US 11,983,953 B2
In-display fingerprint sensing system
John Hong, San Diego, CA (US); and Bing Wen, San Diego, CA (US)
Assigned to Obsidian Sensors, Inc., San Diego, CA (US)
Appl. No. 17/763,591
Filed by Obsidian Sensors, Inc., San Diego, CA (US)
PCT Filed Sep. 23, 2020, PCT No. PCT/US2020/052303
§ 371(c)(1), (2) Date Mar. 24, 2022,
PCT Pub. No. WO2021/061839, PCT Pub. Date Apr. 1, 2021.
Claims priority of provisional application 62/905,213, filed on Sep. 24, 2019.
Prior Publication US 2023/0343130 A1, Oct. 26, 2023
Int. Cl. G06F 3/044 (2006.01); G06F 3/041 (2006.01); G06V 40/13 (2022.01)
CPC G06V 40/1318 (2022.01) [G06F 3/041 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method, comprising:
at an electronic device comprising a display, the display comprising a light source and a detector, wherein the electronic device displays content on the display by illuminating the display with the light source:
detecting, with the display, a user interaction with the display;
determining a position of the user interaction on the display;
in response to determining the position of the user interaction: illuminating, with the light source, the position on the display;
detecting, with the detector, a backscattered light from the position;
processing, based on the detected backscattered light, an image of the user interaction; and
identifying, based on the image, a fingerprint of the user interaction
wherein:
the display comprises a plurality of light sources and detectors,
the light sources and the detectors have same pitch widths,
the plurality of light sources includes the light source,
the plurality of detectors includes the detector, and
the light source is located at a half pitch width from the detector.