| 摘要 |
PURPOSE:To obtain an electronic timepiece having no crown or a button, by generating a switching signal by intermittently applying continuous light to a light receiving element by a light blocking object. CONSTITUTION:When continuous light is intermittently applied to the respective light receiving element of a light receiving circuit part 3 by a light blocking object such as a finger, switching pulse lines coming to a high level, when light is blocked, are outputted from inverters INV1-INV4 and time correction is performed by an input circuit or a control circuit. By using the switch provided with this constitution, an electronic timepiece having no crown or a button is obtained. |
