JP6880582B2 - Front protective plate for display device and display device - Google Patents

Description

The present invention relates to a front protective plate for a display device and a display device including the front protective plate.

Generally, on the front side (exhaust side of display light, observer side) of a display device such as a liquid crystal display device, a plasma display panel, an organic EL display device, or electronic paper, a front surface protection for the display device for protecting the display device is provided. A board is provided. Such a front protective plate for a display device preferably has a decorative layer that hides wiring, connectors, etc. arranged on the outer peripheral portion of the display area of the display device so as not to spoil the appearance. It is used (for example, Patent Document 1).
As such a decorative layer, a layer having a black color is often used in order to secure a light-shielding property. However, in order to enhance the commercial value such as design, colors other than black are required, and recently, many of them exhibit white color (for example, Patent Documents 2 and 3).

Japanese Unexamined Patent Publication No. 2014-52775 Japanese Unexamined Patent Publication No. 2015-14733 Japanese Unexamined Patent Publication No. 2015-25966

Conventionally, a glass substrate has been mainly used as a translucent substrate constituting the front protective plate for a display device as described above, but in order to make it easier to bend, polyimide (PI) is used instead of the glass substrate. ) It is desired to use a flexible translucent substrate made of resin or the like.
However, when a polyimide (PI) resin substrate is used as a translucent substrate, light of a short wavelength is cut due to the characteristics of the material, so that the color of the display area of the front protective plate for the display device becomes yellowish. It will be.
Therefore, it has been proposed to provide a color adjusting layer for adjusting the color of the polyimide (PI) resin substrate on one surface of the polyimide (PI) resin substrate to obtain a desired color.

However, as shown in FIG. 11, a polyimide (PI) resin substrate is used as the translucent substrate 101, a color adjusting layer 102 is provided on the entire surface of one surface thereof, and a conventional decorative layer exhibiting white color is provided on the entire surface. In the display device front protective plate 100 formed of 103, although the color of the display area P100 can be a desired color, the color of the opaque area Q100 is such that the decorative layer 103 is the color adjustment layer 102. There was a problem that the white color became dark due to the influence of the color.

11A and 11B are views showing an example of a conventional front protective plate for a display device, where FIG. 11A is a schematic plan view and FIG. 11B is a schematic cross-sectional view taken along the line FF of FIG. 11A.
Further, although omitted in FIG. 11, a light-shielding layer for supplementing the light-shielding property is usually provided on the lower surface of the white decoration layer 103 (the side opposite to the color adjustment layer 102). Has been done. This is because, unlike the decorative layer exhibiting black color, the decorative layer exhibiting white color tends to have insufficient light-shielding property when the demand for thinning is met, and this lack of light-shielding property is compensated for.

The present invention has been made in view of the above circumstances, and by adjusting the colors of the display area and the opaque area, it is possible to make both the display area and the opaque area a desired color. It is an object of the present invention to provide a front protective plate for a device and a display device provided with the front protective plate for the display device.

That is, the invention according to claim 1 of the present invention is a front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light, and is transparent. On one surface of the sex substrate, the translucent substrate, a first color adjusting layer for adjusting the color of the translucent substrate, and a first decorative layer composed of a resin containing a white pigment. A second color adjusting layer for adjusting the color of the first decorative layer, and the first color adjusting layer is provided in the display area and the opaque area of the translucent substrate. The second color adjusting layer is provided on the first color adjusting layer provided in the opaque region of the translucent substrate, and the first decorative layer is provided. It is a front protective plate for a display device, which is provided on the second color adjusting layer.

The invention according to claim 2 of the present invention is the front protective plate for a display device according to claim 1, wherein the second color adjusting layer is made of a resin containing a red pigment. is there.

The invention according to claim 3 of the present invention is a front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light, and is transparent to light. It is composed of a sex substrate, a first color adjusting layer for adjusting the color of the translucent substrate, and a resin containing a white pigment and a second color adjusting pigment on one surface of the translucent substrate. A second decorative layer is provided, and the first color adjusting layer is provided in the display region and the opaque region of the translucent substrate, and the second decorative layer is provided. , A front protective plate for a display device, characterized in that it is provided on the first color adjusting layer provided in the opaque region of the translucent substrate.

The invention according to claim 4 of the present invention is for a display device according to claim 3, wherein the second decorative layer contains a red pigment as the second color adjusting pigment. It is a front protective plate.

The invention according to claim 5 of the present invention is a front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light, and is transparent to light. On one surface of the sex substrate, the translucent substrate, a first color adjusting layer for adjusting the color of the translucent substrate, and a first decorative layer composed of a resin containing a white pigment. A third color adjusting layer for adjusting the color of the first decorative layer, and the first color adjusting layer is provided in the display area of the translucent substrate and is opaque. The third color adjusting layer is provided in the opaque region of the translucent substrate, and the first decorative layer is the third color adjusting layer. It is a front protective plate for a display device, which is characterized by being provided on the top.

The invention according to claim 6 of the present invention is the front protective plate for a display device according to claim 5, wherein the third color adjusting layer is made of a resin containing a purple pigment. is there.

The invention according to claim 7 of the present invention is a front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light, and is transparent to light. It is composed of a sex substrate, a first color adjusting layer for adjusting the color of the translucent substrate, and a resin containing a white pigment and a third color adjusting pigment on one surface of the translucent substrate. The first color adjusting layer is provided in the display area of the translucent substrate, and is not provided in the opaque area, and the third color adjusting layer is provided. The decorative layer is provided in the opaque region of the translucent substrate, and is a front protective plate for a display device.

The invention according to claim 8 of the present invention is for the display device according to claim 7, wherein the third decorative layer contains a purple pigment as the third color adjusting pigment. It is a front protective plate.

The invention according to claim 9 of the present invention is a front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light, and is transparent to light. On one surface of the sex substrate, the translucent substrate, a first color adjusting layer for adjusting the color of the translucent substrate, and a first decorative layer composed of a resin containing a white pigment. The first color adjusting layer is provided in the display area of the translucent substrate and is not provided in the opaque area, and the first decorative layer is the transparent layer. A front protective plate for a display device, characterized in that it is provided in the opaque region of an optical substrate.

Further, the invention according to claim 10 of the present invention includes the display device front protective plate and the display panel according to any one of claims 1 to 9, and the display device front protective plate is provided. The display device is characterized in that the surface of the translucent substrate on the side where the first color adjusting layer is provided is arranged so as to face the display panel.

According to the present invention, it is possible to provide a front protective plate for a display device capable of setting both a display area and an opaque region to a desired color, and a display device provided with the front protective plate for the display device. it can.

The figure which shows an example of the 1st Embodiment of the front surface protection plate for a display device which concerns on this invention. The figure which shows an example of the 2nd Embodiment of the front surface protection plate for a display device which concerns on this invention. The figure which shows an example of the 3rd Embodiment of the front surface protection plate for a display device which concerns on this invention. The figure which shows an example of the 4th Embodiment of the front surface protection plate for a display device which concerns on this invention. The figure which shows an example of the 5th Embodiment of the front surface protection plate for a display device which concerns on this invention. The figure which shows an example of the display device which concerns on this invention. The figure which shows an example of the 1st Embodiment of the display device which concerns on this invention. The figure which shows an example of the 2nd Embodiment of the display device which concerns on this invention. The figure which shows an example of the 3rd Embodiment of the display device which concerns on this invention. L ^* a ^* b ^* A diagram showing the definition range of white of the present invention in the color scheme chromaticity diagram. The figure which shows an example of the front protection plate for a conventional display device.

