Image-based touchscreen
US5936615A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1996 |
| Grant date | Aug 10, 1999 |
| Priority date | — |
| Expiry date | Sep 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0428
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a touch activated computer system, a display terminal displays an image on a screen of the terminal. The image includes one or more visual option buttons arranged in a predetermined pattern. Each button corresponds to a specific application program which can be executed by the system. A camera has a lens oriented to capture frames representing a scene in front of the screen. Each frame includes a plurality of regularized pixel values. The system includes an image registration subsystem for comparing the pixel values of successive frames. A particular application is selected for execution when the pixel values corresponding to that portion of the scene directly in front of a particular button differ in successive frames more than a predetermined threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.