WO2020015430A1 - 显示屏及显示装置 - Google Patents

显示屏及显示装置 Download PDF

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Publication number
WO2020015430A1
WO2020015430A1 PCT/CN2019/084860 CN2019084860W WO2020015430A1 WO 2020015430 A1 WO2020015430 A1 WO 2020015430A1 CN 2019084860 W CN2019084860 W CN 2019084860W WO 2020015430 A1 WO2020015430 A1 WO 2020015430A1
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WIPO (PCT)
Prior art keywords
display screen
support
screen according
layer
film layers
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Ceased
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PCT/CN2019/084860
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English (en)
French (fr)
Inventor
杜杨
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Yungu Guan Technology Co Ltd
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Yungu Guan Technology Co Ltd
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Priority to US16/724,202 priority Critical patent/US11108016B2/en
Publication of WO2020015430A1 publication Critical patent/WO2020015430A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H10K59/80—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
    • 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
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • 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
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H10K59/1216—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being capacitors
    • 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
    • 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
    • H10K59/124—Insulating layers formed between TFT elements and OLED elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • 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
    • H10K2102/311—Flexible 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
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display screen and a display device.
  • a display screen including a display area, the display area including a pixel area and a non-pixel area located around the pixel area;
  • the display screen includes a plurality of film layers stacked, and at least one support column is disposed in the plurality of film layers.
  • the support column is located in the non-pixel area, and the support column is embedded in at least two film layers in the longitudinal direction.
  • the longitudinal direction refers to a direction perpendicular to a surface of the display screen.
  • the support post is integrally formed.
  • the number of the support pillars is several, and several of the support pillars are distributed in different film layers.
  • the number of the supporting pillars is several.
  • the ratio of the sum of the projected areas of the support pillars on the surface of the film layer to the area of the pixel region is 1: 1 to 1:10.
  • a material of the support pillar is polyimide or silicone.
  • the display screen includes a plurality of sub-pixels, and a plurality of the evenly distributed support pillars are disposed on the periphery of each of the sub-pixels.
  • the opening of each of the sub-pixels is rectangular, and two first support columns and two second support columns are provided around each of the sub-pixels;
  • the support pillars are symmetrically arranged along a line connecting the midpoints of the long sides of the rectangle, and the two second support pillars are symmetrically arranged along a line connecting the midpoints of the short sides of the rectangle.
  • two adjacent sub-pixels share one support post.
  • the plurality of film layers include a support substrate, a buffer layer, a first interlayer insulating layer, a capacitor insulating dielectric layer, a second interlayer insulating layer, a planarization layer, a pixel defining layer, and a thin film encapsulation layer ;
  • a top end of the support pillar is flush with a top end of the pixel defining layer, and a bottom end of the support pillar is located on the support substrate.
  • the support post includes a plurality of superimposed sub-support posts.
  • the materials of the plurality of sub-support pillars are the same.
  • the cross-sectional shape of the support post parallel to the surface of the film layer is circular or oval, or rectangular or triangular.
  • the support pillar is mesh-shaped.
  • a display device which includes the display screen described above.
  • the supporting pillars are embedded in at least two film layers, when being impacted by a heavy object, the stress is more easily propagated along the axial direction of the supporting pillars, and the lateral propagation of stress in the film layer is reduced Probability, thus avoiding damage and peeling of the film layer, thereby avoiding display failure.
  • Figure 1 is a schematic diagram of a display screen
  • FIG. 2 is a front view of a display screen according to an embodiment of the present disclosure
  • FIG. 3 is a side view of a display screen according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of a distribution of support columns in a display screen according to an embodiment of the present disclosure
  • FIG. 5 is a schematic view of a slot of a film layer of a display screen according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram after a groove is formed on a film layer of a display screen according to another embodiment of the present disclosure.
  • the display screen 100 ′ includes a display area 110 ′.
  • the display area 110 ' includes a pixel area 120' and a non-pixel area 130 'located around the pixel area 120'.
  • the display screen 100 ′ includes a plurality of film layers 140 ′ arranged in a stack.
  • the plurality of film layers 140 ′ may include, for example, a support substrate 141 ′, an array film layer 142 ′, an organic glue layer 143 ′, and a thin film encapsulation layer 144 ′.
