JP2010160027A - Display plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display plate capable of obtaining high quality texture deeper than conventional ones, metal feeling similar as metal display plates, and clear color with deep dense hue, and possessing apparent quality with high quality feeling by looking straight at the surface of the smoothly polished display plate, and to achieve improvement in design variation and thickness reduction of the display plate. <P>SOLUTION: The display plate includes a light-transmitting substrate with light-transmitting properties and a light diffusion part formed at a side opposite to a visible side of the light-transmitting substrate, wherein the display plate includes a colored resin layer having a smooth surface smoothed by smoothing treatment formed at the visible side of the light-transmitting substrate. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

The present invention relates to a display board including a timepiece dial, a clock parting board, an instrument dial, and the like, and more particularly to a display board having a solar cell on the lower surface side.
The present invention also relates to equipment using such a display board as a display board of equipment such as a display board for a clock, a desk calculator, an automobile, an instrument panel of an airplane, a mobile phone, etc. .

  A display panel provided with a solar cell (solar cell) is required to transmit light in order to transmit received light and cause a solar cell disposed on the lower surface side to generate a power generation function. For this reason, translucent materials such as plastic, ceramic and glass are used. In particular, plastics are very often used because they are inexpensive and easy to mold and process.

FIG. 18 is a plan view showing a general solar cell.
In the present specification, “upper surface side” and “upper layer side” are sides arranged on the viewing side, and “lower surface side” and “lower layer side” are opposite to the viewing side, for example, solar The side where the cell, antenna, movement, etc. are arranged.

  As shown in FIG. 18, a general solar cell is provided on four surfaces (A1, A2, A3, A4) divided into four equal parts, and is disposed on the lower surface of the display panel. And, the transmitted light that has passed through the display panel is uniformly incident on each of the four surfaces (A 1, A 2, A 3, A 4) so that the power generation efficiency is most enhanced. For this reason, the display board arrange | positioned at the upper surface side of this solar cell is a part corresponding to four surfaces (A1, A2, A3, A4) of a solar cell, ie, 12-6 o'clock line and 9-3 o'clock line. Therefore, it is necessary to design the four surfaces divided into four equal parts so as to transmit a uniform amount of light.

  However, the solar cell disposed on the lower surface side of the display panel shows a unique dark purple color, and the cross lines obtained by dividing into four equal parts are very conspicuous due to the difference in materials. For this reason, since it does not give an aesthetically pleasing feeling, various attempts have been made to display panels in order to soften or hide this dark purple color.

  In addition, such a display board is required to have a high-class decorative property, and conventionally, the decoration of the display board has been subjected to printing, painting, dry plating on the upper surface side or the lower surface side of the light-transmitting substrate, Various ingenuity has been made to give a sense of quality. In this case, various materials such as a pearl pigment, a fluorescent pigment, and a metallic pigment are used in order to give a high-class feeling to the pigment used.

  However, just by providing a resin layer by printing or painting on the upper surface side of the light-transmitting substrate, there is no smoothness, minute irregularities are formed like so-called `` Yuzu skin '', and the aesthetics deteriorate, It lacks luxury and lacks gloss, and lacks luxury.

For this reason, for example, as shown in FIG. 19, a display panel 100 in which a colored resin layer 104 is formed on the lower surface side of a light-transmitting substrate 102 having light transmittance has been proposed.
Further, in Patent Document 1 (Japanese Patent Laid-Open No. 2008-164366), there is a solar timepiece dial that can achieve a glossy or deep color tone with a white or light color tone that is more luxurious than black. Proposed.

  As shown in FIG. 20, the display plate 200 described in Patent Document 1 includes a light-transmitting substrate 202 having a light-transmitting property such as polycarbonate. Light is applied to the surface of the light-transmitting substrate 202. A diffusible groove 204 is formed.

  Then, on the upper surface side of the groove 204, a low-temperature thermosetting paint is used to form a transparent or lightly colored coating film 206 having a light transmittance of 20 μm or more. A smooth surface 208 is formed on the upper surface side of 206 by mirror polishing.

Furthermore, a coating film 210 for adjusting the hue and light transmittance of the light transmissive substrate 202 is formed on the lower surface side of the light transmissive substrate 202.
According to the display plate 200 of Patent Document 1, it is possible to relieve the glare of the light-transmitting substrate 202 and to obtain a moist and deep color.

Moreover, in the display board 200 of patent document 1, the surface pattern formed in the surface of the transparent substrate 202 is visually recognized, and it is described that the one where the film thickness of the coating film 206 is larger is better.
Further, in Patent Document 2 (Japanese Patent Laid-Open No. 2003-66162), as shown in FIG. 21, a display board 300 having a three-dimensional pattern layer that makes a concavo-convex pattern with a depth appear to give a sense of luxury is proposed. Has been.

  The display board 300 includes a light-transmitting substrate 302 having a light-transmitting property such as polycarbonate. A pattern-shaped uneven portion 304 such as a Piaget cut pattern is formed on the surface of the light-transmitting substrate 302. ing.

  Then, an intermediate layer 306 made of a transparent film formed by vapor-depositing magnesium fluoride, for example, is formed on the upper surface side of the patterned uneven portion 304 of the light transmitting substrate 302 so as to cover the uneven portion 304. ing.

  Further, a transparent protective layer 308 made of clear coating made of acrylic resin or the like is formed so as to cover the surface of the intermediate layer 306. A smooth surface 310 is formed on the upper surface side of the transparent protective layer 308 by, for example, a smoothing process such as a polishing process.

  In the display plate 300 of Patent Document 2 having such a configuration, the pattern of the uneven portion 304 of the light-transmitting substrate 302 is clearly visible.

JP 2008-164366 A JP 2003-66162 A

  However, in the conventional display panel 100 as shown in FIG. 19, a decorative member 106 such as a time letter is formed on the upper surface side of the light-transmitting substrate 102 as shown in FIG. At this time, the shadow 108 of the decorative member is formed through the light transmissive substrate 102 and projected onto the colored resin layer 104 existing on the lower surface side, and the shadow 108 is visually recognized. That is, although the shadow is seen through the light-transmitting substrate 102, the light-transmitting substrate 102 looks as if it is a thick resin layer and lacks a high-class feeling.

  On the other hand, in the display plate 200 of Patent Document 1, since it is necessary to form the groove portion 204 capable of diffusing light on the surface of the light-transmitting substrate 202, the processing is complicated and the cost is increased. The light-transmitting substrate 202, particularly the lower surface of the light-transmitting substrate 202, may be unintentionally scratched, which may result in poor appearance.

Moreover, in the display board 200 of this patent document 1, it is difficult to manage the film thickness of the coating film 206,
If the coating film 206 is too thin, the upper surface of the light-transmitting substrate 202 may be damaged by mistake when the smooth surface 208 is formed on the upper surface side of the coating film 206 by mirror polishing. There is a risk of poor appearance.

Furthermore, since the coating material that forms the coating film 206 is applied to the groove portion 204 that is the pattern surface, the pattern becomes difficult to see.
Furthermore, in the display board 200 of Patent Document 1, the colored coating film 206 has a film thickness of 20 μm or more, thereby preventing uneven color in the coating film 206 by controlling the thickness of the coating film 206. The light transmittance is controlled by mirror-polishing 206, but it is extremely difficult to control the light unevenness and the light transmittance by managing the thickness of the coating film 206.

Furthermore, in the display board 200 of this Patent Document 1, a coating film 210 for adjusting the hue and light transmittance of the light-transmitting substrate 202 must be provided on the lower surface side of the light-transmitting substrate 202. It is complicated and expensive.

Further, in the display board 200 of Patent Document 1, the colored coating film 206 is formed on the colored coating film 206, and in the display board 300 of Patent Document 2, the intermediate layer 306 is wrinkled with a so-called crushed skin, which is visually recognized. As a result, both the aesthetics and the appearance quality are degraded.

Further, in the display plate 200 of Patent Document 1, both the light-transmitting substrate 202 and the light-transmitting substrate 302 of the display plate 300 in Patent Document 2 are conspicuous. Further, for example, when a polycarbonate resin is used as a substrate, chemical resistance is weak, so that damage to the substrate due to chemicals is visually recognized, and the appearance quality is also deteriorated.

Further, in the conventional display boards such as Patent Document 1 and Patent Document 2, as shown by arrows of the display board 100 schematically shown in FIG. The light is diffusely reflected on the surface.

  Further, as shown in FIG. 23, in the conventional display panel 100 in which the uneven pattern 106 is formed on the surface of the light-transmitting substrate 102 on the viewing side, the uneven pattern 106 is diffused as shown by the arrows in FIG. It is supposed to lack a sense of quality by being visually recognized as white by reflection.

  Therefore, the diffuse reflected light makes the display plate 100 appear whitish to the viewer, the plastic is emphasized and visually recognized, and it is impossible to obtain a high-quality display plate with a metallic feeling.

  Even if the colored resin layer 104 made of the light transmissive substrate 102 or the printing formed on the back surface of the light transmissive substrate 102 is dark, no matter how dark the diffuse reflection portion (uneven pattern 106 present on the viewing side) is. ) Diffused reflected light becomes white, the texture is deteriorated, the plastic is emphasized and visually recognized, and a display board overflowing in a high-class feeling with a metallic feeling cannot be obtained.

