JPH02101558U - - Google Patents
Info
- Publication number
- JPH02101558U JPH02101558U JP874889U JP874889U JPH02101558U JP H02101558 U JPH02101558 U JP H02101558U JP 874889 U JP874889 U JP 874889U JP 874889 U JP874889 U JP 874889U JP H02101558 U JPH02101558 U JP H02101558U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- switch
- drive circuit
- emitting diode
- 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
Links
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Audible And Visible Signals (AREA)
Description
第１図は本考案の原理構成を示す図、第２図は
本考案の一実施例を示す図、第３図は消費電力を
説明するための図、第４図は本考案の別の実施例
を示す図、第５図は従来のＬＥＤ駆動回路図、第
６図は自動車電話用ハンドセツトの一例を示す正
面図である。
図において、２１……電源回路、３１……定電
圧回路、４１……定電流回路、２２，３２−１，
３２−２，３２−３……ＬＥＤ、２３……スイツ
チ、３３−２，３３−３……トランジスタ、２４
……スイツチオン・オフ制御部、３４……トラン
ジスタオン・オフ制御部、３５……第１の抵抗、
３６−２，３６−３……第２の抵抗である。
Figure 1 is a diagram showing the principle configuration of the present invention, Figure 2 is a diagram showing an embodiment of the invention, Figure 3 is a diagram for explaining power consumption, and Figure 4 is another implementation of the invention. FIG. 5 is a conventional LED drive circuit diagram, and FIG. 6 is a front view showing an example of a car phone handset. In the figure, 21...power supply circuit, 31...constant voltage circuit, 41...constant current circuit, 22, 32-1,
32-2, 32-3...LED, 23...Switch, 33-2, 33-3...Transistor, 24
...Switch on/off control section, 34...Transistor on/off control section, 35...First resistor,
36-2, 36-3... second resistors.
Claims (1)
イオード駆動回路において、 前記複数の発光ダイオード２２を直列接続して
これらに電源供給する電源回路２１と、 各該発光ダイオード２２に並列接続される複数
のスイツチ２３と、 各該スイツチ２３のオンまたはオフを個別に制
御するスイツチオン・オフ制御部２４とからなる
ことを特徴とする発光ダイオード駆動回路。[Claims for Utility Model Registration] A light emitting diode drive circuit for driving a plurality of light emitting diodes, comprising: a power supply circuit 21 connecting the plurality of light emitting diodes 22 in series and supplying power to them; A light emitting diode drive circuit comprising: a plurality of switches 23 connected in parallel; and a switch on/off control section 24 that individually controls on or off of each switch 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP874889U JPH02101558U (en) | 1989-01-28 | 1989-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP874889U JPH02101558U (en) | 1989-01-28 | 1989-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02101558U true JPH02101558U (en) | 1990-08-13 |
Family
ID=31214899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP874889U Pending JPH02101558U (en) | 1989-01-28 | 1989-01-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02101558U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002343587A (en) * | 2001-05-18 | 2002-11-29 | Toa Corp | Lighting circuit for light-emitting diode and lighting method of light-emitting diode |
| JP2012039158A (en) * | 2011-11-21 | 2012-02-23 | Terada Electric Works Co Ltd | Led driver circuit and led drive method |
| JP2018508102A (en) * | 2015-03-09 | 2018-03-22 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | LED lighting circuit using controllable lighting device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5324293A (en) * | 1976-08-19 | 1978-03-06 | Fujitsu Ltd | Dri ving circuit for light emitting diode |
| JPS569765B2 (en) * | 1976-02-21 | 1981-03-04 |
-
1989
- 1989-01-28 JP JP874889U patent/JPH02101558U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS569765B2 (en) * | 1976-02-21 | 1981-03-04 | ||
| JPS5324293A (en) * | 1976-08-19 | 1978-03-06 | Fujitsu Ltd | Dri ving circuit for light emitting diode |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002343587A (en) * | 2001-05-18 | 2002-11-29 | Toa Corp | Lighting circuit for light-emitting diode and lighting method of light-emitting diode |
| JP4527316B2 (en) * | 2001-05-18 | 2010-08-18 | ティーオーエー株式会社 | Light emitting diode lighting circuit and light emitting diode lighting method |
| JP2012039158A (en) * | 2011-11-21 | 2012-02-23 | Terada Electric Works Co Ltd | Led driver circuit and led drive method |
| JP2018508102A (en) * | 2015-03-09 | 2018-03-22 | コーニンクレッカ フィリップス エヌ ヴェＫｏｎｉｎｋｌｉｊｋｅ Ｐｈｉｌｉｐｓ Ｎ．Ｖ． | LED lighting circuit using controllable lighting device |