WO2020124781A1 - Oled显示面板 - Google Patents
Oled显示面板 Download PDFInfo
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- WO2020124781A1 WO2020124781A1 PCT/CN2019/075684 CN2019075684W WO2020124781A1 WO 2020124781 A1 WO2020124781 A1 WO 2020124781A1 CN 2019075684 W CN2019075684 W CN 2019075684W WO 2020124781 A1 WO2020124781 A1 WO 2020124781A1
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- hole
- display panel
- retaining wall
- trench
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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
Definitions
- the invention relates to the field of display technology, in particular to an OLED display panel.
- OLED Organic Light-emitting diode
- TFE thin Transmission Vapor film encapsulation
- WVTR water Permeance
- the invention provides an OLED display panel, which is provided with a water blocking structure at the cutting position, which can protect the light emitting device of the cutting position from water, thereby preventing water vapor from invading the OLED panel from the cutting position and causing damage to the light emitting device, thereby affecting display quality problem.
- the present invention provides an OLED display panel, including a substrate, an OLED light emitting layer provided on the surface of the substrate, and a thin film encapsulation layer provided on the surface of the OLED light emitting layer;
- the display area of the OLED display panel is formed with a through hole and a water blocking structure for preventing the through hole from invading water vapor;
- the water blocking structure includes:
- a retaining wall is formed in the groove and protrudes from the surface of the OLED light emitting layer; the profile shape of the retaining wall is the same as the hole shape of the through hole, and the through hole is located in the profile of the retaining wall center;
- the thin-film encapsulation layer includes a stacked water blocking layer and a stress buffer layer.
- the opening edge of the water blocking layer is flush with the edge of the through hole, and the stress buffer layer is formed outside the retaining wall.
- the inner wall of the groove is inclined or curved toward the center of the groove.
- the water blocking structure includes a first sub-trench and a second sub-trench, the first sub-trench is disposed around the through hole, and the second sub-trench surrounds the The first sub-trench setting;
- a first sub-retaining wall is provided in the first sub-trench, and a second sub-retaining wall is provided in the second sub-trench.
- the height of the first sub-retaining wall is greater than the height of the second sub-retaining wall.
- the stress buffer layer is formed outside the second sub-retaining wall.
- the stress buffer layer is formed outside the first sub-retaining wall and covers the second sub-retaining wall.
- the retaining wall adopts a curable liquid hygroscopic agent or an organic material doped with hygroscopic particles.
- the surface of the base is further provided with a crack stopper, the crack stopper is disposed around the through hole and is located between the retaining wall and the through hole.
- the hole shape of the through hole is a regular planar shape or a special planar shape.
- the through hole is located near the edge of the OLED panel, or the through hole is integrally formed with the edge of the OLED panel.
- the present invention also provides another OLED display panel, including a substrate, an OLED light emitting layer disposed on the surface of the substrate, and a thin film encapsulation layer disposed on the surface of the OLED light emitting layer;
- the display area of the OLED display panel is formed with a through hole and a water blocking structure for preventing the through hole from invading water vapor;
- the water blocking structure includes:
- a retaining wall is formed in the groove and protrudes from the surface of the OLED light emitting layer
- the thin-film encapsulation layer includes a stacked water blocking layer and a stress buffer layer.
- the opening edge of the water blocking layer is flush with the edge of the through hole.
- the stress buffer layer is formed outside the retaining wall.
- the inner wall of the groove is inclined or curved toward the center of the groove.
- the water blocking structure includes a first sub-trench and a second sub-trench, the first sub-trench is disposed around the through hole, and the second sub-trench surrounds the The first sub-trench setting;
- a first sub-retaining wall is provided in the first sub-trench, and a second sub-retaining wall is provided in the second sub-trench.
- the height of the first sub-retaining wall is greater than the height of the second sub-retaining wall.
- the stress buffer layer is formed outside the second sub-retaining wall.
- the stress buffer layer is formed outside the first sub-retaining wall and covers the second sub-retaining wall.
- the retaining wall adopts a curable liquid hygroscopic agent or an organic material doped with hygroscopic particles.
- the surface of the base is further provided with a crack stopper, the crack stopper is disposed around the through hole and is located between the retaining wall and the through hole.
- the hole shape of the through hole is a regular planar shape or a special planar shape.
- the through hole is located near the edge of the OLED panel, or the through hole is integrally formed with the edge of the OLED panel.
- the invention is provided with a water blocking wall at the cutting position of the OLED display panel to isolate the light emitting device at the cutting position from the water vapor of the light emitting device in the display area, thereby protecting the light emitting device in the panel from water vapor Corrosion, thereby prolonging the display life of the OLED display panel; solves the existing in-screen special-shaped cutting technology.
