JP2012127666A - Dial plate for chronometers, and chronometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable, in a dial plate for chronometers, deep reflected light of a hue similar to that of the dial plate for chronometers to be obtained and the dial plate to be more simply structured.SOLUTION: In a dial plate for chronometers comprising a polycarbonate plate 151 (a light-transmissive plate) of which the front face 152 (one face) closer to the viewer is formed smoothly and the rear face 153 (the other face) is formed in a fine convexo-concave shape 154, the polycarbonate plate 151 causes a part of light coming incident on the front face 152 to be diffused by the rear face 153 and another part of light coming incident on the front face 152 to be emitted from the rear face, and a light-transmissive colored layer 161 that is formed substantially along the convexo-concave shape 154 formed on the rear face 153 of the polycarbonate plate 151 can, by virtue of this configuration in spite of its simple structure, give the reflected light diffusively reflected by an under face 163 of the colored layer 161 a color corresponding to the wavelength band not absorbed by the colored layer.

Description

  The present invention relates to a timepiece display board and a timepiece having the timepiece display board.

  Conventionally, a portable watch such as a wristwatch provided with a solar cell (solar battery) inside a case is made of a transparent resin or glass that transmits light as a dial to obtain power by allowing light to reach the solar cell. What was formed by etc. is used.

  On the other hand, from the viewpoint of emphasizing appearance quality, there is a need for a dial that emits a metallic luster that gives a higher-grade impression than resin.

  Therefore, in order to achieve both good light transmission and appearance quality, there has been proposed a timepiece display plate capable of obtaining metallic reflected light while using a polycarbonate plate which is a transparent resin.

  For example, a timepiece display plate has been developed in which a light diffusing portion having a fine concavo-convex shape is formed on a front surface of a polycarbonate plate (a surface far from a solar panel housed in a watch case).

  This fine uneven shape is a fabric pattern or the like (Japanese Patent Laid-Open No. 8-15454), and is formed into a mold by a brush which is an aggregate of thin metal wires (for example, a diameter of 0.1 to 0.3 [mm]). Is formed.

  According to this timepiece display plate, a part of light such as sunlight enters the inside from the front surface of the polycarbonate plate and reaches the back surface. A part of the light reaching the back surface is emitted from the back surface, reaches the solar panel, and is used for power generation by the solar panel.

  On the other hand, another part of the light such as sunlight is diffusely reflected by the light diffusion portion formed on the front surface of the polycarbonate plate. The diffusely reflected light is visually recognized as a pattern (for example, a pattern with Asahi light weight) depending on the uneven shape as the light diffusing portion, but this pattern has a metallic luster. Visible.

  As a result, it is possible to achieve both good light transmission and improved appearance quality.

  By the way, the reflected light from the light diffusing part formed on the front surface of the polycarbonate plate is visually recognized in a relatively whitish color. Therefore, the color of the clock display plate (the color of the polycarbonate plate itself, or the polycarbonate plate and the solar panel) If a colored light-transmitting reflector is placed between the two, the color of the light-transmitting reflector is contrasted, giving a disproportionate impression, or creating a flat impression without depth or depth. This is particularly noticeable when the color of the dial is dark, such as black or dark blue.

  Moreover, as another problem regarding the appearance of the dial, the solar cell (solar cell) disposed below the dial exhibits a unique dark purple color, and when this solar cell is viewed from the upper side of the dial, it is aesthetically pleasing. Does not give a good feeling (decreasing appearance quality).

  That is, when the light transmittance of the dial plate is increased for the purpose of increasing the power generation efficiency of the solar cell, there is a problem that the solar cell is easily seen from above the dial plate and the appearance of the dial plate is impaired.

  Therefore, a timepiece having a structure in which a light scattering portion is formed on the back surface of the polycarbonate plate, a colored layer and a transparent resin layer are formed in this order on the front surface of the polycarbonate plate, and the surface of the transparent resin layer is polished smoothly. A display board has been proposed (Patent Document 1).

  According to this technology, the reflected light from the light diffusing section is emitted from the transparent resin layer through the colored layer, and thus is viewed as deep reflected light with a hue similar to the color of the watch display board. As a result, it is possible to produce a more luxurious feeling and to make the dark purple characteristic of the solar cell less visible.

JP 2010-160027 A

  However, since the above-described prior art watch display plate has a structure in which a transparent resin layer must be formed later on a polycarbonate plate having a concavo-convex shape on the back surface, the surface of the formed transparent resin layer It is necessary to go through a step of smooth polishing.

  In other words, in order to manufacture the above-described prior art timepiece display board, many steps are required: molding by a mold, formation of a colored layer, molding of a transparent resin layer, and polishing of the transparent resin layer.

  Assuming that the transparent resin layer described above is not provided, it is necessary to polish the upper surface of the colored resin layer. However, since the colored resin layer contains a pigment, the colored resin layer itself is scratched by the pigment during polishing. Therefore, the above assumption has a problem in practical use.

  The present invention has been made in view of the above circumstances, and obtains a deep reflected light with a hue similar to the color of the timepiece display board, and provides a timepiece display board having a simpler structure and the timepiece display board. An object is to provide a watch equipped with.

  The timepiece display panel according to the present invention has one surface formed smoothly and the other surface formed in a fine concavo-convex shape, and diffuses a part of light incident from the one surface on the other surface. In addition, a plate-shaped light transmission plate that emits another part of the light incident from one surface from the other surface, and a colored layer having light transmittance formed substantially along the uneven shape. It is characterized by having.

  Further, the timepiece according to the present invention includes the timepiece display plate according to the present invention and a solar cell disposed on the opposite side of the light transmission plate across the colored layer of the timepiece display plate. It is characterized by having.

  According to the timepiece display board and the timepiece according to the present invention, it is possible to obtain deep reflected light with a hue similar to the color of the timepiece display board and to have a simpler structure.

1 is an external view showing a portable timepiece as an embodiment of a timepiece according to the present invention. It is sectional drawing which shows arrangement | positioning of the timepiece display board and solar cell of Embodiment 1 in the timepiece shown in FIG. 1, (a) shows the whole, (b) shows the detail of the A section in (a). It is a figure explaining the state of the front surface of a polycarbonate board, (a) is a perspective view, (b) is sectional drawing. It is a figure showing the grid line (an example of uneven | corrugated shape) formed for the pattern by fabric weight, (a) is a grid line of Asahikari fabric weight, (b) is the grid line of paper fabric weight. It is a figure showing an example of uneven | corrugated shape, (a) is a circle pattern, (b) is a spiral pattern. It is a figure showing the grid | lattice-like geometric pattern as an example of uneven | corrugated shape, (a) is a bottom view showing the back surface of a polycarbonate board, (b) is an enlarged view of (a), (c) is in (b). It is a figure showing the cross section along a BB line. FIG. 3 is a cross-sectional view corresponding to FIG. 2, showing a timepiece display panel of Embodiment 2 used in the timepiece shown in FIG. 1, wherein (a) corresponds to a concave portion with a layer thickness corresponding to a triangular convex portion; (B) shows that the thickness of the layer corresponding to the triangular convex portion is larger than the thickness of the layer corresponding to the concave portion. It is a figure explaining the method of forming the colored layer shown to Fig.7 (a). It is a figure showing the example of the shape of the cross-sectional outline of an uneven | corrugated shaped convex part, (a) is trapezoid shape, (b) is circular arc shape. It is a figure showing the example of the shape of the cross-sectional outline of an uneven | corrugated shaped recessed part, (a), (b) is triangular shape, (c), (d) is circular arc shape. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a timepiece display panel of Embodiment 3 used in the timepiece shown in FIG. 1, and (a) shows a layer thickness of a portion corresponding to a rectangular protrusion between rectangles; The thickness of the layer corresponding to the concave portion is smaller than the thickness of the layer corresponding to the concave portion, and (b) is greater than the thickness of the layer corresponding to the concave portion between the rectangles. Show. It is a figure explaining the method of forming the colored layer shown to Fig.11 (a). FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a timepiece display panel of Embodiment 4 used in the timepiece shown in FIG. 1, and (a) is for each portion corresponding to a slope connecting a triangular convex portion and a concave portion. (B) shows the thing from which the thickness of a layer differs for every part corresponding to the vertical surface which connects a rectangular convex part and the recessed part between rectangles, respectively. It is a figure explaining the method of forming the colored layer shown in FIG. 13, (a) represents the thing corresponding to FIG. 13 (a), (b) represents the thing corresponding to FIG.13 (b), respectively. It is a figure explaining the other method (modification) which forms the colored layer shown in FIG. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a timepiece display panel of Embodiment 5 used in the timepiece shown in FIG. 1. Both (a) and (b) show examples in which the unevenness is not regular in the uneven shape, and the recesses and the protrusions are not symmetrical. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a timepiece display panel of Embodiment 6 used in the timepiece shown in FIG. 1, having a triangular cross-sectional outline, (a) and (b) It depends on the combination of the layer thicknesses of the two colored layers. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a timepiece display panel of Embodiment 6 used in the timepiece shown in FIG. 1, having a rectangular cross-sectional outline, (a) and (b) It depends on the combination of the layer thicknesses of the two colored layers. FIG. 8 is a cross-sectional view corresponding to FIG. 7, showing a timepiece display panel of Embodiment 6 used in the timepiece shown in FIG. 1, with two layers of colored layers for each direction of a portion connecting a convex portion and a concave portion. This is due to the combination of opposite thicknesses, where (a) shows a triangular cross-sectional profile and (b) shows a rectangular cross-sectional profile. FIG. 8 is a cross-sectional view corresponding to FIG. 7 showing a timepiece display panel of a seventh embodiment used in the timepiece shown in FIG. 1, and shows a structure in which two colored layers are arranged in parallel. FIG. 9 is a cross-sectional view corresponding to FIG. 2, showing a timepiece display board according to an eighth embodiment used in the timepiece shown in FIG. 1, wherein the timepiece display board according to the first to seventh embodiments further includes a transmission type reflection plate. To express.

