Patent ID: 6765634
Filing Date: 2004-07-20
Classification: C09K,G02F,H01J

Abstract:
A liquid crystal display device comprising:a fluorescent light tube as a light source, and a liquid crystal display panel for displaying images by controlling transmission of light from said fluorescent light tube; said liquid crystal display panel including: a color filter substrate having color filter layers of red, green and blue, an opposing substrate opposed to said color filter substrate, and a liquid crystal material being filled between said opposing substrate and said color filter substrate; wherein said fluorescent light tube includes a phosphor having luminous efficiency equivalent to 80% and below in comparison with LaPO4:Ce,Tb as a green phosphor, a maximum peak of a radiant energy spectrum of said phosphor is included within a spectral transmissive region of said green color filter layer, said radiant energy spectrum of said phosphor increases virtually continuously concerning points other than said maximum peak within a wavelength region where spectral transmissive regions of said blue and said green color filter layers overlap, and said fluorescent light tube and said color filter layers have a relation such that a color reproduction region of light emitted from said fluorescent light tube through said color filter layers has an NTSC ratio of 85% or higher.