Patent ID: 8902127

Claim:
A display wall comprising: a plurality of M tiles, each tile comprising: a plurality of display modules, two power supply units, each power supply unit arranged to drive a number of display modules and to provide a maximum brightness, wherein said power supply units are not over-dimensioned for redundancy, and means that, during a failure of a first power supply unit of the two power supply units, links the output of the other power supply unit of the tile or the outputs of other power supply unit(s) of at least one other tile together with the first and failed power supply unit, such that the display module or modules driven by the first and failed power supply unit continue(s) to operate, by redistribution of power from the other power supply unit(s) so that, upon linking of the other power supply unit(s), a new maximum brightness of the display module or modules normally driven by the first power supply unit is (N−1)/N times a previous maximum brightness, wherein N is the number of linked power supply units, wherein the display wall further comprises: a central controller configured such that when an operation mode is entered such that the outputs of power supply units are linked together such that the module or modules driven by the first and failed power supply continue(s) to operate by redistribution of power from the other power supply units from the at least one other tile, the central controller instructs all power supply units of all remaining tiles of the display wall to reduce brightness in the same proportion so that the image displayed by the wall remains uniform.