| 摘要 |
A solar panel (3) of the present invention, above which a pointer (7) mounted on a pointer shaft (6) inserted in a through hole (3a) in a center portion of the solar panel moves, includes a plurality of solar cells (11-16) arranged in a substantially circular shape, and these solar cells (11-16) have been divisionally formed into a substantially spiral shape so that the pointer is positioned over two of the plurality of solar cells (11-16). Accordingly, the pointer (7) can always be positioned over two of the plurality of solar cells (11-16), and therefore a decrease of light-receiving area due to the pointer (7) can be distributed between the two solar cells (11-16). As a result, a decrease in the output current of the plurality of solar cells (11-16) over which the pointer (7) is positioned can be suppressed, and the output current of the entire plurality of solar cells (11-16) can be improved. |
