JPS63181251A - Fluorescent character display tube - Google Patents
Fluorescent character display tubeInfo
- Publication number
- JPS63181251A JPS63181251A JP1358887A JP1358887A JPS63181251A JP S63181251 A JPS63181251 A JP S63181251A JP 1358887 A JP1358887 A JP 1358887A JP 1358887 A JP1358887 A JP 1358887A JP S63181251 A JPS63181251 A JP S63181251A
- Authority
- JP
- Japan
- Prior art keywords
- display tube
- cover glass
- coating
- film
- weight
- 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
- 239000006059 cover glass Substances 0.000 claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 13
- 239000010439 graphite Substances 0.000 claims abstract description 13
- 239000011248 coating agent Substances 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 12
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract description 2
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract description 2
- 229910044991 metal oxide Inorganic materials 0.000 abstract 3
- 150000004706 metal oxides Chemical class 0.000 abstract 3
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 abstract 1
- 238000000034 method Methods 0.000 description 13
- 239000011521 glass Substances 0.000 description 9
- 230000031700 light absorption Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 235000019353 potassium silicate Nutrition 0.000 description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 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）
本発明は蛍光表示管に関し、特に蛍光体層が形成された
透光性陽極基板と、この陽極基板に対面しているカバー
ガラスとを有し、このカバーガラス内面にグラファイト
を主成分とする被膜が被着されてなる蛍光表示管に関す
る。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fluorescent display tube, and more particularly, to a fluorescent display tube having a transparent anode substrate on which a phosphor layer is formed and a cover glass facing the anode substrate. The present invention also relates to a fluorescent display tube in which a coating containing graphite as a main component is adhered to the inner surface of the cover glass.
（従来の技術）
最近、透光性の陽極基板を用い、蛍光体層の発光を、こ
の基板を通して観察する、いわゆる平面発光型蛍光表示
管が広く使われていた。(Prior Art) Recently, so-called flat-emission type fluorescent display tubes have been widely used, which use a transparent anode substrate and observe the light emitted from a phosphor layer through the substrate.
この種の表示管では制御電極やカバーガラスからの反射
光が非発光部蛍光体を透過し、表示のコントラストを低
下させることを防ぐため、カバーガラス面に光吸収層を
設ける手法がとられている。In this type of display tube, a light absorption layer is provided on the surface of the cover glass to prevent reflected light from the control electrodes and cover glass from transmitting through the non-light-emitting phosphor and reducing display contrast. There is.
（発明が解決しようとする問題点）
上述した従来の蛍光表示管は、光吸収層としてカバーガ
ラス内面にグラファイトを主成分とする被膜を形成する
手法がとられているが、このグラファイトを主成分とす
る被膜には、カバーガラスとの被着力を強くし、被膜の
強度を向上させるためにバインダガラスと称する水ガラ
ス（Ｎａ２０−５ｉ０２． Ｋ２Ｏ−５ｉ０２． Ｌｉ
２Ｏ−５ｉ０２等）が多量（１５〜３０重量％）に含ま
れており、被膜形成時や、表示管の製造工程において高
温（３００〜６００℃）で加熱される際にカバーガラス
とバインダガラスが反応し、被膜内に多量の水分が吸着
され、表示管は輝度が著しく低下するという欠点かある
。(Problems to be Solved by the Invention) The conventional fluorescent display tube described above employs a method of forming a film mainly composed of graphite on the inner surface of the cover glass as a light absorption layer. In order to strengthen the adhesion to the cover glass and improve the strength of the coating, water glass (Na20-5i02. K2O-5i02. Li
2O-5i02, etc.) is contained in a large amount (15 to 30% by weight), and the cover glass and binder glass are This reaction causes a large amount of moisture to be adsorbed within the film, resulting in a significant drop in brightness of the display tube.
本発明の蛍光表示管は、カバーガラス内面に被着されて
いる被膜に含まれるアルカリ金属酸化物の含４Ｔｍが０
．１〜３．０重量％である。In the fluorescent display tube of the present invention, the 4Tm content of alkali metal oxides contained in the coating adhered to the inner surface of the cover glass is 0.
．． It is 1 to 3.0% by weight.
