JP2006214733A - Display plate structure for timepiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display plate structure for timepieces in which patterns and indices provided for a transparent substrate are clearly visually recognizable. <P>SOLUTION: The display plate structure 10 for timepieces is provided with a structure in which an optically transparent substrate 1; a colored layer 2; and a lusterless layer 3 are layered, and the surface of the optically transparent substrate 1 is provided with indices such as protrusion and recession patterns 1a; numeric characters; letters; and marks. The colored layer 2 is constituted of a transparent and colored resin coating or a metal coating. The lusterless layer 3 is constituted of a transparent resin coating in which at least one type of particulates 3b such as alumina, zirconia, and titania. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display panel structure of a timepiece having a solar cell, electroluminescence and the like.

  In general structures of conventional timepieces with solar cells, solar cells are arranged on the back surface of the dial in order to obtain much power generation efficiency. The dial is required to be at least semi-transparent in order to transmit sunlight, and the material is limited. At the same time, the original dark purple color tone of the solar cell is visually recognized through the dial, and the appearance quality is impaired. There was a problem.

  For this reason, in view of these problems, as a display plate used in a known solar cell timepiece, the timepiece display plate disclosed in Patent Document 1 below can be seen. The display board shown in this patent document 1 forms a metal thin film through which light can be transmitted on the surface of a resin substrate, and prevents visual recognition from the outside of a solar cell disposed under the display board. It has a light transmittance that causes at least power generation of the cell.

  The timepiece display plate disclosed in Patent Document 1 has a configuration in which a metal thin film is provided on the surface of a resin substrate, but the display plate having a configuration in which a metal thin film is provided on the surface of the resin substrate has a glossy gloss due to the metal thin film. Appears, and the problem that appearance calmness is impaired appears. As a surface finishing method for eliminating the glaring gloss on the surface of the display panel, the technique disclosed in Patent Document 2 below can be cited. The technique disclosed in Patent Document 2 has a configuration in which a metal thin film is formed on a surface of a resin substrate after the surface of the resin substrate is honed with glass beads to give the surface of the resin substrate a matte finish.

WO98 / 53373 Publication Japanese Patent Laid-Open No. 49-110380

  The display panel for a watch made by the techniques of Patent Document 1 and Patent Document 2 described above has a dark purple color of the solar cell disposed on the lower surface of the display panel so that it cannot be visually recognized, and is a glare of a metal thin film. The gloss is lost. However, on the other hand, the texture of the display board appears uneven and a new problem of lack of luxury is born. In addition, if the surface of the display board has a pattern (due to unevenness), the pattern is blurred by honing processing, and a necessary design expression cannot be obtained.

  The present invention solves the above-mentioned problems, obstructs the visual recognition of the solar cells arranged on the lower surface of the display board, and has a high-class feeling without changing the pattern on the display board surface, etc. even though it has a matte finish. Another object of the present invention is to provide a display panel structure for a watch which can be matte finished and can clearly express the pattern and color tone of the display panel surface even in color finishing.

  As a means for solving the above-mentioned problems, the timepiece display board structure according to claim 1 of the present invention is a timepiece display board, and the display board comprises a light-transmitting substrate, a colored layer, a glossy layer. The surface of the light-transmitting substrate is provided with at least one of a pattern, a number, a letter, and a mark.

  The timepiece display panel structure according to claim 2 of the present invention is characterized in that the light-transmitting substrate is made of at least one of resin, glass, and sapphire glass.

  In the timepiece display board structure according to claim 3 of the present invention, the colored layer is provided by at least one of printing means, painting means, dry plating means, and transfer means. It is what.

  The timepiece display panel structure according to claim 4 of the present invention is characterized in that the colored layer is made of a colored resin film or a metal film.

  In the timepiece display panel structure according to claim 5 of the present invention, the colored layer transmits a part of the incident light downward and reflects a part of the light. Is.

  The timepiece display panel structure according to claim 6 of the present invention is characterized in that the matte layer is formed of a transparent resin film when containing at least one fine particle of silica, alumina, zirconia, and titania. To do.

  In the display panel structure for a watch according to claim 7 of the present invention, the matte layer has a content of the fine particles of 10 with respect to 100% by weight of a transparent resin film (solid content) excluding the fine particles. It is characterized by being in the range of ˜30% by weight.

  Further, the timepiece display panel structure according to claim 8 of the present invention is characterized in that the fine particles contained in the matte layer have a particle diameter in the range of 1.0 to 5.0 μm. Is.

  The timepiece display panel structure according to claim 9 of the present invention is characterized in that a dispersing agent for dispersing the fine particles is added to the matte layer.

  According to claim 10 of the present invention, in the timepiece display board structure, the transparent resin paint and transparent resin ink containing the fine particles and forming the matte layer are acrylic resin, urethane resin, alkyd. It is a resin, an epoxy resin or a modified resin thereof.

  In the timepiece display board structure according to claim 11 of the present invention, the matte layer has a thickness in the range of 5 to 40 μm.

  Further, the timepiece display board structure according to claim 12 of the present invention is characterized in that a surface of the matte layer has a transparent resin coating layer having a smooth surface.

  The timepiece display plate structure according to claim 13 of the present invention is characterized in that the timepiece display plate is a dial plate, a parting plate or a dial ring.

  As an effect of the invention, the timepiece display panel structure of the present invention has a structure in which a light-transmitting substrate, a colored layer, and a matte layer are sequentially laminated, and a pattern, numbers, letters, marks are formed on the surface of the light-transmitting substrate. It takes a configuration with at least one of them. By adopting a configuration in which a colored layer is arranged on a light-transmitting substrate provided with patterns, numbers, letters, marks, etc., the shape outline of the patterns, numbers, letters, marks, etc. is destroyed by reflected light from the colored layers. It appears clearly on the display board. Further, by arranging the colored layer and the matte layer on the light-transmitting substrate, the dark purple color of the solar cell is erased and cannot be seen, and the color tone of the colored layer is visually recognized. Furthermore, a glossy and calm display appearance is obtained by the action of the matte layer. That is, a pattern with a color tone of a colored layer appears clearly, and a matte finish with a high-class feeling is made, and a display panel with a feeling of calmness is obtained. In addition, the timepiece display panel structure of the present invention can be obtained by combining various types of patterns, numbers, letters, marks, etc. provided on the surface of the light-transmitting substrate, and combinations of these types and color tone types of the colored layer. A lot of design variations can be increased.

  Further, the timepiece display panel structure of the present invention uses resin, glass, sapphire glass, or the like for the light-transmitting substrate. When resin is used, a light transmissive substrate can be easily formed by molding a pattern, numbers, characters, marks, etc. into an injection mold and transferring it from the mold. Even when glass is used, patterns, numbers, letters, marks, etc. can be easily formed by a chemical etching method. In any case, the material cost is low, the processing method is easy, and mass production is possible, so that it can be manufactured at a low manufacturing cost.

  In the timepiece display panel structure of the present invention, the colored layer is formed by printing means, painting means, dry plating means, transfer means, and the like. A colored layer can be formed by a screen printing method, a pad printing method, an offset printing method or the like using a colored resin ink as a printing means, and a colored layer by a spray coating method or the like using a colored resin paint as a coating means. Can be formed. As a transfer means, a colored layer can be formed by transferring a sublimable dye under heating and pressure while forming a transparent resin layer. In any case, the working method is simple and mass production can be performed, so that it can be formed at a low manufacturing cost. Further, since the dry plating means is a method of forming a thin metal film by a technique such as vacuum deposition, sputtering, or ion plating, coloring with a metallic feeling can be obtained. Further, the colored layer is composed of a colored resin film formed using a printing means, a painting means, a transfer means, etc. by blending a pigment or a dye with a resin, or a metal film formed using a dry plating means. Since the color resin film and the metal film have different color tones, a wide variety of colors can be obtained. Further, these colored layers transmit part of light and cause the solar cell to generate power. A sufficient amount of power generation can be obtained by transmitting the amount of light required for power generation by the solar cell.

