US 12,464,896 B2
Display panel with storage capacitor having different carrier mobility regions and display device
Qian Wu, Beijing (CN); Longfei Fan, Beijing (CN); Pengcheng Lu, Beijing (CN); and Xiaochuan Chen, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 17/628,671
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Feb. 23, 2021, PCT No. PCT/CN2021/077488
§ 371(c)(1), (2) Date Jan. 20, 2022,
PCT Pub. No. WO2022/178670, PCT Pub. Date Sep. 1, 2022.
Prior Publication US 2022/0344428 A1, Oct. 27, 2022
Int. Cl. H10K 59/121 (2023.01); H10K 59/131 (2023.01)
CPC H10K 59/1216 (2023.02) [H10K 59/1213 (2023.02); H10K 59/131 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A display panel, comprising:
a base substrate and a sub-pixel on the base substrate, wherein the sub-pixel comprises a pixel circuit and a light emitting element, the pixel circuit comprises a data writing sub-circuit, a storage sub-circuit and a driving sub-circuit;
wherein the data writing sub-circuit is configured to transmit a data signal to the storage sub-circuit in response to a control signal;
wherein the driving sub-circuit comprises a control electrode, a first electrode and a second electrode, the control electrode of the driving sub-circuit is coupled to the storage sub-circuit, the first electrode of the driving sub-circuit is configured to receive a first power source voltage, the second electrode of the driving sub-circuit is coupled to a first electrode of the light emitting element, and the driving sub-circuit is configured to drive the light emitting element to emit light in response to a voltage of the control electrode of the driving sub-circuit;
wherein the storage sub-circuit comprises a storage capacitor, the storage capacitor comprises a first capacitor electrode and a second capacitor electrode opposite to the first capacitor electrode, the first capacitor electrode and the second capacitor electrode are respectively configured as a first terminal of the storage sub-circuit and a second terminal of the storage sub-circuit, the second capacitor electrode is located between the base substrate and the first capacitor electrode, the second capacitor electrode comprises a first region, a second region and a third region that are arranged in a short side direction of the sub-pixel in sequence, a carrier mobility in the second region is different from a carrier mobility in the first region and a carrier mobility in the third region, and an area of the second region is larger than an area of the first region and an area of the third region;
wherein the control electrode of the driving sub-circuit and the first capacitor electrode are disposed in the same layer and are a continuous integral structure; and
wherein the data writing sub-circuit, the storage sub-circuit and the driving sub-circuit are sequentially arranged along a direction parallel to the base substrate and perpendicular to the short side direction of the sub-pixel.