JPH06132088A - Electric discharge lamp lighting device - Google Patents

Electric discharge lamp lighting device

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Publication number
JPH06132088A
JPH06132088A JP27644492A JP27644492A JPH06132088A JP H06132088 A JPH06132088 A JP H06132088A JP 27644492 A JP27644492 A JP 27644492A JP 27644492 A JP27644492 A JP 27644492A JP H06132088 A JPH06132088 A JP H06132088A
Authority
JP
Japan
Prior art keywords
discharge lamp
lamp
electric discharge
spot
high 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.)
Withdrawn
Application number
JP27644492A
Other languages
Japanese (ja)
Inventor
Hiroshi Kido
大志 城戸
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 JP27644492A priority Critical patent/JPH06132088A/en
Publication of JPH06132088A publication Critical patent/JPH06132088A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To provide an electric discharge lamp lighting device whereby moving a spot, generated on a filament of an electric discharge lamp, is prevented from being felt as a flicker by an eye of a person. CONSTITUTION:In an electric discharge lamp La, filaments f1, f2 are preheated by DC power sources DC1, DC2. In the electric discharge lamp La, DC voltage, obtained by rectifying high frequency voltage smoothed of an inverter circuit 2, is applied to both ends by alternately on-off turning switching elements Q3, Q4. The switching elements Q3, Q4 are driven by a drive circuit 3 with a low frequency, to flow a square wave lamp current of low frequency in the electric discharge lamp La. In a fixed period in the vicinity of polarity inversion in this low frequency, the switching element is driven by a high frequency, to flow a lamp current of high frequency in the electric discharge lamp La lighted. In a high frequency period, since a direction of the lamp current is inverted by a high period, a position of a spot, generated on the filaments f1, f2, is moved at a high speed between parts (a), (b), to prevent a flicker, due to the moving of the spot, from being felt by an eye of a person.

Description

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

【0001】[0001]

【産業上の利用分野】本発明は、フィラメントを有する
放電灯の放電灯点灯装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp lighting device for a discharge lamp having a filament.

【0002】[0002]

【従来の技術】従来、放電灯を直流点灯させると、放電
灯のフィラメントの一か所に輝点(スポット)が集中し
てその箇所が加熱され、ランプ寿命が短くなるという問
題がある。そのためランプ寿命を損なうことなく、放電
灯を直流点灯させるために、直流の極性を交互に反転さ
せて放電灯に矩形波のランプ電流を流して点灯させる放
電灯点灯装置が従来からある。この矩形波点灯において
放電灯のフィラメントに直流の予熱電流を与えた場合、
図6に示すように矩形波のランプ電流ILaと、直流の予
熱電流If との極性によりランプ電流ILaが正のとき
(図7のI)は矢印イの方向にランプ電流ILaが流れ、
負のとき(図7のII)はスポット(フィラメントの輝点
の位置)が移動して矢印ロの方向にランプ電流ILaが流
れ、放電灯Laのフィラメント上にスポットを二か所形
成する所謂ダブルスポット点灯となる。ダブルスポット
点灯は上記のように直流で予熱する場合以外に矩形波の
ランプ電流に対して位相差を持つ交流(高周波)で予熱
した場合も起こる。
2. Description of the Related Art Conventionally, when a discharge lamp is operated by direct current, there is a problem that a bright spot (spot) is concentrated on one portion of the filament of the discharge lamp and the portion is heated and the lamp life is shortened. Therefore, in order to turn on the discharge lamp by direct current without impairing the life of the lamp, there has been a discharge lamp lighting device which alternately inverts the polarity of direct current and sends a rectangular wave lamp current to the discharge lamp to turn on the lamp. When a DC preheating current is applied to the filament of the discharge lamp in this rectangular wave lighting,
As shown in FIG. 6, when the lamp current I La is positive (I in FIG. 7) due to the polarities of the rectangular wave lamp current I La and the DC preheating current If, the lamp current I La flows in the direction of arrow a. ,
When it is negative (II in FIG. 7), the spot (the position of the bright spot of the filament) moves and the lamp current I La flows in the direction of arrow B, forming two spots on the filament of the discharge lamp La. Double spot lighting. Double-spot lighting occurs not only when preheating with direct current as described above but also when preheating with alternating current (high frequency) having a phase difference with respect to a rectangular wave lamp current.

