US 12,307,986 B2
Control circuit, control method and displaying device
Honghai Liu, Shenzhen (CN); Yongxin Ruan, Shenzhen (CN); Dewei Yu, Shenzhen (CN); and Haoxuan Zheng, Shenzhen (CN)
Assigned to HKC CORPORATION LIMITED, Shenzhen (CN)
Appl. No. 18/546,231
Filed by HKC CORPORATION LIMITED, Shenzhen (CN)
PCT Filed Dec. 22, 2022, PCT No. PCT/CN2022/140897
§ 371(c)(1), (2) Date Aug. 11, 2023,
PCT Pub. No. WO2023/216602, PCT Pub. Date Nov. 16, 2023.
Claims priority of application No. 202210498041.2 (CN), filed on May 9, 2022.
Prior Publication US 2024/0221689 A1, Jul. 4, 2024
Int. Cl. G09G 3/34 (2006.01)
CPC G09G 3/3406 (2013.01) [G09G 2320/0247 (2013.01); G09G 2320/064 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A control circuit, comprising:
a sampling sub-circuit configured to collect a level signal corresponding to a pulse width modulation signal;
a switching sub-circuit, wherein one end of the switching sub-circuit is connected to the sampling sub-circuit, the other end of the switching sub-circuit is connected to at least one group of signal feedback ends, wherein each of the at least one group of signal feedback ends comprises at least two feedback points, each of the at least two feedback points is configured to be connected to a light emitting element, and the switching sub-circuit is capable of being switched between a first mode and a second mode based on a relationship between the level signal and a preset threshold; and
a working power supply connected to the sampling sub-circuit and the switching sub-circuit and supplying power to the sampling sub-circuit and the switching sub-circuit;
wherein the switching sub-circuit comprises at least one group of constant current source components and at least one group of switch controlling components, and the at least one group of constant current source components, the at least one group of switch controlling components, and the at least one group of signal feedback ends are disposed in one-to-one correspondence,
wherein each of the at least one group of switch controlling components comprises a first switch and a second switch;
wherein each of the at least one group of constant current source components comprises at least two constant current sources, and each of the at least two constant current sources is provided with a power supply end, an input end, and an output end, wherein the input end is connected to the sampling sub-circuit through an input line, the power supply end is connected to the working power supply through a power supply line, and the output end is connected to a feedback point of the at least one group of signal feedback ends through a feedback line;
wherein among a plurality of power supply lines, one power supply line is provided without the first switch, and each remaining of the plurality of power supply lines is provided with the first switch;
wherein among the at least one group of signal feedback ends, each feedback line is connected to each of the at least two feedback points through the second switch;
wherein in the first mode, the first switches are turned on, and the second switches are turned off; and
wherein in the second mode, the first switches are turned off, and the second switches are turned on.