US 12,443,308 B2
System and method for parallel sensing in a touch sensor
Guozhong Shen, Fremont, CA (US); and Katayoun Goudarzi, San Jose, CA (US)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on Jun. 27, 2024, as Appl. No. 18/756,833.
Claims priority of provisional application 63/510,805, filed on Jun. 28, 2023.
Prior Publication US 2025/0004594 A1, Jan. 2, 2025
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04166 (2019.05) [G06F 3/044 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An input device, comprising:
a plurality of sensor electrodes disposed in a sensing region of the input device; and
a processing system configured to operate a first subset of the plurality of sensor electrodes in a multi-frequency parallel transcapacitive sensing manner to obtain a first capacitive touch profile, wherein operating the first subset of the plurality of sensor electrodes in the multi-frequency parallel transcapacitive sensing manner to obtain the first capacitive touch profile comprises:
operating a first plurality of sensor electrodes of the first subset as transmitter electrodes, including driving the transmitter electrodes with sensing signals of two or more different frequencies;
operating a second plurality of sensor electrodes of the first subset as receiver electrodes, including obtaining resulting signals via the receiver electrodes corresponding to the sensing signals; and
obtaining the first capacitive touch profile based on the obtained resulting signals;
wherein the processing system is further configured to:
obtain low ground mass (LGM) compensation-related information via a first receiver electrode in case that an input object disposed in the sensing region provides a bridging effect from a first transmitter electrode corresponding to a first frequency to the first receiver electrode, wherein a second transmitter electrode corresponding to a second frequency and a second receiver electrode are disposed between the first transmitter electrode and the first receiver electrode; and
perform LGM compensation on the first capacitive touch profile based on the obtained LGM compensation-related information.