HK1050734B - Timepiece dial - Google Patents

Description

Dial for clock

Technical Field

The present invention relates to a timepiece dial, and more particularly to a timepiece dial for solar cells or electroluminescence and a method of manufacturing the timepiece dial.

Background

As a technique for expressing a metallic feeling on a timepiece dial for a solar cell without seeing a dark purple color of the solar cell, a conventional structure shown in fig. 49 is known. The dial for a timepiece has a structure in which a mold 2 having a plurality of small holes 2a provided at equal intervals is formed on the lower surface of a transparent substrate 1 made of a transparent plastic plate or the like. And the pores 2a are smaller than 30 μm. If the size of the pinhole is less than 30 μm, the pinhole itself is hardly visible, and therefore, the solar cell itself disposed therebelow is also completely invisible.

As shown in fig. 50, the solar cell for a timepiece is generally formed in 4 quarter surfaces, i.e., a1, a2, A3, and a4, and is disposed on the lower surface side of the dial plate. The light transmitted from the dial plate is uniformly emitted to 4 surfaces. By providing the small holes 2a at equal intervals, the transmitted light is uniformly radiated to the solar cells divided into four equal parts. The small holes 2a are arranged at equal intervals, and the total area of the small holes 2a is set within the range of 25-50% of the area of the dial plate. When the total area of the pores 2a is 25%, the transmittance can be ensured at 25%, and a sufficient power generation amount can be obtained. When the total area of the pores 2a exceeds 50%, the solar cell is seen to have a deep purple color.

When this type of dial for a timepiece for a solar cell is manufactured, the number of manufacturing steps is large, and the manufacturing cost is very high. Further, since the small hole is very small, it is difficult to process the hole with high accuracy. Therefore, the finished product has low qualification rate and cannot adapt to batch production. Further, since the etching liquid and the stripping liquid are used, it cannot be said that this is a suitable operation for the body.

In view of the above problems, it is an object of the present invention to provide a dial for a timepiece that can be manufactured with ease and at low cost, can be manufactured with high precision, and can be manufactured under safe work without damaging the body, and a method for manufacturing the dial.

Disclosure of Invention

The invention provides a timepiece dial, comprising: the solar cell module comprises a transparent substrate having an upper surface on the dial plate surface side and a lower surface on the solar cell side, and continuous concave-convex portions formed on the lower surface, wherein a non-transparent film is formed on the inner surface of each concave portion, the convex surfaces of the convex portions are exposed to form transparent surfaces, and the ratio of the total area of the transparent surfaces to the area of the upper surface of the substrate is 20% to 50%.

The non-transmissive film of the timepiece dial has light reflectivity.

The uneven portion of the timepiece dial forms a predetermined pattern.

The timepiece dial has a colored substrate.

The convex surface of the convex portion of the timepiece dial is a smooth surface.

The uneven portion of the timepiece dial has a wave shape with a trapezoidal cross section.

The timepiece dial further includes a colored transparent film formed on the lower surface side of the non-transparent film of the recess.

The timepiece dial has a concave-convex pattern formed on an upper surface of the base plate.

The concave portion of the timepiece dial has a hemispherical concave surface for incident light.

The non-permeable film of the timepiece dial is a mold.

The non-permeable film of the timepiece dial is a paint film.

The concave and convex portions of the timepiece dial are arranged at a constant interval.

The timepiece dial has an ultraviolet absorber incorporated in a transparent substrate.

The upper surface of the transparent substrate of the timepiece dial is a smooth surface.

The timepiece dial has a transparent substrate formed on the uneven portion of the lower surface.

The timepiece dial has a plurality of lenses formed on an upper surface of the base plate at portions facing the hemispherical concave surfaces.

Drawings

FIG. 1 is an enlarged partial cross-sectional view of a timepiece dial according to embodiment 1 of the invention,

FIG. 2 is an enlarged perspective view of the dial for a timepiece shown in FIG. 1 as viewed from the lower side,

FIGS. 3a to 3e are process explanatory views for explaining the manufacturing method,

FIG. 4 is an explanatory view showing another method of manufacturing a timepiece dial,

FIG. 5 is an enlarged partial cross-sectional view of a timepiece dial according to embodiment 2 of the invention,

FIG. 6 is an enlarged perspective view of a main part of the timepiece dial as viewed from below,

FIGS. 7a to 7d are process explanatory views for explaining the manufacturing method,

FIG. 8 is an enlarged partial cross-sectional view of a timepiece dial according to embodiment 3 of the invention,

FIGS. 9a to 9d are process explanatory views for explaining the method of manufacturing the timepiece dial,

FIG. 10 is an enlarged partial cross-sectional view of a timepiece dial according to embodiment 4 of the invention,

FIG. 11 is a plan view of the dial for a timepiece as seen from below,

FIGS. 12 to 14 are explanatory views showing a manufacturing method,

FIG. 15 is a partial cross-sectional view of a dial for a timepiece according to embodiment 5 of the invention,

FIGS. 16 to 18 are explanatory views showing a manufacturing method,

FIG. 19 is a partial cross-sectional view of a timepiece dial according to embodiment 6 of the invention,

figures 20a and 20b are top views of the lenticules,

FIG. 21 is a partial cross-sectional view of a timepiece dial according to embodiment 7 of the invention,

FIG. 22 is a schematic view for explaining a bent state of light reflected by a microlens,

FIG. 23 is an enlarged partial cross-sectional view of a timepiece dial according to embodiment 8 of the invention,

FIG. 24 is an enlarged sectional view of a key part of a mold used in the manufacture of the dial for a timepiece,

FIG. 25 is an enlarged partial cross-sectional view of a timepiece dial according to embodiment 9 of the invention,

FIG. 26 is a sectional view showing a letter plate portion according to embodiment 10 of the invention,

FIG. 27 is an enlarged view of a key part of a timepiece dial showing the 10 th embodiment,

FIGS. 28a to 28d are views showing a process for manufacturing a timepiece dial plate according to embodiment 10,

FIGS. 29 and 30 are views showing a method of forming a pattern on a timepiece dial using a copy paper,

FIG. 31 is an enlarged partial cross-sectional view of a timepiece dial showing an 11 th embodiment of the invention,

FIGS. 32a to 32d are views showing a process for manufacturing a timepiece dial plate according to embodiment 11,

FIG. 33 is an enlarged partial cross-sectional view showing an example of a timepiece dial provided with a protective film according to embodiment 12 of the invention,

FIGS. 34a to 34e show a process for manufacturing a timepiece dial plate according to embodiment 12,

FIG. 35 is an enlarged partial cross-sectional view showing another example of a timepiece dial having a protective film according to embodiment 12,

FIG. 36 is an enlarged partial cross-sectional view showing a timepiece dial having a case layer according to embodiment 13 of the invention,

FIGS. 37a to 37e are views showing a process for manufacturing a timepiece dial of embodiment 13,

FIG. 38 is an enlarged partial cross-sectional view showing a timepiece dial plate provided with a case layer and a protective film according to embodiment 13,

FIG. 39 is an enlarged partial cross-sectional view showing a timepiece dial provided with a golden color containing layer according to embodiment 14 of the invention,

FIGS. 40 and 41 are views showing a method of forming a pattern on a timepiece dial by a transparent film using a copy paper,

FIG. 42 is an enlarged partial cross-sectional view showing a timepiece dial provided with a golden color containing layer and a protective film according to embodiment 14 of the invention,

FIG. 43 is a view showing a copy sheet used for forming a pattern on a timepiece dial of the present invention,

FIG. 44 is a view showing a method of manufacturing the replica sheet of FIG. 43,

FIG. 45 is a view showing a method of forming a pattern on a timepiece dial of the present invention using a copy sheet,

FIG. 46 is a sectional view showing a state after reproduction,

fig. 47 and 48 are sectional views showing modifications of the 14 th embodiment.

FIG. 49 is an enlarged sectional view of a key part of a conventional timepiece dial,

fig. 50 is a front view of the solar cell for a timepiece.

Best mode for carrying out the invention

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a dial for a timepiece and a method of manufacturing the dial according to embodiment 1 of the present invention will be described with reference to fig. 1 to 4.

In fig. 1, a dial 10 includes a permeable substrate 11 made of plastic or the like having a convex portion 11a and a concave portion 11b formed on the lower surface thereof, and a metal impermeable film 12 formed on the surface of the concave portion 11 b. The non-transmissive film 12 is not formed under the convex portion 11a, and the portion transmits light.

