JP2019219447A - Color filter substrate, liquid crystal display, and laminate - Google Patents

Abstract

To provide a color filter substrate that can improve display visibility in a bright environment of a liquid crystal display having a touch panel, a liquid crystal display using the same, and a laminate used for a liquid crystal display.SOLUTION: A color filter substrate 10 comprises: two optical functional members 11A, 1B; a support member 2 arranged between the two optical functional members; and a color filter member 3 arranged between the two optical functional members. The optical functional members have phase difference layers containing a liquid crystal material. The color filter substrate further has a touch panel member 4 having sensor electrode layers arranged in a pattern shape, and the touch panel member is arranged between the two optical functional members.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a color filter substrate, a liquid crystal display device, and a laminate.

In recent years, with the development of personal computers, particularly portable personal computers, demand for liquid crystal display devices has been increasing. In addition, recently, the penetration rate of liquid crystal televisions for home use has been increasing, and smartphones and tablet terminals have also become widespread. Therefore, the market for liquid crystal display devices has been expanding.
In addition, a touch panel is widely used as an input unit used in combination with a liquid crystal display device.

  Recently, with the spread of smartphones and the like, liquid crystal display devices have been frequently used not only indoors but also outdoors. However, in a liquid crystal display device, display visibility in a bright environment tends to decrease due to reflection of external light inside the device. In addition, since the touch panel has a sensor electrode layer including a material having a relatively high reflectance such as a transparent conductive material and a metal material, the touch panel easily reflects external light, and when combined with a liquid crystal display device, the display visibility is high. Tends to decrease.

  As a technique for suppressing external light reflection of a liquid crystal display device, for example, in Patent Document 1, in a liquid crystal display provided with a protective plate on the front surface of the liquid crystal display element, the liquid crystal display element includes a first glass plate, A light control device having an opening formed on the inner rear surface of the first glass plate, a second glass plate having a polarizer fixed to at least the outer surface, and the inside of the first glass plate and the second glass plate. A liquid crystal sealed between the liquid crystal and the inside of the glass plate, and a quarter of which the optical principal axis is inserted between the liquid crystal and the light control element and whose optical principal axis is inclined by approximately 45 ° with respect to the optical principal axis of the polarizer. A wavelength plate, and wherein the protective plate is fixed to the polarizer and the back surface side of the polarizer, and the optical principal axis thereof is inclined by approximately 45 ° with respect to the optical principal axis of the polarizer. A liquid crystal display configured with a four-wave plate is disclosed.

  Patent Literatures 2 and 3 disclose, as a technique for suppressing external light reflection from a touch panel, a touch panel externally attached to a liquid crystal display, which includes a first quarter-wave plate and a spacer in order from the liquid crystal display side. There is disclosed a touch panel having at least a two-layered transparent conductive film, a second quarter-wave plate, and a polarizing plate opposed to each other and having a circularly polarized antireflection filter. Patent Documents 2 and 3 aim to suppress reflection at the interface between the lowermost surface of the touch panel and the air layer when an air layer is provided between the touch panel and the liquid crystal display. Further, Patent Documents 4 and 5 disclose a technique in which a circularly polarizing plate and a λ / 4 plate are disposed on both surfaces of a touch panel in order to reduce the reflection of the touch panel.

  Patent Documents 6 to 9 disclose a liquid crystal display device having a touch panel, in which a liquid crystal cell and a touch panel are sandwiched between two circularly polarizing plates.

JP-A-3-156420 Patent No. 3313337 JP 2012-214056 A JP 2007-25800A International Publication No. 2011/105221 JP 2004-45887 A JP 2004-291500 A Japanese Patent No. 6048984 JP 2017-54140 A

In recent years, for example, a touch panel having a sensor electrode layer arranged in a pattern, such as a capacitance type, has been widely used. When the touch panel is combined with a display device, the visibility of the sensor electrode layer from the display surface side may cause a reduction in display visibility. In particular, when the touch panel is combined with a liquid crystal display device, the display visibility may be significantly reduced due to the influence of the sensor electrode layer and the reflection of external light inside the liquid crystal display device.
The present disclosure is an invention made in view of the above circumstances, and a color filter substrate capable of improving display visibility in a bright environment of a liquid crystal display device having a touch panel, a liquid crystal display device using the same, and A main object is to provide a laminate used for a liquid crystal display device.

  In order to achieve the above object, the present disclosure provides two optical function members, a support member disposed between the two optical function members, and a color filter member disposed between the two optical function members. The optical function member is a color filter substrate having a retardation layer containing a liquid crystal material, further comprising a touch panel member having a sensor electrode layer arranged in a pattern, the touch panel member, A color filter substrate provided between the two optical function members is provided.

  According to the present disclosure, by providing a color filter member and a touch panel member between two optical function members, when a liquid crystal display device having a touch panel is used, display visibility in a bright environment is improved. A color filter substrate capable of being used.

  In the above disclosure, it is preferable that the retardation layers of the two optical function members have the same wavelength dispersion and the same heat change characteristic of retardation value. This is because a color filter substrate capable of suppressing a decrease in contrast in a liquid crystal display device can be provided.

  In the above disclosure, it is preferable that the retardation layers of the two optical function members have the same liquid crystal material. Since the wavelength dispersion of the retardation layer and the uniformity of the change characteristics of the retardation value due to heat of the two optical function members can be increased, the optical compensation state of the two optical function members can be improved. Because.

  In the above disclosure, both of the two optical functional members are a laminate of the support member, the fixing layer and the retardation layer directly disposed on the color filter member or the touch panel member, and the fixing layer is It is preferably an alignment layer or an adhesive layer. This is because the optical axes, thicknesses, and the like of the retardation layers of the two optical function members can be matched with high accuracy, and the optical compensation state of the two optical function members can be improved.

  In the above disclosure, it is preferable that the touch panel member is a capacitance type touch panel member. Since the touch panel member of the capacitance type has a tendency that the bone appearance of the sensor electrode layer tends to occur, by applying to the color filter substrate of the present disclosure, it is possible to exert a high effect of suppressing the bone appearance of the sensor electrode layer. Because it can be.

  The present disclosure provides a liquid crystal display device including at least a liquid crystal panel including the above-described color filter substrate, a counter substrate, and a liquid crystal layer disposed between the color filter substrate and the counter substrate.

  According to the present disclosure, a liquid crystal display device having good display visibility in a bright environment can be provided by including the above-described color filter substrate.

  The present disclosure is a laminate used in the above-described liquid crystal display device, the laminate including the support member, the color filter member, and the touch panel member having the sensor electrode layer arranged in a pattern, A laminate comprising: the above-mentioned optical function member disposed on one surface side of the laminate member.

  According to the present disclosure, by having the above-described laminated structure, with respect to the laminated member, on the surface opposite to the surface on which the optical functional member is disposed, by disposing another optical functional member, The liquid crystal display device can be obtained.

  The color filter substrate according to the present disclosure has an effect that the display visibility of a liquid crystal display device having a touch panel in a bright environment can be improved.

1 is a schematic cross-sectional view illustrating an example of a color filter substrate according to the present disclosure. FIG. 3 is an explanatory diagram illustrating an optical compensation state of the optical function member according to the present disclosure. 1 is a schematic cross-sectional view illustrating an example of a liquid crystal display device according to the present disclosure. FIG. 4 is an explanatory diagram illustrating behavior of light source light and external light in the liquid crystal display device of the present disclosure. FIG. 7 is a schematic cross-sectional view illustrating another example of the color filter substrate of the present disclosure. FIG. 4 is an explanatory diagram illustrating an alignment state of a liquid crystal material of a retardation layer. FIG. 4 is an explanatory diagram illustrating an alignment state of a liquid crystal material of a retardation layer. FIG. 4 is an explanatory diagram illustrating wavelength dispersion of a retardation layer. FIG. 4 is a process diagram illustrating an example of a method for forming a retardation layer according to the present disclosure. FIG. 4 is a process diagram illustrating an example of a method for manufacturing a color filter substrate according to the present disclosure. 6 is a graph illustrating an example of a method for determining a condition of an annealing process. FIG. 1 is a schematic cross-sectional view illustrating an example of a laminate of the present disclosure.

  Hereinafter, embodiments of the present disclosure will be described with reference to the drawings and the like. However, the present disclosure can be implemented in many different aspects and should not be construed as being limited to the description of the embodiments illustrated below. Also, in order to make the description clearer, the width, thickness, shape, and the like of each part may be schematically illustrated as compared with the actual form, but this is merely an example, and the interpretation of the present disclosure is limited. Not something. In the specification and the drawings, components similar to those described in regard to a drawing thereinabove are marked with like reference numerals, and a detailed description is omitted as appropriate.

  The present disclosure relates to a technique relating to a color filter substrate, a liquid crystal display device, and a laminate used for a liquid crystal display device.

As described above, for example, in a bright environment such as outdoors, it is required to make the display of the liquid crystal display device easier to see. One of the reasons why display visibility is low in a bright environment is that reflected light of external light inside the liquid crystal panel is observed by an observer.
In addition, as described above, the touch panel having the sensor electrode layers arranged in a pattern has a case where when the sensor panel is combined with the display device, the display visibility is reduced due to the sensor electrode layer being viewed from the display surface side. There is. As an example, there is a case where a so-called bone appearance of the sensor electrode layer occurs in which the external shape of the sensor electrode layer in a plan view is observed from the display surface side. Bone appearance of the sensor electrode layer tends to occur particularly when a transparent conductive layer is used as the sensor electrode layer. As another example, there is a case where reflected light of external light on the sensor electrode layer is observed by an observer. In this case, the portion where the sensor electrode layer is disposed and the vicinity thereof may be observed while being reflected in white. External light reflection by the sensor electrode layer tends to occur particularly when a mesh electrode is used as the sensor electrode layer.

The touch panel having the sensor electrode layers arranged in a pattern as described above, particularly when combined with a liquid crystal display device, significantly reduces display visibility due to the influence of the sensor electrode layer and reflection of external light inside the liquid crystal display device. In some cases.
In order to solve this problem, the inventors of the present disclosure have conducted intensive studies and found that, by arranging the touch panel member between two optical function members, it is possible to suppress the bone appearance of the sensor electrode layer. did. Furthermore, the inventors of the present disclosure dispose a member having a difference in reflection characteristics between two optical function members so that reflected light can be observed without being affected by a difference in reflection characteristics in each member. It has been found that it is possible to suppress that.

