JPH07130486A - Discharge lamp lighting device - Google Patents

Discharge lamp lighting device

Info

Publication number
JPH07130486A
JPH07130486A JP27368693A JP27368693A JPH07130486A JP H07130486 A JPH07130486 A JP H07130486A JP 27368693 A JP27368693 A JP 27368693A JP 27368693 A JP27368693 A JP 27368693A JP H07130486 A JPH07130486 A JP H07130486A
Authority
JP
Japan
Prior art keywords
discharge lamp
dimming
lamp
lighting device
frequency
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
Application number
JP27368693A
Other languages
Japanese (ja)
Inventor
Atsushi Kamioka
淳 上岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP27368693A priority Critical patent/JPH07130486A/en
Publication of JPH07130486A publication Critical patent/JPH07130486A/en
Pending legal-status Critical Current

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  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To provide a discharge lamp lighting device which can prevent generation of momentary flash and noises and can make sure starting. CONSTITUTION:A discharge lamp lighting circuit 1 is provided which gives an output voltage capable of starting a discharge lamp H and whose circuit configuration is such that the photo-output of the lamp H at the initial time of lighting up becomes the lowest dim level approximately. The photo-output of the lamp H is thus dimmed to the desired dim level by a dimming means 2 of a switch furnished in this lighting circuit 1.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、調光可能な放電灯点
灯装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dimmable discharge lamp lighting device.

【0002】[0002]

【従来の技術】従来例、たとえば特開昭61-296700 号を
図4に示す。すなわち、この放電灯点灯装置は、周波数
可変型の高周波電源Eと、この高周波電源Eに接続され
第1のコンデンサC1 ,インダクタンスLおよび第2の
コンデンサC2 からなる直列回路と、第2のコンデンサ
2 に並列に接続された放電灯Hとを備えている。Ia
はランプ電流、Vc2 はランプ電圧である。またこの放
電灯点灯装置の動作周波数に対する第2のコンデンサC
2 の両端電圧のグラフを図5に示す。ここで、実線は共
振カーブ、破線は点灯時の周波数特性である。f0 はイ
ンダクタンスLと第2のコンデンサC2 の共振周波数で
ある。
2. Description of the Related Art A conventional example, for example, Japanese Patent Laid-Open No. 61-296700 is shown in FIG. That is, the discharge lamp lighting device includes a variable frequency high frequency power source E, a series circuit connected to the high frequency power source E, which includes a first capacitor C 1 , an inductance L and a second capacitor C 2 , and a second circuit. And a discharge lamp H connected in parallel with the capacitor C 2 . Ia
Is the lamp current, and Vc 2 is the lamp voltage. The second capacitor C for the operating frequency of this discharge lamp lighting device
A graph of the voltage across both ends of No. 2 is shown in FIG. Here, the solid line is the resonance curve, and the broken line is the frequency characteristic during lighting. f 0 is the resonance frequency of the inductance L and the second capacitor C 2 .

【0003】高周波電源Eの動作周波数f1 は共振周波
数f0 の近傍に設定している。放電灯Hの両端に高い2
次電圧が印加され放電灯Hが始動すると、インダクタン
スLと第2のコンデンサC2 の共振系が崩れ、点線で示
した周波数特性となる。そして動作周波数f1 では放電
灯Hが明るく点灯するので、減光調光を行なうときは周
波数f2 の方へ周波数を高くし、増光調光するときは周
波数f4 の方へ周波数を低くする。なお、動作周波数f
1 は必ずしも共振周波数f0 より低い必要はない。
The operating frequency f 1 of the high frequency power source E is set near the resonance frequency f 0 . 2 high on both ends of the discharge lamp H
When the next voltage is applied and the discharge lamp H is started, the resonance system of the inductance L and the second capacitor C 2 collapses, and the frequency characteristic shown by the dotted line is obtained. Since the discharge lamp H lights up brightly at the operating frequency f 1 , the frequency is increased toward the frequency f 2 when dimming dimming is performed, and the frequency is decreased toward the frequency f 4 when dimming dimming is performed. . The operating frequency f
1 does not necessarily have to be lower than the resonance frequency f 0 .

