JPS6476699A - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device

Info

Publication number
JPS6476699A
JPS6476699A JP23139587A JP23139587A JPS6476699A JP S6476699 A JPS6476699 A JP S6476699A JP 23139587 A JP23139587 A JP 23139587A JP 23139587 A JP23139587 A JP 23139587A JP S6476699 A JPS6476699 A JP S6476699A
Authority
JP
Japan
Prior art keywords
discharge lamp
constant
voltage
lamp
inverter
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
JP23139587A
Other languages
Japanese (ja)
Inventor
Yoshihiro Onoda
Isao Yamazaki
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.)
Toshiba Electric Equipment Corp
Original Assignee
Toshiba Electric Equipment Corp
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 Toshiba Electric Equipment Corp filed Critical Toshiba Electric Equipment Corp
Priority to JP23139587A priority Critical patent/JPS6476699A/en
Publication of JPS6476699A publication Critical patent/JPS6476699A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To improve the starting and lighting property of a discharge lamp and prevent the abnormal heating of a switching element by providing a function that sets the load characteristics of an inverter to the constant-voltage and constant-current characteristics when the discharge lamp is normal and prevents the excess input when it is half-wave-discharged. CONSTITUTION:An error amplifier 7 compares the detection voltage and current values of a discharge lamp 2 inputted via an OR circuit 6 with reference values from a reference signal source 8 and negative feedback-controls an inverter 1 in response to the comparison outputs so that the load characteristics are made the constant-voltage and constant-current characteristics. The discharge lamp is thereby started and lit reliably, the lamp current is made constant, and the light output can be stabilized. A control device 9 detects the half-wave discharge occurring at the life terminal state or the like of the discharge lamp 2, increase the lamp voltage detection value of a device 3, and prevents the feed of the excessive power to the discharge lamp 2, i.e., the burning of a switching element caused by the excess input to the inverter.
JP23139587A 1987-09-16 1987-09-16 Discharge lamp lighting device Pending JPS6476699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23139587A JPS6476699A (en) 1987-09-16 1987-09-16 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23139587A JPS6476699A (en) 1987-09-16 1987-09-16 Discharge lamp lighting device

Publications (1)

Publication Number Publication Date
JPS6476699A true JPS6476699A (en) 1989-03-22

Family

ID=16922933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23139587A Pending JPS6476699A (en) 1987-09-16 1987-09-16 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JPS6476699A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03138896A (en) * 1989-10-09 1991-06-13 Siemens Ag Electron auxiliary switching device having inverter composed as switch bridge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03138896A (en) * 1989-10-09 1991-06-13 Siemens Ag Electron auxiliary switching device having inverter composed as switch bridge

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