| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a luminaire that can suppress temperature rise in an LED chip, and can increase light output. <P>SOLUTION: The luminaire includes a metal luminaire body 100; a metal plate 21 that is joined to the luminaire body 100 and mounts an LED chip 10; and a submount member 30 that is interposed between the LED chip 10 and the metal plate 21, and has insulation properties and heat transfer properties, which relieve stress operating on the LED chip caused by the difference of linear expansion coefficient between the LED chip 10 and the metal plate 21. The luminaire body 100 is joined to the metal plate 21 while irregularities comprising a plurality of recesses 100c provided in parallel on a bottom wall 100a in the luminaire body 100 are fitted to those comprising a plurality of projections 21a provided in parallel on the metal plate 21 irregularly while the luminaire body 100 and the metal plate 21 are being electrically connected so that heat can be transferred. <P>COPYRIGHT: (C)2007,JPO&INPIT |
