JP6693137B2 - Decorative member, display device, and method for manufacturing organic electroluminescence display device - Google Patents

Description

  The present invention relates to a decorative member having a transparent transparent base material and a decorative portion arranged on the transparent base material, a display device using the decorative member, and a method for manufacturing an organic electroluminescence display device.

  In recent years, with the development of display devices, the demand for flat panel display devices such as liquid crystal display devices and organic electroluminescence display devices has increased. Recently, in addition to televisions and personal computers, multifunctional terminals such as smartphones and tablet terminals have become popular, and the market for flat panel display devices is expanding. Under such circumstances, research on each member constituting the flat panel display device has been actively conducted.

  The member constituting the flat panel display device can be obtained by, for example, laminating a predetermined functional layer on a glass substrate, and when such a member is used, it becomes a rigid flat panel display device. If the flat panel display device is rigid, it is difficult to bend the flat panel display device, for example, and its use is limited. Therefore, for example, a flexible display device using a member in which a predetermined functional layer is laminated on a transparent transparent substrate has been proposed.

  Since the flexible display device can be freely deformed, there is an advantage that, for example, a rollable (rollable) mobile display device can be realized, and a display device more suitable for mobile can be obtained. Further, the flexible display device has an advantage that it can be manufactured by a continuous process using a long film, for example, and is excellent in productivity.

By the way, in a current display device, a decoration member may be arranged on the front surface of a display panel. Such decorative members are often used, for example, in mobile phones such as smartphones having a touch panel function.
For example, Patent Document 1 discloses a decorative member in which a decorative portion 2'is arranged on a base material 3 ', as shown in FIG.

Patent No. 5392641

  As the applications of flexible display devices expand, the flexibility required for flexible display devices is increasing. Therefore, the front plate protection base material arranged on the surface of such a flexible display device is also required to have high flexibility to follow the flexible display device.

  By the way, a decorative portion can be arranged on the front plate protection base material in order to improve the appearance of the display device. Specifically, the decoration unit is a member for hiding the non-display area in the display device from the viewing side of the display device, and can mainly hide the wiring, the control circuit, and the like arranged in the non-display area. Therefore, the decorative portion is required to have a light-shielding property such that the wiring and the control circuit are not visually recognized from the viewing side of the display device.

  The present invention has been made in view of the above circumstances, and it is possible to suppress the occurrence of peeling or cracking of the decorative portion when bent, and to impart a desired light shielding property to the decorative portion. The main purpose is to provide a decorative member.

  The inventors of the present invention can suppress the occurrence of peeling or cracking of the decorative portion when the decorative member is bent, and can provide the decorative portion with a desired light shielding property. We researched the materials. As a result, in order to suppress the peeling and cracking of the decorative portion when the decorative member is bent (hereinafter, it may be assumed that the decorative portion has bending resistance), it is necessary to thin the decorative portion. I found that there is a need to try.

However, it has been found that it is difficult to achieve both the light-shielding property and the bending resistance of the decorative portion when the decorative portion is made thin while having the bending resistance.
Specifically, the decorating portion of the decorating member usually contains a coloring pigment exhibiting a predetermined color tone. Therefore, in order to impart a desired light-shielding property to the decorative portion, the content of the color pigment in the decorative portion needs to be a predetermined amount. Here, conventionally, since the content (concentration) of the color pigment in the decorative portion is not so high, the content of the main component (resin binder) for dispersing the color pigment is high, resulting in the thickness of the decorative portion. Had become thick.
On the other hand, if the desired light-shielding property is imparted to the decorative portion, and if the concentration of the color pigment in the decorative portion is increased in an attempt to reduce the film thickness, the content of the resin binder in the decorative portion decreases. For example, they have found a problem that peeling or cracking is likely to occur when the decorative portion is bent, that is, the bending resistance is deteriorated.

  The inventors of the present invention, as a result of intensive research to solve the above problems, thinning the decorative portion to the extent that peeling or cracking can be suppressed when the decorative member is bent. The present invention has been completed by finding out the content (pigment concentration) of the coloring pigment in the decorative portion that can achieve the desired light-shielding property.

  That is, the present invention is a decorative member having a transparent transparent base material and a decorative portion arranged on the transparent base material, wherein the decorative portion is a resin binder containing a photosensitive resin. It is a cured product containing a black pigment therein, and the pigment concentration of the black pigment with respect to the total solid content of the decorative portion is in the range of 45% by mass to 80% by mass, and the total light transmission of the decorative portion is performed. Provided is a decorative member having a rate of 0.02% or less.

  According to the present invention, since the pigment concentration of the black pigment contained in the decorative portion is within a predetermined range, the decorative portion can have a desired light-shielding property, and the decorative member can be used for a display device. When this happens, the decorative portion can hide the wiring and the like to obtain an excellent appearance. Further, when the decorative member is bent, it is possible to prevent the decorative portion from peeling or cracking.

  In the present invention, the decorative portion has a thickness in the range of 1.0 μm to 3.0 μm, and after performing a bending durability test with a bending radius of 3 mm 100,000 times or more, cracking or peeling of the decorative portion. Is preferred.

  Further, the present invention is a decorative member having a transparent base material having flexibility and a decorative part arranged on the transparent base material, wherein the decorative part has a thickness of 1.0 μm to 3 μm. Provided is a decorating member characterized by having a total light transmittance of 0.02% or less within a range of 0.0 μm.

  According to the present invention, since the thickness of the decorative portion is within the predetermined range, it is possible to suppress peeling or cracking of the decorative portion when the decorative member is bent. Further, since the decorative portion has a predetermined optical density, it can be a decorative portion having a desired light-shielding property, and when the decorative member is used in a display device, the decorative portion hides the wiring and the like. , You can get an excellent appearance.

  In the present invention, it is preferable that after the bending durability test with a bending radius of 3 mm is performed 100,000 times or more, there is no cracking or peeling of the decorative portion.

  In the present invention, a black matrix having a plurality of openings is provided on a display area defined by the decorative section on the same plane as the decorative section, and the black matrix is the decorative section. It is preferable to be composed of the same material as. The decorative portion and the black matrix can be formed at the same time.

  In the present invention, it is preferable that the opening has a colored portion. Since the decorating member and the color filter of the present invention can be integrated, the thickness of the display device can be reduced as compared with the case where the decorating member and the color filter are provided separately.

  In the present invention, it is preferable that a sensor electrode capable of detecting the position of the touch panel is provided on the black matrix. Since the decorating member and the sensor electrode of the present invention can be integrated, the thickness of the display device can be reduced as compared with the case where the decorating member and the sensor electrode base material are provided as separate bodies.

  In the present invention, it is preferable to have a circularly polarizing plate in the display area defined by the decorative portion. By providing the decorative member of the present invention with the circularly polarizing plate, a high-performance display device can be obtained.

  In the present invention, it is preferable that a black matrix having a plurality of openings is provided on the circularly polarizing plate, and a sensor electrode capable of detecting the position of the touch panel is provided on the black matrix.

  Further, the present invention provides a display device including the decorating member described above and a display panel.

  According to the present invention, when the display device is bent, it is possible to suppress the occurrence of peeling or cracking of the decorative portion. In addition, since the decorative portion has a predetermined light-shielding property, the decorative portion can hide the wiring and the like to obtain an excellent appearance.

