| 发明名称 |
Control circuit for backlight, a control method and a liquid crystal display device. |
| 摘要 |
The disclosure shows a control circuit for backlight, a control method and a liquid crystal display device. The control circuit includes a display driving chip used to generate a video frame data enable signal and a first PWM signal; a pulse width modulation control circuit for receiving the video frame data enable signal and the first PWM signal, and modulating a duty ratio of the first PWM signal under the video frame data enable signal control to get a second PWM signal; a backlight driving chip for receiving the second PWM signal, and controlling brightness of the backlight based on the second PWM signal to increase brightness of the backlight during a frame data disable period of the video frame data enable signal. Decreasing brightness in liquid crystal display device caused by leakage characteristic of thin film transistor is solved through the disclosure to achieve consistent brightness. |
| 申请公布号 |
US2017103710(A1) |
申请公布日期 |
2017.04.13 |
| 申请号 |
US201615007603 |
申请日期 |
2016.01.27 |
| 申请人 |
Wuhan China Star Optoelectronics Technology Co., Ltd. |
发明人 |
ZUO Qingcheng |
| 分类号 |
G09G3/34;G09G3/36 |
主分类号 |
G09G3/34 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A control circuit for backlight, comprising:
a display driving chip used to generate a video frame data enable signal and a first PWM signal; a pulse width modulation control circuit for receiving the video frame data enable signal and the first PWM signal, and modulating a duty ratio of the first PWM signal under the video frame data enable signal control to get a second PWM signal; a backlight driving chip for receiving the second PWM signal, and controlling brightness of the backlight based on the second PWM signal to increase brightness of the backlight during a frame data disable period of the video frame data enable signal. |
| 地址 |
Wuhan CN |
