JPH0629414B2 - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JPH0629414B2 JPH0629414B2 JP58080483A JP8048383A JPH0629414B2 JP H0629414 B2 JPH0629414 B2 JP H0629414B2 JP 58080483 A JP58080483 A JP 58080483A JP 8048383 A JP8048383 A JP 8048383A JP H0629414 B2 JPH0629414 B2 JP H0629414B2
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- point
- phosphor
- chromaticity
- europium
- 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.)
- Expired - Lifetime
Links
- -1 manganese-activated calcium Chemical class 0.000 claims description 29
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 27
- 229910052693 Europium Inorganic materials 0.000 claims description 25
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 229910052787 antimony Inorganic materials 0.000 claims description 6
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical group [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 21
- 239000011575 calcium Substances 0.000 description 21
- 229910052791 calcium Inorganic materials 0.000 description 21
- 230000004907 flux Effects 0.000 description 18
- 238000009877 rendering Methods 0.000 description 18
- 238000010586 diagram Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 239000002356 single layer Substances 0.000 description 3
- 230000005457 Black-body radiation Effects 0.000 description 2
- ZQBZAOZWBKABNC-UHFFFAOYSA-N [P].[Ca] Chemical compound [P].[Ca] ZQBZAOZWBKABNC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 235000000421 Lepidium meyenii Nutrition 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 101100513612 Microdochium nivale MnCO gene Proteins 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- OGPBJKLSAFTDLK-UHFFFAOYSA-N europium atom Chemical compound [Eu] OGPBJKLSAFTDLK-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000012902 lepidium meyenii Nutrition 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- DWDQAMUKGDBIGM-UHFFFAOYSA-N phosphanylidyneyttrium Chemical class [Y]#P DWDQAMUKGDBIGM-UHFFFAOYSA-N 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
- H01J61/44—Devices characterised by the luminescent material
Landscapes
- Luminescent Compositions (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は螢光ランプに関するものである。TECHNICAL FIELD OF THE INVENTION The present invention relates to a fluorescent lamp.
従来例の構成とその問題点 従来、演色性改善形螢光ランプとしては青色発光螢光
体、赤色発光螢光体をハロりん酸カルシウム螢光体に混
合したものが知られている。しかし、これらはランプの
分光パワー分布を基準光源の分光分布に合わすために、
視感効率の低い青色ないし赤色領域の発光エネルギーを
比較的多く必要とするのが原因でランプ光束が大きく低
下してしまうという欠点があった。Configuration of Conventional Example and Problems Thereof Conventionally, as a color rendering improvement type fluorescent lamp, a mixture of a blue light emitting phosphor and a red light emitting phosphor with a calcium halophosphate phosphor is known. However, in order to match the spectral power distribution of the lamp with the spectral distribution of the reference light source,
There is a drawback in that the luminous flux of the lamp is greatly reduced due to the fact that a relatively large amount of light emission energy in the blue or red region having low luminous efficiency is required.
一方近年、高い光束と高演色性とを両立させた、いわゆ
る三波長域発光形螢光ランプが開発され各方面で実用に
供されつつあるが、この螢光ランプに使用される螢光体
はすべて高価な稀土類螢光体であることから、ランプコ
ストがきわめて高く、用途が限定されてしまうという問
題を有している。この三波長域発光形螢光ランプは高効
率で高演色性という特長のほかに、５０００Ｋという新
しい色温度を採用したという特徴を有している。この新
しく採用された５０００Ｋという発色と前記高効率稀土
類螢光体の採用とにより、三波長域発光形螢光ランプは
従来の螢光ランプには見られないさわやかさ、白さをひ
きたてる白色感を与えるといわれている。前記５０００
Ｋという光色は大規模な視感テストの結果にもとづいて
決定されたものであり、その色度範囲はきわめて狭いこ
とが報告されている。On the other hand, in recent years, a so-called three-wavelength band emission type fluorescent lamp that has both a high luminous flux and a high color rendering property has been developed and is being put to practical use in various fields, but the fluorescent body used for this fluorescent lamp is Since they are all expensive rare earth fluorescent materials, they have a problem that the lamp cost is extremely high and the applications are limited. In addition to the features of high efficiency and high color rendering, this three-wavelength emission type fluorescent lamp has the feature of adopting a new color temperature of 5000K. Due to the newly developed color of 5000K and the use of the high-efficiency rare-earth fluorescent substance, the three-wavelength band emission type fluorescent lamp has a refreshing and white feeling that is not seen in conventional fluorescent lamps. It is said to give. 5000
The light color K is determined based on the result of a large-scale visual test, and it is reported that its chromaticity range is extremely narrow.