  • the display screen 100 ′ may further include other elements such as a polarizer 145 ′ and a cover plate 147 ′ on the film layers 140 ′, and may further include an optical adhesive 146 ′ located between the polarizer 145 ′ and the cover plate 147 ′. .
  • the present disclosure proposes a display screen and a display device capable of preventing display failure when a heavy object strikes.
  • a display screen 100 includes a display area 110.
  • the display area 110 includes a pixel area 120 and a non-pixel area 130 located around the pixel area 120.
  • the display area 110 refers to an area for display other than a frame.
  • the display screen 100 may further include a frame area (not shown) surrounding the display area 110.
  • the pixel area 120 refers to an area where several sub-pixels are located in the display screen 100.
  • the non-pixel region 130 refers to a region other than the pixel region 120 in the display region 110, for example, a region corresponding to a pixel-defining layer (PDL).
  • PDL pixel-defining layer
  • the display screen 100 includes a plurality of film layers 140 arranged in a stack. At least one supporting post 150 is disposed in the plurality of film layers 140.
  • the support pillar 150 is located in the non-pixel region 130, and the support pillar 150 is embedded in at least two film layers in the longitudinal direction.
  • the longitudinal direction refers to a direction perpendicular to the surface of the display screen 100.
  • film layers 140 include a support substrate 141, an array film layer 142, an organic glue layer 143, and a thin film encapsulation layer 144, as shown in FIG.
  • the support substrate 141 may be a flexible substrate such as PI (polyimide).
  • the array film layer 142 includes a first buffer layer 1421, a second buffer layer 1422, a first interlayer insulation layer (GI) 1423, a capacitor inner dielectric layer (CI) 1424, and a second interlayer insulation layer (ILD1) 1425. And a third interlayer insulation layer (ILD2) 1426, as shown in FIG.
  • the first buffer layer 1421 is silicon nitride (SiNx)
  • the second buffer layer 1422 is silicon oxide (SiOx).
  • the materials of the first buffer layer 1421 and the second buffer layer 1422 are not limited thereto.
  • the first buffer layer 1421 may also be silicon oxide
  • the material of the second buffer layer 1422 may also be silicon nitride. It can be understood that the array film layer 142 is not limited to this.
  • the organic glue layer 143 includes a planarization layer (PLN) 1431, a first pixel-defining layer (PDL) 1432, a second pixel-defining layer (SPC) 1433, and the like.
  • the first pixel-defining layer (PDL) 1432 and the second pixel-defining layer (SPC) 1433 can also be referred to as pillars. It can be understood that the organic glue layer 143 is not limited to this.
  • the display screen 100 also includes other components such as a polarizer (POL) 145 and a cover film (glass) 147 on a plurality of film layers 140, and may further include an optical adhesive between the polarizer 145 and the cover 147. 146.
  • POL polarizer
  • glass cover film
  • the support pillar 150 is embedded in at least two film layers in the longitudinal direction, which means that the support pillar 150 can be embedded in two or more film layers in the longitudinal direction.
  • the longitudinal direction refers to a direction perpendicular to the surface of the display screen 100, that is, a direction extending from the display surface of the display screen 100 to the back or the opposite direction.
  • Embedding means that at least a portion of the support post 150 projects into at least two film layers.
  • the two end film layers of the plurality of film layers 140 are a support substrate 141 and a thin film encapsulation layer 144, respectively.
  • the bottom end of the support pillar 150 can be embedded in the support substrate 141, but should not penetrate the support substrate 141 to prevent external water vapor from penetrating from the bottom of the display screen 100 into the interior of the display screen 100.
  • the top of the support post 150 may be embedded in the thin film encapsulation layer 144, but the thin film encapsulation layer 144 should not be penetrated to avoid package failure.
  • the supporting column 150 since the supporting column 150 is located in the non-pixel area 130, the display of each sub-pixel will not be affected. Because the supporting pillars 150 are embedded in at least two film layers in the longitudinal direction. Therefore, when impacted by a heavy object, the stress is more likely to propagate along the axial direction of the support pillar 150, reducing the probability of stress propagating laterally in the film layer, which can prevent the stress from propagating laterally in the film layer and damaging the function in the pixel region Layer, and can avoid peeling between two adjacent film layers, thereby avoiding display failure.
