aggregated particles) higher than the secondary particles preferably have a particle size of the aggregated particles within the above range. In the present invention and the present specification, the particle size of the particles existing in the wavelength conversion member or the barrier member is the state existing in the member (for example, primary particle size if primary particles, secondary particle if Secondary particle size). In addition, the particle size described in Examples described later is a value obtained by observing and measuring the cross section of the wavelength conversion member or the barrier member using a scanning electron microscope (JSMOL type JSMOL type).

From the viewpoint of improving the light extraction efficiency, preferred particles (hereinafter referred to as “light scattering particles”) have a difference in refractive index from the matrix constituting the layer containing the particles (particle-containing layer, wavelength conversion layer) (described later). The absolute value of | nb−ns |) is 0.02 or more. As the light scattering particles, only one type of particle may be used, or a plurality of types of particles may be used in combination. The light scattering particles may be inorganic particles or organic particles. Details thereof can be referred to paragraph 0022 of JP 2010-198735 A. For various components such as a matrix constituting the particle-containing layer and a method for producing the particle-containing layer, reference can be made to paragraphs 0023 to 0028 and 0033 to 0035 of the publication. The thickness of the particle-containing layer is not particularly limited, and is a dry thickness, for example, about 0.5 μm to 50 μm, but can be appropriately selected according to the purpose. From the viewpoint of oxygen barrier properties and light transmittance, the range is preferably 1 μm to 20 μm, more preferably 2 μm to 10 μm, and still more preferably 3 μm to 7 μm.

On the other hand, when light scattering particles are contained in the wavelength conversion layer, the mass density of the amount of light scattering particles in the wavelength conversion layer is preferably 2% or more from the viewpoint of improving light extraction efficiency. On the other hand, from the viewpoint of brittleness, the mass density of the light scattering particles in the wavelength conversion layer is preferably less than 30%.

From the viewpoint of improving light extraction efficiency, the refractive index ns of the light scattering particle is preferably such that the absolute value | nb−ns | of the difference from the refractive index nb of the matrix material is 0.02 or more, and 0.03 or more. More preferably, it is more preferably 0.10 or more. In addition, the refractive index in this invention shall mean the refractive index ne with respect to e line (546.1 nm) of Fraunhofer. Further, when two or more different types of light scattering particles are contained in the particle-containing layer or the wavelength conversion layer, it is preferable that at least one kind of light scattering particles have a refractive index satisfying the above absolute value, two or more types It is more preferable that the light scattering particles have a refractive index satisfying the absolute value, and it is further preferable that all the light scattering particles have a refractive index satisfying the absolute value. The refractive index ns of the light scattering particles may be larger or smaller than the refractive index nb of the matrix material.
A larger value of | nb−ns | is preferable because scattering efficiency is improved. On the other hand, the refractive indexes of the light scattering particles and the matrix are values specific to the material, and can be known by specifying the material from the spectrum of microscopic IR (microscopic infrared spectroscopy), for example.
The refractive index of the matrix can be measured using an Abbe refractometer. The refractive index of the matrix can be adjusted by adding fine particles having a refractive index different from that of the matrix and having a diameter of less than about 10 nm. The fine particles having a diameter of about several tens of nm used here are sufficiently small to hardly scatter visible light.

From the viewpoint of improving light extraction efficiency, the refractive index of the matrix is preferably small. In general, when light emitted from a resin having a refractive index greater than 1 is extracted into the air layer, incident light at a critical angle or more is totally reflected at the interface with air, resulting in a decrease in extraction efficiency. This critical angle is determined by Snell's law. The lower the refractive index of the matrix, the larger the critical angle and the higher the extraction efficiency. This tendency holds even when a high refractive index medium such as an inorganic barrier member is present on the surface on the emission side of the matrix.

From the viewpoint of improving the extraction efficiency, it is desirable to reduce backscattering and forward scattering. From this point, the diameter rs of the light scattering particles is preferably 0.5 μm or more from the viewpoint of reducing the influence of backscattering, and preferably 10 μm or less from the viewpoint of reducing the influence of forward scattering. That is, it is preferable to be in the range of 0.5 μm ≦ rs ≦ 10 μm. The diameter of the light scattering particles is more preferably 0.8 μm ≦ rs ≦ 8 μm, and further preferably 1 μm ≦ rs ≦ 5 μm.

It is also preferred that the temporary support (barrier member A) side surface layer region of the wavelength conversion member, preferably the exit side surface layer region, contain two or more kinds of light scattering particles having at least one of a refractive index and a diameter different from each other. By including two or more kinds of such light scattering particles, it is possible to suppress coloring caused by the scattering angle dependency of the scattered light, and a good white balance can be obtained. The ratio (number of particles) of the two kinds of light scattering particles is more preferably 1: 9 to 9: 1, and further preferably 2: 8 to 8: 2.

The light scattering particles contained in the surface layer region of the wavelength conversion member, preferably the emission side surface layer region, can exhibit the effect of improving the light extraction efficiency even if they are arranged so as to align with the surface of the layer. This is because total reflection can be prevented by disturbing the interface with the adjacent layer by the light scattering particles arranged in this way. In this case, even when the refractive index of the matrix is equal to that of the light scattering particles, a good effect of improving the extraction efficiency can be seen.

(Barrier members A and B)
The barrier members A and B included in the transfer material according to one embodiment of the present invention can each include one or more layers selected from an inorganic layer and an organic layer. The barrier member can also include a substrate. Details will be described later.
In the present invention and the present specification, the “inorganic layer” is a layer mainly composed of an inorganic material. The main component means a component having the largest content among the components contained in the layer. For a layer containing two or more different inorganic materials, the content refers to the total content of a plurality of different inorganic materials. The same applies to the main components related to the organic layer described later. The inorganic layer is preferably a layer formed only from an inorganic material. On the other hand, the organic layer is a layer mainly composed of an organic material, and preferably refers to a layer in which the organic material occupies 50% by mass or more, more preferably 80% by mass or more, and particularly 90% by mass or more. To do.

-Inorganic layer-
The inorganic material constituting the inorganic layer is not particularly limited, and for example, various inorganic compounds such as metals or inorganic oxides, nitrides, oxynitrides, and the like can be used. As an element constituting the inorganic material, silicon, aluminum, magnesium, titanium, tin, indium and cerium are preferable, and one or two or more of these may be included. Specific examples of the inorganic compound include silicon oxide, silicon oxynitride, aluminum oxide, magnesium oxide, titanium oxide, tin oxide, indium oxide alloy, silicon nitride, aluminum nitride, and titanium nitride. As the inorganic layer, a metal film such as an aluminum film, a silver film, a tin film, a chromium film, a nickel film, or a titanium film may be provided.

Among the above materials, silicon nitride, silicon oxide, or silicon oxynitride is particularly preferable from the viewpoint of forming a barrier member having high barrier properties. In one embodiment, an inorganic material selected from the group consisting of silicon nitride, silicon oxide, and silicon oxynitride in order to easily peel the interface between the temporary support (barrier member A) and the wavelength conversion member. It is preferable to provide an inorganic layer containing s as an outermost layer on the wavelength conversion member side of the temporary support (barrier member A), and adjacent to the wavelength conversion layer containing quantum dots in the organic matrix on the temporary support (barrier layer A). More preferably, it is provided as a layer adjacent to the wavelength conversion layer, which is a cured layer formed by curing the quantum dot-containing (meth) acrylate-based polymerizable composition. Note that in the present invention and the present specification, “adjacent” refers to direct contact without passing through another layer.

The formation method of the inorganic layer is not particularly limited, and can be formed by a known film forming method. From the viewpoint of realizing even better barrier properties, it is preferable to form an inorganic layer by depositing an inorganic material by vapor deposition. Here, the vapor deposition in the present invention refers to various film forming methods capable of evaporating or scattering the film forming material and depositing it on the surface to be vapor-deposited. More specifically, physical vapor deposition, sputtering, ion plating, etc. Phase growth methods (PVD) and various chemical vapor deposition methods (CVD) are included.

