Display panel and manufacturing method thereof, and display device

Abstract

The present disclosure provides a display panel and a manufacturing method thereof, and a display device, which belong to the field of display technology. In the display panel, there is a gap between the support layer and the pixel definition layer. In this way, the problem that when cracks appear in the encapsulation layer, water and oxygen in the air invade the support layer through the cracks, and then invade the luminescent material through the support layer and the pixel definition layer is effectively avoided. Further, the problem that the luminescent material in the pixel fails due to the invasion of water and oxygen is effectively avoided. The display panel provided by the present disclosure has a good yield.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display panel and a manufacturing method thereof, and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panels are widely used in the display field due to their advantages such as thin thickness, self-luminescence, bendability and ability to be manufactured on flexible substrates.

[0003] In the related art, an OLED display panel generally includes a base substrate, a spacer (PS) layer located on one side of the base substrate, pixels located in the openings of the PS layer, and an encapsulation layer located on the side of the PS layer away from the base substrate. The light-emitting material in the pixel is generally evaporated in the opening by an evaporation process using a mask after forming a PS layer with an opening. The encapsulation layer is deposited on the side of the support layer away from the base substrate after forming the pixel.

[0004] However, when evaporating the luminescent material, friction occurs between the MASK and the PS layer, resulting in a gap in the PS layer, which in turn causes a crack in the encapsulation layer at the gap. Accordingly, water and oxygen in the air will penetrate the luminescent material through the crack and the PS layer, causing the luminescent material to fail, and the yield of the OLED display panel is poor. Summary of the invention

[0005] The embodiments of the present disclosure provide a display panel and a manufacturing method thereof, and a display device, which can solve the problem of poor yield of OLED display panels in related technologies. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, the display panel comprising:

[0007] substrate substrate;

[0008] A support layer and a pixel definition layer located on the same side and in the same layer of the base substrate; wherein the pixel definition layer has an opening, a gap is provided between the support layer and the pixel definition layer, and the height of the support layer is greater than the height of the pixel definition layer in a direction away from the base substrate;

[0009] a pixel located within the opening;

[0010] And, a first packaging layer is located on a side of the support layer away from the substrate.

[0011] Optionally, the width of the gap is greater than or equal to 1 micron and less than or equal to 4 microns.

[0012] Optionally, the material of the first encapsulation layer includes an inorganic material, and the gap is filled with the first encapsulation layer.

[0013] Optionally, the display panel further includes: at least one water- and oxygen-blocking dam located in the gap, and the at least one water- and oxygen-blocking dam is spaced apart from both the supporting layer and the pixel defining layer.

[0014] Optionally, the material of the water-blocking and oxygen-blocking dam includes: metal material.

[0015] Optionally, the material of the support layer includes: water-blocking and oxygen-blocking material.

[0016] Optionally, the display panel further includes: a second encapsulation layer and a third encapsulation layer located on a side of the first encapsulation layer away from the support layer and stacked in sequence in a direction away from the base substrate.

[0017] The material of the second encapsulation layer includes organic material, and the material of the third encapsulation layer includes inorganic material.

[0018] In another aspect, a method for manufacturing a display panel is provided. The method is used to manufacture the display panel according to the above aspect, and the method comprises:

[0019] providing a substrate base plate;

[0020] On the same side of the base substrate, a support layer and a pixel definition layer are formed, which are located in the same layer and have a gap; wherein the pixel definition layer has an opening, and in a direction away from the base substrate, the height of the support layer is greater than the height of the pixel definition layer;

[0021] forming pixels within the openings;

[0022] And, a first packaging layer is formed on a side of the support layer away from the base substrate.

[0023] Optionally, forming a support layer and a pixel defining layer located in the same layer and having a gap on the same side of the base substrate includes:

[0024] forming a support material layer on one side of the base substrate;

[0025] Expose the support material layer using a mask plate to form a support layer and a pixel defining layer located in the same layer and having a gap on the same side of the substrate;

[0026] The orthographic projection of the full exposure area of ​​the mask plate on the base substrate overlaps with the orthographic projection of the gap on the base substrate.

[0027] In yet another aspect, a display device is provided, the display device comprising: a power supply component, and the display panel as described in the above aspect;

[0028] Wherein, the power supply component is electrically connected to the display panel and is used to supply power to the display panel.