As shown in fig. 2, the projections 11a are in a grid shape, and the lower surfaces 11a1 of the projections 11a are polished to expose the transparent substrate 11, and further to be smooth surfaces. The height h of the projection 11a is at least 10 μm, and the width t of the lower surface 11a1 is at least 70 μm. The total area of the polished lower surface 11a1 is within a range of 20 to 50% of the area of the upper surface side of the permeable substrate 11.

The metal non-transmissive film 12 is a metal vapor deposition film formed of a metal by a vapor deposition method and has a thickness of a degree of light-impermeability. The non-transmissive film 12 is not particularly limited to metal, and a coating film having a thickness of a degree of light-impermeability may be formed by printing or coating.

In the dial 10 having the above-described configuration, the light cannot be transmitted through the concave portion 11b due to the provision of the non-transmissive film 12, but a reflection action is generated, and the color tone of the non-transmissive film is recognized. The light is transmitted through the convex portion 11a and enters a solar cell (not shown) disposed below the convex portion. Further, since the lower surface 11a1 of the projection 11a is a smooth surface, the light is incident on the solar cell without scattering, and the incidence rate can be increased.

Further, although light is transmitted through the convex portion 11a, the width of the lower surface 11a1 is very small, and thus the solar cell is hardly seen in a deep purple color. When the transparent substrate 11 is slightly colored, if the width t of the lower surface 11a1 is 70 μm or less, the solar cell is hardly seen to have a deep purple color. Particularly, if the thickness is 30 μm or less, the transparent substrate is not seen at all.

Further, the concave portions 11b and the convex portions 11a are formed in parallel at a predetermined interval on the lower surface side, and the total area of the lower surfaces 11a1 of the convex portions 11a is within the range of 20 to 50% of the area formed on the upper surface side of the dial 10, so that a sufficient amount of light can be supplied to the solar cell for power generation. That is, in recent solar cells, sufficient power generation capacity can be obtained at a transmittance of at least about 20%. Thus, if the total area of the bottom surface 11a1 as the transmission part has an area of 20% on the top surface side, a transmittance of 20% can be obtained, and a light amount that is not an obstacle to power generation can be obtained. When the total area of the lower surface 11a1 exceeds 50% of the area of the upper surface side, the effect of the non-permeable film is not significant, and the solar cell is clearly seen as dark purple. Thus, by controlling the total area of the lower surface 11a1, which is the transmissive portion, to be within the range of 20 to 50%, a sufficient amount of power generation can be obtained, and the non-transmissive film can sufficiently function, and the transmissive portion of the projection 11a can be completely invisible.

In the present embodiment, the concave-convex pattern is formed into a lattice pattern, but other patterns, such as various patterns, for example, a line pattern, a circle pattern, a sun pattern, a geometric pattern, and the like, may be selected as the pattern.

Next, a method for manufacturing the dial 10 having the above-described structure will be described with reference to fig. 3a to 4. First, fig. 3a shows a blank 11A of a transparent substrate 11 having a concave portion 11b and a convex portion 11A on the lower surface thereof, which is formed by injection molding. The blank 11A is molded by injecting a permeable resin into a mold under heat and pressure using an injection molding apparatus. The lower surface concave-convex portion is formed by copying from the concave-convex portion formed in the mold.

Next, as shown in fig. 3b, a non-permeable film 12 of a metal vapor deposition mold is formed by metal vapor deposition on the entire lower surface of the blank 11A. The metal vapor deposition mold is formed to a thickness of a degree of light impermeability (about 1000A)) Above).

As shown in fig. 3c, the lower surface of the convex portion 11a is polished to such an extent that the permeable substrate is exposed, and the non-permeable film 12 is removed, and the finished dial 10 is obtained on the smooth lower surface 11a 1. In addition, although the present embodiment is processed to a smooth surface by polishing, a diamond cutter or the like may be used to process to a smooth surface by cutting.

The above-described embodiment is a structure formed by injection molding using a mold in order to obtain a permeable substrate having irregularities on one surface, and as another method, there is a method shown in fig. 4. That is, the permeable plastic sheet 21 is placed on a flat table 22, and is pressed from above by a pressing tool 23 having irregularities 23a and 23b formed thereon under heating, whereby the same shape as the blank 11A of the permeable substrate 11 shown in fig. 3a can be obtained.

In the above manufacturing method, since the uneven portion of the transparent substrate is formed by copying the uneven shape formed on the mold or the pressing tool, the dimensional error and the shape error are small, and the precision is very stable. Further, not only can a mold or a press tool having a concave-convex shape be used for a long period of time, but also the manufacturing time is short, the mass productivity is excellent, and the processing cost is very low. Further, the processing method of the vapor deposition processing, the coating processing, and the polishing processing of the post-processing is simple, and the total processing time is also short, which also reduces the cost. Further, since the stripping solution, the etching solution, or the like, which has been conventionally used, is not used, it does not have adverse effects on the body.

In the present embodiment, the character plate is formed on the lower surface side of the uneven portion formed on the transparent substrate, but the character plate may be formed on the upper surface side of the uneven portion formed in a pattern, and the same effect can be obtained in this case.

Next, embodiment 2 of the present invention will be described with reference to fig. 5 and 6.

In fig. 5, the dial 30 includes a transparent substrate 31 having a concave portion 31b and a convex portion 31a formed on the lower surface side thereof, a transparent color decorative film 33 provided on the concave portion 31b, and a non-transparent film 32 laminated on the color decorative film 33.

The projection 31a has a step shape, and the lower surface 31a1 thereof is polished to expose the transparent substrate 31 and to form a smooth surface. The height h of the projection 31a is at least 10 μm and the width t of the lower surface 31a1 is 70 μm or less, as in example 1.

As shown in fig. 6, the convex portions 31a and the concave portions 31b are arranged in a circle at a constant interval to form a concentric pattern. The total area of the smooth lower surfaces 31a1 of the projections 31a is formed within a range of 20 to 50% of the area of the upper surface side of the transparent substrate 31.

The transparent color decorative film 33 is a film for applying color decoration and has transparency. This embodiment forms a very thin metal vapor deposition mold, but may also be a pattern having transparency.

The non-transmissive film 32 is a white paint film in the present embodiment, but may be a metal vapor deposition film formed to have a thickness of a degree of light-impermeability. In this embodiment, a metal vapor deposition film is used as the transparent color decorative film 33, and a white paint is used as the non-transparent film 32, but a combination of these may be used to achieve a metallic appearance and to improve the decorative effect. Even if the transparent colored decorative film of the paint is combined with the metal non-transparent film, the metal feeling can be expressed and the decoration can be improved.

The following describes a method of manufacturing the dial plate 30. Fig. 7a shows a blank 31A of a plastic permeable substrate 31 formed by injection molding using a mold. A concave portion 31b and a convex portion 31A having a triangular cross section are formed on the lower surface of the blank 31A. Further, as described in example 1 with reference to fig. 4, the plastic plate may be pressed under heating using a pressing tool provided with projections and depressions to form projections and depressions.

As shown in fig. 7b, a very thin metal vapor deposition is performed on the uneven surface of the blank 31A to form a transmissive color decorative film 33.

Next, as shown in FIG. 7c, a white paint is applied to the upper surface of the transparent colored decorative film 33 to form a non-transparent film 32.

Then, as shown in fig. 7d, the top of the convex portion 31A is partially cut by polishing with a polishing machine to expose the blank 31A, and the lower surface 31A1 of the convex portion 31A is processed into a smooth surface to obtain the dial 30.

After the above steps, the dial 30 shown in fig. 5 is formed. The width of the light-transmitting portion of the dial 30 is not more than 70 μm and is very narrow. Therefore, the dark purple of the solar cell disposed on the lower side thereof cannot be seen as dark purple. When the width is 30 μm or less, the transmitted portion itself cannot be seen, and therefore, the color tone of the solar cell cannot be seen at all. Further, since the circular patterns are formed at uniform intervals and the total area of the light transmission portions is in the range of 20 to 50%, a sufficient amount of power generation can be obtained, and the color decorative film and the non-transmission film are made to have very close color tone and the like in appearance, and the transmission portions are hardly visible.

