Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2005-01-12
2009-08-04
Caley, Michael H (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S069000, C349S070000, C349S106000
Reexamination Certificate
active
07570319
ABSTRACT:
A primary object of the present invention is to provide a liquid crystal display device being capable of displaying an image with large color reappearance area and a genuine hue and chroma, while controlling a displacement of white chromaticity caused by changes of viewing angles. The device includes: a light source; a back light controlling a luminous intensity distribution from the light source; and a liquid crystal display panel controlling a transmission rate of light from the back light. The maximum intensity of a light emitting spectrum of the back light is in a range of 510 nm to 530 nm in a wavelength range of 500 nm to 550 nm, wherein the liquid crystal panel includes a red color filter transmitting red components, a green color filter transmitting green components and a blue color filter transmitting blue components, and a transmit spectrum of the green color filter includes a half value of a maximum transmitting rate of 500 nm to 590 nm in a wavelength range. The change of the transmit spectrum between viewing angle of 0° and 60° is within 20% from front direction in a wavelength range of 500 nm to 600 nm.
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Buchana Ingersoll & Rooney PC
Caley Michael H
Mitsubishi Denki & Kabushiki Kaisha
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