- a water blocking wall at the cutting position of the OLED display panel to isolate the light emitting device at the cutting position from the water vapor of the light emitting device in the display area, thereby protecting the light emitting device in the panel from water vapor Corrosion, thereby prolonging the display life of the OLED display panel; solves the existing in-screen special-shaped cutting technology.
- 1a is a schematic view of the front view of the OLED display panel provided by the present invention.
- FIG. 1b is an enlarged view at A of FIG. 1a;
- FIG. 1c is a schematic front view structure diagram of another OLED display panel provided by the present invention.
- Fig. 1d is an enlarged view at A'of Fig. 1c.
- 3a is a schematic cross-sectional structure diagram of an OLED display panel provided by the present invention.
- FIG. 3b is a schematic cross-sectional structure diagram of another OLED display panel provided by the present invention.
- the present invention is directed to the existing in-screen special-shaped cutting technology. After the OLED display panel is cut, there is no encapsulation layer protection at the cutting position, thereby exposing the light-emitting device, and water vapor invades the OLED display panel from the cutting position to cause damage to the light-emitting device, thereby affecting the entire panel.
- This embodiment can solve this defect.
- an OLED display panel 101 provided by an embodiment of the present invention
- the display area 102 of the OLED display panel 101 is provided with a through hole 103 for placing a front camera of a mobile phone, and a hole of the through hole 103
- the shape may be a circle, and the through hole 103 is located near the edge of the OLED panel; at least one groove (not shown in the figure) is provided in the film layer of the OLED display panel 101, which is provided in the groove
- the retaining wall 104 is disposed around the through hole 103, and the vertical distance between any position of the retaining wall 104 and the edge of the through hole 103 is equal, that is, the outline shape of the retaining wall 104 and the through hole
- the hole shape of 103 is the same, and the through hole 103 is located at the center of the outline of the retaining wall 104.
- the OLED display panel 101 includes a substrate 105, an OLED light emitting layer provided on the surface of the substrate 105, and a thin film encapsulation layer provided on the surface of the OLED light emitting layer; the through hole 103 penetrates the substrate 105 and the OLED A light-emitting layer and the thin-film encapsulation layer; the thin-film encapsulation layer at least includes a first water blocking layer, a stress buffer layer and a second water blocking layer that are stacked.
- the OLED display panel 101 further includes a water blocking structure including a trench and a retaining wall 104; the trench is formed on the surface of the substrate 105, and the retaining wall 104 is formed within the trench, And higher than the OLED light emitting layer on the surface of the substrate 105.
- a water blocking structure including a trench and a retaining wall 104; the trench is formed on the surface of the substrate 105, and the retaining wall 104 is formed within the trench, And higher than the OLED light emitting layer on the surface of the substrate 105.
- the hole shape of the through hole 103 in the OLED display panel 101 may also be a drop shape.
- the through hole 103 is integrally formed with the edge of the OLED panel.
- the through hole 103 When the through hole 103 is in the shape of a drop, and the through hole 103 is integrally formed with the edge of the OLED panel, the outline of the groove is non-closed, and the groove is provided along the edge of the through hole 103 And the end of the groove extends to the edge of the display panel, and a blocking wall 104 is formed in the groove.
- the OLED display panel includes a substrate 201, a surface of which defines a display area 2011, a water blocking area 2012 located in the display area 2011, and a pre-cut area located in the water blocking area 2012 2013; a trench 202 is formed in the water blocking area 2012.
- the inner wall of the groove 202 is inclined or curved toward the center of the groove 202, so that the width of the mouth of the groove 202 is smaller than the inner width, so as to tighten the water blocking material inside the groove 202 and avoid falling off.
- the cross-sectional shape of the groove 202 is a notch circle
- the notch circle is an unclosed arc
- any end point of the notch circle is the surface of the base 201 and
- the intersection between the notched circular tangent line and the surface formed by the base 201 and the tangent line is less than 90 degrees.
- the cross-sectional shape of the groove 202 is a trapezoid with a top, and the angle formed between the waist of the trapezoid and the surface of the connected base 201 is less than 90 degrees.
- the water blocking area 2012 on the surface of the substrate 201 is further provided with a crack stopper 203, which is arranged around the pre-cutting area 2013, and the crack stopper 203 is located in the groove 202 and the pre-cutting Between the regions 2013; the crack stopper 203 is used to limit the cracks generated by opening the through hole 204 within its enclosing range.
- the OLED display panel includes a substrate 201, a surface of which defines a display area 2011, a water blocking area 2012 located in the display area 2011, and a pre-positioning located in the water blocking area 2012 Cutting area 2013; trench 202 is formed in the water blocking area 2012.