このように、カバーガラス内面に被着される被膜を構成
する水ガラス量を０．１〜０．３重量％とすることによ
って、カバーガラスと被膜との被着強度を確保しつつ、
被ｎｑ形成時におきるカバーガラスと被膜内の水ガラス
成分との反応を少くし、従って、表示管内における残留
微量水分が減少し、配設されたフィラメントからの電ｆ
放射を容易にし、表示管の輝度を著しく向ｔさせること
ができる。In this way, by setting the amount of water glass constituting the coating applied to the inner surface of the cover glass to 0.1 to 0.3% by weight, the adhesion strength between the cover glass and the coating is ensured, while
This reduces the reaction between the cover glass and the water glass component in the coating that occurs during the formation of the coating, and therefore reduces the amount of residual moisture in the display tube, reducing the amount of electricity from the disposed filament.
It facilitates radiation and can significantly improve the brightness of the display tube.
〔実施例）
次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図は本発明の蛍光表示管の一実施例の縦断面図であ
る。FIG. 1 is a longitudinal sectional view of one embodiment of the fluorescent display tube of the present invention.
リード端子９、給電配線６、表示電極ＩＯ１蛍光体層８
、絶縁層７が接着された透光性陽極基板５と、これと対
面してグラファイト被膜２が被着されたカバーガラス１
が、スペーサガラス１１を介してフリットガラス１２に
より接着され、このようにして形成された内部にフィラ
メント３と制御電極４が配設されて蛍光表示管が構成さ
れる。Lead terminal 9, power supply wiring 6, display electrode IO1 phosphor layer 8
, a translucent anode substrate 5 to which an insulating layer 7 is adhered, and a cover glass 1 to which a graphite coating 2 is adhered facing it.
are adhered with a frit glass 12 via a spacer glass 11, and a filament 3 and a control electrode 4 are disposed inside the thus formed interior to constitute a fluorescent display tube.
次に、本実施例の蛍光表示管の製造方法（第１の方法）
について説明する。Next, a method for manufacturing the fluorescent display tube of this example (first method)
I will explain about it.
まず、ソーダライムガラスからなるガラス基板５にスパ
ッタ法による＾ｌ薄膜を被着し、フォトリソグラフィ法
により給電配線６と透光性を有するストライブ状の表示
電極ＩＯを形成した。さらに印刷法により絶縁層７を形
成し、次に同じく蛍光体層８を形成した。以上の工程に
より透光性陽極基板５を得た。次に、同じくソーダライ
ムガラスであるカバーガラス１にＮａ２Ｏ０，８重量％
、５ｉ０２７．０重量％、Ａｌ２０３２０重量％、グラ
ファイト粉３０重量％、有機溶剤４２．４重量％からな
るペーストを印刷し、 ５００℃で加熱焼成し、グラフ
ァイトを主成分とする被膜２を形成する。この加熱焼成
後の被膜２には有機溶剤分が消失しているためＮａ２Ｏ
が１．０ｆｆｉｆｆｉ％含まれている。次に、このカバ
ーガラス１にスペーサガラス１１をフリットガラス１２
により封着し、これと萌述した透光性陽極基板５にフィ
ラメント３、制御電極４等を配設したものを従来の蛍光
表示管の製造方法により封着し、真空封止することによ
り蛍光表示管を得た。First, a thin film was deposited on a glass substrate 5 made of soda lime glass by sputtering, and a power supply wiring 6 and light-transmitting strip-shaped display electrodes IO were formed by photolithography. Furthermore, an insulating layer 7 was formed by a printing method, and then a phosphor layer 8 was similarly formed. Through the above steps, a transparent anode substrate 5 was obtained. Next, 0.8% by weight of Na2O was added to the cover glass 1, which is also soda lime glass.
, 27.0% by weight of 5i0, 20% by weight of Al203, 30% by weight of graphite powder, and 42.4% by weight of organic solvent is printed and fired at 500° C. to form a coating 2 mainly composed of graphite. Since the organic solvent has disappeared from the coating 2 after heating and baking, Na2O
Contains 1.0ffiffi%. Next, a spacer glass 11 and a frit glass 12 are attached to this cover glass 1.
