| 摘要 |
PROBLEM TO BE SOLVED: To provide an unconventional inside lighting type signboard which takes advantage of characteristics of a high luminance LED. SOLUTION: The inside lighting type signboard is provided with a light source 2, a supporting body 4 which supports the light source 2 in a casing 1, a current control circuit 5 which is electrically connected with the light source 2, and a light dispersing member 6 which disperses light of the light source. The light source 2 is composed of a plurality of high luminance LEDs 20 and is electrically connected with an electric source 3. The light dispersing member is disposed between the plurality of high luminance LEDs 20 and an advertisement surface. The supporting body 4 is provided with a heat sink which can be housed within the casing 1. The heat sink retains the plurality of high luminance LEDs 20 which are spaced at intervals away from each other. The current control circuit 5 controls the current flowing through the high luminance LEDs 20 so as to maintain the current at a prescribed value. COPYRIGHT: (C)2007,JPO&INPIT
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