公开(公告)号：US20100033415A1

公开(公告)日：2010-02-11

申请号：US12409681

申请日：2009-03-24

Applicant: Hyeon-Seok BAE ,  Sang-Chul LEE ,  Kwang-Youl LEE

Inventor： Hyeon-Seok BAE ,  Sang-Chul LEE ,  Kwang-Youl LEE

IPC: G09G3/36

CPC classification number: G09G3/3696 ,  G09G2330/02

Abstract: A liquid crystal display includes; a liquid crystal panel, and a DC-DC converter which receives an input voltage to generate an analog drive voltage and a gate-on voltage used to operate the liquid crystal panel, wherein the DC-DC converter includes a pulse width modulation circuit which modulates a pulse width of the analog drive voltage and the gate-on voltage, a boost converter which boosts the input voltage to output the analog drive voltage, and a charge pump which boosts one of the input voltage and the analog drive voltage to output the gate-on voltage, wherein when a high voltage stress test is performed, the DC-DC converter outputs the analog drive voltage boosted to a voltage level higher than a voltage level of the analog drive voltage during a normal operation, and outputs the gate-on voltage having a voltage level substantially equal to a voltage level of the gate-on voltage during the normal operation.

Abstract translation: 液晶显示器包括： 液晶面板和接收输入电压以产生用于操作液晶面板的模拟驱动电压和栅极导通电压的DC-DC转换器，其中DC-DC转换器包括调制脉冲宽度调制电路 模拟驱动电压和栅极导通电压的脉冲宽度，升压输入电压以输出模拟驱动电压的升压转换器，以及升压输入电压和模拟驱动电压之一以输出门极的电荷泵 - 其中当执行高压应力测试时，所述DC-DC转换器在正常操作期间将升压的模拟驱动电压输出到高于模拟驱动电压的电压电平的电压电平，并且输出门极导通 电压具有在正常操作期间基本上等于栅极导通电压的电压电平的电压电平。