US 12,315,419 B2
Square wave chamfering circuit and display panel
Xuanquan Gao, Guangdong (CN)
Assigned to SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Guangdong (CN)
Appl. No. 17/759,853
Filed by SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Guangdong (CN)
PCT Filed Jun. 29, 2022, PCT No. PCT/CN2022/102381
§ 371(c)(1), (2) Date Jul. 29, 2022,
PCT Pub. No. WO2023/231120, PCT Pub. Date Dec. 7, 2023.
Claims priority of application No. 202210604039.9 (CN), filed on May 30, 2022.
Prior Publication US 2024/0185759 A1, Jun. 6, 2024
Int. Cl. G09G 3/3266 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/2092 (2013.01) [G09G 2300/0842 (2013.01); G09G 2310/0267 (2013.01); G09G 2310/0294 (2013.01); G09G 2310/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A square wave chamfering circuit, comprising:
a first power supply end;
a second power supply end;
a driving circuit, coupled to the first power supply end, a first node, an output node, a first control signal input end, and a second control signal input end, for conducting a signal of the first power supply end to the output node in response to a signal of the first control signal input end, and for conducting the output node and the first node in response to a signal of the second control signal input end; and
a control circuit, coupled to the first node and the second power supply end, for controlling the output node to output a chamfering signal based on a current through a path between the control circuit and the second power supply end,
wherein the control circuit comprises:
a switching circuit, coupled between the first node and a second node;
a current sampling circuit, coupled between the second node and the second power supply end; and
a voltage comparing circuit, coupled to the switching circuit and the second node, for controlling a turned-on state of the switching circuit based on a comparing result between a voltage of the second node and a set threshold voltage, to control the output node to output the chamfering signal.