  From the above, the inventors of the present disclosure have proposed a color filter substrate capable of improving the display visibility of a liquid crystal display device having a touch panel in a bright environment, a liquid crystal display device using the same, and a laminate used in the same. I completed my body. Hereinafter, the details will be described.

A. Color filter substrate The color filter substrate of the present disclosure includes two optical function members, a support member disposed between the two optical function members, and a color filter member disposed between the two optical function members. The optical function member is a color filter substrate having a retardation layer containing a liquid crystal material, further comprising a touch panel member having a sensor electrode layer arranged in a pattern, the touch panel member, the It has a structure arranged between two optical function members.

  The color filter substrate according to the present disclosure will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view illustrating an example of the color filter substrate of the present disclosure. The color filter substrate 10 shown in FIG. 1 includes two optical function members 1 (1 A and 1 B), a support member 2 disposed between the two optical function members 1, and between the two optical function members 1. The optical function member 1 has a retardation layer 11. Further, the color filter substrate 10 further includes a touch panel member 4 having a sensor electrode layer 41 arranged in a pattern, and has a structure in which the touch panel member 4 is disposed between the two optical function members 1. FIG. 1 shows an example in which the respective members of the color filter substrate 10 are stacked in the order of the optical function member 1A, the color filter member 3, the support member 2, the touch panel member 4, and the optical function member 1B.

In the present disclosure, as shown in FIG. 1, both the two optical function members 1A and 1B are provided with the alignment layers 12 (12A and 12B) and the alignment layer directly disposed on the color filter member 3 or the touch panel member 4. It may be a laminate with the retardation layer 11 (11A and 11B). Further, the optical function member 1 may have a protective layer 13 (13A and 13B) on a surface opposite to the alignment layer 12 side with respect to the retardation layer 11.
As shown in FIG. 1, the color filter member 3 usually has at least a plurality of colored layers 32 arranged on one surface of the support member 2. FIG. 1 shows an example in which a plurality of colored layers 32 include a red colored layer 32R, a green colored layer 32G, and a blue colored layer 32B. Further, the color filter member 3 may have the light shielding layer 31 in a region overlapping the boundary region of the colored layer 32 in a plan view. The protective layer 33 may be disposed on the surface of the color filter member 3 opposite to the support member 2 with respect to the coloring layer 32.
The color filter substrate 10 of the present disclosure is generally arranged such that, when a liquid crystal display device is used, the surface on which the color filter member 3 is arranged with respect to the support member 2 faces the liquid crystal layer. That is, when the color filter substrate 10 is a liquid crystal display device, the optical function member 1A is disposed so as to face the liquid crystal layer, and the optical function member 1B is disposed outside the liquid crystal display device.

  Next, the arrangement of the two optical function members will be described with reference to the drawings. 2A to 2C are explanatory diagrams illustrating the arrangement of two optical function members according to the present disclosure. In the present disclosure, as shown in FIG. 2A, the two optical function members 1A and 1B are arranged so as to have an optical compensation state that cancels out (cancels) the phase difference between the retardation layers. You. Here, a case where the two optical function members 1A and 1B function as a λ / 4 member will be described. The two optical function members 1A and 1B are arranged such that the optical axes x1 and x2 of the retardation layers are orthogonal.

The optical compensation state will be described with reference to FIG. 2A by using a specific example in which linearly polarized light L _{line (0)} is incident on one of the two optical function members 1A and 1B from one of the optical function members 1A. . First, when the linearly polarized light L _{line (0)} is incident on the optical function member 1A, a phase difference of −λ / 4 occurs in the vibration direction of the linearly polarized light L _{line (0)} in the optical axis direction of the optical function member 1A. As a result, the linearly polarized light _{L line (0)} is converted into circularly polarized light _{L c.} Then circularly polarized light L _c, by entering the optical functional member 1B, the vibration direction, the phase difference in the optical axis direction of the optical functional member 1B is 1-? / 4 occurs. As a result, the circularly polarized light _Lc is converted again into the linearly polarized light _{Lline (0)} having the polarization direction _{Dline (0)} . As described above, the two optical function members 1A and 1B do not effectively act on the linearly polarized light L _{line (0)} because the phase differences cancel each other. Therefore, as shown in FIG. 2B, when two optical functional members 1A and 1B are arranged between two linear polarizing plates 40A and 40B, as shown in FIG. The linearly polarized light L _{line (0)} can be advanced as in the case where no two optical functional members are arranged between the linearly polarizing plates 40A and 40B. For example, when the polarization directions of the linear polarizing plates 40A and 40B are orthogonal, the linearly polarized light L _{line (0)} is absorbed by the linear polarizing plate 40B. In FIG. 2C, two optical functional members that do not exist are indicated by broken lines for ease of explanation.

  FIG. 3 is a schematic cross-sectional view illustrating an example of a liquid crystal display device using the color filter substrate of the present disclosure. As shown in FIG. 3, a liquid crystal display device 100 of the present disclosure includes a liquid crystal panel including a color filter substrate 10, a counter substrate 20, and a liquid crystal layer 30 disposed between the color filter substrate 10 and the counter substrate 20. 100A. The liquid crystal display device 100 may further include, for example, a backlight 50, a first linear polarizing plate 40A, and a second linear polarizing plate 40B. The first linear polarizing plate 40A and the second linear polarizing plate 40B are arranged, for example, so that the polarization directions are orthogonal.

FIG. 4 is an explanatory diagram illustrating the behavior of light source light (transmitted light) and external light (reflected light) in the liquid crystal display device shown in FIG. It should be noted that the counter substrate is omitted in FIG. 4 for ease of explanation.
First, the behavior of the light source light T will be described.
In the liquid crystal display device 100, the light source light T emitted from the backlight 50 is natural light _Lom including light in all vibration directions. In the liquid crystal display device 100, the linearly polarized light L _{line (0)} having a vibration direction in one direction is emitted from the first linearly polarizing plate 40A out of the natural light L _om of the light source light T, and is incident on the liquid crystal layer 30. . The linearly polarized light L _{line (0)} is converted into a linearly polarized light L _{line (90)} by, for example, a phase difference of + λ / 2 generated by the liquid crystal material in the liquid crystal layer 30. Then, the linearly polarized light _{L line (90)} is converted into circularly polarized light _{L c} by being incident on the optical function member 1A. Circularly polarized light L _c, a color filter member 3, it is incident on the support member 2, and a touch panel member 4, and is further converted from the circularly polarized light L _c by being incident on the optical function member 1B to the linearly polarized light L _{line (90)} . The linearly polarized light L _{line (90)} has a vibration direction parallel to the polarization direction of the second linearly polarizing plate 40B. Therefore, the linearly polarized light L _{line (90)} passes through the second linearly polarizing plate 40B and is observed by an observer.

Next, the external light R will be described.
In the liquid crystal display device 100, the external light R is omnidirectional light _Lom . When the external light R is incident on the second linear polarizing plate 40B, the linearly polarized light L _{line (90)} having a vibration direction in one direction is selected from the omnidirectional light L _om . Linearly polarized light _{L line (90)} is converted into circularly polarized light _{L c} by being incident on the optical function member 1B. Next, the circularly-polarized light _Lc is reflected by the configuration of the color filter member 3, so that the phase is changed by λ / 2. For example, if circularly polarized light L _c of the front reflector is a clockwise circularly polarized light, circularly polarized light L _c after reflection _(Rev) is the counterclockwise circularly polarized light. The reflected circularly polarized light _{Lc (Rev)} is converted into linearly polarized light L _{line (0)} by being incident on the optical function member 1B again. The linearly polarized light L _{line (0)} cannot transmit through the second linearly polarizing plate 40B because the vibration direction is orthogonal to the polarization direction of the second linearly polarizing plate 40B. Therefore, the observer does not observe the linearly polarized light L _{line (0)} . Therefore, a decrease in visibility due to external light reflection can be suppressed.

  As described above, in the liquid crystal display device using the color filter substrate according to the present disclosure, the phase difference layers of the two optical function members take an optical compensation state in which the phase differences cancel each other, thereby achieving bright display. Thus, the transmission of the light from the light source can be prevented. Although not shown, light source light can be prevented from transmitting in dark display. Therefore, it is preferable that the retardation layers of the two optical function members have the same retardation value.

  According to the present disclosure, by providing a color filter member and a touch panel member between two optical function members, when a liquid crystal display device having a touch panel is used, display visibility in a bright environment is improved. A color filter substrate capable of being used.

As described above, when the touch panel having the sensor electrode layers arranged in a pattern is combined with a display device, the visibility of the sensor electrode layers may be reduced due to the sensor electrode layer being viewed from the display surface side. . In response to this problem, the inventors of the present disclosure have conducted intensive studies, and as a result, by disposing the touch panel member between two optical function members, a reduction in display visibility due to the sensor electrode layer being viewed. Has been found to be able to suppress.
Here, one of the reasons why the display visibility is reduced due to the visual recognition of the sensor electrode layer is that the touch panel member has a region where the sensor electrode layer is disposed and a region where the sensor electrode layer is not disposed. Since there is a difference in the reflection characteristics, it is assumed that the difference in the intensity of the reflected light of the external light is observed by the observer. On the other hand, in the present disclosure, by changing the polarization state of the external light and the reflected light using the optical function member, it is possible to suppress the reflected light from being emitted to the outside of the liquid crystal display device. For this reason, since it is possible to suppress the observation of the reflected light irrespective of the intensity of the reflected light of the external light, it is presumed that it is possible to suppress a decrease in display visibility due to the sensor electrode layer being visually recognized. Is done.

  The inventors of the present disclosure who have obtained the above knowledge have proposed a liquid crystal display having a touch panel by sandwiching a touch panel member between two optical function members together with a color filter member in which display visibility due to external light reflection is problematic. A color filter substrate capable of improving display visibility in a bright environment when the device is used was completed.

  By the way, conventionally, for a bone appearance of a sensor electrode layer in a touch panel member, for example, index matching composed of a laminate of a high refractive index layer and a low refractive index layer on a substrate on which the sensor electrode layer is disposed Measures such as forming a layer (invisible layer) have been taken. However, when the invisible layer is used, it is difficult to suppress the reflection of external light from inside the liquid crystal display device, that is, from the color filter member. In contrast, in the present disclosure, by disposing the color filter member and the touch panel member between the two optical function members, the display visibility is reduced by the sensor electrode layer of the touch panel member, and the external light reflection of the color filter member causes Both of the reduction in display visibility can be suppressed. Further, the invisible layer may be complicated in formation method, for example, it is necessary to form an inorganic material film a plurality of times by a sputtering method, and may require special equipment. On the other hand, in the present disclosure, it is possible to suppress a decrease in display visibility due to the sensor electrode layer by a relatively simple method such as disposing a sensor electrode layer between two optical function members.

