Portable projector
US5170196A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Nov 29, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A portable projector which can be used at a location where no commercial ac power source is available and can be carried readily, has a battery section for supplying power therefrom, an illuminating section including a lamp for receiving power from the battery section and emitting light therefrom, a picture image holding section for forming a picture image thereon and for being irradiated by light emitted from the irradiating section to pass the light in accordance with the picture image formed thereon, and a lens section for enlarging a picture image of light passing through the picture image holding section. The battery section, illuminating section, picture image holding section and lens section can be removably coupled on a common optical axis to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.