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WO2024247895A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2024247895A1
WO2024247895A1 PCT/JP2024/019079 JP2024019079W WO2024247895A1 WO 2024247895 A1 WO2024247895 A1 WO 2024247895A1 JP 2024019079 W JP2024019079 W JP 2024019079W WO 2024247895 A1 WO2024247895 A1 WO 2024247895A1
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WO
WIPO (PCT)
Prior art keywords
group
layer
wavelength conversion
display device
light emitting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2024/019079
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English (en)
Japanese (ja)
Inventor
佳子 石丸
開 二俣
温紗 山岸
総平 門田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Holdings Inc
Original Assignee
Toppan Holdings Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toppan Holdings Inc filed Critical Toppan Holdings Inc
Priority to CN202480030267.7A priority Critical patent/CN121057966A/zh
Publication of WO2024247895A1 publication Critical patent/WO2024247895A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes

Definitions

  • the present invention relates to a display device.
  • Phosphors such as quantum dot phosphors emit light at a wavelength different from the wavelength of the excitation light when irradiated with the excitation light, and are therefore used, for example, as wavelength conversion materials.
  • a blue light-emitting diode and a quantum dot phosphor are used, and part of the blue light emitted by the blue light-emitting diode is converted into red light and green light by the phosphor (Patent Documents 1 to 3).
  • the objective of the present invention is to provide a display device that suppresses luminance degradation and is capable of displaying images with high color reproducibility even after long-term use.
  • a display device comprising: a substrate; a plurality of light emitting diodes arranged on the substrate and having equal emission spectra; and a plurality of filter sections including a red filter section, a green filter section, and a blue filter section, the plurality of filter sections including color filters facing the plurality of light emitting diodes, a first wavelength conversion section positioned between the red filter section and the light emitting diode facing it, and a second wavelength conversion section positioned between the green filter section and the light emitting diode facing it, each of the first wavelength conversion section and the second wavelength conversion section comprising: a wavelength conversion layer containing a Eu 2+ activated phosphor; a functional layer facing the plurality of light emitting diodes with the color filters and the wavelength conversion layer sandwiched therebetween, the functional layer including an ultraviolet shielding layer having an ultraviolet shielding rate of 85% or more in accordance with JIS L1925:2019; and a coloring layer interposed between the functional layer and the color
  • the wavelength conversion layer further includes a third wavelength conversion portion located between the blue filter portion and the light emitting diode facing the blue filter portion, and the third wavelength conversion portion contains a Eu2 + -activated phosphor.
  • a display device according to any of the above aspects, in which the plurality of light-emitting diodes are blue light-emitting diodes.
  • each of the coverage rate of the BT.2020 color gamut in the CIE1976 L * u * v * color system and the coverage rate of the BT.2020 color gamut in the CIE1976 u'v' color system is 90% or more
  • RY is a stimulus value Y in the CIE1931 color system of light incident on a surface of the red filter portion facing the light emitting diode
  • RY' is a stimulus value Y in the CIE1931 color system of light emitted from a surface of the red filter portion opposite to the surface facing the light emitting diode
  • GY is a stimulus value Y in the CIE1931 color system of light incident on a surface of the green filter portion facing the light emitting diode
  • the green filter portion is a stimulus value Y in the CIE1931 color system of light incident on the surface facing the light emitting diode.
  • GY' which is the stimulus value Y in the CIE 1931 color system of light emerging from a surface opposite to the surface facing the light emitting diode
  • BY which is the stimulus value Y in the CIE 1931 color system of light incident on the surface of the blue filter portion facing the light emitting diode
  • BY' which is the stimulus value Y in the CIE 1931 color system of light emerging from a surface of the blue filter portion opposite to the surface facing the light emitting diode satisfy the relationship shown in the following inequality (1).
  • the display device according to any one of the above aspects, wherein the Eu 2+ -activated phosphor contained in the wavelength conversion layer has a particle size in the range of 0.1 to 15 ⁇ m.
  • the colored layer further includes at least one of a second coloring material having a maximum absorption wavelength in the range of 470 to 530 nm and a half-width of an absorption spectrum in the range of 15 to 45 nm, and a third coloring material having a wavelength with the lowest transmittance in the wavelength range of 400 to 780 nm in the range of 650 to 780 nm.
  • the colored layer further contains one or more selected from the group consisting of a radical scavenger, a singlet oxygen quencher, and a peroxide decomposer.
  • the colored layer contains a polymer having a repeating unit shown in the following formula (i):
  • R 12 represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxy group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an hydroxy
  • the colored layer contains one or more compounds selected from the group consisting of dialkyldithiophosphates, dialkyldithiocarbanates, benzenedithiols, transition metal complexes thereof, and compounds represented by the following formula (ii):
  • R1 's each independently represent an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, or a group represented by R9CO- , R10SO2- , or R11NHCO-
  • R9 , R10 , and R11 each independently represent an alkyl group, an alkenyl group, an aryl group, or a heterocyclic group
  • R2 and R3 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkenyl group, an alkoxy group, or an alkenyloxy group
  • R4 to R8 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group.
  • the colored layer contains one or more compounds selected from the group consisting of compounds having any of a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetradiporphyrin structure, a pyrromethene structure, and an indigo structure, and metal complexes thereof.