As a vapor deposition method, specifically, a vacuum vapor deposition method in which an inorganic material such as an inorganic oxide, an inorganic nitride, an inorganic oxynitride, or a metal is heated and vapor-deposited on a substrate; an inorganic material is used as a raw material, Oxidation reaction vapor deposition method in which oxygen gas is oxidized and vapor-deposited on a substrate; using an inorganic material as a target raw material, argon gas and oxygen gas are introduced, and sputtering is performed to deposit on the substrate. Sputtering method: Physical vapor deposition method (Physical Vapor Deposition method) such as ion plating method in which inorganic material is heated by a plasma beam generated by a plasma gun and deposited on a substrate, and a silicon oxide vapor deposition film is produced In the case of forming a film, a plasma chemical vapor deposition method using an organic silicon compound as a raw material (Chemical Vapor) eposition method), and the like.

The silicon oxide film can also be formed by using a low temperature plasma chemical vapor deposition method using an organosilicon compound as a raw material. Specific examples of the organosilicon compound include 1,1,3,3-tetramethyldisiloxane, hexamethyldisiloxane, vinyltrimethylsilane, hexamethyldisilane, methylsilane, dimethylsilane, trimethylsilane, diethylsilane, propyl Examples thereof include silane, phenylsilane, vinyltriethoxysilane, tetramethoxysilane, phenyltriethoxysilane, methyltriethoxysilane, and octamethylcyclotetrasiloxane. Among the organosilicon compounds, tetramethoxysilane (TMOS) and hexamethyldisiloxane (HMDSO) are preferably used. This is because these are excellent in handleability and vapor deposition film characteristics.

The thickness of the inorganic layer is preferably in the range of 10 nm to 500 nm, more preferably 10 nm to 300 nm, especially 10 nm to 150 nm. This is because when the thickness of the inorganic layer is within the above-described range, reflection in the inorganic layer can be suppressed and high light transmittance can be realized while realizing good barrier properties.
Moreover, the inorganic layer may be adjacent to the wavelength conversion layer included in the wavelength conversion member, and one or more other layers may exist between the inorganic layer and the wavelength conversion layer. In the latter case, since the inorganic layer is generally excellent in barrier properties, the distance between the wavelength conversion member side surface of the inorganic layer and the barrier member side surface of the wavelength conversion layer included in the wavelength conversion member is preferably less than 10 μm, More preferably, it is less than 5 μm. More preferably, the inorganic layer and the wavelength conversion layer are adjacent to each other.

-Organic layer-
JP, 2007-290369, A paragraphs 0020-0042 and JP, 2005-096108, A paragraphs 0074-0105 can be referred to as an organic layer. In addition, it is preferable that an organic layer contains a cardo polymer in one aspect | mode. As a result, the adhesion between the organic layer and the adjacent layer or substrate (details will be described later), in particular, the adhesion with the inorganic layer is improved, and even better gas barrier properties can be realized. is there. For details of the cardo polymer, reference can be made to paragraphs 0085 to 0095 of JP-A-2005-096108 described above. The thickness of the organic layer is preferably in the range of 0.05 μm to 10 μm, and more preferably in the range of 0.5 to 10 μm. When the organic layer is formed by a wet coating method, the thickness of the organic layer is preferably in the range of 0.5 to 10 μm, and more preferably in the range of 1 to 5 μm. Further, when formed by a dry coating method, it is preferably in the range of 0.05 μm to 5 μm, and more preferably in the range of 0.05 μm to 1 μm. This is because when the thickness of the organic layer formed by the wet coating method or the dry coating method is within the above-described range, the adhesion with the inorganic layer can be further improved.

In the present invention and the present specification, the polymer means a polymer obtained by polymerizing two or more compounds which are the same or different by a polymerization reaction, and includes an oligomer, and its molecular weight is not particularly limited. Absent. The polymer may be a polymer having a polymerizable group, and may be further polymerized by being subjected to a polymerization treatment according to the type of the polymerizable group such as heating and light irradiation.

Also, the organic layer can be a cured layer obtained by curing a polymerizable composition containing a (meth) acrylate polymer. The (meth) acrylate polymer is a polymer containing one or more (meth) acryloyl groups in one molecule. As an example of the (meth) acrylate polymer used for forming the organic layer, a (meth) acrylate polymer containing one or more urethane bonds in one molecule can be exemplified. Hereinafter, a (meth) acrylate polymer containing one or more urethane bonds in one molecule is referred to as a urethane bond-containing (meth) acrylate polymer. When the barrier members A and B include two or more organic layers, a cured layer obtained by curing a polymerizable composition containing a urethane bond-containing (meth) acrylate polymer and another organic layer may be included. Good. In one aspect, the wavelength conversion member side outermost layer of the barrier member B is preferably a cured layer formed by curing a polymerizable composition containing a urethane bond-containing (meth) acrylate polymer. The cured layer is a wavelength conversion member (preferably a wavelength conversion layer containing quantum dots in an organic matrix, more preferably a cured layer obtained by curing a quantum dot-containing (meth) acrylate-based polymerizable composition). This is because good adhesion to the layer) can be exhibited.

In the urethane bond-containing (meth) acrylate polymer, in one aspect, it is preferable that a structural unit having a urethane bond is introduced into a side chain of the polymer. Hereinafter, a main chain into which a structural unit having a urethane bond is introduced is referred to as an acrylic main chain.

In addition, it is also preferable that a (meth) acryloyl group is contained in at least one end of the side chain having a urethane bond. It is more preferable that a (meth) acryloyl group is contained in all of the side chains having a urethane bond. Here, the (meth) acryloyl group contained at the terminal is more preferably an acryloyl group.

The urethane bond-containing (meth) acrylate polymer can be generally obtained by graft copolymerization, but is not particularly limited. The acrylic main chain and the structural unit having a urethane bond may be directly bonded or may be bonded via a linking group. Examples of the linking group include an ethylene oxide group, a polyethylene oxide group, a propylene oxide group, and a polypropylene oxide group. The urethane bond-containing (meth) acrylate polymer may contain a plurality of side chains in which structural units having a urethane bond are bonded via different linking groups (including direct bonds).

The urethane bond-containing (meth) acrylate polymer may have a side chain other than the structural unit having a urethane bond. Examples of other side chains include linear or branched alkyl groups. As the linear or branched alkyl group, a linear alkyl group having 1 to 6 carbon atoms is preferable, an n-propyl group, an ethyl group, or a methyl group is more preferable, and a methyl group is further preferable. In addition, other side chains may include different structures. The same applies to structural units having a urethane bond.

The number of urethane bonds and (meth) acryloyl groups contained in one molecule of the urethane bond-containing (meth) acrylate polymer is 1 or more, preferably 2 or more, but is not particularly limited. . The weight average molecular weight of the urethane bond-containing (meth) acrylate polymer is preferably 10,000 or more, more preferably 12,000 or more, and further preferably 15,000 or more. The weight average molecular weight of the urethane bond-containing (meth) acrylate polymer is preferably 1,000,000 or less, more preferably 500,000 or less, and further preferably 300,000 or less. The acrylic equivalent of the urethane bond-containing (meth) acrylate polymer is preferably 500 or more, more preferably 600 or more, further preferably 7,000 or more, and the acrylic equivalent is 5,000 or less. Is preferably 3,000 or less, more preferably 2,000 or less. The acrylic equivalent is a value obtained by dividing the weight average molecular weight by the number of (meth) acryloyl groups in one molecule.

