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WO2014153801A1 - 有机电致发光阵列基板及其制作方法、显示装置 - Google Patents

有机电致发光阵列基板及其制作方法、显示装置 Download PDF

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Publication number
WO2014153801A1
WO2014153801A1 PCT/CN2013/074954 CN2013074954W WO2014153801A1 WO 2014153801 A1 WO2014153801 A1 WO 2014153801A1 CN 2013074954 W CN2013074954 W CN 2013074954W WO 2014153801 A1 WO2014153801 A1 WO 2014153801A1
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PCT/CN2013/074954
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English (en)
French (fr)
Inventor
陈海晶
成军
姜春生
沈武林
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京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US14/342,219 priority Critical patent/US20150249115A1/en
Priority to EP13828969.9A priority patent/EP2983207B1/en
Priority to JP2016504443A priority patent/JP2016518681A/ja
Priority to KR1020147004888A priority patent/KR101576756B1/ko
Publication of WO2014153801A1 publication Critical patent/WO2014153801A1/zh

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    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/353—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels characterised by the geometrical arrangement of the RGB subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • 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
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs

Definitions

  • Organic electroluminescent array substrate manufacturing method thereof, and display device
  • Embodiments of the present invention relate to an organic electroluminescence array substrate, a method of fabricating the same, and a display device. Background technique
  • organic electroluminescent displays are self-luminous displays with high contrast and wide viewing angles.
  • Organic electroluminescent displays have many advantages, such as: self-illumination, fast response, wide viewing angle, and can be used for flexible display, transparent display, 3D display, etc.
  • An organic electroluminescence display generally uses pixels arranged to emit red, green, and blue light to form pixels, and the pixel arrays constitute a matrix to constitute an organic electroluminescent display.
  • the organic electroluminescent device emitting red, green, and blue light has different luminous efficiencies, and the organic electroluminescent device emitting red light and emitting green light has higher luminous efficiency, and the luminous efficiency of the organic electroluminescent device emitting blue light is different. Low, and short life.
  • the current supplied to the organic electroluminescent device emitting blue light can be increased, and the brightness of the blue light is matched with the red light and the green light;
  • a large current causes a decrease in the life of the organic electroluminescent device, which in turn leads to a reduction in the lifetime of the display.
  • the prior art tends to match the brightness of the blue light with the red and green light by increasing the effective light-emitting area of the organic electroluminescent device that emits blue light.
  • the length and width of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are the same, so that the effective light-emitting area of the blue sub-pixel is increased, which means that the red sub-pixel and the green sub-pixel
  • the effective light-emitting area is smaller than the effective light-emitting area of the blue-light sub-pixel, and there is a region in the red-photo sub-pixel and the green-photo sub-pixel that does not emit light and does not belong to the opaque circuit, and the aperture ratio of the red photo sub-pixel and the green photo sub-pixel is reduced.
  • the present invention provides an organic electroluminescent array substrate, a manufacturing method thereof, and a display device, which have an improved aperture ratio of the organic electroluminescent array substrate.
  • An aspect of the present invention provides an organic electroluminescence array substrate including an active backplane and a color display layer formed on the active backplane, the color display layer including a plurality of pixel units, each pixel The unit includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, wherein an area of the red sub-pixel and the green sub-pixel is smaller than an area of the blue sub-pixel.
  • the lengths of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are the same, and the widths of the red sub-pixel and the green sub-pixel are smaller than the width of the blue sub-pixel.
  • the effective light emitting areas of the red sub-pixel and the green sub-pixel are smaller than the effective light-emitting area of the blue sub-pixel.
  • ⁇ is the area of the non-light-emitting area of the red sub-pixel
  • ⁇ 2 is the area of the non-light-emitting area of the green sub-pixel
  • ⁇ 3 is the area of the non-light-emitting area of the blue sub-pixel.
  • Another aspect of the present invention provides a display device comprising the organic electroluminescent array substrate as described above, further comprising a package substrate disposed opposite the display panel.
