Patent ID: 8328379

Claim:
A backlight for a liquid crystal display device, comprising: a first plurality of light emitting diodes each having a first luminance and a first color rank in chromaticity coordinates; a second plurality of light emitting diodes each having a second luminance different from the first luminance and a second color rank in chromaticity coordinates different from the first rank in chromaticity coordinates, wherein at least the first and second plurality of light emitting diodes are interspersed with each other to provide an average luminance of the first and second luminances at a target value of luminance that is consistent across the liquid crystal display device, and wherein the first and second plurality of light emitting diodes are respectively grouped together to provide an average color rank of the first and second color ranks in chromaticity coordinates at a single target value of color rank in chromaticity coordinates; and a third plurality of light emitting diodes having a third luminance equal to the average luminance at the target value.