JPH0472498U

JPH0472498U -

Info

Publication number: JPH0472498U
Application number: JP11512990U
Authority: JP
Priority date: 1990-10-31
Filing date: 1990-10-31
Publication date: 1992-06-25

Description

【図面の簡単な説明】第１図ａ，ｂはそれぞれ本考案の第１の実施例
のブロツク図及び集積回路部の回路図、第２図及
び第３図はそれぞれ本考案の第２及び第３の実施
例の集積回路部の回路図、第４図及び第５図は従
来のインバータ蛍光灯の第１の例のブロツク図及
びこの例の動作を説明するための駆動回路の動作
タイミング図、第６図は従来のインバータ蛍光灯
の第２の例のブロツク図である。１……スイツチ回路、２……ＡＣ−ＤＣコンバ
ータ、３Ａ〜３Ｅ……波形整形回路、４，４Ａ〜
４Ｃ……集積回路部、５……パワートランジスタ
、６……蛍光灯回路、７……保安灯、８，８Ａ…
…タイマ回路、９，９Ａ……駆動回路、４１……
基本発振回路、４２，４２Ａ……分周回路、４３
，４３Ａ……選択回路、４４……タイマ回路、４
５……選択回路、４６……調光入力処理回路、４
７……出力回路、Ｇ１〜Ｇ６……ＡＮＤ回路、Ｖ
Ｒ１……半固定可変抵抗器。[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1a and 1b are a block diagram and a circuit diagram of an integrated circuit section of a first embodiment of the present invention, respectively, and FIGS. 2 and 3 are a circuit diagram of a second embodiment of the present invention, respectively. FIGS. 4 and 5 are a block diagram of a first example of a conventional inverter fluorescent lamp and an operation timing diagram of a drive circuit for explaining the operation of this example; FIGS. FIG. 6 is a block diagram of a second example of a conventional inverter fluorescent lamp. 1...Switch circuit, 2...AC-DC converter, 3A~3E...Waveform shaping circuit, 4,4A~
4C...Integrated circuit section, 5...Power transistor, 6...Fluorescent lamp circuit, 7...Security light, 8,8A...
...Timer circuit, 9,9A...Drive circuit, 41...
Basic oscillation circuit, 42, 42A... Frequency division circuit, 43
, 43A... selection circuit, 44... timer circuit, 4
5... Selection circuit, 46... Dimming input processing circuit, 4
7...Output circuit, G1 to G6...AND circuit, V
R1...Semi-fixed variable resistor.

Claims

[Claims for Utility Model Registration] 1. A switch circuit that turns on and off the input AC commercial power, transmits the AC commercial power to the output end when it is on, and sets the dimming ratio, and this switch circuit A waveform shaping circuit that is provided corresponding to the dimming ratio other than the set 100% dimming ratio and that shapes and outputs the waveform of the AC commercial power source from the switch circuit, and a basic waveform shaping circuit that outputs a pulse signal of the fundamental frequency. an oscillation circuit, a frequency dividing circuit that divides the pulse signal at a plurality of different frequency division ratios and outputs a plurality of divided pulse signals, and each selects one of the plurality of frequency divided pulse signals and generates a preheating pulse. signal, a 100% dimming pulse signal, and at least one
a first selection circuit that outputs a pulse signal for each dimming ratio, and a timer circuit that outputs a plurality of timer pulse signals that sequentially become active level for a predetermined period when the AC commercial power source is turned on by the switch circuit; A timer pulse signal having at least the first period among the plurality of timer pulse signals is selected as a preheating timer pulse signal, and at least one of the preheating timer signals following the selected timer pulse signal is selected to perform 100% dimming. A second timer pulse signal is output as a timer pulse signal, and a second timer pulse signal selected from among the preheating timer pulse signal and the 100% dimming timer pulse signal is selected and output as a timer pulse signal for each dimming ratio.
a selection circuit, a dimming input processing circuit that transmits the output signal of each waveform shaping circuit to each output terminal when the dimming ratio-specific timer pulse signal is at an inactive level, and a dimming input processing circuit that transmits the output signal of each of the waveform shaping circuits to each output terminal, and A light pulse signal, a pulse signal for each dimming ratio, the preheating timer pulse signal, a 100% dimming timer pulse signal, and each output pulse signal of the dimming input processing circuit are input in correspondence with each other, and these signals are Multiple AND circuits that perform logical product processing, and each of these AND circuits
An inverter fluorescent lamp comprising: an output circuit that amplifies the output signal of the D circuit; and a semiconductor switch element that turns on and off according to the output signal of the output circuit and drives a fluorescent lamp circuit including the fluorescent lamp. 2 Basic oscillation circuit, frequency divider circuit, timer circuit, 1st
The inverter fluorescent lamp according to claim 1, wherein the second selection circuit, the dimming input processing circuit, the plurality of AND circuits, and the output circuit are formed as one integrated circuit.