Patent ID: 7605807

Claim:
A control circuit for balancing current, employed in a thin display, comprising: a light source, which includes a plurality of parallel light-emitting diode (LED) rows, wherein each of the LED rows includes: at least one LED; and a first switch unit that is in series connection with the LED for determining whether a current passes through each of the LED rows; a power supply that is in series connection with the light source for providing the LEDs with a working power; a control part that detects the current of the LED rows, controls an on-state timing ratio of the first switch unit, and controls an output power of the power supply; and a short circuit connected in parallel with the LED for connecting two ends of an open circuit caused by a broken LED, wherein the short circuit comprises: a trigger part; and a second switch unit, wherein the trigger part detects the open circuit caused by the broken LED, and then the trigger part triggers the second switch unit to be at on-state for connecting the two ends of the open circuit.