  Hereinafter, a specific embodiment of a timepiece display board according to the present invention and a timepiece using the timepiece display board will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is an external view showing a portable timepiece 200 as an embodiment of a timepiece according to the present invention.

  The illustrated watch 200 includes a watch body 110 and a watch band 192 that allows the watch body 110 to be attached to and detached from a user's arm. The watch body 110 includes a metal case 120 and hands 191 such as an hour hand, a minute hand, and a second hand. A watch 140 as an embodiment of the present invention, which is provided between the movement 140 which is a mechanism for driving the movement, the solar cell 130 provided as the power of the movement 140, and the hands 191 and the solar cell 130 150.

  Here, the solar cell 130 is formed in a flat plate shape along the paper surface of FIG. 1, and the watch display board 150 covers the solar cell 130.

  Further, when the light amount incident on the watch display plate 150 is 100 [%], the solar cell 130 generates power if the light amount incident on the solar cell 130 is 10 [%] or more, and the generated power is The energy is sufficient to drive the hands 191 and the like of the timepiece 200.

  As shown in FIG. 2, the watch display board 150 has a smooth front surface 152 (one surface (a surface opposite to one surface)) close to the viewer, and a back surface 153 ( The other surface (one surface) is formed in a fine concavo-convex shape 154, and a part of the light incident from the front surface 152 is diffused by the back surface 153 and the light incident from the front surface 152 A plate-shaped polycarbonate resin-made polycarbonate plate 151 (light transmission plate) for emitting a part of the glass plate from the back surface 153, and a light transmission property formed substantially along the uneven shape 154 formed on the back surface 153 of the polycarbonate plate 151. A colored layer 161 having

  Here, the front surface 152 of the polycarbonate plate 151 is formed to be smooth, but this smoothness means that it is microscopically smooth, and macroscopically, for example, a perspective view of FIG. There may be large irregularities such as steps as shown in the cross-sectional view of FIG. That is, the front surface 152 may be a surface that does not cause diffuse reflection or is extremely small even if diffuse reflection occurs, and is not limited to a flat surface and may be a curved surface having a slight curvature.

  On the other hand, the fine uneven shape 154 formed on the back surface 153 causes diffuse reflection, and is formed to express the pattern of the watch display board 150 by the reflected light by the diffuse reflection. Yes.

  This pattern is, for example, a pattern by Asahi light weight or a paper weight, and these weights are, for example, streaks formed radially by a wire brush having a wire diameter of 80 [μm] (Asahi Light weight: FIG. )) Or parallel streaks (also known as stripe patterns, paper weight: FIG. 4 (b)), and these streaks correspond to the fine concavo-convex shape 154.

  As a specific method for forming the basis weight, for example, a known method disclosed in Japanese Patent Application Laid-Open No. 2003-14507 can be applied.

  Moreover, when the method of manufacturing the uneven | corrugated shape 154 formed in the back surface 153 of the polycarbonate board 151 by resin molding is used, a desired pattern can be obtained by transferring the pattern formed in the metal mold | die.

  As described above, the pattern formed on the back surface 153 of the polycarbonate plate 151 includes, for example, a circle pattern (concentric pattern: FIG. 5A) and a spiral pattern (FIG. (B)) A geometric pattern (FIG. 6A) in which square pyramids are regularly arranged in a grid pattern, a random pattern, a pattern-like pattern or the like can be applied, and the types of patterns to be applied are limited. Not.

  Note that the lattice-like geometric pattern shown in FIG. 6 (a) has the sides on the bottom of the quadrangular pyramid adjacent to each other as shown in FIG. 6 (b), which is a partially enlarged view of FIG. 6 (a). A geometrical pattern having a contour shape in which a large number of quadrangular pyramids are regularly and horizontally arranged in a lattice shape, and is a cross-sectional view of the same figure (c) (a figure showing a cross section along line BB in the same figure (b)). As shown in FIG. 4, the concavo-convex shape 154 is formed with a quadrangular pyramid contour shape.

  The polycarbonate plate 151 has an optical characteristic having optical transparency in at least a part of the visible light wavelength band.

  Of the colored layer 161 formed substantially along the concave-convex shape 154 of the polycarbonate plate 151, a surface 162 facing the polycarbonate plate 151 (hereinafter referred to as an upper surface 162 for ease of explanation) is shown in FIG. As shown in FIG. 4, the concave and convex shape 154 formed on the back surface 153 of the polycarbonate plate 151 is closely attached.

  On the other hand, the surface 163 of the colored layer 161 far from the polycarbonate plate 151 (the surface 163 opposite to the surface 162 facing the polycarbonate plate 151. Hereinafter, for the sake of simplicity, the lower surface 163 is referred to). As shown in FIG. 2B, the uniform layer thickness t following the uneven shape 154 of the polycarbonate plate 151 (the thickness of the concave portion, the convex portion, and the slope portion connecting the uneven portions of the uneven shape 154 of the polycarbonate plate 151 is All may be substantially the same surface t).

  However, since the layer thickness t of the colored layer 161 is smaller than the depth of the concave-convex shape 154 of the polycarbonate plate 151 (the depth of the concave portion with respect to the convex portion), the lower surface 163 is the position of the concave portion of the concave-convex shape 154 of the polycarbonate plate 151. Then, the concave / convex position of the concave / convex shape 154 is formed on the corresponding surface so as to be a concave portion and to be a protruding portion at the convex portion of the concave / convex shape 154 of the polycarbonate plate 151.

  In addition, this colored layer 161 also has light transmittance in a part of visible light wavelength band similar to the polycarbonate plate 151.

  The colored layer 161 may be formed by any process, and is applied to the concavo-convex shape 154 of the polycarbonate plate 151 by, for example, one printed by a printing technique or a painting technique such as spraying. Can be applied.

  In any method of printing and painting that can be applied as a step of forming the colored layer 161, a urethane type, an acrylic type, an epoxy type to which a coloring agent such as a pigment or a dye for obtaining a desired color tone is added as the colored layer 161 It is possible to use known inks and paints.

  It is also possible to adjust color tone and light transmittance by mixing transparent ink or paint in advance with ink or paint having a desired color tone.

  In the first embodiment, the transparent type of the same epoxy ink # 1000 is mixed with the colored type (blue, red, etc.) of the two-component curing type epoxy ink # 1000 manufactured by Seiko Advance Co., Ltd. The colored layer 161 was formed by a screen printing technique.

  The concavo-convex shape 154 according to the first embodiment is a stripe in the range of the apex angle of the convex portion of 75 to 100 [deg], the cross-sectional outline of the triangle having a height of 15 to 100 [μm], and the pitch of 50 to 150 [μm]. Although it is formed as a pattern, various geometric patterns including a lattice-shaped geometric pattern, and the types of patterns as the concavo-convex shape 154 such as a circle pattern and a spiral pattern can be applied without any restriction. be able to.

  Further, since the mirror surface of the mold is directly transferred to the front surface 152 of the polycarbonate plate 151 which is a light transmission plate in the present embodiment by injection molding, a smoothing process such as polishing in another process is not required.

  According to the timepiece display plate 150 of the present embodiment configured as described above, when the external light from the viewer side reaches the front surface 152 of the polycarbonate plate 151, the polycarbonate plate 151 has light transmittance. Therefore, the light enters the inside of the polycarbonate plate 151 and travels inside the polycarbonate plate 151.

  A part of the advanced light passes through the back surface 153 formed in the fine uneven shape 154, and further enters the colored layer 161 having light transmissivity formed substantially along the uneven shape 154. Then, it travels through the colored layer 161, exits from the lower surface 163 of the colored layer 161, and reaches the solar cell 130 disposed on the back side of the watch display plate 150.