  Patent Documents 6 to 9 disclose liquid crystal display devices having a touch panel in which a liquid crystal cell and a touch panel are sandwiched between two circularly polarizing plates in order from the backlight side. However, in the liquid crystal display device having the above configuration, the driving mode of the liquid crystal layer must be changed from a conventionally used driving mode (for example, a driving mode in which linearly polarized light is rotated by 90 °) to a circularly polarized light mode. In addition, there is a problem that the difficulty in designing and manufacturing the liquid crystal panel increases. On the other hand, in the present disclosure, a configuration in which the liquid crystal layer is not disposed between the two optical function members can be adopted, so that the liquid crystal layer can be driven in a conventionally used drive mode.

  Hereinafter, details of the color filter substrate of the present disclosure will be described.

1. Laminated structure The color filter substrate of the present disclosure may have a support member, a color filter member, and a touch panel member disposed between two optical function members. Is not particularly limited. For example, as shown in FIG. 1, the optical function member 1A, the color filter member 3, the support member 2, the touch panel member 4, and the optical function member 1B may be stacked in this order. For example, as shown in FIG. 5A, the optical function member 1A, the color filter member 3, the touch panel member 4, the support member 2, and the optical function member 1B may be stacked in this order. For example, as shown in FIG. 5B, the optical function member 1A, the touch panel member 4, the color filter member 3, the support member 2, and the optical function member 1B may be stacked in this order.
The stacking order of each member on the color filter substrate can be appropriately selected according to the configuration of each member.

  Next, details of each component in the color filter substrate of the present disclosure will be described.

2. Optical Function Members In the color filter substrate, the two optical function members are members arranged with the support member, the color filter member, and the touch panel member interposed therebetween. Note that a laminate of the support member, the color filter member, and the touch panel member may be described as a “laminated member”. Hereinafter, the optical functional member disposed on one surface side of the laminated member is referred to as a first optical functional member, and the optical functional member disposed on the other surface side of the laminated member is referred to as a second optical functional member. May be explained. Further, a layer constituting the first optical function member will be referred to as a “first” layer, and a layer constituting the second optical function member will be referred to as a “second” layer.

The two optical function members according to the present disclosure have a function of canceling out (cancelling) the retardation of the retardation layers. The optical function member preferably functions as, for example, a λ / 4 member.
In the present disclosure, the two optical function members are arranged so as to have an optical compensation state that cancels out (cancels) the phase difference between the retardation layers.

(1) Retardation Layer The retardation layer in the present disclosure is a layer containing a liquid crystal material. The retardation layer is a layer having a predetermined retardation value such that an optically-compensated state can be obtained for the optical functional member. The retardation layer is, for example, preferably a layer having a retardation value having a function as a λ / 4 member, and more specifically, preferably having a retardation value equivalent to λ / 4.

In this specification, the phase difference value indicates an in-plane retardation value.
The in-plane retardation value is an index indicating the degree of birefringence in the in-plane direction of the refractive index anisotropic body, and the refractive index in the slow axis direction having the largest refractive index in the in-plane direction is Nx, When the refractive index in the fast axis direction perpendicular to the axial direction is Ny, and the thickness in the direction perpendicular to the in-plane direction of the refractive index anisotropic body is d,
Re [nm] = (Nx−Ny) × d [nm]
Is the value represented by The in-plane retardation value (Re value) can be measured by, for example, a parallel Nicol rotation method using KOBRA-WR manufactured by Oji Scientific Instruments. Further, the in-plane retardation value of the minute region can also be measured using a Mueller matrix with AxoScan manufactured by AXOMETRICS (USA). In the specification of the present application, unless otherwise specified, the in-plane retardation value means a value at a wavelength of 550 nm.

(I) Configuration of Retardation Layer The retardation layer in the present disclosure is a layer containing a liquid crystal material. In the retardation layer, usually, the liquid crystal material is fixed in a state of being oriented in the length direction of the retardation layer. The retardation layer is preferably a layer that imparts a function as a λ / 4 member to the optical function member.

(Liquid crystal material)
The liquid crystal material included in the retardation layer is not particularly limited as long as it is a material that can impart desired optical functionality to the retardation layer. Among them, a liquid crystal material exhibiting photosensitivity is preferable, and a liquid crystal material exhibiting a nematic phase is particularly preferably used. This is because nematic liquid crystals can be more easily arranged regularly than liquid crystal materials exhibiting other liquid crystal phases.

  Further, as the liquid crystal material in the present disclosure, it is preferable to use a polymerizable liquid crystal material having a polymerizable functional group. This is because the polymerizable liquid crystal materials can be polymerized with each other via the polymerizable functional group, so that the mechanical strength of the retardation 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, electron beams, or heat. Typical examples of the polymerizable functional group include a radical polymerizable functional group and a cationic polymerizable functional group. Further, typical examples of the radical polymerizable functional group include a functional group having at least one addition-polymerizable ethylenically unsaturated double bond, and specific examples thereof include a vinyl group having or not having a substituent, An acrylate group (a general term including an acryloyl group, a methacryloyl group, an acryloyloxy group, and a methacryloyloxy group) is exemplified. Further, specific examples of the cationically polymerizable functional group include an epoxy 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.

Note that the polymerizable liquid crystal material may have a plurality of polymerizable functional groups, or may have only one. Further, those having a plurality of polymerizable functional groups and those having only one may be used as a mixture.
Further, specific examples of the polymerizable liquid crystal material include, for example, compounds described in JP-A-7-258538, JP-T-10-508882, and JP-A-2003-287623.

  One of the above liquid crystal materials may be used, or two or more of them may be used in combination. In the present disclosure, when two or more types of liquid crystal materials are used as a mixture, a polymerizable liquid crystal material and a liquid crystal material having no polymerizable functional group may be used as a mixture.

  In the present disclosure, it is preferable that the liquid crystal materials of the retardation layers in the two optical function members are the same. This is because the wavelength dispersion of the retardation layers of the two optical function members and the uniformity of the thermal change characteristics of the retardation values can be made higher, so that the optical compensation state can be further improved.

  Here, "the liquid crystal material of the retardation layers in the two optical function members is the same" means not only that the liquid crystal materials contained in the two retardation layers are of the same kind and have the same composition, but also that the wavelength dispersion property is high. Includes those with equivalent thermal changes.

(Other)
The in-plane retardation value of the retardation layer may be in a range where an optical compensation state can be obtained, and for example, is preferably in a range corresponding to λ / 4 minutes. When the in-plane retardation value of the retardation layer corresponds to λ / 4 minutes, for example, it is preferably from 100 nm to 160 nm, more preferably from 110 nm to 150 nm, and more preferably from 120 nm to 140 nm. More preferred. When the thickness of the retardation layer is set to a distance within a range where the in-plane retardation value of the retardation layer is equivalent to λ / 4 minutes, the specific distance is determined by a retardation layer described later. Can be appropriately determined according to the type of liquid crystal material included in the liquid crystal material. For example, when a general liquid crystal material is used, the thickness of the retardation layer can be set to 0.5 μm or more and 5 μm or less.

  The retardation layer is a member that transmits light emitted from a backlight when the color filter substrate of the present disclosure is used in, for example, a liquid crystal display device. Therefore, the retardation layer in the present disclosure preferably has a predetermined transparency. Here, “transparent” means that it is transparent enough to transmit light emitted from a backlight unless otherwise specified. Note that the specific transmittance of the retardation layer can be the same as that of a retardation layer used for a general optical function member, and thus description thereof is omitted.

(Ii) Properties of Retardation Layer In the present disclosure, it is preferable that the retardation layers of the two optical function members have the same wavelength dispersion and the same heat change characteristic of the retardation value. That is, the first retardation layer of the first optical function member and the second retardation layer of the second optical function member may have the same wavelength dispersion and the same heat change characteristic of retardation value. preferable.

  Here, the inventors of the present disclosure have further studied the reason why the contrast is reduced in the liquid crystal display device in which the color filter member is disposed between the two optical function members, and have studied the phase difference containing the liquid crystal material. The layer was found to change the retardation value due to heat.

  In the optical function member, a retardation layer containing a liquid crystal material is disposed so as to be laminated on the color filter member. Further, the optical function member is arranged on the color filter member before manufacturing the liquid crystal panel. Therefore, in the process of manufacturing a liquid crystal panel, when heat treatment is performed on the color filter member and the optical function member, a difference occurs in the amount of phase difference between the two optical function members, and the optical compensation state is destroyed. I learned that

  The inventors of the present disclosure who have obtained the above-mentioned knowledge have proposed a thermal change characteristic of a retardation value between a first retardation layer of a first optical functional member and a second retardation layer of a second optical functional member. Have been found to be able to suppress a decrease in contrast by making the same. When assembling the liquid crystal display device, even if the first retardation layer and the second retardation layer have the same amount of retardation, if the heat change characteristics of the retardation values are different, the use environment after the production Due to such temperatures, a difference occurs in the amount of phase difference between the first retardation layer and the second retardation layer, the optical compensation state is lost, and the contrast is reduced. On the other hand, when the thermal change characteristics of the retardation values of the first retardation layer and the second retardation layer are the same, the retardation of the first retardation layer depends on the temperature of the use environment after the manufacture. Since the thermal change of the value and the thermal change of the retardation value of the second retardation layer are the same, the optically compensated state can be maintained, and the decrease in contrast can be suppressed.

  Further, when the wavelength dispersion of the retardation layers of the two optical function members is different, the difference of the retardation values due to heating increases the difference of the retardation values on the short wavelength side or the long wavelength side of the visible light region, thereby increasing the contrast. It is feared that the decrease will be more remarkable. In contrast, in the present disclosure, in addition to making the thermal change characteristics of the retardation values of the first retardation layer and the second retardation layer the same, the wavelength dispersion of the retardation values is made the same. As a result, a decrease in contrast can be further reduced.

