JPH0233465U - - Google Patents
Info
- Publication number
- JPH0233465U JPH0233465U JP1988112138U JP11213888U JPH0233465U JP H0233465 U JPH0233465 U JP H0233465U JP 1988112138 U JP1988112138 U JP 1988112138U JP 11213888 U JP11213888 U JP 11213888U JP H0233465 U JPH0233465 U JP H0233465U
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- emitting diode
- duty cycle
- drive signal
- power supply
- 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
- 238000010586 diagram Methods 0.000 description 6
Landscapes
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Description
第１図は本考案による発光ダイオードの調光回
路の一実施例を示す回路構成図、第２図は第１図
に示す調光回路の具体的な回路構成を示す図、第
３図は発光ダイオードに印加される電圧の波形を
示す図、第４図は多数の発光ダイオードによつて
構成される電光表示装置の表示状態の一例を示す
図、第５図は従来における発光ダイオードの調光
回路の一例を示す回路構成図である。
３……交流電源、４……デユーテイサイクル可
変手段、５……リアクタンス回路、Ｄ，Ｄ１，Ｄ
２……発光ダイオード。
FIG. 1 is a circuit configuration diagram showing an embodiment of a light-emitting diode dimming circuit according to the present invention, FIG. 2 is a diagram showing a specific circuit configuration of the dimming circuit shown in FIG. 1, and FIG. A diagram showing the waveform of the voltage applied to the diode, FIG. 4 is a diagram showing an example of a display state of an electronic display device composed of a large number of light emitting diodes, and FIG. 5 is a diagram showing a conventional dimming circuit of a light emitting diode. FIG. 2 is a circuit configuration diagram showing an example. 3...AC power supply, 4...Duty cycle variable means, 5...Reactance circuit, D, D1 , D
2 ... Light emitting diode.
Claims (1)
信号を供給する交流電源３と、前記発光ダイオー
ドに流れる電流を制限するリアクタンス回路５と
、前記発光ダイオードに供給される駆動信号のデ
ユーテイサイクルを可変して前記発光ダイオード
の輝度を調節するデユーテイサイクル可変手段４
とを備えたこちを特徴とする発光ダイオードの調
光回路。 A light emitting diode D, an AC power supply 3 that supplies a drive signal to the light emitting diode, a reactance circuit 5 that limits the current flowing to the light emitting diode, and a variable duty cycle of the drive signal supplied to the light emitting diode. duty cycle variable means 4 for adjusting the brightness of the light emitting diode;
A light emitting diode dimming circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988112138U JPH0233465U (en) | 1988-08-29 | 1988-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988112138U JPH0233465U (en) | 1988-08-29 | 1988-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0233465U true JPH0233465U (en) | 1990-03-02 |
Family
ID=31350807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988112138U Pending JPH0233465U (en) | 1988-08-29 | 1988-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0233465U (en) |
-
1988
- 1988-08-29 JP JP1988112138U patent/JPH0233465U/ja active Pending