JP2017116879A - Base material for display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base material for a display that can reduce the thickness of a liquid crystal display and can suppress a deterioration of an optical functional member in manufacturing the display.SOLUTION: The present invention provides a base material for a display comprising: a base material; an ultraviolet curable adhesive layer that is arranged on one surface of the base material; an optical functional member that is arranged on the substrate with the ultraviolent curable adhesive layer therebetween and includes an optical functional layer having a liquid crystalline compound oriented in one direction; and a functional layer that is arranged on a surface of the optical functional member on the opposite side of the ultraviolet curable adhesive layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a substrate for a display device having an optical functional layer in which a liquid crystalline compound is aligned in one direction.

  In recent years, with the development of personal computers, particularly portable personal computers, the demand for display devices has increased. In recent years, the penetration rate of home-use LCD TVs has increased, and smartphones and tablet terminals have also become widespread, so the market for display devices is increasingly expanding.

  As such a display device, for example, an organic electroluminescence display device generally has a functional layer, an organic electroluminescence element substrate as a counter substrate, and a light source called a backlight unit. For example, Patent Documents 1 and 2 propose a configuration including an alignment layer including a photoalignment material and an optical functional layer in which a liquid crystal compound is aligned in one direction. In the case where the display device includes an optical function layer, the effect of viewing angle dependency can be solved.

  As a structure of the base material for display apparatuses which has an optical function layer, as shown to Fig.11 (a), for example, the transparent base material 21, the colored part 22 (here red coloring part 22R, green coloring part 22G, blue) An in-cell type including a color portion 22B) and a color filter 20 having a light-shielding portion 23, and an optical function member 11 disposed on the color portion 22 side of the color filter 20 and having an optical function layer 3 and an alignment layer 4. As shown in FIG. 11 (b), an optical functional member having an optical functional layer 3 and an alignment layer 4 disposed on the base 1 'via an adhesive layer 2' on the transparent substrate 21 side of the color filter 20. 11 and an out-cell type. 11A and 11B show an example in which the functional layer is a color filter.

  When the display device is an in-cell type, an optical functional member having an alignment layer and an optical functional layer can be disposed on the colored portion side of the color filter (for example, Patent Document 3). Therefore, when the display device is an in-cell type, unlike the out-cell type, it is not necessary to arrange the optical functional member formed on the base material on the color filter, so the base material for supporting the optical functional member Therefore, the total thickness can be reduced as compared with the out-cell type.

JP 2012-198522 A JP 2013-3344 A JP 2013-228654 A

  By the way, in an in-cell type display device, for example, as shown in FIG. 11A, the optical functional layer 3 and the alignment layer 4 may be directly formed on the colored portion 22 of the color filter 20 in some cases. However, when the optical functional member 11 having the optical functional layer 3 and the alignment layer 4 is directly formed on the colored portion of the color filter, the productivity is reduced as compared with the case where the optical functional layer formed in advance is laminated. There is a problem. In addition, there is a problem that a colored portion that is in direct contact with the heating step in forming the optical functional member has a problem. In addition, the said subject arises similarly, when a color filter is other functional layers, such as a touch panel and a decorating member.

  Therefore, the inventors of the present invention, for example, as shown in FIG. 12, transfer a color filter 20 and an optical functional member 11 having the optical functional layer 3 and the alignment layer 4 through an adhesive layer 2 ′. Tried. As a result, it was found that the color filter and the optical functional member can be laminated, and the productivity can be improved as compared with the case described above. Moreover, it turned out that generation | occurrence | production of the malfunction by the coloring part in a color filter being heated can be suppressed.

However, as a result of repeated studies by the inventors of the present invention, the following new problems have been discovered.
That is, conventionally, a pressure-sensitive adhesive has been used as the adhesive layer. However, when a pressure-sensitive adhesive is used as the adhesive layer, there is a problem that an optical functional layer adjacent to the adhesive layer is deteriorated by heating when a display device is manufactured. In addition, the thickness of the adhesive layer using the pressure sensitive adhesive becomes relatively thick, such as 10 μm or more, and there is a problem that it is difficult to reduce the thickness of the display device.
Furthermore, for example, in the display device base 10 ′ having the configuration as shown in FIG. 12, the optical functional member 11 having the optical functional layer 3 and the alignment layer 4 on the outermost surface is disposed. Here, there is a problem that the optical functional member is deteriorated by being exposed to a solvent, light, or the like used in manufacturing the display device.

  The present invention has been made in view of the above circumstances, and provides a substrate for a display device that can reduce the thickness of the display device and can suppress deterioration of an optical functional member when the display device is manufactured. The main purpose is to provide.

  As a result of diligent research to solve the above-mentioned problems, the inventors of the present invention found that the ultraviolet curable resin composed of an ultraviolet curable resin instead of the pressure-sensitive adhesive conventionally used as an adhesive layer. By using the adhesive layer, it has been found that the thickness of the adhesive layer can be made thinner than before, and the display device can be made thinner. In addition, the inventors of the present invention can suppress deterioration of the optical functional member by further providing a functional layer as a separate layer on the surface of the optical functional member on the outermost surface of the display device substrate. Obtained knowledge. The inventors of this invention came to complete this invention based on such knowledge.

  That is, the present invention provides a substrate, an ultraviolet curable adhesive layer disposed on one side of the substrate, and the liquid crystalline compound disposed on the substrate via the ultraviolet curable adhesive layer. An optical functional member having an optical functional layer oriented in one direction, and a functional layer disposed on the surface of the optical functional member opposite to the ultraviolet curable adhesive layer. A substrate is provided.

  According to the present invention, by having a functional layer on the optical functional member, the optical functional member is prevented from becoming the outermost surface of the substrate for a display device, and depends on a solvent, light, or the like used in manufacturing the display device. It can be set as the base material for display apparatuses which can suppress deterioration. In addition, by using an ultraviolet curable adhesive layer, for the display device that can solve the problem that the optical functional layer adjacent to the ultraviolet curable adhesive layer is deteriorated due to heating in manufacturing the display device. It can be a substrate. Furthermore, the thickness can be reduced as compared with a conventional adhesive layer using a pressure-sensitive adhesive, and a display device substrate capable of reducing the thickness of the display device can be obtained.

  In this invention, it is preferable to have a 2nd functional layer between the said base material and the said ultraviolet curable adhesive layer. It can be set as the base material for display apparatuses which has a function of a 2nd functional layer.

  In the present invention, the functional layer is a color filter having a transparent substrate, a light-shielding portion arranged on the transparent substrate and having a plurality of openings, and a colored portion arranged in the openings, and the color It is preferable that the colored portion side surface of the filter is disposed so as to face the optical function member. When the functional layer is a color filter, a base material for a display device having a color filter function can be obtained.

  In the present invention, the functional layer is a touch panel having a transparent substrate and a sensor electrode disposed on the transparent substrate, and the surface on the sensor electrode side of the touch panel faces the optical functional member. It is preferable to arrange | position. When the functional layer is a touch panel, a base material for a display device having a touch panel function can be obtained.

  In the present invention, the functional layer is a decorative member having a transparent base material and a decorative portion arranged on the transparent base material, and the surface on the decorative portion side of the decorative member is the optical member. It is preferable that they are arranged so as to face the functional member. When the functional layer is a decorative member, a display device substrate having a decorative function can be obtained.

  The present invention can reduce the thickness of a display device when used in a display device, and can be used to produce a display device base material capable of suppressing deterioration of an optical function member due to a solvent or light. There is an effect that can be done.

It is a schematic sectional drawing which shows an example of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the base material for display apparatuses of this invention. It is a schematic sectional drawing which shows an example of the display apparatus using the base material for display apparatuses of this invention. 10 is a schematic diagram for explaining a sensor electrode in Example 3. FIG. It is a schematic sectional drawing which shows an example of the conventional base material for display apparatuses. It is a schematic sectional drawing which shows the other example of the conventional base material for display apparatuses.

  Hereinafter, the base material for display devices will be described.

  The substrate for a display device of the present invention is disposed on the substrate via the substrate, the ultraviolet curable adhesive layer disposed on one side of the substrate, and the ultraviolet curable adhesive layer, An optical functional member having an optical functional layer in which a liquid crystal compound is aligned in one direction, and a functional layer disposed on a surface of the optical functional member opposite to the ultraviolet curable adhesive layer, It is a member to do.

