JP2000173550A - Outer surface electrode lamp - Google Patents
Outer surface electrode lampInfo
- Publication number
- JP2000173550A JP2000173550A JP10347166A JP34716698A JP2000173550A JP 2000173550 A JP2000173550 A JP 2000173550A JP 10347166 A JP10347166 A JP 10347166A JP 34716698 A JP34716698 A JP 34716698A JP 2000173550 A JP2000173550 A JP 2000173550A
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- outer peripheral
- peripheral surface
- external electrode
- sealed
- 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- Withdrawn
Links
- 239000011521 glass Substances 0.000 claims abstract description 124
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 239000011248 coating agent Substances 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims description 37
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 34
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 238000009423 ventilation Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 26
- 239000007789 gas Substances 0.000 description 23
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、スキャナーやコピ
ーなどにおける原稿読取り、あるいは液晶表示装置のバ
ックライト用光源に適する外面電極ランプに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external electrode lamp suitable for reading an original in a scanner or a copying machine, or as a light source for a backlight of a liquid crystal display device.
【０００２】[0002]
【従来の技術】たとえばスキャナー、コピー、液晶表示
装置などは、その普及とともに、高性能、高効率化、長
寿命化などが要求されており、それらの構成において、
原稿読取りや背面光源に使用するランプの高性能化など
が進められている。すなわち、この種のランプ（放電
灯）は、希ガス放電であるため、明るさや放電電圧が周
囲温度にほとんど影響されず、寿命も長いなどの特長が
利用されている。2. Description of the Related Art For example, scanners, copiers, liquid crystal display devices, and the like have been required to have high performance, high efficiency, and long life with the spread thereof.
The performance of lamps used for reading originals and as a back light source has been improved. That is, since this type of lamp (discharge lamp) is a rare gas discharge, its characteristics such as brightness and discharge voltage are hardly affected by ambient temperature and its life is long are utilized.
【０００３】そして、高性能化を図ったランプとして、
内壁面に蛍光体被膜が形成され、かつ水銀およびXeガス
を含む希ガスが封入されたガラス管と、前記ガラス管の
外周面に、そのほぼ全長に亘って、外部接続用リードに
連接する一対の帯状電極層を添設させた構成の外面電極
ランプが開発されている。[0003] As a lamp with high performance,
A glass tube in which a phosphor coating is formed on the inner wall surface and in which a rare gas containing mercury and Xe gas is sealed, and a pair of outer peripheral surfaces of the glass tube connected to external connection leads over substantially the entire length thereof. An external electrode lamp having a configuration in which a strip-shaped electrode layer is added has been developed.
【０００４】図５ (a)は従来の外面電極ランプの一構成
例を示す一部切り欠き横断面図、図５ (b)は従来の外面
電極ランプの構成を示す縦断面図である。FIG. 5A is a partially cutaway cross-sectional view showing an example of the configuration of a conventional external electrode lamp, and FIG. 5B is a longitudinal sectional view showing the configuration of a conventional external electrode lamp.
【０００５】図５ (a)， (b)において、１は発光管とし
て機能する気密封止のガラス管、２は前記ガラス管１の
内壁面に管軸方向に沿って一定の幅を除いて形成された
蛍光体被膜である。ここで、ガラス管１は、たとえば外
径 4〜15mm，長さ 100〜 500mm程度で、放電媒体として
の希ガス、たとえばXeガスを主体とした希ガスが封入さ
れている。In FIGS. 5 (a) and 5 (b), reference numeral 1 denotes a hermetically sealed glass tube which functions as an arc tube, and 2 denotes an inner wall surface of the glass tube 1 except for a fixed width along the tube axis direction. It is a phosphor film formed. Here, the glass tube 1 has, for example, an outer diameter of about 4 to 15 mm and a length of about 100 to 500 mm, and is filled with a rare gas as a discharge medium, for example, a rare gas mainly composed of Xe gas.
【０００６】また、3a，3bは前記ガラス管１の外周面に
管軸方向ほぼ全長に亘って、一体的に添設された一対の
帯状電極層、たとえば幅 5〜10mm程度、厚さ20〜 100μ
m 程度のアルミニウム箔などの導電性膜である。ここ
で、一対の帯状電極層3a，3bは、発光放射面とな成る側
の極間を幅広に設定する一方、高輝度を得るために非発
光放射面と成る側の極間を幅狭に設定されることもあ
る。Further, 3a and 3b are a pair of strip-like electrode layers integrally provided on the outer peripheral surface of the glass tube 1 over substantially the entire length in the tube axis direction, for example, a width of about 5 to 10 mm and a thickness of 20 to 20 mm. 100μ
It is a conductive film such as aluminum foil of about m. Here, the pair of strip-shaped electrode layers 3a and 3b are set to have a wide gap between the poles on the side serving as the light emitting surface, while narrowing the gap between the poles on the side serving as the non-light emitting surface to obtain high luminance. May be set.