Further, in the conventional display panel 100, the colored resin layer 104 made of printing or the like formed on the back surface of the light-transmitting substrate 102 due to the influence of diffuse reflection light by the diffuse reflection portion (uneven pattern 106) present on the viewing side is provided. However, no matter how dark the color is, it becomes easy to recognize the light color, and it is not possible to obtain a display plate with a deep color tone peculiar to metal.

  Furthermore, the subtle color difference due to the colored resin layer 104 made of printing or the like formed on the back surface of the light-transmitting substrate 102 is recognized due to the influence of the diffuse reflection light by the diffuse reflection portion (uneven pattern 106) present on the viewing side. However, it will also lack design variations.

  In addition, as shown in FIG. 24, in the conventional display panel 400, when a colored resin layer is provided on the surface of the diffuse reflection portion (pattern) 404 existing on the viewing side as in Patent Document 1, light transmission is achieved. When the plastic substrate 402 itself has a low reflectivity and plastic is used for the light-transmitting substrate 402, materials with similar refractive indexes come into contact with each other, so that the pattern 404 becomes difficult to be seen and the colored resin layer's distorted skin becomes conspicuous. As a result, the appearance and the quality of the appearance are deteriorated.

  In view of the current situation, the present invention supplies a sufficient amount of light for power generation of a solar cell so that the crosshairs and dark purple of the solar cell are not visible, and provides a display panel with excellent decorativeness. The purpose is to do.

  In addition, the present invention provides a deep, high-quality texture, a metallic feeling similar to that of a metal display board, and a deep dark, vivid color by directly viewing the surface of a smoothly polished display board. An object of the present invention is to provide a display panel having a high-quality appearance and to improve the design variation and thickness of the display panel.

  In addition, the present invention is applicable even if the light-transmitting substrate is made of a soft material such as plastic, and the substrate is damaged by chemicals even if the substrate is damaged in the manufacturing process of the light-transmitting substrate. It is an object of the present invention to provide a display panel that can improve the aesthetics and appearance quality, improve the yield, and provide an inexpensive product.

  Furthermore, the present invention provides a display panel in which a colored resin layer is provided or a wrinkle of a coating such as a so-called yuzu skin is not visually recognized and the appearance and appearance quality are not deteriorated. The purpose is to provide.

  In addition, the present invention also provides a high-class feeling because, even when a decorative member such as a time letter is formed on the upper surface side of the light-transmitting substrate, the shadow of the decorative member is difficult to see and the texture of the plastic display board disappears. An object of the present invention is to provide a display panel that is not lacking in.

  In the present invention, since the diffuse reflection portion (pattern) is located below the colored layer, the diffuse reflection light of the diffuse reflection portion (pattern) becomes colored, the texture is improved, and the diffused light on the viewing side surface Is reduced, and the dark color is recognized as a dark color, which is advantageous for obtaining a display panel having a dark color and a metal-specific texture. Moreover, the diffuse reflection part (pattern) is air (refractive index). 1) To provide a display board that has high reflectivity of the diffuse reflection part (pattern) and is easy to see the pattern, overflowing with a high-class feeling with a metallic feeling, and can expand design variations. Objective.

  Further, according to the present invention, a light-transmitting reflector having a specular reflection function is disposed on the surface opposite to the viewing side of the light-transmitting substrate. The light makes it easy to see the pattern, and at other angles, there is no reflection and it becomes darker, which is advantageous for obtaining a display board with a metal-specific texture, and the pattern is easily visible. An object is to provide a display board that is rich in metal and has a high-class feeling and that can be used to expand design variations.

Furthermore, the present invention provides a device using such a display board as a display board of a device such as a display device for a clock, a desk calculator, an automobile, an instrument panel of an airplane, a mobile phone, etc. The purpose is to provide.

The present invention has been invented in order to achieve the problems and objects in the prior art as described above.
A light transmissive substrate having light transparency;
A light diffusing portion formed on the side opposite to the viewing side of the light transmissive substrate;
It is characterized by providing.

Further, the display panel of the present invention is characterized in that the transmissive substrate is provided with a colored region. With this configuration, a light diffusion portion is formed on the surface opposite to the viewing side of the light transmissive substrate. As a result, light is diffused by the light diffusing section, so that the diffused light on the surface on the viewing side is reduced and the dark color is recognized as a dark color. It is advantageous to obtain a display panel having

  In addition, it is possible to provide a display plate in which light is diffused by the light diffusing portion, the pattern of the light diffusing portion is easily visible, overflowing with a high-class feeling with a metallic feeling, and design variations can be expanded.

A light transmissive substrate;
A light diffusing portion formed on the side opposite to the viewing side of the light transmissive substrate;
A transparent resin layer formed on the viewing side of the light transmissive substrate,
The light-transmitting substrate has a colored region;
The transparent resin layer has a smooth surface smoothed by a smoothing process.

Moreover, the display board of this invention has the smooth surface smooth | blunted by the smoothing process in the visual recognition side of the said transparent substrate.
By configuring in this way, light is specularly reflected on this smooth surface, so by looking directly at the surface of the smoothly polished display panel, there is an unprecedented depth, glossy high-quality texture and Thus, it is possible to provide a display panel having a metallic appearance similar to that of a metal display panel and a clear color having a deep dark color and having a high-quality appearance.

In the display panel of the present invention, the colored region is a light-transmitting substrate having a color.
Thus, it can be set as the structure which has color (color tone and diffusion material containing) in the light-transmitting board | substrate itself.

In the display panel of the present invention, the colored region is a light-transmitting substrate having a color.
With this configuration, the light-transmitting substrate itself can be colored, or the colored layer formed on the viewing side of the transparent substrate can supply a sufficient amount of light for solar cell power generation. Since the distance from the upper surface of the cell to the lower surface of the colored layer is separated, the crosshairs and dark purple of the solar cell can be made invisible.

The display panel of the present invention includes a transparent resin layer formed on the viewing side of the colored layer,
The transparent resin layer has a smooth surface smoothed by a smoothing process.

  By constructing in this way, the reflected light from the colored layer formed on the viewing side of the light-transmitting substrate can be viewed through the transparent resin layer by directly looking at the surface of the smoothly polished display panel. Therefore, it is possible to provide a display panel having a high-class appearance quality that can provide a high-quality texture with a deep depth, a metallic feeling similar to that of a metal display board, and a clear color with a deep dark color. Can do.

In the display panel of the present invention, the colored layer is a colored resin layer.
With this configuration, the reflected light from the colored resin layer formed on the viewing side of the light-transmitting substrate is visually recognized through the transparent resin layer by directly looking at the surface of the smoothly polished display panel. Therefore, it is possible to obtain a display panel having a high-class appearance quality, which can provide a high-quality texture with a deep depth, a metallic feeling similar to that of a metal display board, and a deep, deep, vivid color. be able to.

  Moreover, the colored resin layer can supply a sufficient amount of light for power generation of the solar cell, and the distance from the upper surface of the solar cell to the lower surface of the colored resin layer is structurally separated. Or dark purple can be made invisible.

  Even if the light-transmitting substrate is made of a soft material such as plastic, even if scratches occur in the manufacturing process of the light-transmitting substrate, or even if the substrate is damaged by chemicals, these scratches will not be Invisible, aesthetics and appearance quality are improved, yield is improved, and inexpensive products can be provided.

Furthermore, even if a colored resin layer is provided or wrinkles of the coating such as so-called yuzu skin occur, this is not visually recognized, and neither the aesthetic appearance nor the appearance quality is deteriorated.
Also, for example, when a decorative member such as a time letter is formed on the upper surface side of the light-transmitting substrate, the shadow of the decorative member is hardly visible, the texture of the plastic display board disappears, and the sense of quality may be lacking. Absent.

  Furthermore, when the transparent resin layer is smoothed by the smoothing process to form a smooth surface, the colored resin layer is present, so that the smooth transparent process does not damage the light-transmitting substrate and has a constant appearance quality. Can be held.

Further, the display panel of the present invention is characterized in that a reflective transmission film is formed on the surface of the light diffusion portion formed on the opposite side to the viewing side of the light transmissive substrate.
By forming a reflective transmission film on the surface of the light diffusing part in this way, the reflectance increases due to the specular reflection effect of the reflective transmissive film, the pattern of the light diffusing part is easily visible, and there is a metallic feeling. It is possible to provide a display board that is full of luxury and can be expanded in design variation.

In the display panel of the present invention, the reflective transmissive film is a reflective transmissive film made of metal, metal oxide, metal nitride, or metal oxynitride.
Thus, if the reflective transmission film is a reflective transmission film made of metal, metal oxide, or metal nitride, the specular reflection effect is improved, the reflectance is increased, and the pattern of the light diffusion portion is easily visible. In addition, it is possible to provide a display board that is full of metal and has a high-class feeling and that can be used to expand design variations.

  In this case, the metal constituting the reflective transmission film is not particularly limited. For example, one or more metals selected from gold, silver, copper, aluminum, nickel, magnesium, zinc, titanium, and silicon are used. Or an alloy of two or more metals selected from these metals.

  Further, the metal oxide constituting the reflective transmission film is not particularly limited, but for example, at least selected from zirconium oxide, niobium oxide, titanium oxide, iron oxide, tin oxide, silicon oxide, and aluminum oxide. It can be formed from one metal oxide.

