Patent ID: 9557631
Date: 2017-01-31
CPC Classifications: F21V,G03B

Claim:
1. A light source unit, comprising: a plurality of light emitting elements disposed with a dispersed pattern in a two-dimensional direction to together form a light emitting element assembly, the light emitting element assembly being configured to emit light to a target; a light emitting element supporter disposed rearward of the plurality of light emitting elements in a light emitting direction, the light emitting element supporter being configured to support the plurality of light emitting elements of the light emitting element assembly; a light return member, having an opening therein, disposed outside of the light emitting element supporter and at a position facing a light emitting side of the light emitting element assembly while setting a space with the light emitting element supporter, and configured to return light emitted from the light emitting element assembly toward at an inner side of two dimensional direction of the light emitting element assembly; an air supply unit disposed rearward of the light emitting element supporter in the light emitting direction; and a flow path defining member that connects the air supply unit and the light return member, the flow path defining member having a curved shape that encases at least a portion of the light emitting element assembly, wherein cooling air supplied from the air supply unit passes through a flow path defined by a wall of the flow path defining member and a surface of the light emitting element assembly into the space formed by the light return member with the light emitting element supporter, and wherein the light emitting element supporter has a rear side facing the air supply unit.