CN1797524A - 有机发光二极管显示器 - Google Patents
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- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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Abstract
本发明公开了一种减少数据驱动器输出数量的有机发光二极管显示器(OELD)。该OELD包括彼此交叉的数据线和扫描线。在数据线和扫描线之间的像素区域以矩阵形式设置包含有机电致发光二极管的像素单元,所述像素单元在垂直方向上以不同颜色排列并在水平方向上以同样颜色排列。数据驱动器向数据线施加数据。扫描驱动器向扫描线施加扫描信号。
Description
本申请要求享有2004年12月29日在韩国递交的申请号为P2004-115729的申请的权益,在此引用其全部内容作为参考。
技术领域
本发明涉及一种有机发光二极管显示器,特别涉及一种适用于减少数据驱动器通道数量从而便于将数据驱动器连接到面板上并降低制造成本的有机发光二极管显示器。
背景技术
近来已经研发了多种平板显示器。和传统阴极射线管器件相比这些平板显示器具有减小的重量和体积。该平板显示器的实施例包括液晶显示器、场发射显示器、等离子显示面板、电致发光(以下,称为“EL”)显示器等。
EL显示器为通过电子和空穴的复合荧光物质发光的自发光器件。通常该EL显示器分为采用无机化合物作为荧光物质的无机EL显示器和采用有机化合物作为荧光物质的有机EL显示器。由于该EL显示器具有诸如驱动电压低、自发光、薄、宽视角、响应速度快并且高对比度等多个优点因此该EL显示器有望成为下一代显示器。
图1所示为用于说明有机EL显示器的有机发光二极管原理的截面图。该有机EL显示器的有机发光二极管包括由低功函金属形成的阴极2;由基板上透明导电材料形成的阳极14;以及电子注入层4、电子传输层6、发光层8、空穴传输层10和空穴注入层12。
如果在透明阳极14和不透明金属阴极2之间施加电压,由阴极2产生的电子通过电子注入层4和电子传输层6迁移到发光层8。
同样,由阳极14产生的空穴通过空穴注入层12和空穴传输层10迁移到发光层8。
因此,由电子传输层6和空穴传输层10施加的电子和空穴在发光层彼此碰撞并复合以产生光。光通过阳极14向外界发光从而显示图像。有机EL显示器的亮度与流过阳极4和阴极2之间的电流成比例。
如图2所示,该有机EL显示器包括具有设置于由扫描线SL1到SLn和数据线DL1到DLm交叉限定的各个区域的像素单元PE的EL显示面板16;用于驱动扫描线SL1到SLn的扫描驱动器18;以及用于驱动数据线DL1到DLm的数据驱动器20。
由于实现数据驱动器20很难集成在有机EL显示器中,因此该数据驱动器20的通道数量和数据线DL1到DLm的数量是一一对应的。
因此,现有技术有机EL显示器采用数量上与水平分辨率×3RGB对应的连接线实现数据驱动器20和数据线DL1到DLm的一对一连接。从而,随着显示器水平分辨率的提高,连接线的数量也随之增加。结果,现有技术EL显示器的数据驱动器通道数量对应于水平分辨率的增加而不断增加。导致的问题在于很难将具有增加通道数量的数据驱动器20和数据线DL1到DLm一一连接起来。
发明内容
仅作为介绍,根据本发明一个方面的有机发光二极管显示器包括彼此交叉的多条数据线和多条扫描线,以矩阵形式设置于数据线和扫描线之间的像素区域中的多个像素单元,该像素单元包括有机电致发光二极管,该像素单元在垂直方向上以不同颜色排列并在水平方向上以相同颜色排列,用于向数据线施加数据的数据驱动器,以及用于向扫描施加扫描信号的扫描驱动器。
根据本发明另一方面,有机发光二极管显示器件包括具有彼此交叉的多条数据线和多条扫描线和位于数据线和扫描线之间的像素区域以矩阵形式设置的多个像素单元的显示面板,所述像素单元包含有机电致发光二极管;所述像素单元在垂直方向以不同颜色排列和在水平方向以同样颜色排列。
根据本发明另一方面的有机发光二极管显示器的驱动方法包括提供包含多条数据线、与数据线交叉以形成多个像素单元的多条扫描线、包含有机发光二极管的像素单元的显示面板,该像素单元在垂直方向以不同颜色排列并在水平方向以同样颜色排列;向数据线提供数据;以及向像素单元的扫描线提供扫描信号。
附图说明
通过参照附图对实施方式进行详细描述将使本发明变得更加显而易见,其中:
图1所示为通常的有机发光二极管;
图2所示为传统显示器的电路图;
图3所示为根据本发明第一实施方式的有机发光二极管显示器的电路图;
