WO2020037707A1 - 一种oled器件 - Google Patents

一种oled器件 Download PDF

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Publication number
WO2020037707A1
WO2020037707A1 PCT/CN2018/103482 CN2018103482W WO2020037707A1 WO 2020037707 A1 WO2020037707 A1 WO 2020037707A1 CN 2018103482 W CN2018103482 W CN 2018103482W WO 2020037707 A1 WO2020037707 A1 WO 2020037707A1
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Prior art keywords
block
oled device
static
anode
trace
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PCT/CN2018/103482
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English (en)
French (fr)
Inventor
冯纪恒
李扬
罗志猛
赵云
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信利半导体有限公司
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Publication of WO2020037707A1 publication Critical patent/WO2020037707A1/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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals

Definitions

  • the invention relates to the field of display technology, and more particularly, to an OLED device.
  • OLED display technology In recent years, with the rapid development of OLED display technology, it has gradually occupied an important share in the fierce market competition. Compared with other display technologies, OLED displays have excellent characteristics such as self-emission, wide viewing angle, wide color gamut, low operating voltage, high luminous efficiency, and device flexibility, which makes them widely used in display and lighting fields. However, OLED displays also face the disadvantages of poor reliability and low life.
  • Edge peripheral traces on OLED substrates usually include anode traces and cathode traces. Due to production processes and manufacturing processes, there are usually some blank areas between the anode traces and cathode traces of OLED devices. It is close to the outside of the OLED device and is exposed to the air, which causes it to work under high temperature and high humidity conditions. It is very prone to electrochemical corrosion. It has been found in practice that this electrochemical corrosion phenomenon occurs on the anode trace near the cathode trace. The probability is greater and the harm is serious.
  • the solution in the prior art is to cover the area with an organic or inorganic coating, but the organic coating is generally poor in water vapor resistance, and the inorganic coating is too thin, and the etching is difficult and the cost is too high.
  • the technical problem to be solved by the present invention is to provide an OLED device. Since the blank area of the peripheral peripheral wiring is provided with an anti-static block and the anti-static block is located outside the anode wiring, the device is generated when the device is powered on and off and the environment changes. The internal static electricity can be dispersed on the anti-static block to prevent the OLED device from being injured. At the same time, the anti-static block is further outside than the anode wiring. When electrochemical corrosion occurs, the anti-static block will be preferentially corroded, thereby protecting the anode wiring from being The damage of electrochemical corrosion guarantees the normal operation of the anode wiring to improve the reliability of the OLED device.
  • the present invention provides an OLED device, which includes an OLED substrate and an edge peripheral trace provided on the OLED substrate.
  • the edge peripheral trace includes an anode trace, and an antistatic block is provided outside the anode trace.
  • a cathode wiring is provided on one side of the anode wiring, and the antistatic block is made of the same material as the peripheral wiring, and the anode wiring, the antistatic block, and the cathode wiring are made by wet engraving. .
  • the anti-static block is filled along the periphery of the edge.
  • the width of the anti-static block is equal to the width of the edge peripheral trace.
  • the anti-static block is divided into multiple pieces, and the width of each anti-static block is less than 0.2 mm.
  • the shape of the anti-static block is a quadrangle, a triangle, a circle, or a polygon.
  • the invention has the following beneficial effects: Since the blank area of the peripheral peripheral wiring is provided with an antistatic block and the antistatic block is located outside the anode wiring, the internal static electricity generated when the device is turned on and off and the environment changes can be dispersed to the antistatic block. In addition, the OLED device is prevented from being injured, and at the same time, the anti-static block is further outside than the anode wiring. When electrochemical corrosion occurs, the anti-static block will be preferentially corroded, thereby protecting the anode wiring from the damage of electrochemical corrosion and protecting the anode. The wiring runs normally to improve the reliability of the OLED device.
  • the anti-static block is made of the same material as the outer peripheral wiring.
  • the anode, anti-static, and cathode tracks are formed by wet engraving, which not only keeps the anode, anti-static block, and cathode tracks at a certain distance, but also The required structure can be wet-etched at one time, reducing processing steps, which does not need to change the existing process, and does not increase production costs.
