Texture recognition assembly, manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-12364141-B2
Application number	US-202017621061-A
Country	US
Kind code	B2
Filing date	Nov 30, 2020
Priority date	Nov 30, 2020
Publication date	Jul 15, 2025
Grant date	Jul 15, 2025

Abstract

A texture recognition assembly (100) includes: a substrate (1); an optical sensing structure (2) on the substrate; and a light path structure (3) on a side of the optical sensing structure distal to the substrate and including an inclined light transmitting channel (Q) such that light incident on the light path structure can only pass through the light transmitting channel. The light path structure includes at least two light shielding layers (31, 31a, 31b, 31c) and a light transmitting layer (32, 32a, 32b) located between any adjacent two of the at least two light shielding layers, the light shielding layer (31a) closest to the optical sensing structure includes a first light transmitting hole (311a), the light shielding layer (31b) farthest away from the optical sensing structure includes a second light transmitting hole (322b), the first light transmitting hole and the second light transmitting hole define the light transmitting channel.

First claim

What is claimed is:

1. A texture recognition assembly, comprising a texture recognition region and a peripheral region at a periphery of the texture recognition region, the peripheral region having therein a binding region, and the texture recognition assembly further comprising:
a substrate;
an optical sensing structure on the substrate and in the texture recognition region; and
a light path structure, which is on a side of the optical sensing structure distal to the substrate, at least in the texture recognition region and does not cover the binding region, and comprises a plurality of light transmitting channels such that light incident on the light path structure passes through the light path structure only via the light transmitting channels;
wherein the light path structure comprises at least two light shielding layers and a light transmitting layer between any adjacent two of the at least two light shielding layers, the at least two light shielding layers and the light transmitting layer are stacked together, the light shielding layer closest to the optical sensing structure comprises therein first light transmitting holes arranged in an array, the light shielding layer farthest away from the optical sensing structure comprises therein second light transmitting holes in one-to-one correspondence with the first light transmitting holes, a first light transmitting hole and a corresponding second light transmitting hole define a light transmitting channel, and orthogonal projections of the first light transmitting hole and the corresponding second light transmitting hole on the substrate do not overlap each other; and
wherein a connection line between a center of the first light transmitting hole and a center of the corresponding second light transmitting hole forms a central axis of the light transmitting channel, the central axis and a normal of a plane where the substrate is located form an inclination angle θx, and θx is in a range of [40°, 72°].

2. The texture recognition assembly according to claim 1 , wherein a collimation light receiving angle θ of the light path structure satisfies a relationship of θ=arctan (X+d)/H−arctan (X−d)/H, where X is a distance between an orthogonal projection of a center of the first light transmitting hole on the substrate and an orthogonal projection of a center of the corresponding second light transmitting hole on the substrate, d is a diameter of each of the first light transmitting hole and the corresponding second light transmitting hole, and His a distance between the first light transmitting hole and the corresponding second light transmitting hole in a direction perpendicular to the substrate.

3. The texture recognition assembly according to claim 2 , wherein θ is in range of (0°, 60°].

4. The texture recognition assembly according to claim 1 , wherein the light path structure comprises two light shielding layers.

5. The texture recognition assembly according to claim 1 , wherein the light path structure comprises three or more light shielding layers, and the at least two light shielding layers comprise a first light shielding layer closest to the optical sensing structure, a second light shielding layer farthest away from the optical sensing structure, and at least one third light shielding layer between the first light shielding layer and the second light shielding layer; and
each third light shielding layer comprises therein third light transmitting holes in one-to-one correspondence with the first light transmitting holes, and a center of a third light transmitting hole is in the light transmitting channel defined by the first light transmitting hole and the second light transmitting hole which correspond to the third light transmitting hole.

6. The texture recognition assembly according to claim 5 , wherein a period of the first light transmitting holes in the first light shielding layer, a period of the second light transmitting holes in the second light shielding layer, and a period of the third light transmitting holes in each third light shielding layer are equal to each other;
a center of a first light transmitting hole, a center of the second light transmitting hole corresponding to the first light transmitting hole, and a center of the third light transmitting hole corresponding to the first light transmitting hole are on a same straight line, and
wherein the diameter of each first light transmitting hole, the diameter of each second light transmitting hole, and a diameter of each third light transmitting hole are equal to each other; or
wherein the at least one third light shielding layer of the light path structure is two or three third light shielding layers.

7. The texture recognition assembly according to claim 6 , wherein the at least one third light shielding layer of the light path structure is one third light shielding layer; and
wherein the light transmitting layer between the third light shielding layer and the first light shielding layer is a first light transmitting layer, the light transmitting layer between the third light shielding layer and the second light shielding layer is a second light transmitting layer, and a thickness of the first light transmitting layer is greater than a thickness of the second light transmitting layer; or
wherein the light transmitting layer between the third light shielding layer and the first light shielding layer is a first light transmitting layer, and the light transmitting layer between the third light shielding layer and the second light shielding layer is a second light transmitting layer; and the diameter of each first light transmitting hole is in a range of 2 um to 10 um, the period of first light transmitting holes is in a range of 10 um to 100 um, a thickness of the first light transmitting layer is in a range of 10 um to 20 um, and a thickness of the second light transmitting layer is in a range of 5 um to 15 um.

8. The texture recognition assembly according to claim 1 , wherein the texture recognition region comprises a photosensitive region, a spacer region, and a light shielding region, the spacer region is between the photosensitive region and the light shielding region;
the optical sensing structure is in the photosensitive region and the light shielding region, and has no pattern in the spacer region;
an orthogonal projection of at least one of the at least two light shielding layers on the substrate completely covers the light shielding region; and
wherein the light shielding region is on one side or two opposite sides or two intersecting sides of the photosensitive region.

9. The texture recognition assembly according to claim 1 , wherein the light transmitting layer comprises a transparent resin layer and a transparent inorganic insulating layer;
between any adjacent two light shielding layers, the transparent resin layer is adjacent to the light shielding layer proximal to the substrate, and the transparent inorganic insulating layer is adjacent to the light shielding layer distal to the substrate;
wherein the light shielding layers extend from the texture recognition region to a joint edge of the peripheral region; an orthogonal projection of the transparent resin layer on the substrate completely covers an orthogonal projection of an adjacent light shielding layer on the substrate; and an orthogonal projection of the transparent inorganic insulating layer on the substrate completely covers and is larger than an orthogonal projection of an adjacent transparent resin layer on the substrate; and
wherein the light path structure further comprises a blocking wall structure, which surrounds the transparent resin layer, in a layer where the light shielding layer adjacent to the transparent resin layer is loc

Assignees

• Boe Technology Group Co Ltd

Inventors

• Hai Xiaoquan
• Ma Sen
• Ling Qiuyu
• Wang Lei
• Wang Yingzi

Classifications

• H10K59/90

  Assemblies of multiple devices comprising at least one organic light-emitting element · CPC title

• H10K59/8792

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

• H10K59/875

  Arrangements for extracting light from the devices · CPC title

• H10K59/80

  Constructional details · CPC title

• H10K71/50

  Forming devices by joining two substrates together, e.g. lamination techniques · CPC title