JP2007093238A - Electronic device with solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic device with solar cell, while holding latitudes for the window size, capable of assuring electric power supply capacity. <P>SOLUTION: A solar cell 15 consists of split cells A, B, C, and D quadrisected by parting lines 15DA, 15AB, 15BC, and 15CD on the domain of a power-generating plane formed on a sheet of substrate and acquires electromotive force required for loading by making those split cells in-series. An irradiated domain A16 and an irradiated domain D19 are formed on the power-generating plane of the solar cell 15 through a circular window with a comparatively small open area of the dial and have a mutually equal area W1 symmetrically striding across the parting line 15DA. An irradiated domain B and an irradiated domain C are formed through a fan-shaped window with a comparatively large open area of the dial and have a mutually equal area W2 (W1<W2) on the split cells B and C symmetrically striding across the parting line 15AB. Light transmission α2 of the fan-shaped window is set out smaller than light transmission α1 of the circular window. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device with a solar cell that converts light energy into electric energy to drive the electronic device.

  2. Description of the Related Art Conventionally, solar cells (solar cells) have been adopted in various electronic devices including analog electronic watches. In an analog electronic timepiece, a translucent dial is adopted, and a solar cell is disposed under the dial. Therefore, a plastic material having a good light transmission property or a thin plate-like ceramic is generally selected as the material of the dial. However, when a dial with good light transmission is used, the dark purple color that is the original color of the solar cell can be seen through, which has the disadvantage of deteriorating appearance quality.

  Some recent solar cells have been able to generate electromotive force necessary for driving a watch even when a dial having a low light transmittance is used. Along with this, there are some that employ a metal dial plate in which a daylighting hole is formed in order to obtain a light transmittance capable of obtaining an electromotive force necessary for driving the timepiece (see, for example, Patent Document 1). . If the dial disclosed in Patent Document 1 is used for a solar electronic timepiece, the daylighting hole is limited to a part of the dial plate surface, or a colored transparent plastic film is pasted on the dial plate rear surface. Because of this, the dark purple color of the solar cell is inconspicuous. That is, the dial can be finished with a variety of luxury.

The present applicant arranges a window member having a plurality of windows of different areas on a solar cell divided into n pieces, and the area of the irradiation region formed on each divided cell by the windows becomes equal. An application has been filed for such an electronic device with a solar cell (see Patent Document 2). As a result, the dark purple color of the solar cell becomes inconspicuous, and at the same time, the power generation efficiency can be improved by aligning the current values that can be supplied by each divided cell.
JP-A-10-123265 (paragraph 0011 and FIGS. 2 and 3) PCT / JP2005 / 007165 (unpublished)

  In order to make the dial more rich than the literature 1, the irradiation area of each divided cell is made equal by changing the size of each window portion of the dial or devising its arrangement. It is also necessary to design without being bound. As described above, if the irradiation area of each divided cell is different as a result of giving priority to designability, a portion with a large irradiation area, that is, a portion with a large exposed area of the solar cell is changed to a portion with a small exposed area of the solar cell. In comparison, the ground color and dividing line of solar cells are more noticeable. As described in Document 1, this can be solved by sticking a colored transparent plastic film to the entire dial. However, if a small area of the divided cell is covered with a colored transparent plastic film, the transmittance is reduced and the current supply capability of the divided cell is reduced. That is, the current supply capability of the circuit in which the divided cells are connected in series is reduced, and as a result, there is a case where it is not possible to secure electric power that can sufficiently drive the electronic timepiece.

The present invention has been made in order to solve such a conventional problem. The object of the present invention is to adopt a window member having a plurality of windows having different areas, and increase the degree of freedom in the design of the dial. An object of the present invention is to provide an electronic device with a solar cell capable of ensuring a sufficient current supply capability even when the area of an irradiation region formed on each divided cell of the solar cell differs depending on the window.

