JPS5875797A - Device for dimming discharge lamp - Google Patents
Device for dimming discharge lampInfo
- Publication number
- JPS5875797A JPS5875797A JP17271081A JP17271081A JPS5875797A JP S5875797 A JPS5875797 A JP S5875797A JP 17271081 A JP17271081 A JP 17271081A JP 17271081 A JP17271081 A JP 17271081A JP S5875797 A JPS5875797 A JP S5875797A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- gate
- power supply
- ballast
- voltage
- 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.)
- Granted
Links
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (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】
本発明は、ピーク値を必要とする位相制御装置に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a phase control device that requires a peak value.
従来制御方式を＠１図に、その各部波形を第２図に示す
。The conventional control system is shown in Figure 1, and the waveforms of each part are shown in Figure 2.
この方式は、電源と同期しである時間後ｔａに、ゲート
信斧発生回路より、第２図に示す１点弧パルス９を出し
て、トライ１ツク２を導通し安定器に１０の電圧を印加
して、放電灯を調光する。しかし、点弧角が９０°’を
越えると、安定器に印加される電圧が、１０のｔｂ後の
波形で示す様に電圧のビーフ値が△■だけ低下する。一
般に放電灯は高ｈランプ再点弧電圧が必要の為、電圧の
ピークｔＮが低ドしてくると安定な放電を維持すること
が出来なくなり、チラッキが発生しなり、立消えたりす
る。This method is synchronized with the power supply, and after a certain time ta, a one-firing pulse 9 shown in FIG. to dim the discharge lamp. However, when the firing angle exceeds 90°', the voltage applied to the ballast decreases by Δ■ as shown in the waveform after 10 tb. Generally, discharge lamps require a high lamp restriking voltage, so when the voltage peak tN decreases, stable discharge cannot be maintained, flickering occurs, and the lamp goes out.
点弧角が９０°以下の場合、ランプ電流が零になってか
ら、電圧が印加するまでの時間が短す為、放電μ内の熱
電子の残存により再点弧電圧が比較的低くてすむので安
定な放電を維持してｈる。When the firing angle is 90° or less, the time from when the lamp current becomes zero until the voltage is applied is short, so the restriking voltage is relatively low due to the residual thermoelectrons in the discharge μ. Therefore, stable discharge is maintained for hours.
本発明の目的は、安定な放電灯の調光を行うことにある
。An object of the present invention is to perform stable dimming of a discharge lamp.
本発明は、調光を行う安定器に印加する電圧の夾効値が
低ドしても、放電灯には常にピーク電圧を追加させて安
定制御するものである。In the present invention, even if the effective value of the voltage applied to the ballast that performs dimming is low, a peak voltage is always added to the discharge lamp to perform stable control.
本発明の実施例を１８５図に、各部波形を第４図に示す
。An example of the present invention is shown in FIG. 185, and waveforms of various parts are shown in FIG.
本制御回路は、交流電源１２と安定器１６の間に全波整
流器１３を通してゲートタンオフサイリスタ１４をもち
いて位相制御を行うものである。This control circuit performs phase control using a gate turn-off thyristor 14 that is passed through a full-wave rectifier 13 between an AC power supply 12 and a ballast 16.
主制御素子であるゲートタンオフサイリスタ１４の特性
は、ゲートに順方向パルスを印加すると導通し、逆に、
ゲートに逆バイアスパルスを印加すると通電電流をしゃ
断して非導通になる。ゲート信号発生回路は１位相角９
０°を中心にして、それ以前の位相角で順方向のパルス
を、９０°以後の位相角で逆方向のパルスを印加する。The characteristics of the gate turn-off thyristor 14, which is the main control element, are that when a forward pulse is applied to the gate, it becomes conductive;
When a reverse bias pulse is applied to the gate, the conduction current is cut off and the gate becomes non-conducting. Gate signal generation circuit has 1 phase angle 9
A forward pulse is applied at a phase angle before 0°, and a reverse pulse is applied at a phase angle after 90°.
