CN109037481B - Organic light-emitting display cover plate and manufacturing method, display panel and display device - Google Patents
Organic light-emitting display cover plate and manufacturing method, display panel and display deviceDownload PDFInfo
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- CN109037481B CN109037481BCN201810865023.7ACN201810865023ACN109037481BCN 109037481 BCN109037481 BCN 109037481BCN 201810865023 ACN201810865023 ACN 201810865023ACN 109037481 BCN109037481 BCN 109037481B
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- 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
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Abstract
Description
Translated fromChinese技术领域technical field
本发明涉及显示技术领域，具体地，涉及有机发光显示盖板及制作方法、显示面板和显示装置。The present invention relates to the field of display technology, and in particular, to an organic light-emitting display cover plate and a manufacturing method, a display panel and a display device.
背景技术Background technique
有机电致发光(OLED)显示技术因其自发光、广视角、对比度高、较低耗电、极高反应速度、重量超轻薄、柔软显示、屏幕可卷曲、温度适应性强、制作工艺简单等优点，已成为了光电显示技术领域的研究热点。顶发射AMOLED(被动式有机电致发光二极管)可有效解决由于复杂TFT(薄膜场效应管)补偿电路所带来的开口率降低及显示屏亮度降低的问题，同时通过利用顶发射AMOLED器件结构中存在的微腔效应，还可以对AMOLED显示屏的色域进行改善，提高显示效果。作为顶发射AMOLED必须投射部分，透明阴极的透光率和导电度是至关重要的因素。常用的阴极材料如铝、镁-铝、银都只有在很薄时才能有较好的透光度，但阴极层过薄会导致断路或金属氧化，不能形成有效地欧姆接触，致使显示屏亮度不均；而采用透明度较高的氧化铟锡、氧化铟锌等材料制作阴极时，阴极的电阻较大，导电度较低，因此，只能通过设置辅助阴极的方式增加电导率。Organic electroluminescence (OLED) display technology is characterized by its self-luminescence, wide viewing angle, high contrast ratio, low power consumption, extremely high response speed, ultra-thin weight, soft display, rollable screen, strong temperature adaptability, and simple production process. It has become a research hotspot in the field of optoelectronic display technology. Top emission AMOLED (passive organic electroluminescent diode) can effectively solve the problems of the reduction of aperture ratio and the brightness of the display screen caused by the complex TFT (thin film field effect transistor) compensation circuit. The micro-cavity effect can also improve the color gamut of the AMOLED display and improve the display effect. As a top-emission AMOLED must project part, the transmittance and conductivity of the transparent cathode are crucial factors. Commonly used cathode materials such as aluminum, magnesium-aluminum, and silver can only have good transmittance when they are very thin. However, if the cathode layer is too thin, it will lead to open circuit or metal oxidation, and cannot form an effective ohmic contact, resulting in the brightness of the display screen. When the cathode is made of indium tin oxide, indium zinc oxide and other materials with higher transparency, the resistance of the cathode is higher and the conductivity is lower. Therefore, the conductivity can only be increased by setting an auxiliary cathode.
然而，目前的顶发射有机发光显示盖板及其制作方法、显示装置，仍有待改进。However, the current top-emission organic light-emitting display cover plate and its manufacturing method and display device still need to be improved.
发明内容SUMMARY OF THE INVENTION
本发明是基于发明人对于以下事实和问题的发现和认识作出的：The present invention is made based on the inventors' findings and understanding of the following facts and problems:
发明人发现，目前顶发射AMOLED(被动式有机电致发光二极管)中的辅助阴极，其和阴极的电连接性能较差，常常存在不能有效连接而导致辅助阴极不能发挥作用的问题。发明人通过深入研究以及大量实验发现，这是由目前将辅助阴极和阴极电连接的导电材料及其设置位置、制作工艺存在缺陷造成的。目前的顶发射AMOLED工艺，通常将辅助阴极设置在背板上，但是将辅助阴极设置在有机发光显示背板上时，制作工艺较为复杂且较难实现，而且还面临走线短路的风险，产品良率无法保证。并且，由于需要将背板和盖板对盒封装，此时存在一定的挤压力等，因而造成设置在隔垫物周围的导电材料(例如ITO)很容易断裂，进而导致辅助阴极和阴极断路，不能有效电连接，辅助阴极不能有效地发挥作用，并且断裂的ITO还容易压碎阴极(例如氧化铟锌，IZO)，造成黑点问题，进而降低了有机发光显示面板的使用性能以及产品良率等。因此，如果能提出一种新的有机发光显示盖板，可以简便而有效地将设置在盖板上的辅助阴极和背板上的阴极电连接，将在很大程度上解决上述问题。The inventor found that the auxiliary cathode in the current top emission AMOLED (passive organic electroluminescent diode) has poor electrical connection performance with the cathode, and there is often a problem that the auxiliary cathode cannot function due to the ineffective connection. Through in-depth research and a large number of experiments, the inventor found that this is caused by the defects in the current conductive material that electrically connects the auxiliary cathode and the cathode, as well as its setting position and manufacturing process. In the current top-emission AMOLED process, the auxiliary cathode is usually arranged on the backplane, but when the auxiliary cathode is arranged on the backplane of the organic light emitting display, the manufacturing process is more complicated and difficult to realize, and there is also the risk of short circuit in the wiring. Yield cannot be guaranteed. In addition, since the back plate and the cover plate need to be encapsulated into the box, there is a certain pressing force at this time, so that the conductive material (such as ITO) arranged around the spacer is easily broken, thereby causing the auxiliary cathode and the cathode to be disconnected. , can not be effectively electrically connected, the auxiliary cathode can not function effectively, and the broken ITO can also easily crush the cathode (such as indium zinc oxide, IZO), causing black spot problems, which in turn reduces the use performance of the organic light emitting display panel and product quality rate etc. Therefore, if a new organic light emitting display cover plate can be proposed, the auxiliary cathode on the cover plate and the cathode on the back plate can be easily and effectively electrically connected, which will solve the above problems to a great extent.