  • a display device in which the functional layer functions as an anti-reflection layer or an anti-glare layer.
  • the functional layer further includes an antistatic layer or an antifouling layer facing the colored layer with the ultraviolet shielding layer sandwiched therebetween.
  • the present invention provides a display device that suppresses luminance degradation and is capable of displaying images with high color reproducibility even after long-term use.
  • FIG. 1 is a cross-sectional view of a display device according to a first embodiment of the present invention.
  • 2 is a graph showing the BT.2020 color gamut in the CIE 1976 L * u * v * color system.
  • FIG. 3 is a cross-sectional view of a display device according to a second embodiment of the present invention.
  • the substrate 21 includes an insulating substrate such as a glass substrate.
  • the substrate 21 may further include an undercoat layer provided on the main surface of the insulating substrate facing the black matrix substrate 3.
  • the undercoat layer is, for example, a laminate of a silicon nitride layer and a silicon oxide layer sequentially laminated on the insulating substrate.
  • the substrate 21 may be a semiconductor substrate such as a silicon substrate.
  • the substrate 21 may be either rigid or flexible.
  • the multi-layer wiring layer 22 is provided on the main surface of the substrate 21 facing the black matrix substrate 3.
  • the multi-layer wiring layer 22 includes a video signal line, a first power supply line, a second power supply line, a scanning signal line, a pixel circuit, and an interlayer insulating film.
  • the video signal lines each extend in the Y direction and are arranged in the X direction.
  • the scanning signal lines each extend in the X direction and are arranged in the Y direction.
  • the first and second power supply lines each extend in the Y direction and are arranged in the X direction in correspondence with the video signal lines.
  • the first and second power supply lines may each extend in the X direction and be arranged in the Y direction in correspondence with the scanning signal lines.
  • one of the first and second power supply lines may each extend in the Y direction and be arranged in the X direction in correspondence with the video signal lines, and the other of them may each extend in the X direction and be arranged in the Y direction in correspondence with the scanning signal lines.
  • the light-emitting diode 23 has a multi-layer structure.
  • the layer stacking direction of the layers included in the light-emitting diode 23 is the Z direction. This stacking direction may be perpendicular to the Z direction.
  • the light emitting diodes 23 have the same emission spectrum.
  • the light emitting diodes 23 emit short wavelength light, such as blue light and ultraviolet light.
  • the light emitting diodes 23 are blue light emitting diodes that emit blue light.
  • the light-emitting diodes 23 are arranged on the multi-layer wiring layer 22 in correspondence with the pixel circuits.
  • the anode of each of the light-emitting diodes 23 is connected to the drain of the drive control element, and the cathode is connected to the second power line.
  • the black matrix substrate 3 faces the dimmer 2A. Specifically, the black matrix substrate 3 faces the substrate 21 with the light emitting diodes 23 and the like sandwiched between them.
  • the black matrix substrate 3 includes a transparent substrate 31, a black matrix 32, a partition layer 34, a color filter 33 including a red filter portion 33R, a green filter portion 33G, and a blue filter portion 33B, and a wavelength conversion layer including a first wavelength conversion portion 36R, a second wavelength conversion portion 36G, and a filling portion 36B.
  • the transparent substrate 31 is transparent to visible light.
  • the transparent substrate 31 is, for example, a colorless substrate.
  • the transparent substrate 31 may have a single-layer structure or a multi-layer structure.
  • the transparent substrate 31 is made of, for example, glass, a transparent resin, or a combination thereof.
  • the transparent substrate 31 may be hard or flexible.
  • the transparent substrate 31 has a first main surface facing the dimming device 2A and a second main surface which is the rear surface of the first main surface.
  • the black matrix 32 is provided on the first main surface of the transparent substrate 31.
  • the black matrix 32 is a black layer that blocks visible light.
  • the black matrix 32 is made of, for example, a mixture containing a binder resin and a colorant.
  • the colorant is, for example, a black pigment, or a mixture of pigments that exhibit black color through subtractive color mixing, for example, a mixture containing a blue pigment, a green pigment, and a red pigment.
  • the black matrix 32 has first through holes at the positions of the light-emitting diodes 23.
  • the opening of each first through hole on the transparent substrate 31 side has a larger dimension in the direction perpendicular to the Z direction than the light-emitting diodes 23.
  • the red filter portion 33R, the green filter portion 33G, and the blue filter portion 33B form a stripe arrangement on the transparent substrate 31 on which the black matrix 32 is provided. These form a plurality of pixels, each of which is made up of the red filter portion 33R, the green filter portion 33G, and the blue filter portion 33B, and these pixels are arranged in the X direction and the Y direction.
  • the red filter portion 33R and the green filter portion 33G are a red colored layer and a green colored layer, respectively.
  • the blue filter portion 33B is a colorless light-transmitting layer or a blue colored layer.
  • Each of the red filter portions 33R fills one of the first through holes.
  • Each of the green filter portions 33G fills the other of the first through holes.
  • Each of the blue filter portions 33B fills yet another of the first through holes.
  • the partition layer 34 is provided on a color filter 33 consisting of a red filter portion 33R, a green filter portion 33G, and a blue filter portion 33B.