The display device substrate of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an example of the substrate for a display device of the present invention. A substrate 10 for a display device according to the present invention is formed on a substrate 1 via a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one surface side of the substrate 1, and the ultraviolet curable adhesive layer 2. The optical functional member 11 having the optical functional layer 3 and the alignment layer 4 in which the liquid crystal compound is aligned in one direction and the surface of the optical functional member 11 opposite to the ultraviolet curable adhesive layer 2 are disposed. And a functional layer 5. In addition, the base material for display apparatuses shown in FIG. 1 is an example in which the optical functional member 11 has the alignment layer 4 on the functional layer 5 side.

  Fig.2 (a) is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. As shown in FIG. 2A, the display device substrate 10 of the present invention includes a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one surface side of the substrate 1, and an ultraviolet curable adhesive. An optical functional member 11 having an optical functional layer 3 and an alignment layer 4 which are arranged on the base material 1 with the liquid crystal compound aligned in one direction via the layer 2, and an ultraviolet curable adhesive layer 2 of the optical functional member 11. The color filter 20 (5) is disposed on the surface opposite to the transparent substrate 21, and the color filter 20 is disposed on the transparent substrate 21 and the first light shielding unit 23 having a plurality of openings. , And a colored portion 22 (here, a red colored portion 22R, a green colored portion 22G, and a blue colored portion 22B) arranged in the opening. 2A is an example in which the functional layer 5 in FIG. 1 is the color filter 20 and the ultraviolet curable adhesive layer 2 is provided between the color filter 20 and the optical functional member 11.

  FIG.2 (b) is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. As shown in FIG. 2 (b), the display device substrate 10 of the present invention includes a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one surface side of the substrate 1, and an ultraviolet curable adhesive. An optical functional member 11 having an optical functional layer 3 and an alignment layer 4 which are arranged on the base material 1 with the liquid crystal compound aligned in one direction via the layer 2, and an ultraviolet curable adhesive layer 2 of the optical functional member 11. Touch panel 30 (5) disposed on the opposite side of the touch panel 30, so that the touch panel 30 covers the transparent substrate 31, the sensor electrode 32 disposed on the transparent substrate 31, and the sensor electrode 32. The insulating layer 33 is disposed. 2B is an example in which the functional layer 5 in FIG. 1 is the touch panel 30 and the ultraviolet curable adhesive layer 2 is provided between the touch panel 30 and the optical functional member 11.

  FIG.2 (c) is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. As shown in FIG. 2C, the display device substrate 10 of the present invention includes a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one surface side of the substrate 1, and an ultraviolet curable adhesive. An optical functional member 11 having an optical functional layer 3 and an alignment layer 4 which are arranged on the base material 1 with the liquid crystal compound aligned in one direction via the layer 2, and an ultraviolet curable adhesive layer 2 of the optical functional member 11. The decorative member 40 (5) disposed on the surface opposite to the transparent member 41 includes the transparent base member 41, the decorative portion 42 disposed on the transparent base member 41, and the decorative member. It has the protection part 43 arrange | positioned so that the part 42 may be covered. 2C is an example in which the functional layer 5 in FIG. 1 is the decorative member 40 and the ultraviolet curable adhesive layer 2 is provided between the decorative member 40 and the optical functional member 11.

  Fig.3 (a) is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. As shown in FIG. 3A, the display device substrate 10 of the present invention includes a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one surface side of the substrate 1, and an ultraviolet curable adhesive. An optical functional member 11 having an optical functional layer 3 and an alignment layer 4 which are arranged on the base material 1 with the liquid crystal compound aligned in one direction via the layer 2, and an ultraviolet curable adhesive layer 2 of the optical functional member 11. And a color filter 20 (5) disposed on the surface of the protective unit 50 opposite to the optical functional member 11. FIG. 3A is an example in which the protection unit 50 and the transparent substrate 21 in the color filter 20 are used as a common member.

  FIG.3 (b) is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. As shown in FIG. 3B, the display device substrate 10 of the present invention includes a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one side of the substrate 1, and an ultraviolet curable adhesive. An optical functional member 11 having an optical functional layer 3 and an alignment layer 4 which are arranged on the base material 1 with the liquid crystal compound aligned in one direction via the layer 2, and an ultraviolet curable adhesive layer 2 of the optical functional member 11. And the touch panel 30 (5) disposed on the surface opposite to the optical function member 11 of the protection unit 50. The touch panel 30 is a transparent substrate. 31, and a sensor electrode 32 disposed on the transparent substrate 31. FIG. 3B is an example in which the protection unit 50 and the transparent substrate 31 in the touch panel 30 are used as a common member.

  FIG.3 (c) is a schematic sectional drawing which shows the other example of the base material for display apparatuses of this invention. As shown in FIG. 3C, the display device substrate 10 of the present invention includes a substrate 1, an ultraviolet curable adhesive layer 2 disposed on one surface side of the substrate 1, and an ultraviolet curable adhesive. An optical functional member 11 having an optical functional layer 3 and an alignment layer 4 which are arranged on the base material 1 with the liquid crystal compound aligned in one direction via the layer 2, and an ultraviolet curable adhesive layer 2 of the optical functional member 11. And the decorative member 40 (5) disposed on the surface opposite to the optical function member 11 of the protective unit 50, and the decorative member 40 includes: , A transparent base material 41, and a decorative portion 42 disposed on the transparent base material 41. In addition, FIG.3 (c) is an example in which the protection part 50 and the transparent base material 41 in the decorating member 40 are used as a common member.

According to the present invention, by having a functional layer on the optical functional member, the optical functional member is prevented from becoming the outermost surface of the substrate for a display device, and depends on a solvent, light, or the like used in manufacturing the display device. It can be set as the base material for display apparatuses which can suppress deterioration. For this reason, for example, the following can be considered.
That is, the optical functional member, particularly the optical functional layer in which the liquid crystalline compound is aligned in one direction, is disturbed in the alignment due to the solvent used in manufacturing the display device, irradiated light, and heating. In some cases, the desired optical function cannot be exhibited. Accordingly, the inventors of the present invention have arranged a functional layer on the outermost surface of the optical functional member so that the optical functional member does not become the outermost surface in the base material for display device. As a result, it is possible to suppress the above-mentioned problems caused by solvent contact, light irradiation, and heating to the optical function member, and to suppress deterioration of the optical function member when manufacturing a display device. It is thought that it can be used as a material.

In addition, according to the present invention, by using the ultraviolet curable adhesive layer, the optical functional member adjacent to the ultraviolet curable adhesive layer, particularly the optical functional layer, is deteriorated by heating at the time of manufacturing the display device. It can be set as the base material for display apparatuses which can solve a subject. For this reason, for example, the following can be considered.
That is, in the case of an adhesive layer using a conventional pressure-sensitive adhesive, the pressure-sensitive adhesive exhibits fluidity by heating when producing a display device, and the pressure-sensitive adhesive soaks into an adjacent optical functional layer. Such a problem occurs. In this case, there is a problem that the pressure-sensitive adhesive soaked disturbs the orientation of the liquid crystalline compound constituting the optical functional layer, making it difficult for the optical functional layer to exhibit a desired optical function. On the other hand, the ultraviolet curable resin constituting the ultraviolet curable adhesive layer has a property of being cured by irradiation with ultraviolet rays. Therefore, the UV curable adhesive layer after curing is less likely to exhibit fluidity by heating during the production of a display device, and suppresses the occurrence of problems such as penetration into adjacent optical function members, particularly optical function layers. It is considered that the above-described problems can be solved.

Furthermore, according to the present invention, the use of the ultraviolet curable adhesive layer can reduce the thickness as compared with a conventional adhesive layer using a pressure-sensitive adhesive, thereby reducing the thickness of the liquid crystal display device. It can be set as the base material for possible display apparatuses. For this reason, for example, the following can be considered.
Conventionally, a pressure sensitive adhesive has been used for an adhesive layer for adhering an optical functional member on a substrate. However, when a pressure-sensitive adhesive is used as the adhesive layer, the thickness of the adhesive layer tends to be relatively thick at 10 μm or more. On the other hand, in the present invention, the thickness of the adhesive layer is reduced compared to the conventional one by using an ultraviolet curable adhesive layer composed of an ultraviolet curable resin instead of the conventionally used pressure sensitive adhesive. Therefore, it is considered that the display device substrate can be thinned.

  Hereinafter, each member which comprises the base material for display apparatuses of this invention, the manufacturing method of the base material for display apparatuses, and the display apparatus using the base material for display apparatuses are demonstrated.

1. Functional layer The functional layer in this invention is a member arrange | positioned on the surface on the opposite side to the ultraviolet curable adhesive layer of an optical function member.

