WO2021093481A1 - 有机发光显示基板及其制备方法、显示装置 - Google Patents

有机发光显示基板及其制备方法、显示装置 Download PDF

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WO2021093481A1
WO2021093481A1 PCT/CN2020/118948 CN2020118948W WO2021093481A1 WO 2021093481 A1 WO2021093481 A1 WO 2021093481A1 CN 2020118948 W CN2020118948 W CN 2020118948W WO 2021093481 A1 WO2021093481 A1 WO 2021093481A1
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sub
pixel
organic light
pixels
display substrate
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PCT/CN2020/118948
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English (en)
French (fr)
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李真真
皇甫鲁江
刘月
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京东方科技集团股份有限公司
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Priority to US17/289,130 priority Critical patent/US11723252B2/en
Publication of WO2021093481A1 publication Critical patent/WO2021093481A1/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
    • H10K59/353—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
    • H10K59/30—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

Definitions

  • the present disclosure relates to the field of display technology, and in particular to an organic light-emitting display substrate and a display device.
  • Organic light-emitting display devices are listed as a promising next-generation display technology due to their advantages of lightness, thinness, flexibility, low power consumption, wide color gamut, and high contrast. How to improve the display quality of organic light emitting display devices has always been the research and development focus of those skilled in the art.
  • an organic light emitting display substrate which includes a plurality of rows of sub-pixels, and each row of sub-pixels includes a first sub-pixel, a second sub-pixel, and a third sub-pixel that are repeatedly arranged, two adjacent Rows of sub-pixels are arranged alternately, in every two adjacent rows of sub-pixels:
  • the first sub-pixel in one row of sub-pixels and the adjacent second and third sub-pixels in another row of sub-pixels form a pixel unit, and the white light brightness centers of the pixel units in the same row are on the same straight line.
  • the first sub-pixel is a green sub-pixel
  • the second sub-pixel is a red sub-pixel
  • the third sub-pixel is a blue sub-pixel.
  • the line between the brightness center of the first sub-pixel, the brightness center of the second sub-pixel, and the brightness center of the third sub-pixel is in an isosceles triangle, and the brightness center of the first sub-pixel is located in an isosceles triangle.
  • the apex of the triangle, the brightness center of the second sub-pixel, and the brightness center of the third sub-pixel are respectively located at the two bottom vertices of the isosceles triangle, and the apex angle of the isosceles triangle is greater than 60°.
  • the areas of the first sub-pixel, the second sub-pixel, and the third sub-pixel are equal.
  • the orthographic projection length of the first sub-pixel in the row direction is greater than the orthographic projection length in the column direction
  • the orthographic projection length of the second sub-pixel in the row direction is equal to the orthographic projection length in the column direction
  • the third sub-pixel The length of the orthographic projection in the row direction is equal to the length of the orthographic projection in the column direction.
  • the area S G of the first sub-pixel, the area S R of the second sub-pixel, and the area S B of the third sub-pixel satisfy: S B >S R >S G.
  • the orthographic projection length of the first sub-pixel in the row direction is greater than the orthographic projection length in the column direction
  • the orthographic projection length of the second sub-pixel in the row direction is equal to the orthographic projection length in the column direction
  • the third sub-pixel The length of the orthographic projection in the row direction is smaller than the length of the orthographic projection in the column direction.
  • the shape of the sub-pixel includes a rectangle, a diamond, or a hexagon.
  • the organic light-emitting layers of the first sub-pixel, the second sub-pixel, and the third sub-pixel are respectively prepared by a mask evaporation method, and each sub-pixel has the same shape as the corresponding organic light-emitting layer and has the same geometric center.
  • the edge of each sub-pixel is located inside the edge of the corresponding organic light-emitting layer.
  • a display device including the organic light-emitting display substrate according to any one of the foregoing technical solutions.
  • FIG. 1 is a schematic diagram of the arrangement of sub-pixels of an organic light-emitting display substrate in the related art
  • 2a is a schematic diagram of the sub-pixel arrangement of an organic light-emitting display substrate according to an embodiment of the present disclosure
  • 2b is a schematic partial cross-sectional view of an organic light-emitting display substrate
  • 2c is a schematic diagram of the arrangement of sub-pixels and organic light-emitting layers of an organic light-emitting display substrate according to an embodiment of the present disclosure
  • 3a is a schematic diagram of the sub-pixel arrangement of an organic light emitting display substrate according to another embodiment of the present disclosure.
  • 3b is a schematic diagram of the arrangement of sub-pixels and organic light-emitting layers of an organic light-emitting display substrate according to another embodiment of the present disclosure
  • FIG. 4 is a front view of a display device according to an embodiment of the disclosure.
  • a specific element when it is described that a specific element is located between the first element and the second element, there may or may not be an intermediate element between the specific element and the first element or the second element.