本发明旨在至少一定程度上缓解或解决上述提及问题中至少一个。The present invention seeks to alleviate or solve at least one of the above-mentioned problems at least to some extent.
在本发明的一个方面，本发明提出了一种有机发光显示盖板。根据本发明的实施例，该有机发光显示盖板包括：衬底；辅助阴极，所述辅助阴极设置在所述衬底上；隔垫物，所述隔垫物设置在所述辅助阴极远离所述衬底的一侧，其中，所述隔垫物包括导电材料，且所述隔垫物与所述辅助阴极电性相连。由此，通过该隔垫物可以简便而有效地将该辅助阴极和有机发光显示背板的阴极电连接，不容易发生断路，可以较好地提高阴极的导电率，进而提高有机发光显示面板的使用性能以及产品良率。In one aspect of the present invention, the present invention provides an organic light emitting display cover plate. According to an embodiment of the present invention, the organic light emitting display cover plate includes: a substrate; an auxiliary cathode, the auxiliary cathode is disposed on the substrate; and a spacer, the spacer is disposed far from the auxiliary cathode. one side of the substrate, wherein the spacer includes a conductive material, and the spacer is electrically connected to the auxiliary cathode. Therefore, the auxiliary cathode can be electrically connected to the cathode of the organic light-emitting display backplane simply and effectively through the spacer, the circuit breakage is not easy to occur, the conductivity of the cathode can be better improved, and the performance of the organic light-emitting display panel can be improved. performance and product yield.
根据本发明的实施例，所述隔垫物包括具有弹性的柱状体，以及混合在所述柱状体中的导电颗粒，所述导电颗粒被配置为可形成连通所述柱状体的顶面以及底面的导电通路，其中，所述柱状体的所述顶面或者所述底面与所述辅助阴极相接触。由此，该混合了导电颗粒的柱状体，可以简便而有效地将辅助阴极和阴极电连接，不易造成断路，并且在背板和盖板对盒时，在挤压力的作用下更有利于导电颗粒之间的电传导，进一步提高了该有机发光显示盖板的使用性能以及产品良率。According to an embodiment of the present invention, the spacer includes an elastic columnar body, and conductive particles mixed in the columnar body, the conductive particles are configured to form a communication between the top surface and the bottom surface of the columnar body The conductive path, wherein the top surface or the bottom surface of the columnar body is in contact with the auxiliary cathode. Therefore, the columnar body mixed with conductive particles can easily and effectively connect the auxiliary cathode and the cathode electrically, and is not easy to cause an open circuit, and when the back plate and the cover plate are connected to the box, it is more conducive to the action of the pressing force under the action of the pressing force. The electrical conduction between the conductive particles further improves the use performance and product yield of the organic light-emitting display cover plate.
根据本发明的实施例，形成所述柱状体的材料包括聚苯乙烯；所述导电颗粒包括金属纳米导电球、碳纳米导电球的至少之一。由此，进一步提高了形成的隔垫物的弹性以及导电性能，提高了该有机发光显示盖板的使用性能以及产品良率。According to an embodiment of the present invention, the material for forming the columnar body includes polystyrene; the conductive particles include at least one of metal nano-conductive spheres and carbon nano-conductive spheres. Therefore, the elasticity and conductivity of the formed spacer are further improved, and the use performance and product yield of the organic light emitting display cover plate are improved.
根据本发明的实施例，所述隔垫物是由金属形成的，所述金属包括氧化铟锡、氧化铟锌、金、银、铜的至少之一。由此，直接由导电金属形成隔垫物，可以较好地将辅助阴极和阴极电连接，进一步提高了辅助阴极和阴极的连接效率，提高阴极的导电率，提高了该有机发光显示盖板的使用性能以及产品良率。According to an embodiment of the present invention, the spacer is formed of a metal, and the metal includes at least one of indium tin oxide, indium zinc oxide, gold, silver, and copper. Therefore, the spacer is directly formed of conductive metal, which can better electrically connect the auxiliary cathode and the cathode, further improve the connection efficiency of the auxiliary cathode and the cathode, improve the conductivity of the cathode, and improve the organic light emitting display cover plate. performance and product yield.
根据本发明的实施例，该有机发光显示盖板进一步包括：导电层，所述导电层设置在所述辅助阴极远离所述衬底的一侧，并且所述导电层环绕所述隔垫物设置。由此，该导电层可以和包括导电材料的隔垫物共同作用，较好地将辅助阴极和阴极电连接，提高阴极的导电率，提高了该有机发光显示盖板的使用性能。According to an embodiment of the present invention, the organic light emitting display cover plate further includes: a conductive layer, the conductive layer is disposed on a side of the auxiliary cathode away from the substrate, and the conductive layer is disposed around the spacer . Therefore, the conductive layer can work together with the spacer including the conductive material to better electrically connect the auxiliary cathode and the cathode, improve the conductivity of the cathode, and improve the use performance of the organic light-emitting display cover plate.
