WO2020007066A1 - 像素界定结构、显示面板及其制造方法和显示装置 - Google Patents
像素界定结构、显示面板及其制造方法和显示装置 Download PDFInfo
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- WO2020007066A1 WO2020007066A1 PCT/CN2019/078722 CN2019078722W WO2020007066A1 WO 2020007066 A1 WO2020007066 A1 WO 2020007066A1 CN 2019078722 W CN2019078722 W CN 2019078722W WO 2020007066 A1 WO2020007066 A1 WO 2020007066A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- 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
Definitions
- the present disclosure relates to the field of display technology, and in particular, to a pixel-defining structure, a display panel, a manufacturing method thereof, and a display device.
- OLED organic light-emitting diode
- an OLED light-emitting material is formed in the opening of the pixel-defining layer.
- inkjet printing technology is generally used to form a light-emitting material layer.
- a pixel defining structure including: a pixel defining layer on a substrate, the pixel defining layer including a plurality of stacked layers, the plurality of layers including at least a first layer and a second layer Layer, the first layer is located between the substrate and the second layer; wherein the mass percentage of the lyophobic material in the second layer is higher than the mass percentage of the lyophobic material in the first layer.
- the mass percentage of the lyophobic material in each of the multiple layers gradually increases in a direction from near the substrate to far from the substrate.
- the pixel defining layer in addition to the lyophobic material, further includes at least one of polyimide and polymethyl methacrylate.
- the shape of the pixel defining layer is mesh.
- the projection of the second layer on the substrate is within the projection of the first layer on the substrate.
- the pixel defining layer has a thickness ranging from 0.5 micrometers to 5 micrometers.
- the multilayer includes 3 to 6 layers.
- the lyophobic material includes one or more of the following: a fluorine-containing polymer material, a chlorine-containing polymer material.
- a display panel including the pixel defining structure according to any one of the above embodiments.
- the display panel further includes: a substrate; and an electrode disposed on the substrate, wherein the pixel defining layer has an opening that exposes at least a portion of an upper surface of the electrode.
- a display device including the display panel according to any one of the above embodiments.
- a method for manufacturing a display panel including: providing a substrate; forming a patterned mask layer on the substrate; and an area where the mask layer is not formed on the substrate A pixel-defining layer is formed on the pixel-defining layer, and the pixel-defining layer includes a plurality of stacked layers.
- the plurality of layers includes at least a first layer and a second layer.
- the first layer is located between the substrate and the second layer.
- the mass percentage of the lyophobic material in the second layer is higher than the mass percentage of the lyophobic material in the first layer; and removing the mask layer.
- the pixel defining layer is formed by an inkjet printing process.
- forming the pixel defining layer by an inkjet printing process includes printing a first solution containing a lyophobic material on an area of the substrate where the mask layer is not formed to form the first layer. Print the second solution containing the lyophobic material on the first layer to form the second layer, wherein the mass percentage of the lyophobic material in the second solution is higher than that in the first solution The mass percentage of the liquid material.
- forming the pixel-defining layer by an inkjet printing process includes: sequentially printing a plurality of solutions of a lyophobic material from low to high masses on a region of the substrate where the mask layer is not formed, To form the multilayer, the plurality of solutions include the first solution and the second solution.
- the mass ratio of the lyophobic material to the solute material in each of the plurality of solutions is less than or equal to one.
- the method before forming the mask layer, the method further includes: forming an electrode on the substrate, the mask layer covering at least a portion of an upper surface of the electrode.
- the method further includes: printing a luminescent material in an opening of the pixel defining layer.
- the forming a patterned mask layer on the substrate includes: forming a photoresist layer on the substrate; exposing and developing the photoresist layer to Forming the mask layer.
- the multilayer includes 3 to 6 layers.
- the lyophobic material includes one or more of the following: a fluorine-containing polymer material, a chlorine-containing polymer material.
- FIG. 1 is a schematic structural diagram of a pixel defining structure according to an embodiment of the present disclosure
- FIG. 2 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure
- 3A-3C are schematic cross-sectional views of structures formed at different stages of forming a display panel according to some embodiments of the present disclosure
- FIG. 4 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
- FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
- an intermediate component may or may not exist between the specific component and the first component or the second component.
- the specific component may be directly connected to the other components without an intervening component, or may be directly connected to the other components without an intervening component.
