JPH06131988A - Phosphor sticking structure for cathode-ray tube - Google Patents
Phosphor sticking structure for cathode-ray tubeInfo
- Publication number
- JPH06131988A JPH06131988A JP27733092A JP27733092A JPH06131988A JP H06131988 A JPH06131988 A JP H06131988A JP 27733092 A JP27733092 A JP 27733092A JP 27733092 A JP27733092 A JP 27733092A JP H06131988 A JPH06131988 A JP H06131988A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- layer
- ray tube
- thin film
- cathode
- 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
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、陰極線管用蛍光体被着
構造に係り、特にカラーテレビの陰極線管（ＣＲＴ）の
蛍光面の輝度を向上させるための蛍光体塗布構造に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphor coating structure for a cathode ray tube, and more particularly to a phosphor coating structure for improving the brightness of the phosphor screen of a cathode ray tube (CRT) of a color television.
【０００２】[0002]
【従来の技術】図３はカラー受像管のディスプレイとし
てのＣＲＴの構造を模式的に示した図である。ＣＲＴ
は、パネル１ａとファンネル１ｂからなるガラスバルブ
１内に、スクリーンとしての蛍光面２、色選別機構とし
ての例えばアパーチャグリル（ＡＧ）３、電子線を放射
する電子銃（ガン）４を構成するカソード（陰極）５等
から構成されており、Ｒ（赤）、Ｇ（緑）、Ｂ（青）の
電子線７が電子銃４によって集束、集中作用を受けたあ
とＡＧ３を通り、蛍光面２の蛍光体に照射され発光させ
て画像を形成している。図中６は偏向コイルを示す。2. Description of the Related Art FIG. 3 is a diagram schematically showing the structure of a CRT as a display of a color picture tube. CRT
Is a cathode constituting a fluorescent screen 2 as a screen, an aperture grille (AG) 3 as a color selection mechanism, and an electron gun (gun) 4 for emitting an electron beam in a glass bulb 1 composed of a panel 1a and a funnel 1b. It is composed of a (cathode) 5 and the like, and the R (red), G (green), and B (blue) electron beams 7 are focused and concentrated by the electron gun 4 and then pass through the AG 3 to pass through the fluorescent screen 2. An image is formed by irradiating the phosphor to emit light. Reference numeral 6 in the figure denotes a deflection coil.
【０００３】図４は、図３のパネル１ａと蛍光面２の部
分を拡大して、その蛍光面（蛍光体塗布）構造を示した
模式図であり、特に図４の（ａ）はＣＲＴ前面側の正面
図を示し、（ｂ）はその横断面を示す。FIG. 4 is a schematic view showing the structure of the panel 1a and the phosphor screen 2 in FIG. 3 in an enlarged manner to show the structure of the phosphor screen (phosphor coating). In particular, FIG. The front view of the side is shown, (b) shows the cross section.
【０００４】図４に示すように、従来の蛍光面構造は、
それぞれＲ，Ｇ，Ｂ蛍光体１０，１１，１２がカーボン
ストライプ１４を挟んでパネル１ａ内面に塗布されてい
る。蛍光体１０，１１，１２は、図４（ｂ）に示すよう
に各蛍光体粒子１０ａ，１１ａ，１２ａから形成されて
いる。通常、蛍光体粒子１３は図５に示すように、輝度
安定のため一般的に粒子が３個分積まれた（３段積み）
構造になっている。その蛍光体面にメタルバック層とし
てアルミニウム（Ａｌ）薄膜１６が蒸着により形成され
ている。As shown in FIG. 4, the conventional phosphor screen structure is
R, G, and B phosphors 10, 11, and 12 are applied on the inner surface of the panel 1a with the carbon stripe 14 interposed therebetween. The phosphors 10, 11, 12 are formed of phosphor particles 10a, 11a, 12a as shown in FIG. 4 (b). Usually, as shown in FIG. 5, the phosphor particles 13 are generally stacked by three particles (three layers) for stable brightness.
It is structured. An aluminum (Al) thin film 16 is formed on the phosphor surface as a metal back layer by vapor deposition.
【０００５】上記の蛍光面の構造の良否により発光効率
が異なり、結果として輝度の高低が生じる。The luminous efficiency varies depending on whether the structure of the phosphor screen is good or bad, resulting in high and low brightness.
【０００６】[0006]
【発明が解決しようとする課題】蛍光体１０〜１２及び
カーボンストライプ１４上にメタルバック層として形成
されたＡｌ薄膜１６の凹凸が、上記蛍光面の反射率とし
て作用するため、蛍光面の発光効率と直接関係する。Since the unevenness of the Al thin film 16 formed as the metal back layer on the phosphors 10 to 12 and the carbon stripe 14 acts as the reflectance of the phosphor screen, the luminous efficiency of the phosphor screen. Directly related to.
