JPS5819897A - Dimming device - Google Patents
Dimming deviceInfo
- Publication number
- JPS5819897A JPS5819897A JP56120392A JP12039281A JPS5819897A JP S5819897 A JPS5819897 A JP S5819897A JP 56120392 A JP56120392 A JP 56120392A JP 12039281 A JP12039281 A JP 12039281A JP S5819897 A JPS5819897 A JP S5819897A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- conduction angle
- output voltage
- line
- circuit
- 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 6
- 238000005286 illumination Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Circuit Arrangement For Electric Light Sources In General (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
【発明の詳細な説明】
零発明け、照明灯による明るさを調節することができる
調光装置に＠する。[Detailed Description of the Invention] We have invented a light control device that can adjust the brightness of illumination lights.
先行技術では、照明灯に電力を供給する電源の出力電圧
が変動す、ると、明るさか変化して光のちらつきが生じ
る。このことは、特にたとえば写真の焼付装置などにお
いて重大な問題となる。In the prior art, when the output voltage of the power supply that powers the lamp fluctuates, the brightness changes and the light flickers. This poses a serious problem, particularly in, for example, photographic printers.
本発明の目的け、照明灯を電力付勢する電源の出力電圧
が変動しても光のちちつきが生じることのな−ようにし
た調光装置°を提供すみことである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a light control device which prevents flickering of light even if the output voltage of a power supply for energizing a lighting lamp varies.
＠１図社、本発明の一実施例の電気回路図である。商用
交流電源ｌからの電力は、照明灯２にスイッチング素子
としてのトライアック３を介して与えらｈる。このトラ
イアック３の導通角したがって照明灯２の調光レベルは
、ポテンショメータから成るフェーダ４かちライン５を
介する電圧によって定められる。フェーダ４Ｋｉ、直流
の一定電圧が電源３２から与えられている。フェーダ４
からの導通角に対応した電圧に、補償回路６において電
源ｌの出力電圧ＫＦ＞じて補償され、ライン７から導通
角制御手段８に与えられる。@1 Zusha is an electrical circuit diagram of an embodiment of the present invention. Electric power from a commercial AC power source 1 is applied to the lighting lamp 2 via a triac 3 as a switching element. The conduction angle of the triac 3 and thus the dimming level of the lamp 2 is determined by the voltage across the fader 4 and the line 5 consisting of a potentiometer. A constant DC voltage is applied to the fader 4Ki from the power supply 32. fader 4
The compensation circuit 6 compensates the output voltage KF of the power supply 1 to a voltage corresponding to the conduction angle from the line 7, and supplies the voltage to the conduction angle control means 8 from the line 7.
補償回路６において、電源ｌからの出力電圧に、出力電
圧検出回路９に含まれるトランスｌＯＫお論て電圧され
、全波整流回路１１において整流さｈ１コンデンサ１２
において平滑され、ライン１３から減算回路１４ｆｆ含
まれる演算増幅器１５の一方の入力に与えられる。ライ
ン５を介するフェーダ４からの電圧灯、演算増幅！１５
の他方の入力に与えられる。減算回路１４Ｆｉ、ライン
１６Ｋ。In the compensation circuit 6, the output voltage from the power supply 1 is applied to the transformer 1 included in the output voltage detection circuit 9, which is rectified in the full-wave rectifier circuit 11.
The signal is smoothed at the line 13 and applied to one input of the operational amplifier 15 included in the subtraction circuit 14ff. Voltage lamp from fader 4 via line 5, operational amplification! 15
is given to the other input of Subtraction circuit 14Fi, line 16K.
７エーダ４からのライン５を介する電圧ＶＦと、′出力
電圧検出回路９からのライン１３を介する電圧ＶＢとの
差ΔＶ（＝ＶＦ−ＶＢ）を導出する。ライン１６からの
電圧とフェーダ４からのライン５を介する電圧と社、加
算回路１７に与えられて加算される。こうして加算回路
１７からライン７に導出される信号の電圧に、電源ｌの
出力電圧が低くなって減算回路１４からの電圧ΔＶが大
きくなったとき、高くなる。また電源ｌの出力電圧が高
くなりしたがって減算回路１４からの電圧が電圧ΔＶが
小さくなったとき、加算回路１７からライン７に’４出
される電圧は低くなる。The difference ΔV (=VF-VB) between the voltage VF from the 7-editor 4 via the line 5 and the voltage VB from the output voltage detection circuit 9 via the line 13 is derived. The voltage from line 16 and the voltage from fader 4 via line 5 are applied to adder circuit 17 and added. In this way, the voltage of the signal derived from the adder circuit 17 to the line 7 becomes high when the output voltage of the power supply I becomes low and the voltage ΔV from the subtractor circuit 14 becomes large. Further, when the output voltage of the power source 1 becomes high and therefore the voltage ΔV of the voltage from the subtraction circuit 14 becomes small, the voltage '4 outputted from the addition circuit 17 to the line 7 becomes low.
