WO2015169047A1 - Oled显示面板及应用其的oled显示装置 - Google Patents

Oled显示面板及应用其的oled显示装置 Download PDF

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Publication number
WO2015169047A1
WO2015169047A1 PCT/CN2014/088076 CN2014088076W WO2015169047A1 WO 2015169047 A1 WO2015169047 A1 WO 2015169047A1 CN 2014088076 W CN2014088076 W CN 2014088076W WO 2015169047 A1 WO2015169047 A1 WO 2015169047A1
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Prior art keywords
cathode
oled display
spacer
display panel
auxiliary electrode
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PCT/CN2014/088076
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English (en)
French (fr)
Inventor
王辉锋
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京东方科技集团股份有限公司
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Priority to US14/435,970 priority Critical patent/US9793508B2/en
Publication of WO2015169047A1 publication Critical patent/WO2015169047A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/824—Cathodes combined with auxiliary electrodes
    • 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
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80522—Cathodes combined with auxiliary electrodes
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8723—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/302—Details of OLEDs of OLED structures
    • H10K2102/3023—Direction of light emission
    • H10K2102/3026—Top emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8423—Metallic sealing arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • 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
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8721—Metallic sealing arrangements
    • 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants

Definitions

  • Embodiments of the present invention relate to an OLED display panel and an OLED display device using the same.
  • the organic light emitting diode (OLED) display panel has the advantages of self-luminous, fast response, wide viewing angle, high brightness, colorful, light and thin, and has been widely recognized by people.
  • the structure of an OLED generally includes an anode layer, a cathode layer, and a light-emitting layer disposed between the anode layer and the cathode layer.
  • the luminescence mechanism of the OLED is: when a voltage is applied between the anode layer and the cathode layer, the hole injected from one side of the anode layer overcomes the interface barrier and is transmitted to the luminescent layer under the driving of the external voltage, and the cathode layer The electrons injected on one side overcome the interface barrier and are transmitted into the luminescent layer.
  • the holes and electrons reaching the luminescent layer recombine to form excitons in the luminescent layer, and the exciton radiation illuminates to generate luminescence, that is, electroluminescence.
  • the OLED display panel can be divided into two types: top emission and bottom emission; the OLED display panel includes a pixel array.
  • the cathode In order to increase the transmittance of light, the cathode needs to use a thin transparent conductive material, but the thin transparent cathode has a large square resistance, and a large voltage drop occurs when current flows through the cathode. Therefore, the distance from the power supply point is higher. The smaller the cathode voltage obtained on the far pixel, the lower the display luminance of the pixel is compared to the display luminance of the pixel closer to the power supply point, thereby making the luminance uniformity of the OLED display device worse.
  • At least one embodiment of the present invention provides an OLED display panel and an OLED display device using the same, which can avoid an open circuit between the auxiliary electrode and the cathode which is easily caused by excessive pressure on the box in the top emission type OLED display panel.
  • At least one embodiment of the present invention provides an OLED display panel, comprising: an array substrate, the array substrate is covered with a cathode; a color filter substrate, an auxiliary electrode is formed on the color filter substrate; and the color filter substrate is disposed on the color filter substrate Contact structure between the array substrates.
  • the contact structure makes the cathode And the auxiliary electrode is electrically connected, and an area of the contact structure and the contact portion of the array substrate is greater than or equal to an area of the contact portion of the auxiliary electrode and the contact structure.
  • the contact structure includes a spacer formed on the color filter substrate and a transparent conductive film, the spacer being formed on the auxiliary electrode, the transparent conductive film covering the substrate a surface of the color filter substrate, and covering at least the surface of the spacer and the auxiliary electrode not blocked by the spacer; the pixel defining layer of the array substrate has a depression corresponding to the spacer
  • the cathode is also covered on the surface of the recess; the surface of the color filter substrate covering the transparent conductive film is inserted into the surface of the array substrate and covered with the recess of the cathode in.
  • the surface shape of the depressed portion after the surface covers the cathode matches the surface shape of the spacer after the surface contained therein covers the transparent conductive film.