  • the partition layer 34 is transparent.
  • the partition layer 34 may be colored or colorless.
  • the partition layer 34 may have light scattering properties.
  • the partition layer 34 has second through holes at the positions of the first through holes.
  • the second through holes are provided such that the contour of the orthogonal projection of the opening on the transparent substrate 31 side onto the first main surface (hereinafter referred to as the second contour) surrounds the contour of the orthogonal projection of the first through hole onto the first main surface (hereinafter referred to as the first contour).
  • the second contour does not have to surround the first contour. In a structure in which the second contour surrounds the first contour, the effect of stray light on the display is smaller than in a structure in which the second contour does not surround the first contour.
  • the portion of the partition layer 34 that is sandwiched between adjacent second through holes has a rectangular cross-sectional shape. This portion may have a forward tapered cross-sectional shape, a reverse tapered cross-sectional shape, or another cross-sectional shape.
  • the partition layer 34 may have a multi-layer structure.
  • the partition layer 34 may include a resin layer and a reflective layer that at least partially covers the surface of the resin layer.
  • the reflective layer may have a single-layer structure or a multi-layer structure.
  • the layers contained in the reflective layer are, for example, a metal, an alloy, or a transparent dielectric.
  • the reflective layer made of a metal or an alloy is, for example, made of aluminum or an aluminum alloy.
  • the first wavelength conversion section 36R is provided on the red filter section 33R.
  • the first wavelength conversion section 36R is a layer including a Eu 2+ activated phosphor, which is an inorganic phosphor, and a transparent resin.
  • the first wavelength conversion section 36R converts the blue light emitted by the light emitting diode 23 into red light.
  • the Eu 2+ activated phosphor contained in the first wavelength conversion section 36R is, for example, SrCaAlSiN 3 :Eu, (Ba,Sr,Ca) 3 SiO 5 :Eu, (Ba,Sr,Ca) 2 (Si,Al) 5 N 8 :Eu, or (Ca,Sr)AlSi(O,N) 3 :Eu.
  • the transparent resin contained in the first wavelength conversion section 36R is, for example, a cured product of a silicone resin or an acrylic resin having a siloxane bond (Si-O-Si bond) in the main chain.
  • the second wavelength conversion section 36G is provided on the green filter section 33G.
  • the second wavelength conversion section 36G is a layer including a Eu 2+ activated phosphor, which is an inorganic phosphor, and a transparent resin.
  • the second wavelength conversion section 36G converts the blue light emitted by the light emitting diode 23 into green light.
  • the Eu 2+ activated phosphor contained in the second wavelength conversion section 36G is, for example, (Ba,Sr)Ga 2 S 4 :Eu, (Ba,Sr,Ca,Mg) 2 SiO 4 :Eu, SiAlON:Eu ( ⁇ -sialon), or (Ca,Sr) 8 Mg(SiO 4 ) 4 Cl 2 :Eu.
  • the transparent resin contained in the second wavelength conversion section 36G is, for example, the same as the transparent resin contained in the first wavelength conversion section 36R.
  • the filling section 36B is provided on the blue filter section 33B. As described above, here, the filling section 36B is a colorless and transparent layer. In this case, the filling section 36B is made of, for example, a transparent resin. The transparent resin contained in the filling section 36B is, for example, the same as the transparent resin contained in the first wavelength conversion section 36R.
  • the light emitting diode 23 is a blue light emitting diode that emits blue light.
  • the light emitting diode 23 is an ultraviolet light emitting diode that emits ultraviolet light, for example, a near-ultraviolet light emitting diode
  • the Eu 2+ activated phosphor contained in the first wavelength conversion section 36R and the Eu 2+ activated phosphor contained in the second wavelength conversion section 36G convert the ultraviolet light emitted by the light emitting diode 23 into red light and green light, respectively.
  • the filling section 36B is a third wavelength conversion layer that converts the ultraviolet light emitted by the light emitting diode 23 into blue light.
  • the filling portion 36B as the third wavelength conversion layer may further contain, in addition to the transparent resin, an Eu 2+ activated phosphor, which is an inorganic phosphor.
  • the Eu 2+ activated phosphor contained in the third wavelength conversion layer is, for example, (Sr,Ba,Ca,Mg) 10 (PO 4 ) 6 Cl 2 :Eu, BaMgAl 10 O 17 :Eu, Sr 10 (PO 4 ) 6 Cl 2 :Eu, or Ba 2 PO 4 Cl:Eu.
  • the particle diameter of the Eu 2+ -activated phosphor contained in each wavelength conversion layer is preferably in the range of 0.1 to 15 ⁇ m, more preferably in the range of 1 to 10 ⁇ m.
  • the particle diameter of the Eu 2+ -activated phosphor is defined as the particle diameter at an integrated value of 50% in the particle size distribution obtained by the photon correlation method, and is simply a value obtained by observing a predetermined range of the cross section of the wavelength conversion layer with a scanning microscope and arithmetic average value of the diameters of the phosphor particles confirmed.
  • the proportion of the Eu 2+ -activated phosphor in the total amount of the transparent resin and the Eu 2+ -activated phosphor is preferably in the range of 5 to 70 mass %, and more preferably in the range of 30 to 50 mass %.
