Touch-sensitive momentary contact switch with an evaluation circuit detecting a malfunction in an optical sensor
US8026472B2 · kind B2 · utility
7Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 2009 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Oct 9, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94116
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A touch-sensitive momentary-contact switch has an optical sensor, particularly an infrared sensor, and an evaluation circuit. The evaluation circuit is able to identify a malfunction in the optical sensor, so that the momentary-contact switch can be switched off, for example, for safety reasons. Therefore, it is possible to identify a malfunction in the optical sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.