JP3845983B2 - Lighting device - Google Patents
Lighting deviceInfo
- Publication number
- JP3845983B2 JP3845983B2 JP29428297A JP29428297A JP3845983B2 JP 3845983 B2 JP3845983 B2 JP 3845983B2 JP 29428297 A JP29428297 A JP 29428297A JP 29428297 A JP29428297 A JP 29428297A JP 3845983 B2 JP3845983 B2 JP 3845983B2
- Authority
- JP
- Japan
- Prior art keywords
- duty
- control signal
- ballast
- discharge lamp
- ballasts
- 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 - Fee Related
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Description
【0001】
【発明の属する利用分野】
本発明は照明装置に関するものであり、更に詳しくは、複数の安定器を単一の制御装置で一括制御する照明装置に関する。
【0002】
【従来の技術】
本発明に係る第1の従来例のブロック構成図を図1に、その動作波形図を図9に示す。
【0003】
本ブロックは、入力信号の変化に応じてレベルが変化する制御信号を出力する制御装置からの信号線に、互いに並列に複数の安定器1、2・・・n(nは正の整数)が接続され、各々の安定器1、2・・・nの負荷として放電灯(以下、ランプと呼ぶ。)1、2・・・nが接続されている。また、安定器1、2・・・nは電源線にも互いに並列に接続されている。そして、制御装置から信号線を介して各々の安定器に制御信号が出力されることにより、各々の安定器に接続されたランプ出力を制御する。ここで、制御信号は、例えば図6に示す様にon−Dutyを変化させるものがある。
【0004】
ここで、例えば、制御装置への入力信号(フェーダーボリューム)の目盛りに応じて制御信号のon−Dutyが0%から100%まで変化することによって、図6に示す様な矩形波状の制御信号のon−Dutyを0%から100%まで変化させ、つまり、各安定器はランプの光出力を0%(消灯)から100%(全点灯)まで調光制御させることができるとする。
【0005】
ランプはあるレベル以下の低光束では点灯状態を維持することは困難であるため、通常、図8に示す様に、調光レベルが数%になると消灯するように制御されている。すなわち、ランプは、制御信号のon−DutyがSi以上で消灯、Si以下で点灯、Siよりも小さい場合にはon−Dutyの増加とともに光出力は低下させる様に制御する。
【0006】
しかし、図7に示す様な、制御装置への入力信号(フェーダーボリューム)に対して単調かつ緩やかなカーブを持つ制御信号を用いて複数の安定器を同時に制御する場合、図9に示す様に、消灯/点灯の切り替え動作を行なう制御信号レベルが、各々の安定器毎にS1、S2、・・・・、Snとばらつくと、フェーダーボリュームの目盛りがV1、V2、・・・・、Vnで各々の安定器が消灯/点灯の切り替え動作を行なうことになる。すなわち、複数の安定器を単一の制御信号にて制御する場合、各々の安定器間の制御信号レベルSiのばらつきによって、各々のランプの消灯/点灯の切り替えタイミングにぱらつきが生じてしまう、という第1の問題点が生じてしまう。
【0007】
上記第1の問題点を解決する手段として、制御信号レベルS1、S2、・・・・.Snの中で最も小さいレベルSmin以下の信号レベルSaにて安定器への電源を強制的に遮断することにより消灯動作を行う、という、本発明に係る第2の従来例があった。
【0008】
【発明が解決しようとする課題】
しかし、通常、ランプは、消灯状態から点灯状態への移行時すなわち始動時に、ランプフィラメントの予熱時間が必要となる。つまり、上記第2の従来例では、点灯するのに1秒前後の予熱時間が必要となり、応答性が悪くなってしまう、という第2の問題点が生じてしまう。
【0009】
なお、ランプを瞬時に点灯せしめるためには、消灯時にもフィラメントに予熱電流を与えておけぱ良い。そのためには安定器への電源を供給し続ける必要があるが、上記第1及び第2の従来例では、安定器の制御信号レベルのぱらつきによって、ランプの消灯/点灯の切り替えタイミングにぱらつきが生じてしまう、という第3の問題点も生じてしまう。
【0010】
本発明は、上記全ての問題点に鑑みてなされたものであり、その目的とするところは、複数の安定器を単一の制御装置で一括制御する照明装置において、安定器への電源供給を遮断することなく、安定器の制御信号レベルのぱらつきに関係なく、一斉にランプの消灯/点灯の切り替えを行なうことが可能な照明装置を提供することである。
【0011】
【課題を解決するための手段】
