JP2003308991A - Discharge lamp lighting device - Google Patents
Discharge lamp lighting deviceInfo
- Publication number
- JP2003308991A JP2003308991A JP2002148388A JP2002148388A JP2003308991A JP 2003308991 A JP2003308991 A JP 2003308991A JP 2002148388 A JP2002148388 A JP 2002148388A JP 2002148388 A JP2002148388 A JP 2002148388A JP 2003308991 A JP2003308991 A JP 2003308991A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- lamp lighting
- duty
- signal
- circuit
- 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
Links
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は調光機能を有する放
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 having a dimming function.
【０００２】[0002]
【従来の技術】オンデューティ可変のＰＷＮ（パルス幅
変調）信号を送出する信号回路を備え、前記信号回路に
応動し前記ＰＷＮ信号のオンデューティが大きくなるに
したがって出力を低減し該オンデューティが所定値以上
のときに該出力がゼロとなるインバータ形放電灯点灯回
路を備え、前記インバータ形放電灯点灯回路の出力を受
けて点灯する放電灯を備えた放電灯点灯装置は既知であ
る。この場合は前記オンデューティが所定値以上（連続
信号ハイレベルの場合を含む）ときに放電灯が消灯す
る。2. Description of the Related Art A signal circuit for transmitting a PWN (pulse width modulation) signal with a variable on-duty is provided, and the output is reduced as the on-duty of the PWN signal increases in response to the signal circuit and the on-duty is predetermined. A discharge lamp lighting device is known which includes an inverter type discharge lamp lighting circuit whose output becomes zero when the value is equal to or more than a value, and a discharge lamp which lights by receiving the output of the inverter type discharge lamp lighting circuit. In this case, the discharge lamp is turned off when the on-duty is a predetermined value or more (including the case where the continuous signal is at a high level).
【０００３】[0003]
【発明が解決しようとする課題】ＰＷＭ信号を出力する
信号回路の故障について考える。ＰＷＮ信号が出ない状
態はオンデューティが結果においてゼロとなり、インバ
ータ形放電灯点灯回路を介して放電灯が全光点灯する。
この場合は照明が確保できるので、支障の程度は低い。
逆にハイレベルの直流信号が出る故障モードのときは、
オンデューティが結果において最大となり、インバータ
形放電灯点灯回路の出力がゼロとなり、放電灯は不本意
に消灯する。故障を直し復旧させるまでの間は消灯す
る。安全確保等のための照明が不可欠である施設、店舗
等では困る。一時的消灯であっても業務に差し支えるケ
ースもあり、その場合にも困る。本発明の目的はＰＷＮ
信号を出力する信号回路が故障しても、照明を確保する
ことのできる放電灯点灯装置を提供することである。Consider a failure of a signal circuit that outputs a PWM signal. In the state where the PWN signal is not output, the on-duty becomes zero as a result, and the discharge lamp is fully illuminated via the inverter type discharge lamp lighting circuit.
In this case, since the lighting can be secured, the degree of hindrance is low.
Conversely, in the failure mode where a high level DC signal is output,
The on-duty becomes the maximum in the result, the output of the inverter type discharge lamp lighting circuit becomes zero, and the discharge lamp is turned off unintentionally. It goes off until the fault is repaired and recovered. This is a problem for facilities and stores where lighting is essential for ensuring safety. In some cases, even if the lights are temporarily turned off, it may interfere with the work. The object of the present invention is PWN
It is an object of the present invention to provide a discharge lamp lighting device that can secure illumination even if a signal circuit that outputs a signal fails.
