JPS5825000U

JPS5825000U - Dimmer circuit for fluorescent lamps

Info

Publication number: JPS5825000U
Application number: JP11764981U
Authority: JP
Inventors: 橋本　美知男
Original assignee: 黒潮商事株式会社; 株式会社アルフア
Priority date: 1981-08-10
Filing date: 1981-08-10
Publication date: 1983-02-17

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はこの考案のけい光灯用調光回路の一実施例の回
路図、第２図は同上けい光灯用調光回路における定電流
回路および調光回路の具体的な構　。成を示す回路図、第３図および第４図はそれぞれ同上定
電流回路および調光回路の他の具体的な実施例の回路図
である。Ａ・・・定電流回路および調光回路、Ｌ・・・安定器、
１・・・けい光灯、Ｆｌ、Ｆ２・・・フィラメント、Ｇ
・・・グローランプ、ＴＲ・・・トライアック、Ｑｌｓ
　Ｑ３・・・トランジスタ、Ｑ２・・−ＰＵＴ、　Ｒ１
・・・半固定抵抗、ｖＲｌ・・・可変抵抗、Ｒ２−Ｒ１
３・・・抵抗、ＺＤ□、ＺＤ２・・・ツェナーダイオニ
ド、Ｄ□〜Ｄ３・・・ダイオード、Ｃ１％Ｃ，・・・コ
ンデンサ、Ｓｅ・・・両波整流回路。FIG. 1 is a circuit diagram of one embodiment of the dimmer circuit for a fluorescent lamp of this invention, and FIG. 2 is a specific structure of a constant current circuit and a dimmer circuit in the dimmer circuit for a fluorescent lamp. FIGS. 3 and 4 are circuit diagrams showing other specific embodiments of the constant current circuit and the dimming circuit, respectively. A... Constant current circuit and dimming circuit, L... Ballast,
1... Fluorescent lamp, Fl, F2... Filament, G
...Glow lamp, TR...Triac, Qls
Q3...Transistor, Q2...-PUT, R1
...Semi-fixed resistance, vRl...Variable resistance, R2-R1
3...Resistor, ZD□, ZD2...Zener dionide, D□~D3...Diode, C1%C,...Capacitor, Se...Double-wave rectifier circuit.

Claims

[Scope of utility model registration request]

A three-terminal AC control element that is connected in series with a fluorescent lamp and an AC power source and dims the fluorescent lamp according to the conduction angle; and a three-terminal AC control element that changes the time constant when dimming the fluorescent lamp. A time constant circuit consisting of a variable resistor and a capacitor that changes the conduction angle, a constant current circuit that is connected in series with this time constant circuit and supplies a constant current, and whose gate is held at a predetermined constant voltage by a Zener diode and whose anode is the capacitor mentioned above. a programmable unijunction transistor that turns on when the gate voltage exceeds the gate voltage and ignites the three-terminal AC control element; A dimmer circuit for a fluorescent lamp comprising a circuit for instantaneously turning on a transistor to conduct the three-terminal AC control element at a zero phase control angle.