Achromatic flat-panel display
US6883919B2 · kind B2 · utility
90Cited by
8References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 26, 2001 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jul 27, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S385/901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An achromatic flat-panel projection display comprises a video projector 2a, a condensing lens (26) and a tapered transparent slab spreading the image input from the projector over the area of th slab. To compensate for dispersion in the slab a dispersive prism is used at the input edge of the slab, whose dispersion cancels out the dispersion of the slab. The prism can be a separate part of simply a bevel in the input edge, i.e. the thick end of the slab.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.