| 摘要 |
PROBLEM TO BE SOLVED: To provide a lighting device enabled to make a lens member almost uniformly and linearly light by using only two light emitting diodes. SOLUTION: The lighting device comprises an acrylic lens 21 having a linear light emitting surface 24, and a reflection part 22 having saw tooth parts 22a and 22b, and two light emitting diodes 25a and 25b having different light volume from each other, arranged at the outside of the end parts in the longitudinal direction of the acrylic lens 21. The reflection part 22 is formed into V-shape slanting from both end parts in the longitudinal direction of the acrylic lens 21 toward inside, and the bottom part 23 of the V-shaped reflection part 22 is located at the position shifted from the central position of the longitudinal direction of the acrylic lens 21, corresponding with the difference of the light volume of two light emitting diodes 25a and 25b. The distance between the vertices of the saw teeth parts 22a and 22b at light emitting surface 24 side is made to gradually become smaller in proportion as it is headed from both end parts in the longitudinal direction of the acrylic lens 21 toward inside. |
