JPS5919436B2 - discharge lamp dimmer - Google Patents
discharge lamp dimmerInfo
- Publication number
- JPS5919436B2 JPS5919436B2 JP8287379A JP8287379A JPS5919436B2 JP S5919436 B2 JPS5919436 B2 JP S5919436B2 JP 8287379 A JP8287379 A JP 8287379A JP 8287379 A JP8287379 A JP 8287379A JP S5919436 B2 JPS5919436 B2 JP S5919436B2
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- voltage
- capacitor
- variable resistor
- resistance value
- 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.)
- Expired
Links
Landscapes
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Description
【発明の詳細な説明】
本発明は、不安定放電領域での点灯を防止した放電灯調
光装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge lamp dimming device that prevents lighting in an unstable discharge region.
一般用として使用される調光装置においては、通常（１
）照度は１００−０．５％までスムーズに調整可能なこ
と。In the light control device used for general purpose, usually (1
) Illuminance can be smoothly adjusted from 100% to 0.5%.
（２）調光器を絞ヤ切つた時には照度は完全に零になる
こと。(2) When the dimmer is turned off, the illuminance must be completely zero.
という条件が満たされることが要求される。It is required that the following conditions be met.
しかしながら、サイリスタ等の半導体素子を用いた位相
制御方式によつて出力を調整し、これによつて放電灯の
点灯と調光を行なう場合、出力を絞わ込んで最大照度の
０．５％程度以下になつてもすぐには消灯せず、放電が
不安定になつて、放電灯がちらついたヤ、リングが走つ
たヤしやすくなク、視覚上非常に具合が悪く、また精神
的にも良くない感じを与えるものであつた。第１図は、
一般的な放電灯調光装置の回路を示すもので、１は電源
、２は調光回路、３は限流要素たる安定器、４は螢光灯
等の放電灯であり、電源電圧が同期トランスＴに印加さ
れるとダイオードブリッジＤＢを通してコンデンサＣと
可変抵抗ＶＲとの値に応じた時定数によりコンデンサＣ
が充電され、その電位がプログラマプル、ユニジヤンク
シヨン、トランジスタＰＵＴのゲート電圧以上になると
プログラマプル、ユニジヤンクシヨン。However, when the output is adjusted using a phase control method using semiconductor elements such as thyristors to light up and dim the discharge lamp, the output is reduced to about 0.5% of the maximum illuminance. The light does not turn off immediately even when the temperature drops below, and the discharge becomes unstable, causing the discharge lamp to flicker, the ring to run easily, and it is visually very unwell, and also to cause mental problems. It gave me a bad feeling. Figure 1 shows
This shows the circuit of a general discharge lamp dimmer. 1 is a power supply, 2 is a dimmer circuit, 3 is a ballast which is a current limiting element, and 4 is a discharge lamp such as a fluorescent lamp, and the power supply voltage is synchronized. When the voltage is applied to the transformer T, the voltage is applied to the capacitor C through the diode bridge DB with a time constant depending on the values of the capacitor C and the variable resistor VR.
is charged and its potential exceeds the gate voltage of the programmable transistor PUT.
トランジスタＰＵＴは導通して半サイクル毎にその位相
角でパルス信号を発生する。なお同期トランスＴの２次
側に接続されたダイオードブリッジＤＢの直流出力側に
平滑コンデンサを接続していないのは、コンデンサＣを
交流電源電圧の零電圧レベルからの電圧上昇にほぼ同期
して充電開始させるためであることは周知の通ヤである
。この信号はトライアツクＱ２のゲートに伝達され、ト
ライアツクＱ２を点弧時点からその半サイクルの最後ま
で導通させる。従つて主トライアツクＱ７のゲートには
位相角からその半サイクル中信号が加わク、安定器３に
位相制御された電圧が印加される。ここで、調光器２の
位相制御角の変化すなわち調光操作は、可変抵抗ＶＲの
操作による抵抗変化によつて訃シ、抵抗値が小さい程明
るくな）、大きくなる程暗くなるのであるが、抵抗値が
連続的に変化するので照度が０．５％以下になつても、
主トライアツクＱ，からは出力パルスが出て放電灯４は
すぐには消灯せず、前述のような不安定領域での放電が
行なわれることになるのである。本発明は、このような
従来の装置における問題点を解決するためになされたも
のであり、所定の最低照度以下では出力を零にして不安
定放電領域での動作を完全に停止し、不安定な点灯状態
が持続することのないようにしたものであう、以下実施
例について説明する。第２図は本発明の実施例に使用す
る可変抵抗器の特性と構成を示すもので、５，６は固定
端子、７は摺動端子であ）、固定端子６側には絶縁処理
部８が設けてある。Transistor PUT conducts and generates a pulse signal at that phase angle every half cycle. Note that the reason why a smoothing capacitor is not connected to the DC output side of the diode bridge DB connected to the secondary side of the synchronous transformer T is that the capacitor C is charged almost in synchronization with the voltage rise from the zero voltage level of the AC power supply voltage. It is a well-known fact that the purpose is to get people started. This signal is transmitted to the gate of triac Q2, causing it to conduct from the moment of firing until the end of its half cycle. Therefore, the gate of the main triac Q7 receives a signal from the phase angle during its half cycle, and a phase-controlled voltage is applied to the ballast 3. Here, the change in the phase control angle of the dimmer 2, that is, the dimming operation, is caused by the change in resistance caused by the operation of the variable resistor VR (the smaller the resistance value, the brighter the light), and the larger the resistance value, the darker the light becomes. , since the resistance value changes continuously, even if the illuminance drops to 0.5% or less,
An output pulse is output from the main triax Q, and the discharge lamp 4 does not go out immediately, but discharge occurs in the unstable region as described above. The present invention was made to solve these problems in conventional devices, and it completely stops operation in the unstable discharge region by reducing the output to zero below a predetermined minimum illuminance, thereby eliminating the instability. An example will be described below that is designed to prevent the lighting state from continuing. FIG. 2 shows the characteristics and structure of the variable resistor used in the embodiment of the present invention. 5 and 6 are fixed terminals, 7 is a sliding terminal), and the fixed terminal 6 side has an insulation treatment part 8. is provided.