<Front protective plate for display device>
First, the front protective plate for a display device according to the present invention will be described.
The configurations in each of the following embodiments (for example, the translucent substrate, the first to third color adjusting layers, and the first to third decorative layers) describe the minimum necessary configurations in each embodiment. Therefore, the front protective plate for a display device according to the present invention may have a configuration other than these (for example, a transparent electrode or the like) as appropriate.

(First Embodiment)
First, a first embodiment of the front protective plate for a display device according to the present invention will be described.
FIG. 1 is a diagram showing an example of a first embodiment of a front protective plate for a display device according to the present invention. Here, (a) is a schematic plan view, and (b) is a schematic cross-sectional view taken along the line AA of (a).

As shown in FIG. 1A, the display device front protective plate 1 has a display area P1 and has an opaque area Q1 that shields visible light on the outer peripheral portion of the display area P1.
The display area P1 is an area in which when the display device front protective plate 1 is arranged on the display device, the contents displayed by the display device can be displayed through the display device front protective plate 1.
On the other hand, the opaque region Q1 hides the wiring, the connector, etc. arranged on the outer peripheral portion of the display region P1 when the front protective plate 1 for the display device is arranged on the display device so as not to spoil the appearance. Area for. Further, the opaque region Q1 is an region that also serves as a decorative portion by visible information such as colors and patterns expressed by the opaque region Q1 and logos and marks provided as appropriate. Although not shown, the opaque region Q1 may be provided with a region that transmits infrared rays.

Further, as shown in FIG. 1B, the display device front protective plate 1 adjusts the color of the translucent substrate 11 on one surface of the translucent substrate 11 and the translucent substrate 11. It has a first color adjusting layer 12, a first decorative layer 14 made of a resin containing a white pigment, and a second color adjusting layer 13 for adjusting the color of the first decorative layer 14. The first color adjusting layer 12 is provided in the display region P1 and the opaque region Q1 of the translucent substrate 11, and the second color adjusting layer 13 is provided in the opaque region of the translucent substrate 11. It is provided on the first color adjusting layer 12 provided in Q1, and the first decorative layer 14 is provided on the second color adjusting layer 13.

Here, although omitted in FIG. 1B, the light-shielding property is supplemented on the lower surface of the first decorative layer 14 (the side opposite to the second color adjusting layer 13). A light-shielding layer may be provided. This is because, unlike the decorative layer exhibiting black color, the decorative layer exhibiting white color tends to have insufficient light-shielding property when the demand for thinning is met, and this lack of light-shielding property is compensated for.

As the light-shielding layer, for example, one composed of a resin containing a black pigment can be used.
For this black pigment, for example, titanium black (low-order titanium oxide, titanium oxynitride, etc.), carbon black, or the like can be used.
The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like.

When the front protective plate 1 for the display device is arranged on the display device, the display panel or the like of the display device is arranged on the lower side (opposite side of the translucent substrate 11) of the first decorative layer 14. , The display light of the display device is emitted from the lower side of the first decorative layer 14 toward the upper side of the translucent substrate 11. In other words, the side of the translucent substrate 11 is the observer side.

In this way, the display device front protective plate 1 can adjust the color of the translucent substrate 11 by the first color adjusting layer 12 in the display region P1, and the translucent substrate 1 in the opaque region Q1. By providing the first color adjusting layer 12 and the second color adjusting layer 13 between the sex substrate 11 and the first decorative layer 14, the first color adjusting layer 12 and the second color adjusting layer 13 seen by the observer from above the translucent substrate 11 can be seen. The color of the decorative layer 14 can be adjusted to a desired white color.
Therefore, in the front protective plate 1 for the display device, the display area P1 and the opaque area Q1 are used even when a flexible translucent substrate made of polyimide (PI) resin or the like is used instead of the glass substrate. Both can be the desired color.

(About white)
In the present invention, the term "white" includes not only literal white but also white having a slight tint. The ideal white color is a color having a reflectance of 100% and no hue at all, but is a difficult color in reality. Therefore, in the present invention, "white" is defined as follows.
That is, in the present invention, "white" means lightness L ^* , chromaticity a ^*, and chromaticity b ^{* in the L *} a ^* b ^* color system according to JIS Z 8729.
The brightness L ^* is L ^* ≧ 80, preferably L ^* ≧ 90, more preferably L ^* ≧ 95,
The chromaticity a ^* is -0.5 ≤ a ^* ≤ 0.5, and the chromaticity b ^* is -0.5 ≤ b ^* ≤ 0.5.
Is defined as the color that indicates.

Regarding the lightness, if the chromaticity a ^* and the chromaticity b ^* are within the above ranges, a low lightness may be required depending on the required white color design. Therefore, the higher the lightness is, the higher the lightness is. It cannot be said that it is good, but in the sense that it is whiter, it is better to have high brightness.

L ^* is an index of lightness, and ^{both a *} and b ^* are indexes related to both hue and saturation. FIG. 10 shows an L ^* a ^* b ^* color system chromaticity diagram having ^{chromaticity a *} and chromaticity b ^* representing the hue and saturation as coordinate axes. In the figure, the negative direction on the left side of the drawing of ^{a *} is the green direction, the positive direction on the right side of the drawing of ^{a *} is the red direction, the negative direction on the lower side of the drawing of ^{b * is the blue direction, and b *} The positive direction on the upper side of the drawing is the yellow direction. The direction perpendicular to the paper surface is the coordinate axis of ^{brightness L *.} In the figure, the domain of white in the present invention is shown by a dotted quadrangle.

Hereinafter, each member constituting the front protective plate 1 for the display device will be described.

(Translucent substrate 11)
The translucent substrate 11 is a flexible member and is a member that supports the first decorative layer 14.

Here, "translucency" means transparency to the extent that an observer of a display device provided with a front protective plate 1 for a display device does not interfere with visibility from the display area P1 unless otherwise specified. It means that you are doing it. Therefore, this "translucency" includes colorless transparency and colored transparency to the extent that it does not interfere with visibility, and is not defined by a strict transmittance, and is transparent depending on the application of the front protective plate 1 for a display device and the like. The degree of lightness can be determined.

The translucent substrate 11 is not particularly limited as long as it is a flexible member. Here, the flexibility can be confirmed by performing a bending resistance test. For example, it can be confirmed by measuring under the conditions of a bending radius R = 3 mm, a rotation speed of 120 rpm / min, and a stroke of 20 mm using a DLDMLLH-FU planar U-shaped repeating tester manufactured by Yuasa System Co., Ltd.

The material constituting the translucent substrate 11 is preferably a material that can impart a predetermined flexibility. For example, polyester resins such as polyimide (PI), polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), acrylic resins, polycarbonate resins, cycloolefin resins and the like can be mentioned. Further, depending on the thickness, a glass base material can also be used. From the viewpoint of flexibility, heat resistance and the like, it is preferable to use polyimide (PI).

The thickness of the translucent substrate 11 is preferably a thickness having a predetermined flexibility and a rigidity sufficient to function as a front protective plate for a display device. The specific thickness of the translucent substrate 11 is preferably in the range of 20 μm to 100 μm, particularly preferably in the range of 20 μm to 85 μm, and particularly preferably in the range of 30 μm to 60 μm.

As the translucent substrate 11, a commercially available one may be prepared, but for example, a predetermined resin composition may be applied onto a glass substrate to form a desired transparent substrate. Examples of the coating method for applying the resin composition onto the glass substrate include known methods such as a spin coating method, a roll coating method, a die coating method, a spray coating method, and a bead coating method.

