JPH06188087A - Lighting device for rare gas discharge lamp - Google Patents
Lighting device for rare gas discharge lampInfo
- Publication number
- JPH06188087A JPH06188087A JP33424992A JP33424992A JPH06188087A JP H06188087 A JPH06188087 A JP H06188087A JP 33424992 A JP33424992 A JP 33424992A JP 33424992 A JP33424992 A JP 33424992A JP H06188087 A JPH06188087 A JP H06188087A
- Authority
- JP
- Japan
- Prior art keywords
- rare gas
- discharge lamp
- gas discharge
- voltage
- pair
- 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 Lamps And Accessories Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、内面に蛍光体被膜を形
成した外囲器の内部に希ガスを封入し、外囲器の外面に
対向する一対の電極を形成した希ガス放電灯の点灯装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rare gas discharge lamp in which a rare gas is enclosed inside an envelope having a phosphor coating on its inner surface and a pair of electrodes facing each other is formed on the outer surface of the envelope. Regarding lighting device.
【０００２】[0002]
【従来の技術】ファクシミリやＯＣＲなどのＯＡ機器の
原稿読取用光源として、ガラスバルブに水銀を封入した
冷陰極型水銀放電灯が一般的である。この種放電灯は、
光束の立ち上がりが悪い、周囲温度に明るさが影響を受
け易く、経時変化が大きくて短寿命である等の問題があ
る。2. Description of the Related Art A cold cathode mercury discharge lamp having a glass bulb filled with mercury is generally used as a light source for reading originals in OA equipment such as facsimiles and OCRs. This kind of discharge lamp
There are problems that the rising of the luminous flux is poor, that the brightness is easily affected by the ambient temperature, the change over time is large, and the life is short.
【０００３】そこで、近年はＯＡ機器の原稿読取用光源
として、例えばガラスバルブにキセノンガスを主成分と
する希ガスを封入した希ガス放電灯が後述する理由で注
目されている。この希ガス放電灯は、本出願人が提案し
たものであって、特開平３−２２５７４５号公報などに
開示されているように、細長い管状ガラスバルブの内面
に蛍光体被膜を、外面に一対の帯状電極を被着形成し、
ガラスバルブ内に希ガスを封入した構造で、一対の帯状
電極に高周波電圧を印加することで点灯する。Therefore, in recent years, as a light source for reading originals of OA equipment, for example, a rare gas discharge lamp in which a rare gas containing xenon gas as a main component is sealed in a glass bulb has been attracting attention for a reason to be described later. This rare gas discharge lamp has been proposed by the present applicant, and as disclosed in Japanese Patent Application Laid-Open No. 3-225745, a phosphor coating is provided on the inner surface of a long and narrow tubular glass bulb and a pair of outer surface is provided with a phosphor coating. Forming a strip electrode,
It has a structure in which a rare gas is enclosed in a glass bulb, and is turned on by applying a high frequency voltage to a pair of strip electrodes.
【０００４】図３及び図４に上記希ガス放電灯（1）と
その点灯装置（6）の具体例を示し、説明する。希ガス
放電灯（1）は、外囲器例えば細長い直管状のガラスバ
ルブ（2）を備える。ガラスバルブ（2）の軸方向の一部
に光投射窓（2a）が設けられ、ガラスバルブ（2）の光
投射窓（2a）の内面を除く内面に蛍光体被膜（3）が被
着される。ガラスバルブ（2）の蛍光体被膜（3）と対向
する外面に一対の帯状電極（4）（5）が対向させて被着
形成される。一対の帯状電極（4）（5）は、ガラスバル
ブ（2）のほぼ全長に亘る長さのアルミニウム箔など
で、反射膜を兼用する。帯状電極（4）（5）を含むガラ
スバルブ（2）上に、必要に応じて透明な絶縁被膜（図
示せず）が被覆される。また、ガラスバルブ（2）内に
キセノンガスを主成分とする希ガスが所定の封入圧で封
入され、ガラスバルブ（2）の両端が封止される。3 and 4 show specific examples of the rare gas discharge lamp (1) and its lighting device (6), which will be described. The rare gas discharge lamp (1) includes an envelope, for example, an elongated straight tubular glass bulb (2). A light projection window (2a) is provided on a part of the glass bulb (2) in the axial direction, and a phosphor coating (3) is applied to the inner surface of the glass bulb (2) excluding the inner surface. It A pair of strip electrodes (4) and (5) are formed on the outer surface of the glass bulb (2) facing the phosphor coating (3) so as to face each other. The pair of strip-shaped electrodes (4) (5) are aluminum foil or the like having a length substantially over the entire length of the glass bulb (2), and also serve as reflective films. A transparent insulating coating (not shown) is coated on the glass bulb (2) including the strip electrodes (4) (5), if necessary. Further, a rare gas containing xenon gas as a main component is sealed in the glass bulb (2) at a predetermined sealing pressure, and both ends of the glass bulb (2) are sealed.
