Projection-lens driving apparatus with a timing belt

Details Projection-lens driving apparatus with a timing belt Projection-lens driving apparatus with a timing belt

1995-09-07

1996-07-16

Dowling, William C.

Optics: image projectors

Lens support

Lens position adjustable

359694, G03B 2100

Patent

active

055371701

ABSTRACT:
The projection-lens driving apparatus having a housing with a top and a bottom faces for use in a 3-beam projector includes an upper plate, an upper projection-lens holder, a pair of cross link, a pair of lower projection-lens holders, a guide bracket, a sliding plate, an upper guide member, a lower guide member, a timing belt, a driving means divided into a first driving means for driving the upper guide member and a second driving means for driving the lower guide member. The upper and the lower projection-lens holders is respectively fitted to the upper and the lower guide members mechanically and physically in such a way that they can be driven integrally using the driving means, thereby allowing the images to coincide on the screen accurately and, above all, simultaneously.

REFERENCES:
patent: 5125733 (1992-06-01), Lee
patent: 5426471 (1995-06-01), Tanaka et al.

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