  Therefore, in the present disclosure, both the first retardation layer of the first optical function member and the second retardation layer of the second optical function member contain a liquid crystal material, and have a wavelength dispersion property and a phase difference. Since the heat change characteristics of the phase difference values are the same, a color filter substrate that can suppress a decrease in contrast in the liquid crystal display device can be obtained. Specifically, since the heat change characteristics of the retardation values in the first retardation layer of the first optical function member and the second retardation layer of the second optical function member are the same, the color filter substrate When the heat treatment is performed on the first optical functional member, the retardation values of the first retardation layer of the first optical functional member and the second retardation layer of the second optical functional member change in the same manner. Can be maintained. Further, since the first retardation layer of the first optical function member and the second retardation layer of the second optical function member have the same wavelength dispersion, optical compensation is performed over a wide range of the visible light region. The condition can be improved. Therefore, a decrease in contrast due to light leakage on the short wavelength side or the long wavelength side of the visible light region can be suppressed.

  In addition, the inventors of the present disclosure have found that, once a phase difference layer containing a liquid crystal material is heat-treated at a high temperature, a change in the phase difference amount of the phase difference layer due to a subsequent heat treatment is suppressed and reduced. did. The inventors having obtained the above-mentioned knowledge have stated that since both the first retardation layer and the second retardation layer contain a liquid crystal material, by performing an annealing treatment during the production of the color filter substrate, It has been found that a change in retardation value due to heat can be suppressed. That is, since both the first retardation layer and the second retardation layer contain a liquid crystal material, the retardation values of the first retardation layer and the second retardation layer after the annealing process are reduced. Based on this, the optical compensation state of the first optical function member and the second optical function member can be designed. Therefore, a color filter substrate which can suppress a decrease in contrast in a liquid crystal display device can be provided.

Here, the reason why the retardation value of the retardation layer changes due to heat is presumed as follows. That is, as shown in FIG. 6A, in the retardation layer 11, the liquid crystal material 11a is fixed in an alignment state arranged in a specific direction _Dor . It is presumed that when heat is applied to the retardation layer, as shown in FIGS. 6B and 6C, the alignment state is disturbed in a part of the liquid crystal material 11a, so that the retardation value decreases. In addition, as shown in FIGS. 6B and 6C, it is estimated that the disorder of the alignment state varies depending on the amount of heat (heating temperature) applied to the retardation layer.

  On the other hand, after annealing the phase difference layer at a high temperature, the reason why the change of the phase difference layer due to the subsequent heat treatment is suppressed is presumed as follows. That is, by annealing the retardation layer at a high temperature, as shown in FIG. 7A, the liquid crystal material 11a in which the alignment state is disordered is fixed again in the retardation layer 11 and takes a stable state. It is presumed to be. Therefore, even when heat is applied to the retardation layer 11 after the annealing process, it is estimated that the orientation state of the liquid crystal material 11a in the retardation layer 11 is unlikely to change as shown in FIG. 7B.

  In the present disclosure, as described above, for example, when the liquid crystal materials of the first retardation layer and the second retardation layer are the same, heat of the first retardation layer and the second retardation layer By making the histories the same, it is possible to make the amounts of change of the phase difference values of the first phase difference layer and the second phase difference layer the same. In this case, an annealing process described later can be omitted. As an example of the manufacturing process, when forming the spacer member and the transparent electrode, the first optical functional member and the second optical functional member are subjected to the same heat treatment so that the first retardation layer and the second optical functional member are processed. The heat history of the phase difference layer can be made comparable. In this case, the amounts of change in the retardation values of the first retardation layer and the second retardation layer due to the heat treatment can be made equal. Further, since the first retardation layer and the second retardation layer are subjected to the same heating in the manufacturing process, even if the first retardation layer and the second retardation layer are subjected to heating such as a reliability test, the first retardation layer and the second retardation layer are not heated. The amount of change in the retardation value of the retardation layer can be made equal. Therefore, the optical compensation state can be maintained. Furthermore, by annealing the first retardation layer and the second retardation layer, the amount of change in the amount of retardation in the manufacturing process can be kept small.

(Wavelength dispersion)
In the present disclosure, it is preferable that the retardation layers of the two optical function members have the same wavelength dispersion. That is, it is preferable that the first retardation layer and the second retardation layer have the same wavelength dispersion.

The “wavelength dispersion of the retardation layer” will be described.
Here, depending on the type of liquid crystal material, the first retardation layer and the second retardation layer do not show the same retardation value in the entire visible light region, and the retardation value on the short wavelength side and the long retardation value The phase difference value on the wavelength side may be different. Specifically, depending on the material used for the first retardation layer and the second retardation layer, the retardation value on the short wavelength side in the visible light region is larger than the retardation value on the long wavelength side, In some cases, the phase difference value on the short wavelength side is smaller than the phase difference value on the long wavelength side.
Thus, the property that the phase difference value changes according to the wavelength in the visible light region is referred to as wavelength dispersibility.

The “wavelength dispersion of the retardation layer” in the present disclosure is quantified as follows.
Regarding the retardation values Re of the first retardation layer and the second retardation layer, the retardation values Re of the first retardation layer and the second retardation layer in a visible light region (for example, 400 nm or more and 700 nm or less) are used. Is measured. From the measured value, the ratio Re (x) / Re (550) of the phase difference value Re (x) at the wavelength xnm (x satisfies 400 ≦ x ≦ 700) to the phase difference value Re (550) at the wavelength 550 nm is obtained. calculate. The wavelength dispersion in the visible light range is represented by the horizontal axis, and the vertical axis is represented by Re (x) / Re (550). For example, the slope of the solid line graph shown in FIG.

  Further, “the wavelength dispersion properties of the two retardation layers are the same” means that the value of Re (x) / Re (550) of the first retardation layer at a wavelength of 400 nm or more and 700 nm or less in the above-described graph. And the value of Re (x) / Re (550) of the second retardation layer is within a range of ± 5%, and preferably within a range of ± 2%.

  Specifically, “the wavelength dispersion of the two retardation layers is the same” means that, when the solid line graph shown in FIG. 8 is the graph of the first retardation layer, the graph of the second retardation layer is Are present in the hatched area.

(Thermal change characteristic of phase difference value)
In the present disclosure, it is preferable that the retardation layers of the two optical function members have the same heat change characteristic of the retardation value. That is, it is preferable that the first retardation layer and the second retardation layer have the same heat change characteristic of the retardation value.

  "The thermal change characteristics of the retardation values of the two retardation layers are the same" means that when the color filter is heat-treated at the temperature in the manufacturing process of the liquid crystal display device using the color filter substrate of the present disclosure, It means that the amount of change in the retardation value of each of the first retardation layer and the second retardation layer is within a range of ± 5%, and preferably within a range of ± 2%. In the present disclosure, it is preferable that the amount of change in the retardation value of the first retardation layer and the second retardation layer in the entire range of wavelengths from 400 nm to 700 nm be within the above-described range.

(2) Fixed layer In the present disclosure, both of the two optical function members are a laminate of the fixed layer and the retardation layer directly disposed on the support member, the color filter member or the touch panel member, It is preferable that the fixing layer is an alignment layer or an adhesive layer. Since the optical axes, thicknesses, and the like of the retardation layers of the two optical function members disposed on both sides of the color filter member can be matched with high accuracy, the optical compensation state of the two optical function members can be improved. Because. Further, from the viewpoint of adjusting the optical axis, the thickness, and the like of the retardation layers of the two optical function members with higher accuracy, it is preferable that both of the optical function members are a laminate of an alignment layer and a retardation layer. Since the alignment layer and the retardation layer can be directly formed on the color filter member by the coating method, the optical axes of the two retardation layers can be aligned with high accuracy.
Here, "the fixed layer is directly arranged on the color filter member" means that the fixed layer and the layer constituting the color filter member are arranged in direct contact. “The fixing layer is directly disposed on the color filter member” typically means that the fixing layer and the transparent base material layer of the color filter member are disposed in direct contact with each other. Further, it means that the fixed layer and the outermost layer on the colored layer side of the color filter member are disposed in direct contact with each other. Examples of the fixed layer include an alignment layer and an adhesive layer.

(I) Alignment layer In the present disclosure, the optical functional member is preferably a laminate of an alignment layer directly disposed on the surface of the color filter member and a retardation layer. In this case, the retardation layer is usually arranged directly on the surface of the alignment layer opposite to the color filter member side. When the optical functional member is a laminate of an alignment layer and a retardation layer, for example, the optical functional member can be arranged by directly forming an alignment layer on a color filter member and applying a liquid crystal material to the alignment layer. Therefore, the orientation direction of the retardation layer disposed on each surface of the color filter member can be accurately disposed. In addition, since the film thickness profile (in-plane distribution) of the retardation layer can be formed so as to be coincident between the front and back sides, for example, even if the retardation value of the retardation layer deviates from the set value due to a tolerance by the apparatus, In addition, the effect of canceling out the phase difference of the common difference between the front and back sides can be exhibited.
Specifically, even if there is a difference between the application amounts derived from the individual slit nozzles and a difference between the application amounts due to the individual slit coaters, the thicknesses of the retardation layers disposed on the front and back are matched at each location. The above effects can be exhibited.

  The alignment layer only needs to be able to express the interaction for arranging the liquid crystal material described above, but is preferably a member including a photo alignment material.

  Here, the “photo-alignment material” included in the alignment layer refers to a material that can exert an alignment control force by a photo-alignment method. Further, the “photo-alignment method” is a method of irradiating light (polarized light) having an arbitrary polarization state to the alignment layer to express the alignment regulating force (anisotropic) of the alignment layer. Therefore, the photo-alignment material according to the present disclosure can be said to be a material that can exert an alignment control force by irradiating polarized light. Further, the “alignment control force” means an interaction for arranging the liquid crystal material included in the retardation layer.

The thickness of the alignment layer in the present disclosure can be adjusted according to the constituent materials. The thickness of the alignment layer in the present disclosure is, for example, preferably 0.01 μm or more and 2.0 μm or less, more preferably 0.02 μm or more and 1.0 μm or less, particularly preferably 0.03 μm or more and 0.2 μm or less. Preferably, there is. When the thickness of the alignment layer in the present disclosure is within the above range, a desired alignment control force can be exerted on the liquid crystal material included in the retardation layer.
In addition, the thickness of the alignment layer in the present disclosure can be measured by, for example, observing a cross section using a scanning electron microscope (SEM).