【０００５】希ガス放電灯（1）の点灯装置（6）は、例
えば２４Ｖの直流電圧Ｅ1を２５００Ｖp-p、２５ＫＨｚ
の高周波電圧Ｅ2に変換するインバータ点灯回路（9）を
備える。電源スイッチ（8）をオンして、インバータ点
灯回路（9）の高周波電圧Ｅ2が希ガス放電灯（1）の一
対の帯状電極（4）（5）に印加されると、ガラスバルブ
（2）内の放電空間（ｍ）にキセノンガスの放電（励起
線波長１４７ｎｍ）が生じて、蛍光体被膜（3）が励起
され発光する。発光した蛍光体被膜（3）の光が直接
に、また、反射膜である帯状電極（4）（5）を反射して
ガラスバルブ（2）の光投射窓（2a）から外部に投射さ
れ、図示しない原稿を照射する。The lighting device (6) of the rare gas discharge lamp (1) uses a DC voltage E1 of 24 V, for example, 2500 Vp-p, 25 KHz.
Inverter lighting circuit (9) for converting into high frequency voltage E2. When the power switch (8) is turned on and the high frequency voltage E2 of the inverter lighting circuit (9) is applied to the pair of strip electrodes (4) (5) of the rare gas discharge lamp (1), the glass bulb (2) Discharge of the xenon gas (excitation line wavelength 147 nm) occurs in the discharge space (m) inside, and the phosphor coating (3) is excited and emits light. The emitted light of the phosphor coating (3) is directly projected to the outside through the light projection window (2a) of the glass bulb (2) after being reflected by the strip electrodes (4) (5) which are reflective films. Irradiate a document (not shown).
【０００６】希ガス放電灯（1）は、電源スイッチ（8）
のオンからの光束の立ち上がりに優れる、明るさや放電
電圧が周囲温度にほとんど影響を受けない、しかも、長
寿命である利点を備えるため、ファックスなどＯＡ機器
の原稿読取用光源として有望視されている。The rare gas discharge lamp (1) has a power switch (8).
Since it has excellent light flux rise from ON, brightness and discharge voltage are hardly affected by ambient temperature, and has a long life, it is promising as a light source for original reading of OA equipment such as fax machines. .
【０００７】[0007]
【発明が解決しようとする課題】上記希ガス放電灯
（1）は、明るい場所ではガラスバルブ（2）内の放電空
間（ｍ）が外来光による光電効果で放電し易い状態に維
持されているため、電源スイッチ（8）のオンとほぼ同
時に点灯して問題は無い。In the above rare gas discharge lamp (1), the discharge space (m) in the glass bulb (2) is maintained in a bright place to be easily discharged by the photoelectric effect by external light. Therefore, there is no problem because the power switch (8) lights up almost at the same time.
【０００８】ところが、希ガス放電灯（1）をＯＡ機器
の筐体内のような暗い場所で点灯させる場合には、上述
の外来光による光電効果が阻害されるために放電し難く
なり、電源スイッチ（8）のオンから点灯するまでに１
秒前後の始動遅れが生ずるという問題があった。そのた
め、希ガス放電灯（1）を例えばファックスの原稿読取
用光源に使用した場合、ファックスが原稿読取り動作を
開始してから１秒前後の始動遅れ時間の間、希ガス放電
灯（1）が点灯せず、この間の原稿読取りができなくな
る不具合が発生することがあった。However, when the rare gas discharge lamp (1) is turned on in a dark place such as the case of an office automation equipment, it is difficult to discharge because the photoelectric effect due to the above-mentioned external light is obstructed, and the power switch is turned on. From turning on (8) to turning on 1
There was a problem that a start-up delay of about 2 seconds occurred. Therefore, when the rare gas discharge lamp (1) is used as a light source for reading a document of a fax, for example, the rare gas discharge lamp (1) is turned on during a start delay time of about 1 second after the fax starts the document reading operation. There was a problem that the original was not lit and the original could not be read during this period.
