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 Electronic unit

Details
Inventors: Ito, Yukio; Kashikie, Junsuke; Fujii, Teruhiko;
Assignee: Citizen Watch Co., Ltd. (Tokyo, JP)
Primary Examiner: Diamond; Alan
Assistant Examiner:
Attorney, Agent or Firm: Kanesaka & Takeuchi

In an electronic device having a solar cell and a unit driven by a power generated by the solar cell, the solar cell 10 includes a transparent substrate 12; a plurality of conductive portions 14a to 14d provided around the transparent substrate 12 and connected in series; and a plurality of photocells 18, each having a thin-line shape, formed at proper intervals on the transparent substrate 12 and connected to the conductive portions 14a to 14d. By forming a transparent electrode film 80 on the transparent substrate 12 and by connecting the transparent electrode film 80 to the ground, an adverse influence of static electricity is prevented.

DETAILED DESCRIPTION What is claimed is: 1.
An electronic device comprising: a unit including a display member to display data, and a cover surrounding the display member and having an inner area, and a translucent solar cell connected to the unit for generating power to drive the unit and including a transparent cell substrate having an outer area greater than the inner area of the cover; a plurality of conductive portions provided at the outer area on the cell substrate around the display member and connected in series so that the conductive portions are concealed by the cover; and a plurality of photocells, each having a thin-line shape, formed at intervals on the cell substrate and connected to the conductive portions.
2.
The electronic device according to claim 1, wherein the photocells each having a thin-line shape are formed on the cell substrate at regular intervals.
3.
The electronic device according to claim 1, wherein each photocell having the thin-line shape is formed so as to extend from one of the conductive portions in a direction crossing the cell substrate.
4.
The electronic device according to claim 3, wherein each photocell having the thin-line shape extends so as to cross the cell substrate to a position near a corresponding conductive portion to have a gap between the photocell and the corresponding conductive portion, said gap being located outside the display member.
5.
The electronic device according to claim 1, wherein the photocells are connected to the conductive portions so that same electromotive force is obtained from each of the plurality of conductive portions.
6.
The electronic device according to claim 5, wherein the photocells are connected to the conductive portions so that total areas of the photocells connected to each conductive portion are equal to each other.
7.
The electronic device according to claim 1, wherein each photocell of the thin-line shape has a width in a range from 3% to 30% of an interval.
8.
The electronic device according to claim 1, wherein a part of the conductive portions is formed as an output terminal for supplying power from the translucent solar cell to the unit



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