Furthermore, the present invention is a decorative member preparation step of preparing a decorative member which is attached to a first glass substrate and has a decorative portion formed on the first transparent substrate; A sensor electrode base material laminating step of stacking a sensor electrode base material having a sensor electrode capable of detecting the position of a touch panel on a member, and an organic electroluminescent base material adhered onto a second glass base material. The organic electroluminescent substrate preparation step of preparing, and the sensor electrode substrate laminated on the decorative member, and a bonding step of bonding the organic electroluminescent substrate, the decorative member is A method for manufacturing an organic electroluminescent display device, which is the above-mentioned decorative member.
Hereinafter, organic electroluminescence may be abbreviated as organic EL.

  ADVANTAGE OF THE INVENTION According to this invention, the bonding member which sticks the decorating member and sensor electrode base material stuck on the 1st glass base material, and the organic EL base material stuck on the 2nd glass base material. By including the step, it is possible to suppress shrinkage of each base material due to heat or the like, and it is possible to perform highly accurate alignment. Further, by providing a sensor electrode base material laminating step of directly laminating the sensor electrode base material on the decorative member attached to the first glass base material, it is necessary to provide a support base material or the like on the sensor electrode base material. It becomes possible to reduce the thickness of the organic EL display device and realize high flexibility.

  INDUSTRIAL APPLICABILITY The present invention can suppress the occurrence of peeling or cracking of the decorative portion when bent, and can provide a decorative member capable of imparting desired light shielding properties to the decorative portion. Has the effect.

It is an outline top view and an outline sectional view showing an example of the decoration member of the present invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the decoration member of this invention. It is a schematic process drawing which shows the other example of the manufacturing method of the decoration member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic sectional drawing which shows the other example of the decorating member of this invention. It is a schematic plan view which shows an example of the display device of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the organic EL display device of this invention. It is a schematic sectional drawing which shows an example of the conventional decorating member.

  Hereinafter, the decorating member, the touch panel integrated decorating member, and the display device of the present invention will be described.

A. Decorative member The decorative member of the present invention is a decorative member having a transparent base material having flexibility and a decorative portion arranged on the transparent base material, wherein the decorative portion is photosensitive. It is a cured product containing a black pigment in a resin binder containing a resin, and the pigment concentration of the black pigment with respect to the total solid content of the decorative portion is in the range of 45% by mass to 80% by mass. The total light transmittance of the part is 0.02% or less.

  The decorating member of the present invention is a decorating member having a transparent base material having flexibility and a decorating portion arranged on the transparent base material, and the decorating portion has a thickness of 1 It is within the range of 0.0 μm to 3.0 μm, and the total light transmittance is 0.02% or less.

  The decorative member of the present invention will be described with reference to the drawings. FIG. 1A is a schematic plan view showing an example of the decorative member of the present invention, and FIG. 1B is a sectional view taken along line BB of FIG. 1A. As shown in FIGS. 1A and 1B, the decorating member 1 of the present invention includes a transparent base material 3 and a decorating portion 2 arranged on the transparent base material 3. The display area D is defined by the decoration unit 2.

According to the present invention, when the pigment concentration of the black pigment contained in the decorative portion is within the predetermined range, it is possible to achieve both the light-shielding property and the bending resistance in the decorative portion. Therefore, when the decorative member of the present invention is used in a display device, the decorative portion can hide the wiring, the control circuit, and the like, and an excellent appearance can be obtained. For example, the decorative portion is bent. It is possible to suppress the occurrence of peeling and cracking.
The reason for this is considered as follows.
First, the inventors of the present invention have found that it is necessary to reduce the thickness of the decorative portion of the decorative member in order to impart bending resistance when the decorative member is bent. Specifically, it has been found that by thinning the decorative portion, the decorative portion follows the transparent base material of the decorative member when the decorative member is bent.
However, it has been found that it is difficult to provide the decorative portion with a desired light-shielding property when the thickness of the decorative portion is reduced. That is, conventionally, the content (concentration) of the black pigment in the decorative portion is not so high. Therefore, when the concentration of the black pigment is significantly increased to improve the light-shielding property, the content of the main component (resin binder) for dispersing the black pigment also needs to be increased, and as a result, the decorative portion There is a problem that the thickness becomes thick. On the other hand, if only the concentration of the black pigment is increased, there is a problem that the content of the resin binder in the decorative portion is reduced and the flex resistance is reduced.
On the other hand, in the present invention, while maintaining the desired light-shielding property, the pigment concentration range of the black pigment that can thin the decorative portion to the extent that it can exhibit excellent bending resistance is newly discovered, The present invention has been completed. That is, in the present invention, since the pigment concentration of the black pigment is within the predetermined range, the decoration portion can hide the wiring, the control circuit, and the like, and an excellent appearance can be obtained, and the decoration member can be obtained. It is possible to suppress the peeling or cracking of the decorative portion from the transparent substrate when the is bent.

  Further, according to the present invention, since the thickness of the decorative portion is within a predetermined range, when the decorative member is bent, the peeling or cracking of the decorative portion from the transparent substrate is suppressed. be able to. Further, since the decorative portion has a predetermined optical density, it can be a decorative portion having a desired light-shielding property, and when the decorative member is used in a display device, the decorative portion hides the wiring and the like. , You can get an excellent appearance.

  Hereinafter, the decorating part and the transparent base material forming the decorating member of the present invention will be described.

1. Decoration part The decoration part in the present invention is a member arranged on a transparent substrate.
The decorative portion in the present invention has a pigment concentration of the black pigment with respect to the total solid content of the decorative portion in the range of 45% by mass to 80% by mass, and the total light transmittance of the decorative portion is 0.02% or less. It is characterized by (1st aspect). Further, the decorative portion in the present invention has a thickness within a range of 1.0 μm to 3.0 μm and a total light transmittance of 0.02% or less (second aspect).
Hereinafter, the decorative portion in the present invention will be described separately for the first aspect and the second aspect.

(1) First Aspect The decorative portion in the present aspect is a cured product in which a black pigment is contained in a resin binder containing a photosensitive resin, and the pigment concentration of the black pigment with respect to the total solid content of the decorative portion is 45. It is within a range of 80% by mass to 80% by mass, and has a total light transmittance of 0.02% or less.

  In this aspect, the black pigment with respect to the total solid content of the decorative portion is not particularly limited as long as it is in the range of 45% by mass to 80% by mass, but is preferably in the range of 45% by mass to 70% by mass. It is particularly preferable to be in the range of 47% by mass to 65% by mass. By setting the pigment concentration of the black pigment in this embodiment within the above range, it is possible to obtain a predetermined light-shielding property. In this aspect, for example, when the decoration member is used in the flexible display device, the wiring, the control circuit, and the like arranged on the outer peripheral portion of the display area in the flexible display device can be hidden by the decoration portion. Therefore, since the decorative portion has a predetermined light-shielding property, it is possible to suppress the loss of appearance due to the visibility of the wiring and the control circuit. Moreover, since the pigment concentration of the black pigment is within the above range, the content of the resin binder, which is the main component of the decorative portion, can be suppressed within a predetermined range, and thus the thickness of the decorative portion is increased. It is possible to suppress a decrease in bending resistance due to.

Here, the above-mentioned predetermined light-shielding property differs depending on the application of the decorating member of the present aspect, but may be, for example, such light-shielding property that the wiring of the display device, the control circuit, etc. can be hidden. preferable. Specifically, the total light transmittance of the decorative portion is preferably 0.02% or less, more preferably 0.01% or less, and particularly preferably 0.005% or less. preferable.
The total light transmittance of the decorative portion can be measured as follows. First, from the side where the decorative portion of the decorative member is formed, the light of the standard light source C by the International Commission on Illumination CIE is applied perpendicularly to the decorative member, and the transmitted light that has passed through the decorative member is indicated by a Yxy table. The value obtained by dividing the Y value (%) in the color system by 100 is the transmittance of the transmitted light. Next, only the transparent substrate is measured as a reference value, and the total light transmittance of the decorative portion is calculated from the measured value obtained here and the transmittance of the transmitted light.
In addition, the above-mentioned total light transmittance of the decorative portion in this aspect can be achieved when the pigment concentration of the black pigment contained in the decorative portion is within the above-described predetermined range.

