Display optical unit and display apparatus
US6334686B1 · kind B1 · utility
41Cited by
2References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Sep 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3141
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display optical unit and apparatus in which the optical axis of a projection lens is shifted from the optical axis of an illumination unit and light splitter. The projection lens is attachable and detachable in a direction in which the optical axes are shifted from each other. A light valve or a polarizer is cooled by cooling winds blown by a cooling device to the light valve or polarizer through a plurality of wind supply openings are arranged in directions different from one another and within the range of 45 degrees to 315 degrees so as to enable cooling of the display optical unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.