  • a conductive paste is filled between the spacer after the surface of the recessed portion covering the transparent conductive film and the cathode in the recess.
  • the contact structure includes a spacer formed on a flat layer of the color filter substrate, the auxiliary electrode is located at a top end of the spacer; and a pixel defining layer of the array substrate a position corresponding to the spacer has a depressed portion; the cathode further covers the surface of the recess; the end of the color filter substrate is formed with a spacer of the auxiliary electrode inserted into the surface of the array substrate Covered in the recess of the cathode.
  • a surface of the array substrate covers a surface shape of the depressed portion after the cathode, and a surface shape of the spacer formed with the auxiliary electrode at an end portion of the color filter substrate accommodated therein match.
  • the spacer accommodated in the end portion of the depressed portion is formed with the auxiliary electrode, and the conductive paste is filled between the cathode in the depressed portion.
  • a gap between the array substrate and the color filter substrate is filled with a transparent conductive paste, and the transparent conductive paste is at least filled between the auxiliary electrode and the cathode to form The contact structure.
  • At least one embodiment of the present invention provides an OLED display device including the above OLED display panel.
  • FIG. 1 is a schematic structural view of an OLED display panel
  • FIG. 2 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of the OLED display panel shown in FIG. 2 after the pair of boxes;
  • FIG. 4 is a schematic structural diagram of an OLED display panel according to another embodiment of the present invention.
  • FIG. 5 is a schematic structural view of the OLED display panel shown in FIG.
  • FIG. 6 is a schematic structural diagram of an OLED display panel according to still another embodiment of the present invention.
  • the array substrate includes a thin film transistor device layer (not shown in FIG. 1) formed on the first substrate 101, an anode 103, a pixel defining layer 104, a light emitting layer 105, and a cathode 106; and the color filter substrate is formed on the second substrate 107.
  • the pixel defining layer 104 corresponds to the position of the black matrix 108.
  • the luminescent layer 105 When the OLED display panel is in operation, by applying a voltage between the anode 103 and the cathode 106, the luminescent layer 105 is excited to emit light, and the light (as indicated by a hollow arrow in FIG. 1) is from the transparent cathode 106 and the top color filter substrate. Through, the top emission is achieved.
  • the OLED display panel comprises a plurality of pixel arrays composed of pixels shown in FIG. 1.
  • the anodes 103 of each pixel are separated by a pixel defining layer 104 to be electrically insulated from each other, and the anode of each pixel obtains an electrical signal through a thin film transistor connected thereto.
  • the luminescent layer 105 and the cathode 106 cover the entire pixel array, and the cathode is powered by a power source located on one side of the pixel array.
  • a small resistance can be set on the flat layer of the color filter substrate.
  • the auxiliary electrode 111 is used to reduce the resistance of the cathode 106, as shown in FIG.
  • a spacer 112 is formed on the auxiliary electrode 111 for preventing damage to the surface of the substrate due to hard contact between the two substrates when the color filter substrate and the array substrate are opposed to each other.
  • the surface of the color filter substrate is further covered with a transparent conductive layer 113 for realizing electrical connection between the auxiliary electrode 111 and the cathode 106 after the color film substrate and the array substrate are paired.
  • the inventors have found that when the OLED display panel shown in FIG. 1 is manufactured, since the spacer 112 formed on the auxiliary electrode 111 has an elongated tapered structure, the area of the tip is small, so when the color filter substrate and the array When the substrate is facing the box, the transparent conductive layer covered by the top of the spacer contacts the array substrate. Since the top surface area of the spacer is small, the area of the contact portion is significantly smaller than the area of the auxiliary electrode facing the surface of the array substrate, and a large pressure is applied to the spacer.
  • the pressure applied to the top end of the spacer 112 is large, and the transparent conductive layer 113 located at the top end of the spacer 112 is subjected to a large pressure and is easily broken, thereby easily causing an open circuit between the cathode and the auxiliary electrode.
  • the OLED display panel includes an array substrate 21 and a color filter substrate 22.