(First color adjustment layer 12)
The first color adjusting layer 12 is a member that adjusts the color of the translucent substrate 11 in the display area P1 of the display device front protective plate 1 to a desired transparent color, which is visually recognized by the observer.
For example, as described above, when polyimide (PI) is used as a material constituting the translucent substrate 11, short-wavelength light is cut due to the characteristics of the material, so that the color of the display region P1 is yellow. It depends on the taste.
Therefore, a first color adjusting layer 12 is provided on one surface of the translucent substrate 11, and the color in the display region P1 of the translucent substrate 11 visually recognized by the observer is a desired transparent color. Adjust to.

As a material constituting the first color adjusting layer 12, a resin containing a blue pigment can be used.
For this blue pigment, for example, a blue pigment such as copper phthalocyanine type or anthraquinone type can be used.
The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like. When a curable resin is used, the first color adjusting layer 12 is formed as a layer made of a cured product of the curable resin.

The thickness of the first color adjusting layer 12 is preferably a thickness within a range in which the color adjustment as described above is possible and does not impair the flexibility of the translucent substrate 11.
The thickness of the first color adjusting layer 12 may be, for example, in the range of 0.1 μm to 2.0 μm, preferably 0.2 μm to 1.0 μm, and more preferably 0.3 μm to 0.8 μm. it can.

The first color adjusting layer 12 can be formed by applying a predetermined resin composition on, for example, a translucent substrate 11. Examples of the coating method for applying the resin composition onto the translucent substrate 11 include known methods such as a spin coating method, a roll coating method, a die coating method, a spray coating method, and a bead coating method.

(Second color adjustment layer 13)
The second color adjusting layer 13 is a front protective plate 1 for a display device, which is visible to the observer via the translucent substrate 11, the first color adjusting layer 12, and the second color adjusting layer 13. This is a member that adjusts the color of the first decorative layer 14 in the opaque region Q1 to a desired white color.

As a material constituting the second color adjusting layer 13, a resin containing a red pigment can be used.
As this red pigment, for example, a red pigment such as diketopyrrolopyrrole-based, anthraquinone-based, or perylene-based can be used. For example, CI Pigment Red 177 and the like can be preferably used.

The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like. When a curable resin is used, the second color adjusting layer 13 is formed as a layer made of a cured product of the curable resin.
As the curable resin, a photosensitive resin that can be cured by active energy rays such as ultraviolet rays, electron beams, and visible rays can be used. By using a photosensitive resin, it can be formed by a photolithography method capable of forming a fine pattern.
Moreover, you may use a thermosetting resin as a curable resin. By using a thermosetting resin, the second color adjusting layer 13 can be formed by a printing method.

The thickness of the second color adjusting layer 13 is preferably a thickness within a range in which the color adjustment as described above is possible and does not impair the flexibility of the translucent substrate 11.
The thickness of the second color adjusting layer 13 may be, for example, in the range of 0.2 μm to 3.0 μm, preferably 0.3 μm to 1.0 μm, and more preferably 0.4 μm to 0.8 μm. it can.

The second color adjusting layer 13 is, for example, by using a photosensitive resin as a material as described above, at a desired position on the first color adjusting layer 12 by a photolithography method, in a desired form. Can be formed. Further, the second color adjusting layer 13 may be formed at a desired position on the first color adjusting layer 12 by a printing method using a thermosetting resin as a material.

(First decorative layer 14)
The first decorative layer 14 is a member that hides the wiring, the connector, and the like arranged on the outer peripheral portion of the display area of the display device provided with the front protective plate 1 for the display device so as not to spoil the appearance. Therefore, it exhibits white color via the translucent substrate 11, the first color adjusting layer 12, and the second color adjusting layer 13.

As a material constituting the first decorative layer 14, a resin containing a white pigment can be used.
For this white pigment, for example, titanium oxide, silica, talc, kaolin, clay, barium sulfate, calcium hydroxide, etc. can be used.

The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like. When a curable resin is used, the first decorative layer 14 is formed as a layer made of a cured product of the curable resin.
As the curable resin, for example, a photosensitive resin that can be cured by active energy rays such as ultraviolet rays, electron beams, and visible rays can be used. By using a photosensitive resin, it can be formed by a photolithography method capable of forming a fine pattern.
Moreover, you may use a thermosetting resin as a curable resin. By using a thermosetting resin, the first decorative layer 14 can be formed by a printing method.

The thickness of the first decorative layer 14 is a range that exhibits a desired white color when the front protective plate 1 for a display device is configured, and is a thickness that does not impair the flexibility of the translucent substrate 11. preferable.
The thickness of the first decorative layer 14 may be, for example, in the range of 5.0 μm to 30.0 μm, preferably 7.0 μm to 25.0 μm, and more preferably 8.0 μm to 22.0 μm. it can.

The first decorative layer 14 can be formed on the second color adjusting layer 13 by a photolithography method by using a photosensitive resin as a material, for example, as described above.
Further, the first decorative layer 14 may be formed on the second color adjusting layer 13 by a printing method using a thermosetting resin as a material.

(Second embodiment)
Next, a second embodiment of the front protective plate for a display device according to the present invention will be described.
FIG. 2 is a diagram showing an example of a second embodiment of the front protective plate for a display device according to the present invention. Here, (a) is a schematic plan view, and (b) is a schematic cross-sectional view taken along the line BB of (a).

As shown in FIG. 2A, the display device front protective plate 2 has a display area P2, and an opaque area Q2 that shields visible light is provided on the outer peripheral portion of the display area P2.
The functions of the display area P2 and the opaque area Q2 of the front protective plate 2 for the display device are the same as the functions of the display area P1 and the opaque area Q1 of the front protective plate 1 for the display device in the first embodiment described above. Therefore, the detailed description thereof will be omitted.

Further, as shown in FIG. 2B, the display device front protective plate 2 adjusts the color of the translucent substrate 21 on one surface of the translucent substrate 21 and the translucent substrate 21. It has a first color adjusting layer 22 and a second decorative layer 23 composed of a white pigment and a resin containing a second color adjusting pigment, and the first color adjusting layer 22 is transparent. A second decorative layer 23 is provided on the display region P2 and the opaque region Q2 of the sex substrate 21 and is provided on the first color adjustment layer 22 provided in the opaque region Q2 of the translucent substrate 11. It is provided.

Here, although omitted in FIG. 2B, the lower side (first color) of the second decorative layer 23 is the same as the front protective plate 1 for the display device in the first embodiment described above. A light-shielding layer may be provided on the surface of the adjustment layer 22) to supplement the light-shielding property.

When the front protective plate 2 for the display device is arranged on the display device, the display panel or the like of the display device is arranged on the lower side (opposite side of the translucent substrate 21) of the second decorative layer 23. , The display light of the display device is emitted from the lower side of the second decorative layer 23 toward the upper side of the translucent substrate 21.

In this way, the display device front protective plate 2 can adjust the color of the translucent substrate 21 by the first color adjusting layer 22 in the display region P2, and the translucent substrate 2 in the opaque region Q2. The color of the second decorative layer 23 seen by the observer through the sex substrate 21 and the first color adjusting layer 22 is desired by the second color adjusting pigment contained in the second decorative layer 23. It can be adjusted to white.
Therefore, in the front protective plate 2 for the display device, the display area P2 and the opaque area Q2 are used even when a flexible translucent substrate made of polyimide (PI) resin or the like is used instead of the glass substrate. Both can be the desired color.

