US 12,089,474 B2
Texture recognition apparatus and opposite substrate
Lei Wang, Beijing (CN); Xiaoliang Ding, Beijing (CN); Yingming Liu, Beijing (CN); Lei Zhang, Beijing (CN); Peng Jia, Beijing (CN); Shi Shu, Beijing (CN); Yunke Qin, Beijing (CN); and Lin Zhang, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/425,898
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Apr. 27, 2020, PCT No. PCT/CN2020/087170
§ 371(c)(1), (2) Date Jul. 26, 2021,
PCT Pub. No. WO2021/217325, PCT Pub. Date Nov. 4, 2021.
Prior Publication US 2022/0358782 A1, Nov. 10, 2022
Int. Cl. G06V 40/13 (2022.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); H10K 50/86 (2023.01); H10K 59/126 (2023.01); H10K 59/60 (2023.01); H10K 59/35 (2023.01); H10K 59/65 (2023.01)
CPC H10K 59/60 (2023.02) [G06F 3/0412 (2013.01); G06F 3/0443 (2019.05); G06F 3/0446 (2019.05); G06V 40/1318 (2022.01); H10K 50/865 (2023.02); H10K 59/126 (2023.02); G06F 2203/04107 (2013.01); H10K 59/35 (2023.02); H10K 59/65 (2023.02)] 16 Claims
OG exemplary drawing
 
1. A texture recognition apparatus, comprising:
a light source array, comprising a plurality of light sources;
an image sensor array, comprising a plurality of image sensors, wherein the plurality of image sensors are configured to receive light that is emitted from the plurality of light sources and reflected to the plurality of image sensors by a texture for texture image collection, and the plurality of image sensors comprise a first image sensor; and
a light shielding layer, on a light incident side of the image sensor array, wherein an orthographic projection of the light shielding layer on a plane where the light source array is located is between two adjacent light sources of the plurality of light sources, and an orthographic projection of the light shielding layer on a plane where the image sensor array is located at least partially overlaps with the plurality of image sensors,
wherein the light shielding layer has at least one opening, and the at least one opening is configured to allow the light that is emitted from the plurality of light sources and reflected to the plurality of image sensors by the texture to pass through, the at least one opening comprises a first opening, and at least a part of an orthographic projection of the first opening on the plane where the image sensor array is located is on at least one side of the first image sensor or overlaps with the first image sensor,
the first opening is in a shape of a ring that is closed, and at least a part of the orthographic projection of the first opening on the plane where the image sensor array is located surrounds the first image sensor,
the light shielding layer comprises a middle light shielding pattern at a ring center of the ring, and an orthographic projection of the middle light shielding pattern on the plane where the image sensor array is located at least partially overlaps with the first image sensor,
a half width of the middle light shielding pattern is db, a half width of the first image sensor is dp, a width from a center of the middle light shielding pattern to the shielding layer adjacent to the middle light shielding pattern is dB, and a distance from the shielding layer to the image sensor array is h, and
db=½h*tan θc,
dB=h*tan θm+dp,
in which θc represents a minimum critical angle of a light path for texture recognition, and θm represents a maximum critical angle of the light path for texture recognition.