Touch screen having reduced sensitivity to spurious selections
US5515083A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Feb 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch screen assembly including a molded cover and base is described. A mounting board is sandwiched between the cover and the base and supports a plurality of LEDs and detectors. Cylindrical guides corresponding to each of the LEDs and detectors are formed in the base when the base and cover are attached. The guides at the LEDs limit beam spreading and guides at the detectors prevent off-axis light from being detected. Support pedestals formed in the base, together with the cylindrical guides help align and support the LEDs and detectors to prevent misalignment and problems associated with fatigue. The cover is attached to the base by catch hooks which may be reached without disassembly of the CRT. Access to the mounting board is thereby facilitated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.