- An OLED light-emitting layer 205 is prepared on the surface of the substrate 201, and the OLED light-emitting material located at the groove 202 will have a fault, and then deposited on the bottom of the groove 202, so that the OLED light-emitting material at the edge of the pre-cut area 2013 and the display area
- the OLED luminescent material of 2011 is blocked to prevent water vapor from propagating from the edge of the through hole 204 into the display area 2011; meanwhile, the OLED luminescent material located at the crack stopper 203 is deposited on the surface of the crack stopper 203, A fault is formed with the OLED luminescent material in the display area 2011 to block the OLED luminescent material at the edge of the pre-cut area 2013 and the OLED luminescent material in the display area 2011 to prevent opening of the through hole 204 Of the crack extends into the display area 2011, causing damage to the light emitting device in the display area 2011.
- the groove 202 is filled with a water-blocking material using inkjet printing technology or electrofluidic printing technology, and the water-blocking material may use a curable liquid hygroscopic agent or doped hygroscopic particles (For example: CaO nanoparticles) organic material, the water blocking material fills the trench 202 and is higher than the surface of the OLED light emitting layer 205, and forms the retaining wall 206 after curing.
- a water-blocking material using inkjet printing technology or electrofluidic printing technology
- the water-blocking material may use a curable liquid hygroscopic agent or doped hygroscopic particles (For example: CaO nanoparticles) organic material
- the water blocking material fills the trench 202 and is higher than the surface of the OLED light emitting layer 205, and forms the retaining wall 206 after curing.
- the OLED display panel includes a substrate 201, and a surface of the substrate 201 defines a display area 2011, a water blocking area 2012 located in the display area 2011, and a pre-positioning located in the water blocking area 2012 Cutting region 2013; a trench 202 and a crack stopper 203 are formed in the water blocking region 2012, an OLED light emitting layer 205 is formed on the surface of the substrate 201, and the retaining wall 206 is formed in the trench 202.
- a first water blocking layer 207 is provided on the surface of the substrate 201, and the first water blocking layer 207 covers the display area 2011, the water blocking area 2012, and the pre-cutting area 2013.
- the first water blocking layer 207 is a thin film of an inorganic material, and the material of the first water blocking layer 207 is one or more combined materials of Al 2 O 3 , TiO 2 , SiNx, SiCNx, and SiOx.
- the OLED display panel includes a substrate 201, and a surface of the substrate 201 defines a display area 2011, a water blocking area 2012 located in the display area 2011, and a pre-positioning located in the water blocking area 2012 Cutting area 2013; a groove 202 and a crack stopper 203 are formed in the water blocking area 2012, an OLED light emitting layer 205 is formed on the surface of the substrate 201, and the retaining wall 206 is formed in the groove 202; A first water blocking layer 207 is provided on the surface of the substrate 201, and the first water blocking layer 207 covers the display area 2011, the water blocking area 2012, and the pre-cutting area 2013.
- a stress buffer layer 208 is prepared on the surface of the first water blocking layer 207, and the stress buffer layer 208 is formed in a region outside the retaining wall 206; the stress buffer layer 208 is an organic material layer used to buffer the OLED panel The stress during bending or folding reduces the damage caused by excessive stress to the OLED light-emitting layer 205; the material of the stress buffer layer 208 is acrylic, hexamethyldimethicone, polyacrylate, polycarbonate, One or more combinations of polystyrene.
- the OLED display panel includes a substrate 201, and a surface of the substrate 201 defines a display area 2011, a water blocking area 2012 located in the display area 2011, and a pre-positioning located in the water blocking area 2012 Cutting area 2013; a groove 202 and a crack stopper 203 are formed in the water blocking area 2012, an OLED light emitting layer 205 is formed on the surface of the substrate 201, and the retaining wall 206 is formed in the groove 202;
- the surface of the substrate 201 is provided with a first water blocking layer 207 covering the display area 2011, the water blocking area 2012 and the pre-cutting area 2013; the surface of the first water blocking layer 207
- the stress buffer layer 208 is prepared.
- a second water blocking layer 209 is formed on the surface of the substrate 201, the second water blocking layer 209 covers the display area 2011, the water blocking area 2012, and the pre-cutting area 2013, and the second water blocking layer
- the material used by 209 is the same as the material used by the first water blocking layer 207, and will not be repeated here.