【0003】[0003]

【発明が解決しようとする課題】上記の従来例にあって
は、矩形波のランプ電流が高周波であれば問題がない
が、低周波(特に商用周波数の50/60Hz以下)に
おいては、図7に示すスポッ発生位置がイ、ロと交互に
移動する現象がちらつきとして人の目に感じられ不快に
なるという問題がある。
In the above-mentioned conventional example, there is no problem if the rectangular wave lamp current is a high frequency, but at a low frequency (particularly 50/60 Hz or less of the commercial frequency), FIG. There is a problem that the phenomenon that the spot occurrence position shown in (1) and (2) alternately move is felt by the human eye as flicker and becomes uncomfortable.

【0004】本発明は、上述の問題点に鑑みて為された
もので、その目的とするところは放電灯のフィラメント
上に発生するスポットの移動をちらつきとして人の目に
感じさせない放電灯点灯装置を提供するにある。
The present invention has been made in view of the above-mentioned problems, and an object thereof is a discharge lamp lighting device which does not cause the movement of the spot generated on the filament of the discharge lamp to flicker to be noticed by human eyes. To provide.

【0005】[0005]

【課題を解決するための手段】本発明は、上述の目的を
達成するために、フィラメントを有する放電灯に低周波
の矩形波のランプ電流を流す点灯手段と、ダブルスポッ
トを発生させる予熱手段とを備えた放電灯点灯装置にお
いて、前記低周波の矩形波のランプ電流の極性を反転さ
せる近傍の期間のみ高周波のランプ電流を放電灯に流す
ものである。
In order to achieve the above object, the present invention provides a lighting means for supplying a low-frequency rectangular wave lamp current to a discharge lamp having a filament, and a preheating means for generating a double spot. In the discharge lamp lighting device including the above, the high frequency lamp current is passed through the discharge lamp only in the vicinity of the period when the polarity of the low frequency rectangular wave lamp current is inverted.

【0006】[0006]

【作用】本発明の構成によれば、低周波の矩形波のラン
プ電流の極性を反転させる近傍の期間のみ高周波のラン
プ電流を放電灯に流すので、スポットの移動が人の目に
ちらつきと感じさせない速さとなる。しかも主なるラン
プ電流は低周波の矩形波であるから、正、負の直流点灯
期間が長くなって放電灯から発生する放射雑音も低減で
き、更に矩形波点灯であるので直流点灯のようなカタホ
リシス現象がなくなり、ランプ寿命が短くなることはな
い。
According to the structure of the present invention, the high-frequency lamp current is passed through the discharge lamp only in the vicinity of the period when the polarity of the low-frequency rectangular wave lamp current is reversed, so that the movement of the spot is perceived as flickering to the human eye. It will not let you do it. Moreover, since the main lamp current is a low-frequency rectangular wave, the positive and negative DC lighting periods become longer, and the radiation noise generated from the discharge lamp can be reduced. The phenomenon does not disappear and the lamp life is not shortened.

【0007】[0007]

【実施例】【Example】

以下本発明を実施例により説明する。 (実施例1)図1は本実施例の回路構成を示しており、
図において、直流電源(商用の交流電源を整流して得た
直流電源をも含む)1をインバータ回路2で数十KHz
以上の高周波に変換し、この変換した出力を出力トラン
スTの中間タップc付の2次巻線を介してフィラメント
付放電灯(蛍光灯)Laの点灯回路へ出力するようにな
っている。
The present invention will be described below with reference to examples. (Embodiment 1) FIG. 1 shows a circuit configuration of this embodiment.
In the figure, a DC power supply (including a DC power supply obtained by rectifying a commercial AC power supply) 1 is used for several tens KHz by an inverter circuit 2.
The above-mentioned high frequency is converted and the converted output is output to the lighting circuit of the filament-equipped discharge lamp (fluorescent lamp) La through the secondary winding with the intermediate tap c of the output transformer T.