  • FIG. 1 is a schematic structural diagram of an OLED device provided by the present invention.
  • Figure 2 is a schematic diagram of the distribution of anti-static blocks in the non-wired area.
  • FIG. 3 is a schematic diagram of the distribution of the ESD blocks in the display area and the wiring area.
  • FIG. 4 is a schematic structural diagram of another OLED device provided by the present invention.
  • FIG. 5 is a cross-sectional view of the back cover in FIG. 4.
  • FIG. 6 is a schematic structural diagram of still another OLED device provided by the present invention.
  • FIG. 7 is a cross-sectional view of the back cover in FIG. 6.
  • FIG. 1 provides an OLED device according to the present invention.
  • the OLED device includes an OLED substrate and an edge peripheral trace provided on the OLED substrate.
  • the edge peripheral trace includes an anode trace 1 and an anode trace 1.
  • An anti-static block 3 is provided on the outer side of the cathode wiring 2 on the side of the anode wiring 1.
  • the anode trace 1 is placed on the innermost side
  • the antistatic block 3 is placed on the middle
  • the cathode trace 2 is placed on the outermost side.
  • the cathode trace 2 may also be placed on the innermost side, as long as The anti-static block 3 may be provided outside the anode wiring 1, and the position of the cathode wiring 2 is not limited.
  • the anti-static block 3 As the anti-static block 3 is set in the blank area of the peripheral peripheral wiring and the anti-static block 3 is located outside the anode wiring 1, the static electricity generated inside the OLED device when the OLED device is turned on and off and the environment changes can be dissipated to the anti-static block. 3, to prevent OLED devices from being injured, and at the same time, the anti-static block 3 is further outside than the anode wiring 1.
  • the anti-static block 3 will be preferentially corroded, thereby protecting the anode wiring 1 from electrochemical corrosion. This will ensure the normal operation of anode trace 1 to improve the reliability of the OLED device.
  • the anti-static block 3 is made of the same material as the outer peripheral wiring, and the anode wiring 1, the anti-static block 3 and the cathode wiring 2 are formed by wet engraving, which not only makes the anode wiring 1, the anti-static
  • the block 3 and the cathode wiring 2 are maintained at a certain distance, and the required structure can be wet-etched at one time, reducing the processing steps. It does not need to change the existing process, does not increase production costs, and can also maintain its background color. Coordinate and increase its beauty.
  • the anti-static block 3 is filled along the periphery of the edge to make the filling of the anti-static block 3 more uniform.
  • the width of the anti-static block 3 is equal to the width of the edge peripheral trace.
  • the number of the anti-static blocks 3 is increased by reducing the size of the anti-static blocks 3, thereby improving the anti-static capability, and avoiding the excessive current from damaging the OLED device.
  • the width of the anti-static block 3 is less than 0.1 mm, its length is less than 1 mm, in order to reduce the size of the anti-static block 3 and increase the number of the anti-static blocks 3, thereby improving the anti-static capability and avoiding excessive current to damage the OLED. Device.
  • the anti-static block 3 is divided into multiple pieces, and the width of each anti-static block 3 is less than 0.2 mm, in order to reduce the size of the anti-static block 3 and increase the resistance.
  • the number of electrostatic blocks 3 further improves the antistatic ability, avoids the excessive current from damaging the OLED device, and also prevents the static electricity block 3 and the peripheral wires from generating static electricity.
  • the edge peripheral wiring further includes an electrode wiring and an auxiliary electrode
  • the electrode wiring is an ITO material
  • the auxiliary electrode is a metal material with high conductivity, which is located above the electrode wiring.
  • the material of the auxiliary electrode is Ag, Mo / Al / Mo, Ti / Cu / Ti, Cr / Cu / Cr and other metal materials. In order to obtain better stability and corrosion resistance, the auxiliary electrode is usually the preferred alloy material.
  • the interval between the anti-static block 3 and the electrode traces needs to be greater than the interval between adjacent electrode traces.
