JP2005189020A - Dial plate for watch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance visibility of time character on a dial plate of a watch with a solar cell. <P>SOLUTION: The dial plate 30 for the watch provided on the solar cell is formed such that in the region where the time characters 34 are provided on the transparent substrate 31 of the dial plate, the nonpermeable film layer 33 are provided. On the nonpermeable film layer 33 at the prescribed position, the time characters 34 having a complementary relational color or nearly complementary relational color with the color of nonpermeable film layer 33 are provided. Between the time characters 34 and the nonpermeable layer 33, the nonreflective film layer 35 etc., are provided. Because the color of the nonpermeable film layer 33 and the color of the time characters 34 are in complementary relation or in nearly complementary relation, the time characters 34 are clearly visible. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a timepiece dial, and to a timepiece dial with a solar cell.

  The solar cell timepiece dial transmits the received light and causes a solar cell (solar cell) disposed on the lower surface thereof to generate a power generation function. Since a timepiece dial with a solar cell is required to transmit light, a plastic material has been conventionally used in many cases. In addition to providing light transmission properties, the plastic material has advantages such as low cost and easy decoration such as painting and printing.

  Generally, as shown in the plan view of FIG. 5, a solar cell used in a portable watch is provided on four surfaces (A1, A2, A3, A4) divided into four equal parts and arranged on the lower surface of the dial. Established. Then, the transmitted light that has passed through the dial is incident on each of the four surfaces (A1, A2, A3, A4) in a uniform amount, and the power generation efficiency is most enhanced. Therefore, the dial arranged on the upper surface side of the solar cell is a portion corresponding to the four surfaces (A1, A2, A3, A4) of the solar cell, that is, the 12-6 hour line and the 9-3 hour line. It is necessary to design the four equally divided surfaces so as to transmit a uniform amount of light respectively.

  With the recent progress of science and technology, the solar cell having a very high photoelectric conversion efficiency has appeared, and a solar cell capable of driving a portable watch sufficiently even with a transmittance of 15% or 20% has appeared. In addition, it has become possible to reduce the size of the solar cell, and a solar cell that can be driven sufficiently even with a size of 10 mm square has appeared.

  However, this solar cell has a unique dark purple color. Moreover, the dividing line of the cross of the solar cell is very conspicuous due to the difference in material. For this reason, it does not give a good aesthetic appearance. In order to soften the color of the dark purple and the crosshair or to make it invisible, various attempts have been made to the dial. As one of the techniques, there is a technique disclosed in Patent Document 1 below.

JP-A-9-243759

  FIG. 6 shows a partially enlarged cross-sectional view of the display panel structure for a watch with solar cell according to one embodiment shown in Patent Document 1. According to this, B is a display plate, and the display plate B is integrally provided on the upper surface of the solar cell 11.

  The display board B here is composed of a display board substrate 12, a phosphorescent phosphor layer 13, and a surface protective coating layer 14, and a time character 15 is provided thereon. The display board substrate 12 is made of a transparent resin plate such as acrylic resin or polycarbonate resin, and the phosphorescent phosphor layer 13 is an afterglow type that functions as a light diffusing agent and a color imparting / light diffusing agent to a binder made of a transparent resin. It consists of a coating film mixed with phosphorescent phosphor. As the light diffusing agent, silicic acid powder, calcium carbonate powder, calcium phosphate powder and the like are used, and those having a particle diameter of 5 to 15 μm are kneaded in the range of 3 to 18% by weight with respect to the phosphor phosphor powder. Has been. The phosphorescent phosphor has long persistence, and 100 parts by weight is blended with 35 to 65 parts by weight of the binder. The surface protective coating layer 14 is formed to prevent deterioration of the phosphorescent phosphor, and is formed by a method such as printing using a resin such as a transparent acrylic resin, urethane resin, or epoxy resin. The time character 15 is provided by attaching an adhesive formed by printing or electroforming.

  As an effect of taking the above configuration, the reflected light from the solar cell is absorbed by the phosphorescent phosphor with the light diffusing agent and the afterglow type phosphorescent phosphor functioning as a coloring imparting / light diffusing agent, Since it diffuses and disperses with a diffusing agent, the dark purple color of the solar cell is erased and the color of the solar cell is not visually recognized. Moreover, it is supposed that the viewer can visually recognize the color tone (white color tone) of the phosphorescent phosphor.