  The reflective transmissive film may be a thin film having a function of reflecting a part of light and transmitting another part of the light, for example, 100 to 3000 mm, preferably 500 to 1500 mm. The thickness should be

The display panel of the present invention is characterized in that an increase in reflectance of the display panel by the reflective transmission film is an increase of 4 to 80%.
In this way, if the reflectivity of the display panel due to the reflective transmissive film is within this range, the pattern of the light diffusing part can be easily seen, overflowing with a sense of quality with a metallic feel, and expanding design variations. A display board can be provided.

Further, the display panel of the present invention is characterized in that a light transmissive reflecting plate is disposed on the side opposite to the viewing side of the light transmissive substrate.
In this way, by disposing a light transmissive reflector having a specular reflection action on the surface opposite to the viewing side of the transmissive substrate, when viewed from the angle of specular reflection of the light transmissive reflector, The specularly reflected light makes it easy to see the pattern. At other angles, the reflection is eliminated, making it darker and more advantageous for obtaining a display board with a metal-specific texture. A display board that is easy to be touched, overflows with a sense of quality and has a metallic feel, and can be expanded in design variation.

  In this case, the light transmissive reflecting plate is not particularly limited as long as it has a reflecting function as well as a light transmitting function. For example, a reflective polarizing plate or a transmissive reflecting plate is adopted. be able to.

The display panel of the present invention is characterized in that an increase in reflectance of the display panel by the light transmissive reflector is an increase of 4 to 80%.
In this way, if the reflectivity of the display panel due to the light-transmitting reflector is within such a range, the pattern of the light diffusing part is easy to see, overflowing with a sense of luxury with a metallic feeling, and expanding design variations It is possible to provide a display board that can achieve the above.

In the display panel of the present invention, the reflective transmission film has a color tone close to that of the colored layer.
Moreover, the display board of the present invention is characterized in that the light-transmitting reflector has a color tone close to that of the colored layer.

  In this way, by providing the reflective transmissive film or light transmissive reflector with a color tone close to the colored layer, the whiteness of the reflected light is reduced, and the color tone itself can be seen, increasing the design variation. It will be planned.

In the display board of the present invention, the colored region has a haze value of 1% or less to 70% or less.
If the haze value of the colored region is in such a range, the light diffusion action is reduced, the diffused light on the surface on the viewing side is reduced, the dark color is visually recognized as a dark color, and the pattern is visually recognized as a dark color. It is easy to obtain a display panel having a metal-specific texture.

  In addition, a diffused light on the surface of the viewing side is reduced, light is diffused by the light diffusing part, the pattern of the light diffusing part is easy to see, overflowing with a sense of quality with a metallic feeling, and an expansion of design variations Can be provided.

In the present specification, the “polishing process” means including means for performing a mirror surface process such as a lapping process or a polishing process.
The display board of the present invention is
A solar cell is provided on the side opposite to the viewing side of the display board,
The surface on the viewing side of the solar cell has a smooth cell surface smoothed by a smoothing process.

  As described above, the surface on the viewing side of the solar cell has a smoothed cell smooth surface by the smoothing process, so that the reflectance increases due to the mirror reflection of the cell smooth surface, and the pattern of the light diffusion portion is visually recognized. It is easy to provide a display board that is rich in metal and has a high-class feel, and that can be used to expand design variations.

  In this case, the smoothing treatment for forming the cell smooth surface is not particularly limited. For example, using a metal having high light reflectance such as chromium, nickel, aluminum, palladium, rhodium, platinum, For example, an extremely thin metal film of 100 to 3000 mm, preferably 500 to 1500 mm, formed by dry plating such as vapor deposition or ion plating can be used. This reflective transmission film reflects a part of light. The thin film has a function of absorbing the other part of the light and transmitting the remaining light.

The display board of the present invention is
In the L * a * b * color system defined by JIS Z 8729, the color of the colored layer is the following conditional expression:

One of the conditional expressions is satisfied.
If the color of the colored resin layer is in such a range, it will be possible to obtain an unprecedented depth and glossy high-quality texture, a metallic feeling similar to that of a metal display board, and a vivid color with a deep dark color. It is possible to provide a display panel having a pleasant appearance quality.

The display panel of the present invention is characterized in that the transparent resin layer is composed of a transparent resin layer in which a plurality of laminated transparent resin layers are laminated.
Thus, since the transparent resin layer is comprised from the transparent resin layer which laminated | stacked the several laminated transparent resin layer, a smooth surface is formed by smoothing a transparent resin layer with these several laminated transparent resin layers. In some cases, the transparent resin layer remains and the colored resin layer is not damaged, and a certain appearance quality can be maintained.

In the display panel of the present invention, the transparent resin layer is characterized in that the hardness of the laminated transparent resin layer on the upper layer side is larger than the hardness of the laminated transparent resin layer on the lower layer side.
Thus, since the hardness of the laminated transparent resin layer on the upper layer side is larger than the hardness of the laminated transparent resin layer on the lower layer side, the transparent resin layer can be easily smoothed by smoothing the transparent resin layer to form a smooth surface. Even in this smoothing treatment, the transparent resin layer on the lower layer side remains, so that the colored resin layer is not damaged and a certain appearance quality can be maintained.

The display panel of the present invention is characterized in that the colored region is composed of a colored layer in which a plurality of laminated colored layers are laminated.
In this way, the colored region is composed of a colored layer formed by laminating a plurality of laminated colored layers, so that these laminated colored layers are overlapped, the design variation is expanded, and there is an unprecedented depth and glossiness A high-quality texture, a metallic feeling similar to that of a metal display board, and a clear color with a deep dark color can be obtained, and a display board having a high-quality appearance quality can be provided.

The display panel of the present invention is characterized in that at least one of the laminated colored resin layers is provided so as to form a pattern.
By configuring in this way, the pattern of the laminated colored resin layer seems to be raised, the variation of the design is expanded, the depth, glossy high-quality texture and the metal display board that are not in the past Therefore, it is possible to provide a display panel having a high-quality appearance quality.

In the display panel of the present invention, the light-transmitting substrate contains at least one of a colorant and a diffusing agent.
As described above, since the light-transmitting substrate contains at least one of the colorant and the diffusing agent, the color variation can be expanded by the colorant and the diffusing agent. The brightness of this product is improved, and it is possible to obtain an unprecedented depth and glossy high-quality texture, a metallic feeling similar to that of a metal display panel, and a vivid color with a deep dark color, giving it a high-quality appearance quality. A display board can be provided.

  In addition, since the light-transmitting substrate contains at least one of a colorant and a diffusing agent, the thickness of the colored resin layer can be reduced accordingly, so that the thickness of the entire display panel can be reduced. A compact display board can be provided.

The display panel of the present invention is characterized in that a matte part is formed on at least a part of the smooth surface.
In this way, for example, matte printing with ink containing particles such as silica, matte processing by surface roughening treatment, etc., by forming a matte part on at least a part of the smooth surface, design variations Can be expanded.

The display panel of the present invention is characterized in that a pattern is formed on at least a part of the smooth surface.
Thus, the design variation can be expanded by forming a pattern on at least a part of the smooth surface.

In this case, as a method for forming a pattern on the smooth surface, for example, a water-soluble photoresist is coated on the upper surface of the smooth surface, and then a pre-baking is performed to form a resist film, and the resist film has a predetermined pattern. A positive film or negative film is overlaid, exposed, developed and burned to form a resist pattern. Reactive sputtering forms a pattern on the smooth surface, and the resist film is peeled off with a stripper. Can be formed.

Moreover, the display board of this invention is characterized by the outer peripheral part of the said display board being fixed by the fixing member.
By comprising in this way, for example, the outer peripheral part of each surface is fixed with a fixing member via an adhesive material or an adhesive, so that the light-transmitting substrate, the colored resin layer, and the transparent resin layer are interposed. The module display board integrated with the solar cell can also be provided.

  With this configuration, for example, when used as a display board for devices such as a clock display board, a desk calculator, an automobile, an instrument panel of an airplane, a mobile device such as a mobile phone, etc. When used in a wristwatch or the like, it is possible to supply a sufficient amount of light for power generation of the solar cell so that the crosshairs and dark purple of the solar cell are not visible.

In addition, design variations can be improved and thickness can be reduced, such as the expression of a three-dimensional uneven pattern with depth.
In addition, a device equipped with a display board with a high-quality appearance quality, which has an unprecedented depth and glossy high-quality texture, a metallic feeling similar to that of a metal display board, and a clear color with a deep dark color. Can be provided.

Moreover, it is desirable that the ratio between the thickness of the colored resin layer and the thickness of the transparent resin layer is in the range of 1: 200 to 50: 1.
If the ratio between the thickness of the light-transmitting substrate and the combined thickness of the colored resin layer and the transparent resin layer is within such a range, the light transmission can be achieved even when the transparent resin layer is smoothed to form a smooth surface. Due to the rigidity of the conductive substrate, it is easy to handle even during the smoothing process, and even during the smoothing process, the transparent resin layer remains and the colored resin layer is not damaged and maintains a certain appearance quality. be able to.

In the display panel of the present invention, the distance from the upper surface of the solar cell to the lower surface of the colored resin layer is in the range of 100 to 2000 μm.
By constructing in this way, the distance from the upper surface of the solar cell to the lower surface of the colored resin layer is structurally separated, so that the crosshairs and dark purple of the solar cell are not visible. be able to.

