US 12,229,355 B2
Sensing device of 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. 18/257,184
Filed by EM Microelectronic-Marin SA, Marin (CH)
PCT Filed Dec. 14, 2021, PCT No. PCT/EP2021/085630
§ 371(c)(1), (2) Date Jun. 13, 2023,
PCT Pub. No. WO2022/129007, PCT Pub. Date Jun. 23, 2022.
Claims priority of application No. 20213895 (EP), filed on Dec. 14, 2020.
Prior Publication US 2024/0045521 A1, Feb. 8, 2024
Int. Cl. G06F 3/038 (2013.01); G06F 3/0354 (2013.01)
CPC G06F 3/038 (2013.01) [G06F 3/03543 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A sensing device of a pointing device, comprising:
at least one light source configured to illuminate a surface;
a ground;
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;
a plurality of storage elements, said plurality of storage elements comprising at least one first secondary storage element, at least one second secondary storage element, and at least one primary storage element; and
a plurality of auxiliary switching elements, wherein
said plurality of photodetectors is configured to measure light reflected by said surface and to store said measured reflected light in said plurality of storage elements, and
said plurality of auxiliary switching elements is configured to connect said plurality of storage elements to said ground.