Further, the optical density when the thickness of the decorative portion in the present embodiment is 1.5 μm is preferably 3.5 or more, more preferably 3.7 or more, and particularly 4.0 or more. Is preferred.
In addition, the optical density here means an optical density (OD) value. Further, the OD value represented by the optical density is specified by "log ₁₀ (I _in / I _out )" using the intensity I _{in of the} incident light that is vertically incident and the intensity I _{out of the} transmitted light that is vertically transmitted. , Microspectrophotometer (manufactured by Olympus Co., Ltd., OSP-SP200).
Further, the OD value of the decorative portion in this aspect can be achieved when the pigment concentration of the black pigment contained in the decorative portion is within the above-mentioned predetermined range.

The decorative portion in this aspect preferably has a predetermined flexibility. When the decorative member according to this aspect is used in a flexible display device, it can be freely bent, and peeling and cracking due to bending can be effectively suppressed. As the flexibility of the decorative portion, for example, in the bending durability test of the decorative member, after the bending test is performed 100,000 times or more at a bending radius of 3 mm, cracks in the decorative portion or a decorative portion from the decorative member. It is preferable that there is no peeling. Above all, it is preferable that after the bending test with a bending radius of 3 mm is performed 150,000 times or more, there is no cracking of the decorative portion or peeling of the decorative portion from the decorative member, and particularly 200,000 times or more with a bending radius of 3 mm. It is preferable that after the bending test, the decorative portion is not cracked or the decorative portion is not peeled off from the decorative member.
In addition, the above-mentioned bending endurance test can be measured under the conditions of a bending radius R = 3 mm, a rotation speed of 120 rpm, and a stroke of 20 mm using a DUMMLH-FU sheet-shaped body U-shaped repeating tester manufactured by Yuasa System Co., Ltd. Moreover, in this aspect, after the bending test was performed 100,000 times or more, the decorative portion was evaluated as having flexibility when there was no cracking of the decorative portion or peeling of the decorative portion from the decorative member.
Further, "there is no crack in the decorative portion" here means not only that there is no crack in the decorative portion, but in the case where the decorative member has a slight crack that does not cause any particular trouble. Also includes. Furthermore, "there is no peeling of the decorative portion from the decorative member" means not only that there is no peeling of the decorative portion from the decorative member, but in the use of the decorative member, no particular problem occurs. It also includes the case where there is slight peeling.

The thickness of the decorative portion in this aspect may be such that the above-described pigment concentration of the black pigment can be realized, and it is preferable that the decorative portion exhibits a predetermined flexibility. The specific thickness of the decorative portion is, for example, preferably in the range of 1.0 μm to 3.0 μm, more preferably in the range of 1.0 μm to 2.5 μm, and particularly preferably 1.0 μm to It is preferably within the range of 2.0 μm. When the thickness of the decorative portion is within the above range, when the decorative member of this aspect is used in a flexible display device, it can be freely bent, and the occurrence of peeling or cracking due to bending is effective. Can be effectively suppressed.
Furthermore, in order to achieve the thickness within the above range while the decorative portion in the present aspect exhibits the desired light-shielding property, for example, the pigment concentration of the black pigment contained in the decorative portion is set within the predetermined range described above. It is preferable to adjust.

  The black pigment in this embodiment is preferably a pigment exhibiting a black color. The term "black" as used herein means, in addition to non-tinted black, for example, bluish black, greenish black, reddish black, brownish black, orangeish black, or whitish black. Can be any color. Examples of such black pigments include titanium black (low order titanium oxide, titanium oxynitride, etc.), carbon black, and the like. Titanium black has the same concentration and the same film thickness as carbon black, and has a higher light-shielding property against visible light. Therefore, when titanium black is used, it is possible to reduce the thickness of the decorative portion with the same light-shielding property as compared with the case where carbon black is used. In addition, as the black pigment in this embodiment, only one kind of black pigment may be used, or two or more kinds of black pigment may be mixed and used. Further, the black pigment may be mixed with other colored pigments.

  Examples of the photosensitive resin in this embodiment include materials generally used for the decorative portion. Specifically, for example, one kind of a photosensitive resin having a photoreactive group such as a reactive vinyl group such as an acrylic resin, an epoxy resin, a polyimide resin, a polyvinyl cinnamate resin, a cyclized rubber, etc. The above can be used. In the acrylic resin, for example, a photosensitive resin including an alkali-soluble resin, a polyfunctional acrylate monomer, a photopolymerization initiator, and other additives can be used as the resin component of the resin binder.

As the alkali-soluble resin, one or more kinds of methacrylic acid ester copolymers such as benzyl methacrylate-methacrylic acid copolymers and cardo resins such as epoxy acrylate having a bisphenolfluorene structure can be used. As the polyfunctional acrylate-based monomer, for example, one or more kinds of trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, etc. are used. be able to.
In addition, in this invention, (meth) acrylate means that it is either a methacrylate or an acrylate.

  As the photopolymerization initiator, one or more known ones such as alkylphenone type, oxime ester type, triazine type and titanate type can be used. For example, in the alkylphenone series, 2-methyl-1 [4- (methylthio) phenyl] -2-morpholinopropan-1-one (Irgacure (registered trademark) 907, manufactured by BASF Japan Ltd.), 2-benzyl- 2-dimethylamino-1- (4-monofoliophenyl) butanone-1 (Irgacure (registered trademark) 369, manufactured by BASF Japan Ltd.), and oxime ester-based 1,2-octanedione, 1- [4- ( Phenylthio) phenyl]-, 2- (O-benzoyloxime) (Irgacure (registered trademark) OXE01, manufactured by BASF Japan Ltd.) and the like can be used.

  The resin binder in this embodiment may include various known additives such as a photosensitizer, a dispersant, a surfactant, a stabilizer, and a leveling agent, in addition to the materials described above.

  As described above, the decorative portion in this embodiment is a cured product in which the resin binder containing the photosensitive resin contains the black pigment. The "cured product" here is not limited to a cured product of only a photopolymerizable compound, and may be used as, for example, a dispersant, a surfactant, or an alkali-soluble resin blended for alkali developability. A non-photopolymerizable polymer, a non-photopolymerizable compound, or the like is a cured product that can usually contain such compounds.

The method for forming the decorative portion in this aspect is not particularly limited as long as it is a method capable of forming a desired decorative portion. For example, a so-called photolithography method in which a black photosensitive resin composition containing a black pigment and an uncured product of a photosensitive resin is applied on a transparent substrate described below and then exposed and developed in a predetermined pattern Can be mentioned. The decorative portion formed by the photolithography method can be thinner than the decorative portion formed by the screen printing method. In addition, the decorative portion can be formed with higher linearity as compared with the gravure printing method.
Examples of the coating method for coating the black photosensitive resin composition on the transparent substrate include known methods such as spin coating, roll coating, die coating, spray coating and bead coating. ..

(2) Second Aspect The decorative portion in this aspect is a member having a thickness in the range of 1.0 μm to 3.0 μm and a total light transmittance of 0.02% or less.

