A position detector 1 detects the position of a display screen 4, an image memory 2 stores image information, a selector 3 selects a portion of the image information stored in the image memory 2 in accordance with the position of the display screen 4 detected by the position detector 1 and supplies...http://www.google.de/patents/US5714972?utm_source=gb-gplus-sharePatent US5714972 - Display apparatus and display method
