Headlight controller

A headlight controller, an optical unit (20L, 20R) and a vehicle headlight can include a headlight controller and an optical unit (20L, 20R). The headlight controller can include a system controller (11) and a camera (10) photographing vehicles located in a forward direction thereof, and the system controller (11) can be configured to output a control signal to provide various favorable light distribution patterns by using image data output from the camera (10) in accordance with traffic conditions. The optical unit (20L, 20R) can be configured to emit beam lights each having a light-emitting angle using lights emitted from first and second white LEDs (LED1-LED7) via a projector lens (41) so that the beam lights can be used as a high and low beam without movable parts. Thus, the disclosed subject matter can include providing vehicle headlights that can form various favorable light distribution patterns by utilizing the characteristics of the controller and the optical unit (20L, 20R) in accordance with the traffic conditions.