JPS63174470U - - Google Patents
Info
- Publication number
- JPS63174470U JPS63174470U JP1987043443U JP4344387U JPS63174470U JP S63174470 U JPS63174470 U JP S63174470U JP 1987043443 U JP1987043443 U JP 1987043443U JP 4344387 U JP4344387 U JP 4344387U JP S63174470 U JPS63174470 U JP S63174470U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diodes
- power supply
- constant current
- emitting diode
- 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 3
Description
第１図は本考案発光ダイオード駆動回路の一実
施例に係る交流出力回路の一構成例を示す回路図
、第２図は第１図における定電流電源回路の一構
成例を示す回路図、第３図は従来の発光ダイオー
ド駆動回路の回路図である。
１……発光ダイオード駆動用電源、２……ホト
トライアツクカプラ、２ａ……発光ダイオード、
４ａ……トランジスタ、６……定電流電源回路。
1 is a circuit diagram showing an example of the configuration of an AC output circuit according to an embodiment of the light emitting diode drive circuit of the present invention; FIG. 2 is a circuit diagram showing an example of the configuration of the constant current power supply circuit in FIG. 1; FIG. 3 is a circuit diagram of a conventional light emitting diode drive circuit. 1...Power supply for driving light emitting diode, 2...Phototriax coupler, 2a...Light emitting diode,
4a...transistor, 6...constant current power supply circuit.
Claims (1)
電源回路と複数個の発光ダイオードとを直列に接
続し、前記発光ダイオードを個々に短絡できるよ
う前記発光ダイオードと並列に開閉素子を接続し
たことを特徴とする発光ダイオード駆動回路。 A constant current power supply circuit and a plurality of light emitting diodes are connected in series between lines of a power source for driving the light emitting diodes, and a switching element is connected in parallel with the light emitting diodes so that the light emitting diodes can be short-circuited individually. Light emitting diode drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987043443U JPS63174470U (en) | 1987-03-26 | 1987-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987043443U JPS63174470U (en) | 1987-03-26 | 1987-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63174470U true JPS63174470U (en) | 1988-11-11 |
Family
ID=30860305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987043443U Pending JPS63174470U (en) | 1987-03-26 | 1987-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63174470U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330884A (en) * | 1976-08-11 | 1978-03-23 | Fujitsu Ltd | Light emitting diode driving circuit |
-
1987
- 1987-03-26 JP JP1987043443U patent/JPS63174470U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330884A (en) * | 1976-08-11 | 1978-03-23 | Fujitsu Ltd | Light emitting diode driving circuit |