導通角制御手段８に、ライン７の電圧が高いとき導通角
を大きくシ、その電圧が低いとき導通角を小さく制御す
る機能を有する。この導通角制御よって降圧され、全波
整流回路２０によって全波る分圧電圧か与えちｈる。比
較回路２１がらの出カケ、トランジスタ２４のペースに
４えちｈる。The conduction angle control means 8 has a function of increasing the conduction angle when the voltage of the line 7 is high and controlling the conduction angle to be small when the voltage is low. This conduction angle control lowers the voltage, and the full-wave rectifier circuit 20 provides a full-wave divided voltage. The output of the comparator circuit 21 and the pace of the transistor 24 are 4 times higher.
トランジスタ２ａＫ＃−ｔｓ積分形のコンデンサ２５カ
接続さｈており、このコンデンサ２５ｉｊライン７から
ダイオード２６を介する補償回路６からの出力によって
充電される。コンデンサ２５の出プ。A transistor 2aK#-ts integral type capacitor 25 is connected, and this capacitor 25ij is charged by the output from the compensation circuit 6 via the diode 26 from the line 7. Output of capacitor 25.
け、もう１つの比較回路２７の一方の入力に与えられる
。比較回路２７の他方の入力に灯、抵抗２８．２９によ
る分圧電圧が与えられる。比較回路２７からの出方は、
発光ダイオード３０に与えられる。発光ダイオード３ｏ
からの光は、光応答性を有するトライアック３１に与え
られる。このトライアック３１＃ｆ、照明灯２に直列に
接続さｈてイルトライアック３１を点弧ＩＪ御する。ト
ランジスタ２４ ｉｊ、電源ｌの出力電圧の半サイクル
毎にコンデンサ２５を放電させる。この放電；ｈたコン
ｆンｆ２５？１％ 補償回路６からライン７およびダイ
オード２６を介する信号によって充電される。and is applied to one input of another comparison circuit 27. The other input of the comparator circuit 27 is supplied with a voltage divided by the resistors 28 and 29. The output from the comparison circuit 27 is
is applied to the light emitting diode 30. light emitting diode 3o
The light from is given to a triac 31 having photoresponsiveness. This triac 31#f is connected in series to the illumination lamp 2 to control the ignition IJ of the illumination triac 31. Transistor 24 ij discharges capacitor 25 every half cycle of the output voltage of power supply l. This discharge is charged by a signal from the compensation circuit 6 via the line 7 and the diode 26.
したがってライン７の信号レベルＫｆ５じて、コンデン
サ２５の充電速度が変化し、これによって電Ｍｌの出力
電圧の半サイクル毎におｆｆル発光グイ、５−オード３
ｏの点灯時開が制御される。ライン７の信号の電圧が高
けｈば、コンデンサ２５の充電速度が大きく、シたがっ
て電源ｌの出力の各半サイクル毎における発光ダイオー
ド３ｏの点灯期間が長くなり、応じてサイリスタ３の導
通角が大綱くなる。Therefore, depending on the signal level Kf5 on line 7, the charging speed of capacitor 25 changes, so that every half cycle of the output voltage of electric current M1 is
o is controlled to open when lit. The higher the voltage h of the signal on line 7, the faster the charging rate of capacitor 25 is and therefore the longer the lighting period of light-emitting diode 3o in each half cycle of the output of power supply l, and the conduction angle of thyristor 3 is accordingly longer. becomes the outline.
