US 12,137,593 B2
Display substrate, preparation method for same, and display device
Tiancheng Yu, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/432,953
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jan. 20, 2021, PCT No. PCT/CN2021/072798
§ 371(c)(1), (2) Date Aug. 23, 2021,
PCT Pub. No. WO2022/155801, PCT Pub. Date Jul. 28, 2022.
Prior Publication US 2023/0135818 A1, May 4, 2023
Int. Cl. H10K 59/35 (2023.01); H10K 59/80 (2023.01); H10K 71/00 (2023.01); H10K 102/00 (2023.01)
CPC H10K 59/353 (2023.02) [H10K 59/873 (2023.02); H10K 59/876 (2023.02); H10K 71/00 (2023.02); H10K 2102/311 (2023.02); H10K 2102/351 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A display substrate, comprising: multiple light-emitting units,
wherein at least one light-emitting unit comprises a first light-emitting device configured to emit light of a first color and a second light-emitting device configured to emit light of a second color;
wherein the display substrate is configured to display the first color in a first view angle range smaller than a first view angle, and display the second color in a second view angle range larger than a second view angle; or, the display substrate is configured to display the second color in the first view angle range smaller than the first view angle, and display the first color in the second view angle range larger than the second view angle;
wherein the first view angle and the second view angle are each an included angle between a line of sight of a viewer and a normal of a viewing region in the display substrate, and the second view angle is larger than the first view angle;
wherein the first color is different from the second color; and the first view angle range is different from the second view angle range;
wherein the display substrate comprises a driving structure layer arranged on a base substrate, a light-emitting structure layer arranged on the driving structure layer, and an encapsulation structure layer arranged on the light-emitting structure layer; and
wherein the light-emitting structure layer comprises an anode, a cathode, and an organic light-emitting layer arranged between the anode and the cathode; in a micro-cavity formed by the anode and the cathode, a first distance between an anode and a cathode in the first light-emitting device, emitting light of the first color, falls within a first micro-cavity length range, and a second distance between an anode and a cathode in the second light-emitting device, emitting light of the second color which is different from the first color, falls within a second micro-cavity length range; a ratio range of the first distance to the second distance falls within a range of 1.24K to 1.63K, or, a ratio of the first distance to the second distance falls within a range of 0.75K to 1.06K; wherein K=λ1/λ2, λ1 is a wavelength of the light of the first color emitted by the first light-emitting device, and λ2 is a wavelength of the light of the second color emitted by the second light-emitting device.