JPH03283348A - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JPH03283348A JPH03283348A JP8384290A JP8384290A JPH03283348A JP H03283348 A JPH03283348 A JP H03283348A JP 8384290 A JP8384290 A JP 8384290A JP 8384290 A JP8384290 A JP 8384290A JP H03283348 A JPH03283348 A JP H03283348A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- layer
- phosphor layer
- fluorescent material
- lamp
- 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.)
- Pending
Links
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052753 mercury Inorganic materials 0.000 claims abstract description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 171
- 238000000295 emission spectrum Methods 0.000 claims description 3
- 238000009877 rendering Methods 0.000 abstract description 25
- 230000004907 flux Effects 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 14
- 239000010410 layer Substances 0.000 description 72
- 239000000047 product Substances 0.000 description 15
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 description 10
- -1 europium-activated barium Chemical class 0.000 description 10
- 230000002596 correlated effect Effects 0.000 description 9
- 239000006227 byproduct Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 229910052749 magnesium Inorganic materials 0.000 description 5
- 239000011777 magnesium Substances 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 5
- 229910052693 Europium Inorganic materials 0.000 description 4
- 230000003595 spectral effect Effects 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 241000972773 Aulopiformes Species 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910001477 LaPO4 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- LWNCNSOPVUCKJL-UHFFFAOYSA-N [Mg].[P] Chemical compound [Mg].[P] LWNCNSOPVUCKJL-UHFFFAOYSA-N 0.000 description 1
- FIMLVRCVMNGRMP-UHFFFAOYSA-N [Mn].[Eu] Chemical compound [Mn].[Eu] FIMLVRCVMNGRMP-UHFFFAOYSA-N 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- BJPSZEJAKKDDCT-UHFFFAOYSA-L calcium;chloro-dioxido-oxo-$l^{5}-phosphane Chemical compound [Ca+2].[O-]P([O-])(Cl)=O BJPSZEJAKKDDCT-UHFFFAOYSA-L 0.000 description 1
- DXNVUKXMTZHOTP-UHFFFAOYSA-N dialuminum;dimagnesium;barium(2+);oxygen(2-) Chemical class [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Mg+2].[Mg+2].[Al+3].[Al+3].[Ba+2].[Ba+2] DXNVUKXMTZHOTP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002730 mercury Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 235000019515 salmon Nutrition 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は、電極を備えたバルブ内にけい光体被膜を形成
し、このけい光体被膜が３波長域発光けい光体で形成さ
れたけい光ランプに関する。[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention is directed to forming a phosphor coating within a bulb provided with electrodes, and this phosphor coating emits fluorescent light in a three-wavelength range. Concerning a fluorescent lamp formed by the body.
（従来の技術）
最近のけい光ランプは、高効率および高演色性を得るた
めバルブの内面に形成されるけい光体被膜を３波長域発
光けい光体によって構成しているものが多い。(Prior Art) In many recent fluorescent lamps, the phosphor coating formed on the inner surface of the bulb is composed of a phosphor that emits light in a three-wavelength range in order to obtain high efficiency and high color rendering properties.
３波長域発光けい光体は、４５０ｎｍ付近に発光ピーク
波長を白゛する例えばユーロピウム付活バリウム９マグ
ネシウム・アルミン酸塩けい光体（３（Ｂａ、Ｍｇ）０
．８Ａ １２０．： Ｅｕｌなどのような青色発光けい
光体と、５４０ ｎｍ付近に発光ピーク波長を有する例
えばセリウム・テリビウム付活リン酸ランタンけい光体
（Ｌ ａ Ｐ ０４ ： Ｃｅ 、 Ｔ ｂ ｌ な
どの緑色発光けい光体と、６１０ｎｍ付近に発光ピーク
波長を有する例えばユーロピウム付活イツトリウムオキ
サイドけい光体（Ｙ、０．： Ｅｕｌ などのような赤
色発光けい光体の３種を混合して形成されている。A three-wavelength range emitting phosphor is, for example, a europium-activated barium 9 magnesium aluminate phosphor (3 (Ba, Mg) 0), which has an emission peak wavelength around 450 nm.
．． 8A 120. : A blue-emitting phosphor such as Eul, and a green-emitting phosphor such as cerium-terbium-activated lanthanum phosphate phosphor (L a P 04 : Ce, T b l ) having an emission peak wavelength around 540 nm. It is formed by mixing three types of phosphors: a luminous material and a red-emitting phosphor such as a europium-activated yttrium oxide phosphor (Y, 0.: Eul) having an emission peak wavelength around 610 nm.
しかしながら、最近ではさらに高効率および高演色性の
けい光ランプが要請されており、このためけい光体に対
する研究が進められている。However, recently there has been a demand for fluorescent lamps with even higher efficiency and color rendering properties, and for this reason, research on phosphors is progressing.
