Patent ID: 7901122

Claim:
A lamp unit used in a vehicular lamp, the lamp unit comprising: a reflector comprising a parabolic cylindrical reflective surface with a focal line in a horizontal direction; a planar light source comprising a light-emitting surface with a generally oblong shaped region; and light source driving means for rotatably supporting the planar light source, wherein the generally oblong shaped region of the planar light source comprises a long side in a direction parallel to the focal line and a short side of a predetermined width, wherein the planar light source is disposed such that the light-emitting surface faces the parabolic cylindrical reflective surface of the reflector and such that the long side, on a lamp front side, generally coincides with the focal line and acts as a rotational axis, wherein the planar light source is rotatable about the rotational axis from a first position to a second position, the lamp unit has an optical axis perpendicular to the rotational axis, in the first position, light emitted by the planar light source is reflected by the reflector such that some of the reflected light is parallel to the optical axis, and some of the reflected light is directed at a first angle downwards from the optical axis, and in the second position, light emitted by the planar light source is reflected by the reflector such that some of the reflected light is parallel to the optical axis, and some of the reflected light is directed at a second angle downwards from the optical axis, and wherein the second angle is smaller than the first angle.