JP3393296B2 - Cold cathode discharge tube and method of manufacturing the same - Google Patents
Cold cathode discharge tube and method of manufacturing the sameInfo
- Publication number
- JP3393296B2 JP3393296B2 JP2000213689A JP2000213689A JP3393296B2 JP 3393296 B2 JP3393296 B2 JP 3393296B2 JP 2000213689 A JP2000213689 A JP 2000213689A JP 2000213689 A JP2000213689 A JP 2000213689A JP 3393296 B2 JP3393296 B2 JP 3393296B2
- Authority
- JP
- Japan
- Prior art keywords
- tube
- cold cathode
- discharge electrode
- discharge
- cathode discharge
- 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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Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】Detailed Description of the Invention
【０００１】[0001]
【発明の属する技術分野】本発明は、冷陰極放電管及び
その製造方法に関し、特に液晶表示装置のバックライト
として使用するのに好適な小径で明るい冷陰極放電管及
びその製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold cathode discharge tube and a method for manufacturing the same, and more particularly to a cold cathode discharge tube having a small diameter and suitable for use as a backlight of a liquid crystal display device and a method for manufacturing the same. .
【０００２】[0002]
【従来の技術】従来、ノート型パーソナルコンピュータ
などに使用されている液晶表示装置にあっては、液晶セ
ルの裏面にバックライトと称される発光装置が配設され
ており、その一つの手段として光を透過する導光板の一
辺に冷陰極放電管を配してなるサイドライト方式が多く
用いられている。2. Description of the Related Art Conventionally, in a liquid crystal display device used in a notebook personal computer or the like, a light emitting device called a backlight is arranged on the back surface of a liquid crystal cell. A side light system in which a cold cathode discharge tube is arranged on one side of a light guide plate that transmits light is often used.
【０００３】[0003]
【発明が解決しようとする課題】近年、ノート型パーソ
ナルコンピュータの小型軽量化が要請されていることか
ら、サイドライト方式のバックライトにあっても、導光
板を薄くしたり冷陰極放電管の管径を細くすることが求
められている。しかしながら、バックライトに使用され
ている従来の冷陰極放電管は、管の内壁に蛍光体層を形
成し内部に水銀蒸気を封入した冷陰極蛍光放電管である
ことから、管内部に蛍光体層を形成するためにはある程
度の太さの管径が必要であり、製造技術的には外径を
１．８ｍｍ程度以下にすることは不可能であった。In recent years, there has been a demand for downsizing and weight saving of notebook personal computers. Therefore, even in a sidelight type backlight, the light guide plate can be made thin or the tube of a cold cathode discharge tube can be used. It is required to reduce the diameter. However, since the conventional cold cathode discharge tube used for the backlight is a cold cathode fluorescent discharge tube in which a phosphor layer is formed on the inner wall of the tube and mercury vapor is sealed inside, a phosphor layer inside the tube is used. It is necessary to have a tube diameter with a certain degree of thickness in order to form the, and it is impossible to reduce the outer diameter to about 1.8 mm or less in terms of manufacturing technology.
【０００４】そのため、図６に示すごとく、２．０ｍｍ
厚の導光板の側面に配置されている従来の冷陰極放電管
２１にあっては、導光板２２の方向以外に照射される光
が、冷陰極放電管２１を囲繞する反射層２３で反射した
後、再び冷陰極放電管２１内を通ることで減衰してしま
うというロスが生じていた。その具体例としては、入射
側２．２ｍｍ厚の導光板に２．０ｍｍ径の冷陰極放電管
を使用した場合の入射効率を基準にとると、１．８ｍｍ
径の冷陰極放電管の入射効率は１５％増となり、それ以
下ではさらに増加することが知られている。このことか
ら、入射効率を向上させるために、導光板の厚さ２．０
ｍｍに対して、外径を１．５ｍｍよりも小さくした小径
な冷陰極放電管が必要となっていた。Therefore, as shown in FIG. 6, 2.0 mm
In the conventional cold cathode discharge tube 21 arranged on the side surface of the thick light guide plate, light emitted in a direction other than the direction of the light guide plate 22 is reflected by the reflection layer 23 surrounding the cold cathode discharge tube 21. After that, there was a loss of being attenuated by passing through the cold cathode discharge tube 21 again. As a specific example, when the cold-cathode discharge tube having a diameter of 2.0 mm is used for the light guide plate having a thickness of 2.2 mm on the entrance side, 1.8 mm is used as a reference for the incidence efficiency.
