Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2011-08-23
2011-08-23
Pyo, Kevin (Department: 2878)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
C353S098000, C353S101000, C359S649000, C359S813000, C359S823000
Reexamination Certificate
active
08002418
ABSTRACT:
A projection type image display apparatus includes an image display element, a lens group disposed in a direction of propagation of light with respect to the image display element and being formed with a plural number of lenses, a s reflection mirror configured to reflect light emitted from the lens group thereon so as to project the light on a screen, obliquely, and a housing configured to receive the reflection mirror and the lens group therein. The lens group is fixed on a bottom portion of the housing, and a part of the lens group is configured to enable movement of lenses of the lens group.
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Hirata Koji
Hisada Takanori
Yatsu Masahiko
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Pyo Kevin
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