JP2000123789A - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JP2000123789A JP2000123789A JP10289463A JP28946398A JP2000123789A JP 2000123789 A JP2000123789 A JP 2000123789A JP 10289463 A JP10289463 A JP 10289463A JP 28946398 A JP28946398 A JP 28946398A JP 2000123789 A JP2000123789 A JP 2000123789A
- Authority
- JP
- Japan
- Prior art keywords
- light
- fluorescent lamp
- visible light
- glass tube
- reflecting film
- 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- Withdrawn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
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims abstract description 47
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000011521 glass Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 5
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052753 mercury Inorganic materials 0.000 claims description 4
- 229910052724 xenon Inorganic materials 0.000 claims description 4
- 239000010408 film Substances 0.000 description 49
- 239000004973 liquid crystal related substance Substances 0.000 description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000005284 excitation Effects 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- MCPKSFINULVDNX-UHFFFAOYSA-N drometrizole Chemical compound CC1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 MCPKSFINULVDNX-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- 238000001579 optical reflectometry Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 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
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 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】本発明は蛍光ランプに係り、
さらに詳しくは高輝度化を図ったアパーチャー型の蛍光
ランプに関する。The present invention relates to a fluorescent lamp,
More specifically, the present invention relates to an aperture-type fluorescent lamp that achieves high luminance.
【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 used as a display unit for personal computers, liquid crystal televisions, and the like. The liquid crystal display devices tend to be required to have a structure and functions capable of responding to a variety of uses, and a light source for a liquid crystal backlight is desired to be small, light, and have higher brightness.
【０００３】この高輝度化に対応した液晶バックライト
用光源として、一定の領域を光放射部とした反射効率を
向上させたアパーチャー型の蛍光ランプ（低圧放電灯）
が開発され、その実用化が図られている（特開平 9-922
27号公報）（特開平 10-106502号公報）。図４(a) ，
(b) ，(c) ，(d) は、従来知られている構成の異なる可
視光反射型蛍光ランプの要部構成を示す横断面図および
縦断面図である。すなわち、発光管内に放電を発生させ
る手段が異なる蛍光ランプであり、a)両内部電極方式、
b)片側外部電極方式、c)両外部電極方式、d)平面型の各
構成を横断面的および縦断面的にそれぞれ示す。As a light source for a liquid crystal backlight corresponding to this high brightness, an aperture type fluorescent lamp (low-pressure discharge lamp) having a certain area as a light emitting portion and improved reflection efficiency.
Has been developed and is being put to practical use (Japanese Patent Laid-Open No. 9-922).
No. 27) (JP-A-10-106502). Fig. 4 (a),
(b), (c), and (d) are a cross-sectional view and a vertical cross-sectional view, respectively, showing the main configuration of a visible light reflective fluorescent lamp having a conventionally known different configuration. That is, means for generating discharge in the arc tube are different fluorescent lamps, a) both internal electrode systems,
The respective configurations of b) one-side external electrode system, c) both external electrode systems, and d) planar type are shown in a cross sectional view and a longitudinal sectional view, respectively.
【０００４】図４(a) 〜(d) において、１は水銀もしく
はキセノンを少なくとも含む気体を封有するガラス管
（ガラスバルブ）、２は前記ガラス管１の内壁面に設け
られた可視光反射膜、３は前記可視光反射膜２上に設け
られた紫外線による刺激で発光する蛍光体層、４は前記
ガラス管１の両端部もしくは一端部に封装された冷陰極
である。ここで、可視光反射膜２は、一般的に、可視光
領域の反射率の高いアルミナやマグネシアなどで形成さ
れている。In FIGS. 4 (a) to 4 (d), reference numeral 1 denotes a glass tube (glass bulb) containing a gas containing at least mercury or xenon, and 2 denotes a visible light reflecting film provided on the inner wall surface of the glass tube 1. Reference numeral 3 denotes a phosphor layer provided on the visible light reflecting film 2 and emits light when stimulated by ultraviolet rays. Reference numeral 4 denotes a cold cathode sealed at both ends or one end of the glass tube 1. Here, the visible light reflecting film 2 is generally formed of alumina, magnesia, or the like having a high reflectance in the visible light region.