発明の目的 本発明は三波長域発光形螢光ランプと同じ光色を有し、
かつ前記ランプのもつさわやかさと、白さをひきたてる
白色感とを与える安価な螢光ランプを提供するものであ
る。OBJECT OF THE INVENTION The present invention has the same light color as a three-wavelength band fluorescent lamp,
Further, the present invention provides an inexpensive fluorescent lamp which gives the refreshingness of the lamp and the whiteness that brings out the whiteness.
発明の構成 本発明者らは前記三波長域発光形螢光ランプの有するさ
わやかさ、白さをひきたてる白色感について、その生ず
る理由について検討した結果、特に前記さわやかさと白
色感は新しく採用された５０００Ｋという色温度が大き
く作用していることを見い出した。すなわち、三波長域
発光形螢光ランプに用いられている稀土類螢光体以外の
螢光体でもって安価で効率の高い螢光体の採用で前記さ
わやかさと白色感を有する螢光ランプが実現できないか
どうか、既知の螢光体を用いてテストを行った。ところ
で、従来よりハロりん酸カルシウム螢光体が、高い効率
を有し、安価でかつその組成中のＦとＣｌの比およびＳ
ｂ，Ｍｎ量を変えることにより大幅に色度点を変えられ
ることは公知である。本発明者らはハロりん酸カルシウ
ム螢光体中のＦとＣｌの比およびＳｂ，Ｍｎ量を適当に
調整して三波長域発光形螢光ランプと同じ色度点を有す
るハロりん酸カルシウムを作製し、これを用いてランプ
を作製した上で視感テストを行った結果、三波長域発光
形螢光ランプに近いさわやかさと白さをひきたてる白色
度を有していることを見い出した。しかしながら、この
ランプ光束が三波長域発光形螢光ランプにくらべて２０
％以上も低下して暗く、同一本数の比較では照度が大幅
に低下するために、実用化は困難であることが見い出さ
れた。前記のさわやかさと白さをひきたてる白色感を保
持しつつ、ランプ光束を上げるには演色性も考慮に入れ
て検討しなければならない。本発明者らはアンチモンお
よびマンガン付活ハロりん酸カルシウムをベースとし
て、これに種々の螢光体を添加して演色性とランプ光束
の関係について実験を行った。その結果、ハロりん酸カ
ルシウム螢光体に基本的に不足している赤色発光螢光体
を添加するのが演色性の向上に最も効果的であることが
認められた。従来から知られている赤色発光螢光体には
４価マンガン付活フッ化ゲルマン酸マグネシウム、ユー
ロピウム付活バナジン酸イットリウム、ユーロピウム付
活りんバナジン酸イットリウム、それに三波長域発光形
螢光ランプに用いられているユーロピウム付活酸化イッ
トリウムが公知である。これらのうち、ランプ光束を大
きく低下させることなく演色性向上に効果のあるのは前
記４種の赤色発光螢光体の中で最も効率が高いユーロピ
ウム付活酸化イットリウムであることが実験の結果確認
された。しかしながら、３価ユーロピウム付活酸化イッ
トリウムは前記のように三波長域発光形螢光ランプに用
いられ、かつ螢光体コストは三色の螢光体の中で最も高
価なものであることから、大量に添加することはランプ
コストを大幅に引き上げてしまうために不可である。す
なわち、いかに少量のユーロピウム付活酸化イットリウ
ムで効率よく演色性を改善するかが重要な点である。そ
の方法の一例として、粒径の粗いユーロピウム付活酸化
イットリウムを使用して効率を上げることが提案されて
いる。一方、ハロりん酸カルシウム螢光体については従
来からの白色もしくは昼光色のハロりん酸カルシウム螢
光体にユーロピウム付活酸化イットリウムを添加して５
０００Ｋの色温度を有する螢光ランプを作製する方法が
ある。しかし、この方法による一番大きな問題点は大量
にユーロピウム付活酸化イットリウムを添加しないと、
５０００Ｋのランプが得られず、この場合にはランプコ
ストが大幅にアップしてしまうという問題があった。す
なわち、ハロりん酸カルシウムの色度点の選定がランプ
光束、演色性、さらにはランプコストに大きな影響を与
えることが判明した。Constitution of the Invention The inventors of the present invention have examined the reason why the refreshing feeling and whiteness of the three-wavelength emission type fluorescent lamp that bring out the whiteness of the fluorescent lamp have been examined. As a result, the refreshing feeling and the whiteness are newly adopted as 5000K. It was found that the color temperature had a great effect. That is, a fluorescent lamp having a refreshing and white feeling is realized by adopting a fluorescent material other than the rare earth fluorescent material used for the three-wavelength band emission type fluorescent lamp, which is inexpensive and highly efficient. A test was carried out with known phosphors to see if this was possible. By the way, conventionally, calcium halophosphate phosphors have high efficiency, are inexpensive, and have a ratio of F to Cl and S in their composition.
