JPH0356584A - Fluorescent film for cathode ray tube and production thereof - Google Patents
Fluorescent film for cathode ray tube and production thereofInfo
- Publication number
- JPH0356584A JPH0356584A JP19184789A JP19184789A JPH0356584A JP H0356584 A JPH0356584 A JP H0356584A JP 19184789 A JP19184789 A JP 19184789A JP 19184789 A JP19184789 A JP 19184789A JP H0356584 A JPH0356584 A JP H0356584A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- particle phosphor
- small particle
- face plate
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000002245 particle Substances 0.000 claims abstract description 99
- 239000000049 pigment Substances 0.000 claims abstract description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 121
- 239000002002 slurry Substances 0.000 claims description 15
- 238000010894 electron beam technology Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 abstract 8
- 238000000034 method Methods 0.000 description 6
- 108010010803 Gelatin Proteins 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 4
- 239000012190 activator 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
- 238000000576 coating method Methods 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
- 229920005822 acrylic binder Polymers 0.000 description 3
- 239000001055 blue pigment Substances 0.000 description 3
- 239000001054 red pigment Substances 0.000 description 3
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000004020 luminiscence type Methods 0.000 description 2
- 238000007613 slurry method Methods 0.000 description 2
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium 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
- 229910052771 Terbium Inorganic materials 0.000 description 1
- UAHZTKVCYHJBJQ-UHFFFAOYSA-N [P].S=O Chemical compound [P].S=O UAHZTKVCYHJBJQ-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 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
- 239000011248 coating agent Substances 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
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 235000013799 ultramarine blue Nutrition 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
Abstract
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
入射面で光の散乱が起こり、反射率が高くなりやすい。[Prior Art] Since a phosphor film is an aggregate of phosphor fine particles, light scattering occurs on the light incident surface and the reflectance tends to increase.
したがって、外部から陰極線管のフェースプレートに入
射する入射光がフェ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。Therefore, light incident on 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、蛍男体からの発光が見やすくなり、コ
ントラストが丘上する。しかしながら、その半面、この
顔料によって蛍光体からの発光が吸収されるかまたは妨
＋：ｌ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. In such a pigmented phosphor, the attached pigment absorbs incident light of a color other than the same color as the pigment, making it easier to see the light emitted from the phosphor and increasing the contrast. However, on the other hand, the pigment absorbs or blocks the light emitted 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。[Problems 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、フェ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った。[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. It was discovered that the phosphor ratio was high, and the fluorescent film of the present invention was created.
本発明の蛍光膜は、陰極線管のフェースプレートの内面
に形成され、電子線照射側に分布された大粒子蛍光体と
、フェ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って、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 includes 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 median particle diameter ratio L of the large particle phosphor to the small particle phosphor (large particle phosphor/small particle phosphor) in a 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≦0.
It is characterized by a range of 9.
前記大粒子蛍光体の粒子径の中央値は好ましくは８〜１
５μｍ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 diameter of the large particle phosphor is preferably 8 to 1.
5 μm, and the median particle size of the small particle phosphor is preferably 3 to 6 μm.
また、前記粒子径中央値比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 size ratio 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Ｃ
ｄＳからなる群から選ばれた少なくとも１種を母体とし
、Ａｇ ｓ Ｃ ｕ ％ Ａ ｕからなる群から選ばれ
た少なくとも１種を付活剤とし、ＣＩ７％ ＩＳ Ｂｒ
、Ｆ ｓ Ａ Ｉ ｓ Ｇ ａ ｓ Ｉ ｎ ｓＴｌ
ｌＳＡｓ，Ｐｂ，Ｓｂ，Ｂｉ，ＳｎＳＢ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、Ｙ ２ ０ ２ Ｓ ，Ｇｄ２０２ Ｓ１
（ （Ｙ，Ｇｄ）２ ０２ Ｓ）Ｙ２０， Ｇｄ２０
ｘ及び（Ｙ，Ｇｄ）２ ０２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、ＳｍＳＤｙ，
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Ｚ
ｎ２ＳｉＯ４及び（（Ｚｎ，Ｃａ）］（ＰＯ４）２１か
らなる群から選ばれた少なくとも１種を母体とし、Ｍｎ
，ＡｓＳＢ，ＣｅＳＴｉ、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)S, and C.