【０００７】従って、通常Ａｌ薄膜１６を蒸着させる前
処理として、図５に示すように、蛍光体及びカーボンス
トライプ上にプライマル（Primal）樹脂１７を塗布し
て、Ａｌ薄膜１６の蛍光体粒子間への食い込みを低減す
ることにより、蒸着表面の平滑化を図ることが必要であ
る。しかしながら、蛍光体ストライプにおいて、蛍光体
粒子１３の表面の凹凸段差が大きい場合、プライマル樹
脂１７が蛍光体粒子１３間に入り込み、結果としてその
プライマル樹脂１７上に蒸着されるＡｌ薄膜１６面の凹
凸が大きくなるため、Ａｌ薄膜の反射率が低下し、輝度
を劣化させる。Therefore, as a pretreatment for depositing the Al thin film 16 in general, as shown in FIG. 5, the primal resin 17 is applied on the phosphor and the carbon stripes so that the space between the phosphor particles of the Al thin film 16 is increased. It is necessary to smooth the vapor deposition surface by reducing the bite of. However, in the phosphor stripe, if the unevenness of the surface of the phosphor particles 13 is large, the primal resin 17 enters between the phosphor particles 13 and, as a result, the unevenness of the Al thin film 16 surface deposited on the primal resin 17 becomes uneven. Since it becomes large, the reflectance of the Al thin film is lowered and the brightness is deteriorated.
【０００８】そこで、本発明は、蛍光面を構成するメタ
ルバック層としてのＡｌ薄膜を平滑化し得る蛍光体被着
構造を提供することを目的とする。Therefore, it is an object of the present invention to provide a phosphor-adhered structure capable of smoothing an Al thin film as a metal back layer constituting a phosphor screen.
【０００９】[0009]
【課題を解決するための手段】上記課題は本発明によれ
ば、パネル面に被着された蛍光体と、該蛍光体に被着さ
れてなる金属膜とを有してなる陰極線管用蛍光面におい
て、前記蛍光体を、前記パネル面側の蛍光体の粒子径が
第１層目より第２層目が小なる２層で構成したことを特
徴とする陰極線管用蛍光体被着構造によって解決され
る。According to the present invention, the above-mentioned object is to provide a phosphor screen for a cathode ray tube having a phosphor adhered to a panel surface and a metal film adhered to the phosphor. In the present invention, there is provided a phosphor deposition structure for a cathode ray tube, wherein the phosphor is composed of two layers in which the particle size of the phosphor on the panel surface side is smaller than that of the first layer in the second layer. It
【００１０】本発明では、前記第１層目の蛍光体の粒子
径をＡ、第２層目の該粒子径をＢとしたときに、 Ｂ＜１／２Ａ とすることが輝度向上のため、より好適である。In the present invention, when the particle size of the phosphor of the first layer is A and the particle size of the second layer is B, B <1 / 2A is set to improve brightness. It is more suitable.
【００１１】[0011]
【作用】本発明によれば、パネル面に設ける蛍光体の粒
子径が該パネル面側の第１層目より第２層目の方が小さ
いので、第１層目の蛍光体粒子の上面の大きな凹凸段差
部が、第２層目の小さな蛍光体粒子が入り込むことによ
り小さくなり、蛍光体上面の平滑性（平坦性）をより増
大させる。従って、その蛍光体上に蒸着される金属膜と
してのＡｌ膜の平滑化に寄与し、ＣＲＴ輝度の向上が図
れる。According to the present invention, since the particle size of the phosphor provided on the panel surface is smaller in the second layer than in the first layer on the panel surface side, the upper surface of the phosphor particles of the first layer is The large uneven step portion becomes smaller due to the small phosphor particles of the second layer entering, and the smoothness (flatness) of the upper surface of the phosphor is further increased. Therefore, it contributes to the smoothing of the Al film as the metal film deposited on the phosphor, and the CRT brightness can be improved.
【００１２】また、大粒径の蛍光体粒子の欠落部（ピン
ホール）内にも小粒径の蛍光体粒子が埋め込まれるた
め、通常の上記欠落部を改善させ、ＣＲＴ輝度の向上に
寄与する。Further, since the phosphor particles having a small particle diameter are also embedded in the missing portion (pinhole) of the phosphor particles having a large particle diameter, the ordinary missing portion is improved and the CRT brightness is improved. .
【００１３】なお、本発明では、第１層目の蛍光体粒径
をＡとし、第２層目の蛍光体粒径をＢとすれば、 Ｂ＜１／２Ａ の条件において、第２層目の蛍光体粒子が第１層目の蛍
光体粒子の間隙に良好に入り込めるため、上記作用が得
られる。In the present invention, assuming that the particle size of the phosphor of the first layer is A and the particle size of the phosphor of the second layer is B, the second layer is formed under the condition of B <1 / 2A. The above-described action is obtained because the above-mentioned phosphor particles can well enter the gap between the phosphor particles of the first layer.
