DISPLAY SUBSTRATE, PREPARATION METHOD THEREFOR, AND DISPLAY DEVICE

WIPO Patent Application WO/2022/198650

A1

A display substrate, a preparation method therefor, and a display device. The display substrate comprises a base substrate (101) and has a display region (AA), an encapsulation region (F) and an electrode opening region (H); the display region (AA) comprises a pixel driving circuit layer (D), a first planarization layer (1016), a first electrode layer (EM1), a pixel definition layer (102), a spacer layer (103), a light emitting layer (EM2) and a second electrode layer (EM3) which are disposed on the base substrate (101); the electrode opening region (H) comprises a second planarization layer (203), a third electrode layer (201) and a spacing insulating layer (202) which are disposed on the base substrate (101); the third electrode layer (201) comprises a plurality of electrode openings (2011) separated from one another, the spacing insulating layer (202) comprises a plurality of insulating patterns (2021) separated from one another, any insulating pattern (2021) fills one corresponding electrode opening (2011), and the orthographic projection of any insulating pattern (2021) on the base substrate (101) covers the orthographic projection of the corresponding electrode opening (2011) on the base substrate (101); and the maximum distance between the side of the spacing insulating layer (202) distant from the base substrate (101) and the base substrate (101) is a first distance (L1), the maximum distance between the side of the spacer layer (103) distant from the base substrate (101) and the base substrate (101) is a second distance (L2), and the ratio of the first distance (L1) to the second distance (L2) is 0.9 to 1.1.

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WEI FENG (CN)
ZHOU HONGJUN (CN)
DU LILI (CN)

PCT/CN2021/083330

September 29, 2022

March 26, 2021

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BOE TECHNOLOGY GROUP CO LTD (CN)
CHENGDU BOE OPTOELECT TECH CO (CN)

H01L27/32; H01L21/77; H01L51/56

CN109148522A	2019-01-04
CN109728194A	2019-05-07
CN111276636A	2020-06-12
CN111628105A	2020-09-04
JP2011216388A	2011-10-27

LIU, SHEN & ASSOCIATES (CN)

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