Correcting for ambient light in an optical touch-sensitive device
US8004502B2 · kind B2 · utility
10Cited by
12References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 5, 2007 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Apr 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0418
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The correction of an image for ambient light in an optical touch-sensitive device is disclosed. For example, one disclosed embodiment comprises integrating a first field of pixels in an image data frame for a different duration of ambient light exposure than a second field of pixels in the image data frame. Intensity data is read from the first field of pixels and the second field of pixels, and an ambient light value is determined for one or more pixels in the image data frame from the intensity data. The ambient light value then is used to adjusting one or more pixels of the data frame for ambient light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.