Photoelectric touch panel
US4868550A · kind A · utility
28Cited by
5References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1987 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Dec 30, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A photoelectric touch panel comprising arrays of equally spaced light emitting elements and photosensitive elements disposed in a frame configuration on the circumference of a CRT display screen in which a matrix of infrared beams is formed in front of the screen. The photoelectric touch panel has a light shielding plate formed into a comblike shape disposed such that each comb tooth thereof is interposed between said photosensitive elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.