| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an LED light source device so made to have light irradiated from a center axis as light from each LED is superbly mixed, even in case a plurality of LED elements are arranged around the center axis for brightness improvement and any number of LEDs are lit. <P>SOLUTION: The LED (light-emitting diode) light source device 1 is provided with a light-emitting diode group 2 consisting of a plurality of light-emitting diode elements, a light-shielding member 4 with a light-irradiation opening 4c formed, a housing 3, an optical reflecting plate 5 covering an open end part 3f of the housing 3 and having a central reflecting part 5A of high reflectance and low transmittance at an area opposed to the light-irradiation opening 4c as well as an outside reflecting part 5B with a reflectance gradually lowered and a transmittance increased from the surrounding of the central reflecting part 5A outward. The light-irradiation opening 4c is so formed that the light-shielding member 4 is to cover at least a part of an emission area of each of the plurality of light-emitting diode elements in planar view. <P>COPYRIGHT: (C)2012,JPO&INPIT |
