JPH02155143A - Formation of fluorescent film - Google Patents
Formation of fluorescent filmInfo
- Publication number
- JPH02155143A JPH02155143A JP30928988A JP30928988A JPH02155143A JP H02155143 A JPH02155143 A JP H02155143A JP 30928988 A JP30928988 A JP 30928988A JP 30928988 A JP30928988 A JP 30928988A JP H02155143 A JPH02155143 A JP H02155143A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- green
- blue
- color
- grain diameter
- 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
- 230000015572 biosynthetic process Effects 0.000 title 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 19
- 108010043121 Green Fluorescent Proteins Proteins 0.000 abstract description 6
- 238000007581 slurry coating method Methods 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 229910052737 gold Inorganic materials 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 abstract 2
- 239000011796 hollow space material Substances 0.000 abstract 1
- 229910052709 silver Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 102000005840 alpha-Galactosidase Human genes 0.000 description 1
- 108010030291 alpha-Galactosidase Proteins 0.000 description 1
- 229940033685 beano Drugs 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 229910052844 willemite Inorganic materials 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はカラー受像管の蛍光膜形成方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for forming a fluorescent film for a color picture tube.
カラー受像管の蛍光膜は、従来、パネル内面に緑、青、
赤の各蛍光膜パターンを所定の位置関係をもって塗り分
けられており、この蛍光膜から所定の間隔をへたててシ
ャドウマスク、または、アパーチャーグリル等の色選択
用電極を取り付けることによって、緑、青、赤の各蛍光
膜パターンと照射電子ビーノ＼との対応付けが行なわれ
ている。Conventionally, the fluorescent film of a color picture tube has green, blue, and
Each red phosphor film pattern is painted with a predetermined positional relationship, and by attaching a color selection electrode such as a shadow mask or aperture grill at a predetermined distance from this phosphor film, green, The blue and red fluorescent film patterns are associated with the irradiated electronic beano.
このような蛍光膜パターンを形成する一般的な方法は、
パネル内面を清浄にした後、通称、下塗りと称する工程
がまず行なわれる。すなわち、パネル内面と蛍光体との
接着強度を確実なものとするためにポリビニルアルコー
ルを主成分とする液を塗布し、乾燥を行なう。A common method to form such a fluorescent film pattern is
After cleaning the inner surface of the panel, a process commonly called undercoating is first performed. That is, in order to ensure the adhesive strength between the inner surface of the panel and the phosphor, a liquid containing polyvinyl alcohol as a main component is applied and dried.
ついで、この下地の上に光照射に反応して水に不溶性と
なる物質、例えば、重クロム酸塩を水溶性高分子と混合
し、更に、緑色蛍光体粉体を懸濁させた蛍光体スラリー
を塗布し、乾燥させ、均一な膜を作る。Next, a phosphor slurry in which a substance that becomes water-insoluble in response to light irradiation, such as dichromate, is mixed with a water-soluble polymer, and green phosphor powder is suspended, is then placed on top of this base. Apply and dry to create a uniform film.
この膜をシャドウマスクを通して露光し、続いて、現象
を行なうことにより、緑の蛍光膜パターンを形成する。This film is exposed through a shadow mask, and then a phenomenon is performed to form a green fluorescent film pattern.
このような作業を繰り返して順次、青、赤の蛍光膜パタ
ーンを所定の配列にし作製する。By repeating such operations, blue and red fluorescent film patterns are sequentially formed in a predetermined arrangement.
しかしながら、このような方法によりカラー受像管の蛍
光膜を形成した場合、例えば、緑色の蛍光膜のパターン
を形成した後に、青色の蛍光膜パターンを形成した場合
には、先に形成した緑色の蛍光膜パターンにおける緑色
発光中に青色発光が若干伴われるといった現象を示すも
のがあった。However, when forming the fluorescent film of a color picture tube using this method, for example, when forming a blue fluorescent film pattern after forming a green fluorescent film pattern, the previously formed green fluorescent film In some cases, the green light emission in the film pattern was accompanied by a slight amount of blue light emission.
−殻内に言えば、緑、青、赤の三原色の蛍光膜の各々の
領域内に他色の蛍光体が混入し、いわゆる混色現象が発
生し、色純度の低下を招くといった問題があった。- Inside the shell, there was a problem in that phosphors of other colors were mixed into each area of the phosphor film for the three primary colors of green, blue, and red, causing a so-called color mixture phenomenon and resulting in a decrease in color purity. .
この混色現象の原因として種々の検討の結果、次の事が
判明した。As a result of various studies, the following was found to be the cause of this color mixing phenomenon.
