JP2018136338A - Watch with solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a watch with a solar cell that has reduced visibility of a boundary between a region including the solar cell and a region not including it.SOLUTION: A watch with a solar cell 1 includes a clockface 14 and a solar cell 30 arranged on part of the backside of the clockface 14. The clockface 14 has a rugged pattern 70 on its surface, and part of the rugged pattern 70 is along a boundary between a region including the solar cell 30 and a region not including it viewed from above.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a timepiece with a solar cell.

  In a watch with a solar cell in which a solar cell is arranged on the back side of the dial, the appearance color may be different between the region where the solar cell is present and the region where the solar cell is not present, which may impair the appearance.

  Patent Document 1 below describes a solar cell timepiece in which a shielding sheet that is opaque at least in a region where a solar cell is not disposed is provided on the front side or the back side of the solar cell.

JP 2012-2111895 A

  In the timepiece with a solar battery described in Patent Document 1, by arranging a shielding sheet, it appears as if cells are also present in the cutout portion of the solar battery. With this technique, the color difference between the region where the solar cell is present and the region where the solar cell is not present is substantially eliminated. However, there is an individual difference in the color of the solar cell, and it is difficult to precisely match the color of the solar cell and the shielding sheet, and there is a concern that the boundary between the region where the solar cell exists and the region where the solar cell does not exist can still be visually recognized. Is done.

  Therefore, an object of the present invention is to provide a timepiece with a solar cell in which visibility of a boundary between a region where a solar cell exists and a region where the solar cell does not exist is reduced.

  The invention disclosed in the present application in order to solve the above problems has various aspects, and the outline of typical ones of these aspects is as follows.

  (1) A dial plate and a solar cell disposed on a part of the back side of the dial plate, the dial plate having a concavo-convex pattern on a surface thereof, and a part of the concavo-convex pattern in plan view And a solar cell timepiece along a boundary between a region where the solar cell is present and a region where the solar cell is not present.

  (2) In (1), a sheet disposed between the dial plate and the solar cell, a region provided between the dial plate and the sheet, and a region where the solar cell exists and a region where the solar cell does not exist A watch with a solar cell, further comprising a colored matte surface or matte layer covering the surface.

  (3) A watch with a solar cell in (2), wherein the color of the matte surface or the matte layer is blacker than the color of the solar cell.

  (4) In any one of (1) to (3), it further includes a shielding member that covers at least a region where the solar cell is not disposed, and the color of the shielding member is darker than the color of the light receiving surface of the solar cell. Watch with solar battery.

  (5) In any one of (1) to (4), the sun further includes a decorative member having a pattern or shape along a line extending a boundary between the region where the solar cell is present and the region where the solar cell is not present in plan view Clock with battery.

  (6) In any one of (1) to (5), the region where the solar cell does not exist is a solar cell timepiece having a shape in which the 2 o'clock direction is cut out in a fan shape from the 10 o'clock direction.

  (7) In (1), the dial is provided with a colored layer on a back surface, and is provided between the dial and the solar cell, and between the dial and the sheet. A watch with a solar cell, comprising: a matte surface or a matte layer covering a region where the solar cell is present and a region where the solar cell is not present.

  (8) In (1), a colored sheet disposed between the dial plate and the solar cell, a region provided between the dial plate and the sheet, and a region where the solar cell is present do not exist. A watch with a solar cell, further comprising a matte surface or a matte layer covering the region.

  According to the present invention, a timepiece with a solar cell in which the visibility of the boundary between the region where the solar cell exists and the region where the solar cell does not exist is reduced can be obtained.

It is a top view which shows the satellite radio-controlled wristwatch concerning the embodiment of the present invention. It is a top view which shows a solar cell. It is a top view which shows a shielding member. It is a fragmentary sectional view of a satellite radio-controlled wristwatch. It is a fragmentary sectional view of the satellite radio-controlled wristwatch concerning the 1st modification. It is a fragmentary sectional view of the satellite radio-controlled wristwatch concerning the 2nd modification. It is a fragmentary sectional view of the satellite radio-controlled wristwatch concerning the 3rd modification. It is a fragmentary sectional view of the satellite radio-controlled wristwatch concerning the 4th modification. It is a fragmentary sectional view of the satellite radio-controlled wristwatch concerning the 5th modification. It is a top view which shows the satellite radio-controlled wristwatch concerning a 6th modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing a satellite radio-controlled wristwatch 1 according to an embodiment of the present invention. The figure shows a case 10 which is the exterior (watch case) of a satellite radio-controlled wristwatch, a dial 14 arranged in the case 10, and an hour hand 15, minute hand 16 and second hand 17 which are hands indicating time. Further, a crown 13 and buttons 12 for a user to perform various operations are arranged on the side surface of the trunk 10 on the 3 o'clock side. A band fixing portion 11 for fixing the band extends from the side surface of the trunk 10 at the 12 o'clock side and the 6 o'clock side.

