US 12,189,905 B2
Behind display proximity sensing
Laurent Nevou, Eindhoven (NL); Jens Geiger, Eindhoven (NL); Ferran Suarez, Eindhoven (NL); and Markus Rossi, Jona (CH)
Assigned to AMS-OSRAM ASIA PACIFIC PTE. LTD., Singapore (SG)
Appl. No. 18/277,164
Filed by ams-OSRAM Asia Pacific Pte. Ltd., Singapore (SG)
PCT Filed Feb. 7, 2022, PCT No. PCT/SG2022/050055
§ 371(c)(1), (2) Date Aug. 14, 2023,
PCT Pub. No. WO2022/173369, PCT Pub. Date Aug. 18, 2022.
Claims priority of provisional application 63/149,448, filed on Feb. 15, 2021.
Prior Publication US 2024/0134483 A1, Apr. 25, 2024
Prior Publication US 2024/0231542 A9, Jul. 11, 2024
Int. Cl. G06F 3/042 (2006.01); G01S 7/481 (2006.01)
CPC G06F 3/0421 (2013.01) [G01S 7/4811 (2013.01); G06F 2203/04101 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An optical device comprising:
a display comprising light-emitting elements and display circuitry configured to control the light-emitting elements;
an optical sensor arranged behind the display, the optical sensor comprising an emitter configured to emit light through the display to an object in front of the display and a receiver configured to receive light reflected from the object back through the display;
wherein an absorption of the display is wavelength dependent and the absorption of the display for light having a first wavelength is 50%, and the emitter is configured to emit light at a second wavelength greater than the first wavelength,
wherein the sensor is configured to determine a proximity of the object, a distance to the object and/or a velocity of the object.
 
16. A method of detecting an object in front of a display, the method comprising:
emitting light through the display to the object, the display including light-emitting elements and display circuitry configured to control the light-emitting elements;
receiving light reflected back from the object and through the display, wherein an absorption of the display is wavelength dependent and the absorption of the display for light having a first wavelength is 50%, and the step of emitting light comprises emitting light having a second wavelength greater than the first wavelength; and
determining a proximity of the object, a distance to the object and/or a velocity of the object.