  • FIG. 1 it is a schematic diagram of the arrangement of sub-pixels of an organic light-emitting display substrate in the related art.
  • the organic light emitting display substrate 100' includes a plurality of rows of sub-pixels, and each row of sub-pixels includes green sub-pixels 1', red sub-pixels 2'and blue sub-pixels 3'arranged in cycles, and two adjacent rows of sub-pixels are arranged staggered, In every two adjacent rows of sub-pixels, the green sub-pixel 1'in one row of sub-pixels and the adjacent red sub-pixels 2'and blue sub-pixels 3'in the other row of sub-pixels form a pixel unit 10', and, In the pixel unit 10', the brightness center of the green sub-pixel 1', the brightness center of the red sub-pixel 2', and the brightness center of the blue sub-pixel 3'are respectively located at the vertices of an equilateral triangle. This arrangement is usually called Delta arrangement.
  • a display device including the above organic light-emitting display substrate has obvious jagged edges when displaying a white pattern, and the display quality is not ideal.
  • embodiments of the present disclosure provide an organic light emitting display substrate and a display device.
  • FIG. 2a is a schematic diagram of the sub-pixel arrangement of an organic light emitting display substrate according to an embodiment of the disclosure.
  • the organic light emitting display substrate 100 of the embodiment of the present disclosure includes multiple rows of sub-pixels.
  • Each row of sub-pixels includes a first sub-pixel 1, a second sub-pixel 2 and a third sub-pixel 3 that are repeatedly arranged. Any two adjacent rows of sub-pixels in the multiple rows of sub-pixels are staggered.
  • a first sub-pixel 1 in one row of sub-pixels and two sub-pixels adjacent to the first sub-pixel 1 in another row of sub-pixels form a pixel unit 10, and the two sub-pixels include the first sub-pixel.
  • any two adjacent rows of sub-pixels in the multiple rows of sub-pixels are arranged staggered, as shown in FIG. 2a, the longitudinal center line 61 of the first sub-pixel 1 and the longitudinal center line 62 of the second sub-pixel 2 And the longitudinal center line 63 of the third sub-pixel 3 do not overlap with each other. And there is a non-overlapping part between the orthographic projection of the first sub-pixel 1 in the row direction and the orthographic projection of the second sub-pixel 2 in the row direction, and the orthographic projection of the first sub-pixel 1 in the row direction and the third sub-pixel 3 There is a non-overlapping part between the orthographic projections in the row direction.
  • the row direction here can also be understood as the extension direction of the first sub-pixel 1, the second sub-pixel 2, and the third sub-pixel 3 that are repeatedly arranged in each row of sub-pixels.
  • the longitudinal center line 61 of the first sub-pixel 1 coincides with the center vertical line 7 of the line segment (having a center O) between the center P of the second sub-pixel 2 and the center M of the third sub-pixel 3, such as Shown in Figure 2a.
  • Each sub-pixel of the organic light-emitting display substrate is an effective light-emitting part of an OLED (Organic Light-Emitting Diode) device.
  • the main structure of the OLED device may include an anode 51, an organic light-emitting layer (for example, an organic light-emitting layer 41) and a cathode 52 arranged in sequence.
  • the anode 51 of each OLED device is separated by the pixel defining layer 6.
  • the cathode 52 of each OLED device or the cathode 52 of some OLED devices is connected as a whole to have an equal potential.
  • the portion of the organic light-emitting layer in the electric field emits visible light.
  • the organic light-emitting layers corresponding to the first sub-pixel 1, the second sub-pixel 2 and the third sub-pixel 3 can emit light of different colors.
  • the light-emitting colors of the first sub-pixel 1, the second sub-pixel 2 and the third sub-pixel 3 may be different from each other, and the respective light-emitting colors may not be limited to a specific light-emitting color.
  • the first sub-pixel 1 can be a green sub-pixel
  • the second sub-pixel 2 can be a red sub-pixel
  • the third sub-pixel 3 can be a blue sub-pixel.
  • the green sub-pixel, the red sub-pixel, and the blue sub-pixel repeat in the row direction. arrangement.
  • the first sub-pixel may be a green sub-pixel
  • the second sub-pixel may be a blue sub-pixel
  • the third sub-pixel may be a red sub-pixel. Repeated row direction.
  • the sub-pixels of the pixel unit 10 mix light according to a certain brightness ratio, so that the pixel unit 10 can display various colors visible to the human eye.
  • the pixel unit 10 can present white light macroscopically.
  • its geometric center is the brightness center.
  • the position of the maximum white light brightness (shown at the circle S in the figure) is the white light brightness center.
  • the white light brightness center may be located on the line connecting the red light sub-pixel brightness center and the green light sub-pixel brightness center of the pixel unit 10.
