A display device comprises a height-adjustable display board (10) which is adapted to be written on. Further, the display device comprises a height-adjustable projection unit (18) for projecting images onto the display board (10). With the aid of a mechanical connection means (20,22) connecting the display board (10) to the projection unit (18), it is guaranteed that, upon vertical displacement of the display board (10) or the projection unit (18), a vertical distance between the display board (10) and the projection unit (18) will be substantially maintained.