[0029] The beneficial effects brought by the technical solution provided by the embodiments of the present disclosure include at least:

[0030] A display panel and a manufacturing method thereof, and a display device are provided. In the display panel, there is a gap between the support layer and the pixel definition layer. In this way, when cracks appear in the encapsulation layer, the problem of water and oxygen in the air invading the support layer through the cracks and then invading the luminescent material through the support layer and the pixel definition layer is effectively avoided. Further, the problem of the luminescent material in the pixel failing due to the invasion of water and oxygen is effectively avoided. The display panel provided by the embodiment of the present disclosure has a good yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present disclosure;

[0033] Figure 2 is a schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0034] Figure 3 is a structural schematic diagram of another display panel provided by an embodiment of the present disclosure;

[0035] Figure 4 is a structural schematic diagram of another display panel provided by an embodiment of the present disclosure;

[0036] Figure 5 is a structural schematic diagram of another display panel provided by an embodiment of the present disclosure;

[0037] Figure 6 is a structural schematic diagram of another display panel provided by an embodiment of the present disclosure;

[0038] Figure 7 is a flow chart of a method for manufacturing a display panel provided by an embodiment of the present disclosure;

[0039] Figure 8 is a flow chart of a method for forming a support layer and a pixel defining layer provided by an embodiment of the present disclosure;

[0040] Fig. 9 is a schematic diagram of a process for forming a support layer and a pixel defining layer provided by an embodiment of the present disclosure;

[0041] Fig.10 It is a structural schematic diagram of a display device provided by an embodiment of the present disclosure.

[0042] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0044] 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 the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The "and / or" mentioned in the embodiments of the present disclosure indicates that three relationships may exist. For example, A and / or B may indicate that A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0045] Figure 1 is a schematic diagram of the structure of a display panel provided by an embodiment of the present disclosure. Figure 1As shown, the display panel includes: a base substrate 01. A support layer 02 and a pixel definition layer (PDL) 03 located on the same side and in the same layer of the base substrate 01, the support layer 02 can be called a PS layer, and the pixel definition layer 03 has an opening K0. On this basis, the display panel also includes: a pixel 04 located in the opening K0. And a first encapsulation layer 05 located on the side of the support layer 02 away from the base substrate 01. Since the opening K0 is used to set the pixel 04, the area where the opening K0 is located can also be called a pixel area.

[0046] Among them, reference Figure 1 It can also be seen that in the embodiment of the present disclosure, in the direction Y1 away from the base substrate 01, the height h1 of the support layer 02 can be greater than the height h2 of the pixel definition layer 03. In this way, when the light-emitting material included in the pixel 04 is evaporated in the opening K0 of the pixel definition layer 03, the mask MASK used in the evaporation process will only rub against the support layer 02, resulting in a gap in the support layer 02, and will not rub against the pixel definition layer 03, that is, the pixel definition layer 03 will not have a gap. Furthermore, the first encapsulation layer 05 deposited on the side of the support layer 02 away from the base substrate 01 will only break at the gap of the support layer 02, and will not break on the side of the pixel definition layer 03 away from the base substrate 01.

[0047] In addition, reference Figure 1 It can also be seen that in the embodiment of the present disclosure, there may be a gap between the support layer 02 and the pixel definition layer 03, that is, the support layer 02 and the pixel definition layer 03 are not in contact. In this way, assuming that the first encapsulation layer 05 breaks at the notch of the support layer 02, that is, a crack appears, the gap can block the water oxygen (that is, water vapor and oxygen in the air) that invades the support layer 02 through the crack to the support layer 02, so that the water oxygen cannot further invade the pixel definition layer 03, and then cannot invade the pixel 04 to cause the luminescent material in the pixel 04 to fail. That is, in the display panel provided by the embodiment of the present disclosure, the water oxygen can only invade the support layer 02 through the crack of the first encapsulation layer 05, but cannot invade the pixel 04. Furthermore, the problem of water oxygen causing the failure of the luminescent material in the pixel 04 is effectively avoided, and there will be no black spots that continue to grow at the pixel 04, that is, the GDS phenomenon will not occur.