In addition, as shown in the present example, the size of the light transmitting portion can be arbitrarily set by polishing by forming the convex portion into an inclined corrugated shape. This also makes it possible to easily form a width of 30 μm or less which is not visible at all.

Next, a timepiece dial according to embodiment 3 of the present invention will be described with reference to fig. 8.

The dial 50 has a concave portion 51b and a corrugated convex portion 51a on the lower surface thereof, and a transparent substrate 51 having a2 nd pattern 51d, a non-transparent film 52 provided on the concave portion 51b on the lower surface of the transparent substrate 51, and a transparent protective film 54 provided on the 2 nd pattern 51d on the upper surface of the transparent substrate 51 are provided thereon.

The lower surface 51a1 of the corrugated convex portion 51a provided on the lower surface side of the permeable substrate 51 is polished or cut to be a smooth surface, and the blank of the permeable substrate 51 is exposed.

The concave portions 51b and the convex portions 51a provided on the lower surface side of the transparent substrate 51 are arranged in a circular pattern at a constant interval in the same manner as the dial 30 of embodiment 2 shown in fig. 6.

In the present embodiment, the 2 nd pattern 51d provided on the upper surface side of the transparent substrate 51 is formed with a wrinkle pattern having minute irregularities, but the 2 nd pattern 51d may be selected from various patterns of various colors such as a sunlight pattern, various coil patterns, various geometric patterns, and the like, in addition to the wrinkle pattern.

The transparent protective film 54 provided on the 2 nd pattern 51d of the transparent substrate 51 is provided for protecting the 2 nd pattern 51d, and is formed by printing, coating, or the like using a paint such as a transparent urethane resin or an acryl resin. The upper surface of the transparent protective film 54 is polished and then processed into a glossy and smooth surface.

In this embodiment, the width of the smooth lower surface 51a1 of the convex 51a of the transparent substrate 51 is slightly smaller than that of the above-described embodiment 1 and embodiment 2, and is controlled to be 100 μm or less. If the 2 nd pattern has an uneven shape on the upper surface side of the transparent substrate, the solar cell is hardly seen in a deep purple color even if the width is 100 μm. Particularly, when the 2 nd pattern is a fine striped pattern, dark purple is not observed at all.

Further, since the total area of the smooth lower surface 51a1 of the convex 51a of the transparent substrate 51 is controlled to be in the range of 20 to 50% with respect to the area of the upper surface side, a sufficient amount of light is obtained, the color of the non-transparent film is not clearly visible, and the solar cell is hardly visible in deep violet.

In this embodiment, the 2 nd pattern 51d formed on the upper surface of the transparent substrate 51 is formed into a visible letter plate by the color tone of the non-transparent film 52 formed in the lower surface concave portion 51b of the transparent substrate 51.

The following describes a method of manufacturing the dial plate 50 having the above-described structure. As shown in fig. 9a, a blank 51A of a transparent substrate 51 is formed by injection molding, and the blank 51A has a concave portion 51b and a convex portion 51A having a corrugated shape on the lower surface and a2 nd pattern 51d having a corrugated pattern on the upper surface. The lower concave portions 51b and the wave-shaped convex portions 51a and the upper pattern 2 51d are formed by mold replication.

Next, as shown in fig. 9b, a non-permeable film 52 of a metal vapor deposition mold is formed on the surfaces of the uneven portions 51b and 51A of the blank 51A.

As shown in fig. 9c, a part of the top of the projection 51A is cut off to expose the blank 51A, thereby forming a smooth bottom surface 51A 1.

As shown in fig. 9d, a transparent protective film 54 is formed on the 2 nd pattern 51d by printing or painting, and the upper surface of the transparent protective film 54 is polished to a smooth surface, thereby obtaining the timepiece dial 50.

Fig. 10 shows embodiment 4 of the present invention. The timepiece dial 60 is composed of a plastic transparent substrate 61 and a metal reflective film 62. The plastic substrate 61 has a plurality of convex hemispherical surfaces 63 and a plurality of convex portions 64 formed on the lower surface thereof. The diameter of the convex hemispherical surface 63 is preferably about 50 to 150 μm. When the size of the convex hemispherical surface 63 is 50 μm or less, it is difficult to manufacture a mold, whereas when it exceeds 150 μm, the convex hemispherical surface 63 is conspicuous and the appearance is deteriorated.

As shown in fig. 14, the metal reflective film 62 is formed of a double-layer reflective film composed of a silver (Ag) deposited film 62a and a chromium (Cr) deposited film 62b for preventing discoloration of the silver deposited film 62 a. The thickness of the silver deposition film 62a is about 600 to 1000The thickness of the chromium deposited film 62b is about 300 to 500Degree of the disease.

Instead of the chromium deposited film 62b, a protective printed resin paint film or a double-layer reflective film composed of the silver deposited film 62a and the resin paint film may be used.

The metal reflection film 62 formed on the concave-convex portion 64 is removed by cutting, polishing, or the like, and then the light transmission portion 65 is formed.

The following describes a method of manufacturing the timepiece dial 60. As shown in fig. 12, a plastic substrate 61 is molded by injection molding or hot press molding, and a plurality of convex hemispherical surfaces 63 having mirror surfaces and a plurality of convex portions 64 are formed on the lower surface of the plastic substrate 61. The surface of the convex hemispherical surface 63 is mirror finished.

As shown in fig. 13, a metal reflective film 62 formed by metal vapor deposition is formed on the lower surface of the plastic substrate 61 on which the convex hemispherical surface 63 and the convex portion 64 are formed. As shown in fig. 14, the metal reflective film 62 is a double-layer reflective film composed of a silver deposited film 62a and a chromium deposited film 62 b. In the present embodiment, the metal reflective film 62 is formed of a double layer of the silver deposited film 62a and the chromium deposited film 62b, but in the case of using a metal having excellent corrosion resistance, the metal reflective film 62 may have a 1-layer structure. For example, when a metal reflective film is formed by applying a metal deposition film, a problem of corrosion hardly occurs, and a very bright golden brilliance can be obtained.

Of the metal reflection films 62, only the metal reflection film 62 formed at the tip end portion of the convex portion 64 is removed by cutting, grinding, or the like at a cutting line L as shown in fig. 14, and a light transmission portion 65 is formed.

The conventional aperture size is 30 μm or less, but by processing the shape utilizing the light re-returning property of the convex hemispherical surface shown in the present invention, the reflection of light can be increased, and thus the effect that the light transmission portion cannot be seen even if it is 100 μm in size is produced. Further, coloring the plastic substrate makes it more difficult to see and can sufficiently secure the power generation amount of the solar cell. Further, the light transmitting portion can be enlarged to a size of 100 μm, which facilitates the molding process.

Further, by forming a metal reflective film by metal vapor deposition on a convex hemispherical surface formed of a mirror surface, the metal reflective film is formed in a mirror surface state, and the reflectance of light can be further improved. Further, since the metal reflective film forms a concave hemispherical surface when viewed from above, the light returns after being reflected, and the light returns again, so that a very bright glow feeling can be produced. Further, the solar cell is less likely to be seen with a deep purple color due to the reflected light from the metal reflective film.

Fig. 15 is a partial cross-sectional view of a timepiece dial according to embodiment 5 of the present invention.

The timepiece dial 66 is constituted by a plastic transparent substrate 67, a metal reflective film 68, a light transmitting portion 70, and a transparent resin layer 71. The plastic substrate 67 has a plurality of concave hemispherical surfaces 67a and a plurality of convex portions 67b formed on the upper surface thereof, the concave hemispherical surfaces being formed of mirror surfaces. The concave hemispherical surface 67a and the convex portion 67b are preferably about 50 to 150 μm in size as in embodiment 4, in view of the requirement for copying from a mold and improving the appearance.

A metal reflective film 68 made of a silver deposited film is formed on the concave hemispherical surface 67a and the convex portion 67 b. The metal reflective film 68 formed on the convex portion 67b is removed to form a light transmitting portion 70, and a transparent resin layer 71 as a protective film is formed on the metal reflective film 68.

The method for manufacturing the timepiece dial will be described below. As shown in fig. 16, the plastic transparent substrate 67 is molded by injection molding or hot press molding, and a plurality of concave hemispherical surfaces 67a having a mirror surface and a plurality of convex portions 67b are formed on the upper surface of the plastic transparent substrate 67.