  According to the present invention, since the light diffusing portion is formed on the surface opposite to the viewing side of the light transmissive substrate, the light is diffused by the light diffusing portion. By reducing the dark color and recognizing it as a dark color, it is advantageous to obtain a display panel that is dark and has a metal-specific texture.

  In addition, it is possible to provide a display plate in which light is diffused by the light diffusing portion, the pattern of the light diffusing portion is easily visible, overflowing with a high-class feeling with a metallic feeling, and design variations can be expanded.

  In addition, since the smooth substrate has a smooth surface smoothed by the smoothing process on the viewing side of the transmissive substrate, the light is specularly reflected on the smooth surface. In this way, we can provide a display panel with a high-class appearance quality that gives us an unprecedented depth and glossy high-quality texture, a metallic feel similar to that of a metal display board, and a vivid color with deep dark colors. can do.

  In addition, since a colored layer such as a colored resin layer is formed on the viewing side of the light-transmitting substrate, the colored layer can supply a sufficient amount of light for power generation of the solar cell, and the solar cell is structurally Since the distance from the upper surface of the solar cell to the lower surface of the colored layer is separated, the crosshairs and dark purple of the solar cell can be made invisible.

  And a transparent resin layer formed on the viewing side of the colored layer, and since the transparent resin layer has a smoothed surface smoothed by a smoothing process, the surface of the display plate polished smoothly should be viewed directly Therefore, the reflected light from the colored layer formed on the viewing side of the light-transmitting substrate can be visually recognized through the transparent resin layer. It is possible to provide a display panel having a metallic appearance and a deep dark and clear color and having a high-quality appearance quality.

  Even if the light-transmitting substrate is made of a soft material such as plastic, even if scratches occur in the manufacturing process of the light-transmitting substrate, or even if the substrate is damaged by chemicals, these scratches will not be Invisible, aesthetics and appearance quality are improved, yield is improved, and inexpensive products can be provided.

Furthermore, even if a colored resin layer is provided or wrinkles of the coating such as so-called yuzu skin occur, this is not visually recognized, and neither the aesthetic appearance nor the appearance quality is deteriorated.
Also, for example, when a decorative member such as a time letter is formed on the upper surface side of the light-transmitting substrate, the shadow of the decorative member is hardly visible, the texture of the plastic display board disappears, and the sense of quality may be lacking. Absent.

  Furthermore, when the transparent resin layer is smoothed by the smoothing process to form a smooth surface, the colored resin layer is present, so that the smooth transparent process does not damage the light-transmitting substrate and has a constant appearance quality. Can be held.

  Further, according to the present invention, when the display board of the present invention is used as a display board for equipment such as a clock display board, a desk calculator, an automobile, an instrument panel of an airplane, a mobile phone, etc. In particular, when used in a solar-powered wristwatch or the like, it is possible to supply a sufficient amount of light for power generation of the solar cell so that the solar cell crosshairs and dark purple are not visible.

In addition, design variations can be improved and thickness can be reduced, such as the expression of a three-dimensional uneven pattern with depth.
In addition, there is a display panel with a high-class appearance quality, which has a high-quality texture with a deep depth, a metallic feeling similar to that of a metal display board, and a clear color with whiteness and deep dark color. Equipment can be provided.

Furthermore, since the display board of the present invention can be used as a display board for devices such as solar-powered wristwatches, battery replacement or the like is unnecessary, contributing to resource saving.
In addition, the display board itself uses a light-transmitting substrate made of a synthetic resin such as polycarbonate, a colored resin layer, and a transparent resin layer, and does not use metal, heavy metal, etc., so it is environmentally friendly when recycling. A display board can be provided.

In the present invention, since the diffuse reflection portion (pattern) is located below the colored layer, the diffuse reflection light of the diffuse reflection portion (pattern) becomes colored, the texture is improved, and the diffused light on the viewing side surface Is reduced, and the dark color is recognized as a dark color, which is advantageous for obtaining a display panel with a dark color and a metal-specific texture, and the diffuse reflection part (pattern) is air (refractive index). 1) To provide a display panel that has a high reflectivity of the diffuse reflection part (pattern) and is easy to visually recognize, overflows with a sense of quality with a metallic feeling, and can expand design variations. it can.

FIG. 1 is a partially enlarged cross-sectional view of an embodiment of a display panel of the present invention. FIG. 2 is a schematic view for explaining a manufacturing process of the display panel of FIG. FIG. 3 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 4 is a partially enlarged cross-sectional view of a display panel according to another embodiment of the present invention. FIG. 5 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 6 is a partially enlarged cross-sectional view of a display panel according to another embodiment of the present invention. FIG. 7 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 8 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 9 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 10 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 11 is a perspective view for explaining the outline of the reflective polarizing plate in the present invention. FIG. 12 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 13 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 14 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 15 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention. FIG. 16 is an exploded perspective view in which the display board of the present invention is applied to a wireless function watch. FIG. 17 is a partial cross-sectional view taken along line AA in a state in which the wireless function watch of FIG. 16 is assembled. FIG. 18 is a diagram showing a general solar cell. FIG. 19 is a schematic cross-sectional view showing a conventional display panel. FIG. 20 is a schematic cross-sectional view showing a conventional display panel. FIG. 21 is a schematic sectional view showing a conventional display panel. FIG. 22 is a schematic view showing the operation of the conventional display panel of FIG. FIG. 23 is a schematic cross-sectional view showing a conventional display panel. FIG. 24 is a schematic view showing the operation of a conventional display panel.

Hereinafter, embodiments (examples) of the present invention will be described in more detail with reference to the drawings.
In addition, in each following Example, the same reference number is attached | subjected about the same structural member, The detailed description is abbreviate | omitted.

FIG. 1 is a partially enlarged cross-sectional view of an embodiment of a display panel of the present invention, and FIG. 2 is a schematic diagram for explaining a manufacturing process of the display panel of FIG.
In FIG. 1, the code | symbol 10 has shown the display board of this invention on the whole.

  In the first embodiment shown in FIG. 1, although not shown, the display plate 10 is formed with a shaft hole through which a needle shaft for driving the minute hand and the hour hand is inserted in the central portion thereof, on the upper surface side of the display plate 10. As appropriate, for example, indicator members such as numbers, typesetting, precious stones, electroformed time letters, time letter printing, cut printing, name printing, and a luminescent coating layer are disposed. Although the cells are selectively integrated, these members and the like are omitted for convenience of explanation (the same applies to the following embodiments).

The display panel 10 of Example 1 includes a light-transmitting substrate 12 having a light-transmitting property, and a colored resin layer 14 is formed on the viewing side (that is, the upper surface side) of the light-transmitting substrate 12. Yes.
And the transparent resin layer 16 is formed in the visual recognition side of the colored resin layer 14, This transparent resin layer 16 has the smooth surface 18 smooth | blunted by the smoothing process.

A light diffusion portion 21 is formed on the surface of the light transmissive substrate 12 opposite to the viewing side (that is, the lower surface side).
Below, the method to manufacture the display board 10 of such a structure is demonstrated based on FIG.

First, as shown in FIG. 2A, such a light transmissive substrate 12 is prepared.
A light diffusing portion 21 is formed in advance on the surface opposite to the viewing side (that is, the lower surface side) of the light transmissive substrate 12, and the light diffusing portion 21 is a minute one having a light diffusing action. It is formed by the uneven portion 23.

  In this case, the concavo-convex portion 23 may be subjected to diffusion printing using, as a diffusion layer, a coating film in which diffusion particles such as silicon oxide powder are dispersed in a resin such as a transparent acrylic resin, epoxy resin, or urethane resin. Alternatively, it can be easily manufactured by finishing the mat by integral molding.

  Further, the pattern may be formed by the uneven portion 23, and the shape of the pattern is not particularly limited, but from a circle, a spiral, a stripe, a radial shape, a grain, a satin, a stone tone, a geometric pattern What is necessary is just to comprise from the selected at least 1 pattern.

  On the other hand, the material of the light transmissive substrate 12 is not particularly limited, and resin (including a molded plastic material), glass, sapphire glass, ceramic, and the like can be used.

  Examples of the resin include transparent polycarbonate resin, acrylic resin, polyacetal resin, ABS resin, polyethylene resin, polypropylene resin, polystyrene resin, polyethylene terephthalate resin, alkyd resin, vinyl chloride resin, polyurethane resin, polyester resin, fluorine It can form from at least 1 sort (s) of resin selected from type | system | group resin.

  In this case, the thickness of the light-transmitting substrate 12 is not particularly limited depending on the use of the display board 10, but when used as a display panel for a solar watch, the strength of the display board and light transmission Considering the rate and the like, it is desirable that the thickness is 200 to 1500 μm, preferably 300 to 800 μm.

Next, as illustrated in FIG. 2B, the colored resin layer 14 is formed on the viewing side (that is, the upper surface side) of the light transmissive substrate 12.
In this case, the method for forming the colored resin layer 14 is not particularly limited, but may be formed by printing, painting, dry plating, or the like.

  In this embodiment, in order to produce a deep color, a blue pigment is mixed with a resin and formed by a printing method. The reason why the blue pigment is used is that, when the display panel 10 of the present invention is used as a display panel for a watch, a metallic feeling similar to that of a metal display board or a vivid color with a deep dark color can be obtained. This is because the display panel has a certain appearance quality.