【０００４】[0004]
【課題を解決するための手段】請求項１に対応する本発
明は、オンデューティ可変のＰＷＮ信号を送出する信号
回路を備え、前記信号回路に応動し前記ＰＷＮ信号のオ
ンデューティが大きくなるにしたがって出力を低減し該
オンデューティが第一所定値以上のときに該出力がゼロ
となるインバータ形放電灯点灯回路を備え、前記インバ
ータ形放電灯点灯回路の出力を受けて点灯する放電灯を
備えた放電灯点灯装置を前提とする。そして、前記オン
デューティが前記第一所定値を越えた第二所定値以上の
ときに前記インバータ形放電灯点灯回路が出力状態を保
持し前記放電灯を点灯させるように工夫する。これだ
と、前記信号回路の故障がハイレベルの直流信号が出る
モードであっても照明を確保することができる。請求項
２に対応する本発明は、オンデューティ可変のＰＷＮ信
号を送出する信号回路を備え、前記信号回路に応動し前
記ＰＷＮ信号のオンデューティが小さくなるにしたがっ
て出力を低減し該オンデューティが第一所定値以下のの
ときに該出力がゼロとなるインバータ形放電灯点灯回路
を備え、前記インバータ形放電灯点灯回路の出力を受け
て点灯する放電灯を備えた放電灯点灯装置を前提とす
る。そして、前記オンデューティが前記第一所定値を下
回る第二所定値以下のときに前記インバータ形放電灯点
灯回路が出力状態を保持し前記放電灯を点灯させるよう
に工夫する。これだと、前記信号回路の故障がＰＷＮ信
号が出ないオンデューティゼロのモードであっても照明
を確保することができる。The present invention corresponding to claim 1 is provided with a signal circuit for transmitting a PWN signal having a variable on-duty, and as the on-duty of the PWN signal increases in response to the signal circuit. An inverter type discharge lamp lighting circuit is provided which reduces the output and makes the output zero when the on-duty is equal to or more than a first predetermined value, and a discharge lamp which is lit by receiving the output of the inverter type discharge lamp lighting circuit is provided. It is premised on a discharge lamp lighting device. Then, when the on-duty is equal to or more than a second predetermined value exceeding the first predetermined value, the inverter type discharge lamp lighting circuit holds the output state and lights the discharge lamp. In this case, the illumination can be secured even in the mode in which the high-level DC signal is output due to the failure of the signal circuit. The present invention corresponding to claim 2 is provided with a signal circuit for transmitting a PWN signal having a variable on-duty, and the output is reduced as the on-duty of the PWN signal decreases in response to the signal circuit. It is premised on a discharge lamp lighting device including an inverter type discharge lamp lighting circuit whose output becomes zero when the value is one predetermined value or less, and a discharge lamp which lights by receiving the output of the inverter type discharge lamp lighting circuit. . Then, when the on-duty is equal to or less than a second predetermined value that is less than the first predetermined value, the inverter type discharge lamp lighting circuit holds an output state and lights the discharge lamp. In this case, even if the failure of the signal circuit is in the on-duty zero mode in which the PWN signal is not output, the illumination can be secured.
【０００５】[0005]
【発明の実施の形態】請求項１に対応する発明の実施形
態を図１〜図３を参照して説明する。図示の放電灯点灯
装置は、オンデューティ可変のＰＷＮ信号（図２）を送
出する信号回路１を備える。信号回路１に応動し前記Ｐ
ＷＮ信号のオンデューティが大きくなるにしたがって出
力を低減し該オンデューティが第一所定値以上のときに
該出力がゼロとなるインバータ形放電灯点灯回路２を備
える。インバータ形放電灯点灯回路２の出力を受けて点
灯する放電灯３を備える。図示の放電灯３は蛍光ランプ
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention corresponding to claim 1 will be described with reference to FIGS. The illustrated discharge lamp lighting device includes a signal circuit 1 that sends out a PWN signal (FIG. 2) whose on-duty is variable. In response to the signal circuit 1, the P
The inverter type discharge lamp lighting circuit 2 is provided which reduces the output as the on-duty of the WN signal increases and makes the output zero when the on-duty is a first predetermined value or more. A discharge lamp 3 is provided which is lit by receiving the output of the inverter type discharge lamp lighting circuit 2. The illustrated discharge lamp 3 is a fluorescent lamp.