【０００５】なお、前記可視光反射膜２および蛍光体層
３は、一定の方向に可視光を放射し易いように、管軸方
向に一定の幅を除いて形成されており、また、外部電極
方式の場合（図４の(b) ，(c) ）には、帯状の外部電極
４′がガラス管１外周面に設けられている。The visible light reflecting film 2 and the phosphor layer 3 are formed with a certain width in the tube axis direction so as to easily emit visible light in a certain direction. In the case of the system ((b) and (c) in FIG. 4), a strip-shaped external electrode 4 'is provided on the outer peripheral surface of the glass tube 1.
【０００６】さらに、５は前記冷陰極４に一端が接続
し、他端側がガラス管１から封止導出された導入線、
５′は前記外部電極４′に一端が接続し、他端側が電源
側に接続するリード線である。Further, reference numeral 5 denotes a lead-in wire connected to the cold cathode 4 at one end and the other end side sealed out from the glass tube 1.
5 'is a lead wire having one end connected to the external electrode 4' and the other end connected to the power supply.
【０００７】この種の蛍光ランプ、たとえば両内部電極
方式の蛍光ランプ（図４の(a) ）では、導入線５を介し
て各冷陰極４に通電すると、この通電によって発生した
初期プラズマ中のイオンにより、各冷陰極４から二次電
子が放出され、ガラス管１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１内壁面の蛍光体層３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。
ここで、ガラス管１の内壁面に介挿した可視光反射膜に
よって、蛍光体層２で変換された可視光を反射するの
で、結果的に、発光効率を高めることができる。なお、
蛍光体層２を透過した紫外線は、一部ガラス管１内壁面
で反射されながら、一部ガラス管１で吸収される。In a fluorescent lamp of this type, for example, a fluorescent lamp of a double internal electrode system (FIG. 4A), when each cold cathode 4 is energized via the lead-in wire 5, the initial plasma generated by the energization is charged. Secondary electrons are emitted from each cold cathode 4 by the ions, and discharge starts in the glass tube 1. Then, 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 3 on the inner wall surface of the glass tube 1 to emit visible light. Functions as an electric light.
Here, the visible light converted by the phosphor layer 2 is reflected by the visible light reflecting film interposed on the inner wall surface of the glass tube 1, so that the luminous efficiency can be increased as a result. In addition,
The ultraviolet light transmitted through the phosphor layer 2 is partially reflected by the inner wall surface of the glass tube 1 and partially absorbed by the glass tube 1.
【０００８】[0008]
【発明が解決しようとする課題】液晶バックライト用光
源としての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ている。そして、このよう
な動向に伴って、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１内壁面と
蛍光体層３との間に、可視光反射膜２を介挿させた場合
でも、高輝度化という点で問題がある。As described above, regarding a fluorescent lamp as a light source for a liquid crystal backlight, as described above, thin, light, high brightness, and long life of a backlight unit are regarded as important as market trends. I have. With this trend, the light sources (lamps) to be incorporated are also
Further weight reduction, downsizing and higher luminance are desired.
However, as described above, even when the visible light reflecting film 2 is interposed between the inner wall surface of the glass bulb 1 and the phosphor layer 3, there is a problem in that the brightness is increased.
【０００９】すなわち、この種の蛍光ランプの発光は、
図５に模式的に示すように、ガラス管１内で発生した紫
外線は、通常、蛍光体層３において可視光に変換され
る。変換された可視光は、直接放射V-1Dされるか、もし
くは可視光反射膜２で反射して放射 V-IR される。一
方、可視光反射膜２およびガラス管１は、紫外線を反射
しないで、その大部分を吸収する性質を有するため、蛍
光体層３を透過した紫外線の一部は、可視光反射膜２面
で反射UV-P2 され再び発光に寄与するが、残りの大部分
は、可視光反射膜２を透過して吸収UV-R1 され、さら
に、ガラス管１側に吸収UV-G1 されて消滅する。That is, the emission of this kind of fluorescent lamp is
As shown schematically in FIG. 5, ultraviolet light generated in the glass tube 1 is usually converted into visible light in the phosphor layer 3. The converted visible light is directly radiated V-1D or reflected by the visible light reflection film 2 and radiated V-IR. On the other hand, since the visible light reflecting film 2 and the glass tube 1 have a property of absorbing most of the ultraviolet light without reflecting the ultraviolet light, a part of the ultraviolet light transmitted through the phosphor layer 3 is reflected on the surface of the visible light reflecting film 2. The reflected UV-P 2 contributes to light emission again, but most of the rest passes through the visible light reflecting film 2 and is absorbed UV-R 1 , and further absorbed by the glass tube 1 to be absorbed UV-G 1 and disappears. I do.
