Digital display

A digital display system, comprising:

• a digital display device for displaying an image;
• and
• a display controller arranged to control the digital display device to display pixels in an image at a required level of luminance by controlling a respective region of the digital display device to illuminate a first pixel for a respective first portion of an image refresh period and a second pixel for a respective second portion of the image refresh period, wherein the display controller includes
• an input for receiving image data defining luminance levels for the first and second pixels;
• a processor arranged with access to a first store and a second store provided for the first pixel and the second pixel, respectively, the processor configured to
• receive image data from the input defining a required luminance level for each of the first and second pixels,
• store in the respective store provided for the respective pixel content that indicates a number of discrete display device update cycles of predetermined length within the image refresh period for the respective pixel during which the pixel is to be illuminated such that the respective pixel is illuminated for a portion of the image refresh period corresponding to the required luminance level for the respective pixel, wherein each of the first and second pixels is illuminated for a portion of an update cycle during the image refresh period for the respective pixel, and wherein the content of the respective store further indicates an update cycle that is designated for illuminating the respective pixel for only a portion of the update cycle,
• read the content of the respective store for each respective pixel at each update cycle and generate an output to indicate which pixels are to be illuminated for the update cycle and which are not to be illuminated, in dependence upon the content of the respective pixel stores, wherein the content of the first store is different than the content of the second store, and
• update the content of the respective store for each respective pixel at each update cycle for which the respective content indicates that the respective pixel is to be illuminated to indicate that the number of update cycles for which the respective pixel is to be illuminated is reduced by one.