×

Polarization conversion device and projector system

  • US 8,955,978 B2
  • Filed: 11/20/2012
  • Issued: 02/17/2015
  • Est. Priority Date: 12/12/2011
  • Status: Active Grant
First Claim
Patent Images

1. An external polarization conversion device used for a projector, comprising:

  • a first element that converts light from the projector to polarized light in a uniform polarization direction;

    a second element that is arranged in a position subsequent to the first element in such a way that there is a space between the first element and the second element and that converts the polarized light from the first element to predetermined polarized light that is different from the polarized light from the first element;

    a cooling device that circulates a coolant in the space and thereby cools the first element and the second element; and

    a pair of cover portions that fix the first element and the second element,the pair of cover portions covering the space and forming a flow path of the coolant from the cooling device.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×