Projection image display apparatus having a noise removal filter portion
US8104902B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Apr 4, 2008 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | Mar 29, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In a projection image display apparatus, a noise removal filter portion 15 is separated from a power source unit body 14. The separated noise removal filter portion 15 is provided in the vicinity of a side wall of a housing on which a power source inlet is provided, and of the power source unit body 14, respectively. Specifically, the power source unit body 14 is provided along a side wall of a front face of the horizontally-long housing of the projection image display apparatus and the noise removal filter portion 15 is provided in a position opposed to the power source unit body 14 in a side wall of the back face. As a result, even when a light source lamp has a higher output, the projection image display apparatus can achieve reduced noise by an improved cooling capability and reduced cost enabled by an efficient Electro Magnetic Compatibility (EMC) measure and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.