In addition, in this colored resin layer 14, when it is desired to give other colors, pigments or dyes of other colors may be used.
In addition, for example, a very thin film may be formed by plating, printing, painting, electrodeposition, sputtering, vapor deposition, or the like, and the colored resin layer 14 may be colored. Is preferred.

  In this case, when the thickness of the colored resin layer 14 is increased, a deep color appears but the light transmittance is deteriorated. Therefore, when used as a display plate for a solar timepiece, it is desirable that the thickness is 1 to 50 μm, preferably 3 to 30 μm, considering light transmittance and the like. The colored resin layer 14 may reduce the light transmittance to 0.5 to 50%, preferably 10 to 30%.

Although not shown, the adhesion with the colored resin layer 14 may be improved on the surface on the upper surface side of the light transmissive substrate 12 in advance by primer treatment, rough surface treatment, or the like.
Then, as shown in FIG. 2C, after forming the colored resin layer 14 on the viewing side of the light transmissive substrate 12, the transparent resin layer 16 is formed on the viewing side of the colored resin layer 14.

In this case, the transparent resin layer 16 is not particularly limited, but a clear coat which is a transparent or translucent synthetic resin layer can be used.
Examples of such clear coats include polyurethane resin paints, fluorine resin paints in which fluorine is mixed in polymer molecules forming the resin, vinyl chloride sol paints in which polyvinyl chloride resin is dispersed in a plasticizer, and oil-free polyester resins. Silicone polyester resin paint composed of silicone polyester resin modified with silicone intermediate, or oil-free polyester resin paint, acrylic resin paint, epoxy resin paint, silicone acrylic resin paint, vinyl chloride resin paint, lacquer, phenol resin paint, A chlorinated rubber-based paint can be employed.

Moreover, the ink based on the above-mentioned various resins can be used as a clear coat.
In this case, the method for forming the transparent resin layer 16 on the viewing side of the colored resin layer 14 is not particularly limited, and for example, it can be formed by printing, spin coating, or painting.

  In this case, when the film thickness of the transparent resin layer 16 is increased, the light transmittance is deteriorated. Moreover, when the film thickness of the transparent resin layer 16 is reduced, the colored resin layer 14 existing below is damaged when the surface of the transparent resin layer 16 is subjected to a smoothing process, as will be described later. In this case, the polishing becomes excessive and the quality deteriorates.

Further, when the film thickness of the transparent resin layer 16 is increased, the reflectance is lowered and the dark color is lowered.
Therefore, when used as a display panel for a solar timepiece, it is desirable to set the thickness to 1 to 200 μm, preferably 5 to 100 μm in consideration of light transmittance, light reflectance, smoothing processing, and the like.

  If the thickness of the transparent resin layer 16 is in such a range, the transparent resin layer 16 remains and the colored resin layer 14 is damaged when the smooth surface 18 is formed by smoothing the transparent resin layer 16. There is no, and can maintain a certain appearance quality.

Next, as shown in FIG. 2D, after the transparent resin layer 16 is formed on the viewing side of the colored resin layer 14, the smoothed smooth surface 18 is formed by a smoothing process.
In this case, the smoothing process is not particularly limited, but for example, at least one smoothing process selected from a mirror surface process, a spin coat process, a roll coat process, and a polishing process is desirable. Such a smoothing process improves both aesthetics and appearance quality.

The ratio of the thickness of the colored resin layer 14 to the thickness of the transparent resin layer 16 is 1: 200 to 50:
A range of 1 is desirable.
If the ratio between the thickness of the colored resin layer 14 and the thickness of the transparent resin layer is within such a range, the transparent resin layer remains and the colored resin layer remains even when the transparent resin layer is smoothed to form a smooth surface. Since the resin layer is present, a certain appearance quality can be maintained without damaging the light-transmitting substrate by the smoothing process.

In the display panel 10 of the present invention, it is desirable that the colored resin layer has a thickness of 1 to 50 μm and the transparent resin layer has a thickness of 1 to 200 μm.
If the thickness of the colored resin layer 14 and the thickness of the transparent resin layer 16 are within such a range, the transparent resin layer 16 remains even when the transparent resin layer 16 is smoothed to form a smooth surface. The colored resin layer 14 is not damaged, and a certain appearance quality can be maintained.

  In the display panel 10 of the present invention, the color of the colored resin layer 14 is the following conditional expression in the L * a * b * color system defined by JIS Z 8729:

It is desirable to satisfy any of the following conditional expressions.
If the color of the colored resin layer 14 is in such a range, an unprecedented deep and glossy high-quality texture, a metallic feeling similar to that of a metal display board, and a vivid color with a deep dark color can be obtained. A display panel having a high-quality appearance quality can be provided.

  If the ratio between the thickness of the light-transmitting substrate 12 and the combined thickness of the colored resin layer 14 and the transparent resin layer 16 is within such a range, when the smooth surface 18 is formed by smoothing the transparent resin layer 16. In addition, due to the rigidity of the light-transmitting substrate 12, the transparent resin layer 16 remains and the colored resin layer 14 is not damaged during the smoothing process. , Can maintain a certain appearance quality.

  Thus, by directly looking at the smooth surface 18 that is the surface of the display panel 10 that has been smoothly polished, the colored resin layer 14 formed on the viewing side of the light-transmitting substrate 12 through the transparent resin layer 16 is used. Since the reflected light will be visually recognized, a high-class appearance with a high-quality texture with a depth that is unprecedented, a metallic feeling similar to that of a metal display board, and white, deep and vivid colors. The display board 10 having quality can be provided.

In addition, the colored resin layer 14 can prevent the crosshairs and dark purple of the solar cell from being visible.
Further, even if the light-transmitting substrate 12 is a soft material such as plastic, it is not visible even if the light-transmitting substrate is damaged in the manufacturing process of the light-transmitting substrate, so that the yield is improved and an inexpensive product can be provided.

  Furthermore, since the colored resin layer 14 is also present when the transparent resin layer 16 is smoothed by the smoothing process to form the smooth surface 18, the light-transmitting substrate 12 is not damaged by the smoothing process. A certain appearance quality can be maintained.

Although not shown, the light transmissive substrate 12 may contain at least one of a colorant and a diffusing agent.
As described above, since the light-transmitting substrate 12 contains at least one of the colorant and the diffusing agent, the color variation can be expanded by the colorant and the diffusing agent. The darkness and brightness of the board 10 are improved, design variations are expanded, high-quality texture with a depth that has never existed before, a metallic feeling similar to that of a metal display board, whiteness, and vividness of a deep dark color It is possible to provide a display panel that can obtain a high quality and has a high-quality appearance.

  In addition, since the light-transmitting substrate contains at least one of a colorant and a diffusing agent, the thickness of the colored resin layer can be reduced accordingly, so that the thickness of the entire display panel can be reduced. A compact display board can be provided.

  In this case, the colorant is not particularly limited, and a pigment or a dye can be used, and the diffusing agent is not particularly limited. For example, granular / (powder), scaly, It has a needle-like shape, and silica, glass, resin, etc. are used.

Moreover, it is desirable that the colored resin layer 14 has a haze value of 1% or less to 70% or less.
If the haze value of the colored resin layer 14 is in such a range, the light diffusion action is reduced, the diffused light on the surface on the viewing side is reduced, and the dark color is recognized as a dark color. This is advantageous for obtaining a display panel having a metal-specific texture.

  In addition, a diffused light on the surface of the viewing side is reduced, light is diffused by the light diffusing part, the pattern of the light diffusing part is easy to see, overflowing with a sense of quality with a metallic feeling, and an expansion of design variations Can be provided.

  By configuring in this way, in the display panel 10 of the present embodiment, as shown in FIG. 1, the light diffusing portion 21 is formed on the surface opposite to the viewing side of the light transmissive substrate 12. As indicated by the arrow A in FIG. 1, the light is diffused by the light diffusion unit 21.

  As a result, the diffused light on the surface on the viewing side is reduced, and the diffusely reflected light passes through the colored resin layer 14 so that the dark color of the colored resin layer 14 is indicated by the arrow B in FIG. As described above, when the viewer recognizes a dark color, it is possible to obtain a display panel that is dark and has a metal-specific texture.

  In addition, there is provided a display board in which light is diffused by the light diffusing portion 21 and the pattern by the minute uneven portions 23 of the light diffusing portion 21 is easily visible, overflowing with a high-class feeling with a metallic feeling, and capable of expanding design variations. be able to.

  Further, as indicated by an arrow C in FIG. 1, since the light is specularly reflected on the smooth surface 18, by directly looking at the surface of the smoothly polished display panel, the depth and gloss of the conventional surface can be reduced. It is possible to provide a display panel having a high quality appearance and a high quality appearance, a metallic feeling similar to that of a metal display board, and a clear color with a deep dark color.

Further, the colored resin layer 14 can supply a sufficient amount of light for power generation of the solar cell, and structurally, since the distance from the upper surface of the solar cell to the lower surface of the colored resin layer 14 is separated,
The crosshairs and dark purple of the solar cell can be made invisible.

