Sensor pixel and touch panel thereof
US8451233B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 2008 |
| Grant date | May 28, 2013 |
| Priority date | — |
| Expiry date | Dec 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0412
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A sensor pixel and a touch panel using the same are provided herein, wherein the touch panel has m scan lines and n readout lines. The sensor pixel includes a sensing capacitor, a readout transistor, a reset transistor, a base transistor, and a photo transistor. The photo transistor included in the sensor pixel produces a photo leakage current when it is exposed to a light. The light obstruction characteristic of the photo transistor is utilized to detect the locations of the touched sensor pixels. By proper timing control, the present invention not only can be applied to the multi-finger detection, but also is easy to be implemented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.