  The means of the present invention for achieving the above-described object is to provide a solar cell having a solar cell, a window member disposed on the solar cell, and a load driven by electric power supplied from the solar cell. In the electronic device, the solar cell includes a plurality of divided cells formed by dividing the solar cell into a plurality of regions, and the window member is irradiated with light to each of the divided cells. A window having a predetermined light transmittance is provided, and the divided cell includes at least one first divided cell which is a divided cell in which an irradiation region having a relatively small area is formed by at least one of the windows. A second divided cell, which is a divided cell in which an irradiation region having a larger area than the irradiation region of the first divided cell is formed by the two windows, and the second divided cell has a light The light transmittance of the second window portion as a window portion that is at least a part of the window for irradiating is the first as the window portion that is at least a portion of the window for irradiating the first divided cell with light. It is characterized by being set smaller than the light transmittance of the window portion.

  In addition, the first divided cell and the second divided cell are connected in series, and when the first and second window portions are irradiated with light having the same illuminance, the light of the second window portion The light transmittance of the second window portion is such that the current supply capability of the second divided cell based on the transmittance is equal to or greater than the current supply capability of the first divided cell based on the light transmittance of the first window portion. Is set.

  The second window irradiates light to a plurality of adjacent divided cells across a dividing line dividing the solar cell.

  Further, the light transmittance with respect to the opening area of the second window part is reduced by forming a light shielding part in the second window part.

  The window includes a plurality of the second window portions, and the light transmittance of all the second window portions is made smaller than the light transmittance of the first window portion.

  The plurality of second window portions may form an irradiation region having the same area in the second divided cell, and all the second window portions have the same light transmittance.

  The window portion includes a plurality of the first window portions, and the light transmittances of all the first window portions are equal.

  In addition, when one of the windows irradiates light across a plurality of divided cells to form irradiation areas having different areas in each divided cell, 1 is provided for each portion corresponding to each divided cell. The light transmittances of the two window portions are different from each other.

As described above, according to the present invention, the solar cell-equipped electronic device having the solar cell, the window member disposed on the solar cell, and the load driven by the power supplied from the solar cell. In the solar cell, a plurality of divided cells formed by dividing the solar cell into a plurality of regions are formed, and the window member is for irradiating light to the divided cells. A window having a predetermined light transmittance is provided, and the divided cell includes a first divided cell in which an irradiation region having a relatively small area is formed by at least one of the windows, and at least one of the above-described divided cells. And a second divided cell, which is a divided cell in which an irradiation region having an area larger than the irradiation region of the first divided cell is formed by a window, and the second divided cell is irradiated with light. The first window portion as a window portion, which has at least a portion of the window for irradiating the first divided cell with light transmittance of a second window portion as a window portion that is at least a portion of the window for Therefore, when setting the size of the window of the window member, the degree of freedom of design of the dial plate is increased as compared with the conventional case. Moreover, the dark purple of the solar cell in each window could be made inconspicuous. Moreover, the electronic device with a solar cell which can fully secure an electric current supply capability was able to be provided.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a wristwatch with a solar cell according to the first embodiment of the present invention, FIG. 2 is an enlarged sectional view of a main part showing a section AA in FIG. 1, and FIG. FIG. 4 is a plan view of the movement with the exterior parts removed from the wristwatch.

  First, the configuration of the first embodiment will be described with reference to FIGS. In FIG. 1, reference numeral 1 denotes a wristwatch with a chronograph function as an electronic device with a solar cell. Reference numeral 2 denotes a case which is an exterior part of the wristwatch 1. Reference numeral 6 denotes a dial as a window member which is an exterior part constituting the time display unit. A dial ring having a time scale is arranged on the peripheral portion of the dial 6. As shown in detail in FIG. 3, the dial 6 is a second plate made of a transparent plastic plate having a predetermined light transmittance α (1> α> 0) on the entire back surface of the first dial 7 made of a metal plate. A dial plate 8 is pasted and formed.