  However, the color tone of the time character provided above the scattered light and the emitted light of the phosphorescent phosphor is very limited. Under the above configuration, the color tone (white color tone) of the phosphorescent phosphor is supposed to be visually recognized. Therefore, if a time character representing black is provided, the contrast becomes relatively high, so the visibility of the time character is also relatively Although it is improved, the visibility of white time characters, silver metal color time characters, or gold metal color time characters is poor, and the high-class feeling of precious metals is not sufficiently transmitted to the viewer.

  The present invention has been made in view of the above-described problems, and an object thereof is to improve the visibility of time characters.

  Means for achieving the above object is a timepiece dial disposed on the upper surface side of the solar cell, wherein the timepiece dial is disposed on a surface of a region portion where a time character of a transparent dial plate substrate is disposed. It has a non-permeable membrane layer, and a part of the upper surface of the non-permeable membrane layer has a time character having a color that is complementary or close to a complementary color relationship with the color of the non-permeable membrane layer.

  Alternatively, in the timepiece dial disposed on the upper surface side of the solar cell, the timepiece dial is formed on a surface portion on the opposite side of the surface portion of the area portion where the time letters of the transparent dial substrate are disposed. It has a non-permeable membrane layer, and has a time character having a color that is complementary or close to a complementary color relationship with the color of the non-permeable membrane layer on a part of the opposite surface facing the non-permeable membrane layer. is there.

  Further, as a complementary color relationship color between the non-permeable film layer and the time character, the non-permeable film layer is finished in black, and the time character is finished in white or white metal color or gold metal color. is there. Black and white are achromatic and opposite colors. In the present invention, black and white are handled as complementary colors.

  Alternatively, as a complementary color relationship color between the non-permeable film layer and the time character, the non-permeable film layer is finished in white or yellow, and the time character is finished in black.

  In addition, a non-reflective film layer of a non-transmissive film layer is provided between the upper character side of the non-transmissive film layer and the time character.

  According to the first and second aspects of the present invention, a non-permeable film layer is provided in a region where a time character of the dial is provided, and a time character having a color complementary to the color of the non-permeable film layer is provided on a part of the non-permeable film layer. If provided, the color contrast between the non-permeable membrane layer and the time character becomes very high, and the time character can be clearly recognized. Colors such as black, white, and precious metal colors such as gold and silver are often used for watch dials. Therefore, as described in claim 3, the non-permeable film layer is made black, the time character is white, silver or other white metal color, or a gold metal color that is close to the non-permeable film layer in a complementary color relationship For example, the visibility of time characters can be significantly improved. At the same time, the feeling of precious metal appears well and gives a sense of luxury. Alternatively, as described in claim 4, when the non-permeable membrane layer is tailored to white or yellow and the time character is tailored to a black character, the black time character is more prominently visible. Further, as described in claim 5, by providing a non-reflective film layer on the upper surface of the non-transmissive film layer, the strong reflected light of the non-transmissive film layer disappears, and the matte state is further enhanced and the time characters are further enhanced. It will be. In addition, a soft feeling appears throughout the dial.

  The area where the time character is provided does not take much area in the entire dial. Moreover, the time letters are provided at equal intervals along the outer peripheral area of the dial. Therefore, if a non-permeable membrane layer is provided in the region where the time characters are arranged, the non-permeable membrane layer is provided in the outer peripheral region of the dial, and the area of the dial is not much from the area of the entire dial. Does not take up area. Further, when the dial is divided into 1/4 at the 3-9 o'clock line and the 6-12 o'clock line, the non-permeable membrane layer is provided with an average area on each of the four surfaces. Therefore, the solar cell disposed on the lower surface side of the dial plate does not receive light in the portion where the non-transmissive film layer is present, but since the area is small, the required power generation amount is not impaired. In addition, since the light hits each of the four divided quarters on average, the photoelectric conversion efficiency of the solar cell is not extremely deteriorated. When a small solar cell or the like is used, the influence of the non-permeable membrane layer is further reduced because the solar cell is disposed from the outer peripheral area of the dial and is disposed from the center of the dial. Come.

  Hereinafter, the dial of the present invention will be described with reference to FIGS. FIG. 1 shows a plan view and a sectional view of a timepiece dial according to a first embodiment of the present invention. FIG. 1 (a) is a plan view, and FIG. 1 (b) is a DD sectional view in FIG. Show. FIG. 2 shows a plan view and a sectional view of a timepiece dial according to a second embodiment of the present invention. FIG. 2 (a) is a plan view, and FIG. 2 (b) is an EE section in FIG. The figure is shown. FIG. 3 shows a plan view and a sectional view of a timepiece dial according to a third embodiment of the present invention. FIG. 3 (a) is a plan view, and FIG. 3 (b) is an FF section in FIG. The figure is shown. FIG. 4 shows a plan view and a cross-sectional view of a timepiece dial according to a fourth embodiment of the present invention, wherein (a) is a plan view, and (b) is a GG cross-section in (a). The figure is shown.

