Patent ID: 8106568

Claim:
A lighting device comprising: a plurality of light-emitting elements, which are arranged at different angles inside the lighting device and project light beams that converge at an incidence focusing spot located within a range of the light emitting device and that overlap each other to cover a light incidence area; an incidence focusing spot, which is formed by the projection of light beams from the plurality of light-emitting elements; a heat dissipation unit, which comprises a structure forming a plurality of surfaces at different angles with respect to the incidence focusing spot for mounting the plurality of light-emitting elements and functioning to dissipate and transmit heat generated by the light-emitting elements; and a light-transmitting hood, which is set at in front of the light-emitting elements in a direction of light emission and has an inside surface located immediately in front of the incidence focusing spot, a light diffusion layer being formed on an outside light-exit surface or the inside light incident surface of hood to realize light refraction and diffraction and make a light exit area showing an output resembling a surface source.