Patent ID: 8078105

Claim:
A hinge assembly for an electronic device that pivotally connects a flip module to a base module with a keypad, wherein the flip module has a front face with an internal display and a back face with an external display, the hinge assembly comprising: a cylindrical rotatable assembly configured to enable the flip module to rotate in relation to the base module about a rotatable axis associated with the cylindrical rotatable assembly, the cylindrical rotatable assembly further comprising, a free-wheel component on the exterior of the cylindrical assembly, wherein the free-wheel component is configured to perform a scroll function that includes a scroll-up operation and a scroll-down operation; a flip-closed position, in which the flip module interfaces with the base module, wherein a user interface (UI) displayed on the external display is controlled by the free-wheel component on the cylindrical rotatable assembly; and a flip-open position, in which the flip module is substantially separated from the base module and the keypad is accessible, wherein the UI displayed on the internal display is controlled by the free-wheel component on the cylindrical rotatable assembly.