Display substrate and display apparatus

Abstract

A display substrate and a display apparatus, which relate to the technical field of display. The display substrate comprises a display area and a non-display area located at at least one side of the display area, wherein the non-display area comprises an isolation trench and a bendable area, and the isolation trench is located between the display area and the bendable area. The display substrate comprises a base substrate, and a first metal layer, an inorganic encapsulation layer and a plurality of organic layers which are stacked on a side of the base substrate, wherein the plurality of organic layers comprise a first organic layer, which is stacked between the first metal layer and the inorganic encapsulation layer, and the orthographic projection of at least one organic layer, other than the first organic layer, on the base substrate does not overlap with the isolation trench; and the first metal layer comprises a first trace which passes through the isolation trench, the first organic layer comprises a buffer pattern which is located at the isolation trench, the buffer pattern covers the edge of the first trace that is located at the isolation trench, and the buffer pattern overlaps with the orthographic projection of the inorganic encapsulation layer on the base substrate.

Description

Display substrate and display device

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 202411046690.4, filed on July 31, 2024, and entitled "Display substrate and display device", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of display, and in particular, to a display substrate and a display device. BACKGROUND

[0004] In recent years, with the rapid development of the display industry, consumers' requirements for display frame are becoming more and more strict, and narrow frame or even zero frame has gradually become a trend. Organic light emitting diode (OLED) is an active light emitting display device, which has the advantages of self-luminous, wide viewing angle, high contrast, low power consumption, wide color gamut, thin and light, and special-shaped display.

[0005] SUMMARY

[0006] The present disclosure provides a display substrate, comprising a display area and a non-display area located at least one side of the display area, the non-display area comprising an isolation groove and a bendable area, the isolation groove being located between the display area and the bendable area, the display substrate comprising:

[0007] a substrate substrate, and a first metal layer, an inorganic encapsulation layer and a plurality of organic layers stacked on one side of the substrate substrate, the plurality of organic layers comprising a first organic layer, the first organic layer being stacked between the first metal layer and the inorganic encapsulation layer, and the orthographic projection of at least one organic layer other than the first organic layer on the substrate substrate does not overlap with the isolation groove;

[0008] the first metal layer comprises a first trace passing through the isolation groove, the first organic layer comprises a buffer pattern located in the isolation groove, the buffer pattern covers the edge of the first trace located in the isolation groove, and the orthographic projection of the buffer pattern and the inorganic encapsulation layer on the substrate substrate overlaps.

[0009] In some embodiments, in the extension direction of the edge of the first trace located in the isolation groove, the orthographic projection of the buffer pattern on the substrate substrate covers the isolation groove.

[0010] In some embodiments, the buffer pattern comprises a first buffer pattern, and the first buffer pattern is arranged close to the bendable area.

[0011] The first organic layer further comprises a first organic pattern, the first organic pattern is located between the isolation groove and the display area, and a gap is present between the first organic pattern and the first buffer pattern.

[0012] In some embodiments, the display substrate further comprises:

[0013] A blocking pattern is disposed on a side of the inorganic encapsulation layer facing away from the substrate, and in a normal projection of the substrate, the blocking pattern covers the gap and an edge of the first trace at the gap.

[0014] In some embodiments, a width of the blocking pattern along a first direction is greater than a width of the first buffer pattern along the first direction, the first direction being perpendicular to an edge extension direction of the first trace at the isolation groove.

[0015] In some embodiments, the buffer pattern further comprises a second buffer pattern, the second buffer pattern is located at the gap, and a width of the second buffer pattern along a first direction is less than or equal to a width of the first buffer pattern along the first direction, the first direction being perpendicular to an edge extension direction of the first trace at the isolation groove.

[0016] The second buffer pattern has a breakpoint, and a second buffer pattern located on a side of the breakpoint closer to the display area is separated from a second buffer pattern located on a side of the breakpoint farther from the display area at the breakpoint.

[0017] In some embodiments, in the edge extension direction of the first trace at the isolation groove, the breakpoint is disposed substantially centrally relative to the second buffer pattern, and from the breakpoint to an edge of the second buffer pattern, a width of the second buffer pattern along the first direction gradually increases.

[0018] In some embodiments, in the edge extension direction of the first trace at the isolation groove, a size of the gap is greater than or equal to 15 microns and less than or equal to 30 microns.

[0019] In some embodiments, in the edge extension direction of the first trace at the isolation groove, a normal projection of the buffer pattern on the substrate completely covers the isolation groove.

[0020] In some embodiments, the first organic layer further comprises a water absorption pattern located at the isolation groove, the water absorption pattern is in communication with the buffer pattern and is located on a side of the buffer pattern facing away from the first trace, and the water absorption pattern is separated from the first organic layer outside the isolation groove.

