CN1201159A - Lcd装置及其颜色调整方法 - Google Patents
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Abstract
一个包括LCD面板的LCD装置,该LCD面板其上有液晶单元和一个彩色滤光片;以及多个安装在该LCD面板后部用于后光照的荧光灯,使得由该荧光灯产生的光线的波长分布不同。这样,用户可以容易和精确地调整颜色。尤其是,可以根据用户的喜好或环境来调整颜色,因此改善了图象。
Description
本发明涉及一种LCD装置及其一种颜色调整方法。并且尤其涉及一种具有多个不同色坐标的灯,以实现颜色调整的LCD装置,及其一种颜色调整方法。
通常,有各种方式来显示信息,使用装置例如CRT、利用热离子和荧光物质的光发射、VFD、LCD、PDP等。在这些装置中,LCD装置目前被广泛使用,这是由于它有很多优点,例如,功耗比其它显示装置低,可以制造各种尺寸,可以以多种方式形成一种显示图案,可以低电压工作,并且很容易与LSI(C-MOS)接口。
但是,由于一个普通的LCD装置是一种光接收型光发射装置,通过接收外部的光而不是通过自身发光来成象,因此该象在暗处观察不到。这样,一个照明装置必须安装在该LCD装置的后表面,使得该象可以在暗处观察到。
作为该LCD装置的后光照的照明光源,可以使用一个点光源例如一个白炽灯,或一个白光卤素灯;一个线光源,例如一个荧光灯(热阴极或冷阴极);或一个面光源例如矩阵方式的LED。该荧光灯的灯中密封有汞和稀有气体。当灯放电时,汞发射紫外线,与覆盖在灯管内表面的荧光物质碰撞,而发出可见光。该稀有气体通常为氩气并且密封是用来控制放电过程中的电子速度以及限制电极的喷溅。
用于LCD装置的后光照根据光源的放置可以分为边缘型和底侧型。在边缘型中,一个线光源的荧光灯放置在一个显示表面的边缘,而在底侧型中,一个或多个光源放置在该显示表面的底侧。
图1A和1B是分别具有底侧型和边缘型光源的后光照的LCD装置的分解透视图。
图1A显示与底侧型后光照对应的一种情况,这种底侧型后光照应用于当需要高亮度的时候,例如在一个彩色LCD电视中。一个LCD面板13具有相对着的底层,在底层上形成一个条形的电极,并且在底层中间充满了液晶。灯11放置在LCD面板13的下面并且落在LCD面板13表面上的光通过利用一个反射板14和一个漫射板15变得均匀。从灯11发出的光被反射板14反射,被漫射板15漫射,并且通过LCD面板13有选择地传播。
图1B显示与边缘型后光照对应的一种情况,这种边缘型后光照应用于当光的均匀性比其亮度更重要的时候。灯14放置在LCD面板13的边缘并且灯14发出的光通过一个光传播板12例如丙烯酸树脂直接到达LCD面板13。这里,光传播板12的作用可以通过在该光传播板12的上和下表面贴上一个散射板和一个反射板(没有显示)来增强。
彩色LCD装置具有一个彩色滤光片。该彩色滤光片可以与图1A和1B中显示的LCD面板13制成一体。该彩色滤光片由象素组成,每个象素具有红(R)、绿(G)和蓝(B)颜色的滤光片元件,以传播穿过液晶单元的后光照中特殊波长范围的光。该液晶单元中的液晶根据所加的液晶驱动电压倾斜一个预定的角度。当通过该液晶单元时,后光照根据该液晶的倾斜通过R、G和B彩色滤光片之一。通过滤光片的光在每个象素产生一种颜色的光,使得多个象素一起组成颜色。
图2是一个曲线图,显示一个用于后光照的荧光灯以及一个彩色滤光片关于光传播波长的相对光强。
当荧光灯后光照发出的光被分开,在彩色滤光片中有选择地传播的特殊区域的波长范围对应的区域出现波长峰值。即,用于后光照的普通荧光灯,通过覆盖一层混合三种发射红(R)、绿(G)和蓝(B)光的稀土元素制成的荧光物质来制造。从这样一个荧光灯发出的光整个是白色的。从该荧光灯产生的白光有选择地通过滤光片传播,以发出任意颜色的光。这里,如果白光被分开,将在与通过彩色滤光片上的R、G和B滤光片传播的光的传播区域一致的整个波长分布上,产生关于相对光强的一对峰值。即,如图2所示,荧光灯产生的光的峰值分别位于大约450nm、540nm和610nm处,与R、G和B颜色的光传播区域对应。在荧光灯的波长分布中形成峰值的区域可以在荧光灯的制造过程中任意改变。
