| 摘要 |
It is an object to provide a light-emitting device whose light is not entirely turned off owing to disconnection (an insulation defect) in part of light-emitting elements and the whole of which can be driven by one constant current supply without causing variation in brightness. Further, it is an object to provide a light-emitting device in which brightness can be adjusted. In addition, it is an object to provide a light-emitting device in which change in properties of light-emitting elements over time due to the use thereof is less likely to appear as variation in brightness. In order to achieve the above object, a light-emitting device in which a plurality of light-emitting panels are connected to a constant current supply controlled by a light-emission control unit may be used, and each of the light-emitting panels may be sequentially driven, independently. The plurality of light-emitting panels provided in the light-emitting device may be used evenly so that difference in total operating time is not caused among them. |