The functional layer in this invention is a functional member which comprises a display apparatus, and can be suitably selected as needed. As a functional layer, a color filter, a touch panel, a decorating member, a protection part, etc. are mentioned, for example. Moreover, the functional layers such as the color filter, the touch panel, and the decorating member may have a transparent base material or may not have a transparent base material. In the case of having a transparent substrate, the functional layer can be formed by a transfer method, and in the case of having no transparent substrate, the functional layer can be directly formed.
Furthermore, in the present invention, the functional layer described above may be used as a single layer, or two or more layers may be used in combination.

  Hereinafter, a color filter, a touch panel, a decorative member, and a protection part will be described as specific examples of the functional layer in the present invention.

(1) Color filter The color filter in this invention has a transparent base material, the light-shielding part which is arrange | positioned on a transparent base material, and has a several opening part, and the coloring part arrange | positioned at the opening part.

(A) Transparent base material The transparent base material in this invention is a member which supports the light-shielding part and coloring part which are mentioned later.

  Here, in the case of “transparent”, unless otherwise specified, the transparency of the display device operator using the display device substrate of the present invention is not so transparent as to prevent visual recognition from the operation surface. Say. Therefore, “transparent” includes colorless and transparent, and colored transparency that does not hinder visibility, is not defined by strict transmittance, and has transparency depending on the use of the display device substrate of the present invention. The degree can be determined.

  The thickness of the transparent substrate in the present invention is not particularly limited as long as it can support each member, and can be appropriately designed according to the use of the substrate for a display device of the present invention. Since the specific thickness of the transparent substrate can be the same as the thickness of the transparent substrate used for a general color filter, description thereof is omitted here.

  The material of the transparent substrate in the present invention is not particularly limited as long as it is a material used for a general color filter. For example, inorganic material having no flexibility such as quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate, etc. Examples thereof include a substrate and a flexible resin substrate such as a transparent resin film and an optical resin plate. Among them, it is preferable to use an inorganic substrate, and it is preferable to use a glass substrate among inorganic substrates. Furthermore, it is preferable to use an alkali-free type glass substrate among the glass substrates. This is because the alkali-free type glass substrate is excellent in dimensional stability and workability in high-temperature heat treatment, and does not contain an alkali component in the glass, and thus is suitable for, for example, a color filter used in a display device. .

(B) Light-shielding part The light-shielding part in this invention is a member arrange | positioned on a transparent base material and having a some opening part.

  In the present invention, the light shielding portions are arranged in parallel so as to extend in the first direction and the second direction intersecting the first direction, and the openings are defined. Examples of the shape of the opening include a rectangular shape. In addition, the width of the opening in the light shielding portion can be the same as the width of the opening in the light shielding portion in a general color filter, and thus description thereof is omitted here.

  The line width of the light-shielding part in the present invention can be appropriately selected according to the use of the substrate for display device of the present invention, and is not particularly limited, but is preferably in the range of 1 μm to 30 μm, for example. Of these, the range of 1.5 to 28 μm is preferable, and the range of 2 to 25 μm is particularly preferable. When the line width of the light shielding portion is smaller than the above range, there is a possibility that the opening cannot be sufficiently defined. Further, when the line width of the light shielding portion is larger than the above range, there is a possibility that a high-definition color filter cannot be obtained. When the line width of the light shielding part is not constant, it is preferable that all the line widths of the light shielding part are within the above range.

  The thickness of the light shielding part in the present invention is not particularly limited as long as it is a thickness that can exhibit a desired light shielding property, and is appropriately adjusted according to the material used for the light shielding part. As a specific thickness of the light shielding part in the present invention, for example, it can be set to about 0.5 μm to 3.0 μm.

  The constituent material of the light shielding part in the present invention is not particularly limited as long as it is a material that can exhibit a desired light shielding property. Specifically, the light-shielding portion is usually a cured product containing a black color material in a binder resin, but may contain a colored color material as necessary in addition to the black color material.

  The binder resin used for the light shielding portion is preferably a material that can disperse a black color material, for example. Moreover, the binder resin used for the light shielding part is appropriately selected according to the method for forming the light shielding part. When the light-shielding portion is formed by photolithography, examples of the binder resin include photosensitive resins having reactive vinyl groups such as acrylate-based, methacrylate-based, polyvinyl cinnamate, or cyclized rubber. . When the light shielding part is formed by a printing method or an ink jet method, examples of the binder resin include polymethyl methacrylate resin, polyacrylate resin, polycarbonate resin, polyvinyl alcohol resin, polyvinyl pyrrolidone resin, hydroxyethyl cellulose resin, carboxymethyl cellulose resin. , Polyvinyl chloride resin, melamine resin, phenol resin, alkyd resin, epoxy resin, polyurethane resin, polyester resin, maleic acid resin, polyamide resin and the like.

  As a black color material used for the light shielding part, for example, the same material as that of a general light shielding part can be used, and any of a pigment and a dye can be used. Specific examples include carbon black and titanium black.

  The colored color material other than the black color material used for the light shielding portion may be any material that can form a light shielding portion having a desired light shielding property, such as red, green, blue, yellow, orange, purple, and the like. Colored materials of each color are listed. Moreover, both a pigment and a dye can be used for the colored material. Colored color materials may be used singly or in combination of two or more. The colored color material may be a single color material or a mixture of two or more color materials. In addition, about a colored color material, since it can be made the same as that of the colored color material used for a general color filter, description here is abbreviate | omitted.

The content of the black color material contained in the light shielding part is not particularly limited as long as it is a level that can form a light shielding part having a desired light shielding property. For example, a black color material is included in the light shielding part. The main component of the coloring material is preferable. Specifically, the content of the black color material contained in the light shielding portion is preferably in the range of 3% by mass to 20% by mass, and more preferably in the range of 4% by mass to 18% by mass. It is particularly preferable that the content be in the range of 5% by mass to 15% by mass.
Moreover, as content of colored color materials other than the black color material contained in a light-shielding part, it is preferable to exist in the range of 1 mass%-8 mass%, for example, and the range of 1 mass%-6 mass% is especially preferable. It is preferable that it is in the range, and it is particularly preferable to be in the range of 1% by mass to 4% by mass.

  In addition to the above-described constituent materials, the light-shielding portion in the present invention may contain other materials as necessary. Examples of other materials include a photopolymerization initiator, a sensitizer, a coating property improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, and a flame retardant.

(C) Colored part The colored part in this invention is a member arrange | positioned at the opening part in the light-shielding part mentioned above.

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

  In the present invention, for example, it has three colored portions of red, green, and blue. The color of the colored portion may be any color that includes 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, Five colors such as green, blue, yellow, and cyan may be used.

  As a coloring part, what disperse | distributed the coloring material in binder resin can be used, for example. Examples of the color material used in the colored portion include pigments and dyes of each color. For example, examples of the coloring material used in the red coloring portion include perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, and isoindoline pigments. Examples of the colorant used in the green coloring portion include phthalocyanine pigments such as halogen polysubstituted phthalocyanine pigments or halogen polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, isoindoline pigments, and isoindoline pigments. Examples include linone pigments. Furthermore, examples of the color material used for the blue colored portion include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, dioxazine pigments, and the like. These pigments and dyes may be used alone or in combination of two or more. Examples of the binder resin used for the colored portion include photosensitive resins having reactive vinyl groups such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber.

  In addition to the above-described materials, the colored portion may contain a photopolymerization initiator, a sensitizer, a coatability improver, a development improver, a crosslinking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. It can be included.

  In addition, a white layer containing a binder resin may be formed on the same plane where the colored portion is formed, without containing the above-described color material.

(2) Touch panel The touch panel in this invention has a transparent base material and the sensor electrode arrange | positioned on a transparent base material. Further, the touch panel usually has an insulating layer arranged so as to cover the sensor electrode.

  As the touch panel according to the present invention, for example, a resistive film type, a capacitance type, an optical type, an electromagnetic induction type, an ultrasonic type, or the like can be used.

(A) Transparent base material The transparent base material in this invention is a member which supports the sensor electrode mentioned later.
In addition, about the transparent base material in this invention, since it can be made to be the same as that of the content described in the term of "(1) Color filter (a) transparent base material" mentioned above, description here is abbreviate | omitted.

(B) Sensor electrode The sensor electrode in this invention is a member used in order to perform the position detection of a touch panel.

  The sensor electrode in the present invention may be a transparent conductive layer having transparency, or may be a mesh electrode with a fine line. In the present invention, when the sensor electrode is a mesh electrode made of fine lines, even if the material used for the sensor electrode is an opaque metal material, it can be an apparently transparent sensor electrode.

