JP3341443B2 - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JP3341443B2 JP3341443B2 JP04427494A JP4427494A JP3341443B2 JP 3341443 B2 JP3341443 B2 JP 3341443B2 JP 04427494 A JP04427494 A JP 04427494A JP 4427494 A JP4427494 A JP 4427494A JP 3341443 B2 JP3341443 B2 JP 3341443B2
- Authority
- JP
- Japan
- Prior art keywords
- mercury
- fluorescent lamp
- protective film
- glass tube
- amount
- 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.)
- Ceased
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水銀封入量を削減した
蛍光ランプに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp having a reduced mercury filling amount.
【０００２】[0002]
【従来の技術】従来の蛍光ランプは、直管４０Ｗ蛍光ラ
ンプにおいて０．０１１ｍｇ／ｃｍ3、コンパクト蛍光
ランプ（ＦＤＬ２７）において０．０５ｍｇ／ｃｍ3の
水銀が封入されていた（特開平１−１６９８３８号公
報）。これら蛍光ランプに封入されている水銀の量は、
そのランプに実際に必要な量以上の水銀が封入されてい
る。これは、蛍光ランプの寿命中に水銀が蛍光ランプを
構成する蛍光体やガラス管および電極に付着されている
電子放射性物質等に吸着したり、それらの物質と化学反
応を起こしたりして放電に必要な水銀蒸気を供給する水
銀（以後、この水銀のことを自由水銀と記す）が不足す
ることにより、不点を防ぐためである。Conventional fluorescent lamps, the straight tube 40W fluorescent lamp 0.011 mg / cm 3, mercury 0.05 mg / cm 3 in a compact fluorescent lamp (FDL27) has been filled (JP-A-1-169838 No.). The amount of mercury enclosed in these fluorescent lamps is
The lamp contains more mercury than is actually needed. This is because during the life of the fluorescent lamp, mercury is adsorbed on the fluorescent material that constitutes the fluorescent lamp, the electron-emitting substance attached to the glass tube and the electrodes, or causes a chemical reaction with those substances to cause discharge. This is to prevent inconvenience caused by a shortage of mercury that supplies necessary mercury vapor (hereinafter, this mercury is referred to as free mercury).
【０００３】[0003]
【発明が解決しようとする課題】しかし、このような従
来の蛍光ランプでは水銀封入量が多いために、ランプ廃
却時において環境汚染の面で問題があった。However, such a conventional fluorescent lamp has a problem in terms of environmental pollution when the lamp is discarded due to a large amount of mercury enclosed therein.
【０００４】本発明は、このような問題を解決するため
になされたもので、必要水銀量を大幅に少なくすること
のできる蛍光ランプを提供するものである。The present invention has been made to solve such a problem, and it is an object of the present invention to provide a fluorescent lamp capable of greatly reducing the required amount of mercury.
【０００５】[0005]
【課題を解決するための手段】本発明の蛍光ランプは、
内部に水銀を封入したガラス管の内面に金属酸化物から
なる保膜および蛍光体膜を順次形成した蛍光ランプにお
いて、前記保護膜が、酸化アルミニウム、酸化チタニウ
ム、酸化セリウムおよび酸化マグネシウムの少なくとも
一種からなるとともに、前記保護膜の厚さ（μｍ）が
０．２〜１．０の範囲にあり、かつ前記ガラス管の単位
内容積に対する水銀量（ｍｇ／ｃｍ3）が０．００５９
〜０．００８８の範囲にある構成を有する。 A fluorescent lamp according to the present invention comprises:
In a fluorescent lamp, a protective film made of metal oxide and a fluorescent film are sequentially formed on an inner surface of a glass tube in which mercury is sealed, wherein the protective film is made of aluminum oxide, titanium oxide.
Cerium oxide and magnesium oxide
And the thickness (μm) of the protective film is in the range of 0.2 to 1.0, and the amount of mercury (mg / cm 3 ) per unit internal volume of the glass tube is 0.0059.
