Hybrid OLED display substrate and preparation method thereof, hybrid OLED display motherboard

Abstract

The present invention provides a hybrid OLED display substrate and a preparation method thereof, and a hybrid OLED display motherboard. The OLED display substrate includes: a glass substrate; an inorganic layer arranged on the glass substrate; a light-emitting device layer, which is in a display area and includes a plurality of OLED light-emitting devices; a cofferdam structure, which is arranged to extend around the display area; an internal encapsulation layer, which is in the display area and the encapsulation transition area, and covers a plurality of OLED devices and the cofferdam structure; a crack blocking dam structure, which is arranged in the inorganic layer; an encapsulation protection layer, which covers the internal encapsulation layer and the crack blocking dam structure, wherein the crack blocking dam structure includes a crack blocking channel arranged in the inorganic layer and extending along the thickness direction of the inorganic layer, and the orthographic projection of each crack blocking channel on the glass substrate includes a first corner, a second corner, a third corner, and a fourth corner, and each corner is arranged to be indented toward the display area.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a hybrid OLED display substrate and a preparation method thereof, and a hybrid OLED display motherboard. Background Art

[0002] The hybrid OLED display substrate includes a lower glass substrate for supporting the light-emitting device layer including the OLED light-emitting device and a thin film encapsulation layer (TFE) for encapsulating the light-emitting device layer. For this kind of rigid and flexible product, the encapsulation is very susceptible to processes such as laser cutting, thinning, and wheel cutting, which can lead to encapsulation failure, thus allowing external water and oxygen to invade, oxidize the light-emitting material, and cause the light-emitting device to fail and fail to emit light. This effect is almost irreversible, and usually the only way to deal with it is to replace the display screen. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art, and proposes a hybrid OLED display substrate and a preparation method thereof, and a hybrid OLED display motherboard.

[0004] According to a first aspect of the present invention, a hybrid OLED display substrate is provided, comprising a display area, a packaging transition area surrounding the display area, and an edge area surrounding the packaging transition area; the hybrid OLED display substrate comprises: a glass substrate; an inorganic layer arranged on the glass substrate; a light-emitting device layer, located in the display area, arranged on a side of the inorganic layer away from the glass substrate, the light-emitting device layer comprising a plurality of OLED light-emitting devices; a cofferdam structure, located in the packaging transition area, arranged to extend around the display area; an internal packaging layer, located in the display area and the packaging transition area, covering the plurality of OLED light-emitting devices and the cofferdam structure; a crack blocking dam structure, arranged in the display area and the packaging transition area, covering the plurality of OLED light-emitting devices and the cofferdam structure; and a crack blocking dam structure, arranged in the display area and the packaging transition area. The inorganic layer; and an encapsulation protection layer covering the internal encapsulation layer and the crack blocking dam structure, wherein the crack blocking dam structure includes at least one crack blocking channel extending along the thickness direction of the inorganic layer, each of the at least one crack blocking channel is composed of a groove formed in the inorganic layer and an organic material filled in the groove, and the orthographic projection of each of the at least one crack blocking channel on the glass substrate extends around the orthographic projection of the cofferdam structure on the glass substrate, and the orthographic projection of each of the at least one crack blocking channel on the glass substrate includes a first side and a second side extending along a first direction, and a first side and a second side extending along a first direction. a third side and a fourth side, a first corner, a second corner, a third corner and a fourth corner extending in a second direction intersecting the first direction, wherein the first corner is connected between the first side and the third side, the second corner is connected between the third side and the second side, the third corner is connected between the second side and the fourth side, and the fourth corner is connected between the fourth side and the first side, wherein the at least one crack blocking channel comprises a distal crack blocking channel farthest from the display area, and the extended lines of the first side, the third side, the second side and the fourth side of the distal crack blocking channel respectively intersect to form a quadrilateral, and intersect at the first intersection, the second intersection and the fourth intersection, respectively. A fork, a third intersection and a fourth intersection, the first corner, the second corner, the third corner and the fourth corner are all located inside the quadrilateral; and the closest distance between the first corner and the first intersection is at least 1 / 3 of the closest distance between the first intersection and the display area; the closest distance between the second corner and the second intersection is at least 1 / 3 of the closest distance between the second intersection and the display area; the closest distance between the third corner and the third intersection is at least 1 / 3 of the closest distance between the third intersection and the display area; and the closest distance between the fourth corner and the fourth intersection is at least 1 / 3 of the closest distance between the fourth intersection and the display area.

[0005] In some embodiments, the distance between the first endpoint of the first edge near the first intersection and the first intersection is equal to the distance between the first end of the third edge near the first intersection and the first intersection; the distance between the second endpoint of the third edge near the second intersection and the second intersection is equal to the distance between the first end of the second edge near the second intersection and the second intersection; the distance between the second endpoint of the second edge near the third intersection and the third intersection is equal to the distance between the second end of the fourth edge near the third intersection and the third intersection; and the distance between the first endpoint of the fourth edge near the fourth intersection and the fourth intersection is equal to the distance between the second end of the first edge near the fourth intersection and the fourth intersection.

[0006] In some embodiments, the closest distance between the first corner and the first intersection is greater than or equal to the distance between the first endpoint of the first side close to the first intersection and the first intersection; the closest distance between the second corner and the second intersection is greater than or equal to the distance between the second endpoint of the third side close to the second intersection and the second intersection; the closest distance between the third corner and the third intersection is greater than or equal to the distance between the second endpoint of the second side close to the third intersection and the third intersection; and the closest distance between the fourth corner and the fourth intersection is greater than or equal to the distance between the first endpoint of the fourth side close to the fourth intersection and the fourth intersection.

[0007] In some embodiments, the quadrilateral is a rectangle; the point on the first corner that is closest to the first intersection is at the midpoint of the hypotenuse of the right triangle formed by the first endpoint of the first side, the first intersection and the first endpoint of the third side; the point on the second corner that is closest to the second intersection is at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the third side, the second intersection and the first endpoint of the second side; the point on the third corner that is closest to the third intersection is at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the second side, the third intersection and the second endpoint of the fourth side; and the point on the fourth corner that is closest to the fourth intersection is at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the first side, the fourth intersection and the first endpoint of the fourth side.

[0008] In some embodiments, the point on the first corner that is closest to the first intersection is set on a side of the packaging transition area away from the display area; the point on the second corner that is closest to the second intersection is set on a side of the packaging transition area away from the display area; the point on the third corner that is closest to the third intersection is set on a side of the packaging transition area away from the display area; and the point on the fourth corner that is closest to the fourth intersection is set on a side of the packaging transition area away from the display area.

[0009] In some embodiments, the at least one crack blocking channel includes a plurality of crack blocking channels, the plurality of crack blocking channels include the distal crack blocking channel and at least one proximal crack blocking channel close to the display area relative to the distal crack blocking channel; the plurality of crack blocking channels extend in parallel around the display area, and the distance between each two adjacent crack blocking channels is the same; the point on the first corner of each of the plurality of crack blocking channels that is closest to the first intersection point is projected on the glass substrate within the packaging transition area and on the side of the projection of the cofferdam structure on the glass substrate that is away from the display area; the point on the second corner of each of the plurality of crack blocking channels that is closest to the first intersection point is projected on the glass substrate within the packaging transition area and on the side of the projection of the cofferdam structure on the glass substrate that is away from the display area; The orthographic projection of the point closest to the second intersection on the glass substrate is within the packaging transition area and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area; the orthographic projection of the point on the third corner of each of the multiple crack blocking channels that is closest to the third intersection on the glass substrate is within the packaging transition area and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area; and the orthographic projection of the point on the fourth corner of each of the multiple crack blocking channels that is closest to the fourth intersection on the glass substrate is within the packaging transition area and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area.

[0010] In some embodiments, the internal encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; the first inorganic encapsulation layer is arranged in the display area and the encapsulation transition area, covering each of the first corner, the second corner, the third corner and the fourth corner and covering the multiple OLED light-emitting devices; the organic encapsulation layer is arranged in the display area, covering a portion of the first inorganic encapsulation layer in the display area; and the second inorganic encapsulation layer is arranged in the display area and the encapsulation transition area, covering the organic encapsulation layer and a portion of the first inorganic encapsulation layer in the encapsulation transition area.

[0011] In some embodiments, the first side, the second side, the third side, and the fourth side are in the edge region.

[0012] In some embodiments, each of the first corner, the second corner, the third corner, and the fourth corner includes an arc that is generally protruding toward the display area.

[0013] In some embodiments, each of the first corner, the second corner, the third corner, and the fourth corner includes a plurality of arcs connected end to end, and each arc protrudes toward the display area.

[0014] In some embodiments, each of the first corner, the second corner, the third corner, and the fourth corner includes a plurality of arcs and a plurality of line segments connected end to end; and the plurality of arcs protrude toward the display area.

[0015] In some embodiments, the multiple arcs and the multiple line segments include a first line segment connected end to end, a plurality of arcs, and a second line segment, the multiple arcs connected end to end and connected between the first line segment and the second line segment; one end of the first line segment not connected to the multiple arcs serves as one end of the corner, and the other end of the first line segment is connected to one end of the multiple arcs connected end to end; and the other end of the multiple arcs connected end to end is connected to one end of the second line segment, and the other end of the second line segment not connected to the multiple arcs serves as the other end of the corner.

[0016] In some embodiments, the plurality of end-to-end circular arcs include an even number of end-to-end circular arcs; and the plurality of end-to-end circular arcs have the same radius of curvature and arc length.

[0017] In some embodiments, each of the first corner, the second corner, the third corner and the fourth corner includes a broken line structure, which protrudes toward the display area as a whole; the broken line structure includes a plurality of line segments connected end to end, the first ends of the plurality of line segments connected end to end serve as one end of the corner, and the second ends of the plurality of line segments connected end to end serve as the other end of the corner; the angle between each two adjacent line segments in the plurality of line segments is an obtuse angle or a right angle; and the angle between the first ends of the plurality of line segments connected end to end and the corresponding sides of the first side, the second side, the third side and the fourth side connected to the corner and the angle between the second ends of the plurality of line segments connected end to end and the corresponding sides of the first side, the second side, the third side and the fourth side connected to the corner are both obtuse angles or right angles.

[0018] In some embodiments, the minimum distance between the first corner, the second corner, the third corner and the fourth corner of the crack blocking channel closest to the display area in the at least one crack blocking channel and the display area is greater than or equal to the minimum distance between the first side, the second side, the third side and the fourth side of the crack blocking channel and the display area.

[0019] In some embodiments, the minimum distance between the first corner, the second corner, the third corner and the fourth corner of the crack blocking channel closest to the display area in the at least one crack blocking channel and the display area ranges from 50µm to 70µm.

[0020] According to a second aspect of the present invention, a hybrid OLED display motherboard is provided, comprising a plurality of hybrid OLED display substrates as described in the above embodiment arranged in a multi-row and multi-column array on a glass substrate, the hybrid OLED display motherboard further comprising: two row-direction laser cutting paths extending along the row direction and respectively close to each row of hybrid OLED display substrates between each two adjacent rows of hybrid OLED display substrates, a row-direction cutter wheel cutting path between the two row-direction laser cutting blades; and a row-direction cutter wheel cutting path extending along the column direction and respectively close to each row of hybrid OLED display substrates between each two adjacent columns of hybrid OLED display substrates. Two column-wise laser cutting lanes respectively close to each column of hybrid OLED display substrates, and a column-wise cutter wheel cutting lane between the two column-wise laser cutting blades; wherein the intersection of each column-wise laser cutting lane and each row-wise laser cutting lane is a laser cross carbon point, and each of the first corner, the second corner, the third corner, and the fourth corner of the distal crack blocking channel included in each of the plurality of hybrid OLED display substrates is arranged between the closest laser cross carbon point and the display area of ​​the hybrid OLED display substrate.

[0021] In some embodiments, the laser cross carbon point closest to each of the first corner, the second corner, the third corner and the fourth corner of the distal crack blocking channel included in each of the multiple hybrid OLED display substrates coincides with a corresponding one of the first intersection point, the second intersection point, the third intersection point and the fourth intersection point.

