Invention Grant
US08319442B2 LED array control circuit with voltage adjustment function and driver circuit and method for the same
有权
LED阵列控制电路具有电压调节功能和驱动电路及方法相同
- Patent Title: LED array control circuit with voltage adjustment function and driver circuit and method for the same
- Patent Title (中): LED阵列控制电路具有电压调节功能和驱动电路及方法相同
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Application No.: US12800845Application Date: 2010-05-24
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Publication No.: US08319442B2Publication Date: 2012-11-27
- Inventor: Shui-Mu Lin , Ti-Ti Liu
- Applicant: Shui-Mu Lin , Ti-Ti Liu
- Applicant Address: TW Hsin-Chu
- Assignee: Richtek Technology Corporation
- Current Assignee: Richtek Technology Corporation
- Current Assignee Address: TW Hsin-Chu
- Agency: Tung & Associates
- Priority: TW99105489A 20100225
- Main IPC: H05B37/00
- IPC: H05B37/00

Abstract:
The present invention discloses an LED array control circuit with voltage adjustment function and a driver circuit and a method for the same. The LED array includes multiple LED strings each of which has multiple LED devices connected in series. The LED array control circuit includes: a power supply circuit for providing a supply voltage to the LED array; and an LED driver circuit for controlling current through each LED string, the LED driver circuit including: multiple current sources corresponding to the multiple LED strings respectively, each current source having a first end which is coupled to a corresponding LED string, and a second end; and a voltage adjustment circuit for adjusting a voltage of the second end of a corresponding current source according to a signal indicating a voltage drop across the corresponding LED string.
Public/Granted literature
- US20110204797A1 LED array control circuit with voltage adjustment function and driver circuit and method for the same Public/Granted day:2011-08-25
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