上記問題点を解決するために、請求項1記載の発明によれば、入力信号が大レベルから小レベルへと変化すると矩形波のon−Dutyが0%から100%へと変化する制御信号と、前記制御信号を出力する制御装置と、信号線を介して前記制御装置に互いに並列接続される複数の安定器と、前記各安定器の出力端に接続され前記on−Dutyが0%から100%へと変化すると、より調光される放電灯とを備え、前記複数の安定器は、ばらつきを有することにより、それぞれの放電灯を消灯させるon−Dutyが異なっており、前記複数の安定器のうち、最も先に放電灯を消灯させる安定器に第1のon−Dutyが対応し、最も後に放電灯を消灯させる安定器に第2のon−Dutyが対応するとともに、前記第1のon−Dutyよりも小さい第3のon−Dutyと前記第2のon−Dutyよりも大きい第4のon−Dutyを設定し、前記on−Dutyを100%から前記第3のon−Dutyまでは緩やかに変化させ、その後、第3のon−Dutyから第4のon−Dutyに急峻に変化させることを特徴とする。
【0012】
請求項2記載の発明によれば、前記放電灯の消灯時に、前記放電灯が即時始動するのに十分な予熱電流を前記放電灯のフィラメントに供給することを特徴とする。
【0013】
請求項3記載の発明によれば、前記入力信号は、DC電圧であることを特徴とする。
【0020】
【実施の形態】
(実施の形態1)
本発明に係る第1の実施の形態のブロック構成図は図1と同様であり、その動作のみが異なるので、第1の実施の形態の動作波形図を図2に示し、その他の従来例と同一構成には同一符号を付すことにより説明を省略する。
【0021】
ここで、前記制御信号のレベルS1、S2、・・・Snの中で最小のon−DutyのものをSmin、最大のものをSmaxとする。そして、Sa≦Smin、Sb≧SmaxなるSaおよびSbを任意に決定する。
【0022】
図2(a)は、制御信号(on−Duty)と光出力との関係を示し、図2(b)は、制御信号(on−Duty)と制御装置入力(フェダーボリュームの目盛り)との関係を示している。on−DutyがSa以下では、制御装置入力の変化に対して制御信号は緩やかかつ単調に変化するものとし、Saにおいて入力信号の僅かな変化に対してSbまで制御信号が急峻に変化する様に設定する。なお、従来との比較のため、従来の制御装置入力に対する制御信号の関係を図2(b)の破線で示し、本実施の形態に係る制御装置入力に対する制御信号の関係を図2(b)の実線で示す。なお、on−DutyがSa以下の制御装置入力に対する制御信号の関係のカーブは図7の限りではなく、任意の曲線であっても構わない。
【0023】
次に、図2を参照して動作を簡単に説明する。
制御装置入力をゆっくりとMAXレベルからMINレベルまで動かし、放電灯の出力を100%〜0%まで制御すると、MAXレベルではon−Duty=0%、ランプの光出力は最大(100%)となる。図2(b)の破線に示す様な従来の場合、安定器毎の制御信号レベルのばらつきS1、S2、・・・・、Snのため、ボリュームレベルV1、∨2、・・・、Vnのばらつきが発生するが、図2(b)の実線に示す本実施の形態の場合、上述の様に設定した為、ボリュームレベルがM(MAX>M>MIN)の点でSaからSbに急峻に変化し、安定器毎の制御信号レベルのばらつきS1、S2、・・・・、Snに関係なく、ボリュームレベルMにて安定器は一斉に消灯動作に入りランプは一斉に消灯する。
【0024】
(実施の形態2)
本発明に係る第2の実施の形態の動作波形図を図3に示す。
【0025】
図2に示した第1の実施の形態と異なる点は、on−Dutyが0%からSaに変化する迄に、on−Duty=Smax時のランプの光出力に達し、on−DutyがSaからSbに変化する間はランプの光出力は略一定になる様な、調光カーブに設定したことであり、その他の第1の実施の形態と同一構成には同一符号を付すことにより説明を省略する。
【0026】
この様に構成したことにより、制御信号レベルSiのばらつきが最も大きい安定器の最低出力時に、全ての安定器は一斉に消灯動作に入りランプは一斉に消灯することができるので、より広い調光範囲を得ることができる。なお、本実施の形態においては、ボリュームレベルがMからMINの範囲では、on−Duty=Sbと固定しても構わない。
【0027】
(実施の形態3)
本発明に係る第3の実施の形態の動作波形図を図4に示す。
【0028】
図2に示した第1の実施の形態と異なる点は、ランプの光出力を100%点灯と設定したことであり、その他の第1の実施の形態と同一構成には同一符号を付すことにより説明を省略する。
【0029】
(実施の形態4)
本発明に係る第4の実施の形態の動作波形図を図5に示す。
【0030】
図2に示した第1の実施の形態と異なる点は、ランプの光出力を連続調光ではなく、段調光と設定したことであり、その他の第1の実施の形態と同一構成には同一符号を付すことにより説明を省略する。
【0031】
なお、上記全ての実施の形態において、制御信号は、例えば0〜10VのDC電圧でも、他の構成でも構わない。また、制御信号は緩やかに変化する間は、単調に変化するだけでなく他の変化でも構わない。
【0032】
請求項1、請求項3に記載の発明によれば、複数の安定器を単一の制御装置で一括制御する照明装置において、安定器への電源供給を遮断することなく、安定器の制御信号レベルのぱらつきに関係なく、一斉にランプの消灯/点灯の切り替えを行なうことが可能な照明装置を提供できる。
【0033】
請求項2記載の発明によれば、請求項1記載の効果に加えて、放電灯が消灯から即時始動することが可能な照明装置を提供できる。
【図面の簡単な説明】
【図1】本発明に係るブロック構成図を示す。
【図2】本発明に係る第1の実施の形態の、(a)制御信号と光出力との関係を示す特性図、(b)入力信号と制御信号との関係を示す特性図である。
