Patent ID: 7079207
Filing Date: 2006-07-18
Classification: G02F

Abstract:
1. A liquid crystal display, comprising a liquid crystal display device comprising a liquid crystal layer sandwiched between two transparent substrates for modulation of a phase of incident light depending on an applied voltage, and an electrode and a driving circuit for applying a voltage to the liquid crystal layer independently for each pixel, an illumination light source that faces away a viewing side of the liquid crystal display device, a circularly polarizing plate interposed between the illumination light source and the liquid crystal display device, and a circularly polarizing plate located on the viewing side of the liquid crystal display device, wherein: said liquid crystal layer is provided on an illumination source side thereof with a first filter comprising a cholesteric liquid crystal filter of a type semi-transparent to light in all red, green and blue wavelength ranges, and said liquid crystal layer is provided on the viewing side with a second filter comprising an array form of cholesteric liquid crystal color filter that is capable of transmitting only light in the red, green and blue wavelength ranges and reflecting light in other wavelength ranges depending on a pixel arrangement, and a third filter comprising an array form of absorption type color filter that is located in alignment with said second filter at a viewing side thereof to transmit only light in the red, green and blue wavelength ranges and absorb light in other wavelength ranges.