Hereinafter, each member constituting the front protective plate 2 for the display device will be described.
Items that overlap with each member constituting the front protective plate 1 for the display device will be omitted as appropriate.

(Translucent substrate 21)
The translucent substrate 21 is a flexible member and is a member that supports the second decorative layer 23.
The translucent substrate 21 may be the same as the translucent substrate 11 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(First color adjustment layer 22)
The first color adjusting layer 22 is a member that adjusts the color of the translucent substrate 21 in the display area P2 of the display device front protective plate 2 to a desired transparent color, which is visually recognized by the observer.
The first color adjusting layer 22 may be the same as the first color adjusting layer 12 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(Second decorative layer 23)
The second decorative layer 23 is a member that hides the wiring, the connector, and the like arranged on the outer peripheral portion of the display area of the display device provided with the front protective plate 2 for the display device so as not to spoil the appearance. It is composed of a resin containing a white pigment and a second color adjusting pigment, and exhibits white color via a translucent substrate 21 and a first color adjusting layer 22.

As the white pigment contained in the second decorative layer 23, for example, titanium oxide, silica, talc, kaolin, clay, barium sulfate, calcium hydroxide, or the like can be used.
Further, a red pigment can be used as the second color adjusting pigment contained in the second decorative layer 23. As this red pigment, for example, a red pigment such as diketopyrrolopyrrole-based, anthraquinone-based, or perylene-based can be used. For example, CI Pigment Red 177 and the like can be preferably used.

The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like.
As the curable resin, for example, a photosensitive resin that can be cured by active energy rays such as ultraviolet rays, electron beams, and visible rays can be used. By using a photosensitive resin, it can be formed by a photolithography method capable of forming a fine pattern.
Moreover, you may use a thermosetting resin as a curable resin. By using a thermosetting resin, the second decorative layer 23 can be formed by a printing method.

The thickness of the second decorative layer 23 is a range that exhibits a desired white color when the front protective plate 2 for a display device is configured, and is a thickness that does not impair the flexibility of the translucent substrate 21. preferable.
The thickness of the second decorative layer 23 may be, for example, in the range of 5.0 μm to 30.0 μm, preferably 7.0 μm to 25.0 μm, and more preferably 8.0 μm to 22.0 μm. it can.

The second decorative layer 23 can be formed at a desired position on the first color adjusting layer 22 by a photolithography method, for example, by using a photosensitive resin as a material as described above. .. Further, the second decorative layer 23 may be formed on the first color adjusting layer 22 by a printing method using a thermosetting resin as a material.

(Third Embodiment)
Next, a third embodiment of the front protective plate for a display device according to the present invention will be described.
FIG. 3 is a diagram showing an example of a third embodiment of the front protective plate for a display device according to the present invention. Here, (a) is a schematic plan view, and (b) is a schematic cross-sectional view taken along the line CC of (a).

As shown in FIG. 3A, the display device front protective plate 3 has a display area P3, and an opaque area Q3 that shields visible light is provided on the outer peripheral portion of the display area P3.
The functions of the display area P3 and the opaque area Q3 of the front protective plate 3 for the display device are the same as the functions of the display area P1 and the opaque area Q1 of the front protective plate 1 for the display device in the first embodiment. Therefore, the detailed description thereof will be omitted.

Further, as shown in FIG. 3B, the display device front protective plate 3 adjusts the color of the translucent substrate 31 on one surface of the translucent substrate 31 and the translucent substrate 31. It has a first color adjusting layer 32, a first decorative layer 34 made of a resin containing a white pigment, and a third color adjusting layer 33 for adjusting the color of the first decorative layer 34. However, the first color adjusting layer 32 is provided in the display area P3 of the translucent substrate 31 and not in the opaque region Q3, and the third color adjusting layer 33 is provided in the translucent substrate 31. The first decorative layer 34 is provided on the third color adjusting layer 33.

Here, although omitted in FIG. 3B, the lower side (third color) of the first decorative layer 34 is the same as the front protective plate 1 for the display device in the first embodiment described above. A light-shielding layer for supplementing the light-shielding property may be provided on the surface of the adjustment layer 33).

When the front protective plate 3 for the display device is arranged on the display device, the display panel or the like of the display device is arranged on the lower side (opposite side of the translucent substrate 31) of the first decorative layer 34. , The display light of the display device is emitted from the lower side of the first decorative layer 34 toward the upper side of the translucent substrate 21.

In this way, the display device front protective plate 3 can adjust the color of the translucent substrate 31 by the first color adjusting layer 32 in the display region P3, and the translucent substrate 3 in the opaque region Q3. By providing the third color adjusting layer 33 between the sex substrate 31 and the first decorative layer 34, the color of the first decorative layer 34 seen by the observer from above the translucent substrate 11 can be displayed. It can be adjusted to the desired white color.

Hereinafter, each member constituting the front protective plate 3 for the display device will be described.
Items that overlap with the members constituting the front protective plates 1 and 2 for the display device will be omitted as appropriate.

(Translucent substrate 31)
The translucent substrate 31 is a flexible member and is a member that supports the first decorative layer 34.
The translucent substrate 31 may be the same as the translucent substrate 11 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(First color adjustment layer 32)
The first color adjusting layer 32 is a member that adjusts the color of the translucent substrate 31 in the display area P3 of the display device front protective plate 3 to a desired transparent color, which is visually recognized by the observer.
The first color adjusting layer 32 may be the same as the first color adjusting layer 12 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(First decorative layer 34)
The first decorative layer 34 is a member that hides the wiring, the connector, and the like arranged on the outer peripheral portion of the display area of the display device provided with the front protective plate 1 for the display device so as not to spoil the appearance. Therefore, it exhibits white color via the translucent substrate 31 and the third color adjusting layer 33.
The first decorative layer 34 may be the same as the first decorative layer 14 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(Third color adjustment layer 33)
The third color adjusting layer 33 is a first decorative layer in the opaque region Q1 of the front protective plate 3 for a display device, which is visible to the observer via the translucent substrate 31 and the third color adjusting layer 33. A member that adjusts the color of 34 to a desired white color.

As a material constituting the third color adjusting layer 33, a resin containing a purple pigment can be used. For this purple pigment, for example, a quinacridone-based purple pigment can be used. For example, CI Pigment Violet 23 and the like can be preferably used.

The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like.
As the curable resin, a photosensitive resin that can be cured by active energy rays such as ultraviolet rays, electron beams, and visible rays can be used. By using a photosensitive resin, it can be formed by a photolithography method capable of forming a fine pattern.
Moreover, you may use a thermosetting resin as a curable resin. By using a thermosetting resin, the third color adjusting layer 33 can be formed by a printing method.

The thickness of the third color adjusting layer 33 is preferably a thickness within a range in which the color adjustment as described above is possible and does not impair the flexibility of the translucent substrate 31.
The thickness of the third color adjusting layer 33 may be, for example, in the range of 0.2 μm to 3.0 μm, preferably 0.3 μm to 1.0 μm, and more preferably 0.4 μm to 0.8 μm. it can.

The third color adjusting layer 33 is formed in a desired form at a desired position on the translucent substrate 31 by a photolithography method, for example, by using a photosensitive resin as a material as described above. be able to. Further, the third color adjusting layer 33 may be formed at a desired position on the translucent substrate 31 by a printing method using a thermosetting resin as a material.

