Patent ID: 6794801
Filing Date: 2004-09-21
Classification: H01J

Abstract:
A compact self-ballasted fluorescent lamp with dimensions of a total height of 75-105 mm and a maximum diameter of 34-45 mm, comprising:a fluorescent arc tube forming a crooked discharge path; a housing comprised of a first end portion open to be fit thereon with a bulb-base, a middle portion and a second end portion open to be mounted thereto with the fluorescent arc tube; a lighting circuit module accommodated in the housing and constituting a lighting circuit for the fluorescent arc tube, the lighting circuit module provided with a circuit board placed at the second end portion of the housing so as to face the fluorescent arc tube, and two or more circuit components mounted on one side of the circuit board facing inside the housing; and, a thermal conductor having a thermal conductivity of 0.1 W/(mÂ·K) or more, which is filled in the housing in contact with the one side of the circuit board mounting the circuit components of the lighting circuit module thereby covering at least one of the circuit components of the lighting circuit module; wherein the housing has an outer surface of about 5300 mm2 and an outer surface area per unit lamp power of 500 mm2/W or less, except the first end portion.