| 摘要 |
A headlamp and method for illumination of the headlamp in which during low beam irradiation, a light distribution pattern P(L) for a low beam is formed by turning on a lighting unit for a low beam and during high beam irradiation, a lighting unit for a high beam is also turned on at the same time to superpose an additional light distribution pattern P(H1) for a high beam thereon, thereby forming a light distribution pattern P(H) for a high beam. During the high beam irradiation, furthermore, a tilting unit of the headlamp is tilted upward by approximately 1.5 degrees and a hot zone HZ(L) of the light distribution pattern P(L) for a low beam is moved to a long distance region in a road placed ahead of a vehicle, thereby enhancing a distance visibility. A central luminous intensity position M of the additional light distribution pattern P(H1) for a high beam is set to be lower than a horizontal cutoff line CL1 of the light distribution pattern P(L) for a low beam by approximately 1 degree such that it is suitable for enhancing the distance visibility during the high beam irradiation.
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