[0021] In some embodiments, the display substrate further comprises:

[0022] a water storage portion located at the isolation groove, the water storage portion being connected to an end of the water absorption pattern away from the buffer pattern, the water storage portion being arranged in a stack on a side of the water absorption pattern close to and / or away from the substrate substrate, and the water storage portion being arranged separately from other patterns arranged in the same layer.

[0023] In some embodiments, in a first direction, a projection of an edge of the first trace on the substrate substrate is arranged substantially centrally within a projection area of the buffer pattern on the substrate substrate, the first direction being perpendicular to an extension direction of the edge of the first trace located at the isolation groove.

[0024] In some embodiments, a width of the buffer pattern along a first direction is greater than or equal to 0.5 microns and less than or equal to 10 microns, the first direction being perpendicular to an extension direction of the edge of the first trace located at the isolation groove.

[0025] In some embodiments, the display substrate further comprises:

[0026] an insulating layer arranged on a side of the inorganic encapsulation layer away from the substrate substrate; and

[0027] a protective layer arranged on a side of the insulating layer away from the substrate substrate, the protective layer comprising a first opening, the first opening completely penetrating the protective layer in a direction perpendicular to the substrate substrate; and

[0028] a projection of the first opening on the substrate substrate is located on a side of the isolation groove away from the display area, and a projection of the first opening on the substrate substrate is located within a projection area of the insulating layer on the substrate substrate.

[0029] In some embodiments, the display substrate further comprises:

[0030] a pixel definition layer arranged in a stack between the first organic layer and the inorganic encapsulation layer, for forming a plurality of pixel openings in the display area, and the pixel definition layer not overlapping with a projection of the first opening on the substrate substrate.

[0031] The present disclosure provides a display device, comprising: a display substrate as described in any of the embodiments, the bendable area being bent to a side of the display substrate away from the display area; and a driving assembly connected to the bendable area of the display substrate, for driving the display substrate to emit light.

[0032] The above description is only a summary of the technical solutions of the present disclosure. In order to enable the technical means of the present disclosure to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, features and advantages of the present disclosure to be more apparent and easy to understand, the specific embodiments of the present disclosure are described below.

[0033] Brief Description of Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor. It should be noted that the proportions in the drawings are only for illustration and do not represent the actual proportions.

[0035] Fig. 1 shows a cross-sectional structure schematic diagram of a display substrate in the related art;

[0036] Fig. 2 shows a planar structure schematic diagram of a first display substrate provided by the present disclosure;

[0037] Fig. 3 shows a cross-sectional structure schematic diagram along AA' in the first display substrate provided by the present disclosure;

[0038] Fig. 4 shows a cross-sectional structure schematic diagram along CC' in the display substrate in the related art and the first display substrate provided by the present disclosure;

[0039] Fig. 5 shows a planar structure schematic diagram of a second display substrate provided by the present disclosure;

[0040] Fig. 6 shows a planar structure schematic diagram of a third display substrate provided by the present disclosure;

[0041] Fig. 7 shows a cross-sectional structure schematic diagram along AA' in the third display substrate provided by the present disclosure;

[0042] Fig. 8 shows a cross-sectional structure schematic diagram along BB' in the first to third display substrates provided by the present disclosure.

[0043] Detailed Description

[0044] In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are some embodiments of the present disclosure, not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present disclosure.

[0045] The inventors found that OLED narrow frame products are prone to growable black spot defects after high temperature and high humidity reliability tests. As shown in FIG. 1, the main reason for the formation of black spot defects is that the polarizer POL shrinks in a high temperature and high humidity environment, causing the polarizer POL and the protective glue MCL to separate from each other, thereby forming a path for water and oxygen to enter the display area AA, as shown by the solid arrow in FIG. 1. After the protective layer TOC absorbs water and oxygen in the air, it enters the display area AA from the crack in the encapsulation layer FZ located in the isolation groove GL region.

[0046] To improve the black spot defect, the present disclosure provides a display substrate, as shown in FIG. 2, which includes a display area AA and a non-display area NA located on at least one side of the display area AA. The non-display area NA includes an isolation groove GL and a bendable area BA, and the isolation groove GL is located between the display area AA and the bendable area BA.

[0047] It should be noted that the display area AA and the non-display area NA are connected to each other in the display substrate, and the display area AA and the non-display area NA shown in FIG. 2 are mainly used to illustrate the relative positional relationship between the two.

[0048] It should be noted that FIG. 2b is a partial planar structure schematic diagram of a display substrate provided by the present disclosure, and FIG. 2a is an enlarged schematic diagram of the structure within the dashed line frame k1 in FIG. 2b.

[0049] Exemplarily, the bendable area BA is used to bend to the side of the display substrate away from the display area AA in the display device, i.e., the side facing away from the display surface of the display substrate.

