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CN1185081A - 具有荧光屏的投影系统 - Google Patents

具有荧光屏的投影系统 Download PDF

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CN1185081A
CN1185081A CN97113891A CN97113891A CN1185081A CN 1185081 A CN1185081 A CN 1185081A CN 97113891 A CN97113891 A CN 97113891A CN 97113891 A CN97113891 A CN 97113891A CN 1185081 A CN1185081 A CN 1185081A
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ray tube
projection system
light
cathode ray
optical projection
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都永洛
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Samsung SDI Co Ltd
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Samsung Electron Devices Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86Vessels; Containers; Vacuum locks
    • H01J29/89Optical or photographic arrangements structurally combined or co-operating with the vessel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/74Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7425Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being a dielectric deformable layer controlled by an electron beam, e.g. eidophor projector
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18Luminescent screens
    • H01J29/30Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18Luminescent screens
    • H01J29/30Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines
    • H01J29/32Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television
    • H01J29/322Luminescent screens with luminescent material discontinuously arranged, e.g. in dots, in lines with adjacent dots or lines of different luminescent material, e.g. for colour television with adjacent dots
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00Cathode ray tubes; Electron beam tubes
    • H01J31/08Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Luminescent Compositions (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Projection Apparatus (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种具有荧光屏的投影系统,其包括阴极射线管、光学单元及荧光屏;阴极射线管形成影像并发光;光学单元依预定比例放大并投射由阴极射线管所发出的光;荧光屏显示影像;阴极射线管被设计成以预定波长发光,且荧光屏涂覆有被阴极射线管以预定波长所发出的并通过光学单元的光激化的荧光物质。

