Patent ID: 8162508

Claim:
An LED substrate having a rectangular shape on which an LED element is mounted, comprising: counterbored recesses into which anchoring claws provided in a cabinet for supporting the LED substrate are to be fitted, the counterbored recesses being formed at predetermined positions on two sides of the LED substrate facing each other in a first direction; holes through which fixing screws are to be inserted to secure the LED substrate to the cabinet, the fixing screws each having a head portion, an unthreaded neck portion having a diameter smaller than a diameter of the head portion and a threaded shaft portion having a diameter smaller than the diameter of the neck portion; and a substrate connector provided at a predetermined position on at least one of two sides of the LED substrate in a second direction orthogonal to the first direction, the substrate connector connecting the LED substrate to a control circuit for the LED element or another LED substrate, wherein the holes each has an elliptical shape having a major axis larger than the diameter of the head portion and a minor axis smaller than the diameter of the head portion and larger than the diameter of the neck portion, widths of the counterbored recesses in a direction of the major axis of the holes are larger than those of the anchoring claws, and a thickness of the LED substrate is designed so that a boundary position between the neck portion and the head portion is located at a height position equal to a surface of the LED substrate when the fixing screws are inserted through the holes and fastened.