上記３波長域発光けい光体は、従来からよく知られてい
るハロリン酸カルシウムけい光体などに比べて演色性お
よび効率に優れているが、ハロリン酸カルシウムけい光
体と同様に、波長４００ｎｓ以下の紫外線のみを可視光
に変換するため、４３６ｒ＋ｇ＋や４０５ ｎｍの明る
さや演色性にあまり寄与しない水銀発光色は外部に無駄
に放出されてしまう。The above three-wavelength band emitting phosphor has superior color rendering properties and efficiency compared to the conventionally well-known calcium halophosphate phosphor, but like the calcium halophosphate phosphor, it has ultraviolet light with a wavelength of 400 ns or less. Since only 436r+g+ and 405 nm light is converted into visible light, mercury luminescent colors that do not contribute much to brightness or color rendering are wasted and emitted to the outside.
そこで、３波長域発光けい光体に青緑色成分のけい光体
や深赤色成分のけい光体を混合することにより、上記３
波長域発光けい光体で不足している領域の光を補い、演
色性を向上させる試みがなされている。Therefore, by mixing a phosphor with a blue-green component or a phosphor with a deep red component with a 3-wavelength band emitting phosphor, we can
Attempts have been made to supplement the light in the insufficient region with wavelength range emitting phosphors and improve color rendering properties.
（発明が解決しようとする課題）
しかしながら、上記３波長域発光けい光体に青緑色成分
のけい光体や深赤色成分のひい光体を混合して用いるよ
うにした従来の場合は、これら合計４種以上のけい光体
粉末を混合して単一のけい光体層を形成するものであっ
た。(Problem to be Solved by the Invention) However, in the conventional case where a phosphor that emits light in the three wavelength ranges is mixed with a phosphor that emits a blue-green component or a phosphor that emits a deep red component, the total amount of A single phosphor layer was formed by mixing four or more types of phosphor powders.
このような１層構造のけい光体被膜の場合、３波長域発
光けい光体に混入された青緑色成分のけい光体や深赤色
成分のけい光体が３波長域発光けい光体に達しようとす
る紫外線の一部を吸収してｎＪ視光に変換してしまう。In the case of such a single-layer phosphor coating, the blue-green component phosphor and the deep red component phosphor mixed into the 3-wavelength band emitting phosphor reach the 3-wavelength band emitting phosphor. It absorbs a portion of the ultraviolet rays that it attempts to absorb and converts them into nJ visible light.
すなわち、３波長域発光けい光体が紫外線を可視光に変
換する作用を阻害する。That is, the function of the three-wavelength band emitting phosphor to convert ultraviolet light into visible light is inhibited.
上記３波長域発光けい光体に加えられたけい光体は、紫
外線や、４３６ｎ＊および４０５ｎ−の水銀発光を特定
波長の可視光に変換するが、変換効率はあまり高くない
のでランプとしての光量が低下する。The phosphor added to the three-wavelength phosphor mentioned above converts ultraviolet light and mercury emission of 436n* and 405n- into visible light of a specific wavelength, but the conversion efficiency is not very high, so the amount of light as a lamp is limited. decreases.
このようなことから、３波長域発光けい光体に演色性向
上ためのけい光体を混合して単一のけい光体層を形成し
た場合は、高演色性は向上するものの、光束が大幅に低
下する不具合がある。For this reason, if a single phosphor layer is formed by mixing a 3-wavelength band emitting phosphor with a phosphor for improving color rendering, the color rendering will improve, but the luminous flux will be significantly reduced. There is a problem where the performance decreases.
このため、この種のけい光ランプは生鮭食品展示用など
のごとく使用分野が限られる不具合がある。For this reason, this type of fluorescent lamp has the disadvantage that its use is limited to areas such as displaying raw salmon food.
本発明においては、光束の低下を生じることなく演色性
に優れたけい光ランプを提供しようとするものである。The present invention aims to provide a fluorescent lamp with excellent color rendering properties without causing a decrease in luminous flux.
［発明の構成］
（課題を解決するための手段）
本発明の１番目においては、電極を備えたバルブの内面
に、水銀から放出される４３６ｎｍおよびそれ以下の水
銀発光を吸収してこれより長波長側の可視光を発するけ
い光体を主成分とする第１のけい光体層を形成し、この
第１のけい光体層の上に３波長域発光けい光体を主成分
とする第２のけい光体層を形成したことを特徴とする。[Structure of the Invention] (Means for Solving the Problems) In the first aspect of the present invention, the inner surface of a bulb equipped with an electrode absorbs mercury emission of 436 nm and shorter emitted from mercury, and absorbs mercury emission of wavelengths longer than 436 nm. A first phosphor layer whose main component is a phosphor that emits visible light on the wavelength side is formed, and a second phosphor layer whose main component is a phosphor that emits light in three wavelength ranges is formed on the first phosphor layer. It is characterized by forming two phosphor layers.
本発明の２番目は、上記第１のけい光体層を形成するけ
い光体を、青緑色発光けい光体および深赤色発光けい光
体の少なくとも１種で構成したことを特徴とする。A second aspect of the present invention is that the phosphor forming the first phosphor layer is composed of at least one of a blue-green emitting phosphor and a deep red-emitting phosphor.
そして本発明の３番目は、第１のけい光体層の色度と第
２のけい光体層の色度の差を、ｘｙ色度図座標上で Δ
Ｘ２＋Δｙ２≦０．０７の範囲に規制したことを特徴と
する。The third aspect of the present invention is to calculate the difference between the chromaticity of the first phosphor layer and the second phosphor layer by Δ on the xy chromaticity diagram coordinates.