(Fourth Embodiment)
Next, a fourth embodiment of the front protective plate for a display device according to the present invention will be described.
FIG. 4 is a diagram showing an example of a fourth embodiment of the front protective plate for a display device according to the present invention. Here, (a) is a schematic plan view, and (b) is a schematic cross-sectional view taken along the line DD of (a).

As shown in FIG. 4A, the display device front protective plate 4 has a display area P4, and an opaque area Q4 that shields visible light is provided on the outer peripheral portion of the display area P4.
The functions of the display area P4 and the opaque area Q4 of the front protective plate 4 for the display device are the same as the functions of the display area P1 and the opaque area Q1 of the front protective plate 1 for the display device in the first embodiment described above. Therefore, the detailed description thereof will be omitted.

Further, as shown in FIG. 4B, the display device front protective plate 4 adjusts the color of the translucent substrate 41 on one surface of the translucent substrate 41 and the translucent substrate 41. The first color adjusting layer 42 has a first color adjusting layer 42 and a third decorative layer 43 composed of a resin containing a white pigment and a third color adjusting pigment, and the first color adjusting layer 42 transmits light. A third decorative layer 43 is provided in the opaque region Q2 of the translucent substrate 41, and is provided in the display region P4 of the sex substrate 41 and not in the opaque region Q4.

Here, although omitted in FIG. 4B, the lower side (translucent substrate) of the third decorative layer 43 is the same as the front protective plate 1 for the display device in the first embodiment described above. A light-shielding layer may be provided on the surface (opposite side of 41) to supplement the light-shielding property.

When the front protective plate 4 for the display device is arranged on the display device, the display panel or the like of the display device is arranged on the lower side (opposite side of the translucent substrate 41) of the third decorative layer 43. , The display light of the display device is emitted from the lower side of the third decorative layer 43 toward the upper side of the translucent substrate 41.

As described above, the display device front protective plate 4 adjusts the color of the translucent substrate 41 by the first color adjusting layer 42 in the display region P4, and the translucent substrate 41 in the opaque region Q4. The color of the third decorative layer 43 seen by the observer can be adjusted to a desired white color by the third color adjusting pigment contained in the third decorative layer 43.
Therefore, in the front protective plate 4 for the display device, the display area P4 and the opaque area Q4 are used even when a flexible translucent substrate made of polyimide (PI) resin or the like is used instead of the glass substrate. Both can be the desired color.

Hereinafter, each member constituting the front protective plate 4 for the display device will be described.
Items that overlap with each member constituting the front protective plates 1 to 3 for the display device will be omitted as appropriate.

(Translucent substrate 41)
The translucent substrate 41 is a flexible member and is a member that supports the third decorative layer 43.
The translucent substrate 41 may be the same as the translucent substrate 11 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(First color adjustment layer 42)
The first color adjusting layer 42 is a member that adjusts the color of the translucent substrate 41 in the display area P4 of the front protective plate 4 for a display device to a desired transparent color, which is visible to the observer.
The first color adjusting layer 42 may be the same as the first color adjusting layer 12 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(Third decorative layer 43)
The third decorative layer 43 is a member that hides the wiring, the connector, and the like arranged on the outer peripheral portion of the display area of the display device provided with the front protective plate 4 for the display device so as not to spoil the appearance. It is composed of a resin containing a white pigment and a third color adjusting pigment, and exhibits white color via a translucent substrate 41.

As the white pigment contained in the third decorative layer 43, for example, titanium oxide, silica, talc, kaolin, clay, barium sulfate, calcium hydroxide and the like can be used.
Further, a purple pigment can be used as the third color adjusting pigment contained in the third decorative layer 43. For this purple pigment, for example, a quinacridone-based purple pigment can be used. For example, CI Pigment Violet 23 and the like can be preferably used.

The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like.
As the curable resin, for example, a photosensitive resin that can be cured by active energy rays such as ultraviolet rays, electron beams, and visible rays can be used. By using a photosensitive resin, it can be formed by a photolithography method capable of forming a fine pattern.
Moreover, you may use a thermosetting resin as a curable resin. By using a thermosetting resin, the third decorative layer 43 can be formed by a printing method.

The thickness of the third decorative layer 43 is a range that exhibits a desired white color when the front protective plate 4 for a display device is configured, and is a thickness that does not impair the flexibility of the translucent substrate 41. preferable.
The thickness of the third decorative layer 43 may be, for example, in the range of 5.0 μm to 30.0 μm, preferably 7.0 μm to 25.0 μm, and more preferably 8.0 μm to 22.0 μm. it can.

The third decorative layer 43 can be formed at a desired position on the translucent substrate 41 by a photolithography method, for example, by using a photosensitive resin as a material as described above. Further, the third decorative layer 43 may be formed on the translucent substrate 41 by a printing method using a thermosetting resin as a material.

(Fifth Embodiment)
Next, a fifth embodiment of the front protective plate for a display device according to the present invention will be described.
FIG. 5 is a diagram showing an example of a fifth embodiment of the front protective plate for a display device according to the present invention. Here, (a) is a schematic plan view, and (b) is a schematic cross-sectional view taken along the line EE of (a).

As shown in FIG. 5A, the display device front protective plate 5 has a display area P5, and an opaque area Q5 that shields visible light is provided on the outer peripheral portion of the display area P5.
The functions of the display area P5 and the opaque area Q5 of the front protective plate 5 for the display device are the same as the functions of the display area P1 and the opaque area Q1 of the front protective plate 1 for the display device in the first embodiment. Therefore, the detailed description thereof will be omitted.

Further, as shown in FIG. 5B, the display device front protective plate 5 adjusts the color of the translucent substrate 51 on one surface of the translucent substrate 51 and the translucent substrate 51. It has a first color adjusting layer 52 and a first decorative layer 53 made of a resin containing a white pigment, and the first color adjusting layer 52 is a display region P5 of the translucent substrate 51. The first decorative layer 53 is provided in the opaque region Q5 of the translucent substrate 51.

Here, although omitted in FIG. 5B, the lower side (translucent substrate) of the first decorative layer 53 is the same as the front protective plate 1 for the display device in the first embodiment described above. A light-shielding layer may be provided on the surface (opposite side of 51) to supplement the light-shielding property.

When the front protective plate 5 for the display device is arranged on the display device, the display panel or the like of the display device is arranged on the lower side (the side opposite to the translucent substrate 51) of the first decorative layer 53. , The display light of the display device is emitted from the lower side of the first decorative layer 53 toward the upper side of the translucent substrate 51.

In this way, the display device front protective plate 5 can adjust the color of the translucent substrate 51 by the first color adjusting layer 52 in the display region P5, and the translucent substrate 5 can adjust the color in the opaque region Q3. By not providing the first color adjusting layer 52 between the sex substrate 51 and the first decorative layer 53, the first decorative layer 53 seen by the observer from above the translucent substrate 51 The color of can be adjusted to the desired white color.

Hereinafter, each member constituting the front protective plate 5 for the display device will be described.
Items that overlap with the members constituting the front protective plates 1 to 4 for the display device will be omitted as appropriate.

(Translucent substrate 51)
The translucent substrate 51 is a flexible member and is a member that supports the first decorative layer 53.
The translucent substrate 51 may be the same as the translucent substrate 11 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(First color adjustment layer 52)
The first color adjusting layer 52 is a member that adjusts the color of the translucent substrate 51 in the display area P5 of the display device front protective plate 5 to a desired transparent color, which is visually recognized by the observer.
The first color adjusting layer 52 may be the same as the first color adjusting layer 12 in the front protective plate 1 for the display device. Therefore, detailed description here will be omitted.