[0022] According to a third aspect of the present invention, a method for preparing a hybrid OLED display substrate is provided, comprising: setting positions of a plurality of hybrid OLED display substrates to be formed, a plurality of laser cutting paths in the row direction and a plurality of laser cutting paths in the column direction to be singulated, and a cutter wheel cutting path between every two adjacent laser cutting paths on a glass substrate, and determining the intersection of the laser cutting paths in the row direction and the laser cutting paths in the column direction as a laser cross carbon point; forming an inorganic layer on the glass substrate, and setting a display area, a packaging transition area and an edge area of ​​each hybrid OLED display substrate to be formed; forming a laser cross carbon point in the inorganic layer and at the periphery of each hybrid OLED display substrate to be formed; A plurality of grooves extending in a thickness direction, wherein each groove includes a first side and a second side extending in a row direction, a third side and a fourth side extending in a column direction, a first corner between the first side and the third side, a second corner between the third side and the second side, a third corner between the second side and the fourth side, a fourth corner between the fourth side and the first side, and each of the first corner, the second corner, the third corner and the fourth corner of a distal groove farthest from the display area among the plurality of grooves is arranged between the laser cross carbon point closest to it and the display area of ​​the corresponding hybrid OLED display substrate to be formed; for each hybrid OLED display substrate , forming a light-emitting device layer in the display area of ​​the hybrid OLED display substrate to be formed on the inorganic layer, forming a cofferdam structure surrounding the display area in the encapsulation transition area and forming a planarization layer in the display area using an organic material, and filling the plurality of grooves with the organic material of the planarization layer to form a plurality of crack blocking channels of the crack blocking dam structure surrounding the display area, wherein the light-emitting device layer includes a plurality of OLED light-emitting devices; forming a first inorganic encapsulation layer on the display area and the encapsulation transition area of ​​each hybrid OLED display substrate, forming an organic encapsulation layer on the first inorganic encapsulation layer in the display area, and forming a second inorganic encapsulation layer on the first inorganic encapsulation layer and the organic encapsulation layer , thereby forming an internal packaging structure in the display area and the packaging transition area; forming a packaging film layer covering the entire structure, thereby forming a hybrid OLED display motherboard, on which a plurality of rows and columns of hybrid OLED display substrates arranged in an array are formed; cutting along the laser cutting road, and then removing the portion of the cut packaging film layer material between two adjacent laser cutting roads, exposing the cutter wheel cutting road between the two adjacent laser cutting roads; and cutting along the cutter wheel cutting road to cut off the glass substrate between two adjacent hybrid OLED display substrates, so as to separate a single hybrid OLED display substrate to form an independent hybrid OLED display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic plan view of an OLED display substrate according to an embodiment of the present disclosure is shown;

[0025] Figure 2 A schematic diagram showing the structure of a hybrid OLED display substrate of the related art is shown;

[0026] Figure 3 A schematic plan view of a hybrid OLED display motherboard according to an embodiment of the present disclosure and a portion of the encapsulation protection layer material after the laser cutting process is removed is shown;

[0027] Figure 4 An enlarged schematic diagram of a hybrid OLED display motherboard and an OLED display substrate after a portion of the encapsulation protective layer material is torn off after a laser cutting process in the related art is shown;

[0028] Figure 5 A schematic diagram showing a laser cutting process for a hybrid OLED display motherboard according to an embodiment of the present disclosure is shown;

[0029] Figure 6 A schematic diagram showing a process of tearing off a portion of the encapsulation protection layer on a hybrid OLED display motherboard after a laser cutting process is performed according to an embodiment of the present disclosure;

[0030] Figure 7 A schematic diagram showing a laser cutting process and a knife wheel cutting process for a hybrid OLED display motherboard according to an embodiment of the present disclosure is shown;

[0031] Figure 8 It shows the single chip formation in the related art Figure 2 Schematic diagram of the influence of laser cutting on the crack barrier structure of the hybrid OLED display substrate shown in FIG.

[0032] Fig. 9 and Fig.10 A cross-sectional view and a schematic plan view of a hybrid OLED display substrate according to an embodiment of the present disclosure are respectively shown;

[0033] Fig.11 A schematic plan view of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown;

[0034] Fig.12 and Fig.13Schematic diagrams of laser cutting process for a hybrid OLED display substrate according to an embodiment of the present disclosure are respectively shown;

[0035] Fig.14 , Fig.15 , Fig.16 , Fig.17 and Fig.18 The schematic diagrams of the structure of the hybrid OLED display substrate according to the embodiments of the present disclosure are shown respectively; and

[0036] Fig.19 A flow chart of a method for preparing a hybrid OLED display substrate according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0038] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Unless otherwise defined, the terms used in the embodiments of the present invention should be understood by those skilled in the art in terms of their usual meanings. The "first", "second" and similar words used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, "include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical connections or mechanical connections, and may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative position relationship between two objects. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0040] As used herein, "parallel" and "perpendicular" include the described situation and the situation similar to the described situation, and the range of the similar situation is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person skilled in the art taking into account the measurement being discussed and the error associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" or "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°.

[0041] It should be understood that when a layer or an element is formed on another layer or substrate, the layer or element may be directly on the other layer or substrate, or may be disposed on the other layer or substrate via an intermediate layer.

[0042] Exemplary embodiments of the present invention are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of certain layers and certain areas is exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the areas shown herein, but include shape deviations due to, for example, manufacturing. Therefore, the areas shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of areas of the device, and are not intended to limit the scope of the exemplary embodiments.

[0043] As mentioned above, the hybrid OLED display substrate includes a light-emitting device layer formed on a glass substrate or a plastic substrate and a thin film encapsulation layer (TFE) covering the light-emitting device layer, such as a thin film encapsulation layer formed by stacking an inorganic layer, an organic layer and an inorganic layer. Different from the flexible OLED display substrate, the glass substrate in the hybrid OLED display substrate replaces the polyimide (PI) substrate of the flexible OLED display substrate; different from the rigid OLED, the hybrid OLED substrate does not use glass as the top plate encapsulation, but uses a thin film encapsulation layer to encapsulate the entire substrate. In this rigid and flexible product structure, the encapsulation will be affected by new processes (such as laser cutting, thinning, wheel cutting (using a glass knife to cut the glass substrate) and other processes), resulting in encapsulation failure and GDS (indicating that water vapor intrusion causes the luminescent material to be oxidized, resulting in reduced luminous efficiency or even complete failure) and other display problems. The occurrence of GDS problems is irreversible, and the only option is to replace the screen.

[0044] Due to the above-mentioned specific preparation process of the hybrid OLED display substrate: in the process of cutting a single hybrid OLED display substrate from the hybrid OLED display motherboard, two different cutting processes are included. In order to avoid the cracks (Crack) that may be generated in the cutting process from extending to the display area AA through the inorganic layer on the glass substrate, thereby causing black spots and other defects in the display area AA, affecting the product quality, and the problem of low product reliability, the packaging structure at the edge area of ​​the hybrid OLED display substrate is designed with a step difference, that is, the internal packaging structure including the first inorganic packaging layer, the organic packaging layer and the second inorganic packaging layer usually does not extend to the edge area, but is limited to being set in the packaging transition area and the display area. In addition, a crack blocking dam structure (Crack Dam structure, also called a crack dam structure) is set in the inorganic layer of the edge area outside the packaging transition area to prevent the cracks that may be generated in the cutting process from entering the display area through the inorganic layer. However, there is a step difference between this Crack Dam structure and the internal packaging structure, and the Crack Dam structure will occupy a large area, which is not conducive to the realization of a narrow frame.

[0045] Specifically, Figure 1 A schematic plan view of a hybrid OLED display substrate is shown. Figure 2 The related art shows Figure 1 The structural diagram of the AA' line of the hybrid OLED display substrate shown in FIG. Figure 1 and Figure 2 As shown, the hybrid OLED display substrate is generally divided into a display area AA, a packaging transition area BB surrounding the display area AA, and an edge area CC surrounding the packaging transition area BB.

[0046] like Figure 1 and Figure 2 The hybrid OLED display substrate shown includes a glass substrate GLASS, a barrier layer BARRIER disposed on the glass substrate GLASS, and a buffer layer BUFFER disposed on the barrier layer BARRIER. The materials of the barrier layer BARRIER and the buffer layer BUFFER can be selected from inorganic materials, such as amorphous silicon (a-Si), silicon nitride (SiNx), silicon oxide (SiOx), which constitute the inorganic layer disposed on the glass substrate as described above.

[0047] A light-emitting device layer RGB is provided in the display area AA, including a plurality of pixels, such as a red pixel R, a green pixel G, and a blue pixel B. In one embodiment, each pixel may include an organic light-emitting diode (OLED) device, so the hybrid display substrate formed is a hybrid OLED display substrate. As known to those skilled in the art, before forming the OLED light-emitting device, a pixel driving circuit for driving the OLED light-emitting device to emit light is also formed, for example, including a gate insulating layer, a gate, an active layer, a source-drain layer, an interlayer dielectric layer, etc., which form a driving transistor. Figure 2 As shown, a planarization layer PLN is disposed between adjacent OLED light-emitting devices R, G, and B to planarize the light-emitting device layer, thereby facilitating the formation of a subsequent internal encapsulation layer.

[0048] exist Figure 2 In the hybrid OLED display substrate shown, two cofferdams DAM extending around the display area AA are arranged in the package transition area BB, and each cofferdam DAM may be continuous or discontinuous. Figure 2 The cross-sections of the two cofferdams DAM shown in the figure are both trapezoidal and have the same height. The present invention is not limited thereto, and cofferdams DAM of different heights may be provided, for example, the cofferdam DAM close to the display area AA may be provided at a lower height than the cofferdam DAM far from the display area AA. In one embodiment, the planarization layer PLN and the cofferdam DAM provided around the display area AA may be formed simultaneously by a single patterning process using the same material.

[0049] In the display area AA and the package transition area BB, an internal package structure is formed on the bank DAM, the light emitting device layer RGB and the planarization layer PLN. Figure 2As shown, the internal packaging structure includes a first inorganic packaging layer CVD1, an organic packaging layer IJP and a second inorganic packaging layer CVD2. The first inorganic packaging layer CVD1 and the second inorganic packaging layer CVD2 are mainly used for water and oxygen barrier to ensure the life of the OLED light-emitting device. The organic packaging layer IJP mainly bears the role of stress release and flattening between the first inorganic packaging layer CVD1 and the second inorganic packaging layer CVD2. Exemplarily, the first inorganic packaging layer CVD1 and / or the second inorganic packaging layer CVD2 include but are not limited to a combination of one or more of silicon nitride, silicon oxide, silicon oxynitride, aluminum oxide, titanium oxide, etc. The preparation of the first inorganic packaging layer CVD1 and / or the second inorganic packaging layer CVD2 can be prepared by but is not limited to plasma enhanced chemical vapor deposition (PECVD), sputtering, atomic vapor deposition preparation, vacuum evaporation, flash evaporation or transfer printing. Exemplarily, the preparation of the organic packaging layer IJP can be prepared by inkjet printing, screen printing or dispensing. For example, the refractive index and thickness of the first inorganic encapsulation layer CVD1, the second inorganic encapsulation layer CVD2 and the organic encapsulation layer IJP may be selected according to the requirements of practical applications, and the present invention is not limited thereto.

[0050] As mentioned above, in Figure 1 and Figure 2 In the hybrid OLED display substrate of the related art shown, cracks may be generated during the cutting process of the OLED display motherboard being singulated to form a single hybrid OLED display substrate, and cracks may be generated at the periphery of the display substrate as the use time of the single hybrid OLED display substrate increases. These cracks may pass through the inorganic layer 2 (e.g. Figure 2 The barrier layer BARRIER and buffer layer BUFFER shown in the figure extend to the display area AA, causing poor display. In order to solve this problem, a Crack Dam structure (crack dam structure) extending around the display area AA is also provided in the inorganic layer (barrier layer BARRIER and buffer layer BUFFER) of the edge area CC of the display panel to prevent the crack from extending to the inner display area AA. The Crack Dam structure may include multiple channel Crack Dams arranged around the display area AA. Exemplary, Figure 2 The Crack Dam structure shown in the figure includes 4 filling channel Crack Dams, but the present invention is not limited thereto, for example, 3 or 5 filling channel Crack Dams may be provided. The reason for providing multiple Crack Dams is to ensure that if one cutting channel fails to stop the crack propagation, the subsequent cutting channels will effectively prevent the cracks from extending along the inorganic layer 2 to the display area AA.

[0051] During the preparation process, for example, a portion of inorganic material in the inorganic layer 2 on the glass substrate GLASS is removed by an exposure, etching and development process to form a plurality of grooves, which extend around the display area AA. During the preparation process, organic material may be filled in these grooves to form a plurality of crack blocking channels Crack Dam. Figure 2 In the illustrated embodiment, for example, the same process can be used to fill multiple grooves to form multiple crack blocking channels Crack Dam when forming the planarization layer PLN, so that the formed Crack Dam structure is a crack blocking channel formed in the inorganic layer filled with organic material. This structure in which inorganic and organic materials are alternately arranged can better prevent the propagation of cracks. However, the present disclosure is not limited to this, and other materials can also be used to fill the grooves formed in the inorganic layer to form a Crack Dam structure. Using organic materials to disconnect the continuation of the inorganic layer can effectively block the cracks Crack from the outside and better prevent the cracks Crack from extending to the display area AA.

