| 摘要 |
PURPOSE: A grant method of an expansion absorption function from a light guide plate unit is provided to put together a synthetic resin light guide plate, a metal frame body, and an optical source part in advance as essential elements, thereby reducing the time and the manpower for carrying and installing in a field. CONSTITUTION: A metal frame body(F) includes four frame members(J). A synthetic resin light guide plate(D) is combined with a combination portion which is one body formed in the inner side of the frame member. An optical source part(L) is installed in the bottom part of the combination portion. A high luminance LED(L1) is serially arranged with a base part and formed the optical source part. Three heat-radiating fins(H) with a heat sink function are installed in the inner side of the metal frame body.
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