【０００６】前記オンデューティが前記第一所定値（図
３の９５％）を越えた第二所定値（図３の１００％）以
上のときにインバータ形放電灯点灯回路２が出力状態を
保持し放電灯３を点灯させる。図２のＰＷＮ信号は一定
周波数であるが、その中のオン期間ｔ１と全体周期ｔ２
の比をオンデューティとし、それに調光度に見合う信号
的意味を持たせる。調光度は放電灯３の明るさの程度に
対応し、１００％の場合は放電灯３の全光点灯に対応
し、０％の場合は消灯に対応する。放電灯３等の特性上
の理由で、調光度２５％程度が限界であり、それよりも
微弱な光出力は望めない。信号回路１は補助スイッチン
グ素子１２・主スイッチング素子１４等を含み、図２の
ＰＷＮ信号を形成し、インバータ形放電灯点灯回路２へ
送信する。信号回路１の補助スイッチング素子１２に与
えられる原信号波形は参照する図外の基準鋸歯状波形と
所望の入力直流波形の交点を波形立上がり点あるいは波
形立下り点として作る。インバータ形放電灯点灯回路２
は図２のＰＷＮ信号をホトカプラ２２を介して、マイコ
ン制御方式の回路本体２４へ取込む。回路本体２４中の
記憶手段に図３特性のデータが保持されており、与えら
れたＰＷＮ信号に応動する。回路本体２４はＰＷＮ信号
のオンデューティが例えば６０％の場合は、それに見合
った調光度の光出力が放電灯３に得られるように制御す
る。インバータ形放電灯点灯回路２の本体回路２４はイ
ンバータ周波数可変形であり、よく知られているように
周波数を高めるにその出力が低減し、放電灯３の光出力
も低減する。マイコン制御の仕組み（制御プログラム）
は図３のオンデューティの高さに見合う調光度の適宜の
インバータ周波数を選択することであり、具体的には図
外のインバータ用スイッチング素子のオンオフ期間を適
宜に制御することである。When the on-duty is equal to or more than the second predetermined value (100% in FIG. 3) exceeding the first predetermined value (95% in FIG. 3), the inverter type discharge lamp lighting circuit 2 holds the output state. The discharge lamp 3 is turned on. Although the PWN signal in FIG. 2 has a constant frequency, the ON period t1 and the total period t2 therein are constant.
The ratio of is set to on-duty, and it has a signal meaning corresponding to the dimming degree. The dimming degree corresponds to the brightness of the discharge lamp 3, 100% corresponds to full lighting of the discharge lamp 3, and 0% corresponds to extinction. Due to the characteristics of the discharge lamp 3 and the like, the dimming degree is about 25%, and a weaker light output than that is not expected. The signal circuit 1 includes an auxiliary switching element 12, a main switching element 14 and the like, forms the PWN signal of FIG. 2 and transmits it to the inverter type discharge lamp lighting circuit 2. For the original signal waveform given to the auxiliary switching element 12 of the signal circuit 1, the intersection of the reference sawtooth waveform (not shown) and the desired input DC waveform is formed as the waveform rising point or the waveform falling point. Inverter type discharge lamp lighting circuit 2
Takes in the PWN signal of FIG. 2 to the circuit body 24 of the microcomputer control system through the photo coupler 22. Data of the characteristic shown in FIG. 3 is held in the storage means in the circuit body 24, and responds to the given PWN signal. When the on-duty of the PWN signal is, for example, 60%, the circuit body 24 controls the discharge lamp 3 to obtain a light output with a dimming degree corresponding to the on-duty. The main body circuit 24 of the inverter type discharge lamp lighting circuit 2 is of an inverter frequency variable type. As is well known, its output decreases as the frequency is increased, and the light output of the discharge lamp 3 also decreases. Microcomputer control mechanism (control program)
Is to select an appropriate inverter frequency with a dimming degree that matches the on-duty height in FIG. 3, and specifically to appropriately control the on / off period of the inverter switching element (not shown).