It is known that the incidence efficiency of a cold cathode discharge tube having a diameter increases by 15%, and further increases below that. From this, in order to improve the incidence efficiency, the thickness of the light guide plate is 2.0
A cold cathode discharge tube having a small diameter with an outer diameter smaller than 1.5 mm was required.
【０００５】さらに、冷陰極放電管の製造方法の一例と
して、図５に示すごとく、まず内壁に蛍光体層を形成し
たガラス製の管体２４の両端に放電電極２５を位置させ
るとともに、管中央には水銀ゲッター２６を入れるため
の管２７を接続している。つぎに、管体２４の両端を封
止し、管２７部分から真空に引き放電ガスを入れて管２
７先端を封止する。そして、水銀ゲッター２６から水銀
蒸気を管体２４内に導き、最後に管２７を管体２４との
接続部分で封じ切るものである。これにより、冷陰極放
電管の中央部分には管２７を封じ切る処理による歪みや
蛍光体層のむらが生じ、これにより輝度むらが生じるお
それがあった。Further, as an example of a method for manufacturing a cold cathode discharge tube, as shown in FIG. 5, first, a discharge electrode 25 is located at both ends of a glass tube 24 having a phosphor layer formed on the inner wall thereof, and the tube center is formed. A tube 27 for inserting the mercury getter 26 is connected to the. Next, both ends of the tubular body 24 are sealed, a vacuum is drawn from the portion of the tubular body 27, a discharge gas is introduced, and
7 Seal the tip. Then, mercury vapor is guided from the mercury getter 26 into the tube body 24, and finally the tube 27 is completely sealed at the connection portion with the tube body 24. As a result, the central portion of the cold cathode discharge tube is distorted due to the process of sealing the tube 27 and the phosphor layer is uneven, which may cause uneven brightness.
【０００６】そこで、このような問題を解決すべく、本
発明にあっては、液晶表示装置に好適に使用されるべく
管径を細くし、かつ発光ロスを防ぐことができるととも
に、輝度むらを生じるおそれのない冷陰極放電管及びそ
の製造方法の提供を目的とする。Therefore, in order to solve such a problem, in the present invention, the tube diameter can be made thin so that it can be suitably used in a liquid crystal display device, and the light emission loss can be prevented, and the uneven brightness can be obtained. An object of the present invention is to provide a cold cathode discharge tube and a method of manufacturing the same, which are unlikely to occur.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するた
め、本発明の冷陰極放電管は、放電電極を封入した１対
の放電電極封入管の間に、該放電電極封入管よりも外径
が細い発光管を上記放電電極封入管に対し直角に折曲し
た状態で連通状に接続するとともに、上記発光管の外面
に蛍光体層を形成することを特徴とするものである。外
径が１．５〜１．０ｍｍの細管にあっては、その内面に
蛍光体層を均一に塗布することが困難であるとともに、
高真空にする製法自体も困難である。そのため、このよ
うな小口径の場合には本発明のごとく発光管の外面に蛍
光体層を形成し、その両端に放電電極を封入した外径が
３〜４ｍｍの通常使用される管を接続することで、発光
部の外径が１．５〜１．０ｍｍで暗部（ダークエリア）
のない好適な冷陰極放電管を得ることができる。In order to achieve the above object, the cold cathode discharge tube of the present invention has an outer diameter larger than that of the discharge electrode sealed tube between a pair of discharge electrode sealed tubes in which discharge electrodes are sealed. Bend the thin arc tube at a right angle to the discharge electrode sealed tube.
Connected in the open state and connected to the outer surface of the above arc tube.
