JPS58191660U - Light emitting diode drive circuit - Google Patents
Light emitting diode drive circuitInfo
- Publication number
- JPS58191660U JPS58191660U JP1982091013U JP9101382U JPS58191660U JP S58191660 U JPS58191660 U JP S58191660U JP 1982091013 U JP1982091013 U JP 1982091013U JP 9101382 U JP9101382 U JP 9101382U JP S58191660 U JPS58191660 U JP S58191660U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- drive circuit
- current
- switch means
- 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
- 238000012360 testing method Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Switch Cases, Indication, And Locking (AREA)
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駆動回路を示す回路図、
第１ａ図は第１図の回路で使用される電流の波形図、第
２図はこの考案の一実施例を示す回路図、第２ａ図は第
２図および第３図の回路で使用される電流の波形図、第
３図は他の実施例を示す回路図である。
１ａと１ｂ・・・・・・発光ダイオード駆動回路、２・
・・・・・電源、３と６と８・・・・・・抵抗、４・・
・・・・発光ダイオード、５・・・・・・トランジスタ
、７ａと７ｂと７０・・・・・・テスト端子、２０ａ・
・・・・・測定回路である。なお、図中同一符号は同一
、又は相当部分を示す。
補正 昭５７．１１． ６
実用新案登録請求の範囲を次のように補正する。
Ｏ実用新案登録請求の範囲
（１）電源の両端間に抵抗、発光ダイオードおよびスイ
ッチ手疫を直列に接続し、上記スイッチ手段４閉じた時
に上記全米ダざオードを駆動する発光ダイオード駆動回
路において、上記発光ダイオードのテスト時に、通常の
駆動電流より小さいがパルス幅の長い電流を流すことを
特徴とする発光ダイオード駆動回路。
（２） 通常の駆動電流より小さいがパルス幅の長い
電流を流すために、発光ダイオードの一端とスイッチ手
段の一方の出力端子との接続点が別な抵抗を介して一方
のテスト端子へ接続されると共に上記スイッチ手段の他
方の出力端子が他方のテスト端子き直接接続・されたこ
とを特徴とする実用新案登録請求の範囲第１項記載の発
光ダイオード駆動回路。゛
（３）通常の駆動電流より小さいがパルス幅の長い電流
を流すためにスイッチ手段の制御端子が別個抵抗を介し
てテスト端子へ接続されたことを特徴とする実用新案登
録請求の範囲第１項記載の発光ダイオード駆動回路。Figure 1 is a circuit diagram showing a conventional light emitting diode drive circuit.
Figure 1a is a waveform diagram of the current used in the circuit of Figure 1, Figure 2 is a circuit diagram showing an embodiment of this invention, Figure 2a is used in the circuits of Figures 2 and 3. The current waveform diagram and FIG. 3 are circuit diagrams showing another embodiment. 1a and 1b... Light emitting diode drive circuit, 2.
...Power supply, 3, 6 and 8...Resistance, 4...
...Light emitting diode, 5...Transistor, 7a and 7b and 70...Test terminal, 20a.
...This is a measurement circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts. Correction 1982.11. 6. The scope of claims for utility model registration shall be amended as follows. O Utility Model Registration Claims (1) A light emitting diode drive circuit which connects a resistor, a light emitting diode, and a switch in series between both ends of a power source, and drives the light emitting diode when the switch means 4 is closed, A light emitting diode drive circuit characterized in that when testing the light emitting diode, a current smaller than a normal drive current but having a longer pulse width is passed. (2) In order to flow a current that is smaller than the normal drive current but has a longer pulse width, the connection point between one end of the light emitting diode and one output terminal of the switch means is connected to one test terminal via another resistor. 2. The light emitting diode drive circuit according to claim 1, wherein the other output terminal of the switch means is directly connected to the other test terminal. (3) Utility model registration claim 1, characterized in that the control terminal of the switch means is connected to the test terminal via a separate resistor in order to flow a current that is smaller than the normal drive current but has a longer pulse width. The light emitting diode drive circuit described in Section 1.
Claims (3)
スイッチ手段を直列に接続し、上記スイッチ手段を閉じ
た時に上記発光ダイオードを駆動する発光ダイオード駆
動回路において、上記発光ダイオードのテスト時に、通
常の駆動電流より小さいがパルス幅の長い電流を流すこ
とを特徴とする発光ダイオード駆動回路。(1) In a light emitting diode drive circuit that connects a resistor, a light emitting diode, and a switch means in series across a power supply and drives the light emitting diode when the switch means is closed, when testing the light emitting diode, the light emitting diode is normally driven. A light emitting diode drive circuit that is characterized by passing a current that is smaller than the current but has a longer pulse width.
を流すために、発光グイオートのカソードとスイッチ手
段の一方の出力端子との接続点が別な抵抗を介して一方
のテスト端子へ接続されると共に上記スイッチ手段の他
方の出力端子が他方のテスト端子−８直接接続されたこ
とを特徴とする実用新案登録請求の範囲第１項記載の発
光ダイオード駆動回路。(2) In order to flow a current that is smaller than the normal drive current but has a longer pulse width, the connection point between the cathode of the light-emitting guide and one output terminal of the switch means is connected to one test terminal via another resistor. 2. The light emitting diode drive circuit according to claim 1, wherein the other output terminal of the switch means is directly connected to the other test terminal -8.
を流すためにスイッチ手段の制御端子が別な抵抗を介し
てテスト端子へ接続されたことを特徴とする実用新案登
録請求の範囲第１項記載の発光ダイオード駆動回路。(3) Utility model registration claim 1, characterized in that the control terminal of the switch means is connected to the test terminal via another resistor in order to flow a current smaller than the normal drive current but with a longer pulse width. The light emitting diode drive circuit described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982091013U JPS58191660U (en) | 1982-06-16 | 1982-06-16 | Light emitting diode drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982091013U JPS58191660U (en) | 1982-06-16 | 1982-06-16 | Light emitting diode drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58191660U true JPS58191660U (en) | 1983-12-20 |
Family
ID=30099441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982091013U Pending JPS58191660U (en) | 1982-06-16 | 1982-06-16 | Light emitting diode drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58191660U (en) |
-
1982
- 1982-06-16 JP JP1982091013U patent/JPS58191660U/en active Pending
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