Projection distance adjustable projection display apparatus

Details Projection distance adjustable projection display apparatus Projection distance adjustable projection display apparatus

2011-01-04

2011-01-04

Sohn, Seung C (Department: 2878)

Optics: image projectors

Lens support

Lens position adjustable

C353S087000, C353S098000

Reexamination Certificate

active

07862184

ABSTRACT:
A projection display apparatus is provided with a projection distance adjustment mechanism for adjusting a distance between a projection plane and an emitting position of projection light, and provided with a focus adjustment mechanism for making a focus adjustment of a projection image with respect to the projection plane. The focus adjustment mechanism is driven such that a projection image is properly focused onto the projection plane in accordance with the distance between the projection plane and the emitting position.

REFERENCES:
patent: 2006/0139582 (2006-06-01), Saito
patent: 2006/0203211 (2006-09-01), Kim
patent: 2007/0108028 (2007-05-01), Lu
patent: 2007/0247599 (2007-10-01), Kadowaki et al.
patent: 08-292496 (1996-11-01), None

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