| 摘要 |
A display device is provided to regulate the brightness of a light source according to brightness of an external light, thereby improving the visibility and reducing the power consumption. A light sensor unit(210) outputs a sensing signal in response to brightness of external light. A driving chip(300) includes a dimming controller(310) for comparing the sensing signal with a comparative signal to output a dimming control signal, a mode selector(320) for outputting a first mode selection signal and a second mode selection signal in response to the dimming control signal, and a first light source driver(330) for outputting a first light source driving signal in response to the first mode selection signal. A light source driving unit(400) includes a second light source driver(410) for outputting a second light source driving signal higher than the first light source driving signal in response to the second mode selection signal. A light source(500) generates light in response to the first light source driving signal and the second light source driving signal. A display panel displays an image by using the generated light. |
