CN108777266B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108777266B CN108777266B CN201810541614.9A CN201810541614A CN108777266B CN 108777266 B CN108777266 B CN 108777266B CN 201810541614 A CN201810541614 A CN 201810541614A CN 108777266 B CN108777266 B CN 108777266B
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- retaining wall
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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
- H10K50/844—Encapsulations
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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
Abstract
The embodiment of the invention discloses a display panel and a display device. The display panel includes: a substrate including a display region and a non-display region; an organic light emitting structure located in the display region of the substrate; the first retaining wall is positioned in the non-display area of the substrate and surrounds the display area; the thin film packaging layer covers the organic light-emitting structure; the thin film packaging layer comprises an organic layer, and the organic layer is positioned in the area surrounded by the first retaining wall; the first retaining wall comprises a first surface and a second surface which are oppositely arranged, the first surface is a surface of the first retaining wall far away from the display area, the second surface is a surface of the first retaining wall close to the display area, and the shape of the vertical projection of the first surface on the substrate is the same as the shape of the boundary of the display area; the first retaining wall comprises a first part, and a second surface of the first part is provided with a plurality of protruding parts in vertical projection on the substrate. The scheme of the embodiment of the invention realizes better connection of the boundary of the retaining wall and the organic layer in the thin film packaging layer, and improves the display effect of the display panel.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel and a display device.
Background
An Organic Light Emitting Diode (OLED) display is a self-luminous display, and compared with a Liquid Crystal Display (LCD), the OLED display does not need a backlight source, so that the OLED display is thinner and lighter, and has the advantages of high brightness, low power consumption, wide viewing angle, high response speed, wide use temperature range, and the like, and is increasingly applied to various high-performance display fields.
In the prior art, a thin film encapsulation method is often used to ensure that the organic light-emitting material and the electrode are not corroded by water vapor and oxygen in the external environment. Meanwhile, in order to avoid the increase of the inactive area around the device due to the extension effect of the thin film encapsulation layer, a retaining wall is often disposed around the organic light emitting structure in the prior art. However, the conventional retaining wall design cannot be well connected with the boundary of the organic layer in the thin film packaging layer, so that the organic layer in a partial area is easy to be lost, and the display effect is influenced.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for realizing better connection between a retaining wall and a boundary of an organic layer in a thin film packaging layer and improving the display effect of the display panel.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate including a display region and a non-display region;
an organic light emitting structure located in the display region of the substrate;
the first retaining wall is positioned in the non-display area of the substrate and surrounds the display area;
a thin film encapsulation layer covering the organic light emitting structure; the thin film packaging layer comprises an organic layer, and the organic layer is positioned in the area surrounded by the first retaining wall;
the first retaining wall comprises a first surface and a second surface which are oppositely arranged, the first surface is a surface of the first retaining wall far away from the display area, the second surface is a surface of the first retaining wall close to the display area, and the shape of the vertical projection of the first surface on the substrate is the same as the shape of the boundary of the display area; the first retaining wall comprises a first part, and a second surface of the first part is provided with a plurality of protruding parts in vertical projection of the substrate.
In a second aspect, an embodiment of the present invention further provides a display device, where the display device includes the display panel according to any embodiment of the present invention.
According to the embodiment of the invention, the first retaining wall comprises the first part, and the vertical projection of the second surface of the first part on the substrate is provided with the plurality of protruding parts, so that the shape of the first retaining wall can be better connected with the spreading boundary of the organic layer, and the situation that the partial area of the organic layer is thinner or lacks is avoided, and the overall performance of the display panel is influenced. And the shape of the first face through setting up first barricade at the vertical projection's of base plate shape is the same with the shape on the border of display area for the first face is the face of the comparatively simple regular shape of shape, has reduced the preparation degree of difficulty of first barricade, and the stress that first face received when display panel buckles is great, through setting up the first face into the face of regular shape, structural strength that can effectual reinforcing first face, produce the crackle when avoiding buckling and influence display panel and show.
Drawings
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the display panel of FIG. 1 along section line AA;
FIG. 3 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic top view of another display panel provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic top view of another display panel according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic top view of another display panel provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic top view of another display panel provided in accordance with an embodiment of the present invention;
FIG. 10 is a cross-sectional view of the display panel of FIG. 9 along section line BB;
fig. 11 is a schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship, the layer thicknesses of some parts are exaggerated in a drawing manner for easy understanding, and the layer thicknesses in the drawings do not represent the proportional relationship of the actual layer thicknesses.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, fig. 2 is a cross-sectional view of the display panel shown in fig. 1 along a section line AA, and the present embodiment provides a display panel, which includes, referring to fig. 1 and fig. 2:
a substrate 10 including a display region 110 and a non-display region 120;
an organic light emitting structure 20 positioned in the display region 110 of the substrate 10;
a first retaining wall 30 located in the non-display region 120 of the substrate 10 and surrounding the display region 110;
a thin film encapsulation layer 40, the thin film encapsulation layer 40 covering the organic light emitting structure 20; the thin film encapsulation layer 40 includes an organic layer 41, and the organic layer 41 is located in the region surrounded by the first retaining wall 30;
the first retaining wall 30 includes a first surface 31 and a second surface 32 that are oppositely disposed, the first surface 31 is a surface of the first retaining wall 30 away from the display area 110, the second surface 32 is a surface of the first retaining wall 30 adjacent to the display area 110, and a shape of a vertical projection of the first surface 31 on the substrate 10 is the same as a shape of a boundary of the display area 110; the first wall 30 includes a first portion 33 having a plurality of protrusions on a vertical projection of a second surface 32 of the first portion on a substrate.
The substrate 10 is an array substrate for driving the organic light emitting structure 20 to emit light, the substrate 10 includes a display area 110 and a non-display area 120, the display area 110 has the organic light emitting structure 20 correspondingly, so that a picture is displayed, and an area corresponding to the non-display area 120 does not display the picture. The array substrate includes a substrate, which may be flexible and may be formed of any suitable insulating material having flexibility. The substrate 10 may be transparent, translucent or opaque.
The organic light emitting structure 20 is formed on the substrate 10 within the display region 110 of the substrate 10, and the organic light emitting structure 20 generally includes an anode, a light emitting layer, and a cathode.
The thin film encapsulation layer 40 is positioned on the organic light emitting structure 20. The thin film encapsulation layer 40 protects the light emitting layer and other thin layers from external moisture, oxygen, and the like. The thin film encapsulation layer 40 may include an inorganic layer 42 and an organic layer 41, and the inorganic layer 42 and the organic layer 41 are alternately stacked. The first retaining wall 30 is disposed in the non-display region 120 of the substrate 10 and surrounds the display region 110, the first retaining wall 30 can serve as a stop layer for the organic layer 41 in the thin film encapsulation layer 40, and is covered by the inorganic layer 42 of the thin film encapsulation layer 40, and meanwhile, the first retaining wall 30 can further improve the water and oxygen blocking effect of the display panel, and prevent the crack of the inorganic layer from being transmitted and propagated.
Specifically, the organic layer 41 is formed by an inkjet printing process, and is gradually cured from a liquid state to a solid state, and the organic layer 41 has certain fluidity during the curing process. The first barriers 30 define the organic layer 41 in the region surrounded by the first barriers 30, so as to prevent the organic layer 41 from spreading and increasing the width of the non-display region 120. In the curing process of the organic layer 41, the boundary where the organic layer 41 spreads is not in a regular shape, and if the shape of the second surface 32 of the first retaining wall 30 is different from the shape of the boundary where the organic layer 41 spreads, so that the cut-off thickness of the organic layer 41 at the first retaining wall 30 is different, it may happen that the thickness of a partial region is small, that is, the organic layer 41 is thin, or the thickness is zero, that is, the organic layer 41 is absent, which affects the display effect of the display panel. In the embodiment, the first retaining wall 30 includes the first portion 33, and the second surface 32 of the first portion 33 has a plurality of protrusions in the vertical projection of the substrate, so that the shape of the first retaining wall 30 can be better connected with the spreading boundary of the organic layer 41, the stop thickness of the organic layer 41 at the first retaining wall 30 is more uniform, and the problem that the whole performance of the display panel is affected due to the fact that the organic layer 41 is partially thinner or missing is avoided. Because the boundary of the display area 110 is generally rectangular and in other regular shapes, the shape of the vertical projection of the first surface 31 of the first retaining wall 30 on the substrate 10 is the same as the shape of the boundary of the display area 110, so that the first surface 31 is a surface with a simpler regular shape, the difficulty in manufacturing the first retaining wall 30 is reduced, the stress on the first surface 31 is large when the display panel is bent, the structural strength of the first surface 31 can be effectively enhanced by setting the first surface 31 to be a surface with a regular shape, and the influence on the display of the display panel due to cracks generated when the display panel is bent is avoided.
It should be noted that the first portion 33 is a portion of the first retaining wall 30 corresponding to a region of the organic layer 41 where the deletion is likely to occur, and the first portion 33 may be a portion of the first retaining wall 30 or the entire first retaining wall 30.
Optionally, the display panel includes a bending region, and at least a portion of the first portion 33 is located in the bending region.
Specifically, the bending area of the display panel, that is, the area where the display panel is deformed, when the bending area is deformed, the organic layer 41 located in the bending area is deformed, and at this time, the thinner area and the missing area of the organic layer 41 can be peeled off, so that the missing area of the organic layer 41 is large, and display is affected. Through the bending area that sets up at least part of first portion 33 and be located display panel for can be better in the border linking with organic layer 41 of bending area first barricade 30, avoided display panel to buckle in-process organic layer 41 and produce the disappearance and influence and show, improved display panel's resistant bending performance.
Fig. 3 is a schematic top view of another display panel provided in an embodiment of the present invention, and fig. 4 is a schematic top view of another display panel provided in an embodiment of the present invention. Alternatively, referring to fig. 1, 3 and 4, the boundary of the display 110 area is shaped as a rectangle, a circular arc rectangle or a circle. Specifically, because the shape of the first surface 31 of the first retaining wall 30 in the vertical projection of the substrate 10 is the same as the shape of the boundary of the display area 110, when the shape of the boundary of the display area 110 is rectangular, circular arc rectangular or circular, the first surface 31 is a plane or a cylindrical surface with a simpler shape, the difficulty in manufacturing the first retaining wall 30 is reduced, and the stress on the first surface 31 is large when the display panel is bent, by setting the first surface 31 to be a plane or a cylindrical surface, the bending resistance of the first retaining wall 30 can be effectively enhanced, the first surface 31 of the first retaining wall 30 can be effectively prevented from generating cracks to affect the performance of the whole first retaining wall 31 when the display panel is bent, and the display of the display panel is affected.
Alternatively, referring to fig. 1 and 3, when the boundary of the display area 110 is rectangular, the first portion 33 is a portion of the first retaining wall 30 corresponding to two longer sides of the display area 110.
Specifically, because the two organic layers 41 with longer side length in the display area 110 have longer spreading boundaries, and the two longer side lengths in the display area 110 are usually the sides deformed by bending stress when the display panel is bent, the organic layers 41 are more likely to have missing or thinner areas at the boundaries, and the first portion 33 is the portion corresponding to the two longer side lengths in the display area 110, so that the first retaining wall 30 can be better connected with the boundaries of the organic layers 41, and the bending resistance and the display performance of the display panel are improved.
Alternatively, referring to fig. 4, the second surfaces 32 of all the first retaining walls 30 have a plurality of protrusions in the vertical projection of the base plate 10.