[0048] In summary, the embodiment of the present disclosure provides a display panel, in which there is a gap between the support layer and the pixel definition layer. In this way, the problem that when cracks appear in the encapsulation layer, water and oxygen in the air invade the support layer through the cracks, and then invade the light-emitting material through the support layer and the pixel definition layer is effectively avoided. Further, the problem that the light-emitting material in the pixel fails due to the invasion of water and oxygen is effectively avoided. The display panel provided by the embodiment of the present disclosure has a good yield.

[0049] It should be noted that Figure 1 In the figure, only a portion of the support layer 02 between two adjacent pixels 04 is shown, and only a portion of the pixel definition layer 03 defining the two pixels 04 is shown. In the shipped OLED product, the display panel may include: a plurality of pixels 04 located on the base substrate 01, each pixel 04 is defined in the pixel region by the pixel definition layer 02, and a support layer 02 may be included between each two adjacent pixels 04. The drawings described in the following embodiments are similar and will not be described in detail.

[0050] Optional, combined Figure 1 , the shape of the support layer 02 can generally be a positive trapezoid, that is, along the direction Y1 away from the base substrate 01, the width d1 of the support layer 02 gradually decreases. On this basis, the maximum width of the support layer 02 is generally about 10 microns (μm), and, because the spacing between each two adjacent pixels 04 in the display panel is generally about 18μm, it can be seen from the above discussion on the structure that in the display panel recorded in the embodiment of the present disclosure, the width d0 of the gap between the support layer 02 and the pixel defining layer 03 can be greater than or equal to 1μm, and less than or equal to 4μm. For example, the width d0 of the gap between the support layer 02 and the pixel defining layer 03 can generally be 3μm, that is, the width of the gap d0 can be larger, so that effective blocking of water and oxygen can be achieved. The width here can refer to the width of the structure in the direction perpendicular to the direction Y1. The spacing between each two adjacent pixels 04 can refer to the spacing between the pixel defining layers 03 that define the two pixels 04.

[0051] Of course, in some embodiments, the maximum width of the support layer 02 can be reduced to increase the width d0 between the support layer 02 and the pixel defining layer 03 to effectively block water and oxygen. For example, the maximum width of the support layer 02 can be reduced to 8 μm. Accordingly, based on the spacing between each two adjacent pixels 04 being about 18 μm, the width d0 between the support layer 02 and the pixel defining layer 03 can be greater than or equal to 1 μm and less than or equal to 5 μm. For example, the width d0 of the gap between the support layer 02 and the pixel defining layer 03 can be set to 4 μm.

[0052] Optionally, the pixel 04 described in the embodiment of the present disclosure may include: a pixel circuit and a light-emitting element, and the light-emitting element may be an organic light-emitting diode OLED. Figure 2As can be seen from another display panel shown, the light-emitting element may include an anode, a cathode and a light-emitting layer, and the light-emitting layer may include an organic light-emitting material. The pixel circuit may include at least two transistors composed of a source & drain metal (SD) layer, a gate metal (gate) layer and a planarization (PLN) layer. Figure 2 Only the PLN layer, SD layer and anode Anode are shown schematically.

[0053] The pixel circuit may be electrically connected to the light emitting element, and the pixel circuit may be used to drive the light emitting element to emit light. For example, the pixel circuit may be electrically connected to the anode of the light emitting element, and the cathode of the light emitting element may be grounded. The pixel circuit may transmit a driving current to the anode of the light emitting element to drive the light emitting element to emit light.

[0054] The organic light-emitting material in the light-emitting element is sensitive to water and oxygen in the air. Once water and oxygen invade the organic light-emitting material, the organic light-emitting material will fail, and the light-emitting element will not emit light normally. However, by providing a gap between the support layer 02 and the pixel defining layer 03, the embodiment of the present disclosure can prevent water and oxygen in the air from invading the pixel 04, that is, from invading the organic light-emitting material. Accordingly, the organic light-emitting material will not fail, the light-emitting element can emit light reliably, and the display effect of the display panel is better.

[0055] Optionally, in the embodiment of the present disclosure, the support layer 02 and the pixel defining layer 03 located in the same layer can also be made of the same material. In this way, the support layer 02 and the pixel defining layer 03 with a gap can be formed simultaneously using the same mask and a single patterning process. A single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. That is, multiple elements, components, structures and / or parts located in the "same layer" are composed of the same material and are formed by the same patterning process. The support layer 02 and the pixel defining layer 03 formed by a single patterning process in the embodiment of the present disclosure can be considered to be discontinuous, that is, there is a gap between the two. Forming the support layer 02 and the pixel defining layer 03 by a single patterning process can reduce production costs and improve production efficiency.