  • Still another aspect of the present invention provides a method of fabricating an organic electroluminescent array substrate, comprising: providing an active backplane; forming a color display layer on the active backplane, the color display layer comprising Each of the pixel units includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, wherein an area of the red sub-pixel and the green sub-pixel are smaller than an area of the blue sub-pixel.
  • the forming a color display layer on the active backplane includes: forming red sub-pixels, green sub-pixels, and blue sub-pixels having the same length and different widths on the active backplane, The width of the red sub-pixel and the green sub-pixel are both smaller than the width of the blue sub-pixel.
  • FIG. 1 is a schematic view showing the arrangement of an organic electroluminescent array substrate in a conventional display device
  • FIG. 2 is a schematic view showing the arrangement of an organic electroluminescent array substrate according to an embodiment of the present invention
  • Fig. 3 is a schematic view showing a display device of an embodiment of the present invention.
  • organic electroluminescent device 106 organic electroluminescent device
  • the problem of low aperture ratio of the element provides an organic electroluminescence array substrate, a method for fabricating the same, and a display device, which can improve the aperture ratio of the organic electroluminescence array substrate.
  • Embodiments of the present invention provide an organic electroluminescent array substrate including an active backplane and a color display layer formed on the active backplane, the color display layer including a plurality of pixel units.
  • Each of the pixel units includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel, wherein an area of the red sub-pixel and the green sub-pixel are smaller than an area of the blue sub-pixel.
  • the lengths of the red sub-pixel, the green sub-pixel, and the blue sub-pixel may be the same, and the widths of the red sub-pixel and the green sub-pixel are both smaller than the width of the blue sub-pixel.
  • the effective light-emitting area of the red sub-pixel and the green sub-pixel are smaller than the effective illumination of the blue sub-pixel for displaying the white light normally. area.
  • the area of the red sub-pixel and the green sub-pixel is appropriately reduced, and the area of the blue sub-pixel is increased, so that the red sub-pixel and the green sub-pixel do not exist.
  • the area to be utilized increases the aperture ratio of the pixel structure.
  • the embodiment of the invention further provides a display device comprising the organic electroluminescent array substrate as described above, and further comprising a package substrate disposed opposite the display panel.
  • the display device may be an electronic paper display, a mobile terminal display, a television, an electronic reader, or the like.
  • the embodiment of the invention further provides a method for fabricating the above organic electroluminescent array substrate, which comprises:
  • the color display layer comprising a plurality of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel and a blue sub-pixel, wherein the red sub-pixel and The area of the green sub-pixels is smaller than the area of the blue sub-pixels.
  • red sub-pixels having the same length and different widths may be formed on the active backplane, The green sub-pixel and the blue sub-pixel, wherein the width of the red sub-pixel and the green sub-pixel are both smaller than the width of the blue sub-pixel.
  • forming the red sub-pixel, the green sub-pixel, and the blue sub-pixel on the active backplane includes:
  • FIG. 1 is a schematic view showing the arrangement of pixels in a conventional organic electroluminescent device.
  • the organic electroluminescent array substrate includes an active backplane 100, and the active backplane is formed with a plurality of mutually parallel scan lines 101, a plurality of mutually parallel data lines 102, and a plurality of power supplies.
  • the scan line 101 and the data line 102 are perpendicular to each other and define a sub-pixel area.
  • the defined sub-pixel area has a red sub-pixel 107, a green sub-pixel 108, and a blue sub-pixel 109.
  • the three sub-pixels are red, green, and blue.
  • Each of the sub-pixels includes an organic electroluminescent device 106.
  • the red sub-pixel, the green sub-pixel, and the blue sub-pixel further comprise light-emitting devices capable of emitting red, green, and blue colors, respectively.
  • Each of the sub-pixels further includes a driving transistor, a switching transistor and a capacitor.
  • the drain of the driving transistor is electrically connected to the power line 103, and the source of the driving transistor is electrically connected to the anode 105 of the organic electroluminescent device.
  • the gate of the driving transistor is electrically connected to the drain of the switching transistor.
  • One end of the capacitor is electrically connected to the gate of the driving transistor, and the other end of the capacitor is electrically connected to the source of the driving transistor.
  • the gate of the switching transistor is electrically connected to the scan line, and the source is electrically connected to the data line.
  • the width and length of the red sub-pixel, the green sub-pixel, and the blue sub-pixel are all the same, and the areas of the opaque circuit regions 104 in the three sub-pixels are also substantially the same. Because the blue sub-pixel has lower luminous efficiency than the red sub-pixel and the green sub-pixel Luminous efficiency, in order to display white light normally, the effective light-emitting area of the blue sub-pixel is larger than the effective light-emitting area of the red sub-pixel and the green sub-pixel.
  • the sub-pixel design is limited by the blue sub-pixel having the largest effective light-emitting area, and the red sub-pixel and the green sub-pixel necessarily exist neither.
  • the area that emits light and does not belong to the opaque circuit area causes the aperture ratio of the red sub-pixel and the green sub-pixel to be low.
  • the embodiments of the present invention firstly obtain the required sub-pixels according to the matching conditions of the red, green and blue three-color light and the luminous efficiency and lifetime of the organic electroluminescent devices respectively emitting red, green and blue light.
  • the effective light-emitting area ratio of the red sub-pixel, the green sub-pixel, and the blue sub-pixel can be determined according to the following formula:
  • the luminous efficiency of the red sub-pixel is the luminous efficiency of the green sub-pixel
  • R 3 is the luminous efficiency of the blue sub-pixel.
  • the area of the red sub-pixel, the green sub-pixel, and the blue sub-pixel can be adjusted according to the ratio, and the red sub-pixel and the green photon are appropriately reduced.
  • Fig. 2 is a schematic view showing the arrangement of pixels in an organic electroluminescent device according to an embodiment of the invention.
  • the organic electroluminescent array substrate includes an active backplane 100, and the active backplane is formed with a plurality of mutually parallel scan lines 101, a plurality of parallel data lines 102, and a plurality of power supplies.
  • the scan line 101 and the data line 102 are perpendicular to each other and define a sub-pixel area.
  • the defined sub-pixel area has a red sub-pixel 107, a green sub-pixel 108, and a blue sub-pixel 109.
  • the three sub-pixels are red, green, and blue.
  • the sequentially adjacent pixels are repeatedly arranged, and the adjacent red sub-pixel 107, green sub-pixel 108, and blue sub-pixel 109 constitute one pixel unit.
  • the present invention is not limited to the arrangement of red, green and blue sub-pixels in a pixel unit.
  • Each sub-pixel contains an organic electroluminescent device 106.
  • the red sub-pixel, the green sub-pixel, and the blue sub-pixel also respectively contain light-emitting devices that can emit three colors of red, green, and blue.
  • Each of the sub-pixels further includes a driving transistor, a switching transistor and a capacitor.
  • the drain of the driving transistor is electrically connected to the power line 103, and the source of the driving transistor is electrically connected to the anode 105 of the organic electroluminescent device.
  • the gate of the driving transistor is electrically connected to the drain of the switching transistor.
  • One end of the capacitor is electrically connected to the gate of the driving transistor, and the other end of the capacitor is electrically connected to the source of the driving transistor.
  • the gate of the switching transistor is electrically connected to the scan line, and the source The pole is electrically connected to the data line.
  • the length and width of one pixel unit are both L, and the widths of the red, green, and blue sub-pixels included in one pixel unit are respectively L.
  • the effective light-emitting area of the blue sub-pixel is larger than the effective light-emitting area of the red sub-pixel and the green sub-pixel.
  • the luminous efficiency of the blue sub-pixel when the luminous efficiency of the blue sub-pixel is low, the area of the red sub-pixel and the green sub-pixel is reduced according to the ratio of the luminous efficiency, and the area of the blue sub-pixel is increased, so that the red sub-pixel and the green photon are The pixel does not have an unused area, thereby increasing the aperture ratio of the pixel structure.
  • Embodiments of the present invention provide a display device.
  • the display device has an electroluminescent array substrate 100 and a package substrate 200 disposed opposite the array substrate 100.
  • the package substrate 200 is overlaid on the surface of the array substrate 100 to isolate it from moisture and oxygen from the outside to improve the life of the display device.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种有机电致发光阵列基板及其制作方法、显示装置，该有机电致发光阵列基板包括有源背板（100）和形成在所述有源背板（100）上的彩色显示层，所述彩色显示层包含多个像素单元（107，108，109），每个像素单元（107，108，109）包括红色子像素（107）、绿色子像素（108）和蓝色子像素（109），其中，所述红色子像素（107）和绿色子像素（108）的面积均小于所述蓝色子像素（109）的面积。该有机电致发光阵列基板具有提高的有机电致发光阵列基板的开口率。

Description

有机电致发光阵列基板及其制作方法、 显示装置 技术领域
本发明的实施例涉及一种有机电致发光阵列基板及其制作方法、 显示装 置。 背景技术
与液晶显示器相比， 有机电致发光显示器是一种具有高对比度和宽视角 的自发光型显示器。 有机电致发光显示器具有^艮多优点， 如： 自发光、 响应 速度快、 宽视角、 可以用于柔性显示、 透明显示、 3D显示等。
有机电致发光显示器通常使用分别发射红光、 绿光、 蓝光的子像素排列 构成像素， 像素排列构成矩阵进而构成有机电致发光显示器。 发射红光、 绿 光、 蓝光的有机电致发光器件的发光效率不同， 发射红光和发射绿光的有机 电致发光器件的发光效率较高， 而发射蓝光的有机电致发光器件的发光效率 偏低， 而且寿命较短。 为了使显示器正常显示白光， 需要对三种有机电致发 光器件进行匹配：比如可以增大提供给发射蓝光的有机电致发光器件的电流， 使蓝光的亮度与红光、 绿光匹配； 但是增大电流会导致有机电致发光器件的 寿命减少， 进而导致显示器的寿命减少。
为了不影响显示器的寿命， 现有技术往往通过增加发射蓝光的有机电致 发光器件的有效发光面积， 使蓝光的亮度与红光、 绿光匹配。 但是现有显示 器的子像素设计中， 红光子像素、 绿光子像素、 蓝光子像素的长度和宽度均 是相同的， 这样蓝光子像素的有效发光面积增大， 意味着红光子像素、 绿光 子像素的有效发光面积要小于蓝光子像素的有效发光面积，导致红光子像素、 绿光子像素中必然存在既不发光又不属于不透明电路的区域， 降低了红光子 像素、 绿光子像素的开口率。 发明内容
本发明是实施例提供了一种有机电致发光阵列基板及其制作方法、 显示 装置， 具有提高的有机电致发光阵列基板的开口率。 本发明的一方面提供了一种有机电致发光阵列基板， 包括有源背板和形 成在所述有源背板上的彩色显示层， 所述彩色显示层包含多个像素单元， 每 个像素单元包括红色子像素、 绿色子像素和蓝色子像素， 其中， 所述红色子 像素和绿色子像素的面积均小于所述蓝色子像素的面积。
例如， 上述方案中， 所述红色子像素、 绿色子像素和蓝色子像素的长度 相同， 所述红色子像素和绿色子像素的宽度均小于所述蓝色子像素的宽度。
例如， 上述方案中， 所述红色子像素和绿色子像素的有效发光面积均小 于所述蓝色子像素的有效发光面积。
例如， 上述方案中， 所述红色子像素的有效发光面积 SR: 所述绿色子像 素的有效发光面积 SG:所述蓝色子像素的有效发光面积 SB= R2R3: RiR3: RiR2, 其中 为红色子像素的发光效率， R2为绿色子像素的发光效率， R3为蓝色 子像素的发光效率。
例如， 上述方案中， 所述红色子像素的宽度 L1 : 所述绿色子像素的宽度 L2: 所述蓝色子像素的宽度 L3= ( SR+T! ) ： ( SG+T2 ) ： ( SB+T3 ) , 其中 Ί\为红色子像素非发光区域的面积， Τ2为绿色子像素非发光区域的面积， Τ3 为蓝色子像素非发光区域的面积。
本发明的另一个方面还提供了一种显示装置， 包括如上所述的有机电致 发光阵列基板， 还包括与所述显示面板对设的封装基板。
本发明的再一个方面还提供了一种有机电致发光阵列基板的制作方法， 包括： 提供一有源背板； 在所述有源背板上形成彩色显示层， 所述彩色显示 层包含多个像素单元， 每个像素单元包括红色子像素、 绿色子像素和蓝色子 像素， 其中， 所述红色子像素和绿色子像素的面积均小于所述蓝色子像素的 面积。
例如， 上述方案中， 所述在所述有源背板上形成彩色显示层包括： 在所 述有源背板上形成长度相同、 宽度不同的红色子像素、 绿色子像素和蓝色子 像素， 其中所述红色子像素和绿色子像素的宽度均小于所述蓝色子像素的宽 度。
例如， 上述方案中， 所述在所述有源背板上形成长度相同、 宽度不同的 红色子像素、 绿色子像素和蓝色子像素包括： 在所述有源背板上形成宽度为 的红色子像素、 宽度为 的红色子像素和宽度为 的蓝色子像素， L1 : L2: L3= ( SR+T! )： ( SG+T2 )： ( SB+T3 ) , SR: SG: SB= R2R3: Rfc 其中， R为红色子像素的有效发光面积， SG为所述绿色子像素的有效发光面 积， SB为所述蓝色子像素的有效发光面积， 1\为红色子像素非发光区域的面 积， T2为绿色子像素非发光区域的面积， Τ3为蓝色子像素非发光区域的面积， 为红色子像素的发光效率， R2为绿色子像素的发光效率， R3为蓝色子像素 的发光效率。 附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图作 筒单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例， 而非对本发明的限制。
图 1为现有显示装置中有机电致发光阵列基板的排布示意图；
图 2为本发明实施例有机电致发光阵列基板的排布示意图；
图 3示出了本发明实施例的显示装置的示意图。
附图标记
101 扫描线 102数据线
103 电源线 104 不透明电路区域
105有机电致发光器件的阳极 106有机电致发光器件
107 红色子像素 108绿色子像素
109蓝色子像素 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本发 明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。 基于所描 述的本发明的实施例， 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例， 都属于本发明保护的范围。 素的开口率较低的问题， 提供一种有机电致发光阵列基板及其制作方法、 显 示装置， 能够提高有机电致发光阵列基板的开口率。 本发明实施例提供了一种有机电致发光阵列基板， 包括有源背板和形成 在所述有源背板上的彩色显示层， 所述彩色显示层包含多个像素单元。 每个 像素单元包括红色子像素、 绿色子像素和蓝色子像素， 其中， 所述红色子像 素和绿色子像素的面积均小于所述蓝色子像素的面积。
例如， 所述红色子像素、 绿色子像素和蓝色子像素的长度可以相同， 所 述红色子像素和绿色子像素的宽度均小于所述蓝色子像素的宽度。
由于蓝色子像素的发光效率要小于红色子像素、绿色子像素的发光效率， 为了正常显示白光， 所述红色子像素和绿色子像素的有效发光面积均小于所 述蓝色子像素的有效发光面积。
例如， 为了使有效发光面积与发光效率相匹配， 所述红色子像素的有效 发光面积 SR: 所述绿色子像素的有效发光面积 SG: 所述蓝色子像素的有效 发光面积 SB= R2R3: RiR3: RiR2, 这里 为红色子像素的发光效率， R2为 绿色子像素的发光效率， R3为蓝色子像素的发光效率。
在所述红色子像素、 绿色子像素和蓝色子像素的长度相同时， 所述红色 子像素的宽度 L1 : 所述绿色子像素的宽度 L2: 所述蓝色子像素的宽度 L3= ( SR+T! ) ： ( SG+T2 ) ： ( SB+T3 ) , 这里 1\为红色子像素非发光区域的面 积， τ2为绿色子像素非发光区域的面积， τ3为蓝色子像素非发光区域的面积。
本发明的实施例在蓝色子像素的发光效率偏低的情况下， 适当减少红光 子像素与绿光子像素的面积， 增加蓝色子像素的面积， 使红光子像素与绿光 子像素不存在没有利用到的区域， 从而提高了像素结构的开口率。
本发明实施例还提供了一种显示装置， 包括如上所述的有机电致发光阵 列基板， 还包括与所述显示面板对设的封装基板。 所述显示装置可以为电子 纸显示屏、 移动终端显示屏、 电视、 电子阅读器等。
本发明实施例还提供了一种上述有机电致发光阵列基板的制作方法， 包 括：
提供一有源背板；
在所述有源背板上形成彩色显示层，所述彩色显示层包含多个像素单元， 每个像素单元包括红色子像素、 绿色子像素和蓝色子像素， 其中， 所述红色 子像素和绿色子像素的面积均小于所述蓝色子像素的面积上。
例如， 可以在所述有源背板上形成长度相同、 宽度不同的红色子像素、 绿色子像素和蓝色子像素， 其中所述红色子像素和绿色子像素的宽度均小于 所述蓝色子像素的宽度。
在所述红色子像素、 绿色子像素和蓝色子像素的长度相同时， 在所述有 源背板上形成红色子像素、 绿色子像素和蓝色子像素包括：
在在所述有源背板上形成宽度为 的红色子像素、 宽度为 L2的绿色子 像素和宽度为 L3的蓝色子像素， L1 : L2: L3= ( SR+T! )： ( SG+T2 )： ( SB+T3 ) , 其中 SR: SG: SB= R2R3: 这里， SR为红色子像素的有效发光面 积， SC为所述绿色子像素的有效发光面积， SB为所述蓝色子像素的有效发光 面积， Ί\为红色子像素非发光区域的面积， Τ2为绿色子像素非发光区域的面 积， Τ3为蓝色子像素非发光区域的面积， 为红色子像素的发光效率， R2 为绿色子像素的发光效率， R3为蓝色子像素的发光效率。
下面结合附图及具体的实施例对本发明的有机电致发光阵列基板进行详 细介绍。
图 1所示为现有有机电致发光器件中像素的排布示意图。 由图 1可以看 出， 有机电致发光阵列基板包括有源背板 100, 所述有源背板上形成有多条 相互平行的扫描线 101、多条相互平行的数据线 102和多条电源线 103。扫描 线 101与数据线 102相互垂直并限定出子像素区域， 限定出的子像素区域有 红色子像素 107、 绿色子像素 108和蓝色子像素 109, 这三种子像素按照红、 绿、 蓝的顺序相邻重复排列， 相邻的红色子像素 107、 绿色子像素 108和蓝 色子像素 109构成一个像素单元。 每个子像素均包含有一个有机电致发光器 件 106, 相应地， 红色子像素、 绿色子像素、 蓝色子像素还分别含有可以发 出红、 绿、 蓝三种颜色的发光器件。 每个子像素还至少包含有一个驱动晶体 管， 一个开关晶体管和一个电容， 该驱动晶体管的漏极与电源线 103电性连 接， 驱动晶体管的源极与有机电致发光器件的阳极 105电性连接， 驱动晶体 管的栅极与该开关晶体管的漏极电性连接， 该电容的一端与该驱动晶体管的 栅极电性连接， 该电容的另一端与该驱动晶体管的源极电性连接。 该开关晶 体管的栅极与扫描线电性连接， 源极与数据线电性连接。
如图 1所示， 现有的子像素设计中， 红色子像素、 绿色子像素和蓝色子 像素的宽度、 长度均是相同的， 并且三种子像素中不透明电路区域 104的面 积也基本相同。 由于蓝色子像素的发光效率要小于红色子像素和绿色子像素 的发光效率， 为了正常显示白光， 蓝色子像素的有效发光面积要大于红色子 像素和绿色子像素的有效发光面积。 在红色子像素、 绿色子像素、 蓝色子像 素的有效发光面积不同的情况下， 子像素设计受到有效发光面积最大的蓝色 子像素的限制， 则红色子像素、 绿色子像素必然存在既不发光、 又不属于不 透明电路区域的区域， 导致红色子像素、 绿色子像素的开口率较低。
为了解决上述问题， 本发明的实施例， 首先根据红绿蓝三色光的匹配条 件以及分别发射红绿蓝三色光的有机电致发光器件的发光效率、寿命等因素， 得到各子像素所需的有效发光面积之间的比例关系。 可以根据以下公式确定 红色子像素、 绿色子像素和蓝色子像素的有效发光面积比例：
SRI SB— R2R3: R1R3: R1R2?
其中， 为红色子像素的发光效率， R2为绿色子像素的发光效率， R3 为蓝色子像素的发光效率。
在确定红色子像素、绿色子像素和蓝色子像素的有效发光面积比例之后 , 即可根据该比例调整红色子像素、 绿色子像素和蓝色子像素的面积， 适当减 少红光子像素与绿光子像素的尺寸、 增加蓝光子像素的尺寸。
图 2所示为根据发明实施例的一种有机电致发光器件中像素的排布示意 图。 由图 2可以看出， 有机电致发光阵列基板包括有源背板 100 , 所述有源 背板上形成有多条相互平行的扫描线 101、 多条相互平行的数据线 102和多 条电源线 103。 扫描线 101与数据线 102相互垂直并限定出子像素区域， 限 定出的子像素区域有红色子像素 107、绿色子像素 108和蓝色子像素 109 ,这 三种子像素按照红、 绿、 蓝的顺序相邻重复排列， 相邻的红色子像素 107、 绿色子像素 108和蓝色子像素 109构成一个像素单元。 本发明不限于像素单 元中红绿蓝子像素的排布方式。
每个子像素均包含有一个有机电致发光器件 106。 相应地， 红色子像素、 绿色子像素、 蓝色子像素还分别含有可以发出红、 绿、 蓝三种颜色的发光器 件。每个子像素还至少包含有一个驱动晶体管，一个开关晶体管和一个电容, 该驱动晶体管的漏极与电源线 103电性连接， 驱动晶体管的源极与有机电致 发光器件的阳极 105电性连接， 驱动晶体管的栅极与该开关晶体管的漏极电 性连接， 该电容的一端与该驱动晶体管的栅极电性连接， 该电容的另一端与 该驱动晶体管的源极电性连接。 该开关晶体管的栅极与扫描线电性连接， 源 极与数据线电性连接。
如图 2所示， 当红绿蓝子像素并排排列时， 一个像素单元的长和宽均为 L, 一个像素单元所包含的红色子像素、 绿色子像素、 蓝色子像素的宽度分 别为 、 L2、 L3 , 红色子像素非发光区域的面积为 T\ , 绿色子像素非发光区 域的面积为 T2, 蓝色子像素非发光区域的面积为 Τ3, 则红色子像素、 绿色子 像素、 蓝色子像素宽度的比值 L1 : L2: L3可以按如下方式确定： L1 : L2: L3= ( SR+T! ) ： ( SG+T2 ) ： ( SB+T3 ) 。
由于蓝色子像素的发光效率要小于红色子像素、绿色子像素的发光效率， 为了正常显示白光， 蓝色子像素的有效发光面积要大于红色子像素、 绿色子 像素的有效发光面积。 本发明的实施例在蓝色子像素的发光效率偏低的情况 下， 根据发光效率的比例减少红光子像素与绿光子像素的面积， 增加蓝色子 像素的面积， 使红光子像素与绿光子像素不存在没有利用到的区域， 从而提 高了像素结构的开口率。
本发明的实施例提供了一种显示装置。 如图 3所示， 该显示装置上述有 机电致发光阵列基板 100以及与该阵列基板 100对设的封装基板 200。 封装 基板 200覆盖在阵列基板 100的表面上， 将其与外界的水汽和氧的隔绝， 以 提高显示装置的使用寿命。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护范 围， 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1. 一种有机电致发光阵列基板， 包括有源背板和形成在所述有源背板上 的彩色显示层， 所述彩色显示层包含多个像素单元， 每个像素单元包括红色 子像素、 绿色子像素和蓝色子像素， 其中， 所述红色子像素和绿色子像素的 面积均小于所述蓝色子像素的面积。
2. 根据权利要求 1所述的有机电致发光阵列基板， 其中， 所述红色子像 素、 绿色子像素和蓝色子像素的长度相同， 所述红色子像素和绿色子像素的 宽度均小于所述蓝色子像素的宽度。
3. 根据权利要求 2所述的有机电致发光阵列基板， 其中， 所述红色子像 素和绿色子像素的有效发光面积均小于所述蓝色子像素的有效发光面积。
4. 根据权利要求 3所述的有机电致发光阵列基板， 其中， 所述红色子像 素的有效发光面积 SR: 所述绿色子像素的有效发光面积 SG: 所述蓝色子像 素的有效发光面积 SB= R2R3: R!R3: R!R2,其中 为红色子像素的发光效率， R2为绿色子像素的发光效率， R3为蓝色子像素的发光效率。
5. 根据权利要求 4所述的有机电致发光阵列基板， 其中， 所述红色子像 素的宽度 L1 :所述绿色子像素的宽度 L2:所述蓝色子像素的宽度 L3=( SR+T! ):
( SG+T2 )： ( SB+T3 ) , 其中 Ί\为红色子像素非发光区域的面积， Τ2为绿色 子像素非发光区域的面积， Τ3为蓝色子像素非发光区域的面积。
6. 一种显示装置， 包括如权利要求 1-5中任一项所述的有机电致发光阵 列基板， 还包括与所述阵列基板对设的封装基板。
7. 一种有机电致发光阵列基板的制作方法， 包括：
提供一有源背板；
在所述有源背板上形成彩色显示层，所述彩色显示层包含多个像素单元， 每个像素单元包括红色子像素、 绿色子像素和蓝色子像素， 其中， 所述红色 子像素和绿色子像素的面积均小于所述蓝色子像素的面积。
8. 根据权利要求 7所述的有机电致发光阵列基板的制作方法， 其中， 所 述在所述有源背板上形成彩色显示层包括：
在所述有源背板上形成长度相同、 宽度不同的红色子像素、 绿色子像素 和蓝色子像素， 其中所述红色子像素和绿色子像素的宽度均小于所述蓝色子 像素的宽度。
9. 根据权利要求 7所述的有机电致发光阵列基板的制作方法， 其中， 所 述在所述有源背板上形成长度相同、 宽度不同的红色子像素、 绿色子像素和 蓝色子像素包括：
在所述有源背板上形成宽度为 的红色子像素、 宽度为 的红色子像 素和宽度为 的蓝色子像素， : L2: L3= ( SR+T! )： ( SG+T2 )： ( SB+T3 ) , 其中, SR: SG: SB= R2R3: R1R3: R1R2;
其中， SR为红色子像素的有效发光面积， SG为所述绿色子像素的有效发 光面积， SB为所述蓝色子像素的有效发光面积， Ί\为红色子像素非发光区域 的面积， Τ2为绿色子像素非发光区域的面积， Τ3为蓝色子像素非发光区域的 面积， 为红色子像素的发光效率， R2为绿色子像素的发光效率， R3为蓝色 子像素的发光效率。
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US20150249115A1 (en) 2015-09-03
EP2983207A4 (en) 2016-12-28
KR101576756B1 (ko) 2015-12-10
EP2983207B1 (en) 2021-04-14
EP2983207A1 (en) 2016-02-10
KR20140127198A (ko) 2014-11-03

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