  • the array substrate 21 is covered with a cathode 211, and the auxiliary film 221 is formed on the color filter substrate 22.
  • the OLED display panel further includes a contact structure disposed between the color filter substrate 22 and the array substrate 21, the contact structure electrically connecting the cathode 211 and the auxiliary electrode 221, and an area of the contact portion of the contact structure with the array substrate 21 is larger than the auxiliary electrode 221 The area of the portion in contact with the contact structure.
  • the contact structure can electrically connect the auxiliary electrode and the cathode, and an area of the contact portion of the contact structure and the array substrate is larger than an area where the auxiliary electrode contacts the contact structure, so that the contact structure
  • the contact area with the cathode covered by the surface of the array substrate has an increased contact area.
  • the contact structure may include a spacer 23 and a transparent conductive film 24 formed on the color filter substrate 22, and the spacer 23 is formed on the auxiliary electrode 221, and is transparent.
  • the conductive film 24 covers the surface of the color filter substrate 22 and covers at least the surface of the spacer 23 and the auxiliary electrode 221 which is not blocked by the spacer 23.
  • the pixel defining layer 212 of the array substrate 21 has a recess D at a position corresponding to the spacer 23; the cathode 211 also covers the surface inside the recess D.
  • the structure of the front array substrate 21, the color filter substrate 22 and the contact structure is shown in FIG. 2, so that the surface of FIG. 2 covers the spacer 23 of the transparent conductive film 24.
  • the recess D in which the surface is covered with the cathode 211 is not inserted.
  • the structure of the OLED display panel described in this embodiment is a structure behind the box, as shown in FIG.
  • the contact portion of the transparent conductive film 24 and the cathode 211 in the depressed portion D is the contact portion of the above-described contact structure with the array substrate. Since the contact portion includes not only the surface of the transparent conductive layer 24 covered by the top of the spacer 23 but also the surface of the transparent conductive layer 24 covered by the side wall of the spacer 23, the area of the contact portion is significantly increased, which is larger than the auxiliary electrode 221 and The area of the contact portion 23 of the spacer 23 (i.e., the portion of the auxiliary electrode that is in contact with the contact structure). When the spacer 23 is stressed, the pressure applied to the transparent conductive layer 24 is greatly reduced, thereby reducing the risk of breakage between the auxiliary electrode 221 and the cathode 211 caused by the breakage of the transparent conductive layer 24.
  • the surface shape of the depressed portion D after the surface covers the cathode 211 is matched, for example, to the surface shape of the spacer 23 after the surface accommodated therein covers the transparent conductive film 24.
  • the transparent conductive film 24 is brought into close contact with the cathode without gaps, preventing an increase in contact resistance.
  • the conductive paste 25 may be filled between the spacer 23 after the surface of the recessed portion D is covered with the transparent conductive film 24 and the cathode 211 of the recessed portion D. Therefore, when there is a gap between the transparent conductive film 24 and the cathode 211 which is not in close contact, the gap is filled with the conductive paste 25 to prevent an increase in contact resistance.
  • the contact structure may include a spacer 23 formed on the flat layer 222 of the color filter substrate 22, and the auxiliary electrode 221 is located at the top end of the spacer 23;
  • the pixel defining layer 212 of the substrate 21 has a recess D at a position corresponding to the spacer 23; the cathode 211 also covers the surface inside the recess D.
  • the specific structure of the front array substrate 21, the color filter substrate 22 and the contact structure is shown in FIG. 4, so that the spacer of the auxiliary electrode 221 is formed at the end portion in FIG.
  • the object 23 is not inserted into the recess D whose surface is covered with the cathode 211.
  • the structure of the OLED display panel described in this embodiment is a structure behind the box, as shown in FIG.
  • the contact portion of the spacer 23 and the cathode 211 in the recess D is the above-mentioned contact structure The portion in contact with the array substrate. Since the contact portion includes a portion of the side wall surface of the spacer 23, the area of the contact portion is significantly increased larger than the area of the contact portion of the auxiliary electrode 221 with the spacer 23 (i.e., the portion where the auxiliary electrode is in contact with the contact structure).