In the present invention and the present specification, the weight average molecular weight is a value obtained by converting a measured value by gel permeation chromatography (GPC) into polystyrene. The following measurement conditions can be mentioned as an example of the specific measurement conditions of a weight average molecular weight.
GPC device: HLC-8120 (manufactured by Tosoh Corporation):
Column: TSK gel Multipore HXL-M (7.8 mm ID (inner diameter) × 30.0 cm, manufactured by Tosoh Corporation)
Eluent: Tetrahydrofuran (THF)

As the urethane bond-containing (meth) acrylate polymer, one synthesized by a known method may be used, or a commercially available product may be used. As a commercial item, the Taisei Fine Chemical Co., Ltd. UV (Ultraviolet) curable acrylic urethane polymer (8BR series) can be mentioned, for example. The urethane bond-containing (meth) acrylate polymer is preferably contained in an amount of 5 to 90% by mass, preferably 10 to 80% by mass, based on 100% by mass of the total solid content of the polymerizable composition for forming the organic layer. Is more preferable.

In the curable compound used to form the organic layer, one or more urethane bond-containing (meth) acrylate polymers may be used in combination with one or more other polymerizable compounds. As the other polymerizable compound, a compound having an ethylenically unsaturated bond at a terminal or a side chain is preferable. Examples of compounds having an ethylenically unsaturated bond at the terminal or side chain include (meth) acrylate compounds, acrylamide compounds, styrene compounds, maleic anhydride, etc., (meth) acrylate compounds are preferred, and acrylate compounds Is more preferable.
As the (meth) acrylate compound, (meth) acrylate, polyester (meth) acrylate, epoxy (meth) acrylate and the like are preferable. Specific examples of the (meth) acrylate compound include compounds described in paragraphs 0024 to 0036 of JP2013-43382A or paragraphs 0036 to 0048 of JP2013-43384A.
As the styrene compound, styrene, α-methylstyrene, 4-methylstyrene, divinylbenzene, 4-hydroxystyrene, 4-carboxystyrene and the like are preferable.

The polymerizable composition used for forming the organic layer may contain a known additive together with one or more polymerizable compounds. An example of such an additive is a known organometallic coupling agent. The organometallic coupling agent is preferably 0.1 to 30% by mass, more preferably 1 to 20% by mass, based on 100% by mass of the total solid content of the polymerizable composition used for forming the organic layer.

Also, examples of the additive include a polymerization initiator. When a polymerization initiator is used, the content of the polymerization initiator in the polymerizable composition is preferably 0.1 mol% or more, and preferably 0.5 to 5 mol% of the total amount of the polymerizable compounds. More preferred. Examples of photopolymerization initiators include Irgacure series (for example, Irgacure 651, Irgacure 754, Irgacure 184, Irgacure 2959, Irgacure 907, Irgacure 369, Irgacure 379, Irgacure 819, etc.), Darocur, etc., commercially available from BASF. (Darocure) series (for example, Darocur TPO, Darocur 1173, etc.), Quantacure PDO, Ezacure series (for example, Ezacure TZM, Ezacure TZT, Ezacure KTO 46, etc.) commercially available from Lamberti ) And the like.

The curing of the polymerizable composition for forming the organic layer may be performed by treatment (light irradiation, heating, etc.) according to the type of components (polymerizable compound or polymerization initiator) contained in the polymerizable composition. Curing conditions are not particularly limited, and may be set according to the types of components contained in the polymerizable composition, the thickness of the organic layer, and the like.

Although increasing the number of layers included in the barrier member is preferable from the viewpoint of improving the barrier property, the light transmittance tends to decrease as the number of layers increases. Therefore, it is desirable to increase the number of layers of the barrier member B incorporated in the transfer product within a range in which good light transmittance can be maintained. The total light transmittance in the visible light region of the barrier member B is preferably 80% or more. Moreover, it is preferable that the oxygen permeability of both the barrier members A and B is 1 cm ³ / (m ² · day · atm) or less. Here, the oxygen permeability is a value measured using an oxygen gas permeability measuring device (manufactured by MOCON, OX-TRAN 2/20: trade name) under the conditions of a measurement temperature of 23 ° C. and a relative humidity of 90%. It is. The visible light region is a wavelength region of 380 to 780 nm, and the total light transmittance is an average value of light transmittance over the visible light region.
The oxygen permeability of the barrier members A and B is more preferably 0.1 cm ³ / (m ² · day · atm) or less, and more preferably 0.01 cm ³ / (m ² · day · atm) or less. . The total light transmittance in the visible light region is more preferably 90% or more. The lower the oxygen permeability, the better, and the higher the total light transmittance in the visible light region, the better.
On the other hand, the water vapor permeability of the barrier member A, B ^{is, 0.5g / (m 2 · day} ) or less, preferably 0.1g / (m ² · day) or less, particularly 0.05g / (m ² · day) or less It is preferable that According to the barrier member having a low water vapor transmission rate, deterioration of the quantum dots due to water such as water vapor can be prevented. The water vapor transmission rate is a value measured using a water vapor transmission rate measurement device (manufactured by MOCON, PERMATRAN-W 3/31: trade name) under the conditions of a measurement temperature of 37.8 ° C. and a relative humidity of 100%. .

As for other details of the inorganic layer and the organic layer having a barrier property, reference can be made to the descriptions in JP-A-2007-290369, JP-A-2005-096108 and US2012 / 0113672A1.

In addition, a support for forming a barrier member between an organic layer and an inorganic layer, between two organic layers, between two inorganic layers, or for forming a barrier member for improving the strength, forming a film easily, etc. As a base material (base material film) may exist. The substrate is preferably a transparent substrate that is transparent to visible light. Here, being transparent to visible light means that the light transmittance in the visible light region is 80% or more, preferably 85% or more. The light transmittance used as a measure of transparency is measured by measuring the total light transmittance and the amount of scattered light using the method described in JIS-K7105, that is, using an integrating sphere light transmittance measuring device. It can be calculated by subtracting the rate. Regarding the base material, paragraphs 0046 to 0052 of JP-A-2007-290369 and paragraphs 0040 to 0055 of JP-A-2005-096108 can be referred to. The thickness of the substrate is preferably in the range of 10 μm to 500 μm, more preferably in the range of 10 to 400 μm, particularly preferably in the range of 10 to 300 μm from the viewpoint of gas barrier properties, impact resistance, and the like.

A known adhesive layer may be bonded between the organic layer and the inorganic layer, between the two organic layers, or between the two inorganic layers. From the viewpoint of improving the light transmittance of the liquid crystal display device, the smaller the number of adhesive layers that the barrier member B will contain in the transferred product after the transfer, the better.

(Easily adhesive layer)
The barrier member B preferably exhibits barrier properties even after being incorporated in a transfer product without being removed from the transfer, and protects the quantum dots in the wavelength conversion layer. From this point, it is preferable to improve the adhesion between the barrier member B and the wavelength conversion member. On the other hand, from the viewpoint of ease of peeling between the barrier member A and the wavelength conversion member, in one embodiment, it is preferable that no easy-adhesion layer is interposed between the barrier member A and the wavelength conversion member. In another aspect, from the viewpoint of preventing the deterioration of the quantum dots, it is preferable that the barrier member A also has good adhesion with the wavelength conversion member until it is removed during transfer. Therefore, an easy adhesion layer may be interposed between the barrier member A and the wavelength conversion member.

The easy adhesion layer is not particularly limited, and a known layer can be used. From the viewpoint of improving adhesion, an easy-adhesion layer containing at least one selected from polyester resins, acrylic resins and urethane resins is preferred, and more preferably containing two or more selected from polyester resins, acrylic resins and urethane resins. .

JP, 2013-230697, A paragraph 0044 can be referred to for the details of polyester resin. The polyester resin is preferably an aliphatic polyester, and more preferably an alicyclic polyester. The alicyclic polyester is composed of an alicyclic dicarboxylic acid as a main dicarboxylic acid component and an alicyclic diol as a main diol component. JP, 2009-209285, A paragraphs 0014-0025 can be referred to for details of alicyclic polyester.

