JPS6433192U - - Google Patents

Info

Publication number
JPS6433192U
JPS6433192U JP12875987U JP12875987U JPS6433192U JP S6433192 U JPS6433192 U JP S6433192U JP 12875987 U JP12875987 U JP 12875987U JP 12875987 U JP12875987 U JP 12875987U JP S6433192 U JPS6433192 U JP S6433192U
Authority
JP
Japan
Prior art keywords
lamp
current
lamp lighting
circuit
fluorescent lamp
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.)
Granted
Application number
JP12875987U
Other languages
Japanese (ja)
Other versions
JPH0539599Y2 (en
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 JP12875987U priority Critical patent/JPH0539599Y2/ja
Publication of JPS6433192U publication Critical patent/JPS6433192U/ja
Application granted granted Critical
Publication of JPH0539599Y2 publication Critical patent/JPH0539599Y2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Circuit Arrangements For Discharge Lamps (AREA)

Description

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

第1図は本考案点灯装置の基本回路ブロツク図
、第2図は本考案点灯装置の具体的回路例を示す
点灯回路図、第3図は第2図回路におけるランプ
点灯正常時と不正常時でのランプ電流波形図であ
る。第4図は従来の蛍光ランプ点灯装置の回路ブ
ロツク図である。 9…電源、11…ランプ点灯回路、12…蛍光
ランプ、13…電流検出手段、14…スイツチン
グ回路。
Figure 1 is a basic circuit block diagram of the lighting device of the present invention, Figure 2 is a lighting circuit diagram showing a specific circuit example of the lighting device of the present invention, and Figure 3 is the circuit shown in Figure 2 during normal and abnormal lamp lighting. It is a lamp current waveform diagram at . FIG. 4 is a circuit block diagram of a conventional fluorescent lamp lighting device. 9... Power supply, 11... Lamp lighting circuit, 12... Fluorescent lamp, 13... Current detection means, 14... Switching circuit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電源の投入で熱陰極型蛍光ランプを点灯させる
ランプ点灯回路に、蛍光ランプの電極に流れる電
流を検出する電流検出手段、及びこの電流検出手
段で検出した電流が通常のランプ点灯時の電流を
越える所定値以上で、所定時間以上流れると駆動
して、前記ランプ点灯回路のランプ点灯動作を次
の電源投入時まで停止させるスイツチング回路を
有する点灯装置保護回路を組み込んだことを特徴
とする蛍光ランプ点灯装置。
A lamp lighting circuit that lights a hot cathode fluorescent lamp when the power is turned on includes a current detection means for detecting the current flowing through the electrodes of the fluorescent lamp, and a current detected by this current detection means that exceeds the current when the lamp is lit normally. A fluorescent lamp lighting device incorporating a lighting device protection circuit having a switching circuit that is activated when the voltage exceeds a predetermined value and flows for a predetermined time period to stop the lamp lighting operation of the lamp lighting circuit until the next power is turned on. Device.
JP12875987U 1987-08-24 1987-08-24 Expired - Lifetime JPH0539599Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12875987U JPH0539599Y2 (en) 1987-08-24 1987-08-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12875987U JPH0539599Y2 (en) 1987-08-24 1987-08-24

Publications (2)

Publication Number Publication Date
JPS6433192U true JPS6433192U (en) 1989-03-01
JPH0539599Y2 JPH0539599Y2 (en) 1993-10-07

Family

ID=31382397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12875987U Expired - Lifetime JPH0539599Y2 (en) 1987-08-24 1987-08-24

Country Status (1)

Country Link
JP (1) JPH0539599Y2 (en)

Also Published As

Publication number Publication date
JPH0539599Y2 (en) 1993-10-07

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