It is characterized in that a phosphor layer is formed on. In the case of a thin tube having an outer diameter of 1.5 to 1.0 mm, it is difficult to uniformly apply the phosphor layer on the inner surface thereof,
It is also difficult to make a high vacuum. Therefore, in the case of such a small diameter, a phosphor layer is formed on the outer surface of the arc tube as in the present invention, and a commonly used tube having an outer diameter of 3 to 4 mm with a discharge electrode enclosed is connected to both ends thereof. Therefore, the outer diameter of the light emitting part is 1.5 to 1.0 mm and the dark part (dark area)
It is possible to obtain a suitable cold cathode discharge tube having no
【０００８】また本発明の冷陰極放電管の製造方法は、
放電電極を封入した１対の放電電極封入管の間に、該放
電電極封入管よりも外径が細い発光管を上記放電電極封
入管に対し直角に折曲した状態で連通状に接続するとと
もに、上記放電電極封入管内には水銀ゲッター材を予め
配設しておき、次に放電電極封入管と発光管の内部を真
空状態とした後、上記水銀ゲッター材が配置された放電
電極封入管部分を封じ切ることを特徴とするものであ
る。The method of manufacturing a cold cathode discharge tube according to the present invention is
An arc tube having an outer diameter smaller than that of the discharge electrode enclosing tube is inserted between the pair of discharge electrode enclosing tubes enclosing the discharge electrode.
The discharge tube is connected at a right angle to the inlet tube so as to be connected to each other, and a mercury getter material is previously arranged in the discharge electrode sealing tube, and then the discharge electrode sealing tube and the arc tube are evacuated. After that, the discharge electrode enclosing tube portion in which the mercury getter material is arranged is sealed off.
【０００９】[0009]
【発明の実施の形態】図１は、本発明の冷陰極放電管の
第１の実施例を示しており、冷陰極放電管１は外径が２
〜３ｍｍの石英管内に放電電極２を内部に封入してなる
１対の並列状の放電電極封入管３の間に、放電電極封入
管３よりも管の外径を細くして（例えば１ｍｍ）かつそ
の外周面に蛍光体層を形成した長さが２００〜２５０ｍ
ｍの石英管からなる発光管４の両端を接続した構成とし
ている。１対の放電電極封入管３は、発光管４の両端に
対し直角に折曲した状態で接続され、液晶表示装置の導
光板５の一端に対しコ字形状に密着して配設される。FIG. 1 shows a first embodiment of a cold cathode discharge tube according to the present invention, in which the cold cathode discharge tube 1 has an outer diameter of 2
The outer diameter of the tube is made smaller than that of the discharge electrode enclosing tube 3 (for example, 1 mm) between the pair of parallel discharge electrode enclosing tubes 3 in which the discharge electrode 2 is enclosed in a quartz tube of 3 mm. And the length of the phosphor layer formed on the outer peripheral surface is 200 to 250 m
Both ends of an arc tube 4 made of a quartz tube of m are connected. The pair of discharge electrode enclosing tubes 3 are connected to both ends of the arc tube 4 in a state of being bent at right angles, and are arranged in close contact with one end of the light guide plate 5 of the liquid crystal display device in a U-shape.
【００１０】図２（ａ）〜図２（ｃ）は、本発明の冷陰
極放電管１の製造方法を示している。まず、放電電極２
を内部に挿入した１対の放電電極封入管３を、間隔を置
いて並列状態に配置し、この２本の放電電極封入管３の
それぞれのほぼ中央部分に発光管４の両端を接続する。
一方の放電電極封入管３1における放電電極２と反対側
に水銀ゲッター６を配置するとともに、図２（ｂ）に示
すごとく、他方の放電電極封入管３2の先端３ａを除く
放電電極封入管３の端部３個所を封止する。そして、こ
の放電電極封入管３2の先端３ａから内部を真空に引く
とともに放電ガスを封入して、発光管４との接続部分で
封止する。2 (a) to 2 (c) show a method of manufacturing the cold cathode discharge tube 1 of the present invention. First, the discharge electrode 2
A pair of discharge electrode enclosing tubes 3 having the above-mentioned inside inserted therein are arranged in parallel at a distance, and both ends of the arc tube 4 are connected to substantially central portions of the two discharge electrode enclosing tubes 3, respectively.