It is known that the chromaticity point can be significantly changed by changing the amounts of b and Mn. The present inventors have appropriately adjusted the ratio of F and Cl and the amounts of Sb and Mn in the calcium halophosphate phosphor to obtain calcium halophosphate having the same chromaticity point as the three-wavelength band emission type fluorescent lamp. As a result of making a lamp using this, and performing a visual test, it was found that the lamp has a brightness close to that of a three-wavelength emission type fluorescent lamp and a whiteness that brings out whiteness. However, the luminous flux of this lamp is 20 compared to that of a fluorescent lamp that emits light in three wavelength regions.
It has been found that it is difficult to put it into practical use because the illuminance is drastically reduced in the comparison of the same number. In order to increase the luminous flux of the lamp while maintaining the above-mentioned refreshing and whiteness that brings out whiteness, it is necessary to consider the color rendering property. The present inventors conducted experiments on the relationship between color rendering and lamp luminous flux based on antimony and manganese-activated calcium halophosphate as a base and adding various phosphors thereto. As a result, it was found that the addition of a red-emitting phosphor, which is basically insufficient, to the calcium halophosphate phosphor is most effective for improving the color rendering property. The conventionally known red light-emitting phosphors are used in tetravalent manganese-activated magnesium fluorogermanate, europium-activated yttrium vanadate, europium-activated yttrium phosphorus vanadate, and three-wavelength-range fluorescent lamps. Known europium-activated yttrium oxide is known. Of these, it was confirmed by experiments that it is the europium-activated yttrium oxide with the highest efficiency among the above four types of red light-emitting phosphors that has the effect of improving the color rendering properties without significantly reducing the luminous flux of the lamp. Was done. However, since trivalent europium-activated yttrium oxide is used in the three-wavelength band emission type fluorescent lamp as described above, and the fluorescent substance cost is the most expensive one among the three color fluorescent substances, It is not possible to add a large amount because it will significantly increase the lamp cost. That is, it is important how to improve the color rendering efficiently with a small amount of europium-activated yttrium oxide. As an example of the method, it has been proposed to use europium-activated yttrium oxide having a coarse particle size to increase the efficiency. On the other hand, regarding the calcium halophosphate phosphor, europium-activated yttrium oxide was added to a conventional white or daylight-colored calcium halophosphate phosphor to obtain 5
There is a method of making a fluorescent lamp with a color temperature of 000K. However, the biggest problem with this method is that unless a large amount of europium-activated yttrium oxide is added,
A 5000K lamp could not be obtained, and in this case, there was a problem that the lamp cost was significantly increased. That is, it was found that the selection of the chromaticity point of calcium halophosphate has a great influence on the luminous flux of the lamp, the color rendering properties, and further the lamp cost.
