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Image Number 10 for United States Patent #7780306.
A light guide plate is provided. The light guide plate includes a light source hole part configured to accommodate a light source, the light source hole part provided at a back surface on the opposite side of a light emitting surface; and a recessed part provided on the side of said light emitting surface opposed to the light source hole part. The recessed part has, at the bottom portion of the recessed part, a slant surface inclined against the light emitting surface.
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