JP6716912B2 - Substrate for display device - Google Patents

Description

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

In recent years, with the development of personal computers, especially portable personal computers, the demand for display devices has increased. In addition, recently, the penetration rate of home-use liquid crystal televisions has been increasing, and smartphones and tablet terminals are also becoming widespread. Therefore, the market of display devices is expanding more and more.

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 further has a light source called a backlight unit. For example, Patent Documents 1 and 2 propose a configuration including an alignment layer containing a photo-alignment material and an optical functional layer in which a liquid crystalline compound is aligned in one direction. When the display device includes the optical function layer, it is possible to solve the problem of the viewing angle dependency.

As a configuration of the display device base material having the optical functional layer, for example, as shown in FIG. 8A, a transparent base material 21, a colored portion 22 (here, a red colored portion 22R, a green colored portion 22G, a blue portion). An in-cell type including a color filter 20 having a colored portion 22B) and a light shielding portion 23, and an optical functional member 11 disposed on the colored portion 22 side of the color filter 20 and having an optical functional layer 3 and an alignment layer 4. As shown in FIG. 8B, on the transparent substrate 21 side of the color filter 20, an optical functional member disposed on the substrate 1 ′ via the adhesive layer 2 ′ and having the optical functional layer 3 and the alignment layer 4. There is an out-cell type with 11. 8A and 8B 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 arranged 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 dispose the optical functional member formed on the base material in the color filter, and therefore, the base material for supporting the optical functional member. It is possible to reduce the total thickness as compared with the out-cell type without requiring

JP2012-198522A JP, 2013-3344, A JP, 2013-228654, A

By the way, in the in-cell type display device, for example, as shown in FIG. 8A, the optical functional member 11 having the optical functional layer 3 and the alignment layer 4 is directly formed on the colored portion 22 of the color filter 20. There are cases where However, when the optical functional layer 3 and the alignment layer 4 are directly formed on the colored portion of the color filter, there is a problem that the productivity is reduced as compared with the case where the optical functional members formed in advance are laminated. In addition, there is a problem in that a coloring step which is in direct contact with the optical part has a problem due to a heating step when forming the optical functional member. The above problem similarly occurs when the color filter is another functional layer such as a touch panel or a decorative member.

Then, the inventors of the present invention, for example, as shown in FIG. 9, a method of transferring the color filter 20 and the optical functional member 11 having the optical functional layer 3 and the alignment layer 4 via the adhesive layer 2 ′. I 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. Further, it has been found that it is possible to suppress the occurrence of defects caused by heating the colored portion of the color filter.

However, the inventors of the present invention have made extensive studies and discovered the following new problems.
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 in that the optical functional member adjacent to the adhesive layer is deteriorated due to heating when manufacturing the display device. Further, the thickness of the adhesive layer using the pressure-sensitive adhesive becomes relatively thick as 10 μm or more, which makes it difficult to reduce the thickness of the display device.

The present invention has been made in view of the above circumstances, and a main object of the present invention is to provide a base material for a display device capable of reducing the thickness of the display device and suppressing deterioration of the optical functional member. To do.

As a result of earnest research to solve the above problems, the inventors of the present invention, in place of the pressure-sensitive adhesive that has been conventionally used as an adhesive layer, an ultraviolet curable resin composed of an ultraviolet curable resin. By using the adhesive layer, it is possible to suppress the deterioration of the adjacent optical functional member, reduce the thickness of the adhesive layer as compared with the conventional one, and obtain the finding that the display device can be thinned. It was The inventors of the present invention have completed the present invention based on such knowledge.

That is, the present invention, a base material, a functional layer arranged on one surface side of the base material, an ultraviolet curable adhesive layer arranged on the surface of the functional layer opposite to the base material, Provided is a base material for a display device, which comprises an optical functional member having an optical functional layer in which a liquid crystalline compound is oriented in one direction, the optical functional member being disposed on the functional layer via the ultraviolet curable adhesive layer. To do.

According to the present invention, it is possible to solve the problem that the optical functional layer adjacent to the UV-curable adhesive layer is deteriorated by the heating when manufacturing the display device by using the UV-curable adhesive layer. It can be used as a base material for various display devices. Further, the base material for a display device can be made thinner than a conventional adhesive layer using a pressure-sensitive adhesive, and the display device can be thinned.

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 opening, It is preferable that the surface of the filter on the colored portion side is arranged 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 transparent base material, a touch panel having a sensor electrode arranged on the transparent base material, and a surface of the touch panel on the sensor electrode side faces the optical functional member. Are preferably arranged in When the functional layer is a touch panel, it can be used as a display device base material having a touch panel function.

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

INDUSTRIAL APPLICABILITY The present invention has an effect that a display device can be thinned and can be used as a display device base material capable of suppressing deterioration of an optical functional member.

It is a schematic sectional drawing which shows an example of the base material for display devices of this invention. It is a schematic sectional drawing which shows the other example of the base material for display devices of this invention. It is a schematic sectional drawing which shows the other example of the base material for display devices of this invention. It is a schematic sectional drawing which shows the other example of the base material for display devices of this invention. It is a schematic sectional drawing which shows the other example of the base material for display devices of this invention. It is a schematic process drawing which shows an example of the manufacturing method of the base material for display devices of this invention. It is a schematic sectional drawing which shows an example of the display device using the base material for display devices of this invention. It is a schematic sectional drawing which shows an example of the conventional base material for display devices. It is a schematic sectional drawing which shows the other example of the conventional base material for display devices.