ところで、ランプ色温度が５０００Ｋという場合は、大
量生産時の色度点のばらつきと、視感評価で差異が認め
られない色度許容範囲とを考慮に入れてある一定の面積
を有する色度点管理範囲を設定したとき、この範囲内に
含まれるものすべてを含むと解釈される。前記色度点管
理範囲の表示は色差による表示が用いられ、一般にはジ
ャッド（Ｊｕｄｄ）によるＭＰＣＤとマッカダム（Ｍａ
ｃＡｄａｍ）によるＳＤＣＭ（Ｓｔａｎｄａｒｄ ｄｅ
ｖｉａｔｉｏｎ ｏｆ ｃｏｌｏｕｒ ｍａｔｃｈｉｎ
ｇ）がよく知られている。これら色差表示のうちどちら
が視感判定とよく一致するかについては後者のＭａｃＡ
ｄａｍのＳＤＣＭがよく一致するとの報告が多い。ＭＰ
ＣＤとＳＤＣＭの関係は色度図上の色度点の位置により
大きく左右されるが、１ＳＤＣＭは２ＭＰＣＤに相当す
るといわれている。ＭａｃＡｄａｍの色差表示は一般に
ｘｙ−座標系での偏差長円で表わされたものがよく知ら
れているが、正確に長円を書くのはむつかしいので、長
円が円になるように直交座標系を斜交座標系に変換した
ものが使用される。ＭａｃＡｄａｍによれば、この斜交
座標系においてターゲットの色度点許容範囲はターゲッ
トの色度点を中心とする半径が５ＳＤＣＭの円内であ
る。ただし、１ＳＤＣＭは、今問題としている５０００
Ｋ付近ではｘｙ−座標系で０．００１３（ｘ軸方向）〜
０．００２５（ｙ軸方向）に相当する。By the way, when the lamp color temperature is 5000 K, the chromaticity point having a certain area in consideration of the variation of the chromaticity point at the time of mass production and the chromaticity permissible range in which the difference in visual evaluation is not recognized. When the control range is set, it is interpreted as including all the items included in this range. The display of the chromaticity point management range uses a display based on color difference, and is generally MPCD by Judd and Macadam (Ma).
SDAM (Standard de by cAdam)
visualization of color matchin
g) is well known. Regarding which of these color difference displays matches the visual judgment well, the latter MacA
There are many reports that the SDMC of dam is in good agreement. MP
The relationship between CD and SDCM largely depends on the position of the chromaticity point on the chromaticity diagram, but it is said that 1SDCM corresponds to 2MPCD. It is well known that the color difference display of MacAdam is generally represented by an ellipse of deviation in the xy-coordinate system, but it is difficult to write an ellipse accurately, so that the ellipse becomes a circle in orthogonal coordinates. A system in which the system is converted to an oblique coordinate system is used. According to MacAdam, in this oblique coordinate system, the target chromaticity point allowable range is within a circle with a radius of 5SDCM centered on the target chromaticity point. However, 1SDCM is the current problem of 5000
0.0013 (x-axis direction) in the xy-coordinate system near K
This corresponds to 0.0025 (y-axis direction).
本発明の螢光ランプは、ランプにしたときの色度点がマ
ッカダムの偏差長円による色差表示を円に変換する斜交
ｘ−ｙ座標系において、中心の点が（ｘ＝０．３４６，
ｙ＝０．３６１）で半径が５ＳＤＣＭである円の前記点
が、この点と点（ｘ＝０．３３０，ｙ＝０．３６６）と
を結ぶ線分上を移動することにより得られる前記円の軌
跡の領域内にある単一組成のアンチモンおよびマンガン
付活ハロりん酸カルシウム螢光体と、ユーロピウム付活
酸化イットリウム螢光体とを混合してなる２成分系で、
かつ一層構造の螢光体膜を有する。The fluorescent lamp of the present invention has a central point (x = 0.346, in the oblique xy coordinate system in which the chromaticity point when converted into a lamp converts the color difference display by the McCadam's deviation ellipse into a circle.
