Touch sensing device
US4550310A · kind A · utility
109Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1982 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Oct 28, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/9613
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A new type touch sensing device comprises a touch panel with a plurality of transparent touch electrodes, a LC parallel resonant circuit connected to the touch electrode and an oscillation circuit. The LC resonant circuit has a resonant point on a same frequency with the oscillation frequency of the oscillation circuit. The touch/non-touch condition to the touch electrode is detected as a change of voltage value at the connecting point of the LC resonant circuit and touch electrode with an increased ON-OFF ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.