| 摘要 |
PROBLEM TO BE SOLVED: To aim to control discomfortable glare more than a conventional case.SOLUTION: As for a light-emitting device, a plurality of louvers 53 are formed integrally with a cover 5. The louvers 53 are formed in a truncated pyramid shape of which width becomes narrow toward a light source part 1 when viewed from a short-length direction of the cover 5. That is, when the louvers are constructed of a thin plate having a uniform thickness, light reflected on the surface of the louvers is irradiated on the lighting space to enter a glare zone and it is possible that a control effect of discomfortable glare is degraded. On the other hand, in this embodiment, since the width (thickness) of the louvers 53 becomes gradually narrow toward the light source part 1, even if light reflected on the surface of the louvers 53 is irradiated on the lighting space, it hardly enters the glare zone, thereby, discomfortable glare can be controlled. |
