JPH02199747A - Color cathode-ray tube - Google Patents
Color cathode-ray tubeInfo
- Publication number
- JPH02199747A JPH02199747A JP1612089A JP1612089A JPH02199747A JP H02199747 A JPH02199747 A JP H02199747A JP 1612089 A JP1612089 A JP 1612089A JP 1612089 A JP1612089 A JP 1612089A JP H02199747 A JPH02199747 A JP H02199747A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- electron beam
- film
- shadow mask
- gun side
- 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
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000010894 electron beam technology Methods 0.000 claims abstract description 19
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 10
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 229910052788 barium Inorganic materials 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- 229910052797 bismuth Inorganic materials 0.000 claims 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims 1
- 229910052718 tin Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 239000004411 aluminium Substances 0.000 abstract 2
- 230000035699 permeability Effects 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000003086 colorant Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- -1 silver Chemical compound 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- JOSWYUNQBRPBDN-UHFFFAOYSA-P ammonium dichromate Chemical compound [NH4+].[NH4+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O JOSWYUNQBRPBDN-UHFFFAOYSA-P 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は、局部的に高輝度な画面表示をさせても色純度
劣化を生じないシャドウマスク方式カラー陰極線管に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a shadow mask type color cathode ray tube that does not cause deterioration in color purity even when locally displayed on a screen with high brightness.
[従来の技術]
シャドウマスク方式のカラー陰極線管では、W子銃から
射出された電子ビームのうち、シャドウマスクの孔を通
り抜けて螢光体を励起する電子は比較的少なく1.残り
の多数の電子はシャドウマスクに衝突して其の運動エネ
ルギーをシャドウマスクに与えて温度を上昇させる。シ
ャドウマスクの放熱は放射と伝導によって行われる。[Prior Art] In a shadow mask type color cathode ray tube, of the electron beam emitted from the W gun, relatively few electrons pass through the holes in the shadow mask and excite the phosphor.1. The remaining large number of electrons collide with the shadow mask and impart their kinetic energy to the shadow mask, increasing its temperature. Heat dissipation from the shadow mask is achieved by radiation and conduction.
大形で明るい画面が好まれているが、大面積のシャドウ
マスクの内側で、明るい画面を表示するための高エネル
ギーの多量の電子が衝突すれば、そこは高温になってし
まう、また、高精細度の表示を行うには、シャドウマス
クに細かいピッチで小さい孔を開けなければならないが
、そのためにはシャドウマスクの板厚はなるべく薄い方
が良い。Large, bright screens are preferred, but if a large amount of high-energy electrons collide inside a large-area shadow mask to display a bright screen, the area will become hot. In order to display high definition, it is necessary to make small holes in the shadow mask at a fine pitch, and for this purpose, it is better for the thickness of the shadow mask to be as thin as possible.
従って、大画面の明るい表示、高精細度で明るく見易い
表示の場合、シャドウマスクの伝導による放熱は困難に
なり、中央に近い個所の温度は高くなる、シャドウマス
クの温度が全体として平均的に上昇し、−様に膨張する
場合に対しては、シャドウマスク保持部に種々の工夫を
こらした対策が講じられており、一応の成果を得ている
が、画面の表示に局部的に特に明るい部分がある場合は
、シャドウマスクの対応する部分での発熱、それによる
温度上昇が大きく、そのためにシャドウマスクには局部
的に特に大きく熱膨張する所謂ドーミング現象が生ずる
。ドーミングの対策として、シャドウマスクの材料に、
熱膨張率の低いアンバー(商品名)を使用することが例
えば特開昭62−31925号公報等に開示されている
が、硬くて加工が困難とか、その表面に黒化膜を形成さ
せ難いとかの問題が生じている。Therefore, in the case of a bright display on a large screen or a high-definition, bright and easy-to-see display, it becomes difficult for the shadow mask to dissipate heat through conduction, and the temperature near the center increases, and the temperature of the shadow mask increases on average as a whole. However, in the case where the shadow mask holder expands in a negative manner, various measures have been taken for the shadow mask holding part, and some results have been achieved. If this occurs, the corresponding portion of the shadow mask generates a large amount of heat, resulting in a large temperature rise, which causes a so-called doming phenomenon in which the shadow mask locally expands significantly. As a countermeasure against doming, as a shadow mask material,
For example, Japanese Patent Application Laid-Open No. 62-31925 discloses the use of Amber (trade name), which has a low coefficient of thermal expansion, but it is hard and difficult to process, and it is difficult to form a blackened film on its surface. A problem has arisen.