In the timepiece display panel structure of the present invention, the matte layer is constituted by a transparent resin film in which at least one fine particle such as silica, alumina, zirconia, titania or the like is contained in a transparent resin paint or a transparent resin ink. . Silica (SiO ₂ ) is transparent and has a function of transmitting and dispersing light, and alumina (Al ₂ O ₃ ), zirconia (ZrO ₂ ), and titania (TiO ₂ ) have a slightly white color tone and emit light. Has the function of reflecting and dispersing. By dispersing fine powder particles of these materials in the transparent resin coating, the dark purple color tone of the solar cell is softened by the colored layer, and further, the color tone of the solar cell is erased by the light dispersion by the matte layer. End up. At the same time, the gloss is lost due to the dispersion of light and a matte state appears. The matte layer makes it possible to visually recognize a display appearance in which a glossy and calm feeling appears on the surface of the display panel. A coating film in which silica fine particles are dispersed in a transparent resin is transparent, and a coating film in which a small amount of fine particles such as alumina, zirconia, and titania is dispersed in a transparent resin appears almost transparent. Therefore, when a transparent resin film formed by dispersing fine powder particles of silica, alumina, zirconia, titania or the like is provided on the colored layer as a matte layer, the color tone obtained from the colored layer is slightly thinned. Appears on the display board. That is, the color tone of the colored layer can be displayed on the display board as it is.

  Further, fine particles such as silica, alumina, zirconia, titania and the like used for the matte layer are those having a particle size in the range of 1.0 to 5.0 μm, and 10 to 30% by weight with respect to 100% by weight of the transparent resin. It mix | blends and uses within the range. In the present invention, the mat layer is formed to a thickness of 5 to 40 μm. This thickness is a thickness at which a desired matting degree (state) can be obtained, and is within a range in which a required light transmittance can be obtained. The particle size of the fine particles is set in consideration of the layer thickness and light transmittance of the matte layer, the visual appearance of the shape contour such as patterns, numbers, letters and marks formed on the light transmissive substrate. When the particle size is larger than 5 μm, the fine particles pop out from the surface of the matte layer with a minimum layer thickness of 5 μm, and the appearance quality is very poor due to the appearance of irregularities due to the fine particles, so that a high-class feeling does not appear. On the other hand, when the particle size is smaller than 1.0 μm, the fine particles sink into the matte layer under the same blending weight, and the convexity of the fine particles to the surface disappears, the matte is thinned, and the desired matte state is obtained. Disappear. In addition, the reflected light radiated out of the colored layer is reduced, and the contours of patterns, numbers, letters, marks, etc. formed on the light-transmitting substrate do not appear clearly. The light transmittance is also affected by the amount of fine particles. When the compounding amount increases, the light transmittance deteriorates, and further, the reflected light emitted from the colored layer decreases, and the contours of patterns, numbers, letters, marks, etc. formed on the light-transmitting substrate appear clearly. Disappear. In the present invention, the upper limit of the amount is set to 30% by weight. On the other hand, if the amount of the fine particles is small, the light transmittance is increased, but on the other hand, the degree of matting is reduced and the desired matte state cannot be obtained. The lower limit of the amount is set to 10% by weight in the present invention.

  Further, the thickness of the matte layer is set under the condition that the particle diameter of the fine particles is in the range of 1.0 to 5.0 μm and the blending amount of the fine particles is in the range of 10 to 30% by weight with respect to 100% by weight of the transparent resin. Is formed to a thickness of 5 to 40 μm. This thickness is a thickness at which a desired matting degree (state) can be obtained, and is within a range in which a required light transmittance can be obtained. That is, when the thickness is less than 5 μm, glossiness appears and a satisfactory matte state cannot be obtained. On the other hand, when the thickness is larger than 40 μm, the light transmittance is low, which affects the power generation of the solar cell. In addition, shape outlines such as patterns, numbers, letters, marks, etc. do not appear clearly. Thus, by setting the particle diameter of the fine particles in the range of 1.0 to 5.0 μm, the blending amount in the range of 10 to 30% by weight, and the layer thickness of the matte layer in the range of 5 to 40 μm, The required light transmittance is obtained, the desired matte state is obtained, and a clear visual recognition of the shape contours of patterns, numbers, letters, marks, etc. is obtained. In recent years, solar cells having a light transmittance of 15% and a required power generation amount have been used. And under the conditions of the particle size of fine particles, the amount of fine particles, and the layer thickness of the matte layer shown above, the light transmittance exceeds the above 15%, and the content sufficiently satisfies the power generation amount of the solar cell. It has become.

  In addition, a dispersant is added to the matte layer in order to disperse fine particles of silica, alumina, zirconia, titania and the like well. By adding the dispersing agent, the fine particles are uniformly dispersed over the entire mat layer, and the matte state is not uneven and an overall uniform matte is obtained. Furthermore, uniformity in the light transmission state can be obtained by uniform dispersion of fine particles such as silica, alumina, zirconia, and titania.

  Further, acrylic resin, urethane resin, alkyd resin, epoxy resin or their modified resins are used for the transparent resin paint or transparent resin ink used for the matte layer. Acrylic resins, urethane resins, alkyd resins, epoxy resins or their modified resins are excellent in light resistance, moisture resistance, and heat resistance, and have the effect of ensuring quality maintenance over a long period of time.

  Further, the timepiece display panel structure of the present invention has a transparent resin coating layer having a smooth surface on the surface of the matte layer. By having a transparent resin coating layer with a smooth surface, the contours of patterns, numbers, letters, marks, etc. provided on the transparent substrate are clear, the color of the colored layer is bright and clear, and the matte state Brightness and cleanliness appear, and the feeling of calm and luxury is further increased. The transparent resin coating layer also serves as a protective film for the colored layer and the matte layer, and also exhibits an effect of protecting against damage.

  And, by adopting the clock display board structure of the present invention on the dial plate, parting plate, dial ring, etc., the dark purple of the solar cell is erased and cannot be seen, and the formed pattern, numbers, letters, marks, etc. The contour of the shape is clearly and brightly recognized with the color tone of the colored layer, and furthermore, a high-quality dial, parting plate, and turn-off ring with a preferable matte state can be obtained.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to FIG. FIG. 1 is an enlarged cross-sectional view of a main part of a display panel according to the best embodiment showing the timepiece display panel structure of the present invention. In FIG. 1, reference numeral 10 denotes a timepiece display board. Reference numeral 9 denotes a solar cell, which generates electricity with light that is disposed directly below the display panel 10 and transmits through the display panel 10. In recent years, the solar cell 9 has a very high photoelectric conversion efficiency, and a solar cell 9 having a power generation amount that is sufficiently satisfied if the light transmittance of the display panel 10 is about 15% has been used. The solar cell 9 has a deep purple color tone.

  The display panel 10 includes a light transmissive substrate 1, a colored layer 2 provided on the upper surface of the light transmissive substrate 1, and a matte layer 3 provided on the upper surface of the colored layer 2. The light transmissive substrate 1 is made of a transparent substrate, and an uneven pattern 1a is provided on the upper surface (surface) thereof. The concavo-convex pattern 1a is provided for the purpose of enhancing the decoration as a display board. The concavo-convex pattern 1a includes a lattice pattern, a stripe pattern, a circle pattern, an Asahikari pattern (radiant pattern), a satin pattern, a stitch pattern, and a piage cut. Various patterns such as patterns and geometric patterns can be selected. However, the present invention is not limited to the uneven pattern, and may be an indicator such as a number, a character, or a mark for display purposes. Moreover, what provided the objective of both the decoration and display combining a concavo-convex pattern and an index | index etc. may be sufficient. Further, the matte layer 3 is composed of a transparent resin 3a in which fine particles 3b that function as light dispersion are dispersed.

  The light transmissive substrate 1 is made of resin, glass or the like, and has a thickness of 300 to 500 μm. When the light transmissive substrate 1 is formed of a resin, the resin material to be used includes polycarbonate resin, polyimide resin, polyethylene resin, polypropylene resin, polyacetal resin, polystyrene resin, which are excellent in heat resistance, moisture resistance, and light resistance. A resin material such as an acrylic resin can be selected. These resins are pelletized and formed by an injection molding method using an injection mold and an injection molding machine. The concavo-convex pattern 1a formed on the upper surface of the light transmissive substrate 1 is formed by transferring from a mold. Even when an index such as a number, a letter, or a mark is formed, it can be formed by being transferred from a mold. When the light transmissive substrate 1 is formed of glass, glass such as soda glass, quartz glass, borosilicate glass, alkali glass, ordinary plate glass, or sapphire glass can be selected as the glass material to be used. When glass is used for the light transmissive substrate 1, the uneven pattern 1a formed on the upper surface is formed by a photomask or a photoetching method. A resist film is provided on the portion of the concavo-convex pattern to expose the portion to be a concave portion, and the concave portion is formed by etching the exposed portion with an etching solution. Finally, the concavo-convex pattern 1a is removed by removing the resist film. Is formed. Even when indicators such as numbers, letters, marks, etc. are formed, they can be formed by the same method. As an etchant, a mixed solution of 4000 g of hydrogen fluoride, 150 cc of sulfuric acid, and 1200 cc of water can be used.