[0052] Exemplarily, a packaging protection layer TPF covering the entire display area AA, the packaging transition area BB and the edge area CC is also formed on the entire OLED display substrate, and includes, for example, a PET (polyethylene terephthalate) film material, which is used to cover multiple pixels in the display area AA, the dam DAM of the packaging transition area BB and the Crack Dam structure of the edge area CC, to package the OLED display substrate to further prevent external substances such as water and oxygen from entering the display area AA, and to protect the internal packaging structure covered by it from laser cutting in subsequent processes and the influence of foreign matter in the external environment, thereby ensuring the reliability of the OLED device and supporting the display substrate during the manufacturing process.

[0053] As described above, the structure of the hybrid OLED display substrate of the related art is introduced. Figure 2 As shown, since the Crack Dam structure (crack dam structure) for preventing cracks Crack from outside the display substrate from entering the display area AA along the inorganic layer is arranged in the edge area CC and occupies a certain area, the OLED display substrate of this structure is not conducive to achieving a narrow frame.

[0054] In addition, as mentioned above, the light-emitting device layer in the hybrid OLED display substrate is sandwiched between the glass substrate GLASS and the encapsulation protection layer TPF. Therefore, in the preparation process of singulating the hybrid OLED display substrate from the hybrid OLED display motherboard, two different cutting processes are required to cut the encapsulation protection layer TPF and the glass substrate GLASS in sequence. Therefore, for the hybrid OLED display substrate, the two cuts in the preparation process are more likely to cause cracks. In addition, as the use time increases, cracks are more likely to occur, so a more reliable Crack Dam structure is needed to avoid the possibility of external cracks being transmitted through the inorganic layer to the inside of the OLED display substrate, causing damage to the light-emitting device.

[0055] Figures 3 to 6 The schematic diagram of the preparation process of singulating an OLED display motherboard into a single OLED display substrate is shown. Figure 3 As shown, a plurality of OLED display substrates are formed on the OLED display motherboard, and each OLED display substrate is as shown in the above reference Figure 1 and Figure 2 In the hybrid OLED display substrate described in the figure, the OLED display device is encapsulated between the glass substrate GLASS and the encapsulation protection layer TPF. Figure 3As shown, a plurality of OLED display substrates are arranged on a motherboard in an array of multiple rows and columns, and each OLED display substrate is roughly rectangular, having a display area AA, a packaging transition area BB surrounding the display area AA, and an edge area CC surrounding the packaging transition area BB. The four corners of the rectangular shape of each OLED display substrate can be right angles or rounded corners. The hybrid OLED display substrate of interest in the present invention includes a glass substrate, a light-emitting device layer including a plurality of OLED light-emitting devices disposed on the glass substrate, a cofferdam structure (i.e., a blocking dam structure) disposed around the plurality of OLED light-emitting devices, an internal packaging structure that encapsulates the plurality of OLED light-emitting devices and the blocking dam structure, a Crack Dam structure disposed in an inorganic layer on the glass substrate for preventing external cracks from being transmitted to the OLED light-emitting device, and a packaging protection layer TPF that encapsulates the internal packaging structure, the Crack Dam structure, and the edge area together. Different from the flexible OLED display substrate constructed of polyimide (PI) substrate and the rigid OLED display substrate encapsulated by inorganic glass plate as the top plate, this hybrid OLED display substrate is a product that is both rigid and flexible. The encapsulation is affected by its preparation process (including laser cutting, slimming, wheel cutting, CNC), which may lead to encapsulation failure. The glass substrate of the hybrid OLED display substrate can ensure the flatness of the product display area, and the encapsulation protection layer TPF makes the product thinner and lighter than the hard screen. In the production process of hybrid OLED products, in order to ensure the thinness of the product, after the large glass panel process is completed, a slimming process can also be included to thin the glass substrate, and then the thinned glass substrate can be cut to make a display substrate of the size of the final product.

[0056] Specifically, Figure 3 (a) and Figure 4 As shown in (a), the hybrid OLED display motherboard includes a plurality of OLED display substrates arranged in a multi-row and multi-column array, each OLED display substrate having a display area AA, a packaging transition area BB and an edge area CC, and the entire hybrid OLED display motherboard is covered by a packaging protection layer TPF. A laser cutting path LaCL for cutting the packaging protection layer TPF and a knife wheel cutting path WhCL for cutting the glass substrate GLASS are arranged between two adjacent OLED display substrates. Figure 2 As shown, in the hybrid OLED display substrate of the related art, the crack blocking dam structure Crack Dam is usually arranged at one end of the edge region CC of the display substrate away from the display region AA, that is, arranged at a side of the edge region close to the laser cutting line LaCL.

[0057] In order to cut out individual hybrid OLED display substrates from the motherboard, first Figure 5As described above, it is necessary to use a laser to cut the encapsulation protection layer TPF above the hybrid OLED display motherboard twice horizontally and vertically along the laser cutting line LaCL between adjacent hybrid OLED display substrates; then Figure 6 As shown, the portion of the encapsulation protection layer TPF between the cut adjacent hybrid OLED display substrates is torn off; finally, as shown in Figure 7 As shown, the glass substrate is cut along the cutter wheel cutting road WhCL using a cutting tool such as a glass knife to form a single OLED display substrate.

[0058] In the above-mentioned singulation process of the OLED display substrate, the horizontal and vertical laser scanning cutting causes the laser energy at the intersection of the horizontal and vertical scanning to accumulate, so that the crack dam structure Crack Dam very close to the intersection is carbonized, resulting in the following Figure 3 (b) and Figure 4 The carbonization point (which can be called the laser cross carbon point) shown in (b) destroys the structure of the alternating arrangement of inorganic and organic materials in the crack barrier dam structure Crack Dam, which can no longer prevent the crack from extending to the display area, affecting the packaging and posing a GDS risk. Figure 8 As shown in the figure, during laser cutting, the carbonization points generated by the superposition of laser energy during the horizontal and vertical scanning processes can lead to GDS risks.

[0059] Further references Figure 4 (b), as mentioned above, the hybrid OLED display substrate of the related art is usually formed in a rectangular shape, which can be a rounded rectangle or a right-angled rectangle. Figure 4 As shown, the crack blocking dam structure Crack Dam of the hybrid OLED display substrate in the related art is also formed in a rectangular shape, which includes a plurality of crack blocking channels surrounding the display area AA, and each crack blocking channel is filled with organic material, thereby forming a crack blocking dam structure Crack Dam in which inorganic materials and organic materials are alternately arranged.

[0060] As mentioned above, since the multiple crack blocking channels constituting the crack barrier dam structure Crack Dam are close to the laser cutting line LaCL, the accumulated energy of the laser transverse and longitudinal scanning during singulation may cause damage to the crack barrier dam structure Crack Dam, resulting in a GDS risk.

[0061] In order to solve the above problems existing in the related art, the present disclosure provides a hybrid OLED display substrate, such as Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13As shown, the hybrid OLED display substrate of the embodiment of the present disclosure is Figure 2 , Figure 3 and Figure 4 The difference between the hybrid OLED display substrate in the related technology shown is that the crack blocking dam structure Crack Dam included in the hybrid OLED display substrate of the embodiment of the present disclosure includes multiple crack blocking channels that are indented into the display area AA at the corners of the rectangle, so that the Laser cross carbon points as described above are outside the portion of the crack blocking dam structure Crack Dam at the corners, thereby avoiding the position where the laser energy is accumulated during the horizontal and vertical scanning of the laser during singulation. The laser energy during the laser scanning process during singulation will not destroy the crack blocking channels of the crack blocking dam structure Crack Dam, ensuring that the crack blocking dam structure will not be damaged during the singulation process, thereby ensuring the performance of the individual hybrid OLED display substrates after singulation.

[0062] Fig. 9 A schematic cross-sectional view of a corner portion of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown. Fig.10 A schematic plan view of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown, wherein Fig. 9 Can be regarded as Fig.10 Cross-sectional view along line BB'. Figure 1 and Fig. 9 , Fig.10 As shown, the hybrid OLED display substrate of the present invention comprises a light emitting device layer RGB arranged in a display area AA on a glass substrate GLASS, which comprises a plurality of pixels, each of which may comprise an OLED light emitting device and a pixel driving circuit thereof; a cofferdam DAM disposed in a package transition area BB and surrounding the display area AA, Fig. 9 The hybrid OLED display substrate of the disclosed embodiment shown includes two cofferdams DAM, but the present invention is not limited thereto, and the shape and number of the cofferdams can be set according to display requirements; an internal encapsulation structure (including a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer as described above) in the display area AA and the encapsulation transition area BB and covering multiple pixels and the cofferdam DAM; and an encapsulation protection layer TPF arranged in the display area AA, the encapsulation transition area BB, and the edge area CC and wrapping the internal encapsulation structure, that is, the encapsulation protection layer TPF covers the entire OLED display substrate, which is generally composed of an inorganic film and an organic film, for example, including a PET film material as described above, so that water and oxygen are difficult to penetrate into the interior of the OLED device. The OLED display substrate configured in this way can extend the life of the OLED device.

[0063] like Fig. 9 , Fig.10 , Fig.11 , Fig.12 and Fig.13As shown, in the hybrid OLED display substrate of the embodiment of the present invention, a crack blocking dam structure Crack Dam with a specific structure is formed in the inorganic layer (for example, including the barrier layer BARRIER and the buffer layer BUFFER) disposed on the glass substrate GLASS through an exposure, etching and development process. Similar to the rectangular shape of the display area AA, the crack blocking dam structure Crack Dam is formed into a substantially rectangular frame structure. The crack blocking dam structure Crack Dam of the hybrid OLED display substrate of the embodiment of the present disclosure includes a plurality of parallel grooves formed in the inorganic layer 2 and extending around the display area AA. The plurality of parallel grooves can be filled with organic materials to form a structure similar to Figure 2 The crack blocking channel in the related art shown in FIG. That is, the crack blocking dam structure of the hybrid OLED display substrate of the embodiment of the present disclosure also includes a plurality of crack blocking channels, that is, a blocking structure composed of an inorganic material and an organic material alternately arranged, which is used to block the external crack from extending along the inorganic layer into the display area AA.

[0064] As mentioned above, Figure 2 , Figure 3 and Figure 4 Unlike the hybrid OLED display substrate in the related art, the crack blocking dam structure Crack Dam included in the hybrid OLED display substrate of the embodiment of the present disclosure includes a plurality of crack blocking channels formed in the inorganic layer around the display area AA, and these crack blocking channels extend in parallel around the display area AA.

[0065] Specifically, in one embodiment, Fig.10 As shown, each crack blocking channel in the crack blocking dam structure Crack Dam extends around the display area AA. For example, the first crack blocking channel Ch1 closest to the display area AA includes a first side L1 and a second side L2 extending along a first direction X (e.g., a row direction), a third side L3 and a fourth side L4 extending along a second direction Y (e.g., a column direction), and the first side L1, the third side L3, the second side L2 and the fourth side L4 are sequentially connected together through a first corner C1, a second corner C2, a third corner C3 and a fourth corner C4 therebetween.

[0066] and Figure 3 and Figure 4 Unlike the crack blocking channel in the related art shown in the figure, the crack blocking channel Ch1 of the hybrid OLED display substrate of the embodiment of the present disclosure has a first side L1 and a second side L2 extending along the first direction X, a third direction L3 and a fourth direction L4 extending along the second direction Y, and the orthographic projections of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 on the glass substrate GLASS are all whole arcs, such as Fig.10As shown, each corner is a whole arc protruding toward the display area AA, so that the crack blocking dam structure formed at the corner of the display substrate can be concave toward the display area AA, thereby avoiding the Laser cross carbon point and being inside the Laser cross carbon point.

[0067] As described above, in order to solve the problem of carbonization of the crack barrier structure during the laser cutting process that may exist in the process of monolithic hybrid OLED display substrate in the prior art, Fig.10 The crack blocking channel in the crack blocking dam structure included in the hybrid OLED display substrate of the embodiment of the present disclosure is improved at the Laser cross carbon point during the singulation process, so that the portion of the crack blocking channel at the Laser cross carbon point is inside the Laser cross carbon point, that is, the intersection position of the horizontal and vertical laser cutting roads LaCL on the hybrid OLED display motherboard is outside the crack blocking channel in each hybrid OLED display substrate, thereby avoiding damage to the crack blocking channel due to heat accumulation during laser cutting.

[0068] like Fig.10 As shown, in one embodiment, the hybrid OLED display substrate includes a crack blocking dam structure arranged around the cofferdam structure, the crack blocking dam structure includes a plurality of crack blocking channels, and each crack blocking channel includes a first corner C1, a second corner C2, a third corner C3 and a fourth corner C4 which are a whole arc shape, and the arc shape protrudes toward the display area AA.

