JPH0529672B2 - - Google Patents
Info
- Publication number
- JPH0529672B2 JPH0529672B2 JP19184789A JP19184789A JPH0529672B2 JP H0529672 B2 JPH0529672 B2 JP H0529672B2 JP 19184789 A JP19184789 A JP 19184789A JP 19184789 A JP19184789 A JP 19184789A JP H0529672 B2 JPH0529672 B2 JP H0529672B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- particle phosphor
- small particle
- film
- particle
- 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 - Fee Related
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 132
- 239000002245 particle Substances 0.000 claims description 99
- 239000002002 slurry Substances 0.000 claims description 15
- 239000000049 pigment Substances 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- 239000012190 activator Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229910052688 Gadolinium Inorganic materials 0.000 description 4
- 108010010803 Gelatin Proteins 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- CRHLEZORXKQUEI-UHFFFAOYSA-N dialuminum;cobalt(2+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Co+2].[Co+2] CRHLEZORXKQUEI-UHFFFAOYSA-N 0.000 description 4
- 229920000159 gelatin Polymers 0.000 description 4
- 239000008273 gelatin Substances 0.000 description 4
- 235000019322 gelatine Nutrition 0.000 description 4
- 235000011852 gelatine desserts Nutrition 0.000 description 4
- 239000001056 green pigment Substances 0.000 description 4
- 229920002451 polyvinyl alcohol Polymers 0.000 description 4
- 239000001054 red pigment Substances 0.000 description 4
- 229920005822 acrylic binder Polymers 0.000 description 3
- 239000001055 blue pigment Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 2
- 229910052772 Samarium Inorganic materials 0.000 description 2
- 229910052771 Terbium Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007613 slurry method Methods 0.000 description 2
- 229910052727 yttrium Inorganic materials 0.000 description 2
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- UAHZTKVCYHJBJQ-UHFFFAOYSA-N [P].S=O Chemical compound [P].S=O UAHZTKVCYHJBJQ-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- NNSIWZRTNZEWMS-UHFFFAOYSA-N cobalt titanium Chemical compound [Ti].[Co] NNSIWZRTNZEWMS-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- -1 for example Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 235000013799 ultramarine blue Nutrition 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Luminescent Compositions (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、顔料付き蛍光体を利用した陰極線管
用蛍光膜及びその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a fluorescent film for a cathode ray tube using a pigmented phosphor and a method for manufacturing the same.
［従来の技術］
蛍光膜は、蛍光体微粒子の集合体であることか
ら、光の入射面での光の散乱が起こり、反射率が
高くなりやすい。したがつて、外部から陰極線管
のフエースプレートに入射する入射光がフエース
プレートと蛍光膜との界面で反射し、画面が白く
見える傾向がある。[Prior Art] Since a phosphor film is an aggregate of phosphor fine particles, light scattering occurs on the light incident surface, which tends to increase the reflectance. Therefore, incident light that enters the face plate of the cathode ray tube from the outside is reflected at the interface between the face plate and the fluorescent film, and the screen tends to appear white.
そこで、このような現象を防止するため、近
年、蛍光体粒子表面にその蛍光体の発光色と同色
の顔料を付着させた蛍光体が使用されている。こ
のような顔料付き蛍光体は、付着された顔料がそ
の顔料の色と同色以外の入射光を吸収するため、
蛍光体からの発光が見えやすくなり、コントラス
トが向上する。しかしながら、その半面、この顔
料によつて蛍光体からの発光が吸収されるかまた
は妨げられ、輝度が低下するという欠点が生ず
る。 Therefore, in order to prevent such a phenomenon, in recent years, phosphors have been used in which a pigment of the same color as the emission color of the phosphor is attached to the surface of the phosphor particles. Such pigmented phosphors absorb incident light other than the same color as the pigment, so
The light emitted from the phosphor becomes easier to see and the contrast improves. However, on the other hand, this pigment absorbs or blocks the emission of light from the phosphor, resulting in a reduction in brightness.
