JPS58193276U - Light emitting diode test circuit - Google Patents
Light emitting diode test circuitInfo
- Publication number
- JPS58193276U JPS58193276U JP1982091983U JP9198382U JPS58193276U JP S58193276 U JPS58193276 U JP S58193276U JP 1982091983 U JP1982091983 U JP 1982091983U JP 9198382 U JP9198382 U JP 9198382U JP S58193276 U JPS58193276 U JP S58193276U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- switching transistor
- circuit
- constant voltage
- 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図は従来の発光ダイオードの試験回路を示す回路図
、第２図は発光ダイオード及びスイッチングトランジス
タの内部状態を示す図、第３図は本考案発光ダイオード
の試験回路を示す回路図である。
１・・・発光ダイオード、２・・・スイッチングトラン
ジスタ、４・・・安定化抵抗。FIG. 1 is a circuit diagram showing a conventional test circuit for a light emitting diode, FIG. 2 is a diagram showing the internal state of a light emitting diode and a switching transistor, and FIG. 3 is a circuit diagram showing a test circuit for a light emitting diode of the present invention. 1... Light emitting diode, 2... Switching transistor, 4... Stabilizing resistor.
Claims (1)
ジスタに複数個直列に繋がれた被試験発光ダイオードと
、これらの発光ダイオード及びスイッチングトランジス
タよりなる直列回路に順方向に定電圧を加える定電圧回
路と、前記スイッチングトランジスタのベースにパルス
’Ｉ圧を加えてこのトランジスタをＯＮ・ＯＦＦ駆動し
て前記発光ダイオードを点滅せしめるパルス発生回路と
から成り、前記発光ダイオードを点滅せしめることによ
って、発光ダイオードの耐久試験を行う発光ダイオード
の試験回路において、前記複数の被試験発光ダイオード
に並列に抵抗を接続してスイッチングトランジスタＯＦ
Ｆ時に、トランジスタに前記定電圧回路の定電圧を印加
することによりこのスイッチングトランジスタのスイッ
チング動作を安定化させることを特徴とした発光ダイオ
ードの試験回路。A switching transistor, a plurality of light emitting diodes to be tested connected in series to the switching transistor, a constant voltage circuit that applies a constant voltage in a forward direction to a series circuit composed of these light emitting diodes and the switching transistor, and a base of the switching transistor. and a pulse generating circuit that turns on and off the transistor by applying a pulse 'I pressure to the light emitting diode, thereby making the light emitting diode flicker. In the circuit, a resistor is connected in parallel to the plurality of light emitting diodes to be tested, and a switching transistor OF
A test circuit for a light emitting diode, characterized in that the switching operation of the switching transistor is stabilized by applying a constant voltage of the constant voltage circuit to the transistor at F time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982091983U JPS58193276U (en) | 1982-06-18 | 1982-06-18 | Light emitting diode test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982091983U JPS58193276U (en) | 1982-06-18 | 1982-06-18 | Light emitting diode test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58193276U true JPS58193276U (en) | 1983-12-22 |
Family
ID=30100201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982091983U Pending JPS58193276U (en) | 1982-06-18 | 1982-06-18 | Light emitting diode test circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58193276U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6973911B2 (en) | 2002-04-12 | 2005-12-13 | Iida Denki Kogyo Co., Ltd. | Method and device for controlling ignition timing of ignition device for internal combustion engine |
-
1982
- 1982-06-18 JP JP1982091983U patent/JPS58193276U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6973911B2 (en) | 2002-04-12 | 2005-12-13 | Iida Denki Kogyo Co., Ltd. | Method and device for controlling ignition timing of ignition device for internal combustion engine |
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