US 11,694,602 B2
Pixel drive circuit and display panel
Ning Cong, Beijing (CN); Ming Yang, Beijing (CN); Han Yue, Beijing (CN); Can Wang, Beijing (CN); Can Zhang, Beijing (CN); Jiao Zhao, Beijing (CN); Minghua Xuan, Beijing (CN); and Xiaochuan Chen, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/40,988
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Apr. 27, 2020, PCT No. PCT/CN2020/087179
§ 371(c)(1), (2) Date Sep. 24, 2020,
PCT Pub. No. WO2020/228524, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 201910403523.3 (CN), filed on May 15, 2019.
Prior Publication US 2022/0383800 A1, Dec. 1, 2022
Int. Cl. G09G 3/32 (2016.01); G09G 3/20 (2006.01)
CPC G09G 3/32 (2013.01) [G09G 3/2007 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/061 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A pixel drive circuit, comprising:
a micro light-emitting diode, a cathode of the micro light-emitting diode being grounded;
a light-emitting control circuit, connected with a anode of the micro light-emitting diode, and configured to control an emission time of the micro light-emitting diode; and
a current control circuit, connected with the light-emitting control circuit, and configured to output a preset current to the light-emitting control circuit to control the micro light-emitting diode to work under a set current density, wherein luminous efficiency of the micro light-emitting diode under the set current density is greater than a set threshold,
wherein the current control circuit comprises:
a first control sub-circuit, a first terminal of the first control sub-circuit being connected with a first power supply terminal, and a second terminal of the first control sub-circuit being connected with the light-emitting control circuit;
a first storage sub-circuit, connected with a third terminal of the first control sub-circuit, and configured to discharge through the first control sub-circuit and control the first control sub-circuit to work at the preset current; and
a first charging sub-circuit, connected with the first storage sub-circuit, and configured to charge the first storage sub-circuit.