When the sensor electrode in the present invention is a transparent conductive layer, the thickness of the sensor electrode and the like can be appropriately adjusted according to the use of the substrate for a display device obtained by the present invention, and is the same as that of a general sensor electrode Therefore, the description here is omitted.
Further, when the sensor electrode in the present invention is a mesh electrode, the thickness, line width, pitch, aperture ratio, etc. of the sensor electrode can be appropriately adjusted according to the use of the display device substrate obtained by the present invention. Since it can be the same as a general sensor electrode, description thereof is omitted here.

When the sensor electrode is a transparent electrode layer, for example, a transparent conductive material such as tin oxide, indium tin oxide called ITO, or indium zinc oxide called IZO is used as the constituent material of the sensor electrode in the present invention. be able to.
Further, when the sensor electrode in the present invention is a mesh electrode made of an opaque metal material, the metal material is, for example, silver, gold, copper, chromium, platinum, aluminum alone or any one of them. And the like. As the metal alloy, an alloy of silver, palladium, copper or the like called APC can be used. Further, as the metal composite, a three-layer structure of molybdenum, aluminum, and molybdenum called MAM is also applicable. Furthermore, for example, a conductive polymer obtained by adding the above metal to a resin layer forming composition such as PEDOT can also be used.

(C) Insulating layer The insulating layer in this invention is a member which can be used when insulating the sensor electrode mentioned above.

  The insulating layer in the present invention is usually disposed so as to cover the sensor electrode. The thickness of the insulating layer is preferably a thickness that can insulate the sensor electrode and prevent a short circuit, and can be appropriately adjusted according to the design of the sensor electrode. For example, the thickness of the insulating layer can be in the range of 0.5 μm to 3 μm.

  The constituent material of the insulating layer in the present invention is preferably a material having a desired insulating property, and materials generally used for touch panels can be used. Specifically, insulating resin materials such as polyimide resin, acrylic resin, cardo resin, epoxy resin, and melamine resin, inorganic materials such as glass, and the like can be given. In addition, the structural material used for an insulating layer may be used individually by 1 type, and may be used in combination of 2 or more type. Further, the insulating layer may have a single layer structure or a multilayer structure including two or more layers.

(3) Decoration member The decoration member in this invention has the decorating part arrange | positioned on a transparent base material and a transparent base material.

  The decoration part used for the decoration member in this invention is a member which exhibits a predetermined color. Therefore, in the display device using the base material for display device of the present invention, the decorative member in the present invention is displayed by arranging the decorative portion so as to overlap in a non-pixel region such as a frame portion in a plan view. The appearance of the device can be improved.

(A) Transparent base material The transparent base material in this invention is a member which supports the decorating part mentioned later.
In addition, about the transparent base material in this invention, since it can be made to be the same as that of the content described in the term of "(1) Color filter (a) transparent base material" mentioned above, description here is abbreviate | omitted.

(B) Decoration part The decoration part in this invention can improve the external appearance of the display apparatus using the base material for display apparatuses of this invention by exhibiting a predetermined color.

  Since the thickness of the decoration part in this invention can be suitably adjusted according to the use etc. of the display apparatus using the base material for display apparatuses of this invention, and it can be made the same as that of a general decoration part. Explanation here is omitted.

  The color which the decoration part in this invention exhibits can be suitably selected according to the design etc. of a display apparatus. When the decorative part is a black decorative part that exhibits black, the constituent material of the black decorative part is the same as the constituent material of the light shielding part described in the above-mentioned section “(1) Color filter (b) Light shielding part”. Therefore, the description here is omitted. Further, when the decorative part is a white decorative part exhibiting white, examples of the constituent material of the white decorative part include titanium oxide, silica, talc, kaolin, clay, barium sulfate, and calcium hydroxide. .

(4) Protection part The protection part in this invention is a member which can protect the optical function layer arrange | positioned in the lower layer of the said protection part from a solvent, light, etc.

  The protective part in the present invention preferably has a function of protecting the optical functional layer from deterioration due to a solvent, light or the like. Therefore, the protective part in the present invention is preferably a member having chemical resistance, light resistance and heat resistance.

  The thickness of the protective part in the present invention is preferably a thickness that can provide a protective function as the protective part, specifically, chemical resistance, light resistance and heat resistance. For example, it can be in the range of 1 μm to 5 μm.

  As the constituent material of the protective portion in the present invention, the same material as the protective portion of a general display device can be used. Among them, it is preferable to use a material having chemical resistance and light resistance. The constituent material of such a protective part may be an organic material or an inorganic material, but when an inorganic material is used, the protective part can be formed by a sputtering method. Since the heating step is not required for forming the protective part as used, the influence on the optical functional layer due to the heating step can be suppressed. Examples of the organic material used for the protective part in the present invention include an epoxy resin, an acrylic resin, and a polyimide resin. Moreover, as an inorganic material used for the protection part in this invention, material with high transparency and interruption | blocking property, such as SiN and SiON, is mentioned, for example.

2. Ultraviolet curable adhesive layer The ultraviolet curable adhesive layer in the present invention is a member disposed on one surface side of a substrate described later.

In the present invention, an ultraviolet curable adhesive layer can be provided between the optical functional layer described later and the functional layer described above as necessary.
Here, the ultraviolet curable resin constituting the ultraviolet curable adhesive layer has a property of high heat resistance as compared with a conventionally used pressure-sensitive adhesive or the like. The heat resistance of the ultraviolet curable resin is specifically said to be about 250 ° C. Accordingly, a display device is manufactured by providing such an ultraviolet curable adhesive layer between the optical functional member and the functional layer, that is, on the surface of the optical functional member that is the outermost surface of the display device substrate. There is an effect that the optical functional member can be effectively protected from the heating.

  The ultraviolet curable adhesive layer in the present invention refers to a member that is cured by irradiation with ultraviolet rays and exhibits adhesiveness. Further, the ultraviolet curable adhesive layer usually has a predetermined tackiness before being irradiated with ultraviolet rays. Here, the predetermined tackiness is preferably, for example, that the peeling strength of the ultraviolet curable adhesive layer with respect to the glass plate by the 180-degree peeling test specified in JIS K6854-2 is 10 N / 25 mm width or more. The width is preferably 15 N / 25 mm width or more, and particularly preferably 20 N / 25 mm width or more. In the present invention, the peel strength of the ultraviolet curable adhesive layer is preferably, for example, 50 N / 25 mm width or less, more preferably 45 N / 25 mm width or less, and particularly 40 N / 25 mm width or less. It is preferable that

In the present invention, by using the ultraviolet curable adhesive layer, it is possible to reduce the thickness as compared with a conventionally used ultraviolet curable adhesive layer made of a pressure-sensitive adhesive. The thickness of the ultraviolet curable adhesive layer in the present invention is preferably, for example, 10 μm or less, more preferably 8 μm or less, and particularly preferably 6 μm or less. When the thickness of the ultraviolet curable adhesive layer in the present invention is the above upper limit, when the substrate for a display device of the present invention is used for a display device, the optical path of light emitted from the backlight unit is shortened and light is emitted. Can be suppressed. Moreover, it is preferable that the thickness of the ultraviolet curable adhesive layer in this invention is 0.5 micrometer or more, for example. When the thickness of the ultraviolet curable adhesive layer in the present invention is the above lower limit, it is possible to sufficiently bond the color filter substrate and the optical functional member laminated through the ultraviolet curable adhesive layer.
In addition, the thickness of the ultraviolet curable adhesive layer in this invention can be measured by observing a cross section, for example using a scanning electron microscope (SEM).

The ultraviolet curable adhesive layer in the present invention is a member that transmits light emitted from the backlight portion when the display device substrate of the present invention is used in a display device. Therefore, the ultraviolet curable adhesive layer in the present invention preferably has a predetermined transparency. Here, “transparent” means transparent to the extent that light irradiated from the backlight portion is transmitted unless otherwise specified. For example, the total light transmittance of the ultraviolet curable adhesive layer is preferably 85% or more, and more preferably 90% or more.
The total light transmittance of the ultraviolet curable adhesive layer can be measured by a fully automatic direct reading haze computer (HGM-2DP) manufactured by Suga Test Instruments Co., Ltd.

The ultraviolet curable adhesive layer in the present invention may be a layer made of an ultraviolet curable resin and cured by ultraviolet irradiation. The ultraviolet curable resin used for the ultraviolet curable adhesive layer is not particularly limited as long as it is a material that can be cured by irradiating ultraviolet rays having a wavelength in the range of 100 nm to 450 nm, for example. For example, monofunctional monomers such as reactive ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone, and polyfunctional monomers, polymethylolpropane tri (meth) acrylate, hexanediol (meth) acrylate , Triethylene (polypropylene) glycol (meth) diacrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, Isocyanuric acid EO-modified diacrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, bisphenolfluorene derivative, Scan phenoxyethanol fluorene (meth) acrylate, bisphenol fluorene Epo Kiki (meth) acrylate. Here, (meth) acrylate is a notation meaning acrylate or methacrylate.
In the present invention, only one kind of these ultraviolet curable resins may be used, or two or more kinds may be mixed and used.