Hereinafter, the display substrate will be described.

The display device base material of the present invention is a base material, a functional layer disposed on one surface side of the base material, and an ultraviolet curable type disposed on the surface of the functional layer opposite to the base material. A member comprising an adhesive layer and an optical functional member having an optical functional layer disposed on the functional layer via the ultraviolet curable adhesive layer and having a liquid crystalline compound oriented in one direction. ..

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

FIG. 2 is a schematic cross-sectional view showing another example of the display device base material of the present invention. As shown in FIG. 2, the substrate 10 for a display device of the present invention is opposite to the substrate 1, the color filter 20 disposed on one surface side of the substrate 1, and the substrate 1 of the color filter 20. Of the ultraviolet curable adhesive layer 2 disposed on the side surface, the optical functional layer 3 disposed on the color filter 20 via the ultraviolet curable adhesive layer 2 and having the liquid crystal compound aligned in one direction, and the alignment layer. 4, the color filter 20 includes a transparent base material 21, a first light-shielding portion 23 that is disposed on the transparent base material 21 and has a plurality of openings, and a color disposed in the openings. The portion 22 (here, the red colored portion 22R, the green colored portion 22G, and the blue colored portion 22B) is included. Further, in FIG. 2, the base material 1 and the transparent base material 21 in the color filter 20 are used as a common member. 2 is an example in which the functional layer 5 in FIG. 1 is the color filter 20.

FIG. 3 is a schematic cross-sectional view showing another example of the display device base material of the present invention. As shown in FIG. 3, the display device base material 10 of the present invention includes a base material 1, a touch panel 30 disposed on one surface side of the base material 1, and a touch panel 30 opposite to the base material 1 side. A UV curable adhesive layer 2 disposed on the surface, an optical functional layer 3 disposed on the touch panel 30 via the UV curable adhesive layer 2 and having a liquid crystal compound aligned in one direction, and an alignment layer 4. The touch panel 30 includes the optical functional member 11 and the transparent base material 31, the sensor electrode 32 arranged on the transparent base material 31, and the insulating layer 33 arranged so as to cover the sensor electrode 32. Further, in FIG. 3, the base material 1 and the transparent base material 31 in the touch panel 30 are used as a common member. Note that FIG. 3 is an example in which the functional layer 5 in FIG. 1 is the touch panel 30.

FIG. 4 is a schematic sectional view showing another example of the display device base material of the present invention. As shown in FIG. 4, the display device base material 10 of the present invention includes a base material 1, a decorating member 40 arranged on one surface side of the base material 1, and a base material 1 of the decorating member 40. Is arranged on the color filter 20 via the ultraviolet curable adhesive layer 2 and the optical functional layer 3 in which the liquid crystal compound is oriented in one direction, The optical functional member 11 having the alignment layer 4 is provided, and the decoration member 40 is arranged so as to cover the transparent base material 41, the decoration portion 42 arranged on the transparent base material 41, and the decoration portion 42. The protective portion 43 is provided. Moreover, in FIG. 4, the base material 1 and the transparent base material 41 in the decoration member 40 are used as a common member. 4 is an example in which the functional layer 5 in FIG. 1 is the decorative member 40.

According to the present invention, by using the UV-curable adhesive layer, heating at the time of manufacturing the display device causes a problem that the optical functional member adjacent to the UV-curable adhesive layer, particularly the optical functional layer, is deteriorated. It can be a substrate for a display device that can be solved. The reason for this may be as follows.
That is, in the case of an adhesive layer using a conventional pressure-sensitive adhesive, the pressure-sensitive adhesive exhibits fluidity due to heating when manufacturing a display device, and the pressure-sensitive adhesive permeates an adjacent optical functional layer. Such a problem occurs. In this case, the impregnated pressure-sensitive adhesive disturbs the orientation of the liquid crystal compound that constitutes the optical functional layer, which makes it difficult for the optical functional layer to exert a desired optical function. On the other hand, the ultraviolet curable resin forming the ultraviolet curable adhesive layer has a property of being cured by irradiation of ultraviolet rays. Therefore, the cured ultraviolet curable adhesive layer is less likely to exhibit fluidity due to heating when manufacturing a display device, and can suppress the occurrence of defects such as penetration into an adjacent optical functional member, particularly the optical functional layer. Therefore, it is considered that the above-mentioned problems can be solved.

Further, according to the present invention, by using the ultraviolet curing adhesive layer, it is possible to make the thickness thinner than the adhesive layer using the conventional pressure-sensitive adhesive, and it is possible to thin the display device. It can be used as a base material for various display devices. The reason for this may be as follows.
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, 10 μm or more. On the other hand, in the present invention, instead of the pressure-sensitive adhesive that has been used conventionally, by using an ultraviolet-curable adhesive layer composed of an ultraviolet-curable resin, the thickness of the adhesive layer is thinner than before. Therefore, it is considered that the base material for a display device can be used, and the display device can be thinned.

