JP5238433B2 - Electronic clock with solar cell - Google Patents

Description

The present invention relates to an electronic timepiece equipped with a solar cell.

  Conventionally, many electronic watches having a solar cell and using light such as sunlight as generated power have been commercialized. Electronic watches equipped with these solar cells are generally used with a structure in which a light-transmitting dial is stacked on top of the solar cell because the solar cell absorbs light and generates power. ing.

  In such a means, since the solar cell has a deep purple color, the color and design of the dial plate are greatly restricted when trying to harmonize the appearance as a watch. More specifically, the dial needs to transmit light to some extent in order to obtain the amount of power generated by the solar cell to operate the electronic timepiece. Therefore, there is a problem that even if it is white, it becomes a grayish tone. On the other hand, if the light transmittance of the dial is lowered in order to achieve harmonious appearance, the amount of light transmitted to the solar cell is reduced, resulting in a problem of insufficient charging. In addition, a metal dial that does not transmit light cannot be used. As a conventional technique for solving this problem, there is an electronic timepiece in which ring-shaped solar cells are arranged vertically on the outer periphery of a dial (see, for example, Patent Document 1 below).

  In addition, since the output voltage of a single cell of a general solar cell is as low as about 0.6 V, it is not possible to operate an electric / electronic device or charge a secondary battery. As a conventional technique for solving this problem, a solar cell in which a single cell is serialized to increase an output voltage is generally used. Further, as a conventional technique, there is a means for increasing a voltage by providing a booster circuit (see, for example, Patent Document 2 below).

  By the way, an electronic clock equipped with a liquid crystal display, time display (seconds / minutes / hours), calendar display (day / month / day / month age, etc.) and other displays (1/100 seconds, charge amount, mode, etc.) ), A multi-function electronic watch with multiple current consumptions. Therefore, multifunctional electronic watches equipped with solar cells tend to be insufficiently charged. Furthermore, since it is necessary to provide a plurality of display openings in the solar cell, the area required for power generation tends to be small and the generated power tends to be low.

In the above-mentioned multi-function electronic timepiece, conventionally, a solar cell in which a single cell is serialized to increase the output voltage is used together with a method of increasing the voltage by providing a booster circuit, thereby further increasing the current consumption. In order to obtain a corresponding output current, a dial plate through which light is easily transmitted is used.
Japanese Utility Model Publication No. 62-42390 JP 2003-204072 A

  In the conventional method, it is necessary to place restrictions on both charging performance and design. However, improvement of charging performance and diversification of design are always required, and further enhancement is desired.

  The method of disposing the ring-shaped solar cell of Patent Document 1 perpendicularly to the outer periphery of the dial plate does not require an opening for the solar cell in the dial plate, and can cope with diversification of design. However, since it is necessary to increase the solar cell area in order to secure the power generation for operating the multi-function electronic timepiece, there is a problem that the timepiece becomes thick.

  There is also a problem with the method of serializing solar cells. The output voltage of the solar cell is the sum of the output voltages of the single cells serialized. On the other hand, since the output current of the solar cell is determined by the minimum area of each single cell, if the number of divisions of the solar cell into a single cell is increased, the area of each single cell becomes smaller and the output current decreases. There is. In addition, a solar cell needs to have a gap for wiring connecting a single cell surface and a back surface of an adjacent single cell for series connection of single cells and a gap for insulation between single cells. , Present a dividing line dividing each single cell on the surface. When a dial plate that easily transmits light is used, this dividing line is visible, which has a problem of affecting the design.

  An object of the present invention is to provide a solar cell mounting structure that has good charging performance and can sufficiently cope with diversification of design in a multi-function electronic timepiece.

In order to solve the above problem, an electronic timepiece equipped with a solar cell according to the present invention is:
A planar solar cell arranged on the display surface such as time,
It has at least a ring solar cell on the outer periphery of the display surface, the light receiving surface being disposed substantially perpendicular to the display surface.

The planar solar cell is divided into separate cells along the first straight line with respect to a first straight line passing through the center of the watch and a second straight line that is substantially orthogonal to the first straight line and passes through the center of the watch.
The ring solar cell is divided into separate cells along the second straight line.

One of the individual cells of the planar solar cell and one of the individual cells of the ring solar cell are connected in parallel to form one group, and the groups are connected in series.