3. Optical Functional Member The optical functional member in the present invention is a member that is disposed on a substrate via an ultraviolet curable adhesive layer and has an optical functional layer in which a liquid crystal compound is aligned in one direction. Moreover, the optical function member may have an orientation layer in addition to the optical function layer.

The optical functional member in the present invention only needs to have at least one optical functional layer, and may have a configuration in which a plurality of optical functional layers and alignment layers described later are laminated. When the optical functional member has a configuration in which a plurality of optical functional layers and alignment layers are laminated, each layer can be laminated by transfer via an adhesive layer.
Hereinafter, the optical functional layer and the alignment layer constituting the optical functional member will be described.

(1) Optical functional layer The liquid crystalline compound contained in the optical functional layer in the present invention can exhibit desired optical characteristics by being oriented in one direction. Specific examples of the alignment state of the liquid crystalline compound include a state in which the liquid crystalline compound is aligned in the length direction of the optical functional layer and a state in which the liquid crystalline compound is aligned in the thickness direction of the optical functional layer. The former liquid crystal structure is referred to as a homogeneous structure (parallel alignment structure), and by having such a structure, the optical function layer can be optically imparted with properties as an A plate. The latter liquid crystal structure is called a homeotropic structure (vertical alignment structure), and by having such a structure, the optical function layer can be imparted with an optically positive C-plate property. Further, the alignment state of the liquid crystalline compound may be a cholesteric alignment state in which the liquid crystalline compound exhibits a regular helical structure. By having such an orientation state, the optical function layer can be imparted with an optically negative C-plate property.

  The thickness of the optical functional layer can be appropriately adjusted according to the type of liquid crystalline compound and the optical characteristics to be imparted to the optical functional layer, and is not particularly limited. For example, it is preferable that the in-plane retardation of the optical functional layer is formed within a range corresponding to λ / 4. The in-plane retardation value of the optical functional layer is, for example, preferably in the range of 100 nm to 160 nm, more preferably in the range of 110 nm to 150 nm, and still more preferably in the range of 120 nm to 140 nm. . When the thickness of the optical functional layer is set to a distance within the range where the in-plane retardation of the optical functional layer corresponds to λ / 4 minutes, the specific distance is determined by the optical functional layer described later. For example, when a general liquid crystal compound is used, the thickness of the optical functional layer can be in the range of 0.5 μm to 2 μm.

  The optical functional layer is a member that transmits light emitted from the backlight unit when the display device substrate of the present invention is used in a display device. Therefore, the optical functional layer in the present invention preferably has a predetermined transparency. Here, “transparent” means transparent to the extent that light irradiated from the backlight portion is transmitted unless otherwise specified. In addition, about the specific transmittance | permeability of an optical function layer, since it can be made the same as that of a general optical function layer, description here is abbreviate | omitted.

  The liquid crystalline compound contained in the optical functional layer is not particularly limited as long as it is a material that can impart desired optical functionality to the optical functional layer. Among these, a liquid crystalline compound exhibiting photosensitivity is preferable, and a liquid crystalline compound exhibiting a nematic phase is particularly preferably used. This is because nematic liquid crystals can be easily arranged regularly as compared with liquid crystal compounds exhibiting other liquid crystal phases.

  Moreover, it is preferable to use the polymeric liquid crystal material which has a polymerizable functional group for the liquid crystalline compound in this invention. This is because the polymerizable liquid crystal materials can be polymerized with each other via a polymerizable functional group, and thus the mechanical strength of the optical functional layer can be improved.

  Examples of such polymerizable functional groups include various polymerizable functional groups that are polymerized by the action of ionizing radiation such as ultraviolet rays and electron beams, or heat. Representative examples of the polymerizable functional group include a radical polymerizable functional group or a cationic polymerizable functional group. Further, representative examples of radically polymerizable functional groups include functional groups having at least one addition-polymerizable ethylenically unsaturated double bond, and specific examples include vinyl groups having or not having substituents, An acrylate group (generic name including an acryloyl group, a methacryloyl group, an acryloyloxy group, and a methacryloyloxy group) and the like can be given. Moreover, an epoxy group etc. are mentioned as a specific example of a cationically polymerizable functional group. In addition, examples of the polymerizable functional group include an isocyanate group and an unsaturated triple bond. Among these, from the viewpoint of the process, a functional group having an ethylenically unsaturated double bond is preferably used.

The polymerizable liquid crystal material may have a plurality of polymerizable functional groups or may have only one. Moreover, you may mix and use what has multiple polymerizable functional groups, and what has only one.
Specific examples of the polymerizable liquid crystal material include compounds described in JP-A-7-258638, JP-A-10-508882, and JP-A-2003-287623.

  One kind of liquid crystalline compounds as described above may be used, or two or more kinds thereof may be mixed and used. In the present invention, when two or more kinds of liquid crystal materials are mixed and used, a polymerizable liquid crystal material and a liquid crystal material having no polymerizable functional group may be mixed and used.

(2) Orientation layer In this invention, the optical function member may have an orientation layer. The alignment layer is a member containing a photo-alignment material.

  Here, the “photo-alignment material” included in the alignment layer refers to a material that can exhibit an alignment regulating force by a photo-alignment method. In addition, the “photo-alignment method” is a method of expressing the alignment regulating force (anisotropy) of the alignment layer by irradiating the alignment layer with light having an arbitrary polarization state (polarized light). Therefore, it can be said that the photo-alignment material in the present invention is a material that can exhibit an alignment regulating force by irradiating polarized light. Furthermore, the “alignment regulating force” means an interaction that aligns the liquid crystalline compounds contained in the optical functional layer described above.

The thickness of the alignment layer in the present invention can be adjusted according to the constituent materials. The thickness of the alignment layer in the present invention is, for example, preferably in the range of 0.01 μm to 0.5 μm, more preferably in the range of 0.02 μm to 0.1 μm, and particularly 0.03 μm to 0. It is preferable to be in the range of 0.05 μm. When the thickness of the alignment layer in this invention exists in the said range, desired alignment control power can be expressed with respect to the liquid crystalline compound contained in the optical function layer mentioned above.
In addition, the thickness of the alignment layer in this invention can be measured by observing a cross section, for example using a scanning electron microscope (SEM).

  The alignment layer in the present invention is a member that transmits light emitted from the backlight unit when the display device substrate of the present invention is used in a display device. Therefore, the alignment layer in the present invention preferably has a predetermined transparency. Here, “transparent” means transparent to the extent that light irradiated from the backlight portion is transmitted unless otherwise specified. In addition, about the specific transmittance | permeability of an orientation layer, since it can be made the same as that of a general orientation film, description here is abbreviate | omitted.

The alignment material included in the alignment layer is not particularly limited as long as it is a material that can exhibit an alignment regulating force by irradiating polarized light. Such photo-alignment materials are a photoisomerization material that reversibly changes the alignment regulation force by changing only the molecular shape by cis-trans change, and a photoreactive material that changes the molecule itself by irradiating polarized light. And can be broadly divided. In the present invention, any of a photoisomerization material and a photoreactive material can be suitably used, but it is more preferable to use a photoreactive material.
Since the photoreactive material is one in which molecules react with each other when polarized light is irradiated to express the alignment regulating force, it is possible to irreversibly express the alignment regulating force. Therefore, the photoreactive material is superior in the alignment control force in the temporal stability.

  The photoreactive material can be further classified according to the type of reaction caused by polarized light irradiation. Specifically, a photodimerization-type material that develops an alignment regulating force by causing a photodimerization reaction, a photocoupled material that develops an orientation regulating force by producing a photolysis reaction, and a photodecomposition reaction and a photobinding reaction. Can be divided into photodecomposition-bonding materials and the like that exhibit orientation regulating force. In the present invention, any of the above-mentioned photoreactive materials can be suitably used, but among them, it is preferable to use a photodimerization type material from the viewpoint of stability and reactivity (sensitivity).

  The photodimerization-type material is not particularly limited as long as it is a material that can exhibit an orientation regulating force by causing a photodimerization reaction. In the present invention, the wavelength of light that causes a photodimerization reaction is preferably 280 nm or more, particularly preferably in the range of 280 nm to 400 nm, and more preferably in the range of 300 nm to 380 nm. .