A mercury getter 6 is arranged on the opposite side of the discharge electrode sealing tube 3 1 from the discharge electrode 2 and, as shown in FIG. 2B, the discharge electrode sealing tube 3 2 except for the tip 3a. The three end portions of 3 are sealed. Then, the interior of the discharge electrodes sealed tube 3 second distal end 3a by sealing with discharge gas pulling a vacuum, sealed with a connecting portion of the arc tube 4.
【００１１】そして、水銀ゲッター６から水銀蒸気を発
光管４内に導き、一方の放電電極封入管３1を発光管４
との接続部分で封止する。蛍光体層が外面の場合には、
発光管４の外周面に、蛍光体粉末を直線塗布したり、蛍
光体粉末を接着性のバインダーに混入して塗着したり、
または蛍光体を練り込んだり表面に蛍光体膜を被着した
蛍光体フィルム体を被覆したりすることで蛍光体層を配
設することで、本発明の冷陰極放電管１が完成する。Then, mercury vapor is guided from the mercury getter 6 into the arc tube 4, and one discharge electrode enclosing tube 3 1 is connected to the arc tube 4.
Seal at the connection part with. If the phosphor layer is on the outside,
On the outer peripheral surface of the arc tube 4, the phosphor powder is linearly applied, or the phosphor powder is mixed with an adhesive binder to be applied.
Or by disposing a phosphor layer by the deposited phosphor film on the surface of Ri Kneaded phosphor phosphor film body or cover, the cold cathode discharge tube 1 of the present invention is completed.
【００１２】このようにして、図１に示すごとく、本発
明の冷陰極放電管１にあっては導光板５の入射側に暗部
（ダークエリア）のない発光管４のみを配置することが
可能となり、導光板５に対して輝度むらのない均質で好
適な光を照射することができるとともに、放電電極封入
管３を導光板５の側面に配置することにより、導光板５
の側部に放電電極封入管３を収納効率よく配置すること
ができるものである。In this way, as shown in FIG. 1, in the cold cathode discharge tube 1 of the present invention, it is possible to arrange only the arc tube 4 having no dark area on the incident side of the light guide plate 5. Therefore, it is possible to irradiate the light guide plate 5 with uniform and suitable light having no brightness unevenness, and by disposing the discharge electrode enclosing tube 3 on the side surface of the light guide plate 5,
The discharge electrode enclosing tube 3 can be arranged on the side portion of the with a high storage efficiency.
【００１３】図３は、上述した第１の実施例の冷陰極放
電管１の使用状態を示し、導光板５の一端に沿って冷陰
極放電管１を配設するとともに、冷陰極放電管１の外周
には反射板７を囲繞して配設している。このように、導
光板５の厚さに比較して冷陰極放電管１の発光管４を細
くすることで、発光管４からの光は、導光板５方向以外
に向かう光も反射板７で反射してそのまま好適に導光板
５へと向かうことができるものである。FIG. 3 shows the use state of the cold cathode discharge tube 1 of the first embodiment described above. The cold cathode discharge tube 1 is arranged along one end of the light guide plate 5 and the cold cathode discharge tube 1 is provided. A reflection plate 7 is arranged around the outer periphery of the. In this way, by making the light emitting tube 4 of the cold cathode discharge tube 1 thinner than the thickness of the light guide plate 5, the light from the light emitting tube 4 is reflected by the reflection plate 7 even if the light goes in directions other than the light guide plate 5 direction. The light can be reflected and directly directed to the light guide plate 5 as it is.
【００１４】このような構成からなる本発明の冷陰極放
電管にあっては、１．５〜１．０ｍｍの細管の場合に
は、蛍光体を発光管の外周面に形成するので、管体の外
径寸法に制限されることなくどのように細い管であって
も蛍光体層を形成することができ、また従来の冷陰極放
電管のごとく管内の水銀による蛍光体の輝度低下も防止
することができる。In the cold cathode discharge tube of the present invention having such a structure, in the case of a thin tube of 1.5 to 1.0 mm, the phosphor is formed on the outer peripheral surface of the arc tube. It is possible to form a phosphor layer regardless of how thin the tube is, without being restricted by the outer diameter of the tube, and also to prevent the brightness of the phosphor from being lowered by mercury in the tube as in the conventional cold cathode discharge tube. be able to.