【０００７】さらに、図示を省略したが、前記一対の帯
状電極層3a，3bに半田付けもしくは導電性接着剤にて接
続されたリード端子、前記リード端子に外部接続用リー
ドを半田付けによって電気的に接続する一方、前記帯状
電極層3a，3bを含むガラス管１の外周面を透光性樹脂フ
ィルムで被覆・保護している。ここで、透光性樹脂フィ
ルムは、外装ないしガラス管１の保護に寄与する一方、
帯状電極層3a，3bにおける沿面放電の防止など絶縁性を
確保する。Although not shown, a lead terminal is connected to the pair of strip-shaped electrode layers 3a and 3b by soldering or a conductive adhesive, and an external connection lead is electrically connected to the lead terminal by soldering. The outer peripheral surface of the glass tube 1 including the strip-shaped electrode layers 3a and 3b is covered and protected by a translucent resin film. Here, the translucent resin film contributes to protection of the exterior or the glass tube 1,
Insulation such as prevention of creeping discharge in the strip electrode layers 3a and 3b is ensured.
【０００８】上記外面電極ランプは、外部接続用リード
およびリード端子を介して、前記帯状電極層3a，3bに、
所要の高周波電圧を印加（たとえば20〜 100 KHz， 1〜
2KVの電力を供給）すると、帯状電極層3a，3b間で放電
が開始し、ガラス管１内で紫外線を放射する。こうして
放射された紫外線が、ガラス管１内壁面の蛍光体被膜２
によって、可視光線に変換されて光源として機能する。
つまり、ガラス管１の内壁面に蛍光体被膜が管軸方向に
沿って形成されていない一定の幅（アパーチャー）の領
域を光出射面として、所要の露光を得るように構成され
ている。The external electrode lamp is connected to the strip-shaped electrode layers 3a and 3b via external connection leads and lead terminals.
Apply the required high-frequency voltage (for example, 20 to 100 KHz, 1 to
When a power of 2 KV is supplied), discharge starts between the strip-shaped electrode layers 3a and 3b, and ultraviolet rays are radiated in the glass tube 1. The ultraviolet light thus emitted is applied to the phosphor coating 2 on the inner wall surface of the glass tube 1.
Is converted into visible light to function as a light source.
That is, it is configured to obtain a required exposure by using a region of a constant width (aperture) where the phosphor coating is not formed on the inner wall surface of the glass tube 1 along the tube axis direction as a light emitting surface.
【０００９】[0009]
【発明が解決しようとする課題】上記構成の外面電極ラ
ンプは、光束の立上がりが速いという利点を有するが、
露光用光源やバックライトとしての利用において、さら
なる大光量化や高効率化が要求されている。このような
要求に対応して、外面電極ランプに大電力を入力するこ
とが試みられている。しかし、この種の外面電極ランプ
は、一般的に、放電空間に対する単位面積当たりの入力
が大きいため、放電空間での温度上昇が著しく、長時間
点灯していると光束低下が生じるという不都合がある。
特に、大光量化や高効率化のために、外面電極ランプへ
の入力を大電力化すると、発熱が大きくなって、点灯か
ら数分間後の光量が減少する。つまり、点灯中における
光量の安定性が劣るため、露光用の光源などとしては実
用上問題がある。The external electrode lamp of the above construction has the advantage that the light flux rises quickly,
In use as a light source for exposure or a backlight, further increase in light amount and higher efficiency are required. In response to such a demand, attempts have been made to input a large amount of power to the external electrode lamp. However, this type of external electrode lamp generally has a large input per unit area to the discharge space, so that the temperature in the discharge space is significantly increased, and there is a disadvantage that the luminous flux is reduced when the lamp is lit for a long time. .
In particular, when the power to the external electrode lamp is increased to increase the amount of light and increase the efficiency, the amount of heat generated increases, and the amount of light several minutes after lighting is reduced. That is, since the stability of the light amount during lighting is inferior, there is a practical problem as a light source for exposure.
【００１０】本発明は、上記事情に対処してなされたも
ので、大光量化や高効率化が図られ、かつ点灯の安定性
がすぐれた外面電極ランプの提供を目的とする。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an external electrode lamp that achieves a large amount of light and high efficiency and has excellent lighting stability.
【００１１】[0011]
【課題を解決するための手段】請求項１の発明は、少な
くとも一端が開口した第１のガラス管と、前記第１のガ
ラス管に対し同心円的に配置され、第１のガラス管外周
面との間に気密な空間部を形成するため封止一体化され
た第２のガラス管と、前記第２のガラス管の内壁面に管
軸方向へ所要の幅を残して形成された蛍光体被膜と、前
記蛍光体被膜に対応する第２のガラス管外周面に対向的
に添設された一対の外部電極層と、前記第１のガラス管
外周面および第２のガラス管内壁面で形成する気密な空
間部に封入された少なくともXeガスを含む放電媒体とを
有することを特徴とする外面電極ランプである。According to a first aspect of the present invention, there is provided a first glass tube having at least one open end, and a first glass tube disposed concentrically with respect to the first glass tube and having an outer peripheral surface with the first glass tube. A second glass tube which is sealed and integrated to form an airtight space therebetween, and a phosphor coating formed on the inner wall surface of the second glass tube leaving a required width in the tube axis direction And a pair of external electrode layers provided so as to be opposed to the outer peripheral surface of the second glass tube corresponding to the phosphor coating, and airtightness formed by the outer peripheral surface of the first glass tube and the inner wall surface of the second glass tube. And a discharge medium containing at least Xe gas sealed in a simple space.