The circle obtained by moving the point of a circle having y = 0.361) and a radius of 5SDCM on a line segment connecting this point and the point (x = 0.330, y = 0.366) A two-component system in which a single composition of antimony and manganese-activated calcium halophosphate phosphor within the region of the locus of is mixed with a europium-activated yttrium oxide phosphor,
Also, it has a single-layer fluorescent film.
実施例の説明 以下、図面を参照して本発明について詳細に説明する。Description of Embodiments Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図はＣＩＥｘｙ−色度図における三波長域発光形螢
光ランプの色度許容範囲を示したものである。Ｐは５Ｓ
ＤＣＭに相当する偏差長円を示し、Ｑはユーロピウム付
活酸化イットリウムのランプ色度点、Ｒは黒体輻射軌
跡、Ｓは色度点管理中心をそれぞれ示す。この図より本
発明の目的に使用することができるハロりん酸カルシウ
ム螢光体の色度点は線分ＳＱの延長上にあることがわか
る。FIG. 1 shows the chromaticity allowable range of the three-wavelength band emission type fluorescent lamp in the CIExy-chromaticity diagram. P is 5S
A deviation ellipse corresponding to DCM is shown, Q is a lamp chromaticity point of europium-activated yttrium oxide, R is a black body radiation locus, and S is a chromaticity point management center. From this figure, it can be seen that the chromaticity point of the calcium halophosphate phosphor that can be used for the purposes of the present invention lies on the extension of the line segment SQ.
第２図は第１図のＳ付近を拡大して斜交ｘｙ−座標系に
示したものである。第２図において、Ｕ点の色度点はｘ
が０．３３０，ｙが０．３３６であり、またＳ点の色度
点はｘが０．３４６，ｙが０．３６１であり、そしてＴ
点はＵ点とＳ点との間にある色度点を示す。FIG. 2 is an enlarged view of the vicinity of S in FIG. 1 in an oblique xy-coordinate system. In FIG. 2, the chromaticity point at point U is x
Is 0.330, y is 0.336, and the chromaticity point at point S is 0.346 for x, 0.361 for y, and T
The points indicate the chromaticity points between the points U and S.
次に第２図のＴ点の色度点を有する螢光体の製造方法を
示す。Next, a method for manufacturing a phosphor having a chromaticity point of point T in FIG. 2 will be described.
ＣａＨＰＯ４ ３２７０ｇ ＣａＣＯ３ １０２０ｇ ＣａＦ２ ２６６ｇ ＭｎＣＯ３ ６２ｇ Ｓｂ２Ｏ３ ８９ｇ ＮＨ４Ｃｌ ７７ｇ 上記材料をボールミルにて１時間混合した後、空気中に
おいて１２００℃で３時間焼成する。焼成完了後、粉砕
し、分級機により粒径が２μｍ以下のもの、および粒径
が２０μｍ以上のものを取り除いて所望の螢光体を得
る。CaHPO 4 3270 g CaCO 3 1020 g CaF 2 266 g MnCO 3 62 g Sb 2 O 3 89 g NH 4 Cl 77 g The above materials are mixed in a ball mill for 1 hour and then calcined in air at 1200 ° C. for 3 hours. After the firing is completed, the product is pulverized, and particles having a particle size of 2 μm or less and particles having a particle size of 20 μm or more are removed by a classifier to obtain a desired phosphor.