- the OLED display panel includes a substrate 201, and a surface of the substrate 201 defines a display area 2011, a water blocking area 2012 located in the display area 2011, and a pre-positioning located in the water blocking area 2012 Cutting area 2013; a groove 202 and a crack stopper 203 are formed in the water blocking area 2012, an OLED light emitting layer 205 is formed on the surface of the substrate 201, and the retaining wall 206 is formed in the groove 202;
- the surface of the substrate 201 is provided with a first water blocking layer 207 covering the display area 2011, the water blocking area 2012 and the pre-cutting area 2013; the surface of the first water blocking layer 207 A stress buffer layer 208 and a second water blocking layer 209 are prepared.
- the laser cutting technique is used to remove the pre-cut region 2013 to form the through hole 204, and the opening edges of the first water blocking layer 207 and the second water blocking layer 209 are flush with the edge of the through hole 204,
- the stress buffer layer 208 is formed outside the retaining wall 206.
- the OLED display panel includes a substrate 301, a trench 302, a crack stopper 303, an OLED light emitting layer 305, a blocking wall 306 formed in the trench 302, and a surface provided on the substrate 301
- a first sub-trench 3021 and a second sub-trench 3021 are formed on the surface of the substrate 301, the first sub-trench 3021 is disposed around the through hole 304, and the second sub-trench 3021 surrounds the A first sub-trench 3021 is provided; a first sub-retaining wall 3061 is provided in the first sub-trench 3021, a second sub-retaining wall 3062 is provided in the second sub-trench 3021; and the first sub-trench The height of the retaining wall 3061 is greater than the height of the second sub-retaining wall 3062; wherein, the stress buffer layer 308 is formed outside the second sub-retaining wall 3062.
- the stress buffer layer 308 is formed outside the first sub-retaining wall 3061, and covers the second sub-retaining wall 3062, so as to increase the coverage area of the thin film encapsulation layer and further improve the device's resistance to moisture Function, thereby increasing the service life of OLED light-emitting devices.
