A switchable display device (100) which is arranged to switch a portion of the display device (100) between a single-view mode and a multi-view mode is disclosed. The display device (100) comprises: receiving means (102) for receiving an information signal, the information signal having a format comprising...http://www.google.com.au/patents/US20080043094?utm_source=gb-gplus-sharePatent US20080043094 - Detection of View Mode