图4所示为图3的像素单元的电路图;以及
图5所示为根据本发明实施方式的有机发光二极管显示器电路图。
具体实施方式
现在要详细说明本发明的优选实施方式,所述实施方式的实施例示于附图中。
通过参照图3到图5,本发明的实施方式说明如下。
图3所示为根据本发明第一实施方式的有源矩阵型有机发光二极管显示器的电路图。
参照图3,根据本发明第一实施方式的有源矩阵型有机发光二极管显示器包括施加扫描信号的扫描线SL1到SL3n、与扫描线SL1到SL3n交叉设置的数据线DL1到DLm/3、在扫描线SL1到SL3n和数据线DL1到DLm/3各交叉区域垂直排列有RGB像素单元PE的EL显示面板116、用于驱动扫描线SL1到SL3n的扫描驱动器118、用于驱动数据线DL1到DL m/3的数据驱动器120。
每个像素单元PE均设置于扫描线SL1到SL3n和数据线DL1到DLm/3的交叉区域并响应于来自各相关栅线和数据线的信号而发光,从而实现图像。具体地,响应于顺序施加给扫描线SL1到SL3n的负扫描信号和施加给数据线DL1到DLm/3的正数据信号发光。另一方面,在通过施加给扫描线SL1到SL3n的高电压施加反向电压的像素单元PE不发光。
在水平方向排列像素单元PE并在垂直方向重复排列RGB像素单元。如图4所示,该像素单元PE利用像素驱动电路130转换诸如由扫描线SL1到SL3n施加的扫描信号、由数据线DL1到DLm/3施加的数据信号、由外界施加的高电位电压VDD和低电位电压VSS,从而控制发光二极管EL的发光。该像素驱动电路130至少由一个薄膜晶体管构成。
对于各扫描线,将扫描信号从扫描驱动器118顺序施加给扫描线SL1到SL3n。扫描线SL1到SL3n的数量与垂直分辨率相对应。例如,对于具有176×220分辨率的EL显示面板,垂直排列RGB像素单元PE使得该垂直分辨率具有220×3(RGB)=660的分辨率,因此具有660条扫描线SL1到SL3n。
数据线DL1到DLm/3接收从数据驱动器120输入的视频数据信号同时将扫描信号顺序施加给扫描线SL1到SL3n。数据线DL1到DLm/3的数量与水平分辨率相对应。采用上述实例,对于具有176×220分辨率的EL显示面板,将该RGB像素单元PE垂直排列,该水平分辨率为176,因此具有176条数据线DL1到DLm/3。在和现有技术比较数据线数量时,如图2所示现有技术具有在水平方向上以R、G、B顺序排列的像素单元PE以及垂直方向上同样颜色的像素,相反本发明在垂直方向以R、G、B顺序排列像素单元PE并在水平方向排列同样颜色像素。因此,数据线的数量减少为现有技术的1/3,并且数据驱动器的输出通道数量同样降低。
该扫描驱动器118与各扫描线SL1到SL3n连接以施加扫描信号。扫描驱动器118具有垂直排列的RGB像素单元,从而具有对应于增加的扫描线Sl1到SL3n的通道。
数据驱动器120与各数据线Dl1到DLm/3连接以从外界向数据线DL1到DLm/3施加视频数据信号。
根据具有该结构的本发明第一实施方式的有源矩阵型EL显示器件可以将数据线DL1到DLm/3的数量减少为现有技术的1/3。因此即使对于高分辨率来说数据线DL1到DLm/3数量已经提高,但是将数据驱动器120连接到EL显示面板116上还是比较容易的。
图5所示为根据本发明第二实施方式的有源矩阵型有机发光二极管显示器电路图。
参照图5,根据本发明第二实施方式的有源矩阵型有机发光二极管显示器包括施加扫描信号的扫描线SL1到SL3n、与扫描线SL1到SL3n交叉设置的数据线DL1到DLm/3、在扫描线SL1到SL3n和数据线DL1到DLm/3的各交叉区域垂直排列有RGB像素单元的EL显示面板216、和扫描线SL1到SL3n形成于同一表面用于驱动该扫描线SL1到SL3n的扫描驱动器218、以及用于驱动数据线DL1到DLm/3的数据驱动器220。
各像素单元PE设置于扫描线SL1到SL3n和数据线DL1到DLm/3的各交叉区域并响应于来自各条线的信号发光,从而实现图像。具体地,响应于顺序施加给扫描线SL1到SL3n的负扫描脉冲以及施加给数据线DL1到DLm/3的正数据信号发光。另一方面,在通过施加给扫描线SL1到SL3n的高电压施加反向电压的像素单元PE中不发光。
在水平方向排列像素单元PE,并在垂直方向重复排列RGB像素单元。如图4所示,该像素单元PE利用像素驱动电路130转换诸如由扫描线SL1到SL3n施加的扫描信号、由数据线DL1到DLm/3施加的数据信号、由外界施加的高电位电压VDD和低电位电压VSS,从而控制发光二极管EL的发光。该像素驱动电路130至少由一个薄膜晶体管构成。