【００１０】このように、可視光反射膜２の介挿は、可
視光の反射により高輝度化を図れるが、紫外線の利用効
率が十分でないため、発光効率の向上ないし高輝度化に
限界がある。As described above, when the visible light reflecting film 2 is interposed, high luminance can be achieved by reflection of visible light, but there is a limit to improvement of luminous efficiency or high luminance due to insufficient utilization efficiency of ultraviolet rays. .
【００１１】本発明者は、上記発光効率の向上ないし高
輝度化の問題について、鋭意、検討を進めた結果、硫酸
バリウムが良好な可視光反射性を有するとともに、紫外
線を反射する性質を備えていることを見出した。すなわ
ち、アパーチャー型の蛍光ランプなどにおいて、発光ガ
ラス管内壁面と蛍光体層との間に、硫酸バリウムを含む
光反射膜を介挿（下地層）させた場合、蛍光体層を透過
した紫外線が吸収・消滅などせずに、この光反射膜で反
射して再度蛍光体の励起に寄与し、蛍光ランプの高輝度
化が行われることを確認した。The inventor of the present invention has intensively studied the above-mentioned problems of improving the luminous efficiency and increasing the luminance. As a result, barium sulfate has good visible light reflectivity and has a property of reflecting ultraviolet rays. I found that. That is, in the case of an aperture type fluorescent lamp, when a light reflection film containing barium sulfate is interposed between the inner wall surface of the light emitting glass tube and the phosphor layer (underlying layer), the ultraviolet light transmitted through the phosphor layer is absorbed. -It was confirmed that the light was reflected by this light reflection film without being extinguished and again contributed to the excitation of the phosphor, thereby increasing the brightness of the fluorescent lamp.
【００１２】本発明は上記知見に基づいてなされたもの
で、バックライトユニットの薄型、軽量化などが可能
な、高輝度の蛍光ランプを提供することを目的とする。The present invention has been made based on the above findings, and it is an object of the present invention to provide a high-brightness fluorescent lamp capable of reducing the thickness and weight of a backlight unit.
【００１３】[0013]
【課題を解決するための手段】請求項１の発明は、光放
出部を除いて内壁面に光反射膜を介して蛍光体層が設け
られ、かつ水銀もしくはキセノンを少なくとも含む気体
を封有するガラス管、および前記ガラス管内に放電を発
生させる放電発生手段を有する蛍光ランプであって、前
記光反射膜は硫酸バリウムで形成されていることを特徴
とする蛍光ランプである。According to a first aspect of the present invention, there is provided a glass having a phosphor layer provided on an inner wall surface thereof through a light reflecting film except for a light emitting portion, and containing a gas containing at least mercury or xenon. A fluorescent lamp having a tube and discharge generating means for generating a discharge in the glass tube, wherein the light reflection film is formed of barium sulfate.
【００１４】請求項２の発明は、請求項１記載の蛍光ラ
ンプにおいて、光反射膜は硫酸バリウムを含む紫外線反
射物質および可視光反射物質で形成されていることを特
徴とする。According to a second aspect of the present invention, in the fluorescent lamp according to the first aspect, the light reflecting film is formed of an ultraviolet reflecting material containing barium sulfate and a visible light reflecting material.
