JPH0235294U - - Google Patents
Info
- Publication number
- JPH0235294U JPH0235294U JP11469488U JP11469488U JPH0235294U JP H0235294 U JPH0235294 U JP H0235294U JP 11469488 U JP11469488 U JP 11469488U JP 11469488 U JP11469488 U JP 11469488U JP H0235294 U JPH0235294 U JP H0235294U
- Authority
- JP
- Japan
- Prior art keywords
- emitting element
- light emitting
- circuit
- oscillation
- series
- 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
- 230000010355 oscillation Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
Landscapes
- Burglar Alarm Systems (AREA)
Description
第１図は本考案の一実施例を示した回路ブロツ
ク図、第２図は第１図の特性図、第３図は本考案
の他の実施例を示した回路ブロツク図、第４図は
第３図の特性図、第５図は従来の回路ブロツク図
、第６図は従来の特性図である。
１……発振回路、２，５……トランジスタ、３
……ＬＥＤ（発光素子）、４……サーミスタ。
Fig. 1 is a circuit block diagram showing one embodiment of the present invention, Fig. 2 is a characteristic diagram of Fig. 1, Fig. 3 is a circuit block diagram showing another embodiment of the invention, and Fig. 4 is a circuit block diagram showing an embodiment of the present invention. FIG. 3 is a characteristic diagram, FIG. 5 is a conventional circuit block diagram, and FIG. 6 is a conventional characteristic diagram. 1...Oscillation circuit, 2, 5...Transistor, 3
...LED (light emitting element), 4...Thermistor.
Claims (1)
力を生ずる発振回路と、該発振回路の発振出力に
よりオン、オフ制御され直列接続した前記発光素
子を駆動するスイツチング回路と、前記発光素子
及びスイツチング回路に直列接続され雰囲気温度
の上昇に応じて前記発光素子の順電流を下げると
共に雰囲気温度の下降に応じて該順電流を増加さ
せる制御回路とを設けたことを特徴とする赤外線
遮断式検出器の発光駆動回路。 A light emitting element made of an LED, an oscillation circuit that generates an oscillation output of a predetermined frequency, a switching circuit that is controlled on and off by the oscillation output of the oscillation circuit and drives the light emitting element connected in series, and the light emitting element and the switching circuit. Light emission of an infrared cut-off type detector, characterized in that it is provided with a control circuit that is connected in series and reduces the forward current of the light emitting element in response to a rise in ambient temperature, and increases the forward current in response to a fall in ambient temperature. drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11469488U JPH0235294U (en) | 1988-08-31 | 1988-08-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11469488U JPH0235294U (en) | 1988-08-31 | 1988-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0235294U true JPH0235294U (en) | 1990-03-07 |
Family
ID=31355677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11469488U Pending JPH0235294U (en) | 1988-08-31 | 1988-08-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0235294U (en) |
-
1988
- 1988-08-31 JP JP11469488U patent/JPH0235294U/ja active Pending