Ampower Technology Co., Ltd.

Cheng-Hung Tsai

Chin-Po Cheng

Yong-Long Lee

An exemplary light emitting diode (LED) driving system includes a direct current/direct current (DC/DC) converter, a detection circuit, a control circuit, a pulse width modulation (PWM) controller, and a current balance circuit. The DC/DC converter outputs a suitable direct current voltage to drive an LED array. The detection circuit detects cathode voltages of LED strings of the LED array. The control circuit generates and outputs a control signal to the PWM controller, and generates and outputs various adjusting signals. The current balance circuit adjusts current flowing through two of the LED strings, which have a minimum and a maximum detected cathode voltage, respectively. The current balance circuit includes switches. A related LED driving method is also provided.

LED driving system and method

A light emitting diode (LED) driving system driving a LED array of a display device includes a converter circuit, a pulse width modulator (PWM) controller, a 2D parameter circuit, a 3D parameter circuit and a microcontroller. The 3D parameter circuit outputs 3D parameter control signals when the display device is in a 3D mode, and stops from generating the 3D parameter control signals when the display device is in a 2D mode. The PWM controller outputs PWM signals to control the converter circuit according to outputs of the 2D parameter circuit and the 3D parameter circuit.

Growing community of inventors

Taoyuan, Taiwan

Cheng-Hung Tsai