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JPS6482494A - Lighting device with dimming function - Google Patents

Lighting device with dimming function

Info

Publication number
JPS6482494A
JPS6482494A JP23938587A JP23938587A JPS6482494A JP S6482494 A JPS6482494 A JP S6482494A JP 23938587 A JP23938587 A JP 23938587A JP 23938587 A JP23938587 A JP 23938587A JP S6482494 A JPS6482494 A JP S6482494A
Authority
JP
Japan
Prior art keywords
output voltage
switching regulator
signal
flicker
comparator
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
JP23938587A
Other languages
Japanese (ja)
Inventor
Akiyoshi Shinkawa
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric 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 Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP23938587A priority Critical patent/JPS6482494A/en
Publication of JPS6482494A publication Critical patent/JPS6482494A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To allow the stable dimming down to the low-brightness region by comparing the brightness signal with the warning reference value set to the value before the occurrence of the flicker of a fluorescent lamp and adjusting the output voltage of a switching regulator. CONSTITUTION:A comparator 6 compares the brightness signal Vs with the warning reference value Vr set to the value before the occurrence of the flicker of a fluorescent lamp 2, the signal to adjust the output voltage for the feedback signal of a switching regulator 4 is generated by an output voltage regulating circuit 7 provided between a switching regulator 4 and an inverter 6 based on the output of this comparator 6, thus the final adjusting output voltage from the switching regulator 4 is obtained. The dimming range can be thereby expanded without reducing the efficiency of the inverter or increasing the noise.
JP23938587A 1987-09-24 1987-09-24 Lighting device with dimming function Pending JPS6482494A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23938587A JPS6482494A (en) 1987-09-24 1987-09-24 Lighting device with dimming function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23938587A JPS6482494A (en) 1987-09-24 1987-09-24 Lighting device with dimming function

Publications (1)

Publication Number Publication Date
JPS6482494A true JPS6482494A (en) 1989-03-28

Family

ID=17043997

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23938587A Pending JPS6482494A (en) 1987-09-24 1987-09-24 Lighting device with dimming function

Country Status (1)

Country Link
JP (1) JPS6482494A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0492399U (en) * 1990-12-28 1992-08-11

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0492399U (en) * 1990-12-28 1992-08-11

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