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    • 7. 发明申请
    • BACKLIGHT UNIT AND DISPLAY APPARATUS HAVING THE SAME
    • 背光单元和显示装置
    • US20130235090A1
    • 2013-09-12
    • US13549916
    • 2012-07-16
    • Kyung-Uk CHOIByeong Doo KANGChang Sin KIMJEONG BONG LEE
    • Kyung-Uk CHOIByeong Doo KANGChang Sin KIMJEONG BONG LEE
    • G09G5/10H05B37/02
    • H05B33/0827G09G3/342G09G2320/0633G09G2330/021G09G2330/06
    • A backlight unit includes light source units which emit light, and light source driving integrated circuits which control a brightness of the light source units, respectively. Each of the light source driving integrated circuits includes a current generator which generates a first current and a second current, a current level controller which controls a current value of the first current in response to duty ratio information of a pulse width modulation signal, a voltage supply unit which outputs a voltage corresponding to the second current, an output buffer unit which outputs the voltage from the voltage supply unit, and a driving switch unit which drives the light source units to allow a current corresponding to the voltage provided from the output buffer unit to flow through the light source units, where current values of the second current and the first current are the same as each other.
    • 背光单元包括发光的光源单元和分别控制光源单元的亮度的光源驱动集成电路。 每个光源驱动集成电路包括产生第一电流和第二电流的电流发生器,电流电平控制器,其根据脉宽调制信号的占空比信息控制第一电流的电流值,电压 供给单元,其输出与第二电流对应的电压;输出缓冲器单元,其输出来自电压供给单元的电压;以及驱动开关单元,其驱动光源单元,以允许与从输出缓冲器提供的电压相对应的电流 单元流过光源单元,其中第二电流和第一电流的电流值彼此相同。