JPH0345117B2 - - Google Patents
Info
- Publication number
- JPH0345117B2 JPH0345117B2 JP9313382A JP9313382A JPH0345117B2 JP H0345117 B2 JPH0345117 B2 JP H0345117B2 JP 9313382 A JP9313382 A JP 9313382A JP 9313382 A JP9313382 A JP 9313382A JP H0345117 B2 JPH0345117 B2 JP H0345117B2
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- orange
- emitting
- solution
- earth metal
- 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.)
- Expired
Links
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 8
- 239000000243 solution Substances 0.000 claims description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000004062 sedimentation Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- -1 alkaline earth metal sulfide Chemical class 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 1
- 238000007865 diluting Methods 0.000 claims 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 150000001342 alkaline earth metals Chemical class 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Luminescent Compositions (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
【発明の詳細な説明】
本発明は公害物質を含まず、しかも高輝度のオ
レンジ発光蛍光体により蛍光面を形成するオレン
ジ発光単色表示（陰極線）管の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an orange-emitting monochromatic display (cathode ray) tube that does not contain pollutants and has a phosphor screen made of a high-intensity orange-emitting phosphor.
従来オレンジ発光デイスプレイ管の蛍光面に
は、Cd入り蛍光体Cd2ClPO4：Mnか、あるいは、
Cdを入れない蛍光体Zn2SiO4：Mn、As、Zn3
（PO4）2：Mn、Y2O2S：Euなどの混合体を使用し
てきた。しかし、前者すなわちCd入り蛍光体は
輝度は高いが、公害物質としてCdの使用は規制
を受ける。一方、後者のCdを含まない蛍光体を
使用する場合は、公害規制は受けないがCd入り
蛍光体に比較して輝度が約1/3しかなく、実用上
大きな問題となつていた。 The phosphor screen of conventional orange-emitting display tubes uses Cd-containing phosphor Cd 2 ClPO 4 :Mn or
Phosphor Zn 2 SiO 4 without Cd: Mn, As, Zn 3
Mixtures such as (PO 4 ) 2 :Mn and Y 2 O 2 S:Eu have been used. However, although the former type, that is, Cd-containing phosphors, has high brightness, the use of Cd is regulated as a polluting substance. On the other hand, when using the latter phosphor that does not contain Cd, although it is not subject to pollution regulations, the brightness is only about 1/3 of that of the phosphor containing Cd, which has been a big problem in practice.
本発明の目的は、公害上の問題がなく、輝度が
十分高いオレンジ発光表示管の製造法を提供する
ことにある。 An object of the present invention is to provide a method for manufacturing an orange light-emitting display tube that is free from pollution problems and has sufficiently high brightness.
上記目的を達成するために本発明においては、
オレンジ発光のアルカリ土類金属硫化物蛍光体
を、PH10〜13のアルカリ水溶液中に懸濁させ、更
に水ガラス溶液を希釈混合した液を用いて、古く
から公知の沈降法により蛍光面を形成することと
した。 In order to achieve the above object, in the present invention,
An orange-emitting alkaline earth metal sulfide phosphor is suspended in an alkaline aqueous solution with a pH of 10 to 13, and a phosphor screen is formed by a well-known sedimentation method using a diluted mixture of water glass solution. I decided to do so.
オレンジ発光蛍光体として、アルカリ土類金属
硫化物蛍光体、例えばCaS：Mn、MgS；Eu、
（CaMgSr）Ｓ：Eu、Ceなどがあるがこれらの蛍
光体は非常に加水分解を受け易く、単色管の蛍光
面形成法として公知の通常の沈降法により塗布す
ると加水分解を生じて輝度が半分以下に低下して
しまう。 As orange-emitting phosphors, alkaline earth metal sulfide phosphors, such as CaS:Mn, MgS; Eu,
(CaMgSr)S: There are Eu, Ce, etc., but these phosphors are extremely susceptible to hydrolysis, and when applied by the usual sedimentation method known as the method for forming phosphor screens in monochromatic tubes, hydrolysis occurs and the brightness is halved. It will drop below.
本発明では、アルカリ土類金属硫化物蛍光体の
輝度低下を生じさせないようにPH10〜13のアルカ
リ水溶液中に上記蛍光体を懸濁させ、更に蛍光膜
を強固にするため水ガラス溶液を希釈混合した液
を用いて沈降法により蛍光面を形成させる。こう
すれば、ほとんど輝度低下が生ぜず、従来のCd
入り蛍光体を用いた場合と同等の輝度の蛍光面が
得られる
以上説明したように本発明によれば、Cdを含
まない蛍光体を用いるので公害上の問題がなく、
しかもCd含有蛍光体と同等の輝度を有するオレ
ンジ発光表示管が得られる。 In the present invention, the phosphor is suspended in an alkaline aqueous solution with a pH of 10 to 13 so as not to reduce the brightness of the alkaline earth metal sulfide phosphor, and a water glass solution is diluted and mixed in order to further strengthen the phosphor film. A fluorescent screen is formed by the sedimentation method using the solution. In this way, there will be almost no reduction in brightness, and it will be possible to
As explained above, according to the present invention, since a phosphor that does not contain Cd is used, there is no pollution problem.
Moreover, an orange light-emitting display tube having luminance equivalent to that of a Cd-containing phosphor can be obtained.
Claims (1)
ジ発光のアルカリ土類金属硫化物蛍光体を、PH10
〜13のアルカリ水溶液中に懸濁させ、更に水ガラ
ス溶液を希釈混合した液を用いて沈降法により蛍
光面を形成することを特徴とするオレンジ発光表
示管製造法。1. In the production of orange luminescent display tubes, orange-emitting alkaline earth metal sulfide phosphors are
A method for manufacturing an orange light emitting display tube, which comprises forming a phosphor screen by a sedimentation method using a solution obtained by suspending the alkali aqueous solution of 1 to 13 and further diluting a water glass solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9313382A JPS58210988A (en) | 1982-06-02 | 1982-06-02 | Preparation of display tube emitting orange light |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9313382A JPS58210988A (en) | 1982-06-02 | 1982-06-02 | Preparation of display tube emitting orange light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58210988A JPS58210988A (en) | 1983-12-08 |
| JPH0345117B2 true JPH0345117B2 (en) | 1991-07-10 |
Family
ID=14074018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9313382A Granted JPS58210988A (en) | 1982-06-02 | 1982-06-02 | Preparation of display tube emitting orange light |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58210988A (en) |
-
1982
- 1982-06-02 JP JP9313382A patent/JPS58210988A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58210988A (en) | 1983-12-08 |
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