Optical correction for high uniformity panel lights

摘要

A display has a spatial light modulator (10) for dynamically controlling a luminance of each pixel according to an input signal, the spatial light modulator having a non uniform spatial characteristic, the display also having an optical filter (20) having a spatial pattern to alter the luminance to compensate at least partially for the non uniform spatial characteristic. An electronic signal processing element applies some pre compensation predominantly of higher spatial frequencies for the non uniform spatial characteristic. Such dynamic and optical compensation can enable tuning for different optimizations or for compensating for variations over time. A backlight has an optical source and an optical filter, the source having a color output which has a non uniform spatial characteristic, and the optical filter having a spatial pattern to alter the color to compensate in part at least for the non uniform spatial characteristic.

主权项

1. A display comprising
a backlight having a plurality of differently colored light sources, the backlight being coupled to a spatial light modulator, a display element part having addressable pixels of the spatial light modulator for dynamically controlling a luminance of each of said addressable pixels according to an input signal, the input signal comprising the information corresponding to an image to be displayed by the addressable pixels of the display, the spatial light modulator having a non-uniform spatial optical characteristic dependent upon video level, an optical and electronic correction part having an optical filter having a non-uniform spatial pattern to alter the luminance and/or color to compensate at least partially for the non-uniform spatial optical characteristic of the spatial light modulator and an electronic signal processing element arranged to apply some pre-compensation for the non-uniform spatial optical characteristic of the spatial light modulator to the input signal, wherein the optical filter is arranged downstream of the spatial light modulator.