US 11,967,273 B2
Light emitting diode (LED) drive circuit providing over-voltage protection of output voltage feedback terminals
Peiyang Lin, Sichuan (CN); Honghai Liu, Sichuan (CN); Xiaowei Han, Sichuan (CN); and Rongrong Li, 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. 23, 2022, as Appl. No. 18/145,965.
Claims priority of application No. 202210450103.2 (CN), filed on Apr. 27, 2022.
Prior Publication US 2023/0351949 A1, Nov. 2, 2023
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/0819 (2013.01); G09G 2310/0291 (2013.01); G09G 2330/021 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A control circuit, comprising: control sub-circuit
a control sub-circuit;
a detection circuit, connected with a plurality of output voltage feedback terminals of a drive chip, and the detection circuit being connected with the control sub-circuit; and
a voltage regulating circuit, wherein the voltage regulating circuit comprises: a first resistor and a second resistor; a first terminal of the first resistor being connected to an external power supply, a second terminal of the second resistor being grounded, and a second terminal of the first resistor and the first terminal of the second resistor being connected for providing with the second voltage,
wherein the detection circuit is configured for providing a first voltage to the control sub-circuit when a voltage of at least one output voltage feedback terminal in the plurality of output voltage feedback terminals is detected, the first voltage being greater than a second voltage received by the control sub-circuit; and
the control sub-circuit is configured for controlling the drive chip to restart when the first voltage is greater than the second voltage.