Active matrix display with pixel to pixel non-uniformity improvement at low luminance level

摘要

An active matrix display ( 1 ) comprises a pixel (P) including sub-pixels ( 10 ), and a drive circuit ( 6 ) which receives an input signal (IV) determining a desired luminance (BR) and a desired color (AC) of the pixel (P). The drive circuit ( 6 ) comprises a level detector ( 3 ) which determines whether the desired luminance (BR) is below a predetermined level (VT), and a controller ( 4 ) for, when the desired luminance (BR) is below the predetermined level (VT), (i) changing a number of the sub-pixels ( 10 ) contributing to the desired luminance (BR) into a lower number than optimally required to obtain the desired color (AC), and (ii) increasing a level of at least one of said contributing sub-pixels ( 10 ) to obtain a higher luminance of this one of said contributing sub-pixels ( 10 ) than if all the sub-pixels ( 10 ) required to obtain the desired color (AC) would contribute to the desired luminance (BR):