Touch point positioning and detecting circuit for a touch panel, touch panel and display device
US9323408B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 8, 2013 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Apr 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/042
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch point positioning and detecting circuit for a touch panel and a touch panel with a display device to achieve an optical type in-cell touch panel. The touch point positioning and detecting circuit comprises a touch sensing sub-circuit, a detecting sub-circuit which is connected with the touch sensing sub-circuit, a first touch driving electrode line and a second touch driving electrode line. The touch sensing sub-circuit comprises a capacitor, a first switch transistor and a second switch transistor. A gate and a source of the first switch transistor are connected with the first touch driving electrode line, and a drain of the first switch transistor is connected with a drain of the second switch transistor. A source of the second switch transistor is connected with the detecting sub-circuit, and a gate of the second switch transistor is connected with the second touch driving electrode line. One end of the capacitor is connected with the drain of the first switch transistor and the other end of the capacitor is connected with an electrode line providing a high level voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.