根据本发明的实施例，该有机发光显示盖板进一步包括：黑矩阵，所述黑矩阵设置在所述衬底上，且在所述衬底上限定出多个彩色显示区域；多个所述辅助阴极，所述辅助阴极设置在所述黑矩阵远离所述衬底的一侧，且所述辅助阴极在所述衬底上的正投影，位于所述黑矩阵在所述衬底上的正投影范围内。由此，该辅助阴极不会影响该有机发光显示盖板的显示区域以及显示性能，提高了该有机发光显示盖板的使用性能。According to an embodiment of the present invention, the organic light-emitting display cover plate further includes: a black matrix, the black matrix is disposed on the substrate, and a plurality of color display areas are defined on the substrate; a plurality of the The auxiliary cathode is arranged on the side of the black matrix away from the substrate, and the orthographic projection of the auxiliary cathode on the substrate is located on the positive side of the black matrix on the substrate. within the projection range. Therefore, the auxiliary cathode does not affect the display area and display performance of the organic light-emitting display cover plate, and the use performance of the organic light-emitting display cover plate is improved.
在本发明的另一方面，本发明提出了一种制作有机发光显示盖板的方法。根据本发明的实施例，该方法包括：提供衬底；在所述衬底上形成辅助阴极；在所述辅助阴极远离所述衬底的一侧形成隔垫物，所述隔垫物包括导电材料，且所述隔垫物与所述辅助阴极电性相连。由此，该方法可以利用该隔垫物简便地将辅助阴极和阴极电连接，不容易发生断路，可以较好地提高阴极的导电率，进而提高有机发光显示面板的使用性能以及产品良率。In another aspect of the present invention, the present invention provides a method for fabricating an organic light emitting display cover plate. According to an embodiment of the present invention, the method includes: providing a substrate; forming an auxiliary cathode on the substrate; forming a spacer on a side of the auxiliary cathode away from the substrate, the spacer comprising a conductive material, and the spacer is electrically connected to the auxiliary cathode. Therefore, in the method, the auxiliary cathode and the cathode can be easily and electrically connected by the spacer, the circuit breakage is not easy to occur, and the conductivity of the cathode can be better improved, thereby improving the usability and product yield of the organic light emitting display panel.
根据本发明的实施例，形成所述隔垫物包括：将导电颗粒与弹性材料混合，以便形成柱状的所述隔垫物，控制所述导电颗粒以及所述弹性材料的混合比例，以令所述导电颗粒可形成连通所述柱状的所述隔垫物的顶面以及底面的导电通路，其中，所述顶面或所述底面与所述辅助阴极相接触。由此，该方法可以简便地制作混合了导电颗粒和弹性材料的隔垫物，该隔垫物可以简便而有效地将辅助阴极和阴极电连接，不易造成断路，并且在背板和盖板对盒时，在挤压力的作用下更有利于导电颗粒之间的电传导，进一步提高了该有机发光显示盖板的使用性能以及产品良率。According to an embodiment of the present invention, forming the spacer includes: mixing conductive particles with an elastic material to form the columnar spacer, and controlling the mixing ratio of the conductive particles and the elastic material so that the The conductive particles may form a conductive path connecting the top surface and the bottom surface of the columnar spacer, wherein the top surface or the bottom surface is in contact with the auxiliary cathode. Therefore, the method can easily manufacture a spacer mixed with conductive particles and elastic materials, the spacer can easily and effectively connect the auxiliary cathode and the cathode electrically, is not easy to cause an open circuit, and is not easy to cause an open circuit, and the back plate and the cover plate are opposite to each other. When the box is assembled, the electric conduction between the conductive particles is more favorable under the action of the extrusion force, and the use performance and product yield of the organic light emitting display cover plate are further improved.
在本发明的又一方面，本发明提出了一种有机发光显示面板。根据本发明的实施例，该有机发光显示面板包括前面所述的有机发光显示盖板，或者包括前面所述的方法所制备的有机发光显示盖板。由此，该有机发光显示面板具有前面所述的有机发光显示盖板以及制作有机发光显示盖板的方法所制备的有机发光显示盖板所具有的全部特征以及优点，在此不再赘述。总的来说，该有机发光显示面板的使用性能较好，产品良率较高。In yet another aspect of the present invention, the present invention provides an organic light emitting display panel. According to an embodiment of the present invention, the organic light-emitting display panel includes the aforementioned organic light-emitting display cover plate, or includes the organic light-emitting display cover plate prepared by the aforementioned method. Therefore, the organic light-emitting display panel has all the features and advantages of the aforementioned organic light-emitting display cover plate and the organic light-emitting display cover plate prepared by the method for fabricating the organic light-emitting display cover plate, which will not be repeated here. In general, the organic light-emitting display panel has better performance and higher product yield.
在本发明的又一方面，本发明提出了一种显示装置。根据本发明的实施例，该显示装置包括前面所述的有机发光显示面板。由此，该显示装置具有前面所述的有机发光显示面板所具有的全部特征以及优点，在此不再赘述。总的来说，该显示装置使用性能较好，产品良率较高。In yet another aspect of the present invention, the present invention provides a display device. According to an embodiment of the present invention, the display device includes the aforementioned organic light emitting display panel. Therefore, the display device has all the features and advantages of the aforementioned organic light-emitting display panel, which will not be repeated here. In general, the display device has good performance and high product yield.