It is characterized in that it is regulated within the range of X2+Δy2≦0.07.
（作用）
本発明の１番口によると、バルブの内面に形成されるけ
い光体層を、水銀から放出される４３６ｔｖおよびそれ
以下のスペクトルを吸収してこれより長波長側の可視光
を発するけい光体を主成分とする第１のけい光体層と、
この第１のけい光体層の上、つまりバルブと反対側の面
の放電空間側の面に形成された３波長域発光けい光体を
主成分とする第２のけい光体層とに別けて形成したので
、水銀から放出される発光の内生として２５４ ｎｍの
紫外線は最初に３波長域発光けい光体を主成分とする第
２のひい光体層により効果的に可視光に変換され、この
３波長域発光けい光体で変換されなかった４０５ｎｍや
４３６ｎｗおよびそれ以下の水銀発光は次の層の第１の
けい光体層にょって所定の領域のスペクトルに変換され
、よって可視光を補強するようになり、したがって演色
性が向上し、かつ第１のけい光体層が第２のけい光体層
により発光された可視光の透過を阻害しない程度にする
ことで光束の低下を防止することができる。(Function) According to the first aspect of the present invention, the phosphor layer formed on the inner surface of the bulb absorbs the spectrum of 436 tv and less emitted from mercury and emits visible light with longer wavelengths. a first phosphor layer containing a phosphor as a main component;
It is separated into a second phosphor layer whose main component is a phosphor that emits light in three wavelength ranges, which is formed on the first phosphor layer, that is, on the surface facing the discharge space on the opposite side from the bulb. As a result, the 254 nm ultraviolet rays emitted from mercury are first effectively converted into visible light by the second phosphor layer, which is mainly composed of a 3-wavelength phosphor. The 405nm, 436nw and lower mercury emission that was not converted by this three-wavelength band emitting phosphor is converted into a predetermined spectrum of spectrum by the next layer, the first phosphor layer, and thus visible light. The color rendering properties are improved, and the reduction in luminous flux is reduced by ensuring that the first phosphor layer does not inhibit the transmission of visible light emitted by the second phosphor layer. It can be prevented.
本発明の２番目によると、上記第１のけい光体層は、青
緑色発光けい光体およびまたは深赤色発光けい光体で構
成したので演色性がよくなる。According to the second aspect of the present invention, the first phosphor layer is composed of a blue-green emitting phosphor and/or a deep red-emitting phosphor, so that color rendering properties are improved.
そして本発明の３番目によると、第１のけい光体層の色
度と第２のけい光体層の色度の差を、ｘｙ色度図座標上
で１ｒ７７〒ＡＹ” ≦０．０７の範囲に規制したので
、第１のけい光体層および第２のけい光体層の膜厚のば
らつきから生じるランプ臼体から出る光色のばらつきが
小さくなり、色調の＃Ｊ整が容易になる。According to the third aspect of the present invention, the difference between the chromaticity of the first phosphor layer and the chromaticity of the second phosphor layer is expressed as 1r77〒AY''≦0.07 on the xy chromaticity diagram coordinates. Since it is regulated within the range, variations in the color of light emitted from the lamp body due to variations in the film thickness of the first phosphor layer and the second phosphor layer are reduced, making it easier to adjust the color tone. .
（実施例）
以下本発明について、図面に示す一実施例にもとづき説
明する。(Example) The present invention will be described below based on an example shown in the drawings.
第１図は４０Ｗの直管形けい光ランプを示し、１は直管
形のガラスバルブである。バルブ１は例えば管径が３２
．５ｍｍ、管長１１９８ｍｍ程度の大きさをなし、内部
に放電空間２を形成しである。FIG. 1 shows a 40W straight tube type fluorescent lamp, and 1 is a straight tube type glass bulb. For example, the valve 1 has a pipe diameter of 32 mm.
．． It has a size of about 5 mm and a tube length of 1198 mm, and has a discharge space 2 formed inside.
バルブ１の両端部はステム３．３で封止されており、こ
れらステム３．３にはフィラメント電極４．４が取付け
られている。Both ends of the bulb 1 are sealed by stems 3.3, to which filament electrodes 4.4 are attached.
バルブ１の端部には口金５．５が被着されており、これ
ら口金５．５にはそれぞれ上記電極４．４に接続された
口金ピン６・・・が突設されている。A cap 5.5 is attached to the end of the bulb 1, and each cap 5.5 has a protruding cap pin 6 connected to the electrode 4.4.
バルブ１の上記ｈｋ電空間２に面した内面にはけい光体
被膜が形成されている。A phosphor coating is formed on the inner surface of the bulb 1 facing the hk electric space 2 .
本発明におけるけい光体被膜は２層に別けて形成されて
おり、バルブ１の内面に接して第１のけい光体層７が形
成されているとともに、この上に、つまり第１のけい光
体層７の放電空間２側の面に第２のけい光体層８が積層
して形成されている。The phosphor coating according to the present invention is formed in two separate layers: a first phosphor layer 7 is formed in contact with the inner surface of the bulb 1, and a first phosphor layer 7 is formed on top of this, that is, a first phosphor layer 7 is formed in contact with the inner surface of the bulb 1. A second phosphor layer 8 is laminated on the surface of the body layer 7 on the discharge space 2 side.
