Patent ID: 8556480

Claim:
A projector headlight, comprising: a plurality of optical units including a first optical unit providing a first light distribution pattern, a second optical unit providing a second light distribution pattern and a third optical unit providing a third light distribution pattern, the plurality of optical units each including an optical axis, a light source and a projector lens, the projector lens having a light-emitting surface including a total reflection surface and a reflex surface including a light incoming surface, the light-emitting surface including the total reflection surface and the reflex surface, and the total reflection surface and the reflex surface being located opposite with respect to each other and each being curved in a convex shape having curvature factors, the light source including a plurality of light-emitting semiconductor devices and a base board such that the plurality of light-emitting devices are configured in line on the base board, the light source located adjacent to the light incoming surface of the projector lens so that the light-emitting semiconductor devices face the light incoming surface substantially in a horizontal direction with respect to a light-emission direction of the projector headlight, the first optical unit located so that an optical axis of the first optical unit is directed substantially in a direction parallel with the light-emission direction of the projector headlight, the second optical unit located adjacent to the first optical unit so that an optical axis of the second optical unit is slanted at a first angle (α) with respect to the optical axis of the first optical unit in an opposite direction of the first optical unit and substantially in a horizontal direction with respect to the light-emission direction of the projector headlight, the third optical unit located adjacent to the second optical unit so that an optical axis of the third optical unit is slanted at a second angle with respect to the optical axis of the second optical unit in the opposite direction of the second optical unit and substantially in a horizontal direction with respect to the light-emission direction of the projector headlight, and each of the plurality of optical units being configured such that the first light distribution pattern, the second light distribution pattern and the third light distribution pattern overlap with respect to each other, wherein the first light distribution pattern is the narrowest in a horizontal direction with respect to the light-emission direction of the projector headlight, the second light distribution pattern is wider than the first light distribution pattern in a horizontal direction with respect to the light-emission direction of the projector headlight, and the third light distribution pattern is wider than the second light distribution pattern in a horizontal direction with respect to the light-emission direction of the projector headlight.