［発明が解決しようとする課題］
本発明は、上記事情を鑑みてなされたもので、
コントラストが良好であると共に高い輝度を有す
る蛍光膜を提供することを目的とする。[Problem to be solved by the invention] The present invention has been made in view of the above circumstances, and
An object of the present invention is to provide a fluorescent film having good contrast and high brightness.
また、本発明の他の目的は、コントラストが良
好であるとともに高い輝度を有する蛍光膜を簡単
に製造する方法を提供することである。 Another object of the present invention is to provide a method for easily manufacturing a fluorescent film having good contrast and high brightness.
［課題を解決するための手段］
本発明者らは、従来の顔料付き蛍光体を用いた
蛍光膜において、フエースプレート側の蛍光体が
電子銃側の蛍光体よりも外部からの入射光の吸収
率が高いことを見出だし、本発明の蛍光膜をなす
にいたつた。[Means for Solving the Problems] The present inventors have discovered that in a fluorescent film using a conventional pigmented phosphor, the phosphor on the face plate side absorbs more incident light from the outside than the phosphor on the electron gun side. They found that the phosphor ratio was high, and were able to create the phosphor film of the present invention.
本発明の蛍光膜は、陰極線管のフエーススプレ
ートの内面に形成され、電子線照射側に分布され
た大粒子蛍光体と、フエースプレート側に分布す
る粒子表面に顔料が付着された小粒子蛍光体とを
含む蛍光膜であつて、該小粒子蛍光体に対する該
大粒子蛍光体の粒子径中央値比Ｌ（大粒子蛍光
体／小粒子蛍光体）が１＜Ｌ≦５の範囲であり、
該大粒子蛍光体に対する該小粒子蛍光体の混合重
量比Ｍ（小粒子蛍光体／大粒子蛍光体）が0.1≦Ｍ
≦0.9の範囲であることを特徴とする。 The phosphor film of the present invention is formed on the inner surface of the face plate of a cathode ray tube, and consists of large particle phosphor distributed on the electron beam irradiation side and small particle phosphor with pigment attached to the particle surface distributed on the face plate side. a phosphor film comprising a phosphor, wherein the median particle diameter ratio L of the large particle phosphor to the small particle phosphor (large particle phosphor/small particle phosphor) is in the range of 1<L≦5;
The mixing weight ratio M of the small particle phosphor to the large particle phosphor (small particle phosphor/large particle phosphor) is 0.1≦M
It is characterized by being in the range of ≦0.9.
前記大粒子蛍光体の粒子径の中央値は好ましく
は８〜15μｍであり、小粒子蛍光体の粒子径の中
央値は好ましくは３〜6μｍである。 The median particle size of the large particle phosphor is preferably 8 to 15 μm, and the median particle size of the small particle phosphor is preferably 3 to 6 μm.
また、前記粒子径中央値Ｌは５を越えると、塗
布膜中の蛍光体の密度が不均一となり、輝度、コ
ントラストが劣化し、実用的でない。 Furthermore, if the median particle diameter L exceeds 5, the density of the phosphor in the coating film becomes non-uniform, the brightness and contrast deteriorate, and this is not practical.