  The thickness of the decorative portion in this embodiment is, for example, preferably in the range of 1.0 μm to 3.0 μm, particularly preferably in the range of 1.0 μm to 2.5 μm, and particularly preferably 1.0 μm to It is preferably within the range of 2.0 μm. When the thickness of the decorative portion is within the above range, when the decorative member of this aspect is used in a flexible display device, it can be freely bent, and the occurrence of peeling or cracking due to bending is effective. Can be effectively suppressed.

The decorative portion in this aspect achieves the above-mentioned thickness and has a predetermined light shielding property. Here, the above-mentioned predetermined light-shielding property differs depending on the application of the decorating member of the present aspect, but may be, for example, such light-shielding property that the wiring of the display device, the control circuit, etc. can be hidden. preferable. Specifically, the total light transmittance of the decorative portion is preferably 0.02% or less, more preferably 0.01% or less, and particularly preferably 0.005% or less. preferable.
The total light transmittance of the decorative portion can be measured by the same method as the total light transmittance of the decorative portion described in the above-mentioned "(1) First aspect", and therefore, here The description is omitted.

  The decorative portion in this aspect is characterized by having the above-mentioned thickness and total light transmittance, but in order to obtain a decorative portion that satisfies such conditions, for example, the pigment concentration of the black pigment in the decorative portion Is preferably within a predetermined range. Specifically, the black pigment with respect to the total solid content of the decorative portion is not particularly limited as long as it is in the range of 45% by mass to 80% by mass, but is preferably in the range of 45% by mass to 70% by mass. It is particularly preferable to be in the range of 47% by mass to 65% by mass. In this aspect, the effect when the pigment concentration of the black pigment with respect to the total solid content of the decorative portion is within the above range can be the same as in “(1) First aspect”. The description in is omitted.

  Further, the OD value, the flexibility, the material, the forming method, and the like of the decorative portion in this aspect can be the same as those in the above “(1) First aspect”, and thus the description thereof is omitted here.

2. Transparent Substrate The transparent substrate in the present invention is a member having flexibility and is a member that supports the above-described decorative portion.

  Here, unless otherwise specified, the term “transparent” means being transparent to the extent that it does not hinder the operator's visual confirmation from the operation surface of the display device using the decorative member of the present invention. Therefore, "transparent" includes colorless and transparent, and colored transparent to the extent that visibility is not hindered, and is not defined by strict transmittance, and the degree of transparency is determined according to the application of the decorative member of the present invention. You can decide.

  The transparent substrate in the present invention is not particularly limited as long as it is a member having flexibility. Here, having flexibility can be confirmed by performing a bending resistance test. For example, it can be confirmed by measuring using a DLMMLH-FU planar body U-shaped repeating tester manufactured by Yuasa System Co., Ltd. under the conditions of a bending radius R = 3 mm, a rotation speed of 120 rpm / min, and a stroke of 20 mm.

  The material forming the transparent substrate in the present invention is preferably a material capable of imparting predetermined flexibility. Examples thereof include polyimide (PI), polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), acrylic resins, polycarbonate resins, cycloolefin resins and the like. A glass base material can also be used depending on the thickness. In the present invention, PI is preferably used from the viewpoint of flexibility and heat resistance.

  The thickness of the transparent base material in the present invention is preferably a thickness having a predetermined flexibility and a rigidity enough to function as a decorating member. The specific thickness of the transparent substrate is preferably in the range of 20 μm to 100 μm, more preferably in the range of 20 μm to 85 μm, and particularly preferably in the range of 30 μm to 60 μm.

  As the transparent substrate in the present invention, a commercially available product may be prepared, but a desired transparent substrate may be formed, for example, by applying a predetermined resin composition on a glass substrate. Examples of the coating method for coating the resin composition on the glass substrate include known methods such as spin coating, roll coating, die coating, spray coating, and bead coating.

3. Black Matrix In the present invention, a black matrix having a plurality of openings may be provided on the same plane as the decorative portion and in the display area defined by the decorative portion. Specifically, as shown in FIG. 2, a black matrix 4 having an opening is provided on a display area D defined by the decorative portion 2 on the same plane as the decorative portion 2 on the transparent substrate 3. You can do it.

The material of the black matrix is preferably the same as the material of the decorative portion described above. This is because the black matrix can be formed at the same time when the decorative portion is formed, and it is not necessary to separately provide a forming process for forming the black matrix. That is, the black matrix can be formed without increasing the number of steps.
The black matrix is usually formed by photolithography. Further, it is preferable that the decorative portion is also formed by the photolithography method from the viewpoint of reducing the film thickness. Thus, both the black matrix and the decorative portion can be formed by the photolithography method, and therefore it is preferable to form them simultaneously.
Note that the specific material of the black matrix can be the same as the above-mentioned material of the decorative portion, and thus the description thereof is omitted here.

  The black matrix in the present invention has a plurality of openings. The shape of the opening can be appropriately adjusted according to the design of the display device in which the decorating member of the present invention is used, and examples thereof include a triangular shape, a quadrangular shape, a rhombic shape, and a hexagonal shape.

  The thickness of the black matrix is preferably such that it can exhibit the function of the black matrix. Especially, it is preferable that it is the same as the thickness of the decorative portion. This is because it can be formed at the same time as the decorative portion. The specific thickness of the black matrix can be the same as the thickness of the decorative portion described above, and thus the description thereof is omitted here.

  Further, the size, the number, the pitch, and the like of the plurality of openings arranged in the black matrix can be appropriately adjusted according to the design of the display device in which the decorating member of the present invention is used, and thus the description here. Is omitted.

  As a method of forming a black matrix, the same forming method as that of a black matrix used in a general display device can be used. For example, a method of forming a black matrix layer by a sputtering method, a vacuum vapor deposition method, a coating method or the like and patterning the black matrix layer by a photolithography method can be mentioned. Therefore, when forming the black matrix and the decorative portion at the same time, a layer made of the constituent material of the decorative portion and the black matrix is formed on the transparent substrate, and then the layer is patterned by the photolithography method. It is possible to form the decorative portion and the black matrix.

4. Colored Part In the present invention, the opening part of the black matrix may have a colored part. That is, the colored portion is a patterned member arranged in the opening of the black matrix. Specifically, as shown in FIG. 3, a colored portion 5 (here, a red colored portion 5R, a green colored portion 5G, and a blue colored portion 5B) may be provided in the opening of the black matrix 4.

  The colored portion has, for example, three colored portions of red, green, and blue. The color of the colored portion may be any color containing at least three colors of red, green and blue. For example, three colors of red, green and blue, four colors of red, green, blue and yellow, or red, It is also possible to use five colors such as green, blue, yellow, and cyan.

As the colored portion, for example, a coloring material dispersed in a binder resin can be used.
Examples of the coloring material used in the colored portion include pigments and dyes of each color. Examples of the coloring material used in the red colored layer include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Examples of the coloring material used in the green colored layer include phthalocyanine-based pigments such as halogen poly-substituted phthalocyanine pigments or halogen poly-substituted copper phthalocyanine pigments, triphenylmethane-based basic dyes, isoindoline-based pigments, isoindolin. Examples thereof include linone-based pigments. Furthermore, examples of the coloring material used in the blue colored layer include a copper phthalocyanine pigment, an anthraquinone pigment, an indanthrene pigment, an indophenol pigment, a cyanine pigment, and a dioxazine pigment. These pigments and dyes may be used alone or in combination of two or more. Examples of the binder resin used in the colored portion include a photosensitive resin having a reactive vinyl group such as an acrylate type, a methacrylate type, a polyvinyl cinnamate type, or a cyclized rubber type.