  • a top end of the support post 150 is flush with a top end of the second pixel defining layer 1433, and a bottom end of the support post 150 is located on the support base 141. Therefore, the extension distance of the support pillars 150 in the film layer is long. When a heavy object is struck, the distance that the stress propagates along the axial direction of the support pillars 150 is long, which effectively reduces the probability of stress propagating laterally in the film layer and avoids stress Transverse propagation in the film layer damages the cathode and anode, thereby avoiding display failure.
  • the support post 150 is integrally formed.
  • the integral formation of the support pillar 150 means that the support pillar 150 is prepared by a single process, and the support pillar 150 thus obtained is a whole.
  • the stress is more likely to propagate along the axial direction of the integrated support pillar 150, reducing the probability of stress propagating laterally in the film layer, which can prevent the stress from propagating laterally in the film layer and damaging the pixel area.
  • the functional layer can also prevent peeling between two adjacent film layers, thereby avoiding display failure.
  • the support pillar may further include a plurality of superimposed sub-support pillars (not shown).
  • the sub-support pillars are made of the same material. In this way, when the stress is applied, the stress is easier to propagate along the axial direction of the support column, and the probability of the stress to propagate laterally in the film layer is reduced, thereby avoiding display failure.
  • the number of the supporting pillars 150 is several, and the ratio of the sum of the projected areas of the supporting pillars 150 on the surface of the film layer to the area of the pixel region 120 is 1: 1 to 1:10.
  • the ratio of the sum of the projected areas of the support pillars 150 on the surface of the film layer to the area of the pixel region 120 is not limited to this, and it may be set so as not to affect the pixel light emission.
  • the material of the support pillar 150 is polyimide or silicone.
  • organic silicon is an organic silicon compound, which refers to a compound containing a Si-C bond and at least one organic group is directly connected to a silicon atom.
  • the support pillars 150 of these kinds of materials have a certain support strength. When being impacted by a heavy object, the support pillars 150 of these kinds of materials can bear a certain stress, and transmit this part of stress downward in the axial direction of the support pillars 150.
  • the manufacturing temperature of the support pillars 150 of these kinds of materials is not high, so as to avoid the temperature being too high and adversely affecting the organic functional layer.
  • the material of the support pillar 150 may also be other organic polymers that do not affect the performance of the display screen.
  • the display screen 100 includes a plurality of sub-pixels 160, and a plurality of uniformly-distributed support columns 150 are disposed on the periphery of each sub-pixel 160.
  • the uniform distribution means that the support pillars are regularly distributed around the periphery of the sub-pixel 160 and the distances between two adjacent support pillars are not significantly different. This can evenly disperse the stress when hit by a heavy object, and effectively avoid display failure.
  • each sub-pixel 160 is rectangular, and two first support columns 151 (150) and two second support columns 152 (150) are provided around each sub-pixel 160.
  • two first support columns 151 (150) are symmetrically arranged along the line connecting the midpoints of the long sides of the rectangle
  • two second support columns 152 (150) are symmetrically arranged along the line connecting the midpoints of the short sides of the rectangle, as shown in the figure. 4 shown.
  • This can protect the sub-pixels 160 from all aspects. When a heavy object is struck, stress can be quickly transmitted along the axial direction of the support columns 150 around it, thereby avoiding damage to the sub-pixels 160 and effectively avoiding display failure.
  • two adjacent sub-pixels 160 share one support post 150.
  • the supporting pillars 150 are reasonably arranged, wherein one supporting pillar 150 can protect the sub-pixels on both sides.
  • the length of the support post 150 is 5.8 ⁇ m to 7.2 ⁇ m.
  • the stress transmitted by the impact of a heavy object in the support pillar 150 is transmitted downward in the axial direction for a long distance, and the stress can be fully transmitted to the lower side in the axial direction. It is fully avoided that the stress is transmitted in the lateral direction to damage the sub-pixels, thereby effectively avoiding display failure.
  • the position of the support post is not limited to this.
  • the support pillars can be embedded in at least two film layers in the longitudinal direction.
  • the support post may be embedded in two or more film layers.
  • the two film layers may be any two adjacent film layers.
  • the support pillar is embedded in the support substrate and the first buffer layer, or the second pixel defining layer and the thin film encapsulation layer are embedded.
  • the position of the support column needs to avoid the circuit design of the array film layer and avoid affecting the wiring.
  • the number of support pillars is several, and the plurality of support pillars are distributed in different film layers.
  • the supporting pillars distributed in different film layers can play different supporting functions to avoid the stress of a film layer being too large to pass down and damage, or to the adjacent film layer. Between peeling, thereby avoiding display failure.