  • the shape of the anti-static block 3 is a quadrangle, and may also be a triangle, a polygon, or a circle.
  • the anti-static of OLEDs is mainly solved by providing a static shielding layer or an anti-static line.
  • the shielding layer is generally made of ITO. Although it can shield external static electricity, it is rarely used due to light loss.
  • the anti-static line due to the limitation of the spatial wiring of the OLED device, the anti-static line can only be limited to the peripheral routing area. The anti-static line cannot be arranged inside the OLED device. Therefore, when the static electricity generated in the OLED device is relatively large, Easy to cause damage to OLED devices.
  • the OLED substrate has a display area 5 and a non-display area.
  • the non-display area of the OLED substrate is further provided with edge traces 4.
  • the anti-static block 3 has multiple It is also disposed between the edge trace 4 and the display area 5, between the edge trace 4 and the edge trace 4, and the edge non-trace area. Since the OLED device generates static electricity in the OLED device when the environment changes due to power on and off, packaging, and transportation, although the frequency of static electricity is low, when it generates static electricity, the instantaneous current is large. Anti-static block 3, which can share the electrostatic part inside the OLED device to the anti-static block 3 to reduce its current to avoid electrostatic damage caused by excessive current in the OLED device. The number of anti-static blocks 3 can be set as required To reduce the current.
  • the anti-static block 3 between the edge trace 4 and the display area 5, between the edge trace 4 and the edge trace 4 and the edge non-trace area can also be set outside the anode to make it electrochemical.
  • the anti-static block 3 is preferentially corroded during the corrosion, thereby protecting the edge trace 4 from being corroded and improving the stability of the OLED device.
  • the distance between the end of the dot matrix line and the anti-static block 3 is greater than 0.02 mm, so as to avoid generation of static electricity when the distance is too small.
  • the dot matrix lines correspond one-to-one with the anti-static block 3, specifically, their positions and widths correspond one-to-one in order to make pixel grids.
  • the OLED device further includes a back cover 7 corresponding to the OLED substrate 6. At least one first groove surrounding the display area is defined on the upper surface of the back cover 7. 8.
  • the cavity formed by the OLED substrate 6 and the back cover 7 is filled with a desiccant 9, and the OLED substrate 6 and the back cover 7 are fixed by the edge sealant 10.
  • the back cover 7 and the OLED substrate 6 squeeze the desiccant 9 to fill the display area 5, which can further reduce the pressure difference between the inside and outside of the OLED device, make the back cover 7 difficult to break, and more easily block the diffusion of moisture and oxygen;
  • the fluidity of the desiccant 9, the desiccant 9 can partially overflow into the first groove 8, that is, the first groove 8 outside the display area 5 is not filled, so that the desiccant 9 can not impact the edge sealant 10.
  • the bottom is in full contact with the edge banding adhesive 10, because the non-filled desiccant 9 is located outside the display area 5, the uneven reflection of the edges of the desiccant 9 will not cause the display area 5 to display unevenness.
  • the structure of the OLED device is more reasonable, and the back cover 7 has better strength and rigidity, and is not easily broken.
  • At least one second groove 11 is provided on an upper surface of the back cover 7 in an area formed by the first groove 8, and the desiccant 9 is filled in the OLED.
  • the back cover 7 can have a larger filling space, which is convenient for filling more desiccant 9 and increasing water absorption. And oxygen uptake.
  • At least one reinforcing rib is reserved in the second groove 11, and the reinforcing rib can further improve the strength and rigidity of the rear cover 7.
  • the depth of the first groove 8 is equal to the depth of the second groove 11, and the groove depths can be formed at one time to simplify the process and save costs.