  The alignment layer is a member that transmits light emitted from a backlight when the color filter substrate according to the present disclosure is used in a liquid crystal display device. Therefore, the alignment layer in the present disclosure preferably has a predetermined transparency. Here, “transparent” means that it is transparent enough to transmit light emitted from a backlight unless otherwise specified. Note that the specific transmittance of the alignment layer can be the same as that of an alignment layer used for a general optical function member, and a description thereof will be omitted.

The alignment material contained in the alignment layer is not particularly limited as long as it can exert an alignment regulating force by irradiating polarized light. Such photoalignment materials include a photoisomerization material that reversibly changes the alignment regulating force by changing only the molecular shape by cis-trans change, and a photoreaction material that changes the molecule itself by irradiating polarized light. And can be broadly divided into In the present disclosure, any of a photoisomerizable material and a photoreactive material can be suitably used, but a photoreactive material is more preferably used.
Since the photoreactive material expresses an alignment regulating force by the reaction of molecules when irradiated with polarized light, it becomes possible to irreversibly express the alignment regulating force. Therefore, the photoreactive material is more excellent in the alignment regulating force because of stability with time.

  The photoreactive material can be further classified according to the type of reaction produced by polarized light irradiation. Specifically, a photodimerization-type material that exhibits an alignment regulating force by generating a photodimerization reaction, a photo-coupling type material that exhibits an orientation regulation force by generating a photodecomposition reaction, and a photodecomposition reaction and a photocoupling reaction. The photo-decomposition-bonding type material which expresses the alignment regulating force by the occurrence of In the present disclosure, any of the above-described photoreactive materials can be suitably used, and among them, it is preferable to use a photodimerizable 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 exert an alignment regulating force by causing a photodimerization reaction. In the present disclosure, among others, the wavelength of light that causes a photodimerization reaction is preferably 280 nm or more, particularly preferably 280 nm or more and 400 nm or less, and more preferably 300 nm or more and 380 nm or less.

  Examples of such a photodimerization-type material include cinnamate, coumarin, benzylidenephthalimidine, benzylideneacetophenone, diphenylacetylene, stilbazole, uracil, quinolinone, maleimide, and a polymer having a cinnamylideneacetic acid derivative. In the present disclosure, among others, 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, for example, compounds described in JP-A-9-118717, JP-T-10-506420, and JP-T-2003-505561.

  The photo-alignment material used in the present disclosure may be only one type, or may be two or more types. Further, the photo-alignment material used in the present disclosure preferably has high heat resistance.

(Ii) Adhesive layer In the present disclosure, it is preferable that the optical functional member is a laminate of an adhesive layer directly disposed on the surface of the color filter member and a retardation layer. In this case, the retardation layer is usually disposed directly on the surface of the adhesive layer opposite to the color filter member side. At this time, since the optical function member can be formed by using the transfer method, the manufacturing cost of the color filter substrate can be reduced. In addition, for example, in the case where the color filter substrate is manufactured with multiple surfaces, the optical axes of the two optical function members can be accurately aligned.

  The adhesive layer is not particularly limited as long as it can bond the retardation layer and the color filter member, but is preferably an ultraviolet-curable adhesive layer. Since the ultraviolet-curable adhesive layer can reduce the thickness of the adhesive layer, the thickness of the color filter substrate can be reduced. Also, by reducing the distance between the color filter member and the optical function member, light from the backlight can be made to travel more efficiently.

  The ultraviolet-curable adhesive layer according to the present disclosure refers to a member that is cured by irradiation with ultraviolet light and exhibits adhesiveness. Further, the ultraviolet-curable adhesive layer usually has a predetermined adhesiveness before being irradiated with ultraviolet rays. Here, the predetermined adhesiveness is, for example, preferably the peel strength of the ultraviolet-curable adhesive layer on the glass plate by a 180-degree peel test specified in JIS K 6854-2 is 10 N / 25 mm width or more. The width is preferably 15 N / 25 mm width or more, particularly preferably 20 N / 25 mm width or more. Further, in the present disclosure, the peel strength of the ultraviolet-curable adhesive layer is, for example, preferably 50 N / 25 mm width or less, particularly preferably 45 N / 25 mm width or less, and particularly preferably 40 N / 25 mm width or less. It is preferable that

The thickness of the ultraviolet-curable adhesive layer in the present disclosure is, for example, preferably 10 μm or less, more preferably 5 μm or less, and particularly preferably 2 μm or less.
Further, the thickness of the ultraviolet-curable adhesive layer in the present disclosure is preferably, for example, 0.1 μm or more.
The thickness of the ultraviolet-curable adhesive layer in the present disclosure can be measured by, for example, observing a cross section using a scanning electron microscope (SEM).

The ultraviolet-curable adhesive layer according to the present disclosure is a member that transmits light emitted from a backlight when the color filter substrate according to the present disclosure is used for a liquid crystal display device. Therefore, it is preferable that the ultraviolet-curable adhesive layer in the present disclosure has a predetermined transparency. Here, “transparent” means that it is transparent enough to transmit light emitted from a backlight unless otherwise specified. For example, the total light transmittance of the ultraviolet-curable adhesive layer is preferably 80% or more, and particularly preferably 90% or more.
The total light transmittance of the ultraviolet-curable adhesive layer can be measured by a method according to JIS K7375: 2008 (plastic-method for determining total light transmittance and total light transmittance).

The ultraviolet-curable adhesive layer in the present disclosure may be a layer made of an ultraviolet-curable resin and cured by irradiation with ultraviolet light. 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, for example, ultraviolet light having a wavelength of 100 nm to 450 nm. 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 epoxy (meth) acrylate. Here, (meth) acrylate is a notation meaning acrylate or methacrylate.
In the present disclosure, one kind of these ultraviolet curable resins may be used, or two or more kinds thereof may be used in combination.

(3) Protective layer (protective layer for optical functional members)
In the present disclosure, it is preferable that the protective layer is disposed on the surface on the side opposite to the surface on the side of the laminated member with respect to the optical function member. This is because the provision of the protective layer can suppress damage to the retardation layer during transportation of the color filter substrate and the like. The protective layer can also be used as an overcoat layer covering the surface of the optical function member.
The material of the protective layer is not particularly limited as long as it can protect the optical functional member, and can be the same as a material used as a protective layer of a general color filter substrate. Examples thereof include a light-curable resin or a thermosetting resin such as a resin and an acrylic resin, and an inorganic material. Other materials include a polymerization initiator and various additives. The thickness of the protective layer can be appropriately selected according to the use of the color filter substrate. The method for forming the protective layer can be the same as the method for forming the protective layer in a general color filter, and examples thereof include known coating methods such as a spin coating method and a die coating method.

(4) Method for Forming Optical Function Member The method for forming the optical function member in the present disclosure is not particularly limited as long as it is a method that can obtain two optical function members having a desired optical compensation state. An example of a method for forming an optical function member according to the present disclosure will be described with reference to the drawings. FIG. 9 is a process diagram illustrating an example of a method for forming an optical function member according to the present disclosure. In the present disclosure, for example, as shown in FIG. 9A, a laminated member 61 is prepared. The lamination member 61 may be subjected to a cleaning process as needed. Next, as shown in FIG. 9B, a coating film 12c is formed using an alignment layer composition containing an alignment material, and the coating film is subjected to polarized light exposure and then to a heat treatment. As shown in (c), the alignment layer 12 is formed. The obtained alignment layer 12 may be subjected to a cleaning treatment. Next, as shown in FIG. 9D, a coating film 11c is formed on the alignment layer 12 using a composition for a retardation layer containing a liquid crystal material. At this time, if necessary, the coating 11c may be subjected to a drying treatment. Next, the liquid crystal material is oriented by heat-treating the liquid crystal material, and the coating film 11c is further exposed to form the retardation layer 11 as shown in FIG. Through the above steps, the optical function member 1 can be obtained.
Conditions for application method of alignment layer composition and retardation layer composition, polarization exposure method and heat treatment method for obtaining alignment layer, exposure method for obtaining retardation layer, cleaning treatment method, drying treatment method, etc. Can be the same as the conditions used in a general method for forming an alignment layer and a retardation layer, and thus description thereof will be omitted.
Further, the optical function member according to the present disclosure can also be formed using, for example, a transfer method.

3. Touch Panel Member The touch panel member in the present disclosure is a member arranged between two optical function members. The touch panel member has at least a sensor electrode layer. Further, it is preferable that the touch panel member has an insulating layer disposed so as to cover the sensor electrode layer.

(1) Sensor electrode layer The sensor electrode layer in the present disclosure is a member used for detecting the position of a touch panel member.

  The sensor electrode layer according to the present disclosure may be a transparent conductive layer having transparency, or may be a mesh-shaped mesh electrode formed by fine lines. In the case where the sensor electrode layer is a mesh-shaped mesh electrode made of fine wires, even if the material used for the sensor electrode layer is an opaque metal material, it can be an apparently transparent sensor electrode.

When the sensor electrode layer is a transparent conductive layer, the thickness and the like of the sensor electrode layer can be appropriately adjusted according to the application of the liquid crystal display device using the color filter substrate of the present disclosure, and a general sensor electrode layer Therefore, the description is omitted here.
Further, when the sensor electrode layer is a mesh electrode, the thickness, line width, pitch, aperture ratio, and the like of the sensor electrode layer may be appropriately adjusted according to the use of the liquid crystal display device using the color filter substrate of the present disclosure. Since it can be made the same as a general sensor electrode layer, the description here is omitted.

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

  The external shape in plan view of the sensor electrode layer can be the same as the external shape in plan view of the sensor electrode layer in a general touch panel member, for example, JP-A-2011-210176, JP-A-2010-238052, and the like. Can be raised.

(2) Insulating Layer The touch panel member according to the present disclosure preferably has an insulating layer disposed to cover the sensor electrode layer.

  The constituent material of the insulating layer in the present disclosure is preferably a material having a desired insulating property, and a material generally used for a touch panel can be used. Specifically, an insulating resin material such as a polyimide resin, an acrylic resin, a cardo resin, an epoxy resin, and a melamine resin, and an inorganic material such as glass can be used. In addition, as the constituent material used for the insulating layer, one type may be used alone, or two or more types may be used in combination. Further, the layer structure of the insulating layer may be a single layer or a multilayer including two or more layers.

  The thickness of the insulating layer is preferably such that the sensor electrode can be insulated to prevent 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 0.5 μm or more and 3 μm or less.