附图说明Description of drawings
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:
图1显示了根据本发明一个实施例的有机发光显示盖板的结构示意图；FIG. 1 shows a schematic structural diagram of an organic light-emitting display cover plate according to an embodiment of the present invention;
图2显示了根据本发明另一个实施例的有机发光显示盖板的结构示意图；FIG. 2 shows a schematic structural diagram of an organic light-emitting display cover plate according to another embodiment of the present invention;
图3显示了根据本发明又一个实施例的有机发光显示盖板的结构示意图；FIG. 3 shows a schematic structural diagram of an organic light-emitting display cover plate according to still another embodiment of the present invention;
图4显示了根据本发明又一个实施例的有机发光显示盖板的结构示意图；FIG. 4 shows a schematic structural diagram of an organic light-emitting display cover plate according to still another embodiment of the present invention;
图5显示了根据本发明又一个实施例的有机发光显示盖板的结构示意图；FIG. 5 shows a schematic structural diagram of an organic light-emitting display cover plate according to still another embodiment of the present invention;
图6显示了根据本发明又一个实施例的有机发光显示盖板的结构示意图；FIG. 6 shows a schematic structural diagram of an organic light-emitting display cover plate according to still another embodiment of the present invention;
图7显示了根据本发明又一个实施例的有机发光显示盖板的结构示意图；FIG. 7 shows a schematic structural diagram of an organic light emitting display cover plate according to still another embodiment of the present invention;
图8显示了根据本发明又一个实施例的有机发光显示盖板的结构示意图；FIG. 8 shows a schematic structural diagram of an organic light emitting display cover plate according to still another embodiment of the present invention;
图9显示了根据本发明一个实施例的制作有机发光显示盖板的方法流程图；FIG. 9 shows a flowchart of a method for fabricating an organic light-emitting display cover plate according to an embodiment of the present invention;
图10显示了根据本发明另一个实施例的制作有机发光显示盖板的方法流程图；FIG. 10 shows a flowchart of a method for fabricating an organic light-emitting display cover plate according to another embodiment of the present invention;
图11显示了根据本发明一个实施例的有机发光显示面板的结构示意图；以及FIG. 11 shows a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention; and
图12显示了根据本发明一个实施例的显示装置的结构示意图。FIG. 12 shows a schematic structural diagram of a display device according to an embodiment of the present invention.
附图标记说明：Description of reference numbers:
100：衬底；200：辅助阴极；300：隔垫物；10：导电颗粒；400：导电层；500：黑矩阵；600：彩色滤光膜；700：平坦化层；1000：有机发光显示盖板；1100：有机发光显示背板；1200：有机发光显示面板；1300：显示装置。100: substrate; 200: auxiliary cathode; 300: spacer; 10: conductive particles; 400: conductive layer; 500: black matrix; 600: color filter film; panel; 1100: organic light-emitting display backplane; 1200: organic light-emitting display panel; 1300: display device.
具体实施方式Detailed ways
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.
在本发明的一个方面，本发明提出了一种有机发光显示盖板。根据本发明的实施例，参考图1，有机发光显示盖板1000包括衬底100、辅助阴极200以及隔垫物300，其中，辅助阴极200设置在衬底100上(参考图1中所示出的辅助阴极200设置在衬底100的底部)，隔垫物300设置在辅助阴极200远离衬底100的一侧，其中，隔垫物300包括导电材料，且隔垫物300和辅助阴极200电性相连。由此，通过隔垫物300可以简便而有效地将辅助阴极200和有机发光显示背板的阴极(图中未示出，例如，参考图1，阴极位于隔垫物300的底部)电连接，辅助阴极200和阴极之间不容易发生断路，从而辅助阴极200可以较好地提高阴极的导电率，进而提高有机发光显示面板的使用性能以及产品良率。In one aspect of the present invention, the present invention provides an organic light emitting display cover plate. According to an embodiment of the present invention, referring to FIG. 1 , an organic light emitting
为了便于理解，下面对根据本发明实施例的有机发光显示盖板能够实现上述有益效果的原理进行简单说明：For ease of understanding, the following briefly describes the principle that the organic light-emitting display cover plate according to the embodiment of the present invention can achieve the above beneficial effects:
如前所述，在顶发射AMOLED(被动式有机电致发光二极管)中，辅助阴极和阴极之间的电性连接存在许多问题，例如，设置在辅助阴极以及隔垫物周围、用于电连接辅助阴极和阴极的导电材料(例如ITO)，在将背板和盖板对盒封装的过程中，由于存在一定的挤压力等，该导电材料(例如ITO)很容易断裂，进而导致辅助阴极和阴极断路，不能有效电连接，辅助阴极不能有效地发挥作用，并且还容易压碎阴极(例如氧化铟锌，IZO)，造成黑点问题，进而降低了有机发光显示面板的使用性能以及产品良率等。而根据本发明实施例的有机发光显示盖板，通过将辅助阴极制作在盖板上，并将隔垫物本身制作成可以导电的，从而该隔垫物可以简便而高效地将辅助阴极和阴极电连接。在该盖板和背板进行匹配制备显示装置时，仅需在背板上和隔垫物相接触的位置设置阴极或是与阴极电连接的导电层，即可实现阴极与辅助阴极之间的电连接，从而可以提高该显示装置中阴极的导电率，而无需在辅助阴极和隔垫物的外围专门设置用于电连接辅助阴极和阴极的导电材料，不仅节约了生产工艺，而且避免了该导电材料断裂造成的辅助阴极不能有效发挥作用等问题，提高了有机发光显示面板的使用性能以及产品良率。As mentioned before, in top emission AMOLED (passive organic electroluminescent diode), there are many problems with the electrical connection between the auxiliary cathode and the cathode, for example, the auxiliary cathode and the spacer are arranged around the auxiliary cathode for electrical connection. The conductive material (such as ITO) of the cathode and the cathode, in the process of packaging the back plate and the cover plate to the box, due to a certain extrusion force, the conductive material (such as ITO) is easily broken, which will lead to the auxiliary cathode and The cathode is disconnected, cannot be electrically connected effectively, the auxiliary cathode cannot function effectively, and it is easy to crush the cathode (such as indium zinc oxide, IZO), causing black spot problem, which in turn reduces the performance and product yield of the organic light-emitting display panel. Wait. In the organic light-emitting display cover plate according to the embodiment of the present invention, the auxiliary cathode is fabricated on the cover plate, and the spacer itself is made conductive, so that the spacer can easily and efficiently connect the auxiliary cathode and the cathode. electrical connection. When the cover plate and the back plate are matched to prepare a display device, only a cathode or a conductive layer electrically connected to the cathode needs to be arranged at the position where the back plate is in contact with the spacer, so that the connection between the cathode and the auxiliary cathode can be realized. It is electrically connected, so that the conductivity of the cathode in the display device can be improved, and there is no need to specially arrange a conductive material for electrically connecting the auxiliary cathode and the cathode on the periphery of the auxiliary cathode and the spacer, which not only saves the production process, but also avoids the Problems such as the ineffective functioning of the auxiliary cathode caused by the breakage of the conductive material improves the performance and product yield of the organic light emitting display panel.
