US 11,687,190 B2
Multitouch touch device employing capacitive detection
Laurent Chadirac, Moissy-Cramayel (FR)
Assigned to SAFRAN ELECTRONICS & DEFENSE COCKPIT SOLUTIONS, Montreuil (FR)
Appl. No. 17/276,868
Filed by SAFRAN ELECTRONICS & DEFENSE COCKPIT SOLUTIONS, Montreuil (FR)
PCT Filed Sep. 17, 2019, PCT No. PCT/EP2019/074837
§ 371(c)(1), (2) Date Mar. 17, 2021,
PCT Pub. No. WO2020/058254, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 1858360 (FR), filed on Sep. 17, 2018.
Prior Publication US 2021/0373735 A1, Dec. 2, 2021
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/044 (2013.01); G06F 3/04186 (2019.05); G06F 2203/04104 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A multitouch touch device (DIS) employing capacitive detection comprising:
a touch matrix array;
a first voltage generator configured to generate for each row and each column of said matrix array, a first input voltage having a first frequency leading to the generation of a first output voltage, a second voltage generator configured to generate, for each intersection between at least two rows and two columns of said matrix array a second input voltage having a second frequency different from said first frequency leading to the generation of a second output voltage; and
a processing circuit configured to determine, depending on first and second reference values, whether said first and second output voltages are representative of a press and of its position.