【0004】[0004]

【発明が解決しようとする課題】しかし、この放電灯点
灯装置は、放電灯Hを調光状態で始動する場合、以下に
示す問題があった。すなわち、動作周波数f1 の区間を
短くして調光の周波数f2 に移行するとき、放電灯Hの
状態によっては始動に失敗する可能性がある。
However, this discharge lamp lighting device has the following problems when the discharge lamp H is started in the dimming state. That is, when the section of the operating frequency f 1 is shortened to shift to the dimming frequency f 2 , the starting may fail depending on the state of the discharge lamp H.

【0005】一方、動作周波数f1 の区間を長くして周
波数f2 に移行すると、確実に始動するが、その間放電
灯Hが明るく一瞬閃光が目につくという問題があった。
また動作周波数f1 の区間と周波数f2 の区間を交互に
繰り返すようにすることも考えられるが、制御回路が複
雑になり、点灯中もパルス的にランプ電流が流れるの
で、騒音等の面で不利になる。
On the other hand, when the section of the operating frequency f 1 is lengthened to shift to the frequency f 2 , the operation is surely started, but there is a problem that the discharge lamp H is bright and a flash of light is noticeable for a moment during that period.
It is also conceivable to alternately repeat the section of the operating frequency f 1 and the section of the frequency f 2 , but since the control circuit becomes complicated and the lamp current flows in a pulsed manner during lighting, in terms of noise, etc. Be at a disadvantage.

【0006】したがって、この発明の目的は、一瞬閃光
および騒音等を防止することができ、しかも確実に始動
することができる放電灯点灯装置を提供することであ
る。
SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a discharge lamp lighting device which can prevent momentary flashes and noises and can be reliably started.

【0007】[0007]

【課題を解決するための手段】この発明の放電灯点灯装
置は、放電灯を始動可能な出力電圧を有しかつ始動点灯
時の前記放電灯の光出力が略最低調光レベルとなるよう
に回路構成した放電灯点灯回路と、この放電灯点灯回路
に設けられて前記放電灯の前記光出力を所望の調光レベ
ルに調光する調光手段とを備えたものである。
DISCLOSURE OF THE INVENTION The discharge lamp lighting device of the present invention has an output voltage capable of starting the discharge lamp, and the light output of the discharge lamp at the time of starting lighting is substantially at the minimum dimming level. A discharge lamp lighting circuit having a circuit configuration, and a dimming unit provided in the discharge lamp lighting circuit for dimming the light output of the discharge lamp to a desired dimming level are provided.

【0008】[0008]

【作用】この発明の構成によれば、放電灯が始動しても
光出力は略最低調光レベルのため一瞬閃光が目立たな
い。そのため、放電灯を始動できる出力電圧を十分な時
間供給できるので始動を確実にすることができる。また
従来例のように複雑な制御回路を必要としないので回路
構成が簡単になり、またパルス的にランプ電流が流れな
いので騒音、安全性および素子の信頼性等の面で有利で
ある。
According to the structure of the present invention, even if the discharge lamp is started, the light output is substantially at the lowest dimming level, so that the flash light is not noticeable for a moment. Therefore, since the output voltage that can start the discharge lamp can be supplied for a sufficient time, the start can be ensured. Further, unlike the conventional example, since a complicated control circuit is not required, the circuit structure is simplified, and since the lamp current does not flow in a pulsed manner, it is advantageous in terms of noise, safety, element reliability, and the like.

【0009】[0009]

【実施例】この発明の第1の実施例を図1および図2に
より説明する。すなわち、この放電灯点灯装置は、放電
灯点灯回路1と、調光手段2とを有する。放電灯点灯装
置1は、放電灯Hを始動可能な出力電圧を有し、かつ始
動点灯時の放電灯Hの光出力が略最低調光レベルとなる
ように回路構成している。実施例では、直流電源Vと、
交互にオンオフを繰り返すスイッチS1 ,S2 と、スイ
ッチS2 に接続され第1のコンデンサC1 ,インダクタ
ンスLおよび第2のコンデンサC2 からなる直列回路
と、第2のコンデンサC2 に接続された抵抗Rおよび放
電灯Hの直列回路とを有する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, this discharge lamp lighting device has the discharge lamp lighting circuit 1 and the light control means 2. The discharge lamp lighting device 1 has a circuit configuration such that the discharge lamp H has an output voltage capable of starting the discharge lamp H, and the light output of the discharge lamp H at the time of starting lighting is substantially the minimum dimming level. In the embodiment, a DC power source V,
A switch S 1, S 2 to repeat on-off alternately, the first capacitor C 1 is connected to the switch S 2, a series circuit consisting of an inductance L and a second capacitor C 2, is connected to the second capacitor C 2 And a resistor R and a series circuit of a discharge lamp H.

