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Title:
OPTICAL MODULE AND UNDER-SCREEN FINGERPRINT IDENTIFICATION APPARATUS AND TERMINAL
Document Type and Number:
WIPO Patent Application WO/2021/142660
Kind Code:
A1
Abstract:
An optical module (100) and under-screen fingerprint identification apparatus (10) and terminal (1), which belong to the technical field of optics. The optical module (100) comprises an optical sensor (110) and a substrate (120), provided on one side of a photosensitive surface (111) of the optical sensor (110); the substrate (120) has a first surface (121) facing away from the optical sensor (110) and a second surface (122) facing the optical sensor (110); the first surface (121) has multiple micro lenses (1211); the second surface (122) has a light-shielding layer (1221); the light-shielding layer (1221) has multiple light-passing holes (1222), and the light-passing holes (1222) correspond one-to-one to the micro lenses (1211). The maximum diameter of the orthographic projection of each micro lens (1211) on the first surface (121) is less than 20μm, and the aperture of each light-passing holes (1222) is less than 10 μm. The present design can make the light reaching the optical sensor (110) converge by means of the micro lens (1211), and can filter out stray light, and thus the image quality is good. The total thickness of the optical module (100) can reach 0.1 mm, and thus, while ensuring good image quality, the optical module (100) can be made lighter and thinner.

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Inventors:
LI ZONGZHENG (CN)
WU MUYUAN (CN)
SHEN PEIYI (CN)
DING XICHAO (CN)
Application Number:
PCT/CN2020/072234
Publication Date:
July 22, 2021
Filing Date:
January 15, 2020
Export Citation:
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Assignee:
NANCHANG OFILM BIO IDENTIFICATION TECH CO LTD (CN)
International Classes:
G06K9/20; G02B3/00; G02B27/30; H01L27/146
Foreign References:
CN107480579A2017-12-15
CN110473887A2019-11-19
CN110674798A2020-01-10
CN109389023A2019-02-26
JP2016200783A2016-12-01
Attorney, Agent or Firm:
BEIJING HENGBO INTELLECTUAL PROPERTY AGENT LTD. (CN)
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