Patent ID: 7236143

Claim:
An apparatus for a setting unit to configure ID to at least two displays, comprising: at least a first switch and a second switch, the first switch comprising an input terminal, an output terminal and a control terminal, and the second switch comprising an input terminal and a control terminal, wherein the input terminal of the first switch is electrically coupled to a communication interface transmission terminal of the setting unit, and the output terminal of the first switch is electrically coupled to the input terminal of the second switch, wherein the control terminals of the first and second switches are adapted for receiving an control signal from the displays, and are turned on or turned off after said switch receives signal sent from the control terminal of the display; first transmission line, electrically coupled to the input terminal of the first switch, the receiving terminals of the display and a transmission terminal of the setting unit; second transmission lines, electrically coupled to the output terminal of the first switch and the input terminal of the second switch and receiving terminals of the display; and third transmission lines, electrically coupled to the transmission terminals of the displays and a communication interface receiving terminal of the setting unit.