(3) Protective layer (protective layer for touch panel members)
The touch panel member according to the present disclosure may further include a protective layer. Preferably, the protective layer is disposed so as to cover the sensor electrode layer and the insulating layer. This is because the sensor electrode layer and the insulating layer can be protected and the surface of the touch panel member can be flattened. The protective layer can be used as an overcoat layer of a touch panel member. About a protective layer, since it can be the same as that which was demonstrated in the above-mentioned "2. Optical functional member (3) protective layer", description here is abbreviate | omitted. Note that, in the present disclosure, the above-described insulating layer may also serve as a protective layer.

(4) Touch Panel Member The drive system of the touch panel member in the present disclosure is not particularly limited, but is preferably a capacitance system. This is because the capacitance type touch panel member tends to particularly easily show the bones of the sensor electrode layer.

  The method for forming the touch panel member is not particularly limited, and may be the same as a general method for forming a touch panel.

4. Color filter member A color filter member in the present disclosure is a member arranged between two optical function members. The color filter member according to the present disclosure is generally disposed on one surface of a support member described below, and includes at least a colored layer.

(1) Colored layer The colored layer in the present disclosure is a layer arranged in the opening of the light shielding layer.

  The thickness of the coloring layer in the present disclosure can be the same as the thickness of the coloring layer used for a general color filter, and can be set, for example, from 1 μm to 5 μm.

  In the present disclosure, for example, it has three colored layers of red, green, and blue. The color of the coloring layer may include 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 of green, blue, yellow, and cyan may be used.

  As the coloring layer, for example, a layer in which a coloring material is dispersed in a binder resin can be used. Examples of the coloring material used for the coloring layer include pigments and dyes of each color. For example, examples of the coloring material used for the red coloring 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 coloring layer include, for example, phthalocyanine pigments such as halogen-substituted phthalocyanine pigments or halogen-substituted copper phthalocyanine pigments, triphenylmethane-based basic dyes, isoindoline-based pigments, and isoindolin-based pigments. Linone pigments and the like. Further, examples of the coloring material used for the blue coloring layer include copper phthalocyanine pigments, anthraquinone pigments, indanthrene pigments, indophenol pigments, cyanine pigments, and dioxazine pigments. These pigments and dyes may be used alone or as a mixture of two or more. Examples of the binder resin used for the coloring layer include photosensitive resins having a reactive vinyl group such as acrylate, methacrylate, polyvinyl cinnamate, or cyclized rubber.

  In the colored layer, in addition to the above-mentioned materials, if necessary, a photopolymerization initiator, a sensitizer, an applicability improver, a development improver, a cross-linking agent, a polymerization inhibitor, a plasticizer, a flame retardant, etc. It can be contained.

Further, a white layer containing a binder resin without containing the above-described coloring material may be formed on the same plane on which the colored layer is formed.
The method for forming the colored layer can be the same as the method used for a general color filter. Examples of the method for forming the colored layer include a photolithography method and an ink-jet method.

(2) Light-Shielding Layer The color filter member according to the present disclosure may further include a light-shielding layer.
The light-shielding layer according to the present disclosure is a member that is disposed on one surface of a transparent substrate and has a plurality of openings. The light-shielding layer is arranged in a region overlapping the boundary region of the coloring layer in plan view. The light-shielding layer is disposed, for example, on the surface of the transparent substrate on the colored layer side. In the color filter member, it is preferable that the transparent base material layer, the light shielding layer, and the coloring layer are laminated in this order.

The light shielding layers are arranged in parallel to extend in a first direction and a second direction intersecting the first direction, and define an opening. The shape of the opening is not particularly limited, and examples thereof include a rectangular shape, a stripe shape, and a dot shape.
Further, the width of the opening in the light-shielding layer can be the same as the width of the opening in the light-shielding layer in a general color filter substrate, and thus description thereof is omitted here.

  The line width of the light-shielding layer in the present disclosure can be appropriately selected depending on the use of the color filter substrate of the present disclosure and the like, and is not particularly limited, but is preferably, for example, 1 μm or more and 30 μm or less. It is preferably from 5 μm to 28 μm, particularly preferably from 2 μm to 25 μm. If the line width of the light-shielding layer is smaller than the above range, the opening may not be sufficiently defined. If the line width of the light-shielding layer is larger than the above range, a high-definition color filter may not be obtained. When the line width of the light shielding layer is not constant, it is preferable that the line width of the light shielding layer is all within the above range.

  The thickness of the light-shielding layer in the present disclosure is not particularly limited as long as the thickness can exhibit desired light-shielding properties, and is appropriately adjusted according to the material used for the light-shielding layer. The specific thickness of the light shielding layer in the present disclosure can be, for example, 0.5 μm or more and 3.0 μm or less.

The constituent material of the light-shielding layer in the present disclosure is not particularly limited as long as it is a material that can exhibit a desired light-shielding property. Specifically, the light-shielding layer is usually a cured product containing a black color material in a binder resin, but may contain a colored color material as needed in addition to the black color material. The constituent material of the light-shielding layer can be the same as the material used for a general color filter substrate, and thus the description is omitted here.
The method for forming the light-shielding layer can be the same as the method for forming a light-shielding layer in a general color filter, and examples thereof include a photolithography method.

(3) Protective layer (protective layer for color filter member)
The color filter member according to the present disclosure may further have a protective layer.
The protective layer is a layer disposed on the surface of the transparent base material layer on the colored layer side. Further, it is preferable that the protective layer is disposed so as to cover the coloring layer and the light shielding layer. This is because the coloring layer and the light shielding layer can be protected and the surface of the color filter member can be flattened. The protective layer can be used as an overcoat layer of a color filter member.
About a protective layer, since it can be the same as that which was demonstrated in the above-mentioned "2. Optical functional member (3) protective layer", description here is abbreviate | omitted.

5. Support Member A support member in the present disclosure is a member used to support a color filter member and a touch panel member.
The color filter substrate of the present disclosure generally has at least one support member.

As the support member, for example, a transparent substrate can be used.
Here, the term “transparent” refers to a degree of transparency that does not hinder a viewer of a liquid crystal display device using the color filter substrate of the present disclosure from observing from an observation surface, unless otherwise specified.
Therefore, “transparent” includes colorless and transparent, and colored and transparent to the extent that visibility is not impaired, and is not defined by a strict transmittance, and the degree of transparency is determined according to the use of the color filter substrate or the like of the present disclosure. Can be determined.

  The thickness of the transparent base material according to the present disclosure is not particularly limited as long as it can support each member, and can be appropriately designed according to the use of the color filter substrate according to the present disclosure. 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 substrate, the description is omitted here.

The material of the transparent base material in the present disclosure is not particularly limited as long as it is a material used for a general color filter substrate, but preferably has heat resistance.
Examples of the transparent substrate include non-flexible inorganic substrates such as quartz glass, Pyrex (registered trademark) glass, and synthetic quartz plates, and flexible resin substrates such as transparent resin films and optical resin plates. And the like. Among them, an inorganic substrate is preferably used, and among the inorganic substrates, a glass substrate is preferably used. Further, it is preferable to use an alkali-free glass substrate among the glass substrates. Alkali-free type glass substrates are excellent in dimensional stability and workability in high-temperature heat treatment, and because they do not contain alkali components in glass, they are suitable for, for example, color filter substrates used in liquid crystal display devices. It is.

  In the present disclosure, it is usually sufficient to have at least one support member. Further, for example, two support members, a support member for supporting the color filter member and a support member for supporting the touch panel member, may be provided. In this case, the color filter member and the touch panel member are laminated via an adhesive layer.

6. Other Configurations The color filter substrate according to the present disclosure may include the above-described optical function member and the color filter member, and a necessary configuration may be appropriately selected and added. As another configuration, for example, as shown in FIG. 5B, a spacer member 5 can be given. The spacer member is usually formed on the optical function member on the side facing the liquid crystal layer when the liquid crystal display device is used. Further, as other configurations, for example, a linear polarizing plate, a front plate, and the like can be given. Note that these configurations can be the same as those used in a general liquid crystal display device, and thus description thereof is omitted.

7. Manufacturing Method The method for manufacturing a color filter substrate according to the present disclosure is not particularly limited as long as a color filter substrate having the above-described configuration can be obtained. An example of a method for forming a color filter substrate according to the present disclosure will be described with reference to the drawings. 10A to 10H are process diagrams illustrating an example of a method for manufacturing a color filter substrate according to the present disclosure. In the present disclosure, for example, as shown in FIG. 10A, the color filter member 3 is formed on one surface of the support substrate 2. Next, as shown in FIG. 10B, the touch panel member 4 is formed on the surface on the side opposite to the color filter member 3 side with respect to the support base material 2. Next, as shown in FIGS. 10C to 10E, the optical function member 1B is formed by forming the alignment layer 12B, the retardation layer 11B, and the protective layer 13B on the touch panel member 4. Next, as shown in FIGS. 10F to 10H, the optical function member 1A is formed by forming the alignment layer 12A, the retardation layer 11A, and the protective layer 13A on the color filter member 3. Through the above steps, the color filter substrate 10 can be obtained.
The method of forming the color filter member, the touch panel member, and the optical function member can be the same as that described in each of the above items, and thus the description is omitted here.

  The method for manufacturing a color filter substrate according to the present disclosure may include, after the first optical function member arranging step and the second optical function member arranging step, an annealing step of annealing the color filter substrate. preferable. Further, it is preferable that the temperature of the annealing treatment is equal to or higher than the highest temperature of the heat treatment in the manufacturing process of the liquid crystal display device using the color filter substrate.

  In the present disclosure, by performing the annealing process, the retardation values of the first retardation layer and the second retardation layer in the obtained color filter substrate are changed by the heat treatment in the subsequent manufacturing process of the liquid crystal display device. Can be suppressed. Therefore, the liquid crystal is designed by designing the optical compensation states of the first optical function member and the second optical function member based on the phase difference values of the first phase difference layer and the second phase difference layer after the annealing process. A color filter substrate capable of improving contrast when used as a display device can be obtained.

  The annealing process according to the present disclosure is a process of performing an annealing process on a color filter substrate, and more specifically, performing an annealing process on a first optical functional member and a second optical functional member disposed on a color filter substrate. It is a process. In the annealing process, the temperature of the annealing process is set to a temperature equal to or higher than the highest temperature of the heat treatment in the manufacturing process of the liquid crystal display device using the color filter substrate.