本発明の蛍光膜を構成する大粒子蛍光体及び小
粒子蛍光体としては、一般的に用いられるどのよ
うな蛍光体を使用してもよく、例えば、ZnS、
（ZnCd）Ｓ及びCdSからなる群から選ばれた少な
くとも１種を母体とし、Ag、Cu、Auからなる群
から選ばれた少なくとも１種を付活剤とし、Cl、
Ｉ、Br、Ｆ、Al、Ga、In、Tl、As、Pb、Sb、
Bi、Sn、Ｂ及びCeからなる群から選ばれた少な
くとも１種を共付活剤とする硫化物蛍光体、
Y2O2S、Gd2O2S、｛（Ｙ、Gd）2O2S｝、Y2O3、
Gd2O3及び（Ｙ、Gd2）O2からなる群から選ばれ
た少なくとも１種を母体とし、Eu及びTbからな
る群から選ばれた少なくとも１種を共付活剤と
し、Sm、Dy、Tb及びPrからなる群から選ばれ
た少なくとも１種を共付活剤とする酸硫化物蛍光
体及び酸化蛍光体、及びZn2iO4及び｛（Zn、Ca）3
（PO4）2｝からなる群から選ばれた少なくとも１
種を母体とし、Mn、As、Ｂ、Ce、Ti、Sb及び
Biからなる群から選択された少なくとも１種を
共付活剤とする蛍光体等を１種または２種以上を
混合して使用することができる。 As the large particle phosphor and small particle phosphor constituting the phosphor film of the present invention, any commonly used phosphor may be used, such as ZnS,
(ZnCd) The matrix is at least one selected from the group consisting of S and CdS, the activator is at least one selected from the group consisting of Ag, Cu, and Au, and Cl,
I, Br, F, Al, Ga, In, Tl, As, Pb, Sb,
A sulfide phosphor containing at least one member selected from the group consisting of Bi, Sn, B and Ce as a co-activator;
Y 2 O 2 S, Gd 2 O 2 S, {(Y, Gd) 2 O 2 S}, Y 2 O 3 ,
At least one selected from the group consisting of Gd 2 O 3 and (Y, Gd 2 ) O 2 is used as a matrix, at least one selected from the group consisting of Eu and Tb is used as a co-activator, Sm, Dy , an oxysulfide phosphor and an oxidized phosphor containing at least one selected from the group consisting of Tb and Pr as a co-activator, and Zn 2 iO 4 and {(Zn, Ca) 3
(PO 4 ) 2 } at least one selected from the group consisting of
Seed is the mother body, Mn, As, B, Ce, Ti, Sb and
A phosphor having at least one selected from the group consisting of Bi as a co-activator can be used alone or in combination of two or more.
小粒子蛍光体の粒子表面に付着される顔料とし
ては、例えばアルミン酸コバルト青色顔料、群
青、アルミン酸コバルト緑色顔料、チタニウム亜
鉛酸コバルト緑色顔料、べんがら赤色顔料等の顔
料を使用することができる。これら青、緑、赤の
各顔料はこれらと同色を発光する蛍光体に各々用
いられる。 As the pigment attached to the particle surface of the small particle phosphor, for example, pigments such as a cobalt aluminate blue pigment, ultramarine blue, a cobalt aluminate green pigment, a titanium cobalt zincate green pigment, and a red pigment can be used. These blue, green, and red pigments are used in phosphors that emit the same colors.
また、フエースプレート側に顔料が付着された
蛍光体として大粒子蛍光体を配置し、電子銃側に
顔料が付着されない小粒子蛍光体を配置すること
も考えらるが、この場合、小粒子蛍光体に比べ輝
度の高い大粒子蛍光体の発光が顔料によつて吸収
されるかまたは妨げられること及び電子銃側の小
粒子蛍光体の発光が小さいことにより、全体的に
輝度が下がることから実用的でない。さらに、同
じ体積を占める大粒子蛍光体と、小粒子蛍光体と
では小粒子蛍光体の方が表面積が広いため、顔料
は小粒子蛍光体に付着される。 It is also possible to arrange a large particle phosphor as a phosphor to which pigment is attached on the face plate side, and a small particle phosphor to which no pigment is attached to the electron gun side, but in this case, the small particle phosphor This is not practical because the luminance of the large particle phosphor, which has higher luminance than the body, is absorbed or blocked by the pigment, and the luminance of the small particle phosphor on the electron gun side is small, resulting in a decrease in overall luminance. Not on point. Furthermore, since the small particle phosphor has a larger surface area than the large particle phosphor occupying the same volume, the pigment is attached to the small particle phosphor.
