JPS5477476A - Fluorescent lamp lighting apparatus - Google Patents

Fluorescent lamp lighting apparatus

Info

Publication number
JPS5477476A
JPS5477476A JP14537377A JP14537377A JPS5477476A JP S5477476 A JPS5477476 A JP S5477476A JP 14537377 A JP14537377 A JP 14537377A JP 14537377 A JP14537377 A JP 14537377A JP S5477476 A JPS5477476 A JP S5477476A
Authority
JP
Japan
Prior art keywords
switching element
energized
power source
fluorescent lamp
trigger signal
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
JP14537377A
Other languages
Japanese (ja)
Inventor
Koji Nishimura
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
Original Assignee
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP14537377A priority Critical patent/JPS5477476A/en
Publication of JPS5477476A publication Critical patent/JPS5477476A/en
Pending legal-status Critical Current

Links

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

PURPOSE: To provide a fluorescent lamp lighting apparatus, in which fluorescent lamp is pre-heated sufficiently at the time of starting by energizing a switching element at the 90° point of each half cycle of AC power source for a certain time period after the AC power source is connected, whereby cold cathode disharge can be prevented.
CONSTITUTION: When power source 1 is connected, a voltage-responsive switch 13 is turned ON at about 90° point of each half cycle of AC power source, in the OFF-period of transistor 17 that is determined by resistances 15, 18 and capacitor 19, whereby trigger signal for switching element 5 is produced and thus element 5 is energized. When the switching element 5 is energized, a phase-advancing current begins to be passed through inductance element 2 and capacitor 3, but it becomes almost zero at the time when the trigger signal for switching element 5 is produced, so that element 5 tends to be turned OFF. However, since the next trigger signal is applied to the gate of switching element 5, phase-advancing current again begins to be passed, so that switch 5 is energized completely. Thus, filaments f1, f2 are pre-heated sufficiently in a time period when transistor 17 is not energized.
COPYRIGHT: (C)1979,JPO&Japio
JP14537377A 1977-11-30 1977-11-30 Fluorescent lamp lighting apparatus Pending JPS5477476A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14537377A JPS5477476A (en) 1977-11-30 1977-11-30 Fluorescent lamp lighting apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14537377A JPS5477476A (en) 1977-11-30 1977-11-30 Fluorescent lamp lighting apparatus

Publications (1)

Publication Number Publication Date
JPS5477476A true JPS5477476A (en) 1979-06-20

Family

ID=15383713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14537377A Pending JPS5477476A (en) 1977-11-30 1977-11-30 Fluorescent lamp lighting apparatus

Country Status (1)

Country Link
JP (1) JPS5477476A (en)

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