  • the spacer 23 and the cathode 211 in the recess D are There is no need to provide a transparent conductive layer, so that when the spacer 23 is stressed, there is no problem that the transparent conductive layer is broken, thereby avoiding the disconnection between the auxiliary electrode 221 and the cathode 211 caused by excessive pressure on the cartridge. problem.
  • the surface shape of the depressed portion D after the surface covers the cathode 211 is matched, for example, to the surface shape of the spacer 23 in which the auxiliary electrode 221 is formed at the end portion accommodated therein.
  • the auxiliary electrode 221 and the spacer 23 are brought into close contact with the cathode 211 without a gap, and an increase in contact resistance between the auxiliary electrode 221 and the cathode 211 is prevented.
  • the spacer 23 in which the auxiliary electrode 221 is formed at the end portion of the recess portion D is accommodated, and the conductive paste 25 may be filled between the cathode 211 in the recess portion D. Therefore, when there is a gap between the auxiliary electrode 221 and the cathode 211 which cannot be in close contact, the gap is filled with the conductive paste 25 to prevent an increase in contact resistance.
  • the gap between the array substrate 21 and the color filter substrate 22 is filled with a transparent conductive paste 25, and the transparent conductive paste 25 is filled at least at the auxiliary electrode 221 and the cathode 211. Between to form a contact structure.
  • the area of the contact structure formed by the transparent conductive paste 25 and the array substrate 21 is equal to the contact structure formed by the transparent conductive paste 25 and the auxiliary electrode 221 The area of the contact part.
  • the transparent conductive paste 25 is filled in the entire gap between the array substrate 21 and the color filter substrate 22, the area of the contact portion formed by the transparent conductive paste 25 and the array substrate 21 is larger than that formed by the transparent conductive paste 25. The area of the contact portion of the contact structure with the auxiliary electrode 221.
