Patent ID: 6642671
Filing Date: 2003-11-04
Classification: H05B,Y02B

Abstract:
An electrodeless discharge lamp, comprising:a bulb filled with discharge gas; an induction coil for generating an electromagnetic field in the bulb; a power supply circuit which includes a plurality of electric components and which supplies electric power to the induction coil; a case for accommodating the plurality of electric components, the case having a surface which faces an external element of the electrodeless discharge lamp; a stick-shaped heat conducting member placed along a winding axis of the induction coil; a first planar heat conducting member placed so as to be perpendicular to the winding axis, the first heat conducting member being thermally connected to the stick-shaped heat conducting member; a second heat conducting member thermally connected to the first heat conducting member; and a third heat conducting member for thermally connecting at least two of the plurality of electric components, wherein the second heat conducting member is thermally connected to the case, and the thermal conductivity of the first heat conducting member is lower than the thermal conductivity of the stick-shaped heat conducting member and the thermal conductivity of the second heat conducting member.