Further, according to the present invention, since the optical functional member is disposed on the outermost surface of the display device base material, after the functional layer is formed on the base material, the optical functional member is transferred onto the functional layer. Can be arranged by. Therefore, it is possible to suppress the occurrence of a defect such as deterioration of the optical functional member due to the heat treatment or the like performed when forming the functional layer.

Hereinafter, each member constituting the substrate for a display device of the present invention, a method for manufacturing a substrate for a display device, and a display device using the substrate for a display device will be described.

1. Functional Layer The functional layer in the present invention is a member arranged on one surface side of the base material.

The functional layer in the present invention is a functional member that constitutes a display device, and can be appropriately selected as necessary. Examples of the functional layer include a color filter, a touch panel, a decorative member, and the like. Further, the functional layers such as the color filter, the touch panel and the decorative member may have a transparent base material or may not have a transparent base material. When it has a transparent substrate, the functional layer can be formed by a transfer method, and when it does not have a transparent substrate, the functional layer can be directly formed.
Furthermore, in the present invention, the above-mentioned functional layer may be used as a single layer, or two or more layers may be used in combination.

When the functional layer in the present invention is a color filter, when the display device base material of the present invention is used in a display device, due to the spread of light emitted from the backlight part, light leakage to an adjacent colored part may occur. It is possible to suppress the occurrence of parallax and the occurrence of display parallax and color mixture.
Specifically, for example, as shown in FIG. 5, when the display device substrate 10 of the present invention is used in a display device, the light emitted from the backlight unit is directed to the display device in a direction indicated by an arrow. It will pass through the substrate. At this time, if an adhesive layer using a conventional pressure-sensitive adhesive is used, the thickness of the adhesive layer increases, and the optical path of the light emitted from the backlight unit, that is, from the liquid crystal layer to the color filter 20 (not shown). The distance becomes longer, and the light easily spreads as shown by the arrow in FIG. In this way, when the light emitted from the backlight unit spreads, the light leaks to the colored portion adjacent to the colored portion to which the light should pass in the color filter, resulting in display parallax and color mixture. Challenges arise.
On the other hand, in the present invention, by using an ultraviolet-curable adhesive layer as the adhesive layer instead of the conventional pressure-sensitive adhesive, it becomes possible to make the thickness of the adhesive layer thinner than in the conventional case. Therefore, when the display device base material of the present invention is used in a display device, it is possible to shorten the optical path of the light emitted from the backlight unit and suppress the spread of the light, and display parallax and color mixture occur. Can be suppressed.
The display device substrate shown in FIG. 5 is an example in which an alignment layer is provided on the surface of the optical functional layer opposite to the UV-curable adhesive layer side.

Hereinafter, a color filter, a touch panel, a decorating member, and a protective portion will be described as specific examples of the functional layer in the present invention.

(1) Color Filter The color filter in the invention has a transparent base material, a light-shielding portion which is arranged on the transparent base material and has a plurality of openings, and a colored portion which is arranged in the opening.

(A) Transparent Substrate The transparent substrate in the present invention is a member that supports a light-shielding portion and a colored portion described later.

Here, unless otherwise specified, the term “transparent” means a degree of transparency that does not hinder the visual recognition from the operation surface of the operator of the display device using the substrate for a display device of the present invention. Say. Therefore, "transparent" includes colorless and transparent, and colored and transparent to the extent that visibility is not hindered, and is not defined by strict transmittance, and the transparency of the transparent material may be changed depending on the application of the substrate for a display device of the present invention. The degree can be determined.

The thickness of the transparent base material in the present invention is not particularly limited as long as it is a thickness that can support each member, and can be appropriately designed depending on the application of the base material for a display device of the present invention. The specific thickness of the transparent substrate can be the same as the thickness of the transparent substrate used for a general color filter, and thus the description thereof is omitted here.

The material of the transparent base material in the present invention is not particularly limited as long as it is a material used for general color filters, and for example, a non-flexible inorganic material such as quartz glass, Pyrex (registered trademark) glass, or synthetic quartz plate. Examples of the substrate include a flexible resin substrate such as a transparent resin film and an optical resin plate. Above all, an inorganic substrate is preferably used, and among the inorganic substrates, a glass substrate is preferably used. Furthermore, it is preferable to use a non-alkali type glass substrate among the glass substrates. This is because a non-alkali type glass substrate is excellent in dimensional stability and workability in high-temperature heat treatment, and since it does not contain an alkali component in the glass, it is suitable for, for example, a color filter used in a display device. ..

(B) Light-shielding portion The light-shielding portion in the present invention is a member arranged on a transparent substrate and having a plurality of openings.

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 with the first direction, and define the opening. Examples of the shape of the opening include a rectangular shape. Further, the width of the opening of the light shielding portion can be the same as the width of the opening of the light shielding portion of a general color filter, and therefore the description thereof is omitted here.

The line width of the light-shielding portion in the present invention can be appropriately selected according to the application of the display device base material of the present invention and is not particularly limited, but is preferably in the range of 1 μm to 30 μm, for example. Above all, it is preferably in the range of 1.5 μm to 28 μm, and particularly preferably in the range of 2 μm to 25 μm. If the line width of the light-shielding portion is smaller than the above range, the opening may not be sufficiently defined. Further, if the line width of the light shielding portion is larger than the above range, it may not be possible to obtain a high-definition color filter. When the line width of the light shielding portion is not constant, it is preferable that the line width of the light shielding portion is entirely within the above range.