At least one of the planar solar cell and the ring solar cell is a single cell.

A metal dial having an opening for receiving light is disposed on the viewing side of the planar solar cell.

A translucent member is disposed in the light receiving opening.

Electrical connection between the planar solar cell and the ring solar cell,
It is characterized by being carried out on a circuit board arranged in the movement.

According to the first aspect of the present invention, since a plurality of solar cells are electrically connected, a larger amount of generated power than that of one solar cell can be obtained.
Specifically, when a plurality of solar cells are electrically connected in series, the output voltage can be secured by the total of the plurality of solar cells even when the number of divisions of one solar cell into a single cell is reduced. Thereby, since the single cell surface area of one solar cell can be enlarged, an output current can be improved. Therefore, it is possible to provide a multi-function electronic timepiece having good charging performance. In addition, it is possible to use a dial plate that is difficult to transmit light, so that it can be used for various designs.

Furthermore, when a plurality of solar cells are electrically connected in parallel, the output current can be improved by the sum of the plurality of solar cells. Therefore, it is possible to provide a multi-function electronic timepiece having good charging performance. In addition, it is possible to use a dial plate that is difficult to transmit light, so that it can be used for various designs.
Thereby, since the shortage of charging in the case where the opening is provided in the solar cell can be solved, it is possible to provide a multifunctional electronic timepiece having good charging performance. In addition, it is possible to use a dial plate that is difficult to transmit light, so that it can be used for various designs.
Furthermore, since the color of the turn ring that hides the ring-shaped solar cell can be darkened, the color of the ring-shaped solar cell can also be made inconspicuous, so the design can be further improved.

Further, by combining a plurality of solar cells with a planar solar cell arranged on the display surface and a ring solar cell having a light receiving surface arranged substantially perpendicular to the display surface on the outer periphery of the display surface, Can be received efficiently. In the planar solar cell and the ring solar cell, since the light receiving surfaces of the solar cells are arranged substantially perpendicular to each other, the light parallel to each light receiving surface that cannot receive light can also be received.
In addition, the ring solar cell can receive the light reflected by the dial plate, so it can generate power using the light reflected by the dial plate that could not be used only with the conventional planar solar cell. Can be improved.

  According to invention of Claim 3, since the group which consists of several solar cells electrically connected in parallel is electrically connected in series, the state by which some solar cells block light In this case, power can be generated by another solar cell connected in parallel, and the output voltage can be secured by connecting in series. Therefore, by supplementing the generated power with another solar cell, it is possible to provide a timepiece that is less affected by the environment in use.

  In particular, by dividing the cell dividing line between the planar solar cell and the ring solar cell approximately orthogonally, connecting the planar solar cell and the ring solar cell in parallel, and further connecting the group in series. For example, by hiding a part of the sleeve while wearing the watch, it is possible to secure a charging path even if light does not hit any of the divided cells, eliminating the disadvantage that the watch cannot be charged while wearing Is possible.

  According to the invention described in claim 4, since one solar cell is a single cell and there is no dividing line, even when a dial plate that easily transmits light is used, the dividing line is not seen, which affects the design. Can solve the problem. This is particularly effective for a planar solar cell that has a large area and stands out directly on the display surface.

According to the invention described in claim 5, the appearance of the timepiece can be improved by using the metal dial. Conventionally, when a metal dial that does not transmit light is placed on the upper surface of a planar solar cell in a watch with only a planar solar cell, a large opening is required to secure the amount of power generation, and the opening is halfway. The transparent member could not be arranged, and the color of the solar cell itself appeared in the opening. For this reason, the design restrictions are large, the appearance of the opening is also deteriorated, and the merit of using the metal dial is reduced.
In the present invention, since the power generation amount can be supplemented by the ring solar cell, it is not necessary to make the opening so large, and a semi-transmissive member can be used. Thereby, design restrictions can be eliminated and the original appearance of the metal dial can be achieved.
If the planar solar cell is made into a single cell, the dividing line does not appear in the opening, so that the appearance of the opening is further improved and the goodness of the metal dial can be further enhanced.

According to the invention described in claim 7, by connecting the planar solar cell and the ring solar cell on the circuit board, it is possible to connect without using complicated connection dedicated components.
In addition, since the connection state in series and parallel can be changed by, for example, changing the board wiring, it is possible to easily cope with a change in specifications.