- the inventors have studied the above problems, and found that after curing the pixel-defining layer, the upper surface of the pixel-defining layer has stronger liquid-repellent properties, but the liquid-repellent properties of the sides of the openings of the pixel-defining layer are weak. Therefore, when printing the luminescent material in the opening of the pixel defining layer, the ink easily climbs upward on the side of the opening, so that the thickness of the luminescent material formed by printing is not uniform.
- FIG. 1 is a schematic structural diagram of a pixel defining structure according to an embodiment of the present disclosure.
- the pixel defining structure includes a pixel defining layer 102 on a substrate 101.
- the thickness of the pixel defining layer 102 may be, for example, 0.5 micrometers to 5 micrometers, for example, 2 micrometers, 4 micrometers, or the like.
- An electrode 103 such as an anode, may be formed on the substrate 101. Different electrodes 103 may be spaced by the pixel defining layer 102. It should be understood that a thin film transistor (TFT) array, a capacitor, a resistor, a wiring (not shown in the figure), a planarization layer, and the like may also be formed in the substrate 101. The pixel defining layer 102 and the electrode 103 are located on a planarization layer.
- TFT thin film transistor
- the pixel defining layer 102 may have, for example, an opening 104 that exposes at least a portion of an upper surface of the electrode 103.
- FIG. 1 shows a case where the opening 104 exposes the entire upper surface of the electrode 103.
- the opening 104 may expose a part of the upper surface of the electrode 103, for example, the pixel defining layer 102 may cover a part of the upper surface of the electrode 103.
- the shape of the pixel-defining layer 102 may be a mesh, that is, the pixel-defining layer 102 has a plurality of openings 104.
- the pixel defining layer 102 includes multiple layers stacked.
- the stacked layers include at least a first layer 112 and a second layer 122, and the first layer 112 is located between the substrate 101 and the second layer 122.
- the mass percentage of the lyophobic material in the second layer 122 is higher than the mass percentage of the lyophobic material in the first layer 112.
- the projection of the second layer 122 on the substrate 101 is within the projection of the first layer 112 on the substrate 101.
- the material of the pixel defining layer 102 may include other materials besides the lyophobic material, such as at least one of polyimide (PI) and polymethyl methacrylate (PMMA).
- the stacked layers may include only the first layer 112 and the second layer 122.
- the mass percentage of the lyophobic material contained in the relatively upper second layer 122 is higher than the mass percentage of the lyophobic material contained in the relatively lower first layer 112.
- the stacked layers may include other layers in addition to the first layer 112 and the second layer 122, such as a third layer 132 between the first layer 112 and the second layer 122, etc. .
- the mass percentage of the lyophobic material in the other layers of the stacked multilayer may be higher than the mass percentage of the lyophobic material in the second layer 122 or lower than the mass percentage of the lyophobic material in the first layer 112. It may be between the mass percentage of the lyophobic material in the second layer 122 and the mass percentage of the lyophobic material in the first layer 112.
- the lyophobic material may include one or more of the following: a fluorine-containing polymer material, a chlorine-containing polymer material.
- the fluorine-containing polymer material may include, for example, polyvinylidene fluoride (PVDF).
- the chlorine-containing polymer material may include, for example, chlorinated polyethylene.
- the lyophobic material may be a material having a hydrophobic group.
- the mass percentage of the liquid-repellent material in the relatively upper second layer is higher than the mass percentage of the liquid-repellent material in the relatively lower first layer, so that when the luminescent material is subsequently printed in the opening of the pixel-defining layer, The solution is not easy to climb upward from the side of the opening, so that the uniformity of the thickness of the luminescent material can be improved.
- the mass percentage of the lyophobic material contained in each of the stacked multilayers gradually increases high.
- the mass percentage of the liquid-repellent material in the first layer 112, the third layer 132, and the second layer 122 gradually increases.
- the mass percentage of the lyophobic material from the bottom to the top of the pixel defining layer gradually increases. This makes it more difficult for the solution to climb upward from the side of the opening when the luminescent material is subsequently printed in the opening of the pixel-defining layer, thereby further improving the uniformity of the thickness of the luminescent material.
- the stacked multiple layers include 3 to 6 layers, such as 4 layers and 5 layers.
- Such a pixel-defining layer 102 makes it harder for the solution to climb upward from the side of the opening when printing a luminescent material in the opening of the pixel-defining layer 102, thereby further improving the uniformity of the thickness of the luminescent material.
- An embodiment of the present disclosure provides a display panel including the pixel defining structure 300 provided by any one of the above embodiments.
- the display panel further includes a substrate 101 shown in FIG. 1 and an electrode 103 disposed on the substrate 101.