【００１５】また、本発明の冷陰極放電管の構成を、ネ
オン管などのガス放電管に応用させることも可能であ
り、これにより暗部（ダークエリア）がなく輝度むらの
ない放電管が得られる。Further, the structure of the cold cathode discharge tube of the present invention can be applied to a gas discharge tube such as a neon tube, whereby a discharge tube having no dark part (dark area) and no uneven brightness can be obtained. .
【００１６】[0016]
【発明の効果】以上詳述した如く、本発明によれば、冷
陰極放電管における発光部位である発光管を従来になく
細くすることができ、これにより液晶表示装置の小型軽
量化に大いに貢献することができるものである。また、
冷陰極放電管を細くすることで、バックライトにおける
反射層に反射する光を再び放電管を通過させることなく
導光板へ導くことができ、発光ロスを防ぐことができ
る。As described above in detail, according to the present invention, the arc tube, which is the light emitting portion of the cold cathode discharge tube, can be made thinner than ever before, which greatly contributes to the reduction in size and weight of the liquid crystal display device. Is what you can do. Also,
By thinning the cold cathode discharge tube, the light reflected by the reflective layer in the backlight can be guided to the light guide plate without passing through the discharge tube again, and light emission loss can be prevented.
【００１７】また、放電電極を封入した１対の放電電極
封入管の間に、該放電電極封入管よりも外径が細い発光
管を上記放電電極封入管に対し直角に折曲した状態で連
通状に接続するとともに、上記放電電極封入管内には水
銀ゲッター材を予め配設しておき、次に放電電極封入管
と発光管の内部を真空状態とした後、上記水銀ゲッター
材が配置された放電電極封入管部分を封じ切ることで、
発光管を放電電極封入管よりも細くすることが可能とな
るとともに、従来水銀ゲッター材を配置した管を放電管
の中央で封じ切ることで発生していた管面の歪み等によ
る輝度むらをなくすことができる。Further, an arc tube having an outer diameter smaller than that of the discharge electrode enclosing tube is connected between a pair of discharge electrode enclosing tubes enclosing the discharge electrode in a state of being bent at a right angle to the discharge electrode enclosing tube. <br/> Connected in the same way, and water is contained in the discharge electrode sealed tube.
By previously disposing a silver getter material, and then making a vacuum state inside the discharge electrode enclosing tube and the arc tube, by sealing off the discharge electrode enclosing tube portion in which the mercury getter material is arranged,
It is possible to make the arc tube thinner than the discharge electrode sealed tube, and eliminate the uneven brightness caused by the distortion of the tube surface that was generated by sealing the tube in which the mercury getter material was placed in the center of the discharge tube. be able to.
【００１８】また、発光管は内部に水銀蒸気を封入し管
面に蛍光体層を形成することで、放電電極間の放電によ
り生じる紫外線が蛍光体層を励起して好適な発光が得ら
れる。Further, by enclosing mercury vapor inside the arc tube and forming the phosphor layer on the tube surface, the ultraviolet rays generated by the discharge between the discharge electrodes excite the phosphor layer to obtain suitable light emission.
【００１９】また、蛍光体層を発光管の外面に形成する
ことで、内面に蛍光体層を形成する場合と比較して発光
管を細くすることが可能となる。Further, by forming the phosphor layer on the outer surface of the arc tube, it becomes possible to make the arc tube thinner than in the case where the phosphor layer is formed on the inner surface.
【００２０】また、１対の放電電極封入管は、中間に介
在する発光管に対し直角に折曲した状態に位置すること
で、液晶表示装置のバックライトにおける導光板の一辺
に発光管のみを配置させることにより、輝度むらのない
好適な光の照射が得られるとともに、放電電極封入管を
導光板の側部に収納効率よく配置することができる。Further, the pair of discharge electrode enclosing tubes are positioned in a state of being bent at a right angle to the arc tube interposed in the middle, so that only the arc tube is provided on one side of the light guide plate in the backlight of the liquid crystal display device. By arranging it, it is possible to obtain suitable irradiation of light without unevenness in brightness, and it is possible to arrange the discharge electrode enclosure tube in the side portion of the light guide plate with high storage efficiency.