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Abstract

一种OLED器件，其包括OLED基板和设于OLED基板上的边缘外围走线，所述边缘外围走线包括阳极走线（1）和设于阳极走线（1）外的阴极走线（2），所述阳极走线（1）和阴极走线（2）之间设有防静电块（3）。阳极走线（1）设于最里边，防静电块（3）放置于中间，阴极走线（2）设于最外边，由于边缘外围走线的空白区域设置有防静电块（3）且防静电块（3）位于阳极走线（1）的外侧，器件在通断电以及环境变化时产生的内部静电可分散至防静电块（3）上，避免OLED器件被击伤，同时防静电块（3）比阳极走线（1）更靠外，当发生电化学腐蚀时，会优先腐蚀防静电块（3），从而保护阳极走线（1）免于电化学腐蚀的伤害，保障阳极走线（1）正常运行，以提升OLED器件的可靠性。

Description

一种OLED器件 技术领域
本发明涉及一种显示技术领域，更具体地说，涉及一种OLED器件。
 背景技术
近年来，随着OLED显示技术的迅猛发展，使其逐渐在激烈的市场竞争中占据重要份额。与其他的显示技术相比，OLED显示器具有自发光、广视角、广色域、低工作电压、高发光效率以及器件可柔性化等优良特性，使其广泛应用于显示及照明领域。然而，OLED显示器同时也面临可靠性差、寿命低的弱点。
OLED基板上的边缘外围走线通常包括阳极走线和阴极走线，由于生产工艺与制程的原因，在OLED器件的阳极走线与阴极走线之间通常会存在部分空白区域，且由于该部分靠近OLED器件的外侧，裸露在空气中，导致其在高温高湿的条件下进行工作，非常容易发生电化学腐蚀，实践发现，这种电化学腐蚀现象在靠近阴极走线的阳极走线上出现概率较大，危害严重。现有技术的解决办法是在该区域覆盖有机或无机涂层，但有机涂层防水汽能力普遍较差，而无机镀层又太薄，且蚀刻难度大、成本太高。
 技术问题
本发明所要解决的技术问题是提供了一种OLED器件，由于边缘外围走线的空白区域设置有防静电块且防静电块位于阳极走线的外侧，器件在通断电以及环境变化时产生的内部静电可分散至防静电块上，避免OLED器件被击伤，同时防静电块比阳极走线更靠外，当发生电化学腐蚀时，会优先腐蚀防静电块，从而保护阳极走线免于电化学腐蚀的伤害，保障阳极走线正常运行，以提升OLED器件的可靠性。
 技术解决方案
本发明所要解决的技术问题通过以下技术方案予以实现：
本发明提供了一种OLED器件，其包括OLED基板和设于OLED基板上的边缘外围走线，所述边缘外围走线包括阳极走线，所述阳极走线外侧设有防静电块。
进一步地，所述阳极走线一侧设有阴极走线，所述防静电块与所述边缘外围走线的材料相同，所述阳极走线、防静电块和阴极走线通过湿刻制成。
进一步地，所述防静电块沿着所述边缘外围走线填充。
进一步地，所述边缘外围走线的宽度小于等于0.2mm时，所述防静电块的宽度等于所述边缘外围走线的宽度。
进一步地，所述边缘外围走线的宽度大于0.2mm时，所述防静电块分割成多块，每块防静电块的宽度小于0.2mm。
进一步地，所述防静电块的形状为四边形、三角形、圆形或多边形。
 有益效果
本发明具有如下有益效果：由于边缘外围走线的空白区域设置有防静电块且防静电块位于阳极走线的外侧，器件在通断电以及环境变化时产生的内部静电可分散至防静电块上，避免OLED器件被击伤，同时防静电块比阳极走线更靠外，当发生电化学腐蚀时，会优先腐蚀防静电块，从而保护阳极走线免于电化学腐蚀的伤害，保障阳极走线正常运行，以提升OLED器件的可靠性。
防静电块与所述边缘外围走线的材料相同，阳极走线、防静电块和阴极走线通过湿刻形成，不仅使阳极走线、防静电块和阴极走线保持有一定的间隔，还可一次性湿刻出所需要的结构，减少了加工工序，其无需改变现有工艺，不会增加生产成本。