  Examples of such a photodimerization type material include cinnamate, coumarin, benzylidenephthalimidine, benzylideneacetophenone, diphenylacetylene, stilbazole, uracil, quinolinone, maleinimide, or a polymer having a cinnamylideneacetic acid derivative. In the present invention, among them, a polymer having at least one of cinnamate and coumarin, and a polymer having cinnamate and coumarin are preferably used. Specific examples of such a photodimerization type material include compounds described in, for example, JP-A-9-118717, JP-A-10-506420, and JP-A-2003-505561.

  The photo-alignment material used in the present invention may be only one type or two or more types.

4). Base material The base material in this invention is a member which supports each member mentioned above.
In addition, about the base material in this invention, since it can be the same as that of the content described in the item of "1. Functional layer (1) Color filter (a) Transparent base material" mentioned above, description here is abbreviate | omitted. To do.

5. Other Member The substrate for display device in the present invention may have other members as necessary in addition to the above-described functional layer, ultraviolet curable adhesive layer, optical functional member, and substrate. Examples of other members include a second functional layer disposed between the base material and the ultraviolet curable adhesive layer.
Hereinafter, the second functional layer will be described.

  As for the 2nd functional layer in this invention, a color filter, a touch panel, a decorating member, etc. are mentioned, for example. The second functional layer may be composed of a single layer or may be composed of two or more layers.

FIG. 5A to FIG. 5C are schematic cross-sectional views showing an example of the base material for a display device of the present invention having the second functional layer. 5A shows the display device substrate 10 when the second functional layer is the color filter 20, and FIG. 5B shows the display device substrate when the second functional layer is the touch panel 30. 5 (c) shows the display device substrate 10 when the second functional layer is the decorative member 40, and FIG. 5 (d) shows the second functional layer as the decorative member 40. And the base material 10 for display apparatuses in the case of being the color filter 20 is shown.
As shown in FIGS. 5A to 5D, when the second functional layer is included, the base material 1 and the transparent base materials 21, 31, and 41 in the second functional layer can be used as a common member. .
In addition, about the code | symbol which is not demonstrated in FIG. 5, since it can be the same as that of FIGS. 1-3, description here is abbreviate | omitted.

6A to 6C are schematic cross-sectional views showing other examples of the display device substrate of the present invention having the second functional layer. FIG. 6A shows a substrate 1, a second functional layer (touch panel 30), an ultraviolet curable adhesive layer 2, an optical functional member 11 having an optical functional layer 3 and an alignment layer 4, and a functional layer 5 (color filter 20). ) Shows the substrate 10 for a display device laminated in this order. FIG. 6B shows the substrate 1, the second functional layer (decorating member 40), the ultraviolet curable adhesive layer 2, and the optical functional layer. 3 and the optical functional member 11 having the alignment layer 4 and the functional layer 5 (color filter 20) show the display device substrate 10 laminated in this order, and FIG. , The second functional layer (touch panel 30), the ultraviolet curable adhesive layer 2, the optical functional member 11 having the optical functional layer 3 and the alignment layer 4, and the functional layer 5 (the protective unit 50 and the color filter 20) in this order. The base material 10 for display apparatuses laminated | stacked is shown. As shown in FIG. 6C, when the functional layer 5 is composed of, for example, two members of the protection unit 50 and the color filter 20, the transparent base material 21 of the protection unit 50 and the color filter 20 is used as a common member. Can be used as
In addition, about the code | symbol which is not demonstrated in FIG. 6, since it can be the same as that of FIGS. 1-3, description here is abbreviate | omitted.

FIG. 7 is a schematic cross-sectional view showing another example of the base material for a display device of the present invention having the second functional layer. FIG. 7 shows the substrate 1, the second functional layer (touch panel 30, decorating member 40), the ultraviolet curable adhesive layer 2, the optical functional member 11 having the optical functional layer 3 and the alignment layer 4, and the functional layer 5 (color). The filter 20) shows the display device substrate 10 laminated in this order. As shown in FIG. 7, when the second functional layer is composed of two members, for example, the touch panel 30 and the decorative member 40, the transparent base materials 31 and 41 of both members and the insulating layer 33 of both members. And the protection part 43 can be used as a common member.
In addition, about the code | symbol which is not demonstrated in FIG. 7, since it can be the same as that of FIGS. 1-3, description here is abbreviate | omitted.

  In addition, about the color filter used as a 2nd functional layer, a touch panel, and a decoration member, since it can be made to be the same as that of the content described in the term of "1. functional layer" mentioned above, description here is abbreviate | omitted. .

6). The manufacturing method of the base material for display apparatuses The manufacturing method of the base material for display apparatuses of this invention should just be a method which can obtain the base material for display apparatuses on which each member mentioned above was laminated | stacked, and is not specifically limited.

  For example, the method of forming an optical function member and a functional layer in order on a base material through an ultraviolet curable adhesive layer is mentioned. When such a method is used, for example, as shown in FIGS. 3A to 3C and FIG. 6C, the optical function member 11 has a protective part 50, and the protective part 50 is Thus, the display device substrate 10 having various functional layers 5 is obtained. That is, in this case, an ultraviolet curable adhesive layer is usually not required between the functional layer and the optical functional member.

  Further, for example, a method in which an optical functional member and an ultraviolet curable adhesive layer are formed in this order on the functional layer, and a substrate is bonded onto the optical functional member through the ultraviolet curable adhesive layer can be mentioned. In this case, an ultraviolet curable adhesive layer is usually not required between the functional layer and the optical functional member.

  Furthermore, in the case of using a transfer method, for example, a method as shown in FIGS. That is, as shown in FIG. 8A, the transfer functional layer forming step for forming the functional layer 5 on the transfer base 6, and on the base 1 as shown in FIG. An optical functional member forming step for forming the optical functional member 11 having the optical functional layer 3 and the alignment layer 4 via the ultraviolet curable adhesive layer 2, and a functional layer in the functional layer for transfer as shown in FIG. 5 and the alignment layer 4 are bonded to each other via the ultraviolet curable adhesive layer 2 and, as shown in FIG. 8D, for a display device having a peeling step of peeling the transfer substrate 6. The manufacturing method of a base material is mentioned. In this case, usually, an ultraviolet curable adhesive layer is disposed between the functional layer and the optical functional member.

  In the optical functional member forming step in the present invention, an ultraviolet curable adhesive layer is disposed on a substrate, an optical functional layer is disposed on the ultraviolet curable adhesive layer, and then the ultraviolet curable adhesive layer is irradiated with ultraviolet rays. A curing step is preferred.

Moreover, the bonding process in this invention may arrange | position an ultraviolet curable adhesive layer on an optical function member, and may arrange | position an ultraviolet curable adhesive layer on a functional layer. Further, the bonding step in the present invention is a method in which the functional layer of the transfer functional layer and the optical functional member formed on the substrate are bonded via an ultraviolet curable adhesive layer, and then irradiated with ultraviolet rays for ultraviolet curing. A step of curing the mold adhesive layer is preferable. By irradiating ultraviolet rays in the bonding step to cure the ultraviolet curable adhesive layer, it becomes easy to selectively peel off only the transfer substrate in the subsequent peeling step.
In addition, it is preferable that the irradiation of the ultraviolet-ray performed in a bonding process serves as the irradiation of the ultraviolet-ray performed in the optical function layer formation process mentioned above. This is because ultraviolet irradiation in the optical functional member forming step can be omitted.

  Moreover, in this invention, when it has a 2nd functional layer, it can form also by the transfer method about the laminated body of a base material, a 2nd functional layer, an ultraviolet curable adhesive layer, and an optical functional member. That is, the laminate is formed by a method in which an optical functional member is formed on a transfer substrate, the optical functional layer and the second functional layer are bonded via an ultraviolet curable adhesive layer, and the transfer substrate is peeled off. Can be formed.

  In the manufacturing method described above, the forming method of each member constituting the substrate for a display device is the same as the forming method of the functional layer and the forming method of the optical functional member such as a general color filter, a touch panel, and a decorative member. The description here is omitted. For example, the method described in Unexamined-Japanese-Patent No. 2015-31863 and Unexamined-Japanese-Patent No. 2012-108563 is mentioned.

7). Display device As a display device using the base material for display device of the present invention, for example, a base material, an ultraviolet curable adhesive layer disposed on one surface side of the base material, and the ultraviolet curable adhesive layer are provided. An optical functional member having an optical functional layer disposed on the substrate and having a liquid crystal compound oriented in one direction, and disposed on the surface of the optical functional member opposite to the ultraviolet curable adhesive layer. And a counter substrate disposed on the surface of the functional layer opposite to the ultraviolet curable adhesive layer.

