Optics: image projectors – Distortion compensation – For projection axis inclined to screen
Reexamination Certificate
2011-06-14
2011-06-14
Pyo, Kevin (Department: 2878)
Optics: image projectors
Distortion compensation
For projection axis inclined to screen
C353S069000, C348S746000
Reexamination Certificate
active
07959301
ABSTRACT:
According to one embodiment, a projection display device comprises a light modulator configured to receive light from a light source and emit an optical image modulated based on an image signal, a projector configured to project the optical image emitted from the light modulator onto a screen, and a correction unit configured to correct a distortion of the optical image which is projected onto the screen with an optical axis of the projector being not perpendicular to the screen, wherein the correction unit corrects the optical image which is projected onto the screen so that a shape of the optical image becomes a rectangle and any one of boundary sides of a rectangular optical image is aligned with a long boundary side of a trapezoidal projectable area of the projector.
REFERENCES:
patent: 6652104 (2003-11-01), Nishida et al.
patent: 2004104445 (2004-04-01), None
patent: 2004120614 (2004-04-01), None
patent: 2005159425 (2005-06-01), None
patent: 2007-17537 (2007-01-01), None
Mihara Hisayuki
Watanabe Kohei
Blakely , Sokoloff, Taylor & Zafman LLP
Kabushiki Kaisha Toshiba
Pyo Kevin
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