根据常规技术,为了调整以上结构的LCD装置中显示的颜色,需安装具有所需颜色的荧光灯。即,通过选择覆盖在荧光灯上的荧光物质,在波长分布中具有不同峰值的不同的灯被用作后光照。例如,当要制造一个显示蓝色的精确再现的LCD装置时,只能安装一个在波长分布尤其是在兰色滤光片的传播波长区域具有较大峰值的荧光灯后光照。但是,由于这个方法仅在LCD装置的制造过程中进行,因此没有机会涉及用户。即,用户不能任意调整LCD装置的颜色,因此不可能调整颜色以适应使用LCD装置的环境的变化。
为了解决以上问题,本发明的一个目的是提供允许任意调整颜色的LCD装置。
本发明的另一个目的是提供具有多个后光照以具有不同的波长峰值的LCD装置。
本发明还有另一个目的是提供通过改变加到后光照的电流来调整LCD装置的颜色的方法。
因此,为了达到第一和第二目的,这里提供了一个LCD装置,包括一个LCD面板,其上有液晶单元和一个彩色滤光片以及多个安装在该LCD面板后部用于后光照的荧光灯,使得由荧光灯产生的光线的波长分布不同。
本发明更优越的是用于后光照的多个荧光灯的其中一个是通过混合三种发出红(R)、绿(G)和蓝(B)颜色光线的第一稀土荧光物质制成,并且另一个荧光灯是通过有选择地混合一或两种发出红(R)、绿(G)和蓝(B)光线的稀土荧光物质制成,具有与该三种第一稀土荧光物质相同或不同的波长分布。
为了达到第三目的,这里提供了一种方法,用于调整一个具有LCD面板的LCD装置的颜色,该LCD面板其上有液晶单元和一个彩色滤光片,以及多个安装在该LCD面板后部用于后光照的荧光灯,使得由荧光灯产生的光线的波长分布不同,其中通过LCD面板传播的光线的颜色通过独立地改变加在每个用于后光照的多个荧光灯上的电流来调整。
本发明的上述目的和优点通过参考附图详细描述其中一个理想的实施例将会更明显,其中:
图1A和1B是说明根据常规技术的LCD装置的分解透视图;
图2是一个曲线图,显示关于彩色滤光片和荧光灯的相对光强与波长之间的关系;以及
图3是说明根据本发明的一个理想实施例的LCD装置的分解透视图;以及
图4是说明根据本发明的另一个理想实施例的LCD装置的分解透视图。
参考显示一个底侧型LCD装置的图3,根据本发明的一个理想实施例的LCD装置的结构与图1A中显示的完全类似。一个液晶单元和一个彩色滤光片位于LCD面板33上,并且一个用于漫射由后光照产生的光的漫射板35位于LCD面板下。一个用于反射由后光照产生的光的反射板34位于后光照下。由后光照产生的光与反射板34和漫射板35相互作用,有选择地通过LCD面板33传播。光的均匀性可以通过在漫射板35上形成不均匀,或通过安装一个溅射的铝膜来改变光线的均匀性而提高。参考数字36指示一个反相器电路装置,用于将电压加到后光照上。
根据本发明的LCD装置的特性,安装了具有不同波长分布的多个后光照。在图3显示的实施例中,安装了两个U形的荧光灯31a和31b。在另一个实施例中,可以安装两个或更多的荧光灯并且其形状可以以不同方式改变。
当荧光灯31a和31b发出的光线用光谱表示时,光线形成不同的波长分布。例如,一个荧光灯31a通过覆盖具有如图2所示的标准波长分布的稀土荧光物质而制成,并且另一个荧光灯31b通过覆盖一或两种荧光物质而制成,每种荧光物质具有与灯31a上覆盖的物质相同或不同的波长分布。例如,当荧光灯31b通过覆盖仅一种蓝色荧光物质而制成时,用户可以适当地调整LCD装置的颜色以获得蓝色的精确再现。即,由于通过蓝色滤光片的亮度随加在荧光灯31b的电流的增加而增加,因此蓝色的再现比红色或绿色好。
在另一个实施例中,荧光灯31b通过混合上述所有三种荧光物质而制成,并且波长分布制成不相同。在这种情况下,通过独立地增大或减小加在各个荧光灯31a和31b上的电流,可以调整红、绿或蓝色的亮度,并且这样可以根据用户的需要再现一种特殊颜色。
对于各个荧光灯的电流的调整可以通过一个众所周知的方法实现,并且该方法和该调整可以更适宜地被用户获得。例如,用于选择多个颜色调整模式之一的附加装置安装在一个LCD装置中使得颜色的再现基于用户选择的模式而不同。同样,如图4所示,当一个边缘型后光照实现颜色调整时,可以安装多个荧光灯。这里,参考数字41a和41b表示用于后光照的荧光灯,其稀土荧光物质具有不同的波长分布,并且参考数字42表示一个漫射板。
如上所述,根据依据本发明的LCD装置及其颜色调整方法,可以容易和精确地调整颜色,并且这种调整可以由用户进行。尤其是,可以根据用户的喜好或环境来调整颜色,因此改善了图象。
要注意的是本发明不仅仅限于上述理想的实施例,并且显然熟练的技术人员做出的变化和修改包含在附加的权利要求书中所限制的本发明的精神和范围以内。
Claims (5)
1.一个LCD装置,包括:
一个LCD面板,其上有液晶单元和一个彩色滤光片;以及
