CN1185017A - 用于无闪变阴极射线管的磷光荧光屏及其制备方法 - Google Patents
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Abstract
一种制造用于无闪变阴极射线管的磷光荧光屏的方法,其包含步骤有:在用于一阴极射线管的面板上形成红及绿磷光体层,在该面板上形成有一黑阵列;通过涂覆蓝色磷光体淤浆并干燥,而在该形成有黑阵列的面板上形成一蓝磷光体层;及通过在该蓝磷光体层上涂敷一紫外线磷光体淤浆并干燥而形成一双磷光体层。
Description
本发明涉及一用于阴极射线管(CRT)的磷光荧光屏(phosphor screen),特别涉及用于无闪变阴极射线管的磷光荧光屏,在该阴极射线管中,闪变现象通过在传统蓝磷光荧光屏层上,形成一具紫外线(UV)磷光体的双磷光荧光屏而降低。
一传统荫罩(Shadow-Mask)阴极射线管使用为一偏向线圈所偏向的三电子束。这些光束在碰撞一选定磷光荧光屏材料之前,横穿过一已穿孔的金属遮罩(荫罩)。该形成在荧光屏内表面的选定磷光体包含一红、绿及蓝磷光体图案,及一黑阵列(BM),该黑阵列在磷光体之间形成。通过该阴罩的三电子光束集中在荧光屏上及每一光束碰撞在红、蓝或绿磷光体中的一磷光体上。
一般而言,一形成一磷光荧光屏的方法包含以下步骤。
将一光阻剂(photoresist)涂覆在面板的内表面上,并通过加热或其他方法所干燥,并且,曝露到辐射通过罩槽孔(mask slots)的紫外线射线下。该曝露的面板被清洗且并显影,以除去未曝光的光阻剂然后干燥。将一黑阵列材料涂覆在面板上,在该面板上,涂覆有光阻剂的部分被有规则地制成图案。此后,该面板被蚀刻以产生黑阵列层。红、绿及蓝磷光体顺序地涂敷在没有黑阵列点存在的部分,以产生一磷光荧光屏。如图1所示,红、绿及蓝磷光体单独地存在于一传统阴极射线管内。作为传统红、绿及蓝磷光体,使用具有各种衰减时间特性的化学元素。特别是,ZnS:AgCl或ZnS:Ag,Al磷光体被用作蓝磷光体并且蓝磷光体的衰减需100-200微秒,相对于其全亮度具有10%的亮度(10%衰减时间)。一般而言,在一阴极射线管中,电子束扫描线扫描蓝磷光体的扫描速度是大约16毫秒。如上所述,传统蓝磷光体的衰减时间相对于传统阴极射线管中的一电子束扫描线的扫描速度是非常地短,从而发生一闪变现象。由于闪变现象,观看电视或监视器的人会感到眼睛疲劳。
为了解决上述问题,本发明的目的是提供一用于无闪变阴极射线管的磷光荧光屏,其中闪变被减少,以及相对于传统阴极射线管较为简单的制备该磷光荧光屏的方法。
为了完成该目的,本发明提供一用于无闪变阴极射线管的磷光荧光屏,其包含一面板,在该面板上形成一黑阵列;红、绿及蓝磷光体层在未形成黑阵列的所述面板的区域上形成;及在蓝磷光体层上形成一紫外线磷光体层。
再者,本发明提供一制造一用于无闪变阴极射线管的磷光荧光屏的方法,其包含下列步骤:在形成有黑阵列的阴极射线管面板上形成红及绿磷光体层;通过涂覆蓝色磷光淤浆,而在该形成有黑阵列的面板上形成一蓝磷光体层并干燥;及通过在该蓝磷光体层上涂覆一紫外线磷光体淤浆而形成一双磷光体层并干燥。
由紫外线磷光体所发射的紫外线的波长优选是在300-420纳米的范围内。
该紫外线磷光体是从包含Cas:Pb,CaO:Pb,Y2O3:Gd,HfO2:Ti,Zn2SiO4:Ti,ZnGa2O4:Li,Ti,Y2SiO5:Ce,Y2Si2O7:Ce,BaSi2O5:Pb及Ba2SiO4:Pb的组中选择。
优选的蓝磷光体是ZnS:Ag,Cl及ZnS:Ag,Al。该蓝磷光体产生具有比电子束发射时间长的衰减时间的光致发光。
例如,因为Y2O3:Gd的衰减时间是在1至2毫秒之内,其可以用来提供较长的衰减时间,这正是本发明的目的。
另外,本发明的方法通过两次涂覆并干燥步骤及一次曝光、显影及清洗步骤,而产生一蓝磷光体及紫外线磷光体的双磷光荧光屏。因此,该方法可以产生一双磷光荧光屏,而本质上不改变传统的方法也不大量地增加生产时间。
在本发明中,在紫外线磷光体淤浆被涂覆在传统红、绿及蓝磷光体层的蓝层上之后,涂覆一铝层。
本发明的其他目的、优点及特性将在以下的说明中加以叙述,对于本领域普通技术人员来说将是显而易见的或通过实施本发明而了解。本发明的目的和优点将由所附的权利要求书中特别指出的工具及结合而实现及获得。
图1为一传统磷光荧光屏的剖面图,及
图2为一用于无闪变阴极射线管的双磷光体层的磷光荧光屏的剖面图,其中一紫外线磷光体层是依据本发明的实施方案在蓝磷光体层上形成。
在以下详细的说明中,只示出并说明本发明的优选实施方案,通过简单地例示由本发明的发明人所想出的实施本发明的最佳模式。可以了解的是,本发明的各方面可以加以修改,而不偏离本发明的范围下。因此,附图及说明应被认为是示范性的,而不是作为限制用。
虽然本发明已经参考一优选实施方案加以说明,但可以了解的是,本发明并不限制于本文所描述的优选实施方案。
[代表例]
一玻璃面板系被清洗,并且,包含聚乙烯醇、重铬酸钠、氧化丙烯及氧化乙烯的聚合物、丙烯酸乳液及纯水的光阻剂被涂覆在面板的内侧并干燥及显影,以制备一光阻剂图案。此后,石墨被涂覆在所形成的光阻剂图案上并使用过氧化氢加以蚀刻,以通过除去光阻剂而制备黑阵列层。此后,一包含磷光体粒子、纯水及聚乙烯醇的淤浆被涂覆在该黑阵列层上并干燥、曝光、显影、清洗并干燥以制备一红及绿磷光荧光屏。再者,一ZnS:Ag,Cl蓝磷光体及一紫外线磷光体在该黑阵列层上形成,及同时曝光、显影并清洗,以产生一包含蓝磷光体层及紫外线磷光体层的双磷光荧光屏。由该方法所形成的磷光荧光屏的衰减时间是远远长于仅由一传统蓝磷光体所形成的荧光屏的衰减时间。