JP, 2013-230697, A paragraphs 0062-0063 can be referred to for details of acrylic resin. JP, 2013-230697, A paragraphs 0064-0073 can be referred to for details of urethane resin.

The total content of the polyester resin, acrylic resin and urethane resin in the easy-adhesion layer is usually 10% by mass or more, preferably 30 to 95% by mass, more preferably from the viewpoint of obtaining better adhesion. It is in the range of 40 to 95% by mass. Moreover, in order to improve an application surface condition and transparency, it is also possible to use together well-known components and additives, such as binder polymers other than the said resin component, a crosslinking agent, and a particle, in an easily bonding layer. Specific examples of the binder polymer include polyalkylene glycol, polyalkyleneimine, methylcellulose, hydroxycellulose, starches and the like. JP, 2013-230697, A paragraphs 0052-0056 can be referred to about a crosslinking agent. These cross-linking agents may be used alone or in combination of two or more.

Furthermore, the easy-adhesion layer may contain particles for the purpose of improving the blocking property and slipperiness of the easy-adhesion layer. Examples of the particles include inorganic particles such as silica, alumina, and metal oxide, or organic particles such as crosslinked polymer particles.

The thickness of the easy-adhesion layer is not particularly limited, but is usually 0.002 to 1.0 μm, more preferably 0.02 to 0.5 μm, and still more preferably, from the viewpoints of adhesion and transparency. It is in the range of 0.03 to 0.2 μm. The easy adhesion layer can be formed by, for example, a known coating method. Regarding the coating method, for example, refer to paragraphs 0083 to 0088 of JP2013-230697A.

(Adhesive layer)
In one aspect, the temporary support (barrier member A) may have an adhesive layer on the surface to be bonded to the wavelength conversion member. The adhesive layer plays a role of bonding the transfer material from which the temporary support has been removed and the transfer object by at least partly remaining on the wavelength conversion member after the temporary support is removed at the time of transfer. You can also However, the temporary support may not include an adhesive layer. In this case, after the temporary support is peeled off from the transfer material, an adhesive layer is formed on the surface exposed by peeling (applying a pressure-sensitive adhesive) so that the pressure-sensitive adhesive and the transfer object are bonded together. Can do.

The adhesive layer can be formed using a known adhesive. For example, a self-adhesive layer made of an ethylene-vinyl acetate copolymer or the like, an acrylic resin, a styrene resin, a silicone resin, or the like as a base polymer, and a crosslinking agent such as an isocyanate compound, an epoxy compound, or an aziridine compound is added thereto. A pressure-sensitive adhesive layer made of the composition can be used. Furthermore, the adhesive layer which shows light-scattering property can also be formed by mix | blending microparticles | fine-particles in an adhesive.

The thickness of the pressure-sensitive adhesive layer is preferably about 1 to 40 μm from the viewpoint of pressure-sensitive adhesiveness and prevention of the applied pressure-sensitive adhesive from sticking out, and is preferably applied thinly in a range that does not impair the workability and pressure-sensitive properties. More preferably, it is 3 to 25 μm. When the thickness is 3 to 25 μm, particularly good workability is obtained. The method for forming the adhesive layer is not particularly limited. The adhesive layer may be formed by applying a solution containing the above-described base polymer and other components to the surface to be coated and drying the separator. After the adhesive layer is formed on the surface, it may be laminated by being attached to the surface to be coated. The application surface to which the adhesive is applied may be subjected to an adhesion treatment such as a corona treatment, if necessary.

As described above, the temporary support temporary support is a support that is peeled off before the transfer material is transferred to the transfer object. The temporary support in the transfer material is a barrier member (barrier member A) that includes one or more layers having a barrier property and can optionally include a base material, an easy-adhesion layer, an adhesive layer, and the like. Details of the various layers and the base material that can constitute the barrier member are as described above.

Method for Producing Transfer Material The transfer material can be formed by laminating the above-described layers and base materials. The lamination method and order are not particularly limited. As an example, a laminated body including a temporary support (barrier member A) and a barrier member B is prepared, a wavelength conversion member is formed on the surface of one barrier member, and the formed wavelength conversion member is bonded to the other. A transfer material including the temporary support (barrier member A), the wavelength conversion member, and the barrier member B in this order can be obtained. Bonding can be performed using a known pressure-sensitive adhesive or adhesive. Alternatively, lamination using an adhesive or lamination (thermocompression bonding) performed without an adhesive is also possible.
As another example, when the wavelength conversion layer is hardened by heat or light, one surface is sandwiched by a temporary support (barrier member A) and the other surface is sandwiched by a laminate including the barrier member B. A membrane can also be formed. The transfer material can also be obtained by controlling the adhesion between both surfaces of the wavelength conversion member to make it asymmetric.

The transfer material described above can be used as a transfer material for bonding to a constituent member of a liquid crystal display device, and is preferably used as a transfer material for manufacturing a liquid crystal panel. This is because the substrate (usually a glass substrate) included in the liquid crystal panel has a high barrier property, and thus can successfully perform the role of protecting the quantum dots after the temporary support (barrier member A) is peeled and removed. . By using in this way, it is possible to reduce the thickness of the LCD without relying on a thinner wavelength conversion layer. A mode in which the transfer material is used for manufacturing a liquid crystal panel will be described later.

[Method for producing liquid crystal panel with wavelength conversion member]
A further aspect of the invention provides:
Peeling off the barrier member A (temporary support) of the transfer material, and
Bonding the exposed surface exposed by peeling with the liquid crystal panel surface including at least the liquid crystal cell;
A method for producing a liquid crystal panel with a wavelength conversion member,
About.

The liquid crystal display device is usually composed of at least a liquid crystal panel including a liquid crystal cell and a backlight unit. A wavelength conversion member having a wavelength conversion layer containing quantum dots has been conventionally used as a constituent member of a backlight unit in a liquid crystal display device. On the other hand, according to one aspect of the present invention, a liquid crystal panel including a wavelength conversion member can be manufactured.

The method for peeling the temporary support is not particularly limited. Peeling of the temporary support is preferably performed at a speed that does not cause damage to the transferred product after peeling. .

As described above, if there is an adhesive layer between the temporary support and the wavelength converting member, and the adhesive layer remains on the exposed surface exposed by peeling, the exposed surface is directly bonded to the liquid crystal panel surface. Can do. Alternatively, after the adhesive is applied to the exposed surface, it can be bonded to the surface of the liquid crystal panel. The pressure-sensitive adhesive is as described above.

The environment in which the temporary support is peeled off and bonded to the liquid crystal panel is preferably a closed chamber, and more preferably in a nitrogen atmosphere, from the viewpoint of preventing contact between the quantum dots contained in the wavelength conversion layer and oxygen. . However, even if the environment is not as described above, if the temporary support can be peeled off and bonded to the liquid crystal panel in a relatively short time (for example, within 30 minutes), the quantum dots contained in the wavelength conversion layer It is possible to prevent a decrease in luminous efficiency.

The liquid crystal panel includes a liquid crystal cell, and usually polarizing plates (viewing side polarizing plate and backlight side polarizing plate) are arranged on the viewing side and the backlight side, respectively. The transfer material may be bonded to either the viewing-side polarizing plate surface or the backlight-side polarizing plate surface. From the viewpoint of easily and satisfactorily realizing a multi-wavelength light source by wavelength conversion using a wavelength conversion member, liquid crystal is used. It is preferable to bond to the backlight side surface of the panel. The backlight side surface to be bonded can be the backlight side polarizing plate surface. Moreover, it is also preferable to stick together on surfaces, such as a brightness enhancement film, provided on the backlight side polarizing plate surface. As the brightness enhancement film, a known brightness enhancement film such as a prism sheet can be used.

Next, a liquid crystal panel that is an object to be transferred will be described.

(Liquid crystal cell)
The driving mode of the liquid crystal cell is not particularly limited, and is twisted nematic (TN), super twisted nematic (STN), vertical alignment (VA), in-plane switching (IPS), and optically compensated bend cell (OCB). Various modes such as can be used.

