McDermott Will & Emery LLP
LED driving device
Disclosed herein is a light emitting diode (LED) driving device for driving a multi-channel LED element or an LED array for each channel, the LED driving device including: a constant current driver driving currents flowing in each channel; and a minimum voltage selector receiving voltage levels of each channel and selecting a minimum voltage level to thereby feedback the selected minimum voltage level to the constant current driver, wherein matching characteristics of currents flowing in each channel is improved and a size of an integrated circuit (IC) chip is also reduced as compared to a case according to the related art, thereby making it possible to reduce a production cost and satisfy the trend of miniaturization of the chip, while solving a performance deterioration problem due to deterioration of the matching of the currents between the channels.
Samsung Electro-Mechanics Co., Ltd.
H H H
H05B H05B H05B
additional inventional inventional
Jung Sun Seung Kon Joon Youp Bo Hyun Jung Hyun Jae Shin
Kwon Kong Sung Hwang Kim Lee