The thickness of the light shielding portion in the present invention is not particularly limited as long as it has a thickness capable of exhibiting a desired light shielding property, and is appropriately adjusted according to the material used for the light shielding portion. The specific thickness of the light-shielding portion in the present invention may be, for example, 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 capable of exhibiting a desired light shielding property. Specifically, the light-shielding portion is usually a cured product containing a binder resin containing a black color material, but it 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. Further, the binder resin used for the light shielding portion is appropriately selected according to the method of forming the light shielding portion. When the light-shielding portion is formed by the photolithography method, examples of the binder resin include acrylate-based, methacrylate-based, polyvinyl cinnamate-based, or cyclized rubber-based photosensitive resins having a reactive vinyl group. .. When the light-shielding portion is formed by a printing method or an inkjet method, examples of the binder resin include polymethylmethacrylate resin, polyacrylate resin, polycarbonate resin, polyvinylalcohol resin, polyvinylpyrrolidone resin, hydroxyethylcellulose resin, carboxymethylcellulose 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 the black color material used for the light-shielding portion, for example, a material similar to that of a general light-shielding portion can be used, and either a pigment or a dye can be used. Specific examples include carbon black and titanium black.

As the colored material other than the black color material used for the light-shielding portion, any material that can form the light-shielding portion having a desired light-shielding property may be used, and examples thereof include red, green, blue, yellow, orange, and purple. The colored materials of each color are listed. Further, both a pigment and a dye can be used as the colored color material. The colored materials may be used alone or in combination of two or more. Further, as the colored color material, one colored color material may be used, or two or more colored color materials may be mixed and used. The colored material can be the same as the colored material used in a general color filter, and thus the description thereof is omitted here.

The content of the black color material contained in the light shielding part is not particularly limited as long as it can form the light shielding part having a desired light shielding property, but for example, the black color material is contained in the light shielding part. It is preferably the main component of the coloring material. Specifically, the content of the black colorant 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 to be in the range of 5% by mass to 15% by mass.
Further, the content of the colored color material other than the black color material contained in the light-shielding portion is preferably in the range of 1% by mass to 8% by mass, and particularly in the range of 1% by mass to 6% by mass. It is preferably within the range, and particularly preferably within the range of 1% by mass to 4% by mass.

The light-shielding portion in the present invention may contain other materials, if necessary, in addition to the constituent materials described above. Examples of other materials include photopolymerization initiators, sensitizers, coatability improvers, crosslinking agents, polymerization inhibitors, plasticizers, flame retardants and the like.

(C) Coloring part The coloring part in the present invention is a member arranged in the opening of the above-mentioned light shielding part.

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 the range of 1 μm to 5 μm, for example.

In the present invention, for example, there are 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, It is also possible to use five colors such as green, blue, yellow, and cyan.

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

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

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

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

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

(A) Transparent Substrate The transparent substrate in the present invention is a member that supports a sensor electrode described later.
The transparent base material in the present invention can be the same as the content described in the above-mentioned section "(1) Color filter (a) Transparent base material", and therefore the description thereof is omitted here.

(B) Sensor Electrode The sensor electrode in the present invention is a member used for detecting the position of the touch panel.

The sensor electrode in the present invention may be a transparent conductive layer having transparency, or may be a mesh-shaped mesh electrode formed of fine wires. In the present invention, when the sensor electrode is a mesh-shaped mesh electrode made of fine wires, it is possible to make the sensor electrode apparently transparent even if the material used for the sensor electrode is an opaque metal material.

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 application of the substrate for a display device obtained by the present invention, and similar to general sensor electrodes. 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 may be appropriately adjusted according to the application of the substrate for a display device obtained by the present invention. Since it can be made the same as a general sensor electrode, the description thereof is omitted here.

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

(C) Insulating Layer The insulating layer in the present invention is a member that can be used when insulating the above-mentioned sensor electrode.

The insulating layer in the present invention is usually arranged so as to cover the sensor electrode. The thickness of the insulating layer is
The thickness is preferably such that the sensor electrode can be insulated to 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. Specific examples include insulating resin materials such as polyimide resin, acrylic resin, cardo resin, epoxy resin, and melamine resin, and inorganic materials such as glass. The constituent materials used for the insulating layer may be used alone or in combination of two or more kinds. The layer structure of the insulating layer may be a single layer or a multilayer including two or more layers.

(3) Decorative member The decorative member in the present invention has a transparent base material and a decorative portion arranged on the transparent base material.

The decorative portion used for the decorative member in the present invention is a member exhibiting a predetermined color. Therefore, the decorative member in the present invention, in the display device using the substrate for a display device of the present invention, by arranging the decorative portion so as to overlap in a non-pixel region such as a frame portion in plan view, It is possible to improve the appearance of the device.

(A) Transparent Substrate The transparent substrate in the present invention is a member that supports the decorative portion described below.
The transparent base material in the present invention can be the same as the content described in the above-mentioned section "(1) Color filter (a) Transparent base material", and therefore the description thereof is omitted here.