  • the line connecting the brightness center of the green photo sub-pixel 1', the brightness center of the red photo sub-pixel 2'and the brightness center of the blue sub-pixel 3' is an equilateral triangle
  • the green photo sub-pixel 1' The brightness center of the red sub-pixel 2', the brightness center of the blue sub-pixel 3'are located at the three vertices of the equilateral triangle, the area of the green sub-pixel 1', the red sub-pixel 2'and the blue sub-pixel 3'
  • the white light brightness center is roughly located at one third of the line connecting the brightness center of the green photo sub-pixel 1'and the red photo sub-pixel 2', and is closer to the brightness center of the green photo sub-pixel 1'.
  • the connection is in the shape of a zigzag line, so as to include the
  • the display device of the organic light-emitting display substrate 100' displays a white pattern
  • the edge of the pattern has a jagged edge, and the display quality is not ideal.
  • each sub-pixel in the pixel unit 10 can be designed so that the white light brightness center of each pixel unit 10 in the same row is located on the same straight line. Therefore, the jaggedness of the pattern edge when the display device displays a white pattern is effectively reduced, and the display quality of the display device is improved.
  • each pixel unit 10 in the same row is located on the same straight line, which is allowed to fluctuate within a reasonable error range, and should not be absolutely understood.
  • the first sub-pixel 1 may be a green sub-pixel
  • the second sub-pixel 2 may be a red sub-pixel
  • the third sub-pixel 3 may be a blue sub-pixel.
  • the line between the brightness center of the first sub-pixel 1, the brightness center of the second sub-pixel 2 and the brightness center of the third sub-pixel 3 is an isosceles triangle, and the brightness center of the first sub-pixel 1 is located at the center of the isosceles triangle.
  • the vertex of the vertex, the brightness center of the second sub-pixel 2 and the brightness center of the third sub-pixel 3 are respectively located at the two base vertices of the isosceles triangle, and the vertex of the isosceles triangle is greater than 60°.
  • the white light luminance center of the pixel unit 10 is approximately located at the midpoint of the line connecting the luminance center of the first sub-pixel 1 and the luminance center of the second sub-pixel 2.
  • the distance between the brightness center of the green photo sub-pixel and the brightness center of the red photo sub-pixel in this embodiment is shortened, so that the white light brightness center of each pixel unit in the same row is located on the same straight line (the double-dotted line in the figure) (Shown), each white light brightness center is uniformly distributed in the row direction and the column direction, which can effectively reduce the jaggedness of the pattern edge when the display device displays a white pattern.
  • the areas of the first sub-pixel 1, the second sub-pixel 2 and the third sub-pixel 3 may be equal, that is, the ratio of the aperture ratio is 1:1:1.
  • the specific shape of the sub-pixel is not limited, for example, it may be a rectangle, a diamond, or a hexagon as shown in the figure, and so on.
  • the orthographic projection length of the first sub-pixel 1 in the row direction can be greater than the orthographic projection length in the column direction (for example, the slightly wide and flat hexagon shown in the figure),
  • the orthographic projection length of the second sub-pixel 2 in the row direction can be equal to the orthographic projection length in the column direction (for example, the regular hexagon shown in the figure), and the orthographic projection length of the third sub-pixel 3 in the row direction can be equal to the column direction.
  • the length of the orthographic projection (for example, the regular hexagon shown in the figure).
  • the blue sub-pixel has the lowest lifespan
  • the red sub-pixel has a slightly shorter lifespan than the green sub-pixel.
  • the area of the blue sub-pixel can be designed to be the largest among the three, and the green sub-pixel can be equivalent to the area of the red sub-pixel, or slightly smaller than the area of the red sub-pixel. small. In this way, the current density of the blue sub-pixels can be reduced, and the decay speed thereof can be reduced, so that the lifespan of the blue sub-pixels, the red sub-pixels and the green sub-pixels can be matched.
  • FIG. 3a is a schematic diagram of the sub-pixel arrangement of an organic light emitting display substrate according to another embodiment of the present disclosure.
  • the first sub-pixel 1 may be a green sub-pixel
  • the second sub-pixel 2 may be a red sub-pixel
  • the third sub-pixel 3 may be a blue sub-pixel.
  • a sub-pixel area S G 1 the second sub-pixel area S R 2 and the third sub-pixel area S B 3 satisfy: S B> S R> S G.
  • the distance D1 between the longitudinal centerline 61 of the first subpixel 1 and the longitudinal centerline 62 of the second subpixel 2 is different from the longitudinal centerline 61 of the first subpixel 1 and the third subpixel.
  • the distance D2 between the longitudinal centerlines 63 of the pixels 3. is greater than the longitudinal centerline 61 of the first subpixel 1 and the third subpixel.
