US 12,178,087 B2
Organic light-emitting diode display panel and display device
Kaikai Li, Guangdong (CN); and Jia Tang, Guangdong (CN)
Assigned to SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Guangdong (CN)
Appl. No. 17/623,193
Filed by SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD., Guangdong (CN)
PCT Filed Dec. 21, 2021, PCT No. PCT/CN2021/140166
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2023/108728, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 202111544842.X (CN), filed on Dec. 16, 2021.
Prior Publication US 2024/0049522 A1, Feb. 8, 2024
Int. Cl. H10K 59/124 (2023.01); H10K 59/121 (2023.01); H10K 59/122 (2023.01); H10K 59/126 (2023.01); H10K 59/131 (2023.01)
CPC H10K 59/124 (2023.02) [H10K 59/1213 (2023.02); H10K 59/122 (2023.02); H10K 59/126 (2023.02); H10K 59/131 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An organic light-emitting diode display panel, comprising:
a substrate;
a thin-film transistor device layer disposed on the substrate, and comprising a functional film layer and a thin-film transistor;
a light-emitting device disposed on the thin-film transistor device layer;
a passivation layer disposed on the thin-film transistor device layer;
a planarization layer disposed on the passivation layer;
wherein the functional film layer comprises a level-raised layer and a protruding platform, and the protruding platform is disposed directly above the level-raised layer and comprises a first top surface and a first side wall located on one side of the first top surface;
an auxiliary electrode disposed between the light-emitting device and the substrate and comprising a contact portion and a step portion, the step portion located on the first top surface, and the contact portion located adjacent to the first side wall, wherein the step portion is located at a vertical level higher than a vertical level of the contact portion; and
an undercut channel arranged on the contact portion of the auxiliary electrode, and a first through hole passing through the planarization layer and located above the undercut channel, wherein an orthographic projection of the undercut channel on the substrate and an orthographic projection of the level-raised layer on the substrate are spaced apart from each other;
wherein the planarization layer comprises a first support portion including a groove, the passivation layer comprises a second support portion located in the groove, wherein the first support portion and the second support portion are disposed on the step portion of the auxiliary electrode, respectively, and part of the first support portion and part of the second support portion extend out of the first side wall and are suspended above the undercut channel.