【0010】放電灯Hの不点灯状態において、スイッチ
1 ,S2 を交互に動作周波数f1でオンオフを繰り返
すとき、インダクタンスLと第2のコンデンサC2 の共
振により第2のコンデンサC2 の両端に高い電圧が発生
し、この電圧が放電灯Hの両端に印加され、放電灯Hが
始動する。すなわち、スイッチS1 がオンになると、直
流電源V(+)→スイッチS1 →第1のコンデンサC1
→インダクタンスL→第2のコンデンサC2 →直流電源
V(−)の経路で電流が流れる。つぎにスイッチS2
オンになると、第1のコンデンサC1 →スイッチS2
第2のコンデンサC2 →インダクタンスL→第1のコン
デンサC1 の経路で電流が流れる。なおスイッチS1
2 は同時にオンにならない。このため、インダクタン
スLおよび第2のコンデンサC2 の共振により、第2の
コンテッサC2 の両端に高電圧を発生し、抵抗Rを介し
て放電灯Hに高電圧が印加され、放電灯Hが始動する。
[0010] In non-lighting state of the discharge lamp H, when repeated on-off switch S 1, the operation of S 2 are alternately frequency f 1, an inductance L and a second resonance capacitor C 2 of the second capacitor C 2 A high voltage is generated at both ends, this voltage is applied to both ends of the discharge lamp H, and the discharge lamp H is started. That is, when the switch S 1 is turned on, the DC power source V (+) → the switch S 1 → the first capacitor C 1
→ Inductance L → Second capacitor C 2 → Current flows through the path of DC power supply V (−). Next, when the switch S 2 is turned on, the first capacitor C 1 → switch S 2
A current flows through the path of the second capacitor C 2 → the inductance L → the first capacitor C 1 . The switch S 1 ,
S 2 does not turn on at the same time. Therefore, due to the resonance of the inductance L and the second capacitor C 2 , a high voltage is generated across the second container C 2 , and the high voltage is applied to the discharge lamp H via the resistor R, and the discharge lamp H To start.

【0011】点灯後は抵抗Rによりランプ電流は限流さ
れ、放電灯Hは調光状態で点灯する。すなわち、スイッ
チS1 のオンにより、直流電源V(+)→スイッチS1
→第1のコンデンサC1 →インダクタンスL→抵抗R→
放電灯H→直流電源V(−)の経路で電流が流れ、また
スイッチS2 のオンにより、第1のコンデンサC1 →ス
イッチS2 →放電灯H→抵抗R→インダクタンスL→第
1のコンデンサC1 の経路で電流が流れ、ランプ電流は
抵抗Rにより限流されるため小さい。
After lighting, the lamp current is limited by the resistor R, and the discharge lamp H lights in a dimmed state. That is, when the switch S 1 is turned on, the DC power source V (+) → the switch S 1
→ first capacitor C 1 → inductance L → resistance R →
A current flows in the path of the discharge lamp H → DC power supply V (−), and when the switch S 2 is turned on, the first capacitor C 1 → switch S 2 → discharge lamp H → resistor R → inductance L → first capacitor A current flows through the path of C 1 , and the lamp current is limited because it is limited by the resistor R.

