公开(公告)号：US08890428B2

公开(公告)日：2014-11-18

申请号：US13710904

申请日：2012-12-11

Applicant: LG Display Co., Ltd.

Inventor： Younghun Ahn ,  Jongdae Kim ,  Sanggyu Kim ,  Byunggi Yoon ,  Minwoo Park

IPC: H05B37/02 ,  H05B39/04 ,  G05F1/00 ,  G09G3/34 ,  G09G3/00

CPC classification number: H05B37/02 ,  G09G3/00 ,  G09G3/3406 ,  G09G2320/064 ,  G09G2330/022

Abstract: An apparatus for driving a light source of a backlight unit includes: light sources; and a light source driver operating in an idle mode according to an input dimming signal and reducing a dimming value of an output dimming signal for adjusting brightness of the light sources by stages by mixing PWM control and PWM count control in a time-series manner to thus implement low dimming in the idle mode, wherein the dimming value of the output dimming signal is lowered to a first dimming value through the PWM control during a first period and subsequently lowered to a second dimming value lower than the first dimming value through the PWM count control during a second period that follows the first period.

Abstract translation: 用于驱动背光单元的光源的装置包括：光源; 以及根据输入调光信号工作在空闲模式的光源驱动器，并且通过以时间序列方式混合PWM控制和PWM计数控制，降低输出调光信号的调光值，以逐级调节光源的亮度，以 从而在空闲模式下实现低调光，其中输出调光信号的调光值在第一时段期间通过PWM控制降低到第一调光值，随后通过PWM降低到低于第一调光值的第二调光值 在第一个时期之后的第二个时期内进行计数控制。