CN108777258B - Flexible organic light-emitting display panel and display device - Google Patents
Flexible organic light-emitting display panel and display device Download PDFInfo
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- CN108777258B CN108777258B CN201810539865.3A CN201810539865A CN108777258B CN 108777258 B CN108777258 B CN 108777258B CN 201810539865 A CN201810539865 A CN 201810539865A CN 108777258 B CN108777258 B CN 108777258B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
The invention discloses a flexible organic light-emitting display panel and a display device. The flexible organic light emitting display panel includes: a flexible substrate base plate; a thin-film transistor layer on the flexible substrate; an organic light emitting diode layer on the thin-film transistor layer; the packaging structure is positioned on the organic light-emitting diode layer; a barrier layer disposed on the flexible substrate and surrounding the organic light emitting diode layer; the barrier layer comprises a first barrier structure, a second barrier structure and a plurality of supplementary barrier structures, the first barrier structure is arranged around the organic light-emitting diode layer, the second barrier structure is arranged around the first barrier structure, a gap exists between the first barrier structure and the second barrier structure, and the supplementary barrier structures are arranged in the gap at intervals. The flexible organic light-emitting display panel can enhance the adhesive force between the film layers of the flexible organic light-emitting display panel and improve the stability of the flexible organic light-emitting display panel.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a flexible organic light-emitting display panel and a display device.
Background
The flexible organic light emitting display panel is a flexible display device, and has the advantages of convenience in carrying, bending, curling and the like, so that the flexible organic light emitting display panel is a hotspot for research and development in the current display technology.
An Organic Light-Emitting Diode (OLED) layer of an existing flexible Organic Light-Emitting display panel can be generally manufactured by an evaporation technology, wherein the evaporation technology is to perform electron beam bombardment heating, laser heating and the like on current in a vacuum environment to evaporate evaporated materials into atoms or molecules, and then to make the atoms or molecules move linearly to collide with the surface of a substrate to be condensed to form a thin film. However, since the adhesion of the organic light emitting diode layer formed by the evaporation technique is weak, the film layer is likely to fall off in the subsequent film tearing process of the flexible organic light emitting display panel.
Disclosure of Invention
The invention provides a flexible organic light-emitting display panel and a display device, which can enhance the adhesive force between film layers of the flexible organic light-emitting display panel and improve the stability of the flexible organic light-emitting display panel.
In a first aspect, an embodiment of the present invention provides a flexible organic light emitting display panel, including:
a flexible substrate base plate;
a thin-film transistor layer on the flexible substrate;
an organic light emitting diode layer on the thin-film transistor layer;
the packaging structure is positioned on the organic light-emitting diode layer;
a barrier layer disposed on the flexible substrate and surrounding the organic light emitting diode layer;
the barrier layer comprises a first barrier structure, a second barrier structure and a plurality of supplementary barrier structures, the first barrier structure is arranged around the organic light-emitting diode layer, the second barrier structure is arranged around the first barrier structure, a gap exists between the first barrier structure and the second barrier structure, and the supplementary barrier structures are arranged in the gap at intervals.
In a second aspect, embodiments of the present invention also provide a display device including a flexible organic light emitting display panel having any one of the features of the first aspect.
The invention provides a flexible organic light-emitting display panel and a display device, wherein a barrier layer is designed, and a plurality of supplementary barrier structures are additionally arranged in a gap between a first barrier structure and a second barrier structure, so that the contact area between a packaging structure and the barrier layer is increased, the adhesion between the packaging structure and a film layer below the packaging structure is enhanced, the organic light-emitting diode layer is not easy to fall off in the subsequent manufacturing process of the flexible organic light-emitting display panel after the evaporation step, and the stability of the flexible organic light-emitting display panel is improved.
