Patent ID: 6611245
Filing Date: 2003-08-26
Classification: G09G

Abstract:
An active matrix electroluminescent display device comprising an array of display pixels arranged in rows and columns, each pixel comprising an electroluminescent display element and a switching means for controlling the current through the display element based on a signal voltage applied to the pixel, each row of pixels sharing a common line, currents through the display elements of a row of pixels passing along the common line, different voltages thereby being present at different points along the common line; anddriver circuitry for generating signal voltages corresponding to desired outputs from the display elements, and for applying signal voltages to rows of pixels in sequence, characterized in that the device further comprises: means for generating error values for each pixel in a row of pixels to be addressed, to compensate for said different voltages in said common line, derived from a circuit representing an additional row of pixels and associated with the driver circuitry, and to which the signal voltages for the row of pixels to be addressed are applied; means for updating the signal voltages for each pixel in the row of pixels to be addressed, where required, using the error values; and means for supplying the updated signal voltages to the pixels.