  • the support pillars are embedded in at least two film layers, when being impacted by a heavy object, the stress is more easily propagated along the axial direction of the support pillars, and the probability of the stress propagating laterally in the film layer is reduced. Therefore, damage and peeling of the film layer are avoided, thereby preventing display failure.
  • a slotting process is performed on a position where a support pillar is needed.
  • a slot is formed on the array film layer 142 to obtain a groove 170.
  • Grooving can be performed by using physical etching, chemical etching, and the like, where chemical etching includes plasma etching or laser etching.
  • an organic glue layer 143 is formed on the slotted array film layer 142, and then the material deposited in the groove 170 can be etched away.
  • the display screen shown in FIG. 2 can be obtained.
  • grooves may be formed on any film layer in the process of preparing the plurality of film layers 140.
  • a planarization layer (PLN) 1431 may be formed and then grooved to obtain a groove 180, as shown in FIG. 6.
  • Grooving can also be performed using physical etching, chemical etching and other processes. Among them, chemical etching includes plasma etching or laser etching. Then, a first pixel-defining layer (PDL) 1432 and a second pixel-defining layer (SPC) 1433 are formed on the slotted planarization layer 1431, and then the material deposited in the groove 180 can be etched away. Finally, the display screen shown in FIG. 2 can also be obtained.
  • PDL pixel-defining layer
  • SPC second pixel-defining layer
  • a display device includes the display screen described above.
  • the display is preferably an OLED display.
  • the cross-sectional shape of the support post 150 along the surface parallel to the film layer is circular, oval, rectangular, or triangular. These cross-sectional shapes are relatively regular, which facilitates the downward transmission of stress along the axial direction of the support column 150.
  • the cross-sectional shape of the support post 150 parallel to the surface of the film layer is preferably circular.