  In the present embodiment, the colored layer 2 is composed of a colored resin film formed by using a printing means by mixing a transparent resin with a colorant such as a pigment or a dye. However, the colored layer 2 may be formed with a metal film exhibiting a metal color of a metal thin film formed by using a dry plating means. The colored layer 2 transmits part of light, reflects part of light, and absorbs part of light. The colored layer 2 is provided for the purpose of clearly revealing the shape outline of the uneven pattern 1a provided on the upper surface of the light-transmitting substrate 1, and for the purpose of reducing the dark purple color of the solar cell and enhancing the decorativeness. When the colored layer 2 is arranged on the concavo-convex pattern, a part of the external light is reflected from the colored layer, and the shape contour of the concavo-convex pattern can be clearly recognized by the reflected light. Further, the reflected light from the solar cell is transmitted through the colored layer 2 so that the dark purple color of the solar cell is softened, and the reflected light from the colored layer 2 is also added so that the color tone of the colored layer 2 appears strongly in the table. Become. Thereby, the uneven | corrugated pattern with the color tone of the colored layer 2 comes to be visually recognizable clearly. In addition, although some of the external light appears to be absorbed by the colored layer 2, some of the light passes through the colored layer 2 and enters the solar cell, causing the solar cell to generate power. Abundant color variations can be obtained by changing the color tone type of the colored resin film and the metal color type of the metal film constituting the colored layer 2, and the uneven pattern of the light-transmitting substrate 1. If combined with, the decorativeness is enhanced and a rich variety of decorations can be obtained.

  As the transparent resin used for the colored layer 2, an acrylic resin, a urethane resin, an alkyd resin, an epoxy resin or other thermosetting resin excellent in photo-denaturation property and moisture resistance, or a UV curable resin can be selected. . Coloring agents such as pigments and dyes are mixed into these resins to make paints or inks. Air spray coating methods, roll coater coating methods, spinner coating methods and other coating means, screen printing methods, pad printing methods, offset printing methods The colored layer 2 is formed using a printing means such as. It should be noted that known paint additives such as antifoaming agents, anti-settling agents, and UV absorbers may be added to the paints and inks mixed with the colorants as described above, if necessary. You may mix | blend in the range. The drying temperature and time of ink and paint using a resin other than UV curable resin are 60 ° C. to 150 ° C. for 30 minutes to 110 minutes. The temperature and time are appropriately set according to the type of the light-transmitting substrate 1 (type of resin), the type of ink, and the type of paint (type of resin, curing group).

  Since this colored layer 2 requires transparency, the blending amount of the pigment or dye colorant to be added and the thickness of the colored layer 2 to be formed are limited. The blending amount of the colorant is preferably 5 to 10% by weight, and the layer thickness is preferably 5 to 20 μm. Within this range, a sufficient amount of transmitted light necessary for power generation of the solar cell is obtained, and the contour of the uneven pattern 1a of the light-transmitting substrate 1 colored with a visible coloring degree is clearly visible. become able to.

Further, the colored layer 2 may be constituted by a metal film made of a metal thin film exhibiting a metal color using a dry plating means. As metal materials to be used, metals such as Au, Ag, Al, Cu, Co, Cr, Fe, In, Ni, Pd, Pt, Rh, Sn, and Ti can be selected, and two kinds of these metals can be selected. It is also possible to select an alloy metal composed of the above. For example, binary alloys include Au-Ag, Au-Cu, Au-Ni, Ag-Pd, Au-Al, Cu-Al, Au-Cr, Au-Co, Au-In, Pd-Ni, etc. The ternary alloys include Au—Cu—Pd, Au—Ag—Cu, Au—In—Co, and the like. Thus, by using a binary alloy or a ternary alloy, it is possible to obtain various metal colors that are not found in a single metal, and it is possible to expand variations in metal color tone. For example, in the case of Au—Ag, a yellow gold color is obtained, and in the case of an Au—Cu alloy, a red gold color is obtained. By using these metals, a colored thin film 2 made of a metal film can be obtained by forming a metal thin film by dry plating means such as vacuum deposition, sputtering, or ion plating. For example, if it is a vacuum evaporation method, the pressure at the time of vapor deposition in the chamber of a vapor deposition machine will be 1 * 10 < ^-6 > ^-5 * 10 < ^-5 > torr (1.33 * 10 < ^-4 > -6.65 * 10 < ^-3 > Pa). ) To form a metal film on the concavo-convex pattern 1 a of the light-transmitting substrate 1. The thickness of the metal coating here can be freely controlled by the deposition time. In addition, when forming the colored layer 2 with this metal coating, since the transparency is required, the thickness is limited to the range of 50 to 300 mm. When the thickness is within this range, a colored layer in which the metal color can be visually recognized is obtained, and a light transmittance in the range of 30 to 70% is obtained, which does not hinder the power generation of the solar cell.

The colored layer 2 can also be formed by a transfer means. For example, a transparent resin such as an acrylic resin, a urethane resin, an alkyd resin, or an epoxy resin is formed in advance on the concavo-convex pattern 1a of the light-transmitting substrate 1, and the sublimation dye formed on the transfer paper is heated on the transparent resin. The colored layer 2 colored with the sublimation dye can be obtained by transferring the film at a temperature of about 180 ° C. and a pressure of about 10 to 20 g / cm ² . When the sublimation dye is used, a very vivid color tone is obtained, and a high light transmittance is obtained.

In this embodiment, the matte layer 3 is constituted by a transparent resin film formed by mixing fine particles 3b made of silica (SiO ₂ ) with a transparent resin 3a. By dispersing the fine particles 3b made of silica in the transparent resin 3a, light is dispersed and the glossy gloss is erased and a matte state appears. And a feeling of calmness appears on the display board, and a high-class feeling appears. At the same time, the light reflected from the solar cell is dispersed to make the dark purple color disappear. Although transparent silica fine particles are used in the present embodiment, fine particles of alumina (Al ₂ O ₃ ), zirconia (ZrO ₂ ), titania (TiO ₂ ), or the like can be used. These fine particles have a slightly white-colored tone, but unless a very large amount is used, a highly transparent transparent resin film is obtained when dispersed in a transparent resin. Further, silica fine particles and fine particles such as alumina, zirconia, and titania may be mixed and used. Fine particles such as alumina, zirconia, and titania have a refractive index higher than that of the resin as in the case of silica and cause a remarkable light dispersion action, so that the same effect as silica is obtained. In addition, the effect of brightening the surface of the display panel by significant light dispersion can be obtained. Further, when the mat layer 3 is composed of a transparent resin film in which light-dispersed fine particles having high transparency are dispersed, the color tone of the colored layer 2 appears on the display plate without largely changing. Therefore, the uneven pattern 1a of the light-transmitting substrate 1 colored with the colored layer 2 can be displayed on the display plate without impairing the color tone.

  As the transparent resin 3a used for the matte layer 3, a thermosetting resin made of an acrylic resin, a urethane resin, an alkyd resin, an epoxy resin, or a modified resin thereof is used. Since these resins are excellent in light resistance, moisture resistance and heat resistance, the quality can be maintained in the long term. These resins are dissolved in an organic solvent having a boiling point of 160 ° C or lower, and further, fine particles such as silica, alumina, zirconia, titania, etc. are mixed to form a paint or ink, and an air spray coating method or roll coater coating is used. The matte layer 3 is formed using a coating means such as a method, a spinner coating method, or a printing means such as a screen printing method, a pad printing method, or an offset printing method. Organic solvents used for coating or ink formation include ketones such as methyl ethyl ketone (MEX), cyclohexanone, acetone and methyl isobutyl ketone, acetates such as butyl acetate, ethyl acetate and isopropyl acetate, and aromatics such as xylene and toluene. Group hydrocarbons and the like, and one or a combination of two or more of these solvents can be used. After the matte layer 3 is formed by a coating means or a printing means, the matte layer 3 is cured and used by heating at a temperature of 50 ° to 150 ° C for 30 to 60 minutes.

