CONTROL SYSTEM AND METHOD FOR DEFINING FUNCTION THEREOF

A control system and a method for defining function thereof are provided. The control system includes a touchpad and a key sheet, wherein the touchpad includes a touch sensing surface and the key sheet includes a first surface and a second surface opposite to the first surface. The key sheet is detachably disposed on the touch sensing surface with the second surface facing toward the touch sensing surface. The second surface comprises at least one identification pattern for generating an attribute recognition signal when the at least one identification pattern contacts or approaches the touch sensing surface. The attribute recognition signal reflects features of the identification patterns and is used to determine a type of a controllable device. The features include one or a combination of a number of the identification patterns, a touch position of each identification pattern, and a shape of each identification pattern.