Patent ID: 7312767

Claim:
A method for compensating burn-in effects on a display screen, having a plurality of luminous cells corresponding to the color components of pixels of a video picture, and an input video value of a color component of a pixle is converted into a digital code word determining the length of the time period during which the corresponding luminous cell is activated, wherein to each bit of said digital code word, a sub-field consisting of a certain part of a frame period is assigned, and a bit entry associated with the sub-field determines whether the luminous cell is activated or deactivated for light output during the assigned sub-field, comprising the steps of: generating a wiper consisting of a geometrical area of the display screen for the cells being activated for light output; moving the wiper at least one time over the complete display screen or a part of the display screen; and using a sub-field organization for driving the luminous cells inside the wiper in which less sub-fields are present than in the sub-field organization used for displaying normal video pictures.