  Further, by directly viewing the surface of the display panel 10 that has been smoothly polished, the reflected light from the colored resin layer 14 formed on the viewing side of the light-transmitting substrate 12 is viewed through the transparent resin layer 16. Therefore, it is possible to provide a display panel having a high-grade appearance quality, which can obtain a high-quality texture with a deep depth, a metallic feeling similar to that of a metal display board, and a clear color with a deep dark color. it can.

  Moreover, the colored resin layer 14 can supply a sufficient amount of light for power generation of the solar cell, and the distance from the upper surface of the solar cell to the lower surface of the colored resin layer 14 is structurally separated. Crosshairs and dark purple can be made invisible.

  Further, even if the light-transmitting substrate 12 is made of a soft material such as plastic, even if a scratch occurs in the manufacturing process of the light-transmitting substrate, or even if the substrate is damaged by chemicals, these scratches are generated. Can not be seen, the aesthetics and appearance quality are improved, the yield is improved, and an inexpensive product can be provided.

Furthermore, even if the colored resin layer 14 is provided or wrinkles of the coating such as so-called yuzu skin occur, this is not visually recognized, and the appearance and appearance quality are not deteriorated.
In addition, when a decorative member such as a time letter is formed on the upper surface side of the light-transmitting substrate 12, for example, the shadow of the decorative member is difficult to be visually recognized, and the texture of the plastic display board disappears, resulting in lack of luxury. Nor.

  That is, in the display panel 10 of the present invention, as shown in FIG. 22, even when a decorative member 106 such as a time letter is formed on the upper surface side of the light-transmitting substrate 102, the shadow 108 of the decorative member 106 is formed. However, even if it is projected onto the colored resin layer 14 present on the lower surface side, the shadow 13 is difficult to see and does not lack a sense of quality.

  Further, when the transparent resin layer 16 is smoothed by the smoothing process to form a smooth surface, the colored resin layer 14 is also present, so that the light-transmitting substrate 12 is not damaged by the smoothing process. The appearance quality can be maintained.

FIG. 3 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

In the display panel 10 of this embodiment, as shown in FIG. 3, the transparent resin layer 16 is composed of a transparent resin layer 16 in which a plurality of laminated transparent resin layers 16a and 16b are laminated.
Thus, since the transparent resin layer 16 is comprised from the transparent resin layer 16 which laminated | stacked several lamination | stacking transparent resin layers 16a and 16b, the transparent resin layer 16 is comprised by these several lamination | stacking transparent resin layers 16a and 16b. When the smooth surface 18 is formed by smoothing the transparent resin layer 16, the transparent resin layer 16 remains and the colored resin layer 14 is not damaged, and a certain appearance quality can be maintained.

In this case, it is desirable that the hardness of the laminated transparent resin layer 16b on the upper layer side is larger than the hardness of the laminated transparent resin layer 16a on the lower layer side.
Thus, since the hardness of the laminated transparent resin layer 16b on the upper layer side is larger than the hardness of the laminated transparent resin layer 16a on the lower layer side, it is easy to perform a smoothing process to smooth the transparent resin layer 16 and form the smooth surface 18. Even during this smoothing process, the lower layer-side laminated transparent resin layer 16a remains, so that the colored resin layer 14 is not damaged, and a constant appearance quality can be maintained.

  In the case of this example, the plurality of laminated transparent resin layers 16a and 16b are two layers, but it is also possible to form a laminate of three or more layers.

FIG. 4 is a partially enlarged cross-sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

As shown in FIG. 4, the display panel 10 of this embodiment is composed of a colored resin layer 14 in which a plurality of laminated colored resin layers 14a and 14b are laminated.
Thus, since it is comprised from the colored resin layer 14 which laminated | stacked several laminated colored resin layers 14a and 14b, these several laminated colored resin layers 14a and 14b overlap, the variation of a design is expanded, A display panel having a high-quality appearance can be provided, with a high-quality texture that is not deep and glossy, a metallic feeling similar to that of a metal display board, and a clear color with a deep dark color.

In this case, the plurality of laminated colored resin layers 14a and 14b may have different colors or the same color.
In the case of this embodiment, the plurality of laminated colored resin layers 14a and 14b are two layers, but three or more layers may be laminated.

FIG. 5 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the embodiment 3 shown in FIG. 4, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

  In the display panel 10 of this embodiment, as shown in FIG. 5, at least one of the laminated colored resin layers 14a and 14b, and in this embodiment, the laminated colored resin layer 14a forms a pattern. Is provided.

  As described above, the pattern of the laminated colored resin layer 14a is raised, the design variation is expanded, the depth, glossy high-quality texture, and the metal feeling similar to that of the metal display board are not present. In addition, a clear and deep color can be obtained, and a display panel having a high-quality appearance can be provided.

  In this case, the shape of the pattern is not particularly limited, but may be composed of at least one pattern selected from a circle, a spiral, a stripe, a radial shape, a grain, a satin, a stone tone, and a geometric pattern.

In this case, the plurality of laminated colored resin layers 14a and 14b may have different colors or the same color.
The laminated colored resin layer 14 can be formed by printing such as screen printing, offset printing, pad printing, and the like.

FIG. 6 is a partially enlarged cross-sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

In the display panel 10 of this embodiment, as shown in FIG. 6, the matte part 15 is formed on at least a part of the smooth surface 18 of the transparent resin layer 16.
In this case, the matte portion 15 may be formed on the entire smooth surface 18 of the transparent resin layer 16.

  Further, a pattern may be formed by the matte part 15, and the pattern by the matte part 15 is not particularly limited, and for example, a circle, a spiral, a stripe, a radial pattern, a grained texture, a satin texture And at least one pattern selected from stone, geometric patterns.

  In this way, the matte portion 15 is formed on at least a part of the smooth surface by matte printing with an ink containing particles such as silica, matte treatment by surface roughening treatment, etc. Variations can be expanded.

FIG. 7 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

In the display board 10 of this embodiment, as shown in FIG. 7, a pattern 17 is formed on at least a part of the smooth surface 18 of the transparent resin layer 16.
Thus, by forming the pattern 17 on at least a part of the smooth surface 18, it is possible to expand design variations. In this case, the pattern 17 may be formed on the entire smooth surface 18 of the transparent resin layer 16.

  In this case, the method for forming the pattern 17 on the smooth surface 18 is not particularly limited. For example, when using a resist pattern as a mask, a water-soluble photoresist is coated on the upper surface of the smooth surface 18, After that, a resist film is formed by pre-baking, and a resist film is formed by applying a positive film or negative film with a predetermined pattern on the resist film, exposing it to light, developing, and burning. By performing sputtering, a pattern can be formed on a smooth surface, and the resist film can be peeled off with a stripping solution.

As other methods of the mask, a metal mask provided with a through hole pattern in a thin metal plate, a printing mask provided with a pattern by printing, and the like can be used.
In this case, the shape of the pattern 17 is not particularly limited, but may be composed of at least one pattern selected from a circle, a spiral, a stripe, a radial pattern, a grain, a satin, a stone tone, and a geometric pattern.

FIG. 8 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

In the display board 10 of this embodiment, as shown in FIG. 8, the outer peripheral portion of the display board 10 is fixed by a fixing member 22.
By comprising in this way, for example, the outer peripheral part of each surface is fixed by the fixing member 22 via an adhesive or an adhesive, so that the light transmissive substrate 12, the colored resin layer 14, and the transparent resin Although the adhesion between the layers 16 can be improved, a module display panel integrated with a solar cell can be provided, although not shown.

FIG. 9 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

  In the display panel 10 of this embodiment, as shown in FIG. 9, on the surface of the light diffusing portion 21 formed on the side opposite to the viewing side of the light transmissive substrate 12 (that is, the lower side in FIG. 9), A reflective transmission film 24 is formed.

  By forming the reflective transmissive film 24 on the surface of the light diffusing portion 21 in this way, the reflectance increases due to the specular reflection action of the reflective transmissive film 24, and the pattern of the light diffusing portion 21 is easily visible. It is possible to provide a display board that is rich in metal and has a high-class feeling and that can be used to expand design variations.

In this case, it is desirable that the reflective transmissive film 24 is a reflective transmissive film made of metal or metal oxide.
Thus, if the reflective transmission film 24 is a reflective transmission film made of metal or metal oxide, the specular reflection effect is improved, the reflectance is increased, the pattern of the light diffusion portion 21 is easily visible, and the metallic feel is improved. It is possible to provide a display board that has a sense of luxury and can be expanded in design variation.

  In this case, the metal constituting the reflective transmission film 24 is not particularly limited. For example, one or more kinds selected from gold, silver, copper, aluminum, nickel, magnesium, zinc, titanium, and silicon are used. It can be formed from a metal or an alloy of two or more metals selected from these metals.

  Further, the metal oxide, metal nitride, and metal oxynitride constituting the reflective transmission film 24 are not particularly limited, but examples of the metal oxide include zirconium oxide, niobium oxide, and titanium oxide. , And at least one metal oxide selected from iron oxide, tin oxide, silicon oxide, and aluminum oxide.

  The metal nitride can be formed from at least one metal nitride selected from, for example, zirconium nitride, niobium nitride, titanium nitride, iron nitride, tin nitride, silicon nitride, and aluminum nitride.

  Examples of the metal oxynitride include at least one metal oxynitride selected from zirconium oxynitride, niobium oxynitride, titanium oxynitride, iron oxynitride, tin oxynitride, silicon oxynitride, and aluminum oxynitride. Can be formed.