  • the auxiliary electrode 221 on the color filter substrate 22 can be electrically contacted with the cathode 211 through the transparent conductive paste 25, it is not necessary to provide a transparent conductive layer between the auxiliary electrode 221 and the cathode 211.
  • the transparent conductive adhesive 25 has a strong deformability, even when the transparent conductive adhesive 25 is subjected to a large pressure, the transparent conductive adhesive 25 does not undergo being crushed, thereby avoiding the assistance caused by excessive pressure on the cartridge. The problem of disconnection between the electrode 221 and the cathode 211.
  • At least one embodiment of the present invention also provides an OLED display device including the OLED display panel described in any of the embodiments of the present invention. Since the probability of an open circuit between the auxiliary electrode and the cathode in the OLED display panel is significantly reduced, the OLED display device can have significantly improved display performance.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种OLED显示面板及OLED显示装置，该OLED显示面板包括阵列基板(21)及彩膜基板(22)，阵列基板(21)上覆盖有阴极(211)，彩膜基板(22)上形成有辅助电极(221)。接触结构设置于彩膜基板(22)与阵列基板(21)之间，接触结构使阴极(211)和辅助电极(221)电连接，且接触结构与阵列基板(21)接触部分的面积大于或等于辅助电极(221)与接触结构接触部分的面积。该OLED显示面板避免了在顶发射型OLED显示面板对盒时，由于压力过大容易导致辅助电极与阴极之间断路。

Description

OLED显示面板及应用其的OLED显示装置 技术领域
本发明的实施例涉及OLED显示面板及应用其的OLED显示装置。
背景技术
在平板显示面板中，有机发光二极管(Organic Light Emitting Display，OLED)显示面板具有自发光、反应快、视角广、亮度高、色彩艳、轻薄等优点，受到人们的广泛重视。
OLED的结构通常包括阳极层、阴极层以及设置在阳极层和阴极层之间的发光层。OLED的发光机理为：当电压施加于阳极层和阴极层之间时，在外界电压的驱动下，由阳极层一侧注入的空穴克服界面势垒并被传输到发光层中，由阴极层一侧注入的电子克服界面势垒并被传输到发光层中，到达发光层中的空穴和电子在发光层中复合形成激子，激子辐射跃迁发光而产生发光现象，即电致发光。根据发光面的不同，OLED显示面板可以分为顶发射和底发射两种；OLED显示面板包括像素阵列。
