Pattern recognition module and display apparatus

Patent metadata

Field	Value
Publication number	US-12475733-B2
Application number	US-202118705177-A
Country	US
Kind code	B2
Filing date	Oct 29, 2021
Priority date	Oct 29, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

Provided in the present disclosure are a pattern recognition module and a display apparatus. The pattern recognition module includes: a pattern recognition substrate, which includes a base substrate, and a plurality of photosensitive devices arranged in an array and located on one side of the base substrate; and a light constraint layer, which is in direct contact with the side of the pattern recognition substrate that is provided with the plurality of photosensitive devices, and includes at least one diaphragm layer, and a micro-lens layer located on the side of the diaphragm layer that is away from the pattern recognition substrate.

First claim

What is claimed is:

1 . A print recognition module, comprising:
a print recognition substrate, wherein the print recognition substrate comprises a base substrate and a plurality of photosensitive devices arranged in an array on a side of the base substrate; a light restriction layer, arranged in direct contact with a side of the print recognition substrate providing with the plurality of photosensitive devices; wherein the light restriction layer comprises at least one diaphragm layer, and a micro-lens layer on a side of the diaphragm layer facing away from the print recognition substrate; wherein the diaphragm layer comprises light-transmitting holes arranged in an array; orthographic projections of the light-transmitting holes on the base substrate are located in orthographic projections of the photosensitive devices on the base substrate; the micro-lens layer comprises a plurality of micro-lenses arranged at intervals; and orthographic projections of the micro-lenses on the base substrate cover and are larger than the orthographic projections of the light-transmitting holes on the base substrate; wherein the light restriction layer comprises at least two diaphragm layers; the light-transmitting holes in each of the diaphragm layers correspond to each other one-to-one; and orthographic projections of the light-transmitting holes in each of the diaphragm layers on the base substrate are at least partially overlapped with each other; wherein in a direction facing away from the print recognition substrate, the diaphragm layers comprise a first diaphragm layer, a second diaphragm layer and a third diaphragm layer arranged in sequence; the first diaphragm layer comprises first light-transmitting holes arranged in an array, the second diaphragm layer comprises second light-transmitting holes arranged in an array, and the third diaphragm layer comprises third light-transmitting holes arranged in an array; orthographic projections of the second light-transmitting holes on the base substrate cover and are larger than orthographic projections of the first light-transmitting holes on the base substrate; and the orthographic projections of the second light-transmitting holes on the base substrate are located in orthographic projections of the third light-transmitting holes on the base substrate; wherein the micro-lenses are arranged in one-to-one correspondence with the light-transmitting holes, and each micro-lens comprises a convex surface and a flat surface; the convex surface is arranged at a side of the flat surface facing away from the light-transmitting hole; wherein the light restriction layer further comprises a plurality of support layers alternately arranged with the diaphragm layers; the aperture D 1 of the first light-transmitting hole satisfies a following relationship:

D
1

=

[

D
2

/

(

2
⁢

h
s

)

+

h
s

]

*

[

n
x

/

(

n
-
1

)

]

*
tan
⁢

θ

;

wherein, D represents an aperture of the micro-lens, h s represents a height of the micro-lens, n represents a refractive index of the micro-lens, n x represents a refractive index of at least one of the plurality of support layers, and θ represents a light receiving angle.

2 . The print recognition module according to claim 1 , wherein between an orthographic projection of a center of the first light-transmitting hole on the base substrate and an orthographic projection of a center of the second light-transmitting hole corresponding the first light-transmitting hole on the base substrate is provided with a first distance;
between the orthographic projection of the center of the first light-transmitting hole on the base substrate and an orthographic projection of a center of the third light-transmitting hole corresponding the first light-transmitting hole on the base substrate is provided with a second distance; a ratio of the first distance to an aperture of the first light-transmitting hole is greater than or equal to 0 and less than or equal to 20%; and a ratio of the second distance to the aperture of the first light-transmitting hole is greater than or equal to 0 and less than or equal to 20%.

3 . The print recognition module according to claim 1 , wherein an aperture D 2 of the second light-transmitting hole satisfies a following relationship:

D
2

=

k
*

D
1

,

D
2

<

D
3

;

wherein, 1<k<2, D 1 represents an aperture of the first light-transmitting hole, and D 3 represents an aperture of the third light-transmitting hole.

4 . The print recognition module according to claim 1 , wherein the plurality of support layers comprise a first support layer, a second support layer and a third support layer; wherein,
the first support layer is arranged between the first diaphragm layer and the second diaphragm layer; the second support layer is arranged between the second diaphragm layer and the third diaphragm layer; and the third support layer is arranged on a side of the third diaphragm layer facing away from the second diaphragm layer.

5 . The print recognition module according to claim 4 , wherein an aperture D 3 of the third light-transmitting hole satisfies a following relationship:

D
3

=

D
*

(

H
-

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Technology Dev Co Ltd

Inventors

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

Classifications

• G06V40/1318

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• G06F18/00

  Pattern recognition · CPC title

• G06V40/13 Primary

  Sensors therefor · CPC title