  The particle size and blending amount of fine particles such as silica, alumina, zirconia, and titania used for the mat layer 3 are the thickness, light transmittance, mat level, and uneven pattern of the light transmissive substrate 1. It is limited by the relationship such as how the shape contour of 1a is visually recognized. Further, the layer thickness of the matte layer 3 is also limited by the relationship between the degree of matting, the light transmittance, and the visibility of the shape contour of the concave-convex pattern 1 a of the light-transmitting substrate 1. In the present invention, the particle diameter of the fine particles is set within a range of 1.0 to 5.0 μm, and the blending amount of the fine particles is also within a range of 10 to 30% by weight with respect to 100% by weight of the transparent resin (solid weight). Set in. And the layer thickness of the matte layer 3 is also set to the range of 5-40 micrometers. First, the layer thickness of the mat layer 3 is set to 5 μm or more in order to obtain a desired mat level. This is because if the thickness is less than 5 μm, a desired matting degree cannot be obtained. This restricts the particle size of the fine particles to 5 μm or less. When the particle size of the fine particles is larger than 5 μm, the fine particles are projected from the surface of the mat layer 3 having a minimum layer thickness of 5 μm, the appearance of the fine particles appears, the appearance quality becomes very poor, and the high-class feeling does not appear. On the other hand, if the particle size of the fine particles is smaller than 1.0 μm, the fine particles sink into the matte layer, and the convexity of the fine particles to the surface disappears, the matte becomes thin, and a desired matte state cannot be obtained. Next, the blending amount of the fine particles, the light transmittance decreases as the blending amount increases, and the reflected light radiated from the colored layer 2 decreases, so that the uneven pattern 1a of the light-transmitting substrate 1 is reduced. The shape outline will no longer appear clearly. In the present invention, the upper limit of the amount is set to 30% by weight. On the other hand, if the amount of the fine particles is small, the light transmittance is increased, but on the other hand, the degree of matting is reduced and the desired matte state cannot be obtained. The lower limit of the blending amount is set to 10% by weight in the present invention. Further, the mat layer 3 is set to a maximum thickness of 40 μm while the particle size of the fine particles is set to 1.0 to 5.0 μm and the blending amount is set to 10 to 30% by weight. If it is thicker than 40 μm, the required light transmittance cannot be obtained. In addition, the contour of the uneven pattern 1a of the light transmissive substrate 1 does not appear clearly. In the present invention, the required light transmission is achieved by setting the particle size of the fine particles to 1.0 to 5.0 μm, the blending amount to 10 to 30% by weight, and the thickness of the mat layer 3 to 5 to 40 μm. Rate, a desired matte degree (state) is obtained, and the contour of the concavo-convex pattern 1a formed on the light-transmitting substrate 1 can be clearly seen.

  In addition, when a dispersant is added to disperse fine particles such as silica, alumina, zirconia, and titania in the mat layer 3, the fine particles are uniformly dispersed throughout the mat layer, and the matte state is uneven. Therefore, it is possible to obtain a uniform matte as a whole. Furthermore, uniformity in the light transmission state can be obtained by uniform dispersion of fine particles such as silica, alumina, zirconia, and titania. Dispersants include aliphatic polycarboxylic acids, polyester amine salts, polyether ester type anionic surfactants, polycarboxylic acid long chain amine salts, polyaminoamide and phosphoric acid salts, polyaminoamide and polyester acid salts. Examples thereof include salts, specially modified polyamides, phosphate ester surfactants, and acrylic polymers. The addition amount of the dispersant is 0.1 to 10% by weight, preferably 1 to 6% by weight, based on 100% by weight of the transparent resin.

  By taking the above configuration, the dark purple color of the solar cell is almost erased by the action of the colored layer 2 and the matte layer 3 and is not visually recognized. In addition, the concave and convex pattern provided on the light-transmitting substrate 1 and the indexes such as numbers, characters, and marks are clearly visible with the color tone of the colored layer 2 by the action of the colored layer 2. Further, the decorativeness is enhanced by the color tone of the colored layer 2 being imparted. Abundant color variations and abundant decoration variations can be obtained by combining the types of patterns provided on the light transmissive substrate 1 and the color tone types of the colored layer 2. In addition, a matte surface that feels lustrous and calm due to the action of the matte layer 3 is obtained, and a high-grade appearance appears on the display board. And the transmitted light amount which does not hinder the electric power generation of a solar cell can be obtained. Examples of the present invention will be described below, but the present invention is not limited to these examples.

  First, a timepiece display panel structure according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 2 shows an enlarged cross-sectional view of the main part of the display panel showing the display panel structure for timepiece according to the first embodiment of the present invention. As shown in FIG. 2, the display panel structure for a watch in Example 1 has a structure in which the display panel 20 is composed of a light-transmitting substrate 11, a colored layer 12, and a matte layer 13, which are sequentially laminated. Is taking. Here, the light-transmitting substrate 11 is made of a transparent polycarbonate resin having a thickness of 500 μm, and a fine uneven pattern 11a made of a satin pattern is provided on the upper surface (surface) thereof. The colored layer 12 is formed by a screen printing method using a colored ink formed by blending a blue pigment with a transparent urethane resin to a thickness of 5 to 10 μm. The matte layer 13 is formed by a screen printing method to a thickness of 8 to 15 μm using an ink formed by blending fine particles 13b made of silica with a transparent resin 13a made of acrylic resin as a binder. Although not shown, a solar cell is disposed on the lower surface side of the display panel 20.

  The light-transmitting substrate 11 is formed by an injection molding method using an injection mold and an injection molding machine by pelletizing a transparent polycarbonate resin. At this time, the fine concavo-convex pattern 11a which is a satin pattern provided on the upper surface of the light-transmitting substrate 11 is formed by a transfer method from a mold.

  The colored layer 12 is formed to a thickness of 5 to 10 μm by a screen printing method using an ink formed by blending 7% by weight of a blue pigment with a transparent urethane resin. The blending ratio of the pigment in the colored layer 12 and the thickness of the colored layer 12 are limited by the degree of coloring, the degree of visibility of the shape contour of the pattern provided on the upper surface of the light-transmitting substrate 11, the light transmittance, and the like. The When the pigment content was 5 to 10% by weight and the thickness of the colored layer 12 was 5 to 20 μm, a sufficient amount of transmitted light required for power generation of the solar cell was obtained and colored. The shape outline of the pattern of the light transmissive substrate 11 can be clearly seen. In Example 1, the colored layer 12 is formed as thin as 5 to 10 μm. This is because the satin pattern provided on the upper surface of the light-transmitting substrate 11 is made of fine irregularities, and is formed thin so that the fine textured satin pattern can be clearly seen. . Thus, it is preferable that the thickness of the colored layer 12 is appropriately set within the range of 5 to 20 μm in consideration of the size of the unevenness of the uneven pattern. In addition, the drying temperature and time of the colored layer 12 are performed at 80 ° C. for 30 minutes.

  The matte layer 13 is 15% by weight of fine particles 13b made of silica having an average particle size of 2 μm and a particle size of 1.0 to 5.0 μm on a transparent resin 13a made of acrylic resin (silica fine particles 15 with respect to 100 parts by weight of acrylic resin). (Parts by weight) A transparent ink formed by blending is used to form a thickness of 8 to 15 μm by a screen printing method. In Example 1, the blending amount of the silica fine particles is as small as 15% by weight, and the mat layer 13 is formed as thin as 8 to 15 μm. This is because the pattern provided on the upper surface of the light-transmitting substrate 11 is a satin pattern with minute irregularities, and in order to make this satin pattern with minute irregularities clearly visible, The matting layer 13 is formed slightly thin and the matte layer 13 is formed slightly thin. If the amount of silica fine particles is large or the matte layer is thick, the light dispersion of reflected light becomes significant, and the pattern shape does not appear clearly in the case of minute uneven patterns. Come. Thus, it is preferable that the compounding amount of the silica fine particles is appropriately set in the range of 10 to 30% by weight in consideration of the visibility of the pattern shape of the uneven pattern. Similarly, the thickness of the mat layer 13 is preferably set appropriately within a range of 5 to 40 μm in consideration of the visibility of the pattern shape of the uneven pattern. The matting layer 13 is dried at a temperature of 80 ° C. for 30 minutes.