【０００９】本発明の目的とするところは、希ガス放電
灯の暗黒始動遅れの時間をＯＡ機器の原稿読取用光源と
して問題無い程度まで極力短くした希ガス放電灯の点灯
装置を提供することにある。It is an object of the present invention to provide a lighting device for a rare gas discharge lamp in which the dark start delay time of the rare gas discharge lamp is as short as possible as a document reading light source for OA equipment. is there.
【００１０】[0010]
【課題を解決するための手段】本発明は、外囲器の内面
に蛍光体被膜が形成され、外面に対向する一対の電極が
形成され、内部に希ガスが封入された希ガス放電灯を、
前記一対の電極間に高周波電圧を印加して点灯させる点
灯装置において、希ガス放電灯の消灯時に、希ガス放電
灯が点灯しない程度の電圧を、希ガス放電灯の一対の電
極に印加する始動補助電圧回路を付設することにより、
上記目的を達成するものである。The present invention provides a rare gas discharge lamp in which a phosphor coating is formed on the inner surface of an envelope, a pair of electrodes facing the outer surface is formed, and a rare gas is sealed inside. ,
In a lighting device that applies a high-frequency voltage between a pair of electrodes to light the lamp, a starter that applies a voltage to the pair of electrodes of the rare gas discharge lamp such that the rare gas discharge lamp does not light when the rare gas discharge lamp is turned off. By attaching an auxiliary voltage circuit,
The above object is achieved.
【００１１】[0011]
【作用】希ガス放電灯の消灯時に、その外囲器外面の一
対の電極に希ガス放電灯が点灯しない程度の交流或いは
直流の電圧を印加しておくと、放電し易い状態に維持さ
れる。その結果、希ガス放電灯が暗黒中に在っても、希
ガス放電灯を点灯させる所定の高周波電圧を一対の電極
に印加すると、この印加とほぼ同時に希ガス放電灯が点
灯し、始動遅れは無視できるほど短くなる。When the rare gas discharge lamp is turned off, if an AC or DC voltage that does not turn on the rare gas discharge lamp is applied to the pair of electrodes on the outer surface of the envelope, the rare gas discharge lamp can be easily discharged. . As a result, even when the rare gas discharge lamp is in the dark, if a predetermined high frequency voltage for lighting the rare gas discharge lamp is applied to the pair of electrodes, the rare gas discharge lamp lights up almost at the same time as this application, and the start delay occurs. Will be negligibly short.
【００１２】[0012]
【実施例】上記希ガス放電灯（1）の点灯装置に本発明
と適用した一実施例を、図１及び図２を参照して説明す
る。なお、図１の図３及び図４と同一、または、相当部
分には同一符号が付してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a lighting device for the above rare gas discharge lamp (1) will be described with reference to FIGS. The same or corresponding parts as those in FIGS. 3 and 4 of FIG. 1 are designated by the same reference numerals.
【００１３】図１に示される点灯装置（10）の従来との
相違点は、インバータ点灯回路（9）に次の始動補助電
圧回路（11）を付設したことのみである。始動補助電圧
回路（11）は、希ガス放電灯（1）の消灯時に外囲器例
えばガラスバルブ（2）外面の一対の電極例えば帯状電
極（4）（5）に所望の電圧（以下、始動補助電圧と称す
る）Ｅ3を常時印加する回路である。The only difference between the lighting device (10) shown in FIG. 1 and the conventional lighting device is that the following starting auxiliary voltage circuit (11) is attached to the inverter lighting circuit (9). The starting auxiliary voltage circuit (11) is a voltage (hereinafter referred to as a starting voltage) applied to a pair of electrodes on the outer surface of the envelope such as the glass bulb (2), for example, strip electrodes (4) and (5) when the rare gas discharge lamp (1) is turned off. A circuit for constantly applying E3 (referred to as auxiliary voltage).