为了增大光的透过率，阴极需要采用较薄的透明导电材料，但较薄的透明阴极方阻很大，电流流过阴极时会产生较大的压降，因此，距离电源供给点越远的像素上获得的阴极电压越小，导致该像素的显示亮度相比于距离电源供给点较近的像素的显示亮度低，从而使得OLED显示装置的亮度均匀性变差。
发明内容
本发明至少一实施例提供一种OLED显示面板及应用其的OLED显示装置，可避免顶发射型OLED显示面板中由于对盒时压力过大容易导致的辅助电极与阴极之间的断路。
本发明至少一实施例提供一种OLED显示面板，包括：阵列基板，所述阵列基板上覆盖有阴极；彩膜基板，所述彩膜基板上形成有辅助电极；设置于所述彩膜基板与所述阵列基板之间的接触结构。所述接触结构使所述阴极 和所述辅助电极电连接，且所述接触结构与所述阵列基板接触部分的面积大于或等于所述辅助电极与所述接触结构接触部分的面积。
例如，在一个实施例中，所述接触结构包括形成在所述彩膜基板上的隔垫物和透明导电薄膜，所述隔垫物形成在所述辅助电极上，所述透明导电薄膜覆盖所述彩膜基板的表面，且至少覆盖所述隔垫物表面及未被所述隔垫物遮挡的所述辅助电极；所述阵列基板的像素界定层中对应所述隔垫物的位置具有凹陷部；所述阴极还覆盖在所述凹陷部的表面上；所述彩膜基板的表面覆盖所述透明导电薄膜的隔垫物插入所述阵列基板的表面覆盖有所述阴极的所述凹陷部中。
例如，在一个实施例中，表面覆盖所述阴极后的所述凹陷部的表面形状，与容纳在其中的表面覆盖所述透明导电薄膜后的所述隔垫物的表面形状匹配。
例如，容纳在所述凹陷部中的表面覆盖所述透明导电薄膜后的所述隔垫物与所述凹陷部中的阴极之间填充有导电胶。
例如，在一个实施例中，所述接触结构包括形成在所述彩膜基板的平坦层上的隔垫物，所述辅助电极位于所述隔垫物的顶端；所述阵列基板的像素界定层上对应所述隔垫物的位置具有凹陷部；所述阴极还覆盖在所述凹陷部表面；所述彩膜基板的端部形成有所述辅助电极的隔垫物插入表面所述阵列基板的覆盖有所述阴极的所述凹陷部中。
例如，所述阵列基板的表面覆盖所述阴极后的所述凹陷部的表面形状，与容纳在其中的所述彩膜基板的端部形成有所述辅助电极的所述隔垫物的表面形状匹配。
例如，容纳在所述凹陷部中端部形成有所述辅助电极的所述隔垫物，与所述凹陷部中的阴极之间填充有导电胶。
例如，在一个实施例中，所述阵列基板与所述彩膜基板之间的空隙中填充有透明导电胶，所述透明导电胶至少填充在所述辅助电极与所述阴极之间，以形成所述接触结构。
本发明至少一实施例提供一种OLED显示装置，其中，包括上述的OLED显示面板。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例的附图作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施例，而非对本发明的限制。
图1为一种OLED显示面板的结构示意图；
图2为本发明一实施例提供的OLED显示面板的结构示意图；
图3为图2所示的OLED显示面板对盒后的结构示意图；
图4为本发明另一实施例提供的OLED显示面板的结构示意图；
图5为图4所示的OLED显示面板对盒后的结构示意图；
图6为本发明再一实施例提供的OLED显示面板的结构示意图。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
图1示出了一种顶发射型OLED显示面板中一个像素的结构，包括阵列基板和彩膜基板。阵列基板包括形成在第一基板101上的薄膜晶体管器件层(图1中未示出)、阳极103、像素界定层104、发光层105和阴极106；彩膜基板包括形成在第二基板上107的黑矩阵108、彩色滤光片109和平坦层110。像素界定层104与黑矩阵108位置对应。该OLED显示面板工作时，通过在阳极103和阴极106之间施加电压，使发光层105受激发而发光，光线(如图1中空心箭头所示)从透明的阴极106及顶部的彩膜基板穿过，实现了顶发射。
OLED显示面板包含有多个图1所示像素组成的像素阵列，各像素的阳极103通过像素界定层104分隔开，实现相互电绝缘，每个像素的阳极通过与其连接的薄膜晶体管获得电信号。发光层105和阴极106覆盖整个像素阵列，由位于像素阵列一侧的电源为阴极供电。
为解决亮度均一性变差的问题，可在彩膜基板的平坦层上设置电阻较小 的辅助电极111以降低阴极106电阻的方案，如图1所示。辅助电极111上形成有隔垫物112，用于防止在彩膜基板与阵列基板对盒时，两基板之间由于硬接触而导致基板表面损伤。彩膜基板表面还覆盖透明导电层113，用于在彩膜基板与阵列基板对盒后，实现辅助电极111与阴极106之间的电连接。
