CN101889358A - 用于显示设备的高开口率像素布局 - Google Patents

用于显示设备的高开口率像素布局 Download PDF

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CN101889358A
CN101889358A CN2008801197363A CN200880119736A CN101889358A CN 101889358 A CN101889358 A CN 101889358A CN 2008801197363 A CN2008801197363 A CN 2008801197363A CN 200880119736 A CN200880119736 A CN 200880119736A CN 101889358 A CN101889358 A CN 101889358A
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display device
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A·内森
G·R·查基
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Ignis Innovation Inc
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—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
    • G09G3/22—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
    • G09G3/30—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
    • 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]
    • G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

本发明提供了一种显示设备、像素布局及其形成方法。该显示设备包括：形成在像素阵列区域中的多个像素；以及用于向像素分配功率的电源栅格。每个像素具有发光器件和多个晶体管。电源栅格包括第一组电源线和第二组电源线。第一组电源线延伸穿过像素阵列区域。第二组电源线延伸穿过像素阵列区域并在像素阵列区域中与第一组电源线电接触。每个像素耦接到长一组电源线和第二组电源线中的至少一个电源线。

Description

用于显示设备的高开口率像素布局
技术领域
本发明涉及一种显示设备，并且更具体地涉及一种高开口率(apertureratio)的具有多个像素的显示设备。
背景技术
有源矩阵有机发光二极管(AMOLED)显示器由于具有很多的优点(例如，低温制造、制造成本低以及具有广视角的高分辨率)而变得越来越有吸引力。
图1示出了传统的AMOLED显示面板中的电源线分布。图1中的面板显示设备10包括以行和列排列的多个像素。在面板中，每列(或行)具有自己的电源线12或者与其相邻的列(或行)共享电源线。电源线12垂直地延伸并与水平布置在面板两侧的面板电源汇流条(bar)14相连接。面板电源汇流条14为电源线12提供驱动电压。每个像素利用通过相应的电源线12提供的功率来工作。
图2示出了图1的RGBW像素布局的一个实例。区域25包括像素20，像素20有四个像素部件(component)22a(白色)、22b(红色)、22c(蓝色)和22d(绿色)。每个像素部件利用通过相应电源线12提供的功率来工作。
在图2中，像素20的列与其相邻的列共享两个电源线12。因此不需要为每个列布置一个电源线。然而，在具有高电流密度的大面积显示器中，电源线12必须较宽。因此，损失了开口率，减少了面板的寿命。
发明内容
本发明的一个目的是提供一种消除或减轻现有系统的至少一个缺点的显示设备。
根据本发明的一个方面，提供一种显示设备，其包括：形成在像素阵列区域中的多个像素；以及用于向像素分配功率的电源栅格(grid)。每个像素具有发光器件和多个晶体管。电源栅格包括第一组电源线和第二组电源线。第一组电源线延伸穿过(across)像素阵列区域。第二组电源线延伸穿过像素阵列区域并在像素阵列区域中与第一组电源线电接触。每个像素与第一组电源线和第二组电源线中的至少一个电源线相耦接。
附图说明
根据以下参考附图的描述，本发明的这些和其它特征将变得更明白，在该附图中：
图1是示出传统的用于AMOLED显示面板的电源线分布布局的示意图；
图2是示出用于图1的面板的RGBW像素布局的示意图；
图3是示出根据本发明实施例的、用于显示面板的电源栅格布局的实例的示意图；
图4是示出用于图3的面板的RGBW像素布局的实例的示意图；
图5是示出用于图4的像素布局的像素电路的实例的示意图；
图6是示出具有电源栅格和图5的像素电路的RGBW像素布局的平面图；
图7是图6的RGBW像素的垂直截面图；以及
图8是图6的RGBW像素的水平截面图。
具体实施方式
下面利用具有带有OLED的像素的面板(例如，AMOLED显示面板、OLED平板)描述了本发明的实施例。然而，任何由向发光器件(或层)提供功率的电源线所驱动的显示设备均落入本发明的范围内。