  • the manufacturing process of the support pillar 150 with a circular cross section is simple, and it is not necessary to control the angle of the included angle of the edge.
  • the cross-sectional shape of the support pillar 150 along the surface parallel to the surface of the film layer is not limited to this, and may be other shapes.
  • the support pillars can also be set in a mesh shape, that is, the support pillars are a whole, and the sub-pixels are located in the mesh holes of the mesh-shaped support pillars, which can protect the sub-pixels in all directions and fully avoid display failure.
  • the display device to which the technical solution of the present disclosure is applied includes the above display screen. Since the support pillars are embedded in at least two film layers, when being impacted by a heavy object, the stress is more easily propagated along the axial direction of the support pillars, which reduces the stress in the film layer. The probability of lateral propagation, thus avoiding damage and peeling of the film layer, thereby avoiding display failure.

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  • Microelectronics & Electronic Packaging (AREA)
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Abstract

本公开涉及一种显示屏及显示装置。显示屏包括显示区，显示区包括像素区以及位于像素区周围的非像素区；显示屏包括层叠设置的若干膜层，若干膜层内设置有至少一个支撑柱，支撑柱位于非像素区内，且支撑柱沿纵向嵌入至少两层膜层内，纵向指垂直于显示屏的表面的方向。应用本公开技术方案的显示屏，由于支撑柱嵌入至少两层膜层内，当受到重物撞击时，应力更容易沿支撑柱的轴向传播，减少了应力在膜层内横向传播的几率，因而避免了膜层的损伤和剥离，从而避免了显示失效。此外，还提供一种包括上述的显示屏的显示装置。应用本公开技术方案的显示装置，当受到重物撞击时，应力更容易沿支撑柱的轴向传播，避免了膜层的损伤和剥离，从而避免了显示失效。

Description

显示屏及显示装置
援引加入
本申请要求于2018年7月16日提交中国专利局、申请号为201810778595.1、发明名称为“显示屏及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，特别是涉及一种显示屏及显示装置。
背景技术
随着显示技术的发展，消费者对显示屏的高品质的需求越来越大。然而，传统的显示屏受到重物撞击时，容易造成显示失效，不利于应用。
发明内容
基于此，有必要针对如何避免重物撞击时造成显示失效的问题，提供一种能够避免重物撞击时显示失效的显示屏及显示装置。
一种显示屏，所述显示屏包括显示区，所述显示区包括像素区以及位于所述像素区周围的非像素区；
所述显示屏包括层叠设置的若干膜层，所述若干膜层内设置有至少一个支撑柱，所述支撑柱位于所述非像素区内，且所述支撑柱沿纵向嵌入至少两层膜层内，所述纵向指垂直于所述显示屏的表面的方向。
在其中一个实施例中，所述支撑柱为一体成型。
在其中一个实施例中，所述支撑柱的个数为若干个，且若干个所述支撑柱分布于不同膜层内。
在其中一个实施例中，所述支撑柱的个数为若干个。
在其中一个实施例中，若干个所述支撑柱在所述膜层表面的投影面积的和 与所述像素区的面积的比值为1：1～1：10。
在其中一个实施例中，所述支撑柱的材质为聚酰亚胺或者有机硅。
在其中一个实施例中，所述显示屏包括若干个子像素，每个所述子像素的外围设置有若干个均匀分布的所述支撑柱。