  Here, “the maximum temperature of heat treatment in the process of manufacturing a liquid crystal display device using a color filter substrate” refers to a color filter when manufacturing a liquid crystal display device using the color filter substrate obtained according to the present disclosure. The highest temperature among the heat treatment temperatures applied to the first optical function member and the second optical function member disposed on the substrate. Hereinafter, it may be simply referred to as “maximum temperature”.

  The temperature of the annealing treatment is appropriately selected according to the type of the substrate, the material, and the like used for the liquid crystal display device together with the obtained color filter substrate, and the manufacturing conditions of the liquid crystal display device, and is not limited. The temperature of the annealing treatment may be, for example, 150 ° C. or more and 250 ° C. or less, or 200 ° C. or more and 230 ° C. or less. Conditions such as annealing time and atmosphere are appropriately selected according to the type of material and the manufacturing conditions of the liquid crystal display device.

In the present disclosure, the conditions of the annealing may be determined by the following method.
For example, a sample for evaluation having the same material and thickness as the first retardation layer and the second retardation layer is formed on a glass substrate. The temperature of the annealing process is applied to the evaluation sample, and the change of the phase difference value with time is measured, and the time at which no change is observed in the phase difference value is obtained (for example, X time in the graph of FIG. 11). Further, for example, when the evaluation sample subjected to the X-hour annealing treatment is heated for reliability evaluation, the change in the phase difference value of the first retardation layer and the second retardation layer is as described above. Confirm that the values are as described in “2. Optical Functional Member”.

8. Color filter substrate The color filter substrate of the present disclosure is used for a liquid crystal display device. The color filter substrate of the present disclosure is preferably used for, for example, a transmission type liquid crystal display device.

B. Liquid crystal display device The liquid crystal display device of the present disclosure includes a color filter substrate described in the above section “A. Color filter substrate”, a counter substrate, and a liquid crystal layer disposed between the color filter substrate and the counter substrate. And at least a liquid crystal panel having:
As an example of the liquid crystal display device of the present disclosure, the liquid crystal display device 100 shown in FIG.

  According to the present disclosure, a liquid crystal display device having good display visibility in a bright environment can be provided by including the above-described color filter substrate.

  The color filter substrate used for the liquid crystal panel in the liquid crystal display device according to the present disclosure can be the same as that described in the above section “A. Color filter substrate”, and thus the description is omitted here. Further, the counter substrate and the liquid crystal layer according to the present disclosure can be the same as those used for a general liquid crystal display device, and thus description thereof is omitted.

In the liquid crystal display device, necessary components other than the liquid crystal panel described above can be appropriately selected and added. Other configurations include, for example, a linear polarizing plate, a backlight, a front plate, and the like. The liquid crystal display device of the present disclosure is preferably a transmission type liquid crystal display device.
The liquid crystal display device of the present disclosure can be applied to, for example, a television, a personal computer, a smartphone, a tablet terminal, and the like.

C. Laminate The laminate of the present disclosure is a laminate used in the liquid crystal display device described in the above section “B. Liquid Crystal Display Device”, and is arranged in the support member, the color filter member, and the pattern. A laminated member having the touch panel member having the sensor electrode layer, and the optical function member disposed on one surface side of the laminated member.

  FIG. 12 is a schematic cross-sectional view illustrating an example of the laminate of the present disclosure. As shown in FIG. 12, a laminate 60 of the present disclosure includes a laminate 61 having a support member 2, a color filter 3, and a touch panel 4 having a sensor electrode layer 41 arranged in a pattern, and a laminate 61. And an optical function member 1 having a retardation layer 11.

  According to the present disclosure, by having the above-described laminated structure, with respect to the laminated member, on the surface opposite to the surface on which the optical functional member is disposed, by disposing another optical functional member, The liquid crystal display device can be obtained.

  The color filter member, the touch panel member, and the optical function member constituting the laminate member used in the laminate of the present disclosure can be the same as those described in the section “A. Color filter substrate” above. The description here is omitted.

  Note that the present disclosure is not limited to the above embodiment. The above-described embodiment is an exemplification, and has substantially the same configuration as the technical idea described in the claims of the present disclosure, and any device having the same function and effect can be realized by the present invention. It is within the technical scope of the disclosure.

  Hereinafter, the present disclosure will be described in more detail with reference to Examples.

[Example 1]
(Preparation of copolymer resin solution)
63 parts by mass of methyl methacrylate (MMA), 12 parts by mass of acrylic acid (AA), 6 parts by mass of 2-hydroxyethyl methacrylate (HEMA), and 88 parts by mass of diethylene glycol dimethyl ether (DMDG) are charged in a polymerization tank. After stirring and dissolving, 7 parts by mass of 2,2′-azobis (2-methylbutyronitrile) was added and uniformly dissolved. Thereafter, the mixture was stirred at 85 ° C. for 2 hours under a nitrogen stream, and further reacted at 100 ° C. for 1 hour. 7 parts by mass of glycidyl methacrylate (GMA), 0.4 parts by mass of triethylamine, and 0.2 parts by mass of hydroquinone were further added to the obtained solution, and the mixture was stirred at 100 ° C. for 5 hours, and the copolymer resin solution ( (50% solids).

(Synthesis of curable resin composition)
The following materials were stirred and mixed at room temperature to obtain a curable resin composition.
<Composition of curable resin composition>
• The above copolymer resin solution (solid content: 50%): 16 parts by mass • Dipentaerythritol pentaacrylate (trade name: SR399, manufactured by Sartomer)
... 24 parts by mass ortho-cresol novolak type epoxy resin (trade name: Epicoat 180S70, manufactured by Yuka Shell Epoxy Co., Ltd.) ... 4 parts by mass 2-methyl-1- (4-methylthiophenyl) -2-morpholinopropane-1 -On (trade name: Irgacure 907, manufactured by Ciba Specialty Chemicals) 4 parts by weightDiethylene glycol dimethyl ether (manufactured by Junsei Chemical) 52 parts by weight

(Preparation of composition for light-shielding layer)
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 mass ・ Polymer dispersant (Bik Chemie Japan Co., Ltd. Disperbyk111): 2 parts by mass ・ Solvent (diethylene glycol dimethyl ether): 75 parts by mass

Next, the following components were sufficiently mixed to obtain a composition for a light-shielding layer.
<Composition of composition for light-shielding layer>
-Black pigment dispersion liquid: 61 parts by weight-Curable resin composition: 20 parts by weight-Diethylene glycol dimethyl ether: 30 parts by weight

(Preparation of composition for colored layer)
Each of the red, green, and blue color layer compositions was prepared by mixing a pigment and a dispersant in the following amounts and sufficiently dispersing the mixture in a sand mill to prepare a color pigment dispersion. Next, the colored pigment dispersion, the curable resin composition, and the solvent were mixed in respective amounts to obtain a composition for forming a colored layer.

<Composition of composition for red coloring layer>
・ C. I. Pigment Red 254: 7 parts by mass. Polysulfonic acid type polymer dispersant: 3 parts by mass. The curable resin composition: 23 parts by mass.-3-methoxybutyl acetate: 67 parts by mass.

<Composition of composition for green coloring layer>
・ C. I. Pigment Green 58 7 parts by mass. I. Pigment Yellow 138: 1 part by mass. Polysulfonic acid type polymer dispersant: 3 parts by mass. The curable resin composition: 22 parts by mass.-3-methoxybutyl acetate: 67 parts by mass.

<Composition of composition for blue colored layer>
・ 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

(Production of color filter member)
A color filter member was formed on one surface of the support member by the following procedure.

(Formation of light shielding layer)
A glass substrate (AN material, Asahi Glass Co., Ltd.) having a thickness of 0.7 mm was prepared as a supporting member. The composition for a light-shielding layer was applied on a support member 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. After exposing the light-shielding layer to a light-shielding pattern (a stripe pattern having a repetition of RGB of 75 μm pitch) with an ultra-high pressure mercury lamp, the light-shielding layer is developed with a 0.05 wt% aqueous potassium hydroxide solution. By leaving it for 30 minutes, a heat treatment was performed to form a light-shielding layer having a plurality of openings.

(Formation of red colored layer)
The indicator substrate having the light-shielding layer formed as described above is irradiated with a low-pressure mercury UV lamp from the light-shielding layer forming side to form a first region. Was applied to the first region (application thickness: 2.0 μm), and then dried in an oven at 70 ° C. for 3 minutes. Next, a photomask is arranged at a distance of 100 μm from the coating film of the composition for forming a red coloring layer, and ultraviolet rays are applied to only a region corresponding to a formation region of the coloring portion by using a 2.0 kW ultra-high pressure mercury lamp using a proximity liner. Irradiated for 10 seconds. Next, the film was immersed in a 0.05 wt% aqueous solution of potassium hydroxide (solution temperature 23 ° C.) for 1 minute to carry out alkali development, thereby removing only the uncured portion of the coating film of the composition for a red colored layer. Thereafter, the substrate was left in an atmosphere of 230 ° C. for 25 minutes to perform a heat treatment to form a red relief pattern (red colored layer) in the opening of the light-shielding layer.

(Formation of green coloring layer)
Next, a second region is formed in the same manner as in the light irradiation step described above, and the green region is formed in the second region by using the green coloring layer composition having the above-described composition in the same process as the formation of the red relief pattern. A relief pattern (green colored layer) was formed.

(Formation of blue colored layer)
Further, a third region is formed in the same manner as in the above-described light irradiation step, and a blue relief pattern is formed in the third region by using the composition for a blue colored layer having the above-described composition in the same manner as in forming the red relief pattern. (Blue colored layer) was formed.

(Formation of protective layer)
Thereafter, the above-mentioned curable resin composition was applied as a protective layer by spin coating and dried to form an applied film (applied thickness: 2.0 μm). A photomask was arranged at a distance of 100 μm from the coating film of the curable resin composition, and only the region where the protective film was formed was irradiated with a proximity liner for 10 seconds using a 2.0 kW ultra-high pressure mercury lamp. Next, the film was immersed in a 0.05 wt% aqueous solution of potassium hydroxide (liquid temperature: 23 ° C.) for 1 minute to perform alkali development, thereby removing only the uncured portion of the coating film of the curable resin composition. Thereafter, the substrate was left in an atmosphere at 230 ° C. for 30 minutes to perform a heat treatment to form a protective layer.

  Through the above steps, a color filter member was manufactured.

(Formation of touch panel member)
According to the following procedure, a touch panel member was formed on the surface of the support member opposite to the color filter member side.

