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Projection type display device and light source device

  • US 7,988,305 B2
  • Filed: 03/22/2007
  • Issued: 08/02/2011
  • Est. Priority Date: 03/23/2006
  • Status: Active Grant
First Claim
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1. A projection type display device, comprising:

  • a laser light source unit having a light emission region for emitting an elliptical laser light;

    a focusing lens unit for focusing the laser light emitted from the laser light source unit;

    a lenticular lens for refracting the laser light focused by the focusing lens unit;

    a homogenizer having a rectangular incident surface on luminous flux focused by the focusing lens unit;

    a spatial light modulation element for modulating the laser light emitted from the homogenizer; and

    a projection lens for projecting the laser light modulated by the spatial light modulation element,wherein;

    the lenticular lens is rotatable about an axis parallel to an optical axis,the incident surface of the homogenizer has a rectangular shape, andthe laser light source unit is arranged such that a longer axis direction of the light emission region and a longer side direction of the incident surface of the homogenizer are substantially parallel.

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