  As a result, the solar cell 130 can convert the energy of the light that has arrived into electrical energy, and output this electrical energy as power for driving the timepiece 200.

  On the other hand, another part of the light traveling inside the polycarbonate plate 151 is transmitted through the back surface 153 formed in the fine uneven shape 154, and enters the colored layer 161 formed substantially along the uneven shape 154 of the back surface 153. Incident light travels through the colored layer 161, diffusely reflects off the lower surface 163 of the colored layer 161, reenters the polycarbonate plate 151, and exits from the front surface 152 of the polycarbonate plate 151.

  The light emitted from the front surface 152 of the polycarbonate plate 151 is light reflected by the lower surface 163 of the colored layer 161, that is, the surface following the uneven shape 154 formed on the back surface 153 of the polycarbonate plate 151. The reflected light substantially depends on the uneven shape 154 formed on the back surface 153 of the polycarbonate plate 151.

  Therefore, if the uneven shape 154 is formed by a line that expresses a pattern of the display panel 150 for watches (Asahi light weight pattern or the like), reflected light corresponding to the pattern can be obtained.

  Moreover, since this reflected light travels inside the colored layer 161, it becomes light of a color corresponding to the wavelength band that is not absorbed by the colored layer 161 (a color that is visually recognized as the color of the colored layer 161). Since this light is not simply a whitish color as in the prior art, deep reflected light can be obtained with a hue similar to the color of the watch display board 150 (the color of the colored layer 161).

  Furthermore, since the front surface 152 of the polycarbonate plate 151 on which external light is incident is formed as a smooth surface by a mold when the polycarbonate plate 151 is formed, a transparent resin is formed on the front surface 152 as in the prior art. There is no need to separately provide a layer and the like and to smoothly polish the transparent resin layer, so that a simpler structure can be obtained.

  The watch display board 150 of the present embodiment uses a polycarbonate plate 151 as an example of a light transmission plate, but the watch display board according to the present invention is not limited to this form. The transmission plate may be formed of any material as long as it has optical properties having light transmission properties in at least a part of the visible light wavelength band. In addition to other resins, it is made of glass or sapphire. It may be made of ceramics or ceramics.

  Moreover, as long as it has light transmittance, what is colorless and transparent, colorless and translucent, colored and transparent, colored and translucent, etc. can also be applied as a light-transmitting plate.

  In the watch display board 150 of the above-described embodiment, the diffuse reflection light emitted from the front surface 152 of the polycarbonate plate 151 is not only the light diffusely reflected by the lower surface 163 of the colored layer 161 but also the back surface of the polycarbonate plate 151. The light diffusely reflected at the boundary surface between 153 and the upper surface 162 of the colored layer 161 is also included. The light diffusely reflected at the boundary surface between the back surface 153 of the polycarbonate plate 151 and the upper surface 162 of the colored layer 161 is perceived by the viewer as whitish light alone, but the colored layer 161 In a state where the light is diffusely reflected by the lower surface 163 and mixed with light of a color that is not absorbed by the colored layer 161, the viewer is visually recognized as light of a color that is not absorbed by the colored layer 161.

  The refractive index of the polycarbonate plate 151 and the refractive index of the colored layer 161 are preferably substantially the same. Thus, according to the watch display plate 150 having the substantially same refractive index, the polycarbonate display plate 150 has a polycarbonate Since the amount of light diffusely reflected at the boundary surface between the back surface 153 of the plate 151 and the upper surface 162 of the colored layer 161 is reduced, the proportion of the diffusely reflected light on the lower surface 163 of the colored layer 161 in the diffusely reflected light visually recognized by the viewer Can be relatively increased, and the color of the diffuse reflected light visually recognized by the viewer can be made deeper.

  Here, the refractive index when the refractive index of the polycarbonate plate 151 and the refractive index of the colored layer 161 are substantially the same may be set to about 1.5, for example.

  The layer thickness t of the colored layer 161 of the present embodiment is formed in a substantially uniform thickness in the range of 5 to 30 [μm]. When the layer thickness t is less than 5 μm, the color of the colored layer 161 becomes difficult to be visually recognized. When the layer thickness t exceeds 30 μm, the light transmittance is reduced or it is difficult to form a uniform thickness. Accordingly, the thickness t of the colored layer 161 is preferably in the range of 5 to 30 [μm].

  Since the timepiece 200 as one embodiment of the present invention described above includes the timepiece display board 150 according to one embodiment of the present invention, the hue is similar to the color of the timepiece display board 150 with a simpler structure. In addition to being able to obtain deep reflected light, the deep purple color peculiar to solar cells is difficult to be seen.

  In the following embodiments, descriptions of the same configurations, operations, and effects as those in Embodiment 1 are omitted as appropriate.

(Embodiment 2)
FIG. 7 is a cross-sectional view corresponding to FIG. 2 showing the timepiece display board 150 of the second embodiment used in the timepiece 200 shown in FIG.

  The basic structure of the timepiece display board 150 shown in the figure is the same as that of the timepiece display board 150 shown in the first embodiment, but the colored layer 161 formed along the uneven shape 154 of the back surface 153 of the polycarbonate plate 151. However, it differs from the watch display board 150 of the first embodiment in that the layer thickness t is different for each part corresponding to the uneven shape 154.

  That is, the timepiece display plate 150 shown in FIG. 7 has a concave / convex shape 154 on the back surface 153 of the polycarbonate plate 151 having a triangular cross-sectional outline (for example, a prism having a triangular cross-sectional outline is arranged. The colored layer 161 is formed so that the layer thickness t2 of the portion corresponding to the convex portion of the triangle in the section and the layer thickness t1 of the portion corresponding to the concave portion between the triangles in the cross section are different from each other. ing.

  Specifically, in the colored layer 161 shown in FIG. 7A, the layer thickness t2 of the portion corresponding to the triangular convex portion is smaller than the layer thickness t1 of the portion corresponding to the concave portion (t2 <t1). The layer thickness t3 of the portion corresponding to the triangular slope (portion connecting the convex portion and the concave portion) is larger than the thickness t2 and smaller than the thickness t1 (t2 <t3 <t1).

  On the other hand, in the colored layer 161 shown in FIG. 7B, the layer thickness t2 of the portion corresponding to the triangular convex portion is larger than the layer thickness t1 of the portion corresponding to the concave portion (t1 <t2). The layer thickness t3 of the portion corresponding to the slope is formed larger than the thickness t1 and smaller than the thickness t2 (t1 <t3 <t2).

  Thus, according to the timepiece display board 150 of the second embodiment in which the color layer 161 has a different layer thickness t for each portion corresponding to the uneven shape 154, the colored layer 161 passes through the inside of the polycarbonate plate 151. The reflected light (diffuse reflected light) emitted from the surface 152 exhibits a pattern corresponding to the uneven shape of the lower surface 163 of the colored layer 161. The uneven shape of the lower surface 163 of the colored layer 161 is the layer thickness of the colored layer 161. Therefore, by changing the thickness t of the colored layer 161 for each portion of the concavo-convex shape 154, the sharpness and contrast (difference in density) of the pattern due to the reflected light are different. And variations in appearance can be varied.

  In the case of the color layer 161 (FIG. 7A) in which the layer thickness t2 corresponding to the convex portion is formed thinner than the layer thickness t1 corresponding to the concave portion (FIG. 7A), the pattern sharpness and contrast ( The difference in shading becomes stronger, and the clarity of the pattern can be relatively improved and visually recognized.

  On the other hand, in the case of the color layer 161 (FIG. 7B) in which the layer thickness t2 corresponding to the convex portion is formed thicker than the layer thickness t1 corresponding to the concave portion (FIG. 7B), the pattern sharpness and contrast ( (Tint difference) becomes stronger, and the clarity of the pattern can be relatively improved and visually recognized.

  Here, as shown in FIG. 8, the colored layer 161 shown in FIG. 7A includes a polycarbonate plate 151 whose front surface 152 is on the lower side in the direction of gravity and back surface 153 is on the upper side in the direction of gravity. Then, a colored layer 161 is formed on the back surface 153 (upper surface in FIG. 8) on which the concavo-convex shape 154 is formed by a printing or painting technique and left as it is for a predetermined time. By causing the ink or paint forming the layer 161 to flow from the convex portion of the concavo-convex shape 154 to the concave portion by the action of gravity, the layer thickness t2 of the portion corresponding to the convex portion is larger than the layer thickness t1 of the portion corresponding to the concave portion. Can also be formed thin.