[発明が解決しようとする課題]
シャドウマスクのドーミングが生ずると、ある特定色の
螢光体のドツト又はストライプに射突して励起させるべ
き電子ビームの一部が、隣接する他色の螢光体のドツト
又はストライプに射突して励起させてしまうようになる
。即ち、ドーミングによって1色純度不良が生ずる。[Problem to be Solved by the Invention] When doming of the shadow mask occurs, a part of the electron beam that should be excited by impinging on a dot or stripe of a phosphor of a certain color is caused by adjacent phosphor of another color. It hits the dots or stripes on the body and excites them. That is, doming causes one color purity defect.
本発明は、たとえシャドウマスクのドーミングが生じて
も、色純度不良の発生を抑制できるようにしたカラー陰
極線管を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a color cathode ray tube that can suppress the occurrence of poor color purity even if doming of a shadow mask occurs.
[課題を解決するための手段]
上記目的を達成するために本発明においては、各色螢光
体をドツト状またはストライブ状にして配列した螢光体
膜の電子銃側にアルミニウム膜を形成させてあるシャド
ウマスク形カラー陰極線管において、前記螢光体膜の隣
接する異色螢光体のドツト又はストライプの中間の境界
領域個所の電子銃側に、又は、前記アルミニウム膜の前
記領域個所に対応する部位の電子銃側に、電子ビーム透
過イ1の低い物質の層を配設して、特定の色の螢光体を
発光させるための電子ビームが、隣接する他の色の螢光
体を発光させるのを抑制するようにした。[Means for Solving the Problems] In order to achieve the above object, in the present invention, an aluminum film is formed on the electron gun side of a phosphor film in which phosphors of each color are arranged in a dot shape or a strip shape. In a shadow mask type color cathode ray tube, the phosphor film has a boundary region located between adjacent dots or stripes of different color phosphors on the electron gun side, or corresponds to the region of the aluminum film. A layer of material with low electron beam transmission rate is placed on the electron gun side of the part, so that the electron beam for making a phosphor of a specific color emit light can cause adjacent phosphors of other colors to emit light. I tried to prevent it from happening.
電子ビーム透過性の低い物質としては、アルミニウムよ
りも原子番号の大きいものを用いれば良L’s
[作用〕
上記のような手段をとれば、螢光体膜の電子銃側で、隣
接する異なる色の螢光体のドツトやストライプの中間の
境界領域が従来に比べて広くなり、逆に螢光体のドツト
やストライプが電子ビームに自由に照射される個所は(
周辺境界線が内側に移動して)僅かではあるが確実に狭
くなる0元来、シャドウマスクと螢光体膜とが、正しい
相対位置に存在している場合は、シャドウマスクの孔を
通過しである特定の色の螢光体のドツト又はストライプ
を発光させるべき電子ビームは、1g!!接する別の色
の螢光体のドツトやストライプを照射することはない、
そのような正しい相対位置関係が、シャドウマスクのド
ーミングによって狂った場合でも、適切に設計されてい
れば、隣接する目的外の別の色の螢光体のドツトやスト
ライプを照射するようになった電子ビームの照射位置の
狂いは僅かである。従って、本発明によって、上記のよ
うに螢光体のドツトやストライプの電子銃に面する側の
、電子ビームが自由に照射できる個所の周辺境界線が僅
かでも内側に移動する影響は大きく、多くの場合に色ず
れを生じないで済むようになる。As a material with low electron beam transmittance, it is best to use a material with an atomic number higher than that of aluminum. The boundary area between the color phosphor dots and stripes is wider than before, and conversely, the area where the phosphor dots and stripes are freely irradiated by the electron beam is (
If the shadow mask and the phosphor film are in the correct relative positions, the shadow mask will pass through the hole in the shadow mask. The electron beam that should emit phosphor dots or stripes of a certain color is 1 g! ! It does not illuminate adjacent dots or stripes of phosphor of another color.
