US 12,147,611 B2
Method for sensing a displacement of a pointing device
Sylvain Grosjean, Les Fins (FR); and Jérémy Schlachter, Gampelen (CH)
Assigned to EM Microelectronic-Marin SA, Marin (CH)
Appl. No. 18/257,175
Filed by EM Microelectronic-Marin SA, Marin (CH)
PCT Filed Dec. 14, 2021, PCT No. PCT/EP2021/085629
§ 371(c)(1), (2) Date Jun. 13, 2023,
PCT Pub. No. WO2022/129006, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 20213897 (EP), filed on Dec. 14, 2020.
Prior Publication US 2024/0036655 A1, Feb. 1, 2024
Int. Cl. G06F 3/03 (2006.01)
CPC G06F 3/0304 (2013.01) 11 Claims
OG exemplary drawing
 
1. A method for sensing a displacement of a pointing device, said pointing device comprising at least one light source configured to illuminate a surface, a plurality of photodetectors, said plurality of photodetectors comprising at least one first secondary photodetector, at least one second secondary photodetector, and at least one primary photodetector, each photodetector including at least one first secondary value, at least one second secondary value, and at least one primary value, respectively, said method comprising at least one:
sensing light reflected by said surface via said plurality of photodetectors;
weighting said at least one first secondary value, said at least one second secondary value, and/or said at least one primary value; and
comparing said at least one weighting, said at least one second secondary value, and/or said at least one primary value.