  As shown in FIG. 1, the timepiece dial 20 according to the first embodiment of the present invention is provided with a non-permeable membrane layer 23 in the form of a ring on the upper surface of the transparent dial substrate 21 where the time letters 24 are provided. In this case, a part of the upper surface of the non-permeable membrane layer 23 is provided with a time character 24 at a predetermined location. In addition, the light diffusion film layer 22 is provided in the portion where the non-permeable film layer 23 is not provided on the upper surface. Although not shown, a small solar cell of 10 mm square is disposed on the lower surface side of the dial plate 20. Here, the transparent dial substrate 21 has a small hole 21a for attaching a pointer at the center thereof, and is formed of a transparent plastic material or the like. In the present embodiment, polycarbonate resin is used and formed by injection molding. The non-permeable membrane layer 23 is provided in a region where the time character 24 is provided in the outer peripheral region of the upper surface of the dial substrate 21. In the present embodiment, the entire outer peripheral region is selected as the region for forming the non-permeable membrane layer, and is formed in a ring shape with a width slightly longer than the length of the time character 24. The non-transmissive film layer 23 is formed with a thickness that hardly transmits light by a known printing method using a resin ink containing a black pigment. In this embodiment, the time character 24 is a printing method using a resin ink containing a white pigment in order to improve visibility, and with a thickness that hardly transmits light to a predetermined portion of the upper surface of the non-transmissive film layer 23. It is formed with. The light diffusion film layer 22 is provided for diffusing the reflected light from the solar cell and erasing the dark purple color of the solar cell, and the specifications of the light diffusion film layer 22 are considered in consideration of the transmittance required for the solar cell to be used. Is determined. In the present embodiment, since a small solar cell that almost fits in the formation region of the light diffusion layer 22 is used, printing is performed with the same specifications using the diffusing agent described in the background art. . The dark purple color of the solar cell is erased and is not visible.

  In the present embodiment, the non-permeable film layer 23 formed with a black color tone and the time character 24 formed with a white color tone are achromatic but opposite colors. Yes. The contrast between black and white is very high. For this reason, white time characters are clearly visible. The black non-transmissive film layer 23 and the time character 24 are formed to have a thickness of 30 to 40 μm so that the light transmittance is almost zero. The non-permeable film layer 23 is formed to have a thickness at which the transmittance is almost zero in order to avoid color mixing with the solar cell color. Further, when the time character 24 is formed by printing or the like, the light transmittance of the time character 24 is formed so as to be almost zero in order to avoid color mixing with the non-permeable film layer 23. If the transmittance is large, the color of the solar cell, the color of the non-transmissive film layer 23, the color of the time character 24, and the like occur, and a complete complementary color relationship cannot be obtained between the non-permeable film layer 23 and the time character 24. If the transmittance is within 10% at the maximum, the complementary color relationship becomes prominent and the contrast becomes very high. Further, even for colors close to complementary colors, the contrast is increased to improve visibility. For example, even if the time character is tailored to a white silver metal color or a yellow gold metal color, the color tone is clearly visible.

  Next, what is shown in FIG. 2 shows a timepiece dial according to a second embodiment of the present invention. This timepiece dial 30 is provided with a non-transmissive film layer 33 and a non-reflective film layer 35 laminated on the upper surface and outer peripheral area of a transparent dial plate substrate 31. A structure in which a time character 34 is provided at a predetermined position on the layer 35 is adopted. Although not shown, a solar cell having the same size as the dial 30 is provided on the lower surface side of the dial 30.

  Here, the dial substrate 31 is formed by mixing 13 to 18% by weight of a silicon oxide powder having a powder particle size of 3 μm or less and a white pigment of 0.4% by weight or less into a transparent polycarbonate resin and pelletizing it. The transmittance is nearly 70%. The non-transmissive film layer 33 is formed in a black color tone with the same specifications as in the first embodiment, and the light transmittance is almost zero. The non-reflective film layer 35 is provided in order to scatter the reflected light of the non-transmissive film layer 33 and make it matt. It is printed and formed to a thickness of 10 to 20 μm using an ink in which 13 to 18% by weight of a silicon oxide powder having a particle diameter of 5 to 10 μm is blended with a resin such as a transparent urethane resin, acrylic resin, or epoxy resin. Since silicon oxide powder is vitreous, light transmission / scattering occurs well, and the blending amount is as large as 13 to 18% by weight, so that light is scattered well. Further, since the film thickness is relatively thin, the black color tone of the lower non-permeable film layer 33 is visually recognized. The time character 34 is formed by bonding an electrode made of gold-glossy material with gold plating on the surface of electroformed molding or press-molding a plate (the surface is mirror-finished with a diamond tool). Yes.