在实施例中，相关的术语，例如“水平的”和“垂直的”用来描述元件之间的位置关系。然而，本领域技术人员应理解术语“水平的”和“垂直的”只是作为例子，并且可以包含例如根据像素布局的要求所确定的两个不同的方向。
参考图3，描述了根据本发明实施例的面板的电源栅格布局。图3的面板显示设备30包括电源栅格，该电源栅格可以减小每个电源线的宽度，由此降低了IR压降(IR drop)并增大了开口率。
电源栅格包括在第一方向上(例如垂直地)延伸穿过像素阵列区域的多个电源线VDDV以及在第二方向上(例如水平地)延伸穿过像素阵列区域的多个电源线VDDH。电源线VDDV和电源线VDDH在像素阵列区域中的它们的交叉点处电连接。电源线VDDV和电源线VDDH可以由不同的金属、ITO或在面板中使用的任何其它导体形成。
在图3中，面板具有矩形形状。然而，如本领域技术人员应理解的，面板可以具有与图3中的形状不同的形状。在图3中，“VDDH”在与“VDDV”垂直的方向上延伸。然而，每个“VDDH”和“VDDV”可以在不同于图3中示出的方向上延伸。本领域技术人员应理解，VDDV和VDDH的数目可以根据像素布局和电流密度而变化。
电源线VDDV和VDDH与布置在面板周边的面板VDD环32相连接。在图3中，VDD环32被形成为围绕矩形形状的面板。VDD环32具有为每个电源线VDDV、VDDH提供驱动电压的主线(main wire)。
面板可以是底部发射型显示器或顶部发射型显示器，包括用于RGB和RGBW的底部和顶部发射显示器。面板包括以行和列排列的多个像素。通过电源线VDDV和VDDH，将VDD功率均匀地分配给面板中的像素。
电源栅格提供了较好的(较低的)电阻和分配。VDDH和VDDV不需要使用宽金属。每个电源线VDDH、VDDV的宽度可以较小而有效电阻较低。
电源线VDDV和VDDH均匀地分配穿过面板的VDD电压和电流，这使得穿过面板(特别是图3的面板是高亮度的大面板时)的IR压降减到最小。
图4示出了用于图3的面板的RGBW像素布局的一个实例。在图4中，“VDDHi”(i＝n-1，n，n+1)表示与图3的VDDH对应的电源线；“VDDVj”(j＝m-1，m，m+1)表示与图3的VDDV对应的电源线。在图4中，像素区域45包括像素40，该像素40具有分别用于“白色”、“红色”、“蓝色”和“绿色”的四个像素部件(电路)42a、42b、42c和42d。电源线VDDVj和电源线VDDHi在接触点44处电连接。例如，VDDHn-1与VDDVm-1、VDDVm和VDDVm+1相连接，其中VDDVm-1、VDDVm和VDDVm+1中的每一个还与VDDHn和VDDHn+1相连接。
“白色”、“红色”、“蓝色”和“绿色”像素部件42a-42d中的每一个与多个电源线连接并使用来自上述电源线的VDD电压/电流，例如，VDDHn-1直接连接到用于白色像素部件42a的晶体管，其中VDDHn-1连接到VDDVm-1和VDDVm。VDDHn可以直接耦接到白色像素部件42a、红色像素部件42b、蓝色像素部件42c和绿色像素部件42d。可以与另一个像素(在图4中未示出)共享VDDHi。类似地，可以与另一个像素(在图4中未示出)共享VDDVj。
电源线VDDHi和VDDVj向像素均匀地分配VDD功率。每个电源线VDDHi和VDDVj的宽度能比图1中的小，并且每个电源线VDDHi、VDDVj的有效电阻较低。
在该实例中，每个像素部件由在第一方向上延伸的两个电源线VDDV和在与第一方向垂直的第二方向上延伸的两个电源线VDDH来限定。然而，VDDV和VDDH的数目根据像素布局和电流密度而变化。
图5示出了用于图4的RGBW像素布局的像素电路的实例。图5的像素电路50包括开关晶体管52、驱动晶体管54、存储电容器56和OLED 58。像素电路50对应于例如图4的像素部件42d(“绿色”)。
晶体管52和晶体管54是薄膜晶体管(TFT)。每个晶体管具有栅极端子以及长一端子和第二端子(例如，源极/漏极)。将开关晶体管52的栅极端子连接到选择线(地址线)62。将开关晶体管52的第一端子和第二端子连接在数据线(Vdata)60和驱动晶体管54的栅极端子之间。将驱动晶体管54的第一端子和第二端子连接到电源线VDDHn和OLED 58。将存储电容器56连接到驱动晶体管54的栅极端子和OLED 58。将电源线VDDHn连接到电源线VDDVm和VDDVm+1，将电源线VDDVm和VDDVm+1连接到电源线VDDHn+1。
图6示出了具有电源栅格和图5的像素电路的RGBW像素布局的平面图。图7示出了图6的RGBW像素的垂直截面图。图8示出了图6的RGBW像素的水平截面图。
参考图5-8，电源线VDDH和VDDV被安置在OLED区(bank)72之间的间隔之间，使得开口率没有被影响。通过在峰值亮度处施加大电流密度，使用图6的像素的面板在起偏器之后为前端屏幕提供了例如500cd/m2的亮度。在图6的面板中，使用大TFT以便减轻TFT的老化。然而，开口率高于58％。此外，VDD接触部(图4的44)与每个像素之间的电阻可以忽略不计，因为每个接触部只为每个像素运载很小的电流而电源线VDDH和VDDV为面板运载了整个电流。
已经通过举例的方式描述了一个或多个当前优选的实施例。本领域技术人员应理解，在不脱离权利要求所限定的本发明范围的情况下可以进行许多改变和修改。