  The reflective transmission film 24 may be a thin film having a function of reflecting a part of the light and transmitting the other part of the light, for example, 100 to 3000 mm, preferably 500 to The thickness may be 1500 mm.

Further, it is desirable that the increase in the reflectance of the display panel by the reflective transmission film 24 is 4 to 80%.
Thus, if the increase in the reflectivity of the display panel by the reflective transmission film 24 is within such a range, the pattern of the light diffusing portion 21 is easily visible, overflowing with a sense of quality with a metallic feeling, and expansion of design variations. It is possible to provide a display board that can be made into a simple structure.

FIG. 10 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

  In the display panel 10 of this embodiment, as shown in FIG. 10, specular reflection is performed between the light transmitting substrate 12 and the solar cell 26 on the side opposite to the viewing side (that is, the lower side in FIG. 10). A light transmissive reflector plate 28 having an action is provided.

  In this way, by disposing the light transmissive reflecting plate 28 having a specular reflection action on the surface opposite to the viewing side of the light transmissive substrate 12, as shown by the arrow D in FIG. When viewed from the specular reflection angle of the reflection plate 28, the pattern is easily recognized by the specular reflection light, and at the other angles, the reflection is lost, the color becomes darker, and the metal has a specific texture. It is advantageous to obtain a display board, and it is possible to provide a display board that is easy to visually recognize a pattern, overflows with a high-class feeling with a metallic feeling, and can expand design variations.

  In this case, the light transmissive reflecting plate 28 is not particularly limited as long as it has a reflecting function as well as a light transmitting function. For example, a reflective polarizing plate or a transmissive reflecting plate is used. can do.

  In this case, for example, the product name “DBEF” manufactured by Sumitomo 3M Co. can be used as the reflective polarizing plate, and the reflective polarizing plate made of “DBEF” has a light reflection axis N as shown in FIG. The light of the linearly polarized light component having the vibration plane parallel to the light reflection axis N and the light of the linearly polarized light component having the vibration plane parallel to the light transmission axis M is reflected. Has the property of transmitting. Further, it has a characteristic of transmitting about 50% of light and reflecting about 50% of light.

As the value of the thickness t of the reflective polarizing plate, various types having a thickness of about 130 to 400 μm are commercially available and can be selected as necessary.
For example, if the surface of the reflective polarizing plate has an uneven shape such as emboss, interference fringes are formed when the solar cell 26 and the light transmissive reflecting plate 28 made of the reflective polarizing plate are disposed. It is also possible to prevent.

Further, the transmission type reflection plate is not particularly limited as long as it has both light transmission and reflection properties.
In this case, it is desirable that the increase in reflectance of the display panel by the light transmissive reflector 28 is 4 to 80%.

  Thus, if the increase in the reflectance of the display plate by the light transmissive reflecting plate 28 is within such a range, the pattern of the light diffusing portion 21 is easily visible, overflowing with a sense of quality with a metallic feeling, and design variations. A display board that can be enlarged can be provided.

FIG. 12 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

In the display board 10 of this embodiment, as shown in FIG. 12, the solar cell 26 is provided on the side opposite to the viewing side of the display board 10, and the surface on the viewing side of the solar cell 26 is smoothed by a smoothing process. The cell smooth surface 30 is provided.

  As described above, the surface on the viewing side of the solar cell 26 has the cell smooth surface 30 smoothed by the smoothing process, so that the specular reflectivity of the cell smooth surface 30 increases, and the light diffusion portion 21 increases. It is possible to provide a display board that is easy to visually recognize, is full of luxury with a metallic feeling, and can be expanded in design variation.

  In this case, the smoothing process for forming the cell smooth surface 30 is not particularly limited. For example, a metal having a high light reflectance such as chromium, nickel, aluminum, palladium, rhodium, or platinum is used. For example, an extremely thin metal film of 100 to 3000 mm, preferably 500 to 1500 mm, can be used by dry plating such as vapor deposition or ion plating. This reflective transmission film reflects a part of light. The thin film has a function of absorbing the other part of the light and transmitting the remaining light.

As described above, as another smoothing process, a liquid resin can be formed into a smooth resin film by spin coating or roll coating.
Further, by polishing the surface of the smooth resin film, a reflective transmission film having higher specular reflection can be obtained.

FIG. 13 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as the display board 10 of the embodiment 9 shown in FIG. 10 and the embodiment 10 shown in FIG. Reference numerals are assigned and detailed description thereof is omitted.

  In the display panel 10 of this embodiment, as shown in FIG. 13, specular reflection is performed between the light transmitting substrate 12 and the solar cell 26 on the side opposite to the viewing side (that is, the lower side in FIG. 10). A light transmissive reflector plate 28 having an action is provided. And the surface by the side of visual recognition of solar cell 26 has cell smooth surface 30 smoothed by smoothing processing.

  By configuring in this way, when viewed from the angle at which the light-transmitting reflecting plate 28 is specularly reflected, the pattern is easily visible by the specularly reflected light, and at the other angles, there is no reflection, and more Providing a display board that is dark and advantageous for obtaining a display board with a metal-specific texture, and that allows the pattern to be easily seen, overflowing with a sense of quality with a metallic touch, and to expand design variations. be able to.

  Furthermore, the specular reflection effect of the cell smooth surface 30 increases the specular reflectivity, the pattern of the light diffusing portion 21 is easy to be visually recognized, a high-class feeling with a metallic feeling, and an increase in design variation. be able to.

FIG. 14 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

  In the display panel 10 of this embodiment, as shown in FIG. 14, specular reflection is performed between the light transmitting substrate 12 and the solar cell 26 on the side opposite to the viewing side (that is, the lower side in FIG. 14). A reflective polarizing plate 34 is disposed as a light transmissive reflecting plate having an action.

In this case, for example, the product name “DBEF” manufactured by Sumitomo 3M may be used as the reflective polarizing plate 34. As shown in FIG. 11, the reflective polarizing plate made of “DBEF” has a light reflection axis. The linearly polarized light component having a vibration plane parallel to the light reflection axis N and having a vibration plane parallel to the light reflection axis N is reflected and has a linear polarization component having a vibration plane parallel to the light transmission axis M. Light has the property of transmitting. Further, it has a characteristic of transmitting about 50% of light and reflecting about 50% of light.

As the value of the thickness t of the reflective polarizing plate 34, various types having a thickness of about 130 to 400 μm are commercially available and can be selected as necessary.
Further, in the display board 10 of this embodiment, the print layer 14 is provided on the viewing side of the light transmissive substrate 12. The print layer 14 is not particularly limited, and a method for forming the print layer 14 is not particularly limited, but may be formed by printing, painting, dry plating, or the like.

  In this embodiment, in order to produce a deep color, a blue pigment is mixed with a resin and formed by a printing method. The reason why the blue pigment is used is that, when the display panel 10 of the present invention is used as a display panel for a watch, a metallic feeling similar to that of a metal display board or a vivid color with a deep dark color can be obtained. This is because the display panel has a certain appearance quality.

In this print layer 14, when it is desired to produce another color tone, other color pigments or dyes may be used.
The uneven portion 23 serves as a light diffusion portion 21 having a light diffusion function. Examples of the cross-sectional shape of the uneven portion 23 include a prism shape, a substantially semicircular shape, an elliptical shape, a square shape, and a rectangular shape.

  In addition, for example, a very thin film may be formed by plating, printing, painting, electrodeposition, sputtering, vapor deposition, or the like, and the printed layer 36 may be colored, which is appropriately selected according to the desired color tone. Is preferred.

  In addition, a reflective polarizing plate 34 can be used as the light transmissive reflecting plate. However, in addition to the reflective polarizing plate 34, the light transmissive reflecting plate may have both light transmittance and reflectivity. For example, there is no particular limitation.

In this case, it is desirable that the increase in the reflectance of the display plate by the light transmissive reflecting plate is 4 to 80%.
Thus, if the increase in the reflectance of the display plate by the reflective polarizing plate 34 is within such a range, the pattern of the light diffusing portion 21 is easy to be visually recognized, overflowing with a high-class feeling with a metallic feeling, and expansion of design variations. It is possible to provide a display board that can be made into a simple structure.

FIG. 15 is a partially enlarged sectional view of a display panel according to another embodiment of the present invention.
The display board 10 of this embodiment has basically the same configuration as that of the display board 10 of the first embodiment shown in FIG. 1, and the same reference numerals are given to the same components and the details thereof are described. The detailed explanation is omitted.

In the display panel 10 of this embodiment, as shown in FIG. 15, the light diffusing portion 21 is omitted on the surface opposite to the viewing side (that is, the lower surface side) of the light transmissive substrate 12.
Instead, in the display plate 10 of this embodiment, a reflective polarizing plate 38 is disposed as a light transmissive reflector on the side opposite to the viewing side of the light transmissive substrate 12 (that is, the lower side in FIG. 15). Similar to the light diffusing portion 21, a light diffusing portion 42 composed of minute concavo-convex portions 40 is formed on the surface opposite to the viewing side (that is, the lower surface side) of the reflective polarizing plate 38. Yes.

