Capacitive sensing user interfaces and implementation thereof
US8072356B2 · kind B2 · utility
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13References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 13, 2007 |
| Grant date | Dec 6, 2011 |
| Priority date | — |
| Expiry date | Oct 4, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/960765
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for determining the operating states of a plurality of capacitive sensing buttons in a capacitive sensing user interface are disclosed. The capacitive sensing buttons are sampled in a round-robin fashion such that the decay time samples for the buttons are acquired in an interleaved manner during each sampling cycle. Provisions are made to reduce the initialization delay, to reduce transient-induced errors, and to obtain the operating states based on updated decay data samples for the buttons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.