At least one species selected from the group consisting of dS is used as a parent body, at least one species selected from the group consisting of Ag s Cu % Au is used as an activator, and CI7% IS Br
, F s A I s G a s I n sTl
Sulfide phosphor containing at least one member selected from the group consisting of lSAs, Pb, Sb, Bi, SnSB and Ce as a co-activator, Y202S, Gd202S1
((Y,Gd)2 02 S)Y20, Gd20
At least one selected from the group consisting of
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 Z
Mn
, AsSB, CeSTi, sb, and 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。Examples of the pigments attached to the particle surface of the small particle phosphor include cobalt aluminate blue pigment, ultramarine blue, cobalt aluminate green pigment, titanium cobalt zincate green pigment,
Pigments such as red pigment can be used. These blue, green, and red pigments are used in phosphors that emit the same colors.
また、フェ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れるが、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
光が顔料によっ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 Due to the fact that the luminescence of the large particle phosphor, which has higher brightness than the electron gun, is absorbed or blocked by the pigment, and the luminescence of the small particle phosphor on the electron gun side is small.
This is not practical because the overall brightness decreases. moreover,
Since the small particle phosphor has a larger surface area than the large particle phosphor that occupies 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広があり、
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層を形或し、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とフ
ェ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
るに至った。There are various ways to manufacture the fluorescent 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 second layer is formed on the first layer by applying a large particle phosphor in the same manner. A two-layer coating method is possible. However, this method complicates the manufacturing process and increases costs. Therefore, the present inventors discovered that when a fluorescent film is formed by a slurry method, a large amount of small particle phosphor is distributed on the face plate side, and based on such findings, the method of the present invention was completed.
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Ｍ製する工程、該スラリーを回転するフェー
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. 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. The present invention is characterized by comprising the steps of: manufacturing a slurry having a range of 100% by weight, applying the slurry onto a rotating face plate, and drying the applied slurry.
前記塗布工程におけるフェースプレートの回転数は１０
〜２０Ｏｒｐｍであることが好ましい。The number of rotations of the face plate in the coating process is 10
It is preferable that it is 20 Orpm.
（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
フェ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 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
フェ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。Furthermore, in the method for manufacturing a phosphor film of the present invention, larger particles in the phosphor slurry applied to the rotating face plate are subjected to a stronger centrifugal force than small particles, so that the small particles settle lower than the large particles. .
したがって、形成された蛍光膜は、フェースプレート側
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。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] EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples.
実施例ｌ
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二Ａ
ｇ青色発光蛍光体２０ｇに結合剤としてゼラチン０．１
ｇ及びポリアクリル酸０．０５．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２００ ｒ
ｐｍで遠心塗布法を用いて陰極線管のフェースプレー
ト上に塗布、乾燥し、蛍光膜を得た。Example 1 80 g of a large particle phosphor consisting of a ZnS:Ag blue-emitting phosphor with an average particle size of 9 μm and ZnS2A with an average particle size of 3 μm
g 20 g of blue-emitting phosphor and 0.1 g of gelatin as a binder.
g and polyacrylic acid 0.05. A phosphor slurry was prepared by mixing a pigmented small particle phosphor to which 3.0% by weight of a cobalt aluminate blue pigment was attached, polyvinyl alcohol, and ammonium dichromate. next,
This phosphor slurry is heated at a minimum of 10 rpm and a maximum of 200 rpm.
pm using a centrifugal coating method and dried on the face plate of a cathode ray tube to obtain a fluorescent film.
その断面図を第１図に示す。A sectional view thereof is shown in FIG.
第１図に示すように、フェースプレート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
ルバック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。Compared to conventional fluorescent films, the fluorescent film obtained in this way has
Contrast has increased by 3% and brightness has improved by 12%.