【0008】インバータ回路2は、図2に示すようにス
イッチング素子Q1 、Q2 、共振用のコンデンサC0
チョークL0 、カップリング用コンデンサC1 、出力ト
ランスT、上記スイッチング素子Q1 、Q2 を駆動する
駆動回路(図示せず)、スイッチング素子Q1 、Q2
逆並列に接続したダイオードD1 、D2 からなり、出力
トランスTの2次巻線の中間タップcを放電灯Laの一
端に接続して基準出力とし、2次巻線の両端a,bには
インバータ回路2の高周波出力を整流するためのダイオ
ードD3 〜D6 からなるダイオードブリッジの入力端を
接続している。インバータ回路2の高周波出力はダイオ
ードD3 〜D6 で整流された後、ダイオードブリッジの
正、負の出力端に一端を夫々接続し、他端を上記出力ト
ランスTの中間タップcに接続したコンデンサC2 、C
3 で平滑され、中間タップcからみて夫々正、負の直流
出力となる。
As shown in FIG. 2, the inverter circuit 2 includes switching elements Q 1 and Q 2 , a resonance capacitor C 0 ,
Choke L 0, coupling capacitors C 1, the output transformer T, (not shown) driving circuit for driving the switching element Q 1, Q 2, diodes D 1 connected in reverse parallel to the switching element Q 1, Q 2 , D 2 , and the intermediate tap c of the secondary winding of the output transformer T is connected to one end of the discharge lamp La to serve as a reference output, and the high frequency output of the inverter circuit 2 is applied to both ends a and b of the secondary winding. The input end of a diode bridge composed of diodes D 3 to D 6 for rectification is connected. The high frequency output of the inverter circuit 2 is rectified by the diodes D 3 to D 6 , and then one end is connected to the positive and negative output ends of the diode bridge, and the other end is connected to the intermediate tap c of the output transformer T. C 2 , C
It is smoothed by 3 and becomes positive and negative DC output as viewed from the intermediate tap c.

【0009】点灯回路のスイッチング素子Q3 、Q4
直列に接続され、その接続点を放電灯Laの他端に接続
し、また直列回路を上記ダイオードブリッジの正、負の
出力端間に接続し、駆動回路3により交互にスイッチン
グされるようになっている。放電灯Laは両端のフィラ
メントf1 、f2 に予熱用の直流電源DC1 、DC 2
接続して、直流電源DC1 、DC2 で予熱されるように
なっている。
Switching element Q of the lighting circuit3, QFourIs
Connected in series, connecting the connection point to the other end of the discharge lamp La
In addition, connect the series circuit to the positive and negative of the diode bridge.
Connected between the output terminals and switched by the drive circuit 3 alternately.
It is supposed to be. The discharge lamp La has fillers at both ends.
Ment f1, F2DC power supply for preheating1, DC 2To
Connect, DC power supply DC1, DC2To be preheated with
Has become.

【0010】次に本実施例装置の動作を説明する。直流
電源1より直流電力が供給されたインバータ回路2は出
力トランスTの2次巻線に高周波電圧を発生する。この
高周波電圧は、ダイオードD3 〜D6 からなるダイオー
ドブリッジで整流された後、コンデンサC2 、C3 で平
滑され、出力トランスTの中間タップcからみて正、負
の直流電圧となる。
Next, the operation of the apparatus of this embodiment will be described. The inverter circuit 2 supplied with the DC power from the DC power supply 1 generates a high frequency voltage in the secondary winding of the output transformer T. The high frequency voltage is rectified by a diode bridge consisting of diodes D 3 to D 6, smoothed by the capacitor C 2, C 3, positive have viewed the center tap c of the output transformer T, a negative DC voltage.

【0011】ここでスイッチング素子Q3 がオンで、ス
イッチング素子Q4 がオフの時は、インバータ回路2の
高周波出力を整流平滑して得られた直流がコンデンサC
2 、スイッチング素子Q3 、放電灯La、コンデンサC
2 の回路で流れ、放電灯LaにI方向のランプ電流ILa
を流す。この時のスポット発生位置は、図1のイとな
る。
When the switching element Q 3 is on and the switching element Q 4 is off, the direct current obtained by rectifying and smoothing the high frequency output of the inverter circuit 2 is the capacitor C.
2 , switching element Q 3 , discharge lamp La, capacitor C
It flows in the circuit of 2 and the lamp current I La in the I direction is applied to the discharge lamp La.
Shed. The spot generation position at this time is a in FIG.