(First decorative layer 53)
The first decorative layer 53 is a member that hides the wiring, the connector, and the like arranged on the outer peripheral portion of the display area of the display device provided with the front protective plate 5 for the display device so as not to spoil the appearance. Therefore, it exhibits white color via the translucent substrate 51.

As a material constituting the first decorative layer 53, a resin containing a white pigment can be used.
For this white pigment, for example, titanium oxide, silica, talc, kaolin, clay, barium sulfate, calcium hydroxide, etc. can be used.

The resin is basically not particularly limited, but it is preferable to use a curable resin in terms of durability and the like. When a curable resin is used, the first decorative layer 53 is formed as a layer made of a cured product of the curable resin.
As the curable resin, for example, a photosensitive resin that can be cured by active energy rays such as ultraviolet rays, electron beams, and visible rays can be used. By using a photosensitive resin, it can be formed by a photolithography method capable of forming a fine pattern.
Moreover, you may use a thermosetting resin as a curable resin. By using a thermosetting resin, the first decorative layer 53 can be formed by a printing method.

The thickness of the first decorative layer 53 is a range that exhibits a desired white color when the front protective plate 5 for a display device is configured, and is a thickness that does not impair the flexibility of the translucent substrate 51. preferable.
The thickness of the first decorative layer 53 may be, for example, in the range of 5.0 μm to 30.0 μm, preferably 7.0 μm to 25.0 μm, and more preferably 8.0 μm to 22.0 μm. it can.

The first decorative layer 53 can be formed at a desired position on the translucent substrate 51 by a photolithography method, for example, by using a photosensitive resin as a material as described above.
Further, the first decorative layer 53 may be formed on the translucent substrate 51 by a printing method using a thermosetting resin as a material.

<Display device>
Next, the display device according to the present invention will be described.
The display device according to the present invention includes the front protective plate for the display device and the display panel according to the present invention, and the front protective plate for the display device is the first color adjustment of the translucent substrate. The surface on the side where the layer is provided is arranged so as to face the display panel.

FIG. 6 is a diagram showing an example of a display device according to the present invention, and more specifically, is an exploded plan view showing an example of the display device according to the present invention.
As shown in FIG. 6, the display device 200 has a display device front protective plate 201 and a display panel 203. The front protective plate 201 for the display device is arranged so that the surface of the translucent substrate on the side where the first color adjusting layer is provided faces the display panel 203.
The display device 200 shown in FIG. 6 has a touch panel 202 between the front protective plate 201 for the display device and the display panel 203.
Hereinafter, each embodiment of the display device according to the present invention will be sequentially described.

(First embodiment: Front protective plate for display device with integrated touch panel function: Part 1)
FIG. 7 is a cross-sectional view showing an example of the first embodiment of the display device according to the present invention. The display device 210 shown in the figure is a display device in order from the front side of the translucent substrate 11 side in the upper part of the drawing. It is provided with a front protective plate 211 and a display panel 213.

[Front protective plate 211 for display device]
As the front protective plate 211 for the display device in the present embodiment, one having a configuration in which the touch panel function is integrated is used.
The front protective plate 211 for a display device has the above-mentioned front protective plate 1 for a display device as a touch panel function, and further has a transparent electrode 204 and a wiring 205. As the transparent electrode 204, although not shown, a first transparent electrode It has a form having 204a and a second transparent electrode 204b.

As an example, the front protective plate 211 for a display device shown in FIG. 7 has a configuration in which a touch panel function is integrated with the front protective plate 1 for a display device described above, but in the present embodiment, it is illustrated. Instead of the display device front protection plate 1, the display device front protection plates 2 to 5 described above may be used in the same manner.
Further, in the present embodiment, other components such as a control circuit for functioning as a touch panel can be further provided.

Therefore, in the front protective plate 211 for the display device, in addition to the transparent electrode 204 and the wiring 205 for the touch panel, all the touch panel functions such as the control circuit and the connector for electrically connecting the control circuit and the wiring 205 are integrated. It may be used as a connector. Of course, in this case, when using the front protective plate 211 for a display device in which all the functions of the touch panel are integrated, it is not necessary to provide an independent touch panel, and the front protective plate 211 for the display device and the display panel 213 are provided. It is a display device with at least a configuration. In this form, the wiring, the connector, the control circuit, and the like on the outer peripheral portion of the display panel 213 can be hidden.

[Display panel 213]
The display panel 213 is typically a liquid crystal display panel or an electroluminescent (EL) panel, but may also be an electronic paper panel or a cathode ray tube, and may be various known display panels.

[Effect in this embodiment]
By using the display device 210 having the above configuration, it is possible to set both the display area P1 and the opaque area Q1 in a desired color in the display device front protective plate 211.
Furthermore, since the touch panel function is integrated, the number of parts is reduced, the assembly man-hours are reduced, and the cost can be reduced.

(Second embodiment: Front protective plate for display device with integrated touch panel function: Part 2)
FIG. 8 is a cross-sectional view showing an example of a second embodiment of the display device according to the present invention. The display device 220 shown in the figure is a display device in order from the front side of the translucent substrate 11 side in the upper part of the drawing. It is provided with a front protective plate 221 for use, a touch panel component 222a, and a display panel 223.

In the display device 210 according to the first embodiment illustrated in FIG. 7, the front protective plate 211 for the display device has a transparent electrode 204 (both the first transparent electrode 204a and the second transparent electrode 204b) as a part of the touch panel function. By providing the wiring 205, the touch panel function was integrated.

On the other hand, in the display device 220 according to the present embodiment illustrated in FIG. 8, the first transparent electrode 204a and the wiring 205a of the transparent electrode 204 are provided by the front protective plate 221 for the display device, and the first transparent electrode 204b and the wiring 205b are configured as a touch panel. This is a form included in the member 222a.
In a form that requires two layers of a first transparent electrode 204a and a second transparent electrode 204b that are insulated from each other, the position detection method of the touch panel using the transparent electrode composed of the first transparent electrode 204a and the second transparent electrode 204b is a projection method. The type capacitance method may be used, but a method other than the projection type capacitance method may be used.

As for the structure for integrating the front protective plate 221 for the display device and the touch panel component 222a, a structure suitable for various conditions such as usable manufacturing equipment and assembly process may be selected.

Since the display panel 223 is the same as the display panel 213 of the first embodiment, the description thereof will be omitted.

Further, as an example, the front protective plate 221 for a display device shown in FIG. 8 has a configuration in which the front protective plate 1 for a display device described above is provided with a first transparent electrode 204a and a wiring 205a. In the present embodiment, instead of the display device front protection plate 1, the display device front protection plates 2 to 5 described above may be used in the same manner.

[Effect in this embodiment]
With the display device 220 having the above configuration, it is possible to make both the display area P1 and the opaque area Q1 a desired color in the display device front protective plate 221.
Furthermore, since the touch panel function is integrated, the number of parts is reduced, the assembly man-hours are reduced, and the cost can be reduced.

(Third embodiment: front protective plate for display device in which the touch panel function is not integrated)
In the present embodiment, the front protective plate for the display device does not include the transparent electrode 204 for the touch panel and the wiring 205, and the touch panel function is not integrated.
FIG. 9 is a cross-sectional view showing an example of a third embodiment of the display device according to the present invention. The display device 230 shown in the figure is a display device in order from the front side of the translucent substrate 11 side in the upper part of the drawing. It is provided with a front protective plate 231 for use, a touch panel 232, and a display panel 233. The space between the front protective plate 231 for the display device and the touch panel 232 is filled with the resin layer 206.
The touch panel 232 schematically shows a transparent electrode 204 and a wiring 205.
Since the display panel 233 is the same as the display panel 213 of the first embodiment, the description thereof will be omitted.

