Illumination device
According to one embodiment, an illumination device includes a light source module including a plurality of light sources, and a reflector opposed to the light source module. The reflector includes a plurality of incidence openings on which light from the light sources is made incident, a plurality of emission openings opposed to the incidence openings, and a plurality of reflective surfaces extending from the incidence openings to the emission openings, respectively. Each of the reflective surfaces is formed by combining a plurality of curved surfaces arranged in an optical axis direction of the light sources.
1. An illumination device, comprising:
a light source module comprising a plurality of light sources; and
a reflector opposed to the light source module,
wherein
the reflector comprises a plurality of incidence openings on which light from the light sources is made incident, a plurality of emission openings opposed to the incidence openings, and a plurality of reflective surfaces extending from the incidence openings to the emission openings, respectively, and
each of the reflective surfaces is formed by combining a plurality of curved surfaces arranged in an optical axis direction of the light sources,
each of the reflective surfaces comprises a first curved surface which is convex to an optical axis of one of the light sources and a second curved surface which is concave to the optical axis of the light source.
2. The illumination device of claim 1 , wherein
each of the emission openings has a rectangular shape with four sides, and the reflective surfaces include four reflective surfaces connected to four sides of the emission opening.
3. The illumination device of claim 1 , wherein the first curved surface and the second curved surface have radii of curvature different from each other.
4. The illumination device of claim 1 , wherein
the light source module comprises a circuit board opposed to the reflector, a plurality of light sources mounted on the circuit board, and an elastic sheet placed on the circuit board, and
the reflector is provided on the circuit board via the elastic sheet.
5. The illumination device of claim 1 , wherein
the reflector comprises an outer wall shaped in a rectangular frame, a plurality of partition walls provided in the outer wall to mutually intersect and extend, and an emission surface, and
each of the emission openings is defined by the outer wall and the partition walls and opens to the emission surface.
6. The illumination device of claim 5 , wherein
the reflective surfaces are formed by an inner surface of the outer wall and surfaces of the partition walls.
7. The illumination device of claim 5 , wherein
the reflector includes a plurality of recess portions formed on the outer wall and the partition walls, at corner portions of each of the emission openings.