US 12,322,308 B2
Gate drive circuit and display device
Zhihua Li, Guangdong (CN)
Assigned to Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangzhou (CN)
Filed by Guangzhou China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong (CN)
Filed on Oct. 28, 2023, as Appl. No. 18/496,848.
Claims priority of application No. 202211736928.7 (CN), filed on Dec. 30, 2022.
Prior Publication US 2024/0221557 A1, Jul. 4, 2024
Int. Cl. G09G 3/00 (2006.01); G11C 19/28 (2006.01)
CPC G09G 3/006 (2013.01) [G11C 19/287 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0286 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A gate drive circuit, comprising:
multiple cascaded shift registers, wherein each of the shift registers comprises a scan output terminal and a pull-down module; in each of the shift registers, the scan output terminal is electrically connected to a scan signal line, and the pull-down module is configured to transmit a voltage of a power node to the scan output terminal when the pull-down module is turned on;
wherein in each of the shift registers located in odd-numbered rows, the power node is electrically connected to a first detection signal line, while in each of the shift registers located in even-numbered rows, the power node is electrically connected to a second detection signal line;
when the gate drive circuit is in a driving state, the first detection signal line and the second detection signal line are configured to transmit a first voltage to the corresponding scan signal lines when the respective pull-down modules are turned on; when the gate drive circuit is in a detection state, the pull-down modules are turned on, and the first detection signal line and the second detection signal line transmit a second voltage to the corresponding scan signal lines; the second voltage is greater than the first voltage; and if it is detected that a resistance between the first detection signal line and the second detection signal line is lower than in the driving state, it is determined that a short circuit occurs in the gate drive circuit.