It has a configuration in the range of ~ 0.0088 .
【０００６】[0006]
【作用】この構成により、蛍光ランプに使用する水銀の
量を大幅に削減できる。With this configuration, the amount of mercury used in the fluorescent lamp can be greatly reduced.
【０００７】[0007]
【実施例】蛍光ランプにおいて、封入されている水銀
は、その寿命中に、例えば蛍光体、電子放射性物質、ガ
ラス管等に吸着、反応して蒸発しにくい形態となる。そ
れらの中でも、自由水銀の減少に占めるガラス管中のナ
トリウムの影響は大きく、すなわち、ガラス管内面や蛍
光体膜に拡散したナトリウムと水銀との反応により、自
由水銀が減少する。発明者はこのような事情にかんがみ
て、ガラス管中のナトリウムと水銀とを隔絶する保護膜
に検討を加え、本発明を完成するに至った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In a fluorescent lamp, the enclosed mercury is adsorbed and reacted with, for example, a phosphor, an electron-emitting substance, a glass tube, or the like during its life, so that it is difficult to evaporate. Among them, the effect of sodium in the glass tube on the reduction of free mercury is great, that is, free mercury is reduced by the reaction between mercury and sodium diffused on the inner surface of the glass tube and the phosphor film. In view of such circumstances, the inventor has studied a protective film that separates sodium and mercury in a glass tube, and has completed the present invention.
【０００８】以下、本発明の一実施例について図面を用
いて説明する。図１に示すように、本発明実施例の直管
４０Ｗ蛍光ランプは、ガラス管１の内面に保護膜２およ
び蛍光体膜３が順次形成され、ガラス管１の両端部にス
テム５で支持された電極４が設けられ、かつ、内部に水
銀および希ガスが封入されている。ガラス管１の内容積
は６５６ｃｍ3である。保護膜２には酸化アルミニウム
が、蛍光体膜３には、青色蛍光体（BaMg2Al16O27:E
u2+）、緑色蛍光体（LaPO4:Ce3+,Tb3+）および赤色蛍光
体（Y2O3:Eu3+）を混合したものがそれぞれ用いられて
いる。An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, in a straight tube 40 W fluorescent lamp according to an embodiment of the present invention, a protective film 2 and a phosphor film 3 are sequentially formed on the inner surface of a glass tube 1, and are supported by stems 5 at both ends of the glass tube 1. Electrode 4 is provided, and mercury and a rare gas are sealed therein. The internal volume of the glass tube 1 is 656 cm 3 . The protective film 2 is made of aluminum oxide, and the phosphor film 3 is made of a blue phosphor (BaMg 2 Al 16 O 27 : E
u 2+ ), a mixture of a green phosphor (LaPO 4 : Ce 3+ , Tb 3+ ) and a red phosphor (Y 2 O 3 : Eu 3+ ) are used.
【０００９】このような蛍光ランプのガラス管１内に希
ガスとしてアルゴンガスを３３０Ｐａ封入し、水銀を
８、６、５、４、３および２ｍｇと変化させたランプを
製作した。これらの水銀量は、ガラス管１の単位内容積
あたりの水銀量がそれぞれ０．０１２、０．００８８、
０．００７４、０．００５９、０．００４４および０．
００２９ｍｇ／ｃｍ3となるものである。これらの蛍光
ランプをそれぞれ１０本製作し、定格寿命１２０００時
間までの点灯試験を行ったところ、図２に示すとおりの
結果が得られた。なお、図２中、×印は１０本のうち１
本でも不点になった場合、○印は１０本すべて定格寿命
を満足した場合をそれぞれ示す。An argon gas as a rare gas was filled in the glass tube 1 of such a fluorescent lamp at 330 Pa, and a lamp in which mercury was changed to 8, 6, 5, 4, 3, and 2 mg was manufactured. The mercury amount per unit volume of the glass tube 1 is 0.012, 0.0088,
0.0074, 0.0059, 0.0044 and 0.