本発明の蛍光膜を製造するためには種々の方法
があり、例えば初めに小粒子蛍光体をスラリー法
を用いて塗布することにより第１層を形成し、次
に大粒子蛍光体を同様にして塗布することにより
第１層上に第２層を形成する二層塗布方法が考え
られる。しかしながら、この方法では、製造工程
が複雑になり、コストが高くなる。そこで本発明
者らは、スラリー法により蛍光膜を形成するフエ
ースプレート側に小粒子蛍光体が多く分布するこ
とを見出だし、この様な知見に基づき本発明の方
法を完成するに至つた。 There are various methods for manufacturing the phosphor film of the present invention. For example, a first layer is formed by first applying a small particle phosphor using a slurry method, and then a large particle phosphor is applied in the same manner. A two-layer coating method may be considered in which a second layer is formed on the first layer by coating. However, this method complicates the manufacturing process and increases costs. Therefore, the present inventors discovered that a large amount of small particle phosphor is distributed on the face plate side where a phosphor film is formed by the slurry method, and based on such findings, they completed the method of the present invention.
本発明の蛍光膜の製造方法は、粒子表面に顔料
が付着された小粒子蛍光体と、該小粒子蛍光体に
対する粒子径中央値比Ｌ（大粒子蛍光体／小粒子
蛍光体）が１＜Ｌ≦５の範囲である大粒子蛍光体
とを含み、かつ該大粒子蛍光体に対する該小粒子
蛍光体の混合重量比Ｍ（小粒子蛍光体／大粒子蛍
光体）が0.1≦Ｍ≦0.9の範囲であるスラリーを調
製する工程、該スラリーを回転するフエースプレ
ート上に塗布する工程及び塗布されたスラリーを
乾燥する工程を具備することを特徴とする。 The method for producing a phosphor film of the present invention is characterized in that a small particle phosphor having a pigment attached to the particle surface and a median particle diameter ratio L (large particle phosphor/small particle phosphor) for the small particle phosphor are 1<1. and a large particle phosphor in the range of L≦5, and the mixing weight ratio M (small particle phosphor/large particle phosphor) of the small particle phosphor to the large particle phosphor is 0.1≦M≦0.9. The present invention is characterized by comprising the steps of preparing a slurry having a surface area, applying the slurry onto a rotating face plate, and drying the applied slurry.
前記塗布工程におけるフエースプレートの回転
数は10〜200rpmであることが好ましい。 The rotation speed of the face plate in the coating step is preferably 10 to 200 rpm.
（作用）
本発明の蛍光膜において、この顔料付き小粒子
蛍光体はフエースプレート側に配置され、その顔
料と同色以外の入射光を効果的に吸収し、その結
果コントラストが改善される。また、大粒子蛍光
体は電子線照射側に配置されていて、効率良く発
光するため、膜全体にわたり高い輝度が得られ
る。(Function) In the phosphor film of the present invention, the pigmented small particle phosphor is placed on the face plate side and effectively absorbs incident light of a color other than the same color as the pigment, resulting in improved contrast. Further, the large particle phosphor is placed on the electron beam irradiation side and emits light efficiently, so that high brightness can be obtained over the entire film.
さらに、本発明の蛍光膜の製造方法において、
回転するフエースプレートに塗布された蛍光体ス
ラリー中の大粒子には小粒子より強い遠心力がか
かるため、小粒子は大粒子よりも下方に沈殿す
る。したがつて、形成された蛍光膜は、フエース
プレート側に顔料付小粒子蛍光体が、電子線照射
側に大粒子蛍光体が分布する。 Furthermore, in the method for manufacturing a fluorescent film of the present invention,
Since larger particles in the phosphor slurry applied to the rotating face plate are subjected to a stronger centrifugal force than small particles, the small particles settle lower than the large particles. Therefore, in the formed phosphor film, the pigmented small particle phosphor is distributed on the face plate side and the large particle phosphor is distributed on the electron beam irradiation side.
［実施例］
以下、実施例を示し、本発明を具体的に説明す
る。[Example] Hereinafter, the present invention will be specifically explained with reference to Examples.
