Patent ID: 7946723
Filing Date: 2011-05-24
Classification: G02F

Abstract:
1. A backlight device for illuminating a transmissive color liquid crystal display panel with white light from a backside thereof, said backlight device comprising, as a light source: a plurality of first principal light emitting device strings, each of said strings being a string of a plurality of light emitting devices emitting white light of preset luminance and preset chromaticity; a plurality of second principal light emitting device strings, each of said strings being a string of a plurality of light emitting devices emitting white light of luminance lower than said preset luminance and preset chromaticity; a number of said second principal light emitting device strings being smaller than a number of said first principal light emitting device strings; a plurality of first subsidiary light emitting device strings, each of said strings being a string of a plurality of light emitting devices emitting white light of said preset luminance and chromaticity in a first vicinity of said preset chromaticity; a number of said first subsidiary light emitting device strings being smaller than the number of said first principal light emitting device strings; and a plurality of second subsidiary light emitting device strings, each of said strings being a string of a plurality of light emitting devices emitting white light of luminance lower than said preset luminance and chromaticity in a second vicinity of said preset chromaticity; a number of said second subsidiary light emitting device strings being smaller than the number of said first subsidiary light emitting device strings; wherein when said first principal light emitting device strings, second principal light emitting device strings, first subsidiary light emitting device strings and said second subsidiary light emitting device strings are arrayed in a one-dimensional matrix pattern in a vertical direction of said color liquid crystal display panel, with a horizontal direction of said color liquid crystal display panel being a longitudinal direction, said first subsidiary light emitting device strings are arrayed within said color liquid crystal display panel, based on chromaticity, said second principal light emitting device strings being arrayed within said color liquid crystal display panel, based on luminance; and wherein said second subsidiary light emitting device strings are arrayed within said color liquid crystal display panel based on chromaticity or within said color liquid crystal display panel, based on luminance.