  • the specific size design of the pixel unit 10 can be, for example, that the orthographic projection length of the first sub-pixel 1 in the row direction is greater than the orthographic projection length in the column direction (such as slightly wider as shown in the figure).
  • Flat hexagon the orthographic projection length of the second sub-pixel 2 in the row direction is equal to the orthographic projection length in the column direction (for example, the regular hexagon shown in the figure), and the orthographic projection of the third sub-pixel 3 in the row direction
  • the length is smaller than the orthographic projection length in the column direction (for example, the slightly narrow and long hexagon shown in the figure).
  • the white light luminance center of the pixel unit 10 is approximately located at the midpoint of the line connecting the luminance center of the first sub-pixel 1 and the luminance center of the second sub-pixel 2.
  • the distance between the brightness center of the green sub-pixel and the brightness center of the red sub-pixel in this embodiment is shortened, so that the white light brightness center of each pixel unit in the same row is located on the same straight line, thereby effectively reducing the display device’s white display.
  • the jaggedness of the edge of the pattern during the pattern on the other hand, it also takes into account the life matching of the blue sub-pixels, the red sub-pixels and the green sub-pixels, thereby prolonging the service life of the organic light-emitting display substrate.
  • the organic light-emitting layers of the first sub-pixel 1, the second sub-pixel 2 and the third sub-pixel 3 may be respectively prepared by a mask evaporation method.
  • the organic light-emitting layers 41, 42, 43 of the organic light-emitting display substrate 100 are manufactured, the organic light-emitting layer 41 corresponding to each first sub-pixel 1 is formed through the first vapor deposition process. Then, the organic light-emitting layer 42 corresponding to each second sub-pixel 2 is formed through the second evaporation process, and then the organic light-emitting layer 43 corresponding to each third sub-pixel 3 is formed through the third evaporation process.
  • Each plating process requires the use of a mask.