【００１５】すなわち、請求項１および請求項２の発明
は、発光ガラス管の内壁面に硫酸バリウムもしくは硫酸
バリウムを含む光反射層（薄膜）を介挿し、蛍光体層を
形成したことを骨子とする。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に効率よく吸収させ、こ
の紫外線吸収に伴う励起による可視光の発光効率向上も
しくは高輝度化を図ったものである。[0015] That is, the invention of claim 1 and claim 2 is based on the fact that barium sulfate or a light reflecting layer (thin film) containing barium sulfate is interposed on the inner wall surface of the light emitting glass tube to form a phosphor layer. I do. By adopting such a configuration, the phosphor layer efficiently absorbs ultraviolet rays emitted from the discharge medium excited by the discharge energy, and improves the emission efficiency of visible light or the high brightness by the excitation accompanying the absorption of the ultraviolet rays. It is intended to be.
【００１６】請求項１〜２の発明において、発光ガラス
管の内壁面（蛍光体層の下地）に設ける光反射膜は、少
なくとも硫酸バリウムを含む酸化物で形成される。すな
わち、硫酸バリウムのみで形成してもよいが、硫酸バリ
ウムの組成比を10重量％程度以上、より好ましくは50重
量％程度以上とし、アルミナ、シリカ、マグネシヤ、酸
化亜鉛などの１種以上との混合系で形成してもよい。ま
た、前記光反射膜の形成は、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、発光ガラス管
の内壁面の所定領域に塗布し焼成すればよく、このとき
の膜厚は、一般的に、 1〜20nm程度でよい。In the first and second aspects of the present invention, the light reflecting film provided on the inner wall surface of the light emitting glass tube (underlying the phosphor layer) is formed of an oxide containing at least barium sulfate. That is, it may be formed only of barium sulfate, but the composition ratio of barium sulfate is about 10% by weight or more, more preferably about 50% by weight or more, and one or more of alumina, silica, magnesium, zinc oxide and the like. It may be formed in a mixed system. Further, the formation of the light reflecting film, the fine particle dispersion of the material,
A solution of a metal salt or an organometallic compound may be applied to a predetermined region on the inner wall surface of the light emitting glass tube and fired, and the film thickness at this time may be generally about 1 to 20 nm.
【００１７】このように、少なくとも硫酸バリウムを含
む光反射膜を設けた場合は、蛍光ランプの発光の高効率
化ないし高輝度化が助長される。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光
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て発光効率の大幅
な向上となる。また、前記光反射膜は、蛍光体で光変換
された可視光は、光反射膜で効率よく反射され、所定の
放射領域から集中（集光）的に放出ないし放射されるの
で、高輝度の光放射が行われることになる。As described above, when the light reflecting film containing at least barium sulfate is provided, the efficiency of the light emission of the fluorescent lamp and the increase in luminance are promoted. In other words, since the ultraviolet light that excites the phosphor in the phosphor layer and is converted into the required visible light is reflected by the light reflection layer and again contributes to the excitation of the phosphor, more efficient visible light conversion is achieved. As a result, the luminous efficiency is greatly improved. Further, the light reflecting film reflects the visible light converted by the phosphor efficiently with the light reflecting film and emits or radiates the light from the predetermined radiation area in a concentrated (condensed) manner. Light emission will take place.
【００１８】上記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、蛍光ランプの小形、軽量化が
図られることにもなる。つまり、すぐれた紫外線反射お
よび可視光反射性によって、蛍光体が発光する可視光の
効率的な利用などによって、発光の高効率化や小形軽量
化など図られた蛍光ランプが提供される。By adopting the above configuration, the emission luminance and the luminous efficiency can be improved. Therefore, when the same luminescence intensity and luminance are expected, the size and weight of the fluorescent lamp can be reduced. In other words, a fluorescent lamp is provided that achieves high efficiency of light emission, small size and light weight by efficient use of visible light emitted by a phosphor due to excellent ultraviolet light reflection and visible light reflectivity.
【００１９】[0019]
【発明の実施の形態】次に図１，第２図および第３図を
参照して実施例を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment will be described with reference to FIGS. 1, 2 and 3. FIG.