  In addition, the design of the satellite radio-controlled wristwatch 1 shown in the figure is an example. In addition to those shown here, for example, the barrel 10 may be a square shape instead of a round shape, and the presence / absence, number, and arrangement of the crown 13 and the button 12 are arbitrary. In the present embodiment, the hands are three hands of the hour hand 15, the minute hand 16, and the second hand 17. However, the present invention is not limited to this, and the second hand 17 may be omitted, or the day of the week, the time zone or the presence / absence of summer time, the radio wave The reception status, remaining battery level, pointers for various displays, date display, and the like may be added.

  In this specification, the term satellite radio wave wristwatch refers to a wristwatch that receives a satellite signal from a satellite that transmits information about the date and time, such as a GPS satellite, and the date included in the satellite signal. It is used to indicate a wristwatch having a function of correcting the internal time, which is information on the time held in the wristwatch, based on information related to the time, that is, reference information. However, the present invention is not limited to a satellite radio wave wristwatch, but may be applied to a radio wave wristwatch that receives a general standard radio wave and corrects the internal time, or may be applied to a wristwatch that does not have such a time correction function. . Furthermore, it may be applied not only to a wristwatch but also to a table clock or a wall clock.

  In the satellite radio-controlled wristwatch 1, a windshield made of a transparent material such as glass is attached to the trunk 10 so as to cover the dial 14. A back cover is attached to the body 10 on the opposite side of the windshield. In the present specification, hereinafter, the direction in which the windshield of the satellite radio-controlled wristwatch 1 is disposed (front side in FIG. 1) is referred to as the front side, and the direction in which the back cover is disposed (back direction in FIG. 1) is referred to as the back side.

  A solar cell 30 is disposed on the back side of the dial 2 and power is generated by light incident from the front side. Therefore, the dial 14 is formed of a material that transmits light to some extent. Although details will be described later, as shown in FIG. 2, the solar cell 30 has a substantially circular shape and is cut out in a fan shape from the 10 o'clock direction to the 2 o'clock direction. On the back side of the dial 14, a patch antenna 20 for receiving a satellite signal is disposed in the cut-out portion (a region where the solar cell 30 does not exist). Although details will be described later, as shown in FIG. 4, the front surface of the patch antenna 20 is a receiving surface 20a for receiving radio waves from a satellite. The receiving surface 20a of the patch antenna 20, the light receiving surface of the solar cell 30, and the dial plate 14 are provided in parallel to each other, and all face the front side.

  By the way, in general, in a radio timepiece that performs time adjustment using a standard radio wave transmitted from a ground station using a long wave band, a so-called bar antenna in which a coil is wound around a magnetic core such as a ferrite or an amorphous alloy is used. Many. In contrast, the satellite radio-controlled wristwatch 1 according to the present embodiment receives a signal transmitted from a satellite using a UHF band having a much higher frequency. For this reason, the patch antenna 20 is used as a small antenna suitable for receiving a UHF band signal. And since a satellite signal is a high frequency, if the electrode of the solar cell 30 is arrange | positioned at the front side of the patch antenna 20, the receiving sensitivity will fall remarkably. Therefore, a notch is formed in a part of the solar cell 30 as described above, and the patch antenna 20 is disposed there so that the electrode of the solar cell 30 is not disposed above the receiving surface 20a, that is, on the front side. Yes. In place of the patch antenna 20, a chip antenna or an inverted F antenna may be employed.

  In addition, in the body 10 of the satellite radio-controlled wristwatch 1, a mechanism (movement) for driving the hands, a storage battery for storing the power generated by the solar cell 30, a controller for controlling the operation of the satellite radio-controlled wristwatch 1, A receiving circuit for processing the received satellite signal is accommodated.