  The time character 34 in the dial plate 30 having the above-described structure disappears the strong reflected light of the black non-transmissive film layer 33 by the non-reflective film layer 35, and the time character with gold metal gloss is visually recognized on the matte black. . The time character constructed in this way has a metallic luster due to the fact that both sides have a color tone close to complementary colors, and that the metallic character has a glossy matte area around the metallic character. A certain time letter is very glossy and clearly visible. And it comes to feel a precious metal-like luxury.

  The area of the non-permeable membrane layer 33 in this embodiment is about 40 to 50% of the entire area of the dial 30 because it is provided over the entire circumference of the dial substrate 31. Yes. For this reason, the lighting area of the dial 30 is only about 50 to 60%. However, if the dial substrate 31 having a transmittance of about 70% is used, a plate having a transmittance of about 35-40% can be obtained. By using a solar cell having a sufficient power generation function with a transmittance of 35% or less, a satisfactory power generation amount can be obtained.

  The dial plate substrate 31 of the present embodiment is formed by blending 13 to 18% by weight of a diffusing agent of silicon oxide powder having a powder particle size of 3 μm or less and a white pigment of 0.4% by weight or less into a transparent polycarbonate resin. And formed by injection molding. By reducing the particle size of the powder particles of the diffusing agent to 3 μm or less and increasing the blending amount to 13 to 18% by weight, the light scattering action becomes remarkable and the color of the solar cell is erased and becomes invisible. . Furthermore, whitening is further increased by slightly mixing the white pigment, and white as a dial becomes conspicuous. Moreover, a transmittance of nearly 70% can be obtained. Furthermore, the white color of the dial substrate 31, the matte black born from the non-transmissive film layer 33 and the non-reflective film layer 35, and the glossy gold metal color of the character, each of which produces high contrast and the entire dial is clear. Come to look like. Further, strong reflected light disappears from the entire dial plate, so that the dial plate feels soft.

  Next, FIG. 3 shows a timepiece dial according to a third embodiment of the present invention. The timepiece dial 40 is different from the timepiece dial 20 of the first embodiment described above only in that a non-permeable film layer is provided on the lower surface side of the dial substrate. That is, a non-permeable film layer 43 is provided in a ring shape on the lower surface of the transparent dial substrate 41 on the surface opposite to the area where the upper-side time letters 44 are provided. A time character 44 is provided at a predetermined position on the upper surface of the plate substrate 41. In addition, the light diffusion film layer 42 is provided on the upper surface side of the dial substrate 41 where the non-permeable film layer 43 is not provided. In this embodiment, a small solar cell is used, and the light diffusion film layer 42 is formed with exactly the same specifications as the light diffusion film layer of the first embodiment described above. The non-permeable film layer 43 is also formed in black with exactly the same specifications as the non-permeable film layer of the first embodiment described above. The time character 44 is formed by sticking a metal time character of white color tone with rhodium plating on the surface. The time character 44 is made by the same means as in the second embodiment.

  The dial plate 40 having the above configuration also brings about the same effect as that of the first embodiment. That is, the rhodium white color tone and the black color of the non-permeable membrane layer are in a relationship close to each other, so that the time characters are clearly visible.

  Next, a timepiece dial according to a fourth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 4, the timepiece dial 50 includes a non-permeable membrane layer 53 provided in a circle in the drawing only in a region where the dial plate 51 and the time character 54 are formed, and a time character provided on the non-permeable membrane layer 53. 54. Although not shown, a solar cell having the same size as the dial plate 50 is disposed on the lower surface side of the dial plate 50. Here, the dial substrate 51 is formed by an injection molding method by mixing a light diffusing agent and a pigment with a transparent resin such as an acrylic resin or a polycarbonate resin, and pelletizing it. Therefore, a slight coloring is applied, and light transmission, diffusion and reflection functions work. As the light diffusing agent, silicic acid powder, calcium carbonate powder, calcium phosphate powder, or the like is used, and 0.5 to 10% by weight of a particle having a particle size in the range of 5 to 15 μm is blended. The pigment is used for imparting coloration and is blended in an amount of 0.5 to 10% by weight. The non-transmissive film layer 53 is provided in a small area only around each time character 54. In this embodiment, the non-transmissive film layer 53 is formed by printing with an ink containing a white pigment, and is formed to a thickness at which the light transmittance is almost zero. Yes. Further, the time character 54 is formed by printing with an ink containing a black pigment at a predetermined position on the upper surface of the non-transmissive film layer 53, and has a thickness at which the light transmittance is almost zero.