第２図は、電源ｌの出力電力波形を示す。実線で示され
る電源ｌの出力電圧ＥＯが生じているとき、時ＪＥＩＪ
ｔＯ，ｔＯａｉｃおいてトライアック３が導通し、した
がって導通角けＷＯである。電源ｌの出力電圧ＥＯが低
くなって第２図の参照符Ｅ１で示されるようＫなったと
き、補償回路６Ｆｉフエーダ４からのライン５を介する
電圧を高くシ、これによってトライアック３は時刻Ｅｌ
、ｔｌ畠にお−て導通し、導通角Ｗｉｔ−ｊ大きくなる
。電源ｌの出力電圧が参照符Ｅ２で示すように高く変化
したときＫに、補償回路６＃′ｊフエーダ４かちライン
５を介する電圧を低く補償し、こｈＫよってトライアッ
ク３け時刻ｔ２．ｔ２！Ｉｆｆおいて導通し、したがっ
て導通角Ｗ２か小さくかふ。このようにして電源ｌの出
力電圧の変−動に応じて導通角が補償さり、照明灯２の
光のちらり負が防がれみ。FIG. 2 shows the output power waveform of power supply l. When the output voltage EO of the power supply l shown by the solid line is occurring, the time JEIJ
At tO, tOaic, the triac 3 becomes conductive, and therefore the conduction angle WO. When the output voltage EO of the power supply l becomes low and becomes K as indicated by reference numeral E1 in FIG.
, tl conduction occurs, and the conduction angle Wit-j increases. When the output voltage of the power supply l changes to a high value as shown by reference symbol E2, the compensation circuit 6#'j compensates the voltage across the fader 4 and the line 5 to a low value, thereby increasing the triac 3 at time t2. t2! Conduction occurs at Iff, so the conduction angle W2 is small. In this way, the conduction angle is compensated according to fluctuations in the output voltage of the power source 1, and the light from the illumination lamp 2 is prevented from flickering.
照明灯２Ｆｉ、白熱灯や放電灯などであってもよいＯ
以上のように未発明ｆよれば、電源の出力電圧が低くな
ると照明灯に直列に接続さｈているスイッチング素子の
導通角が大きくなるようにされるので、照明灯２の明る
さを電源の出力電圧の変動Ｋかかわらず希望する明るさ
に保つことができ、光のちらつきがなくなる。The illumination lamp 2Fi may be an incandescent lamp, a discharge lamp, etc.O As described above, according to the uninvented invention, when the output voltage of the power supply decreases, the conduction angle of the switching element connected in series with the illumination lamp increases. Therefore, the brightness of the illuminating lamp 2 can be maintained at a desired level regardless of fluctuations in the output voltage of the power source, and flickering of the light can be eliminated.
第１同社本発明の一実施例の電気回路図、第２同はその
動作を説明するための波形図であみ。
ｌ・・・電源、２・・・照明灯、３・・・トライアック
、４・・・フェーダ、６・・・補償回路、８・・・導通
角制御手段、９・・・出力電圧検出回路、１４・・・減
算回路、１７・・・加算回路
代理人 弁理士 西教圭一部The first one is an electric circuit diagram of an embodiment of the present invention, and the second one is a waveform diagram for explaining its operation. 1... Power supply, 2... Lighting lamp, 3... Triac, 4... Fader, 6... Compensation circuit, 8... Continuity angle control means, 9... Output voltage detection circuit, 14...Subtraction circuit, 17...Addition circuit Agent Patent attorney Kei Nishi
Claims (1)
、 スイッチング素子が導通する導通角に対応した電気信号
を発生する手段と、 前記電気信号に応答して、その電気信号に対応した導通
角でスイッチング素子を導通させる導通角制御手段と、 電源の出力電圧に応答し、出力電圧が低いときに導通角
が大きくなるよう虻前記電気信号を補償する手段とを含
むことを特徴とする調光装置。[Scope of Claims] A power source; a lighting lamp; a switching element connected in series to the power source and the lighting lamp; means for generating an electrical signal corresponding to a conduction angle at which the switching element conducts; conduction angle control means that responds to the electrical signal and conducts the switching element at a conduction angle corresponding to the electrical signal; and responds to the output voltage of the power supply and compensates the electrical signal so that the conduction angle increases when the output voltage is low. A light control device characterized by comprising means for:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56120392A JPS5819897A (en) | 1981-07-30 | 1981-07-30 | Dimming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56120392A JPS5819897A (en) | 1981-07-30 | 1981-07-30 | Dimming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5819897A true JPS5819897A (en) | 1983-02-05 |
Family
ID=14785066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56120392A Pending JPS5819897A (en) | 1981-07-30 | 1981-07-30 | Dimming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5819897A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60214024A (en) * | 1984-04-09 | 1985-10-26 | Internatl Rectifier Corp Japan Ltd | Alternating current power controller |
-
1981
- 1981-07-30 JP JP56120392A patent/JPS5819897A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60214024A (en) * | 1984-04-09 | 1985-10-26 | Internatl Rectifier Corp Japan Ltd | Alternating current power controller |
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