【００１４】始動補助電圧Ｅ3は、希ガス放電灯（1）を
点灯させない程度の直流または交流の電圧であり、か
つ、ガラスバルブ（2）内の放電空間（ｍ）を帯状電極
（4）（5）間の電界の作用で活性化し、電子放出し易
い、放電し易い状態に維持する所定の大きさ以上の電圧
である。始動補助電圧Ｅ3の適正値は、ガラスバルブ
（2）の管径や誘電率、帯状電極（4）（5）の幅などで
決められる。The starting auxiliary voltage E3 is a DC or AC voltage that does not turn on the rare gas discharge lamp (1), and the discharge space (m) in the glass bulb (2) is connected to the strip electrode (4) ( It is a voltage above a predetermined level that is activated by the action of the electric field between 5) and maintains a state in which electrons are easily emitted and discharge is easy. The proper value of the starting auxiliary voltage E3 is determined by the tube diameter and the dielectric constant of the glass bulb (2), the width of the strip electrodes (4) (5), and the like.
【００１５】図１の点灯装置（10）は、希ガス放電灯
（1）を図２の電圧波形図に示すように点灯させる。希
ガス放電灯（1）の消灯時に、始動補助電圧回路（11）
が帯状電極（4）（5）に始動補助電圧Ｅ3を印加する。
この電圧印加で希ガス放電灯（1）が暗い場所に在って
も、常にガラスバルブ（2）内の放電空間（ｍ）が放電
し易い状態に維持される。この状態で電源スイッチ
（8）をオンして、インバータ点灯回路（9）から高周波
電圧Ｅ2を帯状電極（4）（5）に印加すると、ガラスバ
ルブ（2）内の放電空間（ｍ）が始動補助電圧Ｅ3で放電
し易い状態に維持されているので、希ガス放電灯（1）
は暗い場所に在っても、明るい場所と同様に電源スイッ
チ（8）のオンとほぼ同時に点灯する。The lighting device (10) of FIG. 1 lights the rare gas discharge lamp (1) as shown in the voltage waveform diagram of FIG. Starting auxiliary voltage circuit (11) when the rare gas discharge lamp (1) is turned off
Applies a starting auxiliary voltage E3 to the strip electrodes (4) and (5).
By applying this voltage, even if the rare gas discharge lamp (1) is in a dark place, the discharge space (m) in the glass bulb (2) is always maintained in a state of being easily discharged. When the power switch (8) is turned on in this state and the high frequency voltage E2 is applied to the strip electrodes (4) and (5) from the inverter lighting circuit (9), the discharge space (m) in the glass bulb (2) is started. The rare gas discharge lamp (1) is maintained because it is easily discharged by the auxiliary voltage E3.
Even in a dark place, turns on at the same time as when the power switch (8) is turned on, as in a bright place.
【００１６】なお、希ガス放電灯（1）の消灯時に始動
補助電圧Ｅ3を帯状電極（4）（5）に印加した場合、希
ガス放電灯（1）には極微小な洩れ電流が流れる程度
で、希ガス放電灯（1）の消灯時の消費電力の無駄は極
めて小さく、問題無い。When the starting auxiliary voltage E3 is applied to the strip electrodes (4) and (5) when the rare gas discharge lamp (1) is turned off, a minute leakage current flows through the rare gas discharge lamp (1). Therefore, the waste of power consumption when the rare gas discharge lamp (1) is turned off is extremely small, and there is no problem.
【００１７】希ガス放電灯（1）が暗い場所に在って
も、明るい場所と同様に点灯させる始動補助電圧Ｅ3の
具体例を、次の実験データに基づき説明する。A specific example of the starting auxiliary voltage E3 for lighting the rare gas discharge lamp (1) in the dark place in the same manner as in the bright place will be described based on the following experimental data.