  As shown in FIG. 7A, the polycarbonate plate 151 is arranged so that its front surface 152 is on the upper side in the direction of gravity and the rear surface 153 is on the lower side in the direction of gravity. A colored layer 161 is formed on the back surface 153 on which the surface 154 is formed by printing or painting techniques. Immediately after that, the front surface 152 is on the lower side in the direction of gravity and the rear surface 153 is on the upper side in the direction of gravity. The polycarbonate 151 may be turned upside down (the state shown in FIG. 8) and left as it is for a predetermined time. In this case, the ink or paint forming the colored layer 161 is removed from the convex portion of the concave and convex shape 154 by the action of gravity. By flowing in the concave portion, the layer thickness t2 corresponding to the convex portion can be formed thinner than the layer thickness t1 corresponding to the concave portion.

  In addition, when the colored layer 161 is formed on the back surface 153 of the polycarbonate plate 151 by a printing or painting technique, and the ink or paint forming the colored layer 161 is dried, the polycarbonate plate is immediately after the colored layer 161 is formed. 151 is arranged (FIG. 8) so that the front surface 152 is on the lower side in the direction of gravity and the rear surface 153 is on the upper side in the direction of gravity, and the colored layer 161 from the lower surface 163 side of the colored layer 161 is placed. By blowing air (cold air, warm air, hot air, etc.) toward the surface, the air or air flow causes ink or paint to flow from the convex portion of the concavo-convex shape 154 to the concave portion, and the layer corresponding to the convex portion The thickness t2 can be formed thinner than the layer thickness t1 corresponding to the concave portion.

  Thus, by forcibly flowing the ink or paint by blowing air, it is easier to form a difference in the layer thickness t than when the ink or paint is made to flow simply by the action of gravity.

  On the other hand, the colored layer 161 shown in FIG. 7B is obtained by arranging the polycarbonate plate 151 so that the front surface 152 is on the upper side in the direction of gravity and the back surface 153 is on the lower side in the direction of gravity. The colored layer 161 is formed on the back surface 153 on which the concavo-convex shape 154 is formed by a printing or painting technique, and is left as it is for a predetermined time, so that the ink or paint forming the colored layer 161 is undulated by the action of gravity. By flowing from the concave portion of the shape 154 to the convex portion, the layer thickness t1 of the portion corresponding to the concave portion can be formed thinner than the layer thickness t2 of the portion corresponding to the convex portion.

  In addition, the polycarbonate plate 151 is arranged on the back surface 153 on which the concavo-convex shape 154 is formed after the front surface 152 is located on the lower side in the gravity direction and the back surface 153 is located on the upper side in the gravity direction. Alternatively, the colored layer 161 is formed by a coating technique, and immediately after that, the polycarbonate 151 is turned over so that the front surface 152 is on the upper side in the direction of gravity and the rear surface 153 is on the lower side in the direction of gravity (see FIG. In this case, the ink or paint forming the colored layer 161 is caused to flow from the concave portion of the concave-convex shape 154 to the convex portion by the action of gravity. The layer thickness t1 corresponding to the concave portion can be formed thinner than the layer thickness t2 corresponding to the convex portion.

  Here, the watch display board 150 according to the second embodiment includes the one shown in FIG. 7 (a) and the one shown in FIG. 7 (b), both of which correspond to triangular slopes. The layer thickness t3 is different for each height position from the convex portion to the concave portion.

  This is accompanied by forming a difference between the layer thickness t2 of the portion corresponding to the convex portion and the layer thickness t1 of the portion corresponding to the concave portion, but the layer thickness t2 and the concave portion of the portion corresponding to the convex portion. Even if the colored layer 161 has a layer thickness t1 that is substantially the same as the layer thickness t1, the difference in the layer thickness t3 for each height position from the convex portion to the concave portion of the portion corresponding to the triangular slope. It may be formed.

  Thus, according to the timepiece display board 150 in which the layer thickness t3 is different for each portion corresponding to the triangular slope, the portion corresponding to the triangular slope of the pattern by the reflected light visually recognized by the viewer The contrast (darkness difference) can be changed, the appearance can be varied in various ways, and the unique dark purple color of the solar cell placed below the watch dial 150 is difficult to see It has become.

  In the watch display board 150 of the second embodiment, as in the watch display board 150 of the first embodiment, the same epoxy type as the colored type (blue, red, etc.) of the two-component curing type epoxy ink # 1000. A transparent type of ink # 1000 was mixed, and a colored layer 161 was formed by screen printing technique. And after the formation of the colored layer 161, it heat-dried at the temperature of 60-80 [degreeC] for 30 [min] -1 [hour].

  Epoxy inks and the like are temporarily reduced in viscosity when heated to 60 to 80 [° C.], so that the fluidity is improved compared to the state at room temperature, and compared to the drying at room temperature, FIG. The difference between t1 and t2 shown in FIG. 2 can be formed larger, and the drying (curing) time can be shortened. It should be noted that substantially the same effect can be obtained by drying while blowing hot air as described above.

  In FIGS. 7 and 8 for explaining the timepiece display plate 150 of the second embodiment, the uneven shape 154 of the back surface 153 of the polycarbonate plate 151 has a triangular cross-sectional shape, and a portion between the triangles ( The space portion in which the substance of the polycarbonate plate 151 does not exist has a substantially trapezoidal cross-sectional outline, but the irregular shape in the watch display plate of the present invention is the above-described shape in the watch display plate 150 of the first embodiment. In addition to the above-described triangle, the shape of the cross-sectional contour of the concavo-convex convex portion is not limited to the trapezoidal shape (FIG. 9A), rectangular shape (FIG. 11: Embodiment 3 described later), arc Various shapes such as the shape (FIG. 9B) can be applied, and the shape of the cross-sectional contour of the concave portion of the concave-convex shape (the space portion where the polycarbonate plate 151 does not exist) As other trapezoidal described above, a triangular shape (FIG. 10 (a), (b)), arcuate (FIGS. 10 (c), (d)) or the like can be used.

  In addition, the uneven shape may be formed by an unspecified curved surface in addition to the shape specified by the cross-sectional contour shape such as the above-described triangular shape, trapezoidal shape, rectangular shape, arc shape or the like.

  Note that, as in the first embodiment, the uneven shape 154 in the watch display panel 150 of the second embodiment also has an apex angle of 75 to 100 [deg] and a height of the cross-sectional triangle of 15 to 100 [μm]. Are formed as a stripe pattern with a pitch in the range of 50 to 150 [μm], but as a concavo-convex shape 154 such as various geometric patterns including a lattice-like geometric pattern, a circle pattern, a spiral pattern, etc. The pattern type can be applied without any restrictions.

(Embodiment 3)
FIG. 11 is a cross-sectional view corresponding to FIG. 7 showing the timepiece display board 150 of the third embodiment used in the timepiece 200 shown in FIG.

  The basic configuration of the timepiece display board 150 shown in the figure is the same as that of the timepiece display board 150 shown in the second embodiment, but the uneven shape 154 formed on the back surface 153 of the polycarbonate plate 151 is different from that of the second embodiment. Is different in that the cross-sectional outline is formed in a rectangular shape (for example, a quadrangular prism or a cylinder is arranged), and the colored layer 161 has a layer thickness corresponding to the rectangular convex portion of the cross-sectional outline. The layer thickness t1 of the site | part corresponding to the recessed part (part between rectangles) between the rectangles of t2 and a cross section differs from each other.

  Specifically, in the colored layer 161 shown in FIG. 11A, the layer thickness t2 of the part corresponding to the rectangular convex part is smaller than the layer thickness t1 of the part corresponding to the concave part between the rectangles (t2 <t1). ) Formed.

  On the other hand, the colored layer 161 shown in FIG. 11B is formed such that the layer thickness t2 of the part corresponding to the rectangular convex part is larger than the layer thickness t1 of the part corresponding to the concave part between the rectangles (t1 <t2). It is a thing.

  As described above, according to the timepiece display board 150 of the third embodiment in which the layer thickness t is different for each portion corresponding to the uneven shape 154, the colored layer 161 passes through the inside of the polycarbonate plate 151. The reflected light (diffuse reflected light) emitted from the surface 152 exhibits a pattern corresponding to the uneven shape of the lower surface 163 of the colored layer 161. The uneven shape of the lower surface 163 of the colored layer 161 is the layer thickness of the colored layer 161. Therefore, by changing the thickness t of the colored layer 161 for each portion of the concavo-convex shape 154, the sharpness and contrast (difference in density) of the pattern due to the reflected light are different. And variations in appearance can be varied.

  In the case of the color layer 161 (FIG. 11A) in which the layer thickness t2 corresponding to the convex portion is formed thinner than the layer thickness t1 corresponding to the concave portion (FIG. 11A), the pattern sharpness and contrast ( The difference in shading becomes stronger, and the clarity of the pattern can be relatively improved and visually recognized.

  On the other hand, in the case of the color layer 161 (FIG. 11B) in which the layer thickness t2 corresponding to the convex portion is formed thicker than the layer thickness t1 corresponding to the concave portion (FIG. 11B), the pattern sharpness and contrast ( (Tint difference) becomes stronger, and the clarity of the pattern can be relatively improved and visually recognized.