对于各扫描线,将扫描信号从扫描驱动器218顺序施加给扫描线SL1到SL3n。该扫描线SL1到SL3n的数量与垂直分辨率相对应。例如,对于具有176×220分辨率的EL显示面板,垂直排列RGB像素单元PE使得该垂直分辨率为220×3(RGB)=660,因此具有660条扫描线SL1到SL3n。
数据线DL1到DLm/3接收从数据驱动器220输入的视频数据信号同时将扫描信号顺序施加给扫描线SL1到SL3n。数据线DL1到DLm/3的数量与水平分辨率相对应。例如,对于具有176×220分辨率的EL显示面板,将RGB像素单元PE垂直排列,该水平分辨率为176,因此具有176条数据线DL1到DLm/3。
在形成扫描线SL1到SL3n的基板上嵌入扫描驱动器218,并将该扫描驱动器与各扫描线SL1到SL3n连接以施加扫描信号。扫描驱动器218具有垂直排列的RGB像素单元,从而具有对应于增加的扫描线SL1到SL3n的通道。
更具体地,该扫描驱动器218包括连接到各扫描线SL1到SL3n上的移位寄存器SR1到SR3n、用于转换由外界施加的扫描信号电压电平并提供给各移位寄存器SR1到SR3n的电平转换器L/S、以及用于控制电平转换器L/S信号提供的时钟CLK。根据具有该结构的本发明实施方式的扫描驱动器218根据时钟CLK的控制转换由外界施加的扫描信号电平以将该扫描信号转换为基本适用于该EL显示面板216的信号大小。由电平转换器L/S转换的信号经由各移位寄存器SR1到SR3n延迟并顺序施加给各扫描线SL1到SL3n。这里,扫描驱动器218内的薄膜晶体管和包括在用于驱动像素单元PE的像素驱动电路130中的薄膜晶体管可以同时形成。
数据驱动器220与各数据线DL1到DLm/3连接以从外界向数据线DL1到DLm/3施加视频数据信号。
和现有技术比较,根据具有该结构的本发明第二实施方式的有源矩阵型EL显示器可以将数据线的数量减少为现有技术的1/3,因此对于高分辨率即使数据线DL1到DLm/3数量有所增加,但是将数据驱动器220连接到EL显示面板216已变得更加容易。此外,在基板上直接形成扫描驱动器218以减少制造成本,并且通过简化制造工序可以降低制造单位价格。
根据本发明实施方式的EL显示器通过采用非晶硅或者多晶硅形成薄膜晶体管的有源层。非晶硅具有相对好的均匀性和稳定特性。多晶硅具有高电荷迁移率,从而允许该多晶硅型EL显示器的像素密度增加。此外,在EL显示面板上安装采用响应速度相对较快的驱动电路以降低制造单元成本。
如上所述,该EL显示器垂直排列RGB像素单元以减少数据线数量。因此,对于高分辨率即使数据线数量有所增加,但连接到数据驱动器的数据线数量降低为现有技术的1/3。因此将数据驱动器连接到数据线上变得更加容易。此外,该EL显示器在和形成扫描线的显示部分相同的基板上形成扫描驱动器。因此,可以避免使用将扫描线连接到扫描驱动器上的额外电路。因此,根据本发明实施方式的EL显示器可以快速地向扫描线施加扫描信号,即,具有高响应速度,并且可以降低制造成本。
尽管已经通过附图所述的实施方式对本发明进行了说明,但是应该理解,对于熟悉本领域的普通技术人员来说,本发明不限于这些实施方式,在不脱离本发明精神的情况下可以对本发明进行各种变型和改进。因而,只有通过所附权利要求以及等效物才能限定本发明的范围。
Claims (19)
1、一种有机发光二极管显示器,包括:
彼此交叉的多条数据线和多条扫描线;
以矩阵形式设置于数据线和扫描线之间像素区域中的多个像素单元,所述像素单元包括有机电致发光二极管,所述像素单元在垂直方向上以不同颜色排列并在水平方向上以同样颜色排列;
用于向数据线施加数据的数据驱动器;以及
用于向扫描施加扫描信号的扫描驱动器。
2、根据权利要求1所述的有机发光二极管显示器,其特征在于,
所述像素单元包括红像素单元、绿像素单元和蓝像素单元,并且
所述像素单元在垂直方向以红、绿和蓝色顺序重复排列。
3、根据权利要求1所述的有机发光二极管显示器,其特征在于,所述扫描驱动器包括:
用于改变由外界输入的扫描信号电平的电平转换器;
用于顺序向所述扫描线施加由电平转换器输出的信号的移位寄存器;以及
用于控制所述电平转换器和移位寄存器的控制信号。
4、根据权利要求1所述的有机发光二极管显示器,其特征在于,还包括用于驱动所述像素单元的像素驱动薄膜晶体管,所述像素驱动薄膜晶体管和包括在扫描驱动器中的薄膜晶体管均包括多晶硅层或者非晶硅层至少其中之一。
5、根据权利要求1所述的有机发光二极管显示器,其特征在于,所述显示器具有m/3×n的分辨率,在所述显示器上显示p种不同颜色,所述数据驱动器具有m/3个输出,并且所述扫描驱动器具有p×n个输出。
6、根据权利要求5所述的有机发光二极管显示器,其特征在于,p=3。