(B) Decorative part The decorative part in the present invention can improve the appearance of a display device using the substrate for a display device of the present invention by exhibiting a predetermined color.

The thickness of the decorative part in the present invention can be appropriately adjusted according to the application of the display device using the substrate for a display device of the present invention and can be the same as a general decorative part. The description here is omitted.

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

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

The ultraviolet-curable adhesive layer in the present invention refers to a member that is cured by irradiation with ultraviolet rays to exhibit adhesiveness. Further, the ultraviolet curable adhesive layer usually has a predetermined tackiness before being irradiated with ultraviolet rays. Here, the predetermined adhesiveness means that, for example, the peel strength of the ultraviolet-curable adhesive layer to the glass plate by the 180-degree peel test defined in JIS K6854-2 is preferably 10 N/25 mm width or more, among them, The width is preferably 15 N/25 mm or more, and more preferably 20 N/25 mm or more. Further, in the present invention, the peel strength of the UV-curable adhesive layer is, for example, preferably 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. Is preferred.

In the present invention, by using the ultraviolet-curable adhesive layer, it is possible to reduce the thickness as compared with the conventionally used adhesive layer made of a pressure sensitive adhesive. The thickness of the ultraviolet-curable adhesive layer in the present invention is, for example, preferably 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 color filter substrate with an optical functional layer of the present invention is used in a display device, the optical path of light emitted from the backlight part is shortened. Then, it becomes possible to suppress the spread of light. Further, the thickness of the ultraviolet curable adhesive layer in the present invention is preferably, for example, 0.5 μm or more. When the thickness of the ultraviolet curable adhesive layer in the present invention is the above lower limit, it becomes possible to sufficiently adhere the color filter substrate and the optical functional layer, which are laminated via the ultraviolet curable adhesive layer.
The thickness of the ultraviolet curable adhesive layer in the present invention can be measured by observing a cross section using a scanning electron microscope (SEM), for example.

The ultraviolet-curable adhesive layer in the present invention is a member that transmits light emitted from the backlight unit when the color filter substrate with an optical functional layer 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 being transparent to the extent that the light emitted from the backlight unit 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 material and cured by irradiation with ultraviolet rays. The ultraviolet curable resin material used for the ultraviolet curable adhesive layer is not particularly limited as long as it is a material that can be cured by irradiation with ultraviolet rays having a wavelength 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 the like, 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, bisphenol fluorene derivative, bisphenoxyethanol full orange (meth)acrylate, bisphenol full orange epoxy (meth)acrylate and the like can be mentioned. .. In addition, (meth)acrylate is a notation which means an acrylate or a methacrylate here.
In the present invention, these ultraviolet curable resins may be used alone or in combination of two or more.

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 crystalline compound is oriented in one direction. Further, the optical functional member may have an alignment layer in addition to the optical functional layer.

The optical functional member in the present invention is a member arranged in the outermost layer of the substrate for a display device of the present invention. Since the optical functional member is disposed in the outermost layer, the optical functional member can be provided by the transfer method after forming the other member that constitutes the display device base material, and thus the other member is formed. It is possible to suppress problems such as deterioration of the optical functional member due to heat treatment or the like at that time.

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 an alignment layer 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 that form 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 alignment states of the liquid crystal compound include, for example, a state in which the liquid crystal compound is aligned in the length direction of the optical functional layer and a state in which the liquid crystal compound is aligned in the thickness direction of the optical functional layer. The former liquid crystal structure is called a homogeneous structure (parallel alignment structure), and by having such a structure, it is possible to optically impart the property as an A plate to the optical functional layer. The latter liquid crystal structure is referred to as a homeotropic structure (vertical alignment structure). By having such a structure, it is possible to give the optically functional layer a property as an optically positive C plate. Further, the alignment state of the liquid crystal compound may be a cholesteric alignment state in which the liquid crystal compound exhibits a regular spiral structure. By having such an alignment state, it is possible to impart an optically negative C-plate property to the optical function layer.

The thickness of the optical functional layer can be appropriately adjusted according to the type of liquid crystal 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 further preferably in the range of 120 nm to 140 nm. .. When the thickness of the optical functional layer is set within a range such that 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. The thickness of the optical functional layer can be appropriately determined depending on the type of the liquid crystal compound contained, 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 serves as 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 being transparent to the extent that the light emitted from the backlight unit is transmitted, unless otherwise specified. The specific transmittance of the optical functional layer can be the same as that of a general optical functional layer, and thus the description thereof is omitted here.

The liquid crystal compound contained in the optical functional layer is not particularly limited as long as it is a material capable of imparting desired optical functionality to the optical functional layer. Among them, a liquid crystal compound exhibiting photosensitivity is preferable, and a liquid crystal compound exhibiting a nematic phase is particularly preferably used. This is because the nematic liquid crystal can be regularly arranged more easily than other liquid crystal compounds exhibiting a liquid crystal phase.

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

Examples of such a polymerizable functional group include various polymerizable functional groups that are polymerized by the action of ionizing radiation such as ultraviolet rays and electron beams, or heat. As a typical example of the polymerizable functional group, a radical polymerizable functional group, a cation polymerizable functional group or the like can be mentioned. Furthermore, as a representative example of a radically polymerizable functional group, a functional group having at least one addition-polymerizable ethylenically unsaturated double bond can be mentioned, and as a specific example, a vinyl group having or not having a substituent, An acrylate group (general term including an acryloyl group, a methacryloyl group, an acryloyloxy group, a methacryloyloxy group) and the like can be mentioned. 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, a functional group having an ethylenically unsaturated double bond is preferably used from the viewpoint of the process.