【００１８】希ガス放電灯（1）をファクシミリの原稿
読取用光源として使用する場合の一例として、ガラスバ
ルブ（2）の管径が６ｍｍ、肉厚が０.５ｍｍ、全長が３
００ｍｍの希ガス放電灯（1）を用意する。この希ガス
放電灯（1）をインバータ点灯回路（9）で２５ＫＨｚ、
２５００Ｖp-pの高周波電圧Ｅ2で点灯させる前の消灯時
における始動補助電圧Ｅ3を交流１０〜１０００Ｖの範
囲で複数設定し、それぞれの暗黒始動遅れ時間Ｔを求
め、この暗黒始動遅れ時間Ｔがファクシミリの原稿読取
用光源として適当かどうかの評価結果を出したのが次の
表である。As an example of using the rare gas discharge lamp (1) as a light source for reading an original of a facsimile, the glass diameter of the glass bulb (2) is 6 mm, the wall thickness is 0.5 mm, and the total length is 3 mm.
A 00 mm rare gas discharge lamp (1) is prepared. This rare gas discharge lamp (1) is 25 KHz in the inverter lighting circuit (9),
A plurality of starting auxiliary voltages E3 are set in the range of 10 to 1000 V AC at the time of extinguishing before lighting with the high frequency voltage E2 of 2500 Vp-p, and each dark starting delay time T is calculated. The following table shows the evaluation results as to whether or not it is suitable as a light source for reading a document.
【００１９】[0019]
【表１】 [Table 1]
【００２０】上記表から分かるように、始動補助電圧Ｅ
3が５０Ｖ以上であれば始動遅れ時間Ｔが１００ｍＳと
極端に短くなるが、５０Ｖより小さくなると始動遅れ時
間Ｔが１秒以上と長くなる。希ガス放電灯（1）をファ
クシミリの原稿読取用光源として使用する場合、その始
動遅れ時間Ｔが３００ｍＳを超えると原稿読取りに支障
をきたすことがあるが、１００ｍＳ程度であれば原稿読
取りに何ら問題が無いことが、本発明者の実験により分
かっている。したがって、上記表の希ガス放電灯（1）
においては、始動補助電圧Ｅ3が５０Ｖ以上であればフ
ァクシミリの原稿読取用光源として合格であり、始動補
助電圧Ｅ3が５０Ｖより小さいと不合格である。As can be seen from the above table, the starting auxiliary voltage E
If 3 is 50 V or more, the start delay time T is extremely short, 100 mS, but if it is less than 50 V, the start delay time T is 1 second or longer. When the rare gas discharge lamp (1) is used as a light source for reading a document of a facsimile, if the start delay time T exceeds 300 mS, it may hinder the document reading, but if it is about 100 mS, there is no problem in reading the document. It is known from the experiment of the present inventor that there is no. Therefore, the rare gas discharge lamps in the above table (1)
When the starting auxiliary voltage E3 is 50 V or more, the light source is acceptable as a light source for reading an original of a facsimile, and when the starting auxiliary voltage E3 is less than 50 V, it is not acceptable.
【００２１】尚、本発明において、外囲器、電極の形状
は用途に応じて適宜に変更できる。また、用途はＯＡ機
器にのみ制約されない。更に、外囲器はガラスの他、セ
ラミック、樹脂なども使用できる。In the present invention, the shapes of the envelope and the electrodes can be appropriately changed depending on the application. Further, the use is not limited to the OA equipment. Further, the envelope may be made of glass, ceramic, resin or the like.
【００２２】[0022]
【発明の効果】本発明によれば、希ガス放電灯の消灯時
に、その一対の電極に希ガス放電灯が点灯しない程度の
電圧を印加したので、希ガス放電灯が暗黒中に在って
も、消灯時の電圧印加でガラスバルブ内の放電空間が放
電し易い状態に維持されて、希ガス放電灯を点灯させる
高周波電圧を一対の電極に印加するとほぼ同時に希ガス
放電灯が点灯して、希ガス放電灯の始動遅れの大幅な時
間短縮が可能となり、例えばファクシミリなどのＯＡ機
器の原稿読取用光源として好適な希ガス放電灯の提供が
可能となる。According to the present invention, when the rare gas discharge lamp is turned off, a voltage that does not turn on the rare gas discharge lamp is applied to the pair of electrodes, so that the rare gas discharge lamp is in the dark. Also, when the voltage is applied when the lamp is turned off, the discharge space inside the glass bulb is maintained in a state where it is easy to discharge, and when a high-frequency voltage that lights the rare gas discharge lamp is applied to the pair of electrodes, the rare gas discharge lamp lights at about the same time. It is possible to significantly reduce the start-up delay of the rare gas discharge lamp, and it is possible to provide a rare gas discharge lamp suitable as a light source for reading an original of an OA device such as a facsimile.