  In addition, a circular window 7a, which is a chronograph minute display portion having a predetermined opening area, is formed in the 12:00 direction of the first dial 7, and a division scale is provided around the circular window 7a. Has been. A square window 7b as a date display portion is formed in the 3 o'clock direction, and a sector window 7c, which is a chronograph hour display portion having a relatively large opening area with respect to the circular window 7a in the 6 o'clock direction. A character, a symbol, a figure, or the like is printed on the second dial plate 8 in the fan-shaped window 7c. This printed portion is a light shielding portion 8a.

  Returning to FIG. 1, 9 indicates an hour hand for displaying the time when it is an exterior part constituting the time display section, 10 indicates a minute hand for displaying the minute, and 11 indicates a second hand for displaying the second. Reference numeral 12 denotes a minute hand for displaying the minutes of the chronograph as an exterior component, 13 denotes an hour hand for displaying the time of the chronograph, and FIG. 2 shows a cross section around the hour hand 13.

  In FIG. 4, reference numeral 14 denotes a movement which is a timepiece driving unit. Reference numeral 15 denotes a solar cell that generates a photovoltaic power disposed on the lower surface side of the dial 6. The solar cell 15 has a power generation surface area formed on a single substrate made of film, glass, stainless steel, or the like, and is divided into 12 DA-6 o'clock direction dividing lines 15DA and 15BC, 9 o'clock-3 o'clock direction. It has divided cells A, B, C, D formed by dividing into four equal parts by dividing lines 15AB and 15CD, and these divided cells are connected in series to a secondary battery (not shown) and are necessary for the load. To get a good electromotive force. A through hole 15 d is formed in the solar cell 15 at a position corresponding to the central through hole 7 d of the first dial 7. A through hole 15 e is formed at a position corresponding to the through hole 8 e of the second dial 7.

  The pointer shaft 14d of the movement 14 passes through the through hole 15d of the solar cell and the through hole 7d of the dial plate 6 and protrudes from the first dial plate 6 to which the hour hand 9, the minute hand 10 and the second hand 11 are fixed. Has been. Further, the other pointer shafts 14e and 14f pass through the through holes 15e and 15f of the solar cell 15 at positions corresponding to the through holes 8e and 8f of the second dial 8, respectively. A chronograph minute hand 12 and an hour hand 13 are respectively attached to the pointer shafts 14e and 14f protruding in the direction.

Reference numeral 16 denotes an irradiation area A formed by irradiating light on the power generation surface of the divided cell A of the solar cell 15 through the circular two window 7a (hatching surrounded by a two-dot chain line that is a part of the outline of the circular window 7a). 17 is surrounded by a two-dot chain line that is a part of the outline of the fan-shaped window 7c formed on the power generation surface of the divided cell B of the solar cell 15 through the fan-shaped window 7c. 18 and 19 indicate irradiation areas C and D formed on the power generation surfaces of the divided cells C and D symmetrically across the dividing lines 15BC and 15DA in the 12 o'clock to 6 o'clock direction, respectively. ing. The areas of the irradiation region A16 and the irradiation region D19 are the same area W1, and the areas of the irradiation region B17 and the irradiation region C18 are the same area W2 (W1 <W2).

  Here, if the total light-shielding area formed in the irradiation region 17 by the light-shielding portion 8a in the fan-shaped window 7c is 2 × w, w is set so that the relationship of w = W2-W1 is established. In setting the light shielding area, when the light shielding effect due to the presence of the hour hand 13 cannot be ignored, it is taken into consideration. Due to the presence of the light-shielding portion 8a, the opening area of the fan-shaped window 7c is substantially reduced, and the light transmittance with respect to the opening area is considered to be smaller than α.

  The wristwatch 1 is configured to drive a load by electric power supplied from the solar cell 15. For such a load, for example, an oscillation circuit that outputs a high-frequency signal using a crystal resonator, an oscillation circuit thereof A frequency dividing circuit that divides an output high-frequency signal into a signal having a period of 1 second, a driving circuit that converts a signal output from the frequency dividing circuit into a driving signal for driving a step motor, and an operation button operation A drive control circuit that controls the operation of the drive circuit, a charge control circuit that performs control such as prevention of overcharge of the secondary battery and charging warning, and the like are included.