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 two or more polymeric functional groups, and what has only one.
In addition, 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.

The above-mentioned liquid crystalline compounds may be used alone or in combination of two or more. When two or more kinds of liquid crystal materials are mixed and used in the present invention, a polymerizable liquid crystal material and a liquid crystal material having no polymerizable functional group may be mixed and used.

(2) Alignment Layer In the present invention, the optical functional member may have an alignment layer. The alignment layer is a member containing a photo-alignment material.

Here, the "photo-alignment material" contained in the alignment layer refers to a material capable of exhibiting the alignment regulating force by the photo-alignment method. Further, the “photo-alignment method” is a method in which the alignment layer is exposed to light having an arbitrary polarization state (polarized light) to develop the alignment regulating force (anisotropic) of the alignment layer. Therefore, the photo-alignment material in the present invention can be said to be a material capable of exhibiting the alignment regulating force by irradiating polarized light. Further, the "alignment regulating force" means an interaction for aligning the liquid crystal compounds contained in the above-mentioned optical functional layer.

The thickness of the alignment layer in the invention can be adjusted according to the constituent material. The thickness of the alignment layer in the 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 preferably 0.03 μm to 0 μm. It is preferably within the range of 0.05 μm. When the thickness of the alignment layer in the invention is within the above range, a desired alignment control force can be exerted on the liquid crystal compound contained in the above-mentioned optical functional layer.
The thickness of the alignment layer in the invention can be measured, for example, by observing the cross section 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 base material of the present invention is used in a display device. Therefore, the alignment layer in the invention preferably has a predetermined transparency. Here, “transparent” means being transparent to the extent that the light emitted from the backlight unit is transmitted, unless otherwise specified. The specific transmittance of the alignment layer can be the same as that of a general alignment layer, and thus the description thereof is omitted here.

The alignment material contained in the alignment layer is not particularly limited as long as it is a material capable of expressing the alignment regulating force by irradiation with polarized light. Such photo-alignment materials include photo-isomerization materials that change only the molecular shape by cis-trans change to reversibly change the alignment control force, and photo-reactive materials that change the molecules themselves by irradiating polarized light. Can be roughly divided into In the present invention, either a photo-isomerization material or a photo-reactive material can be preferably used, but a photo-reactive material is more preferably used.
Since the photoreactive material expresses the alignment regulating force by reacting molecules when irradiated with polarized light, it becomes possible to irreversibly develop the alignment regulating force. Therefore, the photo-reactive material is superior in alignment regulating force and stability over time.

Photoreactive materials can be further sorted by the type of reaction that occurs with polarized irradiation. Specifically, a photodimerization-type material that develops an alignment control force by causing a photodimerization reaction, a photobonding-type material that develops an alignment control force by generating a photolysis reaction, and a photolysis reaction and a photobonding reaction Can be divided into photo-decomposition-bonding materials and the like that exhibit orientation regulating force. In the present invention, any of the above-mentioned photoreactive materials can be preferably used, but among them, the photodimerization type material is preferably used from the viewpoint of stability and reactivity (sensitivity).

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

Examples of such a photodimerizable material include cinnamate, coumarin, benzylidenephthalimidine, benzylideneacetophenone, diphenylacetylene, stilbazole, uracil, quinolinone, maleinimide, and polymers having a cinnamylidene acetic 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 photodimerizable material include the compounds described in 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 kind or two or more kinds.

4. Substrate The substrate in the present invention is a member that supports the above-mentioned members. In addition, the base material in the present invention can be a common member with the transparent base material, for example, when the functional layer has a transparent base material. That is, when the functional layer in the present invention is, for example, a color filter, a touch panel, or a decorative member, the transparent base materials 21, 31, 41 and the base material 1 are different from each other as shown in FIGS. It can be a common member.
The base material in the present invention can be the same as the content described in the above section “1. Functional layer (1) Color filter (a) Transparent base material”, and thus the description thereof is omitted here. To do.

5. Other Members The display device base material according to the present invention may have other members, if necessary, in addition to the functional layer, the ultraviolet-curable adhesive layer, the optical functional member and the base material described above. Examples of the other member include a refractive index adjusting layer that is arranged at a position closer to the base material than the ultraviolet curable adhesive layer in the display device base material and capable of adjusting the refractive index. Note that the refractive index adjusting layer can be the same as that used in a general display device, and therefore description thereof is omitted here.

6. Method for Manufacturing Base Material for Display Device The method for manufacturing a base material for a display device of the present invention is not particularly limited as long as it is a method capable of obtaining a base material for a display device in which the above-mentioned members are laminated.

For example, as shown in FIG. 6A, a functional layer forming step of forming the functional layer 5 on the base material 1, and as shown in FIG. 6B, the alignment layer 4 is formed on the transfer base material 6. And an optical functional member forming step of forming an optical functional member 11 having the optical functional layer 3, and as shown in FIG. 6C, the functional layer 5 and the optical functional member 11 are attached via an ultraviolet curable adhesive layer. A method for producing a substrate for a display device includes a laminating step for joining and a peeling step for peeling the transfer substrate 6 as shown in FIG. 6D.