  The dial 14 is wider than the opening on the front side of the cylinder 10, and the cylinder 10 covers the periphery. For this reason, the dial 14 is such that only the region (exposed region) inside the contour line (parting line) X of the opening of the trunk 10 is visible from the outside through the windshield, and is outside the contour line X. This region (non-exposed region) is hidden by the barrel 10 and cannot be seen from the outside.

  FIG. 2 is a plan view showing the solar cell 30 housed inside the trunk 10 of the satellite radio-controlled wristwatch 1. FIG. 3 is a plan view showing the shielding member 40 accommodated in the trunk 10 of the satellite radio-controlled wristwatch 1. Further, FIG. 4 is a partial cross-sectional view of the satellite radio-controlled wristwatch 1 centering on a region where the solar cell 30 and the patch antenna 20 are adjacent to each other.

  As shown in FIG. 2, the solar cell 30 includes a substrate 30b having a shape in which the 2 o'clock direction is cut out in a fan shape from the 10 o'clock direction. In the example shown in FIG. 2, the angle formed by the notch 30c is 120 °. As described above, the patch antenna 20 is disposed in the inner region of the cutout portion 30c (the region where the solar cell 30 does not exist, referred to as a non-arrangement region) so that the reception surface 20a faces the windshield side. As long as the angle which the notch part 30c makes is an angle which the patch antenna 20 can accommodate, what kind of thing may be sufficient as it. However, as will be described later, it is preferable that the pattern provided on the dial 14 or the decorative member disposed on the dial 14 and the side of the notch 30c overlap in plan view. In addition, the area | region where the solar cell 30 exists is called a non-arrangement area | region, whereas the area | region where the solar cell 30 exists is called an arrangement | positioning area | region.

  A plurality of engaging portions (concave and convex shapes) are provided on the periphery of the substrate 30b at positions separated from each other, and these engaging portions are solar 10 which is a frame body (not shown) accommodated in the body 10 itself or inside the body 10. It is engaged with the cell support frame. Thereby, the board | substrate 30b is supported in the satellite radio-controlled wristwatch 1 so that rotation is impossible. These engaging portions are formed outside the contour line X so that they cannot be seen through from the front side of the dial 14. Further, an opening for inserting the pointer shaft is formed at the center of the solar cell 30, and a plurality of cells 30a, which are power generation units including a semiconductor thin film and electrodes, are formed on the surface.

  The shielding member 40 is disposed on the back side of the solar cell 30 and shields the cutout portion 30 c of the solar cell 30. The color of the shielding member 40 may be the color of the material (for example, resin) itself, or the surface of the colored member may be colored. This coloring may be a coating film made of an arbitrary opaque paint, or may be a semiconductor layer obtained by removing the conductive layer functioning as an electrode from the layer constituting the cell 30a of the solar battery 30, and further laminating the both. You may do it. When coloring is used as a coating film, the production of the shielding member 40 is inexpensive and easy, whereas when coloring is used as a semiconductor layer, there is an advantage that the coloring and the color and texture of the cell 30a can be easily matched. A coating film may be further added to the coloring of the semiconductor layer for fine adjustment. The reason for removing the conductive layer when coloring is a semiconductor layer is to prevent the patch antenna 20 from affecting the reception of radio waves from the satellite. Further, when coloring is used as a semiconductor layer, a PIN layer (a PIN diode layer of a type in which an I layer which is a genuine semiconductor layer is interposed between a P layer and an N layer) used as a semiconductor layer of the cell 30a is used. Although it may be used as a semiconductor layer, instead of this, only the I layer, the P layer, or the N layer may be used as the semiconductor layer. This is because the shielding member 40 only needs to approximate the color and texture of the cell 30a and does not need a function as the solar cell 30.