[0069] Further, if Fig. 9 As shown, each of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 can be retracted toward the display area AA to the inside of the package transition area BB, that is, the part of the crack blocking channel retracted to the inside of the package transition area BB is covered by the first inorganic encapsulation layer CVD1 and the second inorganic encapsulation layer CVD2, so that the laser cross carbon point as described above can be avoided more reliably. Fig.10 As shown, in addition to the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4, in order to ensure the effective area of ​​the display area AA, only the parts at these four corners of the crack blocking channel are indented, and the first side L1, the second side L2, the third side L3 and the fourth side L4 can still be set on the side of the edge area CC away from the display area AA.

[0070] like Fig. 9 and Fig.10As shown, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 have the same shape, are all arc-shaped, and are all retracted into the internal packaging structure, that is, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 are located in the packaging transition area BB at one end away from the display area AA. Fig. 9 In the illustrated embodiment, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 are indented into the packaging transition area BB, and are covered by the internal packaging structure, and are far away from the display area AA relative to the cofferdam DAM. Such a setting separates the orthographic projection of the crack blocking dam structure Crack Dam on the glass substrate GLASS from the orthographic projection of the cofferdam DAM on the glass substrate, and the orthographic projection of the crack blocking dam structure Crack Dam on the glass substrate GLASS is far away from the display area AA relative to the orthographic projection of the cofferdam DAM on the glass substrate GLASS, so as to ensure that the crack blocking dam structure Crack Dam and the cofferdam DAM can better play the role of blocking external cracks from being transmitted along the inorganic layer to the display area AA and preventing external water and oxygen from entering the display area AA. However, the present disclosure is not limited to this, and according to the material filled in the groove of the crack blocking dam structure, the orthographic projection of the crack blocking dam structure Crack Dam on the glass substrate GLASS can also overlap with the orthographic projection of the cofferdam DAM on the glass substrate GLASS.

[0071] exist Fig.10 In the illustrated embodiment, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 have the same shape, are all arc-shaped, and are all retracted into the package transition area BB. However, the present invention is not limited thereto. Fig.12In the illustrated embodiment, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of each crack blocking channel are all indented toward the display area AA, but the entire crack blocking channel is still arranged in the edge area CC. That is, although the corners of each crack blocking channel are indented toward the display area AA, the indentation amplitude is relatively small, for example, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the outermost crack blocking channel among the plurality of crack blocking channels are indented toward the display area AA by about 1 / 3 to 2 / 3 of the minimum distance between the edge area CC and the package transition area BB, that is, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 are indented toward the display area AA, so that the distance between the portion of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 closest to the laser cross carbon point and the laser cross carbon point is 1 / 3 to 2 / 3 of the minimum distance between the edge area CC and the package transition area BB. Through such a setting, on the one hand, it can be avoided that the energy accumulation during the horizontal and vertical laser scanning at the laser cross carbon point affects the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4, and destroys the crack blocking effect of the crack blocking dam structure Crack Dam; on the other hand, it can also be avoided that the transitional indentation of the crack blocking channel leads to a reduction in the effective luminous area of ​​the display area AA. In practice, the degree of indentation of each corner of each crack blocking channel in the crack blocking dam structure Crack Dam can be appropriately set according to the required performance requirements of the OLED display substrate, the thickness of the encapsulation protection layer TPF, and the power of the laser used for the singulation process on the production line.

[0072] exist Fig.10 and Fig.12 In the illustrated embodiment, the first corner portion C1 , the second corner portion C2 , the third corner portion C3 and the fourth corner portion C4 are configured to have substantially the same shape, that is, each corner portion is a whole arc.

[0073] In one embodiment, Fig.11As shown, the crack blocking dam structure Crack Dam of the hybrid OLED display substrate includes a plurality of crack blocking channels Ch1, Ch2, ... Chout arranged in sequence along the direction from the display area AA to the edge area CC, and the plurality of crack blocking channels extend in parallel along the periphery of the display area AA. The crack blocking channel closest to the display area AA in the crack blocking dam structure is the proximal crack blocking channel Chout; the crack blocking channel farthest from the display area AA in the crack blocking dam structure is the distal crack blocking channel Chout. The proximal crack blocking channel Ch1 is closest to the display area AA relative to other crack blocking channels, while the distal crack blocking channel Chout is farthest from the display area AA relative to other crack blocking channels. Therefore, relative to other crack blocking channels, the distal crack blocking channel Chout is closest to the edge area, that is, it is closest to the laser cutting channel when it is singulated from the hybrid OLED display motherboard, and is also most likely to be damaged by the laser energy used during singulation. Therefore, the layout position of the distal crack blocking channel Chout is critical, as long as the distal crack blocking channel Chout is set at a position that makes the distal crack blocking channel Chout not easily damaged by the laser energy during the laser cutting process. In this way, other crack blocking channels that are farther away from the laser cutting channel of the laser used during the singulation process relative to the distal crack blocking channel Chout are less likely to be damaged by the laser energy in a single laser scan or damaged by the superposition of laser energy caused by multiple laser scans.

[0074] For this reason, Fig.11 As shown, the outermost remote crack blocking channel Chout in the crack blocking dam structure Crack Dam of the hybrid OLED display substrate according to one embodiment of the present application includes a first side L1, a second side L2, a third side L3, a fourth side L4, a first corner C1 between the first side L1 and the third side L3, a second corner C2 between the third side L3 and the second side L2, a third corner C3 between the second side L2 and the fourth side L4, and a fourth corner C4 between the fourth side L4 and the first side L1. Fig.11 As shown, the first side L1 and the third side L3 extend along the first direction X and the second direction Y respectively and intersect at the first intersection P1, the third side L3 and the second side L2 extend along the second direction Y and the first direction X respectively and intersect at the second intersection P2, the second side L2 and the fourth side L4 extend in the first direction X and the second direction Y respectively and intersect at the third intersection P3, and the fourth side L4 and the first side L1 extend in the second direction Y and the first direction X respectively and intersect at the fourth intersection P4. Fig.11As shown in FIG. 1 , the first side L1, the first intersection point P1, the third side L3, the second intersection point P2, the second side L2, the third intersection point P3, the fourth side L4, and the fourth intersection point P4 are sequentially connected to form a quadrilateral, and the first corner C1, the second corner C2, the third corner C3, and the fourth corner C4 are all inside the quadrilateral. This is because the cutting channel along which the laser is cut in the laser cutting process during the process of singulating the hybrid OLED display motherboard into a hybrid OLED display substrate is usually set along the edge area, that is, usually along the edge area such as Fig.11 The first side L1, the second side L2, the third side L3 and the fourth side L4 are shown. For example, in one example, the laser cutting channel can be set at a distance from the first side L1, the second side L2, the third side L3 and the fourth side L4 relative to the display area AA (in this case, a laser with slightly higher energy can be used for cutting, because there is a distance between the laser cutting channel and the crack blocking channel, so a laser with higher energy can be used for cutting and it can be ensured that the distal crack blocking channel of the crack blocking dam structure will not be damaged, and the entire distal crack blocking channel is intact after the laser cutting process, so that the crack blocking dam structure Crack Dam plays a better role in preventing cracks from propagating to the display area AA). For example, in another example, the laser cutting channel based on the laser cutting used during the singulation process can be set along the first side L1, the second side L2, the third side L3 and the fourth side L4 of the distal crack blocking channel Chout. In this case, the energy of the cutting laser can be set to be relatively small, so that it can meet the laser cutting requirements and will not damage the distal crack blocking channel set in the inorganic layer during one cutting. In addition, when laser cutting the hybrid OLED display motherboard, it is necessary to perform secondary laser cutting in the horizontal and vertical directions. Therefore, the intersection of the laser cutting channels during the secondary cutting will be affected by the accumulated laser energy of the secondary laser cutting. Therefore, the crack blocking channel at the intersection and its surroundings is more susceptible to damage. Fig.11 In the embodiment, the intersection of the transverse and longitudinal laser cuts is closer to Fig.11 The first intersection point P1, the second intersection point P2, the third intersection point P3 and the fourth intersection point P4 are shown, therefore, in the embodiment of the present disclosure, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 are all arranged in the quadrilateral, so as to be away from the first intersection point P1, the second intersection point P2, the third intersection point P3 and the fourth intersection point P4 respectively, so as to avoid damage by the secondary laser scanning, thereby ensuring that the distal crack blocking channel is intact.

[0075] In order to ensure that the far-end crack blocking channel Chout is not damaged during the singulation laser cutting process, in one embodiment of the present application, the following settings can be made: the closest distance m3 between the first corner C1 and the first intersection P1 is set to be at least 1 / 3 of the closest distance m0 between the first intersection P1 and the AA display area; similarly, the closest distance between the second corner C2 and the second intersection P2 is at least 1 / 3 of the closest distance between the second intersection P2 and the display area AA; the closest distance between the third corner C3 and the third intersection P3 is at least 1 / 3 of the closest distance between the third intersection P3 and the display area AA; the closest distance between the fourth corner C4 and the fourth intersection P4 is at least 1 / 3 of the closest distance between the fourth intersection P4 and the display area AA.

[0076] like Fig.11 As shown, in order to further ensure that the distal crack blocking channel Chout is not damaged during the singulation laser cutting process, and to make the distal crack blocking channel Chout have a consistent overall impact on the overall display effect of the display area of ​​the display substrate, so that the entire display panel achieves uniform display, the following settings can be made: the distance m2 between the first end point of the first side L1 close to the first intersection P1 and the first intersection P1 is equal to the distance m1 between the first end point of the third side L3 close to the first intersection P1 and the first intersection P1; similarly, the distance between the second end point of the third side L3 close to the second intersection P2 and the second intersection P2 is equal to the distance between the first end point of the second side L2 close to the second intersection P2 and the second intersection P2; the distance between the second end point of the second side L2 close to the third intersection P3 and the third intersection P3 is equal to the distance between the second end of the fourth side L4 close to the third intersection P3 and the third intersection P3; the distance between the first end point of the fourth side L4 close to the fourth intersection P4 and the fourth intersection P4 is equal to the distance between the second end point of the first side L1 close to the fourth intersection P4 and the fourth intersection P4. That is, the shortest distance between the first intersection point P1 and the first side L1 is equal to the shortest distance between the first intersection point P1 and the third side L3; the shortest distance between the second intersection point P2 and the third side L3 is equal to the shortest distance between the second intersection point P2 and the second side L2; the shortest distance between the third intersection point P3 and the second side L2 is equal to the shortest distance between the third intersection point P3 and the fourth side L4; the shortest distance between the fourth intersection point P4 and the fourth side L3 is equal to the shortest distance between the fourth intersection point P4 and the first side L1. This arrangement ensures that the corners of the entire crack barrier dam structure Crack Dam have a consistent effect on the display effect of the entire display substrate, ensuring display quality.

[0077] In one embodiment, in order to further ensure that the far-end crack blocking channel will not be damaged by the superposition of laser energy caused by the secondary horizontal and vertical laser scanning during the singulation laser cutting process, the degree of indentation of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 into the display area AA can be further increased. In one example, the following settings can be made: the closest distance m3 between the first corner C1 and the first intersection P1 is greater than or equal to the distance m2 between the first endpoint of the first side L1 close to the first intersection P1 and the first intersection P1 (i.e., greater than or equal to the closest distance between the first side L1 and the first intersection P1); the closest distance between the second corner C2 and the second intersection P2 is greater than or equal to the distance between the second endpoint of the third side L3 close to the second intersection P2 and the second intersection P2 (i.e., greater than or equal to the closest distance between the third side L3 and the second intersection P2); the closest distance between the third corner C3 and the third intersection P3 is greater than or equal to the distance between the second endpoint of the second side L2 close to the third intersection P3 and the third intersection P3 (i.e., greater than or equal to the closest distance between the second side L2 and the third intersection P3); the closest distance between the fourth corner C4 and the fourth intersection P4 is greater than or equal to the distance between the first endpoint of the fourth side L4 close to the fourth intersection P4 and the fourth intersection P4 (i.e., greater than or equal to the closest distance between the fourth side L4 and the fourth intersection P4). This arrangement can further ensure that the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the distal crack blocking channel are sufficiently retracted toward the display area CC, further reducing the possibility of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 being damaged by laser.

[0078] In one embodiment, the quadrilateral formed by extending the first side L1, the second side L2, the third side L3 and the fourth side L4 is a rectangle, that is, the first side L1 and the second side L2 are perpendicular to the third side L3 and the fourth side L4. At this time, the following settings can be made: the point on the first corner C1 that is closest to the first intersection point P1 is at the midpoint of the hypotenuse of the right triangle formed by the first endpoint of the first side L1, the first intersection point P1 and the first endpoint of the third side L3; the point on the second corner C2 that is closest to the second intersection point P2 is at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the third side L3, the second intersection point P2 and the first endpoint of the second side L2; the point on the third corner C3 that is closest to the third intersection point P3 is at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the second side L2, the third intersection point P3 and the second endpoint of the fourth side L4; the point on the fourth corner C4 that is closest to the fourth intersection point P4 is at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the first side L1, the fourth intersection point P4 and the first endpoint of the fourth side L4.

