US 11,967,296 B2
Liquid crystal display device and driving method thereof
Zeyao Li, Chongqing (CN); and Rongrong Li, Chongqing (CN)
Assigned to CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Chongqing (CN); and HKC CORPORATION LIMITED, Shenzhen (CN)
Filed by CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Chongqing (CN); and HKC CORPORATION LIMITED, Guangdong (CN)
Filed on Oct. 3, 2022, as Appl. No. 17/958,557.
Claims priority of application No. 202111274828.2 (CN), filed on Oct. 29, 2021.
Prior Publication US 2023/0138585 A1, May 4, 2023
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3677 (2013.01) 14 Claims
OG exemplary drawing
 
1. A driving method of a liquid crystal display device, comprising:
detecting whether a light leakage has occurred in the liquid crystal display device; and
adjusting a turn-off voltage output from a gate driver to a gate of a switch element to reduce an absolute value of a voltage difference between the turn-off voltage and a common voltage, when the light leakage has occurred in the liquid crystal display device,
wherein said adjusting the turn-off voltage output from the gate driver to the gate of the switch element to reduce the absolute value of the voltage difference between the turn-off voltage and the common voltage comprises:
boosting up the turn-off voltage to reduce the absolute value of the voltage difference between the turn-off voltage and the common voltage when an active layer of the switch element is an N-type doped semiconductor material layer, wherein the active layer has a high trap density, the turn-on voltage>the common voltage>the turn-off voltage; and
stepping down the turn-off voltage to reduce the absolute value of the voltage difference between the turn-off voltage and the common voltage when the active layer of the switch element is a P-type undoped semiconductor material layer, wherein the active layer has a low trap density, the turn-off voltage>the common voltage>the turn-on voltage.