Video projector with battery and replaceable lamp unit
US5347324A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1992 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Jun 25, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/765
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention permits easy and safe replacement of a lamp, improves stability of a video projector, and provides a compact and lightweight video projector. A projector driving battery is mounted in a battery mounting section formed in the bottom of a cabinet of a video projector. Therefore, the heavy battery is located in tile bottom of the cabinet. This further stabilizes the video projector. A lamp unit is mounted on a lamp mounting section formed in the back of the cabinet. When the lamp unit is mounted, a power output terminal in the cabinet is connected with a power input terminal of tile lamp unit at the same time. Thereby, when a lamp is replaced, it is unnecessary, unlike conventionally, to open and close a cover or electrically couple the lamp. Specifically, lamps can be changed merely by dismounting and mounting lamp units. Furthermore, a spare lamp unit 20 can be used as a lens cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.