  In the colored portion, in addition to the above-mentioned materials, if necessary, a photopolymerization initiator, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. Can be included.

  Further, on the same plane where the colored portion is formed, a white layer containing no binder and containing a binder resin may be formed.

  The arrangement of the colored portions is not particularly limited, and may be a known arrangement such as a stripe type, a mosaic type, a triangle type, and a 4-pixel arrangement type.

  The thickness of the colored portion can be the same as the film thickness of a general colored portion in the color filter, and can be set within a range of 1 μm to 5 μm, for example.

  Examples of the method for forming the patterned colored portion in the opening of the black matrix include a photolithography method, an inkjet method, a printing method, and the like.

5. Sensor Electrode In the present invention, a sensor electrode capable of detecting the position of the touch panel may be provided on the black matrix.

  In the present invention, a sensor electrode capable of detecting the position of the touch panel may be used, and a sensor electrode used in a general touch panel can be used. In general, the sensor electrode according to the present invention preferably has a mesh-shaped first electrode and second electrode. Specifically, as shown in FIG. 4, the black matrix 4 may have a first electrode 6a and a second electrode 6b. In addition, in FIG. 4, the first electrodes 6a and the second electrodes 6b are alternately arranged on the adjacent black matrix 4, and the first electrodes 6a and the second electrodes 6b are provided between the first electrodes 6a and the second electrodes 6b. An example is shown in which the insulating layer 7 for electrically insulating the two electrodes 6b is arranged, and the protective layer 8 is arranged on the second electrode 6b.

  The planar shape and the planar outer shape of the mesh-shaped first electrode and the second electrode in the sensor electrode are, for example, Japanese Patent No. 4610416, JP 2010-286886 A, JP 2004-192093 A, JP 2010 A. Since it can be the same as the sensor electrode used in a general touch panel as shown in JP-A-277392 and JP-A-2011-129501, the description thereof is omitted here.

  Examples of the material used for the sensor electrode include simple substances of silver, gold, chromium, platinum, and aluminum, and alloys mainly containing any of these. As the metal alloy, an alloy of silver, palladium, and copper called APC is generally used. Further, as the metal composite, a three-layer structure of molybdenum, aluminum, molybdenum referred to as MAM or the like can be applied. Further, a conductive polymer obtained by adding the above metal to a resin material such as PEDOT can also be used.

  The sensor electrode in the present invention is preferably arranged on the above-mentioned black matrix. Therefore, the line width of the sensor electrode can be appropriately adjusted according to the line width of the black matrix, but is preferably equal to or less than the line width of the black matrix. The specific line width of the sensor electrode is, for example, preferably in the range of 1.0 μm to 28 μm, particularly preferably in the range of 1.5 μm to 23 μm, and particularly preferably in the range of 2.0 μm to 20 μm. It is preferably within. When the line width of the sensor electrode is within the above range, the sensor electrode can be favorably arranged on the black matrix, and when the decorative member of the present invention is used in the display device, the visibility of the display device is improved. The effect of can be suppressed. Further, peeling or cracking of the sensor electrode when the decorative member of the present invention is bent can be effectively suppressed.

  In addition, the thickness of the sensor electrode is preferably a thickness at which the conductivity can be exhibited to the extent that the position of the touch panel can be detected. The thickness of the sensor electrode is, for example, preferably in the range of 10 nm to 1000 nm, more preferably in the range of 50 nm to 800 nm, and particularly preferably in the range of 100 nm to 200 nm. When the thickness of the sensor electrode is within the above range, peeling or cracking of the sensor electrode when the decorative member of the present invention is bent can be effectively suppressed.

  As a method of forming the sensor electrode, for example, a method capable of forming a mesh-shaped first electrode and second electrode is preferable. Specifically, there is a method of forming a conductive layer using a conductive material forming a sensor electrode, then forming a resist pattern on the conductive layer, and etching the conductive layer using the resist pattern as a mask. Be done. At this time, as a method of forming the conductive layer, for example, a dry process such as a vacuum vapor deposition method, a sputtering method, a CVD method, an ion plating method can be used.

6. Circular Polarizing Plate In the present invention, a circularly polarizing plate may be provided in the display area defined by the decorative portion. Specifically, as shown in FIG. 5, a circular polarizing plate 9 may be provided in the display area D defined by the decorative portion 2. In this case, the opening of the decorative portion 2 is flattened. The layer 11 can be arranged. In the present invention, since the thickness of the decorative portion can be reduced, the circularly polarizing plate can be arranged on the decorative member via the adhesive layer.

  The circularly polarizing plate in the present invention may be the same as that used in a general display device, and may have, for example, a polarizing plate or various retardation layers.

  The polarizing plate used for the circularly polarizing plate, for example, decomposes transmitted light into two polarization components that are orthogonal to each other, transmits a polarization component in one direction (direction parallel to the transmission axis), and is orthogonal to the one direction. The polarized component in the other direction (direction parallel to the absorption axis) can be absorbed. Such a polarizing plate can be formed by adsorbing and orienting iodine compound molecules on a film material made of polyvinyl alcohol (PVA).

  Examples of the retardation layer include a retardation layer having an in-plane retardation value of λ / 4, a retardation layer having an in-plane retardation value of λ / 2, and a positive C plate (+ C plate). ) Is included. The combination and configuration of the retardation layers can be appropriately adjusted according to the application of the decorative member of the present invention, and are not particularly limited.

7. Other members The decorative member of the present invention only needs to have the transparent base material and the decorative portion described above, and may have other members as necessary. Examples of other members include a flattening layer, an adhesive layer, an insulating layer, a protective layer, and an antireflection layer.

(1) Flattening Layer The flattening layer in the present invention can be arranged on the transparent substrate in a region where the decorative portion is not formed, that is, in the opening of the decorative portion. By disposing the flattening layer, it is possible to easily install the decorative member when the decorative member of the present invention is used in a flexible display device.

  As the material forming the planarizing layer in the present invention, it is preferable to use a material having a predetermined light-transmitting property and having a predetermined flexibility like the decorative portion. Specifically, a resin material can be used. The resin material used for the flattening layer can be the same as the resin material used for the transparent base material described above, and thus the description thereof is omitted here.

  The thickness of the flattening layer is preferably such that the above-described effects of providing the flattening layer can be obtained. Specifically, it is preferable that the thickness is equal to or smaller than the thickness of the decorative portion described above.

(2) Adhesive Layer The adhesive layer in the present invention can be arranged on the transparent substrate in a region where the decorative portion is not formed, that is, in the opening of the decorative portion. By disposing the adhesive layer, the decorative member can be easily attached when the decorative member of the present invention is used in a flexible display device.

  As a material forming the adhesive layer in the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility like the decorative portion. Specifically, a general material such as a photocurable resin or a thermosetting resin can be used.

  The thickness of the adhesive layer is preferably such that the decorative member of the present invention can be attached to a flexible display device. Specifically, it is preferable that the thickness is equal to or thicker than the above-mentioned decorative portion.

(3) Insulating Layer The insulating layer according to the present invention includes a first electrode 6a and a second electrode 6b when the sensor electrode 6 has a mesh-shaped first electrode 6a and a second electrode 6b, as shown by reference numeral 7 in FIG. It can be used when electrically insulating the second electrode 6b.

  The material of the insulating layer in the present invention is preferably a material having a desired insulating property, and those generally used for touch panels can be used. Specifically, a light-transmissive acrylic resin, siloxane resin and the like can be mentioned.

