| 摘要 |
An electronic timepiece that receives signals and displays information can be driven using solar power while suppressing antenna sensitivity loss to a sufficiently low level. An electronic timepiece has a dial, on the face of which time is displayed, a flat antenna, and a solar cell. The flat antenna is disposed in an area on the back side of the dial, extends in the plane direction of the dial, and receives signals passing through the dial. The solar cell is also disposed in the area on the back side of the dial, positioned vertically between the dial and the flat antenna. The solar cell also extends in the plane direction of the dial. |
| 主权项 |
1. An electronic timepiece that receives radio frequency signals and displays information, comprising:
a dial on a front of the electronic timepiece and on which time is displayed, the dial having a surface defining a plane; a flat antenna that is disposed in an area on a back side of the dial, parallel to the plane of the dial, and receives the radio frequency signals passing through the dial; a photovoltaic device that is disposed vertically between the dial and the flat antenna, and is parallel to the dial and the flat antenna; and a hand that is disposed at a face side of the dial; wherein the flat antenna is not superimposed on the hand in plan view, the flat antenna is square in plan view, and when viewed in a plan view, the shortest distance between a side of the flat antenna and a parallel facing edge of a through hole of the photovoltaic device is at least 0.2 times a length of the side of the flat antenna. |