Description

具有荧光屏的投影系统
本发明涉及一种投影系统。
通常,投影系统是一种在屏幕上呈现影像的设备。一种投影系统使用铁电液晶显示器(FLCD),其使用随机存取记忆体(RAM),另一种使用红R、绿G及蓝B阴极射线管(CRT),其投射光线通过一光学单元以显示影像。本发明特别涉及后者。
参考图2所示,现有CRT型投影系统包括红R、绿G及蓝B阴极射线管2、一光学单元4及一屏幕6。光学单元4放大并以预定比例投射来自阴极射线管2的光。通过光学单元4的光被射向屏幕6且显示在屏幕6上。
在构造如上所述的现有CRT型投影系统中,因为在屏幕上的影像是反射的,可看到的影像的角度受限制,且在某些角度,影像被扭曲或不够亮。
此外,在现有投影系统中,由于影像光在影像的颜色已被有色的CRT产生且被光学单元反射的情况下被传送至屏幕上,影像清晰度及亮度退化,因此限制视觉范围。
最后,现有投影机因使用三支分开的阴极射线管而复杂、大型且沉重。
本发明的目的是解决上述问题。
本发明的目的在于提供一种投影系统,其使用涂覆有荧光层的荧光屏,由预定波长的光激化,可改善荧光屏的品质、亮度及使用者视觉范围,以使该投影系统甚至可被用在小型投影机里。
为达成上述目的,本发明提供一种投影系统。该投影系统包括:阴极射线管,以形成影像并依预定波长发光;光学单元,以预定比例放大并投射从阴极射线管发出的光;荧光屏,其涂覆有由红、绿及蓝荧光物质构成的荧光层,且被以预定波长通过光学单元的光激化而发出荧光。
阴极射线管发出波长为200至420nm的紫外线。此外,阴极射线管配备滤光片而仅允许所需波长的光通过,且有以沉积法涂覆在它上面的荧光层以发出紫外线。
阴极射线管的荧光层是选自Y2SiO5:Ce(400nm),Y2Si2O7:Ce(385nm),HfO2:Ti(400nm),Zn2SiO2:Ti(400nm),ZnGa2O4:(Li,Ti)(380nm),SrMgP2O7:Eu(394nm),Ca2MgSi2O7;Pb(349nm),Sr2MgSi2O7:Pb(326nm),Ba2MgSi2O7:Pb(376nm,322nm),Ca2ZnSi2O7:Pb(347nm),Sr2ZnSi2O7:Pb(326nm),Ba2ZnSi2O7:Pb(328nm),BaSi2O5:Pb(349nm),CaSiO3:Pb(α-379nm,β-337nm),Ca2SiO4:Pb(β-325nm),SrSiO4:Pb(320nm),Ba2SiO4:Pb(268nm),BaSi2O7:Pb,Ca2P2O7:Sn(β-369nm),Sr3P2O8:Sn(α-394nm,345nm),YPO4:Ce(330nm,365nm),GdPO4:Ce(320nm,344nm),LaPO4:Ce(317nm,339nm),LaBO3:Ce(317nm,352nm,376nm),ScBO3:Ce(328nm,373nm),YAl2B4O12:Ce(344nm,368nm),Ca2MgSi2O7:Ce(370nm,400nm),Sc2Si2O7:Ce(337nm,405nm),SrAl12O19:Eu(395nm),Y2O3:Gd(315nm),CaS:Eu(375nm),CuO:Eu(375nm)。
荧光屏涂覆有被波长为200至420nm的光激化的红、绿及蓝荧光物质。在荧光屏内的红荧光物质R选自Y2O2S:Eu3+,La2O2S:Eu3+,Y2O3:Eu3+,3.5MgO×0.5MgF2×GeO2:Mn4+,YVO4:Eu3+,SrY2S4:Eu3+,K5Eu(WO4)4;绿荧光物质G选自SrAl2O4:Eu2+,SrGa2S4:Eu2+,Y3Al5O12:Ce3+,ZnS:Cu,ZnS:(Cu,Al),ZnS:(Cu,Al,Au),Zn2GeO4:Mn2+,(Ca,Mg,Sr)3MgSi2O8:Eu2+,(Ca,Mg,Sr)SiO4:Eu2+,La2O2S:Tb3+,Y2O2S:Tb3+;蓝荧光物质B选自Sr10(PO4)6Cl2:Eu2+,(Sr0.9Ca0.1)10(PO4)Cl2:Eu2+,BaMg2Al16O27:Eu2+,Sr3MgSi2O8:Eu2+,Ba3MgSi2O8:Eu2+,ZnS:(Ag,Cl),ZnS:(Ag,Al),ZnS:(Ag,Ga)。
本发明还提供一光罩,其由能抵抗紫外线并吸收可见光线以防止色彩混合的材料做成,且形成使光通过的具有孔的固定图案,该光罩被设置在荧光屏与光学单元之间。
以下配合附图,描述本发明的其它目的和优点。
图1为根据本发明的最佳实施例的投影系统的示意图;
图2为现有投影系统的示意图。
参阅图1所示,其显示本发明的最佳实施例的投影系统。如图所示,本发明投影系统包括阴极射线管12、光学单元14及荧光屏16。阴极射线管12形成影像并依固定波长发光。光学单元14依预定比例放大并投射由阴极射线管12所发出的光。荧光屏16涂覆有被通过光学单元14的光激化的红、绿及蓝荧光物质。
阴极射线管12最好发出波长在200至420nm范围内的光,即阴极射线管12发出具有能激化涂覆在荧光屏16上的荧光层的波长的光(例如紫外光)。另外,有色玻璃或滤光片13被固定在阴极射线管12上而仅允许所需波长的光通过。