[0050] As shown in FIG. 3, the display substrate includes a substrate 31, a first metal layer M1, an inorganic encapsulation layer CVD, and a plurality of organic layers ORG stacked on one side of the substrate 31. The plurality of organic layers ORG includes a first organic layer ORG1, and the first organic layer ORG1 is stacked between the first metal layer M1 and the inorganic encapsulation layer CVD. The orthographic projection of at least one organic layer ORG other than the first organic layer ORG1 on the substrate 31 does not overlap with the isolation groove GL.

[0051] As shown in FIGS. 2 and 3, the first metal layer M1 includes a first trace L1 passing through the isolation groove GL. The first organic layer ORG1 includes a buffer pattern HPT located in the isolation groove GL, the buffer pattern HPT covers the edge of the first trace L1 located in the isolation groove GL, and the buffer pattern HPT overlaps with the orthographic projection of the inorganic encapsulation layer CVD on the substrate 31.

[0052] Exemplarily, the at least one organic layer ORG other than the first organic layer ORG1 can include at least one of a second organic layer ORG2 located between the substrate 31 and the first metal layer M1, a pixel definition layer PDL located between the first organic layer ORG1 and the inorganic encapsulation layer CVD, and an organic encapsulation layer between two adjacent inorganic encapsulation layers CVD, and the like.

[0053] Exemplarily, as shown in FIG. 3, the second organic layer ORG2, the pixel definition layer PDL, and the organic encapsulation layer are all excavated at the isolation groove GL, that is, the orthographic projection of the second organic layer ORG2, the pixel definition layer PDL, and the organic encapsulation layer on the substrate 31 does not overlap with the isolation groove GL.

[0054] Since the light-emitting material located in the display area AA is very sensitive to water and oxygen, it is easy to react with water or oxygen and cause the internal light-emitting device to fail, so it is necessary to prevent water and oxygen from entering the display area AA to improve the display effect and service life of the display substrate. By excavating at least one organic layer ORG other than the first organic layer ORG1 in the isolation groove GL, the water and oxygen invasion path from the bendable area to the display area AA can be cut off.

[0055] If the edge of the first wire L1 is not covered by the buffer pattern HPT, as shown in FIG. 4a, in the etching of the first organic layer ORG1 and subsequent etching processes, the edge of the first wire L1 will be laterally etched to form a lateral groove 40, and then the inorganic encapsulation layer CVD formed subsequently will be prone to cracks at the lateral groove, thereby forming a water and oxygen invasion path.

[0056] In the present disclosure, as shown in FIG. 4b, since the buffer pattern HPT covers the edge of the first wire L1 located in the isolation groove GL, on the one hand, the buffer pattern HPT can protect the edge of the first wire L1 from being laterally etched in the etching process, which is conducive to improving the film forming quality of the inorganic encapsulation layer CVD and reducing the generation of defects and cracks, thereby blocking the invasion of water and oxygen. On the other hand, the buffer pattern HPT forms a gentle slope at the edge of the first wire L1, which can reduce the steepness at the edge of the first wire L1, further improving the film forming quality of the inorganic encapsulation layer CVD.

[0057] Exemplarily, the first wire L1 passing through the isolation groove GL is connected with the binding area BD and the display area AA respectively, as shown in FIG. 3, the first wire L1 is used to transmit the signal on the binding pin PIN in the binding area BD to the display area AA, and the first wire L1 is used to transmit, for example, a high-voltage signal VDD or a low-voltage signal VSS, and the like.

[0058] Exemplarily, as shown in FIG. 3, the protective glue MCL covers at least the surface of the bendable area BA away from the substrate substrate, and the orthographic projection of the protective glue MCL on the substrate substrate 31 covers the area between the isolation groove GL and the edge of the display substrate close to the bendable area BA, that is, the protective glue MCL is coated between the edge of the display substrate close to the bendable area BA and the isolation groove GL. The protective glue MCL is used to protect the bendable area BA and increase the strength of the bendable area BA.

[0059] Exemplarily, as shown in FIG. 3, the display substrate further comprises one or more isolation columns DAM located on the side of the isolation groove GL close to the display area AA. The plurality of isolation columns DAM are arranged in sequence along the direction of the line connecting the display area AA and the isolation groove GL, for example.

[0060] Exemplarily, as shown in FIG. 3, the display substrate comprises an encapsulation layer FZ, which comprises, for example, an inorganic encapsulation layer CVD1, an organic encapsulation layer and an inorganic encapsulation layer CVD2 arranged in sequence.

[0061] Exemplarily, the isolation column DAM is used to block the overflow of the organic encapsulation layer to prevent the formation of a water and oxygen invasion path.

[0062] Exemplarily, as shown in FIG. 3, the structure below the encapsulation layer FZ in the display substrate is a driving substrate, and the first metal layer M1 can be a metal layer arranged close to the encapsulation layer FZ in the driving substrate.

