Optical equipment
US6280038A · kind A · utility
38Cited by
1References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jul 6, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In optical equipment, such as a liquid crystal projector, a discharge lamp supplies light through a light valve device to project a light beam on a screen. A cooling system is provided to cool the light valve device, including a ventilation device, such as a centrifugal fan, for drawing in air through an air intake opening in the case of the optical equipment and an air flow path for supplying the drawn in air to the light valve device along plural paths. For this purpose, guide members are provided in the air flow path to divide and direct the air flow to individual parts of the light valve device along the plural paths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.