ところで、ハロりん酸カルシウム螢光体を主成分とし、
これにユーロピウム付活酸化イットリウムを混合した螢
光体膜を有する螢光ランプを用いて視感テストを行った
結果、三波長域発光形螢光ランプと大差のないさわやか
さと白さをひきたてる白色感が得られるのは昼光色とほ
ぼ同等以上の平均演色評価数Ｒａが７５を有し、かつ白
色の９０％以上のランプ光束を有することが必要である
ことが認められた。平均演色評価数Ｒａが７５を下まわ
るとランプ光束を白色と同等以上にしないと三波長域発
光形螢光ランプの有するさわやかさと白色感が得られ
ず、一方、ランプ光束が白色の９０％を下まわると、平
均演色評価数が８０以上でないと、三波長域発光形螢光
ランプの有するさわやかさと白色感が得られないことが
認められた。By the way, the main component is calcium halophosphate phosphor,
As a result of a visual test using a fluorescent lamp having a phosphor film in which europium-activated yttrium oxide is mixed, a whiteness that brings out a refreshing and whiteness that is not much different from that of a three-wavelength band emission type fluorescent lamp is obtained. It has been recognized that it is necessary to have an average color rendering index Ra of 75, which is almost equal to or higher than that of daylight color, and a lamp luminous flux of 90% or more of white. If the average color rendering index Ra is less than 75, the refreshing and white feeling of the three-wavelength band fluorescent lamp cannot be obtained unless the luminous flux of the lamp is equal to or more than white, while the luminous flux of the lamp is 90% of white. It was confirmed that if the average color rendering index was not less than 80, the refreshing feeling and whiteness of the three-wavelength band emission type fluorescent lamp could not be obtained.
上記のようにランプ光束、平均演色評価数と、さわやか
さ、白色感が得られるランプ光色との間には密接な関係
があることが判明したので、実験を行い、その結果を第
３図〜第５図に示す。第３図はユーロピウム付活酸化イ
ットリウム螢光体添加量と平均演色評価数との関係を、
第４図はユーロピウム付活酸化イットリウム螢光体添加
量とランプ色温度との関係を、第５図はユーロピウム付
活酸化イットリウム螢光体添加量とランプ光束との関係
をそれぞれ示す。As described above, it was found that there is a close relationship between the luminous flux of the lamp, the average color rendering index, and the color of the lamp light that gives a refreshing and white sensation. Therefore, an experiment was conducted, and the results are shown in FIG. It is shown in FIG. Figure 3 shows the relationship between the amount of europium-activated yttrium oxide phosphor added and the average color rendering index.
FIG. 4 shows the relationship between the addition amount of europium-activated yttrium oxide fluorescent substance and the lamp color temperature, and FIG. 5 shows the relationship between the addition amount of europium-activated yttrium oxide fluorescent substance and the lamp luminous flux.
これらから平均演色評価数を７５以上にするには第２図
における点Ｓのハロりん酸カルシウム螢光体ではユーロ
ピウム付活酸化イットリウムが０％で、点Ｔのハロりん
酸カルシウムでは約５％、点Ｕのハロりん酸カルシウム
では約１０％の添加で得られることが第３図に示されて
おり、一方第４図よりハロりん酸カルシウム螢光体の色
度点が点Ｓ，Ｔ，Ｕの順にユーロピウム付活酸化イット
リウムの量を増加させねばならないことが示されてお
り、さらに第５図からハロりん酸カルシウム螢光体の色
度点が点Ｓのものはそれ単独でランプ光束が白色の９０
％であり、ユーロピウム付活酸化イットリウムを添加す
るとランプ光束は白色の９０％を下まわってしまう。し
たがって、ランプ光束に関しては、ハロりん酸カルシウ
ム螢光体の色度点は点Ｓより左側にあれば白色の９０％
を下まわることはないことがわかる。From these, in order to increase the average color rendering index to 75 or more, the europium-activated yttrium oxide at the point S in FIG. 2 is 0% in the calcium halophosphate phosphor, and the calcium halophosphate at the point T is about 5%, It is shown in FIG. 3 that calcium halophosphate at point U can be obtained by adding about 10%, while from FIG. 4 the chromaticity points of the calcium halophosphate phosphor are points S, T and U. It has been shown that the amount of europium-activated yttrium oxide must be increased in the order of, and from Fig. 5 that the calcium halophosphate phosphor whose chromaticity point is point S is independent of that, the luminous flux of the lamp is white. 90 of
%, And when the europium-activated yttrium oxide is added, the luminous flux of the lamp falls below 90% of white. Therefore, regarding the luminous flux of the lamp, if the chromaticity point of the calcium halophosphate phosphor is on the left side of the point S, it is 90% of white.
It turns out that you can never go below.
