Asian Power Devices Inc.

Cheng-Chang Yang

Yu-Chi Lai

Guang-Ming Lei

A light emitting diode (LED) circuit having even current has multiple LED strings, a current equalizing integrated circuit (IC) and a voltage compensation module. The LED strings are connected to an external power source, and each LED string has a power terminal and a driving terminal. The current equalizing IC has multiple driving pins connected respectively to the driving terminals of the LED strings. The voltage compensation module is connected between the LED strings and the external power source and has a threshold voltage value and multiple input terminals. The input terminals are connected respectively to the driving pins of the current equalizing IC to allow the voltage compensation module rise and send the voltage obtained from the external power source to the LED strings when the voltage compensation module determines any voltage on the driving pins of the current equalizing IC is lower than the threshold voltage value.

Growing community of inventors

Taoyuan, Taiwan

Cheng-Chang Yang