使用有色玻璃时,藉由添加钴(Co)、镍(Ni)及铁(Fe)至铅玻璃上,可消除可见光。另外,使用滤光片时,最好使用带通滤光器或截止滤光器,其消除具有短波长的可见光及紫外线。
阴极射线管12的结构与图2所示的现有阴极射线管2几乎相同,只是以由沉积法涂覆发出紫外线的荧光层来代替由红R、绿G及蓝B荧光物质所制成的荧光层,且以来自电子枪的电子束扫描而形成影像。
上述允许由阴极射线管12发出的紫外线的荧光层最好选自Y2SiO5:Ce(400nm),Y2Si2O7:Ce(385nm),HfO2:Ti(400nm),Zn2SiO2:Ti(400nm),ZnGa2O4:(Li,Ti)(380nm),SrMgP2O7:Eu(394nm),Ca2MgSi2O7;Pb(349nm),Sr2MgSi2O7:Pb(326nm),Ba2MgSi2O7:Pb(376nm,322nm),Ca2ZnSi2O7:Pb(347nm),Sr2ZnSi2O7:Pb(326nm),Ba2ZnSi2O7:Pb(328nm),BaSi2O5:Pb(349nm),CaSiO3:Pb(α-379nm,β-337nm),Ca2SiO4:Pb(β-325nm),SrSiO4:Pb(320nm),Ba2SiO4:Pb(268nm),BaSi2O7:Pb,Ca2P2O7:Sn(β-369nm),Sr3P2O8:Sn(α-394nm,345nm),YPO4:Ce(330nm,365nm),GdPO4:Ce(320nm,344nm),LaPO4:Ce(317nm,339nm),LaBO3:Ce(317nm,352nm,376nm),ScBO3:Ce(328nm,373nm),YAl2B4O12:Ce(344nm,368nm),Ca2MgSi2O7:Ce(370nm,400nm),Sc2Si2O7:Ce(337nm,405nm),SrAl12O19:Eu(395nm)。
用于本发明的光学单元14类似于被广泛使用的透镜单元。光学单元14适用于紫外线,且其尺寸依荧光屏及阴极射线管12的尺寸而定。
光学单元14最好被设计用来控制由阴极射线管12所发出的光形成的影像的光,以聚焦在荧光屏16的每个像素上。
荧光屏16由光刻法、薄泥旋涂法或活版印刷法所形成,这些方法都被用来形成在现有阴极射线管或等离子体显示板内的荧光层。
即,玻璃板首先被彻底清理,然后以由丙烯醛乳液、纯水、聚乙醇聚合物、重铬酸钠及环氧丙烷所组成的光敏树脂涂覆在玻璃板的内侧,且藉由干燥及扩展光敏树脂形成光敏树脂图案。光敏树脂被移走,外侧光被遮断,且以固定图案形成黑基体层以防止色彩混合,藉由把石墨沉积在如上所述形成的光敏树脂上并以过氧化氢来蚀刻,即可形成上述三者。接着,包括第一荧光颗粒、纯水及聚乙烯醇的第一荧光薄浆被沉积在黑基体层上,且通过干燥、曝光、扩展、清洗及干燥形成第一荧光物质。然后,通过相同方法形成第二、三荧光物质,以制造荧光屏16。
依据因屏幕尺寸及光种类而变的光谱分散,选择最有效的红R、绿G及蓝B荧光物质。
具有在200至420nm范围内的波长的红荧光物质R选自Y2O2S:Eu3+,La2O2S:Eu3+,Y2O3:Eu3+,3.5MgO×0.5MgF2×GeO2:Mn4+,YVO4:Eu3+,SrY2S4:Eu3+,K5Eu(WO4)4
具有在200至420nm范围内的波长的绿荧光物质G选自SrAl2O4:Eu2+,SrGa2S4:Eu2+,Y3Al5O12:Ce3+,ZnS:Cu,Zns:(Cu,Al),ZnS:(Cu,Al,Au),Zn2GeO4:Mn2+,(Ca,Mg,Sr)3MgSi2O8:Eu2+,(Ca,Mg,Sr)SiO4:Eu2+,La2O2S:Tb3+,Y2O2S:Tb3+
具有在200至420nm范围内的波长的蓝荧光物质B选自Sr10(PO4)6Cl2:Eu2+,(Sr0.9Ca0.1)10(PO4)6Cl2:Eu2+,BaMg2Al16O27:Eu2+,Sr3MgSiO8:Eu2+,Ba3MgSi2O8:Eu2+,Zns:(Ag,Cl),Zns:(Ag,Al),ZnS:(Ag,Ga)。
该投影系统是主动荧光型显示设备,其中阴极射线管12所发出的并经光学单元14放大的预定波长的光(例如紫外线)激化每个被沉积在荧光屏16上的荧光像素而产生影像。
在上述投影系统中,藉由调整光学单元14,被送至反射板(未被显示)的影像正确落在荧光屏16的荧光像素上而产生预定影像。
为避免色彩混合,最好调整光学单元14的设计值,以致仅有在荧光屏16内的每个荧光像素的90至95%尺寸可被激化。
为避免色彩混合,还可把光罩15设置在荧光屏16与光学单元14之间。光罩最好由能抵抗紫外线且吸收可见光的材料制成(例如钢或铁板或有色塑料板),且形成具有允许光通过的孔151的固定图案。
在如上述所构成的本发明投影系统中,藉由使用荧光屏,改善视野、影像及反射型显示器的亮度。
另外,由于使用荧光屏以简化光学单元及阴极射线管,投影机的尺寸及重量被减少,以致本发明可应用于可携式电脑及其他使用小型显示器的设备,且提高产能。