【０００７】図３について補足する。図３はインバータ
形放電灯点灯回路２の本体回路２４における記憶手段に
保持されている制御特性である。オンデューティ（％）
が０〜５％の区間は調光度１００％（全光点灯）の状態
である。５〜９４％の区間では直線的に調光度を低減す
る。９４％となると、調光度２５％（最小調光）の状態
となる。そして、９５％（第一所定値）以上の区間では
調光度０％の消灯状態となる。ここまでは従来同様であ
る。本発明は第一所定値を越えた区間に第二所定値を設
定する。図示の第一所定値を９４％とすると、第二所定
値を９５〜１００％の範囲に設定する。図示例の第二所
定値は１００％である。この第二所定値以上となると、
図示例では調光度１００％の全光点灯となる。調光度１
００％の全光点灯とするかどうかは例示的であり、適宜
の調光度（ただし消灯状態を含まない）とすることがで
きる。図１の信号回路１の故障について、改めて考え
る。最終出力段の主半導体スイッチング素子１４がオー
プンモード破損の場合は、図２のＰＷＭ信号が出力され
ないので、オンデューティはゼロと見なされ、調光度１
００％で全体点灯となる。しかし、消灯はしないので、
問題の程度は低い。本発明はこの点を問題視しない。一
方、主半導体スイッチング素子１４がショートモード破
損の場合は、図２のＰＷＭ信号波形が直流電圧状とな
り、オンデューティは１００％と見なされる。本発明の
場合はこのときに例えば１００％で点灯する。従来にお
いては消灯するが、本発明においては点灯を維持する。
このため、安全の理由で消灯を忌避する施設等であって
も、問題がない。特に放電灯３が多数あるか、あるいは
故障中の信号回路１の傘下に同様の多数のインバータ形
放電灯点灯回路２が付属する場合の全消灯は危険である
が、本発明の場合は点灯を維持するので問題がない。A supplement will be given to FIG. FIG. 3 shows control characteristics held in the storage means in the main body circuit 24 of the inverter type discharge lamp lighting circuit 2. On duty (%)
Is a state where the dimming degree is 100% (all lights are on). In the section of 5 to 94%, the dimming degree is linearly reduced. At 94%, the dimming degree becomes 25% (minimum dimming). Then, in the section of 95% (first predetermined value) or more, the light is turned off with the dimming degree of 0%. Up to this point, the process is the same as the conventional one. According to the present invention, the second predetermined value is set in the section that exceeds the first predetermined value. If the illustrated first predetermined value is 94%, the second predetermined value is set in the range of 95 to 100%. The second predetermined value in the illustrated example is 100%. When this second predetermined value or more,
In the illustrated example, all-light lighting is performed with a dimming degree of 100%. Dimming degree 1
Whether to turn on all lights at 00% is an example, and it is possible to set an appropriate dimming degree (however, excluding the extinguished state). Consider again the failure of the signal circuit 1 of FIG. When the main semiconductor switching element 14 at the final output stage is damaged in the open mode, the PWM signal of FIG. 2 is not output, so the on-duty is regarded as zero, and the dimming degree is 1
When it is 00%, all lights are on. However, since it does not turn off,
The degree of the problem is low. The present invention does not consider this point as a problem. On the other hand, when the main semiconductor switching element 14 is damaged in the short mode, the PWM signal waveform of FIG. 2 has a DC voltage and the on-duty is regarded as 100%. In the case of the present invention, at this time, the light is turned on at 100%, for example. It is turned off in the related art, but is kept turned on in the present invention.
Therefore, there is no problem even in a facility that avoids turning off the lights for safety reasons. Especially when there are a large number of discharge lamps 3 or when a large number of similar inverter type discharge lamp lighting circuits 2 are attached under the signal circuit 1 which is in failure, it is dangerous to turn off all lights, but in the case of the present invention, it is necessary to turn on the lights. There is no problem because it keeps.
【０００８】信号回路１のＰＷＭ信号の形成が明るさを
検知するセンサーに応動してなされる場合がある。ある
いは図外のロータリースイッチ等を用いるマニュアル操
作（人手による操作）でなされる場合がある。後者の場
合について補足する。たとえば、ロータリースイッチを
図３のオンデューティが高くなる方向へ回すが、常態で
は第二所定値（たとえば１００％）未満で止まり、その
節を越えてさらに回すためには、余分な回転トルクを加
える方式とすることが得策である。これだと、通常は従
来同様の操作方法となり、不用意に第二所定値（たとえ
ば１００％）を越えて回してしまう誤操作がなくなる。In some cases, the PWM signal of the signal circuit 1 is formed in response to a sensor for detecting brightness. Alternatively, it may be performed by manual operation (manual operation) using a rotary switch or the like (not shown). The latter case will be supplemented. For example, the rotary switch is turned in the direction in which the on-duty increases in FIG. 3, but normally it stops below the second predetermined value (for example, 100%), and in order to further turn beyond that node, an extra rotational torque is applied. It is a good idea to adopt the method. In this case, the operation method is usually the same as the conventional one, and there is no erroneous operation inadvertently turning beyond the second predetermined value (for example, 100%).
