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US 6,607,290 B2Granted
Tubular light bulb device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTetsuo Matsuba, Makoto Inoue
Life of this patent
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Abstract
A tubular light bulb device includes an arc tube, a lighting circuit for lighting the arc tube, a case housing the lighting circuit and having a base at one end, and a heat-transferring member disposed in the case for conducting heat from a space formed in the case to the base. This allows the tubular light bulb device to discharge heat in the space formed in the case to the outside to reduce temperature of a phosphor film and electronic parts of the lighting circuit, whereby increased life can be obtained.
Claims16
A tubular light bulb device, comprising:
- an arc tube;
- a lighting circuit for lighting the arc tube;
- a case housing the lighting circuit and having a base at one end;
- and
- a heat-transferring member disposed in the case for conducting heat from a space formed in the case to the base.
2 more elements
Dependencies are inferred from the claim text.