  • Each organic light-emitting layer has the same shape as the corresponding sub-pixel and coincides with the geometric center, but the size of the organic light-emitting layer and the corresponding sub-pixel may be different, and the edge of the organic light-emitting layer may be located outside the edge of the corresponding sub-pixel.
  • the pixel design solution of the above-mentioned embodiment of the present disclosure only makes some adjustments in the size and shape design of the sub-pixels, and does not increase the difficulty of masking the screen. Moreover, no additional process is added to the production of the organic light-emitting display substrate. Therefore, the above-mentioned embodiments of the present disclosure will not increase the manufacturing cost.
  • an embodiment of the present disclosure also provides a display device, including the organic light emitting display substrate 100 of any of the foregoing embodiments.
  • a display device including the organic light emitting display substrate 100 of any of the foregoing embodiments.
  • the product type of the display device is not limited, and it can be a flat-panel display device or a flexible display device.
  • the specific product can be a monitor, electronic paper, tablet computer, television, smart display label, smart display card, and so on.

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Abstract

提供一种有机发光显示基板及其制备方法、显示装置。有机发光显示基板（100）包括多行子像素，每行子像素包括重复排列的第一子像素（1）、第二子像素（2）和第三子像素（3），相邻两行子像素相错设置，每相邻两行子像素中：其中一行子像素中的第一子像素（1）与另一行子像素中与其相邻的第二子像素（2）和第三子像素（3）组成一个像素单元（10），位于同一行的各个像素单元（10）的白光亮度中心（S）位于同一直线上。

Description

[根据细则37.2由ISA制定的发明名称]　有机发光显示基板及其制备方法、显示装置
相关申请的交叉引用
本申请是以CN申请号为201911104421.8，申请日为2019年11月13日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及显示技术领域，特别涉及一种有机发光显示基板及显示装置。
背景技术
有机发光显示装置由于其轻薄、可弯曲、功耗低、色域广、对比度高等优点，被列为极具发展前景的下一代显示技术。如何提升有机发光显示装置的显示品质，一直是本领域技术人员的研发重点。
上述内容仅用于辅助理解本公开的技术方案，并不代表承认上述内容是现有技术。
发明内容
根据本公开实施例的一个方面，提供了一种有机发光显示基板，包括多行子像素，每行子像素包括重复排列的第一子像素、第二子像素和第三子像素，相邻两行子像素相错设置，每相邻两行子像素中：
其中一行子像素中的第一子像素与另一行子像素中与其相邻的第二子像素和第三子像素组成一个像素单元，位于同一行的各个像素单元的白光亮度中心位于同一直线上。
在一些实施例中，第一子像素为绿光子像素，第二子像素为红光子像素，第三子像素为蓝光子像素。
在一些实施例中，第一子像素的亮度中心、第二子像素的亮度中心和第三子像素的亮度中心之间的连线呈等腰三角形，且第一子像素的亮度中心位于等腰三角形的顶角顶点、第二子像素的亮度中心和第三子像素的亮度中心分别位于等腰三角形的两个底角顶点，等腰三角形的顶角大于60°。
在一些实施例中，第一子像素、第二子像素和第三子像素的面积相等。
在一些实施例中，第一子像素在行向上的正投影长度大于在列向上的正投影长度， 第二子像素在行向上的正投影长度等于在列向上的正投影长度，第三子像素在行向上的正投影长度等于在列向上的正投影长度。
在一些实施例中，第一子像素的面积S G、第二子像素的面积S R和第三子像素的面积S B满足：S B>S R>S G。
在一些实施例中，第一子像素在行向上的正投影长度大于在列向上的正投影长度，第二子像素在行向上的正投影长度等于在列向上的正投影长度，第三子像素在行向上的正投影长度小于在列向上的正投影长度。
在一些实施例中，子像素的形状包括矩形、菱形或六边形。
在一些实施例中，第一子像素、第二子像素和第三子像素的有机发光层分别通过掩模板蒸镀法制备，每个子像素与对应的有机发光层形状相同且几何中心重合，每个子像素的边缘位于对应的有机发光层的边缘内侧。