[0056] Optionally, the materials of the support layer 02 and the pixel defining layer 03 may both be organic materials, such as polyimide glue, which can absorb water and oxygen.

[0057] Optional, Figure 3 FIG. 1 is a schematic diagram of the structure of another display panel provided by an embodiment of the present disclosure. Figure 3As shown, the display panel described in the embodiment of the present disclosure may further include: a second encapsulation layer 06 and a second encapsulation layer 07 located on a side of the first encapsulation layer 05 away from the support layer 02 and stacked in sequence along a direction Y1 away from the base substrate 01 .

[0058] The material of the first encapsulation layer 05 and the material of the third encapsulation layer 07 may both include inorganic materials, and the material of the second encapsulation layer 06 may include organic materials.

[0059] Optionally, the inorganic material may be silicon oxynitride (SiNO), silicon oxide (SiOx) or silicon nitride (SiNx). The inorganic material cannot absorb water and oxygen, that is, it is impermeable to water. The organic material may be polymethylmethacrylate (PMMA).

[0060] Based on the materials of the first encapsulation layer 05, the second encapsulation layer 06 and the third encapsulation layer 07, it can be known that: in the embodiment of the present disclosure, the first encapsulation layer 05 can be formed on the side of the support layer 02 away from the substrate 01 by a low-temperature chemical vapor deposition (CVD) method, and the third encapsulation layer 07 can be formed on the side of the second encapsulation layer 06 away from the first encapsulation layer 05. The second encapsulation layer 06 can be formed on the side of the first encapsulation layer 05 away from the support layer 02 by an inkjet printing (IJP) method. Accordingly, the first encapsulation layer 05 can be called a CVD1 layer, the second encapsulation layer 06 can be called an IJP layer, and the third encapsulation layer 07 can be called a CVD2 layer.

[0061] On the basis that the material of the first encapsulation layer 05 includes a water-impermeable inorganic material, reference Figures 1 to 3 It can be seen that in the embodiment of the present disclosure, the gap can be filled with the first encapsulation layer 05. That is, the first encapsulation layer 05 can also be deposited in the gap. In this way, it is possible to further effectively block water and oxygen, and prevent water and oxygen from invading the pixel defining layer 03 through the support layer 02, and further invading the pixel 04 through the pixel defining layer 03, thereby causing the luminescent material in the pixel 04 to fail and the pixel 04 to fail to emit light normally.

[0062] Optionally, the thickness of the first encapsulation layer 05 may be greater than or equal to 0.9 microns and less than or equal to 1.1 microns. For example, the thickness of the first encapsulation layer 05 may be 1 μm. The thickness of the second encapsulation layer 06 may be much greater than the thickness of the first encapsulation layer 05. The thickness of the third encapsulation layer 07 may be close to the thickness of the first encapsulation layer 05, such as generally being equal to the thickness of the first encapsulation layer 05. By setting each encapsulation layer with a thickness that meets this requirement, the light transmittance of the display panel can be ensured to be good under the premise of achieving effective encapsulation.

[0063] Based on the above conditions, combined with Figure 4 and Figure 5 When the support layer 02 and the mask plate MASK rub against each other and form a notch, the first packaging layer 05 formed on the support layer 02 will form an irregular film at the notch position, and the first packaging layer 05 is prone to slight cracks (also called cracks).

[0064] Recombination Figure 4 As shown in the attached figure, if there is no gap between the support layer 02 and the pixel definition layer 03, in other words, the support layer 02 and the pixel definition layer 03 are an integrated structure, then when the water oxygen in the air invades the second encapsulation layer 06, causing the second encapsulation layer 06 to be in a saturated state, the water oxygen will invade the support layer 02 through the cracks in the first encapsulation layer 05. Then, it will further invade the pixel 04 through the pixel definition layer 03, causing the organic light-emitting material in the pixel 04 to fail, and the light-emitting element included in the pixel 04 cannot be normally lit, and the pixel 04 cannot emit light normally.

[0065] Combined with Figure 5 As shown in the attached figure, if there is a gap between the support layer 02 and the pixel definition layer 03, when the water oxygen in the air invades the second encapsulation layer 06 and causes the second encapsulation layer 06 to be in a saturated state, the water oxygen will further invade the support layer 02 through the cracks in the first encapsulation layer 05, but due to the existence of the gap, the water oxygen cannot further invade the pixel definition layer 03, and accordingly, cannot further invade the pixel 04 through the pixel definition layer 03. The organic light-emitting material in the pixel 04 will not fail, the light-emitting element included in the pixel 04 can be normally lit, and the pixel 04 can emit light normally.

[0066] That is, in the embodiment of the present disclosure, by integrating the existing support layer 02 and the pixel definition layer 03 (see Figure 4 ) to change the structure so that there is a gap between the support layer 02 and the pixel definition layer 03 (see Figure 5 ), which can effectively block the path of water vapor invading the IJP layer from invading the pixel 04 through the support layer 02, thereby reducing the incidence of GDS.

[0067] It should be noted that the display panel may include not only the three encapsulation layers shown in the figure, but more encapsulation layers may be provided to effectively protect the display panel. For example, multiple encapsulation layers may be further formed on the side of the third encapsulation layer 07 away from the second encapsulation layer 06 .

[0068] Optional, Figure 6 FIG. 1 is a schematic diagram of the structure of another display panel provided by an embodiment of the present disclosure. Figure 5As shown, the display panel may further include: at least one water-blocking and oxygen-blocking dam 08 located in the gap, and at least one water-blocking and oxygen-blocking dam 08 is spaced apart from both the support layer 02 and the pixel defining layer 03. Furthermore, if a plurality of water-blocking and oxygen-blocking dams 08 are included, there may be a space between each two adjacent water-blocking and oxygen-blocking dams 08.

[0069] For example, refer to Figure 6 , the display panel shown therein comprises two water-blocking and oxygen-blocking dams 08 located in the gap. The two water-blocking and oxygen-blocking dams 08 are arranged at intervals and are spaced apart from the support layer 02 and the pixel defining layer 03 .

[0070] By providing the water- and oxygen-blocking dam 08 , water and oxygen can be further effectively blocked, preventing water and oxygen from invading the pixel defining layer 03 through the support layer 02 and further invading the pixel 04 through the pixel defining layer 03 , thereby preventing the pixel 04 from emitting light normally.

[0071] Optionally, the material of the water- and oxygen-blocking dam 08 may include a metal material, such as metal silver (Ag). Metal materials are not only impermeable to water and oxygen, but also have a high hardness and a better effect of blocking water and oxygen.

[0072] Optionally, the material of the support layer 02 described in the embodiment of the present disclosure may include: water-blocking and oxygen-blocking material. For example, the water-blocking and oxygen-blocking material may include: polyvinylidene chloride (PVDC). In this way, effective water and oxygen blocking can be further achieved.

[0073] Optionally, the material of the substrate 01 described in the embodiment of the present disclosure may include a flexible material, such as a polyimide (PI) material. That is, the substrate 01 may be a flexible substrate.

[0074] Optionally, the display panel may further include an inter-level dielectric (ILD) layer between the pixel 04 and the base substrate 01 , and the material of the ILD layer may include an insulating material.

[0075] In summary, the embodiment of the present disclosure provides a display panel, in which there is a gap between the support layer and the pixel definition layer. In this way, the problem that when cracks appear in the encapsulation layer, water and oxygen in the air invade the support layer through the cracks, and then invade the light-emitting material through the support layer and the pixel definition layer is effectively avoided. Further, the problem that the light-emitting material in the pixel fails due to the invasion of water and oxygen is effectively avoided. The display panel provided by the embodiment of the present disclosure has a good yield.

[0076] Figure 7 The present disclosure provides a flow chart of a method for manufacturing a display panel. The method can be used to manufacture Figures 1 to 3 , Figure 5 and Figure 6 Any of the display panels shown. Figure 7 As shown, the method may include:

[0077] Step 701: Provide a substrate.

[0078] Optionally, in the embodiment of the present disclosure, the material of the substrate may include glass or a flexible material (such as PI), etc. That is, the substrate may be a glass substrate or a flexible substrate.

[0079] Step 702 : forming a support layer and a pixel defining layer on the same layer and with a gap therebetween on the same side of the base substrate.

[0080] Among them, reference Figure 1 The formed pixel defining layer 03 may have an opening K0 . In a direction Y1 away from the base substrate 01 , a height h1 of the support layer 02 is greater than a height h2 of the pixel defining layer 03 .

[0081] Step 703: forming pixels in the openings.

[0082] Optionally, the pixel may include a pixel circuit and a light-emitting element, and the light-emitting element may be an OLED device including an organic light-emitting material. In this way, after forming the support layer and the pixel defining layer, the organic light-emitting material may be formed by evaporation in the opening of the pixel defining layer using a mask plate MASK through an evaporation process.

[0083] For example, the mask plate may be a high-precision metal mask plate (Fine Metal Mask, FMM).

[0084] Step 704 : forming a first packaging layer on a side of the support layer away from the substrate.

[0085] Optionally, a deposition-related process may be used to deposit the first encapsulation layer on a side of the support layer away from the substrate.

[0086] In summary, the embodiments of the present disclosure provide a method for manufacturing a display panel. In the display panel manufactured by the method, there is a gap between the support layer and the pixel defining layer. In this way, the problem that when cracks appear in the encapsulation layer, water and oxygen in the air invade the support layer through the cracks, and then invade the light-emitting material through the support layer and the pixel defining layer is effectively avoided. Furthermore, the problem that the light-emitting material in the pixel fails due to the invasion of water and oxygen is effectively avoided. The display panel manufactured by the method provided by the embodiments of the present disclosure has a good yield.

[0087] Optionally, it can be seen from Reference 3 that in order to achieve effective protection of the display panel, the display panel, in addition to the first encapsulation layer 05, also includes a second encapsulation layer 06 and a second encapsulation layer 07 located on a side of the first encapsulation layer 05 away from the supporting layer 02, and stacked in sequence along a direction Y1 away from the base substrate 01.

[0088] The materials of the first encapsulation layer 05 and the third encapsulation layer 07 may both include inorganic materials. The materials of the second encapsulation layer 06 may include organic materials. On this basis, the first encapsulation layer 05, the second encapsulation layer 06 and the third encapsulation layer 07 stacked in sequence may be formed by the following process:

[0089] First, after evaporating an organic light-emitting material in the opening K0 of the pixel defining layer 02, an inorganic material may be deposited on the side of the supporting layer 02 away from the base substrate 01 by using a CVD process to form a first encapsulation layer 05. Then, an organic material may be disposed on the side of the first encapsulation layer 05 away from the supporting layer 02 by using an IJP process to form a second encapsulation layer 06. Finally, an inorganic material may be deposited on the side of the second encapsulation layer 06 away from the first encapsulation layer 05 by using a CVD process to form a third encapsulation layer 07.

[0090] Optionally, the first encapsulation layer 05 may be formed to fill the gap between the support layer 02 and the pixel defining layer 03. Since the first encapsulation layer 05 is made of inorganic material, it can further effectively block water and oxygen, thereby preventing water and oxygen from invading the pixels 04.

[0091] Optional, Figure 8 1 is a flow chart of a method for forming a support layer and a pixel defining layer provided by an embodiment of the present disclosure. Figure 8 As shown, the method (i.e., step 702) may include:

[0092] Step 7021: Form a support material layer on one side of the base substrate.

[0093] First, after providing the base substrate 01, a layer of organic material can be deposited on one side of the base substrate 01 by a deposition method to form a support material layer, and the organic material can be an organic glue. The base substrate with the support material layer M1 can be referred to Fig. 9 Schematic diagram.

[0094] Step 7022: Expose the support material layer using a mask plate to form a support layer and a pixel defining layer located in the same layer and with a gap on the same side of the substrate.

[0095] Then, the support material layer M1 can be directly exposed using a mask plate, and the orthographic projection of the full exposure area of ​​the mask plate on the substrate overlaps with the orthographic projection of the gap to be formed on the substrate. In this way, after the exposure process, the support material layer corresponding to the full exposure area can be fully exposed, and then the support material layer in this area can be removed by a development process to obtain Fig. 9 The support layer 02 and the pixel defining layer 03 are shown to be located on the same layer with a gap therebetween.

[0096] It should be noted that, combined with Figure 1 and Fig. 9 It can be seen that the portion where the opening is to be formed is fully exposed, so that the pixel definition layer 03 can have an opening K0, and further reliable evaporation of the light-emitting material is performed in the opening K0. Except for the opening K0 and the portion where the gap is located, the support material layer M1 at other positions is not exposed, that is, it is retained.

[0097] That is, in the embodiment of the present disclosure, the mask plate for exposing the original supporting material layer M1 is adjusted so that the supporting material layer M1 in the connecting area between the pixel defining layer 03 and the supporting layer 02 is fully exposed and removed, thereby creating a gap between the pixel defining layer 03 and the supporting layer 02.

[0098] In summary, the embodiments of the present disclosure provide a method for manufacturing a display panel. In the display panel manufactured by the method, there is a gap between the support layer and the pixel defining layer. In this way, the problem that when cracks appear in the encapsulation layer, water and oxygen in the air invade the support layer through the cracks, and then invade the light-emitting material through the support layer and the pixel defining layer is effectively avoided. Furthermore, the problem that the light-emitting material in the pixel fails due to the invasion of water and oxygen is effectively avoided. The display panel manufactured by the method provided by the embodiments of the present disclosure has a good yield.

[0099] Fig.10 Schematic diagram of a display device provided by an embodiment of the present disclosure. Fig.10 As shown, the display device may include: a power supply component J1, and Figures 1 to 3 , Figure 5 and Figure 6 Any of the display panels 00 shown.

[0100] The power supply component J1 may be electrically connected to the display panel 00 , and the power supply component J1 may be used to supply power to the display panel 00 .

[0101] Optionally, the display device may be: a liquid crystal panel, electronic paper, a flexible OLED display device, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0102] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0103] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, 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 in that: The display panel comprises: substrate substrate; A support layer and a pixel definition layer located on the same side and in the same layer of the base substrate; wherein the pixel definition layer has an opening, a gap is provided between the support layer and the pixel definition layer, and the height of the support layer is greater than the height of the pixel definition layer in a direction away from the base substrate; a pixel located within the opening; A first packaging layer located on a side of the support layer away from the substrate; And, at least one water-blocking and oxygen-blocking dam is located in the gap, and the at least one water-blocking and oxygen-blocking dam is spaced apart from both the supporting layer and the pixel defining layer.

2. The display panel according to claim 1, characterized in that: The width of the gap is greater than or equal to 1 micron and less than or equal to 4 microns.

3. The display panel according to claim 1, characterized in that: The material of the first encapsulation layer includes an inorganic material, and the gap is filled with the first encapsulation layer.

4. The display panel according to any one of claims 1 to 3, characterized in that: The material of the water-blocking and oxygen-blocking dam includes: metal material.

5. The display panel according to any one of claims 1 to 3, characterized in that: The material of the support layer includes: water-blocking and oxygen-blocking material.

6. The display panel according to any one of claims 1 to 3, characterized in that: The display panel further comprises: a second encapsulation layer and a third encapsulation layer which are located on a side of the first encapsulation layer away from the support layer and are sequentially stacked in a direction away from the base substrate; The material of the second encapsulation layer includes organic material, and the material of the third encapsulation layer includes inorganic material.

7. A method for manufacturing a display panel, characterized in that: The method is used to manufacture the display panel according to any one of claims 1 to 6, and the method comprises: providing a substrate base plate; On the same side of the base substrate, a support layer and a pixel definition layer are formed, which are located in the same layer and have a gap; wherein the pixel definition layer has an opening, and in a direction away from the base substrate, the height of the support layer is greater than the height of the pixel definition layer; forming a pixel within the opening; And, a first packaging layer is formed on a side of the support layer away from the base substrate.

8. The method according to claim 7, characterized in that The method comprises forming a support layer and a pixel defining layer located in the same layer and having a gap on the same side of the base substrate, including: forming a support material layer on one side of the base substrate; Expose the support material layer using a mask plate to form a support layer and a pixel defining layer located in the same layer and having a gap on the same side of the substrate; The orthographic projection of the full exposure area of ​​the mask plate on the base substrate overlaps with the orthographic projection of the gap on the base substrate.

9. A display device, characterized in that: The display device comprises: a power supply component, and a display panel according to any one of claims 1 to 6; Wherein, the power supply component is electrically connected to the display panel and is used to supply power to the display panel.

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