Image generator having a miniature display device
US6864861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1998 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Jun 4, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133622
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An image generator having an illuminator, a reflective display device (in one embodiment) and a beamsplitter which produces a virtual image of an image created in a light modulating medium on said reflective display device. In one embodiment, the image generator is a miniature image generator for a relatively small, lightweight head-mounted display which provides a magnified virtual image which is viewed by a viewer. The beamsplitter is optically coupled to the reflective display device. The beamsplitter comprises a film having a plurality of layers including at least a first layer which comprises an oriented birefringent material. The beamsplitter has a wide angle of acceptance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.