  Since it is difficult to make the color of the shielding member 40 the same as the color of the light receiving surface of the solar cell 30, it is preferable that the color of the light receiving surface of the solar cell 30 is darker. Specifically, it is desirable that the color of the shielding member 40 is darker than the color of the cell 30a or the substrate 30b. When the color of the shielding member 40 is darker than the color of the light receiving surface of the solar cell 30, the cells 30a or the substrate 30b are also present in the non-arranged region as viewed from the front side of the dial plate 14 as compared with the case where the color is not so. Easy to look like. Here, when the color is dark, for example, when the Munsell color system is adopted as a method of expressing the color, it may mean that the lightness of the color is low. Since it is desirable that the boundary between the shielding member 40 and the solar cell 30 is difficult to distinguish in appearance, it is desirable that the hue and saturation of the shielding member 40 be close to the hue and saturation of the cell 30a or the substrate 30b. As another example, when the CIExyY color system is adopted as a method for expressing a color, the dark color may mean that the value of the luminous reflectance Y is small. When the CIExyY color system is employed, it is desirable that the x and y values of the shielding member 40 are close to the x and y values of the cell 30a or the substrate 30b.

  In addition, it is sufficient if the shielding member 40 is colored on the non-arrangement region in the surface of the shielding member 40. However, by coloring the entire surface of the shielding member 40, the patch antenna 20 is shielded without precisely aligning the positions of the shielding member 40 and the solar cell 30. Therefore, when coloring the whole surface of the shielding member 40, the solar cell timepiece 1 with reduced visibility of the boundary between the arrangement area and the non-arrangement area can be obtained by a simpler assembly process. Further, as another configuration of the shielding member 40, it is conceivable that the shielding member 40 is disposed on the front side of the solar cell 30 and only the region covering the non-arranged region in the sheet formed of the transparent member is colored. In this case, since it is necessary to precisely position the shielding member 40 with respect to the solar cell 30, it is not preferable.

  A plurality of engaging portions (uneven shape) are also provided at positions separated from each other at the periphery of the shielding member 40, and these engaging portions are accommodated in the body 10 itself or inside the body 10 and a solar cell support frame (not shown). Is engaged. Thereby, the shielding member 40 is also supported in the satellite radio-controlled wristwatch 1 so as not to rotate. These engaging portions are also formed outside the contour line X.

  In the present embodiment, the shielding member 40 is a single sheet, but the shielding member 40 may not be a sheet. For example, the solar cell 30 may be disposed on the solar cell support frame with the surface of the solar cell support frame, which is a frame housed in the body 10, as a coating surface. In that case, the patch antenna 20 will be arrange | positioned in the back surface side or the inside of a solar cell support frame. Even in such a case, by making the color of the surface of the solar cell support frame darker than the color of the light receiving surface of the solar cell 30, the cells 30 a or the substrate 30 b exist in the non-arranged region. Can show.

  As shown in FIG. 4, a sheet 50 is disposed between the dial 14 and the solar cell 30. A matte layer 60 is provided on the surface of the sheet 50. In order to apply external light to the light receiving surface of the solar cell 30, the sheet 50 and the matte layer 60 are formed of a material that transmits light to some extent.

  The matte layer 60 is a layer that diffuses light by having an uneven surface on the front side. Here, when the sheet 50 has a thickness, the distance between the matte layer 60 and the light receiving surface of the solar cell 30 is maintained. Then, the light that enters from the dial 14 side, is reflected by the light receiving surface of the solar cell 30 and returns to the dial plate 14 side, and the light that is reflected by the surface of the shielding member 40 and returns to the dial plate 14 side is the matte layer. At 60, it is diffused uniformly and irregularly. Therefore, when observed from the dial 14 side, the boundary between the arrangement area and the non-arrangement area becomes unclear and the so-called Mach effect is suppressed, so that the color difference between the arrangement area and the non-arrangement area is almost visually recognized. Disappear.

  On the other hand, if the matte layer 60 is formed on the back surface of the sheet 50 and the surface of the cell 30a constituting the solar cell 30 and the matte layer 60 are in contact with each other without being separated, There is a difference in the scattering state of light by the matte layer 60 between the region where 60 is in contact with the cell 30a and the region where the matte layer 60 is separated from the shielding member 40. Therefore, the light scattering state is not uniform in both areas, and the color difference between the arrangement area and the non-arrangement area becomes conspicuous. This is because, in the region where the member is in contact with the back surface side of the matte layer 60, light enters the member from the convex portion on the back surface of the matte layer 60 without passing through the space, whereas on the back surface of the matte layer 60 In the region where the member does not contact, light is emitted into the space from the entire back surface of the matte layer 60, so that there is a large difference in the light path between the two.

