US Patent 9423895 Dual touch surface multiple function input device

For one disclosed embodiment, an apparatus includes a first housing and a second housing coupled to the first housing. The first housing and the second housing are rotatable between an open configuration and a closed configuration. The apparatus further includes and a touch input device supported by the first housing. The touch input device is configured to have a first active touch surface when the first housing and the second housing are in the open configuration, and a second active touch surface when the first housing and the second housing are in the closed configuration. The first active touch surface is smaller than the second active touch surface.