Support structure for projector

Details Support structure for projector Support structure for projector

2002-08-21

2004-11-02

Fuller, Rodney (Department: 2851)

Optics: image projectors

Lens support

Lens position adjustable

C353S100000, C353S119000

Reexamination Certificate

active

06811266

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates in general to a support structure for a projector.
2. Description of the Related Art
Referring to
FIG. 1
, a conventional lens sleeve
12
has an end fixed to an optical engine
10
via screws
11
, and other portions extending out from the optical engine
10
like a cantilever beam. In operation, the lens sleeve
12
is rotated to adjust the focus or zoom.
The lens sleeve
12
bends due to its own weight. The above support structure supports the lens sleeve
12
well when the lens sleeve
12
is small, however, a large lens sleeve bends significantly, so that the lenses therein tend to deviate from predetermined positions. Thus, adjusting the focus is difficult. More seriously, the lens sleeve
12
cannot be rotated to adjust the focus and zoom.
SUMMARY OF THE INVENTION
An object of the present invention is to improve the support structure for a projector. The improved support structure prevents the lens sleeve from bending, allowing the lens sleeve to be freely rotated.
The projector of the present invention includes an optical engine, a lens sleeve and a support structure. The lens sleeve has an end connected to the optical engine, like a cantilever beam. The support structure supports the lens sleeve via rollers or pads so that the lens sleeve can be rotated.


REFERENCES:
patent: 5842761 (1998-12-01), Futakami et al.
patent: 6469839 (2002-10-01), Agata
patent: 6547402 (2003-04-01), Masuda
patent: 6565213 (2003-05-01), Yamaguchi et al.
patent: 6626376 (2003-09-01), Rose
patent: 6626658 (2003-09-01), Ito et al.

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