Light distribution control device, headlight device, and light distribution control method

A headlight device comprising:

• a high beam emitter capable of dividing a high beam irradiation area into a plurality of areas;
• and
• processing circuitry configured to
• detect whether or not an irradiation target to be irradiated with a high beam or a light shielding target to be shielded from the high beam is present in the high beam irradiation area:
• determine a light shielding region for shielding the light shielding target when the light shielding target is detected;
• calculate an optical axis adjustment amount for adjusting a direction of an optical axis of the high beam emitter in such a manner that the irradiation target is out of the light shielding region when the irradiation target is included in the light shielding region;
• and
• control the optical axis of the high beam emitter on a basis of the optical axis adjustment amount.

A light distribution control method for controlling a high beam emitter capable of dividing a high beam irradiation area into a plurality of areas, the light distribution control method comprising:

• detecting whether or not an irradiation target to be irradiated with a high beam or a light shielding target to be shielded from the high beam is present in the high beam irradiation area;
• determining a light shielding region for shielding the light shielding target when the light shielding target is detected;
• calculating an optical axis adjustment amount for adjusting a direction of an optical axis of the high beam emitter in such a manner that the irradiation target is out of the light shielding region when the irradiation target is included in the light shielding region;
• and
• controlling the optical axis of the high beam emitter on a basis of the optical axis adjustment amount.