Title:
COMPACT FLUORESCENT LAMP
Document Type and Number:
WIPO Patent Application WO/2008/018558
Kind Code:
A1
Abstract:
A compact fluorescent lamp not inviting an increase of the size of the chalk coil
and leading to power saving. A compact fluorescent lamp comprises a luminescent
tube having a glass tube constituting a one electric discharge path and electrodes
sealed in both ends of the glass tube and an operating unit for operating the luminescent
tube. The operating unit has a rectifying/smoothing circuit, an inverter circuit
for switching the output from the rectifying/smoothing circuit and applying
high-frequency power to the luminescent tube, and a resonance circuit using
a chalk coil connected in series to the luminescent tube so as to permit the luminescent
tube to emit light with a luminance almost equal to that of 60W incandescent lamp.
The impedance of the luminescent tube during the normal operation is set in a
range from 1.0 kΩ to 3.0 kΩ. The chalk coil is formed of a copper wire
having a cross section of from 0.02 mm2 to 0.03 mm2.
Inventors:
TSUNETO YUJI
GYOTEN MASAYOSHI
GYOTEN MASAYOSHI
Application Number:
PCT/JP2007/065649
Publication Date:
February 14, 2008
Filing Date:
August 09, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
TSUNETO YUJI
GYOTEN MASAYOSHI
TSUNETO YUJI
GYOTEN MASAYOSHI
International Classes:
H05B41/24; F21S2/00; F21V23/02; H01F27/28; H05B41/02; F21Y103/02
Foreign References:
| JP2003007483A | 2003-01-10 | |||
| JP2003263972A | 2003-09-19 | |||
| JP2005243464A | 2005-09-08 | |||
| JP2003086386A | 2003-03-20 | |||
| JPH11283413A | 1999-10-15 |
Attorney, Agent or Firm:
NAKAJIMA, Shiro et al. (2-1 Toyosaki 3-chome,Kita-ku, Osaka-sh, Osaka 72, JP)
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