| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lighting device having a round projection-type light distribution pattern wherein a luminous intensity distribution becomes high at a central section and lower toward a periphery, in a lamp using a plurality of light sources. <P>SOLUTION: The lighting device can be realized in a structure having a function capable of concentrating directions of the plurality of light sources at the central section of the lamp and irradiating the plurality of light sources in front of the lamp. For that reason, the lighting device is to be a light-concentrating device having a function capable of collecting light of respective light sources in one direction, and to be a central irradiation device having functions of irradiating the light of the plurality of light sources ahead by setting an irradiation direction of the plurality of light sources at the center of the lamp, making the projection-type light distribution pattern in a round shape irrespective of shapes of the light sources, and setting light of the light sources as irradiating light with a designated extended angle. <P>COPYRIGHT: (C)2013,JPO&INPIT |