根据本发明的实施例，隔垫物300的具体形状不受特别限制，只要能在盖板和背板对盒封装时起到支撑和连接作用、并且能将辅助阴极和阴极电性连接即可。具体的，参考图1以及图2，隔垫物300可以为柱状体，更具体的，隔垫物300的横截面可以为长方形(如图1所示出)、可以为梯形(如图2所示出)等。According to the embodiment of the present invention, the specific shape of the
根据本发明的实施例，隔垫物300包括导电材料，具体的，该导电材料的具体类型不受特别限制，例如，根据本发明的一些实施例，隔垫物300可以直接由金属形成，金属具有良好的导电性能，因此可以高效地将辅助阴极和阴极电连接，提高阴极的导电率，提高了该有机发光显示盖板的使用性能以及产品良率。具体的，形成隔垫物300的金属可以包括氧化铟锡、氧化铟锌、金、银、铜等的至少之一。由此，形成隔垫物300的金属材料来源广泛，并且导电性能良好。需要说明的是，由导电金属直接形成隔垫物300时，形成的隔垫物300是刚性的，没有弹力，此时，可以将与该盖板相配合的背板上的像素界定层制作成弹性的，从而可以保证盖板和背板的对盒弹力，便于盖板和背板对盒封装，形成有机发光显示面板。由于弹性材料也是制备像素界定层的常用材料，因此该设计并不会显著增大背板的制备成本。According to the embodiments of the present invention, the
根据本发明的另一些实施例，隔垫物300也可以是由弹性材料形成的，并通过在其中填充导电粒子，实现隔垫物的导电功能。具体的，参考图3，隔垫物300可以包括具有弹性的柱状体，该柱状体(即隔垫物300)的顶面或底面与辅助阴极200相接触(顶面和底面参考图3中所示出的顶、底方向，图3中所示出的是隔垫物300的顶面和辅助阴极200相接触)，由此，该隔垫物300可以保证盖板和背板的对盒弹力，并且，在该柱状体中可以混合导电颗粒10，导电颗粒10可以形成连通柱状体的顶面以及底面的导电通路。由此，该混合了导电颗粒10的柱状体，可以简便而有效地将辅助阴极200和阴极(图中未示出，通常设置在背板上)电连接，不易造成断路，提高阴极的导电率，并且在背板和盖板对盒时，在挤压力的作用下，各个导电颗粒10之间会相互挤压，有利于电传导，更有利于导电颗粒形成前面所述的导电通路，进一步提高了该有机发光显示盖板的使用性能以及产品良率。According to other embodiments of the present invention, the
根据本发明的实施例，形成柱状体的材料不受特别限制，只要具有弹性即可，例如，可以包括聚苯乙烯(PS)等。根据本发明的实施例，导电颗粒10的具体材料不受特别限制，例如导电颗粒10可以包括金属纳米导电球、碳纳米导电球的至少之一。由此，该导电颗粒的材料来源广泛，并且导电性能良好，进一步提高了形成的隔垫物的导电性能，提高了该有机发光显示盖板的使用性能以及产品良率。具体的，导电颗粒10可以为金球、银球等，可以为碳纳米导电球。或者，根据本发明的一个具体实施例，也可以将导电的碳纳米材料，包覆在诸如聚合物微球或是二氧化硅微球的外表面，形成复合导电颗粒。由此，碳纳米导电材料形成的复合颗粒的内核具有弹性，填充到弹性材料(用于形成弹性的柱状体)中后，可以进一步提高隔垫物的弹性，有利于盖板和背板的对盒封装，并且，在对盒过程中产生的挤压力下，该碳纳米导电球也更容易相互挤压，从而更加有效地将辅助阴极和阴极电连接。具体的，碳纳米材料的具体类型不受特别限制，例如可以是碳纳米管、碳纤维、石墨烯等。具体的，将导电颗粒10掺杂在柱状体中的具体方式不受特别限制，例如可以将导电颗粒10和形成柱状体的弹性材料(例如PS)按照一定的比例混合，并进行脱泡处理等。According to an embodiment of the present invention, the material forming the columnar body is not particularly limited as long as it has elasticity, for example, polystyrene (PS) and the like may be included. According to the embodiment of the present invention, the specific material of the
根据本发明的实施例，参考图4以及图5，该有机发光显示盖板1000可以进一步包括导电层400，导电层400设置在辅助阴极200远离衬底100的一侧，并且导电层400环绕隔垫物300设置。由此，该导电层400可以和包括导电材料的隔垫物300共同作用，较好地将辅助阴极200和阴极(图中未示出)电连接，提高阴极的导电率，提高了该有机发光显示盖板的使用性能。根据本发明的实施例，形成导电层400的具体材料不受特别限制，例如可以为ITO，由于ITO的功函数(最高占据轨道(HOMO)能级为5.3eV)与IZO形成的阴极(HOMO能级为5.2eV)的功函数值比较接近，因此，通过ITO制作导电层，并将其作为辅助阴极和阴极之间的爬坡连接电极时，电子传输快，进一步提高了阴极的导电率。根据本发明的实施例，导电层400的设置位置不受特别限制，只要能连接辅助阴极200和阴极即可，例如，参考图4，导电层400可以只设置在辅助阴极200以及隔垫物300的外围；参考图5，导电层400也可以设置在整个衬底100、辅助阴极200以及隔垫物300的外围。需要说明的是，由于目前制作有机盖板的工艺中，隔垫物自身不具有导电性，因此在辅助阴极以及隔垫物的外围设置导电层(例如ITO层)，来使辅助阴极和阴极电连接，而根据本发明实施例的有机发光显示盖板，隔垫物本身是可导电的，从而无需在辅助阴极以及隔垫物的外围设置导电层(例如ITO层)，即可将辅助阴极和阴极电连接。根据本发明的一些实施例，如前所述，原先的在辅助阴极以及隔垫物的外围设置导电层(例如ITO层)的制作工艺也可以继续保留，而仅仅将隔垫物制作成导电的即可，因此无需改变原有的生产工艺，即可提高制作的有机发光显示盖板的使用性能和产品良率。并且，在盖板和背板对盒时，即使该导电层(例如ITO层)断裂，隔垫物内部的导电颗粒可以将电传递给断裂的ITO，不会影响辅助阴极和阴极的电连接，并且，该导电层(例如ITO层)还进一步提高了辅助阴极和阴极之间的电连接效率，进一步提高了阴极的导电率，进一步提高了该有机发光显示盖板的使用性能。According to an embodiment of the present invention, referring to FIG. 4 and FIG. 5 , the organic light emitting
