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Image projection apparatus

  • US 7,866,823 B2
  • Filed: 04/23/2007
  • Issued: 01/11/2011
  • Est. Priority Date: 04/27/2006
  • Status: Active Grant
First Claim
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1. An image projection apparatus comprising:

  • an image-forming element configured to be illuminated with light from a light source;

    a projection lens configured to include a focus lens and configured to project light from the image-forming element onto a projection surface;

    plural temperature detectors configured to be provided at positions different from each other in the image projection apparatus and configured to detect temperatures at the respective positions as detection results;

    a controller configured to control the position of the focus lens on the basis of the detection results by the plural temperature detectors; and

    an optical member configured to introduce the light from the image-forming element to the projection lens,wherein a first temperature detector of the plural temperature detectors is configured to detect the temperature of the optical member or in a region adjacent thereto, andwherein the region adjacent to the optical member is closer to the optical member than the projection lens.

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