  The thickness of the insulating layer is preferably, for example, a thickness that can electrically insulate between the first electrode and the second electrode and prevent a short circuit. The specific thickness of the insulating layer can be the same as the thickness of the insulating layer used in a general touch panel, and can be, for example, in the range of 0.5 μm to 3 μm.

(4) Protective Layer The protective layer in the present invention can be arranged on the surface of the transparent base material on which the decorative portion is formed so as to cover the decorative portion and the opening. For example, as shown by reference numeral 8 in FIG. 4, when the sensor electrode 6 has the mesh-shaped first electrode 6a and the second electrode 6b, it can be arranged so as to cover the second electrode 6b. By disposing the protective layer, it becomes possible to enhance the protective function of the decorative member of the present invention.

  As a material forming the protective layer in the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility. For example, a resin material that can be used for a general protective layer is mentioned, and among them, a resin material having heat resistance and scratch resistance is preferable. Specific examples include epoxy resin, acrylic resin, and polyimide resin.

  The thickness of the protective layer is preferably such that the protective function of the protective layer can be exhibited and the flexibility of the decorative member of the present invention is not impaired. Specifically, it is preferably within the range of 1 μm to 5 μm, for example.

(5) Antireflection Layer The antireflection layer in the present invention can be arranged on the surface of the transparent substrate on the side where the decorative portion is formed so as to cover the decorative portion and the opening. By disposing the antireflection layer, reflection of external light on the surface of the decorative member of the present invention can be suppressed, and visibility can be improved.

  As the material forming the antireflection layer of the present invention, it is preferable to use a material having a predetermined light transmittance and a predetermined flexibility. Specific examples thereof include materials that can be used for a general antireflection layer, so description thereof will be omitted here.

  The thickness of the antireflection layer is preferably such that the antireflection function as the antireflection layer can be exhibited and the flexibility of the decorative member of the present invention is not impaired. Note that the specific thickness of the antireflection layer can be appropriately adjusted according to the material forming the antireflection layer, and thus the description thereof is omitted here.

(6) Infrared Transmission Window In the present invention, the decoration portion may form an infrared transmission window. The infrared transmission window is a portion that blocks visible light and transmits infrared light, and functions when the decorative member of the present invention is used for a mobile phone having a touch panel function such as a smartphone. Specifically, when a mobile phone with a touch panel function is put on your ear during a call, in order to prevent malfunction of the touch panel, or to turn off the display on the display panel to extend battery life, A human sensor for detecting the approach of human skin can be preferably used, and the infrared transmission window functions as the human sensor.

  When the infrared transmitting window is formed by the decorative portion, infrared transmission is performed between the transparent base material and the decorative portion having the infrared transmitting window, or so as to cover the infrared transmitting window formed in the decorative portion. The layers are arranged. Note that the specific configuration of the infrared transmission window, the infrared transmission layer, and the like can be the same as those of, for example, Japanese Patent No. 5392644, and thus description thereof will be omitted here.

  The infrared transmission window is preferably formed by a method capable of forming a desired infrared transmission window. For example, as the step of forming the decorative portion, it is preferable to simultaneously form the infrared transmission window. Specifically, a so-called photolithography method in which a black photosensitive resin composition containing a black pigment and an uncured product of a photosensitive resin is applied on a transparent substrate and then exposed and developed in a predetermined pattern. It is preferable that the infrared transmission window is also patterned at the same time when the decorative portion is formed by patterning with. This is because it is possible to suppress an increase in the number of manufacturing steps due to the formation of the infrared transmission window, because a separate step of forming the infrared transmission window is not required.

  Further, the infrared transmissive layer arranged in the infrared transmissive window is said to be developed by applying the infrared transmissive composition forming the infrared transmissive layer on a transparent base material, then exposing it in a predetermined pattern. It can be formed by patterning by a so-called photolithography method.

8. Manufacturing Method of Decorative Member The manufacturing method of the decorative member of the present invention is not particularly limited as long as it is a method capable of obtaining a desired decorative member.
Hereinafter, description will be given with reference to the drawings.

  6A to 6C are schematic process diagrams showing an example of the method for manufacturing a decorative member of the present invention. As shown in FIG. 6A, the transparent base material 3 is prepared, and then, as shown in FIG. 6B, the decorative portion 2 is patterned on the transparent base material 3 by a photolithography method. By forming, the decorative member 1 can be manufactured. Note that roll-to-roll can be used when arranging the decorative portion. Further, as a method of disposing the decorative member thus obtained in, for example, a flexible display device, the decorative member is disposed on the carrier glass substrate 13 as shown in FIG. 6C, for example. After that, although not shown, a method of sticking the obtained laminated body to a flexible display device and then peeling off the carrier glass substrate can be mentioned. At this time, a removable adhesive layer may be provided between the carrier glass substrate and the transparent substrate.

  7A to 7C are schematic process diagrams showing another example of the method for manufacturing a decorative member of the present invention. As shown in FIG. 7 (a), a carrier glass base material 13 is prepared, and then, as shown in FIG. 7 (b), a transparent base material 3 is formed on the carrier glass base material 13 by a coating method, Next, as shown in FIG. 7C, a decorative member can be manufactured by forming the decorative portion 2 in a pattern on the transparent substrate 3 by a photolithography method. Although not shown in the drawings as a method of arranging the decorative member thus obtained in a flexible display device, for example, after the laminated body obtained in FIG. The method of peeling the carrier glass base material may be mentioned.

  When forming the decorative member of the present invention, the pressure-sensitive adhesive layer used between the transparent substrate and the carrier glass substrate can be any general pressure-sensitive adhesive layer, and can be used for initial adhesive strength and removability. From the viewpoint, it is preferable to use an acrylic adhesive. The composition of the acrylic pressure-sensitive adhesive is not particularly limited.

  In the present invention, by forming the decorating member on the carrier glass base material, it is possible to suppress problems such as shrinkage of the decorating member due to heating in the manufacturing process. Therefore, when arranging the black matrix or the like in the display area of the decorative member, it is possible to perform highly precise alignment.

  The detailed forming method of each member is the same as the contents described in the section for each member, and thus the description thereof is omitted here.

9. Specific Examples Specific examples of the decorating member of the present invention include those having the following configurations.

(1) Concrete example 1
Concrete Example 1 of the decorative member of the present invention is an example in which the decorative member has a sensor electrode capable of detecting the position of the touch panel.
Specific Example 1 of the present invention will be described below with reference to the drawings.

  Specific Example 1 of the decorative member of the present invention is, as shown in FIG. 8, a transparent base material 3, a decorative portion 2 arranged on the transparent base material 3, and a display region defined by the decorative portion 2. This is an example in which the black matrix 4 having a plurality of openings and the mesh-shaped sensor electrode 6 arranged on the black matrix 4 are arranged. Further, in the specific example 1, the sensor electrode 6 has a mesh-shaped first electrode 6a and a second electrode 6b, and the first electrode 6a and the second electrode 6b are electrically insulated via an insulating layer 7. There is.

  In Specific Example 1 of the present invention, by providing the black matrix on the same plane as the decorative portion, the decorative portion and the black matrix can be formed of the same material and at the same time. Therefore, it is possible to reduce the number of forming steps as compared with the case where the decorative portion and the black matrix are formed separately. In addition, since the sensor electrode is integrated with the decorating member, the thickness of the display device when the decorating member is used for the display device is larger than that when the sensor electrode base material is separately formed on the decorating member. Can be made thin.

(2) Concrete example 2
Specific Example 2 of the decorative member of the present invention is an example in which the decorative member has a sensor electrode and a colored portion.
Specific Example 2 of the present invention will be described below with reference to the drawings.