(Formation of the first electrode)
A transparent conductor film having a thickness of 0.14 μm is formed on the surface of the support member opposite to the color filter member side by a sputtering method, and thereafter, the transparent conductor film is etched using the resist pattern as a mask, A first electrode having a pattern was formed. ITO (Indium Tin Oxide; indium tin oxide) was used as the transparent conductor film.

(Formation of the first insulating layer)
The above-mentioned curable resin composition was applied on a supporting member by spin coating so as to cover the obtained first electrode, and dried to form an applied film (applied thickness: 2.0 μm). The detailed conditions are the same as the conditions for forming the protective layer of the color filter.

(Formation of the second electrode)
Next, a 0.14 μm-thick transparent conductor film was formed on the obtained first insulating layer by a sputtering method, and then the transparent conductor film was etched using the resist pattern as a mask. Thus, a second electrode having a predetermined pattern was formed.

(Formation of second insulating layer)
Thereafter, the above-mentioned curable resin composition was applied by spin coating to cover the obtained second electrode, and dried to form a coating film (application thickness: 2.0 μm). The detailed conditions are the same as the conditions for forming the protective layer of the color filter.

  By the above procedure, a touch panel member was obtained.

(Production of First Optical Function Member)
According to the following procedure, a first optical functional member in which an alignment layer and a retardation layer (liquid crystal layer) were laminated in this order on the surface of the color filter member opposite to the support member side was manufactured.

(Formation of alignment layer)
The alignment layer was coated with a photo-alignment film material (solid content: 4.5%) manufactured by JSR Corporation so as to have a thickness of 0.2 μm, dried at 120 ° C. for 1 minute, and then subjected to 30 mJ with a polarization exposure apparatus. / Cm ² and irradiated with polarized ultraviolet light. The angle of the polarization exposure apparatus was adjusted so that the angle between the optical axis of the polarizing plate installed on the liquid crystal panel and the optical axis of the retardation layer was 45 degrees.

(Formation of retardation layer)
A polymerizable rod-like liquid crystal material is applied to the retardation layer, and a compound obtained by mixing rod-like compounds of the following chemical formulas (1) and (2) at a mixing ratio of 1: 1, and an initiator, BASF Japan Co., Ltd. Irgacure, are used. 907 and Megafac (F477) manufactured by DIC Corporation were dissolved in a 1: 1 mixed solvent of methyl ethyl ketone and methyl isobutyl ketone to prepare a 25% by mass solution and applied. The solution was applied with a spin coater, dried at 90 ° C. for 1 minute, and then exposed at an exposure amount of 500 mJ / cm ² and an exposure wavelength of 365 nm to form a retardation layer. The front phase difference Re (nm) is changed by the influence of the process performed after the formation of the phase difference layer, particularly by heating or the like. The front phase difference value was adjusted. Specifically, the amount of change in the retardation after the formation of the retardation layer was measured in advance, and the value of the front phase difference after the formation of the retardation layer was a value that allows for the amount of change.

(Formation of protective layer)
Thereafter, the above-mentioned curable resin composition was applied as a protective layer by spin coating and dried to form an applied film (applied thickness: 2.0 μm). The detailed conditions are the same as those of the above-described color filter protective layer.

(Preparation of second optical function member)
According to the following procedure, a second optical functional member in which an alignment layer and a retardation layer (liquid crystal layer) were laminated in this order on the surface of the touch panel member opposite to the support member side was manufactured.

(Formation of alignment layer)
The alignment layer was coated with a photo-alignment film material (solid content: 4.5%) manufactured by JSR Corporation so as to have a thickness of 0.2 μm, dried at 120 ° C. for 1 minute, and then subjected to 30 mJ with a polarization exposure apparatus. / Cm ² and irradiated with polarized ultraviolet light. The angle of the polarization exposure apparatus was adjusted so that the angle formed by the optical axis of the phase difference layer on the color filter surface side was 90 degrees.

(Formation of retardation layer)
A polymerizable rod-shaped liquid crystal material is applied to the retardation layer, and a compound obtained by mixing the rod-shaped compounds of the above-described chemical formulas (1) and (2) at a mixing ratio of 1: 1 and an initiator, BASF Japan Co., Ltd. Irgacure, are used. 907 and Megafac (F477) manufactured by DIC Corporation were dissolved in a 1: 1 mixed solvent of methyl ethyl ketone and methyl isobutyl ketone to prepare a 25% by mass solution and applied. The solution was applied with a spin coater, dried at 90 ° C. for 1 minute, and then exposed at an exposure amount of 500 mJ / cm ² and an exposure wavelength of 365 nm to form a retardation layer. The front phase difference Re (nm) is changed by the influence of the process performed after the formation of the phase difference layer, particularly by heating or the like, so that after all the steps are completed, the front phase difference Re (nm) becomes λ / 4 at a wavelength of 550 nm. The front phase difference value was adjusted. Specifically, the amount of change in the retardation after the formation of the retardation layer was measured in advance, and the value of the front phase difference after the formation of the retardation layer was a value that allows for the amount of change.

(Formation of protective layer)
Thereafter, the above-mentioned curable resin composition was applied as a protective layer by spin coating and dried to form an applied film (applied thickness: 2.0 μm). The detailed conditions are the same as those of the above-described color filter protective layer. Through the above procedure, a color filter substrate was obtained.

[Comparative Example 1]
A color filter substrate having a color filter member, a support member, and a touch panel member laminated in this order was obtained in the same manner as in Example 1, except that the first optical function member and the second optical function member were not formed. .

[Example 2]
A color filter substrate was obtained in the same manner as in Example 1, except that the formation position of the touch panel member was a position between the support member and the color filter member.

[Comparative Example 2]
A color filter substrate was obtained in the same manner as in Example 2, except that the first optical function member and the second optical function member were not formed.

[Example 3]
A color filter substrate was obtained in the same manner as in Example 1, except that the formation position of the touch panel member was set to the surface on the colored layer side of the color filter member.

[Comparative Example 3]
A color filter substrate was obtained in the same manner as in Example 3, except that the first optical function member and the second optical function member were not formed.

[Evaluation]
(Production of liquid crystal panel for evaluation)
A columnar spacer (spacer member) was formed on the surface of the obtained color filter substrate on the side of the first optical function member by the following procedure. The curable resin composition described above was applied onto the light-shielding layer by a spin coating method and dried to form a coating film. A photomask was arranged at a distance of 100 μm from the coating film of the curable resin composition, and only a region where the columnar spacer was formed was irradiated with ultraviolet light for 10 seconds using a 2.0 kW ultra-high pressure mercury lamp by a proximity liner. Next, the film was immersed in a 0.05 wt% aqueous solution of potassium hydroxide (liquid temperature: 23 ° C.) for 1 minute to perform alkali development, thereby removing only the uncured portion of the coating film of the curable resin composition. Thereafter, the substrate was left in an atmosphere at 230 ° C. for 30 minutes to perform a heat treatment to form a columnar spacer so as to have a predetermined number density.

  Next, a TFT substrate was prepared as a counter substrate. An alignment layer was formed on the color filter substrate on which the columnar spacers were formed and the TFT substrate in order to align the driving liquid crystal. After bonding the TFT substrate and the color filter substrate, driving liquid crystal was injected between the color filter substrate and the TFT substrate, and polarizing plates were bonded to the front and back of the panel in a crossed Nicols relationship. The optical axis of the polarizing plate and the optical axis of the phase difference layer of the color filter substrate were set to 45 degrees. A low-reflection film was bonded to the outermost surface on the manside side of the liquid crystal panel. Thus, a liquid crystal panel for evaluation was obtained.

(Reflectance measurement)
The reflectance on the man side of the manufactured liquid crystal panel was measured. Konica Minolta CM-2500d was used as a measuring device. Table 1 shows the measurement results.

(Visual evaluation)
In addition, when images and text information were displayed on the manufactured liquid crystal panel and observed in an outdoor bright environment (about 20,000 lux), in Examples 1, 2, and 3, the display contents could be clearly recognized. Was. On the other hand, in Comparative Examples 1, 2, and 3, since external light was reflected by the panel and the display surface appeared bright, it was difficult to visually recognize the display contents. Table 1 shows the results. In Table 1, "O" indicates that the display content was clearly visible, and "X" indicates that it was difficult to visually recognize the display content.
In Comparative Examples 1 and 2, the external shape of the sensor electrode layer in plan view was partially confirmed. On the other hand, in Examples 1 and 2, the external shape in plan view of the sensor electrode layer was not confirmed.
In Comparative Example 3, it was confirmed that the display surface was partially reflected. In contrast, in Example 3, partial reflection on the display surface was not confirmed.

11A, 1B ... Optical functional member 11, 11A, 11B ... Retardation layer 12, 12A, 12B ... Alignment layer 2 ... Support member 3 ... Color filter member 4 ... Touch panel member 10 ... Color filter substrate 20 ... Counter substrate 30 ... Liquid crystal layer Reference numeral 60: laminated body 61: laminated member 100A: liquid crystal panel 100: liquid crystal display

Claims (7)

Two optical functional members,
A support member disposed between the two optical function members,
A color filter member disposed between the two optical function members,
A color filter substrate, wherein the optical function member has a retardation layer containing a liquid crystal material,
Further comprising a touch panel member having a sensor electrode layer arranged in a pattern,
The color filter substrate, wherein the touch panel member is disposed between the two optical function members.   2. The color filter substrate according to claim 1, wherein the retardation layers of the two optical function members have the same wavelength dispersion and heat change characteristics of retardation values. 3.   The color filter substrate according to claim 1, wherein the retardation layers of the two optical function members have the same liquid crystal material.   Both of the two optical function members are a laminate of the support member, the fixing layer and the retardation layer directly disposed on the color filter member or the touch panel member, and the fixing layer is an alignment layer or an adhesive layer. The color filter substrate according to any one of claims 1 to 3, wherein   The color filter substrate according to any one of claims 1 to 4, wherein the touch panel member is a capacitive touch panel member.   A liquid crystal panel, comprising: the color filter substrate according to claim 1, a counter substrate, and a liquid crystal layer disposed between the color filter substrate and the counter substrate. A liquid crystal display device. A laminate used for the liquid crystal display device according to claim 6,
A laminate member having the support member, the color filter member, and the touch panel member having the sensor electrode layer arranged in a pattern,
A laminated body comprising: the optical function member disposed on one surface side of the laminated member.