  The watch display board 20 having the above-described structure is visually recognized in a matte state with a satin pattern colored pale blue under the action of the colored layer 12 and the matte layer 13. Furthermore, brightness appears in the matte satin pattern, and it becomes a display board that gives a sense of luxury with a calm feeling. In addition, the required amount of transmitted light required for power generation of the solar cell is obtained, and the power generation function is not affected at all. Further, the dark purple color of the solar cell is erased by the action of the colored layer 12 and the matte layer 13 and is not visually recognized.

  The light transmissive substrate 11 is formed by an injection molding method, and the colored layer 12 and the matte layer 13 are formed by a screen printing method. In any case, since the forming method is simple and the forming method is mass-productive, a display panel can be manufactured at a low manufacturing cost.

  In the first embodiment, the light transmissive substrate 11 is formed using a transparent polycarbonate resin. However, this is not limited to the polycarbonate resin, but is a polyimide resin, a polyethylene resin, a polypropylene resin, a polyacetal resin, a polystyrene resin, an acrylic resin. A resin material such as may be used. The colored layer 12 is formed by blending a blue pigment with a transparent urethane resin. However, the colored layer 12 is not limited to the urethane resin, and an acrylic resin, an alkyd resin, an epoxy resin, or a modified resin thereof may be used. It is. Moreover, although the transparent acrylic resin was used for the resin binder of the matte layer 13, this is not limited to an acrylic resin, and a urethane resin, an alkyd resin, an epoxy resin, or a modified resin thereof may be used. Is.

  Next, a timepiece display panel structure according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 3 shows an enlarged cross-sectional view of a main part of a display board showing a timepiece display board structure according to Embodiment 2 of the present invention. As shown in FIG. 3, the display panel structure for a watch in Example 2 has a structure in which the display panel 30 includes a light-transmitting substrate 21, a colored layer 22, and a matte layer 23, which are sequentially stacked. Is taking. The light-transmitting substrate 21 here is made of transparent glass having a thickness of 400 μm, and an uneven pattern 21a formed in a lattice shape is provided on the upper surface (surface) thereof. The colored layer 22 is formed of a colored ink formed by blending a white pigment with a transparent urethane resin by an air spray coating method to have a thickness of 10 to 15 μm. The matte layer 23 is formed by a screen printing method with a thickness of 10 to 15 μm using an ink formed by blending silica fine particles 23b1 and alumina fine particles 23b2 using a transparent resin 23a made of urethane resin as a binder. In FIG. 3, the alumina fine particles 23b2 are displayed in black so that the distinction between the silica fine particles 23b1 and the alumina fine particles 23b2 can be seen. Although not shown, a solar cell is disposed on the lower surface side of the display panel 30.

  The light transmissive substrate 21 is formed using transparent soda glass having a thickness of 400 μm. And the grid | lattice-like uneven | corrugated pattern 21a which provided the recessed part 20-50 micrometers deep in the upper surface of glass, ie, the lattice pattern, is formed. This lattice pattern is formed by a photomask or photoetching method. A resist film is provided on a portion that becomes a convex portion of the lattice pattern, a portion that becomes a concave portion is exposed, and the concave portion is formed by etching the exposed portion with an etching solution. The etching solution is a mixed solution of 4000 g of hydrogen fluoride, 150 cc of sulfuric acid, and 1200 cc of water. Finally, an uneven lattice pattern is formed by removing the resist film.

  The colored layer 22 is formed to a thickness of 10 to 15 μm by a spray coating method using air spray using a white paint produced by blending 10% by weight of a white pigment with a transparent urethane resin. Thereby, the lattice pattern of the light-transmitting substrate 21 is colored white. In addition, the drying temperature and time of the colored layer 22 are performed at 120 ° C. for 30 minutes.

  The matte layer 23 is composed of a urethane resin transparent resin 23a, 5% by weight of silica particles 23b1 having a particle size of 1.0 to 5.0 μm and an average particle size of 2.0 μm, and a particle size of 1.0 to 5.0 μm. Is formed to a thickness of 10 to 15 μm by a screen printing method using an ink produced by blending 15% by weight of alumina fine particles 23b2 having an average particle diameter of 1.5 μm. Therefore, the total amount of silica fine particles 23b1 and alumina fine particles 23b2 is 20% by weight (a ratio of 20% to 100% by weight of urethane resin (weight of solid content)). Further, the upper surface of the mat layer 23 is a flat surface.

  In the matte layer 23 in Example 2, two kinds of light dispersants, alumina fine particles 23b2 and silica fine particles 23b1, are mixed and dispersed at a weight ratio of 75%: 25%. Since the silica fine particles significantly generate light dispersion, the degree of matting can be increased by mixing the silica fine particles. Further, the matte layer 23 formed by mixing two kinds of fine particles of alumina fine particles 23b2 and silica fine particles 23b1 with a transparent resin is very transparent, and can be visually recognized without impairing the color tone of the colored layer 22. It becomes like this. The matting layer 23 is dried at 120 ° C. for 30 minutes.

  The display panel 30 having the above-described display panel structure is visually recognized with the lattice pattern colored in white of the light-transmitting substrate 21 by the reflected light from the colored layer, leaving its shape outline, and further, the matte layer The lattice pattern matted by 23 appears on the display board with brightness. And it has a sense of calm and a sense of luxury. Naturally, the dark purple color of the solar cell is erased by the action of the colored layer 22 and the matte layer 23 and is not visually recognized.

  In the second embodiment, soda glass is used for the light-transmitting substrate 21, but it is possible to use glass such as quartz glass, borosilicate glass, alkali glass, ordinary plate glass, and sapphire glass instead of soda glass. There is no hindrance. Moreover, although the transparent urethane resin was used as the binder for the colored layer 22 and the matte layer 23, it is not particularly limited to the urethane resin, and an acrylic resin, an alkyd resin, an epoxy resin, or a modified resin thereof is used. It doesn't matter.

  In Example 2, alumina fine particles were used as one of the light dispersants constituting the matte layer 23, but the same effect can be obtained by using zirconia fine particles, titania fine particles or the like instead of the alumina fine particles. Get. Moreover, even if the mat layer 23 is formed using any one of alumina fine particles, zirconia fine particles, and titania fine particles, the same effect is produced.

  Next, a timepiece display panel structure according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 4 shows an enlarged cross-sectional view of a main part of a display board showing a timepiece display board structure according to Embodiment 3 of the present invention. As shown in FIG. 4, the display panel structure for a watch in Example 3 has a structure in which the display panel 40 includes a light-transmitting substrate 31, a colored layer 32, and a matte layer 33, which are sequentially stacked. Is taking. Here, the light-transmitting substrate 31 is made of a transparent acrylic resin having a thickness of 500 μm, and the upper surface (front surface) is provided with an Asahi light pattern in which the uneven patterns 31a are radially provided. The colored layer 32 is composed of a metal film in which a silver metal thin film and a gold metal thin film are laminated. The matte layer 33 is formed by a screen printing method to a thickness of 10 to 20 μm using an ink formed by blending silica fine particles 33b with a transparent resin 33a made of acrylic resin as a binder. Although not shown, a solar cell is disposed on the lower surface side of the display board 40.

  Here, the light-transmitting substrate 31 is formed by an injection molding method using an injection mold and an injection molding machine by pelletizing a transparent acrylic resin. At this time, the concavo-convex pattern 31a which is an Asahi pattern provided on the upper surface of the light-transmitting substrate 31 is formed by a transfer method from a mold.