  FIG. 9 is a schematic cross-sectional view showing an example of a liquid crystal display device using the display device substrate of the present invention. As shown in FIG. 9, a liquid crystal display device 100 according to the present invention is disposed on a base material 1, an ultraviolet curable adhesive layer 2 disposed on the base material 1, and an ultraviolet curable adhesive layer 2, and has an optical function. An optical functional member 11 having an alignment layer 4 disposed on the layer 3 and the optical functional layer 3, a functional layer 5 disposed on the optical functional member 11, and a counter substrate 7 disposed on the functional layer 5. Have In addition, when a display apparatus is an organic electroluminescent display apparatus, for example, an opposing base material turns into an organic electroluminescent element base material.

  In addition, about the base material for display apparatuses used for the display apparatus in this invention, it shall be the same as the content described in the item of "1. Functional layer"-"6. Manufacturing method of base material for display apparatuses" mentioned above. The description here is omitted. Moreover, about the opposing base material used for the base material for display apparatuses in this invention, since it can be made to be the same as that used for a general display apparatus, description here is abbreviate | omitted.

8). Use The base material for display apparatuses of this invention can be used for a display apparatus. Examples of the display device include an organic electroluminescence display device, a liquid crystal display device, and electronic paper. In the present invention, it is preferable to use a substrate for a display device for the organic electroluminescence display device.

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

[Example 1]
A liquid crystal display device having the display device substrate of the present invention was produced as follows.

(Preparation of curable resin composition)
The polymerization tank is charged with 63 parts by weight of methyl methacrylate (MMA), 12 parts by weight of acrylic acid (AA), 6 parts by weight of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by weight of diethylene glycol dimethyl ether (DMDG). After stirring and dissolving, 7 parts by weight of 2,2′-azobis (2-methylbutyronitrile) was added and dissolved uniformly. Then, it stirred at 85 degreeC under nitrogen stream for 2 hours, and also was made to react at 100 degreeC for 1 hour. Further, 7 parts by weight of glycidyl methacrylate (GMA), 0.4 parts by weight of triethylamine, and 0.2 parts by weight of hydroquinone were added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours to obtain a copolymer resin solution ( A solid content of 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition>
-16 parts by weight of the above copolymer resin solution (solid content: 50%)-24 parts by weight of dipentaerythritol pentaacrylate (Sartomer SR399)-4 parts by weight of orthocresol novolac-type epoxy resin (Epika Shell Epoxy Epicoat 180S70) -Methyl-1- (4-methylthiophenyl) -2-morpholinopropan-1-one
4 parts by weight • 52 parts by weight of diethylene glycol dimethyl ether

[Formation of second functional layer (color filter)]
(Formation of light shielding part)
First, the following components were mixed and sufficiently dispersed in a sand mill to prepare a black pigment dispersion.

<Composition of black pigment dispersion>
・ Black pigment 23 parts by weight ・ Polymer dispersing agent (Big Chemie Japan Co., Ltd. Disperbyk 111) 2 parts by weight ・ Solvent (diethylene glycol dimethyl ether) 75 parts by weight

Next, the components of the following amounts were sufficiently mixed to obtain a light shielding part composition.
<Composition of composition for light shielding part>
-61 parts by weight of the black pigment dispersion-20 parts by weight of the curable resin composition-30 parts by weight of diethylene glycol dimethyl ether

(Formation of light shielding part)
The light shielding part composition was applied on a 0.7 mm thick glass substrate (Asahi Glass Co., Ltd. AN material) with a spin coater and dried at 100 ° C. for 3 minutes to form a light shielding layer having a thickness of about 1 μm. The light-shielding layer is exposed to a light-shielding pattern (repetition of RGB with a 75 μm pitch stripe shape) with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution. Heat treatment was performed by leaving it for 30 minutes to form a light-shielding portion having a plurality of openings.

(Formation of colored parts)
A red curable resin composition having the following composition is applied onto the glass substrate on which the light-shielding part is formed as described above by a spin coating method (application thickness: 2.0 μm), and then dried in an oven at 70 ° C. for 3 minutes. did. Next, a photomask is placed at a distance of 100 μm from the coating film of the red curable resin composition, and ultraviolet rays are applied only to the region corresponding to the colored region formation region using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Irradiated for 10 seconds. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali development was carried out, and only the uncured part of the coating film of a red curable resin composition was removed. Thereafter, the substrate was left in an atmosphere at 230 ° C. for 25 minutes to perform heat treatment to form a red relief pattern (red colored portion) in the opening of the light shielding portion.
Next, the green relief pattern (green coloring part) was formed in the opening part of the light-shielding part by the process similar to red relief pattern formation using the green curable resin composition of the following composition.
Furthermore, using the blue curable resin composition having the following composition, a blue relief pattern (blue colored portion) was formed in the opening of the light shielding portion by the same process as the formation of the red relief pattern.

(Formation of protection part)
Thereafter, the curable resin composition described above as a protective part was applied by a spin coating method and dried to form a coating film. A photomask was placed at a distance of 100 μm from the coating film of the curable resin composition, and only the spacer formation region was irradiated with ultraviolet rays for 10 seconds using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed. Thereafter, the substrate was left to stand in an atmosphere at 230 ° C. for 30 minutes to perform heat treatment to form a protective part.
In this way, a color filter was obtained.

<Composition of red curable resin composition>
・ C. I. 7 parts by weight of Pigment Red 254 3 parts by weight of a polysulfonic acid type polymer dispersant 23 parts by weight of the curable resin composition 67 parts by weight of 3-methoxybutyl acetate

<Composition of green curable resin composition>
・ C. I. Pigment Green 58 7 parts by weight C.I. I. Pigment Yellow 138 1 part by weight, polysulfonic acid type polymer dispersant 3 parts by weight, the curable resin composition 22 parts by weight, and 3-methoxybutyl acetate 67 parts by weight

<Composition of blue curable resin composition>
・ C. I. Pigment Blue 1 5 parts by weight, polysulfonic acid type polymer dispersant 3 parts by weight, the curable resin composition 25 parts by weight, and 3-methoxybutyl acetate 67 parts by weight

[Formation of optical functional members for transfer]
A photo-alignment film composition containing a photo-alignment material having a polyvinyl cinnamate (PVCi) group on a transfer substrate so that the film thickness after curing is about 1.5 μm (PGME is used as a solvent) Was applied by a die coating method.
And it was made to dry for 2 minutes within the dryer adjusted to 90 degreeC, the solvent was evaporated, and the composition was thermosetted, and the photo-alignment film (alignment layer) was formed.
On top of that, a liquid crystal composition containing a liquid crystal compound exhibiting a photopolymerizable nematic phase and a photopolymerization initiator (solid content 30%, using MIBK as a solvent) is applied by a die coating method and dried to be 1 μm. A liquid crystal layer was formed to obtain a transfer film having an optical functional layer.
Thereafter, an ultraviolet curable adhesive layer having a thickness of 3 μm was formed on the optical functional layer side surface of the obtained optical functional member for transfer.

[Bonding process, peeling process]
The colored portion side of the obtained color filter and the ultraviolet curable adhesive layer formed on the transfer optical functional member were bonded so that air did not enter. Thereafter, ultraviolet rays were irradiated from the surface on the optical functional member side to cure the ultraviolet curable adhesive layer.
Thereafter, the transfer substrate was peeled off.

[Formation of functional layer (protection part)]
After forming a laminate having a color filter, an ultraviolet curable adhesive layer and an optical functional layer as described above, the curable resin composition described above is formed on the surface of the optical functional layer opposite to the ultraviolet curable adhesive layer. Was applied by spin coating and dried to form a coating film. A photomask was placed at a distance of 100 μm from the coating film of the curable resin composition, and only the spacer formation region was irradiated with ultraviolet rays for 10 seconds using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed. Thereafter, the substrate was left to stand in an atmosphere at 230 ° C. for 30 minutes to perform heat treatment to form a protective part.

  Thus, the base material for display apparatuses of this invention was obtained.

[Production of liquid crystal display devices]
An alignment layer was formed on the surface of the protective part of the display device substrate obtained as described above. Next, a thin film transistor was formed on the glass substrate, and a necessary amount of IPS liquid crystal was dropped. Then, while sandwiching the liquid crystal, the thin film transistor and the substrate on the alignment layer side of the substrate for display device are overlapped with each other by being exposed at a dose of 400 mJ / cm ² to form a cell, A backlight unit was installed. Finally, a pattern retarder was separately formed on the base material and bonded to the surface opposite to the backlight portion to produce a liquid crystal display device.

