Portable electronic device i.e. key case, for e.g. controlling air-conditioning unit activation function in car, has tactile control key with touch-sensitive zone activated when finger of user is placed on case in determined area of zone

摘要

The device (1) has a microprocessor unit processing functions and/or data of the device and a vehicle. Manual control units having a tactile control key (5) and a control knob (6) control execution of functions of the microprocessor unit. A touch-sensitive zone of the key is arranged on an inner face of an insulating upper part (10) of a non metallic case near a visible portion of a display screen (3) e.g. matrix LCD, and activated in a capacitive manner when a finger of a user is placed on the case in a determined area of the zone, in an operating mode.