【図3】本発明に係る第2の実施の形態の、(a)制御信号と光出力との関係を示す特性図、(b)入力信号と制御信号との関係を示す特性図である。
【図4】本発明に係る第3の実施の形態の、(a)制御信号と光出力との関係を示す特性図、(b)入力信号と制御信号との関係を示す特性図である。
【図5】本発明に係る第4の実施の形態の、(a)制御信号と光出力との関係を示す特性図、(b)入力信号と制御信号との関係を示す特性図である。
【図6】本発明に係る制御信号の波形図を示す。
【図7】本発明に係る第1従来例の入力信号と制御信号との関係を示す特性図である。
【図8】本発明に係る第1従来例の制御信号と光出力との関係の特性図を示す。
【図9】本発明に係る第1従来例の、(a)制御信号と光出力との関係を示す特性図、(b)入力信号と制御信号との関係を示す特性図である。
【符号の説明】
S ばらつき[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lighting device, and more particularly to a lighting device that collectively controls a plurality of ballasts with a single control device.
[0002]
[Prior art]
FIG. 1 shows a block diagram of a first conventional example according to the present invention, and FIG. 9 shows an operation waveform diagram thereof.
[0003]
In this block, a plurality of
[0004]
Here, for example, when the on-duty of the control signal changes from 0% to 100% in accordance with the scale of the input signal (fader volume) to the control device, the rectangular wave-like control signal as shown in FIG. It is assumed that on-Duty is changed from 0% to 100%, that is, each ballast can perform dimming control of the light output of the lamp from 0% (lights off) to 100% (all lights up).
[0005]
Since it is difficult to keep the lamp in a lit state with a low luminous flux below a certain level, the lamp is normally controlled to be turned off when the dimming level reaches several percent as shown in FIG. That is, the lamp is controlled so that the on-duty of the control signal is turned off when it is higher than Si, turned on when it is lower than Si, and when the on-duty is smaller than Si, the light output is decreased as the on-duty increases.
[0006]
However, when simultaneously controlling a plurality of ballasts using a control signal having a monotonous and gentle curve with respect to the input signal (fader volume) to the control device as shown in FIG. 7, as shown in FIG. If the control signal level for switching off / lighting varies from S1, S2,..., Sn for each ballast, the fader volume scale is V1, V2,. Each ballast performs a switching operation of turning off / on. That is, when a plurality of ballasts are controlled by a single control signal, variation in the control signal level Si between the ballasts causes variation in the switching timing of turning off / on each lamp. The first problem occurs.