回路動作は、交流電源２０の零電位からｔ、後に順方向
パルス２１を印加すると、グートタンオフサイリスター
１４が導通し、全波整流器１３を通して安定器１６に電
圧が印加される。導通後、位相角９０１過してｔ（１後
Ｋ、逆方向ゲートパルスを印加すると、ゲートタンオフ
サイリスタ１４は非導通にナリ、安定器１６ＩＣは、波
形２２の電圧が印加される。In circuit operation, when the forward pulse 21 is applied after t from the zero potential of the AC power supply 20, the Guthton-off thyristor 14 becomes conductive, and a voltage is applied to the ballast 16 through the full-wave rectifier 13. After conduction, when the phase angle 901 has passed and a reverse direction gate pulse is applied after t(1), the gate turn-off thyristor 14 remains non-conductive, and the voltage of waveform 22 is applied to the ballast 16IC.
安定器１６０入力電圧を低くして調光するには。To dim the light by lowering the ballast 160 input voltage.
点弧位相をｔｃより長（ｔｆにし、しゃ断位相もｔｄか
ら短かくしてｔｇにする。この為、位相角９０°の最も
交流電源１２の最大値の電圧ｖｐが常に印加されること
により、放電灯１９が安定に放電維持する。The ignition phase is longer than tc (tf), and the cutoff phase is also shorter than td to tg. Therefore, the maximum voltage vp of the AC power supply 12 with a phase angle of 90° is always applied, and the discharge lamp 19 maintains stable discharge.
従って、放電灯の調光を安定にする効果がある。Therefore, there is an effect of stabilizing the dimming of the discharge lamp.
第４図は、ゲートパルス波形図テある。
１３・・・全波整流器、１４・・ゲートタンオフサイリ
スタ、１５・・・ゲート信号発生回路、１６・・・安定
ｉ、”１７・・・コンデンサ、１９川フイラメントコイ
ル、１９・・・放電灯。
代理人 弁理士 薄 １） 利 幸叶１図
寸Ｚ図
叶３図FIG. 4 is a diagram of the gate pulse waveform. 13...Full wave rectifier, 14...Gate turn-off thyristor, 15...Gate signal generation circuit, 16...Stable i, 17...Capacitor, 19 River filament coil, 19...Discharge lamp .Representative Patent Attorney Susuki 1) Tori Yukio 1 size Z size Kano 3 size
Claims (1)
、安定器と電源の間に位相制御回路を設け、位相制御回
路の主制御素子には、ゲートタンオフサイリスタを用い
、そのゲート信号発生回路は、位相角９００を中心にし
て、０〜９０００間で点弧パルスを出して導通し、９０
°−１８０°の間でターンオフゲートバＶスを印加して
非導通にして、導通角を制御することを特徴とする放電
灯調光装置。An AC power supply, a discharge lamp and a ballast connected to this power supply, and a phase control circuit are provided between the ballast and the power supply, and a gate turn-off thyristor is used as the main control element of the phase control circuit, and its gate signal The generating circuit generates a firing pulse between 0 and 9000 with a phase angle of 900 as the center to conduct.
A discharge lamp dimmer characterized in that the conduction angle is controlled by applying a turn-off gate bus V bus between ° and 180 ° to make it non-conductive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17271081A JPS5875797A (en) | 1981-10-30 | 1981-10-30 | Device for dimming discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17271081A JPS5875797A (en) | 1981-10-30 | 1981-10-30 | Device for dimming discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5875797A true JPS5875797A (en) | 1983-05-07 |
| JPS6249718B2 JPS6249718B2 (en) | 1987-10-21 |
Family
ID=15946899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17271081A Granted JPS5875797A (en) | 1981-10-30 | 1981-10-30 | Device for dimming discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5875797A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6097599A (en) * | 1983-11-02 | 1985-05-31 | アレツクス工業株式会社 | Device for dimming discharge lamp |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0496022U (en) * | 1991-01-14 | 1992-08-20 | ||
| JPH06160123A (en) * | 1992-11-13 | 1994-06-07 | Nippon Seiki Co Ltd | Display panel with el |
-
1981
- 1981-10-30 JP JP17271081A patent/JPS5875797A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6097599A (en) * | 1983-11-02 | 1985-05-31 | アレツクス工業株式会社 | Device for dimming discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6249718B2 (en) | 1987-10-21 |
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