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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10664676 B1

PDFFull Text
Date of Patent:
May. 26, 2020

Filed:

May. 25, 2018

Systems and methods for reducing unwanted reflections in display systems incorporating an under display biometric sensor

Applicant:

Will Semiconductor (Shangha) Co. Ltd., Shanghai, CN;

Inventors:

Bob Lee Mackey, San Jose, CA (US);

Patrick Smith, San Jose, CA (US);

Erik Jonathon Thompson, San Jose, CA (US);

Arash Akhavan Fomani, Saratoga, CA (US);

Marek Mienko, San Jose, CA (US);

Assignee:

Will Semiconductor (Shanghai) Co. Ltd., Shanghai, CN;

Attorney:

Christensen O'Connor Johnson Kindness PLLC

Primary Examiner:

Utpal D Shah

Int. Cl.
CPC ...
G06K 9/00 (2006.01); G02F 1/137 (2006.01); G02B 5/30 (2006.01); H01L 27/32 (2006.01); G01J 1/04 (2006.01); G02F 1/1333 (2006.01); H01L 51/52 (2006.01); G06T 7/73 (2017.01); G02F 1/133 (2006.01); G06K 9/20 (2006.01); G06K 9/42 (2006.01); G06K 9/46 (2006.01); G06T 3/40 (2006.01); H01L 25/16 (2006.01); G02F 1/1368 (2006.01);
U.S. Cl.
CPC ...
G06K 9/00013 (2013.01); G01J 1/0429 (2013.01); G02B 5/3025 (2013.01); G02F 1/137 (2013.01); G02F 1/13318 (2013.01); G02F 1/13338 (2013.01); G06K 9/0004 (2013.01); G06K 9/00026 (2013.01); G06K 9/00087 (2013.01); G06K 9/2054 (2013.01); G06K 9/42 (2013.01); G06K 9/4661 (2013.01); G06T 3/40 (2013.01); G06T 7/74 (2017.01); H01L 25/167 (2013.01); H01L 27/323 (2013.01); H01L 27/3227 (2013.01); H01L 27/3234 (2013.01); H01L 51/5281 (2013.01); G02F 1/1368 (2013.01); G02F 2001/133331 (2013.01); G02F 2201/50 (2013.01); G06T 2207/20221 (2013.01);
Abstract

An optical sensor system includes a display substrate, display pixel circuitry including a plurality of light emitting display elements or pixels disposed over the display substrate, a first circular polarizer disposed over the display substrate and the display pixel circuitry, and a transparent cover sheet disposed over the first circular polarizer. A top surface of the transparent cover sheet provides a sensing surface for an object such as a finger. The optical sensor system also includes a sensor layer disposed below the display substrate, the sensor layer having a plurality of photosensors, and a second circular polarizer disposed between the sensor layer and the display substrate.

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