根据本公开实施例的另一个方面，提供了一种显示装置，包括前述任一技术方案所述的有机发光显示基板。
通过以下参照附图对本公开的实施例的详细描述，本公开的其它特征及其优点将会变得清楚。
附图说明
构成说明书的一部分的附图描述了本公开的实施例，并且连同说明书一起用于解释本公开的原理。
参照附图，根据下面的详细描述，可以更加清楚地理解本公开，其中：
图1为相关技术中的一种有机发光显示基板的子像素排布示意图；
图2a为本公开一实施例有机发光显示基板的子像素排布示意图；
图2b为有机发光显示基板的部分截面示意图；
图2c为本公开一实施例有机发光显示基板的子像素与有机发光层排布示意图；
图3a为本公开另一实施例有机发光显示基板的子像素排布示意图；
图3b为本公开另一实施例有机发光显示基板的子像素与有机发光层排布示意图；
图4为本公开一实施例显示装置的主视图。
应当明白，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。此外，相同或类似的参考标号表示相同或类似的构件。
具体实施方式
现在将参照附图来详细描述本公开的各种实施例。对实施例的描述仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。本公开可以以许多不同的形式实现，不限于这里所述的实施例。提供这些实施例是为了使本公开透彻且完整，并且向本领域技术人员充分表达本公开的范围。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置应被解释为仅仅是示意性的，而不是作为限制。
本公开中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的部分。“包括”等类似的词语意指在该词前的要素涵盖在该词后列举的要素，并不排除也涵盖其他要素的可能。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
在本公开中，当描述到特定元件位于第一元件和第二元件之间时，在该特定元件与第一元件或第二元件之间可以存在居间元件，也可以不存在居间元件。
本公开使用的所有术语(包括技术术语或者科学术语)与本公开所属领域的普通技术人员理解的含义相同，除非另外特别定义。还应当理解，在诸如通用字典中定义的术语应当被解释为具有与它们在相关技术的上下文中的含义相一致的含义，而不应用理想化或极度形式化的意义来解释，除非这里明确地这样定义。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
如图1所示，为相关技术中的一种有机发光显示基板的子像素排布示意图。该有机发光显示基板100’，包括多行子像素，每行子像素包括循环排列的绿光子像素1’、红光子像素2’和蓝光子像素3’，相邻两行子像素相错设置，每相邻两行子像素中，其中一行子像素中的绿光子像素1’与另一行子像素中与其相邻的红光子像素2’和蓝光子像素3’组成一个像素单元10’，并且，该像素单元10’中，绿光子像素1’的亮度中心、红光子像素2’的亮度中心和蓝光子像素3’的亮度中心分别位于等边三角形的顶点。这种排布方式通常称为Delta排布方式。
本申请的发明人在实现本公开实施例的过程中发现，包含上述有机发光显示基板的显示装置，其在显示白色图案时，图案边缘锯齿感明显，显示品质不够理想。
为解决上述技术问题，本公开实施例提供了一种有机发光显示基板及显示装置。
图2a为本公开一实施例有机发光显示基板的子像素排布示意图。
如图2a所示，本公开实施例的有机发光显示基板100包括多行子像素。每行子像素包括重复排列的第一子像素1、第二子像素2和第三子像素3。多行子像素中任意相邻的两行子像素相错设置。每相邻两行子像素中：其中一行子像素中的第一子像素1与另一行子像素中与该第一子像素1相邻的两个子像素组成一个像素单元10，两个子像素包括第二子像素2和第三子像素3，如图中双点划线所示，位于同一行的各个像素单元10的白光亮度中心(如图中圆圈S处所示)位于同一直线上。
在一些实施例中，多行子像素中任意相邻的两行子像素相错设置，如图2a所示，第一子像素1的纵向中心线61、第二子像素2的纵向中心线62和第三子像素3的纵向中心线63之间互不重合。且第一子像素1在行向上的正投影和第二子像素2在行向上的正投影之间存在不重叠的部分，以及第一子像素1在行向上的正投影和第三子像素3在行向上的正投影之间存在不重叠的部分。这里的行向也可以理解为每行子像素中重复排列的第一子像素1、第二子像素2和第三子像素3的延伸方向。
在一些实施例中，第一子像素1的纵向中心线61与第二子像素2的中心P和第三子像素3的中心M之间线段(具有中心O)的中心垂线7重合，如图2a所示。
有机发光显示基板的每个子像素即为一个OLED(Organic Light-Emitting Diode,有机发光二极管)器件的有效发光部分。如图2b所示，OLED器件的主要结构可以包括依次设置的阳极51、有机发光层(例如有机发光层41)和阴极52。各OLED器件的阳极51通过像素界定层6间隔开。各OLED器件的阴极52或一些OLED器件的阴极52连接为一体而具有等电势。当阳极51和阴极52之间建立电场时，有机发光层位于电场中的部分便发出可见光。第一子像素1、第二子像素2和第三子像素3所对应有机发光层可以发出不同颜色的光。
在本公开实施例中，第一子像素1、第二子像素2和第三子像素3的发光颜色可以互不相同，且各自发光颜色可以不限定为具体一种发光颜色。例如，第一子像素1可以为绿光子像素，第二子像素2可以为红光子像素，第三子像素3可以为蓝光子像素，绿光子像素、红光子像素和蓝光子像素沿行向重复排列。或者，在一些实施例中，第一子像素可以为绿光子像素，第二子像素可以为蓝光子像素，第三子像素可以为红光子像素，绿光子像素、蓝光子像素和红光子像素沿行向重复排列。