【図１】本発明の冷陰極放電管の第１の実施例を示す説
明図である。FIG. 1 is an explanatory view showing a first embodiment of a cold cathode discharge tube of the present invention.
【図２】本発明の冷陰極放電管の第１の実施例の製造方
法を示す説明図である。FIG. 2 is an explanatory view showing the manufacturing method of the first embodiment of the cold cathode discharge tube of the present invention.
【図３】本発明の冷陰極放電管の使用状態を示す説明図
である。FIG. 3 is an explanatory view showing a usage state of the cold cathode discharge tube of the present invention.
【図４】従来の冷陰極放電管の製造方法を示す説明図で
ある。 FIG. 4 is an explanatory view showing a conventional method for manufacturing a cold cathode discharge tube.
is there.
【図５】従来の冷陰極放電管の使用状態を示す説明図で
ある。 FIG. 5 is an explanatory view showing a usage state of a conventional cold cathode discharge tube.
is there.
１ 冷陰極放電管 ２ 放電電極 ３ 放電電極封入管 ４ 発光管 ５ 導光板 ６ 水銀ゲッター ７ 反射板 ８ 冷陰極放電管 ９ 放電電極封入管 １０ 発光管 1 Cold cathode discharge tube 2 discharge electrodes 3 Discharge electrode sealed tube 4 arc tube 5 Light guide plate 6 Mercury getter 7 Reflector 8 Cold cathode discharge tube 9 Discharge electrode sealed tube 10 arc tube
Claims (2)
管の間に、該放電電極封入管よりも外径が細い発光管を
上記放電電極封入管に対し直角に折曲した状態で連通状
に接続するとともに、上記発光管の外面に蛍光体層を形
成することを特徴とする冷陰極放電管。1. An arc tube having an outer diameter smaller than that of the discharge electrode-enclosed tube is provided between a pair of discharge electrode-enclosed tubes in which the discharge electrodes are encapsulated.
The discharge electrode encapsulation tube was bent at a right angle and connected in a communicating manner, and a phosphor layer was formed on the outer surface of the arc tube.
A cold cathode discharge tube characterized by being formed .
管の間に、該放電電極封入管よりも外径が細い発光管を
上記放電電極封入管に対し直角に折曲した状態で連通状
に接続するとともに、上記放電電極封入管内には水銀ゲ
ッター材を予め配設しておき、次に放電電極封入管と発
光管の内部を真空状態とした後、上記水銀ゲッター材が
配置された放電電極封入管部分を封じ切ることを特徴と
する冷陰極放電管の製造方法。2. An arc tube having an outer diameter smaller than that of the discharge electrode-enclosed tube is provided between the pair of discharge electrode-enclosed tubes in which the discharge electrodes are encapsulated.
The discharge electrode enclosing tube is bent at a right angle and connected in a communicating manner, and a mercury getter material is previously arranged in the discharge electrode enclosing tube. A method for manufacturing a cold cathode discharge tube, characterized in that the inside of the arc tube is evacuated, and then the discharge electrode enclosing tube portion in which the mercury getter material is arranged is closed.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000213689A JP3393296B2 (en) | 2000-07-14 | 2000-07-14 | Cold cathode discharge tube and method of manufacturing the same |
| TW90116998A TW521299B (en) | 2000-07-14 | 2001-07-11 | Discharge tube and back projecting lamp using same and making method thereof |
| CNB011200936A CN1142459C (en) | 2000-07-14 | 2001-07-13 | Discharge tube and back projecting lamp using same and making method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000213689A JP3393296B2 (en) | 2000-07-14 | 2000-07-14 | Cold cathode discharge tube and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002033078A JP2002033078A (en) | 2002-01-31 |
| JP3393296B2 true JP3393296B2 (en) | 2003-04-07 |
Family
ID=18709400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000213689A Expired - Fee Related JP3393296B2 (en) | 2000-07-14 | 2000-07-14 | Cold cathode discharge tube and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3393296B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009272065A (en) * | 2008-04-30 | 2009-11-19 | Kurihara Kogyo:Kk | Uv lamp |
-
2000
- 2000-07-14 JP JP2000213689A patent/JP3393296B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2002033078A (en) | 2002-01-31 |
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