実施例 １
平均粒径9μｍのZnS：Ag青色発光蛍光体から
なる大粒子蛍光体80ｇと、平均粒径3μｍのZnS：
Ag青色発光蛍光体20ｇに結合剤としてゼラチン
0.1ｇ及びポリアクリル酸0.05ｇを用いてアルミ
ン酸コバルト青色顔料を3.0重量％付着させた顔
料付小粒子蛍光体と、ポリビニルアルコールと、
重クロム酸アンモニウムとを混合し、蛍光体スラ
リーを調製した。次に、この蛍光体スラリーを最
小10rpm、最大200rpmで遠心塗布法を用いて陰
極線管のフエースプレート上に塗布、乾燥し、蛍
光膜を得た。その断面図を第１図に示す。Example 1 ZnS with an average particle size of 9 μm: 80 g of large particle phosphor made of Ag blue-emitting phosphor and ZnS with an average particle size of 3 μm:
20g of Ag blue-emitting phosphor with gelatin as a binder
Pigmented small particle phosphor to which 3.0% by weight of cobalt aluminate blue pigment is attached using 0.1g and 0.05g of polyacrylic acid, polyvinyl alcohol,
A phosphor slurry was prepared by mixing with ammonium dichromate. Next, this phosphor slurry was applied onto the face plate of a cathode ray tube using a centrifugal coating method at a minimum of 10 rpm and a maximum of 200 rpm, and dried to obtain a phosphor film. A sectional view thereof is shown in FIG.
第１図に示すように、フエースプレート１上に
形成された蛍光膜は、顔料付き小粒子蛍光体が多
く分布する小粒子蛍光体層２と、この小粒子蛍光
体層２上に形成された、大粒子蛍光体が多く分布
する大粒子蛍光体層３とから構成されている。通
常この大粒子蛍光体層３上にはメタルバツク４が
形成されている。 As shown in FIG. 1, the phosphor film formed on the face plate 1 consists of a small particle phosphor layer 2 in which a large amount of pigmented small particle phosphor is distributed, and a small particle phosphor layer 2 formed on this small particle phosphor layer 2. , and a large-particle phosphor layer 3 in which large-particle phosphor is largely distributed. Usually, a metal back 4 is formed on this large particle phosphor layer 3.
この様にして得られた蛍光膜は、従来の蛍光膜
に比べ、コントラストが３％上昇し、輝度が12％
も向上した。 The fluorescent film obtained in this way has a 3% increase in contrast and a 12% increase in brightness compared to conventional fluorescent films.
has also improved.
実施例 ２
平均粒径10μｍのZnS：Cu緑色発光蛍光体から
なる大粒子蛍光体70ｇと、平均粒径4μｍのZnS：
Cu、Au、Al緑色発光蛍光体20ｇに結合剤として
実施例１と同じゼラチン及びアクリルバイダーを
用いてアルミン酸コバルト緑色顔料を3.0重量％
付着させた顔料付小粒子蛍光体と、ポリビニルア
ルコールと、重クロム酸アンモニウムとを混合
し、蛍光体スラリーを調製した。次に、この蛍光
体スラリーを実施例１と同様にして陰極線管のフ
エースプレート上に塗布、乾燥し、蛍光膜を得
た。Example 2 ZnS with an average particle size of 10 μm: 70 g of large particle phosphor made of Cu green-emitting phosphor and ZnS with an average particle size of 4 μm:
3.0% by weight of cobalt aluminate green pigment was added to 20g of Cu, Au, Al green light-emitting phosphor using the same gelatin and acrylic binder as in Example 1 as a binder.
The attached pigmented small particle phosphor, polyvinyl alcohol, and ammonium dichromate were mixed to prepare a phosphor slurry. Next, this phosphor slurry was applied onto the face plate of a cathode ray tube in the same manner as in Example 1 and dried to obtain a phosphor film.