特别是包含Pb及Gd的磷光体体系是有用的,因为其衰减时间是以毫秒为单位计算,以及已知BaSi2O5:Pb或Y2O3:Gd是被电子束所良好地照亮。
实验例1-3:用于涂覆材料中的蓝磷光体的最佳量的测定
当一例如ZnS:Ag,Cl的蓝磷光体及一例如Zn2SiO4:Ti的紫外线磷光体分别作为第一及第二层涂覆在面板上时,将被涂覆的蓝磷光体的量是用以降低闪变现象的一重要因素。因此,制备具有各种数量的蓝磷光体的淤浆,如下表1所示。在首先通过涂覆每一实施例的淤浆,以在面板上形成一磷光体层之后,测定衰减时间及相对亮度,其结果示于下表1。在实验例1至3所制备的淤浆中,具有一长衰减时间及良好相对亮度的实验例2的淤浆作为用于涂覆材料中的最佳蓝磷光体的量而被测定。
表1:蓝磷光体的最佳量的测定
实施例4-6:用于涂覆材料中的紫外线磷光体最佳量的测定
成份 | 淤浆条件 | ||
实验例1 | 实验例2 | 实验例3 | |
H2O | 150克 | 150克 | 150克 |
PVA | 80克 | 83克 | 85克 |
表面活性剂 | 16克 | 16克 | 16克 |
敏化剂 | 5克 | 5克 | 5克 |
ZnS:Ag,Cl | 100克 | 90克 | 80克 |
衰减时间(微秒) | 150 | 150 | 150 | |
相对亮度(%) | 100 | 97 | 90 |
为了测定用于第二涂层中的例如Zn2SiO4:Ti(400nm)的紫外线磷光体的最佳数量,制备具有各种数量的紫外线磷光体的淤浆,该紫外线磷光体层也影响闪变的降低及阴极射线管的亮度,如下表2所示(因为淤浆中紫外线磷光体的数量增加,亮度减少,但闪变大大地减少)。蓝磷光体层是使用实验例2的淤浆而形成在玻璃面板(2×2cm2),然后,紫外线磷光体层旋转涂覆在其上。此后,玻璃面板被放置在一可拆卸阴极射线管及使用奥斯玛(Osma)分光光度计(10kV加速)分析和评估发光光谱,其结果示于下表2中。
比较例
以与实施例2相同的方法制备磷光体层,除了不使用例如Zn2SiO4:Ti的紫外线磷光体。评估磷光荧光屏的特性,其结果示于下表2。
表2:紫外线磷光体最佳数量的测定
成份 | 比较例 | 实施例4 | 实施例5 | 实施例6 |
H2O | - | 150克 | 150克 | 150克 |
PVA | - | 80克 | 80克 | 80克 |
表面活性剂 | - | 16克 | 16克 | 16克 |
敏化剂 | - | 5克 | 5克 | 5克 |
ZnSi2O4:Ti紫外线磷光体 | - | 20克 | 40克 | 60克 |
衰减时间(10%衰减) | 150微秒 | 200微秒 | 380微秒 | 600微秒 |
蓝相对亮度(%) | 100 | 95 | 92 | 87 |
色坐标(x/y) | 0.153/0.067 | 0.150/0.069 | 0.151/0.070 | 0.152/0.071 |
如表2所示,本发明的磷光荧光屏的蓝相对亮度依据紫外线磷光体的成分量由5%减至13%,但是衰减时间增加至比较例衰减时间的4倍。因此,已经证明闪变现象可大大地降低。
本发明可以通过制备一包含蓝磷光体及一紫外线磷光体的双层磷光荧光屏增加蓝磷光体的衰减时间,而不改变阴极射线管中的电路。因此,观看含有本发明的磷光体的电视或监视器的人将不会感到眼睛疲劳。
包含Pb或Ti等作为活化剂的紫外线磷光体的衰减时间远远长于例如ZnS:Ag,Cl的传统蓝磷光体的衰减时间,因此,蓝磷光体可以被激发一较长时间。再者,可以用紫外线磷光体作为紫外线磷光荧光屏所需的紫外线磷光体的显影,其可用以控制蓝磷光体的衰减时间,并可以应用至阴极发光。
再者,一紫外线磷光荧光屏可以只通过涂覆及干燥很容易地形成。因此,虽然本发明是一双磷光体层的磷光荧光屏,但本发明并不会增加生产荧光屏的废品率并可以控制衰减时间,这是传统蓝磷光体的缺点。
在本发明的公开文本中,只示出了并描述了本发明的优选实施方案,但是,如同前述,本发明可以用在各种不同的组合及环境中,并可以在所表示的本发明构思的范围内作出各种改变及修改。
Claims (7)
1.一种用于无闪变阴极射线管的磷光荧光屏,该荧光屏包含:
一面板,其上形成有一黑阵列;
红、绿及蓝磷光体层,其在该面板上黑阵列未形成的区域上形成;及
紫外线磷光体层,它在该蓝磷光体层上形成。
2.如权利要求1所述的用于无闪变阴极射线管的磷光荧光屏,其中从紫外线磷光体发射的紫外线的波长在300-420纳米的范围内。
3.如权利要求1所述的用于无闪变阴极射线管的磷光荧光屏,其中上述紫外线磷光体层是从包含CaS:Pb,CaO:Pb,Y2O3:Gd,HfO2:Ti,Zn2SiO4:Ti,ZnGa2O4:Li,Ti,Y2SiO5:Ce,Y2Si2O7:Ce,BaSi2O5:Pb及Ba2SiO4:Pb的组中选择。
4.如权利要求1所述的用于无闪变阴极射线管的磷光荧光屏,其中上述蓝磷光体是ZnS:Ag,Cl及ZnS:Ag,Al。
5.一种用以制造一用于无闪变阴极射线管的磷光荧光屏的方法,包含下列步骤:
在一用于阴极射线管的面板上形成红及绿磷光体层,在该面板上形成有一黑阵列;
