公开(公告)号：US10417980B2

公开(公告)日：2019-09-17

申请号：US15716128

申请日：2017-09-26

Applicant: LG Display Co., Ltd.

Inventor： Joohee Lee ,  Yongwon Jo

IPC: G09G3/36

Abstract: A liquid-crystal display device and a driving method thereof are disclosed. The driving method of the liquid-crystal display device comprises: converting data of an input image into a positive gamma reference level voltage and a negative gamma reference voltage to generate a positive data voltage and a negative data voltage; selecting between the positive data voltage and the negative data voltage in response to a polarity control signal and supplying the selected data voltage to data lines; generating a compensated voltage based on the difference between a dummy data voltage and a preset gamma reference level voltage; and increasing the high-potential power supply voltage by an amount equal to the compensated voltage and decreasing the low-potential power-supply voltage by the amount equal to the compensated voltage.