Illumination device of vehicle
An illumination device of a vehicle, including: a light source; a bar-shaped light guide member; and a diffusion member having a lens unit, the lens unit having an L-shaped cross-section, and a light-emitting portion and a light-receiving portion, wherein the light guide member has a light-emitting surface, and the light guide member and the lens unit are disposed such that a light-receiving surface of the light-receiving portion of the lens unit is opposed to the light-emitting surface of the light guide member.
1. An illumination device of a vehicle, comprising:
a light source;
a bar-shaped light guide member; and
a diffusion member including a lens unit, the lens unit having an L-shaped cross-section, and a light-emitting portion and a light-receiving portion,
wherein
the light guide member has a flat light-emitting surface and a reflection surface on an opposite side of the light-emitting surface,
the light guide member and the lens unit are disposed such that a light-receiving surface of the light-receiving portion of the lens unit is opposed to the light-emitting surface of the light guide member, and
the light-emitting portion of the lens unit extends from a base portion of the light-receiving portion in a direction opposite to the light guide member and has a light-emitting surface in an end surface thereof.
2. The illumination device of a vehicle as claimed in claim 1 , wherein the diffusion member includes a diffusion material that diffuses light.
3. The illumination device of a vehicle as claimed in claim 1 , wherein the diffusion member has an engagement portion configured to hold the light guide member.
4. The illumination device of a vehicle as claimed in claim 3 , wherein the light guide member has a step portion configured to be engaged with the engagement portion.
5. The illumination device of a vehicle as claimed in claim 1 , wherein the light-emitting portion of the lens unit has a length of not less than 5 mm.
6. The illumination device of a vehicle as claimed in claim 1 , wherein the light-receiving surface of the light-receiving portion of the lens unit is in
close contact with the light-emitting surface of the light guide member with no gap therebetween.
7. The illumination device of a vehicle as claimed in claim 1 , further comprising a decoration panel of a door trim of the vehicle, wherein the decoration panel includes a first decoration member and a second decoration member, and the light-emitting surface of the lens unit is disposed between the first and the second decoration members.
8. The illumination device of a vehicle as claimed in claim 1 , wherein the light guide member has a substantially polygonal cross-section, where the light-emitting surface and a reflection surface opposite to the light-emitting surface are parallel to each other.
9. The illumination device of a vehicle as claimed in claim 8 , wherein the refection surface has grooves arranged at intervals to enhance optical performance of the reflection surface.