[First embodiment]
1 is a plan view of an electronic timepiece according to an embodiment of the present invention as viewed from the dial side, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a plan view of a planar solar cell. 4 and 4 are perspective views of a ring-shaped solar cell.

  As shown in FIGS. 1 and 2, the electronic timepiece includes a case 9 that houses the timepiece module 4 and the like therein. A planar solar cell 1 is disposed on the upper surface of the timepiece module, and a dial 8 is disposed on the upper surface of the planar solar cell 1. The dial plate 8 employs a transflective dial plate having a property of transmitting light so that the planar solar cell 1 can generate electric power. A ring-shaped solar cell 2 is arranged on the outer periphery of the dial 8 in the gap between the dial 8 and the windshield 11. The timepiece module 4 includes a circuit board 3 that connects and controls the pointer mechanism, the solar cell, the pointer mechanism, and the like.

The planar solar cell 1 has electrodes 1a and 1b as shown in FIG. 3, and two connection springs 5a and 5b for the positive and negative electrodes pass through the hole of the watch module 4 and the back cover side. The generated power from the planar solar cell 1 is guided to the circuit board 3 by contacting the circuit board 3 arranged in the circuit board 3.
The ring-shaped solar cell 2 shown in FIG. 4 has a conductor 6 protruding from the solar cell, and is connected to a circuit board 3 arranged on the back cover side, and the generated power from the solar cell 2 is supplied to the circuit board 3. It leads to.
The planar solar cell 1 and the ring-shaped solar cell 2 are connected in series by a circuit on a circuit board. As a connection method on the circuit board, there are a method using wiring on the circuit board and a method using the charging control IC, and an appropriate method can be appropriately employed.
In addition, you may connect the planar solar cell 1 and the ring-shaped solar cell 2 directly in series with a connection member separately.

The electromotive voltage of the solar cell itself is 0.4 to 0.5 V, and the solar cell is divided into each divided portion because of insufficient voltage to charge the secondary battery (usually 1.0 V to 3.0 V). The voltage is gained by connecting the divided cells in series. The number of divided cells is determined by the voltage of the secondary battery.
The planar solar cell 1 shown in FIG. 3A is assumed to be charged with only the planar solar cell 1 by charging the secondary battery of about 2.0V to 2.5V, and is divided into 5 by the dividing line 1e. The divided cells 1f, 1g, 1h, 1i, and 1j are divided, and these divided cells 1f, 1g, 1h, 1i, and 1j are connected in series as shown in FIG.

  As the number of divided cells increases, the area of the divided cells themselves decreases and the amount of generated current decreases. Furthermore, in the case of having the openings 1c and 1d for liquid crystal display as shown in FIG. 3, the area is further reduced, and the amount of current is further reduced. When the planar solar cell 1 as shown in FIG. 3A is used, the number of divided cells of the planar solar cell 1 is reduced by using the ring-shaped solar cell 2 in combination, and the amount of generated current is reduced. You can earn.

  FIG. 3B shows an equivalent circuit diagram in the case where a single-cell ring-shaped solar cell 2 that is not divided into the planar solar cells 1 in a five-divided state in FIG. 3A is connected in series. Is shown. Actually, since a ring-shaped solar cell 2 is added, if a secondary battery of about 2.0 V to 2.5 V is used, the number of divisions of the planar solar cell 1 can be four. It is.

Furthermore, the planar solar cell 1 and the ring-shaped solar cell 2 are arranged so that the light receiving surfaces of the solar cells are substantially perpendicular to each other. It can receive light (see FIG. 2).
Moreover, since the ring-shaped solar cell 2 can also receive the light reflected by the dial plate 8, since it can also generate electric power using the light reflected by the dial plate 8 that could not be used only by the conventional planar solar cell 1, Furthermore, the light use efficiency can be improved (see FIG. 2).

The present embodiment is not limited to an electronic timepiece equipped with a liquid crystal, and can be applied to, for example, a multi-function electronic timepiece equipped with a plurality of display hands. A multi-hand timepiece equipped with a plurality of display hands is convenient because the interval between hands is increased, and the area of the ring-shaped solar cell 2 is inevitably increased.
Furthermore, the present invention may be applied to an electronic timepiece (skeleton model) having a large opening in design and allowing the inside of the module 4 to be visible. Furthermore, it is also effective in an electronic timepiece that does not have an opening but generates a large current consumption by having an alarm or the like.

