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Patent Searching and Data


Title:
IMAGE PROJECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/021215
Kind Code:
A1
Abstract:
Provided is a small-size image projection device which can project a high-quality image.  The image projection device includes a reflection unit which reflects a light flux from a light source and is rotated around a first axis by a non-resonance drive and around a second axis substantially orthogonally intersecting the first axis, by a resonance drive, thereby polarizing the light flux in a two-dimensional direction.  By controlling the rotation of the reflection unit, it is possible to make a correction to suppress an image distortion along one (first) scan direction on the projection surface and a correction to maintain a substantially constant light flux scan speed along the other (second) scan direction on the projection surface.  When the reflection unit is located at the center position of rotation around the first and the second axis, the angle θ satisfies the relationship 10 degrees <θ < 70 degrees, wherein θ is the angle of inclination of the light flux projected onto the projection surface in the second scan direction with respect to the normal of the projection surface.

Inventors:
KONNO KENJI (JP)
MIZUMOTO KENJI (JP)
Application Number:
PCT/JP2009/062777
Publication Date:
February 25, 2010
Filing Date:
July 15, 2009
Export Citation:
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Assignee:
KONICA MINOLTA OPTO INC (JP)
KONNO KENJI (JP)
MIZUMOTO KENJI (JP)
International Classes:
G02B26/10; G03B21/00; H04N5/74
Foreign References:
JP2008164955A2008-07-17
JP2007199251A2007-08-09
JP2008164957A2008-07-17
JP2008151887A2008-07-03
JP2006178346A2006-07-06
JP2006178346A2006-07-06
JP2002328428A2002-11-15
Other References:
See also references of EP 2315067A4
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
Hidetoshi Yoshitake (JP)
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