Display panel and display device

Abstract

Provided are a display panel and a display device, which belong to the technical field of display. The display panel comprises a substrate, a pixel structure located in a display area of the substrate, and a barrier dam located in a non-display area of the substrate. The pixel structure comprises a pixel circuit layer, at least one planar layer, a black pixel defining layer, and a support layer which are stacked in sequence. The barrier dam comprises a plurality of barrier film layers, and the plurality of barrier film layers are located in the same layer as part of the planar layer and the support layer included in the pixel structure. That is, the barrier dam can be prepared by using the planar layer and the support layer which have good bending performance, and not prepared by using the black pixel defining layer which has poor bending performance. In this way, the problem that the black pixel defining layer cannot be used to prepare the barrier dam in a folding product due to poor bending performance can be solved. The barrier dam in the display panel provided by the present disclosure can be better applied to different types of display products.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, in particular to a display panel and a display device. BACKGROUND

[0002] With the development of display technology, at present, a dam is usually arranged in a non-display area of a substrate in a display panel to block external moisture from invading a display area of the substrate, so as to protect the display area.

[0003] In the related art, the dam located in the non-display area generally includes a plurality of planarization (PLN) layers, a pixel definition layer (PDL) and a photo spacer (PS) which are sequentially stacked in a direction away from the substrate. The photo spacer can also be referred to as a support layer. In a conventional display panel including a polarizer (POL), the PDL is a semi-transparent conventional PDL; in a non-conventional display panel without a polarizer, the PDL is a BPDL having a black property.

[0004] However, since the BPDL has poor bending performance compared with the conventional PDL, the current dam cannot be well applied to different types of display products. SUMMARY

[0005] A display panel and a display device are provided, which can solve the problem that the dam in the related art cannot be well applied to different types of display products. The technical solutions are as follows:

[0006] In one aspect, a display panel is provided, which includes:

[0007] a substrate having a display area and a non-display area at least partially surrounding the display area;

[0008] a plurality of pixel structures located on one side of the substrate and in the display area, the pixel structure including a pixel circuit layer, at least one planarization layer, a black pixel definition layer and a support layer which are sequentially stacked in a direction away from the substrate, the black pixel definition layer having a plurality of first openings arranged at intervals along a bearing surface parallel to the substrate, and the pixel structure further including a light emitting element located in each of the first openings;

[0009] and a plurality of dams located on one side of the substrate and in the non-display area, the plurality of dams being arranged at intervals in a direction away from the display area, and each of the dams including a plurality of dam film layers which are sequentially stacked in a direction away from the substrate; wherein the plurality of dam film layers are located in the same layer as part of the at least one planarization layer and the support layer.

[0010] Optionally, the width of the barrier dam close to the display area is smaller than the width of the barrier dam far from the display area, and / or the height of the barrier dam close to the display area is smaller than the height of the barrier dam far from the display area.

[0011] The width direction is parallel to the bearing surface of the substrate, and the height direction is perpendicular to the bearing surface of the substrate.

[0012] Optionally, the substrate further has a binding area located on the side of the non-display area far from the display area and abutting the non-display area.

[0013] The height of the first part close to the binding area is smaller than the height of the second part far from the binding area.

[0014] Optionally, the substrate is rectangular and has a first frame, a second frame, a third frame and a fourth frame.

[0015] The non-display area surrounds the display area, and each barrier dam of the non-display area surrounds the display area; the binding area is located on one side of the fourth frame.

[0016] The first part is located on one side of the fourth frame, the second part is located on one side of the first frame, the second frame, the third frame and the fourth frame, and the part of the second part located on one side of the fourth frame is outside the first part.

[0017] Optionally, the width of the plurality of layers of barrier films included in the first part and the width of the plurality of layers of barrier films included in the second part both decrease in turn along the direction close to the substrate; and in each adjacent two layers of barrier films, the orthogonal projection of the barrier film far from the substrate on the substrate covers the orthogonal projection of the barrier film close to the substrate on the substrate.

[0018] Optionally, the central axes of the plurality of layers of barrier films included in the first part are collinear, the central axes of the plurality of layers of barrier films included in the second part are collinear, and the central axes of the first part and the central axes of the second part are collinear.

[0019] Optionally, the number of barrier films included in the first part is smaller than the number of barrier films included in the second part.

[0020] Optionally, the plurality of layers of barrier films included in the first part belong to the plurality of layers of barrier films included in the second part.

[0021] Optionally, in a part of the plurality of barrier dams, the first part includes a barrier film layer far from the substrate which is the same as a barrier film layer far from the substrate included in the second part; in another part of the plurality of barrier dams, the first part includes a barrier film layer far from the substrate which is different from a barrier film layer far from the substrate included in the second part.

[0022] Optionally, if the width of the barrier film layer included in the first part and the width of the barrier film layer included in the second part are both sequentially reduced along the direction close to the substrate, and the barrier film layer included in the first part belongs to the barrier film layer included in the second part, for each of the another part of the plurality of barrier dams, the barrier dam further includes: a transition region between the first part and the second part.

[0023] In the transition region, the width of the target film layer included in the second part is transitionally widened to equal the width of the barrier dam, the target film layer is the barrier film layer far from the substrate included in the first part.

[0024] And the barrier film layer far from the substrate included in the second part covers the orthographic projection of the transition region on the substrate.

[0025] Optionally, in the transition region, for each side of the target film layer, the widening angle is the same and less than 90 degrees, and / or the widening width is the same.

[0026] Optionally, the display panel includes: a first barrier dam and a second barrier dam arranged at intervals in the direction away from the display area.

[0027] In the first barrier dam, the first part includes two barrier film layers, and the second part includes three barrier film layers.

[0028] In the second barrier dam, the first part includes two barrier film layers, and the second part includes four barrier film layers.

[0029] Optionally, the pixel structure includes a first planar layer, a second planar layer and a third planar layer stacked in sequence in the direction away from the substrate.

[0030] In the first barrier dam, the two barrier film layers included in the first part are located in the same layer as the second planar layer and the support layer, respectively, and the three barrier film layers included in the second part are located in the same layer as the second planar layer, the third planar layer and the support layer, respectively.