[0079] In one embodiment, in order to further avoid the damage caused by the superposition of laser energy during the horizontal and vertical laser cutting of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the distal crack blocking channel during singulation, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 may be further retracted toward the display area AA. In one example, the point on the first corner C1 closest to the first intersection P1 may be set on the side of the package transition area BB away from the display area AA; the point on the second corner C2 closest to the second intersection P2 may be set on the side of the package transition area BB away from the display area AA; the point on the third corner C3 closest to the third intersection P3 may be set on the side of the package transition area BB away from the display area AA; and the point on the fourth corner C4 closest to the fourth intersection P4 may be set on the side of the package transition area BB away from the display area AA.

[0080] Further, in one embodiment, the hybrid OLED display substrate includes a plurality of crack blocking channels, the plurality of crack blocking channels include a distal crack blocking channel Chout and at least one proximal crack blocking channel close to the display area AA relative to the distal crack blocking channel Chout; the plurality of crack blocking channels Ch1, Ch2, ... Chout extend in parallel around the display area AA, and the distance between each two adjacent crack blocking channels is the same; the orthographic projection of the point closest to the first intersection P1 on the first corner of each of the plurality of crack blocking channels on the glass substrate is within the packaging transition area BB and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area AA; each crack of the plurality of crack blocking channels The orthographic projection of the point on the second corner of the blocking channel that is closest to the second intersection point P2 is located in the packaging transition area BB and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area AA; the orthographic projection of the point on the third corner C3 of each crack blocking channel of the multiple crack blocking channels that is closest to the third intersection point P3 is located in the packaging transition area BB and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area AA; and the orthographic projection of the point on the fourth corner C4 of each crack blocking channel of the multiple crack blocking channels that is closest to the fourth intersection point P4 is located in the packaging transition area BB and on the side of the orthographic projection of the cofferdam structure on the glass substrate away from the display area AA. That is, this arrangement makes it possible for the point on each corner of each crack blocking channel in the multiple crack blocking channels that is closest to the corresponding intersection of the first intersection point, the second intersection point, the third intersection point and the fourth intersection point to be arranged in the packaging transition area, but arranged on the side of the cofferdam structure away from the display area AA, that is, the first corner, the second corner, the third corner and the fourth corner are indented, but in order to further play the edge crack blocking role of the first side, the second side, the third side and the fourth side connected to each corner, the first corner, the second corner, the third corner and the fourth corner are appropriately indented in the present invention to avoid damage due to the laser cutting process, while ensuring that the role of preventing cracks at the edge from being transmitted to the display area AA is played.

[0081] However, the present invention is not limited thereto. Fig.12 In the embodiment shown, the four corners of each crack blocking channel included in the crack blocking dam structure Crack Dam included in the hybrid OLED display substrate have the same shape except that: Fig.13In the embodiment shown, the shapes of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 included in each crack blocking channel of the crack blocking dam structure Crack Dam included in the hybrid OLED display substrate are not completely the same, wherein the first corner C1 is a straight line structure connected between the first side L1 and the third side L3, the fourth corner C4 is a straight line structure connected between the first side L1 and the fourth side L4, the second corner C2 is a whole arc structure connected between the third side L3 and the second side L2, and the third corner C3 is a whole arc structure connected between the second side L2 and the fourth side L4. That is, the first corner C1 and the fourth corner C4 are straight line structures approaching the display area AA; while the second corner C2 and the third corner C3 are whole arc structures protruding in the direction of the display area AA.

[0082] for Fig.13 The structure shown in FIG. 1 includes a first corner portion C1, a second corner portion C2, a third corner portion C3 and a fourth corner portion C4, and a crack dam structure Crack Dam is arranged in the edge region CC. However, the present disclosure is not limited thereto. For example, Fig.10 In the embodiment shown, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of different shapes are indented into the package transition area BB, that is, the four corners of the crack barrier dam structure Crack Dam are all set in the package transition area BB, and the four sides are still in the edge area CC, so as to better ensure that the laser cross carbon points caused by the laser cutting process of the package protection layer TPF can be effectively located outside the crack barrier dam structure Crack Dam, and the distance is relatively far, so as to avoid limiting the power of the laser used for cutting, that is, the power of the laser used for the cutting process can be limited; as mentioned above, except for the four corners, the other parts of the crack blocking channel of the crack barrier dam structure are still in the edge area CC, so this indentation has a relatively small effect on the effective area of ​​the display area. According to the display parameters required by the OLED display substrate, the shape and indentation degree of the crack blocking channel in the crack barrier dam structure can be appropriately selected.

[0083] for Fig.13In the embodiment shown, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the outermost crack blocking channel among the multiple crack blocking channels can be recessed toward the display area AA by about 1 / 3 to 2 / 3 of the minimum distance between the edge area CC and the package transition area BB, that is, the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 are retracted toward the display area AA, so that the distance from the portion of the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 closest to the laser cross carbon point to the laser cross carbon point is 1 / 3 to 2 / 3 of the minimum distance between the edge area CC and the package transition area BB. Such a setting, on the one hand, can prevent the energy accumulation during the horizontal and vertical laser scanning at the laser cross carbon point from affecting the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4, thereby destroying the crack blocking effect of the crack blocking dam structure Crack Dam; on the other hand, it can also prevent the transition retraction from causing a reduction in the effective light emitting area of ​​the display area AA. In practice, the degree of indentation of each corner of each crack blocking channel in the crack blocking dam structure CrackDam can be appropriately set according to the performance requirements of the desired OLED display substrate, the thickness of the encapsulation protection layer TPF, and the power of the laser used for the singulation process on the production line.

[0084] As described above, the hybrid OLED display substrate of the embodiment of the present disclosure includes a display area AA, an encapsulation transition area BB arranged around the display area AA, and an edge area CC around the encapsulation transition area BB. In the related art, the crack blocking dam structure used to prevent the external cracks from being transmitted to the display area AA through the inorganic layer on the glass substrate is usually arranged on the side of the edge area CC away from the display area AA. In order to avoid the crack blocking channel near the laser transverse and longitudinal intersection point in the crack blocking dam structure caused by the superposition of laser energy during the transverse and longitudinal laser cutting in the process of singulation of the hybrid OLED display substrate being carbonized, in the hybrid OLED display substrate of the embodiment of the present disclosure, the corner of each crack blocking channel near the laser transverse and longitudinal intersection point of the laser in the multiple crack blocking channels included in the crack blocking dam structure is arranged to be away from the laser transverse and longitudinal intersection point and indented toward the display area AA, so that the energy accumulation during the laser transverse and longitudinal scanning process in the laser cutting process used in the singulation process will not cause the crack blocking dam structure to be partially carbonized at the corner. In one embodiment, except for the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4, the first side L1, the second side L2, the third side L3 and the fourth side L4 included in the crack blocking channel are still arranged on the side away from the display area AA in the edge area CC as in the related art. The four sides arranged in this way may still be relatively close to the horizontal or vertical laser cutting road LaCL, but these positions usually only undergo one laser scan, so they may not be damaged by the accumulation of laser energy in two laser scans as at the horizontal and vertical intersection of the Laser. Such an arrangement can appropriately increase the effective light-emitting area of ​​the display area AA. However, the present invention is not limited to this, and the positions of the first side L1, the second side L2, the third side L3 and the fourth side L4 of the crack blocking channel can be appropriately adjusted according to the required effective light-emitting area of ​​the display area AA. For example, the first side L1, the second side L2, the third side L3 and the fourth side L4 of the crack blocking channel can be arranged on the side of the edge region CC close to the display region AA to be as far away from the laser cutting lane LaCL as possible, so that a laser with a relatively high power can be used to perform the laser cutting process in the singulation process. Fig. 9 As shown, the entire crack barrier dam structure Crack Dam is arranged on a side of the packaging transition area BB away from the display area AA. In this way, the orthographic projection of the entire crack barrier dam structure Crack Dam on the glass substrate Glass will be within the orthographic projection range of the internal packaging structure on the glass substrate Glass. This can further ensure that the crack barrier dam structure Crack Dam will not be affected by the laser during the singulation process, thereby ensuring the protection capability of the crack barrier dam structure Crack Dam to the edge area.

[0085] Fig.14A schematic diagram of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown. In this embodiment, the crack blocking dam structure Crack Dam includes three crack blocking channels, and the three crack blocking channels are indented toward the display area AA at the corners. Fig.14 The hybrid OLED display substrate shown is similar to Fig.10 The display substrate shown is generally in a rectangular structure. Fig.14 FIG. 4 is a schematic diagram of only the fourth corner C4 of each of the three crack blocking channels between the first side L1 and the fourth side L4. Fig.14 As shown, the three crack blocking channels included in the crack blocking dam structure Crack Dam extend in parallel around the display area AA. In one embodiment, the distance between each two adjacent crack blocking channels can always be the same, but the present invention is not limited to this, and the distance between each crack blocking channel can also be set according to the actual application needs. The first corner C1, the second corner C2 and the third corner C3 included in the three crack blocking channels can be the same structure as the fourth corner C4, or they can be different structures, for example, they can be indented structures of their shapes, as long as it can ensure that the corners of the entire crack blocking channel are away from the laser cross carbon point and closer to the display area AA to avoid being damaged by the accumulated laser energy during the horizontal and vertical laser scanning at the laser cross carbon point during the laser cutting process, thereby not having the crack blocking function. In this embodiment, the fourth corner C4 of each crack blocking channel is a whole arc structure, that is, the fourth corner C4 of the crack blocking channel between the first side L1 and the fourth side L4 is an entire arc, protruding toward the display area AA. As shown Fig.14 As shown, the length of the shortest line segment between the laser cross carbon point and the display area AA is the shortest distance D0, and the distance between the intersection between the shortest line segment and the corresponding corner of each crack blocking channel of the crack blocking dam structure Crack Dam and its closest laser cross carbon point is D1. That is, the Crack Dam structure of the embodiment of the present disclosure can be regarded as retracting each corner of each crack blocking channel in the crack blocking dam structure Crack Dam at the laser cross carbon point in the related art toward the display area AA. In this embodiment, it can be regarded as a distance retracted toward the display area AA of D1. As described above, in order to ensure that the laser energy accumulation caused by the horizontal and vertical scanning of the laser during the singulation process will not damage the crack blocking dam structure Crack Dam, the retraction distance can be set to: D1=a*D0, where a ranges from 1 / 3 to 2 / 3.

[0086] As described above, in order to ensure the effective display area of ​​the display area AA, in the crack blocking dam structure Crack Dam in the hybrid OLED display substrate in the embodiment of the present disclosure, only the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the crack blocking channel at the corner of the crack blocking dam structure Crack Dam are retracted toward the display area AA, and the first side L1, the second side L2, the third side L3 and the fourth side L4 of the crack blocking channel are similar to the structure in the related art, and can be set on the side away from the display area AA in the edge area CC, that is, they can be set at the edge of the edge area CC, relatively close to the laser cutting line LaCL of the laser cutting, because the first side L1, the second side L2, the third side L3 and the fourth side L4 usually only undergo one laser scanning during the singulation process, and will not undergo the destructive effect of the accumulated laser energy during two laser scanning processes like the Laser cross carbon point.

[0087] Further, in the embodiment of the present disclosure, in the design of indenting the portion of the crack dam structure at the corner toward the display area AA, in order to ensure that the crack dam structure does not affect the display area AA, Fig.14 As shown, the entire arc structure at the corner can be designed as follows: the minimum distance h between the crack blocking channel closest to the display area AA in the crack blocking dam structure Crack Dam and the display area AA is greater than or equal to the second distance from the first side L1 to the display area AA and the third distance from the fourth side L4 to the display area AA, that is, the minimum distance h is greater than or equal to the second distance or the third distance. Fig.14 In the illustrated embodiment, the second distance is equal to the third distance, both being H. Fig.14 Although other corners and other sides are not shown in the illustrated embodiment, in order to ensure an overall uniform display effect, similar to the fourth corner C4, the crack blocking channels at the first corner C1, the second corner C2 and the third corner C3 can be arranged in the same manner. That is, the distances between the first side L1, the second side L2, the third side L3 and the fourth side L3 and the display area AA are all H, and the minimum distances h between the crack blocking channels closest to the display area AA at the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 and the display area AA are the same, and are all greater than or equal to H.

[0088] Furthermore, in order to ensure a more consistent display effect of the hybrid OLED display substrate, the minimum distance h between the crack blocking channel closest to the display area AA in the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 and the display area AA can be made equal to H, that is, the distance from each edge to the display area AA is equal. Fig.14 The distance H shown can range from 50µm to 70µm, for example, 60µm can be selected.