0029 mg / cm 3 . Each of these 10 fluorescent lamps was manufactured, and a lighting test was performed up to a rated life of 12,000 hours. As a result, the results shown in FIG. 2 were obtained. In addition, in FIG.
In the case where there is no point in any of the books, the mark 場合 indicates that all of the ten books satisfy the rated life.
【００１０】図２から明らかなように、保護膜の厚さが
０．２〜１．０μｍ、かつ水銀封入量が４〜６ｍｇ、す
なわち単位内容積あたり０．００５９〜０．００８８ｍ
ｇ／ｃｍ3で定格寿命を満足することがわかる。ここ
で、水銀封入量の上限を０．００８８ｍｇ／ｃｍ3とし
たのはガラス管内に存在する材料の特性の相違または水
銀封入方法のばらつき等を考慮して定格寿命を満足でき
るようにするためである。また、保護膜の厚さの上限を
１．０μｍとしたのは、これを越えた膜厚では膜の可視
光透過率の減少、膜剥離の発生が認められたためであ
る。As is apparent from FIG. 2, the thickness of the protective film is 0.2 to 1.0 μm and the amount of enclosed mercury is 4 to 6 mg, that is, 0.0059 to 0.0088 m per unit internal volume.
It can be seen that the rated life is satisfied at g / cm 3 . Here, the upper limit of the amount of enclosed mercury is set to 0.0088 mg / cm 3 so that the rated life can be satisfied in consideration of the difference in the characteristics of the materials existing in the glass tube or the variation in the method of injecting mercury. is there. The reason why the upper limit of the thickness of the protective film is set to 1.0 μm is that when the film thickness exceeds this, the visible light transmittance of the film is reduced and the film is peeled off.
【００１１】以上のように、本発明実施例の蛍光ランプ
は、ガラス管１内面に金属酸化物からなる保護膜２およ
び蛍光体膜３を順次形成し、保護膜２の厚さ（μｍ）を
０．２〜１．０の範囲とし、かつ蛍光ランプの単位内容
積に対する水銀量（ｍｇ／ｃｍ3）を０．００５９〜
０．００８８の範囲とすることによって、従来に比して
水銀封入量を大幅に削減することができる。As described above, in the fluorescent lamp of the embodiment of the present invention, the protective film 2 and the phosphor film 3 made of a metal oxide are sequentially formed on the inner surface of the glass tube 1 and the thickness (μm) of the protective film 2 is reduced. And the amount of mercury (mg / cm 3 ) per unit internal volume of the fluorescent lamp is 0.0059 to 0.0059.
By setting the range to 0.0088, the amount of enclosed mercury can be greatly reduced as compared with the conventional case.
【００１２】なお、上記実施例では保護膜２として酸化
アルミニウムを用いた場合について説明したが、酸化チ
タニウム、酸化セリウムおよび酸化マグネシウムの各単
独、または、混合したものを用いた場合も全く同様の結
果が得られることが確認された。また、上記実施例では
希土類蛍光体を用いたが、他の蛍光体についても同様な
結果を得ることができる。さらに、上記実施例では直管
の蛍光ランプについて示したが、他の形状の蛍光ランプ
でも同様の効果が得られるものである。In the above embodiment, the case where aluminum oxide was used for the protective film 2 was described. However, the same results were obtained when titanium oxide, cerium oxide and magnesium oxide were used alone or in combination. Was obtained. In the above embodiment, a rare earth phosphor is used, but similar results can be obtained for other phosphors. Further, in the above-described embodiment, a straight tube fluorescent lamp has been described, but a similar effect can be obtained with a fluorescent lamp of another shape.