The filament 3, control electrode 4, etc. are arranged on the translucent anode substrate 5 as described above, and this is sealed using a conventional method for manufacturing a fluorescent display tube, and the fluorescent display is sealed by vacuum sealing. Obtained a display tube.
次に、本実施例の蛍光表示管の他の製造方法（第２の方
法）について説明する。Next, another method (second method) for manufacturing the fluorescent display tube of this example will be explained.
Ｎａ２Ｏ０，６重量％、Ｋ２Ｏ１，２重量％、Ｓ＋０２
７．０重量％、＾１２０３２０重量％、グラファイト粉
３０重四％、有機溶剤４１．２重量％からなるペースト
を第１の方法と同じくカバーガラス１に印刷、加熱、焼
成し、グラファイトを主成分とする被膜２を形成する。Na2O0.6% by weight, K2O1.2% by weight, S+02
A paste consisting of 7.0% by weight, ^120320% by weight, 30% by weight of graphite powder, and 41.2% by weight of an organic solvent was printed on the cover glass 1 in the same manner as in the first method, heated, and fired, and graphite was the main component. A coating 2 is formed.
このカバーガラス１と、スペーサガラス１１、フィラメ
ント３、制御電極４、第１の方法ＪｆｌＹ’述べた透光
性陽極基板５等、を第１の方法に述べた製法により製造
し、Ｎａ２Ｏを１．０重量％、Ｋ２Ｏを２．０重量％含
み、かつグラファイトを主成分とする被膜２をもつ蛍光
表示管を得た。This cover glass 1, the spacer glass 11, the filament 3, the control electrode 4, the transparent anode substrate 5 described in the first method, etc. were manufactured by the manufacturing method described in the first method, and Na2O was added in 1. A fluorescent display tube having a coating 2 containing 0% by weight, 2.0% by weight of K2O, and mainly composed of graphite was obtained.
次表は、第１の方法および第２の方法の蛍光表示管の輝
度と従来のグラファイトペースト材料を使用して、前述
の被膜２を形成した蛍光表示管の輝度比を示したもので
ある。The following table shows the brightness ratio of the fluorescent display tubes of the first method and the second method and the brightness of the fluorescent display tube in which the above-mentioned coating 2 was formed using the conventional graphite paste material.
第１の方法が１００％、第２の方法が７５％だけ輝度が
従来の材料を使用した表示管に比べ輝度が向上している
。The brightness is improved by 100% in the first method and 75% in the second method compared to display tubes using conventional materials.
以上説明したように被膜内のＮａ２Ｏ、Ｋ２Ｏ等のアル
カリ金属酸化物量により表示管の輝度が著しく左右され
ることが判フたので、被Ｍ２内に占めるアルカリ金属酸
化物量と表示管の輝度との関係を詳しく調査したところ
第２図の結果が得られた。As explained above, it has been found that the brightness of the display tube is significantly affected by the amount of alkali metal oxides such as Na2O and K2O in the coating, so the amount of alkali metal oxides in the M2 and the brightness of the display tube are When we investigated the relationship in detail, we obtained the results shown in Figure 2.
第２図に示した通り表示管の輝度は、主に光吸収を目的
として設けられたグラファイトを主成分とする被膜２に
含まれるアルカリ金属酸化物量が３．０重量％を超える
と非常に低下することがわかった。また、アルカリ金属
酸化物量を０．１重量％未満に低減すると被膜強度が弱
くなり、カバーガラスとのはく離等の問題が生じるが、
０．１重量％以上であれば蛍光表示管として使用可能
であることもわかった。As shown in Figure 2, the brightness of the display tube decreases significantly when the amount of alkali metal oxide contained in the coating 2, which is mainly composed of graphite and is provided for the purpose of light absorption, exceeds 3.0% by weight. I found out that it does. Furthermore, if the amount of alkali metal oxide is reduced to less than 0.1% by weight, the film strength will be weakened and problems such as peeling from the cover glass will occur.
It was also found that if the content was 0.1% by weight or more, it could be used as a fluorescent display tube.