  Next, the effect of the wristwatch 1 according to the first embodiment of the present invention will be described. Since the second dial plate 8 having the light transmittance α is used for the circular window 7a having a relatively small area, the dark purple color of the solar cell 15 can be made inconspicuous. Moreover, since the light shielding part 8a is formed inside the fan-shaped window 7c having a relatively large area, the ground color and the dividing line of the solar cell 15 can be made inconspicuous. Accordingly, the size of the window of the dial 6 can be set to a certain degree of freedom and can be set to a large size, so that it is possible to provide the wristwatch 1 with good design.

  Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is a plan view of a wristwatch with a solar cell according to a second embodiment of the present invention, FIG. 6 is a plan view of a dial of this watch, and FIG. 7 is a plan view of a movement with exterior parts removed from this wristwatch. is there. First, the structure of the 2nd Embodiment of this invention is demonstrated with reference to FIGS. In FIG. 5, reference numeral 21 denotes a wristwatch with a dual time display function as an electronic device with a solar cell. Reference numeral 26 denotes a dial. Reference numeral 30 denotes a remaining charge indicator hand that is an exterior part, and reference numerals 31 and 32 denote hour and minute hands, respectively, for dual time display.

  As shown in detail in FIG. 6, the dial plate 26 is formed by attaching a second dial plate 28 formed of a plastic material having partially different light transmittances to the back surface of the first dial plate 27. . In addition, a fan-shaped window 27a, which is a remaining charge display section, is formed in the 12 o'clock direction, and the light transmittance of the second dial plate 28 including the peripheral edge of the fan-shaped window 27a is α1 (1> α1>). 0), and a remaining charge indicator scale is printed on the second dial plate 28. A circular window 27c, which is a dual time display unit, is formed in the 6 o'clock direction. The light transmittance of the second dial plate 28 including the outer peripheral edge of the circular window 27c is α2 (α1> α2). The hour scale is printed on the peripheral portion of the second dial plate 28 in this portion.

In FIG. 7, reference numeral 33 denotes a movement which is a timepiece driving unit. Reference numeral 34 denotes a solar cell disposed on the lower surface side of the dial 26. The power generation surface of the solar cell 34 is divided into four equal parts by dividing lines 34AB, 34BC, 34CD, 34DA in the same manner as that shown in FIG. 4 to form divided cells A, B, C, D. The solar cell 34 is formed with through holes 34d, 34e and 34f through which the square holes 34b and the pointer shafts 33d, 33e and 33f of the movement 33 pass. An hour hand 9, a minute hand 10 and a second hand 11 are fixed to the pointer shaft 33 d protruding above the dial plate 26. A remaining charge indicator hand 30 is fixed to the pointer shaft 33e protruding above the second dial 28, and an hour hand 31 and a minute hand 32 for dual time display are fixed to the pointer shaft 33f. .

  Reference numeral 36 denotes an irradiation region A formed by irradiating light on the power generation surface of the solar cell 34 through the fan-shaped window 27a (a hatched portion surrounded by a two-dot chain line which is an outline of the fan-shaped window 27a and the dividing line 34DA, an area W3). 37 is surrounded by an irradiation region B (a two-dot chain line that is an outline of the circular window 27c and a dividing line 34BC) formed on the power generation surface of the dividing cell B of the solar cell 34 through the circular window 27c. A hatched area W4) is shown, and 38 and 39 are irradiation regions C formed on the power generation surfaces of the divided cells C and D symmetrically to the irradiation regions A and B across the dividing lines 34BC and 34DA, respectively. And D. The area W3 <W4. The fan-shaped window 27a and the circular window 27c have light-shielding portions by respective pointers, printing scales, and the like. For convenience of explanation, it is assumed that W3 and W4 do not include the area of this light-shielding portion.