以上を綜合して、ハロりん酸カルシウム螢光体の色度点
が点Ｓより右側にあるものは演色性の条件は満足する
が、ランプ光束は白色の９０％を下まわり、一方ハロり
ん酸カルシウム螢光体の色度点が点Ｕより左側にあるも
のはユーロピウム付活酸化イットリウムを１０％以上添
加しないと、平均演色評価数が７５をこえないのに対
し、ランプ光束は白色の９０％を下まわり、かつランプ
コストも大幅に上昇するという問題が生じるため、いず
れの場合も不適当であることが判明した。Combining the above, if the chromaticity point of the calcium halophosphate phosphor is to the right of point S, the condition of color rendering is satisfied, but the luminous flux of the lamp is less than 90% of white, while the halophosphoric acid If the chromaticity point of the calcium phosphor is on the left side of the point U, the average color rendering index does not exceed 75, but the luminous flux of the lamp is 90% white, unless europium-activated yttrium oxide is added at 10% or more. Therefore, it was found to be unsuitable in any case, since there is a problem that the lamp cost is significantly lower and the lamp cost is significantly increased.
したがって、ハロりん酸カルシウム螢光体の色度点は点
Ｓと点Ｕとの間のものが適していることが認められた。Therefore, it was confirmed that the chromaticity point of the calcium halophosphate phosphor is preferably between point S and point U.
以上の説明では本発明に用いることができるハロりん酸
カルシウム螢光体の色度点は点Ｓ，Ｔ，Ｕのように１点
で示したが、厳密には点Ｓと点Ｕとの間に中心をもつ半
径５ＳＤＣＭの円内にある色度点、すなわち第２図で示
した斜線領域と理解されたい。In the above description, the chromaticity point of the calcium halophosphate phosphor that can be used in the present invention is shown as one point such as points S, T, and U, but strictly speaking, it is between point S and point U. It should be understood as a chromaticity point within a circle of radius 5SDCM centered at, ie the shaded area shown in FIG.
発明の効果 以上説明したように、本発明は特定の色度範囲を有する
単一組成のアンチモンおよびマンガン付活ハロりん酸カ
ルシウム螢光体と、ユーロピウム付活酸化イットリウム
螢光体とを混合してなる２成分系で、かつ一層構造の螢
光体膜を用いることにより、三波長域発光形螢光ランプ
と同じ光色を有し、かつこの螢光ランプのもつさわやか
さと、白さをひきたてる白色感（光色が昼白色）とを得
ることができるとともに、三波長域発光形螢光ランプに
比してコストを約1/2と低減することができ、またアン
チモンおよびマンガン付活ハロりん酸カルシウム螢光体
が単一組成であり、しかも前記２成分系螢光体からなる
螢光体膜が一層構造であるので、作業性がよく、安定性
にもすぐれているという効果を有する螢光ランプを提供
することができるものである。As described above, the present invention is a mixture of a single composition of antimony and manganese-activated calcium halophosphate phosphor having a specific chromaticity range, and a europium-activated yttrium oxide phosphor. By using a two-component fluorescent film with a single-layer structure, it has the same light color as that of a three-wavelength band fluorescent lamp, and the whiteness that brings out the freshness and whiteness of this fluorescent lamp. It is possible to obtain the feeling (light color is neutral white), and the cost can be reduced to about 1/2 as compared with the three-wavelength band emission type fluorescent lamp, and antimony and manganese activated halophosphoric acid can be obtained. Since the calcium phosphor has a single composition and the phosphor film composed of the two-component phosphor has a single-layer structure, it has good workability and excellent stability. Providing a lamp Is something that can be done.