在其中一个实施例中，每个所述子像素的开口呈矩形，每个所述子像素的四周设置有两个第一支撑柱以及两个第二支撑柱；其中，两个所述第一支撑柱沿矩形长边中点的连线呈对称设置，两个所述第二支撑柱沿矩形短边中点的连线呈对称设置。
在其中一个实施例中，相邻两个所述子像素共用一个支撑柱。
在其中一个实施例中，所述若干膜层包括支撑基底、缓冲层、第一层间绝缘层、电容内绝缘介质层、第二层间绝缘层、平坦化层、像素限定层以及薄膜封装层；
所述支撑柱的顶端与所述像素限定层的顶端平齐，所述支撑柱的底端位于所述支撑基底上。
在其中一个实施例中，所述支撑柱包括若干个叠加的子支撑柱。
在其中一个实施例中，所述若干个子支撑柱的材质相同。
在其中一个实施例中，所述支撑柱沿平行于膜层表面的截面形状为圆形或椭圆形或矩形或三角形。
在其中一个实施例中，所述支撑柱为网状。
此外，还提供一种显示装置，包括上述的显示屏。
应用本公开技术方案的显示屏及显示装置，由于支撑柱嵌入至少两层膜层内，当受到重物撞击时，应力更容易沿支撑柱的轴向传播，减少了应力在膜层内横向传播的几率，因而避免了膜层的损伤和剥离，从而避免了显示失效。
附图说明
图1为显示屏的示意图；
图2为本公开一实施方式的显示屏的正视图；
图3为本公开一实施方式的显示屏的侧视图；
图4为本公开一实施方式的显示屏中支撑柱的分布示意图；
图5为本公开一实施方式的在显示屏的膜层上开槽之后的示意图；
图6为本公开另一实施方式的在显示屏的膜层上开槽之后的示意图。
具体实施方式
为使本公开的上述目的、特征和优点能够更加明显易懂，下面结合附图对本公开的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本公开。但是本公开能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本公开内涵的情况下做类似改进，因此本公开不受下面公开的具体实施例的限制。
请参见图1，显示屏100'包括显示区110'。显示区110'包括像素区120'以及位于像素区120'周围的非像素区130'。其中，显示屏100'包括层叠设置的若干膜层140'。若干膜层140'例如可以包括支撑基底141'、array膜层142'、有机胶层143'以及薄膜封装层144'等。当然，显示屏100'还可以包括位于若干膜层140'上的偏光片145'与盖板147'等其他元件，还可以包括位于偏光片145'与盖板147'之间的光学胶146'。
柔性产品的可靠性依然是影响产品良率的主要问题，特别是在柔性屏的可靠性测试中，当使用32.65g的落球(直径为20mm的钢球，跌落高度2cm～62.5cm)沿图1中箭头所指方向击中屏幕时，被击中的区域瞬间出现黑斑、亮斑、彩斑等不良，导致柔性屏不能满足市场的应用需求。
本公开的发明人经过分析之后得到以下可能存在的原因导致上述不良：
1、落球击中阴极，阴极失效，出现黑斑；
2、某一子像素被破坏，出现彩斑；
3、落球击中阳极，造成阳极失效；
4、落球击中面板，粘附性差的膜层间易发生剥离，其中，阴极与下方的膜层最易剥离。
为此，本公开提出一种能够避免重物撞击时显示失效的显示屏及显示装置。
请参见图2～图4，本公开一实施方式的显示屏100包括显示区110。显示区110包括像素区120以及位于像素区120周围的非像素区130。
其中，显示区110指的是除边框之外用于显示的区域。显示屏100上除了显示区110，还可以包括围绕显示区110的边框区域(未图示)。像素区120指的是显示屏100内若干个子像素所在的区域。非像素区130指的是显示区110内除像素区120之外的区域，例如与像素限定层(PDL)对应的区域。
其中，显示屏100包括层叠设置的若干膜层140。若干膜层140内设置有至少一个支撑柱150。支撑柱150位于非像素区130内，且支撑柱150沿纵向嵌入至少两层膜层内，纵向指垂直于显示屏100的表面的方向。
其中，若干膜层140包括支撑基底141、array膜层142、有机胶层143以及薄膜封装层144，如图2所示。其中，支撑基底141可以为PI(聚酰亚胺)等柔性基底。
其中，array膜层142包括第一缓冲层1421、第二缓冲层1422、第一层间绝缘层(GI)1423、电容内绝缘介质层(CI)1424、第二层间绝缘层(ILD1)1425以及第三层间绝缘层(ILD2)1426，如图3所示。其中，第一缓冲层1421为氮化硅(SiNx)，第二缓冲层1422为氧化硅(SiOx)。当然，第一缓冲层1421和第二缓冲层1422的材质不限于此。例如，第一缓冲层1421还可以为氧化硅，第二缓冲层1422的材质还可以为氮化硅。可以理解的是，array膜层142亦不限于此。
其中，有机胶层143包括平坦化层(PLN)1431、第一像素限定层(PDL)1432以及第二像素限定层(SPC)1433等。其中，第一像素限定层(PDL)1432以及第二像素限定层(SPC)1433又可以称为隔离柱(pillar)。可以理解的是，有机胶层143亦不限于此。
此外，显示屏100还包括位于若干膜层140上的偏光片(POL)145与盖板(Cover film/glass)147等其他元件，还可以包括位于偏光片145与盖板147之间的光学胶146。
