| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting diode lighting device capable of preventing short life of a light-emitting diode element caused by heat generation and securing a light-emitting condition of the light-emitting diode lighting device, which hardly generates an odd feeling even in use at home. <P>SOLUTION: Impedance changes of light-emitting diode modules 52 at a central zone 50 and light-emitting diode modules 62 at a first circular zone 60 tend to be enlarged. Influence of heat generation can be dispersed since a plurality of light-emitting diode modules are connected in parallel at the central zone 50, the first circular zone 60 , and a second circular zone 70. The imposed current of respective constant current diodes D can be lessened since constant current control element is constituted of a plurality of constant current diodes D connected in parallel, and capability of allowing conditions for the light-emitting diode element can be increased. <P>COPYRIGHT: (C)2009,JPO&INPIT |
