Lens shift mechanism and projection type video display

Details Lens shift mechanism and projection type video display Lens shift mechanism and projection type video display

2006-06-06

2006-06-06

Dowling, William C. (Department: 2851)

Optics: image projectors

Lens support

Lens position adjustable

C359S703000

Reexamination Certificate

active

07055971

ABSTRACT:
When an attempt to move a projection lens in a horizontal direction (crosswise) in a state where it is positioned on the upper or lower side is made, it can be moved in the horizontal direction (crosswise) up to a certain range. However, a movement restraining convex area in a vertical movable base finally comes into contact with the corner inclined at an angle of 45 degrees in a fixed base. After this contact, movement in a leftward or rightward direction and an upward or downward direction which are limited directions is limited. Even if a dial and a dial are rotated in the limited directions under the limitation of the movement, they are slipped, thereby making it possible to prevent a force from being forcedly applied to a driving mechanism.

REFERENCES:
patent: 5465126 (1995-11-01), Fukuda
patent: 6469839 (2002-10-01), Agata
patent: 2002/0001067 (2002-01-01), Tachibana
patent: 2005/0030492 (2005-02-01), Gishi
patent: 2005/0083585 (2005-04-01), Lin et al.
patent: 9-138377 (1997-05-01), None

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