Patent · US Active

Capacitive touch panel with increased scan frequency using dynamic phase compensation

US9552117B2 · kind B2 · utility

1Cited by

3References

20Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

David Johnson · San Francisco, US
Guozhong Shen · Fremont, US
Firooz Massoudi · Palo Alto, US

Key dates

Filing date	Dec 23, 2014
Grant date	Jan 24, 2017
Priority date	—
Expiry date	Mar 6, 2035

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/0446
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A system includes a first group of transmit electrodes configured to be driven from a first side of a capacitive touch panel and a second group of transmit electrodes configured to be driven from a second side of the panel. The system also includes receive electrodes and a controller operatively coupled with the transmit electrodes and the receive electrodes. The controller is operable to dynamically configure the transmit electrodes and the receive electrodes to compensate for phase delays introduced by driving the transmit electrodes from different sides of the panel. A method includes driving a first group of transmit electrodes from a first side of a capacitive touch panel, driving a second group of transmit electrodes from a second side of the panel, and dynamically configuring the transmit electrodes and receive electrodes to compensate for phase delays introduced by driving the transmit electrodes from different sides of the panel.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.