A gate-high voltage supply unit of a display device, the gate-high voltage supply unit comprising: a first voltage input terminal to which a first voltage as a DC voltage is input, wherein the first voltage is supplied to a first node via a first diode; a second voltage input terminal to which a second voltage as an AC voltage is input, wherein the second voltage is charge-pumped by a first capacitor to the first voltage supplied to the first node; the first capacitor and a second resistor are connected in series and disposed between the first node and the second voltage input terminal, wherein the second resistor is configured to serve as a damping resistor for protecting the second voltage input terminal; a current control circuit connected to the first voltage input terminal and connected via the first diode to the first node, the current control circuit controlling a current value flowing from the first voltage input terminal to the first node so as to be equal to or less than a current limit value; and an output terminal connected to a third node via a third resistor for overcurrent-flowing prevention, wherein the third node is connected to a cathode of a second diode and wherein the first node is connected to an anode of the second diode, wherein the third node is connected to smoothing capacitor that is connected to ground potential for removing voltage ripples of the voltage provided from the second diode; wherein the current control circuit includes: a regulator of which an input terminal is coupled to the first voltage input terminal and of which an ADJ terminal is coupled to the first node via the first diode, wherein the ADJ terminal is directly connected to an anode of the first diode; and a first resistor between an output terminal of the regulator and the first node, wherein a first terminal of the first resistor is directly connected to the output terminal of the regulator and a second terminal of the first resistor is directly connected to the anode of the first diode. a first voltage input terminal to which a first voltage as a DC voltage is input, wherein the first voltage is supplied to a first node via a first diode; a second voltage input terminal to which a second voltage as an AC voltage is input, wherein the second voltage is charge-pumped by a first capacitor to the first voltage supplied to the first node; the first capacitor and a second resistor are connected in series and disposed between the first node and the second voltage input terminal, wherein the second resistor is configured to serve as a damping resistor for protecting the second voltage input terminal; a current control circuit connected to the first voltage input terminal and connected via the first diode to the first node, the current control circuit controlling a current value flowing from the first voltage input terminal to the first node so as to be equal to or less than a current limit value; and an output terminal connected to a third node via a third resistor for overcurrent-flowing prevention, wherein the third node is connected to a cathode of a second diode and wherein the first node is connected to an anode of the second diode, wherein the third node is connected to smoothing capacitor that is connected to ground potential for removing voltage ripples of the voltage provided from the second diode; wherein the current control circuit includes: a regulator of which an input terminal is coupled to the first voltage input terminal and of which an ADJ terminal is coupled to the first node via the first diode, wherein the ADJ terminal is directly connected to an anode of the first diode; and a first resistor between an output terminal of the regulator and the first node, wherein a first terminal of the first resistor is directly connected to the output terminal of the regulator and a second terminal of the first resistor is directly connected to the anode of the first diode. a regulator of which an input terminal is coupled to the first voltage input terminal and of which an ADJ terminal is coupled to the first node via the first diode, wherein the ADJ terminal is directly connected to an anode of the first diode; and a first resistor between an output terminal of the regulator and the first node, wherein a first terminal of the first resistor is directly connected to the output terminal of the regulator and a second terminal of the first resistor is directly connected to the anode of the first diode.