Keyboard formed from touch display panel, method of imparting a keyboard input function to a touch display device, and device having a keyboard or hand-writing input function and an image output function

A keyboard layout image is displayed on a touch display, so as to serve as a keyboard to perform a key-in function corresponding to the keyboard layout image through touching the touch display. The keyboard layout image displayed on the touch display may be defined by an end user. Furthermore, a plurality of such touch displays may be connected in series to form a bigger keyboard with more defined key images. The keyboard formed from a touch display panel according to the present invention may be used in a device with a keyboard or writing pad input function and an image output function to replace a conventional keyboard or writing pad.