Patent ID: 7734318

Claim:
A portable information processing device, comprising: a first housing part having a key input portion; and a second housing part having a main display portion, the first housing part and the second housing part being movably joined together to any one of a plurality of arrangement positions; an image display means for display processing of an image on the main display portion; a placement detection means for detecting whether or not the device has been placed in an external device; a setting discrimination means for discriminating whether or not an automatic display setting of said image exists when the placement detection means detects that the device has been placed in the external device; a position discrimination means for discriminating whether or not an arrangement position of the first housing part and second housing part is in a display arrangement position such that the main display portion faces outward; and a display control means for initiating startup of display processing of said image by the image display means when the setting discrimination means discriminates that the automatic display setting exists and the position discrimination means discriminates that the arrangement position of the first housing part and second housing part is in the display arrangement position; wherein said display control means performs display processing in a mode different from said display processing of said image by said image display means on a condition of not being placed in the external device when detected as having been placed in the external device by said placement detection means and starting display processing of said image by said image display means.