| 摘要 |
PURPOSE: A lighting device which is used for an elevator power outage is provided to maximize cost down by minimizing the capacity of a battery for an emergency power source and the capacity of an illumination control device. CONSTITUTION: A lens(50) concentrates light which receives from a light source and makes a divergence angle. An external case blocks up the light source not to be leaked out to outside. A side reflective film(70) enhances photonic efficiency by reflecting the light which irradiated in the side from the light source. A top reflective film(71) enhances photonic efficiency by reflecting the light which irradiated in the upper side from the light source. An external case height controller controls the divergence angle and illumination by controlling the height of the external case. |
