US 11,990,081 B2
Gate drive circuit, gate driving method and display device
Xueyong Huang, Sichuan (CN); and Haoxuan Zheng, Sichuan (CN)
Assigned to MIANYANG HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and HKC CORPORATION LIMITED, Shenzhen (CN)
Filed by MIANYANG HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and HKC CORPORATION LIMITED, Shenzhen (CN)
Filed on Dec. 22, 2022, as Appl. No. 18/145,432.
Claims priority of application No. 202210735769.2 (CN), filed on Jun. 27, 2022.
Prior Publication US 2023/0419874 A1, Dec. 28, 2023
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2092 (2013.01) [G09G 2300/0842 (2013.01); G09G 2310/0267 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A gate drive circuit comprising:
a charging circuit comprising a first switch unit, a second switch unit and an energy storage element, wherein a first terminal of the first switch unit and a first terminal of the energy storage element are connected to a first node, a first terminal of the second switch unit and a second terminal of the energy storage element are connected to a second node, wherein a second terminal of the first switch unit is connected to a voltage supply terminal, a second terminal of the second switch unit is grounded, and the energy storage element switches between a charging state and a discharging state based on a control signal responded by a control terminal of the first switch unit and a control terminal of the second switch unit;
a first shutdown circuit and a second shutdown circuit, wherein input terminals of the first shutdown circuit and the second shutdown circuit being are connected to the first node, and output terminals of the first shutdown circuit and the second shutdown circuit being are connected to a sub-pixel; wherein the control terminal of the first shutdown circuit responds to a first shutdown control signal when the energy storage element is in a discharging state, so that the output terminal of the first shutdown circuit outputs a first shutdown signal to the sub-pixel; and wherein the control terminal of the second shutdown circuit responds to a second shutdown control signal when the energy storage element is in the discharging state, so that the output terminal of the second shutdown circuit outputs a second shutdown signal to the sub-pixel, wherein the first shutdown control signal and the second shutdown control signal are sequentially output, and the first shutdown signal and the second shutdown signal have different magnitudes; and
a first startup circuit and a second startup circuit, wherein input terminals of the first startup circuit and the second startup circuit are connected to the second node, and output terminals of the first startup circuit and the second startup circuit are connected to the sub-pixel; wherein a control terminal of the first startup circuit responds to a first startup control signal when the energy storage element is in the discharging state, so that the output terminal of the first startup circuit outputs a first startup signal to the sub-pixel; and wherein a control terminal of the second startup circuit responds to a second startup control signal when the energy storage element is in the discharging state, so that the output terminal of the second startup circuit outputs a second startup signal to the sub-pixel, wherein the first startup control signal and the second startup control signal are sequentially output, and the first startup signal and the second startup signal have different magnitudes;
wherein the charging circuit further comprises a charging capacitor having a first terminal connected to the voltage supply terminal and a second terminal being grounded;
wherein when the energy storage element is in the charging state and the discharging state, the control terminal of the second switch unit is turned on in response to the second switch startup signal;
wherein when the energy storage element is in the charging state, the control terminal of the first switch unit is turned on in response to the first switch startup signal; and
wherein when the energy storage element is in the discharging state, the control terminal of the first switch unit is turned off in response to the first switch shutdown signal.