  Specific Example 2 of the decorative member of the present invention is, as shown in FIG. 9, a transparent base material 3, a decorative portion 2 arranged on the transparent base material 3, and a display region defined by the decorative portion 2. Black matrix 4 having a plurality of openings, a mesh-shaped sensor electrode 6 arranged on the black matrix 4, and a colored portion 15 (here, a red colored portion here) arranged in the opening of the black matrix. 15R, a green colored portion 15G, and a blue colored portion 15B). Further, in the specific example 2, the sensor electrode 6 has a mesh-shaped first electrode 6a and a second electrode 6b, and the first electrode 6a and the second electrode 6b are electrically insulated via an insulating layer 7. There is.

  In Specific Example 2 of the present invention, the opening portion of the black matrix has a colored portion, and the decorative member is integrated with the sensor electrode and the colored portion, so that the sensor electrode base material and the colored portion are separately provided on the decorative member. It is possible to reduce the thickness of the display device when the decorative member is used in the display device, as compared with the case of forming the colored layer having.

(3) Concrete example 3
Specific Example 3 of the decorative member of the present invention is an example in which the decorative member has a circularly polarizing plate and a sensor electrode.
Hereinafter, the third example of the present invention will be described with reference to the drawings.

  Specific Example 3 of the decorative member of the present invention is, as shown in FIG. 10, a transparent base material 3, a decorative portion 2 arranged on the transparent base material 3, and a display region defined by the decorative portion 2. A circularly polarizing plate 9 disposed on the black matrix 4, a black matrix 4 having a plurality of openings disposed in a display region on the circularly polarizing plate 9, and a mesh-shaped sensor electrode 6 disposed on the black matrix 4. Here is an example. Further, in the specific example 3, the sensor electrode 6 has a mesh-shaped first electrode 6a and a second electrode 6b, and the first electrode 6a and the second electrode 6b are electrically insulated via an insulating layer 7. There is.

  In Example 3 of the present invention, thinning can be realized as compared with the conventional decorative portion, and therefore the step between the transparent base material and the decorative portion can be made extremely small. Therefore, the circularly polarizing plate can be formed as it is without using the flattening layer for filling the step, and when the decorative member is used in the display device as compared with the case where the flattening layer is used, It is possible to reduce the thickness of the display device.

(4) Concrete example 4
Specific Example 4 of the decorative member of the present invention is an example in which the decorative member has a circularly polarizing plate, a sensor electrode, and a colored portion.
Specific Example 4 of the present invention will be described below with reference to the drawings.

  Specific Example 4 of the decorative member of the present invention is, as shown in FIG. 11, a transparent base material 3, a decorative portion 2 arranged on the transparent base material 3, and a display region defined by the decorative portion 2. The circularly polarizing plate 9 disposed on the black matrix 4, the black matrix 4 having a plurality of openings disposed in the display region on the circularly polarizing plate 9, the mesh-like sensor electrode 6 disposed on the black matrix 4, and the black matrix 4. This is an example including the colored portion 15 (here, the red colored portion 15R, the green colored portion 15G, and the blue colored portion 15B) arranged in the opening of the matrix. Further, in the specific example 4, the sensor electrode 6 has a mesh-shaped first electrode 6a and a second electrode 6b, and the first electrode 6a and the second electrode 6b are electrically insulated via an insulating layer 7. There is.

  In Example 4 of the present invention, thinning can be realized as compared with the conventional decorative portion, so that the step between the transparent base material and the decorative portion can be made extremely small. Therefore, the circularly polarizing plate can be formed as it is without using the flattening layer for filling the step, and when the decorative member is used in the display device as compared with the case where the flattening layer is used, It is possible to reduce the thickness of the display device. In addition, the colored portion is provided in the opening of the black matrix, and the sensor electrode and the colored portion are integrated with the decorating member, so compared to the case where the sensor electrode base material and the coloring layer are separately formed on the decorating member. Thus, when the decoration member is used in the display device, the thickness of the display device can be reduced.

B. Display Device The display device of the present invention is a device including the above-mentioned decorative member and a display panel.
Hereinafter, the display device of the present invention will be described with reference to the drawings.

  FIG. 12 is a schematic plan view showing an example of the display device of the present invention. As shown in FIG. 12, in the present invention, the decorative member 1 and the display panel 20 may be included. When the decorative member 1 does not have a touch panel function, the display device 100 of the present invention may include the touch panel 10 between the decorative member 1 and the display panel 20.

  The specific configuration of the display device of the present invention can be similar to that of, for example, Japanese Patent No. 5392644, and thus detailed description thereof is omitted here.

According to the present invention, when the display device is bent, it is possible to suppress the occurrence of peeling or cracking of the decorative portion. In addition, since the decorative portion has a predetermined light-shielding property, the decorative portion can hide the wiring and the like to obtain an excellent appearance.
The specific effect can be the same as the content described in the above section "A. Decorative member", and thus the description thereof is omitted here.

The display device of the present invention is not particularly limited as long as it has the decorating member and the display panel described above, but preferably has a predetermined flexibility. This is because the effect of using the decorating member in the present invention becomes remarkable.
Here, the predetermined flexibility means that after the bending endurance test is performed 100,000 times on the display device of the present invention, no defect occurs in the characteristics of the display device.
In addition, the bending endurance test of the display device can be measured by a DUMMLH-FU sheet-shaped body U-shaped repeating tester manufactured by Yuasa System Co., Ltd., a bending radius R = 3 mm, a rotation speed of 120 rpm / min, and a stroke of 20 mm, or DLDMLH-FS It is possible to measure with a sheet-shaped unloaded U-shaped stretch tester, bending radius R = 3 mm, rotation speed 120 rpm / min, and stroke 20 mm.

  Hereinafter, the decorating member, the display panel, and the touch panel that form the display device of the present invention will be described.

1. Decorative member The decorative member in the present invention is a member having a transparent transparent base material and a decorative portion arranged on the transparent base material. Note that the decoration member can be the same as the content described in the above section "A. Decoration member", and thus the description thereof is omitted here.

2. Display Panel The display panel in the present invention is typically a liquid crystal display panel or an electroluminescent (EL) panel, but may be an electronic paper panel, a display device using a cathode ray tube, or various known display panels.

  The display panel described above can be the same as that used in a general display device, and thus a detailed description thereof will be omitted here.

3. Touch Panel The touch panel in the present invention is typically a projected capacitive touch panel capable of multi-touch (multipoint simultaneous input). It is possible to use any touch panel of various known position detection methods including a position detection method that does not require a transparent electrode such as an induction method and an optical method.

  The touch panel may have some opaque components such as wirings, control circuits, and connectors that electrically connect these, on the outer periphery of the display area of the display device. It is preferable that these opaque components are arranged so as to overlap in plan view with the opaque region where the decorative portion is arranged in the decorative member. This is because the decorative portion can hide opaque components and improve the appearance of the display device.

4. Applications The applications of the display device of the present invention include, for example, mobile phones such as smartphones, mobile information terminals such as tablet PCs, personal computers, car navigations, digital cameras, electronic notebooks, game machines, vending machines, ATM terminals, and POS. Examples include terminals.

C. Method for Manufacturing Organic EL Display Device The method for manufacturing an organic EL display device according to the present invention is directed to a decorative member that is attached to a first glass base material and has a decorative portion formed on a first transparent base material. A decorative member preparing step of preparing, a sensor electrode base material laminating step of stacking a sensor electrode base material having a sensor electrode capable of detecting the position of the touch panel on the decorative member, and a second glass substrate An organic EL base material preparation step of preparing an organic EL base material adhered on a material, and a bonding step of bonding the sensor electrode base material laminated on the decorative member and the organic EL base material And the decorative member is the above-mentioned decorative member.

