US 12,087,215 B2
Display substrate, preparation method thereof, and display device
Peng Huang, Beijing (CN); Zhu Wang, Beijing (CN); Tao Gao, Beijing (CN); and Ling Shi, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/783,657
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jun. 23, 2021, PCT No. PCT/CN2021/101874
§ 371(c)(1), (2) Date Dec. 29, 2022,
PCT Pub. No. WO2022/266892, PCT Pub. Date Dec. 29, 2022.
Prior Publication US 2024/0185773 A1, Jun. 6, 2024
Int. Cl. G09G 3/3208 (2016.01); H10K 59/131 (2023.01)
CPC G09G 3/3208 (2013.01) [H10K 59/131 (2023.02); G09G 2300/0408 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2330/021 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display substrate, comprising a plurality of sub-pixels, wherein at least one sub-pixel comprises a driving circuit layer and a light emitting structure layer disposed on the driving circuit layer; the driving circuit layer comprises a pixel driving circuit, and the light emitting structure layer comprises a light emitting device connected with the pixel driving circuit; the pixel driving circuit comprises a reset sub-circuit, a writing sub-circuit, a driving sub-circuit, a compensation sub-circuit, an energy storage sub-circuit and a light emitting control sub-circuit;
the reset sub-circuit is respectively connected to a second scan signal line, an initial signal line, a first node and a fourth node, and is configured to provide an initial voltage output by the initial signal line to the first node and the fourth node under the control of the second scan signal line;
the writing sub-circuit is respectively connected to a first scan signal line, a data signal line and the second node, and is configured to provide a data voltage output by the data signal line to the second node under the control of the first scan signal line;
the driving sub-circuit is respectively connected with the first node, the second node, and a third node, and is configured to provide a voltage of the second node to the third node under the control of the first node;
the compensation sub-circuit is respectively connected with the first scan signal line, the first node and the third node, and is configured to provide a voltage of the third node to the first node under the control of the first scan signal line to compensate the first node until a voltage of the first node satisfies a threshold condition;
the energy storage sub-circuit is respectively connected with a first power supply line and the first node, and is configured to store a voltage difference between a first power supply voltage output by the first power supply line and the first node;
the light emitting control sub-circuit is respectively connected with a light emitting control line, the first power supply line, the second node, the third node and the fourth node, and is configured to provide a first power supply voltage output by the first power supply line to the second node and a voltage of the third node to the fourth node under the control of the light emitting control line; and
at least one of the reset sub-circuit, the compensation sub-circuit and the writing sub-circuit comprises an oxide transistor and a one-way conductive device.