JPS5991762U - Constant current drive IC for light emitting diode - Google Patents

Constant current drive IC for light emitting diode

Info

Publication number
JPS5991762U
JPS5991762U JP1982186777U JP18677782U JPS5991762U JP S5991762 U JPS5991762 U JP S5991762U JP 1982186777 U JP1982186777 U JP 1982186777U JP 18677782 U JP18677782 U JP 18677782U JP S5991762 U JPS5991762 U JP S5991762U
Authority
JP
Japan
Prior art keywords
light emitting
emitting diode
constant current
current drive
current driving
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
JP1982186777U
Other languages
Japanese (ja)
Inventor
米沢　善昭
Original Assignee
三洋電機株式会社
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 三洋電機株式会社 filed Critical 三洋電機株式会社
Priority to JP1982186777U priority Critical patent/JPS5991762U/en
Publication of JPS5991762U publication Critical patent/JPS5991762U/en
Pending legal-status Critical Current

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  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Audible And Visible Signals (AREA)

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 the drawing]

第１図は従来の発光ダイオードの定電流駆動用ＩＣを示
す回路図、第２図は本考案の原理を説明するための回路
図、第３図及び第４図は本考案による発光ダイオードの
定電流駆動用ＩＣの実施例を示す回路図である。 主な図番の説明、１．２・・・・・・ＬＥＤ、３，４゜
１４．１５・・・・・・駆動トランジスタ、５．　６．
　１３・・・・・・トランジスタ、８．９・・・・・・
外付抵抗、１６゜１７．１８，１９，２３．２４．２５
．２６・・・・・・抵抗、２０．２１・・・・・・外部
端子。Fig. 1 is a circuit diagram showing a conventional constant current driving IC for a light emitting diode, Fig. 2 is a circuit diagram for explaining the principle of the present invention, and Figs. FIG. 2 is a circuit diagram showing an example of a current driving IC. Explanation of main figure numbers, 1.2...LED, 3,4゜14.15...drive transistor, 5. 6.
13...Transistor, 8.9...
External resistor, 16°17.18, 19, 23.24.25
．． 26...Resistance, 20.21...External terminal.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 発光ダイオードを駆動トランジスタにより定電流駆動す
る定電流駆動用ｉｃにおいて、前記駆動トランジスタの
エミッタ抵抗値を切換えるための外部端子を設けたこと
を特徴とする発光ダイオードの定電流駆動用ＩＣ０An IC for constant current driving of a light emitting diode, characterized in that an IC for constant current driving of a light emitting diode is provided with an external terminal for switching the emitter resistance value of the driving transistor.
JP1982186777U 1982-12-09 1982-12-09 Constant current drive IC for light emitting diode Pending JPS5991762U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1982186777U JPS5991762U (en) 1982-12-09 1982-12-09 Constant current drive IC for light emitting diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1982186777U JPS5991762U (en) 1982-12-09 1982-12-09 Constant current drive IC for light emitting diode

Publications (1)

Publication Number Publication Date
JPS5991762U true JPS5991762U (en) 1984-06-21

Family

ID=30403352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1982186777U Pending JPS5991762U (en) 1982-12-09 1982-12-09 Constant current drive IC for light emitting diode

Country Status (1)

Country Link
JP (1) JPS5991762U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0217859U (en) * 1988-07-21 1990-02-06
JP2014153780A (en) * 2013-02-05 2014-08-25 Ricoh Co Ltd Constant current circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624164B2 (en) * 1973-04-25 1981-06-04

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624164B2 (en) * 1973-04-25 1981-06-04

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0217859U (en) * 1988-07-21 1990-02-06
JP2014153780A (en) * 2013-02-05 2014-08-25 Ricoh Co Ltd Constant current circuit

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