  Here, as shown in FIG. 12, the colored layer 161 shown in FIG. 11A includes a polycarbonate plate 151 whose front surface 152 is on the lower side in the direction of gravity and back surface 153 is on the upper side in the direction of gravity. Then, a colored layer 161 is formed on the back surface 153 (upper surface in FIG. 12) on which the concavo-convex shape 154 is formed by a printing or painting technique and left as it is for a predetermined time. By causing the ink or paint forming the layer 161 to flow from the convex portion of the concavo-convex shape 154 to the concave portion by the action of gravity, the layer thickness t2 of the portion corresponding to the convex portion is larger than the layer thickness t1 of the portion corresponding to the concave portion. Can also be formed thin.

  As shown in FIG. 11 (a), the polycarbonate plate 151 is arranged so that the front surface 152 is on the upper side in the direction of gravity and the rear surface 153 is on the lower side in the direction of gravity. A colored layer 161 is formed on the back surface 153 on which the surface 154 is formed by printing or painting techniques. Immediately after that, the front surface 152 is on the lower side in the direction of gravity and the rear surface 153 is on the upper side in the direction of gravity. The polycarbonate 151 may be turned upside down (in the state shown in FIG. 12) and left as it is for a predetermined time. In this case, the ink or paint for forming the colored layer 161 is removed from the convex portion of the concave and convex shape 154 by the action of gravity. By flowing in the concave portion, the layer thickness t2 corresponding to the convex portion can be formed thinner than the layer thickness t1 corresponding to the concave portion.

  In addition, when the colored layer 161 is formed on the back surface 153 of the polycarbonate plate 151 by a printing or painting technique, and the ink or paint forming the colored layer 161 is dried, the polycarbonate plate is immediately after the colored layer 161 is formed. 151 is arranged so that the front surface 152 is on the lower side in the direction of action of gravity and the rear surface 153 is on the upper side in the direction of action of gravity (FIG. 12), and then the colored layer 161 from the lower surface 163 side of the colored layer 161 is placed. By blowing air (cold air, warm air, hot air, etc.) toward the surface, the air or air flow causes ink or paint to flow from the convex portion of the concavo-convex shape 154 to the concave portion, and the layer corresponding to the convex portion The thickness t2 can be formed thinner than the layer thickness t1 corresponding to the concave portion.

  In this way, by forcibly flowing the ink or paint by blowing air, it is easier to form a difference in the layer thickness t between the convex portion and the concave portion than when the ink or the paint is simply caused to flow by the action of gravity.

  On the other hand, the colored layer 161 shown in FIG. 11B is obtained by arranging the polycarbonate plate 151 so that the front surface 152 is on the upper side in the gravity direction and the back surface 153 is on the lower side in the gravity direction. The colored layer 161 is formed on the back surface 153 on which the concavo-convex shape 154 is formed by a printing or painting technique, and is left as it is for a predetermined time, so that the ink or paint forming the colored layer 161 is undulated by the action of gravity. By flowing from the concave portion of the shape 154 to the convex portion, the layer thickness t1 of the portion corresponding to the concave portion can be formed thinner than the layer thickness t2 of the portion corresponding to the convex portion.

  In addition, the polycarbonate plate 151 is arranged on the back surface 153 on which the concavo-convex shape 154 is formed after the front surface 152 is located on the lower side in the gravity direction and the back surface 153 is located on the upper side in the gravity direction. Alternatively, the colored layer 161 is formed by a painting technique, and immediately after that, the polycarbonate 151 is turned over so that the front surface 152 is on the upper side in the direction of gravity and the rear surface 153 is on the lower side in the direction of gravity (see FIG. In this case, the ink or paint forming the colored layer 161 is caused to flow from the concave portion of the concave-convex shape 154 to the convex portion by the action of gravity. The layer thickness t1 corresponding to the concave portion can be formed thinner than the layer thickness t2 corresponding to the convex portion.

  The method for forming the colored layer 161 by printing, the ink used, and the like are the same as those in the second embodiment, and a duplicate description is omitted.

  The difference between the watch display board 150 of the second embodiment and the watch display board 150 of the third embodiment is the difference in the shape of the concavo-convex shape 154. Specifically, the watch display board 150 of the second embodiment is different from the watch display board 150 of the second embodiment. Since the uneven shape 154 formed on the back surface 153 of the polycarbonate plate 151 is formed in a triangular cross-sectional outline, in FIG. 7A, the light-colored portion of the colored layer 161 (protrusion with a relatively thin layer thickness t) is formed. Portion) can be expressed finely and sharply, while in FIG. 7B, a dark portion (a convex portion having a relatively thick layer thickness t) in the colored layer 161 can be expressed finely and sharply.

  As a pattern suitable for finely and sharply expressing the thin part or the thick part in this manner, for example, a pattern based on Asahi light is suitable.

  In addition, according to the watch display board 150 to which a lattice-like geometric pattern is applied as the uneven shape 154 in which fine square pyramids are regularly arranged in a lattice shape, the colored layer 161 is formed, so that jewelry is scattered. A sense of quality can be given by the brightness.

  Further, the concave / convex shape 154 is formed not only on the entire back surface 153 of the polycarbonate plate 151 but only on a part thereof, and a portion where the concave / convex shape 154 is not formed is masked, and then on the portion where the concave / convex shape 154 is formed. The colored layer 161 may be formed only by printing or painting techniques. According to such a timepiece display board 150, it is possible to apply an excellent design variation that has been difficult in the past.

  On the other hand, in the timepiece display board 150 of the third embodiment, on the back surface 153 of the polycarbonate plate 151, the width of the convex part in the concave-convex shape 154 is 50 to 150 [μm], the width of the concave part is 100 to 500 [μm], Compared with the uneven shape 154 in the timepiece display plate 150 of the second embodiment, the corresponding width is formed larger, so that a rough stripe pattern with a large pitch is formed.

  Here, the layer thickness t of the colored layer 161 can be continuously changed. Thus, according to the watch display plate 150 formed by continuously changing the layer thickness t, a conventional screen is used. It is possible to easily and inexpensively realize shading expression and gradation (brightness) expression that are difficult to realize by printing, offset printing, pad printing, and other techniques.

  In addition, like the display panel 150 for the watch of the third embodiment, by setting the width of the convex portion and the width of the concave portion in the concavo-convex shape 154 to be larger, such shadow expression and gradation expression can be made more prominent. Can be more effective.

  In the timepiece display plate 150 of the third embodiment, the concave and convex shapes 154 of the polycarbonate plate 151 have a concave portion whose width is 80 [μm] larger than that of the convex portion, and is similarly 200 [μm] larger. Then, when a stripe pattern was applied as the uneven shape 154, and a watch display board 150 in which a colored layer 161 was formed by a printing technique similar to the watch display board 150 of the second embodiment was prototyped, When the width is 80 [μm] larger than the width of the convex portion, a gentle gradation with a relatively small contrast (shading difference) is obtained compared to the width of the concave portion being 200 [μm] larger than the width of the convex portion. On the other hand, when the width of the concave portion is 200 [μm] larger than the width of the convex portion, the contrast is relatively higher than when the width of the concave portion is 80 [μm] larger than the width of the convex portion. It was possible to obtain a large sharp gradient shading difference).

  As described above, the timepiece display board 150 according to the third embodiment has a dimensional difference in the width of the convex portion with respect to the width of the concave portion in the concave and convex shape 154 in addition to the operation and effect of the timepiece display board 150 according to the first embodiment. The layer thickness of the colored layer 161 formed on the polycarbonate plate 151 can be easily adjusted by adjusting the type of ink or paint, the drying temperature and time, and is thus visually recognized by the watch display plate 150. The contrast of reflected light can be easily adjusted.

(Embodiment 4)
FIG. 13 is a cross-sectional view corresponding to FIG. 7 showing the timepiece display panel 150 of the fourth embodiment used in the timepiece 200 shown in FIG.

  The basic structure of the timepiece display board 150 shown in the figure is the same as that of the timepiece display board 150 shown in the second embodiment and the timepiece display board 150 shown in the third embodiment. The layer thickness t3 of the portion corresponding to the surface (slope) connecting the concave portion and the convex portion of the concavo-convex shape 154 of the back surface 153 of the plate 151 differs depending on the direction of the slope.

  That is, in the watch display plate 150 shown in FIG. 13A, the uneven shape 154 of the back surface 153 of the polycarbonate plate 151 has a triangular cross-sectional outline. The layer thicknesses t3a and t3b are different from each other.

  Specifically, the layer thickness t3a corresponding to the slope on the left side of the triangle in the drawing is larger than the layer thickness t3b corresponding to the slope on the right side of the triangle in the drawing (t3b <t3a).