[0089] Fig.15 A schematic diagram of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown. In this embodiment, the crack blocking dam structure Crack Dam includes three crack blocking channels, and the three crack blocking channels are indented toward the display area AA at the corners. Fig.15 The hybrid OLED display substrate shown is similar to Fig.10 The display substrate shown is generally in a rectangular structure. Fig.15 FIG. 4 is a schematic diagram of only the fourth corner C4 of each of the three crack blocking channels between the first side L1 and the fourth side L4. Fig.15 As shown, the three crack blocking channels included in the crack blocking dam structure Crack Dam extend in parallel around the display area AA, and the distance between each two adjacent crack blocking channels can always be the same, but the present invention is not limited to this, and the distance between each crack blocking channel can also be set according to the actual application needs. The first corner C1, the second corner C2 and the third corner C3 included in the three crack blocking channels can have the same structure as the fourth corner C4, or can have different structures, for example, can be an indented structure of their shapes, as long as it can ensure that the corners of the entire crack blocking channel are away from the laser cross carbon point and closer to the display area AA to avoid damage caused by the accumulated laser energy during the horizontal and vertical laser scanning at the laser cross carbon point during the laser cutting process, thereby not having the crack blocking function. In this embodiment, the shape of the fourth corner C4 of each crack blocking channel is a broken line, and the broken line structure of the fourth corner C4 protrudes toward the display area AA as a whole. As shown Fig.15 As shown, the shortest distance between the laser cross carbon point and the edge of the display area AA is D0, and the distance between the center of the crack blocking dam structure Crack Dam (for example, a crack blocking channel in the middle of the three crack blocking channels) and the laser cross carbon point is D1. That is, the Crack Dam structure of the embodiment of the present disclosure can be regarded as the corner of the crack blocking dam structure Crack Dam with the center at the laser cross carbon point in the related art being retracted toward the display area AA. In this embodiment, it can be regarded as the distance retracted toward the display area AA being D1. As described above, in order to ensure that the laser energy accumulation caused by the laser transverse and longitudinal scanning during the singulation process will not damage the crack blocking dam structure Crack Dam, the retraction distance can be set to: D1=a*D0, where a ranges from 1 / 3 to 2 / 3.

[0090] As described above, in order to ensure the effective display area of ​​the display area AA, in the crack blocking dam structure Crack Dam in the hybrid OLED display substrate in the embodiment of the present disclosure, only the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the crack blocking channel at the corner of the crack blocking dam structure Crack Dam are retracted toward the display area AA, and the first side L1, the second side L2, the third side L3 and the fourth side L4 of the crack blocking channel are similar to the structure in the related art, and can be set on the side away from the display area AA in the edge area CC, that is, they can be set at the edge of the edge area CC, relatively close to the laser cutting line LaCL of the laser cutting, because the first side L1, the second side L2, the third side L3 and the fourth side L4 usually only undergo one laser scanning during the singulation process, and will not undergo the destructive effect of the accumulated laser energy during two laser scanning processes like the Laser cross carbon point.

[0091] Further, in the embodiment of the present disclosure, in the design of indenting the portion of the crack dam structure at the corner toward the display area AA, in order to ensure that the crack dam structure does not affect the display area AA, Fig.15 As shown, the entire arc structure at the corner can be designed as follows: the minimum distance h between the crack blocking channel closest to the display area AA in the crack blocking dam structure Crack Dam and the display area AA is greater than or equal to the second distance from the first side L1 to the display area AA and the third distance from the fourth side L4 to the display area AA, that is, the minimum distance h is greater than or equal to the second distance or the third distance. Fig.15 In the illustrated embodiment, the second distance is equal to the third distance, both being H. Fig.15 Although other corners and other sides are not shown in the illustrated embodiment, in order to ensure an overall uniform display effect, similar to the fourth corner C4, the crack blocking channels at the first corner C1, the second corner C2 and the third corner C3 can be arranged in the same manner. That is, the distances between the first side L1, the second side L2, the third side L3 and the fourth side L4 and the display area AA are all H, and the minimum distances h between the crack blocking channels closest to the display area AA at the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 and the display area AA are the same, and are all greater than or equal to H.

[0092] Furthermore, in order to ensure a more consistent display effect of the hybrid OLED display substrate, the minimum distance h between the crack blocking channel closest to the display area AA in the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 and the display area AA can be made equal to H, that is, the distance from each edge to the display area AA is equal. Fig.11 The distance H shown can range from 50µm to 70µm, for example, 60µm can be selected.

[0093] and Fig.14 In the embodiment shown, the fourth corner C4 of each crack blocking channel of the crack blocking dam structure CrackDam included in the hybrid OLED display substrate is in a whole arc shape. Fig.15 The orthographic projection of the fourth corner C4 of each crack blocking channel of the crack blocking dam structure Crack Dam included in the hybrid OLED display substrate in the illustrated embodiment on the glass substrate Glass is in the shape of a broken line, that is, the fourth corner C4 includes a zigzag line composed of multiple line segments connected end to end in sequence. Fig.15 In the illustrated embodiment, in the orthographic projection on the glass substrate Glass, the fourth corner C4 includes a first line segment S11, a second line segment S12, a third line segment S21, a fourth line segment S22, a fifth line segment S31, and a sixth line segment S32, wherein a first end of the first line segment S11 is connected to the first side L1, a second end is connected to a first end of the second line segment S12, a second end of the second line segment S12 is connected to a first end of the third line segment S21, a second end of the third line segment S21 is connected to a first end of the fourth line segment S22, a second end of the fourth line segment S22 is connected to a first end of the fifth line segment S31, and a second end of the fifth line segment S31 is connected to a first side L1. Connected to the first end of the sixth line segment S32, the second end of the sixth line segment S32 is connected to the fourth side L4; a first angle θ1 is formed between the first line segment S11 and the first side L1, a second angle θ2 is formed between the first line segment S11 and the second line segment S12, a third angle θ3 is formed between the second line segment S12 and the third line segment S21, a fourth angle θ4 is formed between the third line segment S21 and the fourth line segment S22, a fifth angle θ5 is formed between the fourth line segment S22 and the fifth line segment S31, a sixth angle θ6 is formed between the fifth line segment S31 and the sixth line segment S32, and a seventh angle θ7 is formed between the sixth line segment S32 and the fourth side L4.

[0094] In the embodiment of the present disclosure, the angle between each two adjacent line segments in the broken line can be set according to the degree to which each corner of the crack blocking channel needs to be retracted toward the display area AA. Fig.15In the case where the fourth corner C4 of the crack blocking channel shown includes six line segments, when the second angle θ2, the third angle θ3, the fourth angle θ4, the fifth angle θ5 and the sixth angle θ6 are all obtuse angles, the bending degree of the bending line of the fourth corner C4 is small, each crack blocking channel of the fourth corner C4 is relatively straight, and the minimum distance between the crack blocking channel closest to the display area AA in the fourth corner C4 and the display area AA is large; when the second angle θ2, the third angle θ3, the fourth angle θ4, the fifth angle θ5 and the sixth angle θ6 are all acute angles, the bending degree of the bending line of the fourth corner C4 is large, each crack blocking channel of the fourth corner C4 is relatively steep, and the crack blocking channel closest to the display area AA in the fourth corner C4 is relatively steep. The minimum distance between the crack blocking channel near the display area AA and the display area AA is small, but the process for preparing this structure is relatively complicated; when the second angle θ2, the third angle θ3, the fourth angle θ4, the fifth angle θ5 and the sixth angle θ6 are all right angles, the fourth corner C4 is formed into a right-angle step-like structure. At this time, the fourth corner C4 includes three steps, a first step S1, a second step S2, and a third step S3. The first step S1 includes a first line segment S11 and a second line segment S12 forming a right angle, the second step S2 includes a third line segment S21 and a fourth line segment S22 forming a right angle, and the third step S3 includes a fifth line segment S31 and a sixth line segment S32 forming a right angle.

[0095] exist Fig.15 In the illustrated embodiment, the first angle θ1 between the first line segment S11 and the first side L1 and the seventh angle θ7 between the sixth line segment S32 and the fourth side L4 can be set as needed. For example, like the second angle θ2 to the sixth angle θ6, they can be set to acute angles when the second angle θ2 to the sixth angle θ6 are acute angles, and can be set to obtuse angles when the second angle θ2 to the sixth angle θ6 are obtuse angles; or regardless of whether the second angle θ2 to the sixth angle θ6 are acute angles or obtuse angles, the first angle θ1 and the seventh angle θ7 can be set to right angles, which depends on the required display parameters or process parameters of the single-chip process, etc.

[0096] Fig.16 A schematic diagram of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown. In this embodiment, the crack blocking dam structure Crack Dam includes three crack blocking channels, and the three crack blocking channels are indented toward the display area AA at the corners. Fig.16 The hybrid OLED display substrate shown is similar to Fig.10 The display substrate shown is generally in a rectangular structure. Fig.16 FIG. 4 is a schematic diagram of only the fourth corner C4 of each of the three crack blocking channels between the first side L1 and the fourth side L4. Fig.16As shown, the three crack blocking channels included in the crack blocking dam structure Crack Dam extend in parallel around the display area AA, and the distance between each two adjacent crack blocking channels can always be the same, but the present invention is not limited to this, and the distance between each crack blocking channel can also be set according to the actual application needs. The first corner C1, the second corner C2 and the third corner C3 included in each of the three crack blocking channels can have the same structure as the fourth corner C4, or can have different structures, for example, can be an indented structure of its shape, as long as it can ensure that all corners of the entire crack blocking channel are away from the laser cross carbon point and closer to the display area AA to avoid being damaged by the accumulated laser energy during the horizontal and vertical laser scanning at the laser cross carbon point during the laser cutting process, thereby not having the crack blocking function. In this embodiment, the orthographic projection of the fourth corner C4 of each crack blocking channel on the glass substrate Glass includes multiple arcs, and the structure of the fourth corner C4 protrudes toward the display area AA as a whole. As shown Fig.16 As shown, the length of the shortest line segment between the laser cross carbon point and the edge of the display area AA is the shortest distance D0, and the distance between the center of the crack blocking dam structure Crack Dam (for example, a crack blocking channel in the middle of the three crack blocking channels) and the laser cross carbon point is D1. The Crack Dam structure of the embodiment of the present disclosure can be regarded as the corner of the crack blocking dam structure Crack Dam with the center at the laser cross carbon point in the related art being retracted toward the display area AA so that the corner is away from the laser cross carbon point, for example Fig.16 As shown, the distance D1 can be regarded as being indented toward the display area AA. As mentioned above, in order to ensure that the laser energy accumulation caused by the laser transverse and longitudinal scanning during the singulation process does not damage the crack dam structure Crack Dam, the indentation distance can be set to: D1=a*D0, where a ranges from 1 / 3 to 2 / 3.

[0097] As described above, in order to ensure the effective display area of ​​the display area AA, in the crack blocking dam structure Crack Dam in the hybrid OLED display substrate in the embodiment of the present disclosure, only the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 of the crack blocking channel at the corner of the crack blocking dam structure Crack Dam are retracted toward the display area AA, and the first side L1, the second side L2, the third side L3 and the fourth side L4 of the crack blocking channel are similar to the structure in the related art, and can be set on the side of the edge area CC away from the display area AA, that is, they can be set at the outer edge of the edge area CC away from the display area AA, relatively close to the laser cutting line LaCL of the laser cutting, because the first side L1, the second side L2, the third side L3 and the fourth side L4 will only undergo one laser scanning during the singulation process, and will not undergo two laser scannings in the horizontal and vertical directions like the laser cross carbon point.

[0098] Further, in the embodiment of the present disclosure, in the design of indenting the portion of the crack dam structure at the corner toward the display area AA, in order to ensure that the crack dam structure does not affect the display area AA, Fig.16 As shown, the entire arc structure at the corner can be designed as follows: the minimum distance h between the crack blocking channel closest to the display area AA in the crack blocking dam structure Crack Dam and the display area AA is greater than or equal to the second distance from the first side L1 to the display area AA and the third distance from the fourth side L4 to the display area AA, that is, the minimum distance h is greater than or equal to the second distance or the third distance. Fig.16 In the embodiment shown, the second distance and the third distance may be equal to each other, both being H. Fig.16 In the embodiment shown, h≥H. Fig.16 Although other corners and other sides are not shown in the illustrated embodiment, in order to ensure an overall uniform display effect, similar to the fourth corner C4, the crack blocking channels at the first corner C1, the second corner C2 and the third corner C3 can be arranged in the same manner. That is, the distances between the first side L1, the second side L2, the third side L3 and the fourth side L3 and the display area AA are all H, and the minimum distances h between the crack blocking channels closest to the display area AA at the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 and the display area AA are the same, and are all greater than or equal to H.