【0012】また逆にスイッチング素子Q3 がオフで、
スイッチング素子Q4 がオンの時は、インバータ回路2
の高周波出力を整流平滑して得られた直流がコンデンサ
3、放電灯La、スイッチング素子Q4 、コンデンサ
3 の回路で流れ、放電灯Laに上記I方向とは逆方向
にランプ電流ILaを流す。この時のスポット発生位置
は、図1のロとなる。
On the contrary, when the switching element Q 3 is off,
Inverter circuit 2 when switching element Q 4 is on
The direct current obtained by rectifying and smoothing the high frequency output of the above flows through the circuit of the capacitor C 3 , the discharge lamp La, the switching element Q 4 and the capacitor C 3 , and the lamp current I La flows through the discharge lamp La in the direction opposite to the above I direction. Shed. The spot generation position at this time is B in FIG.

【0013】さて駆動回路3は低周波(商用周波数の5
0/60KHz以下)の制御信号で、スイッチング素子
3 、Q4 を交互にオンオフするとともに、この低周波
の極性を反転させる近傍の一定期間数十KHzの高周波
の制御信号でスイッチング素子Q3 、Q4 を交互にオン
オフするように制御信号を出力しており、図4に示すよ
うにt1 、t3 期間が低周波の正、負の極性の期間で、
その間のt2 の期間が高周波の期間となっている。
Now, the drive circuit 3 has a low frequency (commercial frequency 5
(0/60 KHz or less), the switching elements Q 3 and Q 4 are alternately turned on / off, and the switching element Q 3 is controlled by a high frequency control signal of several tens KHz for a certain period in the vicinity of inverting the polarity of the low frequency. A control signal is output so as to alternately turn on and off Q 4 , and as shown in FIG. 4, t 1 and t 3 periods are low frequency positive and negative polarity periods,
The period of t 2 in the meantime is a high frequency period.

【0014】さて上記のt1 の期間ではスイッチング素
子Q3 がオンとなり、スイッチング素子Q4 がオフとな
るためコンデンサC2 、スイッチング素子Q3 、放電灯
La、コンデンサC2 の回路で電流が流れて、上述した
ように放電灯LaにはI方向のランプ電流ILaが流れ、
スポットの発生位置が図1のイに示すようになる。次の
高周波のt2 の期間では、高い周期でスイッチング素子
3 、Q4 の状態が交互に反転するため、放電灯Laに
流れるランプ電流ILaの方向は高い周期で反転し、スポ
ットの発生位置はイ、ロの間を高速に移動することにな
り、このため人の目にはスポットの移動によるちらつき
が感じない。
Since the switching element Q 3 is turned on and the switching element Q 4 is turned off during the period of t 1 , the current flows through the circuit of the capacitor C 2 , the switching element Q 3 , the discharge lamp La and the capacitor C 2. As described above, the lamp current I La in the I direction flows through the discharge lamp La,
The spot generation position is as shown in FIG. During the next high frequency t 2 period, the states of the switching elements Q 3 and Q 4 are alternately inverted at a high cycle, so the direction of the lamp current I La flowing through the discharge lamp La is inverted at a high cycle, and a spot is generated. The position moves at high speed between a and b, so human eyes do not feel the flicker due to the movement of the spot.

【0015】更にこの高周波の期間t2 が経過すると、
スイッチング素子Q3 がオフで、スイッチング素子Q4
がオンとなるためコンデンサC3 、放電灯La、スイッ
チング素子Q4 、コンデンサC4 の回路で電流が流れ
て、上述したように放電灯LaにはI方向とは逆方向の
ランプ電流ILaが流れ、スポットの発生位置が図1のロ
のようになる。
Further, when this high frequency period t 2 has elapsed,
Switching element Q 3 is off and switching element Q 4
Is turned on, a current flows in the circuit of the capacitor C 3 , the discharge lamp La, the switching element Q 4 , and the capacitor C 4 , and as described above, the lamp current I La in the direction opposite to the I direction is generated in the discharge lamp La. The flow and spot generation positions are as shown in FIG.

