Display substrate and display apparatus with photoelectric conversion layer

Patent metadata

Field	Value
Publication number	US-12532647-B2
Application number	US-202218022489-A
Country	US
Kind code	B2
Filing date	Apr 11, 2022
Priority date	Apr 11, 2022
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

Provides are a display substrate and a display apparatus. The display substrate includes a base substrate, light-emitting devices and photosensitive devices on the base substrate in an array, orthographic projections of the photosensitive devices overlap orthographic projections of gaps of the light-emitting devices on the base substrate, each photosensitive device includes a photoelectric conversion layer, each photoelectric conversion layer includes at least one photoelectric conversion part; a black matrix on a side, away from the base substrate, of a layer where the light-emitting devices are; an orthographic projection of the black matrix overlaps the orthographic projections of the gaps of the light-emitting devices on the base substrate, the black matrix has openings, orthographic projections of the openings overlap the orthographic projections of the photoelectric conversion parts on the base substrate.

First claim

What is claimed is:

1 . A display substrate, comprising:
a base substrate; a plurality of light-emitting devices arranged on the base substrate in an array; a plurality of photosensitive devices arranged on the base substrate in an array, wherein an orthographic projection of each of the plurality of photosensitive devices on the base substrate overlaps an orthographic projection of each gap between two adjacent light-emitting devices among the plurality of light-emitting devices on the base substrate, the plurality of photosensitive devices comprise a photoelectric conversion layer, the photoelectric conversion layer comprises a plurality of photoelectric conversion parts, and orthographic projections of the plurality of photoelectric conversion parts on the base substrate are same in shape and equal in area; and a black matrix on a side, away from the base substrate, of a layer where the light-emitting devices are, wherein an orthographic projection of the black matrix on the base substrate overlaps the orthographic projection of the each gap between two adjacent light-emitting devices among the plurality of light-emitting devices on the base substrate, the black matrix comprises a plurality of openings, and an orthographic projection of each of the plurality of openings on the base substrate overlaps an orthographic projection of each of the plurality of photoelectric conversion parts on the base substrate; and a collimating light-receiving angle θ in any direction determined by the openings and the photoelectric conversion parts meets a following relation:

0
⁢
°

≤
θ
≤

arctan
⁡
(

P

2
⁢
H

)

;

wherein
P is a valley-ridge size of a fingerprint, and H is a distance between a contact face of the fingerprint and the display substrate and an end face, away from one side of the base substrate, of the openings.

2 . The display substrate according to claim 1 , wherein the plurality of openings correspond to the photoelectric conversion parts in an one-to-one manner, an orthographic projection of each of the photoelectric conversion parts on the base substrate covers an orthographic projection of a corresponding opening on the base substrate, and an orthographic projection of a center of each of the plurality of openings on the base substrate approximately coincide with an orthographic projection of a center of the corresponding photoelectric conversion part on the base substrate.

3 . The display substrate according to claim 1 , wherein in a same direction, a ratio of a size of each of the plurality of openings to a size of each of the photoelectric conversion parts is greater than or equal to 0.8 and less than or equal to 1.

4 . The display substrate according to claim 3 , wherein shapes of orthographic projections of the plurality of openings on the base substrate and shapes of the orthographic projections of the photoelectric conversion parts on the base substrate are rectangles;
a collimating light-receiving angle θ 1 in a long side direction of the rectangles, a collimating light-receiving angle θ 2 in a broadside direction of the rectangles and a collimating light-receiving angle θ 3 in a diagonal direction of the rectangles are determined by the plurality of openings and the photoelectric conversion parts and meet a following relation:

θ
1

=

arctan
⁡
(

d
L

+

D
L

2
⁢
h

)

;

θ
2

=

arctan
⁡
(

d
S

+

D
S

2
⁢
h

)

;

θ
3

=

arctan
⁡
(

d
L
2

+

d
S
2

+

D
L
2

+

D
S
2

2
⁢
h

)

;

wherein
h is a distance between a surface, away from one side of the base substrate, of the photoelectric conversion parts and an end face, away from one side of the base substrate, of the plurality of openings, d L is a length of each of the photoelectric conversion parts, d S is a width of each of the photoelectric conversion parts, D L is a length of each of the plurality of openings, and D S is a width of each of the plurality of openings.

5 . The display substrate according to claim 4 , wherein 1≤d L /d S ≤1.3, and 1≤D L /D S ≤1.3.

6 . The display substrate according to claim 4 , wherein 200 μm≤P≤500 μm, 4 μm≤h≤22 μm, 7 μm≤d L ≤14 μm, 7≤d S ≤18.2 μm, 5.6 μm≤D L ≤14 μm, and 5.6 μm≤D S ≤18.2 μm.

7 . The display substrate according to claim 3 , wherein shapes of the orthographic projections of the plurality of openings on the base substrate and shapes of the orthogra

Assignees

• Boe Technology Group Co Ltd

Inventors

• Hai Xiaoquan
• Wang Yingzi
• Dong Xue
• Chen Xiaochuan

Classifications

• H10K59/65

  OLEDs integrated with inorganic image sensors · CPC title

• H10K59/8792 Primary

  comprising light absorbing layers, e.g. black layers · CPC title