Television projection system
US4918535A · kind A · utility
13Cited by
9References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 1988 |
| Grant date | Apr 17, 1990 |
| Priority date | — |
| Expiry date | Oct 25, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3141
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TV display, typically derived from a high-intensity miniature cathode ray tube (1) and available on a projection screen (8) thereof is enlarged by an optical lens system and, as enlarged, projected behind a viewing screen (10) via an optical folded system. The specific arrangement of the TV tube (1) and one or more deflection mirrors (3, 4, 5) forming the optical folded system towards the viewing screen (10) permit flat and light-weight construction of the projection system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.