Rosenberg, Klein & Lee
Current regulator and method for efficiency improvement of a LED display system
For efficiency improvement of a LED display system including a charge pump and a LED connected to either the voltage input terminal or the voltage output terminal of the charge pump, either one or both of two current regulators are enabled according to a voltage detected from the LED, for establishing a driving current for the LED. When the detected voltage is higher than a threshold, the first one of the current sources is enabled sole. When the detected voltage is lower than the threshold, the second one of the current sources is enabled sole, or both the current sources are enabled, or the current sources are alternatively enabled.
Richtek Technology Corp.
H
H05B
inventional
Jien-Sheng Shui-Mu Tsung-Wei
Chen Lin Huang