第１のけい光体層７は、水銀から放出される４３５ｎｉ
や４０５ｔｖおよびそれ以下の発光スペクトルを吸収し
、これを長波長側の可視光に変換するけい光体からなる
もので、例えば青緑色発光けい光体および深赤色発光け
い光体の少なくとも１種で形成されている。The first phosphor layer 7 contains 435ni emitted from mercury.
It consists of a phosphor that absorbs the emission spectrum of 405 tv and below and converts it into visible light on the longer wavelength side, for example, it is made of at least one of a blue-green emitting phosphor and a deep red-emitting phosphor. It is formed.
青緑色発光けい光体としては、例えばユーロピウム付活
ホウリン酸ストロンチウムけい光体ｆ２ Ｓ ｒ Ｏ・
０．８４ Ｐ ２０５” ０．１６Ｂ２０．：Ｅｕｌや
ユーロピウム付活クロロリン酸バリウム・カルシウム・
マグネシウムけい光体（（Ｂａ。As the blue-green emitting phosphor, for example, europium-activated strontium borate phosphor f2 S r O.
0.84P 205" 0.16B20.:Eul or europium activated barium/calcium chlorophosphate/
Magnesium phosphor ((Ba.
Ｃａ、 Ｍｇ） １０（ＰＯ４） ｂ Ｃ１２： Ｅｕ
ｌまたはユーロピウム・マンガン付活アルミン酸バリウ
ム・マグネシウムけい光体（（Ｂａ、Ｍｇ）２Ａ ｌ
＋’６０２４： Ｅ ｕ−Ｍｎｌ などが有効である。Ca, Mg) 10(PO4) b C12: Eu
l or europium-manganese activated barium-magnesium aluminate phosphor ((Ba, Mg)2A l
+'6024: E u-Mnl etc. are valid.
また、深赤色発光けい光体としては、マンガン付活クロ
ロゲルマン酸マグネシウムけい光体（３，５Ｍｇ０−０
．５ＭｇＦｚ ・Ｇｅ０２Ｍ ｎ ）などが好適する。In addition, as a deep red-emitting phosphor, a manganese-activated magnesium chlorogermanate phosphor (3,5Mg0-0
．． 5MgFz .Ge02M n ) etc. are suitable.
上記第１のけい光体層７の上（内面側）に形成される第
２のけい光体層８は、３波長域発光けい光体を主成分と
するもので、３波長域発光ひい光体としては、従来と同
様に、４５Ｏｎｗ付近に発光ピーク波長を有する例えば
３ （Ｂａ、Ｍｇ）０．８ＡＩ□Ｏ，：Ｅｕなどのよう
な青色発光けい光体と、５４０■付近に発光ピーク波長
をＨする例えばＬａＰＯ４： Ｃｅ、Ｔｂなどの緑色発
光けい光体と、６１０ｎｍ付近に発光ピーク波長を有す
る例えばＹ２Ｏ３：Ｅｕなどのような赤色発光けい光体
の３種をＣ６して形成されている。The second phosphor layer 8 formed on the first phosphor layer 7 (on the inner surface side) is mainly composed of a phosphor that emits light in a three-wavelength range, and is a phosphor layer that emits light in a three-wavelength range. As with the conventional material, there is a blue-emitting phosphor such as 3 (Ba, Mg)0.8AI□O, :Eu, which has an emission peak wavelength around 45Onw, and a blue emission peak wavelength around 540Onw. It is formed by C6 of three types of phosphors: a green-emitting phosphor such as LaPO4:Ce, Tb, and a red-emitting phosphor such as Y2O3:Eu, which has an emission peak wavelength around 610 nm. .
なお、このバルブ１内には所定量の水銀とアルゴンガス
などの不活性ガスが封入されている。Note that a predetermined amount of mercury and an inert gas such as argon gas are sealed inside the bulb 1.
このような実施例の構成によると、ランプが点灯中には
放電により水銀蒸気が水銀特有の紫外線および可視光の
水銀発光を放出し、この水銀発光はけい光体被膜を励起
して可視光を発光させ、した−かってバルブ１の外には
ＭＳ ’ｆ３１光が放出される。According to the configuration of such an embodiment, when the lamp is lit, mercury vapor emits ultraviolet and visible light mercury emission peculiar to mercury due to discharge, and this mercury emission excites the phosphor coating to emit visible light. The MS'f31 light is emitted outside the bulb 1.
この場合、放電空間２に水銀蒸気から放射された水銀発
光はまず、この放電空間２に而している第２のけい光体
層８に入り、この第２のけい光体層８を構成している３
波長域発光けい光体を主成分とけい光体を励起して可視
光を発出させる。In this case, the mercury luminescence emitted from the mercury vapor into the discharge space 2 first enters the second phosphor layer 8 contained in the discharge space 2 and constitutes the second phosphor layer 8. 3
The wavelength range emitting phosphor is the main component and the phosphor is excited to emit visible light.