【図１】本発明の実施例を示す希ガス放電灯の断面図と
その点灯回路図FIG. 1 is a cross-sectional view of a rare gas discharge lamp showing an embodiment of the present invention and a lighting circuit diagram thereof.
【図２】図１点灯回路の電圧波形図FIG. 2 is a voltage waveform diagram of the lighting circuit shown in FIG.
【図３】従来の希ガス放電灯点灯装置の回路図FIG. 3 is a circuit diagram of a conventional rare gas discharge lamp lighting device.
【図４】図３の希ガス放電灯のＡ−Ａ線に沿う拡大断面
図FIG. 4 is an enlarged cross-sectional view taken along the line AA of the rare gas discharge lamp of FIG.
1 希ガス放電灯 2 外囲器〔ガラスバルブ〕 3 蛍光体被膜 4 電極 5 電極 10 点灯装置 11 始動補助電圧回路 1 Noble gas discharge lamp 2 Envelope (glass bulb) 3 Phosphor coating 4 Electrode 5 Electrode 10 Lighting device 11 Starting auxiliary voltage circuit
フロントページの続き (72)発明者 沖村 克行 大阪府大阪市中央区城見１丁目４番24号 日本電気ホームエレクトロニクス株式会社 内Continued Front Page (72) Inventor Katsuyuki Okimura 1-44 Jomi, Chuo-ku, Osaka-shi, Osaka NEC Home Electronics Co., Ltd.
Claims (1)
向する一対の電極がそれぞれ形成され、内部に希ガスが
封入された希ガス放電灯を、前記一対の電極間に高周波
電圧を印加して点灯させる点灯装置であって、 前記希ガス放電灯の消灯時に、希ガス放電灯が点灯しな
い程度の電圧を、前記一対の電極に印加する始動補助電
圧回路を付設したことを特徴とする希ガス放電灯の点灯
装置。1. A rare gas discharge lamp in which a phosphor coating is formed on the inner surface of an envelope and a pair of electrodes facing the outer surface, respectively, and a rare gas is sealed inside, and a high frequency voltage is applied between the pair of electrodes. Is a lighting device for applying a voltage to turn on the rare gas discharge lamp, and a starting auxiliary voltage circuit for applying a voltage to the pair of electrodes such that the rare gas discharge lamp does not light when the rare gas discharge lamp is turned off. Lighting device for rare gas discharge lamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33424992A JPH06188087A (en) | 1992-12-15 | 1992-12-15 | Lighting device for rare gas discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33424992A JPH06188087A (en) | 1992-12-15 | 1992-12-15 | Lighting device for rare gas discharge lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06188087A true JPH06188087A (en) | 1994-07-08 |
Family
ID=18275220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33424992A Pending JPH06188087A (en) | 1992-12-15 | 1992-12-15 | Lighting device for rare gas discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06188087A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997026779A1 (en) * | 1996-01-16 | 1997-07-24 | Ushio Denki Kabushiki Kaisya | Discharge lamp lighting device |
| WO1998035536A1 (en) * | 1997-02-05 | 1998-08-13 | Ushio Denki Kabushiki Kaisya | Discharge lamp turning-on device |
-
1992
- 1992-12-15 JP JP33424992A patent/JPH06188087A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997026779A1 (en) * | 1996-01-16 | 1997-07-24 | Ushio Denki Kabushiki Kaisya | Discharge lamp lighting device |
| WO1998035536A1 (en) * | 1997-02-05 | 1998-08-13 | Ushio Denki Kabushiki Kaisya | Discharge lamp turning-on device |
| US6084360A (en) * | 1997-02-05 | 2000-07-04 | Ushiodenki Kabushiki Kaisha | Device for operation of a discharge lamp |
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| A02 | Decision of refusal |
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