Projector having improved structure for cooling optical system
US7083286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2004 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Apr 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/18
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector projecting an image onto a screen, comprises a lamp emitting light; an optical system having an optical synthesizer including a blue panel, a green panel and a red panel, and an optical component disposed along an optical path from the lamp to the optical synthesizer; a cooling fan generating cool air cooling the optical system; and a guiding duct guiding the cool air to be distributed into a first passage and a second passage. With this configuration, the present invention provides a projector in which a guiding duct is partitioned and therefore cool air is distributed according to whether the cool air is sent to a relatively high temperature place or a relatively low temperature place in an optical system, preventing energy from being wasted by efficiently cooling some components of the optical system without overcooling others, and reducing noise caused by a cooling fan and air flow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.