根据本发明的具体实施例，参考图6-图8，该有机发光显示盖板1000进一步包括：黑矩阵500和多个辅助阴极200(对应多个隔垫物300)，黑矩阵500设置在衬底100上，且在衬底100上限定出多个彩色显示区域，多个彩色显示区域中可以设置彩色滤光膜600，以便实现彩色化显示，例如，如图6所示，可以在3个彩色显示区域中分别设置红色滤光膜600A、绿色滤光膜600B以及蓝色滤光膜600C。在黑矩阵500和彩色滤光膜600的底部(如图所示的“底”方向)，可以设置平坦化层700。多个辅助阴极200可以设置在平坦化层700远离黑矩阵500以及彩色滤光膜600的一侧，与多个辅助阴极200对应的多个隔垫物300设置在辅助阴极200远离平坦化层700的一侧，具体的，隔垫物300可以为导电金属形成的(如图6所示)，隔垫物300也可以是由混合了导电颗粒10的弹性材料(例如PS)形成的(如图7所示)，进一步地，混合了导电颗粒10的弹性材料(例如PS)形成的隔垫物300的外围以及平坦化层700的底部也可以形成有导电层400(如图8所示出)。根据本发明的实施例，辅助阴极200在衬底100上的正投影，位于黑矩阵500在衬底100上的正投影范围内。由此，该辅助阴极200不会影响该有机发光显示盖板1000的彩色显示区域以及显示性能，提高了该有机发光显示盖板的使用性能。根据本发明的实施例，辅助阴极200在衬底100上的正投影，可以与黑矩阵500在衬底100上的正投影重合，由此，可以使设置的辅助阴极的面积尽可能大，从而尽可能较大地提高阴极的导电率，提高有机发光显示面板的使用性能。According to a specific embodiment of the present invention, referring to FIGS. 6-8 , the organic light emitting
在本发明的另一方面，本发明提出了一种制作有机发光显示盖板的方法。根据本发明的实施例，该方法制作的有机发光显示盖板可以为前面所述的有机发光显示盖板，由此，该方法制作的有机发光显示盖板可以具有前面所述的有机发光显示盖板所具有的全部特征以及优点，在此不再赘述。根据本发明的实施例，参考图9，该方法包括：In another aspect of the present invention, the present invention provides a method for fabricating an organic light emitting display cover plate. According to an embodiment of the present invention, the organic light emitting display cover plate fabricated by this method can be the aforementioned organic light emitting display cover plate, and thus, the organic light emitting display cover plate fabricated by this method can have the aforementioned organic light emitting display cover plate All the features and advantages of the board will not be repeated here. According to an embodiment of the present invention, referring to FIG. 9, the method includes:
S100：提供衬底S100: Provide substrate
在该步骤中，提供衬底。根据本发明的实施例，衬底100的具体类型不受特别限制，本领域技术人员可以根据实际需求进行选择。例如，根据本发明的实施例，衬底100可以为玻璃。In this step, a substrate is provided. According to the embodiment of the present invention, the specific type of the
根据本发明的实施例，为了进一步提高该方法制作的有机发光显示盖板的性能，参考图10，该方法可以进一步包括以下步骤：According to an embodiment of the present invention, in order to further improve the performance of the organic light-emitting display cover plate fabricated by the method, referring to FIG. 10 , the method may further include the following steps:
S10：形成黑矩阵S10: Form a black matrix
在该步骤中，在前面所述的衬底上形成黑矩阵。根据本发明的实施例，形成的黑矩阵可以在衬底上限定出多个彩色显示区域。具体的，形成黑矩阵的材料以及制作方法可以为本领域常规的技术手段，在此不再赘述。In this step, a black matrix is formed on the aforementioned substrate. According to an embodiment of the present invention, the formed black matrix may define a plurality of color display areas on the substrate. Specifically, the materials for forming the black matrix and the manufacturing method can be conventional technical means in the field, and details are not described herein again.