この場合、３波長域発光けい光体から出る光は、従来の
３波長けい光ランプと同様に、可視光の略全域に亘る光
を放出し、すなわち３原色混合の白色色となり演色性、
光束とも良好な特性を現出する。In this case, the light emitted from the 3-wavelength phosphor emits light covering almost the entire range of visible light, like a conventional 3-wavelength phosphor lamp, that is, it becomes a white color that is a mixture of the three primary colors, and has a color rendering property,
It exhibits good characteristics in terms of luminous flux.
このようにして３波長域発光けい光体よりなる第２のけ
い光体層８を通過して可視光に変換された光エネルギー
は、外側の第１のけい光体層７を透過する。The light energy thus passed through the second phosphor layer 8 made of a phosphor emitting in three wavelength ranges and converted into visible light is transmitted through the first phosphor layer 7 on the outside.
この時、上記第２のけい光体層８で既に変換されている
可視光はこの第１のけい光体層７を円滑に透過する。At this time, the visible light that has already been converted by the second phosphor layer 8 smoothly passes through the first phosphor layer 7.
そして、上記３波長域発光けい光体８で変換し切れなか
った水銀発光の内４３６ ｎｍ付近および４０５ ｎｍ
付近の光は、この第１のけい光体層７で吸収され、この
第１のけい光体層７で所定の領域の可視光を放出する。Of the mercury luminescence that could not be completely converted by the three wavelength band luminescent phosphor 8, the wavelengths around 436 nm and 405 nm
Nearby light is absorbed by this first phosphor layer 7, and this first phosphor layer 7 emits visible light in a predetermined region.
すなわち、この第１のけい光体層７が上記青緑色発光け
い光体の場合は青緑色の光を出し、また深赤色発光けい
光体の場合は赤色系の光を出す。That is, when the first phosphor layer 7 is the blue-green emitting phosphor described above, it emits blue-green light, and when it is a deep red-emitting phosphor, it emits red light.
このため、前記３波長域発光けい光体て放出される可視
光に、第１のけい光体層７で変換された光色が加味され
、演色性が向上する。Therefore, the light color converted by the first phosphor layer 7 is added to the visible light emitted by the three-wavelength band emitting phosphor, and the color rendering properties are improved.
このため、ランプから放出される光の光束を大幅に低下
させることなく演色性を向上させることができる。Therefore, color rendering properties can be improved without significantly reducing the luminous flux of light emitted from the lamp.
ちなみに、上記実施例とは逆に、バルブ１側に３波長域
発光けい光体を形成するとともに、放電空間２側に上記
演色性補強用けい光体を形成した場合は、水銀から放出
される光が演色性補強用けい光体で特定波長領域の可視
光に変換され、次の３波長域発光けい光体には、放電空
間側のけい光体層を通り抜けた時にごく弱められた紫外
線を含む可視光が入射するだけであるから、３波長域発
光けい光体の有する可視光変換能力を充分活用すること
ができず、この場合は演色性および光束ともに大幅に低
下する。Incidentally, in contrast to the above embodiment, if a 3-wavelength band emitting phosphor is formed on the bulb 1 side and the color rendering reinforcing phosphor is formed on the discharge space 2 side, mercury will emit light. The light is converted into visible light in a specific wavelength range by the color rendering reinforcing phosphor, and the next three wavelength range emitting phosphors receive extremely weakened ultraviolet light when it passes through the phosphor layer on the discharge space side. Since only the visible light contained therein is incident, the visible light conversion ability of the three-wavelength band emitting phosphor cannot be fully utilized, and in this case, both color rendering properties and luminous flux are significantly reduced.
上記実施例の場合について、実験した結果を説明する。The experimental results for the above embodiment will be explained.
ＦＬ４０Ｓ形のけい光ランプについて、下記表に示すよ
うな実験を行った。Experiments were conducted on the FL40S type fluorescent lamp as shown in the table below.
この実験は、第１のけい光体層７として前記した青緑色
発光けい光体および深赤色発光けい光体を種々組み合わ
せて用い、第２のけい光体層８として３波長域発光けい
光体を使用した場合のそれぞれ平均演色評価数Ｒａ、特
殊演色評価数の赤系Ｒ９および３波長域発光けい光体を
１層のみ形成した従来のけい光ランプに対する光束比な
らびに第１層と第２層の間の色度差について測定したも
のである。In this experiment, various combinations of the above-mentioned blue-green emitting phosphor and deep red emitting phosphor were used as the first phosphor layer 7, and a three-wavelength band emitting phosphor was used as the second phosphor layer 8. The average color rendering index Ra, the special color rendering index red R9, and the luminous flux ratio compared to a conventional fluorescent lamp with only one layer of 3-wavelength band emitting phosphor, and the first and second layers when using This is a measurement of the chromaticity difference between.
上記表中、品番６が３波長域発光けい光体を１層のみ形
成した従来のけい光ランプであり、当然節１のけい光体
層７は形成されていなく、光束比は１００である。In the above table, product number 6 is a conventional fluorescent lamp in which only one layer of a phosphor emitting light in a three-wavelength range is formed, and naturally the phosphor layer 7 of node 1 is not formed, and the luminous flux ratio is 100.