【０００９】次に請求項２の発明について説明する。図
３の特性を左右対称にする。これを便宜的に変形図３と
する。図３においては、オンデューティが小さくなるに
したがって調光度は低下する。変形図３においては、オ
ンデューティが大きくなるにしたがって調光度は低下す
る。しかして、後者であっても調光制御上は同効であ
る。この場合の本発明による放電灯点灯装置は次の通り
となる。オンデューティ可変のＰＷＮ信号を送出する信
号回路１（便宜的に図示符号を引用する、以下同様であ
る）を備え、信号回路１に応動し前記ＰＷＮ信号のオン
デューティが小さくなるにしたがって出力を低減し該オ
ンデューティが第一所定値以下ののときに該出力がゼロ
となるインバータ形放電灯点灯回路２を備え、インバー
タ形放電灯点灯回路２の出力を受けて点灯する放電灯３
を備え、前記オンデューティが前記第一所定値を下回る
第二所定値以下のときにインバータ形放電灯点灯回路２
が出力状態を保持し放電灯３を点灯させる。説明を補足
する。上記の場合のインバータ形放電灯点灯回路２も所
要のオンデューティを受けたときに、それを予め保持し
てある変形図３の特性と比較し、それに対応する調光度
を求める。よって、先の図３発明との相違点は、ＰＷＭ
信号の参照対象として図３特性データを記憶しておく
か、変形図３特性データを記憶しておくかの違いであ
る。変形図３特性の場合は、信号回路１中の主半導体ス
イッチング素子１４がオープンモード破損の場合であっ
ても不所望な消灯を免れることが可能となる。ちなみ
に、変形図３に第二所定値以下の特性を付与しない場合
は消灯する。Next, the invention of claim 2 will be described. The characteristics shown in FIG. 3 are symmetrical. This is referred to as a modified diagram 3 for convenience. In FIG. 3, the dimming degree decreases as the on-duty decreases. In the modified diagram 3, the dimming degree decreases as the on-duty increases. However, even the latter has the same effect on dimming control. The discharge lamp lighting device according to the present invention in this case is as follows. A signal circuit 1 for sending a PWN signal with a variable on-duty (referred to by reference numerals for convenience, the same applies below) is provided, and the output is reduced as the on-duty of the PWN signal decreases in response to the signal circuit 1. The discharge lamp 3 is provided with an inverter type discharge lamp lighting circuit 2 whose output becomes zero when the on-duty is less than or equal to a first predetermined value, and which receives the output of the inverter type discharge lamp lighting circuit 2 and lights.
And an inverter type discharge lamp lighting circuit 2 when the on-duty is equal to or less than a second predetermined value below the first predetermined value.
Keeps the output state and turns on the discharge lamp 3. Supplement the explanation. When the inverter type discharge lamp lighting circuit 2 in the above case also receives the required on-duty, it is compared with the characteristic of the modified FIG. 3 which is held in advance, and the dimming degree corresponding thereto is obtained. Therefore, the difference from the previous invention of FIG.
The difference lies in whether the characteristic data of FIG. 3 or the modified characteristic data of FIG. 3 is stored as a signal reference target. In the case of the characteristic of the modified FIG. 3, even if the main semiconductor switching element 14 in the signal circuit 1 is damaged in the open mode, it is possible to avoid undesired turning off. By the way, when the characteristic of the second predetermined value or less is not given to the modified diagram 3, the light is turned off.
【００１０】[0010]
【発明の効果】本発明は、オンデューティが第一所定値
を越えた第二所定値以上のときにインバータ形放電灯点
灯回路が出力状態を保持し放電灯を点灯させる方式であ
る。あるいはオンデューティが第一所定値を下回る第二
所定値以下のときにインバータ形放電灯点灯回路が出力
状態を保持し前記放電灯を点灯させる方式である。これ
によれば、ＰＷＮを形成する信号回路が故障した場合で
あっても、照明を確保することが可能であり、放電灯点
灯装置利用上の安全性が高まる。The present invention is a system in which the inverter type discharge lamp lighting circuit holds the output state and lights the discharge lamp when the on-duty exceeds the second predetermined value which exceeds the first predetermined value. Alternatively, when the on-duty is below a second predetermined value below the first predetermined value, the inverter type discharge lamp lighting circuit holds the output state and lights the discharge lamp. According to this, even if the signal circuit forming the PWN fails, it is possible to secure the illumination, and the safety in using the discharge lamp lighting device is enhanced.
【図１】本発明に係る放電灯点灯装置の回路図である。FIG. 1 is a circuit diagram of a discharge lamp lighting device according to the present invention.
【図２】その信号回路から出るＰＷＭ信号の波形図であ
る。FIG. 2 is a waveform diagram of a PWM signal output from the signal circuit.