- the beneficial effects of the present invention are: compared with the existing OLED display panel, the present invention is provided with a water blocking wall at the cutting position of the OLED display panel to isolate the light emitting device at the cutting position from the water vapor of the light emitting device in the display area, thereby protecting The light-emitting device in the panel is protected from water vapor, thereby prolonging the display life of the OLED display panel; solving the existing in-screen special-shaped cutting technology, after the OLED display panel is cut, there is no encapsulation layer protection at the cutting position, thereby exposing the light-emitting device and water vapor Intrusion into the OLED display panel from the cut causes damage to the light-emitting device, which in turn affects the display quality of the entire panel.
Abstract
本发明提供一种OLED显示面板，OLED显示面板的显示区形成有通孔、以及用于防止所述通孔侵入水汽的阻水结构；阻水结构至少包括形成于基底表面的沟槽，以及形成于沟槽内的挡墙，挡墙顶部高于OLED发光层。
Description
本发明涉及显示技术领域，尤其涉及一种OLED显示面板。
柔性有机发光二极管(Organic Light-emitting diode，OLED)是一种可变型可弯曲的显示装置，与传统的刚性显示屏相比，具有自发光、广视角、高对比、低耗电、极高反应速率等优点。OLED发光材料是一种对水氧极其敏感的有机材料，通常柔性OLED采用薄膜封装(thin
Transmission Vapor film encapsulation，TFE)技术，封装薄膜一般为无机/有机/无机的多层膜叠加结构，水蒸气渗透性(Water
Permeance，WVTR)可降到约10-6g/m2·day级别，保证了OLED发光材料正常工作。
在制备屏内O型切割(O-cut)显示屏时，需要在屏幕上挖孔，放置摄像头，为保证摄像的清晰度，在放置摄像头的区域需要将电激发光层(Electro
Luminscent，EL) +TFE制程段的膜层挖空，该工艺会导致EL和TFE层的侧面直接暴露在外面，水氧从EL和TFE侧面入侵，严重影响发光器件的使用寿命。
综上所述，现有的屏内异形切割技术中，OLED显示面板切割后，切割处无封装层保护，从而暴露出发光器件，水汽从切割处侵入OLED面板导致发光器件损坏，进而影响整个面板的显示品质。
本发明提供一种OLED显示面板，在切割处设置有阻水结构，能够对切割处的发光器件进行阻水保护，从而避免水汽从切割处侵入OLED面板导致发光器件损坏，进而影响显示品质的技术问题。
为解决上述问题，本发明提供的技术方案如下：
本发明提供一种OLED显示面板，包括基底、设置于所述基底表面的OLED发光层、以及设置于所述OLED发光层表面的薄膜封装层；
所述OLED显示面板的显示区形成有通孔、以及用于防止所述通孔侵入水汽的阻水结构；所述阻水结构包括：
沟槽，形成于所述基底表面，所述沟槽围绕所述通孔设置；以及，
挡墙，形成于所述沟槽内，且突出于所述OLED发光层表面；所述挡墙的轮廓形状与所述通孔的孔形相同，且所述通孔位于所述挡墙的轮廓中心；
所述薄膜封装层包括层叠设置的阻水层和应力缓冲层，所述阻水层的开孔边缘与所述通孔的边缘平齐，所述应力缓冲层形成于所述挡墙之外。
根据本发明一优选实施例，所述沟槽内壁向所述沟槽的中心倾斜或弯曲。
根据本发明一优选实施例，所述阻水结构包括第一子沟槽和第二子沟槽，所述第一子沟槽围绕所述通孔设置，所述第二子沟槽围绕所述第一子沟槽设置；
所述第一子沟槽内设置有第一子挡墙，所述第二子沟槽内设置有第二子挡墙。
根据本发明一优选实施例，所述第一子挡墙的高度大于所述第二子挡墙的高度。
根据本发明一优选实施例，所述应力缓冲层形成于所述第二子挡墙外。
根据本发明一优选实施例，所述应力缓冲层形成于所述第一子挡墙外，且覆盖所述第二子挡墙。
根据本发明一优选实施例，所述挡墙采用可固化的液态吸湿剂或掺杂吸湿颗粒的有机材料。
根据本发明一优选实施例，所述基底表面还设置有止裂件，所述止裂件围绕所述通孔设置，且位于所述挡墙与所述通孔之间。
根据本发明一优选实施例，所述通孔的孔形为规则平面图形或异形平面图形。