[0099] Furthermore, in order to ensure a more consistent display effect of the hybrid OLED display substrate, the minimum distance h between the crack blocking channel closest to the display area AA in the first corner C1, the second corner C2, the third corner C3 and the fourth corner C4 and the display area AA can be made equal to H, that is, the distance from each edge to the display area AA is equal. Fig.11The distance H shown can range from 50µm to 70µm, for example, 60µm can be selected.

[0100] and Fig.14 The fourth corner C4 of each crack blocking channel of the crack blocking dam structure CrackDam included in the hybrid OLED display substrate in the illustrated embodiment is arc-shaped as a whole. Fig.16 In the embodiment shown, the fourth corner C4 of each crack blocking channel of the crack blocking dam structure Crack Dam included in the hybrid OLED display substrate has a multi-segment arc-shaped structure as its orthographic projection on the glass substrate Glass. Fig.16 In the illustrated embodiment, the fourth corner C4 includes multiple arcs connected end to end. Specifically, in the orthographic projection on the glass substrate Glass, the fourth corner C4 includes a first arc CV1, a second arc CV2, a third arc CV3, and a fourth arc CV4. The first end of the first arc CV1 is connected to the first side L1, the second end is connected to the first end of the second arc CV2, the second end of the second arc CV2 is connected to the first end of the third arc CV3, the second end of the third arc CV3 is connected to the first end of the fourth arc CV4, and the second end of the fourth arc CV4 is connected to the fourth side L4. Fig.16 In the illustrated embodiment, the curvature radii of the first arc CV1, the second arc CV2, the third arc CV3 and the fourth arc CV4 can be set according to display requirements. For example, the curvature radii of the first arc CV1, the second arc CV2, the third arc CV3 and the fourth arc CV4 can be set to be the same, so that the overall display effect of the display substrate is consistent. Fig.16 In the illustrated implementation, four arcs are arranged between the first side L1 and the fourth side L4 to construct the fourth corner C4, so that the first arc CV1, the second arc CV2, the third arc CV3 and the fourth arc CV4 all protrude toward the display area AA, so that the entire fourth corner C4 is retracted toward the display area AA, thereby forming a crack blocking channel for preventing cracks from propagating along the glass substrate Glass away from the Laser cross carbon point, thereby avoiding destructive effects caused by energy accumulation during laser scanning at the Laser cross carbon point.

[0101] In the embodiment of the present disclosure, the number of arcs and the radius of curvature of each arc may be set according to the extent to which each corner of the crack blocking channel needs to be retracted toward the display area AA.

[0102] Fig.17 A schematic diagram of a hybrid OLED display substrate according to an embodiment of the present disclosure is shown. Fig.16The embodiment shown is different only in that the orthographic projection of the fourth corner C4 of each crack blocking channel on the glass substrate Glass includes multiple arcs and multiple line segments, and the structure of the fourth corner C4 as a whole protrudes toward the display area AA. Fig.17 The fourth corner C4 of each crack blocking channel in the crack blocking structure Laser Dam included in the hybrid OLED display substrate of the embodiment shown includes a first line segment ST1, a second arc CV2, a third arc CV3 and a fourth line segment ST4, wherein the first end of the first line segment ST1 is connected to the first side L1, the second end of the first line segment ST1 is connected to the first end of the second arc CV2, the second end of the second arc CV2 is connected to the first end of the third arc CV3, the second end of the third arc CV3 is connected to the first end of the fourth line segment ST4, and the second end of the fourth line segment ST4 is connected to the fourth side L4. The second arc CV2 and the third arc CV3 are connected and are located between the first line segment ST1 and the fourth line segment ST4. The curvature radii of the second arc CV2 and the third arc CV3 can be the same or different, as long as the constructed crack blocking channel as a whole avoids a certain distance from the laser cross carbon point to avoid the laser energy accumulation and carbonization during the laser longitudinal and transverse process during the singulation process. The first line segment ST1 forms a first angle θ1 with the first side L1, and the fourth line segment ST4 forms a seventh angle θ7 with the fourth side L4. The first angle θ1 and the seventh angle θ7 can be selected according to the required degree of corner indentation. Fig.17 In the embodiment shown, the first angle θ1 and the fourth angle θ4 are approximately 90 degrees. At this time, the length of the first line segment ST1 can be set to be equal to the length of the fourth line segment ST4, and the arc length and curvature radius of the second arc CV2 and the third arc CV3 can be set to be the same, so that the structure of the fourth corner C4 is a symmetrical structure relative to the laser cross carbon point, so that the crack blocking channel has roughly the same effect on the pixels in the display area AA, thereby obtaining a more uniform display effect.

[0103] Fig.17 In the illustrated embodiment, in the orthographic projection on the glass substrate Glass, the fourth corner C4 includes two line segments and two arcs between the two line segments, but the present disclosure is not limited thereto, and the number of line segments and arcs can be set according to the required display effect, process parameters in the singulation process, etc. Specifically, the degree of indentation of the fourth corner C4 toward the display area AA can be set according to the length and radius of curvature of the arc, the length of the line segment, the angle between the line segment and the edge to which it is connected, the laser power used in the singulation process, etc. For example, as described above, in order to ensure that the laser energy accumulation caused by the horizontal and vertical scanning of the laser during the singulation process does not damage the crack barrier dam structure Crack Dam, the indentation distance can be set to: D1=a*D0, where a ranges from 1 / 3 to 2 / 3.

[0104] In one embodiment, a=1 / 2, which is equivalent to retracting the portion of the crack blocking channel of the crack blocking dam structure Crack Dam at the corner toward the display area AA by half. Fig.18 Shows Fig.17 In the illustrated embodiment, the fourth corner C4 is retracted by a first length e in a first direction X (transverse or row direction) toward the display area AA, and the fourth corner C4 is retracted by a second length f in a second direction Y (longitudinal or column direction) toward the display area AA, so that the space at the corner becomes larger and the risk of cracks is more resistant.

[0105] As mentioned above, the hybrid OLED display substrate includes a glass substrate and an encapsulation protection layer, and a light-emitting device layer disposed therebetween. In the process of singulating a single OLED display substrate from a hybrid OLED display motherboard, two cutting processes are required. The first cutting process: laser cutting of the encapsulation protection layer; the second cutting process: using a glass cutter to cut the glass substrate. The hybrid OLED display motherboard manufactured on the production line usually includes a plurality of hybrid OLED display substrates arranged in an array of multiple rows and columns. A laser cutting path for the laser cutting process and a knife wheel cutting path for the glass substrate cutting process are disposed between two adjacent hybrid OLED display substrates. Figure 7 As shown, there is usually an offset between the laser cutting path LaCL and the wheel cutting path WhCL, and the laser cutting path is closer to the display area in the hybrid OLED display substrate, specifically, closer to the crack blocking dam structure Crack Dam set in the peripheral edge area of ​​the hybrid OLED display substrate. In order to singulate a single hybrid OLED display substrate from the motherboard, laser cutting and glass knife cutting processes are required in both the horizontal and vertical directions. During the horizontal and vertical laser scanning process, the accumulation of laser energy at the laser cross carbon point position of the horizontal and vertical scanning will cause the crack blocking channel in the crack blocking dam structure here to be damaged, and it will no longer play the crack blocking function, so it will not be able to prevent the propagation of cracks that may exist in the subsequent glass knife cutting process to the display area AA. To this end, in the hybrid OLED display substrate of the present invention, the crack blocking channel in the crack blocking dam structure Crack Dam located at the periphery of the display substrate is set to avoid the laser cross carbon point, that is, the crack blocking channel near the laser cross carbon point is retracted toward the display area AA. For example, the portion of each crack blocking channel at the corner can be retracted from the position near the laser cross carbon point toward the display area AA so that the distance between each corner and the edge of the edge area CC away from the display area AA is greater than or equal to 1 / 3 of the first width, wherein the first width is the first width of the edge area in the direction from the display area to the edge area. Further, it can be as follows Fig. 9As shown, the portion of the crack blocking channel at the corner is retracted into the packaging transition area BB and covered by the internal packaging layer, so as to reliably keep the portion of the crack blocking channel at the corner sufficiently away from the laser cross carbon point, so that when the power of the laser used to scan and cut the packaging protective layer is large, the crack blocking dam structure Crack Dam will not be damaged, thereby ensuring that external cracks will not be transmitted to the display area AA through the inorganic layer on the glass substrate, ensuring the crack blocking function of the crack blocking dam structure.

[0106] The pixel driving circuit of the light emitting device layer of the hybrid OLED display substrate of the present invention includes a driving TFT (thin film transistor). In addition, it may also include a switching TFT, a storage capacitor, and a gate line, a data line and other structures, which are used together with the driving TFT to drive the OLED device. These structures are the same as those in the related art and are not described in detail here. It should be noted that the driving TFT and the OLED device may adopt any known structure in the related art and the driving TFT and the OLED device may have any known relative position relationship, which is not limited in the embodiment of the present invention.

[0107] Exemplarily, a dam DAM is formed around the display area AA and may be formed of an inorganic material, which is one or a combination of several of Al2O3, TiO2, ZrO2, MgO, HfO2, Ta2O5, Si3N4, AlN, SiN, SiNO, SiO, SiO2, SiOx, SiC and ITO. The cofferdam may also be formed of an organic material, which is one or a combination of PET (polyethylene terephthalate), PEN (polyethylene naphthalate), PC (polycarbonate), PI (polyimide), PVC (polyvinyl chloride), PS (polystyrene), PMMA (polymethyl methacrylate), PBT (polybutylene terephthalate), PSO (polysulfone), PES (polyphenylene sulfone), PE (polyethylene), PP (polypropylene), silicone, PA (polyamide), PVDF (polyvinylidene fluoride), EVA (ethylene-vinyl acetate copolymer), EVAL (ethylene-vinyl alcohol copolymer), PAN (polyacrylonitrile), PVAc (polyvinyl acetate), Parylene (polyparaxylene), Polyurea (polyurea), PTFE (polytetrafluoroethylene) and epoxy resin.

[0108] In the embodiment of the present disclosure, the same organic material as the cofferdam can be used to fill the crack blocking channel in the Crack Dam to form a crack blocking dam structure in which inorganic materials and organic materials are alternately arranged, thereby ensuring the blocking function of the crack blocking dam structure to prevent crack propagation.

[0109] Fig.19The flowchart of the method for preparing the hybrid OLED display substrate according to the embodiment of the present disclosure is shown. As described above, the method for preparing the hybrid OLED display substrate according to the embodiment of the present disclosure includes steps S1201 to S1207.

[0110] In step S1201, the positions of the multiple hybrid OLED display substrates to be formed, the laser cutting paths LaCL and the cutter wheel cutting paths WhCL to be aligned in the cutting process during the singulation process are first set on the glass substrate Glass, so as to determine the intersection of the horizontal laser cutting path and the vertical laser cutting path as the laser cross carbon point, and then form an inorganic layer on the glass substrate Glass, such as Figure 2 As shown, the inorganic layer may include a barrier layer BARRIER and a buffer layer BUFFER, and then a display area, a package transition area and an edge area are set on each hybrid OLED display substrate.

[0111] In step S1202, a plurality of Crack Dam grooves extending toward the glass substrate Glass are formed in the inorganic layer around the area where each hybrid OLED display substrate is located by using exposure, etching, development and other processes, so that the orthographic projection of each Crack Dam groove on the glass substrate Glass is roughly rectangular, and the corners of each rectangle are recessed toward the display area of ​​the corresponding OLED display substrate, so that the corners of each Crack Dam groove are far away from the Laser cross carbon point. For example, the angle of each rectangle can be indented to a side of the edge area close to the packaging transition area or to a side of the packaging transition area away from the display area so as to be covered by the subsequently formed internal packaging layer.

[0112] In step S1203, a light-emitting device layer is formed in the display area of ​​each OLED display substrate on the inorganic layer, a cofferdam structure surrounding the display area is formed in the packaging transition area, and a planarization layer is formed in the display area using an organic material, and a plurality of Crack Dam grooves are filled with the organic material of the planarization layer to form a crack blocking dam structure around the display area, wherein the light-emitting device layer includes a plurality of pixels, each pixel includes a light-emitting device and a pixel driving circuit thereof, and the planarization layer will fill the area between adjacent pixels so that the surface of the formed light-emitting device layer away from the glass substrate Glass is flat, so that the internal packaging layer formed in the subsequent process is also roughly flat, thereby ensuring reliable packaging.

[0113] In step S1204, a first inorganic encapsulation layer is formed on the display area and the encapsulation transition area of ​​each hybrid OLED display substrate, an organic encapsulation layer is formed on the first inorganic encapsulation layer in the display area, and a second inorganic encapsulation layer is formed on the first inorganic encapsulation layer and the organic encapsulation layer, thereby forming an internal encapsulation structure in the display area and the encapsulation transition area. As described above, the internal encapsulation structure includes the first inorganic encapsulation layer, the organic encapsulation layer, and the second inorganic encapsulation layer.