第１図はｘｙ−色度図における三波長域発光形螢光ラン
プの色度許容範囲の一例を示す図、第２図は本発明に用
いるハロりん酸カルシウム螢光体の色度許容範囲を示す
図、第３図はユーロピウム付活酸化イットリウム添加量
と平均演色評価数Ｒａとの関係を示す図、第４図はユー
ロピウム付活酸化イットリウム添加量とランプ色温度と
の関係を示す図、第５図はユーロピウム付活酸化イット
リウム添加量とランプ光束（相対値）との関係を示す図
である。 Ｐ……色度許容範囲、Ｓ……色度点中心、Ｑ……ユーロ
ピウム付活酸化イットリウムのランプ色度点、Ｒ……黒
体輻射軌跡、Ｓ，Ｔ，Ｕ……ハロりん酸カルシウム螢光
体のランプ色度点。FIG. 1 is a diagram showing an example of the chromaticity permissible range of a three-wavelength band emission type fluorescent lamp in an xy-chromaticity diagram, and FIG. 2 is the chromaticity permissible range of the calcium halophosphate phosphor used in the present invention. Fig. 3, Fig. 3 is a diagram showing the relationship between the addition amount of europium-activated yttrium oxide and the average color rendering index Ra, and Fig. 4 is a diagram showing the relationship between the addition amount of europium-activated yttrium oxide and the lamp color temperature. FIG. 5 is a diagram showing the relationship between the addition amount of europium-activated yttrium oxide and the luminous flux of the lamp (relative value). P ... allowable range of chromaticity, S ... center of chromaticity point, Q ... lamp chromaticity point of europium-activated yttrium oxide, R ... black body radiation locus, S, T, U ... calcium halophosphate Lamp chromaticity point of the light body.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高野 治 大阪府門真市大字門真1006番地 松下電子 工業株式会社内 (72)発明者 高橋 睦夫 大阪府門真市大字門真1006番地 松下電子 工業株式会社内 (56)参考文献 特開 昭56−74174（ＪＰ，Ａ) 特開 昭56−102058（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Osamu Takano 1006 Kadoma, Kadoma, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd. (72) Mutsuo Takahashi 1006 Kadoma, Kadoma City, Osaka Matsushita Electronics Industrial Co., Ltd. 56) References JP 56-74174 (JP, A) JP 56-102058 (JP, A)
Claims (1)
偏差長円による色差表示を円に変換する斜交ｘ−ｙ座標
系において、中心の点が（ｘ＝０．３４６，ｙ＝０．３
６１）で半径が５ＳＤＣＭである円の前記点が、この点
と点（ｘ＝０．３３０，ｙ＝０．３６６）とを結ぶ線分
上を移動することにより得られる前記円の軌跡の領域内
にある単一組成のアンチモンおよびマンガン付活ハロり
ん酸カルシウム螢光体と、ユーロピウム付活酸化イット
リウム螢光体とを混合してなる２成分系で、かつ一層構
造の螢光体膜を有することを特徴とする螢光ランプ。1. An oblique xy coordinate system in which a chromaticity point when converted to a lamp is converted into a circle by a color difference display based on the McCadam's deviation ellipse, the center point is (x = 0.346, y = 0). .3
The area of the locus of the circle obtained by moving the point of the circle whose radius is 5SDCM in 61) on the line segment connecting this point and the point (x = 0.330, y = 0.366) A two-component system consisting of a mixture of a single composition of antimony and manganese-activated calcium halophosphate phosphor and a europium-activated yttrium oxide phosphor, and having a single-layered phosphor film A fluorescent lamp that is characterized by that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58080483A JPH0629414B2 (en) | 1983-05-09 | 1983-05-09 | Fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58080483A JPH0629414B2 (en) | 1983-05-09 | 1983-05-09 | Fluorescent lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59205146A JPS59205146A (en) | 1984-11-20 |
| JPH0629414B2 true JPH0629414B2 (en) | 1994-04-20 |
Family
ID=13719520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58080483A Expired - Lifetime JPH0629414B2 (en) | 1983-05-09 | 1983-05-09 | Fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0629414B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3322225B2 (en) * | 1998-03-24 | 2002-09-09 | 松下電器産業株式会社 | Discharge lamps and lighting equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS609541B2 (en) * | 1979-09-13 | 1985-03-11 | 松下電工株式会社 | High efficiency phosphor composition |
| US4315192A (en) * | 1979-12-31 | 1982-02-09 | Westinghouse Electric Corp. | Fluorescent lamp using high performance phosphor blend which is protected from color shifts by a very thin overcoat of stable phosphor of similar chromaticity |
-
1983
- 1983-05-09 JP JP58080483A patent/JPH0629414B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59205146A (en) | 1984-11-20 |
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