  For example, as shown in FIG. 14A, the timepiece display plate 150 is a polycarbonate plate 151 having a front surface 152 on the lower side in the direction of gravity and a back surface 153 on the upper side in the direction of gravity. Further, the polycarbonate plate 151 is inclined by an angle θ (θ = 20 [deg] to 45 [deg]) with respect to the horizontal plane, and in this state, printing or painting is performed on the back surface 153 on which the uneven shape 154 is formed. The colored layer 161 is formed by a technique and left as it is for a predetermined time, so that the colored layer 161 is a relatively thick layer (layer on the slope on the left side in FIG. 13A) with a gentle slope. A thickness t3a) and a relatively thin layer (layer thickness t3b) on the slope having the steep apparent slope (the slope on the right side in FIG. 13B), and the timepiece display panel shown in FIG. Forming 150 You can.

  Further, in the watch display plate 150 shown in FIG. 13B, the concave and convex shape 154 of the back surface 153 of the polycarbonate plate 151 has a rectangular cross section, and the direction of the surface connecting the rectangular concave portion and the convex portion is the same. Accordingly, the layer thicknesses t3a and t3b on the surface are different from each other.

  Specifically, the layer thickness t3a of the portion corresponding to the left side surface (surface facing left) of the rectangle in the figure is the portion thickness t3a corresponding to the right side surface (surface facing right) of the rectangle in the drawing. It is larger than the layer thickness t3b (t3b <t3a).

  For example, as shown in FIG. 14B, the timepiece display plate 150 includes a polycarbonate plate 151 such that the front surface 152 is on the lower side in the direction of gravity and the back surface 153 is on the upper side in the direction of gravity. Further, the polycarbonate plate 151 is inclined by an angle θ (θ = 20 [deg] to 45 [deg]) with respect to the horizontal plane, and in this state, printing or painting is performed on the back surface 153 on which the uneven shape 154 is formed. The colored layer 161 is formed by technology and left as it is for a predetermined time, so that the colored layer 161 is a relatively thick layer (layer thickness t3a) on the surface to be the receiving surface (the left surface in FIG. 13B). ), A vertically thin surface (layer thickness t3b) which is a surface covering like a bag (the surface on the right side in FIG. 13B), and the timepiece display board 150 shown in FIG. Can be formed.

  As described above, when forming the difference in the layer thickness t according to the direction of the surface connecting the convex portion and the concave portion, as shown in FIG. 14, the inclined state after the colored layer 161 is formed. The difference between the thick layer (layer thickness t3a) and the thin layer (layer thickness t3b) is further increased by heating at a temperature of 60 to 80 [° C.] for 30 [minutes] to 1 [hour]. be able to.

  According to the timepiece display board 150 of the fourth embodiment configured as described above, in addition to the function and effect of the timepiece display board 150 of the first embodiment, the uneven shape 154 formed on the polycarbonate plate 151 is symmetrical. Even if it has uniformity, the thickness t3 of the colored layer 161 becomes asymmetrical or non-uniform depending on the direction of the slope or vertical surface, so that the reflected light emitted toward the viewer The contrast (shading difference) differs depending on the direction of the light, and the shade of the reflected light can be changed according to the viewing angle of the viewer, thereby ensuring a more diverse design.

  As is clear from the method of forming the colored layer 161 shown in FIG. 14, the timepiece display board 150 of the fourth embodiment has a striped pattern (FIG. 4B) or a lattice-like geometric pattern (FIG. 6). It is suitable for the case in which the direction in which the lines extend is straight, as in (a)).

  That is, as shown in FIG. 14, in the method of forming the difference in the layer thickness t according to the direction of the surface by inclining the polycarbonate plate 151, the streaks extend in the direction orthogonal to the inclining direction. For this purpose, the direction in which the lines extend is changed, for example, a circle pattern (FIG. 5 (a)) that forms concentric lines, or a spiral pattern (FIG. 5 (b)) that forms spiral lines, A stripe pattern or a lattice-like geometric pattern in which the lines extend in a straight line is more suitable than the pattern (FIG. 4A) that becomes a radial line.

  Note that, in the above-described watch display board 150 having a stripe pattern or a lattice-like geometric pattern, a uniform layer thickness t can be formed along the direction in which the lines extend.

(Modification)
As shown in FIG. 14, the timepiece display board 150 of the fourth embodiment shown in FIG. 13 is inclined in a direction orthogonal to the direction in which the convex portions of the concavo-convex shape 154 extend (matches the direction in which the lines extend). Thus, a portion of the colored layer 161 corresponding to a surface (such as a slope having a triangular cross-sectional contour or a vertical surface having a rectangular cross-sectional contour) connecting the concave and convex portions of the concave and convex shape 154 on the back surface 153 of the polycarbonate plate 151. The layer thickness t3 of the portion corresponding to the surface (slope) connecting the concave portion and the convex portion of the concavo-convex shape 154 is changed as follows. The formation method of the colored layer 161 for making it differ according to the direction of the slope is not limited to the method shown in FIG. 14, and for example, as shown in FIG. Around By also possible to apply the forming method utilizing centrifugal force F acting radially outward of the polycarbonate plate 151.

  The watch display plate 150 is formed with a small hole H through which a shaft of a pointer (hour hand, minute hand, second hand, etc.) passes in the center thereof. In the small hole H, rotational driving means such as a motor is provided. The polycarbonate plate 151 can be rotated around its center C by being fixed through the shaft.

  That is, similarly to Embodiments 1 to 4, the colored layer 161 is formed on the back surface 153 of the polycarbonate plate 151 on which the concavo-convex shape 154 is formed by screen printing using a two-component curing type epoxy color ink, and immediately after that. The polycarbonate plate 151 is fixed to the shaft through a small hole H in the shaft of the rotation driving means with the back surface 153 facing upward, and the rotation driving means is rotated at a rotational speed of, for example, 100 to 120 [rpm]. The flow of the ink is improved by heating and drying at a temperature of 60 to 80 [° C.] for 30 [minute] to 1 [hour] while being rotated at a temperature, and the concave portion of the uneven shape 154 is caused by the centrifugal force F acting on the ink by the rotation. 15 connecting the surface and the convex portion (such as a slope with a triangular cross-sectional outline or a vertical surface with a rectangular cross-sectional outline. In FIG. The thickness t3a of the colored layer 161 on the side facing the inner side in the radial direction is thicker than the layer thickness t3b of the colored layer 161 on the side facing the outer side in the radial direction. Can do.

  Thereby, also by the timepiece display board 150 of the modified example, similarly to the timepiece display board 150 of the fourth embodiment, the layer thickness t3 of the colored layer 161 in the portion connecting the convex portion and the concave portion of the concavo-convex shape 154 is changed. Depending on the direction of the portion connecting the convex portion and the concave portion, it can be different, and the thickness t3 of the colored layer 161 is asymmetrical or non-uniform so that it is emitted toward the viewer. Depending on the direction of the reflected light, the contrast (shading difference) varies, and the shade of the reflected light can be changed according to the viewing angle of the viewer, thereby ensuring a more diverse design.

  In addition, according to the watch display board 150 of this modification, the difference in the layer thickness t of the colored layer 161 is made using the action of the centrifugal force F directed outward in the radial direction of the polycarbonate plate 151, so that the uneven shape 154 It is preferable that the convex part extends in a direction orthogonal to the radial direction.

  That is, as the concavo-convex shape 154, a circle pattern shown in FIG. 5A or a spiral pattern shown in FIG. 5B in which convex portions extend along a circumferential direction that is a direction orthogonal to the radial direction is applied. It is preferable to do.

  In addition to the operations and effects of the timepiece display board 150 of the first embodiment, the timepiece display board 150 of this modification also has the same operations and effects as the timepiece display board 150 of the above-described fourth embodiment. Obtainable.

(Embodiment 5)
FIG. 16 is a cross-sectional view corresponding to FIG. 5 showing the timepiece display panel 150 of the fifth embodiment used in the timepiece 200 shown in FIG.

  In the watch display board 150 according to the fourth embodiment and its modification, the projections and depressions of the concavo-convex shape 154 formed on the back surface 153 of the polycarbonate plate 151 are symmetric with respect to each other (in FIG. The uneven shape 154 of the cross-sectional outline triangle in FIG. 13A is formed in an isosceles triangle in which the triangle is symmetrical) and has a difference in the layer thickness t of the colored layer 161. As a method of forming a difference in the layer thickness t, the polycarbonate plate 151 is inclined (Embodiment 4) or rotated (Modified Example of Embodiment 4), but the implementation shown in FIG. The display panel 150 for timepiece of the form 5 does not perform such a process, and the layer thickness t of the colored layer 161 in the portion (slope) connecting the convex portion and the concave portion of the concavo-convex shape 154 is determined as follows. Depending on the part of the direction that connects the parts and the recess is obtained by different.