像素单元10的各个子像素按照一定亮度比例混光，可以使像素单元10显示出人 眼可见的各种彩色。例如，当像素单元10的红光子像素、绿光子像素和蓝光子像素按照65％：30％：5％的亮度比例混光时，像素单元10宏观上可以呈现白光。对于子像素而言，其几何中心即为亮度中心。对于像素单元10而言，白光亮度最大的位置(如图中圆圈S处所示)为白光亮度中心。例如，白光亮度中心可以位于像素单元10的红光子像素亮度中心与绿光子像素亮度中心的连线上。
在相关技术中，如图1所示，绿光子像素1’的亮度中心、红光子像素2’的亮度中心和蓝光子像素3’的亮度中心的连线呈等边三角形，绿光子像素1’的亮度中心、红光子像素2’的亮度中心和蓝光子像素3’的亮度中心分别位于等边三角形的三个顶点，绿光子像素1’、红光子像素2’和蓝光子像素3’的面积相等，白光亮度中心大致位于绿光子像素1’的亮度中心与红光子像素2’的亮度中心的连线的三分之一处，并且更加靠近绿光子像素1’的亮度中心。如图中的双点划线所示，若将每行像素单元10’的白光亮度中心(如图中圆圈S’处所示)连线，则该连线呈波折线状，从而使得包含该有机发光显示基板100’的显示装置在显示白色图案时，图案边缘锯齿感明显，显示品质不够理想。
在本公开的上述实施例中，如图2a所示，可以通过对像素单元10中各子像素的形状和/或尺寸的设计，使同一行中各个像素单元10的白光亮度中心位于同一直线上，从而有效减轻了显示装置在显示白色图案时图案边缘的锯齿感，提升了显示装置的显示品质。
值得一提的是，同一行的各个像素单元10的白光亮度中心位于同一直线上，是允许在一个合理的误差范围内波动的，不应做绝对理解。
如图2a所示，在本公开的一个实施例中，第一子像素1可以为绿光子像素，第二子像素2可以为红光子像素，第三子像素3可以为蓝光子像素。第一子像素1的亮度中心、第二子像素2的亮度中心和第三子像素3的亮度中心之间的连线呈等腰三角形，且第一子像素1的亮度中心位于等腰三角形的顶角顶点、第二子像素2的亮度中心和第三子像素3的亮度中心分别位于等腰三角形的两个底角顶点，该等腰三角形的顶角大于60°。像素单元10的白光亮度中心大致位于第一子像素1的亮度中心与第二子像素2的亮度中心的连线的中点上。
与相关技术相比，该实施例中绿光子像素亮度中心与红光子像素亮度中心的距离缩短，从而使得同一行的各个像素单元的白光亮度中心位于同一直线上(如图中的双点划线所示)，各白光亮度中心在行向和列向上均匀分布，可以有效减轻显示装置在 显示白色图案时图案边缘的锯齿感。
在该实施例中，第一子像素1、第二子像素2和第三子像素3的面积可以相等，即开口率比例为1：1：1。其中，子像素具体形状不限，例如可以呈矩形、菱形或如图中所示的六边形，等等。
在具体的尺寸设计上，如图2a所示，第一子像素1在行向上的正投影长度可以大于在列向上的正投影长度(例如图中所示的略微宽扁的六边形)，第二子像素2在行向上的正投影长度可以等于在列向上的正投影长度(例如图中所示的正六边形)，第三子像素3在行向上的正投影长度可以等于在列向上的正投影长度(例如图中所示的正六边形)。
在面积相同的情况下，蓝光子像素的寿命最低，红光子像素比绿光子像素的寿命略短。本公开的一些实施例中，在一个像素单元中，可以将蓝光子像素的面积设计为三者之中最大，而绿光子像素可以与红光子像素的面积相当，或者比红光子像素的面积略小。这样，可以降低蓝光子像素的电流密度，减小其衰退速度，从而使蓝光子像素与红光子像素和绿光子像素的寿命相匹配。
图3a为本公开另一实施例有机发光显示基板的子像素排布示意图。
如图3a所示，在本公开的另一个实施例中，第一子像素1可以为绿光子像素，第二子像素2可以为红光子像素，第三子像素3可以为蓝光子像素，第一子像素1的面积S G、第二子像素2的面积S R和第三子像素3的面积S B可以满足：S B>S R>S G。
在一些实施例中，第一子像素1的纵向中心线61和第二子像素2的纵向中心线62之间的距离D1不同于第一子像素1的纵向中心线61和所述第三子像素3的纵向中心线63之间的距离D2。例如，如图3a所示，第一子像素1的纵向中心线61和第二子像素2的纵向中心线62之间的距离D1大于第一子像素1的纵向中心线61和第三子像素3的纵向中心线63之间的距离D2。
在满足上述面积条件的前提下，像素单元10在具体尺寸设计上例如可以为：第一子像素1在行向上的正投影长度大于在列向上的正投影长度(例如图中所示的略微宽扁的六边形)，第二子像素2在行向上的正投影长度等于在列向上的正投影长度(例如图中所示的正六边形)，第三子像素3在行向上的正投影长度小于在列向上的正投影长度(例如图中所示的略微窄长的六边形)。像素单元10的白光亮度中心大致位于第一子像素1的亮度中心与第二子像素2的亮度中心的连线的中点上。
与相关技术相比，该实施例一方面绿光子像素亮度中心与红光子像素亮度中心的 距离缩短，使得同一行的各个像素单元的白光亮度中心位于同一直线上，从而有效减轻显示装置在显示白色图案时图案边缘的锯齿感；另一方面，还兼顾了蓝光子像素与红光子像素和绿光子像素的寿命匹配，从而延长了有机发光显示基板的使用寿命。
在本公开上述的实施例中，第一子像素1、第二子像素2和第三子像素3的有机发光层可以分别通过掩模板蒸镀法制备。如图2c和图3b所示，有机发光显示基板100的有机发光层41、42、43在制作时，首先通过第一次蒸镀工艺，形成各个第一子像素1所对应的有机发光层41，然后通过第二次蒸镀工艺形成各个第二子像素2所对应的有机发光层42，之后再通过第三次蒸镀工艺形成各个第三子像素3所对应的有机发光层43，三次蒸镀工艺分别需要使用一张掩模板。每个有机发光层与所对应子像素的形状相同并且几何中心重合，但有机发光层与所对应子像素的大小可以不同，有机发光层的边缘可以位于所对应子像素的边缘的外侧。