Claims (12)

1.一种显示设备，包括：
形成在像素阵列区域中的多个像素，每个像素具有发光器件和多个晶体管；以及
向所述像素分配功率的电源栅格，所述电源栅格包括第一组电源线和第二组电源线，所述第一组电源线延伸穿过所述像素阵列区域，所述第二组电源线延伸穿过所述像素阵列区域并在所述像素阵列区域中与所述第一组电源线电接触，每个像素耦接到所述第一组电源线和所述第二组电源线中的至少一个电源线。
2.如权利要求1所述的显示设备，其中所述电源栅格向所述像素分配均匀的电流。
3.如权利要求1所述的显示设备，其中所述电源栅格向所述像素分配均匀的电压。
4.如权利要求1所述的显示设备，其中所述电源栅格包括：
耦接器，耦接到所述第一组电源线和所述第二组电源线。
5.如权利要求4所述的显示设备，其中所述耦接器包括：
电源环结构，布置在所述像素阵列的周边上，且耦接到所述第一组电源线和所述第二组电源线。
6.如权利要求1所述的显示设备，其中所述发光器件是有机发光二极管OLED。
7.如权利要求6所述的显示设备，其中所述第一组电源线被形成在OLED区之间。
8.如权利要求7所述的显示设备，其中所述第二组电源线被形成在OLED区之间。
9.如权利要求1所述的显示设备，其中所述第一组电源线中的电源线直接耦接到相邻的像素。
10.如权利要求1所述的显示设备，其中所述第一组电源线中的电源线被形成在两个相邻的像素之间。
11.如权利要求1所述的显示设备，其中所述像素阵列具有RGB顶部发射或底部发射结构。
12.如权利要求1所述的显示设备，其中所述像素阵列具有RGBW顶部发射或底部发射结构。
CN2008801197363A 2007-10-29 2008-10-28 用于显示设备的高开口率像素布局 Pending CN101889358A (zh)

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CA002610148A CA2610148A1 (en) 2007-10-29 2007-10-29 High aperture ratio pixel layout for amoled display
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PCT/CA2008/001914 WO2009055920A1 (en) 2007-10-29 2008-10-28 High aperture ratio pixel layout for display device

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CN106873277A (zh) * 2017-04-12 2017-06-20 武汉华星光电技术有限公司 Rgbw显示面板
CN107871765A (zh) * 2016-09-23 2018-04-03 苹果公司 具有电源网格的显示器
CN109903709A (zh) * 2016-01-21 2019-06-18 苹果公司 有机发光二极管显示器的电源和数据路由结构
US10347664B2 (en) 2017-04-12 2019-07-09 Wuhan China Star Optoelectronics Technology Co., Ltd. RGBW display panel
CN110429113A (zh) * 2012-04-25 2019-11-08 伊格尼斯创新公司 高分辨率显示器的构造
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