S20：形成彩色滤光膜S20: Forming a color filter film
在该步骤中，在前面所述的黑矩阵在衬底上限定出的多个彩色显示区域中，形成彩色滤光膜(CF层)，根据本发明的实施例，形成彩色滤光膜的具体方法不受特别限制，例如可以采用狭缝涂覆(slit coating)的方式涂覆CF材料，然后经过前烘、曝光、显影、后烘处理等，并将其图案化，以便形成彩色滤光膜。In this step, a color filter film (CF layer) is formed in the plurality of color display areas defined by the black matrix on the substrate. According to an embodiment of the present invention, the specific steps for forming the color filter film are The method is not particularly limited, for example, the CF material can be coated by slit coating, and then subjected to pre-baking, exposure, development, post-baking, etc., and patterned to form a color filter film .
S30：形成平坦化层S30: forming a planarization layer
在该步骤中，在前面所述的黑矩阵以及彩色滤光膜远离衬底的一侧形成平坦化层，以便提高该盖板的平整性，便于后续操作步骤的进行等。根据本发明的实施例，形成平坦化层的具体方法不受特别限制，例如可以采用旋涂(spin coating)的方式涂覆平坦化层材料，然后经过前烘、曝光、显影、后烘处理等，并将其图案化，以便形成平坦化层。具体的，形成的平坦化层的厚度可以在2微米左右。In this step, a planarization layer is formed on the aforementioned side of the black matrix and the color filter film away from the substrate, so as to improve the flatness of the cover plate and facilitate subsequent operation steps. According to the embodiment of the present invention, the specific method for forming the planarization layer is not particularly limited, for example, the planarization layer material may be coated by spin coating, and then subjected to pre-baking, exposure, development, post-baking treatment, etc. , and patterned to form a planarization layer. Specifically, the thickness of the formed planarization layer may be about 2 microns.
S200：形成辅助阴极S200: Forming an auxiliary cathode
在该步骤中，在前面所述的平坦化层上形成辅助阴极。根据本发明的实施例，形成辅助阴极的具体材料不受特别限制，只要具有较低的电阻，能够提高阴极的导电率即可。例如，可以为导电金属以及金属化合物，具体的，可以为钼/钕化铝/钼(Mo/AlNd/Mo)，可以为钕化钼/铜/钕化钼(MoNd/Cu/MoNd)等。根据本发明的实施例，辅助阴极的制备方法不受特别限制，例如，可以在平坦化层上，利用溅射(Sputter)设备依次沉积Mo/AlNd/Mo金属层，或者依次沉积MoNd/Cu/MoNd金属层，然后再金属层上涂覆光刻胶，并经过曝光、显影、刻蚀等工艺，制备出辅助阴极。In this step, an auxiliary cathode is formed on the aforementioned planarization layer. According to the embodiment of the present invention, the specific material for forming the auxiliary cathode is not particularly limited, as long as it has lower resistance and can improve the conductivity of the cathode. For example, conductive metals and metal compounds can be used, specifically, molybdenum/neodymium aluminum/molybdenum (Mo/AlNd/Mo), neodymium molybdenum/copper/neodymium molybdenum (MoNd/Cu/MoNd), and the like. According to the embodiment of the present invention, the preparation method of the auxiliary cathode is not particularly limited. For example, a Mo/AlNd/Mo metal layer, or MoNd/Cu/ The MoNd metal layer is then coated with photoresist on the metal layer, and an auxiliary cathode is prepared through processes such as exposure, development, and etching.
S300：形成隔垫物S300: Forming a spacer
在该步骤中，在前面所述的辅助阴极远离平坦化层的一侧形成隔垫物，其中，该隔垫物包括导电材料，且该隔垫物与辅助阴极电性相连。具体的，隔垫物的形状以及形成隔垫物的材料可以与前面描述的相同，在此不再赘述。例如，隔垫物可以是由导电金属形成的，也可以是由填充了导电颗粒的弹性材料形成的。根据本发明的实施例，可以将导电颗粒与弹性材料混合，以便形成柱状的隔垫物，控制导电颗粒以及弹性材料的混合比例，使得导电颗粒可形成连通柱状隔垫物的顶面以及底面的导电通路，其中，该顶面或底面与辅助阴极相接触。由此，该方法可以简便地制作混合了导电颗粒和弹性材料的隔垫物，该隔垫物可以简便而有效地将辅助阴极和阴极电连接，不易造成断路，并且在背板和盖板对盒时，在挤压力的作用下更有利于导电颗粒之间的电传导，进一步提高了该有机发光显示盖板的使用性能以及产品良率。In this step, a spacer is formed on the side of the aforementioned auxiliary cathode away from the planarization layer, wherein the spacer includes a conductive material, and the spacer is electrically connected to the auxiliary cathode. Specifically, the shape of the spacer and the material for forming the spacer may be the same as those described above, which will not be repeated here. For example, the spacer may be formed of a conductive metal or may be formed of an elastic material filled with conductive particles. According to the embodiment of the present invention, the conductive particles can be mixed with the elastic material to form a columnar spacer, and the mixing ratio of the conductive particles and the elastic material can be controlled so that the conductive particles can form a connection between the top surface and the bottom surface of the columnar spacer. A conductive path, wherein the top or bottom surface is in contact with the auxiliary cathode. Therefore, the method can easily manufacture a spacer mixed with conductive particles and elastic materials, the spacer can easily and effectively connect the auxiliary cathode and the cathode electrically, is not easy to cause an open circuit, and is not easy to cause an open circuit, and the back plate and the cover plate are opposite to each other. When the box is assembled, the electric conduction between the conductive particles is more favorable under the action of the extrusion force, and the use performance and product yield of the organic light emitting display cover plate are further improved.