【0012】調光手段2は、放電灯点灯回路1に設けら
れて放電灯Hの光出力を所望の調光レベルに調光する。
実施例ではランプ電流を変化させて調光する手段とし
て、スイッチS1 ,S2 の動作周波数を変化させること
としている。図2はこの放電灯点灯装置のタイムチャー
トを示す。すなわち、(a)は動作周波数fを示し、
(b)はランプ電圧Vc2 を示し、(c)はランプ電流
Iaを示し、(d)は光出力を示している。時点0から
1 は先行予熱期間であり、始動時の動作周波数f1
りも高い周波数f2 でスイッチS1 ,S2 がオンオフ繰
り返し動作し、このときの電流で放電灯Hを予熱してい
る。時点t1 からt2 は始動電圧発生区間であり、共振
周波数に近い始動可能な動作周波数f1 が印加され、こ
のときランプ電圧は(b)のように放電灯Hが始動可能
な高さを有する。時点ts は時点t1 〜t2 の区間内で
放電灯Hが始動した時であり、ランプ電圧Vc2
(b)のように低くなり、ランプ電流Iaは(c)よう
に小さく、したがって放電灯Hの光出力は(d)のよう
に略最低調光レベルL1 となる。時点t 2 以降は所望す
る調光レベルの区間であり、増光調光の場合たとえば
(a)のように周波数f4 (<f1 )でスイッチS1
2 のオンオフが繰り返され、ランプ電圧Vc2
(b)のように小さく、ランプ電流Iaは(c)のよう
に増加し、光出力は(d)のように調光レベルL2 に増
加する。一方減光調光の場合にはたとえば周波数f
2 (>f1 )でスイッチS1 ,S2 を制御すると、ラン
プ電圧は高くランプ電流は小さくなり、光出力は減光と
なる。
The dimming means 2 is provided in the discharge lamp lighting circuit 1.
Then, the light output of the discharge lamp H is dimmed to a desired dimming level.
In the embodiment, as a means for changing the lamp current to adjust light
Switch S1, S2Changing the operating frequency of
I am trying. Figure 2 shows the timechart of this discharge lamp lighting device.
Indicates the That is, (a) shows the operating frequency f,
(B) is the lamp voltage Vc2, (C) is the lamp current
Ia is shown, and (d) shows the optical output. From time 0
t1Is the preceding preheating period, and the operating frequency f at the time of starting1Yo
Higher frequency f2Switch S1, S2Is turned on and off
The discharge lamp H is preheated with the current at this time.
It Time t1To t2Is the starting voltage generation section and resonance
Operating frequency f that can be started close to the frequency1Is applied
At this time, the lamp voltage can start the discharge lamp H as shown in (b).
It has a great height. Time tsIs at time t1~ T2Within the section
When the discharge lamp H is started, the lamp voltage Vc2Is
As shown in (b), the lamp current Ia becomes lower (c).
Therefore, the light output of the discharge lamp H is as shown in (d).
At the lowest dimming level L1Becomes Time t 2After that you can
This is the section of the dimming level that is
Frequency f as in (a)Four(<F1) Switch S1
S2Is repeatedly turned on and off, and the lamp voltage Vc2Is
As small as (b), the lamp current Ia is as shown in (c)
And the light output is increased to the dimming level L as shown in (d).2Increased
Add On the other hand, in the case of dimming dimming, for example, the frequency f
2(> F1) Switch S1, S2Control the run
Voltage is high, lamp current is low, and light output is dimmed.
Become.

【0013】この実施例によれば、放電灯Hが始動して
も光出力は略最低調光レベルのため一瞬閃光が目立たな
い。そのため、放電灯Hを始動できる出力電圧を十分な
時間供給できるので始動を確実にすることができる。ま
た従来例のように複雑な制御回路を必要としないので回
路構成が簡単になり、またパルス的にランプ電流が流れ
ないので騒音、安全性および素子の信頼性等の面で有利
である。
According to this embodiment, even when the discharge lamp H is started, the light output is substantially the lowest dimming level, so that the flash light is not noticeable for a moment. Therefore, since the output voltage that can start the discharge lamp H can be supplied for a sufficient time, the start can be ensured. Further, unlike the conventional example, since a complicated control circuit is not required, the circuit structure is simplified, and since the lamp current does not flow in a pulsed manner, it is advantageous in terms of noise, safety, element reliability, and the like.

