Patent ID: 7369144

Claim:
A method for correcting the rotation of a video image display on a display screen by a scanning of the display screen according to lines inclined by a first angle with respect to a reference direction, the screen being scanned by at least one electron beam modulated by a modulation signal provided by a modulation system based on successive digital video data, comprising the steps of: (a) storing successive initial digital video data associated with the image to be displayed; and (b) transmitting to the modulation system new successive digital video data determined based on the successive initial digital video data, corresponding to the image which would be displayed from the initial digital video data for a scanning of the display screen according to lines inclined with respect to the reference direction by a second angle opposite to the first angle, wherein step (b) comprises the steps of: (c) determining each of the new digital video data based on initial digital video data associated with distinct scanned lines of the screen; and (d) successively transmitting to the modulation system, for each scanned line of the screen, the new digital video data associated with the scanning of a line of the display screen at the end of a dwell after the beginning of the line scanning, wherein at step (d), the dwell is a function of the scanned line and of the second angle.