In the portable information terminal device 1a, when a second display portion 9 is flipped over to the front of the portable information terminal device 1a, a first display portion 3 and the second display portion 9 are visible from a user at the same time. The display layouts of the first display portion...http://www.google.fr/patents/US7460108?utm_source=gb-gplus-shareBrevet US7460108 - Portable information terminal device