发明人发现：在制造图1所示的OLED显示面板时，由于形成在辅助电极111上的隔垫物112具有细长的锥形结构，所以顶端的面积较小，因此当彩膜基板与阵列基板对盒时，隔垫物顶端覆盖的透明导电层与阵列基板接触，由于隔垫物顶端面积小，接触部分的面积明显小于辅助电极朝向阵列基板表面的面积，较大的压力施加在隔垫物112上，使得隔垫物112的顶端所受的压强较大，位于隔垫物112顶端的透明导电层113受到较大的压强而容易断裂，从而容易导致阴极与辅助电极之间断路。
本发明至少一实施例提供了一种OLED显示面板。如图2所示，OLED显示面板包括阵列基板21及彩膜基板22，阵列基板21上覆盖有阴极211，彩膜基板22上形成有辅助电极221。该OLED显示面板还包括设置于彩膜基板22与阵列基板21之间的接触结构，该接触结构使阴极211和辅助电极221电连接，且接触结构与阵列基板21接触部分的面积大于辅助电极221与接触结构接触部分的面积。
本发明至少一实施例提供的OLED显示面板中，由于该接触结构能使辅助电极与阴极电连接，且该接触结构与阵列基板接触部分的面积大于辅助电极与接触结构接触的面积，使得接触结构与阵列基板表面覆盖的阴极之间具有增大的接触面积，当彩膜基板与阵列基板对盒时，即使接触结构受到较大压力，其接触部分所受的压强也较小，可大大降低因对盒时压力大而使辅助电极与阴极之间断路的风险。
上述实施例提供的OLED显示面板中，接触结构可以如图2所示，包括形成在彩膜基板22上的隔垫物23和透明导电薄膜24，隔垫物23形成在辅助电极221上，透明导电薄膜24覆盖彩膜基板22的表面，且至少覆盖隔垫物23表面及未被隔垫物23遮挡的辅助电极221。阵列基板21的像素界定层212上对应隔垫物23的位置具有凹陷部D；阴极211还覆盖在凹陷部D内的表面上。在将阵列基板和彩膜基板相对设置后，表面覆盖透明导电薄膜24的隔垫物23插入表面覆盖有阴极211的凹陷部D中。
需要说明的是：为了使接触结构更清楚，图2中示出了对盒前阵列基板21、彩膜基板22及接触结构的结构，因此图2中表面覆盖透明导电薄膜24的隔垫物23并未插入表面覆盖有阴极211的凹陷部D中。而本实施例描述的OLED显示面板的结构是对盒后的结构，如图3所示。
在凹陷部D内的透明导电薄膜24与阴极211的接触部分即为上述的接触结构与阵列基板的接触部分。由于该接触部分不仅包括隔垫物23顶端覆盖的透明导电层24表面，还包括隔垫物23部分侧壁覆盖的透明导电层24表面，使得接触部分的面积显著增大，大于辅助电极221与隔垫物23接触部分(即辅助电极与接触结构接触的部分)的面积。当隔垫物23受力时，施加在透明导电层24上的压强就会大大减小，从而降低了透明导电层24断裂引起的辅助电极221与阴极211之间断路的风险。
图3所示的OLED显示面板中，表面覆盖阴极211后的凹陷部D的表面形状，例如与容纳在其中的表面覆盖透明导电薄膜24后的隔垫物23的表面形状匹配。使得透明导电薄膜24与阴极紧密接触无间隙，防止接触电阻的增加。
另外，图2所示的OLED显示面板中，容纳在凹陷部D中的表面覆盖透明导电薄膜24后的隔垫物23与凹陷部D中的阴极211之间可以填充导电胶25。因此，在透明导电薄膜24与阴极211之间存在间隙不能紧密接触的时候，用导电胶25来填充这些间隙，防止接触电阻的增加。
在本发明的另一种实施例中，接触结构可以如图4所示，包括形成在彩膜基板22的平坦层222上的隔垫物23，辅助电极221位于隔垫物23的顶端；阵列基板21的像素界定层212上对应隔垫物23的位置具有凹陷部D；阴极211还覆盖在凹陷部D内的表面上。当将阵列基板和彩膜基板相对设置后，端部形成有辅助电极221的隔垫物23插入表面覆盖有阴极211的凹陷部D中。
需要说明的是：为了使接触结构更清楚，图4中示出了对盒前阵列基板21、彩膜基板22及接触结构的具体结构，因此图4中端部形成有辅助电极221的隔垫物23并未插入表面覆盖有阴极211的凹陷部D中。本实施例描述的OLED显示面板的结构是对盒后的结构，如图5所示。
在凹陷部D内的隔垫物23与阴极211的接触部分即为上述的接触结构 与阵列基板的接触部分。由于该接触部分包括隔垫物23部分侧壁表面，使得接触部分的面积显著增大，大于辅助电极221与隔垫物23接触部分(即辅助电极与接触结构接触的部分)的面积。
在图4和图5所示的实施方式中，由于位于隔垫物23顶端的辅助电极221可以直接与凹陷部D内的阴极电接触，在凹陷部D内的隔垫物23与阴极211之间就没有必要设置透明导电层，使得隔垫物23受力时，不存在透明导电层被压断的问题，从而避免了对盒时压力过大引起的辅助电极221与阴极211之间断路的问题。
图5所示的OLED显示面板中，表面覆盖阴极211后的凹陷部D的表面形状，例如与容纳在其中的端部形成有辅助电极221的隔垫物23的表面形状匹配。使得辅助电极221及隔垫物23与阴极211紧密接触无间隙，防止辅助电极221与阴极211之间的接触电阻的增加。
另外，图4所示的OLED显示面板中，容纳在凹陷部D中端部形成有辅助电极221的隔垫物23，与凹陷部D中的阴极211之间可以填充有导电胶25。因此，在辅助电极221与阴极211之间存在间隙不能紧密接触的时候，用导电胶25来填充这些间隙，防止接触电阻的增加。
在本发明的再一个实施例中，如图6所示，阵列基板21与彩膜基板22之间的空隙中填充有透明导电胶25，该透明导电胶25至少填充在辅助电极221与阴极211之间，以形成接触结构。
当透明导电胶25仅填充在辅助电极221与阴极211之间时，由透明导电胶25形成的接触结构与阵列基板21接触部分的面积，等于由透明导电胶25形成的接触结构与辅助电极221接触部分的面积。而当透明导电胶25填充在阵列基板21与彩膜基板22之间的整个空隙中时，由透明导电胶25形成的接触结构与阵列基板21接触部分的面积，大于由透明导电胶25形成的接触结构与辅助电极221接触部分的面积。
在图6所示的实施方式中，由于位于彩膜基板22上的辅助电极221可以通过透明导电胶25与阴极211电接触，在辅助电极221与阴极211之间就没有必要设置透明导电层。又由于透明导电胶25具有较强的形变能力，使得对盒时，即使透明导电胶25受到较大的压力也不会发生被压断的情况，从而避免了对盒时压力过大导致的辅助电极221与阴极211之间断路的问题。
本发明至少一实施例还提供了一种OLED显示装置，其中包括本发明任一实施例描述的OLED显示面板。由于该OLED显示面板中辅助电极与阴极之间断路的几率显著降低，因此该OLED显示装置可具有显著提升的显示性能。
以上所述仅是本发明的示范性实施方式，而非用于限制本发明的保护范围，本发明的保护范围由所附的权利要求确定。
本申请要求于2014年5月09日递交的中国专利申请第201410194343.6号的优先权，在此全文引用上述中国专利申请公开的内容以作为本申请的一部分。

Claims (11)

  1. 一种OLED显示面板，包括：
    阵列基板，所述阵列基板上覆盖有阴极，
    彩膜基板，所述彩膜基板上形成有辅助电极，
    设置于所述彩膜基板与所述阵列基板之间的接触结构，
    其中，所述接触结构配置来所述阴极和所述辅助电极电连接，且所述接触结构与所述阵列基板接触部分的面积大于或等于所述辅助电极与所述接触结构接触部分的面积。
  2. 根据权利要求1所述的OLED显示面板，其中，所述接触结构包括形成在所述彩膜基板上的隔垫物和透明导电薄膜，所述隔垫物形成在所述辅助电极上，所述透明导电薄膜覆盖所述彩膜基板的表面且至少覆盖所述隔垫物表面及未被所述隔垫物遮挡的所述辅助电极。
  3. 根据权利要求2所述的OLED显示面板，其中，所述阵列基板的像素界定层中对应所述隔垫物的位置具有凹陷部；
    所述阴极还覆盖在所述凹陷部内的表面上；
    所述彩膜基板的表面覆盖所述透明导电薄膜的隔垫物插入到所述阵列基板的表面覆盖有所述阴极的所述凹陷部中。
  4. 根据权利要求3所述的OLED显示面板，其中，所述阵列基板的表面覆盖所述阴极后的凹陷部的表面形状，与容纳在其中的所述彩膜基板的表面覆盖所述透明导电薄膜后的隔垫物的表面形状匹配。
  5. 根据权利要求3或4所述的OLED显示面板，其中，容纳在所述凹陷部中的表面覆盖所述透明导电薄膜后的所述隔垫物与所述凹陷部中的阴极之间填充有导电胶。
  6. 根据权利要求1所述的OLED显示面板，其中，所述接触结构包括形成在所述彩膜基板的平坦层上的隔垫物，所述辅助电极位于所述隔垫物的顶端。
  7. 根据权利要求6所述的OLED显示面板，其中，所述阵列基板的像素界定层上对应所述隔垫物的位置具有凹陷部；
    所述阴极还覆盖在所述凹陷部表面；
    所述彩膜基板的端部形成有所述辅助电极的隔垫物插入到所述阵列基板的表面覆盖有所述阴极的所述凹陷部中。
  8. 根据权利要求7所述的OLED显示面板，其中，所述阵列基板的表面覆盖所述阴极后的凹陷部的表面形状，与容纳在其中的所述彩膜基板的端部形成有所述辅助电极的隔垫物的表面形状匹配。
  9. 根据权利要求7或8所述的OLED显示面板，其中，容纳在所述凹陷部中端部形成有所述辅助电极的所述隔垫物，与所述凹陷部中的阴极之间填充有导电胶。
  10. 根据权利要求1所述的OLED显示面板，其中，所述阵列基板与所述彩膜基板之间的空隙中填充有透明导电胶，所述透明导电胶至少填充在所述辅助电极与所述阴极之间，以形成所述接触结构。
  11. 一种OLED显示装置，包括权利要求1-10任一项所述的OLED显示面板。
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