Title:
DISCHARGE LAMP LIGHTING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2008/029445
Kind Code:
A1
Abstract:
A discharge lamp light apparatus, which uses the dielectric barrier discharge,
comprises a lighting circuit (20) that applies a high frequency voltage having
a rectangular waveform to a discharge lamp (10) to vary a time ratio of lighting-on
and lighting-off time periods established for the discharge lamp, thereby providing
a modulated light; and an inductive element (30) that is connected in series between
the discharge lamp (10) and the lighting circuit (20) and that has an impedance
value between 200 ohms and 22 kilo-ohms at a frequency of 100 MHz. The inductive
element (30) suppresses the inrush current flowing into the discharge lamp (10)
during providing the modulated light, thereby reducing unwanted radiant noise.
Inventors:
KOMINAMI, Satoshi (())
小南 智 (())
KURACHI, Toshiaki (())
小南 智 (())
KURACHI, Toshiaki (())
Application Number:
JP2006/317518
Publication Date:
March 13, 2008
Filing Date:
September 05, 2006
Export Citation:
Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 5718501, JP)
松下電器産業株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 5718501, JP)
KOMINAMI, Satoshi (())
小南 智 (())
松下電器産業株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 5718501, JP)
KOMINAMI, Satoshi (())
小南 智 (())
International Classes:
H05B41/392; H01J65/00; H05B41/24
Attorney, Agent or Firm:
TANAKA, Mitsuo et al. (AOYAMA & PARTNERS, IMP Building3-7, Shiromi 1-chome,Chuo-ku, Osaka-sh, Osaka 01, 5400001, JP)
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