  Here, the divided cells A, B, C, and D are connected in series, and the division based on the light transmittance α2 of the circular window 27c when the fan-shaped window 27a and the circular window 27c are irradiated with light having the same illuminance. The light transmittance α2 of the circular window 27c is set so that the current supply capability of the cell B (divided cell C) is equal to or higher than the current supply capability of the divided cell A (divided cell D) based on the light transmittance α1 of the fan-shaped window 27a. A value has been set. Since other configurations are the same as those of the first embodiment, the same names and symbols are assigned to the same components, and detailed description thereof is omitted.

  Here, a method for changing the light transmittance of the second dial plate 28 to a partially smaller one will be described. As described in JP-A-2002-162480, a part of the second dial plate 28 having a light transmittance α1 as a whole is provided with a plurality of layers of coatings by printing a transparent coating. Can be made smaller than α1. If a part of the dial plate 28 having the light transmittance α1 has a sufficient current supply capability, the light transmittance can be partially lowered by the same method. Also, as described in JP-A-2005-106641, gradation can be added to the print density. Due to this gradation, the light transmittance of a portion with a high print density is small, the light transmittance of a portion with a low print density is large, and the light transmittance changes stepwise according to the gradation. As the printing means, for example, the paint can be printed by screen printing, offset printing or the like, but any printing means can be used as long as it can print a transmissive paint. Note that the lower half of one second dial plate 28 may be printed with a transmissive paint, or separate transparent plates having different light transmittances may be used for the respective window portions.

  Next, the effect of the dual time display wristwatch according to the second embodiment of the present invention will be described. Since the light transmittance α2 of the circular window 27c is set to be smaller than the light transmittance α1 of the fan-shaped window 27a, the dark purple color of the solar cell is less noticeable even in a relatively large window portion such as the circular window 27c. Moreover, even if the circular window 27c straddles the dividing line, the dividing line is hardly noticeable. Further, the current supply capability of the divided cell B (divided cell C) based on the light transmittance α2 of the circular window 27c is greater than or equal to the current supply capability of the divided cell A (divided cell D) based on the light transmittance α1 of the fan-shaped window 27a. Thus, since the value of the light transmittance α2 of the circular window 27c was set, the wristwatch 21 with sufficient current supply capability was obtained.

Embodiments of the present invention will be described below with reference to schematic diagrams. FIG. 8 is a diagram schematically showing the first and second embodiments of the present invention described above. Each has two windows P and Q, and each of the divided cells A and D, and the divided cells B and C are formed with irradiation areas A and D, B and C symmetrically divided by the dividing line DA. This is an example (1). Here, the divided cell A is a divided cell in which an irradiation region A having a relatively small area is formed, and such a divided cell is referred to as a first divided cell. On the other hand, the divided cell B is a divided cell in which an irradiation region B having a relatively large area is formed, and such a divided cell is referred to as a second divided cell. Therefore, the divided cell D having the irradiation area D having the same area as the irradiation area A is also the first divided cell, and the divided cell C having the irradiation area C having the same area as the irradiation area B is also called the second divided cell. . Moreover, the window part corresponding to the irradiation area | region A is a part of window P so that the outer periphery may be represented with a dashed-two dotted line. Thus, the window part (part of the window P) in which the irradiation area is formed in the first divided cell is called the first window part, and the window in which the irradiation area is similarly formed in the second divided cell. The part (a part of the window Q) will be referred to as a second window part.