【００２０】図１はアパーチャー型蛍光ランプの要部構
成を断面的に示したものである。図１において、６は放
電媒体、たとえば希ガスおよび水銀、もしくはキセノン
を封有する外径 3.0mm，内径 2.0mmのガラス管、７は前
記ガラス管６の内壁面に管軸方向に、幅 2.0mm程度の帯
状の領域（光放出部）を残して設けられた硫酸バリウム
から成る厚さ10μm 程度の光反射膜、８は前記光反射膜
７上に設けられた紫外線による刺激で発光する厚さ10〜
15μm 程度の蛍光体層である。ここで、光反射膜７は、
たとえば平均粒系 0.1〜 1.0μm 程度の硫酸バリウム粉
末をメチルアルコールに分散・懸濁した懸濁液をガラス
管６の内壁面に、選択的に塗布、自然乾燥し、その後、
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。 また、９，９′は前記ガラス管６
の両端部にそれぞれ封入された一対の冷陰極、10，10′
は前記冷陰極９，９′に一端が接続し、他端側がガラス
管６から封止導出された導入線である。FIG. 1 is a sectional view showing the structure of a main part of an aperture type fluorescent lamp. In FIG. 1, reference numeral 6 denotes a glass tube having a discharge medium, for example, a rare gas and mercury or xenon, having an outer diameter of 3.0 mm and an inner diameter of 2.0 mm. A light reflecting film made of barium sulfate and having a thickness of about 10 μm provided leaving a band-like area (light emitting portion) of about 10 μm. ~
It is a phosphor layer of about 15 μm. Here, the light reflecting film 7 is
For example, a suspension obtained by dispersing and suspending barium sulfate powder having an average particle size of about 0.1 to 1.0 μm in methyl alcohol is selectively applied to the inner wall surface of the glass tube 6 and air-dried.
It is formed by firing at a temperature of about 600 ° C. for about 15 minutes. 9, 9 'is the glass tube 6;
, A pair of cold cathodes respectively sealed at both ends of the
Is an introduction line which is connected at one end to the cold cathodes 9, 9 'and the other end is sealed out from the glass tube 6.
【００２１】上記蛍光ランプは、導入線10，10′を介し
て各冷陰極９，９′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９，９′か
ら二次電子を放出し、ガラス管６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）であるたとえばキセノン原子の共鳴励起
によって紫外線を放射する。When the above-mentioned fluorescent lamp is energized to the respective cold cathodes 9, 9 'through the introduction lines 10, 10', secondary ions are generated from the respective cold cathodes 9, 9 'by the ions in the initial plasma generated by the energization. Electrons are emitted, and discharge starts in the glass tube 6.
The discharge energy accompanying the start of the discharge radiates ultraviolet rays by resonance excitation of a discharge medium (encapsulated gas), for example, xenon atoms.
【００２２】また、この放射された紫外線は、ガラス管
６内壁面の蛍光体層８を励起して、可視光に変換され、
変換された可視光は直接もしくは下層の光反射膜７によ
って反射されて、光放出部の管璧を透過してガラス管６
外に放出ないし放射される。さらに、前記蛍光体層８を
透過した紫外線は、硫酸バリウムから成る光反射膜７で
反射され、再び収蛍光体層８側に戻されて蛍光体を励起
し、可視光に変換され発光する。The emitted ultraviolet light excites the phosphor layer 8 on the inner wall surface of the glass tube 6 and is converted into visible light.
The converted visible light is reflected directly or by the lower light reflection film 7, passes through the light-emitting portion, and passes through the glass tube 6.
Released or radiated out. Further, the ultraviolet light transmitted through the phosphor layer 8 is reflected by the light reflection film 7 made of barium sulfate, is returned to the phosphor collection layer 8 side, excites the phosphor, and is converted into visible light to emit light.
【００２３】図２はこの状態を模式的に示したもので、
ガラス管６内で発生した紫外線は、通常、蛍光体層８に
おいて可視光に変換される。変換された可視光は、直接
放射V-1Dされるか、もしくは光反射膜７で反射して放射
V-1R される。一方、蛍光体層８を透過した紫外線は、
一部反射膜７を透過 UV-RIするが、大部分は光反射膜７
面で反射UV-P2 され、再び蛍光体層８に戻され、ここで
可視光に変換され、この変換された可視光は、前記の場
合同様に、直接放射V-2Dされるか、もしくは光反射膜７
で反射して放射 V-2R される。FIG. 2 schematically shows this state.