[Modification 1]
Below, the effectiveness by using the ring-shaped solar cell 2 together is described in detail. The following planar solar cell will be described as a simple disk-like one for ease of explanation.
FIG. 5A shows a plan view of a conventional electronic timepiece having a planar solar cell 12. The electronic timepiece of FIG. 5 has only the planar solar cell 12 divided into four parts, and does not have the ring-shaped solar cell 2. As shown in the equivalent circuit diagram of FIG. 5B, the divisions are connected in series.

FIG. 6A shows a plan view of the electronic timepiece of the first modification.
This modification 1 is different from the first embodiment in that the planar solar cell 1 has openings 1c and 1d for mounting liquid crystal or the like, and the planar solar cell 1 is divided. The planar solar cell 13 of Modification 1 is divided into five single cells by the line 1e, but the planar solar cell 13 is not provided with an opening for mounting a liquid crystal or the like. The point is that the cell is divided into two single cells by the dividing line 13c. Other configurations are the same as those in the above embodiment.
FIG. 6B shows an equivalent circuit diagram. The divided cells 13a and 13b of the planar solar cell 13 and the ring-shaped solar cell 2 are connected in series.

The single cell area of the solar cell 13 of Modification 1 shown in FIG. 6 is twice that of the planar solar cell 12 of the conventional example shown in FIG. 5, and a double output current can be obtained. Moreover, the output voltage is ensured by connecting the ring-shaped solar cells 2 in series. That is, in the first modification, even when a thick transflective dial plate that does not easily transmit light is used, the generated power can be secured. It becomes easy to take a proper harmony. In the first place, the number of dividing lines is smaller than that of the conventional example, which is also aesthetically advantageous.
In the case of the modification of FIG. 6, the number of cell stages is one less than that of the conventional example of FIG. A secondary battery for a watch having an electromotive voltage of 5 V is generally commercially available, and there is no particular problem.

[Modification 2]
FIG. 7A shows a plan view of the electronic timepiece of the second modification.
The modification 2 is different from the above embodiment in that the planar solar cell 14 of the modification 2 is a single cell without a dividing line. Other configurations are the same as those in the above embodiment.
The single cell area of the solar cell 14 of Modification 2 is four times that of the planar solar cell 12 of the conventional example shown in FIG. 5, and an output current of four times can be obtained. Moreover, as shown in FIG.7 (b), the output voltage is ensured by connecting the ring-shaped solar cell 2 in series.
However, the number of cell series stages is two, the generated voltage is about 0.8 to 1.0 V, and the selection range of the battery is narrowed. Therefore, a booster circuit may be used in combination as necessary.
That is, in the second modification, even when a thick dial plate that does not easily transmit light is used, the generated power can be secured. It becomes easier to take harmony.

[Modification 3]
This modification is a modification in which a metal dial is applied to the first embodiment. The metal dial for a solar timepiece is an ordinary metal dial used for a primary battery type timepiece and provided with an opening for applying light to the solar cell. Compared to the transflective dial, it is excellent in decorativeness, but has a disadvantage that the amount of light irradiation is greatly reduced because light is not transmitted except at the opening.

FIG. 8 is a plan view of an electronic timepiece according to Modification 3. FIG. 9 is a cross-sectional view taken along the line III-III in FIG.
In the third modification, the metal dial 15 is used in the second modification. Here, the metal dial plate 15 as shown in FIG. 8 has openings 15a, 15b and 15c for the planar solar cell 14 to perform photovoltaic power generation. The metal dial plate 15 may be disposed directly on the planar solar cell 14 or may be superposed on the dial plate 16 that transmits light.

By connecting the planar solar cell 14 and the ring-shaped solar cell 2 in series, the planar solar cell 14 has an output voltage generated by photovoltaic power generation from the openings 15a, 15b and 15c and the ring-shaped solar cell 2. Can be supplemented. Furthermore, since the planar solar cell 14 is a single cell without a dividing line, it does not present a dividing line in the opening 15a.
That is, in the third modification, even when a metal dial that does not transmit light is used, the generated power can be secured by some of the openings 15a, 15b, and 15c, and there are no dividing lines. Can correspond to the design.

