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Image projector

  • US 7,866,831 B2
  • Filed: 03/13/2006
  • Issued: 01/11/2011
  • Est. Priority Date: 03/16/2005
  • Status: Expired due to Fees
First Claim
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1. An image projector, comprising:

  • a coherent light source;

    a collimator lens that collimates coherent light from said coherent light source to form collimated coherent light;

    a projector optical system that projects the collimated coherent light;

    a reflector element that reflects the collimated coherent light and is capable of vibrating in parallel with a direction normal to a reflector surface of said reflector element; and

    a reflector element driver unit that drives said reflector element in vibrating motion;

    wherein said reflector element driver unit drives said reflector element in reciprocatory vibrating motion in a normal direction of a principal surface of said reflector element; and

    wherein a vibration range of said reflector element is more than or equal to square root of 2 times of a maximum period of concavity and convexity profile which is formed on a surface of said first diffuser element and used for light diffusion.

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