Light source device for projection apparatus
US6575599B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V29/83
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a light source unit which has a discharge lamp which is located in a differential pressure passage system, an arrangement in which the discharge lamp and a concave reflector can be cooled with high efficiency is achieved by a discharge lamp being attached in the neck of a concave reflector which is located essentially horizontally, and at the same time, in the differential pressure passage system. Furthermore, at least one cooling air discharge opening is located in the neck area of the concave reflector; translucent glass covers the front opening of the concave reflector; and at least one cooling air injection opening is located in the area of the front opening of the concave reflector and has directional accuracy with reference to the inside of the concave reflector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.