发明申请
- 专利标题： Backlight control circuit
- 专利标题（中）： 背光控制电路
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申请号： US11455918申请日： 2006-06-19
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公开(公告)号： US20060284576A1公开(公告)日： 2006-12-21
- 发明人: Kun Le , Tong Zhou
- 申请人： Kun Le , Tong Zhou
- 专利权人： INNOLUX DISPLAY CORP.
- 当前专利权人： INNOLUX DISPLAY CORP.
- 优先权： TW94120180 20050617
- 主分类号： H05B39/00
- IPC分类号： H05B39/00
摘要：
An exemplary backlight control circuit (200) includes two backlight inspecting circuits (210), a pulse width modulation integrated circuit (PWM IC) (250) having a current sampling pin (251), a first transistor (271), and an input circuit (230). Each backlight inspecting circuit includes a backlight (211) and an output end (212). The input circuit includes a second transistor (233), a resistor (232), and two diodes (231). The source electrodes of the first and second transistors grounded. The drain electrode of the first transistor is connected to the current sampling pin. The gate electrode of the first transistor and the drain electrode of the second transistor are connected to a power supply. The gate electrode of the second transistor and the positive terminals of the diodes are connected to the power supply via the resistor. The negative terminals of the diodes are respectively connected to the output ends of the backlight inspecting circuit.