Touch control arrangement for data entry
US4495485A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1983 |
| Grant date | Jan 22, 1985 |
| Priority date | — |
| Expiry date | Aug 31, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2017/9615
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A touch control arrangement which employs a touch panel comprising a plurality of touch keys and a network of electrically connected capacitive elements; an oscillator which incorporates the network of capacitive elements in its timing circuit; and a microprocessor coupled to the output of the oscillator and operative to control various appliance operating components as determined by the frequency of the oscillator output signal. The keys of the touch panel are operatively coupled to the network of capacitive elements such that actuation of a key or pad by the user changes the equivalent capacitance of the timing circuit causing the oscillator a generate a control signal at the frequency associated with the actuated key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.