Invention Grant
US07973760B2 Backlight control circuit with input circuit including diode and capacitor
有权
背光控制电路，输入电路包括二极管和电容
- Patent Title: Backlight control circuit with input circuit including diode and capacitor
- Patent Title (中): 背光控制电路，输入电路包括二极管和电容
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Application No.: US11974803Application Date: 2007-10-16
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Publication No.: US07973760B2Publication Date: 2011-07-05
- Inventor: He-Kang Zhou , Jian-Hui Lu , Tong Zhou
- Applicant: He-Kang Zhou , Jian-Hui Lu , Tong Zhou
- Applicant Address: CN Shenzhen, Guangdong Province TW Miao-Li County
- Assignee: Innocom Technology (Shenzhen) Co., Ltd.,Chemei Innolux Corporation
- Current Assignee: Innocom Technology (Shenzhen) Co., Ltd.,Chemei Innolux Corporation
- Current Assignee Address: CN Shenzhen, Guangdong Province TW Miao-Li County
- Agent Wei Te Chung
- Priority: TW95138083A 20061016
- Main IPC: G09G3/36
- IPC: G09G3/36
Abstract:
An exemplary backlight control circuit (200) includes a DC power supply (VDD), a load circuit (210), an input circuit (230), and a PWM IC (250). The load circuit includes two light sources (2113, 2114) and a rectifier and filter circuit (213). The input circuit includes a diode (231) and a capacitor (237). The PWM IC includes a current sampling pin (251) and an overvoltage protection pin (253). A low voltage terminal of a first one of the two light sources is connected to the current sampling pin via the rectifier and filter circuit, and a low voltage terminal of a second one of the two light sources is connected to a cathode of the diode. An anode of the diode is connected to the DC power supply and grounded via the capacitor. The overvoltage protection pin is connected to the DC power supply.
Public/Granted literature
- US20080088257A1 Backlight control circuit with input circuit including diode and capacitor Public/Granted day:2008-04-17
Information query
IPC分类:
