| http://www.w3.org/ns/prov#value | - A display system according to claim 3 arranged such that variable drive voltages are used to identify and distort the raster image point of the generated display in accordance with the following equations: ##EQU5## where Xc and Yc are the respective corrected voltages required to give predistortion, K is a constant and d is the distortion factor required.
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