Projection-type image display apparatus

Details Projection-type image display apparatus Projection-type image display apparatus

2011-03-22

2011-03-22

Dowling, William C (Department: 2878)

Optics: image projectors

Structurally related projector and screen

C353S070000, C353S098000, C353S046000

Reexamination Certificate

active

07909472

ABSTRACT:
A projection-type image display apparatus includes an image display element, a light source unit, an enlarging projection optical unit, and a display controller portion. The enlarging projection optical unit, includes a projection lens, a group of lenses which are disposed on a same optical axis, sequentially arranged from a side of the image display element and which include at least one lens having a lens surface, and a reflection mirror having a reflection surface which is disposed between the group of lenses and a display portion. The image display element has a display surface larger than a display surface of the display portion, when an entirety of the image display element is enlargedly projected on the display portion through the enlarging projection optical unit; and the display controller portion enables movement of the image on the display surface of the image display element.

REFERENCES:
patent: 7413312 (2008-08-01), Engle et al.
patent: 7670009 (2010-03-01), Hirata et al.
patent: 2008/0074623 (2008-03-01), Odagiri et al.
patent: 2008/0137040 (2008-06-01), Rodriguez et al.
patent: 2009/0015798 (2009-01-01), Unsworth
patent: 04-027912 (1992-01-01), None
patent: 2006-154720 (2006-06-01), None

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