The colored layer 32 is composed of a 200-thick metal film in which a 100-thick silver metal thin film and a 100-thick gold metal thin film are laminated. First, a 100 mm thick silver metal thin film is formed on the Asahi pattern on the light-transmitting substrate 31, and then a 100 mm thick gold metal thin film is formed on the silver metal thin film to form a two-layer metal film. It has become. The 100-thick silver metal thin film and the 100-thick gold metal thin film can be formed by a dry plating method such as vacuum deposition, sputtering, or ion plating. The colored layer 32 in Example 3 is formed by a vacuum deposition method. A light transmissive substrate 31 is mounted on a mounting table in a vapor deposition machine, and vapor deposition is performed at a pressure of 1 × 10 ⁻⁵ torr in a vapor deposition chamber to form a vapor deposition thin film having a thickness of 100 mm. Yes. Since the deposited film thickness can be freely set by managing the deposition time, the thickness can be managed accurately. A 200 mm thick metal film obtained by laminating a 100 mm thick silver metal thin film (transmittance: about 50%) and a 100 mm thick gold metal thin film (transmittance: about 60%) has a light transmittance of about 30%. A light golden color tone is obtained.

  The matte layer 33 is composed of 15% by weight of silica fine particles 33b having a particle diameter of 1.0 to 5.0 μm and an average particle diameter of 2.0 μm in an acrylic transparent resin 33a (silica fine particles with respect to 100 parts by weight of acrylic resin). (The ratio of 15 parts by weight) The ink formed by blending is formed to a thickness of 10 to 20 μm by a screen printing method. The matting layer 33 is dried at 80 ° C. for 30 minutes.

  On the display board 40 having the above-described structure, an Asahi light pattern colored in a thin gold color and matted appears. A feeling of calmness due to matting appears, and a thin gold noble metal feeling also appears, giving a display panel that gives a high-class feeling. Brightness appears in the Asahi pattern due to the matte layer using silica fine particles. The dark purple color of the solar cell is erased by the action of the colored layer 32 and the matte layer 33 and is not visually recognized.

  In Example 3, the light transmissive substrate 31 was formed using a transparent acrylic resin. This is not limited to forming the light-transmitting substrate 31 by using a resin such as a polycarbonate resin, a polyimide resin, a polyethylene resin, a polypropylene resin, a polyacetal resin, or a polystyrene resin. In addition to the Asahikari pattern, other patterns such as a lattice pattern, a stripe pattern, a circle pattern, a satin pattern, a stitch pattern, a piage cut pattern, a geometric pattern, and the like can be applied.

  In Example 3, the colored layer 32 is composed of a metal film composed of two layers of a silver metal thin film and a gold metal thin film. However, the color layer 32 is limited to a metal film composed of two layers of a silver metal thin film and a gold metal thin film. These may be one kind of metal film, or other metal films such as Al, Cu, Co, Cr, Fe, In, Ni, Pd, Pt, Rh, Sn, Ti, etc. There is no hindrance. Moreover, there is no problem even if it is an alloy metal film composed of two or more of these metals.

  Next, a timepiece display panel structure according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 5 is an enlarged cross-sectional view of a main part of a display panel showing a timepiece display panel structure according to Embodiment 4 of the present invention. As shown in FIG. 5, in the display panel structure for a watch in Example 4, the display panel 50 is composed of a light transmissive substrate 41, a colored layer 42, a matte layer 43, and a transparent resin coating layer 44. They have a stacked structure. Here, the light-transmitting substrate 41 is formed of a transparent polycarbonate resin having a thickness of 450 μm, and a stripe pattern having a concavo-convex pattern 41a is formed on the upper surface (surface) thereof. The colored layer 42 is formed by a screen printing method using a black ink produced by blending a black pigment with a transparent urethane resin and having a thickness of 10 to 20 μm. The matte layer 43 is formed by a screen printing method to a thickness of 10 to 20 μm using an ink formed by blending silica fine particles 43b with an acrylic transparent resin 43a as a binder. The transparent resin coating layer 44 is made of a transparent acrylic resin, has a layer thickness of 15 to 25 μm, and has a glossy surface by lapping. Although not shown, a solar cell is disposed on the lower surface side of the display panel 20.

  Here, the light-transmitting substrate 41 is formed by an injection molding method using an injection mold and an injection molding machine by pelletizing a transparent polycarbonate resin. At this time, the stripe pattern which is the stripe-shaped uneven pattern 41a provided on the upper surface of the light-transmitting substrate 41 is formed by a transfer method from a mold. The stripe-shaped unevenness is provided at almost equal intervals, and the unevenness is provided with a step of 20 to 30 μm.

  The colored layer 42 is formed with a thickness of 10 to 15 μm by a screen printing method using an ink formed by blending 5% by weight of a black pigment with a transparent urethane resin, and has a light transmittance of about 50%. have. The colored layer 42 is dried and cured for about 60 minutes at a temperature of about 80 ° C. after screen printing.

  The matte layer 43 is 15% by weight of silica fine particles 43b having a particle size of 1.0 to 5.0 μm and an average particle size of 2.0 μm in an acrylic transparent resin 43a (silica fine particles with respect to 100 parts by weight of acrylic resin). (The ratio of 15 parts by weight) The ink formed by blending is formed to a thickness of 10 to 20 μm by a screen printing method. The drying temperature and time are 80 ° C. for 30 minutes.

  The transparent resin coating layer 44 uses a transparent acrylic resin paint, forms a coating film with a thickness of 40 to 60 μm by an air spray coating method under an air pressure of about 3 atm, and then heats at 120 ° C. for 60 minutes. Apply the treatment to cure the coating. After that, the surface of the coating film is wrapped with a polishing machine to finish it as a glossy smooth surface. The coating thickness after lapping is finished in the range of 15 to 25 μm. The acrylic resin paint can be obtained by dissolving a solid acrylic resin in an organic solvent having a boiling point of 160 ° C. or lower, for example, an organic solvent such as acetone, xylene, toluene, etc. under heating.

  In the display board 50 having the above-described display board structure, reflected light of external light appears even though the colored layer 42 is formed of a black pigment, and thereby the stripe pattern of the light-transmitting substrate 41 is colored black. It becomes clearly visible. Further, the matte layer 43 in which the silica fine particles 43b are dispersed is matted, and a bright stripe pattern is clearly visible in the matte state. Further, under the action of the transparent resin coating layer 44 having a smooth surface provided on the upper surface of the matte layer 43, the stripe pattern appears bright and beautiful with a feeling of sinking and feeling of calmness. As a result, the stripe pattern colored in black is bright, clear, and clearly visible in a matte state, and there is a sense of sinking and calmness that gives a sense of further luxury. .

  Further, since the dark purple color of the solar cell has a color tone close to that of the colored layer 42 exhibiting black color, the black color of the colored layer 42 is noticeable and the dark purple color is erased. Will not be visible at all. Moreover, the setting value of the amount of black pigment in the colored layer 42 and the setting value of the layer thickness of the coloring layer 42, and the setting amount of the silica fine particle in the matting layer 43 and the setting value of the layer thickness of the matting layer 43 are required for the solar cell. Since the minimum transmittance is set within the range of the set value that can sufficiently obtain, the solar cell power generation is not hindered.

  In Example 4, the light-transmitting substrate 41 is formed of polycarbonate resin, but is not limited to polycarbonate resin, and resin such as polyimide resin, polyethylene resin, polypropylene resin, polyacetal resin, polystyrene resin, acrylic resin is used. There is no problem even if the light-transmitting substrate 41 is formed by using it. Further, for the uneven stripe pattern provided on the light-transmitting substrate 41, there is no problem even if other patterns such as a lattice pattern, a circle pattern, a satin pattern, a stitch pattern, a piage cut pattern, and a geometric pattern are selected. .

  Further, although the colored layer 42 is colored in a black color tone using a black pigment, this is not limited to black, and an optimal color pigment may be selected according to design specifications.

  In Example 4, the transparent resin coating layer 44 is formed using a transparent acrylic resin. However, this is not limited to an acrylic resin, and a resin such as a urethane resin, an alkyd resin, or an epoxy resin may be used. There is no hindrance.

  Next, a timepiece display board structure according to a fifth embodiment of the present invention and a timepiece dial formed using the display board structure will be described with reference to FIGS. 6A and 6B are a plan view and a cross-sectional view of a main part of a timepiece dial formed using the timepiece display plate structure according to the fifth embodiment of the present invention. FIG. 6A is a plan view, and FIG. b) shows a cross-sectional view of the main part. FIG. 7 is an enlarged view showing a portion A of FIG. 6B in an enlarged manner, and is an enlarged sectional view showing a timepiece display plate structure according to Embodiment 5 of the present invention. First, a timepiece dial plate 70 formed using the timepiece display plate structure according to the fifth embodiment of the present invention includes a timepiece display plate 60 and an upper surface of the timepiece display plate 60 as shown in FIG. It is formed at the upper center of the index 68 consisting of 12 indicators 67 indicating the time letters of 1 o'clock, 2 o'clock, 3 o'clock, ..., and 68 on the outer peripheral edge area And an index 69 indicating a pet name. The timepiece dial 70 has a hole 70b for attaching a pointer at the center thereof. Although not shown, a solar cell is disposed on the lower surface side of the dial 70.

