Display unit comprising: - multiple screens (4, 6, 8, 10) arranged parallel to a single display plane so as to form a total display area for an image which is equal to the total of the individual display areas of each screen, minus any overlap areas between the individual display areas, - a mechanism for moving the screens (4, 6, 8, 10) parallel to the display plane, between a retracted position in which at least two screens overlap so as to reduce the total display area, and a fully deployed position in which there is little or no overlap of the screens, to increase the total display area, - a computer which is able to command the display of portions of an image on respective screens so as to display the complete image over the entire total display area, this computer being able in particular to command the display of a complete image over the entire total display area, both in the retracted position and in the fully deployed position, and - at least one sensor which is able to measure the position of the screens, and the computer is able to automatically adapt the display of the image depending on the measured position of the screens, characterized in that - the display unit comprises a first, a second, a third and a fourth screen (4, 6, 8, 10) which can be moved with respect to one another parallel to a single display plane, - the moving mechanism permits: • movement of the second and third screens only in translation along, respectively, orthogonal directions Y and X, and • permits movement of the fourth screen only in translation along a direction U at an angle of 45° with the directions X and Y, - the display unit comprises a synchronisation mechanism which is able to impose a correlation between the movements of these second, third and fourth screens in order that the ratio of width to height of the total display area is constant whatever the position of the first, second and third screens (6, 8, 10). - multiple screens (4, 6, 8, 10) arranged parallel to a single display plane so as to form a total display area for an image which is equal to the total of the individual display areas of each screen, minus any overlap areas between the individual display areas, - a mechanism for moving the screens (4, 6, 8, 10) parallel to the display plane, between a retracted position in which at least two screens overlap so as to reduce the total display area, and a fully deployed position in which there is little or no overlap of the screens, to increase the total display area, - a computer which is able to command the display of portions of an image on respective screens so as to display the complete image over the entire total display area, this computer being able in particular to command the display of a complete image over the entire total display area, both in the retracted position and in the fully deployed position, and - at least one sensor which is able to measure the position of the screens, and the computer is able to automatically adapt the display of the image depending on the measured position of the screens, - the display unit comprises a first, a second, a third and a fourth screen (4, 6, 8, 10) which can be moved with respect to one another parallel to a single display plane, - the moving mechanism permits: • movement of the second and third screens only in translation along, respectively, orthogonal directions Y and X, and • permits movement of the fourth screen only in translation along a direction U at an angle of 45° with the directions X and Y, • movement of the second and third screens only in translation along, respectively, orthogonal directions Y and X, and • permits movement of the fourth screen only in translation along a direction U at an angle of 45° with the directions X and Y, - the display unit comprises a synchronisation mechanism which is able to impose a correlation between the movements of these second, third and fourth screens in order that the ratio of width to height of the total display area is constant whatever the position of the first, second and third screens (6, 8, 10).