JPS6021198U

JPS6021198U - discharge lamp lighting device

Info

Publication number: JPS6021198U
Application number: JP11388183U
Authority: JP
Inventors: 久保　和典; 石井　守一
Original assignee: 松下電工株式会社
Priority date: 1983-07-20
Filing date: 1983-07-20
Publication date: 1985-02-14

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図は従来例の電気回路図、第２図はこの考案の第１
の実施例に係るものでＡは口金ピン、ソケットの斜視図
、Ｂはその断面図、Ｃは主要部の電気回路図であり、第
３図は第２の実施例の主要部の電気回路図、第４図は第
３の実施例の１要部の電気回路図である。Ｔｒｓｑ　Ｔｒ２・・・トランジスタ、■・・・インバ
ータ、ＯＴ・・・発振トランス、Ｌｌ、Ｌ２．Ｌ３・・
・放電灯、Ｃ１，Ｃ２・・・シーケンスコンデンサ、Ｂ
Ｐｌ。ＢＦ２．ＢＦ２・・・バイパス回路、１・・・口金ピン
、２・・・ソケット口金、２ａ・・・第１０金部分、２
ｂ・・・第２０金部分、ｒｔ　　ｒ２９　　ｒ３・・・
リレー接点、ＩＳ・・・予熱電流検出回路、Ｒ・・・リ
レー駆動回路。Figure 1 is the electrical circuit diagram of the conventional example, and Figure 2 is the first diagram of this invention.
A is a perspective view of the base pin and socket, B is a sectional view thereof, C is an electric circuit diagram of the main part, and FIG. 3 is an electric circuit diagram of the main part of the second embodiment. , FIG. 4 is an electrical circuit diagram of one essential part of the third embodiment. Trsq Tr2...transistor, ■...inverter, OT...oscillation transformer, Ll, L2. L3...
・Discharge lamp, C1, C2...Sequence capacitor, B
Pl. BF2. BF2... Bypass circuit, 1... Base pin, 2... Socket base, 2a... 10th gold part, 2
b...20th gold part, rt r29 r3...
Relay contact, IS...preheating current detection circuit, R...relay drive circuit.

Claims

[Scope of utility model registration request]

(1) An inverter using transistors, a plurality of discharge lamps connected in series to the secondary side of the oscillation transformer of this inverter, and one of each of the plurality of discharge lamps except one.
a bypass circuit having a sequence capacitor connected in series to one discharge lamp and connected in parallel to the other discharge lamps;
A discharge lamp lighting device comprising means for cutting off the bypass circuit after one discharge lamp connected in series with the bypass circuit is lit.

(2) the cutoff means electrically insulates a socket cap for a cap pin of a discharge lamp connected in parallel to the bypass circuit into a portion connected to the sequence capacitor and a portion connected to an adjacent discharge lamp; The discharge lamp lighting device according to claim 1, which is a registered utility model, wherein the cap portion connected to the sequence capacitor is provided further back than the cap portion connected to the discharge lamp.

(3) The cutoff means includes a relay contact interposed in the bypass circuit, a detection circuit for preheating current of a filament of a discharge lamp connected in parallel with the bypass circuit, and a detection circuit for detecting a large current detected by the detection circuit. The discharge lamp lighting device according to claim 1, which is a registered utility model, and comprises a relay drive circuit that is closed when the circuit is closed and opened when the current is small.