In the laminating step in the present invention, an ultraviolet curable adhesive layer may be arranged on the optical functional member, or an ultraviolet curable adhesive layer may be arranged on the functional layer. In the laminating step in the present invention, after the optical functional member of the transfer functional layer and the functional layer formed on the substrate are laminated via the ultraviolet curable adhesive layer, ultraviolet ray is irradiated to cure the ultraviolet ray. It is preferably a step of curing the mold adhesive layer. By irradiating ultraviolet rays in the laminating step to cure the ultraviolet curable adhesive layer, it becomes easy to selectively peel only the transfer base material in the subsequent peeling step.

In the manufacturing method described above, the method of forming each member constituting the display device base material is the same as the method of forming a functional layer such as a general color filter, a touch panel, and a decorative member and the method of forming an optical functional member. Therefore, the description here is omitted. For example, the methods described in JP-A-2015-31863 and JP-A-2012-108563 can be mentioned.

7. Display Device As a display device using the base material for a display device of the present invention, for example, a base material, a functional layer disposed on one surface side of the base material, and the base material of the functional layer are opposite to each other. An ultraviolet-curable adhesive layer disposed on the side surface, and an optical functional member disposed on the functional layer via the ultraviolet-curable adhesive layer and having an optical functional layer in which a liquid crystalline compound is oriented in one direction. A liquid crystal layer disposed on a surface of the optical functional member opposite to the ultraviolet-curable adhesive layer, and a thin film transistor substrate disposed on a surface of the liquid crystal layer opposite to the functional layer. A display device characterized by

FIG. 7 is a schematic cross-sectional view showing an example of a display device using the display device base material of the present invention. As shown in FIG. 7, the display device 100 according to the present invention includes a substrate 1, a functional layer 5 disposed on the substrate 1, and an ultraviolet-curable adhesive layer 2 disposed on the functional layer 5. The optical functional layer 3, the alignment layer 4 disposed on the optical functional layer 3, and the thin film transistor base material 8 disposed on the alignment layer 4 with the liquid crystal layer 7 interposed therebetween.

The display device base material used in the display device of the present invention has the same contents as those described in the above-mentioned sections "1. functional layer" to "6. display device base material manufacturing method". Therefore, the description here is omitted. Further, the liquid crystal layer and the thin film transistor base material used for the display device base material in the present invention can be the same as those used for a general display device, and therefore description thereof is omitted here.

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

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

A liquid crystal display device having the display device base material of the present invention was manufactured as follows.

[Example]
(Preparation of curable resin composition)
Charge 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) into a polymerization tank. After stirring and dissolving, 7,2 parts by weight of 2,2′-azobis(2-methylbutyronitrile) was added and uniformly dissolved. Then, the mixture was stirred at 85° C. for 2 hours under a nitrogen stream, and further reacted at 100° C. for 1 hour. To the obtained solution, 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, and the mixture was stirred at 100° C. for 5 hours to prepare a copolymer resin solution ( Solid content 50%) was obtained.

Next, the following materials were stirred and mixed at room temperature to prepare 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 (SR399 of Sartomer Co.) 4 parts by weight of orthocresol novolac type epoxy resin (Epicoat 180S70 of Yuka Shell Epoxy Co., Ltd.) -Methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one
4 parts by weight/diethylene glycol dimethyl ether 52 parts by weight

[Formation of 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 liquid.

<Composition of black pigment dispersion>
-Black pigment 23 parts by weight-Polymer dispersion material (Big Chemie Japan KK Disperbyk111) 2 parts by weight-Solvent (diethylene glycol dimethyl ether) 75 parts by weight

Next, the following components were sufficiently mixed to obtain a light-shielding composition.
<Composition of composition for light-shielding portion>
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 above composition for a light-shielding part was applied on a glass substrate (AN material, Asahi Glass Co., Ltd.) having a thickness of 0.7 mm by 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 (a stripe pattern in which RGB is repeated at a pitch of 75 μm) with an ultra-high pressure mercury lamp, and then developed with a 0.05 wt% potassium hydroxide aqueous solution, and then the substrate is placed in an atmosphere of 230° C. A heat treatment was performed by leaving it for 30 minutes to form a light-shielding portion having a plurality of openings.

(Formation of colored part)
A red curable resin composition having the following composition was applied by a spin coating method (coating thickness: 2.0 μm) on a glass substrate having a light-shielding portion formed as described above, and then dried in an oven at 70° C. for 3 minutes. did. Then, a photomask is arranged at a distance of 100 μm from the coating film of the red curable resin composition, and an ultraviolet ray is applied only to a region corresponding to the formation region of the colored portion using a 2.0 kW ultra-high pressure mercury lamp by a proximity liner. Irradiated for 10 seconds. Then, it was immersed in a 0.05 wt% aqueous solution of potassium hydroxide (liquid temperature: 23° C.) for 1 minute for alkali development to remove only the uncured portion of the coating film of the red curable resin composition. After that, the substrate was left in an atmosphere of 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, a green curable resin composition having the following composition was used to form a green relief pattern (green colored portion) in the opening of the light shielding portion by the same process as the formation of the red relief pattern.
Further, a blue curable resin composition having the following composition was used to form a blue relief pattern (blue colored portion) in the opening of the light-shielding portion by the same process as the formation of the red relief pattern.