  The black time character 54 of the dial plate 50 having such a configuration has a complementary color relationship between black and white due to the white non-permeable film layer 53 on the lower surface thereof, and can be seen very clearly. . In addition, since a diffusing agent, pigment, or the like is dispersed on the dial substrate 51, a sufficient amount of transmitted light can be obtained for power generation of the solar cell, and the color of the solar cell is erased, and the dial plate having another color tone. Will be visible.

  In the above configuration, the non-reflective film layer described in the second embodiment can be provided between the time letter 54 and the non-transmissive film layer 53. The strong reflected light from the white non-transmissive film layer 53 disappears, and the black time character becomes more noticeable.

  In the present embodiment, the time character 54 and the non-permeable film layer 53 are both formed by printing, but are not particularly limited to printing. The non-permeable membrane layer 53 may be formed of an aluminum thin plate or foil, and the black time letter 54 may be formed thereon by printing or the like. Or you may affix the metal time letter which gave black plating. In both cases, the time characters can be clearly seen if both have a complementary color relationship or a color tone close to the complementary color.

  As described above in detail, the timepiece dial with solar cell is provided with a non-permeable membrane layer, and a time character is provided at a predetermined position thereon, and the non-permeable membrane. If the color tone of the layer and the time character is finished with a complementary color relationship or a color tone close to the complementary color relationship, the visibility of the time character is dramatically improved as compared with the prior art. In the present embodiment, the non-permeable membrane layer and the time character have been described as white and black, but the color is not particularly limited. Red and green colors, and blue and yellow colors are also complementary or close to complementary colors, so when these colors are used, the time letters are clearly visible. Further, when a non-transmissive film layer is formed using these colors and the above-described non-reflective film layer or the like is provided on the non-transmissive film layer, the time character becomes more conspicuous. At the same time, the color tone of the entire dial will be softened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view and a sectional view of a timepiece dial according to a first embodiment of the present invention, in which (a) is a plan view and (b) is a DD sectional view in FIG. FIG. 6 is a plan view and a cross-sectional view of a timepiece dial according to a second embodiment of the present invention, where FIG. (A) is a plan view, and (b) is an EE cross-sectional view in FIG. FIG. 4 is a plan view and a cross-sectional view of a timepiece dial according to a third embodiment of the present invention, in which FIG. (A) is a plan view, and (b) is a FF cross-sectional view in FIG. FIG. 6 is a plan view and a cross-sectional view of a timepiece dial according to a fourth embodiment of the present invention, where (a) is a plan view, and (b) is a GG cross-sectional view in (a). It is a top view of a solar cell. It is the elements on larger scale of the display board structure for timepieces with a solar cell shown by patent document 1. FIG.

Explanation of symbols

20, 30, 40, 50 Clock dial 21, 31, 41, 51 Dial substrate 22, 42 Light diffusion film layer 23, 33, 43, 53 Non-transparent film layer 24, 34, 44, 54 Time 35 Reflective film layer

Claims (5)

In the timepiece dial disposed on the upper surface side of the solar cell, the timepiece dial has a non-permeable film layer in a region portion where the time character on the upper surface side of the transmissive dial substrate is disposed, A timepiece dial having a time character having a complementary color relationship or a color close to a complementary color relationship with a color of the non-permeable film layer on a part of an upper surface of the non-permeable film layer. In the timepiece dial disposed on the upper surface side of the solar cell, the timepiece dial is on the lower surface side of the transparent dial plate substrate and the lower surface corresponding to the opposite side of the region portion on which the upper surface time characters are disposed. For a timepiece having a non-permeable membrane layer at a portion thereof, and a portion of the upper upper surface side of the non-permeable membrane layer having a time character having a complementary color relationship or a color close to a complementary color relationship with the color of the non-permeable membrane layer Dial. 3. The timepiece dial according to claim 1, wherein the non-permeable film layer has a black color, and the time character has a white or white metal color or a gold color. 4. The timepiece dial according to claim 1, wherein the non-permeable membrane layer is white or yellow, and the time character is black. 5. The timepiece dial according to claim 1, further comprising a non-reflective film layer between the non-transmissive film layer and a time character on the upper surface side. 6.

Images