Claims (8)

1.一种投影系统,其包括:一阴极射线管,其形成影像并发光;一光学单元,其依预定比例放大并投射由阴极射线管所发出的光;及一荧光屏,其显示影像;其特征在于,所述阴极射线管被设计成以预定波长发光,且所述荧光屏涂覆有被阴极射线管以预定波长所发出的并通过光学单元的光激化的荧光物质。
2.如权利要求1所述的投影系统,其特征在于,所述阴极射线管发出波长在200nm至420nm范围内的紫外线。
3.如权利要求1所述的投影系统,其特征在于,所述阴极射线管包括仅允许具有预定波长的光通过的滤光片。
4.如权利要求1所述的投影系统,其特征在于,所述阴极射线管具有用沉积法涂覆在它上面的荧光层,以发出紫外线。
5.如权利要求4所述的投影系统,其特征在于,所述阴极射线管的荧光层选自Y2SiO5:Ce(400nm),Y2Si2O7:Ce(385nm),HfO2:Ti(400nm),Zn2SiO2:Ti(400nm),ZnGa2O4:(Li,Ti)(380nm),SrMgP2O7:(Eu394nm),Ca2MgSi2O7;Pb(349nm),Sr2MgSi2O7:Pb(326nm),Ba2MgSi2O7:Pb(376nm,322nm),Ca2ZnSi2O7:Pb(347nm),Sr2ZnSi2O7:Pb(326nm),Ba2ZnSi2O7:Pb(328nm),BaSi2O5:Pb(349nm),CaSiO3:Pb(α-379nm,β-337nm),Ca2SiO4:Pb(β-325nm),SrSiO4:Pb(320nm),Ba2SiO4:Pb(268nm),BaSi2O7:Pb,Ca2P2O7:Sn(β-369nm),Sr3P2O8:Sn(α-394nm,345nm),YPO4:Ce(330nm,365nm),GdPO4:Ce(320nm,344nm),LaPO4:Ce(317nm,339nm),LaBO3:Ce(317nm,352nm,376nm),ScBO3:Ce(328nm,373nm),YAl2B4O12:Ce(344nm,368nm),Ca2MgSi2O7:Ce(370nm,400nm),Sc2Si2O7:Ce(337nm,405nm),SrAl12O19 :Eu(395nm),Y2O3:Gd(315nm),CaS:Eu(375nm),CuO:Eu(375nm)。
6.如权利要求1所述的投影系统,其特征在于,沉积在荧光屏上的所述荧光物质包括被波长在200至420nm范围内的光激化的红、绿及蓝荧光物质。
7.如权利要求6所述的投影系统,其特征在于,所述红荧光物质R选自Y2O2S:Eu3+,La2O2S:Eu3+,Y2O3:Eu3+,3.5MgO×0.5MgF2×GeO2:Mn4+,YVO4:Eu3+,SrY2S4:Eu3+,K5Eu(WO4)4;所述绿荧光物质G选自SrAl2O4:Eu2+,SrGa2S4:Eu2+,Y3Al5O12:Ce3+,ZnS:Cu,ZnS:(Cu,Al),ZnS:(Cu,Al,Au),Zn2GeO4:Mn2+,(Ca,Mg,Sr)3MgSi2O8:Eu2+,(Ca,Mg,Sr)SiO4:Eu2+,La2O2S:Tb3+,Y2O2S:Tb3+;所述蓝荧光物质B选自Sr10(PO4)6Cl2:Eu2+,(Sr0.9Ca0.1)10(PO4)6Cl2:Eu2+,BaMg2Al16O27:Eu2+,Sr3MgSiO8:Eu2+,Ba3MgSi2O8:Eu2+,ZnS:(Ag,Cl),ZnS:(Ag,Al),Zns:(Ag,Ga)。
8.如权利要求1所述的投影系统,其特征在于,它还包括由能抵抗紫外线并吸收可见光的材料制成的光罩,以避免色彩混合,所述光罩形成具有允许光通过的孔的固定图案,所述光罩设置在所述荧光屏与所述光学单元之间。
CN97113891A 1996-12-12 1997-07-08 具有荧光屏的投影系统 Pending CN1185081A (zh)

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KR1019960064634A KR19980046311A (ko) 1996-12-12 1996-12-12 형광막 프로젝터
KR64634/96 1996-12-12

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JP (1) JPH10172459A (zh)
KR (1) KR19980046311A (zh)
CN (1) CN1185081A (zh)
BR (1) BR9703931A (zh)
DE (1) DE19722404A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
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JP5617288B2 (ja) * 2010-03-18 2014-11-05 セイコーエプソン株式会社 照明装置及びプロジェクター
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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
CN100375776C (zh) * 2003-05-17 2008-03-19 磷技术有限公司 含有硅酸盐荧光性磷光体的发光装置
CN109031878A (zh) * 2018-08-31 2018-12-18 苏州瑞鸥艾斯显示科技有限公司 高动态范围短焦距投影系统

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BR9703931A (pt) 1998-11-03
JPH10172459A (ja) 1998-06-26
DE19722404A1 (de) 1998-06-18
KR19980046311A (ko) 1998-09-15

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