Compact projection system and associated device
US6637896B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Oct 31, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/30
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A compact real-image projection apparatus is used for a portable device (140). An optical projector (110) emits light that is capable of forming an image. A collapsible screen (120) has a collapsed surface area no larger than substantially the surface area of a side of the portable device and an expanded surface area capable of receiving the light emitted from the optical projector (110). A retractable connecting member (150) is coupled between the screen (120) and the optical projector (110) and has at least a stowed position and an extended position. The extended position is configured to hold the screen (120) and the optical projector (110) relative to one another such that the light emitted from the optical projector forms a real image on the screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.