なお、この場合の色度は第３図に■で示されるように、
×ｙ色度座標上でｘ−０，３４５、ｙ＝０．３５５てあ
り、相関色温度は５０００にである。In addition, the chromaticity in this case is shown by ■ in Figure 3,
The xy chromaticity coordinates are x-0,345, y=0.355, and the correlated color temperature is 5000.
品番工ないし品番５に示されたランプはいづれも第１の
けい光体層７を備えており、上記品番６で示された従来
のランプに比べて、いづれも平均演色評価数Ｒａおよび
特殊演色評価数Ｒ９の向上が認められる。The lamps indicated by product numbers 5 through 5 are all equipped with a first phosphor layer 7, and each has a higher average color rendering index Ra and special color rendering index than the conventional lamp indicated by product number 6 above. An improvement in the evaluation number R9 is recognized.
また、上記表中、品番７は３波長域発光けい光体に青緑
色発光けい光体および深赤色発光けい光体を混合して１
層のけい光体被膜を形成した従来のけい光ランプであり
、この場合は品番６で示されたランプに比べて光束が著
しく低下することが判る。In addition, in the above table, product number 7 is a mixture of a three-wavelength band emitting phosphor, a blue-green emitting phosphor, and a deep red emitting phosphor.
This is a conventional fluorescent lamp with a layered phosphor coating, in which case it can be seen that the luminous flux is significantly reduced compared to the lamp designated by item number 6.
これに灯して、品番１ないし品番５に示されたランプは
いづれも光束が品番７に比べて大幅に増加しており、品
番６で示された従来のランプに比べても極端な低下がな
い。In light of this, all of the lamps shown in product numbers 1 to 5 have significantly increased luminous flux compared to product number 7, and have an extreme decrease in luminous flux compared to the conventional lamp shown in product number 6. do not have.
したがって、これら表の結果からも、本発明に該当する
品番１ないし品番５に示されたランプはいづれも演色性
が向上し、しかしながら大幅な光束の低下を生じること
はないことが理解できる。Therefore, from the results in these tables, it can be understood that the lamps shown in Product No. 1 to Product No. 5, which correspond to the present invention, all have improved color rendering properties, but do not suffer from a significant decrease in luminous flux.
第２図は、上記表中品番６で示された従来のランプと、
品番３のランプについての分光分布特性を示す。Figure 2 shows the conventional lamp indicated by product number 6 in the table above,
The spectral distribution characteristics of lamp No. 3 are shown.
品番６で示された従来のランプの場合は、破線で示す４
３６ｎ■付近および４０５ｎ−付近の水銀発光スペクト
ルが吸収できなかった。In the case of a conventional lamp indicated by part number 6, it is indicated by a dashed line
The mercury emission spectra around 36n■ and around 405n- could not be absorbed.
これに対し、図中実線で示す特性が品番３のランプ、つ
まり第１のけい光体層７として青緑色発光けい光体５
Ｑ ｗ ｔ％、深赤色発光けい光体５０ｗｔ％を使用し
、３波長域発光けい光体の第２のけい光体層８と組み合
わせたランプの分光分布であり、破線領域の発光強度が
補強されたものである。この結果、品番３のランプの演
色性向上が明白に確認された。On the other hand, the characteristic shown by the solid line in the figure is the lamp with product number 3, that is, the first phosphor layer 7 is a blue-green light emitting phosphor 5.
This is the spectral distribution of a lamp using Q w t%, 50 wt% of a deep red emitting phosphor, and combined with the second phosphor layer 8 of a 3-wavelength band emitting phosphor, and the emission intensity in the dashed line region is reinforced. It is what was done. As a result, it was clearly confirmed that the color rendering properties of the lamp No. 3 were improved.
なお、上記のように複数のけい光体を用いて紫外線を可
視光に麦化する場合、色調整が必要になる。In addition, when converting ultraviolet rays into visible light using a plurality of phosphors as described above, color adjustment is required.
光色はランプの使用条件により所望とする発光色が異な
るが、相関色温度が低いと一般的には暖かい感じを与え
、逆に相関色温度が高いと冷たい感じを与える。The desired light color varies depending on the usage conditions of the lamp, but a low correlated color temperature generally gives a warm feeling, and conversely, a high correlated color temperature gives a cold feeling.
よって、上記品番６で示された３波長けい光ランプの場
合、標準的な５０００にの相関色温度を得るように色調
整しである。Therefore, in the case of the three-wavelength fluorescent lamp shown in item number 6 above, the color should be adjusted to obtain a correlated color temperature of 5000, which is standard.
このようなランプに対し、上記第１のけい光体層７とし
て、青緑色発光けい光体および深赤色発光けい光体のい
づれか１つを用いた場合は、これにより相関色温度が標
準的な５０００によりも外れることになる。For such a lamp, if one of a blue-green-emitting phosphor and a deep-red-emitting phosphor is used as the first phosphor layer 7, this results in a correlated color temperature equal to that of the standard. It will be off by 5000.
