Portable electronic device with automatic determination of the orientation of the 'portrait ' or' landscape'

摘要

The device has an automatic portrait or landscape orientation determining unit including tactile surface extending on a rear face (14) of housing and a detecting unit detecting contact of fingers (24) of the user on the surface and produce position information of finger on the surface in response to the detection. The detecting unit calculates a line direction (28) of the positions of fingers on the surface. Discriminator blocks determine portrait or landscape orientation of the housing from combined information of finger position and hand position.