Vehicle accessory touch switch
US8090497B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 2007 |
| Grant date | Jan 3, 2012 |
| Priority date | — |
| Expiry date | Nov 2, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/96058
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A touch switch for controlling accessory equipment of a vehicle avoids a malfunction which is caused due to an environmental change such as a change in a state of air, arrival of unnecessary electromagnetic waves, or the like. Conductor plates 20-1 to 20-3 are disposed in an arrangement isolated from one another on a surface opposite to a sensor surface 16T of a touch plate 16 which is touched by a person's hand. The conductor plates 20-1 to 20-3 are each connected to a capacity measurement/control unit 34. The capacity measurement/control unit 34 determines as a judgment value D the absolute value of a value obtained by subtracting a minimum absolute value among changes ΔC1 to ΔC3 in electrostatic capacity from a maximum absolute value among the changes ΔC1 to ΔC3 in electrostatic capacity. The capacity measurement/control unit 34 controls a switch 28 according to the judgment value D.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.