【００１４】[0014]
【実施例】以下、本発明の実施例を、図面を参照して詳
細に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１５】図１は、本発明に係る蛍光体被着構造の一
実施例を示す部分模式断面図である。図１に示すよう
に、本実施例では粒径が１０μｍの蛍光体粒子２１ａを
塗布形成した上に、第２層として粒径が下層の蛍光体粒
子２１ａの粒径より小さな、例えば粒径が３μｍの蛍光
体粒子２２ａを塗布した蛍光体被着構造を形成した。こ
の蛍光体被着構造は、プライマル樹脂１７と接する蛍光
体部分の凹凸が小さくなり、プライマル樹脂１７の食い
込みが減少することになり、結果的にプライマル樹脂１
７面に被着されるＡｌ薄膜１６の反射率を増大させるこ
とができ、蛍光面の輝度が向上した。FIG. 1 is a partial schematic cross-sectional view showing an embodiment of a phosphor-adhering structure according to the present invention. As shown in FIG. 1, in this embodiment, the phosphor particles 21a having a particle diameter of 10 μm are formed by coating, and the particle diameter of the second layer is smaller than that of the lower phosphor particles 21a, for example, A phosphor-attached structure was formed by applying phosphor particles 22a of 3 μm. In this phosphor-adhered structure, the unevenness of the phosphor portion in contact with the primal resin 17 is reduced, and the bite of the primal resin 17 is reduced. As a result, the primal resin 1
The reflectance of the Al thin film 16 deposited on the seven surfaces can be increased, and the brightness of the phosphor screen is improved.
【００１６】図２は、本発明に係る蛍光体被着構造の他
の実施例を示す部分模式断面図である。図２によれば、
第１層目として粒径が１０μｍの蛍光体粒子２１ｂを粒
子１個分の厚さにパネル面に塗布被着し、その上に第２
層として第１層より粒径の小さな３μｍの蛍光体粒子２
２ｂを塗布被着した状態が示されている。本実施例では
第１層目の蛍光体粒子２１ｂの塗布時、図中の破線部に
蛍光体粒子２１ｂが存在せず、蛍光体粒子の欠落いわゆ
るピンホール部１５を示している。そのピンホール部１
５に第２層目の蛍光体粒子２２ｂが入り込んで欠落ピン
ホールをカバーしている。また、本実施例では、このよ
うに第１層目の蛍光体を蛍光体粒子１個分塗布被着し、
その後、小粒径の蛍光体を塗布被着することにより、上
記ピンホールの防止と同時に、蛍光面の発光効率を最大
にするＡｌ薄膜１６表面の平滑化最適塗布膜厚を実現で
きた。FIG. 2 is a partial schematic cross-sectional view showing another embodiment of the phosphor-adhering structure according to the present invention. According to FIG.
As the first layer, phosphor particles 21b having a particle size of 10 μm are applied and deposited on the panel surface to a thickness of one particle, and the second layer is formed thereon.
3 μm phosphor particles 2 having a smaller particle size than the first layer as a layer
The state in which 2b is coated and deposited is shown. In the present embodiment, when the first-layer phosphor particles 21b are applied, the phosphor particles 21b do not exist in the broken line portion in the figure, and a so-called pinhole portion 15 lacking the phosphor particles is shown. The pinhole part 1
The phosphor particles 22b of the second layer enter 5 to cover the missing pinholes. In addition, in this embodiment, the phosphor of the first layer is coated and adhered for one phosphor particle in this way,
After that, by coating and depositing a phosphor having a small particle size, it was possible to prevent the pinholes and at the same time realize an optimum coating thickness for smoothing the surface of the Al thin film 16 that maximizes the luminous efficiency of the phosphor screen.
【００１７】上記実施例では、第１層と第２層の蛍光体
粒子の粒径の組み合せを、第２層目の蛍光体粒子の粒径
が第１層目のそれより小であれば、例えばそれぞれ１０
μｍと７μｍ、７μｍと３μｍ等、種々適用可能であ
る。In the above embodiment, the combination of the particle diameters of the phosphor particles in the first layer and the second layer is such that if the particle diameter of the phosphor particles in the second layer is smaller than that in the first layer, For example, 10 each
Various applications such as μm and 7 μm, 7 μm and 3 μm, etc. are possible.
【００１８】[0018]
【発明の効果】以上説明したように、本発明によれば、
パネルへの蛍光体の塗布被着で被着面が平坦化され、従
ってその上に蒸着させるＡｌ膜も平坦化が図れ、ＣＲＴ
の蛍光面の輝度向上を図れる。As described above, according to the present invention,
The surface to be adhered is flattened by applying and depositing the phosphor on the panel, so that the Al film to be vapor-deposited thereon can be flattened, and the CRT is used.
