Touch panel device
US6768484B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0436
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a touch panel device for detecting a position touched by an object by sensing an attenuation or break of surface acoustic waves, in which IDTs for exciting or receiving surface acoustic waves comprising comb-like electrode fingers aligned along confronting bus electrodes are placed on a peripheral area of a substrate, drawing electrodes connected to the bus electrode positioned closer to the center of the substrate and led out to the peripheral area side of the substrate are provided. Each of the IDT regions segmented by the drawing electrodes is constituted by repetition, and the drawing electrodes are disposed so that impedance in each IDT region becomes equal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.