また、上述の２つの実施例では、アルカリ金属酸化物と
してＮａ２Ｏ、Ｋ２Ｏについて述べたがＬｉ２Ｏについ
ても同様の効果が確認さ九た。Further, in the above two examples, Na2O and K2O were described as the alkali metal oxides, but similar effects were confirmed with Li2O.
以上説明したように本発明は、主に光吸収を目的とし、
カバーガラス内面に被着させるグラファイトを主成分と
する被膜に含有せしめるアルカリ金属酸化物量を０．１
〜３．０重量％に低減することにより、カバーガラスと
被膜との反応を低減せしめ、結果的に表示管の輝度を従
来に比し飛躍的に向上せしめる効果がある。As explained above, the present invention mainly aims at light absorption,
The amount of alkali metal oxide contained in the graphite-based coating to be adhered to the inner surface of the cover glass is 0.1.
By reducing the content to 3.0% by weight, the reaction between the cover glass and the coating is reduced, and as a result, the brightness of the display tube is dramatically improved compared to the conventional one.
第１図は本発明の蛍光表示管の一実施例を示す縦断面図
、第２図はグラファイトを主成分とする被膜に含まれて
いるアルカリ金属酸化物比率（重量％）と相対輝度（％
）との関係を示すグラフである。
１・・・カバーガラス、 ２・・・グラファイト被膜
、３・・・フィラメント、 ４・・・制御電極、５・・
・透光性陽極基板、６・・・給電配線、７・・・絶縁層
、 ８・−蛍光体層、９−・リード端子、 Ｉ
Ｏ−・・表示電極、月−・スペーサガラス、１２・−
フリットガラス。Fig. 1 is a vertical cross-sectional view showing an embodiment of the fluorescent display tube of the present invention, and Fig. 2 shows the ratio of alkali metal oxide (% by weight) contained in the coating mainly composed of graphite and the relative brightness (%).
) is a graph showing the relationship between DESCRIPTION OF SYMBOLS 1... Cover glass, 2... Graphite coating, 3... Filament, 4... Control electrode, 5...
- Transparent anode substrate, 6... Power supply wiring, 7... Insulating layer, 8--phosphor layer, 9-- Lead terminal, I
O-・Display electrode, Moon-・Spacer glass, 12・-
fritted glass.
Claims (1)
基板に対面しているカバーガラスとを有し、このカバー
ガラス内面にグラファイトを主成分とする被膜が被着さ
れてなる蛍光表示管において、 該被膜に含まれるアルカリ金属酸化物の含有量が０．１
〜３．０重量％であることを特徴とする蛍光表示管。 ２、前記アルカリ金属酸化物がＮａ＿２Ｏ、Ｌｉ＿２Ｏ
、Ｋ＿２Ｏのうちいずれか１成分以上を含んでいる特許
請求範囲第１項記載の蛍光表示管。[Claims] 1. A light-transmitting anode substrate on which a phosphor layer is formed and a cover glass facing the anode substrate, and a coating mainly composed of graphite is formed on the inner surface of the cover glass. In the fluorescent display tube formed by coating, the content of alkali metal oxide contained in the coating is 0.1
A fluorescent display tube characterized in that the content is 3.0% by weight. 2. The alkali metal oxide is Na_2O, Li_2O
, K_2O, the fluorescent display tube according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1358887A JPS63181251A (en) | 1987-01-22 | 1987-01-22 | Fluorescent character display tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1358887A JPS63181251A (en) | 1987-01-22 | 1987-01-22 | Fluorescent character display tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63181251A true JPS63181251A (en) | 1988-07-26 |
Family
ID=11837351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1358887A Pending JPS63181251A (en) | 1987-01-22 | 1987-01-22 | Fluorescent character display tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63181251A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02119489A (en) * | 1988-10-28 | 1990-05-07 | Matsushita Electric Ind Co Ltd | Television receiver |
| JPH03103549U (en) * | 1990-02-09 | 1991-10-28 |
-
1987
- 1987-01-22 JP JP1358887A patent/JPS63181251A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02119489A (en) * | 1988-10-28 | 1990-05-07 | Matsushita Electric Ind Co Ltd | Television receiver |
| JPH03103549U (en) * | 1990-02-09 | 1991-10-28 |
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