Moreover, even when the planar solar cell 14 has a dividing line, a design in which the dividing line is not visible can be realized by installing the dividing line peculiar to the solar cell in the non-opening portion of the metal dial.
Furthermore, since the ring-shaped solar cell 2 can generate generated power, the generated power does not run short even if the size of the openings 15a, 15b, 15c is small. Will be relaxed and design constraints will be greatly eliminated.

  Furthermore, since the ring-shaped solar cell 2 can also generate generated power, it is possible to apply the semi-transmissive member 25 that could not be used because of insufficient power in the past to the openings 15a, 15b, 15c. Become. This makes it possible to hide the color of the solar cell that has been visible in the past, so that the appearance is good and the color variation can be increased, so that a better design can be realized.

In addition, as shown in FIG. 9, when the translucent member 25 is configured to be directly fitted into the openings 15a, 15b, and 15c, the dial 16 can be eliminated. Alternatively, instead of applying the semi-transmissive member 25, the dial 16 can be a semi-transmissive member.
The former is advantageous for thinning, and the latter is advantageous in that the metal dial plate 15 can be easily manufactured and the cost can be reduced.

  Furthermore, since the metal dial plate 15 has a higher reflectance and more reflected light than the transflective dial plate, there is an advantage that the power generation amount of the ring-shaped solar cell 2 can be increased as compared with the transflective dial plate. If the reflectance of the outer peripheral portion of the metal dial plate 15 is increased to the vicinity of the central portion or more, this effect can be further enhanced.

[Modification 4]
In all the embodiments so far, the planar solar cell 1 (12, 13, 14) and the ring-shaped solar cell 2 are connected in series to increase the output voltage. 1 (12, 13, 14) and the ring-shaped solar cell 2 have the same number of divisions (including the case of a single cell), that is, on the premise that the output voltage as the solar cell is the same (if the voltage is not the same, the low voltage Both of them may be connected in parallel.
FIG. 7C shows an equivalent circuit diagram in the case where the planar solar cell 14 and the ring-shaped solar cell 2 are connected in parallel.
By connecting in parallel, the output current can be increased. The parallel connection is suitable for a multi-function timepiece that drives a heavy load such as a buzzer or a sensor that requires a large current. However, since the output voltage decreases, there are cases where the combined use of a booster circuit or the like should be considered as appropriate when charging the secondary battery.

  In the above modification, how many division stages of each solar cell, in particular, a planar solar cell, or how to connect each cell (or single cell) (series-parallel), What is necessary is just to select suitably according to the circuit system of the electronic timepiece to apply, decorativeness (design), etc.

[Second Embodiment]
2nd Example is an Example which shows that the effect which is not in the past can be produced by devising the division | segmentation and connection of each solar cell.
FIG. 10 is a plan view of the electronic timepiece of the second embodiment, and FIG. 11 is an electric circuit diagram of the solar cell portion.

  The planar solar cell 17 (a combination of 17a and 17b) is divided into cells 17a and 17b with a straight line L1 connecting the 3 o'clock direction (the crown 22 side) and the 9 o'clock direction (the opposite side of the crown 22) as a boundary. The ring-shaped solar cell 18 (a combination of 18a and 18b) is divided into upper and lower parts as divided cells 18a and 18b with a straight line L2 connecting the 12 o'clock direction and the 6 o'clock direction as a boundary. Reference numerals 19a and 19b are connection springs for the divided cell 17a, and reference numeral 21 is a conductor for the divided cell 18b.

  As shown in the electric circuit diagram of FIG. 11, the divided cells 17a and 18a are connected in parallel by a circuit on a circuit board to form a group a. The divided cells 17b and 18b are the same, and are connected in parallel by a circuit on the circuit board to form a group b. Group a and group b are connected in series in a circuit on the circuit board. Each divided cell may be directly connected by a separate connecting member.

  Here, according to the electronic timepiece as shown in FIG. 10, for example, even if the right half of the timepiece is covered by the long sleeve 30 and the divided cell 17b is hidden, the generated power is secured by the other single cells 17a, 18a, and 18b. can do. If it demonstrates in FIG. 11, since the split cell 17b of group b does not hit light, it will be in a non-power generation state and will be in a disconnection state in the part of the split cell 17b practically. However, since the split cell 18b is generating electric power, the charging path is not interrupted, and charging of the storage battery (not shown) can be continued.