其中，支撑柱150沿纵向嵌入至少两层膜层内，指的是支撑柱150可沿纵向嵌入两层或者两层以上的膜层内。由于显示屏100整体为平面结构，故纵向指的是垂直于显示屏100的表面的方向，也就是自显示屏100的显示面向背面延伸的方向或者反方向。嵌入指的是支撑柱150的至少部分伸入至少两层膜层内。当支撑柱150沿纵向嵌入三层或者三层以上的膜层内时，支撑柱150穿透位于边缘两层膜层之间的膜层。
此外，若干膜层140的两端膜层分别为支撑基底141与薄膜封装层144。支撑柱150的底端可嵌入支撑基底141内，但不应穿透支撑基底141，避免外界的水汽从显示屏100的底部渗透进入显示屏100的内部。同样的，支撑柱150的顶端可嵌入薄膜封装层144内，但不应穿透薄膜封装层144，避免封装失效。
本公开的显示屏中，由于支撑柱150位于非像素区130内，故不会影响各个子像素的显示。由于支撑柱150沿纵向嵌入至少两层膜层内。因此，当受到重物撞击时，应力更容易沿支撑柱150的轴向传播，减少了应力在膜层内横向传播的几率，既能够避免应力在膜层内横向传播而损坏像素区内的功能层，又能够避免相邻两层膜层之间剥离，从而避免了显示失效。
请参见图3，在一实施方式的显示屏100中，支撑柱150的顶端与第二像素限定层1433的顶端平齐，支撑柱150的底端位于支撑基底141上。因此，支撑柱150在膜层内部的延伸距离长，当受到重物撞击时，应力沿支撑柱150的轴向传播的距离长，有效减少了应力在膜层内横向传播的几率，避免了应力在膜层内横向传播而损坏阴极和阳极等，从而避免了显示失效。
在一实施方式中，支撑柱150为一体成型。支撑柱150为一体成型指的是采用一次工艺制备得到支撑柱150，这样得到的支撑柱150为一个整体。当受到重物撞击时，应力更容易沿一体成型的支撑柱150的轴向传播，减少了应力在膜层内横向传播的几率，既能够避免应力在膜层内横向传播而损坏像素区内的功能层，又能够避免相邻两层膜层之间剥离，从而避免了显示失效。
当然，本公开的显示屏中，支撑柱的形式不限于此。支撑柱还可以包括若干个叠加的子支撑柱(未图示)，优选这些子支撑柱的材质相同。这样当受到应 力作用时，应力更容易沿支撑柱的轴向传播，亦可减少应力在膜层内横向传播的几率，从而避免显示失效。
在一实施方式中，支撑柱150的个数为若干个，若干个支撑柱150在膜层表面的投影面积的和与像素区120的面积的比值为1：1～1：10。此时，当显示屏100受到重物撞击时，应力能够迅速通过这些支撑柱150向下传递，有效减少了应力在膜层内横向传播的几率，避免了应力在膜层内横向传播而损坏阴极和阳极等功能层，从而避免了显示失效。
当然，若干个支撑柱150在膜层表面的投影面积的和与像素区120的面积的比值不限于此，以不影响像素发光进行设置即可。
在一实施方式中，支撑柱150的材质为聚酰亚胺或者有机硅。其中，有机硅即有机硅化合物，是指含有Si-C键、且至少有一个有机基是直接与硅原子相连的化合物。这些种类材质的支撑柱150具有一定的支撑强度，当受到重物撞击时，这些种类材质的支撑柱150能够承受一定的应力，且将这部分应力沿支撑柱150的轴向向下传递。此外，这些种类材质的支撑柱150的制作温度不高，避免温度过高而对有机功能层造成不良影响。当然，支撑柱150的材质还可以为其他不影响显示屏性能的有机高分子。
在一实施方式中，请一并参见图4，显示屏100包括若干个子像素160，每个子像素160的外围设置有若干个均匀分布的支撑柱150。其中，均匀分布指的是支撑柱在子像素160的外围有规律地、且相邻两个支撑柱之间的距离差别不大地分布。这样能够对受到重物撞击时的应力起到均匀地分散作用，有效避免显示失效。
在一实施方式中，每个子像素160的开口呈矩形，每个子像素160的四周设置有两个第一支撑柱151(150)以及两个第二支撑柱152(150)。其中，两个第一支撑柱151(150)沿矩形长边中点的连线呈对称设置，两个第二支撑柱152(150)沿矩形短边中点的连线呈对称设置，如图4所示。这样能够对子像素160起到全方位的保护作用，当受到重物撞击时，应力能够快速地沿四周的支撑柱150的轴向传递，避免对子像素160的损伤，有效避免显示失效。
在一实施方式中，相邻两个子像素160共用一个支撑柱150。这样合理布局支撑柱150，其中，一个支撑柱150能够对两侧的子像素起到保护作用。
在一实施方式中，支撑柱150的长度为5.8μm～7.2μm。当支撑柱150的长度为5.8μm～7.2μm时，受到重物撞击时的应力在支撑柱150内沿轴向向下传递的路程较长，能够充分将应力沿轴向传递至下方，则能够充分避免应力沿横向传递而损伤子像素等，从而有效避免显示失效。
当然，本公开的显示屏中，支撑柱的位置不限于此。支撑柱沿纵向嵌入至少两层膜层内即可。例如，在其他实施方式中，支撑柱可以嵌入两层或者两层以上的膜层中。其中，两层膜层可以为任意相邻两层的膜层。例如，支撑柱嵌入支撑基底与第一缓冲层、或者嵌入第二像素限定层与薄膜封装层等。此外需要说明的是，支撑柱的位置需要避开array膜层的线路设计，避免影响走线。
在另一实施方式中，支撑柱的个数为若干个，且若干个支撑柱分布于不同膜层内。当显示屏受到重物撞击时，分布于不同膜层内的支撑柱能够起到不同的支撑作用，避免某一膜层受到的应力过大来不及向下传递而损伤、或者与相邻膜层之间剥离，从而避免显示失效。
应用本公开技术方案的显示屏，由于支撑柱嵌入至少两层膜层内，当受到重物撞击时，应力更容易沿支撑柱的轴向传播，减少了应力在膜层内横向传播的几率，因而避免了膜层的损伤和剥离，从而避免了显示失效。
制作上述显示屏时，对需要做支撑柱的位置进行开槽处理，例如，请参见图5，首先，在M3完成之后，在array膜层142上开槽，得到凹槽170。可以采用物理刻蚀、化学刻蚀等工艺进行开槽，其中，化学刻蚀包括等离子刻蚀或者激光刻蚀等。之后在开槽后的array膜层142上形成有机胶层143，再将沉积入凹槽170内的材料刻蚀掉即可。最终可得到图2所示的显示屏。
需要说明的是，可以在制备多个膜层140过程中的任一膜层上开槽。例如还可以形成平坦化层(PLN)1431之后再开槽，得到凹槽180，如图6所示。亦可以采用物理刻蚀、化学刻蚀等工艺进行开槽，其中，化学刻蚀包括等离子刻蚀或者激光刻蚀等。之后在开槽后的平坦化层1431上形成第一像素限定层(PDL) 1432以及第二像素限定层(SPC)1433，再将沉积入凹槽180内的材料刻蚀掉即可。最终亦可得到图2所示的显示屏。
一实施方式的显示装置，包括上述的显示屏。显示屏优选为OLED显示屏。
在一实施方式中，支撑柱150沿平行于膜层表面的截面形状为圆形、椭圆形、矩形或者三角形。这些截面形状较规整，有利于应力沿支撑柱150的轴向向下传递。其中，支撑柱150沿平行于膜层表面的截面形状优选为圆形。截面为圆形的支撑柱150的制作工艺简单，不需要对边缘夹角进行角度控制。当然，支撑柱150沿平行于膜层表面的截面形状不限于此，亦可以为其他形状。
此外，还可以将支撑柱设置成网状，即支撑柱为一个整体，子像素位于网状支撑柱的网孔内，这样能够对子像素起到全方位的保护作用，充分避免显示失效。
应用本公开技术方案的显示装置，包括上述显示屏，由于支撑柱嵌入至少两层膜层内，当受到重物撞击时，应力更容易沿支撑柱的轴向传播，减少了应力在膜层内横向传播的几率，因而避免了膜层的损伤和剥离，从而避免了显示失效。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本公开的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对公开范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本公开构思的前提下，还可以做出若干变形和改进，这些都属于本公开的保护范围。因此，本公开的保护范围应以所附权利要求为准。

Claims (15)

  1. 一种显示屏，包括显示区，所述显示区包括像素区以及位于所述像素区周围的非像素区；
    所述显示屏包括层叠设置的若干膜层，所述若干膜层内设置有至少一个支撑柱，所述支撑柱位于所述非像素区内，且所述支撑柱沿纵向嵌入至少两层膜层内，所述纵向指垂直于所述显示屏的表面的方向。
  2. 根据权利要求1所述的显示屏，其中，所述支撑柱为一体成型。
  3. 根据权利要求1所述的显示屏，其中，所述支撑柱的个数为若干个，且若干个所述支撑柱分布于不同膜层内。
  4. 根据权利要求1所述的显示屏，其中，所述支撑柱的个数为若干个。
  5. 根据权利要求4所述的显示屏，其中，若干个所述支撑柱在所述膜层表面的投影面积的和与所述像素区的面积的比值为1：1～1：10。
  6. 根据权利要求1所述的显示屏，其中，所述支撑柱的材质为聚酰亚胺或者有机硅。
  7. 根据权利要求1所述的显示屏，其中，所述显示屏包括若干个子像素，每个所述子像素的外围设置有若干个均匀分布的所述支撑柱。
  8. 根据权利要求7所述的显示屏，其中，每个所述子像素的开口呈矩形，每个所述子像素的四周设置有两个第一支撑柱以及两个第二支撑柱；两个所述第一支撑柱沿矩形长边中点的连线呈对称设置，两个所述第二支撑柱沿矩形短边中点的连线呈对称设置。
  9. 根据权利要求7所述的显示屏，其中，相邻两个所述子像素共用一个支撑柱。
  10. 根据权利要求1所述的显示屏，其中，所述若干膜层包括支撑基底、缓冲层、第一层间绝缘层、电容内绝缘介质层、第二层间绝缘层、平坦化层、像素限定层以及薄膜封装层；
    所述支撑柱的顶端与所述像素限定层的顶端平齐，所述支撑柱的底端位于所述支撑基底上。
  11. 根据权利要求1所述的显示屏，其中，所述支撑柱包括若干个叠加的子支撑柱。
  12. 根据权利要求11所述的显示屏，其中，所述若干个子支撑柱的材质相同。
  13. 根据权利要求1所述的显示屏，其中，所述支撑柱沿平行于膜层表面的截面形状为圆形或椭圆形或矩形或三角形。
  14. 根据权利要求1所述的显示屏，其中，所述支撑柱为网状。
  15. 一种显示装置，包括如权利要求1～14中任一项所述的显示屏。
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