この色度の差が大きいほど標準的な５０００にの相関色
温度に調整するのが困難になる。The greater the difference in chromaticity, the more difficult it becomes to adjust to the standard correlated color temperature of 5000.
各種けい光体のランプについて色度を測定し、これをｘ
ｙ色度座標上に表示したのが第３図に示されている。Measure the chromaticity of lamps with various phosphors and calculate this as x
FIG. 3 shows the display on the y chromaticity coordinate.
■は青緑色発光けい光体のみを用いて１層のけい光体被
膜のみを形成したランプの色度、■は深赤色発光けい光
体のみを用いて１層のけい光体被膜のみを形成したラン
プの色度、［相］は青緑色発光けい光体を５０ ｗ ｔ
％、深赤色発光けい光体５０ ｗ ｔ％を用いて１層の
けい光体被膜のみを１１３成したランプの色度、■は上
記表中品番６で示された３波長けい光ランプの色度、
■は上記表中品番１で示された第１層目を青緑色発光け
い光体で形成するとともに第２層目を３波長域発光けい
光体で形成したランプの色度、■は上記表中品番２で示
された第１層口を深赤色発光けい光体で形成するととも
に第２層目を３波長域発光けい光体で形成したランプの
色度、■は上記表中品番３で示された第１層口を青緑色
発光けい光体を５ Ｑ ｗ ｔ％と深赤色発光けい光体
５ Ｑ ｗ ｔ％とで形成するとともに第２層目を３波
長域発光けい光体で形成したランプの色度、をそれぞれ
示す。■ is the chromaticity of a lamp in which only one layer of phosphor coating is formed using only a blue-green emitting phosphor; ■ is the chromaticity of a lamp in which only one layer of phosphor coating is formed using only deep red emitting phosphor The chromaticity, [phase] of the lamp was 50 wt blue-green emitting phosphor.
%, chromaticity of a lamp with only one layer of phosphor coating using 50 wt% of deep red emitting phosphor, ■ is the color of the 3-wavelength fluorescent lamp indicated by product number 6 in the table above. ■ is the chromaticity of the lamp shown by product number 1 in the table above, in which the first layer is made of a blue-green emitting phosphor and the second layer is made of a 3-wavelength band emitting phosphor; The chromaticity of the lamp indicated by product number 2 in the above table is the chromaticity of the lamp in which the first layer is made of a deep red light-emitting phosphor and the second layer is made of a 3-wavelength band light emitting phosphor; ■ is the product number in the above table. The first layer indicated by 3 is formed of 5 Q w t% of a blue-green emitting phosphor and 5 Q w t% of a deep red emitting phosphor, and the second layer is formed of a 3-wavelength band emitting phosphor. The chromaticity of the lamp formed by the body is shown respectively.
■で示す品番６の３波長けい光ランプの場合は、前記し
た通り、相関色温度は標準的な５０００にであり、座標
上でｘ−０，３４５、ｙｍＱ、３５５の点に存在する。In the case of the three-wavelength fluorescent lamp with product number 6 indicated by (2), the correlated color temperature is the standard 5000, as described above, and it exists at the coordinates x-0,345, ymQ, 355.
この■に対する各ランプの色度のずれ、つまり偏差は夕
ｒＫコこ２ ＋ Ａ ｙ ２−で表され、この値を前記
表に示した。The deviation of the chromaticity of each lamp with respect to this (2) is expressed as 2 + A y 2-, and this value is shown in the table above.
第３図および上記表から、品番１−■および品番２−■
や、■、■および［相］のランプは、色度差Ｑｘ” ＋
Ａｙ’が大きく、したがって標準的な５０００にの相関
色温度に修正するのが難しい。From Figure 3 and the table above, product number 1-■ and product number 2-■
, ■, ■ and [phase] lamps have chromaticity difference Qx” +
Ay' is large and therefore difficult to correct to a standard correlated color temperature of 5000.
これに対し、品番３−■のランプは色度差Ａｘ” ＋Ａ
７’が小さいので５０００にの相関色温度に修正するの
が容易である。On the other hand, the lamp with product number 3-■ has a chromaticity difference Ax" +A
Since 7' is small, it is easy to correct the correlated color temperature to 5000.
特に品番５−■のランプは、青緑色発光けい光体と深赤
色発光けい光体に、色調整のために緑色発光けい光体を
混合して用いたもので、５０００Ｋに一番近く、色調整
がきわめて容易に行える。In particular, the lamp with product number 5-■ uses a mixture of a blue-green emitting phosphor, a deep red-emitting phosphor, and a green-emitting phosphor for color adjustment, and is closest to 5000K. Adjustment is extremely easy.
上記表からも明らかな通り、色度差 Ａｘ’ ＋Ａ７”は０．０７以下の範囲が良い。As is clear from the table above, the chromaticity difference Ax'+A7'' is preferably in the range of 0.07 or less.
したがって、 Ｊτｘ’ ＋Ａｙ” ≦０．０７ の条件を満足することが好ましい。therefore, Jτx’+Ay”≦0.07 It is preferable that the following conditions are satisfied.
