| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an illumination device, with little color unevenness and a high luminous efficiency. <P>SOLUTION: On a mounting substrate 10, a plurality of LED chips 20 are mounted separately from each other, and a fluorescent body part 30 is disposed at a periphery of the LED chips 20 and at a space portion between the LED chips 20. Then, at a region of the fluorescent body part 30 covering the space between the LED chips 20, a groove part 41 is provided. Consequently, a light path length of light radiated from the LED chip 20 until it is radiated to outside of the fluorescent body part 30 become substantially equal without depending on a light radiation direction. Therefore, a ratio of light converted into light of a different color by the fluorescent body part 30 and non-converted light becomes substantially uniform without depending on a place, which can therefore suppress color unevenness. Moreover, the periphery of the LED chip 20 is covered by the fluorescent body part 30 without any space therebetween, and thereby light radiated from a side surface of the LED chip 20 also contributes to light emission by being converted into light of a different color by a fluorescent body or otherwise. Therefore, the high luminous efficiency can be provided. <P>COPYRIGHT: (C)2011,JPO&INPIT |