  The twelve indicators 67 indicating the time characters are made of metal, and the surface thereof is gold-plated by electrolytic plating and has a glossy golden color tone. The upper surface of the display panel 60 is bonded and fixed to a predetermined position via an adhesive. The index 67 made of metal can be formed by a cutting method, a pressing method, an electroforming plating method, or the like. Further, the index 68 indicating the cut scale and the index 69 indicating the pet name are printed and formed on the upper surface of the display board 60 at predetermined positions by using a black ink and a pad printing method. The black ink is produced by blending a black pigment with a transparent urethane resin or acrylic resin.

  As shown in FIG. 7, the display panel 60 is composed of a light-transmitting substrate 51, a colored layer 52, and a matte layer 53, and the light-transmitting substrate 51, the colored layer 52, and the matte layer are formed from below. 53 and sequentially stacked.

  Here, the light transmissive substrate 51 constituting the display panel 60 is formed of a transparent polycarbonate resin having a thickness of 500 μm, and a pear texture pattern, which is a minute uneven pattern 51a, is provided on the upper surface (surface). The light-transmitting substrate 51 is formed by an injection molding method using an injection mold and an injection molding machine by pelletizing a transparent polycarbonate resin. At this time, a satin pattern, which is a minute uneven pattern 51a provided on the upper surface of the light-transmitting substrate 51, is formed by a transfer method from a mold.

The colored layer 52 is formed with a gold metal film having a thickness of 150 mm. The gold metal film having a thickness of 150 mm can be formed by a dry plating method such as a vacuum vapor deposition method, a sputtering method, or an ion plating method. In Example 5, the gold metal film is formed by a vacuum vapor deposition method. A light-transmitting substrate 51 is mounted on the mounting table in the vapor deposition machine, and vapor deposition is performed at a pressure of 1 × 10 ⁻⁵ torr in the vapor deposition chamber to form a 180 mm thick gold vapor deposition thin film. is doing. Since the deposited film thickness can be freely set by managing the deposition time, the thickness can be managed accurately. The 180 mm thick gold metal film has a light transmittance of about 50%, and a clear golden color tone appears.

  The matte layer 53 is 15% by weight of silica fine particles 53b having a particle size of 1.0 to 5.0 μm and an average particle size of 2.0 μm in an acrylic transparent resin 53a (silica fine particles with respect to 100 parts by weight of the acrylic resin). 15 parts by weight), and an ink produced by blending 5% by weight of the dispersant for the fine particles 53b (a ratio of 5 parts by weight of the dispersant with respect to 100 parts by weight of the acrylic resin), and 10 to 20 μm by screen printing. The thickness is formed. The matting layer 53 is dried at a temperature of 80 ° C. for 30 minutes.

  The fine particle dispersant uses 5% by weight of aliphatic polycarboxylic acid. Other dispersants include polyester amine salts, polyether ester type anionic surfactants, polycarboxylic acid long chain amine salts, polyaminoamide and phosphoric acid salts, polyaminoamide and polyester acid salts, and specially modified polyamides. , Phosphoric ester surfactants, acrylic polymers and the like, and these may be used. The addition amount of the dispersant is 0.1 to 10% by weight, preferably 1 to 6% by weight, based on 100% by weight of the transparent resin.

  The dial plate 70 having the above structure is clearly visible with the satin pattern of the light-transmitting substrate 51 colored in gold by the reflected light from the colored layer 52 made of a gold metal film. Further, the matte layer 53 in which the silica fine particles 53b and the fine particle dispersant are dispersed is matted, and the satin pattern 51a is evenly matte over the entire surface, and is brightly and clearly visible with a thin golden color tone. The In addition, the glossy gold color tone index 67 is arranged on the matte pattern surface with a thin gold color tone. A decoration with the appearance of is obtained and a sense of luxury appears. Further, since the index 68 indicating the cut scale and the index 69 indicating the pet name are black, the display clearly appears.

  Further, the deep purple color of the solar cell is not visible at all by the colored layer 52 and the matte layer 53 exhibiting gold.

  Next, a timepiece display panel structure according to Embodiment 6 of the present invention will be described with reference to FIGS. The watch display ring structure according to the sixth embodiment of the present invention is a watch turn ring that is regarded as a kind of display board (hereinafter, the display plate of the present invention in the sixth embodiment will be referred to as a turn ring). The structure of is shown. Here, the figure will be described. 8 is a cross-sectional view of the main part showing the configuration of the wristwatch, FIG. 9 is a perspective view of the main part of the dial ring in FIG. 8, and FIG. 10 is a cross-sectional view of the main part of the dial ring in FIG.

  First, the configuration of a wristwatch using the dial ring of the present invention will be briefly described with reference to FIG. As shown in FIG. 8, the dial plate 95 and the movement 96 are fixed inside the watch case 97 through the middle frame 99. The back cover 98 is attached and fixed to the back side of the watch case 97 so as to push up the inner frame 99. On the other hand, a cover glass 91 is fixed to the watch case 97 via a waterproof packing 92 on the front side of the watch case 97. Further, a dial ring 80 which is formed in the ring shape of the present invention in the outer peripheral area of the dial plate 95 inside the watch case 97, and a ring-shaped solar cell 89 disposed on the outer periphery of the dial ring 80, Is fixed by being sandwiched between a dial plate 95, an inner frame 99 and a watch case 97. Further, a wristwatch 100 is configured by inserting and attaching a pointer 94 such as a short hand or a long hand to a pointer shaft protruding from the movement 96 between the cover glass 91 and the dial plate 95. The wristwatch 100 has a structure in which light is collected from the dial ring 80 and light is incident on a solar cell disposed on the outer periphery of the dial ring to generate power.

  Next, as shown in FIG. 9, the facing ring 80 of the present invention has a ring shape, and the inner peripheral surface thereof is an inclined surface to constitute the facing surface 80b. An index 80a representing a cut scale is formed on the facing surface 80b. Here, the index 80a that forms the cut scale is displayed as Arabic numerals 80a1 every five minutes, 5, 10, 15,... 55, 60, and the cut between them is an oval mark 80a2. Is displayed. These Arabic numerals 80a1 and marks 80a2 are formed so as to protrude from the facing surface 80b.

  The facing ring 80 having the above-described shape has a structure shown in FIG. That is, it is composed of a light-transmitting substrate 71 formed in a ring shape, a colored layer 72 provided on the inner peripheral slope of the light-transmitting substrate 71, and a matte layer 73 provided on the colored layer 72. Thus, the inner peripheral inclined surface side where the colored layer 72 and the matte layer 73 are provided is a facing surface 80b.

  Here, the light-transmitting substrate 71 constituting the turn ring 80 is formed of a transparent acrylic resin, and has a ring shape with an inner periphery having a slope. Then, on the inner peripheral surface (where it corresponds to the turning surface 80b), a protruding portion 71b is formed in the center direction (the center of the ring shape) where a cut scale index 80a composed of Arabic numerals 80a1 and an oval mark 80a2 is formed. The projection 71b is mirror-finished on the surface of the projection 71b. Also, the surface of the inner peripheral slope other than the protruding portion 71b is formed with a satin pattern that is a minute uneven pattern 71a. The light-transmitting substrate 71 is formed by an injection molding method using an injection mold and an injection molding machine by pelletizing a transparent acrylic resin. At this time, the mirror finish of the surface of the protrusion 71b provided on the inner peripheral slope of the light-transmitting substrate 71 and the satin pattern 71a are formed by a transfer method from a mold.