Next, as shown in fig. 17, a metal (silver) reflective film 68 formed by metal vapor deposition is formed on the concave hemispherical surface 67a and the convex portion 67b of the plastic substrate 67.

In the metal reflective film 68, only the reflective film formed on the convex portion 67b is removed by cutting, grinding, or the like, and a light transmitting portion 70 is formed. As shown in fig. 18, a transparent resin layer 71 is formed on the upper surface of the metal reflective film 68 by printing or painting.

The timepiece dial manufactured by the above method, like the timepiece dial of embodiment 4, has an effect that reflection of light is increased by forming a shape utilizing the light returnability of the concave hemispherical surface when viewed from above, and even a size of 100 μm is invisible. The size of the light transmitting portion can be enlarged up to 100 μm, facilitating the forming process while ensuring sufficient power generation. The reflecting film is in a mirror surface state, and acts to return light, so that a very bright and bright character plate can be used in a solar cell. With the reflected light from the reflective film, it is more difficult to see the dark purple color of the solar cell. Further, when the plastic substrate is thinly colored, it is more difficult to see.

Fig. 19 is a partial cross-sectional view of a timepiece dial according to embodiment 6 of the invention. As shown in fig. 19, a plurality of lenticular lens bodies 73 are formed on the upper surface of the plastic substrate 61 of the timepiece dial described in embodiment 4. The micro-convex lens body 73 is formed simultaneously with the convex hemispherical surface 63 by injection molding.

As shown in fig. 20a and 20b, the lenticular lens 73 may have various shapes such as a circle, a star, or a polygon (not shown). The micro-convex lens body 73 has a dimension D of about 50 to 200 μm and a thickness of 10 μm or more. Then, the stripe shape is formed at the same interval as the size. The size of the micro-convex lens body 73 is difficult to be smaller than 50 μm in view of the mold production or in view of the print forming method described later, and it can be said that 50 μm is a limit. When the thickness is larger than 200 μm, the lens body becomes too conspicuous and the appearance is not good. When the thickness is less than 10 μm, the bending dispersion effect is poor, and a bright brilliance cannot be obtained from any angle.

The micro-lenticular lens bodies 73 can be formed by printing in a subsequent process without using injection molding. In this case, the sectional shape of the lenticular lens 73 is a semicircular shape having a substantially elliptical shape, and the vertex is rounded.

Fig. 21 is a front sectional view of a timepiece dial of embodiment 7. As shown in fig. 21, a large number of dispersed minute lenticular lens bodies 73 are printed and formed on the transparent resin layer 71 of the timepiece dial described in embodiment 5. The details of the micro-convex lens body 73 are the same as those of the above-described embodiment 6, and therefore, the description thereof is omitted.

Fig. 22 is a schematic diagram illustrating a state of bending of light generated by the microlens. An external light A incident on a dial for a timepiece enters a plastic substrate 61, is reflected by a metal reflection film 62 made of a silver deposited film on the lower surfaces of a plurality of convex hemispherical surfaces 63, is collected by concave spherical surfaces, and is bent and dispersed at various angles by a micro-convex lens body 73, so that a bright brilliance is exhibited from any angle by a bent light C.

Fig. 23 shows an 8 th embodiment of the present invention, in which a pattern-like uneven portion is formed on the lower surface of a plastic transparent substrate 80, and a recessed portion 81 is formed in a stripe shape. After the bottom surface of the recess 81 is mirror-finished, a reflective film 82 is formed in the recess. The reflective film 82 is a non-transmissive portion formed with a non-transmissive thickness. The reflective film 82 is not limited to the vapor deposited film, and may be formed of a paint film. The lower surface of the transparent substrate 80 without the recessed portion 81 is a smooth surface and serves as a transparent portion 80 a.

The following describes a method of manufacturing the dial plate. The mold 83 shown in fig. 24 is formed with a convex portion 84 corresponding to the bottom surface of the concave portion of the dial plate, and the surface is finished into a mirror surface. Then, a letter plate blank having a concave-convex portion and composed of a permeable plastic substrate is formed by injection molding using the mold. Then, a reflective film is formed on any entire surface of the uneven portion of the blank. When the metal vapor deposition method is adopted, the thickness of the light-tight degree is 1000The above. The coating method is to form a reflective film by making the coating film to a thickness of a degree of not transmitting light. Then, the upper surface of the convex portion is polished until the transparent substrate is exposed, and the reflective film of the convex portion is removed, thereby forming a smooth transparent portion 80 a.

In the present embodiment, the light reflectance from the reflective film can be increased by making the lower surface to which the reflective film 82 is applied a mirror surface, whereby the transmissive portion 80a is not visible even if the size of the transmissive portion is increased from 100 μm to 120 μm in the foregoing embodiment. That is, the dark purple color of the solar cell is not seen. The results of the experiment for varying the width t of the transmission portion 80a are detailed in the following table.

Watch (A)

Width t mum	Observation of	Determination
			70	Can not be seen	○
80	Can not be seen	○
			90	Can not be seen	○
100	Can not be seen	○
			110	Can not be seen	○
120	Can not be seen	○
			130	Can see a little	△

When the width t is less than 120 μm, the concave portion 81 is not observed from the dial plate. When the width t is 130 μm, a little is observed. Further, by forming the transmission portion 80a as a smooth surface, light can be substantially prevented from being transmitted from above, and the transmittance is not reduced.

The structure of embodiment 9 of the present invention is explained below. As shown in fig. 25, the difference from the dial plate of embodiment 8 is that an uneven pattern 85 is formed on the upper surface of the transparent substrate 80. The other structures are the same as those in embodiment 8, and the same reference numerals are assigned to the same portions, and the description thereof is omitted.

Since the upper surface uneven pattern 85 is provided, the light reflected from the solar cell is transmitted through the lower surface transmission portion 80a, and then the light is scattered and scattered by the uneven pattern 85 and reflected. Due to the dispersion and scattering, the existence of the solar cell is more inconspicuous. Further, if the pattern on the upper surface side is different from that on the lower surface side, the reflected light from the solar cell is dispersed by the irregularities of the different pattern on the upper surface side, and therefore, the dark purple color of the solar cell is not seen at all.

Although the solar cell-equipped timepiece dial has been described above, the present invention is also applicable to a timepiece dial with a backlight in which a backlight such as electroluminescence is disposed on the lower surface side of the dial. Since the light transmitting portion is not visible at all, electroluminescence disposed thereunder is not visible at all, and the light transmitting portion can be made large. This makes it possible to obtain a larger amount of light and to brighten the illumination.

A timepiece dial according to embodiment 10 of the present invention will be described with reference to fig. 26 and 27. As shown in fig. 26, the dial 90 includes a substrate 91 on which an electrode film 93 is provided through an insulating film 92, a solar cell 94 is arranged in a stacked state, and the upper surface thereof is covered with a transparent electrode 95. The timepiece dial 90 is disposed on the transparent electrode 95 via a spacer 97.

As shown in fig. 27, the transparent substrate 100 of the timepiece dial 90 is made of a transparent polycarbonate resin, and an ultraviolet absorber is dispersed and blended. Then, a colored layer 101 impregnated with a sublimation dye is patterned on the transparent substrate 100.

The entire surface of the colored layer 101 is colored with a single color to form a colored layer, and a part of the substrate 100 includes all patterns formed with a pattern, a character, a numeral, a symbol, and the like.

The ultraviolet absorber is composed of ultrafine particulate zinc oxide, and is a material of the transparent substrate 100, that is, a material in which 1 part by weight of ultrafine particulate zinc oxide is mixed in the part by weight of the transparent polycarbonate resin 100. The ultrafine particulate zinc oxide has excellent ultraviolet absorption performance similar to that of ultrafine particulate titanium oxide, and is transparent, so that it has no influence on the color tone of the pattern and is suitable for ultraviolet protection. Further, since the ultrafine particulate zinc oxide is excellent in antibacterial action, it can provide a good hygienic effect when it is provided on the surface thereof.

In the present example, the ultrafine particulate zinc oxide was added in an amount of 1 part by weight, but when the ultrafine particulate zinc oxide was added in an amount of 0.5 to 1.5 parts by weight, a sufficient ultraviolet absorption effect was obtained. In addition, after the dial 90 for a timepiece having the above-described configuration was subjected to a light/weather fastness tester test for 200 hours in a wet state, no pattern deterioration was observed, and very good light resistance was obtained.

