US 11,934,598 B2
Displacement detection circuit and method thereof
Jérôme Saby, Colombier (CH); and Lorenzo Pierobon, Neuchâtel (CH)
Assigned to EM MICROELECTRONIC-MARIN SA, Marin (CH)
Filed by EM MICROELECTRONIC-MARIN SA, Marin (CH)
Filed on Dec. 21, 2022, as Appl. No. 18/069,581.
Claims priority of application No. 21218215 (EP), filed on Dec. 29, 2021.
Prior Publication US 2023/0205332 A1, Jun. 29, 2023
Int. Cl. G06F 3/038 (2013.01); G06F 3/03 (2006.01); H04N 25/75 (2023.01)
CPC G06F 3/0383 (2013.01) [G06F 3/0317 (2013.01); G06F 3/0325 (2013.01); H04N 25/75 (2023.01)] 10 Claims
OG exemplary drawing
 
1. A displacement detection method for a pixel array of a pointing device configured to be displaced on and/or from a surface in at least one direction; said pixel array comprising a first column, a second column and a third column; said displacement detection method comprising:
a main calculation of a main average, said main average corresponding to the average of said pixel array;
an auxiliary calculation of an auxiliary average, said auxiliary average corresponding to the average of one column among said first column, said second column and said third column;
a comparison of said auxiliary average with said main average; and
a motion detection in said at least one direction of the displacement of the pointing device.