[0063] Exemplarily, the first metal layer M1 further comprises a data line located in the display area AA, that is, the data line is arranged in the same layer as the first trace L1.

[0064] Exemplarily, as shown in FIG. 4, the material of the first metal layer M1 comprises a first sub-layer 41, a second sub-layer 42 and a third sub-layer 43 arranged in sequence, and the lateral recess is mainly formed in the second sub-layer 42. The materials of the first sub-layer 41 and the third sub-layer 43 are titanium, for example, and the material of the second sub-layer 42 is aluminum, for example.

[0065] Exemplarily, as shown in FIG. 2, in the first direction f1, the orthographic projection of the edge of the first trace L1 on the substrate substrate 31 is arranged substantially in the center of the orthographic projection area of the buffer pattern HPT on the substrate substrate 31. The first direction f1 is perpendicular to the extension direction of the edge of the isolation groove GL where the first trace L1 is located.

[0066] Exemplarily, as shown in FIG. 2, the width w1 of the buffer pattern HPT along the first direction f1 is greater than or equal to 0.5 microns and less than or equal to 10 microns. Such a size of the buffer pattern HPT can effectively protect the edge of the first trace L1, and at the same time, it will not set too much organic material in the isolation groove GL to prevent water and oxygen from invading the display area AA through the buffer pattern HPT.

[0067] In some embodiments, as shown in FIG. 3, in the second direction f2, the positive projection of the buffer pattern HPT on the substrate 31 covers the isolation groove GL.

[0068] The second direction f2 is the direction in which the first trace L1 extends along the edge of the isolation groove GL. In FIG. 2, the second direction f2 is the direction of the line connecting the display area AA and the isolation groove GL.

[0069] Exemplarily, as shown in FIGS. 2 and 3, the buffer pattern HPT includes a first buffer pattern HPT1, which is disposed close to the bendable area BA. The first organic layer ORG1 further includes a first organic pattern OPT1, which is located between the isolation groove GL and the display area AA, and has a gap between the first organic pattern OPT1 and the first buffer pattern HPT1.

[0070] Since the first organic pattern OPT1 and the first buffer pattern HPT1 are separated from each other by the gap, the transmission path of water and oxygen from the first buffer pattern HPT1 to the first organic pattern OPT1 is cut off.

[0071] Exemplarily, in the second direction f2, the gap between the first organic pattern OPT1 and the first buffer pattern HPT1 has a size greater than or equal to 15 microns and less than or equal to 30 microns.

[0072] Such a gap size enables the first buffer pattern HPT1 to protect the edge of the first trace L1 to the greatest extent, while also avoiding the first organic pattern OPT1 and the first buffer pattern HPT1 from being connected to each other due to process errors, thereby preventing water and oxygen from invading the display area AA through the first buffer pattern HPT1.

[0073] Exemplarily, the first buffer pattern HPT1 has a width along the first direction f1, for example, greater than or equal to 2 microns and less than or equal to 5 microns, such as 3 microns.

[0074] Exemplarily, as shown in FIGS. 2 and 3, the first organic layer ORG1 further includes a second organic pattern OPT2, which is located between the isolation groove GL and the bendable area BA, and can be connected to the first buffer pattern HPT1.

[0075] Since the gap is not covered by the organic material, the inorganic encapsulation layer CVD at the gap between the first organic pattern OPT1 and the first buffer pattern HPT1 is prone to forming cracks or defects, which in turn can introduce water and oxygen.

[0076] To avoid forming a water-oxygen invasion path at the gap between the first organic pattern OPT1 and the first buffer pattern HPT1, the display substrate further includes, as shown in FIGS. 2 and 3, a blocking pattern ZD located in the non-display area AA and disposed on the side of the inorganic encapsulation layer CVD facing away from the substrate 31, wherein in the orthographic projection on the substrate 31, the blocking pattern ZD covers the gap between the first organic pattern OPT1 and the first buffer pattern HPT1 and the edge of the first trace L1 at the gap.

[0077] In this way, since the blocking pattern ZD covers the gap between the first organic pattern OPT1 and the first buffer pattern HPT1 and the edge of the first trace L1 at the gap, water-oxygen can be isolated outside the blocking pattern ZD, and water-oxygen invasion from the gap is avoided.

[0078] For example, the display area AA includes touch control traces, which are disposed in the same layer as the blocking pattern ZD and are made of the same material.

[0079] For example, the display substrate includes, in sequence, a touch control buffer layer, a first touch control trace layer, a touch control insulating layer, and a second touch control trace layer disposed on the side of the encapsulation layer FZ facing away from the substrate 31, the touch control buffer layer is disposed close to the substrate 31 and is used to improve the adhesion of the first touch control trace layer, the touch control insulating layer is used to separate the first touch control trace layer and the second touch control trace layer, and the first touch control trace layer and the second touch control trace layer are used to form touch control traces in the display area AA. In this case, the blocking pattern ZD can be located in the first touch control trace layer or the second touch control trace layer, that is, the blocking pattern ZD can be formed synchronously with the first touch control trace layer or the second touch control trace layer in a one-time patterning process.