根据本发明的具体实施例，弹性材料可以为PS，导电颗粒可以是Au球，也可以是炭纳米导电球，将导电颗粒(例如碳纳米导电球)填充到PS中，可以通过以下方法制备：将碳纳米导电球按照100：1-100：50掺杂到PS胶中，得到碳纳米导电PS预备材料；将该碳纳米导电PS预备材料进行脱泡处理，即可得到碳纳米导电PS胶(即掺杂了导电颗粒的弹性材料，即该隔垫物)。具体的，碳纳米导电球可以通过下面的方法制备：将碳纳米管粉末导入溶剂中，通过超声、搅拌处理、离心处理，取出上清液，获得碳纳米分散液；提供聚合物微球、或二氧化硅微球，将该聚合物微球、或二氧化硅微球等模板颗粒加入前面步骤获得的碳纳米分散液中，进行超声处理，得到分散均匀的碳纳米管或者聚合物微球混合液、或者碳纳米管和聚合物微球的混合液；将该碳纳米混合液进行离心、过滤、干燥处理，去除混合液的溶剂和杂质，以及模板颗粒，即可得到碳纳米导电球粉末。或者，根据本发明的一个具体实施例，也可以将导电的碳纳米材料，包覆在诸如聚合物微球或是二氧化硅微球的外表面，后期不去除碳纳米材料包覆的聚合物微球，形成复合导电颗粒。According to a specific embodiment of the present invention, the elastic material can be PS, and the conductive particles can be Au spheres or carbon nano-conducting spheres. Filling the conductive particles (such as carbon nano-conducting spheres) into PS can be prepared by the following method: The carbon nano-conductive spheres are doped into the PS glue according to 100:1-100:50 to obtain the carbon nano-conductive PS preparatory material; the carbon nano-conductive PS preparatory material is subjected to defoaming treatment to obtain the carbon nano-conductive PS glue ( That is, the elastic material doped with conductive particles, that is, the spacer). Specifically, the carbon nano-conducting spheres can be prepared by the following method: introducing carbon nanotube powder into a solvent, taking out the supernatant through ultrasonication, stirring, and centrifugation to obtain a carbon nano-dispersion; providing polymer microspheres, or Silica microspheres, adding the polymer microspheres, or template particles such as silica microspheres into the carbon nano-dispersion liquid obtained in the previous step, and performing ultrasonic treatment to obtain uniformly dispersed carbon nanotubes or polymer microspheres mixed liquid, or a mixed liquid of carbon nanotubes and polymer microspheres; centrifuge, filter, and dry the carbon nanometer mixed liquid to remove the solvent and impurities of the mixed liquid, as well as template particles, to obtain carbon nano-conductive ball powder. Alternatively, according to a specific embodiment of the present invention, conductive carbon nanomaterials can also be coated on the outer surface of polymer microspheres or silica microspheres, and the polymer coated by carbon nanomaterials is not removed later. microspheres to form composite conductive particles.
综上可知，该方法可以简便地制备自身能够导电的隔垫物，并且利用该隔垫物可简便地将辅助阴极和阴极电连接，不容易发生断路，可以较好地提高阴极的导电率，进而提高有机发光显示面板的使用性能以及产品良率。In summary, this method can easily prepare a spacer that can conduct electricity by itself, and the auxiliary cathode and the cathode can be easily electrically connected by using the spacer, which is not easy to open circuit, and can better improve the conductivity of the cathode. Further, the use performance and product yield of the organic light emitting display panel are improved.
在本发明的又一方面，本发明提出了一种有机发光显示面板。根据本发明的实施例，参考图11，该有机发光显示面板1200包括前面所述的有机发光显示盖板1100，或者包括前面所述的方法所制备的有机发光显示盖板，并且还包括设置在有机发光显示盖板1000底部的有机发光显示背板1100，有机发光显示盖板1000和有机发光显示背板1100通过隔垫物300互相连接。如前所述，盖板1000的隔垫物300自身具有导电性，且与辅助阴极电连接。此时仅需要在有机发光显示背板1100和隔垫物300相接触的位置处，设置阴极，或是与阴极电连接的导电结构，即可实现辅助阴极与阴极之间的电连接。由此，该有机发光显示面板具有前面所述的有机发光显示盖板以及制作有机发光显示盖板的方法所制备的有机发光显示盖板所具有的全部特征以及优点，在此不再赘述。总的来说，该有机发光显示面板的使用性能较好，产品良率较高。In yet another aspect of the present invention, the present invention provides an organic light emitting display panel. According to an embodiment of the present invention, referring to FIG. 11 , the organic light-emitting
在本发明的有一方面，本发明提出了一种显示装置。根据本发明的实施例，参考图12，该显示装置1300包括前面所述的有机发光显示面板。由此，该显示装置具有前面所述的有机发光显示面板所具有的全部特征以及优点，在此不再赘述。总的来说，该显示装置使用性能较好，产品良率较高。In one aspect of the present invention, the present invention provides a display device. According to an embodiment of the present invention, referring to FIG. 12 , the
在本发明的描述中，术语“上”、“下”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明而不是要求本发明必须以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention. It is not a requirement that the present invention be constructed and operated in a particular orientation and is therefore not to be construed as a limitation of the present invention.
在本说明书的描述中，参考术语“一个实施例”、“另一个实施例”等的描述意指结合该实施例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In the description of this specification, description with reference to the terms "one embodiment", "another embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention . In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.
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