[0007]
As means for solving the first problem, control signal levels S1, S2,... There is a second conventional example according to the present invention in which the light-off operation is performed by forcibly shutting off the power supply to the ballast at a signal level Sa that is equal to or lower than the smallest level Smin among Sn.
[0008]
[Problems to be solved by the invention]
However, usually, the lamp requires a preheating time for the lamp filament when the lamp is switched from the unlit state to the lit state, that is, at the start. In other words, in the second conventional example, a preheating time of about 1 second is required for lighting, and the second problem that the responsiveness deteriorates occurs.
[0009]
In order to turn on the lamp instantaneously, a preheating current may be applied to the filament even when the lamp is turned off. For this purpose, it is necessary to continue to supply power to the ballast, but in the first and second conventional examples, the fluctuation of the control signal level of the ballast causes fluctuation in the switching timing of the lamp off / on. The third problem that occurs is also caused.
[0010]
The present invention has been made in view of all the above-mentioned problems, and an object of the present invention is to supply power to a ballast in an illumination device that collectively controls a plurality of ballasts with a single control device. It is an object of the present invention to provide an illuminating device capable of switching lamps on and off at the same time without being interrupted and irrespective of fluctuations in the control signal level of the ballast.
[0011]
[Means for Solving the Problems]
In order to solve the above problem, according to the first aspect of the present invention, when the input signal changes from a large level to a small level, the on-duty of the rectangular wave changes from 0% to 100%. a control unit for outputting the control signals, 100 and a plurality of ballasts to be connected in parallel to the control device via a signal line, the connection to the on-Duty at the output end of each
[0012]
According to a second aspect of the present invention, when the discharge lamp is extinguished, a preheating current sufficient to start the discharge lamp immediately is supplied to the filament of the discharge lamp .
[0013]
According to a third aspect of the present invention, the input signal is a DC voltage .
[0020]
Embodiment
(Embodiment 1)
The block configuration diagram of the first embodiment according to the present invention is the same as that of FIG. 1, and only the operation thereof is different. Therefore, the operation waveform diagram of the first embodiment is shown in FIG. The same reference numerals are assigned to the same components, and the description is omitted.
[0021]
Here, among the levels S1, S2,... Sn of the control signal, the minimum on-duty is Smin, and the maximum is Smax. Then, Sa and Sb satisfying Sa ≦ Smin and Sb ≧ Smax are arbitrarily determined.
[0022]
2A shows the relationship between the control signal (on-Duty) and the optical output, and FIG. 2B shows the relationship between the control signal (on-Duty) and the control device input (scale of the fader volume). Is shown. When on-Duty is less than or equal to Sa, the control signal changes slowly and monotonously with respect to changes in the control device input, and in Sa, the control signal changes sharply up to Sb with respect to slight changes in the input signal. Set. For comparison with the prior art, the relationship of the control signal with respect to the conventional control device input is indicated by a broken line in FIG. 2B, and the relationship of the control signal with respect to the control device input according to the present embodiment is illustrated in FIG. Indicated by the solid line. Note that the curve of the relationship of the control signal with respect to the control device input whose on-Duty is Sa or less is not limited to that in FIG. 7, and may be an arbitrary curve.
[0023]
Next, the operation will be briefly described with reference to FIG.
When the controller input is slowly moved from the MAX level to the MIN level and the output of the discharge lamp is controlled from 100% to 0%, on-Duty = 0% at the MAX level, and the light output of the lamp becomes maximum (100%). . In the conventional case as shown by the broken line in FIG. 2 (b), because of the variations S1, S2,..., Sn of the control signal level for each ballast, the volume levels V1,. In the case of the present embodiment shown by the solid line in FIG. 2B, since the setting is made as described above, the volume level is steep from Sa to Sb at the point where the volume level is M (MAX>M> MIN). The ballasts are turned off all at once at the volume level M, and the lamps are turned off all at once, regardless of the variations S1, S2,.
