An apparatus comprising: an LED array, comprising at least one LED; a regulator circuit configured to generate at least one positive supply voltage from at least a portion of a light-emitting diode driving current passed through the LED array; and a converter circuit configured to receive a first control signal and output a second control signal by converting the first control signal; an LED driver configured to generate, from an input voltage, the LED driving current having a magnitude that follows the magnitude of the input voltage full-wave rectified from an AC voltage and to adjust the magnitude of the LED driving current based on the second control signal; and a component comprising a circuit that is configured to receive the at least one positive voltage and to generate the first control signal based on an external signal input from outside of the apparatus, wherein the regulator circuit is connected to the LED driver and further configured to receive the at least a portion of the LED driving current from the LED driver; characterized in that wherein the LED driver is further configured to receive the LED driving current from the LED array and provide, from the received LED driving current, the at least a portion of the LED driving current to the regulator circuit, wherein the LED driver comprises a first current supply circuit (158, 158c, 158d) configured to recognize the magnitude of the LED driving current through a dimming signal converted from the second control signal, and wherein the first current supply circuit (158, 158c, 158d) is further configured to provide, to the regulator circuit, a supplementary current generated from the input voltage when the recognized magnitude of the LED driving current is smaller than a preset reference value. an LED array, comprising at least one LED; a regulator circuit configured to generate at least one positive supply voltage from at least a portion of a light-emitting diode driving current passed through the LED array; and a converter circuit configured to receive a first control signal and output a second control signal by converting the first control signal; an LED driver configured to generate, from an input voltage, the LED driving current having a magnitude that follows the magnitude of the input voltage full-wave rectified from an AC voltage and to adjust the magnitude of the LED driving current based on the second control signal; and a component comprising a circuit that is configured to receive the at least one positive voltage and to generate the first control signal based on an external signal input from outside of the apparatus, wherein the regulator circuit is connected to the LED driver and further configured to receive the at least a portion of the LED driving current from the LED driver; characterized in that wherein the LED driver is further configured to receive the LED driving current from the LED array and provide, from the received LED driving current, the at least a portion of the LED driving current to the regulator circuit, wherein the LED driver comprises a first current supply circuit (158, 158c, 158d) configured to recognize the magnitude of the LED driving current through a dimming signal converted from the second control signal, and wherein the first current supply circuit (158, 158c, 158d) is further configured to provide, to the regulator circuit, a supplementary current generated from the input voltage when the recognized magnitude of the LED driving current is smaller than a preset reference value.