JPH0249097U - - Google Patents

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Publication number
JPH0249097U
JPH0249097U JP12728888U JP12728888U JPH0249097U JP H0249097 U JPH0249097 U JP H0249097U JP 12728888 U JP12728888 U JP 12728888U JP 12728888 U JP12728888 U JP 12728888U JP H0249097 U JPH0249097 U JP H0249097U
Authority
JP
Japan
Prior art keywords
frequency
circuit
output
low
frequency transformer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12728888U
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP12728888U priority Critical patent/JPH0249097U/ja
Publication of JPH0249097U publication Critical patent/JPH0249097U/ja
Pending legal-status Critical Current

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  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案に係る低圧放電ランプ点灯装置
の一例を示す説明図、第２図〜第６図はそれぞれ
本考案に係る低圧放電ランプ点灯装置の他の例を
示す説明図である。 ＤＣ……直流電源、ＳＷ……電源スイツチ、１
０……高周波点灯回路、１１……発振部、Ｔ……
高周波トランス、２０……放電回路、３０……予
熱回路、４０……周波数変換回路、５０……共振
回路、６０……共振回路、Ｌ……低圧放電ランプ
、Ｆ……フイラメント電極。 FIG. 1 is an explanatory diagram showing one example of a low-pressure discharge lamp lighting device according to the present invention, and FIGS. 2 to 6 are explanatory diagrams showing other examples of the low-pressure discharge lamp lighting device according to the present invention, respectively. DC...Direct current power supply, SW...Power switch, 1
0... High frequency lighting circuit, 11... Oscillator section, T...
High frequency transformer, 20...Discharge circuit, 30...Preheating circuit, 40...Frequency conversion circuit, 50...Resonance circuit, 60...Resonance circuit, L...Low pressure discharge lamp, F...Filament electrode.

Claims (1)

【実用新案登録請求の範囲】 (1) 両端にフイラメント電極を備えてなる低圧
放電ランプを点灯するための低圧放電ランプ点灯
装置において、 高周波トランスを含む高周波点灯回路と、 前記高周波トランスのメイン出力端子間に接続
された、低圧放電ランプを放電させて定常点灯さ
せる放電回路と、 共振回路を有し、前記高周波トランスのサブ出
力端子間に接続された、少なくとも一方のフイラ
メント電極に予熱電流を流す予熱回路と、 点灯起動時には前記高周波トランスの出力周波
数を第１周波数に変換し、予熱時間経過後には前
記高周波トランスの出力周波数を第２周波数に変
換する周波数変換回路とを備え、 前記予熱回路の共振回路は、前記高周波トラン
スの出力周波数が前記第１周波数に変換されたと
きにはフイラメント電極に予熱電流を流し、前記
高周波トランスの出力周波数が前記第２周波数に
変換されたときには予熱電流を実質上流さないイ
ンピーダンス特性を有することを特徴とする低圧
放電ランプ点灯装置。 (2) 放電回路が共振回路を有し、当該共振回路
は、高周波トランスの出力周波数が第１周波数に
変換されたときにはフイラメント電極間に放電電
流を実質上流さず、高周波トランスの出力周波数
が第２周波数に変換されたときにはフイラメント
電極間に放電電流を流すインピーダンス特性を有
することを特徴とする請求項１に記載の低圧放電
ランプ点灯装置。[Claims for Utility Model Registration] (1) A low-pressure discharge lamp lighting device for lighting a low-pressure discharge lamp comprising filament electrodes at both ends, comprising: a high-frequency lighting circuit including a high-frequency transformer; and a main output terminal of the high-frequency transformer. a discharge circuit that discharges a low-pressure discharge lamp and lights it steadily; and a preheater that has a resonant circuit and that supplies a preheating current to at least one filament electrode that is connected between the sub-output terminals of the high-frequency transformer. circuit, and a frequency conversion circuit that converts the output frequency of the high-frequency transformer to a first frequency when starting the lighting, and converts the output frequency of the high-frequency transformer to a second frequency after a preheating time has elapsed, The circuit causes a preheating current to flow through the filament electrode when the output frequency of the high frequency transformer is converted to the first frequency, and does not substantially upstream the preheating current when the output frequency of the high frequency transformer is converted to the second frequency. A low-pressure discharge lamp lighting device characterized by having impedance characteristics. (2) The discharge circuit has a resonant circuit, and the resonant circuit does not substantially flow the discharge current between the filament electrodes when the output frequency of the high-frequency transformer is converted to the first frequency, and the output frequency of the high-frequency transformer is changed to the first frequency. The low-pressure discharge lamp lighting device according to claim 1, having an impedance characteristic that causes a discharge current to flow between the filament electrodes when converted to two frequencies.
JP12728888U 1988-09-30 1988-09-30 Pending JPH0249097U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12728888U JPH0249097U (en) 1988-09-30 1988-09-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12728888U JPH0249097U (en) 1988-09-30 1988-09-30

Publications (1)

Publication Number Publication Date
JPH0249097U true JPH0249097U (en) 1990-04-05

Family

ID=31379585

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12728888U Pending JPH0249097U (en) 1988-09-30 1988-09-30

Country Status (1)

Country Link
JP (1) JPH0249097U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003168583A (en) * 2001-11-30 2003-06-13 Matsushita Electric Works Ltd Discharge lamp lighting device
JP2008262871A (en) * 2007-04-13 2008-10-30 Matsushita Electric Works Ltd Discharge lamp lighting device, lighting system using it, and liquid crystal display device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003168583A (en) * 2001-11-30 2003-06-13 Matsushita Electric Works Ltd Discharge lamp lighting device
JP2008262871A (en) * 2007-04-13 2008-10-30 Matsushita Electric Works Ltd Discharge lamp lighting device, lighting system using it, and liquid crystal display device

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