Further, on the viewing side of the light-transmitting substrate 12 (that is, the upper side in FIG. 15), the printed layer 4
4 is formed.
In this case, for example, the product name “DBEF” manufactured by Sumitomo 3M Co. can be used as the reflective polarizing plate 38. As shown in FIG. 11, the reflective polarizing plate made of “DBEF” has a light reflection axis. The linearly polarized light component having a vibration plane parallel to the light reflection axis N and having a vibration plane parallel to the light reflection axis N is reflected and has a linear polarization component having a vibration plane parallel to the light transmission axis M. Light has the property of transmitting. Further, it has a characteristic of transmitting about 50% of light and reflecting about 50% of light.

As the value of the thickness t of the reflective polarizing plate 34, various types having a thickness of about 130 to 400 μm are commercially available and can be selected as necessary.
Further, the light diffusing portion 42 composed of the minute concavo-convex portions 40 can be easily manufactured by performing mat finishing by, for example, hot pressing or integral molding. Moreover, the uneven | corrugated | grooved part 40 can also be formed by machining.

  In addition, a reflective polarizing plate 34 can be used as the light transmissive reflecting plate. However, in addition to the reflective polarizing plate 34, the light transmissive reflecting plate may have both light transmittance and reflectivity. For example, there is no particular limitation.

In this case, it is desirable that the increase in the reflectance of the display plate by the light transmissive reflecting plate is 4 to 80%.
Thus, if the increase in the reflectance of the display plate by the light transmissive reflecting plate is within such a range, the pattern of the light diffusing portion 21 is easily visible, overflowing with a sense of quality with a metallic feeling, and expansion of design variations. It is possible to provide a display board that can be made into a simple structure.

  Further, the pattern may be formed by the concavo-convex portion 40 and the shape of the pattern is not particularly limited. What is necessary is just to comprise from the selected at least 1 pattern.

  The print layer 44 is not particularly limited, and a method for forming the print layer 44 is not particularly limited, but may be formed by printing, painting, dry plating, or the like.

  In this embodiment, in order to produce a deep color, a blue pigment is mixed with a resin and formed by a printing method. The reason why the blue pigment is used is that, when the display panel 10 of the present invention is used as a display panel for a watch, a metallic feeling similar to that of a metal display board or a vivid color with a deep dark color can be obtained. This is because the display panel has a certain appearance quality.

In this print layer 44, when it is desired to produce other color tones, pigments or dyes of other colors may be used.
In addition, for example, a very thin film may be formed by plating, printing, painting, electrodeposition, sputtering, vapor deposition, or the like, and the printed layer 36 may be colored, which is appropriately selected according to a desired color tone. Is preferred.

The display board described in the above embodiments can be applied to a wireless function watch 150 as shown in FIGS.
As shown in FIG. 16, the watch case 156 is divided into a plurality of parts. In this embodiment, the watch case 156 is divided into a watch case body 152 and a turning ring 162.

In FIG. 16, reference numeral 164 denotes a waterproof packing for sealing between the back cover 154 and the watch case body 152 in a sealed state.
When the display panel of the present invention is used as a display panel (character board) in such a solar cell-driven timepiece with a wireless function, the design variation can be expanded particularly.

  That is, the display panel of the present invention supplies a sufficient amount of light for power generation of the solar cell when used in a solar cell-driven timepiece with a solar function as described above, and the crosshairs and dark purple of the solar cell are visible. Can be invisible.

  And the display board of this invention is comprised from the reflection-type polarizing plate formed from transparent polycarbonate resin, an acrylic resin, etc., a transparent reflection board, and a light-transmissive board | substrate, for example. Since these are non-conductive materials, the reception performance of the antenna 160 can be maintained high without interfering with radio wave reception, and the function as a wireless function watch can be secured.

  In the above wireless function watch, the wireless function watch having the dial ring 162 has been described. However, the wireless function watch can also be applied to a wireless function watch having no dial ring 162.

Further, the present invention can be applied to a normal wristwatch that does not have a solar cell 158 and a solar-powered wristwatch that has a solar cell and does not have a wireless function.
In the above-described embodiment, a radio wave clock having a wireless function for receiving a long-wave standard radio wave (carrier wave) including time information and correcting the time based on the time information has been described, but the display board of the present invention is applied. The structure of the wireless function watch can also be applied to a watch having wireless functions such as a personal computer communication function, a mobile phone function, and a non-contact IC card function.

  Furthermore, the present invention is applied to devices that use the display panel as a display plate for devices such as a display device for a clock, a desk calculator, an automobile, an instrument panel of an airplane, a mobile phone, and the like. Various modifications can be made without departing from the object of the present invention.

  In the present invention, the display board of the present invention can be used, for example, as a display board for devices such as a clock display board, a desk calculator, an automobile, an instrument panel of an airplane, a mobile device such as a mobile phone.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made without departing from the object of the present invention.

DESCRIPTION OF SYMBOLS 10 Display board 11 Decoration member 12 Light transmissive board | substrate 13 Shadow 14 Colored resin layer 14a, 14b Laminated colored resin layer 15 Matte part 16 Transparent resin layer 16a Laminated transparent resin layer 16b Laminated transparent resin layer 17 Pattern 18 Smooth surface 21 Light diffusion Part 22 fixing member 23 uneven part 24 reflective transmission film 26 solar cell 28 light transmissive reflector 31 cell smooth surface 34 reflective polarizing plate 36 printing layer 38 reflective polarizing plate 40 uneven part 42 light diffusion part 44 printing layer 100 display Board
102 light transmissive substrate 104 colored resin layer 106 decorative member 108 shadow 150 watch 152 watch case body 154 back cover 156 watch case 158 solar cell 160 antenna 162 ring 164 waterproof packing 200 display board 202 light transmissive substrate 204 groove 206 coating 208 Smooth surface 210 Paint film 300 Display board 302 Light transmissive substrate 304 Uneven portion 306 Intermediate layer 308 Transparent protective layer 310 Smooth surface 400 Display board 402 Light transmissive substrate 404 Diffuse reflection portion 404 Pattern 406 Paint film 408 Coating film

Claims (26)

A light transmissive substrate;
A light diffusing portion formed on the side opposite to the viewing side of the light transmissive substrate;
A display board comprising:   2. The display panel according to claim 1, wherein the transmissive substrate includes a colored region. A light transmissive substrate;
A light diffusing portion formed on the side opposite to the viewing side of the light transmissive substrate;
A transparent resin layer formed on the viewing side of the light transmissive substrate,
The light-transmitting substrate has a colored region;
The display panel, wherein the transparent resin layer has a smooth surface smoothed by a smoothing process.   The display board according to claim 1, further comprising a smooth surface smoothed by a smoothing process on a viewing side of the light transmissive substrate.   The display panel according to claim 2, wherein the colored region is a light-transmitting substrate having a color.   The display panel according to claim 2, wherein the colored region is a colored layer formed on a viewing side of the light transmissive substrate. A transparent resin layer formed on the viewing side of the colored layer;
The display panel according to claim 6, wherein the transparent resin layer has a smooth surface smoothed by a smoothing process.   The display panel according to claim 6, wherein the colored layer is a colored resin layer.   The display panel according to claim 1, wherein a reflective transmission film is formed on a surface of a light diffusion portion formed on a side opposite to the viewing side of the light transmissive substrate.   The display panel according to claim 9, wherein the reflective transmission film is a reflective transmission film made of metal, metal oxide, metal nitride, or metal oxynitride.   11. The display panel according to claim 9, wherein an increase in reflectance of the display panel by the reflective transmission film is an increase of 4 to 80%.   The display board according to claim 1, wherein a light transmissive reflecting plate is disposed on a side opposite to the viewing side of the light transmissive substrate.   The display panel according to claim 12, wherein an increase in reflectance of the display panel by the light transmissive reflector is an increase of 4 to 80%.   The display panel according to claim 9, wherein the reflective transmission film has a color tone close to that of the colored layer. The display panel according to claim 12, wherein the light transmissive reflector has a color tone close to that of the colored layer.   The display panel according to claim 2, wherein the colored region has a haze value of 1% or less to 70% or less. A solar cell is provided on the side opposite to the viewing side of the display board,
The display panel according to any one of claims 1 to 16, wherein a surface on the viewing side of the solar cell has a cell smooth surface smoothed by a smoothing process. In the L * a * b * color system defined by JIS Z 8729, the color of the colored region is expressed by the following conditional expression:

The display board according to claim 2, wherein any one of the conditional expressions is satisfied.   The display board according to claim 2, wherein the transparent resin layer is formed of a transparent resin layer in which a plurality of laminated transparent resin layers are laminated.   20. The display panel according to claim 19, wherein the transparent resin layer has an upper layer-side laminated transparent resin layer whose hardness is higher than that of the lower layer-side laminated transparent resin layer.   21. The display board according to claim 5, wherein the colored region is formed of a colored layer in which a plurality of laminated colored layers are laminated.   The display panel according to claim 21, wherein at least one of the laminated colored layers is provided so as to form a pattern.   The display panel according to claim 1, wherein the light-transmitting substrate contains at least one of a colorant and a diffusing agent.   The display board according to any one of claims 2 to 23, wherein a matte portion is formed on at least a part of the smooth surface.   The display board according to claim 2, wherein a pattern is formed on at least a part of the smooth surface.   26. The display board according to claim 1, wherein an outer peripheral portion of the display board is fixed by a fixing member.

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