| 摘要 |
PURPOSE:To distribute bright light in a desired direction, so as to improve lighting efficiency by arranging the light of a tubular light source from a reflection plate through a multiple light guide in a predetermined direction. CONSTITUTION:A plurality of translucent plates P are formed into a multiple light guide 4b, while one side end surface of each translucent plate P is aligned to one surface, and a fixed point in the middle between the one surface and the other side surface is bent into a desired form. The length of each translucent plate P of the other side surface is elongated in order from the upper side to the lower side, and is thus tilted in a random manner. When a switch 6 is pushed, a fluorescent lamp 4a is lighted, and all the light is converged and thus projected on an end surface (a) of one surface of the light guide 4b by a reflection surface Sa of a storing part 2a of a board seat 2A. The light is guided in the translucent plate P without generating diffusion loss, and is uniformly projected from the side end of the translucent plate P into a reflection plate 4c. The light has directivity on light receiving surfaces uniformly from reflection surfaces S1-S5, and is reflected in a surface emission condition. Bright light is arranged in a desired direction, and lighting is thus carried out efficiently. |