- the pixel defining layer 102 has an opening 104 that exposes at least a portion of the upper surface of the electrode 103.
- FIG. 2 is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the present disclosure.
- 3A-3D are schematic cross-sectional views of structures formed at different stages of forming a display panel according to some embodiments of the present disclosure.
- step 202 a substrate 101 is provided, as shown in FIG. 3A.
- the electrode 103 may be formed on the substrate 101.
- the material of the electrode 103 may be indium tin oxide (ITO) or a stack including ITO.
- a patterned mask layer 301 is formed on the substrate 101, as shown in FIG. 3B.
- a mask material layer such as a photoresist layer
- the mask material layer is first coated on the substrate 101.
- the mask material layer is patterned, for example, exposed and developed to form a patterned mask layer 301.
- the mask layer 301 covers at least a part, that is, a part or the whole, of the upper surface of the electrode 103.
- FIG. 3B shows a case where the mask layer 301 covers the entire upper surface of the electrode 103.
- the thickness of the mask layer 301 may be 1 micrometer to 5 micrometers, for example, 2 micrometers to 4 micrometers, such as 3 micrometers and the like.
- a pixel defining layer 102 is formed in a region where the mask layer 301 is not formed on the substrate 101, as shown in FIG. 3C.
- the pixel-defining layer 102 includes a plurality of stacked layers, which includes at least a first layer 112 and a second layer 122, and the first layer 112 is located between the substrate 101 and the second layer 122.
- the mass percentage of the lyophobic material in the second layer 122 is higher than the mass percentage of the lyophobic material in the first layer 112.
- the lyophobic material may include one or more of the following: a fluorine-containing polymer material, a chlorine-containing polymer material.
- the pixel defining layer 102 may be formed by an inkjet printing process.
- a first solution containing a lyophobic material may be printed on an area of the substrate 101 where the mask layer 301 is not formed to form a first layer 112; Two solutions are printed on the first layer 112 to form a second layer 122 above the first layer 112.
- the mass percentage of the lyophobic material in the second solution is higher than the mass percentage of the lyophobic material in the first solution, so that the mass percentage of the lyophobic material in the formed second layer 122 is higher than the lyophobic material in the first layer 112 Mass percentage.
- various solutions of the liquid-repellent material with a mass percentage from low to high may be printed on the region of the substrate 101 where the mask layer 301 is not formed to form multiple layers of the pixel defining layer 102.
- the mass percentage of lyophobic material in each layer gradually increases from bottom to top.
- the multilayer includes a first layer 112, a third layer 132, and a second layer 122 in this order from bottom to top. It should be understood that a multilayer may include more than three layers, for example, a multilayer may include 4, 5, or 6 layers.
- the mass ratio of the lyophobic material to the solute material in each of the plurality of solutions used to form the pixel defining layer 102 is less than or equal to one.
- the viscosity of the solution may be 1 cP-1000 cP, such as 10 cP-800 cP, such as 30 Cp, 400 cP, and the like.
- step 208 the mask layer 301 is removed. After the mask layer 301 is removed, the opening 104 of the pixel defining layer 102 is defined (see FIG. 1).
- a luminescent material such as an organic luminescent material, may be printed in the opening of the pixel defining layer 102.
- FIG. 4 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
- the display panel 400 may include the pixel defining structure 300 of any one of the above embodiments. Since the mass percentage of the liquid-repellent material in the relatively upper second layer in the pixel-defining layer is higher than the mass percentage of the liquid-repellent material in the relatively lower first layer, the uniformity of the thickness of the subsequently formed light-emitting material can be improved, and Improve the display effect of the display panel.
- FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
- the display device 500 may include the display panel 400 of any one of the above embodiments.
- the display device may be, for example, any product or component having a display function, such as a mobile terminal, a television, a display, a notebook computer, a digital photo frame, a navigator, and an electronic paper.