得られた蛍光膜は、従来の蛍光膜に比べ、コン
トラストが３％上昇し、輝度が12％も向上した。 The resulting phosphor film had a 3% increase in contrast and a 12% increase in brightness compared to conventional phosphor films.
実施例 ３
平均粒径8μｍのY2O2S：Eu赤色発光蛍光体か
らなる大粒子蛍光体40ｇと、平均粒径4μｍの
Y2O2S：Eu赤色発光蛍光体20ｇに結合剤として
実施例１と同様のゼラチン及びアクリルバインダ
ーを用いてべんがら顔料を0.25重量％付着させた
顔料付小粒子蛍光体と、ポリビニルアルコール
と、重クロム酸アンモニウムとを混合し、蛍光体
スラリーを調製した。次に、この蛍光体スラリー
を実施例１と同様にして陰極線管のフエースプレ
ート上に塗布、乾燥し、蛍光膜を得た。Example 3 40 g of large particle phosphor consisting of Y2O2S :Eu red light emitting phosphor with an average particle size of 8 μm and
Y 2 O 2 S: Pigmented small particle phosphor in which 0.25% by weight of red pigment was attached to 20 g of Eu red light-emitting phosphor using the same gelatin and acrylic binder as in Example 1 as a binder, and polyvinyl alcohol. A phosphor slurry was prepared by mixing with ammonium dichromate. Next, this phosphor slurry was applied onto the face plate of a cathode ray tube in the same manner as in Example 1 and dried to obtain a phosphor film.
得られた蛍光膜は、従来の蛍光膜に比べ、コン
トラストが５％上昇し、輝度が16％も向上した。 The resulting fluorescent film had a 5% increase in contrast and a 16% increase in brightness compared to conventional fluorescent films.
実施例 ４
平均粒径7μｍのY2O2S：Eu、Sm赤色発光蛍光
体からなる大粒子蛍光体60ｇと、平均粒径5μｍ
のGd2O2S：Eu赤色発光蛍光体40ｇに結合剤とし
て実施例１と同様のゼラチンとアクリルバインダ
ーを用いてべんがら顔料を0.2重量％付着させた
顔料付小粒子蛍光体と、ポリビニルアルコールと
重クロム酸アンモニウムとを混合し、蛍光体スラ
リーを調製した。次に、この蛍光体スラリーを実
施例１と同様にして陰極線管のフエースプレート
上に塗布、乾燥し、蛍光膜を得た。Example 4 60 g of large particle phosphor consisting of Y 2 O 2 S:Eu, Sm red-emitting phosphor with an average particle size of 7 μm and an average particle size of 5 μm
Gd 2 O 2 S: Pigmented small particle phosphor with 0.2% by weight of red pigment attached using the same gelatin and acrylic binder as in Example 1 as a binder to 40 g of Eu red light emitting phosphor, and polyvinyl alcohol. A phosphor slurry was prepared by mixing with ammonium dichromate. Next, this phosphor slurry was applied onto the face plate of a cathode ray tube in the same manner as in Example 1 and dried to obtain a phosphor film.
得られた蛍光膜は、従来の蛍光膜に比べ、コン
トラストが７％上昇し、輝度が20％も向上した。 The resulting phosphor film had a 7% increase in contrast and a 20% increase in brightness compared to conventional phosphor films.
以上、実施例１〜４に示すように本発明の蛍光
膜は、従来の蛍光膜に比べ、コントラストが３〜
７％、輝度が12〜20％も上昇した。 As shown in Examples 1 to 4, the fluorescent film of the present invention has a contrast of 3 to 3 compared to the conventional fluorescent film.
7%, and brightness increased by 12-20%.
［発明の効果］
以上説明したように、本発明によれば、コント
ラスト及び輝度共に優れた蛍光膜をを得ることが
できる。また、本発明の方法によれば、コントラ
スト、輝度共に優れた蛍光膜を簡単に製造するこ
とができる。[Effects of the Invention] As explained above, according to the present invention, a fluorescent film having excellent contrast and brightness can be obtained. Further, according to the method of the present invention, a fluorescent film having excellent contrast and brightness can be easily manufactured.
