US 12,474,805 B1
Sensing touchpad
Chi-Chieh Liao, Hsin-Chu (TW)
Assigned to PIXART IMAGING INC., Hsin-Chu (TW)
Filed by PIXART IMAGING INC., Hsin-Chu (TW)
Filed on Aug. 12, 2024, as Appl. No. 18/800,204.
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/0445 (2019.05) [G06F 3/04164 (2019.05); G06F 3/0446 (2019.05); G06F 2203/04107 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A sensing touchpad, comprising:
a substrate having a first surface and a second surface opposite to each other;
a plurality of first driving electrodes arranged in a first layer on the top surface of the substrate;
a plurality of sensing electrodes arranged in a second layer on the first layer;
at least one second driving electrode arranged in the second layer; and
at least one ground element arranged in the first layer, wherein the at least one ground element overlaps with the at least one second driving electrode on a normal direction of the substrate.