US 12,293,732 B2
Circuit for eliminating afterimage and display device
Guangzhao Li, Shenzhen (CN); and Sihui Yu, Shenzhen (CN)
Assigned to HKC CORPORATION LIMITED, Shenzhen (CN)
Appl. No. 17/795,974
Filed by HKC CORPORATION LIMITED, Shenzhen (CN)
PCT Filed Dec. 23, 2021, PCT No. PCT/CN2021/140945
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2022/179282, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 202110217416.9 (CN), filed on Feb. 26, 2021.
Prior Publication US 2024/0296805 A1, Sep. 5, 2024
Int. Cl. G09G 3/36 (2006.01); H02M 3/07 (2006.01)
CPC G09G 3/36 (2013.01) [H02M 3/07 (2013.01); G09G 2320/0257 (2013.01); G09G 2330/02 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A circuit for eliminating afterimage, comprising:
an afterimage elimination unit; and
a power supply unit, a first output end and a second output end of the power supply unit being electrically connected to the afterimage elimination unit, respectively; and the afterimage elimination unit is configured to discharge electric charges in a screen by means of a second voltage output from the second output end of the power supply unit, when a first voltage output from the first output end of the power supply unit is lower than a first preset voltage;
wherein the circuit further comprises a discharge unit, a control end of the discharge unit is configured in electric connection with a control unit, and an execution end of the discharge unit is electrically connected to the first output end of the power supply unit, the control unit is configured to output a first control signal when the screen is turned off, and the discharge unit is configured to discharge at the first output end of the power supply unit according to the first control signal to reduce the first voltage; and
wherein the circuit further comprises a charge pump unit, a control end of the charge pump unit is configured in electric connection with the control unit, and an input end of the charge pump unit is configured in electric connection with a third output end of the power supply unit, and an output end of the charge pump unit is electrically connected to the second output end of the power supply unit, and the charge pump unit is configured to boost an oscillation voltage output from the third output end of the power supply unit to a second preset voltage according to the first control signal, and transmit the second preset voltage to the second output end of the power supply unit.