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

LED array control circuit with voltage adjustment function and driver circuit and method for the same
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.
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