JPS58182448U - Light emitting element drive circuit - Google Patents
Light emitting element drive circuitInfo
- Publication number
- JPS58182448U JPS58182448U JP1982080820U JP8082082U JPS58182448U JP S58182448 U JPS58182448 U JP S58182448U JP 1982080820 U JP1982080820 U JP 1982080820U JP 8082082 U JP8082082 U JP 8082082U JP S58182448 U JPS58182448 U JP S58182448U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting element
- power supply
- supply voltage
- drive circuit
- 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
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
第１図及び第２図は従来例を示すＬＥＤの駆動回路図、
第３図イ９口は本考案の実施例を示す概略図、第４図は
本考案の実施例を示す具体回路図、第５図は電源電圧の
高低を検出する検出回路を示す具体回路図、第６図イ１
口は第５図の各部の波形を示す波形図である。
主な図番の説明、１．５．９． １３． １４゜１５．
１６・・・・・・ＬＥＤ、 ２．４．７．８． １１゜
１２・・・・・・スイッチ、３． ６． １０． １８
． １９・・・・・・定電流回路、１７．２０・・・・
・・スイッチングトランジスタ、２１・・・・・・ダイ
オード、２２・・・・・・ツェナーダイオード、２３．
２４． ２５・・・・・・抵抗、２６・・・・・・コ
ンパレータ、２７・・・・・・スイッチングトランジス
タ。
第５１に−
第６図Figures 1 and 2 are LED drive circuit diagrams showing conventional examples;
Fig. 3 A9 is a schematic diagram showing an embodiment of the present invention, Fig. 4 is a specific circuit diagram showing an embodiment of the present invention, and Fig. 5 is a specific circuit diagram showing a detection circuit for detecting the level of the power supply voltage. , Figure 6 I1
The mouth is a waveform diagram showing the waveforms of each part in FIG. 5. Explanation of main figure numbers, 1.5.9. 13. 14°15.
16...LED, 2.4.7.8. 11゜12...Switch, 3. 6. 10. 18
．． 19... Constant current circuit, 17.20...
... Switching transistor, 21 ... Diode, 22 ... Zener diode, 23.
24. 25...Resistor, 26...Comparator, 27...Switching transistor. 51st - Figure 6
Claims (1)
子及び第１のスイッチング素子と、前記電源電圧端子間
に直列に接続された第２のスイッチング素子及び第２の
発光素子と、前記第１及ｉ第２の発光素子の一端に接続
され第１及び第２のスイッチング素子と逆動作する第３
のスイッチング素子とを有し、前記第１及び第２のスイ
ッチング素子を前記電源電圧の高低に応じて制御するこ
とにより、前記第１及び第２の発光素子を、前記電源電
圧が高いときは直列接続して駆動し、前記電源電圧が低
いときは並列接続して駆動するようにしたことを特徴と
する発光素子の駆動回路。a first light emitting element and a first switching element connected in series between a pair of power supply voltage terminals; a second switching element and a second light emitting element connected in series between the power supply voltage terminals; A third switching element connected to one end of the first and i-second light emitting elements and operating inversely to the first and second switching elements.
By controlling the first and second switching elements according to the level of the power supply voltage, the first and second light emitting elements are connected in series when the power supply voltage is high. 1. A drive circuit for a light emitting element, characterized in that the light emitting element is connected and driven, and when the power supply voltage is low, the light emitting element is connected and driven in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982080820U JPS58182448U (en) | 1982-05-31 | 1982-05-31 | Light emitting element drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982080820U JPS58182448U (en) | 1982-05-31 | 1982-05-31 | Light emitting element drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58182448U true JPS58182448U (en) | 1983-12-05 |
Family
ID=30089954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982080820U Pending JPS58182448U (en) | 1982-05-31 | 1982-05-31 | Light emitting element drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58182448U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011091393A (en) * | 2009-10-02 | 2011-05-06 | Optromax Electronics Co Ltd | Electronic device |
| JP2012533883A (en) * | 2009-07-17 | 2012-12-27 | ブリッジラックス インコーポレイテッド | Reconfigurable LED array and use in lighting system |
| JP2014116354A (en) * | 2012-12-06 | 2014-06-26 | Stanley Electric Co Ltd | Light-emitting element drive unit, luminaire |
| JP2017017127A (en) * | 2015-06-30 | 2017-01-19 | 新日本無線株式会社 | Led driving circuit |
-
1982
- 1982-05-31 JP JP1982080820U patent/JPS58182448U/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012533883A (en) * | 2009-07-17 | 2012-12-27 | ブリッジラックス インコーポレイテッド | Reconfigurable LED array and use in lighting system |
| JP2011091393A (en) * | 2009-10-02 | 2011-05-06 | Optromax Electronics Co Ltd | Electronic device |
| JP2014116354A (en) * | 2012-12-06 | 2014-06-26 | Stanley Electric Co Ltd | Light-emitting element drive unit, luminaire |
| JP2017017127A (en) * | 2015-06-30 | 2017-01-19 | 新日本無線株式会社 | Led driving circuit |
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