Display device and detection method
US7855779B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 2008 |
| Grant date | Dec 21, 2010 |
| Priority date | — |
| Expiry date | Jul 23, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0412
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display device includes display pixels that display an image on a display screen. First and second optical sensors correspond to one or more of the display pixels and detect the amount of incident light. An optical member allows light coming from a first direction to enter the first optical sensors and light coming from a second direction to enter the second optical sensors. A memory circuit stores a first detection result that is detected in a first time period by means of the first optical sensors and stores a second detection result that is detected in the first time period by means of the second optical sensors. A comparison circuit compares sequential detection results to permit a judgment circuit to determine whether the display screen has been touched with a detection target medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.