根据本发明一优选实施例，所述通孔位于所述OLED面板靠近边缘的位置，或者所述通孔与所述OLED面板边缘一体成型。
本发明还提供另一种OLED显示面板，包括基底、设置于所述基底表面的OLED发光层、以及设置于所述OLED发光层表面的薄膜封装层；
所述OLED显示面板的显示区形成有通孔、以及用于防止所述通孔侵入水汽的阻水结构；所述阻水结构包括：
沟槽，形成于所述基底表面，所述沟槽围绕所述通孔设置；以及，
挡墙，形成于所述沟槽内，且突出于所述OLED发光层表面；
所述薄膜封装层包括层叠设置的阻水层和应力缓冲层，所述阻水层的开孔边缘与所述通孔的边缘平齐，所述应力缓冲层形成于所述挡墙之外。
根据本发明一优选实施例，所述沟槽内壁向所述沟槽的中心倾斜或弯曲。
根据本发明一优选实施例，所述阻水结构包括第一子沟槽和第二子沟槽，所述第一子沟槽围绕所述通孔设置，所述第二子沟槽围绕所述第一子沟槽设置；
所述第一子沟槽内设置有第一子挡墙，所述第二子沟槽内设置有第二子挡墙。
根据本发明一优选实施例，所述第一子挡墙的高度大于所述第二子挡墙的高度。
根据本发明一优选实施例，所述应力缓冲层形成于所述第二子挡墙外。
根据本发明一优选实施例，所述应力缓冲层形成于所述第一子挡墙外，且覆盖所述第二子挡墙。
根据本发明一优选实施例，所述挡墙采用可固化的液态吸湿剂或掺杂吸湿颗粒的有机材料。
根据本发明一优选实施例，所述基底表面还设置有止裂件，所述止裂件围绕所述通孔设置，且位于所述挡墙与所述通孔之间。
根据本发明一优选实施例，所述通孔的孔形为规则平面图形或异形平面图形。
根据本发明一优选实施例，所述通孔位于所述OLED面板靠近边缘的位置，或者所述通孔与所述OLED面板边缘一体成型。
相较于现有的OLED显示面板，本发明在OLED显示面板的切割处设置有阻水挡墙，将切割处的发光器件与显示区的发光器件水汽隔绝，进而保护面板内发光器件免受水汽侵蚀，进而延长OLED显示面板的显示寿命；解决了现有的屏内异形切割技术中，OLED显示面板切割后，切割处无封装层保护，从而暴露出发光器件，水汽从切割处侵入OLED显示面板导致发光器件损坏，进而影响整个面板的显示品质。
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1a为本发明提供的OLED显示面板主视结构示意图；
图1b为图1a的A处放大图；
图1c为本发明提供的另一OLED显示面板主视结构示意图；
图1d为图1c的A’处放大图。
图2a至2f为本发明提供的OLED显示面板制备流程图。
图3a为本发明提供的OLED显示面板一截面结构示意图；
图3b为本发明提供的另一OLED显示面板截面结构示意图。
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
本发明针对现有的屏内异形切割技术中，OLED显示面板切割后，切割处无封装层保护，从而暴露出发光器件，水汽从切割处侵入OLED显示面板导致发光器件损坏，进而影响整个面板的显示品质的技术问题，本实施例能够解决该缺陷。
如图1a、图b所示，本发明实施例提供的OLED显示面板101，所述OLED显示面板101的显示区域102开设有用于安置手机前置摄像头的通孔103，所述通孔103的孔形可以为圆形，所述通孔103位于所述OLED面板靠近边缘的位置；所述OLED显示面板101膜层内设置有至少一沟槽（图中未示出），所述沟槽内设置有挡墙104，所述挡墙104用于阻止水汽通过所述通孔103边缘进入所述OLED显示面板101内。
所述挡墙104围绕所述通孔103设置，所述挡墙104的任意位置与所述通孔103的边缘之间的垂直间距相等，即所述挡墙104的轮廓形状与所述通孔103的孔形相同，且所述通孔103位于所述挡墙104的轮廓中心。
所述OLED显示面板101包括基底105、设置于所述基底105表面的OLED发光层、以及设置于所述OLED发光层表面的薄膜封装层；所述通孔103贯穿所述基底105、所述OLED发光层以及所述薄膜封装层；所述薄膜封装层至少包括层叠设置的第一阻水层、应力缓冲层及第二阻水层。
所述OLED显示面板101还包括阻水结构，所述阻水结构包括沟槽和挡墙104；所述沟槽形成于所述基底105表面，所述挡墙104形成于所述沟槽内，且高于位于所述基底105表面的OLED发光层。
如图1c、1d所示，本发明提供的OLED显示面板101，位于所述OLED显示面板101的通孔103的孔形还可以为水滴形。
进一步，所述通孔103与所述OLED面板边缘一体成型。
当所述通孔103为水滴形，且所述通孔103与所述OLED面板边缘一体成型时，所述沟槽的轮廓为非封闭式，所述沟槽沿所述通孔103的边缘设置，且所述沟槽的端部延伸至所述显示面板的边缘，所述沟槽内形成有挡墙104。
如图2a，所述OLED显示面板包括基底201，所述基底201表面定义有显示区域2011、位于所述显示区域2011内的阻水区域2012、以及位于所述阻水区域2012内的预切割区域2013；所述阻水区域2012内形成有沟槽202。
所述沟槽202内壁向所述沟槽202的中心倾斜或弯曲，使得所述沟槽202的口部宽度小于内部宽度，以收紧所述沟槽202内部的阻水材料，避免脱落。
例如，所述基底201的纵向截面中，所述沟槽202的截面形状为缺口圆形，缺口圆形为非闭合的圆弧，所述缺口圆形的任一端点为所述基底201表面与所述缺口圆形的切线的交点，与所述基底201表面与所述切线之间形成的夹角小于90度。
