| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting device capable of emitting a light that color temperature thereof changes precisely according to a predetermined trajectory with a simple structure. <P>SOLUTION: A light-emitting device comprises: a light-emitting section 2 mounted on a wiring board 1; a cylinder section 3 which is made up of an inner cylinder 31 storing the wiring board 1 inside and an outer cylinder 32 storing the inner cylinder 31 inside and which has a filling space 33 formed between the outer periphery of the inner cylinder 31 and the inner periphery of the outer cylinder 32; a movable knob 5 that rotates the cylinder 3 in circumferential direction; and a color temperature conversion section 4 formed by filling the filling space 33 with a color temperature conversion member including one type of phosphor that emits a light by a light emitted from the light-emitting section 2 at a predetermined color temperature. The color temperature conversion section 4 comprises first, second and third color temperature conversion sections 4a-4c that have each different phosphor density in the circumferential direction of the cylinder section 3. The first, second and third color temperature conversion sections 4a-4c convert the color temperature of the light emitted from the light-emitting section 2 to the color temperature close to a blackbody locus. <P>COPYRIGHT: (C)2012,JPO&INPIT |
