Video projector with battery and replaceable lamp unit

Details Video projector with battery and replaceable lamp unit Video projector with battery and replaceable lamp unit

1992-06-25

1994-09-13

Powell, Mark R.

Television

Video display

Projection device

353 74, 353 77, 353 87, 353119, H04N 574, H04N 564

Patent

active

053473248

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.

REFERENCES:
patent: 3761170 (1973-09-01), Genesky et al.
patent: 4875064 (1989-10-01), Umeda et al.
patent: 4925295 (1990-05-01), Ogawa et al.
patent: 4976429 (1990-12-01), Nagel
patent: 5090800 (1992-02-01), Ushiro
patent: 5170196 (1992-12-01), Itoh
patent: 5258844 (1993-11-01), Nakayama et al.
patent: 5287132 (1994-02-01), Suzuki et al.

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