すなわち、第２図に示すように、緑色の蛍光膜パターン
を形成する緑色蛍光体２の平均粒径を、次に塗布する青
色蛍光体１３の平均粒径よりも大きなものを用いた場合
には、緑色の蛍光膜１に青色蛍光体１３が混色する割合
が大きくなる。しかし青色蛍光体１３の平均粒径を緑色
蛍光体２の平均粒径より０．５〜２ ）ｔ ｍ大きい蛍
光体を使用した場合には、露光、現像後の緑色蛍光膜１
４に、混色がほとんど認められないことがわかった。That is, as shown in FIG. 2, when the average particle size of the green phosphor 2 forming the green phosphor film pattern is larger than the average particle size of the blue phosphor 13 to be applied next, , the ratio of color mixing of the blue phosphor 13 to the green phosphor film 1 increases. However, when using a phosphor whose average particle size of the blue phosphor 13 is 0.5 to 2) t m larger than the average particle size of the green phosphor 2, the green phosphor film 1 after exposure and development
4, it was found that almost no color mixture was observed.
これは、１色目に塗布する緑色蛍光体スラリーの緑色蛍
光体２の平均粒径が２色目に塗布する青色蛍光体１３の
平均粒径に比べ大きいと、１色目にできた緑色蛍光膜１
の空隙に２色目の青色蛍光体１３が混入してしまい、現
像を行なっても、１色目の緑色蛍光膜１の空隙の中に２
色目に塗布した青色蛍光体１３が残存し混色現象を生じ
させていることが判明した。This is because if the average particle size of the green phosphor 2 in the green phosphor slurry applied to the first color is larger than the average particle size of the blue phosphor 13 applied to the second color, the green phosphor film 1 formed in the first color
The blue phosphor 13 of the second color is mixed into the voids of the green phosphor film 1 of the first color.
It was found that the blue phosphor 13 applied to the color remained and caused a color mixture phenomenon.
第２色目の青色蛍光体１３の平均粒径が６．５μｍと緑
色蛍光体２の平均粒径７μｍよりも小さい場合には、緑
色蛍光膜１にできた空隙の中に青色蛍光体１３が入り込
み、露光、現像後の緑色蛍光膜１４に青色蛍光体１３が
残存し、混色が認められ蛍光膜の表示品位を低下させる
。When the average particle size of the second color blue phosphor 13 is 6.5 μm, which is smaller than the average particle size of the green phosphor 2 of 7 μm, the blue phosphor 13 enters the voids formed in the green phosphor film 1. The blue phosphor 13 remains on the green phosphor film 14 after exposure and development, causing color mixture and degrading the display quality of the phosphor film.
本発明の目的は、緑、青、赤蛍光体の混色のない表示品
位の高い蛍光膜が得られる蛍光膜形成方法を提供するこ
とにある。An object of the present invention is to provide a method for forming a phosphor film that can produce a phosphor film with high display quality without color mixing of green, blue, and red phosphors.
本発明は、パネル内面に蛍光体スラリーを塗布し蛍光膜
パターンを形成する工程を少なくとも２回くり返す工程
を有するカラー受像管の蛍光膜形成方法において、前記
蛍光体スラリーに用いる蛍光体の平均粒径が少なくとも
０．５〜２μｍ異なる小さい径から大きい径の蛍光体へ
と順次塗布する工程を含んで構成される。The present invention provides a method for forming a phosphor film for a color picture tube, which comprises repeating the steps of applying a phosphor slurry on the inner surface of a panel and forming a phosphor film pattern at least twice, with an average particle size of the phosphor used in the phosphor slurry. The method includes a step of sequentially applying the phosphor from a small diameter to a large diameter phosphor whose diameters differ by at least 0.5 to 2 μm.
次に、本発明の実施例について図面を参照して説明する
。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の第１の実施例の蛍光膜形成方法を説明
する断面図である。FIG. 1 is a sectional view illustrating a method of forming a fluorescent film according to a first embodiment of the present invention.
第１の実施例は、第１図に示すように、パネル７に第１
色目として、緑色蛍光体（ＺｎＳ：Ｃｕ、Ａｕ、Ａｌ２
）２の平均粒径を７７１ｍとし、緑色蛍光膜１を形成後
、第２色目に青色蛍光体（ＺｎＳ ：Ａｇ、ＣＩ＞ ３
の平均粒径を７．５μｍとして、青色蛍光体スラリー塗
布工程５、露光、現像工程６を経て、露光、現像後の緑
色蛍光膜４が得られる。In the first embodiment, as shown in FIG.
Green phosphor (ZnS: Cu, Au, Al2
) 2 with an average particle diameter of 771 m, and after forming the green phosphor film 1, a blue phosphor (ZnS:Ag, CI>3
The green phosphor film 4 after exposure and development is obtained through a blue phosphor slurry coating step 5 and an exposure and development step 6, with an average particle size of 7.5 μm.
ここでは、第１色目の緑色蛍光体２の平均粒径が、第２
色目の青蛍光体３の平均粒径よりも小さいため、緑色蛍
光膜１にできた空隙の中に、青色蛍光体３が入り込まず
、露光、現像後の緑色蛍光膜４に青色蛍光体３の混色が
ほとんど認められない。Here, the average particle size of the green phosphor 2 of the first color is
Since the average particle size of the blue phosphor 3 is smaller than the average particle size of the blue phosphor 3, the blue phosphor 3 does not enter into the voids formed in the green phosphor film 1, and the blue phosphor 3 does not enter the green phosphor film 4 after exposure and development. Almost no color mixing is observed.
以上の実施例は、第１色目、第２色目について説明した
ものであるが、もちろん第３色目についても同様の考え
が適用でき、第３色目の蛍光体の粒径よりもさらに大き
くすることで、混色を防止できることは言うまでもない
。The above embodiments have been explained for the first color and the second color, but of course the same idea can be applied to the third color, and by making the particle size of the phosphor of the third color even larger than that of the third color. Needless to say, color mixing can be prevented.
第２の実施例として、第１色目に残光性のある平均粒径
６μｍの緑色蛍光体（Ｚｎ２Ｓｉ０４：Ｍｎ、Ａｓ）、
第２色目に青色蛍光体として、Ｚｎ２５ｔ０４ ：Ｍｎ
、Ａｓ、Ｚｎ３ （ＰＯ４）２：Ｍｎ、ＺｎＳ ：Ａ
ｇ、Ｃ！２の３種類を混合した平均粒径６．５μｍの蛍
光体を用いて実験を行ったが、第１の実施例と同様、第
１色目の緑色蛍光体に第２色目の青色蛍光体が混色する
こともなく、同じ効果を得ることができた。As a second example, a green phosphor (Zn2Si04:Mn, As) having an afterglow property and an average particle size of 6 μm in the first color,
As the second color blue phosphor, Zn25t04:Mn
, As, Zn3 (PO4)2:Mn, ZnS:A
G, C! The experiment was conducted using a phosphor with an average particle size of 6.5 μm, which is a mixture of three types of 2, but as in the first example, the first color green phosphor and the second color blue phosphor were mixed. I was able to get the same effect without having to do anything.
本発明は以上説明したように、パネル内面に蛍光体スラ
リーを塗布し、蛍光膜パターンを形成する工程を少なく
とも２回くり返す工程よりなるカラー受像管の蛍光膜形
成方法において、蛍光体スラリーに用いる蛍光体の平均
粒径が少なくとも０．５〜２μｍ異なる小さい径から大
きい径の蛍光体と順次塗布することにより、混色現象を
防止し、表示品位の高い蛍光膜が得られる効果がある。As described above, the present invention is applied to a phosphor slurry in a method for forming a phosphor film for a color picture tube, which comprises repeating the steps of applying a phosphor slurry to the inner surface of a panel and forming a phosphor film pattern at least twice. By sequentially coating phosphors with average particle diameters different from small to large by at least 0.5 to 2 μm, color mixing phenomenon can be prevented and a phosphor film with high display quality can be obtained.
第１図は本発明の第１の実施例の蛍光膜形成方法を説明
する断面図、第２図は従来の蛍光膜形成方法の一例を説
明する断面図である。
１・・・緑色蛍光膜、２・・・緑色蛍光体、３，１３・
・・青色蛍光体、４．１４・・・露光、現像後の緑色蛍
光膜、５・・・青色蛍光体スラリー塗布工程、６・・・
露現像工程、
７・・・パネル。FIG. 1 is a sectional view illustrating a method for forming a fluorescent film according to a first embodiment of the present invention, and FIG. 2 is a sectional view illustrating an example of a conventional method for forming a phosphor film. 1... Green fluorescent film, 2... Green phosphor, 3,13.
... Blue phosphor, 4.14... Green fluorescent film after exposure and development, 5... Blue phosphor slurry coating step, 6...
Exposure and development step, 7...panel.
Claims (1)
形成する工程を少なくとも２回くり返す工程を有するカ
ラー受像管の蛍光膜形成方法において、前記蛍光体スラ
リーに用いる蛍光体の平均粒径が少なくとも０．５〜２
μｍ異なる小さい径から大きい径の蛍光体へと順次塗布
する工程を含むことを特徴とする蛍光膜形成方法。In a method for forming a phosphor film for a color picture tube, which comprises repeating the steps of applying a phosphor slurry on the inner surface of a panel and forming a phosphor film pattern at least twice, the average particle size of the phosphor used in the phosphor slurry is at least 0. .5-2
A method for forming a phosphor film, comprising a step of sequentially coating phosphors with diameters different by μm from small to large.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30928988A JPH02155143A (en) | 1988-12-06 | 1988-12-06 | Formation of fluorescent film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30928988A JPH02155143A (en) | 1988-12-06 | 1988-12-06 | Formation of fluorescent film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02155143A true JPH02155143A (en) | 1990-06-14 |
Family
ID=17991204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30928988A Pending JPH02155143A (en) | 1988-12-06 | 1988-12-06 | Formation of fluorescent film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02155143A (en) |
-
1988
- 1988-12-06 JP JP30928988A patent/JPH02155143A/en active Pending
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