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Projection type image display device, manipulation detection device and projection type image display method

  • US 10,025,430 B2
  • Filed: 10/08/2013
  • Issued: 07/17/2018
  • Est. Priority Date: 10/08/2013
  • Status: Active Grant
First Claim
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1. A projection type image display device that projects anddisplays an image, the projection type image display device comprising:

  • an image projecting unit that projects an image;

    at least one or more lighting units that illuminates (or irradiates) an illuminating light that is different from the projection light from the image projecting unit onto a manipulation surface which at least partially overlaps an image projection surface onto which the image projecting unit projects an image;

    an image capture unit that captures an image of the manipulation surface;

    a first detection unit that performs a first detection process to detect the position where a first object being manipulated that emits light from a distal end, contacts the manipulation surface;

    a second detection unit that performs a second detection process to detect the position that a second object being manipulated that does not emit light, contacts the manipulation surface, and that is different from the first detection process;

    a control unit that controls the operation of the projection type image display device, to change at least a part of the image that is projected by the image projecting unit based on detection results from the first detection unit or the second detection unit,wherein the control unit performs control to notify of a change in the state;

    when changing from the state where both the first detection unit and the second detection unit can perform detection, to a state where either one of the first detection unit or the second detection unit cannot perform detection; and

    when changing from the state where either one of the first detection unit or the second detection unit cannot perform detection to a state where both the first detection unit and the second detection unit can perform detection, andwherein the control unit performs control to notify of a change in the state by utilizing the light emitted by the first object being manipulated.

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