[0024]
(Embodiment 2)
The operation waveform diagram of the second embodiment according to the present invention is shown in FIG.
[0025]
The difference from the first embodiment shown in FIG. 2 is that the light output of the lamp when on-Duty = Smax is reached and the on-Duty is changed from Sa until the on-Duty changes from 0% to Sa. The dimming curve is set so that the light output of the lamp becomes substantially constant while changing to Sb, and the same components as those of the first embodiment are denoted by the same reference numerals and the description thereof is omitted. To do.
[0026]
With this configuration, all ballasts can be turned off at the same time and the lamps can be turned off at the same time at the lowest output of the ballast with the largest variation in control signal level Si. A range can be obtained. In the present embodiment, on-Duty = Sb may be fixed when the volume level is in the range from M to MIN.
[0027]
(Embodiment 3)
An operation waveform diagram of the third embodiment according to the present invention is shown in FIG.
[0028]
The difference from the first embodiment shown in FIG. 2 is that the light output of the lamp is set to 100% lighting, and the same components as those of the first embodiment are denoted by the same reference numerals. Description is omitted.
[0029]
(Embodiment 4)
FIG. 5 shows an operation waveform diagram of the fourth embodiment according to the present invention.
[0030]
The difference from the first embodiment shown in FIG. 2 is that the light output of the lamp is set to step dimming instead of continuous dimming, and the same configuration as that of the other first embodiment is used. The description is omitted by giving the same reference numerals.
[0031]
In all the above embodiments, the control signal may be, for example, a DC voltage of 0 to 10 V or another configuration. Further, as long as the control signal changes slowly, it may change not only monotonously but also other changes.
[0032]
According to the first and third aspects of the present invention, in the lighting device that collectively controls a plurality of ballasts with a single control device, the control signal of the ballast can be obtained without shutting off the power supply to the ballast. It is possible to provide an illuminating device capable of switching the lamps on and off at the same time regardless of the level fluctuation.
[0033]
According to invention of Claim 2, in addition to the effect of
[Brief description of the drawings]
FIG. 1 shows a block diagram according to the present invention.
2A is a characteristic diagram showing a relationship between a control signal and an optical output, and FIG. 2B is a characteristic diagram showing a relationship between an input signal and a control signal, according to the first embodiment of the present invention.
3A is a characteristic diagram showing a relationship between a control signal and an optical output, and FIG. 3B is a characteristic diagram showing a relationship between an input signal and a control signal, according to the second embodiment of the present invention.
4A is a characteristic diagram showing a relationship between a control signal and an optical output, and FIG. 4B is a characteristic diagram showing a relationship between an input signal and a control signal, according to a third embodiment of the present invention.
5A is a characteristic diagram showing a relationship between a control signal and an optical output, and FIG. 5B is a characteristic diagram showing a relationship between an input signal and a control signal, according to a fourth embodiment of the present invention.
FIG. 6 shows a waveform diagram of a control signal according to the present invention.
FIG. 7 is a characteristic diagram showing a relationship between an input signal and a control signal in the first conventional example according to the present invention.
FIG. 8 is a characteristic diagram showing the relationship between the control signal and the optical output of the first conventional example according to the present invention.
9A is a characteristic diagram showing a relationship between a control signal and an optical output, and FIG. 9B is a characteristic diagram showing a relationship between an input signal and a control signal in the first conventional example according to the present invention.
[Explanation of symbols]
S variation
Claims (3)
Priority Applications (1)
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JP29428297A JP3845983B2 (en) | 1997-10-27 | 1997-10-27 | Lighting device |
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JP29428297A JP3845983B2 (en) | 1997-10-27 | 1997-10-27 | Lighting device |
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JPH11135267A JPH11135267A (en) | 1999-05-21 |
JP3845983B2 true JP3845983B2 (en) | 2006-11-15 |
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JP29428297A Expired - Fee Related JP3845983B2 (en) | 1997-10-27 | 1997-10-27 | Lighting device |
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JP2003068495A (en) * | 2001-08-27 | 2003-03-07 | Matsushita Electric Works Ltd | Illumination control device |
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1997
- 1997-10-27 JP JP29428297A patent/JP3845983B2/en not_active Expired - Fee Related
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Publication number | Publication date |
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JPH11135267A (en) | 1999-05-21 |
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