Projector

Details Projector Projector

2006-08-21

2009-12-22

Lee, Diane I (Department: 2851)

Optics: image projectors

Lens support

Lens position adjustable

C353S069000, C353S100000, C353S119000, C359S813000, C359S814000

Reexamination Certificate

active

07635190

ABSTRACT:
A projector includes a light source, an optical modulation device to form an optical image, a projection optical device, and a projection position adjusting device to adjust the projection position. The projection position adjusting device includes a fixed member, a moving member a dial knob, a drive mechanism that transmit rotation of the dial knob, and a reference position detecting mechanism. The reference position detecting mechanism includes a spiral rail guiding section having a groove shape provided to a side face of the dial knob adjacent to the fixed member, along the rotational direction of the dial knob, a sliding section that slides in the guiding section with the rotation of the dial knob, and an engaging section provided to the guiding section, and engages with the sliding section upon the projection position of the projection optical device reaching the projection reference position.

REFERENCES:
patent: 973962 (1910-10-01), Oliver
patent: 2429164 (1947-10-01), Mast et al.
patent: 2559994 (1951-07-01), Paludan
patent: 6351907 (2002-03-01), Otteman
patent: 7014324 (2006-03-01), Jang
patent: 2005/0024596 (2005-02-01), Kuroda et al.
patent: 2005/0030491 (2005-02-01), Gishi
patent: 2005/0030492 (2005-02-01), Gishi
patent: A-2004-205686 (2004-07-01), None

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