固定端子５と摺動端子７間の抵抗値は、例えば摺動率Ｓ
に比例して変化するＢ型となつているが、摺動端子７が
絶縁処理部８に来ると、両端子５，７間の抵抗値Ｒが無
限大になるようにしてある。この絶縁処理部８は抵抗体
上に絶縁塗料を塗布し、あるいは抵抗体自身の端部を絶
縁物とする等の方法によ）形成される。また抵抗値Ｒは
、摺動端子７が絶縁処理部８に達するまでの摺動範囲Ａ
が丁度所定の照度調整範囲に対応するように選んである
。本実施例では以上のような可変抵抗器を用い、固定端
子５と摺動端子７間を第１図における調光回路２の可変
抵抗ＶＲとして使用する。The resistance value between the fixed terminal 5 and the sliding terminal 7 is, for example, the sliding rate S.
However, when the sliding terminal 7 reaches the insulation treatment section 8, the resistance value R between the terminals 5 and 7 becomes infinite. The insulating portion 8 is formed by applying an insulating paint onto the resistor or by making the ends of the resistor itself an insulator. In addition, the resistance value R is the sliding range A until the sliding terminal 7 reaches the insulation treatment part 8.
is selected to exactly correspond to a predetermined illuminance adjustment range. In this embodiment, the variable resistor as described above is used, and the space between the fixed terminal 5 and the sliding terminal 7 is used as the variable resistor VR of the dimming circuit 2 in FIG.
すなわち、第１図の回路において、可変抵抗ＶＲの抵抗
値が大きくなるにつれてコンデンサＣの充電時間が遅れ
、それに応じて主トライアツクＱ１の点弧位相が遅れて
出力が絞られ、放電灯４は暗くなつて行くが、摺動範囲
Ａを過ぎて摺動端子７が絶縁処理部８に達すると抵抗値
が無限大とな虱コンデンサＣへの充電がなされず、主ト
ライアツクＱ，は不導通のままとなシ、放電灯４は消灯
する。第３図Ａ，ｂは可変抵抗ＶＲの抵抗値（摺動率Ｓ
）と照度Ｌとの関係を示すもので、ａは絶縁処理部を設
けてない従来の可変抵抗器を用いた場合、ｂは本実施例
の場合である。従来例においては、摺動率Ｓを増加して
照度Ｌを低下して行き、不安定領域Ｎに入つても不安定
な放電が続いてなかなか放電が完全には停止しないが、
本実施例においては摺動薄囲Ａにおいてはスムーズな照
度変化がなされ、不安定領域Ｎに入ると出力が零となつ
て放電灯４は完全に消灯するのであり、可変抵抗器の簡
単な改良によつて不安定な放電が持続されることが防止
されるのである。本発明は以上のように構成されており
、放電灯を位相制御によつて調光制御する半導体スイツ
チを設けて、位相制御回路におけるコンデンサに直列に
接続された充電電流制限用の可変抵抗器の抵抗値特性を
、抵抗値が放電灯の不安定放電領域よりも出力が大きい
領域における放電灯の最低照度に対応する値を越えると
、抵抗値が無限大になるような特性に設定したものであ
るから、所定の最低照度以下では出力を零にして不安定
放電領域での点灯を防止することができ、所定外の低照
度におけるちらつきやリング走シを防止し、視覚的にあ
るいは精神的に不快な感じをなくすことができるのであ
る。That is, in the circuit shown in FIG. 1, as the resistance value of the variable resistor VR increases, the charging time of the capacitor C is delayed, and accordingly, the ignition phase of the main triac Q1 is delayed, the output is throttled, and the discharge lamp 4 becomes dark. However, when the sliding terminal 7 passes the sliding range A and reaches the insulating part 8, the resistance value becomes infinite.The capacitor C is not charged, and the main triax Q remains non-conducting. Then, the discharge lamp 4 goes out. Figure 3 A and b show the resistance value (sliding rate S) of the variable resistor VR.