又如，所述基底201的纵向截面中，所述沟槽202的截面形状为缺顶梯形，所述梯形的腰边与所连接的基底201表面之间形成的夹角小于90度。
所述基底201表面的阻水区域2012还设置有止裂件203，所述止裂件203围绕所述预切割区域2013设置，所述止裂件203位于所述沟槽202与所述预切割区域2013之间；所述止裂件203用以将开设所述通孔204产生的裂纹限制在其圈围范围内。
如图2b所示，所述OLED显示面板包括基底201，所述基底201表面定义有显示区域2011、位于所述显示区域2011内的阻水区域2012、以及位于所述阻水区域2012内的预切割区域2013；所述阻水区域2012内形成有沟槽202。
所述基底201表面制备有OLED发光层205，位于所述沟槽202处的OLED发光材料会出现断层，然后沉积在所述沟槽202底部，使得预切割区域2013边缘的OLED发光材料与显示区域2011的OLED发光材料阻断，以防止水汽从所述通孔204边缘传播至显示区域2011内；同时，位于所述止裂件203处的OLED发光材料会沉积在所述止裂件203表面，与所述显示区域2011内的OLED发光材料会形成断层，以将所述预切割区域2013边缘的OLED发光材料与所述显示区域2011内的OLED发光材料阻断，防止开设所述通孔204产生的裂纹延伸至所述显示区域2011内，引起所述显示区域2011内的发光器件的损坏。
所述OLED发光层205制备完成之后，使用喷墨打印技术或电流体打印技术在所述沟槽202内填充阻水材料，所述阻水材料可以采用可固化的液态吸湿剂或掺杂吸湿颗粒（如：CaO纳米颗粒）的有机材料，所述阻水材料填满所述沟槽202且高于所述OLED发光层205表面，固化后形成所述挡墙206。
如图2c所示，所述OLED显示面板包括基底201，所述基底201表面定义有显示区域2011、位于所述显示区域2011内的阻水区域2012、以及位于所述阻水区域2012内的预切割区域2013；所述阻水区域2012内形成有沟槽202和止裂件203，所述基底201表面形成有OLED发光层205，所述沟槽202内形成有所述挡墙206。
所述基底201表面设置有第一阻水层207，所述第一阻水层207覆盖所述显示区域2011、所述阻水区域2012以及所述预切割区域2013。
所述第一阻水层207为无机材料薄膜，所述第一阻水层207的材料为Al
2O
3、TiO
2、SiNx、SiCNx、SiOx的其中一种或一种以上的组合材料。
如图2d所示，所述OLED显示面板包括基底201，所述基底201表面定义有显示区域2011、位于所述显示区域2011内的阻水区域2012、以及位于所述阻水区域2012内的预切割区域2013；所述阻水区域2012内形成有沟槽202和止裂件203，所述基底201表面形成有OLED发光层205，所述沟槽202内形成有所述挡墙206；所述基底201表面设置有第一阻水层207，所述第一阻水层207覆盖所述显示区域2011、所述阻水区域2012以及所述预切割区域2013。
所述第一阻水层207表面制备有应力缓冲层208，所述应力缓冲层208形成于所述挡墙206之外的区域；所述应力缓冲层208为有机材料层，用于缓冲OLED面板在弯曲或折叠时的应力，减少应力过大对OLED发光层205造成的损害；所述应力缓冲层208的材料为亚克力、六甲基二甲硅醚、聚丙烯酸酯类、聚碳酸脂类、聚苯乙烯的其中一种或一种以上的组合材料。
如图2e所示，所述OLED显示面板包括基底201，所述基底201表面定义有显示区域2011、位于所述显示区域2011内的阻水区域2012、以及位于所述阻水区域2012内的预切割区域2013；所述阻水区域2012内形成有沟槽202和止裂件203，所述基底201表面形成有OLED发光层205，所述沟槽202内形成有所述挡墙206；所述基底201表面设置有第一阻水层207，所述第一阻水层207覆盖所述显示区域2011、所述阻水区域2012以及所述预切割区域2013；所述第一阻水层207表面制备有应力缓冲层208。
所述基底201表面形成有第二阻水层209，所述第二阻水层209覆盖所述显示区域2011、所述阻水区域2012以及所述预切割区域2013，所述第二阻水层209采用的材料与所述第一阻水层207采用的材料一致，此处不再赘述。
如图2f所示，所述OLED显示面板包括基底201，所述基底201表面定义有显示区域2011、位于所述显示区域2011内的阻水区域2012、以及位于所述阻水区域2012内的预切割区域2013；所述阻水区域2012内形成有沟槽202和止裂件203，所述基底201表面形成有OLED发光层205，所述沟槽202内形成有所述挡墙206；所述基底201表面设置有第一阻水层207，所述第一阻水层207覆盖所述显示区域2011、所述阻水区域2012以及所述预切割区域2013；所述第一阻水层207表面制备有应力缓冲层208以及第二阻水层209。
利用laser切割技术将所述预切割区域2013去除，形成所述通孔204，所述第一阻水层207和第二阻水层209的开孔边缘与所述通孔204的边缘平齐，所述应力缓冲层208形成于所述挡墙206之外。
如图3a所示，所述OLED显示面板包括基底301、沟槽302、止裂件303、OLED发光层305、形成于所述沟槽302内的挡墙306、以及设置于所述基底301表面的第一阻水层307、应力缓冲层308以及第二阻水层309。