The ultraviolet light generated in the glass tube 6 is usually converted into visible light in the phosphor layer 8. The converted visible light is directly radiated V-1D or reflected by the light reflection film 7 and radiated.
V-1R. On the other hand, the ultraviolet light transmitted through the phosphor layer 8 is
UV-RI is transmitted through a part of the reflective film 7, but most of the light is reflected by the light reflective film 7.
Surface in reflected UV-P 2, is returned in the phosphor layer 8 again, where it is converted into visible light, or the converted visible light, like the case above, is directly radiated V-2D, or Light reflection film 7
It is reflected and radiated V-2R.
【００２４】このように、ガラス管６内で発生した紫外
線は、一旦、蛍光体層８を透過しても、硫酸バリウム系
の光反射膜７によって、蛍光体層８に戻されて再度発光
に寄与する。つまり、発生した紫外線は、可視光反射膜
と異なり、硫酸バリウム系の光反射膜７の場合は可視光
を反射するだけでなく、紫外線を蛍光体層８に反射・戻
すため、前記紫外線が、より有効に利用されることにな
る。したがって、発光効率の向上ないし高輝度化が容易
に達成される。As described above, even if the ultraviolet rays generated in the glass tube 6 pass through the phosphor layer 8 once, the ultraviolet rays are returned to the phosphor layer 8 by the barium sulfate-based light reflecting film 7 to emit light again. Contribute. That is, unlike the visible light reflecting film, the generated ultraviolet light reflects the visible light as well as reflects and returns the ultraviolet light to the phosphor layer 8 in the case of the barium sulfate-based light reflecting film 7. It will be used more effectively. Therefore, an improvement in luminous efficiency or an increase in luminance can be easily achieved.
【００２５】図３は、上記構成の蛍光ランプについて、
管電力（入力電力）と輝度（相対輝度％）との関係例
（曲線Ａ）を、従来のアパーチャー型で可視光反射膜付
き蛍光ランプの場合（曲線ａ）と比較して示したもので
ある。ここで、比較例のアパーチャー型蛍光ランプは、
実施例の光反射膜（硫酸バリウム系）の代りに、アルミ
ナから成る可視光反射膜を設けた以外、同様の条件で構
成されたものである。FIG. 3 shows a fluorescent lamp having the above structure.
7 shows an example of the relationship between the tube power (input power) and the luminance (relative luminance%) (curve A) in comparison with the case of a conventional aperture-type fluorescent lamp with a visible light reflecting film (curve a). . Here, the aperture type fluorescent lamp of the comparative example is
This was constructed under the same conditions except that a visible light reflecting film made of alumina was provided instead of the light reflecting film (barium sulfate-based) of the embodiment.
【００２６】上記では、発光管（ガラス管）内の放電発
生手段が、両内部電極方式の蛍光ランプについて例示し
たが、前記図４(b) 〜(d) にそれぞれ横断面的および縦
断面的に示すような片側外部電極方式（図４(b) ）、両
外部電極方式（図４(c) ）、平面型（図４(d) ）の構成
であってもよい。すなわち、可視光反射型の片側外部電
極方式、両外部電極方式、もしくは平面型の構成におい
て、可視光反射膜２を硫酸バリウム系の光反射膜７に代
替させた構成としてもよい。In the above, the discharge generating means in the arc tube (glass tube) is exemplified by a fluorescent lamp of a double internal electrode type. However, FIGS. 4 (b) to 4 (d) show a cross sectional view and a vertical sectional view, respectively. A single-sided external electrode system (FIG. 4 (b)), a double external electrode system (FIG. 4 (c)), and a planar type (FIG. 4 (d)) as shown in FIG. That is, the visible light reflection film 2 may be replaced with a barium sulfate-based light reflection film 7 in a visible light reflection type one-side external electrode system, a double external electrode system, or a planar structure.
