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Display device and electronic timepiece

  • US 6,147,937 A
  • Filed: 08/24/1998
  • Issued: 11/14/2000
  • Est. Priority Date: 05/07/1997
  • Status: Expired due to Term
First Claim
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1. A display device comprising:

  • a polarization axis changing element that selectively changes a polarization axis of light transmitted therethrough;

    a first polarization separator and a second polarization separator respectively arranged on front and rear sides of said polarization changing element with said polarization changing element interposed therebetween; and

    a light source arranged on a side of said second polarization separator opposed to said polarization axis changing element with said second polarization separator interposed therebetween;

    said first polarization separator transmitting all wavelengths, in the visible light region, of light linearly polarized in a first direction, and transmitting a specific wavelength, in the visible light region, of light linearly polarized in a second direction perpendicular to said first direction, and not transmitting other wavelengths of light linearly polarized in the second direction therethrough;

    said second polarization separator transmitting light linearly polarized in a third direction while reflecting light linearly polarized in a direction perpendicular to said third direction; and

    said light source emits colored light.

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