Liquid crystal display with coloured backlight

摘要

Colour crosstalk resulting from a backlight colour component (G) passing through the subpixel colour filters for another colour (B) and being variable as the colour components of the backlight are dimmed independently is compensated for. An input signal (1) is processed by a signal processing circuit (10) to be divided into an RGB backlight quantity (11) and subpixel transmittance (12). Based on the RGB backlight quantity (11), a correction coefficient calculation circuit (22) calculates a correction coefficient (23). A subpixel transmittance correcting circuit (24) receives the coefficient to correct the subpixel transmittance (12) to output corrected subpixel transmittance (25). The transmittance (25) is inputted to an LCD driver circuit (14) to drive an LCD panel (18). The RGB backlight quantity (11) is inputted to an LED driver circuit (13) to drive an LED backlight (17).