IMPROVED DISPLAY DEVICE BASED ON PIXELS WITH VARIABLE CHROMATIC COORDINATES

摘要

A pixel with variable chromatic coordinates, comprises a plurality of colour sub-pixels consisting of a light emitter and of a coloured filter. The light emitters are identical and have an emission spectrum that can be modulated as a function of their supply voltage and/or their supply current. The pixel control circuit supplies each colour sub-pixel with a supply voltage (VR) and/or current dependent on the colour of the sub-pixel so that its emission spectrum approximates the transmission spectrum of the associated coloured filter. Control means (T3, RL) make it possible to modify the duration of application of the supply voltage and/or current as a function of the colour of the sub-pixel so as to obtain a predetermined mean luminance over a predetermined period.