JPS6286699U - - Google Patents
Info
- Publication number
- JPS6286699U JPS6286699U JP17867385U JP17867385U JPS6286699U JP S6286699 U JPS6286699 U JP S6286699U JP 17867385 U JP17867385 U JP 17867385U JP 17867385 U JP17867385 U JP 17867385U JP S6286699 U JPS6286699 U JP S6286699U
- Authority
- JP
- Japan
- Prior art keywords
- power source
- driving transistor
- light emitting
- resistor
- 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
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Audible And Visible Signals (AREA)
Description
図面は本考案の一実施例を示した電気回路図で
ある。
Ａ……コンデンサ形電源、Ｌ……発光ダイオー
ド、Ｔｒ１……駆動トランジスタ、Ｔｒ２……制
御トランジスタ、ｂ……Ｃｄｓ、ｒ５……抵抗。
The drawing is an electrical circuit diagram showing an embodiment of the present invention. A...Capacitor type power supply, L...Light emitting diode, Tr1 ...Drive transistor, Tr2 ...Control transistor, b... Cds , r5 ...Resistance.
Claims (1)
発光素子および駆動トランジスタを直列に接続し
てあり、上記電源には光感応素子および抵抗を直
列に接続してあり、さらに上記電源に上記駆動ト
ランジスタとは極性が逆の制御トランジスタを接
続してあり、上記駆動トランジスタおよび上記制
御トランジスタのベースはともに上記光感応素子
および上記抵抗の間に接続したことを特徴とする
発光素子の自動調光装置。 A capacitor-type step-down circuit is used as a power source, a light emitting element and a driving transistor are connected in series to this power source, a photosensitive element and a resistor are connected in series to the power source, and the driving transistor is connected to the power source. 1. An automatic dimming device for a light emitting device, characterized in that control transistors having opposite polarities are connected, and bases of the driving transistor and the control transistor are both connected between the photosensitive element and the resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17867385U JPS6286699U (en) | 1985-11-20 | 1985-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17867385U JPS6286699U (en) | 1985-11-20 | 1985-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6286699U true JPS6286699U (en) | 1987-06-02 |
Family
ID=31121026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17867385U Pending JPS6286699U (en) | 1985-11-20 | 1985-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6286699U (en) |
-
1985
- 1985-11-20 JP JP17867385U patent/JPS6286699U/ja active Pending
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