  FIG. 9 is a schematic diagram showing a third embodiment of the present invention. This is an example (2) in which there are four windows P, Q, R, and S, each of which forms one irradiation region A, B, C, and D in each of the divided cells A, B, C, and D. It is. In this case, there is no solar cell dividing line in any of the windows. Here, when the areas are compared, it is assumed that irradiation region A <irradiation region B <irradiation region C <irradiation region D. In this case, at least the divided cell A is the first divided cell because the irradiation area is small compared to any other divided cell. Further, the divided cells B, C, and D are the second divided cells because the irradiation area is larger than that of the divided cell A. Moreover, since the window P does not straddle other divided cells and forms an irradiation region only in the first divided cell, in this case, the entire window P is the first window portion. Similarly, all of the windows Q, all of the windows R, and all of the windows S are all second window portions. Furthermore, since the area is in the relationship of irradiation region B <irradiation region C, the relationship between the first divided cell and the second divided cell is also established between the divided cells B and C. Similarly, the relationship between the first divided cell and the second divided cell is also established between the divided cell C and the divided cell D and between the divided cell B and the divided cell D. Thus, in this embodiment, there are a plurality of first and second window portions.

FIG. 10 is a schematic diagram showing a fourth embodiment of the present invention. This is an example (3) in which an irradiation region is formed in all divided cells by one window P straddling the dividing line. Here, when the areas are compared, it is assumed that irradiation region A <irradiation region B <irradiation region C <irradiation region D. In this case, the names of the first and second divided cells are the same as in Example (2). Further, all the window portions corresponding to the respective irradiation regions are part of the same window P. Therefore, as for the name of the first or second window portion, a part of the window P is called.

  FIG. 11 is a schematic diagram showing a fifth embodiment of the present invention. This is an example (4) in which a plurality of windows form an irradiation region in one divided cell. In this case, there are two irradiation areas A, one formed by the window P and the other by the window Q. Therefore, the area of the irradiation region A is the sum of the two. Here, the comparison of the areas is assumed to be irradiation region A <irradiation region B = irradiation region C = irradiation region D. Since the divided cell A becomes the first divided cell, the windows P and Q forming the irradiation area A are both called the first window portion. The divided cells B, C, and D are all second divided cells, and the windows R, S, and T are all second window portions. That is, this is also an example in which a plurality of first window portions and second window portions exist.

As described above, according to the present invention, the total area of the irradiation regions formed in the divided cells by the at least one window is equal to the total area of the irradiation regions formed in the at least one other divided cell by the at least one window. Target different things. That is, it can be said that there is at least one first divided cell or second divided cell. In such a case, the light transmittance of the second window portion as a window portion that is at least a part of the window for irradiating the light to the second divided cell is at least that of the window for irradiating the first divided cell with light. It is characterized in that it is smaller than the light transmittance of the first window as a part of the window. In addition, when one window irradiates light across a plurality of divided cells to form irradiation areas with different areas in each divided cell, for each portion of the window corresponding to each divided cell The light transmittance in one window may be different from each other. In the second embodiment of the present invention, it has been described that the transmittance of the second dial plate 28 is changed stepwise. As described above, the light in the first window portion and the second window portion is described. When the transmittance is not uniform, the average value of the transmittance in the window is defined as the transmittance of the window.

  In the present invention, even if the divided cells have different irradiation areas, the first divided cell and the second divided cell are connected in series, and the first and second window portions have the same illuminance. When the light is irradiated, the current supply capability of the second divided cell based on the light transmittance of the second window is greater than or equal to the current supply capability of the first divided cell based on the light transmittance of the first window. In addition, the light transmittance of the second window is set. In this case, it is assumed that the amount of supplied current is sufficient to drive the load of the electronic device even in the divided cell having the minimum irradiation area.

  Since the current flowing in the series circuit of the first divided cell and the second divided cell is limited by the current supply capability of the divided cell having a small current supply capability, it is assumed that light is transmitted through the first window portion and the second window portion. If the rate is equal, it becomes equal to the current supply capability of the first divided cell having a small area of the irradiation region. In the range where the current supply capability of the second divided cell based on the light transmittance of the second window portion is equal to or higher than the current supply capability of the first divided cell based on the light transmittance of the first window portion, the light of the second window portion. By setting the transmittance smaller than the transmittance of the first window portion, the current supply capability of the series circuit of the first divided cell and the second divided cell is ensured, and then the second window portion. The background color of the solar cell can be made inconspicuous.

