| 摘要 |
PROBLEM TO BE SOLVED: To attain downsizing of a substrate without impairing heat radiation performance.SOLUTION: A bending control part 62 for controlling bending of a substrate 2 is provided in a panel 6 at a position opposed to a projected part 20 of the substrate 2. As a result, even if the substrate 2 is bent by heat emitted from an LED 1, it hits the bending control part 62 to control bending (warping) of the substrate 2. Accordingly, since the substrate 2 is screwed at two parts of both ends in longitudinal direction and bending of the substrate 2 is controlled by the bending control part 62, compared with a conventional example as written in a patent document 1 wherein the substrate is fixed by four screws, downsizing of the substrate 2 can be attained without impairing heat radiation performance. |
