US 12,143,764 B2
Input detection with electrostatic charge sensors
Federico Rizzardini, Settimo Milanese (IT); Lorenzo Bracco, Chivasso (IT); Andrea Labombarda, Milan (IT); Mauro Bardone, Cava Manara (IT); Stefano Paolo Rivolta, Desio (IT); and Federico Iaccarino, Milan (IT)
Assigned to STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed by STMICROELECTRONICS S.r.l., Agrate Brianza (IT)
Filed on Mar. 3, 2022, as Appl. No. 17/686,322.
Prior Publication US 2023/0283939 A1, Sep. 7, 2023
Int. Cl. H04R 1/10 (2006.01); G06F 3/044 (2006.01); H03K 17/96 (2006.01)
CPC H04R 1/1041 (2013.01) [G06F 3/044 (2013.01); H03K 17/962 (2013.01); H04R 1/1016 (2013.01); H03K 2017/9613 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A device, comprising:
a receiving electrode positioned on a surface of the device and configured to receive electrostatic charge variation;
a ground electrode positioned on the surface of the device and adjacent to the receiving electrode;
an electrostatic charge sensor electrically coupled to the receiving electrode, the electrostatic charge sensor configured to measure the electrostatic charge variation; and
a processor configured to:
detect a touch state based on the measured electrostatic charge variation, the touch state being a state in which a user is touching both of the receiving electrode and the ground electrode;
detect a non-touch state based on the measured electrostatic charge variation, the non-touch state being a state in which the receiving electrode is untouched by the user; and
output the touch state or the non-touch state.