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Patent Searching and Data


Title:
BACKLIGHT MODULE AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/258766
Kind Code:
A1
Abstract:
A backlight module for fingerprint recognition in an LCD screen. The backlight module comprises a light source (221), a light guide plate (220) provided at one side of the light source (221), a reflection sheet (210) provided below the light guide plate (220), an infrared transparent diffusion film (230) provided above the light guide plate (220), and a fingerprint recognition apparatus (103) provided below the infrared transparent diffusion film (230) to recognize a biological fingerprint optical signal, wherein the infrared transparent diffusion film (230) comprises visible light diffusion particles, so that visible light is diffused on the infrared transparent diffusion film (230); and the infrared light is transmitted through the infrared transparent diffusion film (230) without scattering. According to the backlight module, a fingerprint recognition signal can be effectively transmitted through an LCD module and can be accurately collected, thereby implementing an in-screen fingerprint recognition function of an LCD display device.

Inventors:
ZHANG XIAOQI (CN)
YANG YUNQING (CN)
CAI FENGYI (CN)
Application Number:
PCT/CN2019/126119
Publication Date:
December 30, 2020
Filing Date:
December 18, 2019
Export Citation:
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Assignee:
SHENZHEN LONGLI TECH CO LTD (CN)
International Classes:
G02F1/13357; G02B5/20; G06K9/00
Foreign References:
CN110308586A2019-10-08
CN109919103A2019-06-21
CN109313703A2019-02-05
CN106646980A2017-05-10
US20070014127A12007-01-18
CN109828410A2019-05-31
CN201464763U2010-05-12
CN109690372A2019-04-26
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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