多个安装在所述LCD面板后部用于后光照的荧光灯,使得由所述荧光灯产生的光线的波长分布不同。
2.如权利要求1所述的LCD装置,其中用于后光照的所述荧光灯的其中一个是通过混合三种发出红(R)、绿(G)和蓝(B)颜色光线的第一稀土荧光物质制成,并且另一个荧光灯是通过有选择地混合一或两种发出红(R)、绿(G)和蓝(B)光线的稀土荧光物质制成,具有与所述三种第一稀土荧光物质不同的波长分布。
3.如权利要求1所述的LCD装置,其中用于后光照的所述荧光灯的其中一个是通过混合三种发出红(R)、绿(G)和蓝(B)颜色光线的第一稀土荧光物质制成,并且另一个荧光灯是通过有选择地混合一或两种发出红(R)、绿(G)和蓝(B)光线的稀土荧光物质制成,具有与所述三种第一稀土荧光物质相同的波长分布。
4.如权利要求1所述的LCD装置,其中用于后光照的所述荧光灯的其中一个是通过混合三种发出红(R)、绿(G)和蓝(B)颜色光线的第一稀土荧光物质制成,并且另一个荧光灯是通过混合三种发出红(R)、绿(G)和蓝(B)光线的稀土荧光物质制成,具有与所述三种第一稀土荧光物质不同的波长分布。
5.一种用于调整一个具有LCD面板的LCD装置颜色的方法,该LCD面板其上有液晶单元和一个彩色滤光片,以及多个安装在所述LCD面板后部用于后光照的荧光灯,使得由所述荧光灯产生的光线的波长分布不同,其中通过所述LCD面板传播的光线的颜色通过独立地改变加在每个用于后光照的所述多个荧光灯上的电流来调整。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019970023126A KR19990000306A (ko) | 1997-06-04 | 1997-06-04 | 액정 표시 장치 및 그것의 색 조절 방법 |
KR23126/97 | 1997-06-04 |
Publications (1)
Publication Number | Publication Date |
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CN1201159A true CN1201159A (zh) | 1998-12-09 |
Family
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Application Number | Title | Priority Date | Filing Date |
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CN98109637A Pending CN1201159A (zh) | 1997-06-04 | 1998-06-03 | Lcd装置及其颜色调整方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US6050704A (zh) |
JP (1) | JPH117017A (zh) |
KR (1) | KR19990000306A (zh) |
CN (1) | CN1201159A (zh) |
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-
1997
- 1997-06-04 KR KR1019970023126A patent/KR19990000306A/ko not_active Application Discontinuation
-
1998
- 1998-06-02 JP JP10152694A patent/JPH117017A/ja not_active Withdrawn
- 1998-06-02 US US09/088,676 patent/US6050704A/en not_active Expired - Fee Related
- 1998-06-03 CN CN98109637A patent/CN1201159A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
JPH117017A (ja) | 1999-01-12 |
KR19990000306A (ko) | 1999-01-15 |
US6050704A (en) | 2000-04-18 |
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