[0080] For example, as shown in FIG. 2, the width of the blocking pattern ZD along the first direction f1 is greater than the width of the first buffer pattern HPT1 along the first direction f1. In this way, it can be ensured that the blocking pattern ZD can completely cover the gap between the first organic pattern OPT1 and the first buffer pattern HPT1 in the first direction f1, so that water-oxygen can be isolated outside the blocking pattern ZD, and water-oxygen invasion from the gap is avoided.

[0081] For example, as shown in FIG. 2, in the orthographic projection on the substrate 31, the blocking pattern ZD overlaps with the first organic pattern OPT1 and the first buffer pattern HPT1, respectively. That is, in the second direction f2, the size of the blocking pattern ZD is greater than the size of the gap between the first organic pattern OPT1 and the first buffer pattern HPT1. In this way, it can be ensured that the blocking pattern ZD can completely cover the gap between the first organic pattern OPT1 and the first buffer pattern HPT1 in the second direction f2, so that water-oxygen can be isolated outside the blocking pattern ZD, and water-oxygen invasion from the gap is avoided.

[0082] Referring to FIG. 5, b is a schematic diagram of a partial planar structure of a display substrate provided by the present disclosure, and a is an enlarged schematic diagram of the structure in the dashed-line frame k2 in b.

[0083] Exemplarily, as shown in FIG. 5, the buffer pattern HPT further comprises a second buffer pattern HPT2, the second buffer pattern HPT2 is located at the gap between the first organic pattern OPT1 and the first buffer pattern HPT1, and the width of the second buffer pattern HPT2 along the first direction f1 is less than or equal to the width of the first buffer pattern HPT1 along the first direction f1. Moreover, the second buffer pattern HPT2 has a breakpoint DD, and the second buffer pattern HPT2 located on the side close to the display area AA and the second buffer pattern HPT2 located on the side away from the display area AA are separated from each other at the breakpoint DD.

[0084] By setting the second buffer pattern HPT2, the second buffer pattern HPT2 covers the edge of the first wiring L1 at the gap, so as to protect the edge of the first wiring L1 at the gap, improve the film forming quality of the inorganic encapsulation layer CVD at the gap, and reduce the generation of defects and cracks, thereby blocking the invasion of water and oxygen. By setting the breakpoint DD in the second buffer pattern HPT2, the transmission path of water and oxygen from the first buffer pattern HPT1 to the first organic pattern OPT1 can be cut off.

[0085] Exemplarily, the first organic layer ORG1 can be formed by using a gray-tone mask plate, so that the thickness of the second buffer pattern HPT2 is less than the thickness of the first buffer pattern HPT1, and the width of the second buffer pattern HPT2 along the first direction f1 is less than the width of the first buffer pattern HPT1 along the first direction f1. Since the second buffer pattern HPT2 is both narrow and thin, it is beneficial to naturally form the breakpoint DD in the etching process.

[0086] Exemplarily, as shown in FIG. 2, in the second direction f2, the breakpoint DD is arranged substantially in the middle of the second buffer pattern HPT2, and from the breakpoint DD to the edge of the second buffer pattern HPT2, the width of the second buffer pattern HPT2 along the first direction f1 gradually increases.

[0087] Exemplarily, the width of the first buffer pattern HPT1 along the first direction f1 is greater than or equal to 0.5 microns and less than or equal to 10 microns. For example, the width of the first buffer pattern HPT1 along the first direction f1 is 5 microns or 3 microns, etc.

[0088] Exemplarily, as shown in FIG. 5, the width w2 of the second buffer pattern HPT2 along the first direction f1 is greater than or equal to 0.5 microns and less than or equal to 2 microns, for example. Further, the width of the second buffer pattern HPT2 along the first direction f1 is greater than or equal to 1 micron and less than or equal to 1.5 microns, for example. The above width range is advantageous for naturally forming the break point DD on the second buffer pattern HPT2 in the etching process without additional process to form the break point DD.

[0089] Referring to FIG. 6, b is a schematic diagram of a partial planar structure of a display substrate provided by the present disclosure, and a is an enlarged schematic diagram of the structure in the dashed box k3 in b.

[0090] In some other embodiments, as shown in FIGS. 6 and 7, in the second direction f2, the orthographic projection of the buffer pattern HPT on the substrate 31 completely covers the isolation groove GL. The buffer pattern HPT is in communication with both the first organic pattern OPT1 and the second organic pattern OPT2.

