Title:
無電極放電ランプ点灯装置、電球形無電極蛍光ランプおよび放電ランプ点灯装置
Document Type and Number:
Japanese Patent JP4134037
Kind Code:
B2
Abstract:
An electrode-less discharge lamp lighting apparatus which is electrically connected to a dimming unit (2) is provided with: an electrode-less fluorescent lamp (3); and a lighting circuit (4) operable to apply a high-frequency voltage to the electrode-less fluorescent lamp(3), wherein the lighting circuit (4) includes: an AC/DC converting unit (5) operable to convert a phase-controlled AC voltage outputted from the dimming unit (2) into a DC voltage; a DC/AC converting unit (6) operable to convert the DC voltage into a high-frequency voltage; and a dimming controlling unit (7) that includes a resistor (29), a switching element (28), and a timer circuit (27) so as to detect a timing of a turn-on of the phase-controlled AC voltage and to, based on the detected timing, allow a current whose value is at least a threshold to flow across output terminals of the AC/DC converting unit (5) for at least a duration of a time lag between the turn-on of the phase-controlled AC voltage and the generation of the high-frequency voltage by the DC/AC converting unit (6).
Inventors:
Kenichiro Takahashi
Satoshi Konan
Koji Miyazaki
Toshiaki Kurachi
Mamoru Takeda
Nobuyoshi Nagata
Satoshi Konan
Koji Miyazaki
Toshiaki Kurachi
Mamoru Takeda
Nobuyoshi Nagata
Application Number:
JP2004535875A
Publication Date:
August 13, 2008
Filing Date:
August 22, 2003
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H05B41/24; H05B41/392; H05B41/28; H05B41/282
Domestic Patent References:
| JP2001523389A | ||||
| JP1138964A | ||||
| JP11111486A | ||||
| JP757886A |
Foreign References:
| EP0827184A2 |
Attorney, Agent or Firm:
Hiromori Arai