Patent ID: 7553054
Filing Date: 2009-06-30
Classification: F21S,F21Y

Abstract:
1. A vehicular lamp unit comprising: a light emitting element, which is disposed on an optical axis extending in forward and backward directions of the lamp unit so as to be directed downward, and which has a plurality of light emitting chips disposed with a predetermined arrangement so as to be adjacent to each other; and a reflector, which reflects light emitted from the light emitting element to a forward direction and which has a reflection surface having a section along a vertical plane containing the optical axis, the section formed of a parabolic shape having a focal point on the optical axis, wherein the plurality of light emitting chips are configured by a plurality of special light emitting chips which front end edges are aligned on a horizontal line orthogonal to the optical axis passing through the focal point of the parabolic section and at least one general light emitting chip disposed on a backward side from the plurality of special light emitting chips, and wherein light emitting chips in each of at least two sets of light emitting chips, each set being selected so as to include at least one special light emitting chip of the plurality of special light emitting chips, are simultaneously lighted in a lighting mode corresponding to the respective set.