The upper surface of the transparent substrate 100 is polished to be a flat and smooth surface. The lower surface has a pattern-like uneven portion comprising a concave portion 100b and a convex portion 100a, and the concave portion 100b is densely integrated in a stripe shape. The bottom surface of the recess 100b is mirror-finished, and a metal reflective film 102 is formed on the inner surface of the recess 100 b. The lower surface 100c of the projection 100a is polished to expose a part of the transparent substrate 100, thereby forming a smooth light-transmitting portion. That is, the substrate structure is the same as that of embodiment 1.

The width of the lower surface 100c of the polished protrusion 100a is 120 μm or less, and the total area of the lower surface 100c of the protrusion 100a is 20 to 50% of the area of the upper surface side of the transparent substrate 100.

The metal reflective film 102 formed on the inner surface of the concave portion 100b is a metal vapor deposition film formed by a metal vapor deposition method, and is formed to have a thickness of a degree of light-impermeability. The reflective film is not particularly limited to metal, and may be a paint film formed by printing or coating to a thickness of such an extent that light cannot be transmitted. Further, after the reflection film is formed, a coating film may be further laminated as the reflection film.

In the timepiece dial 90 having the above-described configuration, the reflection film 102 is provided in the recessed portion 100b, so that light cannot pass therethrough, and instead, a reflection action occurs, whereby the color tone of the reflection film 102 is visible. The light is transmitted through the convex portion 100a and enters the solar cell disposed below the same. Further, since the lower surface 100c of the projection 100a is a smooth surface, the light is incident without being scattered, and the incidence rate can be increased.

As described above, in the present embodiment, the concave portion 100b of the lower surface of the reflective film is made to be a mirror surface, so that the reflectance of light from the reflective film can be increased, and thus, even if the width of the lower surface 100c of the convex portion 100a, i.e., the light transmission portion, is increased to 120 μm, the dark purple color of the solar cell 213 is not observed.

Even if the colored layer 101 is formed on the timepiece dial 90, the convex lower surface 100c is made smooth, so that light can be transmitted from above basically without lowering the transmittance,

as described above, according to the present embodiment, the colored layer 101 is formed of the sublimation dye, and the timepiece dial 90 having a vivid color quality can be realized.

Next, a method of manufacturing the timepiece dial 90 configured as described above will be described with reference to fig. 28a to 28 e. First, concave and convex portions are formed on a character plate blank made of a transparent plastic substrate. As shown in fig. 28a, a blank 100A of a permeable substrate 100 having a concave portion 100b and a convex portion 100A is formed on the lower surface by injection molding. The material 100A is molded by injecting a permeable resin into a mold under heat and pressure. The concave-convex portion on the lower surface is formed by copying the concave-convex portion formed on the mold, and thereby the convex surface of the mold corresponding to the bottom surface of the concave portion of the dial is processed into a mirror surface in advance. The transparent resin, which is a material used for injection molding, is made of a transparent polycarbonate resin, and zinc oxide 1 part by weight, which is ultrafine particles as an ultraviolet absorber, is added to 100 parts by weight of the polycarbonate resin.

Next, as shown in fig. 28b, metal vapor deposition is performed using a vapor deposition apparatus on the entire lower surface of the blank 100A of the transparent substrate 100, thereby forming the reflective film 102 of the metal vapor deposition mold. The metal vapor deposition mold is formed to have a thickness (about 1000 a) of a degree of light-impermeabilityAbove).

As shown in fig. 28c, the upper surface of the convex portion 100a on which the reflective film 102 is formed is polished by a polishing apparatus until the transparent substrate is exposed, and the reflective film 102 is removed and processed into a smooth convex portion lower surface 100 c.

Fig. 29 and 30 show a method of forming a colored layer 101 by impregnating the sublimation dye into the upper surface side of the permeable substrate 100 by the transfer method. As shown in fig. 29, the transparent substrate 100 is placed on the placement stage 103. Next, a transfer sheet 105 printed with a sublimation dye ink and having a color pattern 104 formed thereon was placed on the transparent substrate 100, and heated to 180 ℃ and pressed by a pressing plate 106 at a temperature of about 10g/cm²The sublimation dye in the transfer paper 105 is vaporized by the pressure of (1) for about 1 minute, and the color layer 101 shown in fig. 30 is transferred to the permeable substrate 100, thereby forming the pattern shown in fig. 28 d. Through the above manufacturing process, the dial 90 for a timepiece having sufficient light resistance and having the bright and vivid colored layer 101 can be obtained.

As a method for forming the colored layer 101 on the upper surface side of the transparent substrate 100, a method for transferring a sublimation dye on transfer paper has been described, and in addition to this, a dipping method may be adopted in which: the permeable substrate 100 is colored by immersing the permeable substrate 100 in a dye solution containing a sublimation dye in a heated state. However, the pattern obtained by this dipping method is limited to one color over the entire surface.

Fig. 31 shows a timepiece dial according to embodiment 11 of the present invention.

The timepiece dial 110 of the present embodiment is different from the 10 th embodiment in that the 2 nd unevenness 112 is provided on the upper surface side of the transparent substrate 111. The reflective film 113 is formed of a paint film. Then, a sublimation dye is impregnated into the entire surface of the substrate 111 by an immersion method, thereby coloring the substrate. Otherwise, the same reference numerals are given to the same parts as in embodiment 10, and the description thereof will be omitted.

The reflective film 113 formed in the concave portion 100b is formed of a paint film and has a thickness of a degree of light-impermeability. The 2 nd irregularity 112 provided on the upper surface side of the transparent substrate 111 is formed with a wrinkle pattern having fine irregularities, as in the 3 rd embodiment shown in fig. 8. However, a pattern different from the concave-convex pattern formed by the concave portion 100b and the convex portion 100a provided on the lower surface side of the transparent substrate 111 may be selected. When the 2 nd unevenness 112 is provided on the upper surface side of the transparent substrate 111 in this way, the light at this position is refracted and then emitted in various directions, and it is difficult to see the deep purple color of the solar cell, and the 2 nd pattern is seen, so that the decorativeness is increased. Particularly, when the 2 nd unevenness 112 has a fine pattern, dark purple is not observed at all.

As described above, in the present embodiment, the visible dial can be obtained by applying the pattern of the 2 nd unevenness 112 formed on the upper surface of the transparent substrate 111 to the color tone of the reflective film 113 of the lower surface concave portion 100b of the transparent substrate 111 in combination with the color tone of the pattern formed on the transparent substrate 111.

Next, a method for manufacturing the dial 110 having the above-described structure will be described with reference to fig. 32a to 32 d. Fig. 32a shows a blank 111A of a permeable substrate 111 formed by injection molding. The concave portions 100b and the convex portions 100a on the lower surface and the concave-convex portions 112 on the upper surface are formed by mold transfer. The transparent resin, which is a material for injection molding, is made of a transparent polycarbonate resin, and zinc oxide 1 part by weight, which is ultrafine particles of an ultraviolet absorber, is added to 100 parts by weight of the polycarbonate resin.

Next, fig. 32b shows a colored state in which the sublimation dye is impregnated into the permeable substrate 111 by an immersion method. The coloring method comprises immersing a sublimable dye solution heated to about 110 deg.C for about 1 min, washing and drying, heating at about 180 deg.C, and pressurizing to about 10-20 g/cm²The upper surface side of the transparent substrate 111 is pressed by the pressure of (2) to be colored.

In the state of being immersed in the sublimation dye solution, the depth of immersion of the dye into the permeable substrate 111 is small, and in the subsequent step, the depth of immersion of the dye is increased by heating and pressurizing, whereby the color tone of the coloring can be greatly increased.

The sublimation dye solution is a solution containing sublimation dye by utilizing plasticity having affinity for dye, and in the present embodiment, a solution containing sublimation dye in an amount of about 4 parts by weight in 100 parts by weight of polyester resin is used. The solution is immersed in a heated state and then colored, and the immersion time may be appropriately set in consideration of the temperature for heating the solution, the concentration of the coloring, and the like, but a range of approximately 1 to 3 minutes is sufficient. Even if the immersion is carried out for 3 minutes or more, the coloring concentration is not substantially changed. The coloring concentration can be arbitrarily adjusted by adjusting the dipping time, and the method is convenient.