  • the adhesive layer 4 is interposed between the dimming device 2A and the black matrix substrate 3, and bonds them to each other.
  • the adhesive layer 4 transmits the light emitted by the light-emitting diodes 23.
  • the adhesive layer 4 is, for example, a colorless and transparent layer.
  • the adhesive layer 4 is made of an adhesive or a pressure-sensitive adhesive.
  • the surface protection member 5 is provided on the front surface of the display panel DPA.
  • the surface protection member 5 is transparent to visible light and covers the front surface of the display panel DPA.
  • the surface protection member 5 is, for example, a film, sheet, or plate.
  • the surface protection member 5 includes an ultraviolet shielding layer 51, a colored layer 52, a first surface layer 53, and a second surface layer 54.
  • the colored layer 52, the ultraviolet shielding layer 51, the first surface layer 53, and the second surface layer 54 are laminated in this order.
  • the surface protection member 5 is disposed such that the ultraviolet shielding layer 51 faces the black matrix substrate 3 with the colored layer 52 sandwiched therebetween.
  • the ultraviolet ray shielding layer 51 is transparent to visible light and transmits visible light from the display panel DPA that has passed through the colored layer 52.
  • the ultraviolet ray shielding layer 51 has an ultraviolet ray shielding rate of 85% or more, preferably 90% or more, more preferably 95% or more, and may be 100%.
  • the ultraviolet ray shielding layer 51 prevents ultraviolet rays from outside the display device 1A from entering the colored layer 52, making it difficult for deterioration of the colored layer 52 caused by ultraviolet rays to occur.
  • the UV shielding rate is a value measured and calculated based on JIS L1925:2019, and is expressed as the value (%) obtained by subtracting the average transmittance (%) in the wavelength range of 290 to 400 nm from 100%.
  • the ultraviolet shielding layer 51 shown in FIG. 1 as the first embodiment also serves as a base material.
  • the thickness of the ultraviolet shielding layer 51 is not particularly limited, but is preferably within the range of 10 to 100 ⁇ m.
  • the thickness of each layer contained in the surface protection member 5 can be determined by observing a cross section parallel to the thickness direction of the surface protection member 5 with a microscope such as an electron microscope.
  • the ultraviolet shielding layer 51 contains a transparent material that has ultraviolet absorbing properties, or contains a transparent material that may or may not have ultraviolet absorbing properties and an ultraviolet absorbing agent.
  • the thickness of the colored layer 52 is preferably within the range of 0.5 to 10 ⁇ m. By making the colored layer 52 thicker, the effect of the coloring material described below on the smoothness of the colored layer 52 can be reduced, and the uniformity of the distribution of the coloring material in the colored layer 52 can be increased. In addition, a thin colored layer 52 is advantageous for making the display device 1A thinner.
  • the coloring layer 52 contains a first coloring material.
  • the coloring layer 52 can further contain at least one of a second coloring material and a third coloring material.
  • the coloring layer 52 contains all of the first coloring material, the second coloring material, and the third coloring material.
  • the colored layer 52 further contains a transparent material that dissolves or disperses the colorant.
  • the transparent material is, for example, a cured resin obtained by curing an active energy ray-curable resin, which will be described later.
  • the first colorant has a maximum absorption wavelength in the range of 560 to 620 nm, and a half-width of the absorption spectrum in the range of 15 to 55 nm.
  • the maximum absorption wavelength means the wavelength that gives the maximum of the maximum values of light absorptance in the light absorptance spectrum (absorption spectrum).
  • This maximum absorption wavelength is the wavelength that gives the smallest of the minimum values in the light transmittance spectrum. The same applies below for the maximum absorption wavelength.
  • the maximum absorption wavelength of the first coloring material is less than the lower limit, the green light emitted by the second wavelength conversion unit 36G is absorbed by the coloring layer 52 to a large extent, and the luminance efficiency of the green light emission decreases. If the maximum absorption wavelength of the first coloring material is greater than the upper limit, the red light emitted by the first wavelength conversion unit 36R is absorbed by the coloring layer 52 to a large extent, and the luminance efficiency of the red light emission decreases.
  • the second colorant has a maximum absorption wavelength in the range of 470 to 530 nm and a half-width of the absorption spectrum in the range of 15 to 45 nm.
  • the maximum absorption wavelength of the second coloring material is less than the lower limit, the blue light emitted by the filling section 36B is absorbed by the coloring layer 52 to a large extent, and the luminance efficiency of the blue light emission decreases. If the maximum absorption wavelength of the second coloring material is greater than the upper limit, the green light emitted by the second wavelength conversion section 36G is absorbed by the coloring layer 52 to a large extent, and the luminance efficiency of the green light emission decreases.
  • the half-width of the absorption spectrum of the second coloring material is less than the lower limit above, the effect of suppressing the reflection of external light will be reduced. If the half-width of the absorption spectrum of the second coloring material is greater than the upper limit above, the luminance efficiency will decrease.
  • the third coloring material has a wavelength in the range of 400 to 780 nm with the lowest transmittance in the range of 650 to 780 nm.
  • the half-width of the absorption spectrum of the third coloring material is, for example, in the range of 10 to 300 nm, but is not particularly limited.