【００２７】また、上記では、硫酸バリウムのみで光反
射膜７を形成した例を示したが、たとえば硫酸バリウム
10重量％（好ましくは50重量％程度以上）で、残余がア
ルミナ、マグネシア、シリカ、亜鉛（いずれも可視光反
射膜形成材）などの１種以上である混合系で形成しても
同様に、発光効率の向上ないし輝度の向上が図られる。
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、冷陰極や害電極の構成・材質、蛍光体
層中の蛍光体、封有ガスの組成、ランプの形状、光放出
部の形状、反射膜の厚さなども特に限定されるものでは
ない。In the above description, the light reflection film 7 is formed only of barium sulfate.
10% by weight (preferably about 50% by weight or more), the same applies when the mixture is formed of a mixture of at least one of alumina, magnesia, silica, and zinc (all of which are visible light reflective film forming materials). The luminous efficiency or the luminance is improved.
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 and material of the cold cathode and the harmful electrode, the phosphor in the phosphor layer, the composition of the sealing gas, the shape of the lamp, the shape of the light emitting portion, and the thickness of the reflection film are not particularly limited. .
【００２８】[0028]
【発明の効果】請求項１〜２の発明によれば、硫酸バリ
ウム系の光反射膜による紫外線の反射再利用、さらには
光反射膜による可視光の反射作用によって、可視光の発
光効率向上、紫外線の効率的な作用で発光の高輝度化が
容易に図られる。すなわち、硫酸バリウム系光反射膜の
紫外線反射、および可視光反射が同時に達成されるの
で、蛍光体層での発光効率が高まり、また、蛍光ランプ
の輝度も大幅に向上する。According to the first and second aspects of the present invention, the reflection and reuse of ultraviolet rays by the barium sulfate-based light reflection film, and the improvement of visible light emission efficiency by the visible light reflection action of the light reflection film, High efficiency of light emission can be easily achieved by the efficient action of ultraviolet light. That is, since the ultraviolet reflection and the visible light reflection of the barium sulfate-based light reflection film are simultaneously achieved, the luminous efficiency of the phosphor layer is increased, and the luminance of the fluorescent lamp is also significantly improved.
【００２９】この発光輝度の大幅な向上は、一方では、
蛍光ランプの消費電力の低減化や冷蛍光ランプの小形、
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 in the light emission luminance is as follows.
Reduction of the power consumption of fluorescent lamps and compact fluorescent lamps,
Since the weight can be reduced, it contributes to the realization of a small, high-quality liquid crystal display device, for example.
【図１】実施例に係る蛍光ランプの要部構成を示す図
で、(a) 横断面図、(b) 縦断面図。FIG. 1 is a diagram showing a configuration of a main part of a fluorescent lamp according to an embodiment, in which (a) is a cross-sectional view and (b) is a longitudinal cross-sectional view.
【図２】実施例に係る蛍光ランプにおける光の進路例を
示す模式図。FIG. 2 is a schematic diagram showing an example of a light path in a fluorescent lamp according to an embodiment.
【図３】実施例に係る蛍光ランプおよび従来の可視光反
射膜付き蛍光ランプについて、管電力と輝度都の関係例
を比較して示す特性図。FIG. 3 is a characteristic diagram showing a comparative example of a relationship between tube power and luminance of the fluorescent lamp according to the example and the conventional fluorescent lamp with a visible light reflecting film.
【図４】(a) ，(b) ，(c) ，(d) は従来の互いに異なる
可視光反射膜付き蛍光ランプの要部構成を示す断面図。4 (a), (b), (c), (d) are cross-sectional views showing the main parts of a conventional fluorescent lamp with a visible light reflecting film different from each other.
【図５】可視光反射膜付き蛍光ランプにおける光の進路
例を示す模式図。FIG. 5 is a schematic diagram showing an example of a light path in a fluorescent lamp with a visible light reflecting film.