  A method for manufacturing the organic EL display device of the present invention will be described with reference to the drawings. The method of manufacturing the organic EL display device of the present invention can be performed, for example, by the steps shown in FIGS. First, as shown in FIG. 13 (a), there is a decorative member preparation step of adhering the decorative member 1 on the first carrier glass base material 13 and preparing the decorative member 1. Next, as shown in FIG. 13B, there is a sensor electrode base material laminating step of laminating the sensor electrode base material on the decorative member. In addition, the sensor electrode base material 40 here forms the black matrix 4 which has an opening part on the decoration member 1, and forms the 1st electrode 6a and the 2nd electrode 6b which are sensor electrodes on the said black matrix 4. Can be obtained. Subsequently, as shown in FIG. 13C, on the second carrier glass base material 13, the second transparent base material 3, the organic EL pixel 15 (here, the red pixel 15R, the green pixel 15G, and the blue pixel). 15B), and an organic EL base material preparation step of preparing an organic EL base material 50 by adhering an organic EL base material having a thin film transistor (TFT) wiring 14. Finally, as shown in FIG. 13D, there is a bonding step of bonding the sensor electrode base material 40 and the organic EL base material 50, and although not shown, the carrier glass is peeled off to form an organic EL display device. Can be obtained. The bonding of the sensor electrode base material 40 and the organic EL base material 50 can be performed by the adhesive layer 16.

  In the present invention, a color filter may be provided between the sensor electrode base material and the organic EL base material. Further, a circularly polarizing plate may be provided between the decorative member and the sensor electrode base material.

  Hereinafter, the sensor electrode base material forming step and the organic EL base material forming step in the method for manufacturing an organic EL display device of the present invention will be described.

1. Decorative member preparing step The decorative member preparing step in the present invention is a step of preparing a decorative member that is stuck on the first glass substrate and has a decorative portion formed on the first transparent substrate. is there.

  As the first glass base material used in this step, the same glass base material used in the general manufacturing process of a display device can be used. Further, the first glass substrate used here is a member that can be peeled off at the end of the manufacturing method of the present invention, and therefore the thickness and size thereof are not particularly limited.

  The decorative member formed in this step can be the same as the content described in the above section "A. Decorative member", and thus the description thereof is omitted here.

2. Sensor Electrode Base Material Laminating Step The sensor electrode base material laminating step in the present invention is a step of laminating a sensor electrode base material having a sensor electrode capable of detecting the position of the touch panel on the decorative member.

  The decorative member, the black matrix, and the sensor electrode formed in this step can be the same as the contents described in the above section "A. Decorative member", and thus the description thereof is omitted here. ..

3. Organic EL Base Material Preparing Step The organic EL base material preparing step in the present invention is a step of preparing an organic EL base material attached on the second glass base material.

  The organic EL substrate formed in this step is not particularly limited as long as it is a general organic EL substrate, and a publicly known method can be adopted as a manufacturing method. Note that the organic EL base material can be the same as, for example, JP-A-2015-162588, JP-A-2015-072827, and the like, so description thereof will be omitted here.

4. Laminating Step The laminating step in the present invention is a step of laminating the sensor electrode base material and the organic EL base material laminated on the decorative member.

  The bonding in this step can be performed by providing an adhesive layer or the like between the sensor electrode base material and the organic EL base material. Specifically, the sensor electrode base material or the organic EL base material can be bonded by arranging an adhesive layer on the surface and press-bonding.

  The adhesive layer used in this step may be the same as that used in a general organic EL display device forming step, and thus the description thereof is omitted here.

5. Other Steps In the present invention, the decorative member preparing step, the sensor electrode base material laminating step, the organic EL base material preparing step, and the bonding step described above may be included, and other steps may be performed as necessary. You may have.
For example, when the circularly polarizing plate is provided between the decorative member and the sensor electrode base material, the circularly polarizing plate is laminated on the decorative member during the decorative member preparing step and the sensor electrode base material laminating step. It may have a circularly polarizing plate laminating step.
When a color filter is provided between the sensor electrode base material and the organic EL base material, a color filter in which the color filter is laminated on the organic EL base material during the organic EL base material preparing step and the bonding step. You may have a lamination process.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, has substantially the same configuration as the technical idea described in the scope of the claims of the present invention, and has the same operational effect It is included in the technical scope of the invention.

[Examples 1 to 4, Comparative Examples 1 and 2]
A transparent substrate (material: triacetyl cellulose (TAC), thickness: 40 μm) was coated with a composition for forming a decorative part having the following composition by a die coating method, and the total light transmittance shown in Table 1 was applied. And a decorative portion having a thickness was formed. In this way, the decorative member was formed. As the composition for forming a decorative member, a photosensitive resin composition containing coated carbon as a pigment and an acrylic resin and an alkali-soluble resin as main components was used.

[Evaluation]
For the decorative members obtained in Examples 1 to 4 and Comparative Examples 1 to 2, bending radius R = 3 mm, rotation speed 120 rpm, using a DUMMLH-FU planar body U-shaped repeating tester manufactured by Yuasa System Co., Ltd., The bending endurance test was carried out 200,000 times under the condition of a stroke of 20 mm, and then the decorative portion was evaluated for cracking or peeling. The results are shown in Table 1 below.
・ Cracking ○: No cracking ×: Cracking / peeling ○: No peeling ×: Peeling

DESCRIPTION OF SYMBOLS 1 ... Decorating member 2 ... Decorating part 3 ... Transparent base material 4 ... Black matrix 5 ... Coloring part 6 ... Sensor electrode 9 ... Circular polarizing plate 20 ... Display panel 40 ... Sensor electrode base material 50 ... Organic EL base material 100 ... Display device 200 ... Organic EL display device D ... Display area

Claims (4)

A transparent base material having flexibility, and a decoration member having a decoration portion arranged on the transparent base material,
The decorative portion is a cured product containing a black pigment in a resin binder containing a photosensitive resin,
The pigment concentration of the black pigment with respect to the total solid content of the decorative portion is in the range of 45% by mass to 80% by mass,
The total light transmittance of the decorative portion is 0.02% or less,
In the display area defined by the decorating section, a circularly polarizing plate is provided,
A black matrix having a plurality of openings on the circularly polarizing plate,
A decorating member having a sensor electrode capable of detecting a position of a touch panel on the black matrix. The decorative portion has a thickness within a range of 1.0 μm to 3.0 μm,
The decorative member according to claim 1, wherein the decorative portion is not cracked or peeled off after a bending durability test with a bending radius of 3 mm is performed 100,000 times or more. A decorating member according to claim 1 or 2 ;
A display device having a display panel. A decorating member preparing step of preparing a decorating member that is attached to a first glass substrate and has a decorating portion formed on the first transparent substrate that is the transparent substrate;
On the decorative member, a sensor electrode base material laminating step of stacking a sensor electrode base material having a sensor electrode capable of performing position detection of a touch panel,
An organic electroluminescent substrate preparation step of preparing an organic electroluminescent substrate adhered on a second glass substrate;
A bonding step of bonding the sensor electrode base material laminated on the decorative member, and the organic electroluminescence base material,
The said decorating member is the said decorating member described in Claim 1 or Claim 2 , The manufacturing method of the organic electroluminescent display apparatus characterized by the above-mentioned.