在该已形成有黑阵列的面板上通过涂覆蓝磷光体淤浆并干燥而在其上形成一蓝磷光体层;
通过在该蓝磷光体层上涂覆紫外线磷光体淤浆并干燥而形成一双磷光体层。
6.如权利要求5所述的制造一用于无闪变阴极射线管的磷光荧光屏的方法,其中上述紫外线磷光体是从包含CaS:Pb,CaO:Pb,Y2O3:Gd,HfO2:Ti,Zn2SiO4:Ti,ZnGa2O4:Li,Ti,Y2SiO5:Ce,Y2Si2O7:Ce,BaSi2O5:Pb及Ba2SiO4:Pb的组中选择。
7.如权利要求5所述的制造一用于无闪变阴极射线管的磷光荧光屏的方法,其中上述蓝磷光体是ZnS:Ag,Cl及ZnS:Ag,Al。
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CN97123087A Pending CN1185017A (zh) | 1996-12-13 | 1997-12-05 | 用于无闪变阴极射线管的磷光荧光屏及其制备方法 |
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Country | Link |
---|---|
US (1) | US5998918A (zh) |
KR (1) | KR100199557B1 (zh) |
CN (1) | CN1185017A (zh) |
BR (1) | BR9705548A (zh) |
DE (1) | DE19751582A1 (zh) |
TW (1) | TW449766B (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100385688C (zh) * | 1998-11-30 | 2008-04-30 | 通用电气公司 | 具有高发光效率的含磷光体的发光器件 |
CN100551996C (zh) * | 2006-11-30 | 2009-10-21 | 中国科学院长春光学精密机械与物理研究所 | 一种白光发射长余辉荧光粉及其制备方法 |
CN101218621B (zh) * | 2005-04-01 | 2011-07-13 | Prysm公司 | 具有包含光学荧光材料的屏幕的显示系统和装置 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10043530A1 (de) * | 2000-09-05 | 2002-03-14 | Philips Corp Intellectual Pty | Farbbildschirm mit blauer Leuchtstoffschicht |
US7733310B2 (en) | 2005-04-01 | 2010-06-08 | Prysm, Inc. | Display screens having optical fluorescent materials |
US7474286B2 (en) | 2005-04-01 | 2009-01-06 | Spudnik, Inc. | Laser displays using UV-excitable phosphors emitting visible colored light |
US7791561B2 (en) | 2005-04-01 | 2010-09-07 | Prysm, Inc. | Display systems having screens with optical fluorescent materials |
US7994702B2 (en) | 2005-04-27 | 2011-08-09 | Prysm, Inc. | Scanning beams displays based on light-emitting screens having phosphors |
US8000005B2 (en) * | 2006-03-31 | 2011-08-16 | Prysm, Inc. | Multilayered fluorescent screens for scanning beam display systems |
US8089425B2 (en) | 2006-03-03 | 2012-01-03 | Prysm, Inc. | Optical designs for scanning beam display systems using fluorescent screens |
US7884816B2 (en) | 2006-02-15 | 2011-02-08 | Prysm, Inc. | Correcting pyramidal error of polygon scanner in scanning beam display systems |
US8451195B2 (en) | 2006-02-15 | 2013-05-28 | Prysm, Inc. | Servo-assisted scanning beam display systems using fluorescent screens |
US8013506B2 (en) | 2006-12-12 | 2011-09-06 | Prysm, Inc. | Organic compounds for adjusting phosphor chromaticity |
