Projection lens apparatus and projection type image display apparatus
US6975460B2 · kind B2 · utility
6Cited by
10References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2003 |
| Grant date | Dec 13, 2005 |
| Priority date | — |
| Expiry date | Oct 11, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B13/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection type image display apparatus having an image display element outputting an image ray, a projection lens apparatus for performing overhead projection of the image ray from the image display element, the projection lens apparatus having a plurality of lens elements, a reflection mirror reflecting the image ray from the projection lens apparatus, and a screen on which the image ray reflected by the reflection mirror is projected. An optical axis of the projection lens apparatus is decentered from a center of the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.