As described above, in the case of the conventional planar solar cell 17 and the ring-shaped solar cell 18 alone, it is possible to charge the storage battery because it becomes impossible to charge the storage battery because a part of the divided cells becomes a non-power generation state. This can be avoided by using the cell, dividing the dividing line of each solar cell in a substantially orthogonal state, and devising the connection.
Of course, the present invention is not limited to an event in which the watch is covered with a long sleeve, and the same applies to the case where the left half, the upper half, and the lower half are covered.

  About the above embodiment and modification of this invention, a various deformation | transformation is possible in the range which does not deviate from the summary. For example, a combination of planar solar cells, a combination of ring-shaped solar cells, or a combination of three or more solar cells.

1 is a plan view of an electronic timepiece according to a first embodiment of the present invention. II-II arrow sectional drawing of FIG. (A) is a top view of the planar solar cell in 1st Embodiment of this invention, (b) is the equivalent circuit schematic. The perspective view of the ring-shaped solar cell in 1st Embodiment of this invention. (A) is a top view of the electronic timepiece which mounts the solar cell of a prior art example, (b) is the equivalent circuit schematic. (A) is a top view of the electronic timepiece in the modification 1 of 1st Embodiment of this invention, (b) is the equivalent circuit schematic. (A) is a top view of the electronic timepiece in the modification 2 of 1st Embodiment of this invention, (b) is an equivalent circuit schematic at the time of series connection, (c) is an equivalent circuit schematic at the time of parallel connection. The top view of the electronic timepiece in the modification 3 of 1st Embodiment of this invention. III-III arrow sectional drawing of FIG. The top view of the electronic timepiece in 2nd Embodiment of this invention. It is an equivalent electric circuit diagram of the solar cell part of the electronic timepiece in the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Planar solar cell 1a Positive electrode 1b Negative electrode 1c Opening 1
1d opening 2
1e Planar Solar Cell Dividing Line 2 Ring-shaped Solar Cell 3 Circuit Board 4 Clock Module 5a, 5b Connection Spring 6 Conductor 7 Turn Ring 8 Dial 9 Case 10 Back Cover 11 Windshield 12 Conventional Solar Cell 12a Conventional Solar Cell Dividing Line 13 Planar Solar Cell 13c Representing Variation 1 of the First Embodiment of the Present Invention Planar Solar Cell Dividing Line 14 Representing Variation 1 of the First Embodiment of the Present Invention Planar solar cell 15 representing modification 2 of the first embodiment of the present invention Metal dial 15a, 15b, 15c Metal dial opening 16 Dial 17 of an electronic timepiece according to the second embodiment of the present invention A planar solar cell 17a, 17b representing a second embodiment of the present invention A single cell 18 of a planar solar cell representing a second embodiment of the present invention Ring-shaped representing a second embodiment of the present invention Raseru 18a, 18b a single cell 19a of the ring-shaped solar cell representing a second embodiment of the present invention, 19b conductor 22 crown 30 Long sleeve in a second embodiment of a connection spring 21 present invention in a second embodiment of the present invention

Claims (5)

A solar cell mounted electronic timepiece having a solar cell as a power generation means,
A planar solar cell arranged on the display surface such as time,
Wherein the outer periphery of the display surface, and at least have a ring solar cells substantially perpendicular to the light receiving surface on the display surface is arranged,
The planar solar cell is divided into separate cells along the first straight line with respect to a first straight line passing through the center of the watch and a second straight line that is substantially orthogonal to the first straight line and passes through the center of the watch.
The solar cell-mounted electronic timepiece, wherein the ring solar cell is divided into separate cells along the second straight line . One of the divided cells of one said ring solar cell division cells of the planar solar cells but are connected in parallel to form a group, the group each other according to claim 1, characterized in that connected in series Electronic watch with solar cell. The viewing side of the planar solar cells, solar cells mounted electronic timepiece according to any one of claims 1 to 2, characterized in that a metal dial provided with an opening for receiving. 4. The solar cell mounted electronic timepiece according to claim 3 , wherein a semi-transmissive member is disposed in the light receiving opening. Electrical connection between the planar solar cell and the ring solar cell,
Solar cell mounting electronic timepiece according to any one of claims 1 to 4, characterized in that the arrangement is the circuit board inside the movement.

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