【0014】この結果、この放電灯点灯装置は、深い調
光レベルまで調光できるとともに、所望する調光レベル
で視感的に始動することができる。なお、その他の調光
手段として、直流電源Vの電圧を変化させたり、スイッ
チS1 ,S2 のそれぞれのオン時間を変化させたり、ス
イッチS1 ,S2 のオン時間の一方を短くし他方を長く
したり、インダクタンスLまたは第2のコンデンサC2
の値を変化させたり、抵抗Rの値を変化させるなどの手
段がある。
As a result, the discharge lamp lighting device can perform dimming to a deep dimming level and can be visually started at a desired dimming level. As other dimming means, the voltage of the DC power supply V is changed, the on times of the switches S 1 and S 2 are changed, and one of the on times of the switches S 1 and S 2 is shortened and the other is changed. Longer, the inductance L or the second capacitor C 2
There are means for changing the value of R, changing the value of the resistance R, and the like.

【0015】また、直流電源Vは商用電源を整流後平滑
したものでも、またチョッパー回路を使ったものでもよ
い。また抵抗Rは損失の面で不利であるので、他のイン
ピーダンス素子でもよい。ただし、大きなインピーダン
スが必要なため、インダクタンス素子がもっとも好まし
い。また放電灯Hの種類や周囲温度などの状態、および
所望する調光レベルに応じて始動電圧発生区間t1 〜t
2 を変化させてもよいし、動作周波数f1 の値を変化さ
せてもよい。
The DC power source V may be a commercial power source that has been rectified and smoothed, or a chopper circuit may be used. Further, since the resistance R is disadvantageous in terms of loss, another impedance element may be used. However, an inductance element is most preferable because a large impedance is required. Further, depending on the type of the discharge lamp H, the conditions such as the ambient temperature, and the desired dimming level, the starting voltage generating sections t 1 to t are generated.
2 may be changed, or the value of the operating frequency f 1 may be changed.

【0016】この発明の第2の実施例を図3に示す。す
なわち、この放電灯点灯装置は、高周波電源V1 、限流
素子Mおよび昇圧トランスTからなり、昇圧トランスT
の2次側に放電灯Hを接続している。高周波電源V1
して、1石式,直列式,並列式,フルブリッジ式等のイ
ンバータなどがある。一般に点灯中にランプ電流が小さ
くなるような動作を行なう放電灯点灯装置では、不点灯
時に十分な電圧が放電灯Hに印加されず始動できないこ
とがある。しかし、この実施例では昇圧トランスTを用
いているため、十分な電圧を放電灯Hに印加することが
できるので、放電灯Hの始動が確実であり、しかもラン
プ電流を小さくして光出力の調光レベルを略最低調光レ
ベルにすることができる。また調光手段はランプ電流を
制御することにより行なう。
A second embodiment of the present invention is shown in FIG. That is, this discharge lamp lighting device comprises a high frequency power source V 1 , a current limiting element M and a step-up transformer T, and a step-up transformer T
A discharge lamp H is connected to the secondary side of the. As the high frequency power source V 1, there are one-stone type, series type, parallel type, full bridge type inverters and the like. Generally, in a discharge lamp lighting device that performs an operation such that the lamp current becomes small during lighting, a sufficient voltage may not be applied to the discharge lamp H at the time of non-lighting, and it may not be possible to start. However, since the step-up transformer T is used in this embodiment, a sufficient voltage can be applied to the discharge lamp H, so that the discharge lamp H can be started reliably and the lamp current can be reduced to reduce the light output. The dimming level can be set to a substantially minimum dimming level. Further, the dimming means is performed by controlling the lamp current.

【0017】その他の実施例として、図4に示す回路を
用いることもできる。この場合、インダクタンスLを大
きくし、第2のコンデンサC2 を小さくすることによ
り、十分な始動電圧が得られるとともに、始動後の光出
力は小さなものにすることができる。また調光手段は、
高周波電源Eの出力電圧を上昇したり、インダクスンス
Lの値を減少するなどにより増光調光でき、減光調光も
可能である。
As another embodiment, the circuit shown in FIG. 4 can be used. In this case, by increasing the inductance L and decreasing the second capacitor C 2 , a sufficient starting voltage can be obtained and the light output after starting can be made small. The light control means
The dimming dimming can be performed by increasing the output voltage of the high frequency power source E or decreasing the value of the inductance L.

