Abstract: A head lamp apparatus may control a supply of power to a laser diode based on a quantity of white light outputted to an outside environment in the head lamp apparatus using the laser diode as a light source, and controls a power supply using only a quantity of pure white light excluding noise light when the supply of power to the laser diode is controlled, thus maximally preventing blue laser beams, which are harmful to human bodies, from being exposed to the outside environment, and allowing an operation of a head lamp to be precisely controlled.

Abstract: An LED driving apparatus group in which first and second LED groups are connected in series is provided. The apparatus includes a voltage input unit that receives an input voltage from a vehicle power device and a current controller that generates a current with a predetermined level by adjusting the received input voltage and provides the current to an input terminal of the first LED group. A first feedback path feeds back a voltage applied to a first node, which is connected to an output terminal of the first LED group, to an input terminal of the current controller. A first switching unit is disposed on the first feedback path and is switched on or off based on a control signal. A second switching unit is disposed between an output terminal of the second LED group and ground and is switched on or off based on the control signal.

Abstract: A head lamp apparatus may control a supply of power to a laser diode based on a quantity of white light outputted to an outside environment in the head lamp apparatus using the laser diode as a light source, and controls a power supply using only a quantity of pure white light excluding noise light when the supply of power to the laser diode is controlled, thus maximally preventing blue laser beams, which are harmful to human bodies, from being exposed to the outside environment, and allowing an operation of a head lamp to be precisely controlled.

Abstract: An LED driving apparatus group in which first and second LED groups are connected in series is provided. The apparatus includes a voltage input unit that receives an input voltage from a vehicle power device and a current controller that generates a current with a predetermined level by adjusting the received input voltage and provides the current to an input terminal of the first LED group. A first feedback path feeds back a voltage applied to a first node, which is connected to an output terminal of the first LED group, to an input terminal of the current controller. A first switching unit is disposed on the first feedback path and is switched on or off based on a control signal. A second switching unit is disposed between an output terminal of the second LED group and ground and is switched on or off based on the control signal.