Image display apparatus forming optical image by irradiating light from light source onto image display element
US7410264B2 · kind B2 · utility
10Cited by
2References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2005 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Mar 15, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A technique is provided that improves the usage ratio of light in the illumination optical system of an image display apparatus, in which the cross-sectional size or shape of the flux of light that has formed a light source image of an LED-based light-emitting section is converted by anamorphic optics, such as collimator lens, into a size or shape appropriate for an aperture in the portion that permits the flux of the light source image to pass through, in an optical system leading to an image display element(s), and thus the quantity of fluxes of light passed through the aperture is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.