  • the wavelength at which the third coloring material exhibits the lowest transmittance in the wavelength range of 400 to 780 nm is less than the above lower limit, the red light emitted by the first wavelength conversion unit 36R is absorbed by the colored layer 52 to a large extent, and the luminance efficiency of the red light emission decreases. If the wavelength at which the third coloring material exhibits the lowest transmittance in the wavelength range of 400 to 780 nm is greater than the above upper limit, the effect of suppressing reflection of external light is reduced.
  • the coloring layer 52 can contain, as at least one of the first coloring material, the second coloring material, and the third coloring material, one or more compounds selected from the group consisting of compounds having any of a porphyrin structure, a merocyanine structure, a phthalocyanine structure, an azo structure, a cyanine structure, a squarylium structure, a coumarin structure, a polyene structure, a quinone structure, a tetradiporphyrin structure, a pyrromethene structure, and an indigo structure, and metal complexes thereof.
  • These compounds or their metal complexes may be contained in the first coloring material, the second coloring material, the third coloring material, or two or more of these coloring materials.
  • coloring materials with wide half-widths or pigments without selective wavelength absorption may be used in combination, provided that they do not significantly affect the light emission.
  • An active energy ray curable resin is a resin that polymerizes and hardens when exposed to active energy rays such as ultraviolet rays or electron beams.
  • An active energy ray curable resin can contain, for example, a monofunctional, difunctional, or trifunctional or higher (meth)acrylate monomer, urethane (meth)acrylate, etc.
  • (meth)acrylate means both or either one of "acrylate” and "methacrylate.”
  • Examples of monofunctional (meth)acrylate compounds that can be incorporated into the active energy ray curable resin include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, t-butyl (meth)acrylate, glycidyl (meth)acrylate, acryloylmorpholine, N-vinylpyrrolidone, tetrahydrofurfuryl acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isobornyl (meth)acrylate, acrylate, isodecyl (meth)acrylate, lauryl (meth)acrylate, tridecyl (meth)acrylate, cetyl (meth)acrylate, stearyl (meth)acrylate, benzyl
  • tri(meth)acrylates such as trimethylolpropane tri(meth)acrylate, ethoxylated trimethylolpropane tri(meth)acrylate, propoxylated trimethylolpropane tri(meth)acrylate, tris-2-
  • Examples of such compounds include (meth)acrylate compounds, trifunctional or higher polyfunctional (meth)acrylate compounds such as pentaerythritol tetra(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, ditrimethylolpropane penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and ditrimethylolpropane hexa(meth)acrylate, as well as polyfunctional (meth)acrylate compounds in which a portion of these (meth)acrylates is substituted with an alkyl group or ⁇ -caprolactone.
  • polyfunctional (meth)acrylate compounds in which a portion of these (meth)acrylates is substituted with an alkyl group or ⁇ -caprolactone.
  • urethane (meth)acrylate As a resin that can be contained in the active energy ray curable resin, urethane (meth)acrylate can also be used.
  • a urethane (meth)acrylate is one obtained by reacting a product obtained by reacting a polyester polyol with an isocyanate monomer or prepolymer, with a (meth)acrylate monomer having a hydroxyl group.
  • urethane (meth)acrylates examples include pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate hexamethylene diisocyanate urethane prepolymer, pentaerythritol triacrylate toluene diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate toluene diisocyanate urethane prepolymer, pentaerythritol triacrylate isophorone diisocyanate urethane prepolymer, dipentaerythritol pentaacrylate isophorone diisocyanate urethane prepolymer, etc.
  • Monofunctional, bifunctional, trifunctional or higher functional (meth)acrylate monomers, urethane (meth)acrylates, etc. may be used alone or in combination of two or more kinds. They may also be partially polymerized oligomers.
  • the color layer forming composition and the color layer 52 may contain one or more of a radical scavenger, a singlet oxygen quencher, and a peroxide decomposer.
  • the radical scavenger captures the radicals that occur when the coloring material is oxidized and deteriorates, suppressing the auto-oxidation. Therefore, by including a radical scavenger in the coloring layer 52, it is possible to suppress the deterioration of the coloring material, i.e., to suppress the fading of the coloring layer 52.
  • the radical scavenger may be an additive or resin having an amine structure.
  • amine structure refers to a structure in which the hydrogen atom of ammonia is replaced with a hydrocarbon group or an aromatic atomic group. Examples of the amine structure include primary amines, secondary amines, and tertiary amines, and may also be quaternary ammonium cations.
  • a hindered amine light stabilizer with a molecular weight of 2000 or more is used as an additive having an amine structure as a radical scavenger, a high discoloration suppression effect can be obtained. If the molecular weight of the radical scavenger is low, it is likely to volatilize. Therefore, in this case, few molecules remain in the colored layer, making it difficult to obtain a sufficient discoloration suppression effect.
  • the molecular weight of the hindered amine light stabilizer is, for example, about 200,000, but there is no particular upper limit. In this specification, "molecular weight” means the “mass average molecular weight” measured by gel permeation chromatography (GPC) using polystyrene as a standard substance.
  • Additives having an amine structure that are suitable for use as radical scavengers include, for example, Chimassorb (registered trademark) 2020FDL, Chimassorb (registered trademark) 944FDL, and Tinuvin (registered trademark) 622 manufactured by BASF Corporation, and LA-63P manufactured by ADEKA Corporation.
