| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting fixture having a structure which can control light distribution characteristics while suppressing glare and whole luminous flux deterioration, and can change irradiation range simply only by exchanging a diffusion sheet. <P>SOLUTION: The lighting fixture is provided with a reflecting plate 1 having a concave portion 1a, a light source 2 arranged at the bottom part of the concave portion 1a of the reflecting plate 1, and a diffusion sheet 3 which is arranged at the light emitting region of the reflecting plate 1 and has a concavo-convex structure 3a formed on the surface. The diffusion sheet 3 has an incident surface to receive incident light from the light source 2 and a light outgoing surface to emit light from the light source 2, and has a portion in which the region of the incident surface where the intensity of incident light from the light source becomes maximum overlaps with the region of the diffusion sheet 3 where the diffusion angle becomes maximum. <P>COPYRIGHT: (C)2011,JPO&INPIT |