The heating temperature of the dye solution is varied depending on the adhesive used, but when the polyester resin of the present embodiment is used, the polyester resin is set to be in the range of approximately 100 to 120 ℃, the polyester resin can be colored with the above-mentioned immersion time. If the temperature is low, the coloring time is increased, and the higher the temperature is, the faster the coloring is.

In this way, the dye can be impregnated more deeply when the permeable substrate 111 is colored, washed and dried, and then pressurized under a condition of being heated to a temperature near the softening point of the adhesive forming the permeable substrate 111. When the applied pressure is too large, the permeable substrate 111 is compressed and deformed. About 10 to 20g/cm²The pressures before and after are sufficient.

Next, as shown in fig. 32c, a reflective film 113 made of a paint film is formed on the entire lower surface of any one of the concave-convex portions 100b and 100a of the blank 111A of the transparent substrate 111.

As shown in fig. 32d, a part of the corrugation of the convex portion 100a is cut by grinding or cutting to expose the blank 111A, thereby forming a smooth lower surface 100c on the convex portion 100 a. By coloring in the above-described manufacturing process, the dye penetrates deeply into the transparent substrate 111, and at the same time, coloring with a remarkably improved light resistance against ultraviolet rays can be performed. Further, after the dial 110 for a timepiece having the above-described configuration was subjected to a 100-hour light-weather-color-fastness test in a wet state, no pattern deterioration was observed, and very excellent light resistance was obtained.

The method for manufacturing a timepiece dial according to the above embodiment is simple and can be manufactured at low cost because the number of manufacturing processes is small. In particular, the method of coloring the blank 111A of the transparent substrate 111 by dipping can sufficiently color the blank by dipping for several minutes, and thus can reduce the manufacturing cost.

In examples 10 and 11, the same effects can be obtained with an ultraviolet absorber using titanium oxide fine particles, except that ultrafine zinc oxide particles are used as the ultraviolet absorber. Further, an organic compound suitable for high temperature processing, that is, a chemical formula is blended with the polycarbonate resin 100 weight part as the material of the transparent substrate 111

The same effect can be obtained even when the composition of the ultraviolet absorber is 2.5 parts by weight. In both of examples 10 and 11, only a single ultraviolet absorber is used, but these ultraviolet absorbers may be mixed and used, and the same effects are obtained.

Next, a timepiece dial according to embodiment 12 of the invention will be described with reference to fig. 33.

As shown in fig. 33, the timepiece dial 120 differs from the 10 th embodiment in the following points. That is, the transparent substrate 121 has the transparent protective film 122 containing the ultraviolet absorber on the upper surface side, instead of containing the ultraviolet absorber in a dispersed manner. Otherwise, the same reference numerals are given to the same parts as in embodiment 10, and the description thereof will be omitted.

The transparent protective film 122 has a structure in which a chemical formula is dispersed and blended in a weight portion of the transparent polyurethane resin 100

2.5 parts by weight of a coating of 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole UV absorber was applied to a thickness of approximately 20 μm.

The transparent protective film 122 is provided to protect the colored layer 101, and is formed by a method such as printing or coating using a paint such as a transparent urethane resin or acryl resin. The upper surface of the transparent protective film 122 is polished and processed into a glossy and smooth surface.

After the dial 120 for a timepiece having the above-described structure was subjected to a 100-hour light-weather fastness test in a wet state, it was found that the dial 120 for a timepiece was excellent in light resistance without any change in the pattern.

The thickness of the transparent protective film 122 of the present embodiment is approximately 20 μm, and if it is too thin, the light resistance is affected, so the thickness is preferably at least 10 μm. Conversely, if the thickness is too large, the color tone of the ultraviolet absorber becomes too dense, and the color tone of the pattern is significantly changed after the pattern is toned. Accordingly, the thickness of the transparent protective film 122 is preferably set to be approximately 10 to 30 μm.

Next, a method of manufacturing the timepiece dial 120 configured as described above will be described with reference to fig. 34a to 34 e. First, concave and convex portions are formed on a character plate blank made of a transparent plastic substrate. Fig. 34a shows a blank 121A of a transparent substrate 121 having a concave portion 100b and a convex portion 100a on the lower surface thereof formed by injection molding. The blank 121A is not blended with an ultraviolet absorber. The other steps are the same as those of the embodiment 10.

Next, as shown in fig. 34b, a reflection film 102 formed of a metal vapor deposition mold is formed on the entire lower surface of the concave-convex portion.

As shown in fig. 34c, the lower surface of the lower surface 1 of the convex portion 100a is polished, and then the reflective film 102 is removed, thereby processing the lower surface 100c into a smooth convex portion.

As shown in fig. 34d, the sublimation dye is impregnated into the upper surface side of the transmissive substrate 121 by a transfer method to form the colored layer 101.

As shown in fig. 34e, a transparent protective film 122 is formed on the transparent substrate 121 by the above-described method, and the upper surface of the transparent protective film 122 is polished to a smooth surface.

In addition, although the present embodiment has been described with respect to the example in which the ultraviolet absorber is not dispersed and blended on the transparent substrate 121, similar effects can be obtained by dispersing and blending zinc oxide as ultrafine particles of the ultraviolet absorber in the transparent substrate 100 as in embodiment 10, as shown in fig. 35.

Next, a timepiece dial according to embodiment 13 of the invention will be described with reference to fig. 36.

The timepiece dial of the present embodiment differs from the 10 th embodiment in the following points. That is, the ultraviolet absorber is not mixed in the transparent substrate 130. The transparent substrate 130 has an accommodating layer 132 in which an ultraviolet absorber is dispersed and blended on the upper surface thereof, and a transfer pattern 131 is formed. The other points are the same as those of embodiment 10.

The containing layer 132 is formed by using a chemical formula in which a transparent polyurethane resin 100 is dispersed and blended in a weight portion

2.5 parts by weight of a coating of 2- (3, 5-yl-t-butyl-2-hydroxyphenyl) benzotriazole as an ultraviolet absorber was applied to a thickness of approximately 20 μm, and the surface was polished to form a smooth surface.

The ultraviolet absorber is in the form of powder and light yellow, and the amount of the ultraviolet absorber is determined depending on the light resistance and the color tone of the receiving layer. If the amount is small, the light resistance is poor, whereas if it is too large, the light resistance is good, but the accommodating layer 132 is colored, and the color tone appears on the transferred pattern, and the original pattern color tone does not appear. The results of the various experiments are preferably in the range of approximately 0.5 to 10 weight percent.

The adhesive of the storage layer 132 is a two-liquid polyurethane resin, but is not limited to this, and a resin such as a polyester resin, an epoxy resin, or an acryl resin may be selected.

The thickness of the containment layer 132 is important because it affects the depth of saturation of the sublimation dye. If the thickness is too small, the dye flows out due to temperature change, etc., and the pattern is discolored. From the experimental results, the thickness of the accommodating layer 132 is preferably 10 μm or more. The thickness is not particularly limited, and when the thickness is large, the depth of penetration of the dye can be increased, and the dye can be prevented from flowing out as the depth is increased. However, there is a problem that the printing cost is increased. It is sufficient that the thickness has 80 μm. Further, if the surface of the receiving layer 132 is polished to have a glossy smooth surface, since the entire surface is transferred under the same pressure, the transfer pattern is not uneven in color tone, and a beautiful transfer pattern can be obtained.

As described above, example 12 selects the ultraviolet absorber composed of 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole, and example 13 selects the ultraviolet absorber composed of 2- (3, 5-yl-t-butyl-2-hydroxyphenyl) benzotriazole. Although a single ultraviolet absorber is used, these 2 ultraviolet absorbers may be used in combination to obtain the same effect. In examples 12 and 13, the ultraviolet absorbers of the formula (1) may be used singly or in combination, and the same effects can be obtained.

Next, a method for manufacturing the dial plate having the above-described structure will be described with reference to fig. 37a to 37 c. The steps in fig. 37a to 37c are the same as those in fig. 34a to 34c, and therefore, the description thereof will be omitted.

Next, as shown in fig. 37d, an accommodating layer 132 is formed on the transparent substrate 130 by printing or painting, and the upper surface of the accommodating layer 132 is processed into a smooth surface by polishing. Formation of the storage layer 132 was made into a paint by dispersing 2.5 parts by weight of the ultraviolet absorber in the storage layer and forming the paint to a thickness of approximately 20 μm by the above-described method.