[0031] In the second barrier dam, the first portion includes two layers of barrier film layers, and the two layers of barrier film layers are located in the same layer as the first planar layer and the second planar layer respectively, and the second portion includes four layers of barrier film layers, and the four layers of barrier film layers are located in the same layer as the first planar layer, the second planar layer, the third planar layer and the support layer respectively. Optionally, the display panel further includes:

[0032] An encapsulation layer, a black matrix layer and a protection layer are located away from the substrate on a side of the black pixel defining layer, and are stacked in sequence away from the substrate, and the black matrix layer has a plurality of second openings corresponding to the plurality of first openings one by one;

[0033] And a filter layer is located in each of the second openings, and the color of the filter layer in each of the second openings is the same as the color of the light emitting element in the corresponding first opening.

[0034] On the other hand, a display device is provided, which includes a driving circuit and a display panel as described in the above aspect;

[0035] The driving circuit is electrically connected with the display panel and is configured to drive the display panel to emit light.

[0036] In summary, the technical solutions provided by the embodiments of the present disclosure can bring at least the following beneficial effects:

[0037] A display panel and a display device are provided. The display panel includes a substrate, a pixel structure located in a display area of the substrate, and a barrier dam located in a non-display area of the substrate. The pixel structure includes a pixel circuit layer, at least one planar layer, a black pixel defining layer, and a support layer stacked in sequence. The barrier dam includes a plurality of layers of barrier film layers, and the plurality of layers of barrier film layers are located in the same layer as part of the planar layers and the support layer included in the pixel structure. That is, the barrier dam can be prepared using the planar layer and the support layer with good bending performance, rather than the black pixel defining layer with poor bending performance. In this way, the problem that the black pixel defining layer with poor bending performance cannot be used to prepare the barrier dam in a folding product can be solved. The barrier dam in the display panel provided by the present disclosure can be better applied to different types of display products. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0039] Figure 1is a structural schematic diagram of a display panel provided by an embodiment of the present disclosure;

[0040] Figure 2 is a cross-sectional view of a display panel provided by an embodiment of the present disclosure;

[0041] Figure 3 is a structural schematic diagram of another display panel provided by an embodiment of the present disclosure;

[0042] Figure 4 is a structural schematic diagram of yet another display panel provided by an embodiment of the present disclosure;

[0043] Figure 5 is a structural schematic diagram of another display panel provided by an embodiment of the present disclosure;

[0044] Figure 6 is a top view of a barrier dam in a display panel provided by an embodiment of the present disclosure;

[0045] Figure 7 is a cross-sectional view of a barrier dam in a display panel provided by an embodiment of the present disclosure;

[0046] Figure 8 is an enlarged top view of a barrier dam in a display panel provided by an embodiment of the present disclosure;

[0047] Figure 9 is a structural schematic diagram of a display device provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0049] Non-traditional display panels without polarizers (POL-Less), such as COE display panels that integrate color filters in encapsulation layers (COE), are currently prepared by two masks to respectively prepare black pixel definition layers BPDL and support layers PS, in contrast to traditional display panels with polarizers that are prepared by one mask to prepare pixel definition layers PDL and support layers PS with light transmission performance, in consideration of improving the optical performance of products. Furthermore, COE display panels also include a planarization layer PLN located on the side of the anode of the light-emitting element close to the substrate, in contrast to traditional display panels with polarizers, which is mainly used to improve the planarity of the anode, thereby further indirectly improving the optical performance of the display panel.

[0050] Wherein, since the black pixel defining layer BPDL adds carbon black additive in the base material, the bending performance and adhesion of the black pixel defining layer BPDL are poorer than those of the traditional pixel defining layer PDL. In the COE folding product, the bending performance of the material is very important, so according to the background technology, the setting of the black pixel defining layer BPDL will lead to the failure to continue to reliably form the barrier dam Dam. That is, the characteristics of the black pixel defining layer BPDL make it no longer suitable for the design of the barrier dam Dam.

[0051] Therefore, the display panel provided by the embodiments of the present disclosure can be applied to different types of display products.

[0052] Figure 1 is a structural schematic diagram of a display panel provided by the embodiments of the present disclosure. As Figure 1 indicated, the display panel comprises:

[0053] a substrate 01, the substrate 01 has a display area AA and a non-display area BB surrounding at least part of the display area AA. For example, referring to Figure 1 , the non-display area BB surrounds the display area AA in the substrate 01 shown. Of course, in some other embodiments, the non-display area BB can also partially surround the display area AA, for example, the non-display area BB can be adjacent to the display area AA and located on the left side of the display area AA. Of course, the non-display area BB is not limited to being located on the left side of the display area AA, for example, it can also be located on the upper side of the display area AA.

[0054] It should be noted that the area of the display area AA is generally much larger than the area of the non-display area BB, and the drawings are only schematic illustrations and do not limit the areas of the display area AA and the non-display area BB.

[0055] Continuing to refer to Figure 1 , the display panel recorded in the embodiments of the present disclosure further comprises: a plurality of pixel structures 02 located on one side of the substrate 01 and in the display area AA. And a plurality of barrier dams (Dam) 03 located on one side of the substrate 01 and in the non-display area BB. The plurality of barrier dams 03 are arranged in a spaced manner away from the display area AA. The plurality of barrier dams 03 can act as a barrier wall for subsequent packaging, achieving protection of the display area AA.

[0056] Based on the structure shown in Figure 1 , Figure 2 , a cross-sectional view of a display panel in the kk' direction is shown. Referring to Figure 2It can be seen that the pixel structure 02 comprises, in sequence from the substrate 01, a pixel circuit layer 021, at least one planar layer (PLN) 022, a black pixel defining layer (BPDL) 023, and a support layer (PS) 024. The black pixel defining layer 023 has a plurality of first openings K1 arranged in parallel to the bearing surface of the substrate 01, and the pixel structure 02 further comprises a light emitting element L1 in each first opening K1. That is, the light emitting elements L1 in different first openings K1 can be spaced by the black pixel defining layer 023. It should be noted that, Figure 2 Only one first opening K1 is schematically shown. Furthermore, Figure 2 Only three planar layers 022 are schematically shown, which are respectively identified as PLN1, PLN2 and PLN3.

[0057] Continuing to refer to Figure 2 It can also be seen that each barrier dam 03 comprises, in sequence from the substrate 01, a plurality of barrier film layers 031. The plurality of barrier film layers 031 are in the same layer as part of the plurality of planar layers 022 and the support layer 024.