[Front protective plate 231 for display device]
As the front protective plate 231 for the display device, one having a configuration that does not have a touch panel function is used.
Here, the front protective plate 231 for the display device shown in FIG. 9 illustrates the above-mentioned front protective plate 1 for the display device as an example, but in the present embodiment, the front protective plate 1 for the display device is used. Alternatively, the above-mentioned front protective plates 2 to 5 for a display device may be used in the same manner.
Further, although not shown, the front protective plate 231 for the display device may be provided with wiring in the opaque region Q1. When the front protective plate 231 for the display device also includes wiring as described above, this wiring can be used not for the touch panel but for, for example, for connecting the sensor.

[Touch panel 232]
The touch panel 232 is typically a projection type capacitance type touch panel capable of multi-touch (simultaneous input at multiple points), but in addition, a surface type capacitance type, an electromagnetic induction type, an optical type, etc. Any of the touch panels of various known position detection methods including the position detection method that does not require a transparent electrode may be used.
The touch panel 232 has some opaque components such as wiring, a control circuit, and a connector for electrically connecting these on the outer peripheral portion of the central position detection region. These opaque components are provided at positions where they overlap with the opaque region Q1 of the front protective plate 231 for the display device in a plan view so that the opaque components such as wiring do not impair the appearance of the display device 230. can do.

[Resin layer 206]
The resin layer 206 is a transparent layer, and an adhesive sheet, a solidified layer of the applied resin liquid, or the like can be used. As the pressure-sensitive adhesive sheet, a pressure-sensitive adhesive, a polyester-based pressure-sensitive adhesive, an epoxy-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, or the like can be used. As the resin liquid, an acrylic photocurable resin or the like can be used.
The resin layer 206 reduces light reflection on the surface of the member, so that the display can be made easier to see.

[Effect in this embodiment]
By using the display device 230 having the above configuration, it is possible to set both the display area P1 and the opaque area Q1 in a desired color in the display device front protective plate 231.
Further, since the touch panel function is laminated and integrated by the resin layer 206, the number of parts is reduced, the assembly man-hours are reduced, and the cost can be reduced.

(Transformed form as a display device)
The display device of the present invention may take other forms other than the above-mentioned forms. A part of them will be described below.

[Form without touch panel]
The display device in each of the above embodiments has a structure having a touch panel function, but in the present invention, the display device may not have a touch panel function such as not having a touch panel.

[Intervention of resin layer]
In the display device according to the embodiment illustrated in FIGS. 7 and 8, there is a gap between the front protective plate for the display device and the display panel, and an air layer exists. However, in the present invention, the display device has a structure in which an air layer exists. As described in the third embodiment illustrated in FIG. 9, the space between the constituent members, such as between the front protective plate for the display device and the display panel, may be filled with a resin layer 206 such as an adhesive layer. The resin layer 206 reduces light reflection on the surface of the member, so that the display can be made easier to see.

Although the embodiments of the front protective plate for the display device and the display device according to the present invention have been described above, the present invention is not limited to the above-described embodiment. The above-described embodiment is an example, and a device having substantially the same configuration as the technical idea described in the claims of the present invention and exhibiting the same effect and effect is the present invention in any case. Is included in the technical scope of.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
First, the curable resin compositions used in Examples 1 to 5 and Comparative Example 1 will be described.

(Preparation of curable resin composition)
In the polymerization tank, 63 parts by weight of methyl methacrylate (MMA), 12 parts by weight of acrylic acid (AA), 6 parts by weight of -2-hydroxyethyl methacrylate (HEMA), and 88 parts by weight of diethylene glycol dimethyl ether (DMDG) were charged. After stirring and dissolving, 7 parts by weight of 2,2'-azobis (2-methylbutyronitrile) was added and dissolved uniformly.
Then, the mixture was stirred at 85 ° C. for 2 hours under a nitrogen stream, and further reacted at 100 ° C. for 1 hour.
To the obtained solution, 7 parts by weight of glycidyl methacrylate (GMA), 0.4 parts by weight of triethylamine, and 0.2 parts by weight of hydroquinone were further added, and the mixture was stirred at 100 ° C. for 5 hours to prepare a copolymerized resin solution ( Solid content 50%) was obtained.
Next, the following materials were stirred and mixed at room temperature to obtain a curable resin composition.

(Composition of curable resin composition)
-The above copolymer resin solution (solid content 50%): 16 parts by weight-Dipentaerythritol pentaacrylate (Sartmer SR399): 24 parts by weight-Orthocresol novolac type epoxy resin (Oilized Shell Epoxy Co., Ltd. Epicoat 180S70): 4 parts by weight Parts ・ 2-Methyl-1- (4-Methylthiophenyl) -2-morpholinopropane-1-one: 4 parts by weight ・ Diethylene glycol dimethyl ether: 52 parts by weight

(White cured product resin composition)
-White pigment dispersion White pigment (titanium oxide, pigment concentration 50% by mass): 33 parts by weight-The curable resin composition: 17 parts by weight-Solvent (propylene glycol monomethyl ether acetate: PGMEA): 50 parts by weight

(Blue cured resin composition)
・ C. I. Pigment Blue 15: 6 dispersion: 13 parts by weight ・ The curable resin composition: 5 parts by weight ・ Solvent (propylene glycol monomethyl ether acetate: PGMEA): 82 parts by weight

(Composition of red curable resin composition)
-CI Pigment Red 177 dispersion: 13 parts by weight-The curable resin composition: 5 parts by weight-Solvent (propylene glycol monomethyl ether acetate: PGMEA): 82 parts by weight

(Composition of purple curable resin composition)
-CI Pigment Violet 23 dispersion: 13 parts by weight-The curable resin composition: 5 parts by weight (solid content 40%)
-Solvent (propylene glycol monomethyl ether acetate: PGMEA): 82 parts by weight

Next, Examples 1 to 5 and Comparative Example 1 will be described.
Here, as a method for measuring YI in Examples 1 to 5 and Comparative Example 1, a spectrophotometer UV-vis (UV-2550) manufactured by Shimadzu Corporation was used, and YI was obtained from the obtained spectrum according to the following formula. Calculated.
YI = 100 × (1.2985 × X-1.1335 × Z) / Y

(Example 1)
A polyimide (PI) film having a YI of 3.8 is used as the translucent substrate 11, and YI is 1.7 as the first color adjusting layer 12 in the display region and the opaque region of the translucent substrate 11. After forming the blue cured resin composition so as to be, and forming the first color adjusting layer 12, the second color adjusting layer 13 is formed in the opaque region of the translucent substrate 11 in the C light source (x). The red cured resin composition is formed so that, y, Y) = (0.314,0.316,97.6), and the white cured resin composition is formed on the red cured resin composition as the first decorative layer 14. A front protective plate 1 for a display device having a shape of 20 μm and having the form shown in FIG. 1 was obtained.
A light-shielding layer having a film thickness of 1.0 μm was formed on the white cured resin composition (on the side opposite to the second color adjusting layer 13).