(Formation of protective part)
After that, the curable resin composition described above as a protective portion was applied to the surface on which the colored portion and the light-shielding portion were formed 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 ultraviolet rays were irradiated for 10 seconds only on the spacer formation region using a 2.0 kW ultra-high pressure mercury lamp with a proximity liner. Next, it was immersed in a 0.05 wt% aqueous solution of potassium hydroxide (liquid temperature: 23° C.) for 1 minute for alkali development to remove only the uncured portion of the coating film of the curable resin composition. After that, the substrate was left in an atmosphere of 230° C. for 30 minutes for heat treatment to form a protective portion.
In this way, a color filter was obtained.

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

<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, acetic acid-3-methoxybutyl 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, 3-methoxybutyl acetate 67 parts by weight

[Formation of optical functional member for transfer]
A photo-alignment film composition containing a photo-alignment material having a polyvinyl cinnamate (PVCi) group on the transfer substrate so that the film thickness after curing is about 1.5 μm (PGME is used as a solvent) Was applied by the die coating method.
Then, it was dried for 2 minutes in a dryer adjusted to 90° C., the solvent was evaporated, and the composition was thermally cured to form a photo-alignment film (alignment layer).
Then, a liquid crystal composition containing a liquid crystal compound exhibiting a photopolymerizable nematic phase and a photopolymerization initiator (solid content: 30%, MIBK is used as a solvent) was applied by a die coating method and dried to a thickness of 1 μm. A liquid crystal layer was formed to obtain a transfer film having an optical functional layer.
After that, an ultraviolet-curable adhesive layer having a thickness of 3 μm was formed on the surface of the obtained optical function member for transfer which was on the optical function layer side.

[Laminating process, peeling process]
The colored portion side of the obtained color filter and the ultraviolet curable adhesive layer formed on the transfer optical function member were bonded together so that air could not enter. After that, ultraviolet rays were irradiated from the surface on the optical function member side to cure the ultraviolet ray curable adhesive layer.
Then, the transfer substrate was peeled off.

In this way, the display device base material of the present invention was obtained.

[Production of liquid crystal display device]
An alignment layer was formed on the surface of the optical functional member of the display device substrate obtained as described above. Next, a thin film transistor was formed on the glass substrate, and the required amount of IPS liquid crystal was dropped. Then, while sandwiching the liquid crystal, the thin film transistor and the surface of the substrate for a display device on the alignment layer side are overlapped with each other and exposed to each other at an irradiation dose of 400 mJ/cm ² to be bonded to form a cell assembly, The backlight unit was installed. Finally, a pattern retarder was separately formed on the base material, and the pattern retarder was attached to the surface opposite to the backlight part to manufacture a liquid crystal display device.

[Comparative example]
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 15 μm was formed on the optical functional layer side surface of the transfer optical functional member. ..

[Evaluation]
In the liquid crystal display device manufactured in Comparative Example, the pressure-sensitive adhesive exhibits fluidity due to heating when forming the alignment layer, and the pressure-sensitive adhesive causes a defect that the pressure-sensitive adhesive permeates the adjacent optical functional layer, A defect has occurred. On the other hand, the UV-curable resin that constitutes the UV-curable adhesive layer of the example does not show fluidity due to heating when the liquid crystal display device is manufactured because the resin is cured by irradiation with UV light. A display device of good quality could be manufactured.

DESCRIPTION OF SYMBOLS 1... Substrate 2... UV curable adhesive layer 3... Optical functional layer 4... Alignment layer 5... Functional layer 10... Display device substrate 20... Color filter 30... Touch panel 40... Decorative member

Claims (4)

Base material,
A functional layer arranged on one surface side of the substrate,
An ultraviolet curable adhesive layer arranged on the surface of the functional layer opposite to the base material,
An optical functional member having an optical functional layer disposed on the functional layer via the ultraviolet-curable adhesive layer and having a liquid crystalline compound oriented in one direction,
The thickness of the ultraviolet curable adhesive layer is 10 μm or less,
A display characterized in that the adhesive used for the UV-curable adhesive layer has a peel strength of 10 N/25 mm or more with respect to a glass plate by a 180-degree peel test specified in JIS K6854-2 before being irradiated with ultraviolet rays. Substrate for equipment. The functional layer is a transparent substrate, a light-shielding portion having a plurality of openings arranged on the transparent substrate, and a color filter having a colored portion arranged in the opening,
The display device base material according to claim 1, wherein a surface of the color filter on the colored portion side is disposed so as to face the optical functional member. The functional layer is a transparent substrate, a touch panel having a sensor electrode arranged on the transparent substrate,
The display device base material according to claim 1, wherein a surface of the touch panel on the sensor electrode side is arranged so as to face the optical functional member. The functional layer is a transparent substrate, a decorative member having a decorative portion arranged on the transparent substrate,
The display device base material according to claim 1, wherein a surface of the decoration member on the decoration portion side is arranged so as to face the optical function member.