Specifically, when the display panel can be bent in various directions, each boundary of the organic layer 41 may be subjected to bending stress, and a large missing region of the organic layer 41 appears, and the second surface 32 of the first retaining wall 30 is provided with a plurality of protruding portions, so that the whole boundary of the organic layer 41 can be better connected with the first retaining wall 30, and the missing of the organic layer 41 can be more effectively avoided.
Fig. 5 is a schematic top view of another display panel provided in an embodiment of the present invention, and fig. 6 is a schematic top view of another display panel provided in an embodiment of the present invention. Alternatively, referring to fig. 1 and 3-6, the shape of the protrusion is triangular, trapezoidal, pentagonal, wavy, or semicircular.
Specifically, the shape of the second surface 32 of the first retaining wall 30 can be set according to the shape of the boundary of the organic layer 41, and the second surface 32 of the first retaining wall 30 can better adapt to different organic layers 41 spreading the boundary by setting the shape of the protruding portion to be triangular, trapezoidal, pentagonal, wavy or semicircular, so that the second surface 32 of the first retaining wall 30 can better engage with the boundary of the organic layer 41, and the display performance and the bending resistance of the display panel are improved.
It should be noted that the distance between the plurality of protruding portions may be zero or not, the same first retaining wall may also include protruding portions with various shapes, and the shape of the protruding portion may also be a combination of the above shapes.
Preferably, the second surface 32 of the first retaining wall 30 has a wave shape in vertical projection on the base plate 10. The conventional organic layer 41 is usually formed by an inkjet printing technology, and the second surface 32 of the first retaining wall 30 is in a wave shape in a vertical projection on the substrate 10, so that the wave shape can be better connected with a spreading boundary of the organic layer 41, and the display performance and the bending resistance of the display panel are improved.
Alternatively, referring to FIG. 6, the protrusion has a first dimension s1 along the extending direction of the first retaining wall 30, and the protrusion has a second dimension s2 along the direction perpendicular to the extending direction of the first retaining wall 30, wherein s1 ≧ s 2.
By such arrangement, the shape of the second surface 32 of the first retaining wall 30 better conforms to the shape of the boundary of the organic layer 41, and the second surface can be better connected with the boundary of the organic layer, so that the display performance and the bending resistance of the display panel are improved.
Optionally, referring to fig. 6, the maximum dimension of the first retaining wall 30 along the direction perpendicular to the extending direction of the first retaining wall 30 is S, and S2 is not more than S/2.
Specifically, the maximum dimension S is a dimension of the first retaining wall 30 at the protruding portion in a direction perpendicular to the extending direction of the first retaining wall 30. The region between two adjacent protruding portions is the recess district, the size of the first barricade in this recess district along the perpendicular direction of extending direction with first barricade 30 is S3, S2+ S3 for S, when second size S2 is too big, first barricade 30 is at the size S3 undersize in the recess district, can't guarantee first barricade 30' S structural strength, be less than or equal to S/2 through setting up S2, when guaranteeing that first barricade 30 has less width, guaranteed that first barricade has higher structural strength, and can be better link up with the boundary of organic layer 41, the resistant bending performance and the display performance of display panel have been improved.
Optionally, the value range of S is 7-25 μm.
Specifically, when S is too large, it is not favorable to reducing the frame width of the display panel, and when S is small, the structural strength of the first retaining wall 30 is low, and the effect of blocking the organic layer 41 cannot be well achieved, and by setting S to be 7-25 μm, the organic layer 41 can be better blocked while the display panel is ensured to have a small frame width, and the structural strength of the panel is improved.
Fig. 7 is a cross-sectional view of still another display panel according to an embodiment of the present invention, and optionally, referring to fig. 7, the thin film encapsulation layer 40 includes a first inorganic layer 421, a first organic layer 411, and a second inorganic layer 422, which are sequentially stacked; the first inorganic layer 421 is positioned on a side of the first organic layer 411 adjacent to the substrate 10.
Specifically, the first inorganic layer 421 and the second inorganic layer 422 are mainly used to prevent moisture and oxygen from entering the display panel to corrode the organic light emitting structure 20, and the first organic layer 411 mainly plays a role of buffering to reduce stress between the first inorganic layer 421 and the second inorganic layer 422. The film encapsulation layer 40 comprises three film layers, namely a first inorganic layer 421, a first organic layer 411 and a second inorganic layer 422, so that on one hand, water vapor and oxygen can be prevented from entering the display panel, on the other hand, the film encapsulation layer 40 has smaller thickness, and the development trend of light and thin display panel is met.
Optionally, the minimum thickness of the first organic layer 411 is d1, the distance from the surface of the first retaining wall 30 far away from the substrate 10 to the surface of the first organic layer 411 close to the substrate 10 is d2, and d1/d2 is greater than or equal to 2/3 and less than 1.
With such an arrangement, the first retaining wall 30 has a smaller height and can better block the first organic layer 411, which is in line with the development trend of light and thin display panels. The minimum thickness of the first organic layer 411 is the thickness of the joint of the first organic layer 411 and the first retaining wall 30.
Optionally, d1 is more than or equal to 2 μm. By the arrangement, the first organic layer 411 can coat particles below 2um, has better particle coating performance, and can meet the indexes of a common clean room with high cleanliness.
Alternatively, d1 ═ 2 μm and d2 ═ 3 μm. With such an arrangement, the first retaining wall 30 has a smaller height and can better block the first organic layer 411, which is in line with the development trend of light and thin display panels. In addition, the spreading area of the first organic layer 411 in the non-display area is not too large, so that the frame width of the display panel can be effectively reduced, and the development trend of the narrow frame of the display panel is met.
Fig. 8 is a schematic top view of another display panel according to an embodiment of the invention. Optionally, referring to fig. 8, the display panel further includes a second retaining wall 50, the second retaining wall 50 is disposed on a side of the first retaining wall 30 away from the display area 110, and the second retaining wall 50 surrounds the first retaining wall 30; the thin film encapsulation layer 40 is located in an area surrounded by the second barrier wall 50.
The second barrier 50 includes a third surface 51 and a fourth surface 52 disposed opposite to each other, the third surface 51 is a surface of the second barrier 50 away from the display area 110, the fourth surface 52 is a surface of the second barrier 50 adjacent to the display area 110, and a shape of a vertical projection of the third surface 51 and the fourth surface 52 on the substrate 10 is the same as a shape of a boundary of the display area 110.
Specifically, the second retaining wall 50 is used for blocking the inorganic layer of the thin film encapsulation layer 40 and supporting a mask used for manufacturing the inorganic layer. Because the second retaining wall 50 is closer to the outer boundary of the display panel, the stress that the second retaining wall 50 receives when the display panel is bent is larger, and the third surface 51 and the fourth surface 54 are both set to be the same as the shape of the boundary of the display area 110, i.e., both are flat planes or cylindrical surfaces, so that the second retaining wall 50 is not easy to crack under the action of larger bending stress, and the bending resistance of the display panel is improved.
Fig. 9 is a schematic top view of another display panel provided by an embodiment of the invention, and fig. 10 is a cross-sectional view of the display panel shown in fig. 9 along a section line BB. Optionally, referring to fig. 9 and 10, the display panel further includes a protective layer 60, the protective layer 60 is disposed on a side of the second retaining wall 50 away from the display area 110 and surrounds the display area 110, and a vertical projection of a fifth surface 61 of the protective layer 60 away from the display area and a sixth surface 62 of the protective layer 60 adjacent to the display area on the substrate 10 is the same as a shape of a boundary of the display area 110.
Specifically, when the display panel cracks due to bending force or the like, the protective layer 60 serves to prevent the cracks from spreading toward the display region 110. Because the protective layer 60 is closer to the outer boundary of the display panel, the fifth surface 61 and the sixth surface 62 are both set to be the same as the boundary of the display area 110, namely, are flat planes or cylindrical surfaces, so that the protective layer 60 is not easy to crack under the action of large bending stress, cracks can be prevented from being diffused better, and the bending resistance of the display panel is improved.
In addition, referring to fig. 10, the base plate 10 includes a base plate 11 and a Thin-Film Transistor (TFT) 12 on the base plate 11. The substrate 10 further comprises a passivation layer 13 and a planarization layer 14 on the TFT12, the planarization layer 14 being on a side of the passivation layer 13 remote from the TFT 12. The passivation layer 13 may be formed of an inorganic layer of silicon oxide, silicon nitride, or the like, or an organic layer. The planarization layer 14 includes an organic layer of acryl, Polyimide (PI), benzocyclobutene (BCB), or the like.
The organic light emitting structure 20 includes a first electrode 21, a light emitting layer 22, and a second electrode 23, and the first electrode 21 may be an anode and the second electrode 23 may be a cathode. The display panel further includes a pixel defining layer 70 on the substrate 10 covering an edge of the first electrode 21. In one embodiment, the pixel defining layer 70 around the edge of the first electrode 21 defines an emission area of each sub-pixel. The pixel defining layer 70 may be formed of an organic material such as Polyimide (PI), polyamide, benzocyclobutene (BCB), acryl resin, or phenol resin.
The first and second retaining walls 30 and 50 may be disposed on the passivation layer 13 and formed by stacking insulating layers such as the pixel defining layer 70, the planarization layer 14, and the support posts 80. The supporting columns 80 are used for supporting the mask during the manufacturing of the thin film encapsulation layer. The protective layer 60 is disposed on the substrate 11, and may be formed of an inorganic material, and the present embodiment is not particularly limited. The thin film encapsulation layer is not shown in fig. 10, and the present invention is not limited thereto.
Fig. 11 is a schematic diagram of a display device according to an embodiment of the invention, and referring to fig. 11, the display device 100 is a display panel 200 according to any embodiment of the invention. The display apparatus 100 may be an electronic device such as a mobile phone, a tablet computer, or the like.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (14)
1. A display panel, comprising:
a substrate including a display region and a non-display region;
an organic light emitting structure located in the display region of the substrate;
the first retaining wall is positioned in the non-display area of the substrate and surrounds the display area;
a thin film encapsulation layer covering the organic light emitting structure; the thin film packaging layer comprises an organic layer, and the organic layer is positioned in the area surrounded by the first retaining wall;
the first retaining wall comprises a first surface and a second surface which are oppositely arranged, the first surface is a surface of the first retaining wall far away from the display area, the second surface is a surface of the first retaining wall close to the display area, and the shape of the vertical projection of the first surface on the substrate is the same as the shape of the boundary of the display area; the first retaining wall comprises a first part, and a second surface of the first part is provided with a plurality of protruding parts in vertical projection of the substrate; the second surface of the first retaining wall defines a boundary of the organic layer;
the protruding part has a first size s1 along the extending direction of the first retaining wall, and the protruding part has a second size s2 along the direction perpendicular to the extending direction of the first retaining wall, wherein s1 is not less than s 2.
2. The display panel according to claim 1, characterized in that:
the display panel comprises a bending area, and at least part of the first part is positioned in the bending area.
3. The display panel according to claim 1, characterized in that:
the shape of the boundary of the display area is a rectangle, a circular arc rectangle or a circle.
4. The display panel according to claim 3, wherein:
when the shape of the boundary of the display area is rectangular, the first part is the part corresponding to the first retaining wall and the two longer sides of the side length of the display area.
5. The display panel according to claim 3, wherein:
the second surfaces of all the first retaining walls are provided with a plurality of protruding parts in the vertical projection of the base plate.
6. The display panel according to claim 1, characterized in that:
the shape of the protruding part is triangle, trapezoid, pentagon, wave or semicircle.
7. The display panel according to claim 1, characterized in that:
the maximum size of the first retaining wall in the direction perpendicular to the extending direction of the first retaining wall is S, and S2 is not more than S/2.
8. The display panel according to claim 7, wherein:
the value range of S is 7-25 μm.
9. The display panel according to claim 1, characterized in that:
the thin film packaging layer comprises a first inorganic layer, a first organic layer and a second inorganic layer which are sequentially stacked;
the first inorganic layer is located on a side of the first organic layer adjacent to the substrate.
10. The display panel according to claim 9, wherein:
the minimum thickness of the first organic layer is d1, the distance from the surface of the first retaining wall far away from the substrate to the surface of the first organic layer close to the substrate is d2, and d1/d2 is not less than 2/3 and is less than 1.
11. The display panel of claim 10, wherein d1 is greater than or equal to 2 μm.
12. The display panel according to claim 11, wherein d1 ═ 2 μm and d2 ═ 3 μm.
13. The display panel according to claim 1, further comprising:
the second retaining wall is arranged on one side, far away from the display area, of the first retaining wall, and surrounds the first retaining wall; the thin film packaging layer is positioned in the area surrounded by the second retaining wall;
the second retaining wall comprises a third surface and a fourth surface which are oppositely arranged, the third surface is a surface of the second retaining wall far away from the display area, the fourth surface is a surface of the second retaining wall close to the display area, and the shape of the vertical projection of the substrate of the third surface and the shape of the fourth surface are the same as the shape of the boundary of the display area.
14. A display device characterized by comprising the display panel according to any one of claims 1 to 13.
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|---|---|---|---|---|
| CN109346487B (en) * | 2018-11-28 | 2021-04-20 | 广州国显科技有限公司 | Display panel, display device and manufacturing method of display panel |
| CN109585690B (en) * | 2018-12-29 | 2021-03-16 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110190102A (en) * | 2019-05-29 | 2019-08-30 | 武汉华星光电半导体显示技术有限公司 | A kind of folding display panel and preparation method thereof |
| CN110379933B (en) | 2019-05-30 | 2021-12-10 | 京东方科技集团股份有限公司 | Display substrate and preparation process thereof |
| CN110265572A (en) * | 2019-06-12 | 2019-09-20 | 武汉华星光电半导体显示技术有限公司 | Display panel and display module |
| CN110350006B (en) | 2019-06-27 | 2021-06-01 | 武汉华星光电半导体显示技术有限公司 | Organic light emitting diode display device |
| CN113517410A (en) * | 2020-04-10 | 2021-10-19 | 华为技术有限公司 | Flexible display panel, display module and mobile terminal |
| CN113193137B (en) * | 2021-04-07 | 2022-05-31 | 深圳市华星光电半导体显示技术有限公司 | Display panel and manufacturing method of packaging structure of display panel |
| CN113838998A (en) * | 2021-09-24 | 2021-12-24 | 京东方科技集团股份有限公司 | Array substrate, preparation method thereof and display device |
| CN114613921A (en) * | 2022-03-01 | 2022-06-10 | 深圳市华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
| CN114613922B (en) * | 2022-03-11 | 2023-07-25 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN114843421B (en) * | 2022-04-21 | 2023-10-31 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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| JP2017147165A (en) * | 2016-02-19 | 2017-08-24 | 株式会社ジャパンディスプレイ | Display device |
| KR20180011924A (en) * | 2016-07-25 | 2018-02-05 | 삼성디스플레이 주식회사 | Display device |
| CN107170792A (en) * | 2017-07-24 | 2017-09-15 | 京东方科技集团股份有限公司 | Flexible oled display substrate and preparation method thereof and display device |
| CN107689425A (en) * | 2017-08-31 | 2018-02-13 | 昆山国显光电有限公司 | Thin-film packing structure and film encapsulation method and display panel |
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