Neighbourhood brightness matching for uniformity in a tiled display screen

摘要

Brightness between the individual tiles of a tiled display system 260 is matched for improved uniformity and overall brightness of images produced by the display system. Regions 253 of the display system adjacent to a tile 251 with low brightness performance are incremented in brightness from the brightness level of the low brightness tile to the brightness level of higher brightness tiles 254. By incrementing the brightness of such regions according to embodiments of the invention, perceived brightness uniformity of images produced by the tiled display system is maintained while maximizing the overall brightness of the display device. The regions used to increment brightness may be as large as an entire tile or as small as a single pixel element. A luminance detector sends luminance information to a control unit which determines if the brightness of a first tile is below a threshold value, if so the brightness of adjacent tiles is adjusted.