JPH048299U

JPH048299U -

Info

Publication number: JPH048299U
Application number: JP4715290U
Authority: JP
Priority date: 1990-05-02
Filing date: 1990-05-02
Publication date: 1992-01-24

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示す回路図、第２
図は第１図の回路の各部の電位の経時変化を示す
タイムチヤート、第３図は他の実施例を示す回路
図である。第４図および第５図は従来の２例を示
す回路図である。１……電源スイツチ、２……電源、３……昇圧
回路、４……メインコンデンサ、５……インダク
タ、６，１５，２１……ダイオード、８……トリ
ガコンデンサ、９……トリガトランス、１０……
サイリスタ、１４……調光制御回路、１６，５１
……トランジスタ、１９……ゲートコンデンサ、
２２……ツエナーダイオード、２４……絶縁ゲー
ト型バイポーラトランジスタ（ＩＧＢＴ）、２５
……発光管、７〜１３……トリガ回路ＴＧＣ、１
５，１９，２０，２２，２３……オン回路ＯＮＣ
、１６，１７，１８，２１……オフ回路ＯＦＣ。 Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a time chart showing changes over time in the potential of each part of the circuit of FIG. 1, and FIG. 3 is a circuit diagram showing another embodiment. FIGS. 4 and 5 are circuit diagrams showing two conventional examples. 1... Power switch, 2... Power supply, 3... Boost circuit, 4... Main capacitor, 5... Inductor, 6, 15, 21... Diode, 8... Trigger capacitor, 9... Trigger transformer, 10 ……
Thyristor, 14...Dimmer control circuit, 16, 51
...Transistor, 19...Gate capacitor,
22... Zener diode, 24... Insulated gate bipolar transistor (IGBT), 25
... Arc tube, 7-13 ... Trigger circuit TGC, 1
5, 19, 20, 22, 23...On circuit ONC
, 16, 17, 18, 21...off circuit OFC.

Claims

[Claims for Utility Model Registration] A main power source, a capacitor that stores the energy of the emitted light, an arc tube connected in parallel to the capacitor, an insulated gate bipolar transistor that turns on and off the arc tube, and the light emitting device. a trigger circuit that applies a high voltage to a trigger electrode of the tube; and a gate voltage is applied to the gate from the power source for the insulated gate bipolar transistor through a resistor to turn on the insulated gate bipolar transistor; A light emission control circuit for an electronic flash device, comprising: a control circuit that turns off the insulated gate bipolar transistor by short-circuiting a connection line between a power source for the bipolar transistor and the gate to a reference potential line; A unidirectional element that only allows current from the insulated gate bipolar transistor is provided between the reference potential line and the connection point of the unidirectional element, the resistor, and the power source for the insulated gate bipolar transistor. 1. A light emission control circuit for an electronic flash device, comprising a switching element that turns off a gate type bipolar transistor and turns on the insulated gate type bipolar transistor when opened.