  That is, the timepiece display plate 150 shown in FIG. 16 has a cross-sectional outline of, for example, a triangular shape, and the convex and concave portions of the concave and convex shape 154 are not line symmetric (asymmetrical in FIG. 16). 154, which is formed so that the inclination angle of the portion connecting the convex portion and the concave portion differs depending on the direction (the slope on the right side of the cross-sectional outline triangle is a vertical surface) Is formed with an inclination of an angle α1 [deg] (0 <α1 <90; for example, α1 = 20 to 60 [deg]), and the inclined surface on the left side in the figure is an angle α2 [deg] (0 ≦ α2) with respect to the vertical plane. <Α1; for example, α2 = 0 to 5 [deg]).

  When the colored layer 161 is formed on the polycarbonate plate 151 having the concavo-convex shape 154 formed on the back surface 153, the ink described in the second embodiment is applied to the concavo-convex shape, heated, and the like to be fluid. 16, due to the weight of the ink, as shown in FIG. 16, the surface of the ink itself has a bilaterally symmetric outline, but the inclination angle of the slope connecting the convex and concave portions of the concave and convex shape 154 Therefore, the layer thickness t of the colored layer 161 with respect to this slope is different between the left and right slopes, and the layer thickness t3b on the right slope (slope of angle α1 with respect to the vertical plane) is relatively gentle. Can be made thinner (t3b <t3a) than the layer thickness t3a on the left slope (slope of angle α2 with respect to the vertical plane) with a relatively steep slope, and the polycarbonate plate 151 can be tilted. The uneven shape 154 having a different layer thickness t can be formed in accordance with the direction of the inclined surface, similarly to the watch display board 150 of the fourth embodiment or its modification, without being inclined or rotated.

  As the difference between the angle α1 and the angle α2 is increased, the contrast (shading difference) of the pattern according to the uneven shape 154 visually recognized on the front surface 152 of the timepiece display board 150 may be increased. it can.

  Further, the pitch L1 between the convex portions of the concavo-convex shape 154 and the height L2 of the convex portion with respect to the concave portions may be set to have regularity or may be irregular.

  According to the timepiece display board 150 of the fifth embodiment configured as described above, in addition to the operation and effect of the timepiece display board 150 of the first embodiment and the like, the layer thickness t of the colored layer 161 is continuously changed. Therefore, it is possible to form a clock display board 150 that has been made to appear, and in the conventional methods such as screen printing, offset printing, pad printing, etc., it is difficult to realize a shadow expression or gradation (such as a clock dial that is difficult to realize). A white butterfly shell or abalone shell that can be easily and inexpensively realized as a pattern of concavo-convex shape and has no regularity in the repetition of unevenness as the uneven shape 154 formed on the back surface 153 of the polycarbonate plate 151. A pattern with a pattern such as a leaf, a flower, etc. (for example, see FIGS. 17A and 17B) can be applied. A display panel for a timepiece that has been, it is possible to provide a low cost.

  Furthermore, by making the layer thickness t of the colored layer 161 different for each part (position) of the timepiece display plate 150, the color expression range can be expanded.

  Since the light transmittance is increased in the portion where the layer thickness t of the colored layer 161 is thin, the layer thickness t is uniform as in the conventional case as the timepiece dial 150 of the timepiece 100 having the solar cell 130. While ensuring the same light transmittance as when forming a colored layer, the color of the pattern such as the Asahi light pattern can be made deeper, especially in the case of using dark colors such as black and blue Can be obtained.

  In addition, since the contrast (darkness difference) can be increased by the colored layer 161, it is possible to form a lighter (lighter) part lighter and a darker part darker, and the colored layer 161 can be made of gold powder, silver powder or the like. In addition, the limitation on the addition rate when adding selenium is reduced, and it is possible to provide a high-quality watch display board 150 rich in color variations by enabling shading and gradation expression. became.

  Further, even if the solar cell 130 disposed on the lower side of the watch display board 150 exhibits a characteristic dark purple color, the watch display board 150 has a lighter portion with a lighter color and a darker portion. Since it is deeply formed, it becomes difficult to identify the outline of the outer shape of the solar cell that passes through the timepiece display plate 150, and the presence of the solar cell 130 can be easily concealed.

(Embodiment 6)
18 to 20 show the hue of the first colored layer 161 along the lower surface 163 of the colored layer 161 (hereinafter referred to as the first colored layer 161) in the timepiece display board 150 of the first to fifth embodiments. FIG. 7 is a cross-sectional view corresponding to FIG. 2, showing a watch display plate 150 of Embodiment 6 provided with a colored layer 171 (hereinafter, referred to as a second colored layer 171) having light transmittance of another hue different from FIG. .

  Here, what is shown in FIG. 18 is a watch display plate 150 to which a concave and convex shape 154 formed on the back surface 153 of the polycarbonate plate 151 has a triangular cross-sectional outline, and FIG. For the first colored layer 161, the layer thickness t2 of the portion corresponding to the convex portion of the concavo-convex shape 154 is formed thinner than the layer thickness t1 of the portion corresponding to the concave portion, and the second colored layer 171 In contrast to the first colored layer 161, the layer thickness t5 of the portion corresponding to the convex portion of the concavo-convex shape 154 is formed thicker than the layer thickness t4 of the portion corresponding to the concave portion.

  On the other hand, FIG. 6B shows that for the first colored layer 161, the layer thickness t2 of the portion corresponding to the convex portion of the concavo-convex shape 154 is formed thicker than the layer thickness t1 of the portion corresponding to the concave portion. Contrary to the first colored layer 161, the colored layer 171 is formed by forming the layer thickness t5 corresponding to the convex portion of the concavo-convex shape 154 thinner than the layer thickness t4 corresponding to the concave portion. .

  Further, what is shown in FIG. 19 is a timepiece display board 150 to which a concave and convex shape 154 formed on the back surface 153 of the polycarbonate plate 151 has a rectangular cross-sectional outline, and FIG. For the first colored layer 161, the layer thickness t2 of the portion corresponding to the convex portion of the concavo-convex shape 154 is formed thinner than the layer thickness t1 of the portion corresponding to the concave portion, and the first colored layer 171 In contrast to the colored layer 161, the layer thickness t5 of the portion corresponding to the convex portion of the concavo-convex shape 154 is formed thicker than the layer thickness t4 of the portion corresponding to the concave portion.

  On the other hand, FIG. 6B shows that for the first colored layer 161, the layer thickness t2 of the portion corresponding to the convex portion of the concavo-convex shape 154 is formed thicker than the layer thickness t1 of the portion corresponding to the concave portion. Contrary to the first colored layer 161, the colored layer 171 is formed by forming the layer thickness t5 corresponding to the convex portion of the concavo-convex shape 154 thinner than the layer thickness t4 corresponding to the concave portion. .

  According to the watch display board 150 of the sixth embodiment configured as described above, in addition to the functions and effects corresponding to each of the first to fifth embodiments, a difference is given to the hue for each portion of the concavo-convex shape 154. It is possible to change the hue change continuously as a gradation.

  Also, what is shown in FIG. 20 (a) is a watch display plate 150 to which a concavo-convex shape 154 formed on the back surface 153 of the polycarbonate plate 151 has a triangular cross-sectional outline, and is the first colored As for the layer 161, the layer thickness t3a corresponding to the slope on the left side of the triangle in the drawing corresponds to the slope on the right side of the triangle in the drawing among the surfaces (slopes) connecting the concave and convex portions of the concavo-convex shape 154. It is larger than the layer thickness t3b of the portion (t3b <t3a). On the other hand, the second colored layer 171 laminated on the first colored layer 161 has a surface (slope surface) connecting the concave and convex portions of the concave and convex shape 154. ) Of the portion corresponding to the slope on the left side of the triangle in the figure is smaller than the layer thickness t6b of the part corresponding to the slope on the right side of the triangle in the figure (t6a <t6b) It is.

  20 (b) is the same as that shown in FIG. 20 (a) except that a concave / convex shape 154 formed on the back surface 153 of the polycarbonate plate 151 has a rectangular cross-sectional profile. This is the same as the display panel 150 for use.

  According to the timepiece display board 150 of the sixth embodiment configured as described above, in addition to the functions and effects corresponding to the first to fifth embodiments, for each portion connecting the convex and concave portions of the concave and convex shape 154. A difference can be given to the hue, and the change in the hue can be continuously changed as a gradation.

  As an example of the formation of two colored layers in Embodiment 6, in each of FIGS. 18 to 20, blue is first printed as the first colored layer 161 on the back surface 153 of the polycarbonate plate 151, and then the second colored layer is printed. When yellow was printed as the layer 171 and then mounted on the watch as the watch display plate 150, the color tone of the watch display plate 150 was viewed as green when viewed from the viewer side.