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Description
Claims (21)
- 一种像素界定结构,包括:位于基板上的像素界定层,所述像素界定层包括叠置的多层,所述多层至少包括第一层和第二层,所述第一层位于所述基板和所述第二层之间;其中,所述第二层中疏液材料的质量百分比高于所述第一层中疏液材料的质量百分比。
- 根据权利要求1所述的像素界定结构,其中,在从靠近所述基板到远离所述基板的方向上,所述多层中每一层中疏液材料的质量百分比逐渐升高。
- 根据权利要求1所述的像素界定结构,其中,除所述疏液材料之外,所述像素界定层还包括聚酰亚胺和聚甲基丙烯酸甲酯中的至少一种。
- 根据权利要求1所述的像素界定结构,其中,所述像素界定层的形状为网状。
- 根据权利要求1所述的像素界定结构,其中,所述第二层在所述基板上的投影在所述第一层在所述基板上的投影之内。
- 根据权利要求1所述的像素界定结构,其中,所述像素界定层的厚度范围为0.5微米-5微米。
- 根据权利要求1所述的像素界定结构,其中,所述多层包括3层至6层。
- 根据权利要求1-7任意一项所述的像素界定结构,其中,所述疏液材料包括下列中的一种或多种:含氟的聚合物材料、含氯的聚合物材料。
- 一种显示面板,包括:权利要求1-8任意一项所述的像素界定结构。
- 根据权利要求9所述的显示面板,还包括:基板;和设置在所述基板上的电极,其中,所述像素界定层具有开口,所述开口使得所述电极的上表面的至少一部分露出。
- 一种显示装置,包括:权利要求9或10所述的显示面板。
- 一种显示面板的制造方法,包括:提供基板;在所述基板上形成图案化的掩模层;在所述基板未形成所述掩模层的区域上形成像素界定层,所述像素界定层包括叠置的多层,所述多层至少包括第一层和第二层,所述第一层位于所述基板和所述第二层之间,其中,所述第二层中疏液材料的质量百分比高于所述第一层中疏液材料的质量百分比;和去除所述掩模层。
- 根据权利要求12所述的方法,其中,通过喷墨打印工艺形成所述像素界定层。
- 根据权利要求13所述的方法,其中,通过喷墨打印工艺形成所述像素界定层包括:将包含疏液材料的第一溶液打印在所述基板未形成所述掩模层的区域,以形成所述第一层;将包含疏液材料的第二溶液打印在所述第一层上,以形成所述第二层,其中,所述第二溶液中疏液材料的质量百分比高于所述第一溶液中疏液材料的质量百分比。
- 根据权利要求14所述的方法,其中,通过喷墨打印工艺形成所述像素界定层包括:依次将疏液材料的质量百分比从低到高的多种溶液打印在所述基板未形成所述掩模层的区域,以形成所述多层,所述多种溶液包括所述第一溶液和所述第二溶液。
- 根据权利要求15所述的方法,其中,所述多种溶液中的每一种溶液中的疏液材料与溶质材料的质量比小于或等于1。
- 根据权利要求12所述的方法,其中,在形成所述掩模层之前,所述方法还包括:在所述基板上形成电极,所述掩模层覆盖所述电极的上表面的至少一部分。
- 根据权利要求17所述的方法,其中,在去除所述掩模层后,所述方法还包括:在所述像素界定层的开口中打印发光材料。
- 根据权利要求12所述的方法,其中,所述在所述基板上形成图案化的掩模层包括:在所述基板上形成光致抗蚀剂层;对所述光致抗蚀剂层进行曝光和显影,以形成所述掩模层。
- 根据权利要求12所述的方法,其中,所述多层包括3层至6层。
- 根据权利要求12-20任意一项所述的方法,其中,所述疏液材料包括下列中的一种或多种:含氟的聚合物材料、含氯的聚合物材料。
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CN110098352B (zh) | 2019-05-17 | 2023-01-13 | 合肥京东方卓印科技有限公司 | 界定溶液、显示基板、显示装置和制备像素界定层方法 |
CN110943183A (zh) * | 2019-11-27 | 2020-03-31 | 深圳市华星光电半导体显示技术有限公司 | 显示面板及其制作方法 |
CN113437125B (zh) * | 2021-06-24 | 2023-07-28 | 合肥京东方卓印科技有限公司 | 一种像素界定层、显示基板及显示装置 |
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US20070072322A1 (en) * | 2005-09-27 | 2007-03-29 | Hsi-Ming Chang | Methods for patterning films, fabricating organic electroluminescence display and fabricating thin film transistor array substrate |
CN104241329A (zh) * | 2014-08-22 | 2014-12-24 | 京东方科技集团股份有限公司 | 具有像素界定层的显示面板及像素界定层的制造方法 |
US20160155784A1 (en) * | 2014-12-02 | 2016-06-02 | Samsung Display Co., Ltd. | Method for fabricating display device and display device |
CN108899345A (zh) * | 2018-07-02 | 2018-11-27 | 京东方科技集团股份有限公司 | 像素界定结构及其制造方法、显示面板和显示装置 |
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US20200295101A1 (en) | 2020-09-17 |
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