其中，所述基底301表面形成有第一子沟槽3021和第二子沟槽3021，所述第一子沟槽3021围绕所述通孔304设置，所述第二子沟槽3021围绕所述第一子沟槽3021设置；所述第一子沟槽3021内设置有第一子挡墙3061，所述第二子沟槽3021内设置有第二子挡墙3062；且所述第一子挡墙3061的高度大于所述第二子挡墙3062的高度；其中，所述应力缓冲层308形成于所述第二子挡墙3062外。通过设置两层挡墙，可延长水汽侵入所述显示区域3011的路径，进一步保护OLED发光层305免收水汽侵蚀。
如图3b所示，所述应力缓冲层308形成于所述第一子挡墙3061外，且覆盖所述第二子挡墙3062，以增加薄膜封装层的覆盖区域，进一步提高器件阻隔水汽的作用，进而提升OLED发光器件的使用寿命。
本发明的有益效果为：相较于现有的OLED显示面板，本发明在OLED显示面板的切割处设置有阻水挡墙，将切割处的发光器件与显示区的发光器件水汽隔绝，进而保护面板内发光器件免受水汽侵蚀，进而延长OLED显示面板的显示寿命；解决了现有的屏内异形切割技术中，OLED显示面板切割后，切割处无封装层保护，从而暴露出发光器件，水汽从切割处侵入OLED显示面板导致发光器件损坏，进而影响整个面板的显示品质。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。
Claims (20)
- 一种OLED显示面板，其包括基底、设置于所述基底表面的OLED发光层、以及设置于所述OLED发光层表面的薄膜封装层；所述OLED显示面板的显示区形成有通孔、以及用于防止所述通孔侵入水汽的阻水结构；所述阻水结构包括：沟槽，形成于所述基底表面，所述沟槽围绕所述通孔设置；以及，挡墙，形成于所述沟槽内，且突出于所述OLED发光层表面；所述挡墙的轮廓形状与所述通孔的孔形相同，且所述通孔位于所述挡墙的轮廓中心；所述薄膜封装层包括层叠设置的阻水层和应力缓冲层，所述阻水层的开孔边缘与所述通孔的边缘平齐，所述应力缓冲层形成于所述挡墙之外。
- 根据权利要求1所述的OLED显示面板，其中，所述沟槽内壁向所述沟槽的中心倾斜或弯曲。
- 根据权利要求2所述的OLED显示面板，其中，所述阻水结构包括第一子沟槽和第二子沟槽，所述第一子沟槽围绕所述通孔设置，所述第二子沟槽围绕所述第一子沟槽设置；所述第一子沟槽内设置有第一子挡墙，所述第二子沟槽内设置有第二子挡墙。
- 根据权利要求3所述的OLED显示面板，其中，所述第一子挡墙的高度大于所述第二子挡墙的高度。
- 根据权利要求4所述的OLED显示面板，其中，所述应力缓冲层形成于所述第二子挡墙外。
- 根据权利要求4所述的OLED显示面板，其中，所述应力缓冲层形成于所述第一子挡墙外，且覆盖所述第二子挡墙。
- 根据权利要求1所述的OLED显示面板，其中，所述挡墙采用可固化的液态吸湿剂或掺杂吸湿颗粒的有机材料。
- 根据权利要求1所述的OLED显示面板，其中，所述基底表面还设置有止裂件，所述止裂件围绕所述通孔设置，且位于所述挡墙与所述通孔之间。
- 根据权利要求1所述的OLED显示面板，其中，所述通孔的孔形为规则平面图形或异形平面图形。
- 根据权利要求9所述的OLED显示面板，其中，所述通孔位于所述OLED面板靠近边缘的位置，或者所述通孔与所述OLED面板边缘一体成型。
- 一种OLED显示面板，其包括基底、设置于所述基底表面的OLED发光层、以及设置于所述OLED发光层表面的薄膜封装层；所述OLED显示面板的显示区形成有通孔、以及用于防止所述通孔侵入水汽的阻水结构；所述阻水结构包括：沟槽，形成于所述基底表面，所述沟槽围绕所述通孔设置；以及，挡墙，形成于所述沟槽内，且突出于所述OLED发光层表面；所述薄膜封装层包括层叠设置的阻水层和应力缓冲层，所述阻水层的开孔边缘与所述通孔的边缘平齐，所述应力缓冲层形成于所述挡墙之外。
- 根据权利要求11所述的OLED显示面板，其中，所述沟槽内壁向所述沟槽的中心倾斜或弯曲。
- 根据权利要求12所述的OLED显示面板，其中，所述阻水结构包括第一子沟槽和第二子沟槽，所述第一子沟槽围绕所述通孔设置，所述第二子沟槽围绕所述第一子沟槽设置；所述第一子沟槽内设置有第一子挡墙，所述第二子沟槽内设置有第二子挡墙。
- 根据权利要求13所述的OLED显示面板，其中，所述第一子挡墙的高度大于所述第二子挡墙的高度。
- 根据权利要求14所述的OLED显示面板，其中，所述应力缓冲层形成于所述第二子挡墙外。
- 根据权利要求14所述的OLED显示面板，其中，所述应力缓冲层形成于所述第一子挡墙外，且覆盖所述第二子挡墙。
- 根据权利要求11所述的OLED显示面板，其中，所述挡墙采用可固化的液态吸湿剂或掺杂吸湿颗粒的有机材料。
- 根据权利要求11所述的OLED显示面板，其中，所述基底表面还设置有止裂件，所述止裂件围绕所述通孔设置，且位于所述挡墙与所述通孔之间。
- 根据权利要求11所述的OLED显示面板，其中，所述通孔的孔形为规则平面图形或异形平面图形。
- 根据权利要求19所述的OLED显示面板，其中，所述通孔位于所述OLED面板靠近边缘的位置，或者所述通孔与所述OLED面板边缘一体成型。
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