Patent ID: 7002546
Filing Date: 2006-02-21
Classification: G09G,Y10S

Abstract:
1. A variably controlled LCD backlight, comprising: a first light source emitting light within a first spectral power distribution and having a first radiant power output; a second light source emitting light within a second spectral power distribution and having a second radiant power output; a detector configured to detect the first and second radiant power outputs; a processor, connected to the detector, that calculates chromaticity and luminance values of the emitted light based on the first and second radiant power outputs, the processor further configured to compare the calculated chromaticity and luminance values with desired chromaticity and luminance values, respectively; and a controller, operationally connected to the processor, that is configured to adjust one or more of the first radiant power output and the second radiant power output in response to a difference between the calculated chromaticity and luminance values and the desired chromaticity and luminance values.