The brightness of the phosphor screen can be improved.
【００１９】また、本発明では、局部的粒子の欠落（ピ
ンホール）を防止できるため、上記輝度の向上をより増
大させることができる。Further, according to the present invention, since it is possible to prevent the local particles from missing (pinhole), it is possible to further improve the above-mentioned brightness.
【図１】本発明に係る蛍光体被着構造の一実施例を示す
部分模式断面図である。FIG. 1 is a partial schematic cross-sectional view showing an embodiment of a fluorescent substance-adhering structure according to the present invention.
【図２】本発明に係る蛍光体被着構造の他の実施例を示
す部分模式断面図である。FIG. 2 is a partial schematic cross-sectional view showing another embodiment of the fluorescent substance-adhered structure according to the present invention.
【図３】カラー受像管のＣＲＴの構成模式図である。FIG. 3 is a schematic diagram of the configuration of a CRT of a color picture tube.
【図４】従来のＣＲＴのＲ（赤）、Ｇ（緑）及びＢ
（青）の蛍光面構造を示す図である。FIG. 4 R (red), G (green) and B of a conventional CRT
It is a figure which shows the fluorescent surface structure of (blue).
【図５】従来の一般的な蛍光体被着構造を示す部分拡大
模式断面図である。FIG. 5 is a partially enlarged schematic cross-sectional view showing a conventional general fluorescent substance-adhered structure.
１ ガラスバルブ １ａ パネル １ｂ ファンネル ２ 蛍光面 ３ アパーチャグリル（ＡＧ） ４ 電子銃（ガン） ５ カソード（陰極） ７ 電子線 １０，１１，１２ 蛍光体 １０ａ，１１ａ，１２ａ 蛍光体粒子 １４ カーボンストライプ １５ ピンホール １６ アルミニウム（Ａｌ）薄膜 １７ プライマル（Primal）樹脂 ２１ａ，２１ｂ，２２ａ，２２ｂ 蛍光体粒子 1 Glass Bulb 1a Panel 1b Funnel 2 Phosphor Surface 3 Aperture Grill (AG) 4 Electron Gun (Gun) 5 Cathode (Cathode) 7 Electron Beam 10, 11, 12 Phosphor 10a, 11a, 12a Phosphor Particle 14 Carbon Stripe 15 Pin Hole 16 Aluminum (Al) thin film 17 Primal resin 21a, 21b, 22a, 22b Phosphor particles
Claims (2)
体に被着されてなる金属膜とを有してなる陰極線管用蛍
光面において、 前記蛍光体を、前記パネル面側の蛍光体の粒子径が第１
層目より第２層目が小なる２層で構成したことを特徴と
する陰極線管用蛍光体被着構造。1. A phosphor screen for a cathode ray tube comprising a phosphor adhered to the panel surface and a metal film adhered to the phosphor, wherein the phosphor is the phosphor on the panel surface side. The particle size of the body is first
A fluorescent substance-adhering structure for a cathode ray tube, comprising a two-layer structure in which a second layer is smaller than a second layer.
２層目の該粒子径をＢとしたときに、 Ｂ＜１／２Ａ としたことを特徴とする請求項１記載の陰極線管用蛍光
体被着構造。2. When the particle diameter of the phosphor of the first layer is A and the particle diameter of the second layer is B, B <1 / 2A is satisfied. Of the phosphor coating structure for the cathode ray tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27733092A JPH06131988A (en) | 1992-10-15 | 1992-10-15 | Phosphor sticking structure for cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27733092A JPH06131988A (en) | 1992-10-15 | 1992-10-15 | Phosphor sticking structure for cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06131988A true JPH06131988A (en) | 1994-05-13 |
Family
ID=17582028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27733092A Pending JPH06131988A (en) | 1992-10-15 | 1992-10-15 | Phosphor sticking structure for cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06131988A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6534916B1 (en) | 1998-09-30 | 2003-03-18 | Mitsubishi Denki Kabushiki Kaisha | Panel display with a fluorescent layer |
| EP3423883A4 (en) * | 2016-03-02 | 2020-02-12 | Materion Corporation | Optically enhanced light converter |
-
1992
- 1992-10-15 JP JP27733092A patent/JPH06131988A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6534916B1 (en) | 1998-09-30 | 2003-03-18 | Mitsubishi Denki Kabushiki Kaisha | Panel display with a fluorescent layer |
| EP3423883A4 (en) * | 2016-03-02 | 2020-02-12 | Materion Corporation | Optically enhanced light converter |
| US11782262B2 (en) | 2016-03-02 | 2023-10-10 | Materion Corporation | Optically enhanced light converter |
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