| 摘要 |
<p>PROBLEM TO BE SOLVED: To enhance the visibility of effective lines by causing illuminating light from a light source disposed near a see-through panel body to be reflected by the reflecting surfaces of rib parts, and displaying the effective lines using the rib parts thus made bright. SOLUTION: The see-through panel body 31 comprises a first transparent panel 33A and a second transparent panel 33B longitudinally laid one on top of the other. The first transparent panel 33A is formed with horizontal rib parts 35A, 35B, and 35C which correspond respectively to first, second, and third effective lines L1, L2, and L3. The second transparent panel 33B is formed with a rib part 35D slanted rightwards and a rib part 35E slanted leftwards, which correspond respectively to fourth and fifth effective lines L4 and L5. LED lamps 32 (32a to 32j) pointed to the respective transparent panels 33A and 33B are disposed adjacent to the left side end faces 39 and the right side end faces 40 of the first transparent panel 33A and the second transparent panel 33B, with required vertical intervals between the lamps.</p> |