  The mat layer 60 may be colored as long as it is a material that transmits the amount of light necessary for power generation by the solar cell 30. When the mat layer 60 is colored and transparent, the mat layer 60 is preferably blacker than the cells 30a and the substrate 30b. Here, when the color is black, for example, when the Munsell color system is adopted as a method of expressing the color, it may mean that the color saturation is low. In addition, for example, when the CIExyY color system is adopted as a method for representing a color, the color black means that the color is closer to the color represented by the points x = 1/3 and y = 1/3. You can do it. A point where x = 1/3 and y = 1/3 generally represents an achromatic color.

  If the mat layer 60 is colored and transparent, the color difference between the arrangement area and the non-arrangement area is further reduced when viewed from the dial 14 side. That is, even when a difference in color or texture occurs between the solar cell 30 and the shielding member 40 due to individual differences of the solar cells 30, the difference between the two is more perceived by looking through the common mat layer 60. It becomes difficult. The matte layer 60 is preferably not directly coated with a paint. This is because when the paint is applied to the surface of the matte layer 60, the concave and convex portions provided on the surface of the matte layer 60 are filled with the paint, depending on the optical characteristics such as the refractive index of the paint. This is because the light diffusion effect due to the uneven surface is reduced. When a colored layer is provided by a paint on the surface side of the matte layer 60, the paint is not applied directly to the matte layer 60, but is applied to the dial 14 side as in a third modification described later. This problem is solved by forming a colored layer by coating. In the present embodiment, the mat layer 60 may be transparent and the sheet 50 may be colored and transparent.

  In the configuration in which the alignment is facilitated by arranging the shielding member 40 on the back surface side of the solar cell 30 as in the present embodiment, a difference in height occurs between the arrangement region and the non-arrangement region. Even in such a configuration, the matte layer 60 is formed on the surface of the sheet 50 and is disposed apart from the arrangement area and the non-arrangement area, so that the light diffusion effect is uniformly exhibited in these areas. Thus, the color difference between these regions can be made inconspicuous.

  FIG. 5 is a partial cross-sectional view centering on a region where the solar cell 30 and the patch antenna 20 are adjacent to each other in the satellite radio-controlled wristwatch 1 according to the first modification. In the first modification, a first matte layer 61 is provided on the back surface of the dial 14, and a second matte layer 62 is provided on the surface of the sheet 50. An uneven surface is provided on each of the back surface of the first mat layer 61 and the surface of the second mat layer 62. Thus, by making the matte layer into two layers, the light incident from the dial 14 side and reflected by the light receiving surface of the solar cell 30 is more strongly diffused, and the arrangement area and the non-arrangement area The visibility of the boundary is further reduced. In the first modification, one of the first matte layer 61 and the second matte layer 62 may be colored and transparent, or both may be colored and transparent. Moreover, it is good also as a structure which does not provide the 2nd mat layer 62 but provides only the 1st mat layer 61.

  FIG. 6 is a partial cross-sectional view centering on a region where the solar cell 30 and the patch antenna 20 are adjacent to each other in the satellite radio-controlled wristwatch 1 according to the second modification. The first matte layer 61 in the second modification is formed by laminating a first colored layer 61a and a first matte layer 61b on the back surface of the dial 14 in this order. The second matte layer 62 is formed by laminating a second colored layer 62a and a second matte layer 62b on the surface of the sheet 50 in this order. Here, the first matting layer 61b and the second matting layer 62b are provided to face each other, and are arranged so that the uneven surfaces face each other. That is, the back surface of the first mat layer 61b and the surface of the second mat layer 62b are uneven surfaces. The first colored layer 61a and the second colored layer 62a are colored transparent layers, and may be a coating film having a thickness and a color enough to transmit light. Further, the first matte layer 61b and the second matte layer 62b may be transparent. In the case of the second modification, the transmittance of the first matting layer 61 and the second matting layer 62 can be adjusted by adjusting the thickness and color of the first colored layer 61a and the second colored layer 62a. . Therefore, there is an advantage that a desired transmittance can be obtained without precisely adjusting the thickness of the first matting layer 61b and the second matting layer 62b. One of the first matte layer 61 and the second matte layer 62 only needs to be provided.

  If the first matte layer 61b and the first colored layer 61a are directly formed on the surface of the second matte layer 62b, the concave / convex concave portions provided on the surface of the second matte layer 62b are formed in the first matte layer. The concave portion of the uneven surface provided in the surface of the first matting layer 61b is filled with the first colored layer 61a, thereby reducing the light diffusion effect of these matting layers; Become. On the other hand, as shown in FIG. 6, these layers are formed on the front surface of the sheet 50 and the back surface of the dial plate 14 so as to face each other, so that the surface of each matte layer maintains unevenness, and light diffusion. The effect is not reduced. Then, by forming the first mat layer 61 b on the back surface of the dial plate 14, a glossy uneven surface pattern as shown in FIG. 10 can be formed on the surface of the dial plate 10.

  FIG. 7 is a partial cross-sectional view mainly showing a region where the solar cell 30 and the patch antenna 20 are adjacent to each other in the satellite radio-controlled wristwatch 1 according to the third modification. In the third modification, a colored layer 63 is provided on the back surface of the dial 14, and a transparent matte layer 64 is provided on the surface of the sheet 50. The colored layer 63 is a colored transparent layer, and may be a coating film having a thickness and a color enough to transmit light. In the third modification, the transmittance of light incident from the dial 14 side can be adjusted by the thickness and color of the colored layer 63. Therefore, the color of the light receiving surface of the solar cell 30 and the brightness of the color of the shielding member 40 that are visually recognized on the dial 14 side can be adjusted by the thickness and color of the colored layer 63. Further, the transparent matte layer 64 can uniformly and irregularly diffuse light incident from the dial 14 side and light reflected from the light receiving surface of the solar cell 30 and returning to the dial 14 side. Therefore, the visibility of the boundary between the arrangement area and the non-arrangement area decreases. A transparent matte layer 64 may be provided on the back surface of the dial 14 and a colored layer 63 may be provided on the surface of the sheet 50. Alternatively, the colored layer 63 may be provided on the surface of the sheet 50 and the surface of the colored layer 63 may be glossy. An erasing layer 64 may be provided.

  FIG. 8 is a partial cross-sectional view centering on an area where the solar cell 30 and the patch antenna 20 are adjacent in the satellite radio-controlled wristwatch 1 according to the fourth modification. In the fourth modification, a matte surface 65 is provided on the surface of the colored sheet 51. The matte surface 65 is constituted by a rough surface in which fine irregularities are directly formed on the surface of the colored sheet 51. Due to the thickness of the colored sheet 51, the matte surface 65 is provided apart from the light receiving surface of the solar cell 30. The matte surface 65 is a concavo-convex surface, and diffuses light incident from the dial 14 side and light reflected from the light receiving surface of the solar cell 30 and returning to the dial 14 side uniformly and irregularly. Therefore, the visibility of the boundary between the placement area and the non-placement area is reduced. The colored sheet 51 is a sheet formed of a colored transparent material, and its transmittance is lower than that of the dial 14. In the fourth modification, the transmittance of light incident from the dial 14 side can be adjusted by the thickness and color of the colored sheet 51. Therefore, the color of the light receiving surface of the solar cell 30 and the brightness of the color of the shielding member 40 that are visually recognized on the dial 14 side can be adjusted by the thickness and color of the colored sheet 51. Note that the matte surface 65 may be composed of the matte layer shown in FIG.

  FIG. 9 is a partial cross-sectional view centering on a region where the solar cell 30 and the patch antenna 20 are adjacent to each other in the satellite radio-controlled wristwatch 1 according to the fifth modification. The thickness of the dial 14 in the fifth modification is w1, and the thickness of the sheet 50 is w2. Here, w1 <w2, and the sheet 50 according to the fifth modification is thicker than the dial 14. In general, the total thickness of the parts that can be placed inside the wrist of a watch is limited by the thickness of the shell. And most of the space inside the trunk is occupied by a movement, a storage battery, a patch antenna, a receiving circuit, and the like. As a result, the total thickness of the dial 14 and the sheet 50 may be limited to about several hundred μm. Here, the light incident from the dial 14 side, reflected from the light receiving surface of the solar cell 30 and returned to the dial plate 14 side, and the light reflected from the surface of the shielding member 40 and returned to the dial plate 14 side are more strongly scattered. In order to achieve this, it is necessary to increase the distance from the uneven surface of the mat layer 60 to the light receiving surface of the solar cell 30. In the fifth example, the distance from the mat layer 60 to the light receiving surface of the solar cell 30 can be increased by making the thickness of the sheet 50 thicker than the thickness of the dial 14. Thereby, even if the total thickness (approximately w1 + w2) of the dial plate 14 and the sheet 50 is limited to a predetermined value, the visibility of the boundary between the placement area and the non-placement area is lowered.

  The mat layer 60 and the like may be formed of a layer containing fine particles that reflect or refract light. For example, a layer containing spherical transparent fine particles can be used as the matte layer 60. Even in that case, the light incident from the dial 14 side is scattered uniformly and irregularly by the matte layer 60 and the like, reflected by the light receiving surface of the solar cell 30 and returned to the dial 14 side, and The light reflected from the surface of the shielding member 40 and returning to the dial 14 side is also scattered uniformly and irregularly by the matte layer 60 or the like. Regardless of the configuration of the mat layer 60 or the like, if the incident light is scattered uniformly and irregularly, the visibility of the boundary between the arrangement region and the non-arrangement region is lowered.

  FIG. 10 is a plan view showing a satellite radio-controlled wristwatch 1 according to a sixth modification. The surface of the dial 14 according to the sixth modified example is provided with a concavo-convex pattern 70 that spreads radially around the rotation axis of the pointer. A part of the concavo-convex pattern 70 is formed along a boundary between a region where the solar cell 30 exists and a region where the solar cell 30 does not exist in a plan view. In the satellite radio-controlled wristwatch 1 according to the sixth modification, a decorative member 80 is provided on the dial 14. The decorative member 80 may be directly affixed to the dial 14 or may be fixed so as to be sandwiched with the dial 14 by the trunk 10. The decorative member 80 is provided with a decorative member pattern 82 that overlaps the radiation around the rotation axis of the pointer. A part of the decorative member pattern 82 is formed along a line extending the boundary between the region where the solar cell 30 is present and the region where the solar cell 30 is not present in plan view.

  The uneven pattern 70 is formed along the boundary between the region where the solar cell 30 is present and the region where the solar cell 30 is not present in a plan view, so that it is difficult to visually recognize the difference between the color of the placement region and the color of the non-placement region. Demonstrate the optical illusion effect. In particular, in the concavo-convex pattern 70 in this example, the pattern extending in the 10 o'clock direction from the rotation axis of the pointer and the pattern extending in the 2 o'clock direction from the rotation axis of the pointer are, in plan view, an arrangement region and a non-arrangement region. Overlap the boundary. Such a pattern is the pattern that covers the boundary between the shielding member 40 and the solar cell 30 and has the largest optical illusion effect for visually recognizing a small color difference between the shielding member 40 and the solar cell 30. In addition, the interval which forms the uneven | corrugated pattern 70 may differ from the example shown in FIG. Moreover, when the notch 30c of the solar cell 30 has a shape other than a fan shape, an uneven pattern along the shape may be formed on the surface of the dial 14. Unlike the matte layer 60, the uneven pattern 70 is desirably formed on the front glossy surface of the dial 14 that easily reflects light. In that case, the light line is visually recognized in a radial manner, and an illusion effect that allows the color difference between the shielding member 40 and the solar cell 30 to be visually recognized is exhibited.

  The decorative member pattern 82 is formed so as to overlap the extension line of the boundary between the region where the solar cell 30 is present and the region where the solar cell 30 is not present in plan view, so that the color of the arrangement region and the color of the non-arrangement region Demonstrate the effect of making the difference difficult to see. In particular, among the decorative member patterns 82 in this example, the pattern formed in the 10 o'clock direction and the pattern formed in the 2 o'clock direction exhibit a large optical illusion effect. Further, when the decorative member pattern 82 is formed so as to overlap the extended line of the uneven pattern 70 formed on the surface of the dial 14, a stronger optical illusion effect is exhibited. The uneven pattern 70 and the decorative member pattern 82 are visually recognized as a single line covering the boundary between the shielding member 40 and the solar cell 30, and the color difference between the shielding member 40 and the solar cell 30 is more illusioned. It is. The decorative member pattern 82 may be formed in a three-dimensional shape. For example, a pattern may be formed by providing periodic steps in the circumferential direction of the decorative member 80.