１，６……ガラス管 ２……可視光反射膜 ３，８……蛍光体層 ４，９，９′……冷陰極 ４……外部電極 ５，10，10′……導入線 ７……硫酸バリウム系の光反射膜 1, 6 ... glass tube 2 ... visible light reflecting film 3, 8 ... phosphor layer 4, 9, 9 '... cold cathode 4 ... external electrode 5, 10, 10' ... introduction line 7 ... Barium sulfate-based light reflecting film
Claims (2)
して蛍光体層が設けられ、かつ水銀もしくはキセノンを
少なくとも含む気体を封有するガラス管、および前記ガ
ラス管内に放電を発生させる放電発生手段を有する蛍光
ランプであって、 前記光反射膜は少なくとも硫酸バリウムを含む物質で形
成されていることを特徴とする蛍光ランプ。1. A glass tube provided with a phosphor layer on an inner wall surface except for a light emitting portion via a light reflecting film and containing a gas containing at least mercury or xenon, and generating a discharge in the glass tube. A fluorescent lamp having a discharge generating means, wherein the light reflection film is formed of a material containing at least barium sulfate.
射物質および可視光反射物質で形成されていることを特
徴とする請求項１記載の蛍光ランプ。2. The fluorescent lamp according to claim 1, wherein the light reflecting film is formed of an ultraviolet reflecting material containing barium sulfate and a visible light reflecting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10289463A JP2000123789A (en) | 1998-10-12 | 1998-10-12 | Fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10289463A JP2000123789A (en) | 1998-10-12 | 1998-10-12 | Fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000123789A true JP2000123789A (en) | 2000-04-28 |
Family
ID=17743604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10289463A Withdrawn JP2000123789A (en) | 1998-10-12 | 1998-10-12 | Fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000123789A (en) |
Cited By (2)
| 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 |
| EP2927932A1 (en) * | 2014-03-31 | 2015-10-07 | Toshiba Lighting & Technology Corporation | Incandescent lamp with reflective coating |
-
1998
- 1998-10-12 JP JP10289463A patent/JP2000123789A/en not_active Withdrawn
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 |
| 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 |
| EP2927932A1 (en) * | 2014-03-31 | 2015-10-07 | Toshiba Lighting & Technology Corporation | Incandescent lamp with reflective coating |
| US9263246B2 (en) | 2014-03-31 | 2016-02-16 | Toshiba Lighting & Technology Corporation | Lamp |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5343114A (en) | High-pressure glow discharge lamp | |
| JP5137391B2 (en) | Dielectric barrier discharge lamp | |
| JPH02299146A (en) | Low pressure mercury vapor discharge lamp | |
| JP2001081460A (en) | Ultraviolet-luminescent material, and ultraviolet- luminescent fluorescent-lamp and ultraviolet- luminescent element using same | |
| JP3667414B2 (en) | Cold cathode low pressure discharge lamp | |
| JP2000123789A (en) | Fluorescent lamp | |
| JP3189285B2 (en) | Electrodeless low pressure discharge lamp | |
| JP2003007252A (en) | Cold cathode fluorescent lamp and lighting system | |
| JP2003151496A (en) | Cold cathode discharge lamp and lighting device | |
| JP2002319373A (en) | Electrodeless low-pressure discharge lamp having ultraviolet ray-reflecting layer | |
| JP2001102004A (en) | Inert gas discharge lamp and the lighting apparatus | |
| JPH09102298A (en) | Cold electrode low-pressure discharge lamp | |
| JP3653552B2 (en) | Cold cathode fluorescent lamp and lighting device | |
| JPH1050261A (en) | Discharge lamp, lighting system, and display device | |
| JP3158826B2 (en) | Small fluorescent tube and flat light emitting device equipped with small fluorescent tube | |
| JP3697031B2 (en) | Low pressure discharge lamp and lighting device | |
| JP3470449B2 (en) | Cold cathode discharge lamp device, lighting device using the same, backlight, liquid crystal display device | |
| JP3686792B2 (en) | Cold cathode fluorescent lamp | |
| JP2007134059A (en) | Rare gas fluorescent lamp and light source device | |
| JPH11265685A (en) | Fluorescent lamp | |
| JPH1125916A (en) | Cold-cathode fluorescent lamp and lighting system | |
| JP3409461B2 (en) | Electrodeless discharge lamp | |
| JP2003016994A (en) | Cold cathode fluorescent lamp and lighting system | |
| JPH09199085A (en) | Fluorescent lamp and lighting system using it | |
| KR100731154B1 (en) | Electrodeless xenon phosphor lamp |
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: 20060110 |