【0018】なお、調光手段は前記実施例に限定されな
い。
The light control means is not limited to the above embodiment.

【0019】[0019]

【発明の効果】この発明の放電灯点灯装置は、放電灯が
始動しても光出力は略最低調光レベルのため一瞬閃光が
目立たない。そのため、放電灯を始動できる出力電圧を
十分な時間供給できるので始動を確実にすることができ
る。また従来例のように複雑な制御回路を必要としない
ので回路構成が簡単になり、またパルス的にランプ電流
が流れないので騒音、安全性および素子の信頼性等の面
で有利であるという効果がある。
According to the discharge lamp lighting device of the present invention, even if the discharge lamp is started, the light output is substantially at the lowest dimming level, so that the flash light is inconspicuous for a moment. Therefore, since the output voltage that can start the discharge lamp can be supplied for a sufficient time, the start can be ensured. Further, unlike the conventional example, since a complicated control circuit is not required, the circuit configuration is simplified, and since the lamp current does not flow in a pulsed manner, it is advantageous in terms of noise, safety, element reliability, etc. There is.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の第1の実施例の放電灯点灯回路図で
ある。
FIG. 1 is a circuit diagram of a discharge lamp lighting circuit according to a first embodiment of the present invention.

【図2】その放電灯のタイムチャートである。FIG. 2 is a time chart of the discharge lamp.

【図3】第2の実施例の放電灯点灯回路図である。FIG. 3 is a discharge lamp lighting circuit diagram of a second embodiment.

【図4】従来例の放電灯点灯回路図である。FIG. 4 is a discharge lamp lighting circuit diagram of a conventional example.

【図5】その周波数特性図である。FIG. 5 is a frequency characteristic diagram thereof.

【符号の説明】[Explanation of symbols]

1 放電灯点灯回路 2 調光手段 H 放電灯 1 discharge lamp lighting circuit 2 dimming means H discharge lamp

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 放電灯を始動可能な出力電圧を有しかつ
始動点灯時の前記放電灯の光出力が略最低調光レベルと
なるように回路構成した放電灯点灯回路と、この放電灯
点灯回路に設けられて前記放電灯の前記光出力を所望の
調光レベルに調光する調光手段とを備えた放電灯点灯装
置。
1. A discharge lamp lighting circuit configured to have an output voltage capable of starting a discharge lamp and having a circuit configuration such that the light output of the discharge lamp at the time of starting lighting is substantially at a minimum dimming level, and the discharge lamp lighting. A discharge lamp lighting device, comprising: a dimming unit provided in a circuit for dimming the light output of the discharge lamp to a desired dimming level.
JP27368693A 1993-11-01 1993-11-01 Discharge lamp lighting device Pending JPH07130486A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27368693A JPH07130486A (en) 1993-11-01 1993-11-01 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27368693A JPH07130486A (en) 1993-11-01 1993-11-01 Discharge lamp lighting device

Publications (1)

Publication Number Publication Date
JPH07130486A true JPH07130486A (en) 1995-05-19

Family

ID=17531142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27368693A Pending JPH07130486A (en) 1993-11-01 1993-11-01 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JPH07130486A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047323A1 (en) * 1997-04-17 1998-10-22 Toshiba Lighting & Technology Corporation Discharge lamp lighting device and illumination device
WO2007000958A1 (en) * 2005-06-27 2007-01-04 Matsushita Electric Works, Ltd. Rouser

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047323A1 (en) * 1997-04-17 1998-10-22 Toshiba Lighting & Technology Corporation Discharge lamp lighting device and illumination device
US6177768B1 (en) * 1997-04-17 2001-01-23 Toshiba Lighting & Technology Corp. Discharge lamp lighting device and illumination device
WO2007000958A1 (en) * 2005-06-27 2007-01-04 Matsushita Electric Works, Ltd. Rouser
JP2007003499A (en) * 2005-06-27 2007-01-11 Matsushita Electric Works Ltd Awakening device

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