| 摘要 |
<p>A display lamp lights up using commercial power at normal time and lights up using a storage battery built in the lamp in case of power outage. Provided is a display lamp which can emit light for a long time reducing the consumption power of the storage battery (7) in case of power outage. An optical source (2) is intermittently lighted by use of the power of the storage battery (7) by controlling the discharge of the storage battery (7) by using a timer, an optical sensor (8), or a human sensor (10). When the light is on, light is stored in a light storage plate (5). When the light is off, the display lamp (1) is allowed to emit light by the remaining light of the light storage plate (5).</p> |
