Picture display apparatus and cooling apparatus for optical apparatus
US6132049A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Sep 11, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A picture display apparatus and a cooling apparatus used for an optical apparatus for efficiently cooling sections to be cooled through the effective use of air currents supplied from a cooling fan, where in external wall and an internal wall of an air guide section guide rotating air currents generated by the cooling fan to intakes without reducing the air velocity by regulating and directing the air currents in accordance with the shape of the cooling fan and the direction of rotation of the fan. The air currents passing through the air guide section are taken through the intakes into an optical unit and sent to the sections to be cooled including a light valve and a polarizing plate for each color. The sections are thus cooled by the air currents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.