(Example 2)
A polyimide (PI) film having a YI of 3.8 is used as the translucent substrate 21, and YI is 1.7 as the first color adjusting layer 22 in the display region and the opaque region of the translucent substrate 21. After forming the blue cured product resin composition so as to be, and forming the first color adjusting layer 22, the white cured product resin is used as the second decorative layer 23 in the opaque region of the translucent substrate 11. A toned white cured product resin composition obtained by mixing the composition and the above red cured product resin composition was formed with a thickness of 20 μm to obtain a front protective plate 2 for a display device having the form shown in FIG.
A light-shielding layer having a film thickness of 1.0 μm was formed on the white cured resin composition (on the side opposite to the first color adjusting layer 22) in the same manner as in Example 1.

(Example 3)
A polyimide (PI) film having a YI of 3.8 is used as the translucent substrate 31, and a YI of 1.7 is used as the first color adjusting layer 32 in the display area of the translucent substrate 31. After forming the above-mentioned blue cured resin composition and forming the first color adjusting layer 32, the third color adjusting layer 33 was formed in the opaque region of the translucent substrate 31 in the C light source (x, y, The purple cured product resin composition is formed so that Y) = (0.310, 0.314, 97.2), and a white cured product resin composition having a thickness of 20 μm is formed on the purple cured product resin composition as the first decorative layer 34. Then, a front protective plate 3 for a display device having the form shown in FIG. 3 was obtained.
A light-shielding layer having a film thickness of 1.0 μm was formed on the white cured resin composition (on the side opposite to the third color adjusting layer 33) in the same manner as in Example 1.
Here, as the above-mentioned method for measuring YI, a spectrophotometer UV-vis (UV-2550) manufactured by Shimadzu Corporation was used, and YI was calculated from the obtained spectrum according to the following formula.
YI = 100 × (1.2985 × X-1.1335 × Z) / Y

(Example 4)
A polyimide (PI) film having a YI of 3.8 is used as the translucent substrate 41, and the YI is 1.7 as the first color adjusting layer 42 in the display area of the translucent substrate 41. After forming the blue cured resin composition and forming the first color adjusting layer 42, the white cured resin composition and the above are used as the third decorative layer 43 in the opaque region of the translucent substrate 31. A toned white cured product resin composition mixed with a purple cured product resin composition was formed with a thickness of 20 μm to obtain a front protective plate 4 for a display device in the form shown in FIG.
A light-shielding layer having a film thickness of 1.0 μm was formed on the toned white cured resin composition (on the side opposite to the translucent substrate 41) in the same manner as in Example 1.

(Example 5)
A polyimide (PI) film having a YI of 3.8 is used as the translucent substrate 51, and the YI is 1.7 as the first color adjusting layer 52 in the display area of the translucent substrate 51. After forming the blue cured resin composition and forming the first color adjusting layer 52, the white cured resin composition was used as the first decorative layer 53 in the opaque region of the translucent substrate 51. Was formed to have a film thickness of 20 μm, and a front protective plate 5 for a display device having the form shown in FIG. 5 was obtained.
A light-shielding layer having a film thickness of 1.0 μm was formed on the white cured resin composition (on the side opposite to the translucent substrate 51) in the same manner as in Example 1.

(Comparative Example 1)
A polyimide (PI) film having a YI of 3.8 is used as the translucent substrate 101, and the YI is 1.7 as the color adjustment layer 102 in the display region and the opaque region of the translucent substrate 101. After forming the blue cured resin composition and forming the color adjusting layer 102, the white cured resin composition was applied as a decorative layer 103 in the opaque region of the translucent substrate 101 to a thickness of 20 μm. A front protective plate 100 for a display device having the shape shown in FIG. 11 was obtained.
A light-shielding layer having a film thickness of 1.0 μm was formed on the white cured resin composition (on the side opposite to the color adjusting layer 102) in the same manner as in Example 1.

(Evaluation)
For the front protective plates for each display device obtained in Examples 1 to 5 and Comparative Example 1 above, the color characteristics of the opaque region were determined by using CM-2500d (D65 light source) manufactured by Konica Minolta Co., Ltd. evaluated. The results are shown in Table 1.

As shown in Table 1, in Examples 1 to 4, the color characteristics of the opaque region are
L ^* ≧ 80 and −0.5 ≦ a ^* ≦ 0.5 and −0.5 ≦ b ^* ≦ 0.5
It was excellent in that it satisfied the above conditions and exhibited white color.
In Example 5, although the color characteristics of the opaque region ^{satisfy L *} ≧ 80,
-0.5 ≤ a ^* ≤ 0.5 and -0.5 ≤ b ^* ≤ 0.5
The condition of was not satisfied.

On the other hand, in Comparative Example 1, although the color characteristics of the opaque region ^{satisfy L *} ≧ 80,
-0.5 ≤ a ^* ≤ 0.5, and -0.5 ≤ b ^* ≤ 0.5,
It deviated greatly from the above conditions and was inferior in that it exhibited white color.

In each of Examples 1 to 5 and Comparative Example 1, the color characteristics of the display area were good.

1, 2, 3, 4, 5 Front protective plates for display devices 11, 21, 31, 41, 51 Translucent substrates 12, 22, 32, 42, 52 First color adjustment layer 13 Second color adjustment layer 14, 34, 53 First decorative layer 23 Second decorative layer 33 Third color adjustment layer 43 Third decorative layer 100 Front protective plate for display device 101 Translucent substrate 102 Color adjustment layer 103 Decorative layers 200, 210, 220 Display devices 201, 211, 221 Front protective plate for display devices 202, 222 Touch panel 203, 213, 223 Display panel 204 Transparent electrode 204a First transparent electrode 204b Second transparent electrode 205, 205a, 205b Wiring 206 Resin layer 222a Touch panel component

Claims (3)

A front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light.
With a translucent substrate,
On one surface of the translucent substrate,
A first color adjustment layer that adjusts the color of the translucent substrate to a transparent color,
A first decorative layer composed of a resin containing a white pigment and
A second color adjustment layer that adjusts the color of the first decorative layer to white, and
Have,
The translucent substrate has polyimide and
The first color adjusting layer has a resin containing a blue pigment, and the first color adjusting layer has a resin containing a blue pigment.
The second color adjustment layer is composed of a resin containing a red pigment.
The first color adjusting layer is provided in the display area and the opaque area of the translucent substrate.
The second color adjusting layer is provided on the first color adjusting layer provided in the opaque region of the translucent substrate.
A front protective plate for a display device, wherein the first decorative layer is provided on the second color adjusting layer. A front protective plate for a display device having a display area and an opaque area provided on the outer peripheral portion of the display area to block visible light.
With a translucent substrate,
On one surface of the translucent substrate,
A first color adjustment layer that adjusts the color of the translucent substrate to a transparent color,
A second decorative layer composed of a resin containing a white pigment and a second color adjusting pigment,
Have,
The translucent substrate has polyimide and
The first color adjusting layer has a resin containing a blue pigment, and the first color adjusting layer has a resin containing a blue pigment.
The first color adjusting layer is provided in the display area and the opaque area of the translucent substrate.
The second decorative layer is provided on the first color adjusting layer provided in the opaque region of the translucent substrate .
The front surface for a display device , wherein the second color adjusting pigment contains a red pigment, and the resin containing the second color adjusting pigment adjusts the color of the first decorative layer to white. Protective plate. The display device front protective plate according to claim 1 or 2 , further comprising a display panel, the display device front protective plate is provided with a first color adjusting layer of the translucent substrate. A display device, characterized in that the surface on the side facing the display panel is arranged so as to face the display panel.

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