  Although the wristwatch has been described exclusively in the above embodiments, the present invention is not limited to the wristwatch and can be widely applied to various other electronic devices driven by solar cells.

It is a top view of the wristwatch with a chronograph function which is the 1st embodiment of the present invention. It is sectional drawing which shows the AA cross section of FIG. It is a top view of the dial of the timepiece of FIG. It is a top view of the movement of the timepiece of FIG. It is a top view of the wristwatch with a chronograph function which is the 2nd Embodiment of this invention. It is a top view of the dial of the timepiece of FIG. It is a top view of the movement of the timepiece of FIG. It is the schematic diagram showing the 1st and 2nd embodiment of this invention. It is a schematic diagram which shows the 3rd Embodiment of this invention. It is a schematic diagram which shows the 4th Embodiment of this invention. It is a schematic diagram which shows the 5th Embodiment of this invention.

Explanation of symbols

1,21 Wristwatch 6,26 Dial 7a, 27c Circular window 7c, 27a Fan-shaped window 7, 27 First dial 8, 28 Second dial 8a Light shield 15, 34 Solar cell 15DA, 15AB, 15BC, 15CD , 34DA, 34AB, 34BC, 34CD
Split line α, α1, α2 Light transmittance A, B, C, D Split cell

Claims (8)

  An electronic device with a solar cell having a solar cell, a window member disposed on the solar cell, and a load driven by electric power supplied from the solar cell, the solar cell having the solar cell A plurality of divided cells formed by dividing the cell into a plurality of regions are formed, and the window member is provided with a window having a predetermined light transmittance for irradiating each divided cell with light. The divided cell is a first divided cell in which an irradiation region having a relatively small area is formed by at least one of the windows, and is larger than the irradiation region of the first divided cell by at least one of the windows. A second divided cell that is a divided cell in which an irradiation region of an area is formed, and is at least a part of the window for irradiating light to the second divided cell The light transmittance of the second window portion as the window portion is set smaller than the light transmittance of the first window portion as the window portion that is at least a part of the window for irradiating the first divided cell with light. An electronic device with a solar cell.   The first divided cell and the second divided cell are connected in series, and light having the same illuminance is irradiated to the first and second window portions, the light transmittance of the second window portion. The light transmittance of the second window portion is set so that the current supply capability of the second divided cell based on the second divided cell is equal to or greater than the current supply capability of the first divided cell based on the light transmittance of the first window portion. The electronic device with solar cell according to claim 1, wherein the electronic device has a solar cell.   The window member has a plurality of the windows, and one of the plurality of windows is irradiated with light to two divided cells adjacent to each other across a dividing line dividing the solar cell. 2. The solar cell according to claim 1, wherein the solar cell is disposed so as to constitute a second divided cell, and each portion of the one window corresponding to the two divided cells is used as the second window portion. With electronic equipment.   The solar light according to any one of claims 1 to 3, wherein the light transmittance with respect to the opening area of the second window portion is reduced by forming a light shielding portion in the second window portion. Electronic equipment with cells.   The plurality of second window portions are included in the window, and the light transmittance of all the second window portions is smaller than the light transmittance of the first window portion. The electronic device with a solar cell according to claim 1.   The plurality of the second window portions form an irradiation region of the same area in the second divided cell, and all the second window portions have the same light transmittance. Electronic device with solar cell.   The said window contains the said some 1st window part, The light transmittance of all the said 1st window parts was made equal, The any one of Claims 1-6 characterized by the above-mentioned. Electronic device with solar cell. One of the windows is disposed so as to extend over two or more divided cells, and an irradiation region having a different area is formed in at least two divided cells, whereby the two divided cells are divided into the first divided cells. The light transmittance of the portion corresponding to the first divided cell of the one window is determined from the light transmittance of the portion corresponding to the second divided cell of the one window. 2. The electronic device with solar cell according to claim 1, wherein the first window portion and the second window portion are provided in the one window by setting the first window portion to be smaller.

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