Patent ID: 9739437
Date: 2017-08-22
CPC Classifications: F21S

Claim:
1. A vehicular lamp unit, comprising: a flat substrate; a light source comprising a first light-emitting element and a second light-emitting element disposed on the substrate; and an optical element having the light source attached thereto, wherein the substrate is long in a first direction, wherein the optical element radiates emitted light of the first and second light-emitting elements toward a front of the vehicular lamp unit, with a desired light distribution, wherein a reference portion serving as a positioning reference for the optical element is provided in a part of the substrate, wherein the reference portion on the substrate engages with the optical element to position the substrate with respect to the optical element, wherein the first and second light-emitting elements are arranged in the first direction, wherein the first light-emitting element illuminates an area having high light intensity of the light distribution, wherein the second light-emitting element illuminates an area having low light intensity of the light distribution, and wherein the first light-emitting element is mounted at a position closer to the reference portion in the first direction than the second light-emitting element.