| 摘要 |
PROBLEM TO BE SOLVED: To provide an internally illuminated bulletin device that has a compact structure and illuminates a display surface with a uniform illumination light without causing luminance unevenness. SOLUTION: In the bulletin device, translucent display plates (3 and 3) are installed in both openings (21 and 21) of a box-shaped housing (2) having the openings (21 and 21) in the front part and rear part, a linear light source (4) where a plurality of LEDs (42) are arranged in line is installed on the ceiling part of the housing (2), and a light diffusing lens (5) molded in a band shape is installed under the linear light source (4). Light radiated downward from the linear light source (4) is condensed uniformly and radiated to the whole display surfaces of both translucent display plates (3 and 3) by the light diffusing lens (5). COPYRIGHT: (C)2011,JPO&INPIT |