【００１２】請求項２の発明は、請求項１記載の外面電
極ランプにおいて、第１のガラス管内が通気路を成し、
放電媒体が封入された空間部の発熱を放熱させることを
特徴とする。According to a second aspect of the present invention, in the external electrode lamp according to the first aspect, the inside of the first glass tube forms a ventilation path,
It is characterized in that heat generated in the space in which the discharge medium is sealed is radiated.
【００１３】請求項３の発明は、請求項１もしくは請求
項２記載の外面電極ランプにおいて、気密な空間部を形
成する第１のガラス管外周面に蛍光体被膜が形成されて
いることを特徴とする。According to a third aspect of the present invention, in the outer electrode lamp according to the first or second aspect, a phosphor coating is formed on an outer peripheral surface of the first glass tube forming an airtight space. And
【００１４】請求項４の発明は、吸熱体を封装（封有）
した気密封止型の第１のガラス管と、前記第１のガラス
管に対し同心円的に配置され、第１のガラス管外周面と
の間に気密な空間部を形成するため封止一体化された第
２のガラス管と、前記第２のガラス管内壁面に管軸方向
の所要幅を残して形成された蛍光体被膜と、前記蛍光体
被膜に対応する第２のガラス管外周面に対向的に添設さ
れた一対の外部電極層と、前記第１のガラス管外周面お
よび第２のガラス管内壁面で形成する空間部に封入され
た少なくともXeガスを含む放電媒体とを有することを特
徴とする外面電極ランプである。According to a fourth aspect of the present invention, the heat absorber is sealed (sealed).
Sealingly integrated to form a hermetically sealed space between the first hermetically sealed first glass tube and the outer peripheral surface of the first glass tube, which are arranged concentrically with respect to the first glass tube. A second glass tube, a phosphor coating formed on the inner wall surface of the second glass tube leaving a required width in the tube axis direction, and an outer peripheral surface of the second glass tube corresponding to the phosphor coating. And a discharge medium containing at least Xe gas sealed in a space formed by the outer peripheral surface of the first glass tube and the inner wall surface of the second glass tube. External electrode lamp.
【００１５】請求項５の発明は、請求項４記載の外面電
極ランプにおいて、気密な空間部を形成する第１のガラ
ス管外周面に蛍光体被膜が形成されていることを特徴と
する。 請求項１〜５の発明に係る外面電極ランプは、
いわゆる二重管型であって、第２のガラス管の外周面
に、一対の帯状電極層を添設するとき、同時に透光性樹
脂フィルムによる被覆保護を行う方式を採ることができ
る。つまり、透光性樹脂フィルム片の一主面に、一対の
帯状電極層を予め担持させておき、かつその透光性樹脂
フィルム片の端縁部に、一方の帯状電極層の端縁を重ね
るように巻き付け・固定すると、製造工程の簡略化によ
る生産性の向上、さらには帯状電極層間の絶縁性も確実
化が図られる。According to a fifth aspect of the present invention, in the external electrode lamp according to the fourth aspect, a phosphor coating is formed on an outer peripheral surface of the first glass tube forming an airtight space. The external electrode lamp according to the invention of claims 1 to 5,
It is a so-called double tube type, and a method can be adopted in which when a pair of band-shaped electrode layers are provided on the outer peripheral surface of the second glass tube, the cover is simultaneously protected by a light-transmitting resin film. In other words, a pair of strip-shaped electrode layers is previously supported on one main surface of the light-transmitting resin film piece, and the edge of one strip-shaped electrode layer is overlapped with the edge of the light-transmitting resin film piece. By winding and fixing as described above, the productivity is improved by simplifying the manufacturing process, and the insulation between the strip-shaped electrode layers is also ensured.
【００１６】請求項１〜５の発明において、第１のガラ
ス管に対して同心的（同軸的に）に、かつ気密に配置一
体化する第２のガラス管は、前記第１のガラス管外周面
との間に発光する放電空間部を形成する。そして、紫外
線を可視光化する蛍光体膜が少なくとも第２のガラス管
内壁面に形成されている。ここで、蛍光体膜は、可視光
化の効率作用を期待する一方、第２のガラス管外周から
効率的に可視光を出射させるため、軸方向に沿って帯状
にガラス管面を露出させた（蛍光体膜を形成しない）領
域を残して形成されている。なお、可視光化の効率的な
作用を行うために、第１のガラス管外周面に蛍光体膜を
形成することもできる。In the first to fifth aspects of the present invention, the second glass tube concentrically (coaxially) and airtightly arranged and integrated with the first glass tube is an outer periphery of the first glass tube. A discharge space that emits light is formed between the discharge space and the surface. A phosphor film for making ultraviolet light visible is formed on at least the inner wall surface of the second glass tube. Here, while the phosphor film is expected to have an effect of making visible light efficient, the glass tube surface is exposed in a strip shape along the axial direction in order to efficiently emit visible light from the outer periphery of the second glass tube. It is formed leaving a region (where no phosphor film is formed). Note that a phosphor film may be formed on the outer peripheral surface of the first glass tube in order to perform an efficient function of making visible light visible.
【００１７】請求項１〜５の発明において、第２のガラ
ス管内周面に形成された蛍光体膜に対応する外周面領域
に添設された一対の電極層は、いわゆる単純な帯状でも
よいし、たとえば蛇行型に形設・配置してもよい。ここ
で、蛇行型とは、ほぼ一定幅の帯状領域内で、同一周期
もしくは非同一周期の曲成部（折り曲げ）を複数個有す
る形状を意味する。つまり、ガラス管軸方向の発光領域
の長さよりも全長は長いが、前記ガラス管軸方向の発光
領域内に、何らかの曲成部を持たせることにより添設さ
れた形状を示す。In the first to fifth aspects of the present invention, the pair of electrode layers provided on the outer peripheral surface region corresponding to the phosphor film formed on the inner peripheral surface of the second glass tube may have a so-called simple band shape. For example, they may be formed and arranged in a meandering shape. Here, the meandering type means a shape having a plurality of bent portions (bends) having the same period or the same period in a belt-shaped region having a substantially constant width. In other words, the overall length is longer than the length of the light emitting region in the glass tube axial direction, but the shape is added by providing some bent portion in the light emitting region in the glass tube axial direction.
【００１８】請求項１〜５の発明において、放電媒体
は、少なくともXeガスを含む希ガスであり、たとえばXe
ガス、Xe−Ne系ガス、Xe−希ガス類など、Xeガスを少な
くとも含む希ガス混合系が挙げられる。In the first to fifth aspects of the present invention, the discharge medium is a rare gas containing at least Xe gas.
Noble gas mixed systems containing at least Xe gas, such as gas, Xe-Ne based gas, and Xe-rare gases.
【００１９】請求項４および５の発明において、気密封
止型の第１のガラス管内に封装（封有）した吸熱体は、
たとえば水銀やアルコール類など吸熱によって蒸発する
速度が大きい金属類、有機溶媒などが挙げられる。In the invention according to claims 4 and 5, the heat absorber sealed (sealed) in the hermetically sealed first glass tube is:
For example, metals such as mercury and alcohols which evaporate at a high rate due to endotherm, and organic solvents are exemplified.
【００２０】[0020]
【発明の実施の形態】以下、図１ (a)， (b)、図２、図
３ (a)， (b)、および図４を参照して実施例を説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to FIGS. 1 (a) and 1 (b), FIGS. 2, 3 (a) and 3 (b) and FIG.
【００２１】実施例１ 図１ (a)， (b)は、この実施例に係る外面電極ランプの
要部構成を示すもので、 (a)は一部切り欠き横断面図、
(b)は縦断面図である。図１ (a)， (b)において、４は
少なくとも一端が開口した第１のガラス管、５は前記第
１のガラス管４に対し同心円（同軸）的に配置され、第
１のガラス管４外周面との間に気密な空間部６を形成す
るため封止一体化された第２のガラス管である。Embodiment 1 FIGS. 1 (a) and 1 (b) show the configuration of a main part of an external electrode lamp according to this embodiment. FIG.
(b) is a longitudinal sectional view. 1 (a) and 1 (b), reference numeral 4 denotes a first glass tube having at least one open end, and reference numeral 5 denotes a first glass tube which is disposed concentrically (coaxially) with the first glass tube 4. This is a second glass tube that is sealed and integrated to form an airtight space 6 between itself and the outer peripheral surface.
【００２２】ここで、第１のガラス管４は、たとえば内
径 3〜 8mm程度、外径 4〜 9mm程度、長さ 100〜 500mm
程度の両端が開口しており、ガラス管４内を空気などが
流れ、ガラス管４内側から冷却などが行えるようにした
ものである。また、第２のガラス管５は、たとえば内径
6〜14mm程度、外径 7〜15mm程度、長さ 100〜 500mm程
度で両端側が、前記第１のガラス管４の外周部に気密に
溶着・封止され、第１のガラス管４外周面との間に放電
する空間部６を形成している。Here, the first glass tube 4 has, for example, an inner diameter of about 3 to 8 mm, an outer diameter of about 4 to 9 mm, and a length of 100 to 500 mm.
Both ends are open, and air or the like flows in the glass tube 4 so that cooling or the like can be performed from the inside of the glass tube 4. The second glass tube 5 has, for example, an inner diameter.
About 6 to 14 mm, outer diameter of about 7 to 15 mm, length of about 100 to 500 mm, both ends are hermetically welded and sealed to the outer peripheral portion of the first glass tube 4, and the outer peripheral surface of the first glass tube 4 A space portion 6 for discharging is formed.
【００２３】７は前記第２のガラス管５の内壁面に、管
軸方向へ所要の幅を残して形成された蛍光体被膜、8a，
8bは前記蛍光体被膜７に対応する第２のガラス管５外周
面に、帯状に添設された一対の外部電極層であり、ま
た、前記第１のガラス管４外周面および第２のガラス管
５内壁面で形成する気密な空間部６に、少なくともXeガ
スを含む放電媒体、たとえばXeガスを主体とした希ガス
や、水銀−Xe系希ガスが封入されて外面電極ランプを構
成している。Reference numeral 7 denotes a phosphor coating formed on the inner wall surface of the second glass tube 5 while leaving a required width in the tube axis direction.
Reference numeral 8b denotes a pair of external electrode layers attached to the outer peripheral surface of the second glass tube 5 corresponding to the phosphor coating 7 in a strip shape, and the outer peripheral surface of the first glass tube 4 and the second glass layer. A discharge medium containing at least Xe gas, for example, a rare gas mainly containing Xe gas or a mercury-Xe-based rare gas is sealed in an airtight space 6 formed on the inner wall surface of the tube 5 to form an external electrode lamp. I have.
【００２４】ここで、一対の外部電極層8a，8bは、第２
のガラス管５の外周面に、管軸方向ほぼ全長に亘って一
体的に添設された一対の帯状体、たとえば幅 5〜 8mm程
度、厚さ20〜 100μm 程度のアルミニウム箔などの導電
性膜である。そして、外部電極層8a，8bの一体的な添設
は、たとえば接着剤層を介して、ほぼ一定幅で帯状打ち
抜き加工された導電性膜、あるいはほぼ一定のピッチ
で、かつ一定の形状に打ち抜き加工された蛇行型の帯状
導電性膜を接着一体化することにより行われる。Here, the pair of external electrode layers 8a and 8b
A pair of strips integrally attached to the outer peripheral surface of the glass tube 5 over substantially the entire length in the tube axis direction, for example, a conductive film such as an aluminum foil having a width of about 5 to 8 mm and a thickness of about 20 to 100 μm. It is. The external electrode layers 8a and 8b are integrally provided by, for example, punching a conductive film having a substantially constant width in a band shape or a substantially constant pitch and a constant shape via an adhesive layer. This is performed by bonding and integrating the processed meandering belt-shaped conductive film.
【００２５】なお、前記外部電極層8a，8bの一体的に添
設に当たって、外部電極層8a，8bを支持させた透光性樹
脂フィルムを第２のガラス管５外周面に、接着一体化す
る手段を採ることもできる。この場合は、透光性樹脂フ
ィルムが外装ないしガラス管５の保護に寄与する一方、
外部電極層8a，8bにおける沿面放電の防止など絶縁性を
確保する。When the external electrode layers 8a and 8b are integrally attached, a light-transmitting resin film supporting the external electrode layers 8a and 8b is bonded and integrated to the outer peripheral surface of the second glass tube 5. Means can also be taken. In this case, the translucent resin film contributes to the protection of the exterior or the glass tube 5, while
Insulation such as prevention of creeping discharge in the external electrode layers 8a and 8b is ensured.
【００２６】上記構成の実施例に係る外部電極ランプ
は、第１のガラス管４の一端から空気流を送り込み他端
側に流し出しながら、外部電極層8a，8bに電力供給手段
を介して、たとえば20〜 100 KHz， 1〜 2KVの高周波電
圧を印加すると、外部電極層8a，8b間の電圧で、第２の
ガラス管５内で放電が起こって紫外線を放射する。ここ
で、放射された紫外線は、第２のガラス管５内壁面の蛍
光体被膜７によって可視光に変換され、ガラス管５外に
可視光を照射し、光源としての作用を行う。なお、前記
第１のガラス管４における一端からの空気流送り込み
は、自然流入方式でもよいし、強制流入方式でもよく、
また、この冷却媒体は、空気以外の気体、液体であって
もよい。In the external electrode lamp according to the embodiment having the above-described structure, an air flow is sent from one end of the first glass tube 4 and flows out to the other end, and the power is supplied to the external electrode layers 8a and 8b via power supply means. For example, when a high-frequency voltage of 20 to 100 KHz and 1 to 2 KV is applied, a discharge occurs in the second glass tube 5 with the voltage between the external electrode layers 8a and 8b, and ultraviolet rays are emitted. Here, the emitted ultraviolet light is converted into visible light by the phosphor coating 7 on the inner wall surface of the second glass tube 5, irradiates the outside of the glass tube 5 with visible light, and acts as a light source. The air flow from one end of the first glass tube 4 may be a natural inflow method or a forced inflow method.
The cooling medium may be a gas or liquid other than air.
【００２７】図２は、上記点灯開始（高周波電圧の印
加）後の時間（分）と、外部電極ランプの相対光量変化
の関係（曲線Ａ）を示したもので、図５に図示した構成
の従来の外部電極ランプの場合（曲線ａ）に比べて、点
灯開始後の光量低下が少なく、かつ点灯開始後比較的速
やかに安定した発光状態を採ることができる。すなわ
ち、点灯に伴うランプの発熱が、第１のガラス管４を流
れる空気によって冷却され、発光ランプの温度上昇を抑
制・低減てきるため、点灯直後の光量減少も抑制され、
安定した露光用光源として機能する。FIG. 2 shows the relationship (curve A) between the time (minutes) after the start of the lighting (application of the high-frequency voltage) and the change in the relative light amount of the external electrode lamp (curve A). Compared with the conventional external electrode lamp (curve a), the decrease in the amount of light after the start of lighting is small, and a stable light emitting state can be taken relatively quickly after the start of lighting. That is, since the heat generated by the lamp due to lighting is cooled by the air flowing through the first glass tube 4 and the temperature rise of the light emitting lamp is suppressed or reduced, the decrease in the amount of light immediately after lighting is also suppressed,
Functions as a stable exposure light source.
【００２８】上記実施例に係る外部電極ランプにおい
て、放電する空間部６を形成する第１のガラス管４外周
面に蛍光体膜７′を形成した構成とすることもできる。
すなわち、図３ (a)に一部切り欠き横断面的に、また、
図３ (b)に縦断面的にそれぞれ示すように、前記気密な
空間部６を形成する第２のガラス管５内壁面に管軸方向
へ所要の幅を残して蛍光体被膜７を形成具備させるとと
もに、第１のガラス管４の外周面にほぼ全長に亘って、
蛍光体被膜７′を形成した構成としてもよい。そして、
この蛍光体被膜７，７′面の増大で、空間部６で発生さ
せた紫外線を可視光に変換する領域を大きくして、相対
的に光量を増大化させることにより、前記点灯直後の光
量安定化を図る一方、大光量の光源として機能させるこ
とができる。In the external electrode lamp according to the above-described embodiment, it is also possible to adopt a configuration in which a phosphor film 7 'is formed on the outer peripheral surface of the first glass tube 4 forming the space portion 6 for discharging.
In other words, FIG.
As shown in FIG. 3 (b) in longitudinal section, a phosphor coating 7 is formed on the inner wall surface of the second glass tube 5 forming the hermetic space 6 while leaving a required width in the tube axis direction. At the same time, on the outer peripheral surface of the first glass tube 4 over almost the entire length,
A configuration in which the phosphor film 7 'is formed may be employed. And
By increasing the surface of the phosphor coatings 7 and 7 ', the area for converting the ultraviolet light generated in the space 6 into visible light is increased, and the light amount is relatively increased. On the other hand, it can function as a light source of a large light amount.
【００２９】実施例２ 図４は、この実施例に係る外面電極ランプの要部構成を
示す一部切り欠き横断面図である。図４において、４′
は内部に吸熱体（たとえばアルコール）９を気密に封装
（封装）する両端封止型の第１のガラス管、５は前記第
１のガラス管４′に対し同心円（同軸）的に配置され、
第１のガラス管４′外周面との間に気密な空間部６を形
成するため封止一体化された第２のガラス管である。Embodiment 2 FIG. 4 is a partially cutaway cross-sectional view showing the configuration of a main part of an external electrode lamp according to this embodiment. In FIG. 4, 4 '
Is a double-sided sealed first glass tube for hermetically sealing (sealing) a heat absorbing body (for example, alcohol) 9 therein, 5 is arranged concentrically (coaxially) with the first glass tube 4 ′,
The second glass tube is sealed and integrated to form an airtight space 6 between the first glass tube 4 'and the outer peripheral surface.
【００３０】ここで、第１のガラス管４′は、たとえば
内径 3〜 8mm程度、外径 4〜 9mm程度、長さ 100〜 500
mm程度で、かつ両端が気密に封止されており、また、そ
のガラス管４′の封止領域内に封装（封装）された吸熱
体９は、第１のガラス管４′壁を介して放電発光の熱を
吸熱して蒸発し、結果的に、発光空間領域における発熱
の上昇を防止するもので、ガラス管４′内側から冷却な
どが行えるようにしたものである。また、第２のガラス
管５は、たとえば内径 6〜14mm程度、外径 7〜15mm程
度、長さ 100〜 500mm程度で両端側が、前記第１のガラ
ス管４′の外周部に気密に溶着・封止され、第１のガラ
ス管４′外周面との間に放電する空間部６を形成してい
る。Here, the first glass tube 4 'has, for example, an inner diameter of about 3 to 8 mm, an outer diameter of about 4 to 9 mm, and a length of 100 to 500 mm.
mm and both ends are hermetically sealed, and the heat absorber 9 sealed (sealed) in the sealing region of the glass tube 4 'is interposed through the wall of the first glass tube 4'. It absorbs the heat of the discharge light emission and evaporates, and as a result, prevents an increase in heat generation in the light emitting space region, and enables cooling or the like from the inside of the glass tube 4 '. The second glass tube 5 has an inner diameter of about 6 to 14 mm, an outer diameter of about 7 to 15 mm, a length of about 100 to 500 mm, and has both ends hermetically welded to the outer periphery of the first glass tube 4 '. A sealed space 6 is formed between the first glass tube 4 'and the outer peripheral surface of the first glass tube 4'.
【００３１】７は前記第２のガラス管５の内壁面に、管
軸方向へ所要の幅を残して形成された蛍光体被膜、8a，
8bは前記蛍光体被膜７に対応する第２のガラス管５外周
面に、帯状に添設された一対の外部電極層である。そし
て、前記第１のガラス管４′外周面および第２のガラス
管５内壁面で形成する気密な空間部６に、少なくともXe
ガスを含む放電媒体、たとえばXeガスを主体とした希ガ
スや、水銀−Xe系希ガスが封入されて外面電極ランプを
構成している。Reference numeral 7 denotes a phosphor coating formed on the inner wall surface of the second glass tube 5 while leaving a required width in the tube axis direction.
Reference numeral 8b denotes a pair of external electrode layers provided in a strip shape on the outer peripheral surface of the second glass tube 5 corresponding to the phosphor film 7. At least Xe is provided in an airtight space 6 formed by the outer peripheral surface of the first glass tube 4 ′ and the inner wall surface of the second glass tube 5.
A discharge medium containing gas, for example, a rare gas mainly composed of Xe gas or a mercury-Xe-based rare gas is sealed to constitute an external electrode lamp.
【００３２】つまり、第１のガラス管４′を冷却源とし
て機能させるか、第１のガラス管４′を冷媒流路として
機能させるかの点を除いて、基本的に、同様の構成を採
っている。したがって、この実施例に係る外部電極ラン
プの場合も、前記気密な空間部６を形成する第２のガラ
ス管５内壁面に管軸方向へ所要の幅を残して蛍光体被膜
７を形成具備させるとともに、第１のガラス管４′の外
周面にほぼ全長に亘って、蛍光体被膜７′を形成した構
成とすることができる。そして、この蛍光体被膜７，
７′面の増大で、空間部６で発生させた紫外線を可視光
に変換する領域を大きくして、相対的に光量を増大化さ
せることにより、点灯直後の光量安定化を図る一方、大
光量の光源として機能させることができる。That is, basically the same configuration is adopted except that the first glass tube 4 'functions as a cooling source or the first glass tube 4' functions as a coolant flow path. ing. Therefore, also in the case of the external electrode lamp according to this embodiment, the phosphor coating 7 is formed on the inner wall surface of the second glass tube 5 forming the hermetic space 6 while leaving a required width in the tube axis direction. At the same time, it is possible to adopt a configuration in which the phosphor coating 7 ′ is formed on almost the entire outer peripheral surface of the first glass tube 4 ′. And this phosphor coating 7,
By increasing the area of the 7 'surface, the area for converting ultraviolet light generated in the space 6 into visible light is enlarged, and the light amount is relatively increased, thereby stabilizing the light amount immediately after lighting, while increasing the light amount. Can function as a light source.
【００３３】本発明は、上記実施例に限定されるもので
なく、発明の趣旨を逸脱しない範囲でいろいろの変形を
採ることができる。たとえばガラス管の外径、長さ、外
部電極層の材質や形状（平行型、蛇行型）、あるいは透
光性樹脂フィルムの被覆の有無など、外部電極ランプの
用途ないし使用状態に対応して適宜変更できる。The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the outer diameter and length of the glass tube, the material and shape of the external electrode layer (parallel type, meandering type), the presence or absence of the coating with the transparent resin film, etc. Can be changed.
【００３４】[0034]
【発明の効果】上記説明から分かるように、本発明に係
る外部電極ランプによれば、放電・発光領域を形成する
第２のガラス管内に、同軸的ないし同心円的に配置・一
体化させた第１のガラス管が冷却・放熱部として作用
し、放電・発光領域の温度上昇を容易に防止する。つま
り、点灯開始に伴う放電・発光領域の発熱が容易に放熱
され、点灯開始から短時間内に光量が安定化するだけで
なく、比較的高い相対光量を維持する。この放電・発光
領域における温度上昇に起因する光量低下が容易に防止
・抑制され、比較的高く、かつ安定した相対光量を維持
することは、露光用光源、あるいは液晶表示装置類のバ
ックライトなど、大光量化、高効率化の要求に耐える光
源の提供となる。As can be understood from the above description, according to the external electrode lamp according to the present invention, the second electrode tube, which is coaxially or concentrically arranged and integrated in the second glass tube forming the discharge / light emission region. The glass tube 1 acts as a cooling / radiating portion, and easily prevents a temperature rise in the discharge / light emitting region. In other words, the heat generation in the discharge / light emission region accompanying the start of lighting is easily radiated, and the light amount is stabilized in a short time after the start of lighting, and a relatively high relative light amount is maintained. A decrease in the amount of light due to a rise in temperature in the discharge / light emission region is easily prevented or suppressed, and a relatively high and stable relative amount of light is maintained, such as a light source for exposure or a backlight of a liquid crystal display device. This provides a light source that can withstand the demand for higher light intensity and higher efficiency.
【図１】第１の実施例に係る外部電極ランプの要部構成
を示すもので、 (a)は一部切り欠き横断面図、 (b)は縦
断面図。FIG. 1 shows a configuration of a main part of an external electrode lamp according to a first embodiment, wherein (a) is a partially cutaway cross-sectional view, and (b) is a longitudinal cross-sectional view.
【図２】第１の実施例に係る外部電極ランプおよび従来
の外部電極ランプについて、点灯開始空の時間と相対光
量の関係例を示す特性図。FIG. 2 is a characteristic diagram showing an example of the relationship between the lighting start sky time and the relative light amount for the external electrode lamp according to the first embodiment and the conventional external electrode lamp.