Next, the colored layer 72 is made of a gold metal film having a thickness of 200 mm. The gold metal film can be formed by using a dry plating method such as a vacuum deposition method, a sputtering method, or an ion plating method, but the dial ring 80 of the present invention masks the upper surface, the lower surface, and the outer peripheral surface. Below, only the inner peripheral slope is exposed, and the colored layer 72 is formed by a vacuum deposition method. A masked light-transmitting substrate 71 is mounted on the mounting table in the vapor deposition machine, and the vapor deposition pressure in the vapor deposition machine chamber is set at a pressure of 1 × 10 ⁻⁵ torr. Forming. Since the deposited film thickness can be freely set by managing the deposition time, the thickness can be managed accurately. A 200-thick gold metal film has a light transmittance close to about 50% and a golden color tone. By providing the colored layer 72 made of this gold metal film, a glossy golden mirror surface is obtained on the surface of the projecting portion 71b which is the mirror surface where the index 80a is formed, and the matte surface other than the projecting portion 71b is matte. Can be obtained. Thereby, the protruding portion 71b where the index 80a is formed is clearly visible.

  The matte layer 73 comprises 15% by weight of silica fine particles 73b having a particle size of 1.0 to 5.0 μm and an average particle size of 2.0 μm on a transparent acrylic resin 73a (silica fine particles 15 with respect to 100 parts by weight of the acrylic resin content). (Parts by weight) The paint formed by blending is formed to a thickness of 5 to 15 μm by an air spray coating method. When the matte layer 73 having a thickness of 5 to 15 μm is provided, the matte layer 73 is relatively thin, so that the protrusion 71b where the index 80a is formed is colored with a gold color, leaving a gloss, The large shape of 200 μm overlaps and the shape outline of the protruding portion is clearly visible. Moreover, the surface of parts other than the protrusion part 71b is matted, and a matte pear ground with a pale (thin) golden color tone comes to be visually recognized. As a result, the indicator 80a configured with the protruding portion becomes conspicuously visible. The matting layer 73 is dried at 80 ° C. for 30 minutes.

  Masking is performed on the upper surface, the lower surface, and the outer peripheral surface of the light-transmitting substrate 71, and the colored layer 72 and the matte layer 73 are formed on the inner peripheral slope (the surface that becomes the turning surface 80b) that is not masked. Finally, by removing the masking, the turn ring 80 shown in FIGS. 9 and 10 is obtained. Masking can be achieved by applying masking tape or the like.

  The turn ring 80 in the sixth embodiment is formed of a gold metal coating on the colored layer 72, and the surface of the portion other than the index 80a is finished in a satin pattern surface. The decorative specification of the dial ring 80 is a decorative specification combined with the decorative specification of the dial plate 95 made of a metal plate. Accordingly, it is preferable to select a preferable specification for the decorative surface 80b of the counter ring 80 according to the decorative specification of the dial.

  Further, the dial ring 80 in the sixth embodiment is provided with an index indicating a cut scale, but the present invention is not limited thereto, and there is no problem even if other marks, characters, and the like are provided, and only a pattern is provided. But it is good.

  The turn ring 80 having the above structure is colored with a glossy gold color so that the indicator 80a is noticeable with a clear shape outline. In addition, the surface of the portion other than the index 80a is matted to give a satin textured surface with a light golden color tone, so that a feeling of calmness is obtained, and the overall feeling of precious metal gives a sense of luxury. A reversing ring is obtained. In addition, the same decoration as the dial is obtained, and the wristwatch gives a sense of luxury.

  In addition, since the amount of transmitted light necessary for power generation of the solar cell 89 is obtained, power generation is not hindered. At the same time, the dark purple color of the solar cell is erased by the colored layer 72 and the matte layer 73 which are gold and is not visible at all.

  In Example 6, the light-transmitting substrate 71 is formed of a transparent acrylic resin. However, this is not limited to an acrylic resin, and an alkyd resin, an epoxy resin, a urethane resin, or a modified resin thereof can be used. A resin may be used. Further, there is no problem even if a resin such as polycarbonate resin, polyimide resin, polyethylene resin, polypropylene resin, polyacetal resin, or polystyrene resin is used.

  In Example 6, the colored layer 72 is composed of a gold metal film. However, the colored layer 72 is not limited to the gold metal film, and may be composed of another metal film or a colored resin film. May be. The specification of the colored layer 72 is preferably set as appropriate according to the surface finish specification of the dial.

  As described above, the display panel structure of the present invention has been described in the case where a solar cell is provided. However, even when an electroluminescence (EL) is provided, it can be used in common. And the same effect can be acquired.

It is a principal part expanded sectional view of the display panel which concerns on the best embodiment which shows the display panel structure for timepieces of this invention. It is a principal part expanded sectional view of the display board which shows the display board structure for timepieces concerning Example 1 of this invention. It is a principal part expanded sectional view of the display board which shows the display board structure for timepieces concerning Example 2 of this invention. It is a principal part expanded sectional view of the display board which shows the display board structure for timepieces concerning Example 3 of this invention. It is a principal part expanded sectional view of the display board which shows the display board structure for timepieces concerning Example 4 of this invention. 6A is a plan view of a timepiece dial formed using the timepiece display plate structure according to Embodiment 5 of the present invention, and FIG. 6B is a cross-sectional view thereof. FIG. It is principal part sectional drawing. FIG. 6B is an enlarged view showing a portion A of FIG. 6B in an enlarged manner, and is an enlarged cross-sectional view showing a timepiece display plate structure according to Embodiment 5 of the present invention. It is principal part sectional drawing which concerns on Example 6 of this invention, and shows the structure of a wristwatch. It is a principal part perspective view of the turning ring in FIG. It is principal part sectional drawing of the turning ring in FIG.

Explanation of symbols

1, 11, 21, 31, 41, 51, 71 Light transmissive substrate 1a, 11a, 21a, 31a, 41a, 51a, 71a Uneven pattern 2, 12, 22, 32, 42, 52, 72 Colored layer 3, 13 , 23, 33, 43, 53, 73 Matte layer 3a, 13a, 23a, 33a, 43a, 53a, 73a Transparent resin 3b, 13b, 23b1, 23b2, 33b, 43b, 53b, 73b Fine particles 9, 89 Solar cell 10 , 20, 30, 40, 50, 60 Display board 67, 68, 80a Indicator 70, 95 Dial 80 Dial 80 Cover glass 92 Waterproof packing 94 Pointer 96 Movement 97 Watch case 98 Back cover 99 Medium frame 100 Wristwatch

Claims (13)

A display panel for a watch, the display panel comprising a light-transmitting substrate, a colored layer, and a matte layer, and the surface of the light-transmitting substrate has patterns, numbers, letters, and marks. A timepiece display plate structure, wherein at least one is provided. 2. The timepiece display panel structure according to claim 1, wherein the light-transmitting substrate is made of at least one of resin, glass, and sapphire glass. 2. The timepiece display board structure according to claim 1, wherein the colored layer is provided by at least one of a printing unit, a coating unit, a dry plating unit, and a transfer unit. 4. The timepiece display panel structure according to claim 1, wherein the colored layer is made of a colored resin film or a metal film. 5. The timepiece display panel according to claim 1, wherein the colored layer transmits a part of the incident light downward and reflects a part of the light. Construction. 2. The timepiece display panel structure according to claim 1, wherein the matte layer is made of a transparent resin film containing at least one fine particle of silica, alumina, zirconia, and titania. 2. The matte layer has a content of the fine particles in a range of 10 to 30 wt% with respect to 100 wt% of the transparent resin film (solid content) excluding the fine particles. The timepiece display board structure according to claim 6. The timepiece display plate according to claim 1, wherein the fine particles contained in the matte layer have a particle size in the range of 1.0 to 5.0 μm. Construction. The timepiece display panel structure according to any one of claims 1 to 6, wherein a dispersant for dispersing the fine particles is added to the matte layer. The transparent resin of the fine particle-containing transparent resin paint or transparent resin ink forming the mat layer is an acrylic resin, a urethane resin, an alkyd resin, an epoxy resin, or a modified resin thereof. The timepiece display panel structure according to any one of claims 1 to 6. 11. The timepiece display board structure according to claim 1, wherein the matte layer has a thickness in a range of 5 to 40 μm. 12. The timepiece display panel structure according to claim 1, wherein the matte layer has a transparent resin coating layer having a smooth surface on the surface of the matte layer. The timepiece display board structure according to any one of claims 1 to 12, wherein the timepiece display board is a dial, a parting board, or a dial ring.

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