Invention Grant
US08476569B2 Image projection device having a deflection section with a deflection control section for distortion correction and speed correction 失效
图像投影装置具有偏转部分,其具有用于失真校正和速度校正的偏转控制部分

  • Patent Title: Image projection device having a deflection section with a deflection control section for distortion correction and speed correction
  • Patent Title (中): 图像投影装置具有偏转部分,其具有用于失真校正和速度校正的偏转控制部分
  • Application No.: US13059200
    Application Date: 2009-07-15
  • Publication No.: US08476569B2
    Publication Date: 2013-07-02
  • Inventor: Kenji KonnoKenji Mizumoto
  • Applicant: Kenji KonnoKenji Mizumoto
  • Applicant Address: JP Tokyo
  • Assignee: Konica Minolta Opto, Inc.
  • Current Assignee: Konica Minolta Opto, Inc.
  • Current Assignee Address: JP Tokyo
  • Agency: Cozen O'Connor
  • Priority: JP2008-209883 20080818
  • International Application: PCT/JP2009/062777 WO 20090715
  • International Announcement: WO2010/021215 WO 20100225
  • Main IPC: H01L27/00
  • IPC: H01L27/00
Image projection device having a deflection section with a deflection control section for distortion correction and speed correction
Abstract:
An object is to provide a image projection device which has a small size but can project an image having a high image quality. To achieve the object, in an image projection device, a reflection part which reflects a light flux from a light source is, while being rotated around a first axis by non-resonance driving, rotated by resonance driving around a second axis which is substantially perpendicular to the first axis, and thereby the light flux is deflected in a two-dimensional direction. By controlling the rotation of the reflection part, a correction for suppressing an image distortion along one scanning direction on a projection surface, and a correction for keeping substantially constant a scanning speed of the light flux along the other scanning direction on the projection surface, are performed. Here, the relationship of 10°
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