[0058] It should be noted that being in the same layer means that the layers are formed by the same film forming process and then patterned by the same patterning process using the same mask. According to different patterns, the patterning process comprises multiple times of exposure, development or etching, and the pattern in the formed layer structure can be continuous or discontinuous. That is, the elements, components, structures and / or parts in the same layer are formed by the same material and the same patterning process. In this way, the manufacturing process and cost can be saved, and the manufacturing efficiency can be improved.

[0059] That is, in the embodiments of the present disclosure, each barrier dam 03 can comprise a plurality of barrier film layers 031 formed by part of the plurality of planar layers 022 and the support layer 024. In addition, it should be noted that each barrier dam 03 can comprise different barrier film layers 031. Since the materials of the planar layers 022 and the support layer 024 are generally organic materials, the barrier film layers 031 of the barrier dam 03 can also be referred to as organic film layers.

[0060] For example, referring to Figure 2The barrier dam 03 shown comprises four barrier film layers 031, which are located in the same layer as the three planarization layers 022 (PLN1, PLN2, and PLN3) and the support layer 024 included in the pixel structure 02. That is, the barrier dam 03 comprises three planarization layers 022 and one support layer 024. In some embodiments, other barrier dams 03 may include three barrier film layers 031, located in the same layer as the three planarization layers 022, or located in the same layer as two planarization layers 022 and one support layer 024. This is merely an illustrative illustration of the same-layer relationship and does not limit the choice of film layers.

[0061] Because the blocking film layer 031 included in the blocking dam 03 described in this embodiment is located in the same layer as a portion of the film layers in the planarization layer 022 and the support layer 024, but not in the same layer as the black pixel defining layer 023, that is, the blocking dam 03 is not prepared using a pixel defining layer, the problem that the black pixel defining layer 023 is unsuitable for preparing the blocking dam 03 in foldable products due to its poor bending performance can be solved. In other words, the blocking dam 03 provided in this embodiment can be applied to various display products, whether foldable or non-foldable, and is not limited by the material of the pixel defining layer.

[0062] In summary, this disclosure provides a display panel. The display panel includes a substrate, a pixel structure located in a display area of ​​the substrate, and a barrier dam located in a non-display area of ​​the substrate. The pixel structure includes a pixel circuit layer, at least one planarization layer, a black pixel defining layer, and a support layer, stacked sequentially. The barrier dam includes multiple barrier film layers, and these multiple barrier film layers are located in the same layer as some of the film layers in the planarization layer and support layer included in the pixel structure. That is, the barrier dam can be fabricated using the planarization layer and support layer, which have better bending performance, instead of using the black pixel defining layer, which has poor bending performance. This solves the problem that the black pixel defining layer's poor bending performance makes it unsuitable for fabricating barrier dams in foldable products. The barrier dam in the display panel provided by this disclosure is well applicable to different types of display products.

[0063] exist Figure 2 On this basis, Figure 3 A cross-sectional view of another display panel is shown. (As shown) Figure 3 As shown, the display panel described in this embodiment may further include: an encapsulation layer 025, a black matrix layer (BM) 026, and an overcoat (OC) layer 027, which are located on the side of the black pixel defining layer 023 away from the substrate 01 and are stacked sequentially in a direction away from the substrate 01. Figure 3The support layer 024 is not shown. Optionally, the encapsulation layer 025 can be a thin film encapsulation (TFE) layer, i.e., thin film encapsulation can be adopted. The material of the protective layer OC can be an organic material, i.e., the protective layer OC can be an organic protective layer.

[0064] The black matrix layer 026 can have a plurality of second openings K2 corresponding to the plurality of first openings K1. That is, the plurality of second openings K2 can also be arranged at intervals along the direction X1 parallel to the bearing surface of the substrate 01. Figure 3 Only one second opening K2 corresponding to one first opening K1 is shown schematically.

[0065] In addition, the display panel can further include a filter layer 028 in each second opening K2. That is, the filter layers 028 in different second openings K2 can be spaced by the black matrix layer 026. Optionally, the filter layer 028 can include a color filter (CF). Of course, in some other embodiments, the filter layer 028 can also include color resistance, which is not limited in the embodiments of the present disclosure.

[0066] In addition, in the embodiments of the present disclosure, the color of the filter layer 028 in each second opening K2 can be the same as the color of the light emitting element L1 in the corresponding first opening K1. For example, if the light emitting element L1 in a first opening K1 is a red light emitting element L1, the filter layer 028 in the second opening K2 corresponding to the first opening K1 can also be red.

[0067] In addition, optionally, in the embodiments of the present disclosure, the colors of the light emitting elements L1 in adjacent first openings K1 can be different, and accordingly, the colors of the filter layers 028 in adjacent second openings K2 can also be different. Here, the color of the light emitting element L1 can refer to the color of the light emitted by the light emitting element L1. For example, the display panel can include a plurality of red light emitting elements, a plurality of green light emitting elements and a plurality of blue light emitting elements, i.e., three colors of light emitting elements, and each adjacent three first openings K1 can be sequentially provided with a red light emitting element, a green light emitting element and a blue light emitting element. Of course, in some other embodiments, the colors of the light emitting elements L1 in adjacent first openings K1 can also be the same, and the arrangement manner of the plurality of light emitting elements L1 is not limited in the embodiments of the present disclosure.

[0068] In the embodiments of the present disclosure, the pixel circuit formed by the pixel circuit layer 021 can be electrically connected with the light emitting element L1 through the via hole penetrating through the multi-layered planar layer 022, and used to drive the light emitting element L1 to emit light. For example, if the light emitting element L1 is an organic light emitting diode (OLED), the pixel circuit can transmit a driving current to the light emitting element L1, so as to drive the light emitting element L1 to emit light. The light emitted by the light emitting element L1 can be filtered by the filter layer 028 and then emitted, so that the display panel can display a picture. Since no polarizer is needed, the display panel can be the COE panel described in the above embodiments.

[0069] Further, with continued reference to Figure 3 It can also be seen that the light emitting element L1 in the embodiments of the present disclosure can include an anode Anode and an electroluminescence (EL) layer EL stacked in sequence in a direction away from the substrate 01. The pixel circuit formed by the pixel circuit layer 021 being electrically connected with the light emitting element L1 can mean that the pixel circuit is electrically connected with the anode Anode included in the light emitting element L1. Of course, the light emitting element L1 can generally also include a cathode Cathode (not shown in the figure) located on the side of the electroluminescence layer EL away from the substrate 01. The pixel circuit formed by the pixel circuit layer 021 can transmit a light emitting driving signal to the anode Anode included in the light emitting element L1, and the cathode Cathode included in the light emitting element L1 can be electrically connected with a power supply end and receive a power signal transmitted by the power supply end. The electroluminescence layer EL included in the light emitting element L1 can emit light under the pressure difference between the light emitting driving signal received by the anode Anode and the power signal received by the cathode Cathode.

[0070] For example, as shown in the structure of FIG. 9, Figure 2 and Figure 3 For example, as shown in the structure of FIG. 9, Figure 4 FIG. 10 shows another structure of a display panel. With reference to Figure 4 It can be seen that the pixel circuit layer 021 can include an active layer Ac, a gate metal layer Gate and a source-drain metal layer SD stacked in sequence in a direction away from the substrate 01.

[0071] Optionally, Figure 4 FIG. 10 shows two transistors formed by the pixel circuit layer 021, including an N-type transistor and a P-type transistor. The material of the active layer of the P-type transistor can include a low-temperature polysilicon material. The material of the active layer of the N-type transistor can include an oxide material. In the figure, the active layer Ac of the P-type transistor is identified as Ac-L, and the active layer Ac of the N-type transistor is identified as Ac-O. The active layer Ac-O is farther away from the substrate 01 than the active layer Ac-L.

[0072] In addition, referring to Figure 4 It can also be seen that the pixel circuit shown includes three gate metal layers Gate1, Gate2 and Gate3 stacked in sequence in a direction away from the substrate 01. The source-drain metal layer SD includes two source-drain metal layers SD1 and SD2 stacked in sequence in a direction away from the substrate 01. In addition, the pixel circuit also includes three planar layers PLN1, PLN2 and PLN3 stacked in sequence in a direction away from the substrate 01.

[0073] Among them, the planar layer PLN1 is located between the source-drain metal layer SD1 and the source-drain metal layer SD2, and the source-drain metal layer SD2 is located between the planar layer PLN1 and the planar layer PLN2. And the source-drain metal layer SD2 is overlapped with the source-drain metal layer SD1 through the via hole penetrating the planar layer PLN1. The anode Anode of the light emitting element L1 is overlapped with the source-drain metal layer SD2 through the via hole penetrating the planar layer PLN3 and the planar layer PLN2, thereby indirectly overlapping with the source-drain metal layer SD1, so as to realize the electrical connection between the pixel circuit and the light emitting element L1.

[0074] In addition, referring to Figure 4 It can also be seen that the display panel can further include: a light shielding layer LS and three buffer layers (identified as Buffer-S, Buffer-1 and Buffer-2 respectively) located between the substrate 01 and the active layer Ac-L and stacked in sequence in a direction away from the substrate 01. A gate insulating layer (GI) GI1 located between the active layer Ac-L and the gate metal layer Gate1. A gate insulating layer GI2 located between the gate metal layer Gate1 and the gate metal layer Gate2. A buffer layer Buffer-O located between the gate metal layer Gate2 and the active layer Ac-O. A gate insulating layer GI3 located between the active layer Ac-O and the gate metal layer Gate3. And an interlevel dielectric (ILD) located between the gate metal layer Gate3 and the source-drain metal layer SD1. And the source-drain metal layer SD1 is also overlapped with the film layers such as the light shielding layer LS, the active layer Ac-L, the active layer Ac-O, the gate metal layer Gate1 and the gate metal layer Gate2. The gate metal layer Gate1 and the gate metal layer Gate2 overlapped with the source-drain metal layer SD1 are used to form a storage capacitor Cst in the pixel circuit. And the substrate 01 can include a base PI1, a barrier layer Barrier1, a base PI2 and a barrier layer Barrier2 stacked in sequence in a direction close to the light shielding layer LS.

[0075] Optionally, the base PI1 and the base PI2 can be flexible substrates, and the material of the flexible substrate can include polymide (PI). Of course, in some other embodiments, the substrate 01 can also be a non-flexible substrate, such as glass. The material of the barrier layer Barrier1, the barrier layer Barrier2, the buffer layer, and the interlayer dielectric layer ILD can include silicon oxide (SiO2) or silicon nitride (SiNx). In addition, the material of the planarization layer PLN can include polymide PI. It should be noted that the examples of the materials herein are only illustrative.

[0076] Optionally, in the plurality of barrier dams 03 according to the embodiments of the present disclosure, the width of the barrier dam 03 closest to the display area AA can be smaller than the width of the barrier dam 03 farthest from the display area AA, and / or the height of the barrier dam 03 closest to the display area AA can be smaller than the height of the barrier dam 03 farthest from the display area AA. Here, the closest to the display area AA and the farthest from the display area AA refer to. The following embodiments are the same, and will not be described one by one.

[0077] For example, if two barrier dams 03 are included, the barrier dam 03 closest to the display area AA and the barrier dam 03 farthest from the display area AA refer to the two barrier dams 03, respectively. If more than three barrier dams 03 are included, for each barrier dam 03 between the barrier dam 03 closest to the display area AA and the barrier dam 03 farthest from the display area AA, the width thereof can be equal to, smaller than, or greater than the width of the barrier dam 03 closest to the display area AA or the width of the barrier dam 03 farthest from the display area AA, and the thickness is the same, which will not be described again. That is, the embodiments of the present disclosure do not limit the width and height of each barrier dam 03 between the barrier dam 03 closest to the display area AA and the barrier dam 03 farthest from the display area AA. Of course, in some other embodiments, the width of the barrier dam 03 closest to the display area AA can also be greater than the width of the barrier dam 03 farthest from the display area AA, and the height of the barrier dam 03 closest to the display area AA can also be greater than the height of the barrier dam 03 farthest from the display area AA.

[0078] It should be noted that the width direction according to the embodiments of the present disclosure can be parallel to the bearing surface of the substrate 01, and the height direction can be perpendicular to the bearing surface of the substrate 01. The following embodiments will not be described one by one.

[0079] For example, Figure 5 is another structure diagram of a display panel provided by the embodiments of the present disclosure. The display panel shown therein includes two barrier dams 03, i.e., a first barrier dam 03 and a second barrier dam 03, arranged at intervals in a direction away from the display area AA. To distinguish, the barrier dam 03 closest to the display area AA is identified as Dam1, and the barrier dam 03 farthest from the display area AA is identified as Dam2.

[0080] On the basis of Figure 5 the above,Figure 6 A top view of the first barrier dam Dam1 and the second barrier dam Dam2 is shown. Figure 5 A top view of the first barrier dam Dam1 and the second barrier dam Dam2 is shown. Figure 7 A top view of the first barrier dam Dam1 and the second barrier dam Dam2 is shown. Figure 6 A top view of the first barrier dam Dam1 and the second barrier dam Dam2 is shown. Figure 8 A top view of the first barrier dam Dam1 and the second barrier dam Dam2 is shown. Figure 6 A top view of the first barrier dam Dam1 and the second barrier dam Dam2 is shown.

[0081] In combination with Figure 5 And Figure 7 It can be seen that the width d1 of the first barrier dam Dam1 shown can be 30 microns (μm), and the width d2 of the second barrier dam Dam2 can be 40 μm. Of course, the width here is only illustrative, and the width of each barrier dam 03 can generally be between 30 μm and 40 μm. The maximum height h1 of the first barrier dam Dam1 can be 4.4 μm, and the maximum height h2 of the second barrier dam Dam2 can be 6 μm. Of course, the height here is also only illustrative.

[0082] Optionally, in combination with Figure 5 It can be seen that the plurality of barrier dams 03 surrounding one side of the display area AA can be concentric, i.e., the plurality of barrier dams 03 can be equally spaced and surrounded on one side of the display area AA. In other words, the spacing between each adjacent two barrier dams 03 can be a fixed spacing. In this way, the blocking reliability can be improved.

[0083] Optionally, in combination with Figure 5 It can be seen that the substrate 01 described in the embodiments of the present disclosure can also have a binding area CC located away from the display area AA on one side of the non-display area BB and abutting the non-display area BB.

[0084] Among each barrier dam 03, the height of the first part 03-1 close to the binding area CC can be less than the height of the second part 03-2 away from the binding area.

[0085] For example, in combination with Figure 5 The substrate 01 shown is rectangular, i.e., the substrate 01 can have a first border 01a, a second border 01b, a third border 01c, and a fourth border 01d. Figure 5In the diagram, the first border 01a refers to the left border, the second border 01b refers to the top border, the third border 01c refers to the right border, and the fourth border 01d refers to the bottom border. This is merely an illustrative illustration of the border positions and does not limit the specific positions of each border. For example, in some other embodiments, the first border 01a may also refer to the right border, and the third border 01c may refer to the left border. Similarly, this is also merely an illustrative illustration of the shape of the substrate 01 and does not limit the shape of the substrate 01. For example, in some other embodiments, the substrate 01 may also have other shapes, such as a trapezoid.

[0086] exist Figure 5 Based on this, and then combined Figure 1 In this embodiment of the disclosure, the non-display area BB can surround the display area AA, and the binding area CC can be located on one side of the fourth border 01d. That is, the binding area CC can be located... Figure 5 The bottom border of the rectangular substrate 01 is shown. Furthermore, each barrier dam 03 located in the non-display area BB can surround the display area AA. Based on this, it can be seen that in each barrier dam 03, the first portion 03-1 can be located on one side of the fourth border 01d, and the second portion 03-2 can be located on one side of the first border 01a, second border 01b, third border 01c, and fourth border 01d, with the portion of the second portion 03-2 located on the fourth border 01d outside the first portion 03-1. That is, the first portion 03-1 can be located on the side where the bottom border is located, most of the second portion 03-2 can be located on the left, right, and top border sides, and a small portion can be located on the side where the bottom border is located, and this small portion located on the side where the bottom border is located connects to the first portion 03-1 located only on the side where the bottom border is located, without overlapping. In other words, the first portion 03-1 located on the side where the bottom border is located is closer to the bonding area CC than the second portion 03-2 located on the side where the bottom border is located. Since only a small portion of the second part 03-2 is located on the side where the bottom border is located, the following embodiments will be described using the example of the second part 03-2 being located on the left, right, and top borders. Furthermore, in each barrier dam 03, the height of the portion located on the side where the bottom border is located can be less than the height of the portions located on the left, right, and top borders.

[0087] It should be noted that, in combination Figure 5 and Figure 6 It can be seen that, Figure 6 What is shown is Figure 5 A top view of the first and second barrier dams Dam1 and Dam2 within the area zz' on the left side of the lower middle border. Figure 5 The right side of the lower middle border is symmetrical to the left zz' area. The design of the first barrier dam Dam1 and the second barrier dam Dam2 is similar and will not be repeated.

[0088] It should also be noted that the reference Figure 5It can be seen that the binding area CC can be provided with flexible printed circuit (FPC) and integrated circuit (IC). The pixel structure 02 can be electrically connected with the circuit in the binding area CC through signal lines to receive driving signals. The signal lines can be flexible multi-layer on cell (FMLOC) flexible multi-layer cell metal signal lines. It can be known accordingly that the FMLOC in the binding area CC needs to cross the blocking dam Dam in the adjacent non-display area BB to extend to the display area AA. Thus, by setting the height of the first part 03-1 of the blocking dam 03 close to the binding area CC to be smaller than the height of the second part 03-2 away from the binding area, the crossing of the lines can be facilitated. Generally, the height of the first part 03-1 will not exceed 4 μm. The FMLOC is a kind of metal signal line in a touch display integrated structure display device. The touch display integrated structure display device generally includes a touch structure and a display panel. The FPC can be electrically connected with the touch structure and the display panel to control the touch structure to realize touch function and control the display panel to display images.

[0089] For example, continuing to combine Figure 5 and Figure 7 It can be seen that the height h1-1 of the first part 03-1 of the first blocking dam Dam1 shown can be 2.8 μm, and the height h1-2 of the second part 03-2 can be 4.4 μm. The height h2-1 of the first part 03-1 of the second blocking dam Dam2 can be 3.2 μm, and the height h2-2 of the second part 03-2 can be 6 μm. It can also be seen from this example that the height of any part of the first blocking dam Dam1 close to the display area AA can be smaller than the height of any part of the second blocking dam Dam2 away from the display area AA.

[0090] Optionally, in combination with Figure 6 and Figure 7It can be seen that in each barrier dam 03 described in this embodiment, the width d2 of the multilayer barrier film layers 031 included in the first part 03-1 and the multilayer barrier film layers 031 included in the second part 03-2 can both decrease sequentially along the direction closer to the substrate 01. Furthermore, in every two adjacent barrier film layers 031, the orthographic projection of the barrier film layer 031 farther from the substrate 01 onto the substrate 01 can cover the orthographic projection of the barrier film layer 031 closer to the substrate 01 onto the substrate 01. That is, a top-over-bottom barrier film design can be adopted. Based on this, it can be understood that the width of the barrier film layer 031 furthest from the substrate 01 (i.e., the uppermost barrier film layer 031) among the multilayer barrier film layers 031 included in the barrier dam 03 is the width of the barrier dam 03. By adopting a top-over-bottom film design, the slope of the formed barrier dam 03 can be prevented from being too large, which is beneficial to the uniformity of subsequent film formation on the side of the barrier dam 03 furthest from the substrate 01.

[0091] Optional, see reference Figure 6 It can also be seen that in each barrier dam 03 (e.g., barrier dams Dam1 and Dam2), the central axes of the multiple barrier membrane layers 031 included in the first part 03-1 can be collinear, and the central axes of the multiple barrier membrane layers 031 included in the second part 03-2 can be collinear. Furthermore, the central axis x1 of the first part 03-1 and the central axis of the second part 03-2 can be collinear. The central axis is uniformly labeled x1 in the figure. This ensures that the spacing between adjacent sides of any two adjacent barrier membrane layers 031 is equal, facilitating layout design.

[0092] It should be noted that the central axis here refers to the central axis of the portion of the barrier 03 located on one side of each frame, and does not include the portion of the barrier 03 located on the other side. Figure 5 The portion at the corner of substrate 01 shown. Figure 5 The corners shown include: the corner between the top and left borders, the corner between the top and right borders, the corner between the bottom and left borders, and the corner between the bottom and right borders. Furthermore, each corner can be... Figure 5 The rounded corners shown are, of course, in some other embodiments, the corners may also be right angles or other shapes. This disclosure does not limit the shape of the corners.

[0093] Optionally, in this embodiment of the disclosure, in each barrier dam 03, the number of barrier membrane layers 031 included in the first portion 03-1 may be less than the number of barrier membrane layers 031 included in the second portion 03-2. This ensures that the height of the first portion 03-1 is reliably less than the height of the second portion 03-2. Of course, in some other embodiments, the number of barrier membrane layers 031 may be equal, and the height of the first portion 03-1 may be less than the height of the second portion 03-2 by adjusting the thickness of at least some of the barrier membrane layers 031.

[0094] For example, refer to Figure 6 and Figure 7 The first barrier dam Dam1 shown therein may include two barrier membrane layers 031 in the first part 031-1 and three barrier membrane layers 031 in the second part 031-2. The second barrier dam Dam2 may include two barrier membrane layers 031 in the first part 031-1 and four barrier membrane layers 031 in the second part 03-2.

[0095] Optionally, in this embodiment of the disclosure, in each barrier dam 03, the multilayer barrier film layer 031 included in the first part 03-1 may belong to the barrier film layer 031 included in the multilayer barrier film layer 031 of the second part 03-2. Furthermore, in a portion of the barrier dams 03, the barrier film layer 031 in the multilayer barrier film layer 031 included in the first part 03-1 that is away from the substrate 01 is the same as the barrier film layer 031 in the multilayer barrier film layer 031 included in the second part 03-2 that is away from the substrate 01. In another portion of the barrier dams 03, the barrier film layer 031 in the multilayer barrier film layer 031 included in the first part 03-1 that is away from the substrate 01 is different from the barrier film layer 031 in the multilayer barrier film layer 031 included in the second part 03-2 that is away from the substrate 01.

[0096] For example, refer to Figures 2 to 4 The pixel structure 02 described in this embodiment may include a first planarization layer PLN1, a second planarization layer PLN2, and a third planarization layer PLN3 sequentially stacked along a direction away from the substrate 01. Continuing with reference to this... Figure 6 and Figure 7 It can be seen that in the first barrier dam Dan1, the two barrier membrane layers 031 included in the first part 03-1 can be located in the same layer as the second planarization layer PLN2 and the support layer PS, respectively. The three barrier membrane layers 031 included in the second part 03-2 can be located in the same layer as the second planarization layer PLN2, the third planarization layer PLN3 and the support layer PS, respectively. In the second barrier dam Dan2, the two barrier membrane layers 031 included in the first part 03-1 are located in the same layer as the first planarization layer PLN1 and the second planarization layer PLN2, respectively. The four barrier membrane layers 031 included in the second part 03-2 are located in the same layer as the first planarization layer PLN1, the second planarization layer PLN2, the third planarization layer PLN3 and the support layer PS, respectively. It can be seen that the first part 03-1 and the second part 03-2 of the first barrier dam Dam1 have the same barrier film layer 031 away from the substrate 01, which is the support layer PS. However, the first part 03-1 and the second part 03-2 of the second barrier dam Dam2 have different barrier film layers 031 away from the substrate 01, which are the support layer PS and the second planarization layer PLN2, respectively.

[0097] That is, for the left / right / upper side frame, the blocking dam Dam1 close to the display area AA can adopt a three-layer film layer stack of PLN2+PLN3+PS, and the height h1-2 can be 4.4 μm as described in the above embodiment. The blocking dam Dam2 away from the display area AA can adopt a four-layer film layer stack of PLN1+PLN2+PLN3+PS, and the height h2-2 can be 6 μm as described in the above embodiment. For the lower side frame close to the IC side, the blocking dam Dam1 close to the display area AA can adopt a two-layer film layer stack of PLN2+PS, and the height h1-1 can be 2.8 μm as described in the above embodiment. The Dam2 away from the display area AA can adopt a two-layer film layer stack of PLN1+PLN2, and the height h2-1 can be 3.2 μm as described in the above embodiment.

[0098] It should be noted that the film layer stack mode of the above blocking dam 03 is only illustratively described, and in some embodiments, the blocking dams Dam1 and Dam2 can also be stacked by other film layers in the pixel structure 02. In addition, the above height is only illustratively described. For the planar layer 022, the height (which can also be referred to as the thickness) is generally between 1.5 μm and 1.6 μm. For the support layer 024, the height is generally between 1.2 μm and 1.5 μm. On this basis, the height of the planar layer 022 and the support layer 024 can be flexibly set to flexibly adjust the height of the blocking dams Dam1 and Dam2. In addition, in the above embodiment, the width of the blocking dams Dam1 and Dam2 is only illustratively described.

[0099] For example, for the blocking dam Dam2 of the left / right / upper side frame, the heights of the first planar layer PLN1, the second planar layer PLN2, the third planar layer PLN3 and the support layer PS included therein can be 1.6 μm, 1.6 μm, 1.6 μm and 1.2 μm, respectively. Correspondingly, the total height h2-2 is 6 μm as described in the above embodiment. The widths of the first planar layer PLN1, the second planar layer PLN2, the third planar layer PLN3 and the support layer PS included therein can be 18 μm, 28 μm, 36 μm and 40 μm, respectively. Correspondingly, the maximum width is the width of the support layer 024: 40 μm.

[0100] Optionally, in combination with Figures 6 to 8As can be seen, in the barrier dam 03, the width of the multilayer barrier film layer 031 included in the first portion 03-1 and the width of the multilayer barrier film layer 031 included in the second portion 03-2 are both sequentially decreased along the direction close to the substrate 01, i.e., the film layer is designed as upper covering lower. And, the multilayer barrier film layer 031 included in the first portion 03-1 belongs to the multilayer barrier film layer 031 included in the second portion 03-2, then for each of the other barrier dams 03, the barrier dam 03 (e.g., the barrier dam Dam2) can further include: a transition region between the first portion 03-1 and the second portion 03-2, which can be referred to Figure 6 the region between a-a' and d-d' shown in the figure.

[0101] Wherein, in the transition region, the width of the target film layer in the multilayer barrier film layer included in the second portion 03-2 can be transitionally widened to equal the width of the barrier dam 03, and the target film layer is the barrier film layer in the multilayer barrier film layer included in the second portion 03-2, which is used as the barrier film layer in the multilayer barrier film layer included in the first portion 03-1, which is away from the substrate 01. For example, Figures 6 to 8 the target film layer is the second planar layer PLN2 included in the barrier dam Dam2 shown in the figure.

[0102] And, the barrier film layer in the multilayer barrier film layer included in the second portion, which is away from the substrate 01, covers the orthographic projection of the transition region on the substrate 01. For example, Figures 6 to 8 the barrier film layer in the second portion of the barrier dam Dam2, which is away from the substrate 01, is the support layer 024 shown in the figure. In this way, in combination with Figure 7 the first portion 03-1 and the second portion 03-2, the width of the barrier dam 03 at each position can be reliably guaranteed to be the same. In addition, it is also considered that the process is affected.

[0103] Optionally, in combination with Figure 8 in the transition region, for each side of the target film layer, the widening angle θ can be the same and can be less than 90 degrees, and / or the widening width d0 can be the same. In this way, mainly considering the process feasibility, and ensuring that the widening uniformity of the upper and lower sides can be better.

[0104] For example, in combination with Figures 6 to 8It can be seen that the top barrier film layer of the first part 03-1 and the second part 03-2 of the barrier dam Dam1 is the support layer 024, and on the basis of the upper package lower design, the width of the support layer 024 is the width of the barrier dam 03, so it is not necessary to widen, so that the width of the barrier dam Dam1 at each frame remains consistent. Because the top barrier film layer of the first part 03-1 of the barrier dam Dam2 is replaced by the top barrier film layer (support layer 024) of the second part 03-2 to the second flat layer PLN2, and the width of the second flat layer PLN2 is less than the width of the support layer 024, so the width of the second flat layer PLN2 needs to be widened in the transition area, so that the width of the second flat layer PLN2 in the first part 03-1 can be widened to equal the width of the top barrier film layer (support layer 024) of the second part 03-2. At the same time, in the transition area, the support layer 024 can also be extended to cover, so that the width of the barrier dam Dam2 at each place is equal.

[0105] Optionally, Figure 8 In the barrier dam Dam2, the width of the first flat layer PLN1 is identified as d2-pln1, the width of the second flat layer PLN2 before and after widening is identified as d2-pln2-1 and d2-pln2-2 respectively, the width of the third flat layer PLN3 is identified as d2-pln3, the width of the support layer PS is identified as d2-ps, and the widening angle θ and the widening width d0 are also identified, and the spacing e between the end boundary of the third flat layer PLN3 and the initial boundary of the second flat layer PLN2 after widening, and the spacing f between the end boundary of the support layer PS and the end boundary of the third flat layer PLN3 are also identified. In an embodiment, as described in the above embodiment, d2-pln1 can be 18 μm. d2-pln2-1 can be 28 μm. d2-pln3 can be 36 μm. d2-pln2-2 and d2-ps can be 40 μm. e can be 20 μm. f can be 20 μm. θ can be 45 degrees. And d0 can be 6 μm. That is, the upper and lower edges of the second flat layer PLN2 can each be widened by 6 μm in the 45-degree widening direction, a total of 12 μm, thereby achieving reliable widening from 28 μm to 40 μm. It can also be seen from this embodiment that the third flat layer PLN3 can also cover part of the transition area, thereby further reliably ensuring that the width of the barrier dam Dam2 at each place can remain consistent. Of course, the width and the included angle here are only illustrative and do not limit the barrier dam structure of the embodiments of the present disclosure.

[0106] In summary, the display panel provided by the embodiments of the present disclosure includes a substrate, a pixel structure located in a display area of the substrate, and a barrier dam located in a non-display area of the substrate. The pixel structure includes a pixel circuit layer, at least one planar layer, a black pixel defining layer, and a support layer which are stacked in sequence. The barrier dam includes a plurality of barrier film layers, and the plurality of barrier film layers are located in the same layer as part of the film layers in the planar layer and the support layer included in the pixel structure. That is, the barrier dam can be prepared by using the planar layer and the support layer which have good bending performance, instead of the black pixel defining layer which has poor bending performance. In this way, the problem that the black pixel defining layer cannot be used to prepare the barrier dam in a folding product due to poor bending performance can be solved. The barrier dam in the display panel provided by the embodiments of the present disclosure can be well applied to different types of display products.

[0107] Figure 9 is a structural schematic diagram of a display device provided by the embodiments of the present disclosure. As shown in Figure 9 the display device includes a driving circuit 10 and the display panel 00 as described in the above embodiments.

[0108] The driving circuit 10 is electrically connected with the display panel 00 and is configured to drive the display panel 00 to emit light.

[0109] Optionally, the display device described in the embodiments of the present disclosure can be any product or component having a display function, such as an OLED display device, a mobile phone, a tablet computer, a flexible display device, a television, and a display.

[0110] It should be noted that in the drawings, the sizes of the layers and regions can be exaggerated for clarity. It should also be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer, or intervening layers can also be present. In addition, it should be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or layer, or one or more intervening layers or elements can also be present. In addition, it should be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer or element between the two layers or elements, or one or more intervening layers or elements can also be present. Similar reference numerals indicate similar elements throughout the specification.

[0111] In addition, the terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood as the common meanings of the technical terms or scientific terms understood by those skilled in the art to which the present disclosure belongs.

[0112] As in the embodiments of the present disclosure, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited.

[0113] Similarly, "one" or "a" or similar words do not represent a quantity limitation, but represent the existence of at least one.

[0114] The terms "include" or "contain" or similar words mean that the elements or objects appearing before "include" or "contain" cover the elements or objects listed after "include" or "contain" and their equivalents, and do not exclude other elements or objects.

[0115] "Up", "down", "left" or "right" are only used to represent relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0116] "And / or" means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are in an "or" relationship.

[0117] The above only describes optional embodiments of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate having a display area and a non-display area at least partially surrounding the display area; the substrate further has a binding area located on a side of the non-display area away from the display area and abutting the non-display area; a plurality of pixel structures located on a side of the substrate and located in the display area, the pixel structure comprising a pixel circuit layer, at least one planar layer, a black pixel defining layer and a support layer stacked in sequence in a direction away from the substrate, the black pixel defining layer having a plurality of first openings arranged in a spaced manner along a bearing surface parallel to the substrate, the pixel structure further comprising a light emitting element located in each of the first openings; and a plurality of barrier dams located on a side of the substrate and located in the non-display area, the plurality of barrier dams being arranged in a spaced manner in a direction away from the display area, and each of the barrier dams comprising a plurality of barrier film layers stacked in sequence in a direction away from the substrate; wherein the plurality of barrier film layers are located in the same layer as part of the at least one planar layer and the support layer; in each of the barrier dams, a first portion close to the binding area has a height smaller than a second portion away from the binding area.

2. The display panel of claim 1, wherein, In the plurality of barrier dams, a barrier dam close to the display area has a width smaller than a barrier dam away from the display area, and / or a barrier dam close to the display area has a height smaller than a barrier dam away from the display area; wherein the width direction is parallel to the bearing surface of the substrate, and the height direction is perpendicular to the bearing surface of the substrate.

3. The display panel of claim 1, wherein, The substrate is rectangular and has a first bezel, a second bezel, a third bezel and a fourth bezel; The non-display area surrounds the display area, and each of the barrier dams in the non-display area surrounds the display area; the binding area is located on a side of the fourth bezel; wherein in each of the barrier dams, the first portion is located on a side of the fourth bezel, the second portion is located on a side of the first bezel, the second bezel, the third bezel and the fourth bezel, and a portion of the second portion located on a side of the fourth bezel is located outside the first portion.

4. The display panel of claim 1, wherein, The width of the plurality of barrier film layers included in the first portion and the width of the plurality of barrier film layers included in the second portion both decrease in sequence in a direction close to the substrate; and in each of two adjacent barrier film layers, the barrier film layer away from the substrate covers the projection of the barrier film layer close to the substrate on the substrate.

5. The display panel of claim 4, wherein, The central axes of the plurality of barrier film layers included in the first portion are collinear, the central axes of the plurality of barrier film layers included in the second portion are collinear, and the central axes of the first portion and the central axes of the second portion are collinear.

6. The display panel of any one of claims 1 to 5, wherein, The number of barrier film layers included in the first portion is smaller than the number of barrier film layers included in the second portion.

7. The display panel of claim 6, wherein, The plurality of barrier film layers included in the first portion belong to the barrier film layers included in the second portion.

8. The display panel according to any one of claims 1 to 5, characterized in that, In some of the plurality of barrier dams, the first portion includes a barrier film layer far from the substrate that is the same as a barrier film layer far from the substrate included in the second portion; in other of the plurality of barrier dams, the first portion includes a barrier film layer far from the substrate that is different from a barrier film layer far from the substrate included in the second portion.

9. The display panel of claim 8, wherein, If the width of the barrier film layer included in the first portion and the width of the barrier film layer included in the second portion are both sequentially reduced in a direction close to the substrate, and the barrier film layer included in the first portion belongs to the barrier film layers included in the second portion, then for each of the other of the plurality of barrier dams, the barrier dam further includes: a transition region between the first portion and the second portion; In the transition region, the width of a target film layer included in the second portion is transitionally widened to equal the width of the barrier dam, the target film layer being a barrier film layer far from the substrate included in the first portion; and the barrier film layer far from the substrate included in the second portion covers a normal projection of the transition region on the substrate. For each side of the target film layer, the widening angle is the same and less than 90 degrees, and / or the widening width is the same.

10. The display panel of claim 9, wherein, The display panel includes: a first barrier dam and a second barrier dam arranged in a direction away from the display area; 11. The display panel according to any one of claims 1 to 5, characterized in that, In the first barrier dam, the first portion includes two barrier film layers, and the second portion includes three barrier film layers; In the second barrier dam, the first portion includes two barrier film layers, and the second portion includes four barrier film layers. The pixel structure includes: a first planar layer, a second planar layer, and a third planar layer sequentially stacked in a direction away from the substrate; 12. The display panel of claim 11, wherein, In the first barrier dam, the two barrier film layers included in the first portion are located in the same layer as the second planar layer and the support layer, respectively, and the three barrier film layers included in the second portion are located in the same layer as the second planar layer, the third planar layer, and the support layer, respectively; In the second barrier dam, the two barrier film layers included in the first portion are located in the same layer as the first planar layer and the second planar layer, respectively, and the four barrier film layers included in the second portion are located in the same layer as the first planar layer, the second planar layer, the third planar layer, and the support layer, respectively. The display panel further includes:

13. The display panel according to any one of claims 1 to 5, characterized in that, An encapsulation layer, a black matrix layer, and a protection layer sequentially stacked in a direction away from the substrate on a side of the black pixel defining layer away from the substrate, the black matrix layer having a plurality of second openings corresponding one-to-one to the plurality of first openings; And a filter layer located in each of the second openings, and the color of the filter layer in each of the second openings is the same as the color of the light emitting element in the corresponding first opening. ​ 14. A display device comprising: The display device comprises a driving circuit and the display panel as claimed in any one of claims 1 to 13. The driving circuit is electrically connected with the display panel and is configured to drive the display panel to emit light.

Images