Touch point detecting circuit, inductive touch screen and touch display device
US9285916B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 1, 2014 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | May 1, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/045
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch point detecting circuit, an inductive touch screen and a touch display device are disclosed. The touch point detecting circuit includes a plurality of mutually inductive units arranged in an array, wherein each mutually inductive unit includes a first coil and a second coil which are mutually coupled inductors, the first coil of each mutually inductive unit in a same row is electrically connected to an identical first signal line, and the second coil of each mutually inductive unit in a same column is electrically connected to an identical second signal line. By adopting the touch point detecting circuit provided in the technical solution, not only may the detection precision be relatively high, but also the positions of touch points may be determined by detecting the mutual inductance change of each mutually inductive unit, so that multi-point touch is realized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.