  • the active energy ray curable resin, the colored layer forming composition, and the colored layer 52 preferably contain a polymer whose repeating unit contains the structure shown in the following formula (i) as at least a part of the radical scavenger.
  • R 12 represents a hydrogen atom, a halogen atom, a carboxyl group, a sulfo group, a cyano group, a hydroxy group, an alkyl group having 10 or less carbon atoms, an alkoxycarbonyl group having 10 or less carbon atoms, an alkylsulfonylaminocarbonyl group having 10 or less carbon atoms, an arylsulfonylaminocarbonyl group, an alkylsulfonyl group, an arylsulfonyl group, an acylaminosulfonyl group having 10 or less carbon atoms, an alkoxy group having 10 or less carbon atoms, an alkylthio group having 10 or less carbon atoms, an aryloxy group having 10 or less carbon atoms, a nitro group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an acyloxy group having 10 or less carbon atoms, an hydroxy
  • R 12 is preferably a hydrogen atom, a hydroxyl group, or an alkyl group having up to 10 carbon atoms.
  • the alkyl group preferably has 1 to 6 carbon atoms, and more preferably has 1 to 3 carbon atoms.
  • R 13 is preferably a hydrogen atom or an alkyl group having up to 10 carbon atoms.
  • the alkyl group preferably has 1 to 6 carbon atoms, and more preferably has 1 to 3 carbon atoms.
  • X is preferably a single bond or an aliphatic alkyl chain having 30 or less carbon atoms.
  • the number of carbon atoms in the aliphatic alkyl chain is preferably 10 or less, more preferably in the range of 1 to 6, and even more preferably in the range of 2 to 4.
  • Micronized pigment G-1 was prepared by the following method. That is, 100 parts of halogenated zinc phthalocyanine pigment C.I. Pigment Green 58 (DIC Corporation "FASTOGEN (registered trademark) GREEN A110"), 1200 parts of sodium chloride, and 120 parts of diethylene glycol were charged into a stainless steel 1 gallon kneader (Inoue Seisakusho Co., Ltd.) and kneaded at 70 ° C. for 6 hours. This kneaded product was added to 3000 parts of warm water, heated to 70 ° C. and stirred for 1 hour to form a slurry. Thereafter, filtration and water washing were repeated to remove sodium chloride and diethylene glycol, and the mixture was dried at 80 ° C. for one day and night. In this manner, micronized pigment G-1 was obtained.
  • binder resin solution was prepared by the following method. That is, 196 parts of cyclohexanone was charged into a reaction vessel made of a separable 4-neck flask equipped with a thermometer, a cooling tube, a nitrogen gas inlet tube, a dropping tube and a stirrer, and the temperature was raised to 80 ° C.
  • Photosensitive compositions PR-2, PR-3, PG-1, PG-2, PG-3, and PB-1 were prepared in the same manner as described above for photosensitive composition PR-1, except that the composition of materials was changed as shown in Table 1.
  • FDG007 Tetraazaporphyrin copper complex dye (manufactured by Yamada Chemical Industry Co., Ltd., "FDG007", maximum absorption wavelength 595 nm, half-width 22 nm)
  • M309 Trimethylolpropane triacrylate ("Aronix (registered trademark) M-309” manufactured by Toagosei Co., Ltd.)
  • M402 Dipentaerythritol hexaacrylate (“Aronix (registered trademark) M-402" manufactured by Toagosei Co., Ltd.)
  • OXE02 Ethanone, 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-, 1-(O-acetyloxime) (BASF Corporation, "IRGACURE (registered trademark) OXE02")
  • the display panel DPA-1 As the display panel DPA-1, the display panel DPA described with reference to FIG. 1 was manufactured.
  • the light control device 2A used had a light emitting diode 23 that emitted blue light with a wavelength of 450 nm.
  • the red filter portion 33R, the green filter portion 33G, and the blue filter portion 33B were formed using the photosensitive compositions PR-1, PG-1, and PB-1, respectively.
  • the red filter portion 33R, the green filter portion 33G, and the blue filter portion 33B were each formed by the following method. That is, the photosensitive composition was applied to the transparent substrate 31 on which the black matrix 32 was formed, using a spin coater, so that the thickness after curing was 2.5 ⁇ m. Next, this coating was exposed to ultraviolet light through a pattern mask, and the unexposed parts were removed by alkaline development. Thereafter, the coating was cured by heating at 230° C. for 15 minutes using a heating oven. By such a method, the red filter portion 33R, the green filter portion 33G, and the blue filter portion 33B were each formed.
  • the partition layer 34 was formed to a thickness of 30 ⁇ m.
  • the first wavelength-converting portion 36R was formed by curing a mixture of 30 parts of Eu 2+ -activated phosphor and 100 parts of silicone resin (manufactured by Shin-Etsu Chemical Co., Ltd.) As the Eu 2+ -activated phosphor, SrCaAlSiN 3 :Eu (particle diameter 5.4 nm) was used.
  • the second wavelength conversion section 36G a layer similar to that for the first wavelength conversion section 36R was formed, except that (Ba, Sr) Ga2S4 :Eu (particle diameter 4.6 ⁇ m) was used as the Eu2 + -activated phosphor instead of SrCaAlSiN3:Eu (particle diameter 5.4 nm).
  • the filling section 36B was a layer similar to that of the first wavelength-converting section 36R, except that the Eu 2+ -activated phosphor was omitted and the entire amount was silicone resin.
  • Display panel DPA-2 was prepared in the same manner as described above for display panel DPA-1, except for the following: instead of using photosensitive compositions PR-1 and PG-1, photosensitive compositions PR-2 and PG-2 were used, respectively.
  • Display panel DPA-2 was produced in the same manner as described above for display panel DPA-1, except for the following: instead of using photosensitive compositions PR-1 and PG-1, photosensitive compositions PR-3 and PG-3 were used, respectively.
  • TAC triacetyl cellulose film (manufactured by Fujifilm Corporation, TG60UL, thickness 60 ⁇ m, UV-shielding rate 92.9%) was used.
  • the colored layer 52 was formed by the following method. First, a colored layer forming composition CR1 having the composition shown in Table 2 below was prepared. Next, the colored layer forming composition CR1 was applied to one side of the ultraviolet shielding layer 51 so that the thickness after curing was 5.0 ⁇ m. This coating film was dried in an oven at 80° C. for 60 seconds. The dried coating film was irradiated with ultraviolet light at an exposure dose of 150 mJ/cm 2 using an ultraviolet irradiation device (manufactured by Fusion UV Systems Japan, light source H bulb) to cure the coating film. In this manner, the colored layer 52 was obtained.
  • an ultraviolet irradiation device manufactured by Fusion UV Systems Japan, light source H bulb
  • FDG-007 Tetraazaporphyrin copper complex dye (manufactured by Yamada Chemical Industry Co., Ltd., "FDG007", maximum absorption wavelength 595 nm, half-width 22 nm)
  • Dye-1 Dipyrromethene cobalt complex dye (maximum absorption wavelength 493 nm, half width 26 nm)
  • Dye-2 Phthalocyanine copper complex dye ("FDN002" manufactured by Yamada Chemical Industry Co., Ltd., minimum transmittance wavelength 780 nm in the range of 400 to 780 nm)
  • UA-306H Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., "UA-306H")
  • DPHA dipentaerythritol hexaacrylate
  • PETA pentaerythritol triacrylate
  • D1781 Bis(dibutyldithiocarbamate)nickel(II) ("D1781” manufactured by Tokyo Chemical Industry Co., Ltd.)
  • Tinuvin 479 Hydroxyphenyltriazine-based ultraviolet absorber ("Tinuvin 479” manufactured by BASF Japan Ltd.)
  • LA-36 Benzotriazole-based ultraviolet absorber ("ADEKA STAB LA-36" manufactured by ADEKA Corporation)
  • Omnirad TPO manufactured by IGM Resins B.V. (acylphosphine oxide photopolymerization initiator)
  • MEK methyl ethyl ketone
  • Resin RS1 was produced by the following method. That is, 2.4 g of 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate (Showa Denko Materials, FA-711MM), 5.6 g of methyl methacrylate (Kanto Chemical), 31 g of cyclohexanone (Kanto Chemical), and 0.11 g of 2,2'-azobis(isobutyronitrile) (FUJIFILM Wako Pure Chemical) were placed in a reaction vessel and heated at 70°C for 8 hours while stirring under a nitrogen gas atmosphere. Thereafter, the mixture was further heated at 100°C for 1 hour while stirring to obtain a polymer solution.
  • resin RS1 was obtained by copolymerizing 1,2,2,6,6-pentamethyl-4-piperidyl methacrylate and methyl methacrylate in a molar ratio of 15:85.
  • Dye-1 was produced by the following method. That is, 2.5 g of ethyl 5-formyl-2,4-dimethyl-1H-pyrrole-3-carboxylate was sealed in a reaction vessel and dissolved in 50 mL of methanol. 45 g of 47% hydrobromic acid was added to this solution and refluxed for 1 hour. The precipitated solid was filtered off to obtain 2.6 g of 3,3',5,5'-tetramethyl-4,4'-die-ethoxycarbonyl-2,2'-dipyrromethene hydrobromide.
  • a hard coat layer was formed as the first surface layer 53 on the surface of the ultraviolet shielding layer 51 opposite to the surface on which the colored layer 52 was formed.
  • This hard coat layer was formed in the same manner as described above for the colored layer 52, except that the hard coat layer forming composition HC1, the formulation of which is shown in Table 3 below, was used instead of the colored layer forming composition CR1.
  • UA-306H Pentaerythritol triacrylate hexamethylene diisocyanate urethane prepolymer (manufactured by Kyoeisha Chemical Co., Ltd., "UA-306H")
  • DPHA dipentaerythritol hexaacrylate
  • PETA pentaerythritol triacrylate
  • Omnirad TPO manufactured by IGM Resins B.V. (acylphosphine oxide photopolymerization initiator)
  • MEK methyl ethyl ketone
  • a low refractive index layer was formed as the second surface layer 54 on the first surface layer 53 by the following method.
