JPH09199084A - Cold cathode low pressure discharge lamp - Google Patents
Cold cathode low pressure discharge lampInfo
- Publication number
- JPH09199084A JPH09199084A JP473696A JP473696A JPH09199084A JP H09199084 A JPH09199084 A JP H09199084A JP 473696 A JP473696 A JP 473696A JP 473696 A JP473696 A JP 473696A JP H09199084 A JPH09199084 A JP H09199084A
- Authority
- JP
- Japan
- Prior art keywords
- cold cathode
- visible light
- discharge lamp
- pressure discharge
- phosphor layer
- 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.)
- Granted
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000011521 glass Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010408 film Substances 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000005284 excitation Effects 0.000 description 5
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical group [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011787 zinc oxide Substances 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】本発明は冷陰極低圧放電灯に
係り、さらに詳しくは小形，軽量で、輝度の向上を図っ
た冷陰極低圧放電灯に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold cathode low pressure discharge lamp, and more particularly to a cold cathode low pressure discharge lamp which is small in size and light in weight and has improved brightness.
【０００２】[0002]
【従来の技術】液晶表示装置は、ワードプロセッサー，
パーソナルコンピューター，液晶テレビなどの表示部と
して広く実用化されており、用途もさらに広がる傾向に
ある。そして、液晶表示装置は、多種多様な用途に対応
できる構造，機能を要求される傾向にあり、液晶バック
ライト用光源においても、小形，軽量で、より高輝度化
などが望まれる。2. Description of the Related Art A liquid crystal display device is a word processor,
It has been widely put to practical use as a display unit for personal computers, LCD TVs, etc., and its use tends to expand. Further, the liquid crystal display device tends to be required to have a structure and functions capable of being used for various purposes, and a light source for a liquid crystal backlight is also required to be small in size, light in weight, and have higher brightness.
【０００３】ところで、液晶バックライト用光源として
は、一般的に、冷陰極蛍光ランプ（冷陰極低圧放電灯）
が使用されており、このような用途に対して、図２に要
部構成を断面的に示すような冷陰極蛍光ランプが提供さ
れている。すなわち、内壁面に、紫外線による刺激で発
光する蛍光体層１が設けられ、かつ希ガスを封有するガ
ラス管（ガラスバルブ）２と、このガラス管２の両端部
にそれぞれ封装された一対の冷陰極３，３′と、この一
対の冷陰極３，３′に一端が接続し、他端側がガラス管
２から封止導出された導入線４，４′とで構成されてい
る。なお、要すれば、前記ガラス管２の内壁面と蛍光体
層１との間に紫外線反射層を介挿することもある。By the way, as a light source for a liquid crystal backlight, a cold cathode fluorescent lamp (cold cathode low pressure discharge lamp) is generally used.
For such an application, a cold cathode fluorescent lamp having a cross-sectional view of a main part configuration shown in FIG. 2 is provided. That is, a glass tube (glass bulb) 2 provided with a phosphor layer 1 that emits light upon stimulation with ultraviolet rays on an inner wall surface and sealing a rare gas, and a pair of cold tubes respectively sealed at both ends of the glass tube 2. The cathodes 3 and 3'and one pair of cold cathodes 3 and 3'are connected to each other at one end, and the other ends are provided with lead-in wires 4 and 4'which are sealed and led out from the glass tube 2. If necessary, an ultraviolet reflection layer may be inserted between the inner wall surface of the glass tube 2 and the phosphor layer 1.
【０００４】この種の冷陰極蛍光ランプは、導入線４，
４′を介して各冷陰極３，３′に通電することによって
発生した初期プラズマ中のイオンにより、各冷陰極３，
３′から二次電子が放出され、ガラス管２内で放電が開
始する。そして、この放電開始に伴う放電エネルギーで
励起された水銀原子の共鳴遷移によって紫外線が放射さ
れ、この紫外線がガラス管２内壁面の蛍光体層１によっ
て可視光に変換され，可視光を発光する放電灯として機
能している。また、紫外線反射層を介挿した場合は、蛍
光体層１による可視光変換に当たり、蛍光体層１を透過
した紫外線が紫外線反射層で反射され、再び蛍光体層１
に戻されて可視光に変換されるので、紫外線の利用効率
が高まり、結果的に発光効率を高めることができる。This type of cold cathode fluorescent lamp has a lead-in wire 4,
Ions in the initial plasma generated by energizing each cold cathode 3, 3'through 4 '
Secondary electrons are emitted from 3 ', and electric discharge starts in the glass tube 2. Ultraviolet rays are radiated by the resonance transition of the mercury atoms excited by the discharge energy accompanying the start of the discharge, and the ultraviolet rays are converted into visible light by the phosphor layer 1 on the inner wall surface of the glass tube 2 to emit visible light. It works as a light. Further, when the ultraviolet reflection layer is interposed, the ultraviolet rays transmitted through the phosphor layer 1 are reflected by the ultraviolet reflection layer upon conversion of visible light by the phosphor layer 1, and the phosphor layer 1 is again formed.
Since it is converted into visible light and converted into visible light, the utilization efficiency of ultraviolet rays is increased, and as a result, the luminous efficiency can be increased.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、液晶バ
ックライト用光源としての冷陰極蛍光ランプに関して
は、上記のように、市場の動向として、バックライトユ
ニットの薄型，軽量，高輝度，長寿命化が重要視され、
このような動向に伴い、組み込む光源（ランプ）につい
ても、より一層の軽量化，小形化，高輝度化が望まれて
いる。しかしながら、前記のごとく、ガラスバルブ２内
壁面と蛍光体層１との間に、紫外線反射層を介挿させた
場合でも、高輝度化という点ではなお問題がある。すな
わち、冷陰極蛍光ランプが発光する光の進路は２方向に
大別でき、ガラス管２壁側に向かう光はそのまま光照し
て利用されるが、ガラス管２の中心軸方向に向かう光は
封入ガスなどによる吸収で損失し、結果的に蛍光体層で
発光する可視光が十分有効に活用されないので、所望の
高輝度が得られないという問題がある。However, regarding the cold cathode fluorescent lamp as the light source for the liquid crystal backlight, as described above, the trend of the market is that the backlight unit is thin, lightweight, high in brightness and long in life. Important
Along with such a trend, further reduction in weight, size, and brightness of the light source (lamp) to be incorporated are desired. However, as described above, even when the ultraviolet reflective layer is interposed between the inner wall surface of the glass bulb 2 and the phosphor layer 1, there is still a problem in terms of high brightness. That is, the paths of the light emitted by the cold cathode fluorescent lamp can be roughly divided into two directions, and the light directed to the wall side of the glass tube 2 is used as it is, but the light directed toward the central axis of the glass tube 2 is enclosed. There is a problem that the desired high brightness cannot be obtained because visible light emitted from the phosphor layer is lost due to absorption by gas or the like, and as a result, the visible light emitted from the phosphor layer is not effectively utilized.
【０００６】本発明は上記事情に対処してなされたもの
で、バックライトユニットの薄型，軽量化などが可能
な、小形，軽量で輝度の高い冷陰極低圧放電灯の提供を
目的とする。The present invention has been made in consideration of the above circumstances, and an object thereof is to provide a cold cathode low-pressure discharge lamp of small size, light weight, and high brightness, which enables a backlight unit to be thin and lightweight.
【０００７】[0007]
【課題を解決するための手段】請求項１の発明は、内壁
面に蛍光体層が設けられ、かつ希ガスを封有するガラス
管、および前記ガラス管の両端部にそれぞれ封装された
一対の冷陰極を有する冷陰極低圧放電灯であって、前記
蛍光体層の内壁面に紫外線透過性で、かつ可視光を反射
する可視光反射膜を形成配置したことを特徴とする冷陰
極低圧放電灯である。According to a first aspect of the present invention, there is provided a glass tube provided with a phosphor layer on an inner wall surface thereof and sealing a rare gas, and a pair of cold tubes respectively sealed at both ends of the glass tube. A cold cathode low-pressure discharge lamp having a cathode, characterized in that the inner wall surface of the phosphor layer is transparent to ultraviolet light, and a visible light reflection film for reflecting visible light is formed and arranged. is there.
【０００８】すなわち、本発明に係る冷陰極低圧放電灯
は、発光ガラス管の内壁面に配設した蛍光体層上に、紫
外線透過性の可視光反射層（薄膜）を形成したものであ
る。そして、このような構成を採ったことにより、放電
エネルギーで励起された放電媒体が放射する紫外線を蛍
光体層が吸収し、この紫外線吸収に伴う励起によって発
光する可視光が、発光ガラス管内の封入ガスによって吸
収されるのを回避・低減して、発光する可視光の利用効
率をさらに高めることを骨子としている。That is, the cold cathode low-pressure discharge lamp according to the present invention has a visible light reflecting layer (thin film) transparent to ultraviolet rays formed on the phosphor layer provided on the inner wall surface of the light emitting glass tube. By adopting such a configuration, the phosphor layer absorbs the ultraviolet rays emitted by the discharge medium excited by the discharge energy, and the visible light emitted by the excitation accompanying the absorption of the ultraviolet rays is sealed in the light-emitting glass tube. The essence is to avoid or reduce absorption by gas and further improve the utilization efficiency of visible light emitted.
【０００９】本発明において、蛍光体層の内壁面（放電
路面側）に、積層的に配設する紫外線透過性で、かつ可
視光反射膜は、たとえばアルミナ，シリカ，酸化亜鉛な
どを素材として薄膜に形成されたものであり、また、前
記可視光反射膜の形成は、前記素材の微粒子分散液、も
しく金属塩や有機金属化合物の溶液を、形成されている
蛍光体層面に塗布・焼成すればよく、このときの膜厚
は、一般的に 100〜 200nm程度でよい。In the present invention, an ultraviolet-transparent and visible-light-reflecting film laminated on the inner wall surface (discharge path surface side) of the phosphor layer is a thin film made of, for example, alumina, silica, zinc oxide or the like. The visible light reflection film is formed by coating and baking a fine particle dispersion of the material, or a solution of a metal salt or an organometallic compound on the surface of the formed phosphor layer. The film thickness at this time is generally about 100 to 200 nm.
【００１０】本発明においては、要すれば発光ガラス管
の内壁面に、可視光透過性で、かつ紫外線を反射する紫
外線反射層を介して蛍光体層を設けた構造とすることも
できる。すなわち、前記蛍光体層内壁面に可視光反射膜
を配設する構造において、蛍光体層の下地層として、可
視光を透過しながら紫外線を反射する紫外線反射層を介
挿すると、紫外線による蛍光体層における可視光の発光
効率も向上する。ここで、放電媒体の励起によって放射
される波長λの紫外線の反射率を高めるためには、多層
型の紫外線反射層が望ましい。すなわち、屈折率の高い
物質層および屈折率の低い物質層の各層ごとの厚さをλ
／4nに設定して積層型化することが望ましい（ nは各物
質の屈折率である）。In the present invention, if necessary, a fluorescent material layer may be provided on the inner wall surface of the light emitting glass tube via an ultraviolet ray reflective layer which is transparent to visible light and reflects ultraviolet rays. That is, in the structure in which the visible light reflection film is provided on the inner wall surface of the phosphor layer, when an ultraviolet reflection layer that reflects ultraviolet light while transmitting visible light is interposed as an underlayer of the phosphor layer, the phosphor by ultraviolet light is inserted. The luminous efficiency of visible light in the layer is also improved. Here, in order to increase the reflectance of the ultraviolet rays having the wavelength λ radiated by the excitation of the discharge medium, a multilayer ultraviolet reflection layer is desirable. That is, the thickness of each of the high refractive index material layer and the low refractive index material layer is λ
It is desirable to set / 4n to form a laminated type (n is the refractive index of each substance).
【００１１】このように、紫外線反射層を併設した場合
は、冷陰極低圧放電灯の発光の高効率化などが助長され
る。つまり、蛍光体層中の蛍光体を励起し、所要の可視
光に変換される紫外線が反射層で反射されて、再び蛍光
体の励起に寄与するのでより効率的な可視光変換が図ら
れ、発光効率の大幅な向上となる。As described above, when the ultraviolet reflecting layer is provided together, the efficiency of light emission of the cold cathode low pressure discharge lamp is promoted. That is, the phosphor in the phosphor layer is excited, and the ultraviolet rays that are converted into the required visible light are reflected by the reflective layer, and contribute to the excitation of the phosphor again, so that more efficient visible light conversion is achieved. The luminous efficiency is significantly improved.
【００１２】上記のような構成を採ることによって、発
光輝度の向上や発光効率の向上が図られるので、同等の
発光強度，輝度を期待する場合、冷陰極低圧放電灯の小
形，軽量化が図られることにもなる。つまり、可視光反
射による蛍光体が発光する可視光の効率的な利用（可視
光の吸収・損失回避）、すぐれた耐用性などによって、
発光の高効率化や小形軽量化など図られた冷陰極低圧放
電灯が提供される。By adopting the above-mentioned structure, the emission brightness and the emission efficiency can be improved. Therefore, when the same emission intensity and brightness are expected, the cold cathode low pressure discharge lamp can be made small and lightweight. It will be done. In other words, the efficient use of visible light emitted by the phosphor due to visible light reflection (absorption and loss avoidance of visible light), excellent durability, etc.
Provided is a cold cathode low-pressure discharge lamp which has a high efficiency of light emission, a small size and a light weight.
【００１３】[0013]
【発明の実施の形態】次に図１を参照して実施例を説明
する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment will be described with reference to FIG.
【００１４】図１は冷陰極低圧放電灯の要部構成例を断
面的に示したものである。図１において、５は紫外線に
よる刺激で発光する蛍光体層６が内壁面に設けられ、か
つ放電媒体、たとえば希ガスや水銀を封有する外径 3.0
mm，内径 2.0mmのガラス管、７は前記蛍光体層６面に一
体的てきに設けられた紫外線透過性で、かつ可視光を反
射する反射膜、８，８′は前記ガラス管５の両端部にそ
れぞれ封入された一対の冷陰極、９，９′は前記冷陰極
８，８′に一端が接続し、他端側がガラス管５から封止
導出された導入線である。ここで、可視光反射膜７は、
たとえばエチルシリケートのエチルアルコール系溶液を
蛍光体層６面に塗布，自然乾燥し、かつ塗布，自然乾燥
後、その都度、 600℃程度の温度で15分間程度焼成する
ことにより形成されたものである。FIG. 1 is a sectional view showing an example of the essential structure of a cold cathode low pressure discharge lamp. In FIG. 1, numeral 5 indicates an outer diameter of 3.0, which is provided with a phosphor layer 6 which emits light upon stimulation by ultraviolet rays on the inner wall surface and which contains a discharge medium such as a rare gas or mercury.
mm, glass tube having an inner diameter of 2.0 mm, 7 is a reflecting film integrally provided on the surface of the phosphor layer 6 that is transparent to ultraviolet rays and reflects visible light, and 8 and 8'are both ends of the glass tube 5. A pair of cold cathodes, 9 and 9 ', respectively enclosed in the parts, are lead wires connected at one end to the cold cathodes 8 and 8'and sealed at the other end from the glass tube 5. Here, the visible light reflection film 7 is
For example, it is formed by applying an ethyl alcohol-based solution of ethyl silicate to the surface of the phosphor layer 6 and allowing it to dry naturally, and then, after applying and drying, baking at a temperature of about 600 ° C. for about 15 minutes each time. .
【００１５】上記冷陰極蛍光ランプは、導入線９，９′
を介して各冷陰極８，８′に通電すると、この通電で発
生した初期プラズマ中のイオンによって、各冷陰極８，
８′から二次電子を放出し、ガラス管５内で放電を開始
する。そして、この放電開始に伴う放電エネルギーは、
放電媒体（封入ガス）であるたとえば水銀原子の共鳴励
起によって紫外線を放射する。そして、この放射された
紫外線をガラス管５内壁面の蛍光体層６が吸収，励起し
て、可視光に変換して発光に寄与する。そして、蛍光ラ
ンプ（ガラス管５）の管璧側に放射された可視光は、管
璧を透過して蛍光ランプ外に放射される。The cold cathode fluorescent lamp described above has lead-in wires 9, 9 '.
When the cold cathodes 8 and 8'are energized via the, the cold cathodes 8 and 8'are generated by the ions in the initial plasma generated by this energization.
Secondary electrons are emitted from 8'and discharge is started in the glass tube 5. And the discharge energy accompanying this discharge start is
Ultraviolet rays are emitted by resonant excitation of a discharge medium (filled gas) such as mercury atoms. Then, the radiated ultraviolet rays are absorbed and excited by the phosphor layer 6 on the inner wall surface of the glass tube 5, converted into visible light, and contribute to light emission. Then, the visible light emitted to the tube wall side of the fluorescent lamp (glass tube 5) passes through the tube wall and is emitted to the outside of the fluorescent lamp.
【００１６】一方、蛍光ランプ（ガラス管５）の軸方向
に放射される可視光は、蛍光体層６面に積層敵に配置さ
れている可視光反射膜７によって、管璧側に反射されて
管璧を透過して蛍光ランプ外に放射される。つまり、可
視光反射膜７は、蛍光体層６の紫外線吸収，励起に支障
を与えず良好な可視光変換性を呈する一方、放電媒体に
よる変換可視光の吸収などを抑制，防止して、蛍光ラン
プ外への可視光放射を助長するので小形，軽量でありな
がら、発光輝度（発光強度）の高い冷陰極放電灯として
機能する。On the other hand, the visible light radiated in the axial direction of the fluorescent lamp (glass tube 5) is reflected toward the tube wall side by the visible light reflecting film 7 disposed on the surface of the phosphor layer 6 as an enemy. It passes through the tube wall and is emitted to the outside of the fluorescent lamp. That is, the visible light reflection film 7 exhibits good visible light conversion properties without disturbing the ultraviolet absorption and excitation of the phosphor layer 6, while suppressing or preventing the absorption of the converted visible light by the discharge medium, and Since it promotes the emission of visible light to the outside of the lamp, it functions as a cold cathode discharge lamp with high emission brightness (emission intensity) while being small and lightweight.
【００１７】上記冷陰極低圧放電灯について、常温状態
下，ランプ電流 5mAでそれぞれ点灯試験を行ったとこ
ろ、陰極降下電圧も 100 V r・ m・ s程度であり、輝
度，効率とも、従来の同等規格の冷陰極低圧放電灯に比
べて 5％程度向上していた。The above cold cathode low-pressure discharge lamp was subjected to a lighting test at room temperature under a lamp current of 5 mA. It was improved by about 5% compared to the standard cold cathode low-pressure discharge lamp.
【００１８】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、冷陰極の構成，蛍光体層中
の蛍光体なども特に限定されるものではない。The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the invention. For example, the configuration of the cold cathode and the phosphor in the phosphor layer are not particularly limited.
【００１９】[0019]
【発明の効果】本発明に係る冷陰極低圧放電灯によれ
ば、紫外線の吸収，変換によって発光する可視光の利用
効率が向上するため、冷陰極低圧放電灯の発光の高輝度
化が容易に図られるし、また、コンパクト化なども達成
できる。すなわち、陽光柱中領域に放射され、かつこの
領域での吸収，損失などにより発光に寄与しない可視光
が、可視光反射膜によって大幅に抑制，防止もしくは低
減されるため、蛍光体層で発光した可視光の利用効率が
高まることになり、冷陰極低圧放電灯の輝度が大幅に向
上する。According to the cold cathode low-pressure discharge lamp of the present invention, utilization efficiency of visible light emitted by absorption and conversion of ultraviolet rays is improved, so that the cold cathode low-pressure discharge lamp can easily achieve high luminance. Moreover, it is possible to achieve compactness. That is, visible light that is radiated to the central region of the positive column and does not contribute to light emission due to absorption and loss in this region is significantly suppressed, prevented, or reduced by the visible light reflection film, and thus emitted in the phosphor layer. The utilization efficiency of visible light is increased, and the brightness of the cold cathode low pressure discharge lamp is significantly improved.
【００２０】この発光輝度の大幅な向上は、一方では冷
陰極低圧放電灯の消費電力の低減化や冷陰極低圧放電灯
の小形，軽量化を可能とするので、たとえば小形で高品
位な液晶表示装置の実現にも寄与する。On the other hand, the significant improvement of the emission brightness enables reduction of power consumption of the cold cathode low pressure discharge lamp and reduction in size and weight of the cold cathode low pressure discharge lamp. It also contributes to the realization of the device.
【図１】本発明に係る冷陰極低圧放電灯の要部構成例を
示す断面図。FIG. 1 is a cross-sectional view showing a configuration example of a main part of a cold cathode low pressure discharge lamp according to the present invention.
【図２】従来の冷陰極低圧放電灯の要部構成を示す断面
図。FIG. 2 is a cross-sectional view showing the configuration of a main part of a conventional cold cathode low pressure discharge lamp.
１，６……蛍光体層 ２，５……ガラス管 ３，３′，８，８′……冷陰極 ４，４′，９，９′……導入線 ７……紫外線透過性の可視光反射膜 1, 6 ... Phosphor layer 2, 5 ... Glass tube 3, 3 ', 8, 8' ... Cold cathode 4, 4 ', 9, 9' ... Introductory line 7 ... UV-visible visible light Reflective film
Claims (1)
スを封有するガラス管、および前記ガラス管の両端部に
それぞれ封装された一対の冷陰極を有する冷陰極低圧放
電灯であって、 前記蛍光体層の内壁面に紫外線透過性で、かつ可視光を
反射する可視光反射膜を形成配置したことを特徴とする
冷陰極低圧放電灯。1. A cold cathode low-pressure discharge lamp comprising a glass tube having a phosphor layer provided on an inner wall surface thereof and sealing a rare gas, and a pair of cold cathodes respectively sealed at both ends of the glass tube. A cold cathode low-pressure discharge lamp characterized in that a visible light reflecting film, which is transparent to ultraviolet light and reflects visible light, is formed and arranged on an inner wall surface of the phosphor layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00473696A JP3667414B2 (en) | 1996-01-16 | 1996-01-16 | Cold cathode low pressure discharge lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00473696A JP3667414B2 (en) | 1996-01-16 | 1996-01-16 | Cold cathode low pressure discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09199084A true JPH09199084A (en) | 1997-07-31 |
| JP3667414B2 JP3667414B2 (en) | 2005-07-06 |
Family
ID=11592203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00473696A Expired - Fee Related JP3667414B2 (en) | 1996-01-16 | 1996-01-16 | Cold cathode low pressure discharge lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3667414B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002067289A1 (en) * | 2001-02-19 | 2002-08-29 | West Electric Co., Ltd. | Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube, and camera |
| JP2002528890A (en) * | 1998-10-21 | 2002-09-03 | サーノフ コーポレイション | Wavelength conversion performing device using phosphor having light emitting diode |
| KR100462297B1 (en) * | 2000-05-31 | 2004-12-17 | 레디언트 옵토-일렉트로닉스 코포레이션 | Cold Cathode Tube |
| JP2010192400A (en) * | 2009-02-20 | 2010-09-02 | Panasonic Electric Works Co Ltd | Electrodeless discharge lamp and luminaire |
-
1996
- 1996-01-16 JP JP00473696A patent/JP3667414B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002528890A (en) * | 1998-10-21 | 2002-09-03 | サーノフ コーポレイション | Wavelength conversion performing device using phosphor having light emitting diode |
| KR100462297B1 (en) * | 2000-05-31 | 2004-12-17 | 레디언트 옵토-일렉트로닉스 코포레이션 | Cold Cathode Tube |
| WO2002067289A1 (en) * | 2001-02-19 | 2002-08-29 | West Electric Co., Ltd. | Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube, and camera |
| US6810208B2 (en) | 2001-02-19 | 2004-10-26 | West Electric Co., Ltd. | Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube and camera |
| KR100558939B1 (en) * | 2001-02-19 | 2006-03-10 | 웨스트 덴키 가부시키가이샤 | Electric discharge tube, method of manufacturing the tube, stroboscopic device using the tube, and camera |
| CN100401456C (en) * | 2001-02-19 | 2008-07-09 | 松下照相·照明株式会社 | Electric discharge tube, stroboscopic device using the tube, and camera |
| JP2010192400A (en) * | 2009-02-20 | 2010-09-02 | Panasonic Electric Works Co Ltd | Electrodeless discharge lamp and luminaire |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3667414B2 (en) | 2005-07-06 |
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