JPS6133458U - Light emitting diode drive circuit - Google Patents

Light emitting diode drive circuit

Info

Publication number
JPS6133458U
JPS6133458U JP1984116995U JP11699584U JPS6133458U JP S6133458 U JPS6133458 U JP S6133458U JP 1984116995 U JP1984116995 U JP 1984116995U JP 11699584 U JP11699584 U JP 11699584U JP S6133458 U JPS6133458 U JP S6133458U
Authority
JP
Japan
Prior art keywords
light emitting
emitting diode
drive circuit
transistor
diode drive
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
JP1984116995U
Other languages
Japanese (ja)
Inventor
康 高橋
Original Assignee
日立電線株式会社
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 日立電線株式会社 filed Critical 日立電線株式会社
Priority to JP1984116995U priority Critical patent/JPS6133458U/en
Publication of JPS6133458U publication Critical patent/JPS6133458U/en
Pending legal-status Critical Current

Links

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

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の発光ダイオード駆動回路の一実施例を
示す回路図、第２図は従来の発光ダイオード駆動回路の
回路図である。 １・・・発光ダイオード、２・・・トランジスタ、４・
・・可変電圧源、５・・・リレー接点、６，７・・・エ
ミッタ接地抵抗。FIG. 1 is a circuit diagram showing an embodiment of the light emitting diode drive circuit of the present invention, and FIG. 2 is a circuit diagram of a conventional light emitting diode drive circuit. 1... Light emitting diode, 2... Transistor, 4...
...Variable voltage source, 5...Relay contact, 6,7...Emitter grounding resistance.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 発光ダイオードに流す電流を制御するトランジスタと、
該トランジスタのベースに接続された可変電圧源と、前
記トランジスタのエミツタ接地抵抗とからなる発光ダイ
ード駆動回路において、前記エミツタ接地抵抗が抵抗値
が異なる複数個の抵抗からなり、前記トランジスタのエ
ミツタと前記各エミツタ接地抵抗との間に前記各エミツ
タ接地抵抗を切り換えるためのリレー接点を設けた構成
としてあることを特徴とする発光ダイオード駆動回路。A transistor that controls the current flowing through the light emitting diode,
In a light emitting diode drive circuit comprising a variable voltage source connected to the base of the transistor and a grounded emitter resistor of the transistor, the grounded emitter resistor is composed of a plurality of resistors having different resistance values, and the emitter of the transistor and the grounded emitter of the transistor are connected to each other. 1. A light emitting diode drive circuit characterized in that a relay contact for switching each emitter grounding resistor is provided between each emitter grounding resistor.
JP1984116995U 1984-07-30 1984-07-30 Light emitting diode drive circuit Pending JPS6133458U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1984116995U JPS6133458U (en) 1984-07-30 1984-07-30 Light emitting diode drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984116995U JPS6133458U (en) 1984-07-30 1984-07-30 Light emitting diode drive circuit

Publications (1)

Publication Number Publication Date
JPS6133458U true JPS6133458U (en) 1986-02-28

Family

ID=30675908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1984116995U Pending JPS6133458U (en) 1984-07-30 1984-07-30 Light emitting diode drive circuit

Country Status (1)

Country Link
JP (1) JPS6133458U (en)

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