CN110635067B - Organic light-emitting display panel and display device - Google Patents
Organic light-emitting display panel and display device Download PDFInfo
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- CN110635067B CN110635067B CN201910927795.3A CN201910927795A CN110635067B CN 110635067 B CN110635067 B CN 110635067B CN 201910927795 A CN201910927795 A CN 201910927795A CN 110635067 B CN110635067 B CN 110635067B
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- H10K50/00—Organic light-emitting devices
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
Abstract
The invention discloses an organic light-emitting display panel and a display device.A first pixel definition layer in an outermost annular retaining wall junction is arranged to at least cover the part of a first anode layer on the top surface, so that a slope angle can be prevented from being formed at the edges of the first pixel definition layer and the first anode layer close to a display area; therefore, the invention can reduce the probability of breaking the outermost inorganic layer in the TFE packaging layer by at least reducing the stress concentration part of the outermost retaining wall structure close to one side of the display area, thereby preventing external water vapor from entering the display area and prolonging the service life of the display device.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an organic light emitting display panel and a display device.
Background
Among flat panel Display panels, Organic Light Emitting Diode (OLED) Display panels have been widely regarded by people because of their advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright color, lightness and thinness, especially flexible OLED Display screens.
At present, a flexible OLED display generally adopts a Thin Film Encapsulation (TFE), and the thin film encapsulation includes an inorganic layer/organic layer/inorganic layer three-layer structure, and has the advantages of being light, thin, flexible and the like. Since the organic layer is formed by the IJP inkjet printing process, ink droplets may overflow to the border area, affecting the border, and usually, barriers (Dam) are disposed around the AA area to serve as barriers for inkjet printing the organic layer (IJP layer) in TFE. Dam is composed of several organic layers, however, the width of the lower organic layer is greater than that of the upper organic layer among the organic layers, and since the ductility of the inorganic layer is poor, the outermost inorganic layer (CVD) has a risk of fracture at the boundary of the organic layers, and if the number of organic layers is increased, the risk of fracture increases. Once the inorganic layer is broken, external water vapor enters the display screen along the organic channel, and the normal light emission of the display device is seriously influenced.
Disclosure of Invention
Embodiments of the present invention provide an organic light emitting display panel and a display device, so as to solve a problem in the prior art that an outermost inorganic layer of TFE is easily broken.
Therefore, an embodiment of the present invention provides an organic light emitting display panel, including a display region and a non-display region surrounding the display region, where at least one annular retaining wall structure surrounding the display region is provided on a substrate of the non-display region;
the annular retaining wall structure on the outermost side of the at least one annular retaining wall structure comprises: the first planarization layer, the first anode layer, the first pixel definition layer and the first support layer are sequentially stacked on the substrate; wherein the content of the first and second substances,
the first anode layer covers a part of the top surface of the first planarization layer on the side close to the display area, and the first pixel defining layer covers at least a part of the first anode layer on the top surface.
Optionally, in a specific implementation, in the organic light emitting display panel provided in this embodiment of the present invention, the first anode layer further covers an inner side surface of the first planarization layer on a side close to the display area, and the first pixel defining layer further covers a portion of the first anode layer on the inner side surface.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, an orthogonal projection of the first pixel defining layer on the substrate completely covers an orthogonal projection of the top surface of the first planarizing layer on the substrate.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, the first pixel defining layer further covers an outer side surface of the first planarizing layer on a side away from the display area.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, an inner annular wall structure of the at least one annular wall structure includes: the second anode layer, the second pixel defining layer and the second supporting layer are sequentially stacked on the substrate; wherein the content of the first and second substances,
the second anode layer and the first anode layer are arranged on the same layer and are connected with each other, the second pixel defining layer and the first pixel defining layer are arranged on the same layer and are mutually independent, and the second supporting layer and the first supporting layer are arranged on the same layer and are mutually independent.
Optionally, in practical implementation, in the above organic light emitting display panel provided in this embodiment of the present invention, the outermost barrier wall structure further includes a second planarization layer located between the substrate and the first planarization layer, and an orthogonal projection of the first planarization layer on the substrate completely covers an orthogonal projection of the second planarization layer on the substrate.
Optionally, in specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, the organic light emitting display panel further includes a first source-drain metal layer located between the substrate and the second planarizing layer, and a second source-drain metal layer located between the first planarizing layer and the second planarizing layer.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, an inner annular wall structure of the at least one annular wall structure includes: the third planarization layer, the second anode layer, the second pixel defining layer and the second supporting layer are sequentially stacked on the second source drain metal layer; wherein the content of the first and second substances,
the third planarization layer and the first planarization layer are arranged on the same layer and are mutually independent, the second anode layer and the first anode layer are arranged on the same layer and are mutually connected, the second pixel definition layer and the first pixel definition layer are arranged on the same layer and are mutually independent, and the second support layer and the first support layer are arranged on the same layer and are mutually independent;
the orthographic projection of the second pixel definition layer on the substrate completely covers the orthographic projection of the third planarization layer on the substrate.
Optionally, in a specific implementation manner, in the organic light emitting display panel provided in the embodiment of the present invention, an orthogonal projection of the first support layer on the substrate base plate covers an orthogonal projection of the top of the first pixel definition layer on the substrate base plate.
Correspondingly, the embodiment of the invention also provides a display device which comprises the organic light-emitting display panel.
The invention has the following beneficial effects:
according to the organic light-emitting display panel and the display device provided by the embodiment of the invention, the first pixel definition layer in the outermost annular barrier wall junction is arranged to at least cover the part of the first anode layer on the top surface, so that the formation of a slope angle at the edges of the first pixel definition layer and the first anode layer close to the display area can be avoided, once the slope angle is formed at the edges of the first pixel definition layer and the first anode layer, because the slope angle is a stress concentration part, when the outermost inorganic layer in the TFE packaging layer is deposited subsequently, the outermost inorganic layer is easy to break at the slope angle (the stress concentration part) due to the poor toughness of the inorganic layer; therefore, the invention can reduce the probability of breaking the outermost inorganic layer in the TFE packaging layer by at least reducing the stress concentration part of the outermost retaining wall structure close to one side of the display area, thereby preventing external water vapor from entering the display area and prolonging the service life of the display device.
Drawings
FIG. 1 is a schematic structural diagram of an organic light emitting display panel in the related art;
fig. 2 is a schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 3 is a second schematic structural diagram of an organic light emitting display panel according to an embodiment of the invention;
fig. 4 is a third schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;
fig. 5 is a fourth schematic structural diagram of an organic light emitting display panel according to an embodiment of the present invention;
FIG. 6 is a schematic top view illustrating the OLED panel shown in FIG. 5;
fig. 7 is a fifth schematic structural view of an organic light emitting display panel according to an embodiment of the invention;
fig. 8 is a schematic top view of the organic light emitting display panel shown in fig. 7.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of an organic light emitting display panel and a display device according to embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The thickness, size and shape of each layer of film in the drawings do not reflect the true scale of the organic light emitting display panel, and are only for the purpose of schematically illustrating the present invention.
In an organic light emitting display panel in the related art, as shown in fig. 1, two retaining wall structures (Dam1 and Dam2) are disposed on a substrate 1 in a non-display region, Dam1 is close to the display region, Dam2 is far from the display region, when a single-layer routing design is adopted for a source drain electrode layer 2, Dam1 includes an anode layer 3, a pixel defining layer 4 and a support layer 5 which are sequentially stacked, Dam2 includes a planarization layer 6, an anode layer 3, a pixel defining layer 4 and a support layer 5 which are sequentially stacked, for convenience of description, film layers with the same name in Dam1 and Dam2 are film layers disposed in the same layer, and the anode layer 3 in Dam1 and Dam2 is connected, and the pixel defining layer 4 and the support layer 5 are each independently disposed; since the width of the pixel defining layer 4 in Dam2 is smaller than the width of the planarization layer 6 and the pixel defining layer 4 does not completely cover the surface of the anode layer 3 on the top of the planarization layer 6, a slope angle a is formed at the junction of the pixel defining layer 4 and the first anode layer 3 and the planarization layer 6, where the slope angle a is a stress concentration point, when the outermost inorganic layer 7 in the TFE encapsulation layer is subsequently deposited, due to metal residue of the anode layer 3 caused by etching and poor toughness of the inorganic layer, cracks are easily generated at the PI junction (slope angle a position) of the inorganic layer 7, so that external water vapor enters the display area, which may have irreversible influence on the lighting and reliability of the product, and may reduce the lifetime of the device.
In view of the above, an embodiment of the present invention provides an organic light emitting display panel, as shown in fig. 2, including a display area AA and a non-display area BB surrounding the display area AA, where the embodiment of the present invention only illustrates a film layer of the non-display area BB, and at least one annular retaining wall structure surrounding the display area AA is disposed on a substrate 10 of the non-display area BB (the embodiment of the present invention is described by taking two annular retaining wall structures Dam1 and Dam2 as examples, Dam2 is an outermost annular retaining wall structure, and Dam1 is an inner annular retaining wall structure);
the outermost annular wall structure Dam2 of the at least one annular wall structure includes: a first planarizing layer 11, a first anode layer 12, a first pixel defining layer 13, and a first support layer 14, which are sequentially stacked on the base substrate 10; wherein the content of the first and second substances,
the first anode layer 12 covers a portion of the top surface of the first planarization layer 11 on the side close to the display area AA, and the first pixel defining layer 13 covers at least a portion of the first anode layer 12 on the top surface.
In the organic light emitting display panel provided in this embodiment of the present invention, the first pixel defining layer 13 in the outermost annular barrier Dam junction Dam2 is disposed to cover at least a portion of the top surface of the first anode layer 12 on the side of the first planarizing layer 11 close to the display area AA, so that a slope angle can be prevented from being formed at the edges of the first pixel defining layer 13 and the first anode layer 12 close to the display area AA, and once a slope angle is formed at the edges of the first pixel defining layer 13 and the first anode layer 12, since the slope angle is a stress concentration point, when an outermost inorganic layer in a TFE encapsulation layer is deposited subsequently, the outermost inorganic layer is prone to fracture at the slope angle (stress concentration point) due to poor toughness of the inorganic layer; therefore, the stress concentration of the outermost wall structure Dam2 close to one side of the display area AA is reduced, and compared with the slope angle formed by Dam2 on two sides in the related art, the probability of breaking of the outermost inorganic layer in the TFE packaging layer can be reduced to a certain extent, so that external water vapor is prevented from entering the display area, and the service life of a display device is prolonged.
In practical implementation, although the first pixel defining layer 13 in the outermost annular barrier rib Dam2 shown in fig. 2 is disposed to cover at least the portion of the first anode layer 12 on the top surface of the first planarizing layer 11 close to the display area AA, so as to avoid forming a slope angle on the side of the outermost annular barrier rib Dam2 close to the display area AA, in an actual manufacturing process, it may be difficult to make the first pixel defining layer 13 cover the portion of the first anode layer 12 on the top surface of the first planarizing layer 11 close to the display area AA, that is, it may be difficult to make the edge of the first pixel defining layer 13 close to the display area AA cover the edge of the first anode layer 12 on the top surface of the first planarizing layer 11 close to the display area AA, and it is easy to form a slope angle at the junction of the first pixel defining layer 13 and the first anode layer 12 close to the display area AA, therefore, in order to ensure that no slope angle is formed at the boundary between the first pixel defining layer 13 and the first anode layer 12 close to the display area AA, as shown in fig. 3, in the organic light emitting display panel provided in the embodiment of the present invention, the first anode layer 12 further covers the inner side surface of the first planarizing layer 11 close to the display area AA, and the first pixel defining layer 13 further covers the portion of the first anode layer 12 located at the inner side surface, so that it can be completely ensured that no slope angle is formed at the boundary between the first pixel defining layer 13 and the first anode layer 12 close to the display area AA, and the probability of fracture of the outermost inorganic layer in the TFE encapsulating layer manufactured subsequently is further reduced.
In practical implementation, the embodiment shown in fig. 2 and 3 provided by the present invention only solves the problem that the outermost inorganic layer of the TFE encapsulation layer is broken due to the slope angle formed at the side of the outermost annular Dam2 close to the display area AA, but a slope angle is also formed at the side of the outermost annular Dam2 away from the display area AA, therefore, in the above-mentioned organic light emitting display panel provided by the embodiment of the present invention, as shown in fig. 4, the orthographic projection of the first pixel defining layer 13 on the base substrate 10 completely covers the orthographic projection of the top surface of the first planarizing layer 11 on the base substrate 10, thus, at the side of the outermost annular barrier rib Dam2 away from the display area AA, the boundary between the first pixel defining layer 13 and the first planarizing layer 11 does not form a slope angle, therefore, the problem that the outermost inorganic layer of the TFE encapsulation layer is broken due to the slope angle formed at the side of the outermost annular Dam2 far away from the display area AA can be solved.
However, in practical implementation, although the orthographic projection of the first pixel defining layer 13 on the side of the outermost annular barrier rib Dam2 far from the display area AA in the substrate 10 shown in fig. 4 completely covers the orthographic projection of the top surface of the first planarizing layer 11 on the substrate 10, so as to avoid forming a slope angle on the side of the outermost annular barrier rib Dam2 far from the display area AA, in an actual manufacturing process, it may be difficult to make the first pixel defining layer 13 just cover the top surface of the first planarizing layer 11, that is, to make the edge of the first pixel defining layer 13 far from the display area AA just cover the edge of the top surface of the first planarizing layer 11 far from the display area AA, and to make a slope angle easily at the boundary of the first pixel defining layer 13 and the first planarizing layer 11 far from the display area AA, so as to ensure that no slope angle is formed at the boundary of the first pixel defining layer 13 and the first planarizing layer 11 far from the display area AA In the organic light emitting display panel provided in the embodiment of the invention, as shown in fig. 5, the first pixel defining layer 13 further covers an outer side surface of the first planarizing layer 11 on a side away from the display area AA, so that a slope angle is not formed at a boundary between the first pixel defining layer 13 and the first planarizing layer 11 on a side away from the display area AA, and the probability of fracture of an outermost inorganic layer in a TFE encapsulating layer manufactured subsequently is further reduced.
In specific implementation, because the annular retaining wall structures arranged in the non-display region are used for preventing the overflow of the organic layer material in the TFE encapsulation layer from affecting the frame, two independent annular retaining wall structures are generally arranged in the non-display region, and the height of the annular retaining wall structure close to the display region is lower than that of the annular retaining wall structure far away from the display region, so that the effect of blocking the overflow of the organic layer material is better; in specific implementation, the above embodiment describes the structure of the outermost annular retaining wall structure Dam2 far away from the display region, and now describes the inner annular retaining wall structure near the display region, and specifically, in the above organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 2 to fig. 5, the inner annular retaining wall structure Dam1 in at least one annular retaining wall structure includes: a second anode layer 21, a second pixel defining layer 22 and a second supporting layer 23 which are sequentially stacked on the base substrate 10; wherein the content of the first and second substances,
the second anode layer 21 and the first anode layer 12 are disposed on the same layer and are connected to each other, the second pixel defining layer 22 and the first pixel defining layer 13 are disposed on the same layer and are independent from each other, and the second supporting layer 23 and the first supporting layer 14 are disposed on the same layer and are independent from each other. Specifically, the second pixel defining layer 22 and the first pixel defining layer 13 are disposed in the same layer, that is, the pattern of the second pixel defining layer 22 and the pattern of the first pixel defining layer 13 are formed by the same material through the same patterning process, so that the manufacturing process of the organic light emitting display panel can be simplified, and the manufacturing cost of the organic light emitting display panel can be reduced; the second supporting layer 23 and the first supporting layer 14 are disposed in the same layer, that is, the pattern of the second supporting layer 23 and the pattern of the first supporting layer 14 are formed by the same material through the same patterning process, so that the manufacturing process of the organic light emitting display panel can be simplified, and the manufacturing cost of the organic light emitting display panel can be reduced.
Further, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 2 to 5, the organic light emitting display panel further includes a source/drain metal layer 30 located between the substrate 10 and the first planarization layer 11, and the source/drain metal layer 30 in fig. 2 to 5 adopts a single-layer routing design.
In further concrete implementation, in the above-mentioned organic light emitting display panel provided by the embodiment of the present invention, as shown in fig. 6, fig. 6 is a schematic top view structure of the organic light emitting display panel shown in fig. 5, and fig. 6 illustrates widths of orthographic projections of the film layers in Dam1 and Dam2 of fig. 5 on the substrate 10, it can be seen that, in Dam1, widths of orthographic projections of the second support layer 23 and the second pixel definition layer 22 on the substrate 10 are the same, in Dam2, widths of orthographic projections of the first support layer 14 and the first pixel definition layer 13 on the substrate 10 are the same, and a width of an orthographic projection of the first pixel definition layer 13 on the substrate 10 is greater than a width of an orthographic projection of the first planarization layer 11 on the substrate 10.
Further, in specific implementation, in the above-mentioned organic light-emitting display panel provided in the embodiment of the present invention, as shown in fig. 7, the outermost wall structure Dam2 further includes a second planarization layer 15 located between the base substrate 10 and the first planarization layer 11, and an orthographic projection of the first planarization layer 11 on the base substrate 10 completely covers an orthographic projection of the second planarization layer 15 on the base substrate 10. This can avoid the problem that the outermost inorganic layer of the TFE encapsulation layer to be manufactured later is broken at the position of the slope angle due to the slope angle formed at the boundary between the first planarization layer 11 and the second planarization layer 15.
Further, in specific implementation, as shown in fig. 7, the organic light emitting display panel provided in the embodiment of the present invention further includes a first source-drain metal layer 31 located between the substrate 10 and the second planarization layer 15, and a second source-drain metal layer 32 located between the first planarization layer 11 and the second planarization layer 15. In the organic light emitting display panel provided in the embodiment of the present invention, the source-drain metal layer in the organic light emitting display panel provided in fig. 7 adopts a double-layer routing design, that is, the organic light emitting display panel includes the first source-drain metal layer 31 and the second source-drain metal layer 32 which are stacked, so that the resistance can be reduced, and the performance of signal transmission can be improved; since the metal layers are electrically connected through the vias, a planarization layer needs to be formed after the metal layers are formed.
Further, in a specific implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 7, an inner annular wall structure Dam1 of the at least one annular wall structure includes: a third planarization layer 16, a second anode layer 21, a second pixel defining layer 22 and a second support layer 23 which are sequentially stacked on the second source-drain metal layer 32; wherein the content of the first and second substances,
the third planarization layer 16 and the first planarization layer 11 are disposed on the same layer and are independent from each other, the second anode layer 21 and the first anode layer 12 are disposed on the same layer and are connected to each other, the second pixel definition layer 22 and the first pixel definition layer 13 are disposed on the same layer and are independent from each other, and the second support layer 23 and the first support layer 14 are disposed on the same layer and are independent from each other; specifically, the third planarizing layer 16 and the first planarizing layer 11 are disposed on the same layer, that is, the pattern of the third planarizing layer 16 and the pattern of the first planarizing layer 11 are formed by the same material through the same patterning process, so that the manufacturing process of the organic light emitting display panel can be simplified, and the manufacturing cost of the organic light emitting display panel can be reduced; the second pixel defining layer 22 and the first pixel defining layer 13 are arranged in the same layer, that is, the graph of the second pixel defining layer 22 and the graph of the first pixel defining layer 13 are formed by the same material through the same composition process, so that the manufacturing process of the organic light emitting display panel can be simplified, and the manufacturing cost of the organic light emitting display panel can be reduced; the second supporting layer 23 and the first supporting layer 14 are arranged in the same layer, that is, the pattern of the second supporting layer 23 and the pattern of the first supporting layer 14 are formed by the same material through the same composition process, so that the manufacturing process of the organic light-emitting display panel can be simplified, and the manufacturing cost of the organic light-emitting display panel can be reduced;
the orthographic projection of the second pixel defining layer 22 on the substrate base 10 completely overlaps the orthographic projection of the third planarizing layer 16 on the substrate base 10. This can avoid the problem that the outermost inorganic layer of the TFE encapsulation layer to be manufactured later is broken at the position of the slope angle due to the slope angle formed at the boundary of the second pixel defining layer 22 and the third planarizing layer 16.
Further, in practical implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 2 to 7, an orthographic projection of the first support layer 14 on the substrate base plate 10 covers an orthographic projection of the top of the first pixel defining layer 13 on the substrate base plate 10, so that a slope angle can be prevented from being formed at a boundary between edges of the first support layer 14 and the first pixel defining layer 13, and a problem of fracture of an outermost inorganic layer in a TFE encapsulation layer can be prevented.
Further, in practical implementation, in the organic light emitting display panel provided in the embodiment of the present invention, as shown in fig. 2 to 7, an orthographic projection of the second support layer 23 on the substrate 10 covers an orthographic projection of the top of the second pixel defining layer 22 on the substrate 10, so that a slope angle can be avoided at a boundary between edges of the second support layer 23 and the second pixel defining layer 22, and a problem of fracture of an outermost inorganic layer in a TFE encapsulation layer can be prevented.
Further, in practical implementation, in the above-mentioned organic light emitting display panel provided by the embodiment of the present invention, as shown in fig. 8, fig. 8 is a schematic top view structure of the organic light emitting display panel shown in fig. 7, and fig. 8 illustrates the widths of the orthographic projections of the film layers in Dam1 and Dam2 of fig. 7 on the substrate 10, it can be seen that, in Dam1, the widths of the orthographic projections of the second support layer 23 and the second pixel definition layer 22 on the substrate 10 are the same, the width of the orthographic projection of the second pixel definition layer 22 on the substrate 10 is greater than the width of the orthographic projection of the third planarization layer 16 on the substrate 10, in Dam2, the widths of the orthographic projections of the first support layer 14 and the first pixel definition layer 13 on the substrate 10 are the same, the width of the orthographic projection of the first pixel definition layer 13 on the substrate 10 is greater than the width of the orthographic projection of the first planarization layer 11 on the substrate 10, the width of the orthographic projection of the first planarization layer 11 on the base substrate 10 is larger than the width of the orthographic projection of the second planarization layer 15 on the base substrate 10.
Further, the organic light emitting display panel provided by the embodiment of the invention is a flexible organic light emitting display panel. As shown in fig. 2 to 8, the materials of the other films except the metal layer in the inner side annular wall structure Dam1 and the outermost side annular wall structure Dam2 may be polyimide.
Further, in practical implementation, as shown in fig. 2 to 8, the organic light emitting display panel provided in the embodiment of the present invention further includes an inorganic layer 7 covering the inner annular wall structure Dam1 and the outermost annular wall structure Dam 2.
It should be noted that, the organic light emitting display panel provided in the embodiments of the present invention further includes other functional film layers, which are the same as those in the prior art and will not be described in detail herein.
Based on the same inventive concept, embodiments of the present invention further provide a display device, including any one of the organic light emitting display panels provided by embodiments of the present invention. The principle of the display device to solve the problem is similar to that of the organic light emitting display panel, so the implementation of the display device can be referred to the implementation of the organic light emitting display panel, and repeated details are not repeated herein.
In specific implementation, the display device provided in the embodiment of the present invention may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention.
According to the organic light-emitting display panel and the display device provided by the embodiment of the invention, the first pixel definition layer in the outermost annular barrier wall junction is arranged to at least cover the part of the first anode layer on the top surface, so that the formation of a slope angle at the edges of the first pixel definition layer and the first anode layer close to the display area can be avoided, once the slope angle is formed at the edges of the first pixel definition layer and the first anode layer, because the slope angle is a stress concentration part, when the outermost inorganic layer in the TFE packaging layer is deposited subsequently, the outermost inorganic layer is easy to break at the slope angle (the stress concentration part) due to the poor toughness of the inorganic layer; therefore, the invention can reduce the probability of breaking the outermost inorganic layer in the TFE packaging layer by at least reducing the stress concentration part of the outermost retaining wall structure close to one side of the display area, thereby preventing external water vapor from entering the display area and prolonging the service life of the display device.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. An organic light-emitting display panel is characterized by comprising a display area and a non-display area surrounding the display area, wherein at least one annular retaining wall structure surrounding the display area is arranged on a substrate of the non-display area;
the annular retaining wall structure on the outermost side of the at least one annular retaining wall structure comprises: the first planarization layer, the first anode layer, the first pixel definition layer and the first support layer are sequentially stacked on the substrate; wherein the content of the first and second substances,
the first anode layer covers part of the top surface of one side, close to the display area, of the first planarization layer and covers the inner side face of one side, close to the display area, of the first planarization layer, and the first pixel defining layer covers part, located on the top surface, of the first anode layer and covers part, located on the inner side face, of the first anode layer.
2. The organic light emitting display panel of claim 1, wherein an orthographic projection of the first pixel defining layer on the substrate base completely covers an orthographic projection of the top surface of the first planarizing layer on the substrate base.
3. The organic light-emitting display panel according to claim 2, wherein the first pixel defining layer further covers an outer side surface of the first planarizing layer on a side away from the display region.
4. The organic light emitting display panel according to any one of claims 1 to 3, wherein the inner annular wall structure among the at least one annular wall structure comprises: the second anode layer, the second pixel defining layer and the second supporting layer are sequentially stacked on the substrate; wherein the content of the first and second substances,
the second anode layer and the first anode layer are arranged on the same layer and are connected with each other, the second pixel defining layer and the first pixel defining layer are arranged on the same layer and are mutually independent, and the second supporting layer and the first supporting layer are arranged on the same layer and are mutually independent.
5. The organic light emitting display panel of claim 1, wherein the outermost annular bank structure further comprises a second planarization layer between the substrate base plate and the first planarization layer, an orthographic projection of the first planarization layer on the substrate base plate completely covers an orthographic projection of the second planarization layer on the substrate base plate.
6. The organic light-emitting display panel according to claim 5, further comprising a first source-drain metal layer between the substrate base plate and the second planarization layer, and a second source-drain metal layer between the first planarization layer and the second planarization layer.
7. The organic light emitting display panel of claim 6, wherein the inner annular wall structure of the at least one annular wall structure comprises: the third planarization layer, the second anode layer, the second pixel defining layer and the second supporting layer are sequentially stacked on the second source drain metal layer; wherein the content of the first and second substances,
the third planarization layer and the first planarization layer are arranged on the same layer and are mutually independent, the second anode layer and the first anode layer are arranged on the same layer and are mutually connected, the second pixel definition layer and the first pixel definition layer are arranged on the same layer and are mutually independent, and the second support layer and the first support layer are arranged on the same layer and are mutually independent;
the orthographic projection of the second pixel definition layer on the substrate completely covers the orthographic projection of the third planarization layer on the substrate.
8. The organic light emitting display panel of claim 1, wherein an orthographic projection of the first support layer on the base substrate overlaps an orthographic projection of a top of the first pixel defining layer on the base substrate.
9. A display device comprising the organic light-emitting display panel according to any one of claims 1 to 8.
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| CN111653589B (en) * | 2020-04-29 | 2021-12-03 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN111416063B (en) * | 2020-04-29 | 2022-05-31 | 武汉华星光电半导体显示技术有限公司 | Flexible OLED display panel and preparation method thereof |
| CN112018159B (en) * | 2020-08-27 | 2023-06-02 | 京东方科技集团股份有限公司 | Touch display panel |
| CN112289957B (en) * | 2020-10-28 | 2022-09-02 | 昆山国显光电有限公司 | Display panel and display device |
| CN113097417B (en) * | 2021-03-30 | 2023-04-18 | 云南创视界光电科技有限公司 | OLED display substrate and display device |
| CN116602072A (en) * | 2021-11-25 | 2023-08-15 | 京东方科技集团股份有限公司 | Display panel and display device |
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