 附图说明
图1为本发明提供的一种OLED器件的结构示意图。
图2为非走线区防静电块的分布示意图。
图3为显示区与走线区的防静电块的分布示意图。
图4为本发明提供的另一种OLED器件的结构示意图。
图5为图4中后盖的剖视图。
图6为本发明提供的又一种OLED器件的结构示意图。
图7为图6中后盖的剖视图。
 本发明的实施方式
下面结合实施例对本发明进行详细的说明，实施例仅是本发明的优选实施方式，不是对本发明的限定。
请参阅图1，为本发明提供了一种OLED器件，其包括OLED基板和设于OLED基板上的边缘外围走线，所述边缘外围走线包括阳极走线1和设于阳极走线1一侧的阴极走线2，所述阳极走线1外侧设有防静电块3。在本实施例中，阳极走线1设于最里边，防静电块3放置于中间，阴极走线2设于最外边，在其他实施例中，阴极走线2也可以设置在最里面，只要防静电块3设于阳极走线1外侧即可，阴极走线2的位置不受限制。由于边缘外围走线的空白区域设置有防静电块3且防静电块3位于阳极走线1的外侧，OLED器件在通断电以及环境变化时在OLED器件内部产生的静电可分散至防静电块3上，避免OLED器件被击伤，同时防静电块3比阳极走线1更靠外，当发生电化学腐蚀时，会优先腐蚀防静电块3，从而保护阳极走线1免于电化学腐蚀的伤害，保障阳极走线1正常运行，以提升OLED器件的可靠性。
进一步地，所述防静电块3与所述边缘外围走线的材料相同，所述阳极走线1、防静电块3和阴极走线2通过湿刻形成，不仅使阳极走线1、防静电块3和阴极走线2保持有一定的间隔，还可一次性湿刻出所需要的结构，减少了加工工序，其无需改变现有工艺，不会增加生产成本，同时还可以使其底色保持协调，增加其美感。
进一步地，所述防静电块3沿着所述边缘外围走线填充，以使防静电块3填充更加均匀。
进一步地，所述边缘外围走线的宽度小于等于0.2mm时，所述防静电块3的宽度等于所述边缘外围走线的宽度。以降低防静电块3的尺寸而增加防静电块3的数量，进而提高抗静电能力，避免电流过大而损坏OLED器件。
进一步地，当防静电块3的宽度小于0.1mm时，其长度小于1mm，以降低防静电块3的尺寸而增加防静电块3的数量，进而提高抗静电能力，避免电流过大而损坏OLED器件。
进一步地，所述边缘外围走线的宽度大于0.2mm时，所述防静电块3分割成多块，每块防静电块3的宽度小于0.2mm，以降低防静电块3的尺寸而增加防静电块3的数量，进而提高抗静电能力，避免电流过大而损坏OLED器件，同时也避免了防静电块3与边缘外围走线产生静电。
进一步地，边缘外围走线还包括电极走线和辅助电极，电极走线为ITO材料，辅助电极为具有高导电率的金属材料，位于电极走线的上方。辅助电极的材料为Ag、Mo/Al/Mo、Ti/Cu/Ti、Cr/Cu/Cr等金属材料，为了获得更好的稳定性和抗腐蚀性能，通常辅助电极首选合金材料。
进一步地，为了防止电极走线与防静电块3相连，防静电块3与电极走线之间的间距需大于相邻电极走线之间的间距。
进一步地，所述防静电块3的形状为四边形，也可以是三角形、多边形或圆形。
目前，OLED的防静电主要采用设置静电屏蔽层或者设置防静电线等方法来解决。屏蔽层一般采用ITO，虽然能起到屏蔽外部静电的作用，但由于有光损失而较少被采用。而对于防静电线来说，由于OLED器件空间布线的限制，防静电线只能局限在边缘外围走线区域，OLED器件内部是无法布设防静电线的，所以OLED器件内部产生静电较大时，容易对OLED器件造成损伤。请参阅图2和图3，进一步地，所述OLED基板具有显示区5和非显示区，所述OLED基板的非显示区上还设有边缘走线4，所述防静电块3有多个，其还分别设于边缘走线4与显示区5之间、边缘走线4与边缘走线4之间和边缘非走线区。由于OLED器件在通断电及包装、运输等导致环境变化的情况时才会在OLED器件内部产生静电，虽然产生静电的频次较低，但当其产生静电时，瞬时电流较大，由于设置有防静电块3，其可使OLED器件内部的静电部分分担至防静电块3上，使其电流降低，以避免OLED器件内部电流过大造成静电损伤，防静电块3的数量可以根据需求设置多个，以降低电流。
