Parallax induced pointing error avoidance method and means for systems
USH716H · kind H · statutory invention registration
7Cited by
0References
6Claims
0Family size
Inventors
Key dates
| Filing date | — |
| Grant date | Dec 5, 1989 |
| Priority date | — |
| Expiry date | — |
Classification
- Technology area (CPC —)General
Abstract
In a system using a touch panel type of overlay on a cathode ray tube screen wherein multiple areas for user selection are presented on the tube screen, erroneous touch selection of displayed areas on the tube because of parallax-induced offset is avoided by assigning a guard band around each display area. The width of the band is designed to correlate to the amount of parallax error associated with the combined tube and overlay touch screen environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.