JPS646399A - Electric discharge lamp lighting device - Google Patents

Electric discharge lamp lighting device

Info

Publication number
JPS646399A
JPS646399A JP7277587A JP7277587A JPS646399A JP S646399 A JPS646399 A JP S646399A JP 7277587 A JP7277587 A JP 7277587A JP 7277587 A JP7277587 A JP 7277587A JP S646399 A JPS646399 A JP S646399A
Authority
JP
Japan
Prior art keywords
discharge lamp
electric discharge
high frequency
transformer
preheating
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
JP7277587A
Other languages
Japanese (ja)
Other versions
JP2617463B2 (en
Inventor
Yuji Nakabayashi
Seinosuke Obara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Meiji National Industrial Co Ltd
Original Assignee
Meiji National Industrial Co Ltd
Matsushita Electric Works Ltd
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 by Meiji National Industrial Co Ltd, Matsushita Electric Works Ltd filed Critical Meiji National Industrial Co Ltd
Priority to JP62072775A priority Critical patent/JP2617463B2/en
Publication of JPS646399A publication Critical patent/JPS646399A/en
Application granted granted Critical
Publication of JP2617463B2 publication Critical patent/JP2617463B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

PURPOSE:To prevent the inflow of an over-current to the output side of a high frequency lighting circuit by connecting a filter circuit which has low impedance to high frequency waves and high impedance to low frequency waves to the output side of a high frequency lighting circuit in series. CONSTITUTION:On the output side of a oscillating transformer 4, a filter circuit 5 (for example condenser) which shows high impedance to commercial frequency and low impedance to high frequency is inserted between a secondary coil and an electric discharge lamp 10. Accordingly, when the electric discharge lamp 10 is lit, the electric discharge lamp 10 lights normally. And at that time, the filaments 11, 12 of the electric discharge lamp 10 is preheated as usual by the commercial frequency preheating voltage of a preheating transformer 20. Further, if both ends of the electric discharge lamp have short-circuited, an over-current tries to flow through the secondary coil of an oscillating transformer 4 by the commercial frequency preheating voltage of the preheating transformer 20, but the over-current is suppressed by the filter circuit 5.
JP62072775A 1987-02-28 1987-03-26 Discharge lamp lighting device Expired - Lifetime JP2617463B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62072775A JP2617463B2 (en) 1987-02-28 1987-03-26 Discharge lamp lighting device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP62-46529 1987-02-28
JP4652987 1987-02-28
JP62072775A JP2617463B2 (en) 1987-02-28 1987-03-26 Discharge lamp lighting device

Publications (2)

Publication Number Publication Date
JPS646399A true JPS646399A (en) 1989-01-10
JP2617463B2 JP2617463B2 (en) 1997-06-04

Family

ID=26386622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62072775A Expired - Lifetime JP2617463B2 (en) 1987-02-28 1987-03-26 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JP2617463B2 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55109298U (en) * 1979-01-29 1980-07-31

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55109298U (en) * 1979-01-29 1980-07-31

Also Published As

Publication number Publication date
JP2617463B2 (en) 1997-06-04

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