Display unit
US6450646B1 · kind B1 · utility
13Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Mar 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/10
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a display unit wherein an optical block is disposed inside of a housing having a screen at its front, and an image light from the optical block is projected on the screen,a display unit in which the housing is made a closed structure and a path is provided for circulating air between the housing and the optical block so that dust is prevented from entering inside of an apparatus and attaching to optical parts, and at the same time, heat generated in the apparatus can be sufficiently cooled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.