【0016】以後同様にしてスイッチング素子Q3 、Q
4 を低周波で交互にオンオフさせ、その極性の反転の近
傍の一定期間のみ高周波でスイッチング素子Q3 、Q4
を交互にオンオフさせることにより、放電灯Laにはイ
ンバータ回路2の出力トランスTの中間タップcから見
て正の直流電圧→高周波の矩形波電圧→インバータ回路
2の出力トランスTの中間タップcから見て負の直流電
圧→高周波の矩形波電圧→インバータ回路2の出力トラ
ンスTの中間タップcから見て正の直流電圧の順で繰り
返して印加されて、放電灯Laの点灯が行われる。
Thereafter, the switching elements Q 3 , Q
4 is alternately turned on and off at a low frequency, and switching elements Q 3 , Q 4 are turned on at a high frequency only for a certain period in the vicinity of the inversion of the polarity.
Are alternately turned on and off, so that the discharge lamp La has a positive DC voltage when viewed from the intermediate tap c of the output transformer T of the inverter circuit 2 → a high-frequency rectangular wave voltage → an intermediate tap c of the output transformer T of the inverter circuit 2. The discharge lamp La is lit by being repeatedly applied in the order of a negative DC voltage → a high-frequency rectangular wave voltage → a positive DC voltage as viewed from the intermediate tap c of the output transformer T of the inverter circuit 2.

【0017】(実施例2)図5は本実施例の回路構成を
示しており、本実施例の場合、実施例1のインバータ回
路2の出力トランスTの中間タップcを省略してその代
わりにスイッチング素子Q5 、Q6 の直列回路をダイオ
ードD3 〜D6 からなるダイオードブリッジの出力端間
に接続し、両スイッチング素子Q5 、Q6 の接続点を放
電灯Laの一端に接続している。更に実施例1の平滑用
のコンデンサC2 、C3 を省略してその代わりに平滑用
のコンデンサC4 を放電灯Laと並列に接続している。
また放電灯Laのフィラメントf1 、f2 の予熱は、出
力トランスTに予熱巻線nA,nB を設け、夫々の予熱
巻線nA ,nB の出力をダイオードDa、Dbと、コン
デンサCa,Cbとで整流平滑して得られる直流により
行うようになっている。そしてスイッチング素子Q3
6 と、Q4 ,Q5 とを交互に駆動回路3の制御信号で
オンオフし、図3、図4に示すように低周波の期間
1 、t3 と、極性反転の近傍の高周波の期間t2 とが
設定される。
(Embodiment 2) FIG. 5 shows the circuit configuration of this embodiment. In the case of this embodiment, the intermediate tap c of the output transformer T of the inverter circuit 2 of Embodiment 1 is omitted and replaced with it. A series circuit of switching elements Q 5 and Q 6 is connected between the output ends of a diode bridge composed of diodes D 3 to D 6, and the connection point of both switching elements Q 5 and Q 6 is connected to one end of a discharge lamp La. There is. Further, the smoothing capacitors C 2 and C 3 of the first embodiment are omitted, and instead the smoothing capacitor C 4 is connected in parallel with the discharge lamp La.
The preheating of the filament f 1, f 2 of the discharge lamp La, a preheating winding n A to the output transformer T, a n B is provided, each of the preheating coils n A, n output diode Da of B, a Db, capacitor A direct current obtained by rectifying and smoothing with Ca and Cb is used. And the switching element Q 3 ,
Q 6 and Q 4 and Q 5 are alternately turned on and off by the control signal of the drive circuit 3, and as shown in FIGS. 3 and 4, low frequency periods t 1 and t 3 and high frequency near the polarity reversal The period t 2 is set.

【0018】而して本実施例も実施例1と同様に、放電
灯Laには正の直流電圧→高周波の矩形波電圧→負の直
流電圧→高周波の矩形波電圧→正の直流電圧の順で繰り
返して印加されて、放電灯Laの点灯が行われる。尚上
記の各実施例ではダブルスポットの発生の予熱手段とし
て直流電源を用いているが、低周波のランプ電流と位相
差を持つ予熱電流を流す手段や高周波の予熱電流を流す
手段を用いてもよい。
As in the case of the first embodiment, the discharge lamp La has a positive DC voltage → a high frequency rectangular wave voltage → a negative DC voltage → a high frequency rectangular wave voltage → a positive DC voltage. Are repeatedly applied in step S3, and the discharge lamp La is turned on. In each of the above embodiments, a DC power source is used as the preheating means for generating the double spot, but a means for supplying a preheating current having a phase difference with the low frequency lamp current or a means for supplying a high frequency preheating current may be used. Good.