Even if such correct relative positioning is disrupted by shadow mask doming, if properly designed it will still illuminate adjacent dots or stripes of phosphor of a different color for the intended purpose. The deviation in the irradiation position of the electron beam is slight. Therefore, according to the present invention, even if the peripheral boundary line of the part of the phosphor dot or stripe facing the electron gun, where the electron beam can be freely irradiated, moves inward even slightly, the effect is large and many In this case, color shift will not occur.
本発明の実施によって、螢光体を発光させる全電子ビー
ム量が多少減少して理論的にはやや暗くなる場合も生ず
るが1色ずれは極めて鋭敏に目に捕らえられてしまうの
に対し、僅かな明るさの低下は通常は気にならない。By implementing the present invention, the total amount of electron beams that cause the phosphor to emit light may be reduced to some extent, and theoretically it may become slightly darker. A decrease in brightness is usually not a concern.
[実施例]
第1図は本発明に係る螢光体膜の要部断面図で、図中、
lはガラスバルブのパネル、2は異なった色の螢光体の
ドツトやストライプの中間境界領域個所のパネル面側を
埋め、表示コントラストを向上させる所謂ブラックマト
リクス、3は螢光体のドツト又はストライプ、4はアル
ミニウム膜(メタルバック膜)、5は本発明に係る電子
ビーム遮蔽物である。公知の方法で、螢光体のストライ
プ(ドツト)3、アルミニウム膜4を形成した後、ポリ
ビニルアルコール・重クロム酸アンモン系の感光性樹脂
を塗布し、公知の方法により3色螢光体のストライプ(
ドツト)対応位置にだけ上記有機感光性樹脂膜を残留さ
せる。その後、前記有機膜に被覆された螢光体ストライ
プ対応個所と露出したストライプ間境界領域対応個所と
が混在するアルミニウム膜の上に、電子ビーム透過性の
低い物質として、例えば、銀のようなアルミニウムより
原子番号の大きい金属を、真空蒸着法で蒸着して金晟膜
を形成させる1次に通常の方法で、所謂ベーキング(大
気中高温加熱処理)を行えば、有機被膜は燃焼するので
、有機被膜ストライプ(ドツト)上の金属膜は容易に剥
離できる状態になっていて。[Example] FIG. 1 is a cross-sectional view of a main part of a phosphor film according to the present invention, and in the figure,
1 is a glass bulb panel, 2 is a so-called black matrix that fills the panel surface side in the middle boundary area of dots or stripes of different colors of phosphor to improve display contrast, and 3 is a dot or stripe of phosphor. , 4 is an aluminum film (metal back film), and 5 is an electron beam shield according to the present invention. After forming phosphor stripes (dots) 3 and aluminum film 4 by a known method, a polyvinyl alcohol/ammonium dichromate based photosensitive resin is applied, and three-color phosphor stripes are formed by a known method. (
Dots) The organic photosensitive resin film is left only in the corresponding positions. Thereafter, a material having low electron beam transmittance, such as aluminum, such as silver, is applied onto the aluminum film, which has a mixture of areas corresponding to the phosphor stripes covered with the organic film and areas corresponding to the exposed boundary areas between the stripes. First, a metal with a higher atomic number is deposited using a vacuum evaporation method to form a metal film.If the so-called baking (heating treatment at high temperature in the atmosphere) is performed in the usual way, the organic film will burn, so the organic The metal film on the coating stripes (dots) is in a state where it can be easily peeled off.