  In the case of FIG. 18, the thin portion was visually recognized as a light blue in the portion overlapping the vertical direction, and the thick portion as a dark blue. Compared with printing using only the green ink in the second embodiment, a green color with a slightly frosted tone is obtained, and the texture of the plastic of the polycarbonate plate 151 is retreated, thereby increasing the sense of quality. A display board was obtained.

  As described above, the sixth embodiment has been described with respect to the content of forming the colored layer by two layers. However, although not illustrated, it is naturally possible to form the colored layer by three or more layers.

(Embodiment 7)
In FIG. 21, a single colored layer 161 is not formed over substantially the entire back surface 153 of the polycarbonate plate 151, but the uneven shape 154 formed in a partial region of the back surface 153 of the polycarbonate plate 151. The first colored layer 161 is formed substantially in the same manner as in the other embodiments, and the first colored layer 161 is formed in another region of the back surface 153 of the polycarbonate plate 151 where the first colored layer 161 is not formed. It is the timepiece display board 150 of the embodiment in which the second colored layer 171 is formed substantially along the uneven shape 154.

  As described above, the timepiece display according to the seventh embodiment, in which two or more colored layers 161 and 171 having different hues are formed in a parallel arrangement in a region in the surface where the back surface 153 of the polycarbonate plate 151 extends. According to the plate 150, in addition to the operation and effect of the timepiece display plate 150 of the first embodiment and the like, it is possible to obtain reflected light of different hues for each region, and the variety of designs as the timepiece display plate 150. Can be further expanded.

(Embodiment 8)
FIG. 22 shows a timepiece display board according to the sixth embodiment, further comprising a transmission type reflection plate 181 on the opposite side of the colored display layer 161 from the polycarbonate plate 151 in the timepiece display board 150 according to the first to seventh embodiments. FIG. 3 is a cross-sectional view corresponding to FIG.

  Here, the transmissive reflective plate 181 is a plate-like body having a light transmitting property and a surface 182 facing the colored layer 161 (hereinafter referred to as an upper surface 182) formed on a reflective surface that is specularly reflected. is there.

  The reflection surface of the upper surface 182 is formed so as not to reflect all of the reached light but to reflect a part of the reached light and make the other part enter the inside of the transmissive reflector 181. Has been.

  According to the timepiece display plate 150 of the eighth embodiment configured as described above, the light emitted from the lower surface 163 of the colored layer 161 reaches the upper surface 182 of the transmissive reflective plate 181, and is reflected by the reflective surface of the upper surface 182. A part of the light is reflected and a part of the light is transmitted through the colored layer 161 and the polycarbonate plate 151. Therefore, the colored layer 161 that is visually recognized by the viewer from the front surface 152 of the polycarbonate plate 151 is more It can be made brighter, and the pattern exhibited by the reflected light reflected by the colored layer 161 can be made clearer.

  Note that the transmissive reflective plate 181 is formed as a reflective surface (mirror surface) whose upper surface 182 is specularly reflected, and a surface 183 opposite to the upper surface 182 facing the colored layer 161 (hereinafter referred to as a lower surface 183) is shown in FIG. As shown in FIG. 4, it is more preferable that the light source is formed as a diffuse reflection part that diffuses and reflects light.

  Here, the diffuse reflection part may be formed by, for example, fine unevenness, or may be formed by mixing silica particles or bead particles in ink or paint. . In addition, as the hue of the ink in which silica particles or bead particles are mixed, a dark hue such as black or amber is preferable from the viewpoint of effectively obtaining the effect of diffuse reflection.

  According to the timepiece display plate 150 of the eighth embodiment that is preferably formed in this way, the light that has passed through the transmission type reflection plate 181 and exited from the lower surface 183 is arranged on the back side of the timepiece display plate 150. A part of the light reaching the solar cell 130 is reflected by the surface of the solar cell 130 and travels toward the transmission type reflector 181, but the advanced light is transmitted through the transmission type When reaching the lower surface 183 formed as the diffuse reflection portion of the reflection plate 181, at least a part is diffusely reflected by the lower surface 183 of the diffusion reflection portion, so that the colored layer 161 and the polycarbonate plate 151 are transmitted, and the polycarbonate plate The amount of light emitted from the front surface 152 of 151 decreases, and the color of the solar cell 130 (reflection) changes to the color of the colored layer 161 (the color not absorbed by the colored layer 161). Is color) is not easily mixed, it is possible to prevent the color of the colored layer 161 (the color that is not absorbed by the colored layer 161) becomes cloudy.

  In the timepiece 200 shown in FIG. 1, the timepiece display board 150 of the first embodiment is replaced with the timepiece display board 150 of the second to eighth embodiments, which is an embodiment of the timepiece according to the present invention.

  As described above in detail, in the timepiece display panel according to the present embodiment, one surface (the surface opposite to one surface) is formed on a smooth surface transferred from a resin mold or the like, The other surface (one surface) is formed in a fine concavo-convex shape and diffuses part of the light incident from the one surface on the other surface and the other part of the light incident from the one surface A plate-shaped light transmission plate that emits light from the other surface, and a colored layer having a light transmission property that is formed substantially along the concave-convex shape, while using a light-transmitting resin for the substrate. Thus, a timepiece display plate having a texture and a high-class feeling comparable to those obtained when a metal substrate was used was obtained.

  In addition, by forming the colored layer in a shape corresponding to the uneven shape described above, the layer thickness is different and the layers are continuously formed, which is technically difficult when simply formed on a flat plate. It is possible to easily form a colored layer with varying thickness, and it is possible to form a colored layer that accurately corresponds to the concavo-convex shape, which often serves as a pattern surface in addition to the light diffusion effect. As a result, it has become possible to provide a display panel for a watch that shows a clear pattern and is excellent in hue and design variations at a low cost.

  Furthermore, the effect of the reflection effect by providing a light transmission plate with a mottled pattern-like colored layer with a large shading difference, and a transmission type reflection plate on the opposite side of the light transmission plate across the colored layer In addition, a solar watch display plate was obtained in which the dark purple color of the solar cell was difficult to see.

130 Solar Cell 150 Watch Display 151 Polycarbonate Plate (Light Transmission Plate)
152 Front side (one side)
153 Back side (the other side)
154 Concave and convex shape 161 Colored layer, first colored layer 162 Upper surface 163 Lower surface 171 Second colored layer 181 Transmission type reflector 200 Watch

Claims (14)

One surface is formed in a fine concavo-convex shape, and a part of the light incident from the surface opposite to the one surface is diffused by the opposite surface and the other light incident from the one surface is diffused. A plate-shaped light transmission plate that emits the part from the opposite surface;
A timepiece display board, comprising: a colored layer having light transparency, which is formed substantially along the uneven shape.   2. The timepiece display panel according to claim 1, wherein the colored layer has a different layer thickness for each portion corresponding to the uneven shape.   3. The timepiece display according to claim 2, wherein the colored layer in the portion connecting the convex and concave portions having the concavo-convex shape has a different layer thickness for each direction of the connecting portion. Board.   The concavo-convex shape has a triangular cross-sectional outline, and the colored layer is a portion corresponding to a convex portion of the triangle and a concave portion between the triangles, and the layer thickness thereof is different. Item 4. The timepiece display board according to Item 2 or 3.   4. The uneven shape has a rectangular cross-sectional outline, and the colored layer has a layer thickness different between the rectangular convex portion and the concave portion between the rectangles. Display board for clocks as described in 1.   The said colored layer consists of two or more colored layers from which a hue mutually differs, These two or more colored layers are laminated | stacked on the layer thickness direction, The any one of Claim 1 to 5 characterized by the above-mentioned. The clock display board as described in the item.   The colored layer is composed of two or more colored layers having different hues, and the two or more colored layers are formed in a parallel arrangement in a region within the one surface of the light transmission plate. The timepiece display board according to claim 1, wherein the timepiece display board is characterized in that:   The timepiece display plate according to any one of claims 1 to 7, further comprising a transmission type reflection plate on a side opposite to the light transmission plate with the colored layer interposed therebetween.   The surface of the transmissive reflection plate facing the colored layer is a mirror surface, and the surface opposite to the surface facing the colored layer is formed as a diffuse reflection portion that diffuses and reflects light. The timepiece display board according to 8.   10. The timepiece display panel according to claim 9, wherein the diffuse reflection part is a mixture of ink particles or ink particles with silica particles or bead particles.   The timepiece display board according to claim 1, wherein the uneven shape represents a pattern of the timepiece display board.   12. The timepiece display plate according to claim 1, wherein the light transmission plate and the colored layer have substantially the same refractive index.   13. The timepiece display panel according to claim 1, wherein a thickness of the colored layer is smaller than a depth of the uneven shape.   A timepiece display board according to any one of claims 1 to 13, and a solar cell disposed on a side of the timepiece display board opposite to the light transmission plate with the colored layer interposed therebetween. A watch characterized by comprising: