CN109192756B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109192756B CN109192756B CN201810949207.1A CN201810949207A CN109192756B CN 109192756 B CN109192756 B CN 109192756B CN 201810949207 A CN201810949207 A CN 201810949207A CN 109192756 B CN109192756 B CN 109192756B
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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
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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
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Abstract
The invention relates to a display panel and a display device. The invention provides a display panel, which comprises an array substrate and an organic light-emitting layer arranged on the array substrate; the organic light emitting layer includes pixels, and a pixel defining layer disposed between adjacent pixels; a supporting column is arranged on one side of the pixel limiting layer away from the array substrate; wherein a support post groove is formed on the pixel defining layer, and the support post is disposed in the support post groove. Above-mentioned display panel and display device are through setting up the support column in the support column fluting, make display panel when receiving external impact, transfer the inside of layer is injectd to the pixel with the instantaneous stress that increases of support column for stress is injectd at the pixel and is carried out horizontal and longitudinal diffusion in layer inside, thereby has avoided stress to concentrate near the support column, reaches the stress diffusion ability that promotes display panel under the external force impact, protects the purpose in pixel region.
Description
Technical Field
The present invention relates to the field of display devices, and in particular, to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display, also called an Organic electroluminescent display, is a new flat panel display device, and has the advantages of simple manufacturing process, low cost, low power consumption, high brightness, thin and Light volume, fast response speed, easy realization of color display and large screen display, easy realization of flexible display, and the like, thereby having a wide application prospect.
After the organic light emitting diode display is manufactured, a series of display screen reliability tests are generally required, the impact resistance of the screen is generally tested by adopting a ball drop test, in the test scheme and practical use, the phenomenon that local stress of the display screen is increased rapidly due to instant impact exists, so that abnormal display can be caused, and particularly, when the flexible screen is subjected to instant impact, the stress is increased rapidly due to the fact that a hard protective layer does not exist, so that display defects such as black spots, bright spots, color spots and the like are more likely to occur in a display area.
In the prior art, extra buffer materials are usually added to improve the abnormal display condition, but the thickness of the display screen is increased in such a way, and the bending performance is reduced.
Disclosure of Invention
In view of the above, there is a need to provide a display panel, a display device and a method for manufacturing the display panel, which can effectively absorb and release stress without adding an additional buffer material.
A display panel, comprising: the array substrate and the organic light emitting layer are arranged on the array substrate; the organic light emitting layer includes pixels, and a pixel defining layer disposed between adjacent pixels; a supporting column is arranged on one side of the pixel limiting layer away from the array substrate; wherein a support post groove is formed on the pixel defining layer, and a support post is disposed in the support post groove.
Above-mentioned display panel through setting up the support column in the support column fluting, makes display panel receive external impact when, with the inside of the layer is injectd to the pixel to the instantaneous stress transfer that increases of support column to make stress carry out horizontal and longitudinal diffusion in the inside of pixel injectd the layer, thereby avoided stress to concentrate near the support column, reach and promote the stress diffusivity of display panel under the external force impact, protect the purpose in pixel region. In addition, the display panel does not need to be provided with extra buffer materials, the thickness of the display panel is reduced, and the bending performance of the display panel is improved.
In one embodiment, the supporting posts are slotted or not slotted through the pixel defining layer, and the surface of the side of the supporting posts far away from the array substrate is higher than the surface of the side of the pixel defining layer far away from the array substrate.
In one embodiment, the display panel further includes an electrode layer disposed between the array substrate and the pixel defining layer, the electrode layer having a patterned structure, the supporting pillar slots being disposed over the electrode layer or in a hollow region of the patterned structure of the electrode layer.
In one embodiment, the display panel further includes a planarization layer disposed on a side of the pixel defining layer facing the array substrate, the planarization layer having extension grooves formed thereon at positions corresponding to the support pillar slots, the support pillars being continuously disposed in the support pillar slots and the extension grooves, and preferably, the extension grooves have a depth smaller than a thickness of the planarization layer.
In one embodiment, the supporting pillar comprises a bottom pillar disposed in the supporting pillar groove and a top pillar protruding above the pixel defining layer, and preferably, the bottom pillar and the top pillar are integrally formed.
In one embodiment, the shape of the bottom pillar of the support pillar is one or more of cylindrical, square, rectangular parallelepiped and prismatic; the shape of the supporting column slot is matched with that of the bottom column.
In one embodiment, the shape of the top pillar of the support pillar is one or more of a cylindrical shape, a square shape, a rectangular parallelepiped shape, a prismatic shape, a truncated cone shape, and a trapezoidal shape.
In one embodiment, the area of the surface of the top pillar far away from the array substrate is smaller than the area of the surface of the bottom pillar far away from the array substrate.
In one of the embodiments, the hardness of the support posts is greater than the hardness of the pixel defining layer.
A display device comprising the display panel of any of the above embodiments.
Drawings
FIG. 1 is a schematic cross-sectional view of a display panel in the prior art;
FIG. 2 is a schematic cross-sectional view illustrating a display panel according to an embodiment;
FIG. 3 is a schematic cross-sectional view illustrating a display panel according to another embodiment;
FIG. 4 is a schematic cross-sectional view illustrating a display panel according to still another embodiment;
FIG. 5 is a schematic cross-sectional view illustrating a display panel according to still another embodiment.
Detailed Description
The existing display device has the display defects of black spots, bright spots, color spots and the like after a ball drop experiment, and cannot be recovered, so that the display performance of electronic equipment is influenced. Through research on the prior art, it is found that when the display panel is subjected to a transient impact, the impact part of the display panel has a phenomenon of stress surge, and if the display panel cannot timely disperse and absorb the stress, the impact part has a problem of element damage or inter-film peeling.
Referring to fig. 1, a schematic cross-sectional structure of a display panel in the prior art is provided, as shown in fig. 1, in the prior art, support pillars 11 are usually disposed on an uppermost layer of a display panel 10, and the support pillars 11 surround a pixel region 12 and are used for supporting a cover plate, when the display panel 10 is subjected to an instantaneous impact, the support pillars 11 of the impacted portion are affected by a stress first, since the support pillars are disposed only on a surface of a pixel defining layer 13, the stress is concentrated around the support pillars 11 and is not easily diffused, and further a film layer around the support pillars 11 is damaged, so that the display panel 10 generates display defects such as black spots, bright spots, and color spots.
Based on this, the application provides a display panel, including array substrate and the organic light emitting layer of setting on array substrate, wherein, organic light emitting layer includes pixel and sets up the pixel limit layer between adjacent pixel, is formed with a plurality of support column fluting on the pixel limit layer, still is provided with a plurality of support column in the pixel limit layer one side of keeping away from array substrate, and the setting that each support column corresponds is in the support column fluting. When the display panel is impacted by an instant force, the supporting columns arranged in the supporting column grooves can release and disperse the stress which is increased instantly in the pixel limiting layer, so that the stress is prevented from being transmitted and rebounded in the pixel area around the supporting columns, elements in the pixel area are prevented from being damaged due to strong vibration, the impact resistance of the display panel is improved, and the purpose of protecting the pixel area under the impact of an external force is achieved.
In this application, the term "pixel" may be a pixel unit, or may be a sub-pixel constituting the pixel unit, where the sub-pixel may be any one of three primary color pixels, or may be any one of four primary color pixels, and is not limited herein.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit of the invention and the scope of the invention is not intended to be limited to the embodiments disclosed below.
In one embodiment, referring to fig. 2 and 3, a schematic cross-sectional structure of a display panel is shown. As shown in fig. 2 and fig. 3, the present embodiment first provides a display panel 100, which includes an array substrate 110 and an organic light emitting layer 120 disposed on the array substrate 110. The array substrate 110 includes a flexible substrate or a glass substrate and a TFT (Thin Film Transistor) array substrate; the organic light emitting layer 120 includes pixels 124 and a pixel defining layer 123 disposed between adjacent pixels 124. In the present embodiment, a plurality of supporting pillars are disposed on a side of the pixel defining layer 123 away from the array substrate 110, and a plurality of supporting pillar slots 130 are formed on the pixel defining layer 123, and correspondingly, each supporting pillar 140 is disposed in one supporting pillar slot 130, in the present embodiment, the supporting pillars 140 can both disperse the stress concentrated during the transient impact and support the cover plate and bear the impact force.
Above-mentioned display panel through setting up the support column in the support column fluting, makes display panel receive external impact when, with the inside of the layer is injectd to the pixel to the instantaneous stress transfer that increases of support column to make stress carry out horizontal and longitudinal diffusion in the inside of pixel injectd the layer, thereby avoided stress to concentrate near the support column, reach and promote the stress diffusivity of display panel under the external force impact, protect the purpose in pixel region.
In one embodiment, as shown in fig. 2 and 3, the support post slots 130 may or may not extend through the pixel defining layer 123; among the plurality of support post slits 130, a portion of the support post slits 130 may penetrate the pixel defining layer 123, and another portion of the support post slits 130 may not penetrate the pixel defining layer 123. Moreover, the surface of the side of the supporting column 140 away from the array substrate 110 is higher than the surface of the side of the pixel defining layer 123 away from the array substrate 110, that is, a part of the supporting column 140 is disposed in the pixel defining layer 123, and another part protrudes above the pixel defining layer 123. Specifically, referring to fig. 2, when the support post groove 130 penetrates the pixel defining layer 123, the depth of the support post groove 130 is greater than or equal to the thickness of the pixel defining layer 123; referring to fig. 3, when the support post trenches 130 do not penetrate the pixel defining layer 123, the depth of the support post trenches 130 is less than the thickness of the pixel defining layer 123. In both cases, the upper surface of the supporting pillars 140 is higher than the surface of the pixel defining layer 123, and at this time, when the display panel is subjected to a transient impact, the supporting pillars located inside the pixel defining layer 123 can release and disperse the stress in the pixel defining layer 123 through the sidewalls of the supporting pillar slots 130, and the supporting pillars 140 protruding from the surface of the pixel defining layer 123 can be used to support the cover plate and take the destructive effect of the stress, so as to protect the pixels 124 located near the supporting pillars 140 from being damaged.
In one embodiment, as shown in fig. 2 to 4, the display panel 100 further includes an electrode layer 122 disposed between the array substrate 110 and the pixel defining layer 123. The electrode layer 122 has a patterned structure, and the patterned structure of the electrode layer 122 includes a plurality of hollow areas. In the present embodiment, the supporting pillar slots 130 may be disposed above the electrode layer 122, or disposed on a hollow region of the patterned structure of the electrode layer 122. In particular, the electrode layer 122 may be an anode layer or a cathode layer, and in a top-emitting OLED structure, the electrode layer 122 may be an anode layer. As shown in fig. 4, in a position where the electrode layer 122 is not disposed, the depth of the support post slit 130 may exceed the thickness of the pixel defining layer 123; at the position where the electrode layer 122 is disposed, the depth of the supporting post slot 130 cannot exceed the thickness of the pixel defining layer 123, and the maximum depth of the supporting post slot 130 should be a buffer distance away from the electrode layer 122, so as to prevent the electrode layer 122 from being damaged by the accumulated stress.
In one embodiment, as shown in fig. 2, the display panel 100 further includes a planarization layer 121 disposed on a side of the pixel defining layer facing the array substrate, wherein the planarization layer 121 may belong to a layer structure in the array substrate or may be a layer structure additionally disposed on the array substrate. Wherein, the planarization layer 121 is formed with an extension groove 131 at a position corresponding to the support post slot 130, the support posts can be continuously disposed in the support post slot 130 and the extension groove 131, and further, the depth of the extension groove 131 can be smaller than the thickness of the planarization layer 121. In this embodiment, the total depth of the supporting post groove 130 and the extension groove 131 may be greater than the thickness of the pixel defining layer 123 and less than the total thickness of the planarization layer 121 and the pixel defining layer 123, and preferably, the depth of the extension groove 131 is preferably set from the position 1/3 to the position 1/2 on the planarization layer 121, and at this time, the supporting post 140 may better release the stress in the planarization layer 121 and the pixel defining layer 123 without affecting the array substrate 110 below. In another embodiment, the extension groove 131 may not be disposed in the planarization layer 121, and specifically, as shown in fig. 3, the depth of the support post groove 130 may not be greater than the thickness of the pixel defining layer 123, and preferably, the depth of the support post groove 130 is preferably disposed from the upper 1/3 position to the upper 2/3 position of the pixel defining layer 123, at which the support post 140 may release the stress in the pixel defining layer 123, and further, the depth of the support post groove 130 may be disposed at the interface position of the planarization layer 121 and the pixel defining layer 123 (i.e., the depth of the support post groove 130 is exactly equal to the thickness of the pixel defining layer 123), at which the support post 140 may release the stress in the pixel defining layer 123 and the layer gap.
In one embodiment, as shown in fig. 2, the supporting pillar 140 includes a bottom pillar 141 disposed in the planarization layer 121 and the pixel defining layer 123 and a top pillar 142 disposed on the pixel defining layer 123, wherein the bottom pillar 141 and the top pillar 142 are formed by one coating and exposing process, that is, the bottom pillar 141 and the top pillar 142 are integrally formed, and in addition, the shapes of the bottom pillar 141 and the top pillar 142 may be the same or different, and the specific shapes thereof may be specifically selected according to actual process conditions. This embodiment is through the structure that designs the foundation and the fore-set of support column as integrated into one piece, can make the supporting role of support column more firm, simultaneously, also makes the support column can bear stronger instantaneous impact force to protected to set up the pixel around the support column and can not receive the damage.
In one embodiment, the shape of the bottom pillar 141 of the support pillar may be cylindrical, square, rectangular parallelepiped, prismatic, and other relatively regular shapes. It will be appreciated that the support post slot 130 is shaped to interfit with the support post base 141. In the present embodiment, the bottom pillars 141 of the supporting pillars fill the supporting pillars 140 into the supporting pillar slots 130, so that stress can be transmitted into the planarization layer 121 and/or the pixel defining layer 123 through the sidewalls of the supporting pillar slots 130, and the stress accumulated on the supporting pillars 140 is effectively diffused, thereby protecting the light emitting devices near the supporting pillars 140 from being damaged.
In one embodiment, the shape of the top pillar 142 of the support pillar may be cylindrical, square, rectangular parallelepiped, prismatic, truncated cone, trapezoidal, and other shapes. In this embodiment, the top pillar 142 of the support pillar may have the same shape as or a different shape from the bottom pillar 141 of the support pillar. Specifically, as shown in fig. 5, the top pillar 142 of the supporting pillar may be a cylinder, a square, a rectangular parallelepiped, or a prism with the same upper and lower surfaces, or may be a circular truncated cone structure and a trapezoidal structure with a small upper part and a large lower part, or may be a circular truncated cone structure and an inverted trapezoidal structure with a large upper part and a small lower part.
In one embodiment, the area of the surface of the top pillar of the support pillar away from the array substrate is smaller than the area of the surface of the bottom pillar of the support pillar away from the array substrate. Specifically, the top column of the support column can be a round platform structure with a small top and a large bottom, a trapezoidal structure or other structures, the structure is favorable for keeping balance and supporting force of the support column, and the internal structure of the support column is more stable, so that the support column is not easy to break or collapse when being subjected to impact force which is instantaneously increased.
In one embodiment, the support posts, the pixel defining layer and the planarization layer are all made of an organic polymer material, and the material hardness of the support posts after curing is greater than the material hardness of the pixel defining layer and the planarization layer. Specifically, the support posts, the pixel defining layer and the planarization layer may be made of a material such as polyacrylate or polyimide (PSPI), but the specific materials for making the support posts, the pixel defining layer and the planarization layer are different. In this embodiment, the fabricated support posts are relatively stiff and can be used to resist transient surge stresses and transfer them down to the pixel definition layer and planarization layer; the manufactured pixel limiting layer and the manufactured planarization layer are relatively soft, and can assist the supporting columns to absorb and release stress accumulated on the supporting columns, so that the purpose of improving display failure is achieved.
An embodiment of the present invention further provides a display device, including: a display panel as claimed in any one of the preceding embodiments. Specifically, the display device can be any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator, an intelligent wearable device, and the like. The display panel has high stability, and is not easy to have display defects such as black spots, bright spots, color spots and the like when being impacted externally. Other essential components of the display device are all understood by those skilled in the art, and are not described herein.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A display panel, comprising: the array substrate and the organic light-emitting layer are arranged on the array substrate; the organic light emitting layer includes pixels, and pixel defining layers disposed between adjacent pixels; a supporting column is arranged on one side, away from the array substrate, of the pixel limiting layer; wherein a supporting column slot is formed on the pixel defining layer, the supporting column is arranged in the supporting column slot, at least part of the side wall of the supporting column is contacted with the side wall of the supporting column slot, and the surface of one side of the supporting column far away from the array substrate is higher than the surface of one side of the pixel defining layer far away from the array substrate;
the display panel further comprises a planarization layer arranged on one side of the pixel defining layer facing the array substrate, wherein extension grooves are formed in positions, corresponding to the support column grooves, of the planarization layer, the support columns are continuously arranged in the support column grooves and the extension grooves, and the depth of each extension groove is arranged from 1/3 to 1/2 positions on the planarization layer.
2. The display panel of claim 1 wherein the support post slots pass through or do not pass through the pixel defining layer.
3. The display panel of claim 1, further comprising an electrode layer disposed between the array substrate and the pixel defining layer, wherein the electrode layer has a patterned structure, and the supporting pillar grooves are disposed above the electrode layer or in a hollow area of the patterned structure of the electrode layer.
4. The display panel of claim 1, wherein the support posts comprise bottom posts disposed in the support post slots and top posts protruding above the pixel definition layer, and the bottom posts and the top posts are integrally formed.
5. The display panel according to claim 4, wherein the shape of the bottom pillar of the support pillar is one or more of a cylindrical shape, a square shape, a rectangular parallelepiped shape, and a prismatic shape; the shape of the supporting column slot is matched with that of the bottom column.
6. The display panel according to claim 5, wherein the top pillar of the support pillar has one or more of a cylindrical shape, a square shape, a rectangular parallelepiped shape, a prismatic shape, a truncated cone shape, and a trapezoidal shape.
7. The display panel of claim 5, wherein the top pillars have a smaller area on a surface away from the array substrate than on a surface away from the array substrate.
8. The display panel according to any one of claims 1 to 7, wherein the support columns have a hardness greater than that of the pixel defining layer.
9. A display device characterized in that it comprises a display panel according to any one of claims 1 to 8.
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| CN201810949207.1A CN109192756B (en) | 2018-08-20 | 2018-08-20 | Display panel and display device |
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| CN201810949207.1A CN109192756B (en) | 2018-08-20 | 2018-08-20 | Display panel and display device |
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| CN109192756B true CN109192756B (en) | 2021-04-23 |
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| CN109755287B (en) * | 2019-02-25 | 2021-12-28 | 武汉华星光电半导体显示技术有限公司 | Flexible OLED device and preparation method thereof |
| CN111312790B (en) * | 2020-02-28 | 2023-08-18 | 上海天马微电子有限公司 | Display panel, manufacturing method and flexible display device |
| CN113113460B (en) * | 2021-04-09 | 2022-08-30 | 武汉天马微电子有限公司 | Display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105810716A (en) * | 2016-04-01 | 2016-07-27 | 友达光电股份有限公司 | Flexible display device and fabrication method thereof |
| CN106920831A (en) * | 2017-03-28 | 2017-07-04 | 昆山国显光电有限公司 | Display device and electronic installation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810716A (en) * | 2016-04-01 | 2016-07-27 | 友达光电股份有限公司 | Flexible display device and fabrication method thereof |
| CN106920831A (en) * | 2017-03-28 | 2017-07-04 | 昆山国显光电有限公司 | Display device and electronic installation |
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