The liquid crystal cell usually includes two substrates and a liquid crystal layer located between the two substrates. The substrate is generally a glass substrate, but may be a plastic substrate or a laminate of glass and plastic. When a plastic alone is used as a substrate, a material having almost no optical anisotropy in the plane, such as PC (polycarbonate) or PES (polyether sulfone), is useful because it does not hinder the polarization control by the liquid crystal layer. . The thickness of one substrate is generally in the range of 50 μm to 2 mm.

The liquid crystal layer of a liquid crystal cell is usually formed by enclosing liquid crystal in a space formed by sandwiching a spacer between two substrates. Usually, a transparent electrode layer is formed on a substrate as a transparent film containing a conductive substance. The liquid crystal cell may be further provided with a layer such as an undercoat layer (undercoat layer) used for bonding a gas barrier layer, a hard coat layer, and a transparent electrode layer. These layers are usually provided on the substrate.

(Polarizer)
The viewing-side polarizing plate and the backlight-side polarizing plate are not particularly limited, and any polarizing plate that is usually used in a liquid crystal display device can be used without any limitation. For example, a polarizing plate including a stretched film obtained by immersing and stretching a polyvinyl alcohol film in an iodine solution can be used. The thickness of the polarizer is not particularly limited. From the viewpoint of reducing the thickness of the liquid crystal display device, the thinner it is, the more preferable. In order to maintain the contrast of the polarizing plate, it is preferable to have a certain thickness. From the above points, the thickness of both the viewing side polarizer and the backlight side polarizer is preferably in the range of 0.5 μm to 80 μm, more preferably in the range of 0.5 μm to 50 μm, and still more preferably in the range of 1 μm to 25 μm. It is. The thicknesses of the viewing side polarizer and the backlight side polarizer may be the same or different. JP, 2012-189818, A paragraphs 0037-0046 can be referred to for details of a polarizer.

(Protective film)
The polarizing plate usually has a protective film on one or both surfaces of the polarizer. Also in the liquid crystal panel to be transferred, the viewing side polarizer and the backlight side polarizer may each have a protective film on one or both surfaces. The thickness of the protective film can be appropriately set, but is generally about 1 to 500 μm, preferably 1 to 300 μm, more preferably 5 to 200 μm from the viewpoint of strength, workability such as handling, and thinning. More preferably, it is 5 to 150 μm. Note that both the viewing-side polarizer and the backlight-side polarizer may be bonded to the liquid crystal cell without using a protective film. This is because the liquid crystal cell, in particular, the substrate can exhibit a barrier function.

As the protective film for the polarizing plate, a thermoplastic resin excellent in transparency, mechanical strength, thermal stability, moisture barrier property, isotropy and the like is preferably used. Specific examples of such thermoplastic resins include cellulose resins such as triacetyl cellulose, polyester resins, polyethersulfone resins, polysulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins, cyclic Examples include polyolefin resins (norbornene resins), polyarylate resins, polystyrene resins, polyvinyl alcohol resins, and mixtures thereof. JP, 2012-189818, A paragraphs 0049-0054 can be referred to for details of resin which can be used as a protective film.

As the polarizing plate protective film, a film having one or more functional layers on a thermoplastic resin film can also be used. The functional layer includes a low moisture permeability layer, a hard coat layer, an antireflection layer (a layer having a adjusted refractive index such as a low refractive index layer, a medium refractive index layer, a high refractive index layer), an antiglare layer, an antistatic layer, and an ultraviolet ray An absorption layer etc. are mentioned. For these functional layers, known techniques can be applied without any limitation. The thickness of the protective film having a functional layer is, for example, in the range of 5 to 100 μm, preferably in the range of 10 to 80 μm, and more preferably in the range of 15 to 75 μm. In addition, it is also possible to laminate | stack only a functional layer on a polarizer without a thermoplastic resin film.

(Adhesive layer, adhesive layer)
The polarizer and the protective film can be bonded together by a known adhesive layer or adhesive layer. For details, refer to paragraphs 0056 to 0058 of JP2012-189818A and paragraphs 0061 to 0063 of JP2012-133296A, for example.

(Retardation layer)
The viewing side polarizing plate and the backlight side polarizing plate can also have at least one phase difference layer between the liquid crystal cell. For example, you may have a phase difference layer as an inner side polarizing plate protective film by the side of a liquid crystal cell. A known cellulose acylate film or the like can be used as such a retardation layer.

[Method for manufacturing liquid crystal display device]
A further aspect of the invention provides:
By the above method, producing a liquid crystal panel with a wavelength conversion member, and
Assembling a liquid crystal display device by combining the manufactured liquid crystal panel and the backlight unit,
A method for manufacturing a liquid crystal display device,
About. From the viewpoint of easily and satisfactorily realizing a multi-wavelength light source by wavelength conversion by the wavelength conversion member, it is preferable to combine the liquid crystal panel with the backlight unit so that the wavelength conversion member is disposed on the backlight side.

(Backlight unit)
As the backlight, an edge light type and a direct type are known. The backlight unit may be of any type.

In one embodiment, a light source that emits blue light having an emission center wavelength in the wavelength band of 430 nm to 480 nm, for example, a blue light emitting diode that emits blue light can be used. When a light source that emits blue light is used, the wavelength conversion member includes at least quantum dots A that are excited by excitation light and emit red light and quantum dots B that emit green light in the same layer or different layers. It is preferably included. Thereby, white light can be embodied by blue light emitted from the light source and transmitted through the wavelength conversion member, and red light and green light emitted from the wavelength conversion member.
Alternatively, in another aspect, a light source that emits ultraviolet light having an emission center wavelength in the wavelength band of 300 nm to 430 nm, for example, an ultraviolet light emitting diode can be used. In this case, the wavelength conversion member preferably includes quantum dots C that are excited by excitation light and emit blue light together with quantum dots A and B in the same layer or different layers. Thereby, white light can be embodied by red light, green light, and blue light emitted from the wavelength conversion member.
In other embodiments, the light emitting diode can be replaced with a laser light source.

Also, the backlight unit can include a reflecting member at the rear of the light source. There is no restriction | limiting in particular as such a reflecting member, A well-known thing can be used, and it is described in patent 3416302, patent 3363565, patent 4091978, patent 3448626, etc., The content of these gazettes is this Incorporated into the invention.

The backlight unit includes other known diffusion plates and diffusion sheets, brightness enhancement films (for example, prism sheets such as BEF series manufactured by Sumitomo 3M, and reflective polarizers such as DBEF (registered trademark) series manufactured by Sumitomo 3M), It is also preferable to provide an optical device. Other members are also described in Japanese Patent No. 3416302, Japanese Patent No. 3363565, Japanese Patent No. 4091978, Japanese Patent No. 3448626, and the contents of these publications are incorporated in the present invention.

(Emission wavelength)
From the viewpoint of realizing high luminance and high color reproducibility, it is preferable to use a backlight unit that has been converted to a multi-wavelength light source. In a preferred embodiment,
Blue light having an emission center wavelength in a wavelength band of 430 to 480 nm and a peak of emission intensity having a half width of 100 nm or less;
Green light having an emission center wavelength in a wavelength band of 500 to 600 nm and a peak of emission intensity having a half-width of 100 nm or less;
Red light having an emission center wavelength in a wavelength band of 600 to 680 nm and a peak of emission intensity having a half width of 100 nm or less;
It is preferable to emit light.
From the viewpoint of further improving luminance and color reproducibility, the wavelength band of the blue light emitted from the backlight unit is preferably in the range of 440 to 480 nm, and more preferably in the range of 440 to 460 nm.
From the same viewpoint, the wavelength band of the green light emitted from the backlight unit is preferably in the range of 510 to 560 nm, and more preferably in the range of 510 to 545 nm.
From the same viewpoint, the wavelength band of red light emitted from the backlight unit is preferably in the range of 600 to 650 nm, and more preferably in the range of 610 to 640 nm.

From the same point of view, the half-value width of each emission intensity of blue light, green light and red light is preferably 80 nm or less, more preferably 50 nm or less, and further preferably 40 nm or less. More preferably, it is 30 nm or less. Among these, it is particularly preferable that the half-value width of each emission intensity of blue light is 25 nm or less.

In one embodiment of the liquid crystal display device, a liquid crystal cell having a liquid crystal layer sandwiched between substrates provided with electrodes on at least one of the opposite sides is provided, and the liquid crystal cell is arranged between two polarizing plates. The liquid crystal display device includes a liquid crystal cell in which liquid crystal is sealed between upper and lower substrates, and displays an image by changing the alignment state of the liquid crystal by applying a voltage. Furthermore, it has an accompanying functional layer such as a polarizing plate protective film, an optical compensation member that performs optical compensation, and an adhesive layer as necessary. Along with (or instead of) a color filter substrate, thin layer transistor substrate, lens film, diffusion sheet, hard coat layer, antireflection layer, low reflection layer, antiglare layer, etc., forward scattering layer, primer layer, antistatic layer Further, a surface layer such as an undercoat layer may be disposed.

According to the embodiment of the present invention described above, it is possible to achieve both protection of quantum dots and thinning of the liquid crystal display device.

Hereinafter, the present invention will be described more specifically based on examples. The materials, amounts used, ratios, processing details, processing procedures, and the like shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the specific examples shown below.

I. Examples and comparative examples for transfer materials

[Comparative Example 101]
1. Preparation of Quantum Dot-Containing Polymerizable Composition 0.54 ml of trimethylolpropane acrylate, 2.4 ml of lauryl methacrylate, and Irgacure (registered trademark) 819 manufactured by BASF as a photopolymerization initiator were mixed to obtain a polymerizable composition.
With respect to 100 mg of the obtained polymerizable composition, a toluene dispersion of quantum dots, a quantum dot A having an emission peak in the wavelength band of 600 to 680 nm, and an emission center wavelength in a shorter wavelength range than the quantum dot A A quantum dot B having an emission peak in the wavelength band of 500 to 600 nm was added so that the concentration of each quantum dot was 0.5 mass%, and vacuum drying was performed for 30 minutes. Stirring was performed until the quantum dots were dispersed to obtain a quantum dot dispersion (quantum dot-containing polymerizable composition).

2. Preparation of barrier film (barrier member) (1) Preparation of inorganic layer Base film with single-sided easy-adhesion layer (polyethylene terephthalate (PET) film, Toyobo Cosmo Shine (registered trademark) A4100, thickness 50 μm, wavelength) A refractive index nu (535) at 535 nm: 1.62) was used and placed in the chamber of the magnetron sputtering apparatus. Silicon nitride was used as a target, and film formation was performed on the easy-adhesion surface side so that the thickness of silicon nitride was 1 μm under the following film formation conditions.
Deposition pressure: 2.5 × 10 ⁻¹ Pa
Argon gas flow rate: 20 sccm
Nitrogen gas flow rate: 9sccm
Frequency: 13.56MHz
Electric power: 1.2kW
(2) Preparation of organic layer On the inorganic layer obtained in (1) above, a resin having a cardo polymer having a fluorene skeleton is applied by a spin coating method, and heated at 160 ° C. for 1 hour to obtain an organic layer. A layer was formed. The thickness of the organic layer was 2 μm. In this way, a barrier film (barrier member) was obtained. In addition, when the barrier property of the obtained barrier film was measured by the above-described method, the oxygen permeability was 0.1 cm ³ / (m ² · day · atm) or less, and the water vapor permeability was 0.5 g / (m ² -Day) It was below.
A total of two barrier films were produced by the above process.

3. Production of non-transfer material 2. On the surface of the base film of the barrier film prepared in 1 above. The quantum dot dispersion prepared in step 1 is applied so that the final thickness is 50 μm, and another barrier film is overlaid so that the substrate film surface is on the quantum dot dispersion side. A photosensitive layer sandwiched between two barrier films was formed.
Using a UV exposure machine (EXECURE 3000W manufactured by HOYA CANDEO OPTRONICS), the photosensitive layer is exposed with an ultraviolet irradiation amount of 5 J / cm ² to cure the photosensitive layer, and the non-transfer material 101 is cured. Obtained.

[Comparative Example 102]
The non-transfer material is the same as the non-transfer material 101 except that a base film with a double-sided easy-adhesion layer (PET film, Toyobo Cosmo Shine A4300, thickness 50 μm) is used as the barrier film base material. 102 was obtained.

[Example 103]
As a base material of one barrier film (barrier member B), a base film with a double-sided easy-adhesion layer (PET film, Cosmo Shine A4300 manufactured by Toyobo Co., Ltd., thickness 50 μm) is used, and the other barrier film (barrier member A) is used. A substrate film with a single-sided easy-adhesion layer (PET film, Toyobo Cosmo Shine A4300, thickness 50 μm) was used as the substrate, and the quantum dot dispersion was applied to a final thickness of 100 μm. A transfer material 103 was obtained in the same manner as the non-transfer material 101 except for the above.

[Example 104]
Silica particles (corefront sicastar manufactured by Core Front Co., Ltd., particle diameter (primary particle diameter) 100 nm measured in the wavelength conversion layer) were added to the quantum dot dispersion liquid, and the completed quantum dot dispersion liquid had a thickness of 100 μm. A transfer material 104 was obtained in the same manner as in the preparation of the non-transfer material 102 except that the coating was performed so that
When the cross section of the transfer material 104 was observed with an optical microscope, the added silica particles were unevenly distributed near the interface between the barrier member A and the wavelength conversion layer.

[Example 105]
Silica particles (corefront sicastar manufactured by Core Front Co., Ltd., particle diameter (primary particle diameter) 500 nm measured in the wavelength conversion layer) were added to the quantum dot dispersion liquid, and the completed thickness of the quantum dot dispersion liquid was 100 μm. A transfer material 105 was obtained in the same manner as in the preparation of the non-transfer material 102 except that the coating was performed so that
When the cross section of the transfer material 105 was observed with an optical microscope, the added silica particles were unevenly distributed near the interface between the barrier member A and the wavelength conversion layer.

[Example 106]
Silica particles (corefront sicastar manufactured by Core Front Co., Ltd., particle diameter (primary particle diameter) of 4 μm measured in the wavelength conversion layer) were added to the quantum dot dispersion liquid, and the completed thickness of the quantum dot dispersion liquid was 100 μm. A transfer material 106 was obtained in the same manner as in the preparation of the non-transfer material 102 except that the coating was performed so that
When the cross section of the transfer material 106 was observed with an optical microscope, the added silica particles were unevenly distributed near the interface between the barrier member A and the wavelength conversion layer.

[Example 107]
Production of the non-transfer material 102 except that a barrier film with a particle-containing layer obtained by the following method was used as the barrier member A and that the quantum dot dispersion was applied to a final thickness of 100 μm. In the same manner as described above, a transfer material 107 was obtained.
<Production of barrier film with particle-containing layer>
Titanium oxide slurry (trade name HTD-760T manufactured by Teika Co., Ltd., titanium oxide particle size (primary particle size) measured at the barrier member: 15 nm), fluorene derivative acrylate (trade name OGSOL EA-0200 manufactured by Osaka Gas Chemical Co., Ltd.) , And toluene were stirred and dissolved by a roller and a stirrer, and titanium oxide particles were sufficiently dispersed by ultrasonic waves to prepare a titanium oxide-dispersed toluene solution. The volume ratio of the titanium oxide particles and the resin material (fluorene derivative acrylate) in the prepared titanium oxide-dispersed toluene liquid was titanium oxide: resin material = 25: 75.
While stirring the cross-linked acrylic particles (particle size (primary particle size) observed in the barrier member: 1.5 μm, trade name: EX-150, manufactured by Soken Chemical Co., Ltd.) and toluene with the above-mentioned titanium oxide-dispersed toluene solution with a stirrer Doped. The volume ratio of the solid content of the titanium oxide-dispersed toluene liquid and the crosslinked acrylic particles was 50:50. Furthermore, the crosslinked acrylic particles were sufficiently dispersed with ultrasonic waves, and further stirred with a stirrer.
A polymerization initiator (trade name IRGACURE 819, manufactured by BASF) was added to the liquid mixture thus obtained to obtain a composition for forming a particle-containing layer.
The resulting particle-containing layer forming composition is
The barrier film was formed as 1. It apply | coated using the wire bar on the easily bonding layer of the barrier member produced by (1), Then, ultraviolet irradiation (wavelength 365nm) was performed for 10 minutes, it was made to harden | cure, and the particle | grain containing layer was formed (thickness 5 micrometers).
Thus, the barrier film with a particle content layer was obtained. Observation with a scanning electron microscope confirmed that the particles were present as primary particles in the particle-containing layer.

[Example 108]
1. Preparation of Quantum Dot-Containing Polymerizable Composition The following quantum dot-containing polymerizable composition A was prepared, filtered through a polypropylene filter having a pore size of 0.2 μm, and then dried under reduced pressure for 30 minutes to be used as a coating solution.
─────────────────────────────────
Quantum dot-containing polymerizable composition A
─────────────────────────────────
17. Toluene dispersion of quantum dots 1 (emission maximum: 535 nm) 10.0 parts by mass Toluene dispersion of quantum dots 2 (emission maximum: 630 nm) 1.0 part by weight lauryl methacrylate 80.8 parts by weight trimethylolpropane triacrylate 2 parts by mass photopolymerization initiator 1.0 part by mass (Irgacure 819 (manufactured by BASF))
─────────────────────────────────

As the toluene solution of the quantum dot 1, a dispersion liquid (NN-Labs CZ520-100) containing a quantum dot that emits green light (emission maximum: 535 nm) was used. In addition, as the toluene solution of the quantum dots 2, a dispersion liquid (NN-Labs CZ620-100) containing quantum dots that emit red light (emission maximum: 630 nm) was used. Each of the quantum dots 1 and 2 is a quantum dot containing CdSe as a core, ZnS as a shell, and octadecylamine as a ligand, and was dispersed in toluene at a concentration of 3% by mass in the above toluene dispersion.

2. Production of Barrier Film (Barrier Member) As a support for the barrier film, a base film with both easy-adhesion layers (PET film, Toyobo Cosmo Shine A4300, thickness 50 μm) was used. A first organic layer and an inorganic layer were sequentially formed by the procedure.
Trimethylolpropane triacrylate (TMCTA manufactured by Daicel Cytec Co., Ltd.) and a photopolymerization initiator (ESACUREKTO 46 manufactured by Lamberti Co., Ltd.) were prepared, weighed so that the mass ratio was 95: 5, dissolved in methyl ethyl ketone, A coating solution having a concentration of 15% by mass was obtained. This coating solution was applied onto the PET film by a roll-to-roll using a die coater, and passed through a drying zone having an atmospheric temperature of 50 ° C. for 3 minutes. Thereafter, the sample was irradiated with ultraviolet rays (integrated irradiation amount: about 600 mJ / cm ² ) in a nitrogen atmosphere, cured by ultraviolet curing, and wound up. The thickness of the first organic layer formed on the support was 1 μm.

Next, an inorganic layer (silicon nitride layer) was formed on the surface of the first organic layer using a roll-to-roll CVD (Chemical Vapor Deposition) apparatus. Silane gas (flow rate 160 sccm), ammonia gas (flow rate 370 sccm), hydrogen gas (flow rate 590 sccm), and nitrogen gas (flow rate 240 sccm) were used as source gases. A high frequency power supply having a frequency of 13.56 MHz was used as the power supply. The film forming pressure was 40 Pa, and the reached thickness was 50 nm.
Thus, the barrier film 11 in which the inorganic layer was laminated on the surface of the first organic layer formed on the support was produced.

Furthermore, the barrier film 12 which has a 2nd organic layer on the surface of the inorganic layer of the barrier film 11 produced similarly to the above with the following procedures was produced.
The second organic layer weighed 5.0 parts by mass of a photopolymerization initiator (BASF Irg184) with respect to 95.0 parts by mass of urethane bond-containing acrylate polymer (Acrit 8BR930, manufactured by Taisei Fine Chemical Co., Ltd.). To obtain a coating solution having a solid content concentration of 15% by mass.
This coating solution was directly applied to the surface of the inorganic layer of the barrier film 11 by a roll toe roll using a die coater, and passed through a drying zone at an ambient temperature of 100 ° C. for 3 minutes. Thereafter, the barrier film 11 coated with the coating liquid and dried as described above is wound around a heat roller heated to a surface temperature of 60 ° C. and irradiated with ultraviolet rays (integrated irradiation amount of about 600 mJ / cm ² ) to be cured. Wound up. Thus, the thickness of the second organic layer formed on the inorganic layer of the barrier film 11 was 1 μm.
Thus, the barrier film 12 which has a 1st organic layer, an inorganic layer, and a 2nd organic layer in this order on the support body was produced.

3. Production of transfer material
By using the barrier film 12 with the second organic layer prepared in the above-described procedure as the first film and the barrier film 11 as the second film, the transfer material is obtained by the manufacturing process described with reference to FIGS. Obtained. Specifically, the first film and the second film are prepared, and the above-mentioned film is formed on the second organic layer surface of the first film (barrier film 12) while continuously conveying the film at a tension of 1 m / min and 60 N / m. The quantum dot-containing polymerizable composition A prepared in (1) was applied with a die coater to form a coating film having a thickness of 50 μm. Next, the first film (barrier film 12) on which the coating film is formed is wound around a backup roller, and the second film (barrier film 11) is laminated on the coating film so that the inorganic layer surface is in contact with the coating film. Then, while continuously conveying the coated film between the first film and the second film, the heated zone having an atmospheric temperature of 100 ° C. was passed for 3 minutes. Thereafter, using a 160 W / cm air-cooled metal halide lamp (manufactured by Eye Graphics Co., Ltd.), it was cured by irradiation with ultraviolet rays to form a wavelength conversion layer containing quantum dots. The irradiation amount of ultraviolet rays was 2000 mJ / cm ² . L1 was 50 mm, L2 was 1 mm, and L3 was 50 mm.
The coating film was cured by irradiation with the ultraviolet rays to form a cured layer (wavelength conversion layer), and a transfer material was produced. The thickness of the cured layer (wavelength conversion layer) formed by curing the quantum dot-containing polymerizable composition A was about 50 μm. Thus, the barrier film 12 and the barrier film 11 are provided on both surfaces of the wavelength conversion layer, respectively, and one surface of the wavelength conversion layer is adjacent to (in direct contact with) the inorganic layer of the barrier film 11, and the other surface is A transfer material 108 adjacent to the second organic layer of the barrier film 12 was obtained.

A plurality of the non-transfer materials of the comparative examples and the transfer materials of the examples are prepared, one is used for manufacturing the following liquid crystal display device, and the other is an evaluation sample for the following peelability evaluation and adhesion evaluation. Used as.

II. Examples and comparative examples of liquid crystal display devices

[Example 203]
When the product of ipad (registered trademark) 2 manufactured by Apple, which is a tablet PC, was disassembled, a prism sheet was adhered to the backlight side polarizing plate of the liquid crystal panel.
The barrier film A (temporary support) of the wavelength conversion member 103 is peeled off, and the exposed wavelength conversion member and the prism sheet attached to the backlight-side polarizing plate of the liquid crystal panel are bonded via an acrylic adhesive. Pasted.
A filter that transmits only blue light is disposed between the LED module attached to the reflector and the light guide plate. Therefore, blue light is emitted from the backlight unit and enters the liquid crystal panel.
Then, the liquid crystal display device 203 was obtained by assembling again.

[Examples 204 to 208]
In the same manner as the liquid crystal display device 203, liquid crystal display devices 204 to 208 were manufactured.

[Comparative Examples 201 and 202]
The prism sheet attached to the backlight side polarizing plate of the liquid crystal panel of the tablet type PC disassembled in the same manner as the production of the liquid crystal display device 203 and the organic layer of the barrier member A of the non-transfer materials 102 and 102 are acrylic. Affixed via a system adhesive.
Thereafter, the liquid crystal display devices 201 and 202 were obtained by reassembling.

III. Evaluation method 1. Evaluation of Peelability of Barrier Member A (Temporary Support) 90 ° peeling adhesive strength was measured for the barrier member A of the transfer materials 103 to 108 of the Examples by the method described in JIS Z 0237. The peelability of the barrier member A (temporary support) was evaluated from the measured value of the peel adhesive strength according to the following evaluation criteria.
A: 90 ° peel adhesive strength is 0.2 N / 10 mm or less.
B: 90 ° peel adhesion is greater than 0.2 N / 10 mm.

2. Evaluation of Adhesiveness of Barrier Member B A cross-cut test described in JIS K 5600 was performed on the barrier member B of the transfer materials 103 to 108 of the examples. Based on the number of test pieces remaining after the cross-cut test, the adhesion of the barrier member B was evaluated according to the following evaluation criteria. If the evaluation result is A, it can be determined that no peeling or partial peeling of the barrier member B occurs when the barrier member A (temporary support) is peeled off.
A: After the cross-cut test, 50 test pieces or more remained in 100 test pieces.
B: After the cross-cut test, only 49 test pieces or less remained in 100 test pieces.

3. Front luminance White was displayed on the liquid crystal display devices 201 to 208, the front luminance of the emitted light was measured with a measuring instrument (EZ-Contrast 160D, manufactured by ELDIM), and evaluated according to the following evaluation criteria.
A: The front brightness was 320 cd / m ² or more B The front brightness was 200 cd / m ² or more and less than 320 cd / m ² C The front brightness was less than 200 cd / m ² .

4). Confirmation of the uneven distribution region of particles The cross section obtained by cutting the uneven distribution of particles in the surface layer region of the wavelength conversion layer of the transfer material 104 to 106 with a microtome using a scanning electron microscope (JSMOL type JSM670) The number and coordinates of the particles were observed and measured, and quantified according to the above-described equation 2. The quantitative values of the transfer materials 104 to 106 were all Φ = 0.1. From this result, it was confirmed that particles were unevenly distributed in the surface layer region of the transfer material 104 to 106 on the barrier member A side of the wavelength conversion layer. It was also confirmed that particles were present as primary particles in the surface layer region.

FIG. 3 to FIG. 10 show the layer structures of the transfer materials of the examples described above and the non-transfer materials of the comparative examples, and the evaluation results.

As shown in FIGS. 3 to 8, the transfer materials of the examples all have a peelability evaluation result of the barrier member A (temporary support) of A, and the interface between the temporary support and the wavelength conversion member is easily peeled off. It was possible. Furthermore, it was also confirmed from the results shown in FIGS. 3 to 8 that the transfer materials of Examples have good adhesion between the wavelength conversion member and the barrier member B which is a barrier member that is not removed by transfer. The good adhesion between the barrier member B and the wavelength conversion member in this way means that the barrier member B is partially or entirely applied when a force for peeling the barrier member A, which is a temporary support, is applied. It is preferable for preventing peeling. By preventing such peeling from occurring, it is possible to prevent deterioration of the quantum dots contained in the wavelength conversion layer of the wavelength conversion member by the barrier member B even after the transfer.
For reference, when the peelability evaluation was similarly performed on the barrier member A of the non-transfer material 102 of the comparative example, the evaluation result was B, and when the adhesion evaluation was performed on the barrier member A of the non-transfer material 102, the evaluation result Was B.

In the liquid crystal display device of the example, after continuously irradiating blue light from the backlight for 1000 hours, the front luminance after the continuous irradiation was measured by the same method as described above. The front brightness was 90% or more of the front brightness. This is because the quantum dots contained in the wavelength conversion layer are protected by the barrier member A (temporary support) before being transferred to the liquid crystal panel, and the deterioration is suppressed by being protected by the liquid crystal panel after the transfer. The present inventors consider the result to show this. Moreover, since the barrier member A peeled off as the temporary support is not included in the liquid crystal display device of the example, the thickness of the liquid crystal display device is reduced by the thickness of the barrier member A.

Furthermore, the liquid crystal display device of the example showed higher front luminance than the liquid crystal display device of the comparative example (FIGS. 3 to 10). This is considered to be because the wavelength conversion layer containing the quantum dot which is a luminescent material is thicker than the liquid crystal display device of a comparative example. Although the wavelength conversion layer is thus thickened, the barrier member A is peeled off as a temporary support, so the total thickness of the liquid crystal panel with wavelength conversion layer is the same as in the comparative example. As described above, according to the present invention, the liquid crystal display device can be thinned without relying on the thinning of the wavelength conversion layer.

The present invention is useful in the field of manufacturing liquid crystal display devices.

Claims (15)

On the barrier member A which is a temporary support,
A wavelength conversion member having a wavelength conversion layer including a quantum dot that is excited by excitation light and emits fluorescence;
Barrier member B;
A transfer material having in this order. The transfer material according to claim 1, which is a transfer material for producing a liquid crystal panel. The transfer material according to claim 1, wherein the wavelength conversion member has an easily peelable surface on the barrier member A-side outermost surface. The wavelength conversion member has a particle uneven distribution region in which particles having a particle diameter of 100 nm or more are unevenly distributed in the barrier member A side surface region,
The transfer material according to claim 3, wherein the easy release surface is a surface of the particle unevenly distributed region. The wavelength conversion member has a particle uneven distribution region in which particles having a particle size of 500 nm or more are unevenly distributed in the barrier member A side surface region,
The transfer material according to claim 3, wherein the easy release surface is a surface of the particle unevenly distributed region. The transfer material according to claim 1 or 2, wherein the wavelength conversion member side outermost surface of the barrier member A is an easily peelable surface. The said barrier member A is a transfer material of Claim 6 whose said wavelength conversion member side outermost layer is a particle | grain containing layer, and the said particle | grain containing layer surface is the said easy peeling surface. The transfer material according to claim 1, wherein the barrier member A has an inorganic layer on the wavelength conversion member side outermost layer. The transfer material according to any one of claims 1 to 8, wherein the barrier member A has an easy adhesion layer. 10. The transfer material according to claim 1, wherein the barrier member B has an easy adhesion layer. The transfer material according to any one of claims 1 to 10, wherein each of the barrier member A and the barrier member B includes at least one layer selected from the group consisting of an inorganic layer and an organic layer. Peeling off the barrier member A of the transfer material according to any one of claims 1 to 11, and
Bonding the exposed surface exposed by peeling with the liquid crystal panel surface including at least the liquid crystal cell;
The manufacturing method of the liquid crystal panel with a wavelength conversion member containing this. The manufacturing method of the liquid crystal panel with a wavelength conversion member according to claim 12, wherein the exposed surface is bonded to a backlight side surface of the liquid crystal panel. The said liquid crystal panel is a manufacturing method of the liquid crystal panel with a wavelength conversion member of Claim 12 or 13 which has a visual recognition side polarizing plate and a backlight side polarizing plate across the said liquid crystal cell. A liquid crystal panel with a wavelength conversion member is produced by the method according to any one of claims 12 to 14, and
Assembling a liquid crystal display device by combining the manufactured liquid crystal panel and the backlight unit,
A method for manufacturing a liquid crystal display device, comprising:

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