[0091] In this way, the buffer pattern HPT can completely cover the edge of the first trace L1 located in the isolation groove GL, avoiding the edge of the first trace L1 being laterally etched in the etching process, reducing the steepness of the edge of the first trace L1, improving the film forming quality of the inorganic encapsulation layer CVD, reducing the generation of defects and cracks, and thus blocking the water and oxygen from invading.

[0092] Exemplarily, as shown in FIG. 6, the first organic layer ORG1 further includes a water absorption pattern XS located in the isolation groove GL, the water absorption pattern XS is in communication with the buffer pattern HPT and located on the side of the buffer pattern HPT away from the first trace L1, and the water absorption pattern XS is separated from the first organic layer ORG1 located outside the isolation groove GL. The water absorption pattern XS can absorb the water and oxygen that can be transmitted to the display area AA, preventing the water and oxygen from entering the display area AA.

[0093] The first organic layer ORG1 located outside the isolation groove GL is, for example, the first organic pattern OPT1 and the second organic pattern OPT2, etc.

[0094] Exemplarily, as shown in FIG. 6, the display substrate further includes a water storage portion CS located in the isolation groove GL, the water storage portion CS is connected to the end of the water absorption pattern XS away from the buffer pattern HPT, the water storage portion CS is stacked on the side of the water absorption pattern XS close to and / or away from the substrate 31, and the water storage portion CS is separated from other patterns in the same layer.

[0095] The other patterns in the same layer refer to other patterns in the same layer as the water storage portion CS.

[0096] In a specific implementation, the water storage portion CS can be formed of a material that is easy to absorb water, for example, the water storage portion CS can be arranged in the same layer as the first wiring L1 and / or the anode of the light emitting device. The water storage portion CS can store water and oxygen in the water absorption pattern XS, and can function as a water reservoir.

[0097] As shown in FIG. 1, after the polarizer POL and the protective layer MCL are separated from each other, another path for water and oxygen to enter the display area AA is generated, as shown by the dashed arrow in FIG. 1. After the protective layer TOC absorbs water and oxygen in the air, the water and oxygen first transmit along the protective layer TOC to a side away from the isolation groove GL, then transmit to the organic layer ORG on a side close to the substrate 31, transmit along the organic layer ORG to a side close to the isolation groove GL, and then enter the display area AA from the crack of the encapsulation layer FZ.

[0098] To solve this problem, in some embodiments, as shown in FIG. 3, the display substrate further includes: an insulating layer TLD arranged on a side of the inorganic encapsulation layer CVD away from the substrate 31; and a protective layer TOC arranged on a side of the insulating layer TLD away from the substrate 31, the protective layer TOC including a first opening H1 that completely penetrates the protective layer TOC in a direction perpendicular to the substrate 31. The orthogonal projection of the first opening H1 on the substrate 31 is located on a side of the isolation groove GL away from the display area AA, and the orthogonal projection of the first opening H1 on the substrate 31 is located within the orthogonal projection area of the insulating layer TLD on the substrate 31.

[0099] By arranging the first opening H1 on the protective layer TOC, the path for water and oxygen to transmit along the protective layer TOC to a side away from the isolation groove GL can be cut off, and the water and oxygen can be prevented from entering the display area AA.

[0100] As shown in FIG. 3, in the orthogonal projection on the substrate 31, the first opening H1 does not overlap with the edge of the insulating layer TLD, and the edge of the insulating layer TLD is located on a side of the first opening H1 away from the isolation groove GL. In this way, the water and oxygen can be prevented from directly invading the inside of the display substrate from the first opening H1.

[0101] For example, as shown in FIG. 2, the first opening H1 penetrates the entire non-display area AA in the first direction f1. The protective layer TOC located on a side of the first opening H1 close to the display area AA and the protective layer TOC located on a side of the first opening H1 away from the display area AA are separated from each other at the first opening H1.

[0102] For example, as shown in FIG. 8, the cross-sectional structure of FIG. 2, FIG. 5, and FIG. 6 along the position of BB' is schematically shown.

[0103] For example, the insulating layer TLD includes a touch buffer layer and a touch insulating layer arranged in a stack, without specific limitation in the present disclosure.

[0104] Exemplarily, as shown in FIG. 3, the display substrate further comprises a pixel definition layer PDL which is arranged in a stack between the first organic layer ORG1 and the inorganic encapsulation layer CVD, and is configured to form a plurality of pixel openings in the display area AA, and the pixel definition layer PDL does not overlap with the first opening H1 in the orthographic projection on the substrate 31. In this way, water and oxygen can be prevented from entering the pixel definition layer PDL through the first opening H1, and the water and oxygen can be prevented from being transmitted to the display area AA through the pixel definition layer PDL.

[0105] Exemplarily, the first organic layer ORG1 further comprises a planar pattern (not shown in the figure) located in the display area AA, and the anode of the light-emitting device is arranged on the surface of the planar pattern away from the substrate 31, and the planar pattern is configured to planarize the surface on which the anode is arranged.

[0106] The display device provided by the present disclosure comprises the display substrate provided by any of the embodiments, the bendable area BA is bent to the side of the substrate 31 away from the display area AA, and the driving assembly is connected with the bendable area BA of the display substrate and is configured to drive the display substrate to emit light.

[0107] Those skilled in the art can understand that the display device provided by the present disclosure has the advantages of the display substrate of any of the above-mentioned embodiments.

[0108] The display device provided by the present disclosure can be any product or component with display function, such as a display module, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a vehicle-mounted display device, a smart watch, a fitness wristband, a personal digital assistant, etc.

[0109] In the present disclosure, the meaning of "a plurality of" is two or more, and the meaning of "at least one" is one or more, unless otherwise explicitly specified.

[0110] In the present disclosure, the terms "upper", "lower", etc. indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0111] In the present disclosure, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, product or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, product or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, product or device including the element.

[0112] As used in the present disclosure, "one embodiment", "some embodiments", "an exemplary embodiment", "one or more embodiments", "an example", "one example", "some examples" and the like are utilized to merely refer to a specific feature, structure, material, or characteristic included in at least one embodiment or example of the present disclosure. Thus, the appearances of such phrases in various places throughout this specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0113] In the present disclosure, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

[0114] In the present specification, "electrically connected" and "coupled" include cases where constituent elements are connected together through an element having some electrical action. The element having some electrical action is not particularly limited as long as it can perform the transmission and reception of electrical signals between the connected constituent elements. Examples of the element having some electrical action include not only electrodes and wiring but also switching elements such as transistors, resistors, inductors, capacitors, other elements having various functions, and the like.

[0115] In the present specification, "disposed in the same layer" means structures patterned by the same patterning process, and the materials thereof can be the same or different. For example, the materials of the precursors forming the multiple structures disposed in the same layer are the same, and the materials of the finally formed structures can be the same or different.

[0116] In the present specification, a polygon is not strictly a triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, and the like, and can be an approximate triangle, a rectangle, a trapezoid, a pentagon, or a hexagon, and the like, and can have some small deformation due to a tolerance, and can have a chamfer, a round corner, an arc edge, and a deformation, and the like.

[0117] "A, B, and C at least one of" has the same meaning as "at least one of A, B, or C", and includes the following combinations of A, B, and C: only A, only B, only C, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0118] "A and / or B" includes the following three combinations: only A, only B, and a combination of A and B.

[0119] The use of "for" or "configured to" in the present disclosure means open and inclusive language that does not exclude devices that are adapted to perform additional tasks or steps.

[0120] As used in the present disclosure, "about," "approximately," or "around" includes the recited value and the average value within an acceptable range of deviation from the particular value, as determined by one of ordinary skill in the art taking into account the measurement being discussed and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0121] As used in the present disclosure, "parallel," "perpendicular," "equal," "flush" includes the recited condition and conditions that approximate the recited condition, the approximation being within an acceptable range of deviation, as determined by one of ordinary skill in the art taking into account the measurement being discussed and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and near parallel, where the acceptable range of deviation for near parallel can be, for example, within 10° or 5°; "perpendicular" includes absolute perpendicular and near perpendicular, where the acceptable range of deviation for near perpendicular can also be, for example, within 10° or 5°. "Equal" includes absolute equality and near equality, where the acceptable range of deviation for near equality can be, for example, a difference between the two that is less than or equal to 5% of either. "Flush" includes absolute flush and near flush, where the acceptable range of deviation for near flush can be, for example, a distance between the two that is less than or equal to 5% of either dimension.

[0122] It will be understood that when a layer or element is referred to as being "on" another layer or substrate, it can be directly on the other layer or substrate, or intervening layers can also be present.

[0123] The present disclosure describes example embodiments with reference to cross-sectional and / or plan view illustrations that are idealized example diagrams. In the interest of clarity, not all of the layer and regions are shown in each diagram. For example, while a layer of a first material can be shown as being on a layer of a second material, it will be understood that a thin interfacial layer can also be present. Thus, the examples are not intended to be limited to the materials, dimensions, shapes, and relative placement of the regions as shown in the drawings. Rather, the examples are intended to be illustrative of exemplary embodiments that are not limited to the precise shapes, relative placement, and dimensions shown in the drawings. In addition, the drawings are not necessarily drawn to scale.

[0124] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A display substrate, comprising a display area and a non-display area located at least one side of the display area, the non-display area comprising an isolation groove and a bendable area, the isolation groove being located between the display area and the bendable area, the display substrate comprising: a substrate substrate, and a first metal layer, an inorganic encapsulation layer and a plurality of organic layers which are sequentially arranged on one side of the substrate substrate, the plurality of organic layers comprising a first organic layer, the first organic layer being sequentially arranged between the first metal layer and the inorganic encapsulation layer, and a projection of at least one organic layer other than the first organic layer on the substrate substrate has no overlap with the isolation groove; the first metal layer comprises a first trace passing through the isolation groove, the first organic layer comprises a buffer pattern located at the isolation groove, the buffer pattern covering an edge of the first trace located at the isolation groove, and a projection of the buffer pattern and the inorganic encapsulation layer on the substrate substrate has overlap. In an extension direction of the edge of the first trace located at the isolation groove, a projection of the buffer pattern on the substrate substrate covers the isolation groove. The buffer pattern comprises a first buffer pattern, the first buffer pattern being arranged close to the bendable area; 2.The display substrate of claim 1, wherein, The first organic layer further comprises a first organic pattern, the first organic pattern being located between the isolation groove and the display area, and a gap being formed between the first organic pattern and the first buffer pattern. 3.The display substrate of claim 2, wherein, The display substrate further comprises: a blocking pattern arranged on a side of the inorganic encapsulation layer away from the substrate substrate, and in a projection on the substrate substrate, the blocking pattern covers the gap and an edge of the first trace at the gap. A width of the blocking pattern along a first direction is greater than a width of the first buffer pattern along the first direction, and the first direction is perpendicular to an extension direction of the edge of the first trace located at the isolation groove. 4.The display substrate of claim 3, wherein, The buffer pattern further comprises a second buffer pattern, the second buffer pattern being located at the gap, and a width of the second buffer pattern along a first direction is less than or equal to a width of the first buffer pattern along the first direction, and the first direction is perpendicular to the extension direction of the edge of the first trace located at the isolation groove; The second buffer pattern has a breakpoint, and a second buffer pattern located on one side of the breakpoint close to the display area and a second buffer pattern located on one side of the breakpoint away from the display area are separated from each other at the breakpoint. 5.The display substrate of claim 4, wherein, In the extension direction of the edge of the first trace located at the isolation groove, the breakpoint is arranged substantially in the middle of the second buffer pattern, and from the breakpoint to an edge of the second buffer pattern, a width of the second buffer pattern along the first direction gradually increases. 6.The display substrate of claim 3, wherein, In the extension direction of the edge of the first trace located at the isolation groove, a size of the gap is greater than or equal to 15 microns and less than or equal to 30 microns. In the extension direction of the edge of the first trace located at the isolation groove, a projection of the buffer pattern on the substrate substrate completely covers the isolation groove. 7.The display substrate of claim 6, wherein, ​ 8.The display substrate of claim 3, wherein, ​ 9.The display substrate of claim 1, wherein, ​ 10.The display substrate of claim 1, wherein, The first organic layer further comprises a water absorption pattern located in the isolation groove, the water absorption pattern is in communication with the buffer pattern, and is located on a side of the buffer pattern away from the first trace, and the water absorption pattern is separated from the first organic layer outside the isolation groove. 11.The display substrate of claim 10, wherein, The display substrate further comprises: a water storage portion located in the isolation groove, the water storage portion is connected to an end of the water absorption pattern away from the buffer pattern, and the water storage portion is stacked on a side of the water absorption pattern close to and / or away from the substrate, and is separated from other patterns in the same layer. 12.The display substrate of claim 1, wherein, In a first direction, a projection of an edge of the first trace on the substrate is substantially centrally located in a projection area of the buffer pattern on the substrate, and the first direction is perpendicular to an extension direction of an edge of the first trace located in the isolation groove. 13.The display substrate of claim 1, wherein, A width of the buffer pattern in a first direction is greater than or equal to 0.5 microns and less than or equal to 10 microns, and the first direction is perpendicular to an extension direction of an edge of the first trace located in the isolation groove. 14.The display substrate according to any one of claims 1 to 13, wherein The display substrate further comprises: an insulating layer located on a side of the inorganic encapsulation layer away from the substrate; and a protective layer located on a side of the insulating layer away from the substrate, the protective layer comprises a first opening, the first opening completely penetrates the protective layer in a direction perpendicular to the substrate; and a projection of the first opening on the substrate is located on a side of the isolation groove away from the display area, and the projection of the first opening on the substrate is located in a projection area of the insulating layer on the substrate. 15.The display substrate of claim 14, wherein, The display substrate further comprises: a pixel definition layer stacked between the first organic layer and the inorganic encapsulation layer, for forming a plurality of pixel openings in the display area, and the pixel definition layer does not overlap with the projection of the first opening on the substrate.

16. A display device, comprising: the display substrate according to any one of claims 1 to 15, the bendable area is bent to a side of the display substrate away from the display area; and a driving assembly connected to the bendable area of the display substrate, for driving the display substrate to emit light.

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