[Example 2]
A liquid crystal display device having the substrate for a display device of the present invention was produced in the same manner as in Example 1 except that the formation of the second functional layer, the bonding step, and the peeling step were performed as follows.

[Formation of second functional layer (decorative member)]
First, the following materials were mixed and sufficiently dispersed with a sand mill to prepare a black pigment dispersion.
<Composition of black pigment dispersion>
・ Black pigment 23 parts by weight ・ Polymer dispersant (Bicchemy Japan Co., Ltd. Disperbyk 111) 2 parts by weight ・ Solvent (diethylene glycol dimethyl ether) 75 parts by weight

Next, the following materials were stirred and mixed at room temperature to prepare a decorative part forming composition.
<Composition of composition for decorating part formation>
-61 parts by weight of the black pigment dispersion-20 parts by weight of the curable resin composition-30 parts by weight of diethylene glycol dimethyl ether

  The decorative part forming composition was applied on a 0.7 mm thick glass substrate (Asahi Glass Co., Ltd. AN material) with a spin coater and dried at 100 ° C. for 3 minutes to form a decorative layer having a thickness of about 1 μm. . The decorative layer is exposed to a light-shielding pattern (repetition of RGB with a 75 μm pitch stripe shape) with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution. For 30 minutes, a heat treatment was applied to form a patterned decorative portion.

  The curable resin composition described above was applied and dried by a spin coating method so as to cover the decorated part obtained as described above, thereby forming a coating film. A photomask was placed at a distance of 100 μm from the coating film of the curable resin composition, and only the spacer formation region was irradiated with ultraviolet rays for 10 seconds using a 2.0 kW ultrahigh pressure mercury lamp by a proximity aligner. Subsequently, it was immersed in 0.05 wt% potassium hydroxide aqueous solution (liquid temperature 23 degreeC) for 1 minute, and alkali image development was carried out, and only the uncured part of the coating film of curable resin composition was removed. Thereafter, the substrate was left in an atmosphere of 230 ° C. for 30 minutes to perform a heat treatment to form a protective part, thereby obtaining a decorative member.

[Bonding process, peeling process]
The decorative part side of the obtained decorative member and the ultraviolet curable adhesive layer formed on the optical function member for transfer obtained by the same method as in Example 1 are pasted so that air does not enter. Combined. Thereafter, ultraviolet rays were irradiated from the surface on the optical functional member side to cure the ultraviolet curable adhesive layer.
Thereafter, the transfer substrate was peeled off.

[Example 3]
A liquid crystal display device having the substrate for a display device of the present invention was produced in the same manner as in Example 1 except that the formation of the second functional layer, the bonding step, and the peeling step were performed as follows.

[Formation of second functional layer (touch panel)]
On the transparent base material, in a region corresponding to the non-display region of the display device, extraction wirings and external connection terminals made of ITO were formed in a pattern by a photolithography method. Next, a transparent electrode layer made of ITO is formed in a pattern on the refractive index adjustment layer in the active area by photolithography, and a sensor electrode having a first electrode 8a and a second electrode 8b as shown in FIG. 8 and a second conductive portion were formed. The thickness of the transparent electrode layer was 1300 mm. Next, an insulating layer was formed so as to cover the second conductive portion, and the first conductive portion was formed on the insulating layer.
Thus, a touch panel having a wiring layer and a sensor electrode was formed.

[Bonding process, peeling process]
The sensor electrode side of the obtained touch panel and the ultraviolet curable adhesive layer formed on the optical functional member for transfer obtained by the same method as in Example 1 were bonded so that air did not enter. Thereafter, ultraviolet rays were irradiated from the surface on the optical functional member side to cure the ultraviolet curable adhesive layer.
Thereafter, the transfer substrate was peeled off.

[Example 4]
Example 1 except that the ultraviolet curable adhesive layer was not formed on the optical functional layer side surface of the transfer optical functional member, and the colored portion side surface of the color filter was formed with the ultraviolet curable adhesive layer. Thus, a liquid crystal display device was produced. The ultraviolet curable adhesive layer was obtained by applying an ultraviolet curable resin by a spin coating method (application thickness: 3.0 μm) and then drying in an oven at 70 ° C. for 3 minutes.

[Comparative Example 1]
A liquid crystal display device was produced in the same manner as in Example 1 except that the optical functional member was directly formed on the color filter.

That is, the light containing the photo-alignment material having the polyvinyl cinnamate (PVCi) group so that the film thickness after curing is about 1.5 μm after producing the color filter having the protective part as in Example 1. An alignment film composition (using PGME as a solvent) was applied by a die coating method.
And it was made to dry for 2 minutes within the dryer adjusted to 90 degreeC, the solvent was evaporated, and the composition was thermosetted, and the photo-alignment film (alignment layer) was formed.
On top of that, a liquid crystal composition containing a liquid crystal compound exhibiting a photopolymerizable nematic phase and a photopolymerization initiator (solid content 30%, using MIBK as a solvent) is applied by a die coating method and dried to be 1 μm. A liquid crystal layer was formed, and an optical functional layer was formed.

[Comparative Example 2]
A liquid crystal display device was produced in the same manner as in Example 1 except that, in the transfer optical functional member forming step, a pressure-sensitive adhesive layer having a thickness of 20 μm was formed on the surface of the transfer optical functional member on the optical functional layer side. .

[Evaluation]
The liquid crystal display devices obtained in Examples 1 to 4 and Comparative Examples 1 and 2 were evaluated for heat resistance and presence / absence of display unevenness. Specifically, the evaluation was performed as follows.
・ Heat resistance ○: No change in appearance ×: Change in appearance (smoothness occurs) ・ Display unevenness ○: A liquid crystal display is sandwiched between two polarizing plates, from one polarizing plate to the other polarizing plate There is no unevenness in the transmitted light when transmitting the light. ×: Transmitted light when the liquid crystal display device is sandwiched between the two polarizing plates and the light is transmitted from one polarizing plate to the other polarizing plate. The results are shown in Table 1.

  As shown in Table 1, display unevenness did not occur in the liquid crystal display devices of Examples 1 to 4, but display unevenness occurred in the liquid crystal display device of Comparative Example 1. From this result, the following was found. That is, the liquid crystal display device of Comparative Example 1 has a configuration in which a functional layer, an optical functional layer, and a second functional layer are laminated in this order. In such a configuration, the optical functional member is directly formed on the functional layer. However, a malfunction occurs in the functional layer due to heat treatment or the like in the manufacturing process of the optical functional member, and the display characteristics are deteriorated. On the other hand, it has been found that the liquid crystal display device of the present invention can suppress the deterioration in display characteristics as described above by having an ultraviolet curable adhesive layer between the functional layer and the optical functional member.

  As shown in Table 1, the liquid crystal display devices of Examples 1 to 4 exhibited excellent heat resistance, but the liquid crystal display device of Comparative Example 2 did not have the desired heat resistance. This is probably because the ultraviolet curable adhesive layers used in Examples 1 to 4 have superior heat resistance compared to the pressure-sensitive adhesive layer used in Comparative Example 2.

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Ultraviolet curable adhesive layer 3 ... Optical functional layer 4 ... Orientation layer 5 ... Functional layer 10 ... Base material for display apparatuses 11 ... Optical functional member 20 ... Color filter 30 ... Touch panel 40 ... Decorating member

Claims (5)

A substrate;
An ultraviolet curable adhesive layer disposed on one side of the substrate;
An optical functional member having an optical functional layer disposed on the substrate via the ultraviolet curable adhesive layer and having a liquid crystal compound oriented in one direction;
A substrate for a display device, comprising: a functional layer disposed on a surface of the optical functional member opposite to the ultraviolet curable adhesive layer.   The display device substrate according to claim 1, further comprising a second functional layer between the substrate and the ultraviolet curable adhesive layer. The functional layer is a transparent substrate, a light-shielding portion having a plurality of openings disposed on the transparent substrate, and a color filter having a colored portion disposed in the openings,
The display device substrate according to claim 1, wherein a surface of the color filter on the colored portion side is disposed so as to face the optical function member. The functional layer is a transparent substrate, a touch panel having a sensor electrode disposed on the transparent substrate,
The substrate for a display device according to claim 1, wherein a surface of the touch panel on the sensor electrode side is disposed so as to face the optical function member. The functional layer is a decorative member having a transparent base material, a decorative portion arranged on the transparent base material,
The display device substrate according to claim 1, wherein a surface of the decorative member on the side of the decorative portion is disposed so as to face the optical function member.