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PROJECTION UNIT HAVING SPECKLE SUPPRESSION DEVICE BASED ON PIEZOELECTRIC ACTUATING

  • US 20100141898A1
  • Filed: 12/03/2009
  • Published: 06/10/2010
  • Est. Priority Date: 12/10/2008
  • Status: Active Grant
First Claim
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1. A projection unit comprising a coherent light source and a beam shaping element forming a light beam which is directed towards a display, wherein the projection unit comprises a laser speckle suppression device which is positioned between the light source and the display and wherein the laser speckle suppression device is a diffusing element actuated randomly by a vibrating structure.

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