同理，边缘走线4与显示区5之间、边缘走线4与边缘走线4之间和边缘非走线区的防静电块3也可以设置在其阳极外侧，以使其发生电化学腐蚀时优先腐蚀防静电块3，从而保护边缘走线4不被腐蚀，提高OLED器件的稳定性。
进一步地，点阵线末端与防静电块3的距离大于0.02mm，以避免距离过小时产生静电。点阵线与防静电块3一一对应，具体地说，其位置与宽度均一一对应，以便制成做像素格。
请参阅图4和图5，进一步地，所述OLED器件还包括与所述OLED基板6相对应的后盖7，所述后盖7上表面开设有至少一个环绕着显示区的第一凹槽8，所述OLED基板6和所述后盖7所形成的空腔内填充有干燥剂9，所述OLED基板6和所述后盖7通过封边胶10固定。封装时，后盖7与OLED基板6挤压干燥剂9，将显示区5充满，可进一步减少OLED器件内外的压力差，使后盖7不易破裂，且更易于阻挡水分和氧气的扩散；由于干燥剂9的流动性，干燥剂9可部分溢出至第一凹槽8内，即显示区5外的第一凹槽8未被充满，可使干燥剂9在不冲击封边胶10的情况下与封边胶10充分接触，由于未充满的干燥剂9位于显示区5外，所以干燥剂9的边缘反光不一致不会使显示区5显示不均匀。与传统技术相比，该OLED器件结构更合理，后盖7强度和刚性更佳，不易破裂。
请参阅图6和图7，进一步地，所述后盖7上表面于所述第一凹槽8形成的区域内设有至少一个第二凹槽11，所述干燥剂9充满于所述OLED基板6与所述第二凹槽11形成的空腔内，在保证后盖7强度和刚性的同时，可使后盖7有更大的填充空间，便于填充更多的干燥剂9，增加吸水和吸氧量。
进一步地，所述第二凹槽11内保留有至少一个加强筋，加强筋可进一步提升后盖7的强度和刚性。
进一步地，所述第一凹槽8的深度等于所述第二凹槽11的深度，凹槽深度相等可一次成型，简化工艺，节约成本。
尽管本发明的内容已经通过上述优选实施例作了详细介绍，但应当认识到上述的描述不应被认为是对本发明的限制。在本领域技术人员阅读了上述内容后，对于本发明的多种修改和替代都将是显而易见的。因此，本发明的保护范围应由所附的权利要求来限定。

Claims (6)

  1. 一种OLED器件，其特征在于，其包括OLED基板和设于OLED基板上的边缘外围走线，所述边缘外围走线包括阳极走线，所述阳极走线外侧设有防静电块。
  2. 根据权利要求1所述的OLED器件，其特征在于，所述阳极走线一侧设有阴极走线，所述防静电块与所述边缘外围走线的材料相同，所述阳极走线、防静电块和阴极走线通过湿刻制成。
  3. 根据权利要求1所述的OLED器件，其特征在于，所述防静电块沿着所述边缘外围走线填充。
  4. 根据权利要求1所述的OLED器件，其特征在于，所述边缘外围走线的宽度小于等于0.2mm时，所述防静电块的宽度等于所述边缘外围走线的宽度。
  5. 根据权利要求1所述的OLED器件，其特征在于，所述边缘外围走线的宽度大于0.2mm时，所述防静电块分割成多块，每块防静电块的宽度小于0.2mm。
  6. 根据权利要求1所述的OLED器件，其特征在于，所述防静电块的形状为四边形、三角形、圆形或多边形。
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