公开(公告)号：US09019187B2

公开(公告)日：2015-04-28

申请号：US13728028

申请日：2012-12-27

Applicant: LG Display Co., Ltd.

Inventor： TaeWoong Moon ,  YounGyoung Chang ,  ChongHun Park ,  IlKi Jung

IPC: G09G3/36

CPC classification number: G09G3/3685 ,  G09G2300/0413 ,  G09G2310/0297 ,  G09G2320/045

Abstract: The present invention relates to a liquid crystal display (LCD) device. More particularly, the present invention relates to an LCD device including a thin film transistor (TFT) compensation circuit in an LCD device which implements a driving circuit by using an oxide TFT, the LCD device capable of compensating for degraded characteristics of a TFT due to threshold voltage shift. As the compensation circuit including a dummy TFT is formed on a non-active area of the LC panel, the degree of threshold voltage shift of the DT due to a DC voltage can be sensed. Based on the sensed result, a threshold voltage of a second TFT can be compensated. This can reduce lowering of a device characteristic.

Abstract translation: 本发明涉及液晶显示（LCD）装置。 更具体地说，本发明涉及一种LCD装置，其包括在通过使用氧化物TFT实现驱动电路的LCD装置中的薄膜晶体管（TFT）补偿电路，该LCD装置能够补偿由于 阈值电压偏移。 由于包括虚拟TFT的补偿电路形成在LC面板的非有源区域上，所以可以感测到由于DC电压引起的DT的阈值电压偏移程度。 基于感测结果，可以补偿第二TFT的阈值电压。 这可以降低设备特性的降低。