As shown in fig. 37e, the sublimation dye is impregnated into the receiving layer 132 by a transfer method to form a colored pattern 131. The colored pattern forming step comprises heating the transfer paper having a printed pattern formed thereon with a sublimation dye ink at 180 deg.C and 10g/cm²The pattern under pressure is replicated to form a replicated pattern. This step is also the same as in embodiment 10, and therefore, the description thereof is omitted.

As shown in fig. 38, the watch dial of the present embodiment has a transparent protective film 133 formed on the upper surface thereof, and the watch dial also has the same effect.

The following describes embodiment 14.

The timepiece dial 138 shown in fig. 39 includes a metallic reflective film 141 formed on an uneven portion under the transparent substrate 140, and a storage layer 142 formed in gold tone as a transfer pattern on the upper surface of the transparent substrate 140. The metal reflective film 141 is a deposited film of silver.

The receiving layer 142 is formed on the upper surface of the transparent substrate 140 by printing or the like using a paint in which an ultraviolet absorber is dispersed. This ultraviolet absorber is also the same as the containing layer 132 of embodiment 13, and therefore, the description thereof is omitted. The storage layer 142 is impregnated with a sublimation dye by a transfer method described later, and is processed into an extremely thin gold color by the following setting.

That is, printing is performed on a transfer sheet by an inkjet printer using a sublimation dye ink. This printing was performed by printing two-color sublimation dye inks of red and yellow on white transfer paper using dots having a size of approximately 1440dpi, and in this case, the yellow and red dots were uniformly dispersed without overlapping by setting such that the printing area of the yellow dot was approximately 8%, the printing area of the red dot was approximately 2%, and the printing area of the remaining white background was approximately 90%.

Next, the transfer paper is set on the smooth surface of the receiving layer 142, and the heating and pressing conditions are varied depending on the resin forming the receiving layer 142In contrast, when a polyurethane resin is used, for example, the heating temperature is about 180 ℃ and the pressing force is 10g/cm²Heating and pressing were performed for approximately 40 seconds. Thereby, the sublimation dye of the transfer paper is vaporized and is dyed into the receiving layer 142, and a desired gold tone is transferred onto the receiving layer 142.

Since the gold tone formed in this way is transferred while being pressed, there is a case where dyes of dots of different colors adjacent to each other are not sufficiently mixed, and it is necessary to maintain the dot shape after transfer. Further, since the mesh of each dot is very large when the dot is impregnated, the transferred dot may be regarded as a spot in some cases. For example, when a small number of red printed dots are arranged among a large number of yellow printed dots to display a thin orange color, the red copied dots appear to be divided into red spots in a sub-portion, although visually inconspicuous, when slightly enlarged. This is substantially inconspicuous in the case of thick orange. This is a phenomenon caused by printing using an inkjet printer. This phenomenon does not change much even if the heating temperature and the pressurizing force are adjusted, and cannot be eliminated.

In order to eliminate the above-mentioned spots, a method of reheating the containing layer may be employed, but in this reheating step, heating is required to be performed so that convection of the dye is formed in the containing layer in order to sufficiently mix the spot-like dye in a short time. When the storage layer is heated at a high temperature, the vaporized dye may leak from the storage layer. In addition, color unevenness may occur due to dye in a transparent protective film such as a blank coat provided on the receiving layer. In the present embodiment, reheating is not employed but the above-described spots are prevented from occurring by using a transparent film sheet. The replication using this film sheet is explained below.

Fig. 40 and 41 show a state where a color pattern is formed by transfer using a transparent film sheet, fig. 40 is a sectional view showing a state before transfer, and fig. 41 is a sectional view showing a state after transfer.

As shown in fig. 40, the timepiece dial 138 is placed on a placement table 143. Here, dots are printed on the transfer paper 144 at the above-described predetermined ratio. The transparent film sheet 145 is sandwiched between the receiving layer 142 formed on the upper surface of the transparent substrate 140 of the timepiece dial 138 and the transfer paper 144. The film sheet 145 is made of a resin such as polypropylene resin, polyethylene resin, polycarbonate resin, nitrocellulose resin, nitromethyltestosterone (ニトロフロン) resin, or acryl resin, and has a glossy and smooth surface. The resin forming the film sheet 145 is not limited to the above-mentioned resin, and any other resin may be selected as long as it has high heat resistance. In addition, it is not suitable to use a resin having water resistance such as a fluorine-based resin. The thickness of the transparent film 145 is set to be in the range of 25 to 50 μm.

After the film sheet 145 and the transfer paper 144 are superposed on the timepiece dial 138 in this way, the transfer is performed by pressing with the pressing tool 146 while heating. The heating temperature and the pressure were set at about 180 ℃ and 10g/cm as described above²The degree is suitable. However, it is preferable to set the pressurizing time to be longer. For example, when the pressing time is set to 90 seconds, it is preferably slightly longer, and it should be set to 100 to 110 seconds.

With this replication method, dots 147 formed of the sublimation dye on the side of the replication paper 144 are impregnated in the thin film sheet 145 and further impregnated in the receiving layer 142. This makes it possible to transfer the dye from the transfer paper 144 to the film sheet 145 and then to the receiving layer 142, thereby achieving good mixing of the dye, preventing the occurrence of dot-like spots, and obtaining an extremely beautiful gold tone.

With this replication method, the thickness of the thin film sheet 145 greatly affects the quality of the gold tone. Therefore, as a result of various tests, it was found that the thickness of the thin film sheet 145 is preferably set to 25 to 50 μm. When the thickness is less than 25 μm, the uneven pattern of the transfer paper 144 reaches the receiving layer 142 and transfers to the receiving layer 142, and when the thickness is more than 50 μm, the dye remains in the thin film sheet 145, resulting in a problem that the gold tone formed in the receiving layer 142 is not sharp enough. Therefore, it is preferable to set the thickness of the thin film piece 145 within the above range.

Further, by polishing the upper surface of the receiving layer 142 and then processing the polished upper surface into a smooth surface, transfer can be performed with a constant applied pressure, and unevenness in transfer tone does not occur. Further, since the smooth surface of the containing layer 142 is in contact with the film sheet 145, the smooth surface of the containing layer 142 can be maintained even after pressurization. Can be processed into an aesthetic surface.

The setting for obtaining a thin gold color tone is explained below. In this case, printing was also performed on transfer paper using sublimation dye ink with dots having a size of approximately 1440dpi by an ink jet printer. In this case, the yellow dots are uniformly dispersed without overlapping the red dots by setting the printing area of the yellow dots to about 30%, the printing area of the red dots to about 5%, and the printing area of the remaining white background to about 65%. Further, as in the case of the color tone described above, by transferring the transfer sheet from the transfer sheet to the receiving layer through the film sheet by heating and pressing, not only can the occurrence of spots be prevented, but also a gold color tone of a thin gold color can be obtained which is very beautiful.

The setting for obtaining a thin purple bronze color tone will be described below. In this case, printing was also performed on transfer paper using sublimation dye ink with dots having a size of approximately 1440dpi by an ink jet printer. In this case, the yellow dots were uniformly dispersed without overlapping the red dots by setting the printing area of the yellow dots to about 39%, the printing area of the red dots to about 7%, and the printing area of the remaining white background to about 54%. Further, as in the case of the color tone described above, by transferring the transfer sheet from the transfer sheet to the receiving layer through the film sheet by heating and pressing, not only can the occurrence of spots be prevented, but also a highly beautiful gold color tone of thin bronze color can be obtained.

The setting for obtaining the color tone of the purple bronze color will be described below. In this case, printing was also performed on transfer paper using sublimation dye ink with dots having a size of approximately 1440dpi by an ink jet printer. In this case, the yellow dots are uniformly dispersed without overlapping the red dots by setting the printing area of the yellow dots to about 49%, the printing area of the red dots to about 12%, and the printing area of the remaining white background to about 39%. Further, as in the case of the color tone described above, by transferring the transfer sheet from the transfer sheet to the receiving layer through the film sheet by heating and pressing, not only can the occurrence of spots be prevented, but also a highly beautiful bronze color tone can be obtained.

