JPH0196737U - - Google Patents
Info
- Publication number
- JPH0196737U JPH0196737U JP19162587U JP19162587U JPH0196737U JP H0196737 U JPH0196737 U JP H0196737U JP 19162587 U JP19162587 U JP 19162587U JP 19162587 U JP19162587 U JP 19162587U JP H0196737 U JPH0196737 U JP H0196737U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- circuit
- protection circuit
- diagram showing
- 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
- 230000001747 exhibiting effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図は本考案の原理を示す回路図。第２図は
第１図の原理を示す回路図に使用される回路素子
５の特性を示す図。第３図は本考案の実施例の一
例を示す回路図。第４図は本考案の実施例の他の
一例を示す回路図。第５図は従来の発光ダイオー
ドの保護回路の一例を示す図。第６図は従来の発
光ダイオードの保護回路の他の一例を示す図。
第１図において、１は発光ダイオード、２はバ
ツフア抵抗、３は発光ダイオードのドライブ用ト
ランジスタ、４はエミツタ抵抗、５はサージの吸
収保護のために接続した回路素子、を示す。
FIG. 1 is a circuit diagram showing the principle of the present invention. FIG. 2 is a diagram showing the characteristics of the circuit element 5 used in the circuit diagram showing the principle of FIG. FIG. 3 is a circuit diagram showing an example of an embodiment of the present invention. FIG. 4 is a circuit diagram showing another example of the embodiment of the present invention. FIG. 5 is a diagram showing an example of a conventional protection circuit for a light emitting diode. FIG. 6 is a diagram showing another example of a conventional protection circuit for a light emitting diode. In FIG. 1, 1 is a light emitting diode, 2 is a buffer resistor, 3 is a transistor for driving the light emitting diode, 4 is an emitter resistor, and 5 is a circuit element connected for surge absorption protection.
Claims (1)
る電流を制限するバツフア抵抗２を直列に接続し
た回路の両端子に、 ツエナーダイオードの如き特性を示す回路素子
５を該発光ダイオード１に対して逆方向に並列に
接続したこと、 を特徴とする発光ダイオード保護回路。[Claims for Utility Model Registration] A circuit element 5 exhibiting Zener diode-like characteristics is connected to both terminals of a circuit in which a light emitting diode 1 and a buffer resistor 2 for limiting the current flowing through the light emitting diode 1 are connected in series. 1. A light emitting diode protection circuit characterized in that the light emitting diode protection circuit is connected in parallel in the opposite direction to 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19162587U JPH0196737U (en) | 1987-12-16 | 1987-12-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19162587U JPH0196737U (en) | 1987-12-16 | 1987-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0196737U true JPH0196737U (en) | 1989-06-27 |
Family
ID=31482528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19162587U Pending JPH0196737U (en) | 1987-12-16 | 1987-12-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0196737U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005020038A (en) * | 2004-10-18 | 2005-01-20 | Nichia Chem Ind Ltd | Light emitting diode |
| JP2007295758A (en) * | 2006-04-26 | 2007-11-08 | Denso Corp | Surge protector |
| JP2013225629A (en) * | 2012-04-23 | 2013-10-31 | Panasonic Corp | Lighting circuit and switch |
| JP2014192152A (en) * | 2013-03-28 | 2014-10-06 | Panasonic Corp | Switch with pilot lamp |
-
1987
- 1987-12-16 JP JP19162587U patent/JPH0196737U/ja active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005020038A (en) * | 2004-10-18 | 2005-01-20 | Nichia Chem Ind Ltd | Light emitting diode |
| JP2007295758A (en) * | 2006-04-26 | 2007-11-08 | Denso Corp | Surge protector |
| JP2013225629A (en) * | 2012-04-23 | 2013-10-31 | Panasonic Corp | Lighting circuit and switch |
| JP2014192152A (en) * | 2013-03-28 | 2014-10-06 | Panasonic Corp | Switch with pilot lamp |
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