Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yasushi Kambara0
Akira Motoyama0
Masayuki Nakajima0
Date of Patent
February 23, 2010
0Patent Application Number
105800710
Date Filed
December 15, 2004
0Patent Primary Examiner
Patent abstract
A lighting device for a lamp device is provided. The lighting device includes a circuit board and film capacitors packaged on the circuit board by using leadless flow solders. Each film capacitor comprises polypropylene films and lead wires, and a material of the lead wires has a thermal conductivity lower than a thermal conductivity of copper, and terminals and internal materials of the film capacitors are leadless. A diameter of the lead wires is 0.6− (mm) or less, a cross-sectional area is 35 mm2 or less, and a temperature at a terminal end of the lead wires in the film capacitors during a soldering process is 130° C. or less.
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