JPS593561U - Light emitting diode drive circuit - Google Patents

Light emitting diode drive circuit

Info

Publication number
JPS593561U
JPS593561U JP1982098505U JP9850582U JPS593561U JP S593561 U JPS593561 U JP S593561U JP 1982098505 U JP1982098505 U JP 1982098505U JP 9850582 U JP9850582 U JP 9850582U JP S593561 U JPS593561 U JP S593561U
Authority
JP
Japan
Prior art keywords
light emitting
emitting diode
transistor
drive circuit
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
JP1982098505U
Other languages
Japanese (ja)
Inventor
宮下　均
岡本　晋典
耕司 山下
博夫 井上
祥明 神戸
Original Assignee
松下電工株式会社
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 松下電工株式会社 filed Critical 松下電工株式会社
Priority to JP1982098505U priority Critical patent/JPS593561U/en
Publication of JPS593561U publication Critical patent/JPS593561U/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図は従来例の具体回路図、第２図は本考案の一実施
例の具体回路図、第３図は同上の他の実施例の具体回路
図である。 Ｒは抵抗、ＬＥＤは発光ダイオード、Ｔｒはトランジス
タを示す。FIG. 1 is a specific circuit diagram of a conventional example, FIG. 2 is a specific circuit diagram of one embodiment of the present invention, and FIG. 3 is a specific circuit diagram of another embodiment of the same. R represents a resistor, LED represents a light emitting diode, and Tr represents a transistor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 電流制限用抵抗と発光ダイオードとの直列回路を電源に
接続し、発光ダイオードと並列にトラン、　ジスタを接
続し１、前記抵抗および発光ダイオードの接続点とトラ
ンジスタとの間に、発光ダ゛イオードの順方向降下電圧
から前記トランジスタのコレクタ・エミッタ間飽和電圧
を引いた電圧に略等しくなる電圧降下要素を挿入接続し
て成る発光ダイオードの駆動回路。A series circuit of a current limiting resistor and a light emitting diode is connected to a power supply, a transistor and a transistor are connected in parallel with the light emitting diode, and the light emitting diode is connected between the connection point of the resistor and the light emitting diode and the transistor. A light emitting diode drive circuit comprising a voltage drop element which is inserted and connected to be approximately equal to the voltage obtained by subtracting the collector-emitter saturation voltage of the transistor from the forward drop voltage.
JP1982098505U 1982-06-30 1982-06-30 Light emitting diode drive circuit Pending JPS593561U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1982098505U JPS593561U (en) 1982-06-30 1982-06-30 Light emitting diode drive circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1982098505U JPS593561U (en) 1982-06-30 1982-06-30 Light emitting diode drive circuit

Publications (1)

Publication Number Publication Date
JPS593561U true JPS593561U (en) 1984-01-11

Family

ID=30233837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1982098505U Pending JPS593561U (en) 1982-06-30 1982-06-30 Light emitting diode drive circuit

Country Status (1)

Country Link
JP (1) JPS593561U (en)

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