【0019】[0019]

【発明の効果】本発明は、低周波の矩形波のランプ電流
の極性を反転させる近傍の期間のみ高周波のランプ電流
を放電灯に流すので、スポットの移動を速くすることが
でき、その結果人の目にちらつきを感じさせないという
効果があり、しかも主なるランプ電流が低周波の矩形波
であるから、正、負の直流点灯期間が長くなって、放電
灯から発生する放射雑音も低減でき、更に矩形波点灯で
あるので直流点灯のようなカタホリシス現象がなくな
り、ランプ寿命が短くなることはないという効果があ
る。
According to the present invention, since the high-frequency lamp current is passed through the discharge lamp only in the vicinity of the period when the polarity of the low-frequency rectangular wave lamp current is inverted, the spot movement can be made faster, and as a result, Has the effect of not causing flicker in the eyes, and since the main lamp current is a low-frequency rectangular wave, the positive and negative DC lighting periods become longer, and the radiation noise generated from the discharge lamp can also be reduced. Further, since the rectangular wave lighting is used, the catalysis phenomenon such as the DC lighting is eliminated, and the lamp life is not shortened.

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

【図1】本発明の実施例1の回路構成図である。FIG. 1 is a circuit configuration diagram of a first embodiment of the present invention.

【図2】同上のインバータ回路の回路構成図である。FIG. 2 is a circuit configuration diagram of the above inverter circuit.

【図3】同上の動作説明用波形図である。FIG. 3 is a waveform diagram for explaining the operation of the above.

【図4】同上の動作説明用の拡大波形図である。FIG. 4 is an enlarged waveform diagram for explaining the above-mentioned operation.

【図5】本発明の実施例2の回路構成図である。FIG. 5 is a circuit configuration diagram of a second embodiment of the present invention.

【図6】従来例の動作説明用波形図である。FIG. 6 is a waveform diagram for explaining the operation of a conventional example.

【図7】同上のダブルスポットの発生説明図である。FIG. 7 is an explanatory diagram of occurrence of double spots in the above.

【符号の説明】[Explanation of symbols]

1 直流電源 2 インバータ回路 3 駆動回路 T 出力トランス D3 〜D6 ダイオード C2 、C3 コンデンサ DC1 、DC2 直流電源 La 放電灯 Q3 ,Q4 スイッチング素子 f1 ,f2 フィラメント イ、ロ スポット発生位置1 DC power supply 2 Inverter circuit 3 Drive circuit T Output transformer D 3 to D 6 Diode C 2 , C 3 capacitor DC 1 , DC 2 DC power supply La Discharge lamp Q 3 , Q 4 Switching element f 1 , f 2 Filament Y, Spot occurrence position

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】フィラメントを有する放電灯に低周波の矩
形波のランプ電流を流す点灯手段と、ダブルスポットを
発生させる予熱手段とを備えた放電灯点灯装置におい
て、前記低周波の矩形波のランプ電流の極性を反転させ
る近傍の期間のみ高周波のランプ電流を放電灯に流すこ
とを特徴とする放電灯点灯装置。
1. A discharge lamp lighting device comprising a lighting means for supplying a low-frequency rectangular-wave lamp current to a discharge lamp having a filament, and a preheating means for generating a double spot, wherein the low-frequency rectangular-wave lamp is used. A discharge lamp lighting device, characterized in that a high-frequency lamp current is passed through the discharge lamp only in the vicinity of the time when the polarity of the current is reversed.
JP27644492A 1992-10-15 1992-10-15 Electric discharge lamp lighting device Withdrawn JPH06132088A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27644492A JPH06132088A (en) 1992-10-15 1992-10-15 Electric discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27644492A JPH06132088A (en) 1992-10-15 1992-10-15 Electric discharge lamp lighting device

Publications (1)

Publication Number Publication Date
JPH06132088A true JPH06132088A (en) 1994-05-13

Family

ID=17569517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27644492A Withdrawn JPH06132088A (en) 1992-10-15 1992-10-15 Electric discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JPH06132088A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001185376A (en) * 1999-12-28 2001-07-06 Hitachi Media Electoronics Co Ltd Electric source for lighting discharge lamp
KR100545996B1 (en) * 2002-10-15 2006-01-25 김기정 Electronic Ballasts for Metal Halide Lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001185376A (en) * 1999-12-28 2001-07-06 Hitachi Media Electoronics Co Ltd Electric source for lighting discharge lamp
JP4650815B2 (en) * 1999-12-28 2011-03-16 株式会社日立メディアエレクトロニクス Discharge lamp lighting power supply device and video display device having the same
KR100545996B1 (en) * 2002-10-15 2006-01-25 김기정 Electronic Ballasts for Metal Halide Lamps

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