【図３】オンデューティと調光度の関係を示す特性図で
ある。FIG. 3 is a characteristic diagram showing a relationship between on-duty and dimming degree.
１：信号回路、２：インバータ形放電灯点灯回路、３：
放電灯、１２：補助スイッチング素子、１４：主スイッ
チング素子、２２：ホトカプラ、２４：回路本体、ｔ
１：オン期間、ｔ２：全体周期1: Signal circuit, 2: Inverter type discharge lamp lighting circuit, 3:
Discharge lamp, 12: auxiliary switching element, 14: main switching element, 22: photocoupler, 24: circuit body, t
1: ON period, t2: Overall cycle
Claims (2)
る信号回路を備え、前記信号回路に応動し前記ＰＷＮ信
号のオンデューティが大きくなるにしたがって出力を低
減し該オンデューティが第一所定値以上のときに該出力
がゼロとなるインバータ形放電灯点灯回路を備え、前記
インバータ形放電灯点灯回路の出力を受けて点灯する放
電灯を備えた放電灯点灯装置において、 前記オンデューティが前記第一所定値を越えた第二所定
値以上のときに前記インバータ形放電灯点灯回路が出力
状態を保持し前記放電灯を点灯させることを特徴とする
放電灯点灯装置。1. A signal circuit for transmitting a PWN signal having a variable on-duty, the output is reduced as the on-duty of the PWN signal increases in response to the signal circuit, and the on-duty is a first predetermined value or more. A discharge lamp lighting device comprising an inverter type discharge lamp lighting circuit whose output sometimes becomes zero, and a discharge lamp lighting by receiving an output of the inverter type discharge lamp lighting circuit, wherein the on-duty is the first predetermined value. A discharge lamp lighting device, wherein the inverter type discharge lamp lighting circuit holds the output state and lights the discharge lamp when the value exceeds a second predetermined value exceeding the value.
る信号回路を備え、前記信号回路に応動し前記ＰＷＮ信
号のオンデューティが小さくなるにしたがって出力を低
減し該オンデューティが第一所定値以下のときに該出力
がゼロとなるインバータ形放電灯点灯回路を備え、前記
インバータ形放電灯点灯回路の出力を受けて点灯する放
電灯を備えた放電灯点灯装置において、 前記オンデューティが前記第一所定値を下回る第二所定
値以下のときに前記インバータ形放電灯点灯回路が出力
状態を保持し前記放電灯を点灯させることを特徴とする
放電灯点灯装置。2. A signal circuit for transmitting a PWN signal having a variable on-duty, the output is reduced as the on-duty of the PWN signal becomes smaller in response to the signal circuit, and the on-duty is below a first predetermined value. A discharge lamp lighting device comprising an inverter type discharge lamp lighting circuit whose output sometimes becomes zero, and a discharge lamp lighting by receiving an output of the inverter type discharge lamp lighting circuit, wherein the on-duty is the first predetermined value. A discharge lamp lighting device, wherein the inverter type discharge lamp lighting circuit holds the output state and lights the discharge lamp when the value is equal to or less than a second predetermined value which is less than the value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002148388A JP2003308991A (en) | 2002-04-15 | 2002-04-15 | Discharge lamp lighting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002148388A JP2003308991A (en) | 2002-04-15 | 2002-04-15 | Discharge lamp lighting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003308991A true JP2003308991A (en) | 2003-10-31 |
Family
ID=29397871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002148388A Pending JP2003308991A (en) | 2002-04-15 | 2002-04-15 | Discharge lamp lighting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003308991A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005213A (en) * | 2005-06-27 | 2007-01-11 | Toshiba Lighting & Technology Corp | Fluorescent lamp lighting device and illumination fixture |
| JP2008091061A (en) * | 2006-09-29 | 2008-04-17 | Matsushita Electric Works Ltd | Electrodeless discharge lamp lighting device and illumination fixture thereof |
-
2002
- 2002-04-15 JP JP2002148388A patent/JP2003308991A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007005213A (en) * | 2005-06-27 | 2007-01-11 | Toshiba Lighting & Technology Corp | Fluorescent lamp lighting device and illumination fixture |
| JP2008091061A (en) * | 2006-09-29 | 2008-04-17 | Matsushita Electric Works Ltd | Electrodeless discharge lamp lighting device and illumination fixture thereof |
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