軽く空気流を吹き付けることによって、所定の位置、形
状に電子ビーム遮蔽物を配設することが出来る。By lightly blowing an air stream, the electron beam shield can be placed in a predetermined position and shape.
また、上記ビーム遮蔽金属を含む、光照射により可溶と
なるナフトキノンアジド化合物の様なポジ型ホトレジス
トを、アルミニウム膜を形成した後に塗布し、公知の方
法で、赤、青、緑の3色相当位置に露光を行い現像を行
うことにより、所定の位置にビーム遮蔽物を形成するこ
とが出来る。In addition, after forming the aluminum film, a positive photoresist such as a naphthoquinone azide compound containing the above-mentioned beam-shielding metal and which becomes soluble upon light irradiation is coated, and the coating is applied in a well-known manner, corresponding to the three colors of red, blue, and green. A beam shield can be formed at a predetermined position by exposing the position to light and performing development.
上記、複数回の露光工程では、jS光マスクとして常に
バルブパネルと対になった特定の一つのシャドウマスク
を用いるから、問題になる程のマスクずれの影響は生じ
ない。In the above-mentioned multiple exposure steps, a specific shadow mask paired with the valve panel is always used as the jS light mask, so that the effect of mask displacement does not become a problem.
[発明の効果コ
以上説明したように本発明によれば、螢光膜のごく近傍
に、シャドウマスクに類似したビーム遮蔽物を形成させ
たため、シャドウマスクのドーミングにより、電子ビー
ムが螢光体膜を叩く位置が多少移動しても、色純度への
影響を殆ど蒙らず、良質な画像を維持できる。[Effects of the Invention] As explained above, according to the present invention, a beam shielding material similar to a shadow mask is formed in the close vicinity of the phosphor film. Even if the hitting position moves slightly, the color purity is hardly affected and a high-quality image can be maintained.
第1図は本発明に係る螢光体膜の要部断面図である。
1・・・ガラスバルブのパネル、 2・・・ブラック
マトリクス、 3・・・螢光体のドツト又はストライ
プ。FIG. 1 is a sectional view of a main part of a phosphor film according to the present invention. 1... Glass bulb panel, 2... Black matrix, 3... Fluorescent dots or stripes.
Claims (1)
列した螢光体膜の電子銃側にアルミニウム膜を形成させ
てあるシャドウマスク形カラー陰極線管において、前記
螢光体膜の隣接する異色螢光体のドット又はストライプ
の中間の境界領域個所の電子銃側に、又は、前記アルミ
ニウム膜の前記領域個所に対応する部位の電子銃側に、
電子ビーム透過性の低い物質の層を配設したことを特徴
とするカラー陰極線管。 2、前記電子ビーム透過性の低い物質として、アルミニ
ウムより原子番号の大きい銀、又はバリウム、又はスズ
、又はビスマスを用いたことを特徴とする請求項1記載
のカラー陰極線管。[Scope of Claims] 1. A shadow mask type color cathode ray tube in which an aluminum film is formed on the electron gun side of a phosphor film in which phosphors of each color are arranged in dots or stripes. on the electron gun side at a boundary region between adjacent dots or stripes of different color phosphors of the film, or on the electron gun side at a region corresponding to the region of the aluminum film,
A color cathode ray tube characterized by having a layer of material with low electron beam transparency. 2. The color cathode ray tube according to claim 1, wherein silver, barium, tin, or bismuth, which has a higher atomic number than aluminum, is used as the material having low electron beam transparency.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1612089A JPH02199747A (en) | 1989-01-27 | 1989-01-27 | Color cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1612089A JPH02199747A (en) | 1989-01-27 | 1989-01-27 | Color cathode-ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02199747A true JPH02199747A (en) | 1990-08-08 |
Family
ID=11907657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1612089A Pending JPH02199747A (en) | 1989-01-27 | 1989-01-27 | Color cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02199747A (en) |
-
1989
- 1989-01-27 JP JP1612089A patent/JPH02199747A/en active Pending
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