7、根据权利要求6所述的有机发光二极管显示器,其特征在于,所述像素单元的颜色为红、绿和蓝。
8、根据权利要求5所述的有机发光二极管显示器,其特征在于,所述从数据驱动器和扫描驱动器输出数量分别与水平方向和垂直方向的像素单元数量一一对应。
9、根据权利要求1所述的有机发光二极管显示器,其特征在于,所述各像素单元包括设置的像素驱动薄膜晶体管使得所述有机电致发光二极管通过所述像素驱动薄膜晶体管与相关的扫描线和数据线连接。
10、一种有机发光二极管显示器,包括:
具有彼此交叉的多条数据线和多条扫描线和位于数据线和扫描线之间的像素区域以矩阵形式设置的多个像素单元的显示面板,所述像素单元包含有机电致发光二极管;
其中,所述像素单元在垂直方向以不同颜色排列和在水平方向以同样颜色排列。
11、根据权利要求10所述的有机发光二极管显示器,其特征在于,所述显示器具有m×n的分辨率,在所述显示器上显示p种不同颜色,在水平方向的像素数量为m个,并且在垂直方向上的像素数量为p×n个。
12、根据权利要求11所述的有机发光二极管显示器,其特征在于,p=3。
13、根据权利要求12所述的有机发光二极管显示器,其特征在于,所述像素单元的颜色为红、绿和蓝。
14、一种有机发光二极管显示器的驱动方法,方法包括:
提供具有多条数据线、与数据线交叉以形成多个像素单元的多条扫描线、包含有机发光二极管的像素单元的显示面板,所述像素单元在垂直方向以不同颜色排列并在水平方向以同样颜色排列;
向数据线提供数据;并且
向像素单元的扫描线提供扫描信号。
15、根据权利要求14所述的方法,其特征在于,
所述像素单元包括红像素单元、绿像素单元和蓝像素单元,并且
所述像素单元在垂直方向以红、绿和蓝色顺序重复排列。
16、根据权利要求14所述的方法,其特征在于,所述显示器具有m×n的分辨率,在所述显示器上显示p种不同颜色,所述数据驱动器具有m个输出,并且扫描驱动器具有p×n个输出。
17、根据权利要求16所述的方法,其特征在于,p=3。
18、根据权利要求17所述的方法,其特征在于,所述像素单元的颜色为红、绿和蓝。
19、根据权利要求16所述的方法,其特征在于,所述数据驱动器和扫描驱动器的输出数量分别与水平方向和垂直方向的像素单元数量一一对应。
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CN105118430A (zh) * | 2015-08-31 | 2015-12-02 | 上海和辉光电有限公司 | 像素驱动电路及其驱动方法和显示装置 |
CN106249496A (zh) * | 2016-08-31 | 2016-12-21 | 深圳市华星光电技术有限公司 | 像素单元、像素驱动电路及驱动方法 |
CN113012629A (zh) * | 2020-12-08 | 2021-06-22 | 重庆康佳光电技术研究院有限公司 | 显示面板及电子设备 |
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JP2008209886A (ja) * | 2007-02-23 | 2008-09-11 | Samsung Sdi Co Ltd | 有機電界発光表示装置及びその駆動方法 |
CN103346151B (zh) * | 2013-06-14 | 2017-03-01 | 合肥瑞华电子科技有限责任公司 | 组合型led灯珠的封装结构 |
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CN105118430A (zh) * | 2015-08-31 | 2015-12-02 | 上海和辉光电有限公司 | 像素驱动电路及其驱动方法和显示装置 |
CN105118430B (zh) * | 2015-08-31 | 2018-05-25 | 上海和辉光电有限公司 | 像素驱动电路及其驱动方法和显示装置 |
CN106249496A (zh) * | 2016-08-31 | 2016-12-21 | 深圳市华星光电技术有限公司 | 像素单元、像素驱动电路及驱动方法 |
CN106249496B (zh) * | 2016-08-31 | 2020-02-18 | 深圳市华星光电技术有限公司 | 像素单元、像素驱动电路及驱动方法 |
CN113012629A (zh) * | 2020-12-08 | 2021-06-22 | 重庆康佳光电技术研究院有限公司 | 显示面板及电子设备 |
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