Invention Grant
- Patent Title: Fingerprint sensing system
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Application No.: US17203725Application Date: 2021-03-16
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Publication No.: US11954937B2Publication Date: 2024-04-09
- Inventor: Chen-Ming Huang
- Applicant: Powerchip Semiconductor Manufacturing Corporation
- Applicant Address: TW Hsinchu
- Assignee: Powerchip Semiconductor Manufacturing Corporation
- Current Assignee: Powerchip Semiconductor Manufacturing Corporation
- Current Assignee Address: TW Hsinchu
- Agency: JCIPRNET
- Priority: TW 0104177 2021.02.04
- Main IPC: G06V40/13
- IPC: G06V40/13 ; G02B3/00 ; G02B5/20 ; H01L27/146

Abstract:
A fingerprint sensing system is configured to receive an illumination beam which is reflected by a finger and then transmitted to the fingerprint sensing system to generate a fingerprint image. The fingerprint sensing system includes a plurality of microlenses, a sensor, a first light filter layer, and a second light filter layer. The microlenses are arranged in an array. The sensor has a plurality of sensing pixels arranged in an array. The first light filter layer is disposed between the microlenses and the sensor and has a plurality of first openings. The second light filter layer is disposed between the first light filter layer and the sensor and has a plurality of second openings. The illumination beam passes through the first openings or the second openings, so that the sensor receives the illumination beam.
Public/Granted literature
- US20220245374A1 FINGERPRINT SENSING SYSTEM Public/Granted day:2022-08-04
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