) and the illuminance L, where a is the case when a conventional variable resistor without an insulation treatment part is used, and b is the case of this embodiment. In the conventional example, the sliding rate S is increased and the illuminance L is decreased, and even when entering the unstable region N, unstable discharge continues and the discharge does not completely stop.
In this embodiment, the illuminance changes smoothly in the sliding thin area A, and when it enters the unstable region N, the output becomes zero and the discharge lamp 4 is completely turned off.This is a simple improvement of the variable resistor. This prevents unstable discharge from continuing. The present invention is constructed as described above, and includes a semiconductor switch for controlling the dimming of a discharge lamp by phase control, and a variable resistor for limiting charging current connected in series with a capacitor in a phase control circuit. The resistance value characteristics are set so that when the resistance value exceeds the value corresponding to the lowest illuminance of the discharge lamp in the region where the output is greater than the unstable discharge region of the discharge lamp, the resistance value becomes infinite. Therefore, it is possible to reduce the output to zero below a predetermined minimum illuminance to prevent lighting in an unstable discharge area, prevent flickering and ring running at unspecified low illuminance, and improve visual and mental health. It can eliminate the unpleasant feeling.
第１図は一般的な放電灯の調光装置の回路図、第２図Ａ
，ｂは本発明の一実施例における可変抵抗器の特性およ
び構成を示す図、第３図は可変抵抗器の摺動率と照度と
の関係を示す図でａは従来例、ｂは本発明の実施例であ
う、１は電源、２は調光回路、３は安定器、４は放電灯
、７は摺動端子、８は絶縁処理部、Ｒは可変抵抗器、Ｃ
はコンデンサ、Ｑｌ，Ｑ，はトライアツク、ＰＵＴはプ
ログラマブル．ユニジヤンクシヨン．トランジスタであ
る。Figure 1 is a circuit diagram of a general discharge lamp dimming device, Figure 2A
, b are diagrams showing the characteristics and configuration of a variable resistor in an embodiment of the present invention, and FIG. 3 is a diagram showing the relationship between sliding ratio and illuminance of a variable resistor, in which a is a conventional example and b is a diagram of the present invention. In this embodiment, 1 is a power supply, 2 is a dimming circuit, 3 is a ballast, 4 is a discharge lamp, 7 is a sliding terminal, 8 is an insulation processing section, R is a variable resistor, and C
is a capacitor, Ql and Q are triacs, and PUT is programmable. Unification. It is a transistor.
Claims (1)
かつ両端電圧が零になるまで導通を自己保持する双方向
性の半導体スイッチと、放電灯と、限流要素との直列閉
回路を交流電源に接続し、交流電源電圧の零電圧レベル
からの電圧上昇にほぼ同期して充電開始されるコンデン
サと、コンデンサに直列に接続されてコンデンサへの充
電電流を制限する可変抵抗器と、コンデンサの充電電圧
が所定の基準値を越えたときに導通して前記半導体スイ
ッチをトリガするスイッチング要素とを有する位相制御
回路を設けて、可変抵抗器の抵抗値調整特性を、抵抗値
が放電灯の不安定放電領域よりも出力が大きい領域にお
ける放電灯の最低照度に対応する値を越えると、抵抗値
が無限大になるような特性に設定して成ることを特徴と
する放電灯調光装置。1 conduction by applying a trigger pulse to the gate electrode,
A series closed circuit consisting of a bidirectional semiconductor switch that self-maintains continuity until the voltage at both ends becomes zero, a discharge lamp, and a current limiting element is connected to an AC power supply, and the voltage from the zero voltage level of the AC power supply voltage is A capacitor that starts charging almost in synchronization with the rising voltage, a variable resistor that is connected in series with the capacitor to limit the charging current to the capacitor, and a variable resistor that becomes conductive when the charging voltage of the capacitor exceeds a predetermined reference value. A phase control circuit having a switching element that triggers the semiconductor switch is provided, and the resistance value adjustment characteristic of the variable resistor is adjusted to the minimum illuminance of the discharge lamp in a region where the resistance value is larger than the unstable discharge region of the discharge lamp. 1. A discharge lamp dimmer characterized in that the resistance value is set to infinity when the value corresponding to is exceeded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8287379A JPS5919436B2 (en) | 1979-06-30 | 1979-06-30 | discharge lamp dimmer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8287379A JPS5919436B2 (en) | 1979-06-30 | 1979-06-30 | discharge lamp dimmer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS567395A JPS567395A (en) | 1981-01-26 |
| JPS5919436B2 true JPS5919436B2 (en) | 1984-05-07 |
Family
ID=13786407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8287379A Expired JPS5919436B2 (en) | 1979-06-30 | 1979-06-30 | discharge lamp dimmer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5919436B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6452537A (en) * | 1987-08-20 | 1989-02-28 | Mitsui Petrochemical Ind | Floor carpet of vehicle |
-
1979
- 1979-06-30 JP JP8287379A patent/JPS5919436B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6452537A (en) * | 1987-08-20 | 1989-02-28 | Mitsui Petrochemical Ind | Floor carpet of vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS567395A (en) | 1981-01-26 |
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