第１図は、本発明の一実施例を示す蛍光膜の断
面図を示す。
１……フエースプレート、２……顔料付き小粒
子蛍光体層、３……大粒子蛍光体層、４……メタ
ルバツク。
FIG. 1 shows a sectional view of a fluorescent film showing one embodiment of the present invention. 1...Face plate, 2...Pigmented small particle phosphor layer, 3...Large particle phosphor layer, 4...Metal bag.
Claims (1)
れ、電子線照射側に分布された大粒子蛍光体と、
フエースプレート側に分布する粒子表面に顔料が
付着された小粒子蛍光体とを含む蛍光膜であつ
て、該小粒子蛍光体に対する該大粒子蛍光体の粒
子径中央値比Ｌ（大粒子蛍光体／小粒子蛍光体）
が１＜Ｌ≦５の範囲であり、該大粒子蛍光体に対
する該小粒子蛍光体の混合重量比Ｍ（小粒子蛍光
体／大粒子蛍光体）が0.1≦Ｍ≦0.9の範囲である
陰極線管用蛍光膜。 ２ 粒子表面に顔料が付着された小粒子蛍光体
と、該小粒子蛍光体に対する粒子径中央値比Ｌ
（大粒子蛍光体／小粒子蛍光体）が１＜Ｌ≦５の
範囲である大粒子蛍光体とを含み、かつ該大粒子
蛍光体に対する該小粒子蛍光体の混合重量比Ｍ
（小粒子蛍光体／大粒子蛍光体）が0.1＜Ｍ≦0.9
の範囲である蛍光体スラリーを調製する工程、該
蛍光体スラリーを回転するフエースプレート上に
塗布する工程及び塗布されたスラリーを乾燥する
工程を具備する陰極線管用蛍光膜の製造方法。[Claims] 1. A large particle phosphor formed on the inner surface of the face plate of a cathode ray tube and distributed on the electron beam irradiation side;
A phosphor film comprising a small particle phosphor having a pigment attached to the particle surface distributed on the face plate side, the median particle diameter ratio L of the large particle phosphor to the small particle phosphor (large particle phosphor / small particle phosphor)
is in the range of 1<L≦5, and the mixing weight ratio M of the small particle phosphor to the large particle phosphor (small particle phosphor/large particle phosphor) is in the range of 0.1≦M≦0.9. Fluorescent film. 2 Small particle phosphor with pigment attached to the particle surface and median particle diameter ratio L for the small particle phosphor
(Large particle phosphor/small particle phosphor) includes a large particle phosphor in the range of 1<L≦5, and the mixing weight ratio M of the small particle phosphor to the large particle phosphor
(Small particle phosphor/large particle phosphor) is 0.1<M≦0.9
1. A method for producing a phosphor film for a cathode ray tube, comprising the steps of: preparing a phosphor slurry in the range of 1 to 3; applying the phosphor slurry onto a rotating face plate; and drying the applied slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19184789A JPH0356584A (en) | 1989-07-25 | 1989-07-25 | Fluorescent film for cathode ray tube and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19184789A JPH0356584A (en) | 1989-07-25 | 1989-07-25 | Fluorescent film for cathode ray tube and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0356584A JPH0356584A (en) | 1991-03-12 |
| JPH0529672B2 true JPH0529672B2 (en) | 1993-05-06 |
Family
ID=16281500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19184789A Granted JPH0356584A (en) | 1989-07-25 | 1989-07-25 | Fluorescent film for cathode ray tube and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0356584A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0150725B1 (en) * | 1995-02-20 | 1998-10-01 | 구자홍 | Red phosphor in color brown tube |
-
1989
- 1989-07-25 JP JP19184789A patent/JPH0356584A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0356584A (en) | 1991-03-12 |
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