US 12,353,653 B2
Capacitive knob sensing system and method to detect initial states
Kelvin Fong, Milpitas, CA (US); Tomohiro Hirakawa, Chiba (JP); and Yan-Ju Du, Xiamen (CN)
Assigned to Synaptics Incorporated, San Jose, CA (US)
Filed by Synaptics Incorporated, San Jose, CA (US)
Filed on Feb. 5, 2024, as Appl. No. 18/432,565.
Application 18/432,565 is a continuation of application No. 17/821,866, filed on Aug. 24, 2022, granted, now 11,928,271.
Prior Publication US 2024/0176435 A1, May 30, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/0362 (2013.01); B60K 35/10 (2024.01); G06F 3/044 (2006.01)
CPC G06F 3/0362 (2013.01) [B60K 35/10 (2024.01); G06F 3/0446 (2019.05); B60K 2360/126 (2024.01)] 19 Claims
OG exemplary drawing
 
1. A method for determining a rotational direction of a knob interface, comprising:
obtaining, by a processing system associated with an electric system and using a set of rotation electrodes that interact with the knob interface, first resulting signals, wherein the electric system is a control system of a vehicle;
obtaining, by the processing system, second resulting signals;
determining, by the processing system, an initial state of the knob interface during start-up operations for the vehicle using the first resulting signals and the second resulting signals;
obtaining, by the processing system and using the set of rotation electrodes, third resulting signals indicating a first rotational state of the knob interface, based at least in part on the knob interface being rotated from the initial state to the first rotational state;
determining, by the processing system, the rotational direction of the knob interface using the first resulting signals, the second resulting signals, and the third resulting signals; and
adjusting, by the processing system, a setting using the determined rotational direction.