Drawings
Fig. 1 is a schematic top view of a flexible organic light emitting display panel according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention;
fig. 3 is a schematic top view of a flexible organic light emitting display panel in the prior art;
fig. 4 is a schematic cross-sectional view of a flexible organic light emitting display panel in the prior art along the direction BB' in fig. 3;
fig. 5 is a schematic top view of another flexible organic light emitting display panel in the prior art;
fig. 6 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a thin-film transistor layer 11 according to an embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of a flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention;
fig. 9 is a schematic cross-sectional view of a flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention;
fig. 10 is a schematic cross-sectional view of a flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention;
fig. 11 is a schematic cross-sectional view of a flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention;
fig. 12 is a schematic top view of another flexible organic light emitting display panel according to an embodiment of the present invention;
fig. 13 is a schematic diagram of an exemplary rendering selected from a case where an orthographic projection of the supplemental barrier structure 142 on a plane of the flexible organic light emitting display panel is "rectangle, triangle, trapezoid, circle, ellipse, polygon, irregular shape";
fig. 14 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention;
fig. 15 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention;
fig. 16 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention;
fig. 17 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention;
fig. 18 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention;
fig. 19 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Also, the drawings and description of the embodiments are to be regarded as illustrative in nature, and not as restrictive. Like reference numerals refer to like elements throughout the specification. In addition, the thickness of some layers, films, panels, regions, etc. may be exaggerated in the drawings for understanding and ease of description. It will also be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. In addition, "on … …" means that an element is positioned on or under another element, but does not essentially mean that it is positioned on the upper side of the other element according to the direction of gravity. For ease of understanding, the figures of the present invention depict one element on top of another.
It should also be noted that references to "and/or" in embodiments of the invention are intended to include any and all combinations of one or more of the associated listed items. Various components are described in embodiments of the present invention with "first", "second", "third", and the like, but these components should not be limited by these terms. These terms are only used to distinguish one component from another. Also, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
While certain embodiments may be practiced differently, the specific process sequence may be performed differently than described. For example, two processes described consecutively may be performed at substantially the same time or in an order reverse to that described.
The embodiment of the invention provides a flexible organic light-emitting display panel and a display device, wherein a barrier layer is designed, and a plurality of supplementary barrier structures are additionally arranged in a gap between a first barrier structure and a second barrier structure, so that the contact area between a packaging structure and the barrier layer is increased, the adhesive force between the packaging structure and a film layer below the packaging structure is enhanced, the organic light-emitting diode layer is not easy to fall off in the subsequent manufacturing process (such as a film tearing process) of the flexible organic light-emitting display panel after an evaporation step, and the stability of the flexible organic light-emitting display panel is improved.
Hereinafter, the structure of the flexible organic light emitting display panel and technical effects thereof will be described in detail.
In the following embodiments, the flexible organic light emitting display panel is illustrated and exemplified as a rectangle, and in practical applications, the flexible organic light emitting display panel may also be in a regular or irregular shape such as a circle, a polygon, and the like, which is not limited in the embodiments of the present invention. Meanwhile, in order to more clearly describe a part of the structure in the flexible organic light emitting display panel, the following drawings of the embodiments of the present invention correspondingly adjust the size of each structure.
It should be further noted that, in the following drawings, an ellipsis "…" included in the embodiments of the present invention indicates that the flexible organic light emitting display panel extends in the left-right direction or the up-down direction, and the omitted portion may include other structures, which is not particularly limited by the embodiments of the present invention.
The embodiment of the invention provides a flexible organic light emitting display panel, which can be generally divided into a display area and a non-display area surrounding the display area, wherein the display area is an area of the flexible organic light emitting display panel used for displaying pictures and generally comprises a light emitting device. The non-display area surrounds the display area and generally comprises peripheral driving elements, peripheral routing lines and a fan-out area.
Fig. 1 is a schematic top view of a flexible organic light emitting display panel according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional view of a flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention. The flexible organic light emitting display panel includes: a flexible substrate 10, a thin-film transistor layer 11 on the flexible substrate 10; an organic light emitting diode layer 12 on the thin-film transistor layer 11; an encapsulation structure 13 on the organic light emitting diode layer 12; a barrier layer 14 disposed on the flexible substrate 10 and surrounding the organic light emitting diode layer 12.
As can be seen from fig. 1, the barrier layer 14 includes a first barrier structure 140, a second barrier structure 141, and a plurality of supplemental barrier structures 142, the first barrier structure 140 is disposed around the organic light emitting diode layer 13, the second barrier structure 141 is disposed around the first barrier structure 140, a gap exists between the first barrier structure 140 and the second barrier structure 141, and the plurality of supplemental barrier structures 142 are disposed at intervals in the gap.
Optionally, the plurality of supplemental blocking structures 142 may be uniformly spaced in the gap, or non-uniformly spaced in the gap, and the distribution of the plurality of supplemental blocking structures 142 in the gap may also be designed according to actual requirements, which is not specifically limited in this embodiment of the present invention. For example, fig. 1 is a drawing of an example in which a plurality of supplemental barrier structures 142 are uniformly spaced in a gap.
To facilitate understanding of the scheme of the flexible organic light emitting display panel provided in the embodiment of the present invention, fig. 3 is a schematic top view of a flexible organic light emitting display panel in the prior art, and fig. 4 is a schematic cross-sectional view of the flexible organic light emitting display panel in the prior art along the direction BB' in fig. 3. The flexible organic light emitting display panel includes: the flexible substrate comprises a flexible substrate 1 and a thin film transistor layer 2 positioned on the flexible substrate 1; an organic light emitting diode layer 3 on the thin-film transistor layer 2; an encapsulation structure 4 on the organic light emitting diode layer 3; a first barrier rib 5 disposed on the flexible substrate 1 and surrounding the organic light emitting diode layer 3; a second barrier column 6 provided on the flexible substrate 1 and surrounding the first barrier column 5; a gap exists between the first barrier post 5 and the second barrier post 6.
Fig. 5 is a schematic top view of another flexible organic light emitting display panel in the prior art, and it can be seen that, a gap between the first barrier pillar 5 and the second barrier pillar 6 is in a rectangular ring shape, and taking one side (the upper side) as an example, since the encapsulation structure 4 is in direct contact with the flexible substrate 1, a contact area between the encapsulation structure 4 and the flexible substrate 1 is shown as a dashed-line frame shaded portion in fig. 5. The area S of the hatched portion is d ═ l, where d is equal to the distance from the first barrier pillars 5 to the second barrier pillars 6, and l is the length over which the gap extends.
Fig. 6 is a schematic cross-sectional view of a flexible organic light emitting display panel along a direction CC' in fig. 1 according to an embodiment of the present invention. Similarly, the gap between the first barrier structure 140 and the second barrier structure 141 is rectangular and annular, and taking one side (the upper side) as an example, with the flexible organic light emitting display panel structure provided by the above embodiment of the present invention, because the barrier layer 14 is designed, and the plurality of supplemental barrier structures 142 are added in the gap between the first barrier structure 140 and the second barrier structure 141, the contact area between the encapsulation structure 13 and the barrier layer 14 and the flexible substrate 10 can be greatly increased. The contact area S' ═ d (l +2n × h) between the package structure 13 and the barrier layer 14 and the flexible substrate 10, where d is equal to the distance from the first barrier structure 140 to the second barrier structure 141, l is the length of the gap extension, n is the number of supplemental barrier structures 142 disposed on the gap, and h is the height of the supplemental barrier structures 142.
Therefore, under the condition that the distances from the first barrier structures 140 to the second barrier structures 141 are equal and the lengths of the gap extensions are equal, the contact area S' between the encapsulation structure 13, the barrier layer 14 and the flexible substrate 10 provided by the embodiment of the present invention is far larger than the contact area S between the existing encapsulation structure 4 and the flexible substrate 1, so that the adhesion between the encapsulation structure of the flexible organic light emitting display panel provided by the embodiment of the present invention and the film layer below the encapsulation structure is far larger than the adhesion between the encapsulation structure of the flexible organic light emitting display panel and the film layer below the encapsulation structure of the flexible organic light emitting display panel in the prior art. Therefore, the condition that the film layer of the organic light-emitting diode layer is easy to fall off in the subsequent manufacturing process (such as a film tearing process) of the flexible organic light-emitting display panel after the evaporation step is improved, and the stability of the flexible organic light-emitting display panel is improved.
Further, fig. 7 is a schematic cross-sectional structure diagram of a thin-film transistor layer 11 according to an embodiment of the invention. Thin-film-transistor layer 11 is located on flexible substrate 10. Taking a top-gate tft as an example, the tft layer 11 includes: a buffer layer 110 on the flexible substrate 10; an active layer 111 on the buffer layer 110; a gate insulating layer 112 on the active layer 111; a gate electrode 113 on the gate insulating layer 112; an interlayer insulating layer 114 on the gate electrode 113; a source electrode 115 and a drain electrode 116 on the interlayer insulating layer 114; a passivation layer 117 on the source and drain electrodes 115 and 116; an organic planarization layer 118 on the passivation layer 117.
Since the flexible substrate base 10 is stretchable, foldable, bendable, or rollable, the flexible organic light emitting display panel is also stretchable, foldable, bendable, or rollable. The flexible substrate 10 may be formed of any suitable insulating material having flexibility. The flexible substrate 10 serves to block oxygen and moisture, prevent moisture or impurities from diffusing through the flexible substrate 10, and provide a flat surface on the upper surface of the flexible substrate 10.
For example, the flexible substrate 10 may be formed of a polymer material such as Polyimide (PI), Polycarbonate (PC), Polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyarylate (PAR), or glass Fiber Reinforced Plastic (FRP), and may be transparent, translucent, or opaque.
The buffer layer 110 may cover the entire upper surface of the flexible substrate 10. For example, the buffer layer 110 may be formed of a material selected from an inorganic material such as silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SioxNy), aluminum oxide (AlOx), or aluminum nitride (AlNx), or a material selected from an organic material such as acryl, Polyimide (PI), or polyester. The buffer layer 110 may include a single layer or multiple layers. The buffer layer 110 may block impurities in the flexible substrate 10 from diffusing to other film layers.
The active layer 111 includes a source region and a drain region formed by doping N-type impurity ions or P-type impurity ions. The region between the source region and the drain region is the channel region.
The active layer 111 may be an amorphous silicon material, a polysilicon material, a metal oxide material, or the like. When the active layer 111 is made of a polysilicon material, a low-temperature amorphous silicon technique may be used, that is, the amorphous silicon material is melted by the laser to form a polysilicon material. In addition, it may be formed using various methods such as a Rapid Thermal Annealing (RTA) method, a Solid Phase Crystallization (SPC) method, an Excimer Laser Annealing (ELA) method, a Metal Induced Crystallization (MIC) method, a Metal Induced Lateral Crystallization (MILC) method, or a Sequential Lateral Solidification (SLS) method.
The gate insulating layer 112 includes an inorganic layer such as silicon oxide, silicon nitride, and may include a single layer or a plurality of layers. The gate electrode 113 is positioned on the gate insulating layer 112. The gate electrode 113 may include a single layer or a plurality of layers of gold (Au), silver (Ag), copper (Cu), nickel (Ni), platinum (Pt), palladium (Pd), aluminum (Al), Molybdenum (MO), or chromium (Cr), or a material such as aluminum (Al): neodymium (Nd) alloy and Molybdenum (MO) alloy, tungsten (W) alloy.
An interlayer insulating layer 114 is positioned on the gate electrode 113. The interlayer insulating layer 114 may be formed of an insulating inorganic layer of silicon oxide, silicon nitride, or the like. Alternatively, the interlayer insulating layer 114 may be formed of an insulating organic layer.
The source and drain electrodes 115 and 116 are positioned on the interlayer insulating layer 114. The source and drain electrodes 115 and 116 are electrically connected to the source and drain regions, respectively, through contact holes penetrating the gate insulating layer 112 and the interlayer insulating layer 114.
A passivation layer 117 is positioned on the source and drain electrodes 115 and 116. The passivation layer 117 may be formed of an inorganic layer of silicon oxide, silicon nitride, or the like, or an organic layer.
An organic planarization layer 118 is positioned on the passivation layer 117. The organic planarization layer 118 may be formed of an organic layer of acryl, Polyimide (PI), benzocyclobutene (BCB), or the like, and the organic planarization layer 118 has a planarization function.
The organic light emitting diode layer 12 includes: the pixel structure comprises a pixel limiting layer, a first electrode, a light-emitting function layer and a second electrode.
The encapsulation structure 13 is used to prevent moisture and oxygen in the environment from corroding the organic light emitting diode layer 12, and prolong the service life of the flexible organic light emitting display panel. The encapsulation structure 13 includes at least one organic layer and at least one inorganic layer. It should be noted that the number and the stacking order of the organic layer and the inorganic layer in the package structure 13 are not limited in the embodiment of the present invention.
Exemplarily, fig. 8 is a schematic cross-sectional view of a flexible organic light emitting display panel along the AA' direction in fig. 1 according to an embodiment of the present invention. The encapsulation structure 13 includes a first inorganic layer 130, a first organic layer 131, and a second inorganic layer 132 in a direction away from the flexible base substrate 10.
Wherein the first inorganic layer 130 and the second inorganic layer 132 cover the first barrier structure 140, the second barrier structure 141, and the plurality of supplemental barrier structures 142; the first organic layer 132 covers the first barrier structure 140. Thus, the first blocking structure 140 can avoid the extension effect of the organic film layer, and the second blocking structure 141 can avoid the extension effect of the inorganic film layer, which is beneficial to the narrow frame of the flexible organic light emitting display panel.
Alternatively, as shown in fig. 2, the first blocking structure 140 is connected with the supplementary blocking structure 142, and the second blocking structure 141 is connected with the supplementary blocking structure 142. Thus, the first blocking structure 140, the second blocking structure 141 and the supplemental blocking structure 142 can be formed by one-time composition, so that the manufacturing process is saved, and the manufacturing cost is reduced.
Still alternatively, fig. 9 is a schematic cross-sectional structure of the flexible organic light emitting display panel provided in the embodiment of the present invention along the direction AA' in fig. 1. Unlike the cross-sectional structure of the flexible organic light emitting display panel shown in fig. 2, the first barrier structure 140 is connected to the supplementary barrier structure 142, but the second barrier structure 141 is not connected to the supplementary barrier structure 142. As shown in fig. 9, a gap exists between the second barrier structure 141 and the supplemental barrier structure 142, so that the diffusion rate of water vapor in the flexible organic light emitting display panel can be reduced, the contact area between the package structure 13 and the barrier layer 14 and the flexible substrate 10 is further increased, and the adhesion between the package structure 13 and the film layer therebelow is improved.
Further alternatively, fig. 10 is a schematic cross-sectional view of the flexible organic light emitting display panel provided in the embodiment of the present invention, taken along the direction AA' in fig. 1. Unlike the cross-sectional structure of the flexible organic light emitting display panel shown in fig. 2, the first barrier structure 140 is not connected to the supplementary barrier structure 142, but the second barrier structure 141 is connected to the supplementary barrier structure 142. As shown in fig. 10, a gap exists between the first blocking structure 140 and the supplemental blocking structure 142, so that the diffusion speed of water vapor in the flexible organic light emitting display panel can be reduced, the contact area between the package structure 13 and the blocking layer 14 and the flexible substrate 10 is further increased, and the adhesion between the package structure 13 and the film layer below the package structure is improved.
Further, the thickness of supplemental barrier structure 142 is less than the thickness of first barrier structure 140, and the thickness of supplemental barrier structure 142 is less than the thickness of second barrier structure 141. This ensures that even if ink in ink-jet printing (IJP) overflows the first barrier structure 140, the ink will enter the groove formed between the first barrier structure 140, the second barrier structure 141 and the supplemental barrier structure 142 and will not overflow.
In order to simplify the manufacturing process of the flexible organic light emitting display panel, the barrier layer 14 (including the first barrier structure 140, the second barrier structure 141, and the supplemental barrier structure 142) is any one layer or a combination of multiple layers of the buffer layer 110, the interlayer insulating layer 114, the passivation layer 117, the organic planarization layer 118, the pixel defining layer, and the light emitting functional layer. And the thickness of the first barrier structure 140 and the thickness of the second barrier structure 141 are equal.
Illustratively, the barrier layer 14 is generally made of an organic material, and any one or a combination of a plurality of layers of the buffer layer 110, the interlayer insulating layer 114, the passivation layer 117, the organic planarization layer 118, the pixel defining layer, and the light emitting function layer may extend to the barrier layer 14.
Optionally, fig. 11 is a schematic cross-sectional view of the flexible organic light emitting display panel along the direction AA' in fig. 1 according to an embodiment of the present invention. Unlike the cross-sectional structure of the flexible oled display panel shown in fig. 2, the encapsulation structure 13 covers the edge of the second barrier structure 141 and then extends a distance away from the oled layer 12. Because the packaging structure 13 extends a distance to the outside of the second blocking structure 141, the contact area between the packaging structure 13 and the flexible substrate 10 is increased, the adhesive force between the packaging structure 13 and the flexible substrate 10 is enhanced, and the organic light-emitting diode layer is not easy to fall off in the subsequent manufacturing process (such as a film tearing process) of the flexible organic light-emitting display panel after the evaporation step, so that the stability of the flexible organic light-emitting display panel is improved.
Fig. 12 is a schematic top view of another flexible organic light emitting display panel according to an embodiment of the present invention. Taking the flexible organic light emitting display panel as an example of a rectangle, it can be seen that the gap between the first blocking structure 140 and the second blocking structure 141 is in a rectangular ring shape, and the gap includes a first gap 50 (a portion indicated by a dashed line frame in the figure) and a second gap 60 (a portion indicated by a dashed line frame in the figure), wherein the first gap 50 and the second gap 60 are perpendicular to each other. A plurality of supplemental barrier structures 142 may be spaced apart in the first gap 50, with no supplemental barrier structures 142 disposed within the second gap 60.
Optionally, referring to the actual production situation, the film layer is more likely to fall off on the long side of the flexible organic light emitting display panel, so that the first gap 50 is parallel to the long side of the flexible organic light emitting display panel, and the second gap 60 is parallel to the short side of the flexible organic light emitting display panel. Therefore, the adhesive force between the packaging structure near the long edge of the flexible organic light-emitting display panel and the film layer below the packaging structure can be increased, the condition that the film layer is easy to fall off on the organic light-emitting diode layer is improved, the wiring can be arranged at the short edge of the flexible organic light-emitting display panel, and the normal work of the flexible organic light-emitting display panel is guaranteed.
It should be noted that, the above-mentioned several embodiments of the present invention can be used in any combination, and the present invention is not particularly limited to this. For brevity, further description will not be provided herein.
For example, when patterning the barrier layer 14, the supplemental barrier structure 142 may have the following structure.
The orthographic projection of the supplementary barrier structure 142 on the plane of the flexible organic light emitting display panel is in any one or a combination of more of a rectangle, a triangle, a trapezoid, a circle, an ellipse, a polygon and an irregular shape. Exemplarily, as shown in fig. 13, fig. 13 is a schematic diagram of selecting a typical rendering from a case that an orthographic projection of the supplemental barrier structure 142 on a plane of the flexible organic light emitting display panel is "rectangle, triangle, trapezoid, circle, ellipse, polygon, irregular shape", in which an orthographic projection of the supplemental barrier structure 142 on a plane of the flexible organic light emitting display panel is a triangle for an example of a drawing description according to an embodiment of the present invention. Since the supplemental barrier structures 142 are independent of each other, the larger the surface area of the supplemental barrier structures 142, the larger the contact area between the package structure 13 and the supplemental barrier structures 142, and thus the greater the adhesion between the package structure 13 and the supplemental barrier structures 142.
Fig. 14 is a schematic cross-sectional view of the flexible organic light emitting display panel of fig. 1 along a direction CC' in fig. 14 according to an embodiment of the disclosure. The heights of the plurality of supplemental barrier structures 142 are sequentially increased in a direction in which the gap extends (taking a direction from right to left in the drawing as an example).
Fig. 15 is a schematic cross-sectional view of the flexible organic light emitting display panel according to the embodiment of the invention along a direction CC' in fig. 1. The heights of the plurality of supplemental barrier structures 142 decrease sequentially in a direction in which the gap extends (taking a direction from right to left in the drawing as an example).
As can be seen from fig. 14 and 15, the heights of the plurality of supplemental barrier structures 142 are sequentially increased or decreased along the direction in which the gap extends, so that there is a transition in the structural change of the film layer covering the gap by the encapsulation structure 13.
Fig. 16 is a schematic cross-sectional view of the flexible organic light emitting display panel according to the embodiment of the invention along a direction CC' in fig. 1. The height of one supplemental barrier structure 142 increases in sequence along the direction in which the gap extends (taking the direction from right to left in the drawing as an example).
Fig. 17 is a schematic cross-sectional view of the flexible organic light emitting display panel according to the embodiment of the invention along a direction CC' in fig. 1. The height of one supplemental barrier structure 142 decreases in order along the direction in which the gap extends (taking the direction from right to left in the drawing as an example).
As can be seen from fig. 16 and 17, along the direction in which the gap extends, the height of one supplemental barrier structure 142 is sequentially increased or decreased, so that there is a transition in the structural change of the film layer of the encapsulation structure 13 covering the supplemental barrier structure 142.
Fig. 18 is a schematic cross-sectional view of the flexible organic light emitting display panel according to the embodiment of the invention along a direction CC' in fig. 1. The supplemental barrier structure 142 includes a first supplemental barrier substructure 1420 and a second supplemental barrier substructure 1420, wherein the first supplemental barrier substructure 1420 and the second supplemental barrier substructure 1421 are alternately arranged along a direction in which the gap extends (taking a direction from right to left in the drawing as an example), and a height of the first supplemental barrier substructure 1420 is smaller than a height of the second supplemental barrier substructure 1421. This structure provides a transition in the structural change of the packaging structure 13 covering the layers of the first supplemental barrier substructure 1420 and the second supplemental barrier substructure 1421.
Fig. 19 is a schematic cross-sectional view of the flexible organic light emitting display panel of fig. 19 along a direction CC' in fig. 1 according to an embodiment of the disclosure. The supplemental barrier structure 142 comprises a first supplemental barrier substructure 1420, a second supplemental barrier substructure 1421 and a third supplemental barrier substructure 1422, wherein the first supplemental barrier substructure 1420, the second supplemental barrier substructure 1421 and the third supplemental barrier substructure 1422 are arranged in sequence along the direction in which the gap extends (taking the direction from right to left in the drawing as an example).
The first supplemental barrier substructure 1420 is a three-layer multiplexing structure, the second supplemental barrier substructure 1421 is a two-layer multiplexing structure, and the third supplemental barrier substructure 1422 is a single-layer structure; the three-layer multiplexing structure is obtained by multiplexing any three layers of a buffer layer, an interlayer insulating layer, a passivation layer, an organic planarization layer, a pixel limiting layer and a light-emitting function layer; the two-layer multiplexing structure is obtained by multiplexing any two layers of a buffer layer, an interlayer insulating layer, a passivation layer, an organic planarization layer, a pixel limiting layer and a light-emitting function layer; the single-layer structure is any one of a buffer layer, an interlayer insulating layer, a passivation layer, an organic planarization layer, a pixel defining layer and a light emitting function layer. Therefore, by multiplexing the buffer layer, the interlayer insulating layer, the passivation layer, the organic planarization layer, the pixel limiting layer and the light-emitting function layer, the manufacturing process can be simplified, materials can be saved, and the cost can be reduced.
The embodiment of the invention provides a flexible organic light-emitting display panel, wherein a barrier layer is designed, and a plurality of supplementary barrier structures are additionally arranged in a gap between a first barrier structure and a second barrier structure, so that the contact area between a packaging structure and the barrier layer is increased, the adhesion between the packaging structure and a film layer below the packaging structure is enhanced, the organic light-emitting diode layer is not easy to fall off in the subsequent manufacturing process of the flexible organic light-emitting display panel after the evaporation step, and the stability of the flexible organic light-emitting display panel is improved.
Embodiments of the present invention also provide a display device including a flexible organic light emitting display panel having any of the features described in the above embodiments.
The type of the display device may be any one of Organic Light-Emitting Diode (OLED) display devices, electronic paper, Quantum Dot Light Emitting Diode (QLED) display devices, micro LED (micro LED) display devices, and the like, which is not limited in particular.
An embodiment of the present invention further provides a method for manufacturing a flexible organic light emitting display panel, where the method is used to manufacture any one of the flexible organic light emitting display panels described in the above embodiments (fig. 11), and the method is different from a conventional method for manufacturing a flexible organic light emitting display panel in that:
when the traditional flexible organic light-emitting display panel is used for manufacturing the packaging structure, the edge of the packaging structure needs to be set by adopting a mask process once, so that the packaging structure just covers the edge of the second blocking structure. In the manufacturing method of the flexible organic light-emitting display panel provided by the embodiment of the invention, the edge of the packaging structure is not required to be set through a mask process, and the packaging structure and the groove are synchronously formed through one-time dry etching after the packaging structure is manufactured. According to the flexible organic light-emitting display panel formed by the method, after the packaging structure covers the edge of the second blocking structure, the packaging structure extends for a distance towards the direction away from the organic light-emitting diode layer, so that the contact area between the packaging structure and the flexible substrate is increased, the adhesive force between the packaging structure and the flexible substrate is enhanced, the organic light-emitting diode layer is not easy to fall off in the subsequent manufacturing process (such as a film tearing process) of the flexible organic light-emitting display panel after the evaporation step, and the stability of the flexible organic light-emitting display panel is improved.
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 changes, rearrangements 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 (13)
1. A flexible organic light emitting display panel, wherein the flexible organic light emitting display panel is rectangular, and the flexible organic light emitting display panel comprises:
a flexible substrate base plate;
a thin film transistor layer located on the flexible substrate;
an organic light emitting diode layer on the thin film transistor layer;
the packaging structure is positioned on the organic light-emitting diode layer;
the barrier layer is positioned on the flexible substrate and surrounds the organic light-emitting diode layer;
the barrier layer comprises a first barrier structure, a second barrier structure and a plurality of supplementary barrier structures, wherein the first barrier structure is arranged around the organic light-emitting diode layer, the second barrier structure is arranged around the first barrier structure, a gap exists between the first barrier structure and the second barrier structure, and the supplementary barrier structures are arranged in the gap at intervals;
the first blocking structure is connected with the supplementary blocking structure, and the second blocking structure is not connected with the supplementary blocking structure; or the second blocking structure is connected with the supplementary blocking structure, and the first blocking structure is not connected with the supplementary blocking structure;
the gaps include a first gap and a second gap, and the plurality of supplemental barrier structures are arranged in the first gap at intervals, wherein the first gap is perpendicular to the second gap, the first gap is parallel to a long side of the flexible organic light emitting display panel, and the second gap is parallel to a short side of the flexible organic light emitting display panel.
2. The flexible organic light emitting display panel of claim 1, wherein the encapsulation structure comprises at least one organic layer and at least one inorganic layer.
3. The flexible organic light emitting display panel of claim 2, wherein the encapsulation structure comprises a first inorganic layer, a first organic layer, and a second inorganic layer in a direction away from the flexible substrate;
wherein the first inorganic layer and the second inorganic layer cover the first barrier structure, the second barrier structure, and a plurality of the supplemental barrier structures;
the first organic layer covers the first barrier structure.
4. The flexible organic light emitting display panel of claim 1, wherein the supplemental barrier structure has a thickness less than a thickness of the first barrier structure and a thickness less than a thickness of the second barrier structure.
5. The flexible organic light emitting display panel of claim 1, wherein the thickness of the first barrier structure and the thickness of the second barrier structure are equal.
6. The flexible organic light emitting display panel of claim 1,
the thin-film transistor layer includes: a buffer layer on the flexible substrate; an active layer on the buffer layer; a gate insulating layer on the active layer; a gate electrode on the gate insulating layer; an interlayer insulating layer on the gate electrode; a source electrode and a drain electrode on the interlayer insulating layer; a passivation layer on the source electrode and the drain electrode; an organic planarization layer on the passivation layer;
the organic light emitting diode layer includes: the pixel structure comprises a pixel limiting layer, a first electrode, a light-emitting function layer and a second electrode.
7. The flexible organic light emitting display panel according to claim 6, wherein the barrier layer is any one or a combination of a plurality of layers selected from the group consisting of the buffer layer, the interlayer insulating layer, the passivation layer, the organic planarization layer, the pixel defining layer, and the light emitting functional layer.
8. The flexible organic light-emitting display panel according to claim 1, wherein an orthographic projection of the supplementary barrier structure on a plane of the flexible organic light-emitting display panel is in a shape of any one or a combination of more than one of rectangle, triangle, trapezoid, circle, ellipse, polygon and irregular shape.
9. The flexible organic light emitting display panel of claim 1, wherein the height of the plurality of supplemental barrier structures increases sequentially along the direction in which the gap extends; alternatively, the heights of the plurality of supplemental barrier structures are sequentially decreased.
10. The flexible organic light emitting display panel of claim 1, wherein the height of one of the supplemental barrier structures increases sequentially along the direction in which the gap extends; alternatively, the height of one of the supplemental barrier structures decreases in sequence.
11. The flexible organic light emitting display panel of claim 1, wherein the supplemental barrier structures comprise first and second supplemental barrier substructures, wherein the first and second supplemental barrier substructures alternate along a direction in which the gap extends, and wherein a height of the first supplemental barrier substructures is less than a height of the second supplemental barrier substructures.
12. The flexible organic light emitting display panel of claim 7, wherein the supplemental barrier structures comprise a first supplemental barrier substructure, a second supplemental barrier substructure, and a third supplemental barrier substructure, wherein the first supplemental barrier substructure, the second supplemental barrier substructure, and the third supplemental barrier substructure are arranged in sequence along a direction in which the gap extends;
the first supplementary barrier substructure is a three-layer multiplexing structure, the second supplementary barrier substructure is a two-layer multiplexing structure, and the third supplementary barrier substructure is a single-layer structure; the three-layer multiplexing structure is obtained by multiplexing any three layers of the buffer layer, the interlayer insulating layer, the passivation layer, the organic planarization layer, the pixel limiting layer and the light-emitting function layer; the two-layer multiplexing structure is obtained by multiplexing any two layers of the buffer layer, the interlayer insulating layer, the passivation layer, the organic planarization layer, the pixel limiting layer and the light-emitting function layer; the single-layer structure is any one of the buffer layer, the interlayer insulating layer, the passivation layer, the organic planarization layer, the pixel defining layer, and the light emitting function layer.
13. A display device comprising the flexible organic light emitting display panel according to any one of claims 1 to 12.
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| CN109920818B (en) | 2018-11-14 | 2021-09-10 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN110164916B (en) * | 2018-12-05 | 2021-02-02 | 京东方科技集团股份有限公司 | Display panel, display apparatus, and method of manufacturing display panel |
| CN110246879B (en) * | 2019-06-12 | 2021-12-24 | 武汉天马微电子有限公司 | Organic light-emitting display panel and device |
| CN110690226B (en) * | 2019-09-03 | 2021-06-01 | 武汉华星光电半导体显示技术有限公司 | Array substrate and display panel |
| CN114583077B (en) * | 2022-02-17 | 2023-08-04 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
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