US 12,380,839 B2
Drive circuit of pixel unit, and display panel
Renjie Zhou, Shenzhen (CN); and Haijiang Yuan, Shenzhen (CN)
Assigned to HKC CORPORATION LIMITED, Shenzhen (CN)
Appl. No. 18/725,748
Filed by HKC CORPORATION LIMITED, Shenzhen (CN)
PCT Filed Dec. 21, 2022, PCT No. PCT/CN2022/140822
§ 371(c)(1), (2) Date Jun. 28, 2024,
PCT Pub. No. WO2023/221498, PCT Pub. Date Nov. 23, 2023.
Claims priority of application No. 202210551407.8 (CN), filed on May 18, 2022.
Prior Publication US 2025/0069544 A1, Feb. 27, 2025
Int. Cl. G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2300/0852 (2013.01); G09G 2310/0251 (2013.01); G09G 2320/0252 (2013.01); G09G 2320/045 (2013.01); G09G 2330/02 (2013.01); G09G 2330/04 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A drive circuit of a pixel unit, used for driving a light-emitting unit of the pixel unit, wherein the drive circuit comprises a main control module, a switch module, a triggering module, a pre-charging module, a power supply unit, and a pre-charging power supply unit; the main control module is electrically connected to the switch module and the triggering module respectively, and transmits a line scanning signal to the switch module and the triggering module; the switch module is also electrically connected to the light-emitting unit and the pre-charging module respectively; the triggering module is also electrically connected to the pre-charging module; the pre-charging module is also electrically connected to the power supply unit and the pre-charging power supply unit respectively;
the switch module is configured to control connection and disconnection between the light-emitting unit and the pre-charging module on the basis of the received line scanning signal;
the triggering module is configured to control connection and disconnection between the power supply unit and the pre-charging module, as well as connection and disconnection between the pre-charging power supply unit and the pre-charging module, on the basis of the received line scanning signal when the light-emitting unit and the pre-charging module are disconnected; and
the light-emitting unit is configured to perform, when the light-emitting unit and the pre-charging module are connected, luminescence display under control of a power supply voltage transmitted by the power supply unit through the pre-charging module, and perform luminescence display under control of a pre-charging voltage generated when the pre-charging module is connected to the pre-charging power supply unit;
wherein the pre-charging module comprises a first pre-charging unit and a second pre-charging unit; the first pre-charging unit and the second pre-charging unit each comprise a two-channel switch unit and a charging element; a first input end of the two-channel switch unit corresponding to the first pre-charging unit is electrically connected to a positive power port of the power supply unit, and a second input end of the two-channel switch unit corresponding to the first pre-charging unit is electrically connected to a first port of the pre-charging power supply unit; a first input end of the two-channel switch unit corresponding to the second pre-charging unit is electrically connected to a negative power port of the power supply unit, and a second input end of the two-channel switch unit corresponding to the second pre-charging unit is electrically connected to a second port of the pre-charging power supply unit; a first controlled end and a second controlled end of each two-channel switch unit are electrically connected to an output end of the triggering module; a first output end and a second output end of each two-channel switch unit are electrically connected to one end of the switch module and the corresponding charging element, and the other end of the corresponding charging element is grounded;
the triggering module is configured to generate, when the light-emitting unit and the pre-charging module are disconnected on the basis of the line scanning signal received by the triggering module, a triggering signal controlling the two-channel switch units;
the two-channel switch units are configured to control, on the basis of the triggering signal output by the triggering module, the switch module to be connected to one of the power supply unit and the pre-charging power supply unit;
the charging elements are configured to perform pre-charging on the basis of the pre-charging voltage provided by the pre-charging power supply unit; and
the pre-charging module is configured to control the charging element for pre-charging when the switch module is connected to the pre-charging power supply unit and when the switch module disconnects the pre-charging module from the light-emitting unit, and control the power supply unit to be connected to the light-emitting unit when the switch module connects the pre-charging module to the light-emitting unit.