【００１３】[0013]
【発明の効果】以上説明したように、本発明は、ガラス
管と蛍光体膜との間に所定の厚さを有する保護膜を設け
ることによって、従来解決が困難とされていた大幅な水
銀封入量の削減に対しても、定格寿命を満足できるとい
うすぐれた効果を有する蛍光ランプを提供することがで
きる。As described above, according to the present invention, by providing a protective film having a predetermined thickness between a glass tube and a phosphor film, a large amount of mercury filling, which has been difficult to solve conventionally, is provided. It is possible to provide a fluorescent lamp having an excellent effect that the rated life can be satisfied even when the amount is reduced.
【図１】本発明の一実施例である蛍光ランプの一部切欠
正面図FIG. 1 is a partially cutaway front view of a fluorescent lamp according to an embodiment of the present invention.
【図２】蛍光ランプの保護膜の厚さと水銀封入量に対す
る寿命試験結果を示す図FIG. 2 is a graph showing life test results with respect to the thickness of a protective film and the amount of enclosed mercury of a fluorescent lamp.
１ ガラス管 ２ 保護膜 ３ 蛍光体膜 ４ 電極 DESCRIPTION OF SYMBOLS 1 Glass tube 2 Protective film 3 Phosphor film 4 Electrode
───────────────────────────────────────────────────── フロントページの続き (72)発明者 東 亨 大阪府高槻市幸町１番１号 松下電子工 業株式会社内 (56)参考文献 特開 昭55−3114（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) H01J 61/35 H01J 61/20 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tohru Higashi, 1-1, Sachimachi, Takatsuki-shi, Osaka Inside Matsushita Electronics Corporation (56) References JP-A-55-3114 (JP, A) (58) Field surveyed (Int.Cl. 7 , DB name) H01J 61/35 H01J 61/20
Claims (1)
金属酸化物からなる保膜および蛍光体膜を順次形成した
蛍光ランプにおいて、前記保護膜が、酸化アルミニウ
ム、酸化チタニウム、酸化セリウムおよび酸化マグネシ
ウムの少なくとも一種からなるとともに、前記保護膜の
厚さ（μｍ）が０．２〜１．０の範囲にあり、かつ前記
ガラス管の単位内容積に対する水銀量（ｍｇ／ｃｍ3）
が０．００５９〜０．００８８の範囲にあることを特徴
とする蛍光ランプ。1. A fluorescent lamp in which a protective film made of metal oxide and a fluorescent film are sequentially formed on the inner surface of a glass tube in which mercury is sealed, wherein the protective film is made of aluminum oxide.
System, titanium oxide, cerium oxide, and magnesium oxide
And the thickness (μm) of the protective film is in the range of 0.2 to 1.0, and the amount of mercury (mg / cm 3 ) per unit internal volume of the glass tube.
Is in the range of 0.0059 to 0.0088.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04427494A JP3341443B2 (en) | 1994-03-15 | 1994-03-15 | Fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04427494A JP3341443B2 (en) | 1994-03-15 | 1994-03-15 | Fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07254390A JPH07254390A (en) | 1995-10-03 |
| JP3341443B2 true JP3341443B2 (en) | 2002-11-05 |
Family
ID=12686937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04427494A Ceased JP3341443B2 (en) | 1994-03-15 | 1994-03-15 | Fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3341443B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5869927A (en) * | 1995-07-31 | 1999-02-09 | Matsushita Electronics Corporation | Fluorescent lamp with a mixed layer containing phosphor and metal oxide |
| EP2341526B1 (en) * | 2005-05-31 | 2012-05-23 | Panasonic Corporation | Fluorescent lamp and process for producing the same, and lighting system |
| JP2007305431A (en) * | 2006-05-11 | 2007-11-22 | Matsushita Electric Ind Co Ltd | Fluorescent lamp, and lighting device equipped therewith |
| JP4927890B2 (en) * | 2009-01-13 | 2012-05-09 | オスラム・メルコ株式会社 | Fluorescent lamp and lighting equipment |
-
1994
- 1994-03-15 JP JP04427494A patent/JP3341443B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07254390A (en) | 1995-10-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RVOP | Cancellation by post-grant opposition |