与相关技术相比，本公开上述实施例的像素设计方案仅是在子像素的尺寸和形状设计上做了一些调整，并没有增加掩模板的张网难度。且有机发光显示基板的制作也没有增加额外的工艺。因此，本公开上述实施例不会增加制作的成本。
如图4所示，本公开实施例还提供一种显示装置，包括前述任一实施例的有机发光显示基板100。与相关技术相比，显示装置在显示白色图案时图案边缘的锯齿感得到有效改善，因此，显示品质显著提升。显示装置的产品类型不限，可以为平板显示装置，也可以为柔性显示装置，具体产品可以为显示器、电子纸、平板电脑、电视机、智能显示标签、智能显示卡，等等。
虽然已经通过示例对本公开的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本公开的范围。本领域的技术人员应该理解，可在不脱离本公开的范围和精神的情况下，对以上实施例进行修改。本公开的范围由所附权利要求来限定。

Claims (19)

  1. 一种有机发光显示基板，包括多行子像素，每行子像素包括重复排列的第一子像素、第二子像素和第三子像素，相邻两行子像素相错设置，每相邻两行子像素中：
    一行子像素中的第一子像素以及另一行子像素中与该第一子像素相邻的两个子像素组成一个像素单元，所述两个子像素包括第二子像素和第三子像素，位于同一行的各个像素单元的白光亮度中心位于同一直线上。
  2. 根据权利要求1所述的有机发光显示基板，其中：所述第一子像素的纵向中心线、所述第二子像素的纵向中心线和所述第三子像素的纵向中心线之间互不重合，且所述第一子像素在行向上的正投影和所述第二子像素在行向上的正投影之间存在不重叠的部分，以及所述第一子像素在行向上的正投影和所述第三子像素在行向上的正投影之间存在不重叠的部分。
  3. 根据权利要求2所述的有机发光显示基板，其中：所述第一子像素的纵向中心线与所述第二子像素的中心和所述第三子像素的中心之间线段的中心垂线重合。
  4. 根据权利要求1所述的有机发光显示基板，其中：第一子像素为绿光子像素，第二子像素为红光子像素，第三子像素为蓝光子像素。
  5. 根据权利要求1所述的有机发光显示基板，其中：第一子像素为绿光子像素，第二子像素为蓝光子像素，第三子像素为红光子像素。
  6. 根据权利要求4所述的有机发光显示基板，其中：所述第一子像素、所述第二子像素和所述第三子像素按照30％：65％：5％的亮度比例混光时，像素单元宏观上呈现白光。
  7. 根据权利要求4或5所述的有机发光显示基板，其中：
    第一子像素的亮度中心、第二子像素的亮度中心和第三子像素的亮度中心之间的连线呈等腰三角形，且第一子像素的亮度中心位于等腰三角形的顶角顶点、第二子像 素的亮度中心和第三子像素的亮度中心分别位于等腰三角形的两个底角顶点，等腰三角形的顶角大于60°。
  8. 根据权利要求4所述的有机发光显示基板，其中：
    所述像素单元的白光亮度中心位于第一子像素的亮度中心与第二子像素的亮度中心的连线的中点上。
  9. 根据权利要求1所述的有机发光显示基板，其中：第一子像素、第二子像素和第三子像素的面积相等。
  10. 根据权利要求9所述的有机发光显示基板，其中：第一子像素在行向上的正投影长度大于在列向上的正投影长度，第二子像素在行向上的正投影长度等于在列向上的正投影长度，第三子像素在行向上的正投影长度等于在列向上的正投影长度。
  11. 根据权利要求1所述的有机发光显示基板，其中：第一子像素的面积S G、第二子像素的面积S R和第三子像素的面积S B满足：S B>S R>S G。
  12. 根据权利要求11所述的有机发光显示基板，其中：所述第一子像素的纵向中心线和所述第二子像素的纵向中心线之间的距离不同于所述第一子像素的纵向中心线和所述第三子像素的纵向中心线之间的距离。
  13. 根据权利要求11所述的有机发光显示基板，其中：第一子像素在行向上的正投影长度大于在列向上的正投影长度，第二子像素在行向上的正投影长度等于在列向上的正投影长度，第三子像素在行向上的正投影长度小于在列向上的正投影长度。
  14. 根据权利要求1所述的有机发光显示基板，其中：子像素的形状包括矩形、菱形或六边形。
  15. 根据权利要求1-14任一项所述的有机发光显示基板，其中：第一子像素、第二子像素和第三子像素均包括有机发光层，每个子像素与对应的有机发光层形状相同 且几何中心重合，每个子像素的边缘位于对应的有机发光层的边缘内侧。
  16. 一种有机发光显示基板的制备方法，包括：
    形成多行子像素，每行子像素包括重复排列的第一子像素、第二子像素和第三子像素，相邻两行子像素相错设置，每相邻两行子像素中：
    一行子像素中的第一子像素以及另一行子像素中与该第一子像素相邻的两个子像素组成一个像素单元，所述两个子像素包括第二子像素和第三子像素，位于同一行的各个像素单元的白光亮度中心位于同一直线上。
  17. 根据权利要求16所述的有机发光显示基板的制备方法，其中，第一子像素、第二子像素和第三子像素均包括有机发光层，形成多行子像素包括：
    采用掩模板蒸镀法来制备第一子像素、第二子像素和第三子像素的有机发光层。
  18. 根据权利要求17所述的有机发光显示基板的制备方法，其中，采用掩模板蒸镀法来制备第一子像素、第二子像素和第三子像素的有机发光层包括：
    利用第一次蒸镀工艺来形成与第一子像素对应的有机发光层，利用第二次蒸镀工艺来形成与第二子像素对应的有机发光层，利用第三次蒸镀工艺来形成与第三子像素对应的有机发光层，第一次蒸镀工艺、第二次蒸镀工艺和第三次蒸镀工艺分别使用一张掩模板。
  19. 一种显示装置，包括：根据权利要求1-15任一项所述的有机发光显示基板。
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