  Further, when the decorative member 80 is not provided on the dial 14 and the solar cell 30 is located near the inner periphery of the bezel and the solar cell 30 and the bezel are close to each other, the surface of the bezel is similar to the decorative member pattern 82. A bezel may be used as a decorative member by providing a simple pattern, and the color difference between the shielding member 40 and the solar cell 30 may be made small. Furthermore, a decorative member 80 may be provided on the dial 14 and a pattern similar to the decorative member pattern 82 may be provided on the surface of the bezel. In that case, both the decorative member pattern 82 and the pattern provided on the surface of the bezel are formed so as to overlap the extended line of the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist, and the shielding member 40 and the solar cell 30. It is desirable to make the difference in color visually smaller.

  The notch 30c of the solar cell 30 according to the present embodiment has a fan shape as shown in FIG. 2, and the angle formed by the notch 30c is 120 ° as an example. In the state where the solar cell 30 is disposed inside the body 10, the sides of the notch 30c extend in the 10 o'clock direction and the 2 o'clock direction. Therefore, for example, when the satellite radio-controlled wristwatch 1 is put on a catalog or displayed at a store, the hour hand 15 and the minute hand 16 are adjusted by adjusting the pointer to the position of 10: 9: 35 as shown in FIG. Can be superimposed on the boundary between the region where the solar cell 30 exists and the region where the solar cell 30 does not exist. Therefore, in the display state, it is possible to put a pointer on the boundary between the shielding member 40 and the solar cell 30, and it is difficult to visually recognize the difference between the color of the arrangement area and the color of the non-arrangement area. Generally, a wristwatch is often placed in a catalog or displayed at a position where a clock hand shows around 10: 8 to 9 minutes. Therefore, the notch 30c is centered around the 12 o'clock position. By forming the formed angle at about 120 °, it is difficult to visually recognize the difference between the color of the placement area and the color of the non-placement area.

  1 Satellite radio watch, 10 body, 11 band fixing part, 12 buttons, 13 crown, 14 dial, 15 hour hand, 16 minute hand, 17 second hand, 20 patch antenna, 20a receiving surface, 30 solar cell, 30a cell, 30b substrate, 30c Notch, 40 Shielding member, 50 sheet, 51 Colored sheet, 60 Matte layer, 61 1st matte layer, 61a 1st color layer, 61b 1st matte layer, 62 2nd matte layer, 62a 1st matte layer 2 colored layers, 62b 2nd mat layer, 63 colored layer, 64 transparent mat layer, 65 mat surface, 70 uneven pattern, 80 decorative member, 82 decorative member pattern.

Claims (8)

Dial,
A solar cell disposed on a part of the back side of the dial,
The dial has an uneven pattern on the surface,
A part of the concavo-convex pattern is a timepiece with a solar cell along a boundary between a region where the solar cell exists and a region where the solar cell does not exist in a plan view. A sheet disposed between the dial and the solar cell;
A colored matte surface or matte layer provided between the dial and the sheet, covering a region where the solar cell is present and a region where the solar cell is not present,
The timepiece with solar cell according to claim 1, further comprising:   The timepiece with solar cell according to claim 2, wherein the color of the matte surface or the matte layer is blacker than the color of the solar cell. A shielding member covering at least a region where the solar cell is not disposed;
The timepiece with solar cell according to any one of claims 1 to 3, wherein the color of the shielding member is darker than the color of the light receiving surface of the solar cell.   With a solar cell as described in any one of Claims 1-4 which further has the decoration member which has a pattern or a shape along the line which extended the boundary of the area | region where the said solar cell exists, and the area | region which does not exist in planar view. clock.   The solar cell timepiece according to any one of claims 1 to 5, wherein the region where the solar cell does not exist has a shape in which the 2 o'clock direction is cut out in a fan shape from the 10 o'clock direction. The dial has a colored layer on the back surface,
A sheet disposed between the dial and the solar cell;
The timepiece with a solar cell according to claim 1, further comprising a matte surface or a matte layer provided between the dial and the sheet and covering a region where the solar cell is present and a region where the solar cell is not present. A colored sheet disposed between the dial and the solar cell;
The timepiece with a solar cell according to claim 1, further comprising a matte surface or a matte layer provided between the dial and the sheet and covering a region where the solar cell is present and a region where the solar cell is not present.

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