なお、本発明は上記実施例の構成に制約されるものでは
ない。Note that the present invention is not limited to the configuration of the above embodiment.
すなわち、各けい光体は実施例に記載したけい光体に制
約されるものではなく、それぞれの特性を実現するけい
光体であれば実施可能である。That is, each phosphor is not limited to the phosphors described in the examples, but any phosphor that achieves the respective characteristics can be used.
また、本発明のけい光ランプは一般照明用に限らず、商
品展示用など種々の用途のランプに使用可能である。Furthermore, the fluorescent lamp of the present invention can be used not only for general illumination, but also for various purposes such as product display.
さらに、バルブは直管形に制約されず、屈曲形のもので
あってもよい。Further, the valve is not limited to a straight pipe shape, but may be a bent shape.
［発明の効果］
以上説明したように本発明によれば、バルブの内面に形
成されるけい光体層を、水銀から放出される４３６ｎ■
およびそれ以下の波長スペクトルを吸収してこれより長
波長側の可視光を発するけい光体からなる第１のけい光
体層と、この第１のけい光体層の上で放電空間側の面に
形成された３波長域発光けい光体を主成分とする第２の
けい光体層とに別けて形成したので、水銀から放出され
る紫外線は最初に３波長域発光けい光体を主成分とする
第２のけい光体層により効果的に可視光に変換され、こ
の３波長域発光けい光体で変換されなかった４３６ｎｍ
およびそれ以下の水銀発光が次の層の第１のけい光体層
によって所定領域のスペクトルを補強するように変換さ
れ、したがって演色性が向上するとともに、第１のけい
光体層が可視光の透過を阻害しないので光束の低下を防
止することができる。[Effects of the Invention] As explained above, according to the present invention, the phosphor layer formed on the inner surface of the bulb is made of 436n
and a first phosphor layer made of a phosphor that absorbs visible light on the longer wavelength side of the wavelength spectrum and emits visible light on the longer wavelength side; Since the ultraviolet rays emitted from mercury are formed separately from the second phosphor layer, which mainly consists of a 3-wavelength band-emitting phosphor, the ultraviolet rays emitted from mercury first The 436 nm wavelength that is not converted by this tri-wavelength emitting phosphor is effectively converted into visible light by the second phosphor layer.
The mercury emissions below and below are converted by the first phosphor layer of the next layer to reinforce the spectrum in a given region, thus improving the color rendering, and the first phosphor layer Since it does not inhibit transmission, it is possible to prevent a decrease in luminous flux.
図面は本発明の一実施例を示し、第１図はけい光ランプ
の断面図、第２図は相対分光分布の特性図、第３図はｘ
ｙ色度座標を示す図である。
１・・・バルブ、２・・・放電空間、４・・・電極、７
・・・第１のけい光体層、８・・・第２のけい光体層。The drawings show an embodiment of the present invention, in which Fig. 1 is a cross-sectional view of a fluorescent lamp, Fig. 2 is a characteristic diagram of relative spectral distribution, and Fig. 3 is a diagram of the relative spectral distribution.
FIG. 3 is a diagram showing y chromaticity coordinates. 1... Bulb, 2... Discharge space, 4... Electrode, 7
...first phosphor layer, 8...second phosphor layer.
Claims (3)
る４３６ｎｍおよびそれ以下の波長の水銀の発光スペク
トルを吸収して長波長側の可視光を発するけい光体を主
成分とする第１のけい光体層を形成し、この第１のけい
光体層の上に３波長域発光けい光体を主成分とする第２
のけい光体層を形成したことを特徴とするけい光ランプ
。(1) On the inner surface of the bulb equipped with electrodes, there is a first phosphor whose main component is a phosphor that absorbs the mercury emission spectrum of 436 nm and shorter wavelengths emitted from mercury and emits visible light on the longer wavelength side. A second phosphor layer is formed on the first phosphor layer, and a second phosphor layer is formed on the first phosphor layer.
A fluorescent lamp characterized by forming a phosphor layer.
緑色発光けい光体および深赤色発光けい光体の少なくと
も１種を含むことを特徴とする第１の請求項に記載のけ
い光ランプ。(2) The phosphor forming the first phosphor layer includes at least one of a blue-green emitting phosphor and a deep red-emitting phosphor. Fluorescent lamp.
の色度の差を、ｘｙ色度座標上でΔｘ＾２＋Δｙ＾２≦
０．０７の範囲にしたことを特徴とする第１または第２
の請求項に記載のけい光ランプ。(3) The difference between the chromaticity of the first phosphor layer and the second phosphor layer is expressed as Δx^2+Δy^2≦ on the xy chromaticity coordinates.
The first or second characterized in that the range is 0.07.
A fluorescent lamp according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8384290A JPH03283348A (en) | 1990-03-30 | 1990-03-30 | Fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8384290A JPH03283348A (en) | 1990-03-30 | 1990-03-30 | Fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03283348A true JPH03283348A (en) | 1991-12-13 |
Family
ID=13813964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8384290A Pending JPH03283348A (en) | 1990-03-30 | 1990-03-30 | Fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03283348A (en) |
-
1990
- 1990-03-30 JP JP8384290A patent/JPH03283348A/en active Pending
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