JP2012156123A5 - - Google Patents

Claims (8)

A lighting device,
A plurality of LED elements (11) have a light emitting surface arranged in series, and a heat radiating part is formed in a direction opposite to the light emitting surface so as not to transmit light emitted from the LED elements. And a straight tube type LED light source having a translucent cover (12) provided on the light emitting surface side and covering the plurality of LED elements (11),
A reflector (20) provided opposite to the light emitting surface of the straight tube LED light source and reflecting light directly emitted from the straight tube LED light source and directing it in a direction opposite to the light emitting surface; Have
The reflector (20)
A pair of surfaces (21a) that extend in the extending direction of the light emitting surface of the straight tube LED light source and divide the light emitted from the light emitting surface by reflecting the light in different directions; A pair of surfaces are arranged to be inclined with respect to each other, the first reflecting surface (21);
A pair of second reflecting surfaces (22) provided on both outer sides of the first reflecting surface (21), and divided by being reflected by the first reflecting surface (21) A second reflecting surface that reflects light and light directly emitted from the light emitting surface and directs the light in the direction opposite to the light emitting surface of the light source, and is formed by a single or a plurality of planes. A second reflective surface;
Have
The angles formed by the surfaces of the first reflecting surface and the single or plural planes of the second reflecting surface are the angles of the surfaces of the first reflecting surface and the second reflecting surface. The average illuminance of the illumination reflected by a single plane or a plurality of planes and irradiated in the direction opposite to the light emitting surface is directly directed to the straight tube LED light source with the light emitting surface directed in the opposite direction. It is characterized in that it can be set so as to be higher than the average illuminance when irradiated and so that the illuminance variation becomes smaller. The lighting device according to claim 1.
The first reflecting surface is
A convex ridge line (21b) is formed toward the LED element (11) side at a portion where the pair of surfaces (21a) intersect,
The pair of surfaces (21a) form an angle of 60 ° to 120 ° with each other in the vicinity of the ridgeline (21b). The lighting device according to claim 1.
The first reflecting surface (21) has a predetermined width dimension (W2) in a direction perpendicular to the optical axis of each LED element (11) and perpendicular to the parallel arrangement direction of the LED elements (11). And
The distance (D) between the first reflective surface (21) and the straight tube type LED light source is not more than 1 times the predetermined width dimension (W2) of the first reflective surface (21).
Lighting device. The lighting device according to claim 1.
The pair of surfaces (21a) of the first reflection surface (21) is a lighting device. The lighting device according to claim 1.
The center line average roughness of the pair of surfaces (21a) of the first reflecting surface (21) is 0.5 μm or more. The lighting device according to claim 2.
The vicinity of the second reflection surface (22) in the pair of surfaces (21a) of the first reflection surface (21) and the vicinity of the first reflection surface (21) in the second reflection surface (22). An illumination device having an angle between 100 ° and 140 °. The lighting device according to claim 1.
Each of the second reflecting surfaces (22) intersects with the optical axis of each LED element (11) and is arranged in parallel in a direction intersecting with the juxtaposed direction of the LED elements (11). (22a, 22b, 22c, 22d)
The lighting device in which each surface (22a, 22b, 22c, 22d) of each second reflecting surface (22) forms an angle of 155 ° or more with an adjacent surface (22a, 22b, 22c, 22d). The lighting device according to claim 7.
Each surface (22a, 22b, 22c, 22d) in each of the second reflecting surfaces (22) forms an angle of 160 ° or more and 175 ° or less with an adjacent surface (22a, 22b, 22c, 22d). apparatus.