Projection display device in which positions of projection...

Details Projection display device in which positions of projection... Projection display device in which positions of projection...

2011-08-09

2011-08-09

Sohn, Seung C (Department: 2878)

Optics: image projectors

Distortion compensation

Reexamination Certificate

active

07993011

ABSTRACT:
A projection lens unit and a projection mirror unit are moved relative to an illumination optical system, between a first position where an image is projected in a shape that is longer along a direction of projection onto a projection plane and a second position where an image is projected in a shape that is longer along a direction perpendicular to the direction of projection onto the projection plane. When the projection lens unit and the projection mirror unit are located in the first position, a vertically long image is projected onto the projection plane (portrait display). In this state, when the projection lens unit and the projection mirror unit are moved to the second position, a horizontally long image is projected onto the projection plane (landscape display).

REFERENCES:
patent: 2006/0007403 (2006-01-01), Berman
patent: 2006/0238718 (2006-10-01), Erickson et al.
patent: 2007/0263176 (2007-11-01), Nozaki et al.
patent: 2008/0218644 (2008-09-01), Matsumoto et al.
patent: 2004-085752 (2004-03-01), None
patent: 2004-258620 (2004-09-01), None

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