  • Refractive index adjuster porous silica fine particles (average particle size 75 nm, solid content 20%) methyl isobutyl ketone dispersion 8.5 parts
  • Antifouling agent Optool (registered trademark) AR-110 (manufactured by Daikin Industries, Ltd., solid content 15%, solvent: methyl isobutyl ketone) 5.6 parts
  • Active energy ray curable resin pentaerythritol triacrylate (PETA) 0.4 parts
  • Photopolymerization initiator Omnirad TPO (manufactured by IGM Resins B.V.) 0.07 parts
  • Solvent methyl isobutyl ketone 83.73 parts
  • the composition LR for forming a low refractive index layer was applied onto the first surface layer 53 so that the thickness after curing was 100 nm.
  • This coating film was dried for 60 seconds in an oven at 80°C.
  • the dried coating film was irradiated with ultraviolet light at an exposure dose of 200 mJ/ cm2 using an ultraviolet irradiation device (manufactured by Fusion UV Systems Japan, light source H bulb) to cure the coating film.
  • an ultraviolet irradiation device manufactured by Fusion UV Systems Japan, light source H bulb
  • Example 1 The display device 1A described with reference to Fig. 1 was manufactured.
  • Example 1 as shown in Table 4 below, the above-mentioned display panel DPA-1 was used as the display panel DPA, and the above-mentioned surface protection member SWA1 was used as the surface protection member 5.
  • the display panel DPA and the surface protection member 5 were bonded together via an adhesive layer.
  • Comparative Examples 2 and 3 As shown in Table 5, display devices of Comparative Examples 2 and 3 were manufactured by a method similar to that described above for display device 1A of Example 1, except that surface protection members SWA8 and SWA9 were used instead of surface protection member SWA1, respectively.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)

Abstract

La présente invention concerne un dispositif d'affichage dans lequel une diminution de luminosité est supprimée et une image peut être affichée avec une reproductibilité de couleur élevée même après une longue période d'utilisation. Ce dispositif d'affichage (1A) comprend : une diode électroluminescente (23) ; un filtre coloré (33) qui comprend une partie filtre rouge (33R), une partie filtre vert (33G) et une partie filtre bleu (33B) ; une couche de conversion de longueur d'onde qui comprend une première partie de conversion de longueur d'onde (36R) et une seconde partie de conversion de longueur d'onde (36G), chaque unité de conversion de longueur d'onde contenant un luminophore activé Eu2+ ; une couche fonctionnelle qui fait face à la diode électroluminescente (23) avec le filtre coloré (33) et la couche de conversion de longueur d'onde interposée entre celles-ci et comprend une couche de protection contre les ultraviolets (51) ayant un taux de protection contre les ultraviolets conforme à JIS L1925:2019 de 85% ou plus ; et une couche colorée (52) qui est interposée entre la couche fonctionnelle et le filtre coloré (33) et comprend un premier matériau de couleur ayant une longueur d'onde d'absorption maximale dans la plage de 560 à 620 nm et une largeur de demi-valeur de spectre d'absorption dans la plage de 15 à 55 nm.
PCT/JP2024/019079 2023-05-26 2024-05-23 Dispositif d'affichage Pending WO2024247895A1 (fr)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055987A (ja) * 1991-01-17 1993-01-14 Toshiba Corp 感光性樹脂組成物およびこれを用いたカラ−フイルタ−の製造方法
JP2018523848A (ja) * 2015-07-23 2018-08-23 ソウル セミコンダクター カンパニー リミテッド ディスプレイ装置及びその製造方法
WO2021162115A1 (fr) * 2020-02-13 2021-08-19 富士フイルム株式会社 Stratifié, dispositif d'affichage et dispositif d'affichage électroluminescent organique
WO2022191318A1 (fr) * 2021-03-12 2022-09-15 凸版印刷株式会社 Film optique, dispositif d'affichage, et composition pour formation de couche colorée
WO2023282324A1 (fr) * 2021-07-07 2023-01-12 凸版印刷株式会社 Film optique et dispositif d'affichage
JP7207598B1 (ja) * 2022-07-20 2023-01-18 凸版印刷株式会社 光学フィルムおよび表示装置
JP2023054570A (ja) * 2021-10-04 2023-04-14 凸版印刷株式会社 表示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055987A (ja) * 1991-01-17 1993-01-14 Toshiba Corp 感光性樹脂組成物およびこれを用いたカラ−フイルタ−の製造方法
JP2018523848A (ja) * 2015-07-23 2018-08-23 ソウル セミコンダクター カンパニー リミテッド ディスプレイ装置及びその製造方法
WO2021162115A1 (fr) * 2020-02-13 2021-08-19 富士フイルム株式会社 Stratifié, dispositif d'affichage et dispositif d'affichage électroluminescent organique
WO2022191318A1 (fr) * 2021-03-12 2022-09-15 凸版印刷株式会社 Film optique, dispositif d'affichage, et composition pour formation de couche colorée
WO2023282324A1 (fr) * 2021-07-07 2023-01-12 凸版印刷株式会社 Film optique et dispositif d'affichage
JP2023054570A (ja) * 2021-10-04 2023-04-14 凸版印刷株式会社 表示装置
JP7207598B1 (ja) * 2022-07-20 2023-01-18 凸版印刷株式会社 光学フィルムおよび表示装置

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