Light source unit for vehicular lighting fixture, and vehicular lighting fixture
A light source unit for a vehicular lighting fixture includes a plurality of light sources, a plurality of lens bodies disposed in front of the plurality of light sources, respectively, a circuit board on which the plurality of light source are mounted, a heatsink configured to radiate heat emitted from the plurality of light sources to outside via a board attachment part to which the circuit board is attached, and a socket body configured integrally with the heatsink and having a connector part electrically connected to the circuit board, and drawing patterns formed by emission of the plurality of light sources are projected toward a road surface by the plurality of lens bodies.
1 . A light source unit for a vehicular lighting fixture comprising:
a plurality of light sources;
a plurality of lens bodies disposed in front of the plurality of light sources, respectively;
a circuit board on which the plurality of light sources are mounted;
a heatsink configured to radiate heat emitted from the plurality of light sources to outside via a board attachment part to which the circuit board is attached; and
a socket body configured integrally with the heatsink and having a connector part electrically connected to the circuit board,
wherein the plurality of light sources are arranged in one direction in a surface of the circuit board,
the plurality of lens bodies are disposed for each of the light sources aligned in the one direction, respectively, in a state distances between the light sources and the lens bodies are different from each other for each of the light sources, and
wherein drawing patterns formed by emission of the plurality of light sources are projected toward a road surface in a forward/rearward direction by the plurality of lens bodies.
2 . The light source unit for a vehicular lighting fixture according to claim 1 , wherein the drawing patterns obtained by reflecting shapes formed by emission of the light sources are projected toward a road surface.
3 . The light source unit for a vehicular lighting fixture according to claim 1 , wherein light gathering power of the plurality of lens bodies becomes relatively higher as the distance between the lens bodies and the light source becomes larger.
4 . The light source unit for a vehicular lighting fixture according to claim 1 , comprising a lens holding part configured to hold the lens body in front of the light source while surrounding the light source.
5 . A vehicular lighting fixture comprising:
the light source unit according to claim 1 ,
a housing in which one side has an opening, and
a transparent lens cover covering the opening of the housing,
wherein the light source unit is detachably attached in a state in which one side of the light source unit is inserted inside of the vehicular lighting fixture from an attachment hole provided in another side of the housing, as an exchangeable coupler socket.
6 . The vehicular lighting fixture according claim 5 , wherein, as a part of back lamps, the light source unit projects the drawing patterns toward the road surface when the vehicle moves rearward.
7 . The vehicular lighting fixture according claim 5 , wherein, as a part of turn lamps, the light source unit projects the drawing patterns.
8 . A road surface projecting light source unit comprising:
a plurality of light sources;
a plurality of lens bodies disposed in front of the plurality of light sources, respectively;
a circuit board on which the plurality of light sources are mounted;
a heatsink configured to radiate heat emitted from the plurality of light sources to outside via a board attachment part to which the circuit board is attached;
a socket body configured integrally with the heatsink and having a connector part electrically connected to the circuit board; and
a filter that is disposed between at least one of the light sources and the lens bodies and that has a transmissive area through which light emitted from the light sources passes,
wherein drawing patterns, which includes drawing patterns obtained by reflecting a shape of the transmissive area, formed by emission of the plurality of light sources are projected toward a road surface by the plurality of lens bodies.