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Liquid crystal display with a fluorescent backlight emitting polarised light

  • US 8,879,024 B2
  • Filed: 08/13/2009
  • Issued: 11/04/2014
  • Est. Priority Date: 09/10/2008
  • Status: Active Grant
First Claim
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1. An electro-optical switching element comprisingat least one light converter comprising a cholesteric liquid crystal, which comprises one or more light emitting moieties and wherein said at least one light converter is capable of converting light,wherein each light converter is capable of converting a state of polarization of the light from non-polarized light to circular polarized light and,wherein at least one light converter is capable of shifting the wavelength of the light to longer values,a liquid crystal material, which is capable of switching,one or more light polarizing devices, andoptionally an illuminator, andwherein one of said one or more light polarizing devices are positioned between said optional illuminator and said light converter and wherein said light converter is positioned between said one of said one or more light polarizing devices and said liquid crystal material.

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