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 ７０．と、平均粒径４μｍのＺｎ
Ｓ ： Ｃｕ，Ａｕ，ＡＩ緑色発光蛍光体２０１ｒ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ン
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ェ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: Large particle phosphor made of Cu green-emitting phosphor 70. and Zn with an average particle size of 4 μm
S: A pigmented small particle phosphor in which 3.0% by weight of a cobalt aluminate green pigment is attached to the Cu, Au, AI green light-emitting phosphor 201r using the same gelatin and acrylic binder as in Example 1 as a binder; A phosphor slurry was prepared by mixing polyvinyl alcohol and ammonium dichromate. Next, this phosphor slurry was applied on the face plate of the cathode ray tube in the same manner as in Example 1.
It was dried to obtain a fluorescent 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 fluorescent film had a 3% increase in contrast and a 12% increase in brightness compared to conventional fluorescent films.
実施例３、
平均粒径８μｍのＹ２０２Ｓ：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Ｙ２ ０
２ Ｓ ： Ｅｕ赤色発光蛍光体’２ｏｇ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
用いてべんから顔料を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？合し、蛍光体スラリーを調製した。Example 3: 40 g of large-particle phosphor consisting of Y202S:Eu red-emitting phosphor with an average particle size of 8 μm and Y202S with an average particle size of 4 μm
2S: Pigmented small particle phosphor made by attaching 0.25% by weight of pigment to Eu red light-emitting phosphor '2og using the same gelatin and acrylic binder as in Example 1 as a binder, and polyvinyl alcohol. And ammonium dichromate? A phosphor slurry was prepared.
次に、この蛍光体スラリーを実施例１と同様にして陰極
線管のフェースプレート上に塗布、乾燥し、蛍光膜を得
た。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Ｙ２０■Ｓ ： Ｅｕ，Ｓｍ赤色発光
蛍光体からなる大粒子蛍光体６０．と、平均粒径５μｍ
のＧｄ２ ０２ Ｓ ： 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
陰極線管のフェースプレート上に塗布、乾燥し、蛍光膜
を得た。Example 4 Y20■S with an average particle size of 7 μm: Large particle phosphor 60 consisting of Eu, Sm red light emitting phosphor. and an average particle size of 5 μm
Gd202S: Pigmented small particle phosphor in which 0.2% by weight of red pigment was attached to 40 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７％上昇し、輝度が２０％も向上した。The resulting fluorescent film had a 7% increase in contrast and a 20% increase in brightness compared to conventional fluorescent 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１
２〜２０％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 7% and a brightness of 1% compared to conventional fluorescent films.
It rose by 2-20%.
［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. Also,
According to the method of the present invention, a fluorescent film with 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。FIG. 1 shows a sectional view of a fluorescent film showing one embodiment of the present invention.
Claims (2)
電子線照射側に分布された大粒子蛍光体と、フェースプ
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って、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。(1) Formed on the inner surface of the face plate of the cathode ray tube,
A phosphor film comprising a large particle phosphor distributed on the electron beam irradiation side and a small particle phosphor distributed on the face plate side and having a pigment attached to the particle surface, the large particle phosphor with respect to the small particle phosphor. Phosphor median particle diameter ratio L (large particle phosphor/
(small particle phosphor) is in the range of 1<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≦ Fluorescent film for cathode ray tubes in the range of 0.9.
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ェースプレート
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。(2) The median particle diameter ratio L (large particle phosphor/small particle phosphor) of the small particle phosphor with pigment attached to the particle surface and the small particle phosphor is in the range of 1<L≦5. a large particle phosphor, and the mixing weight ratio M of the small particle phosphor to the large particle phosphor (small particle phosphor/large particle phosphor) is 0.
．． A phosphor film for a cathode ray tube comprising the steps of preparing a phosphor slurry in the range of 1≦M≦0.9, applying the phosphor slurry onto a rotating face plate, and drying the applied slurry. Production method.
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 true JPH0356584A (en) | 1991-03-12 |
| JPH0529672B2 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) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08259941A (en) * | 1995-02-20 | 1996-10-08 | Lg Electron Inc | Red phosphor composition for color cathode-ray tube |
-
1989
- 1989-07-25 JP JP19184789A patent/JPH0356584A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08259941A (en) * | 1995-02-20 | 1996-10-08 | Lg Electron Inc | Red phosphor composition for color cathode-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0529672B2 (en) | 1993-05-06 |
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