Filter of photoelectric touch panel with integral spherical protrusion lens
US4737631A · kind A · utility
50Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | May 19, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/943
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A filter of a photoelectric touch panel which is disposed on the front of an array mounted with light emitting elements and/or light receiving elements and disposed around a faceplate in the form of a frame, and characterized in that converging sections are formed on the filter at least at positions corresponding to the individual elements, thereby eliminating preparation of converging lenses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.