As described above, in order to adjust the extremely thin gold, thin red copper and red copper colors, the ratio of the total area of the yellow dot prints to the total area of the red dot prints should be set to about 4 to 6: 1, and the sum of the total area of the yellow dot prints and the total area of the red dot prints should be set to about 10 to 61% per unit area of the transfer paper. The color of gold changed from extremely thin gold to purple copper, but the red color was not mixed at a high ratio, and the amount of dye permeated, that is, the total area of yellow and red colors was increased to increase the red color feeling. When the color is changed from the extremely thin golden color to the purple copper color, the color matching proportion is adjusted, rather than the adjustment by the increase and decrease of the permeation amount.

On the transfer paper of the above example, the sublimation dye inks of two colors of yellow and red were used and printed in a uniformly dispersed state so that dots of the respective colors do not overlap each other, and when the transfer paper was transferred through the film sheet, the dots were mixed and turned into a mixed color. Alternatively, for example, a method of mixing yellow and red two-color sublimation dye inks in a predetermined amount and dot printing on a white transfer paper with an ink jet printer using an orange sublimation dye ink may be used.

In this modification, various conditions relating to heating and pressing at the time of transfer to the accommodating layer, the thickness of the film sheet, and the like are also set as in the above-described 14 th embodiment. In this case, the use of the film sheet also makes the dots well mixed, and a uniform and beautiful color tone can be obtained.

In addition to the light resistance obtained by forming the housing layer 142 by using a coating material in which an ultraviolet absorber is dispersed in a polyurethane resin, as in the above 10 th to 14 th embodiments, the light resistance may be obtained by printing or coating a blank coating material in which an ultraviolet absorber is dispersed on the upper surface of the housing layer 142 and providing a transparent protective film 148 as shown in fig. 42. In this case, the top surface of the blank coating is polished to form a glossy smooth surface, whereby a timepiece dial having excellent light resistance can be formed.

As described above, when the sublimation dye ink is transferred from the transfer sheet 144 to the receiving layer 142, the transfer method using the film sheet may be a method of transferring the sublimation dye ink to the receiving layer using the film sheet to which the sublimation dye ink has been transferred in advance, as well as a method of passing the sublimation dye ink through the film sheet 145. Next, a method of transferring a transfer film sheet on which sublimation dye ink has been previously transferred will be described.

As shown in fig. 43, the transfer film sheet 150 having the sublimation dye ink transferred thereto in advance is soaked in a transparent film sheet 151 in a vaporized state under heating and pressure, so that a color tone portion 152 toned with the sublimation dye ink is formed. As shown in fig. 44, the transfer film sheet 150 is formed by placing a transparent film sheet 151 on a placing table 143, placing a transfer sheet 144 on which dots 149 are printed with sublimation dye ink, and pressing the transfer sheet 144 with a pressing tool 146. The sublimation dye ink is transferred from the transfer sheet 144 to the transparent film sheet 151 in the same manner as in the above-described embodiment, by heating the film sheet 151 to a temperature near the softening point of the resin component and then pressing the transfer sheet 144 at a constant pressure. At this time, the sublimation dye ink printed on the transfer sheet 144 vaporizes and permeates into the film sheet 151, thereby forming the color tone portion 152. The heating and pressing are necessary to deeply penetrate the sublimation dye into the film sheet 151, and the intermolecular bonding of the film sheet 151 is weakened to facilitate the permeation of the sublimation dye vaporized in the intermolecular gap. After the transfer as described above is performed, once the film sheet 151 is returned to normal temperature, the transfer film sheet 150 in which the color tone portions 152 are formed from the sublimation dye is completed as shown in fig. 43. Thus, the transfer film sheet 150 returned to the normal temperature returns to a firm state due to intermolecular bonding, and thus the sublimation dye after the color tone portions 152 are formed does not easily flow out.

The material and thickness of the transfer film sheet 150 are the same as those of the film sheet 145 of the previous embodiment. The copy paper 144 is also similar to the embodiment described above.

Next, a method of transferring the sublimation dye ink on the receiving layer using the transfer film sheet 150 will be described with reference to fig. 45 and 46. Fig. 45 is a sectional view showing a state before copying, and fig. 46 is a sectional view showing a state after copying. As shown in fig. 45, the timepiece dial 138 is first placed on the placement base 143. In the timepiece dial 138, the accommodation layer 142 is formed on the upper surface of the transparent substrate 140, as in the previous embodiments. The upper surface of the receiving layer 142 is also ground to be a smooth surface.

The transfer film sheet 150 is superposed on the timepiece dial 138, and the transfer film sheet 150 and the timepiece dial 138 are pressed by the pressing tool 146 while being heated at a constant temperature. The conditions for transferring the heating temperature, the pressurizing force, and the like at this time were set as in the above-described examples.

In this transfer method, the vaporized sublimation dye forming the color tone part 152 of the transfer film sheet 150 permeates into the storage layer 142, and enters the storage layer 142 in the same color tone as the color tone part 152 formed in the transfer film sheet 150. In this case, as in the above-described examples, the sublimation dye was sufficiently mixed, and no spot-like unevenness occurred.

In this way, if the transfer film sheet 150 impregnated with the sublimation dye ink is prepared in advance, the gold tone can be transferred to the gold tone timepiece dial as needed. In particular, the transfer film sheet 150 does not cause the sublimation dye ink to evaporate and leak over a long period of time, unlike transfer paper, and can be stored for a long period of time. Further, by mixing an ultraviolet absorber or the like into the film sheet 151 in advance, the sublimation dye ink can be prevented from being deteriorated by ultraviolet rays.

In addition, in embodiment 14, the case where the storage layer is provided on the transparent substrate is explained, and as shown in fig. 47, a timepiece dial in which a gold color is transferred to the transparent substrate 140 containing the ultraviolet absorber to form a pattern 155 can be used, and the same effect can be obtained. As shown in fig. 48, a transparent protective film 156 containing an ultraviolet absorber is provided on the upper surface of the pattern 155, whereby the same effect can be obtained on the timepiece dial.

Industrial applicability of the invention

The present invention provides a portable timepiece dial which is excellent in light resistance and can maintain a clear pattern for a long period of time without visually observing the dark purple color of a solar cell.

Claims (16)

1. A dial for a timepiece, comprising:

a transparent substrate (11) having an upper surface on the dial surface side and a lower surface on the solar cell side,

A continuous concave-convex portion (11b, 11a) formed on the lower side surface,

a non-permeable film (12) is formed on the inner surface of each of the recesses (11b), the projecting surface of the projection (11a) is exposed to form a permeable surface (11a1),

the ratio of the total area of the transmission surfaces (11a1) to the area of the upper surface of the substrate (11) is 20% to 50%.

2. The timepiece dial according to claim 1, wherein the non-transmissive film has light reflectivity.

3. The dial for a timepiece as claimed in claim 1, wherein the concave-convex portion forms a predetermined pattern.

4. The dial for a timepiece as claimed in claim 1, wherein the base plate is colored.

5. The dial for a timepiece as claimed in claim 1, wherein the projecting surface of the convex portion is a smooth surface.

6. The dial for a timepiece as claimed in claim 1, wherein the concave-convex portion is formed in a wave shape having a trapezoidal cross section.

7. The dial for a timepiece according to claim 1, further comprising a colored transparent film formed on a non-transparent film lower surface side of the recess.

8. The dial for a timepiece according to claim 1, wherein a concavo-convex pattern (51d) is formed on an upper side surface of the base plate.

9. The dial for a timepiece according to claim 1, wherein the concave portion forms a hemispherical concave surface (67a) for incident light.

10. The dial for a timepiece as claimed in claim 1, wherein the non-permeable film is a metal mold.

11. The dial for a timepiece as claimed in claim 1, wherein the non-permeable film is a paint film.

12. The dial for a timepiece as claimed in claim 1, wherein the concave portion and the convex portion are arranged at a constant interval.

13. The dial for a timepiece as claimed in claim 1, wherein an ultraviolet absorber is blended on the transparent substrate.

14. The dial for a timepiece as claimed in claim 1, wherein the upper surface of the transparent substrate is a smooth surface.

15. The dial for a timepiece according to claim 1, wherein a transparent substrate (67) is formed on the concave-convex portion of the lower side surface.

16. The dial for a timepiece according to claim 9, wherein a plurality of lens bodies (73) are formed on the upper surface of the base plate at a portion facing the hemispherical concave surface (67 a).