公开(公告)号：US08982115B2

公开(公告)日：2015-03-17

申请号：US13712750

申请日：2012-12-12

Applicant: LG Display Co., Ltd.

Inventor： ChangYong Sung ,  SungJoon Moon ,  SeYeon Kim ,  SeongHun Choi

IPC: G09G3/36 ,  G02F1/1362 ,  G02F1/1368

CPC classification number: G02F1/136204 ,  G02F1/1368 ,  G09G3/36 ,  G09G3/3648 ,  G09G3/3674 ,  G09G2310/0245 ,  G09G2330/04

Abstract: A liquid crystal display device discharges residual charge within the liquid crystal display panel. The liquid crystal display device comprises pixels defined by gate lines and data lines intersecting with each other and switching elements for driving the plurality of pixels; a level shifter comprising a first transistor connected between a gate-on voltage terminal and an output terminal and a second transistor connected between a gate-off voltage terminal and the output terminal to selectively output either the gate-on voltage or gate-off voltage to the plurality of gate lines; and a discharge circuit forming a discharge path connecting the gate-off voltage terminal and the ground terminal. The second transistor is turned on during the power-on of the liquid crystal display panel to apply the gate-off voltage. The discharge circuit is turned on to discharge the residual charge of the liquid crystal display panel through the discharge path.

Abstract translation: 液晶显示装置在液晶显示面板内排出残留电荷。 液晶显示装置包括由彼此相交的栅极线和数据线限定的像素和用于驱动多个像素的开关元件; 电平移位器，包括连接在栅极导通电压端子和输出端子之间的第一晶体管和连接在栅极截止电压端子和输出端子之间的第二晶体管，以选择性地将栅极导通电压或栅极截止电压输出到 多个栅极线; 以及形成连接栅极截止电压端子和接地端子的放电路径的放电电路。 第二晶体管在液晶显示面板的通电期间导通，以施加栅极截止电压。 放电电路导通，通过放电路径排出液晶显示面板的剩余电荷。