US 11,769,344 B2
Pattern identification device and display apparatus
Pinchao Gu, Beijing (CN); Haisheng Wang, Beijing (CN); Chunwei Wu, Beijing (CN); Yingming Liu, Beijing (CN); Rui Xu, Beijing (CN); Changfeng Li, Beijing (CN); Lijun Zhao, Beijing (CN); Yanan Jia, Beijing (CN); Yuzhen Guo, Beijing (CN); and Yunke Qin, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed by BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Filed on May 27, 2022, as Appl. No. 17/804,474.
Application 17/804,474 is a continuation of application No. 16/343,768, granted, now 11,373,386, previously published as PCT/CN2018/100270, filed on Aug. 13, 2018.
Claims priority of application No. 201810090793.9 (CN), filed on Jan. 30, 2018.
Prior Publication US 2022/0292798 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06V 10/147 (2022.01); H01L 27/32 (2006.01); G06V 10/145 (2022.01); G06V 40/13 (2022.01); H10K 59/65 (2023.01); G06V 40/16 (2022.01)
CPC G06V 40/1318 (2022.01) [H10K 59/65 (2023.02); G06V 40/16 (2022.01)] 17 Claims
OG exemplary drawing
 
1. A pattern identification device for identifying a pattern over a first surface thereof, comprising:
a photosensitive layer comprising a plurality of photosensitive elements, each configured to convert a light shedding thereon into an electrical signal; and
a light-guiding layer disposed between the photosensitive layer and the first surface;
wherein:
the light-guiding layer comprises a plurality of light-guiding units, each positionally corresponding to one of the plurality of photosensitive elements, wherein:
each of the plurality of light-guiding units comprises a plurality of light-transmitting portions, each configured to guide a light beam reflected from a feature of the pattern positionally corresponding thereto to transmit therethrough and reach one of the plurality of photosensitive elements corresponding to the each of the plurality of light-guiding units;
each of the plurality of light-transmitting portions comprises a through-hole surrounded by at least one light-shielding portion;
an angle of the light beam transmitting through the each of the plurality of light-transmitting portions and reaching the one of the plurality of photosensitive elements corresponding to the each of the plurality of light-guiding units relative to a plane substantially perpendicular to the through-hole is within a range of 88.8°-90°;
the pattern identification device further comprises a transparent cover, disposed between the light-guiding layer and the first surface;
a cross-sectional shape of the through-hole in the each of the plurality of light-transmitting portions in a plane parallel to the transparent cover is circular;
a diameter of the circular cross-section of the through-hole in the each of the plurality of light-transmitting portions is denoted by d;
a minimum distance between central points of two adjacent through-holes corresponding to different photosensitive elements is denoted by L1;
a distance between the surface of the transparent cover opposing to the photosensitive layer and a surface of the light-guiding layer facing the transparent cover is denoted by a;
a thickness of the light-guiding layer is denoted by h; and

OG Complex Work Unit Math