Patent ID: 7290906

Claim:
A lamp device, comprising: a plurality of LED lamps capable of emitting light; and an optical guide path extending from adjacent said LED lamps, the optical guide path including a high-refractivity material portion, a direction change structure configured to change the direction of light emitted from said LED lamps into an irradiation direction, and a light distribution pattern formation structure configured to impart an appropriate light distribution pattern to light radiated in said irradiation direction, wherein said direction change structure includes a first reflecting surface and a second reflecting surface, the first and second reflecting surfaces being located so as to provide inner reflection at an interface between the high-refractivity material portion and atmosphere, the first reflecting surface extending continuously and substantially parallel to an imaginary line connecting the plurality of LED lamps such that light from each of the plurality of LED lamps is reflected by the first reflecting surface, and the second reflecting surface extending continuously and substantially parallel to the imaginary line connecting the plurality of LED lamps, and said light distribution pattern formation device includes a diffusion lens, said lens being located at an interface between the high-refractivity material portion and atmosphere.