US7697183B2 (en) | 2007-04-06 | 2010-04-13 | Prysm, Inc. | Post-objective scanning beam systems |
RU2442197C2 (ru) * | 2007-05-17 | 2012-02-10 | Призм, Инк. | Многослойные экраны со светоизлучающими полосками для систем отображения со сканирующим лучом |
US8556430B2 (en) | 2007-06-27 | 2013-10-15 | Prysm, Inc. | Servo feedback control based on designated scanning servo beam in scanning beam display systems with light-emitting screens |
US7878657B2 (en) | 2007-06-27 | 2011-02-01 | Prysm, Inc. | Servo feedback control based on invisible scanning servo beam in scanning beam display systems with light-emitting screens |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3826944A (en) * | 1970-06-04 | 1974-07-30 | Westinghouse Electric Corp | Cathode ray tube with inorganic phosphor and fiber optic face plate |
US5569977A (en) * | 1994-03-08 | 1996-10-29 | Philips Electronics North America Corporation | Cathode ray tube with UV-reflective filter and UV-excitable phosphor |
US5667724A (en) * | 1996-05-13 | 1997-09-16 | Motorola | Phosphor and method of making same |
KR100197579B1 (ko) * | 1996-12-03 | 1999-06-15 | 손욱 | 이중층 형광막 및 그의 제조방법 |
-
1996
- 1996-12-13 KR KR1019960065360A patent/KR100199557B1/ko not_active IP Right Cessation
-
1997
- 1997-11-10 TW TW086116768A patent/TW449766B/zh not_active IP Right Cessation
- 1997-11-20 DE DE19751582A patent/DE19751582A1/de not_active Withdrawn
- 1997-11-24 US US08/976,946 patent/US5998918A/en not_active Expired - Fee Related
- 1997-11-24 BR BR9705548A patent/BR9705548A/pt not_active IP Right Cessation
- 1997-12-05 CN CN97123087A patent/CN1185017A/zh active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100385688C (zh) * | 1998-11-30 | 2008-04-30 | 通用电气公司 | 具有高发光效率的含磷光体的发光器件 |
CN101218621B (zh) * | 2005-04-01 | 2011-07-13 | Prysm公司 | 具有包含光学荧光材料的屏幕的显示系统和装置 |
CN100551996C (zh) * | 2006-11-30 | 2009-10-21 | 中国科学院长春光学精密机械与物理研究所 | 一种白光发射长余辉荧光粉及其制备方法 |
Also Published As
Publication number | Publication date |
---|---|
BR9705548A (pt) | 1999-02-23 |
DE19751582A1 (de) | 1998-06-18 |
MX9709047A (es) | 1998-08-30 |
KR19980046931A (ko) | 1998-09-15 |
TW449766B (en) | 2001-08-11 |
US5998918A (en) | 1999-12-07 |
KR100199557B1 (ko) | 1999-06-15 |
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