Automated capacitive touch scan
US8497690B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2009 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Mar 27, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960715
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A scan module of an electronic device scans a capacitive keypad for detection of the actuation of any capacitive touch sensor. This scan module remains in operation even when major power consuming circuits of the electronic device are in a sleep mode, and will not wake up the major power consuming circuits until an action requiring the circuits is needed, thereby, reducing overall power consumption of the electronic device while still maintaining scanning of the capacitive keypad. Upon detection of a valid key press of a capacitive touch sensor, an interrupt to the electronic device brings it out of a sleep mode and into an operating mode for further processing and appropriate action commensurate with the actuation of the specific capacitive touch sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.