【図３】第１の実施例に係る他の外部電極ランプの要部
構成を示すもので、 (a)は一部切り欠き横断面図、 (b)
は縦断面図。3A and 3B show a main part configuration of another external electrode lamp according to the first embodiment, wherein FIG. 3A is a partially cutaway cross-sectional view, and FIG.
Is a longitudinal sectional view.
【図４】第２の実施例に係る外部電極ランプの要部構成
を示す一部切り欠き横断面図。FIG. 4 is a partially cutaway cross-sectional view showing a main part configuration of an external electrode lamp according to a second embodiment.
【図５】従来の外部電極ランプの要部構成を示すもの
で、 (a)は一部切り欠き横断面図、 (b)は縦断面図。5A and 5B show a configuration of a main part of a conventional external electrode lamp, wherein FIG. 5A is a partially cutaway cross-sectional view, and FIG.
４，４′……第１のガラス管 ５，……第２のガラス管 ６……空間部（放電空間領域） ７，７′……蛍光体被膜 8a，8b……外部電極層 ９……吸熱体 4, 4 'first glass tube 5, second glass tube 6, space (discharge space region) 7, 7' phosphor coating 8a, 8b external electrode layer 9 Endothermic body
Claims (5)
管と、 前記第１のガラス管に対し同心円的に配置され、第１の
ガラス管外周面との間に気密な空間部を形成するため封
止一体化された第２のガラス管と、 前記第２のガラス管の内壁面に管軸方向へ所要の幅を残
して形成された蛍光体被膜と、 前記蛍光体被膜に対応する第２のガラス管外周面に対向
的に添設された一対の外部電極層と、 前記第１のガラス管外周面および第２のガラス管内壁面
で形成する気密な空間部に封入された少なくともXeガス
を含む放電媒体と、を有することを特徴とする外面電極
ランプ。An airtight space is formed between a first glass tube having at least one open end and an outer peripheral surface of the first glass tube which is arranged concentrically with respect to the first glass tube. A second glass tube that is sealed and integrated, a phosphor coating formed on the inner wall surface of the second glass tube while leaving a required width in the tube axis direction, and a second corresponding to the phosphor coating A pair of external electrode layers provided opposite to the outer peripheral surface of the glass tube, and at least Xe gas sealed in an airtight space formed by the outer peripheral surface of the first glass tube and the inner wall surface of the second glass tube. And a discharge medium containing the same.
媒体が封入された空間部の発熱を放熱させることを特徴
とする請求項１記載の外面電極ランプ。2. The external electrode lamp according to claim 1, wherein the inside of the first glass tube forms a ventilation path, and radiates heat generated in the space in which the discharge medium is sealed.
外周面に蛍光体被膜が形成されていることを特徴とする
請求項１もしくは請求項２記載の外面電極ランプ。3. The external electrode lamp according to claim 1, wherein a phosphor coating is formed on an outer peripheral surface of the first glass tube forming an airtight space.
ラス管と、 前記第１のガラス管に対し同心円的に配置され、第１の
ガラス管外周面との間に気密な空間部を形成するため封
止一体化された第２のガラス管と、 前記第２のガラス管内壁面に管軸方向の所要幅を残して
形成された蛍光体被膜と、 前記蛍光体被膜に対応する第２のガラス管外周面に対向
的に添設された一対の外部電極層と、 前記第１のガラス管外周面および第２のガラス管内壁面
で形成する空間部に封入された少なくともXeガスを含む
放電媒体と、を有することを特徴とする外面電極ラン
プ。4. An airtight space between an airtightly sealed first glass tube enclosing a heat absorber and an outer peripheral surface of the first glass tube which is arranged concentrically with respect to the first glass tube. A second glass tube sealed and integrated to form a portion, a phosphor coating formed on the inner wall surface of the second glass tube leaving a required width in the tube axis direction, and a phosphor coating corresponding to the second coating. A pair of external electrode layers opposed to the outer peripheral surface of the second glass tube, and at least Xe gas sealed in a space formed by the outer peripheral surface of the first glass tube and the inner wall surface of the second glass tube. And a discharge medium containing the same.
外周面に蛍光体被膜が形成されていることを特徴とする
請求項４記載の外面電極ランプ。5. The external electrode lamp according to claim 4, wherein a phosphor coating is formed on an outer peripheral surface of the first glass tube forming an airtight space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10347166A JP2000173550A (en) | 1998-12-07 | 1998-12-07 | Outer surface electrode lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10347166A JP2000173550A (en) | 1998-12-07 | 1998-12-07 | Outer surface electrode lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000173550A true JP2000173550A (en) | 2000-06-23 |
Family
ID=18388369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10347166A Withdrawn JP2000173550A (en) | 1998-12-07 | 1998-12-07 | Outer surface electrode lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000173550A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017188264A (en) * | 2016-04-04 | 2017-10-12 | ウシオ電機株式会社 | Excimer lamp for liquid processing |
-
1998
- 1998-12-07 JP JP10347166A patent/JP2000173550A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017188264A (en) * | 2016-04-04 | 2017-10-12 | ウシオ電機株式会社 | Excimer lamp for liquid processing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20060207 |