[0114] In step S1205, an encapsulation film layer covering the entire structure is formed to form a hybrid OLED display motherboard, on which a plurality of rows and columns of hybrid OLED display substrates arranged in an array are formed, and these hybrid OLED display substrates are separated by the laser cutting paths and the knife wheel cutting paths as described above.

[0115] In step S1206, cutting is performed along the laser cutting road set between adjacent hybrid OLED display substrates, and then the cut portion of the encapsulation film layer material between two adjacent laser cutting roads is removed, exposing the knife wheel cutting road WhCL between adjacent hybrid OLED display substrates for cutting the glass substrate Glass. Since each corner of the crack blocking channel in the crack blocking dam structure in each hybrid OLED display substrate in the present application is set away from the laser cross carbon point, the crack blocking channel will not be destroyed by the accumulation of laser energy of the longitudinal laser scanning and the transverse laser scanning during the laser cutting process, thereby ensuring that the cracks (also called cracks) generated in the subsequent glass knife cutting process will not be transmitted along the inorganic layer to the display area, and at the same time, it can also ensure that the cracks from the outside of the single hybrid OLED display substrate formed in the subsequent use process will not be transmitted along the inorganic layer to the display area to destroy the light-emitting period therein.

[0116] In step S1207, cutting is performed along the cutter wheel cutting paths arranged between adjacent OLED display substrates to separate the single hybrid OLED display substrates to form independent hybrid OLED display substrates.

[0117] As described above, the present invention improves the crack blocking structure disposed at the periphery which is easily damaged during the singulation process of the hybrid OLED display substrate, and specifically improves the corner of the crack blocking channel of the crack blocking dam structure for preventing crack propagation, which is close to the laser cross carbon point position, so that it is away from the laser cross carbon point during the horizontal and vertical laser cutting, and is indented toward the display area AA. For example, each corner of the crack blocking channel is constructed into a step shape, a broken line shape, a whole arc shape, a segmented arc shape, an oblique line shape, an arc shape and a straight line / oblique line combination shape, etc., so that the corner of each crack blocking channel is indented toward the display area, away from the laser cross carbon point, so that the crack blocking space at the corner position of the crack blocking dam structure becomes larger, so that the hybrid OLED display substrate has a stronger ability to resist crack propagation. In addition, this structure makes each crack blocking channel farther away from the Laser cross-carbon point, so compared with the related technology, it can better avoid the destructive effect of the laser energy accumulation at the Laser cross-carbon point caused by the lateral laser scanning and the longitudinal laser scanning on the crack blocking channel when a single hybrid OLED display substrate is singulated from the hybrid OLED display motherboard.

[0118] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A hybrid OLED display substrate, comprising a display area, a packaging transition area surrounding the display area, and an edge area surrounding the packaging transition area; The hybrid OLED display substrate comprises: Glass substrate; An inorganic layer disposed on the glass substrate; A light-emitting device layer, located in the display area and disposed on a side of the inorganic layer away from the glass substrate, wherein the light-emitting device layer includes a plurality of OLED light-emitting devices; a dam structure, located in the packaging transition region and arranged to extend around the display region; An internal encapsulation layer, located in the display area and the encapsulation transition area, covering the plurality of OLED light-emitting devices and the cofferdam structure; a crack stop dam structure disposed in the inorganic layer; and an encapsulation protection layer, covering the internal encapsulation layer and the crack barrier structure, The crack blocking dam structure includes at least one crack blocking channel extending along the thickness direction of the inorganic layer, each of the at least one crack blocking channel is composed of a groove formed in the inorganic layer and an organic material filled in the groove, and the orthographic projection of each of the at least one crack blocking channel on the glass substrate extends around the orthographic projection of the cofferdam structure on the glass substrate, and the orthographic projection of each of the at least one crack blocking channel on the glass substrate includes a first side and a second side extending along a first direction, a third side and a fourth side extending along a second direction intersecting the first direction, a first corner, a second corner, a third corner, and a fourth corner. The first corner is connected between the first side and the third side, the second corner is connected between the third side and the second side, the third corner is connected between the second side and the fourth side, and the fourth corner is connected between the fourth side and the first side, wherein the at least one crack blocking channel comprises a distal crack blocking channel farthest from the display area, and the extended lines of the first side, the third side, the second side and the fourth side of the distal crack blocking channel respectively intersect to form a quadrilateral, and intersect at a first intersection, a second intersection, a third intersection and a fourth intersection, respectively, and the first corner, the second corner, the third corner and the fourth corner are all located inside the quadrilateral; and The shortest distance between the first corner and the first intersection is at least 1 / 3 of the shortest distance between the first intersection and the display area; The shortest distance between the second corner and the second intersection is at least 1 / 3 of the shortest distance between the second intersection and the display area; The shortest distance between the third corner and the third intersection is at least 1 / 3 of the shortest distance between the third intersection and the display area; and The shortest distance between the fourth corner and the fourth intersection is at least 1 / 3 of the shortest distance between the fourth intersection and the display area; Wherein, each of the first corner portion, the second corner portion, the third corner portion and the fourth corner portion is one of the following structures: Each corner portion includes an arc that is generally protruding toward the display area; Each corner portion includes a plurality of arcs connected end to end, and each arc protrudes toward the display area; Each corner portion includes a plurality of arcs and a plurality of line segments connected end to end, and the plurality of arcs protrude toward the display area; and Each corner includes a broken line structure, which protrudes toward the display area as a whole; the broken line structure includes a plurality of line segments connected end to end, the first ends of the plurality of line segments connected end to end serve as one end of the corner, and the second ends of the plurality of line segments connected end to end serve as the other end of the corner; the angle between each two adjacent line segments among the plurality of line segments is an obtuse angle or a right angle; and the angle between the first ends of the plurality of line segments connected end to end and the corresponding sides of the first side, the second side, the third side and the fourth side connected to the corner and the angle between the second ends of the plurality of line segments connected end to end and the corresponding sides of the first side, the second side, the third side and the fourth side connected to the corner are both obtuse angles or right angles.

2. The hybrid OLED display substrate according to claim 1, wherein: The distance between the first end point of the first side close to the first intersection and the first intersection is equal to the distance between the first end point of the third side close to the first intersection and the first intersection; The distance between the second end point of the third side close to the second intersection and the second intersection is equal to the distance between the first end point of the second side close to the second intersection and the second intersection; The distance between the second end point of the second side close to the third intersection and the third intersection is equal to the distance between the second end point of the fourth side close to the third intersection and the third intersection; as well as The distance between a first endpoint of the fourth side close to the fourth intersection and the fourth intersection is equal to the distance between a second endpoint of the first side close to the fourth intersection and the fourth intersection.

3. The hybrid OLED display substrate according to claim 2, wherein: The shortest distance between the first corner and the first intersection is greater than or equal to the distance between the first end point of the first side close to the first intersection and the first intersection; The shortest distance between the second corner and the second intersection is greater than or equal to the distance between the second end point of the third side close to the second intersection and the second intersection; The closest distance between the third corner and the third intersection is greater than or equal to the distance between the second end point of the second side close to the third intersection and the third intersection; as well as The shortest distance between the fourth corner and the fourth intersection is greater than or equal to the distance between a first endpoint of the fourth side close to the fourth intersection and the fourth intersection.

4. The hybrid OLED display substrate according to claim 2, wherein: The quadrilateral is a rectangle; The point on the first corner that is closest to the first intersection point is located at the midpoint of the hypotenuse of the right triangle formed by the first endpoint of the first side, the first intersection point and the first endpoint of the third side; The point on the second corner that is closest to the second intersection point is located at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the third side, the second intersection point and the first endpoint of the second side; The point on the third corner that is closest to the third intersection point is located at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the second side, the third intersection point and the second endpoint of the fourth side; and The point on the fourth corner that is closest to the fourth intersection point is located at the midpoint of the hypotenuse of the right triangle formed by the second endpoint of the first side, the fourth intersection point and the first endpoint of the fourth side.

5. The hybrid OLED display substrate according to claim 4, wherein: The point on the first corner portion that is closest to the first intersection point is arranged on a side of the packaging transition area away from the display area; The point on the second corner portion that is closest to the second intersection point is arranged on a side of the packaging transition area away from the display area; The point on the third corner portion that is closest to the third intersection point is arranged on a side of the packaging transition region away from the display region; and The point on the fourth corner portion that is closest to the fourth intersection point is arranged on a side of the packaging transition area away from the display area.

6. The hybrid OLED display substrate according to claim 5, wherein: The at least one crack blocking channel includes a plurality of crack blocking channels, and the plurality of crack blocking channels include the distal crack blocking channel and at least one proximal crack blocking channel close to the display area relative to the distal crack blocking channel; The plurality of crack blocking channels extend in parallel around the display area, and the distance between each two adjacent crack blocking channels is the same; The orthographic projection of the point on the first corner of each of the plurality of crack blocking channels that is closest to the first intersection point on the glass substrate is within the packaging transition area and on a side of the orthographic projection of the cofferdam structure on the glass substrate that is away from the display area; The orthographic projection of the point on the second corner of each of the plurality of crack blocking channels that is closest to the second intersection point on the glass substrate is within the packaging transition area and on a side of the orthographic projection of the cofferdam structure on the glass substrate that is away from the display area; The orthographic projection of the point on the third triangular portion of each of the plurality of crack blocking channels that is closest to the third intersection point on the glass substrate is within the packaging transition area and is located on a side of the orthographic projection of the cofferdam structure on the glass substrate that is away from the display area; as well as The orthographic projection of the point on the fourth corner of each of the plurality of crack blocking channels that is closest to the fourth intersection on the glass substrate is within the packaging transition area and on a side of the orthographic projection of the cofferdam structure on the glass substrate that is away from the display area.

7. The hybrid OLED display substrate according to claim 1, wherein: The internal encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer; The first inorganic encapsulation layer is disposed in the display area and the encapsulation transition area, covering each of the first corner, the second corner, the third corner, and the fourth corner and covering the plurality of OLED light-emitting devices; The organic encapsulation layer is disposed in the display area, covering a portion of the first inorganic encapsulation layer in the display area; as well as The second inorganic encapsulation layer is disposed in the display region and the encapsulation transition region, covering the organic encapsulation layer and a portion of the first inorganic encapsulation layer in the encapsulation transition region.

8. The hybrid OLED display substrate according to claim 1, wherein: The first side, the second side, the third side and the fourth side are located in the edge area.

9. The hybrid OLED display substrate according to claim 1, wherein: Each corner includes a plurality of arcs and a plurality of line segments connected end to end; and the plurality of arcs protrude toward the display area; The plurality of arcs and the plurality of line segments include a first line segment connected end to end, a plurality of arcs, and a second line segment, wherein the plurality of arcs are connected end to end and connected between the first line segment and the second line segment; One end of the first line segment that is not connected to the plurality of circular arcs serves as one end of the corner portion, and the other end of the first line segment is connected to one end of the plurality of circular arcs connected end to end; as well as The other ends of the multiple arcs connected end to end are connected to one end of the second line segment, and the other end of the second line segment that is not connected to the multiple arcs serves as the other end of the corner.

10. The hybrid OLED display substrate according to claim 9, wherein: The plurality of end-to-end circular arcs include an even number of end-to-end circular arcs; and The multiple circular arcs connected end to end have the same curvature radius and arc length.

11. The hybrid OLED display substrate according to any one of claims 1 to 8, wherein: The minimum distance between the first corner, the second corner, the third corner and the fourth corner of the at least one crack blocking channel closest to the display area and the display area is greater than or equal to the minimum distance between the first side, the second side, the third side and the fourth side of the crack blocking channel and the display area.

12. The hybrid OLED display substrate according to claim 11, wherein: The minimum distance between the first corner, the second corner, the third corner and the fourth corner of the crack blocking channel closest to the display area in the at least one crack blocking channel and the display area ranges from 50µm to 70µm.

13. A hybrid OLED display motherboard, comprising a plurality of hybrid OLED display substrates according to any one of claims 1 to 12 arranged in an array of multiple rows and columns on a glass substrate, the hybrid OLED display motherboard further comprising: Two row-direction laser cutting lanes extending along the row direction between every two adjacent rows of hybrid OLED display substrates and respectively close to each row of hybrid OLED display substrates, and one row-direction cutter wheel cutting lane between the two row-direction laser cutting blades; and Two column-direction laser cutting lanes extending along the column direction between every two adjacent columns of hybrid OLED display substrates and respectively close to each column of hybrid OLED display substrates, and one column-direction cutter wheel cutting lane between the two column-direction laser cutting blades; The intersection of each laser cutting track in the column direction and each laser cutting track in the row direction is a laser cross carbon point, and Each of the first corner, the second corner, the third corner and the fourth corner of the distal crack blocking channel included in each of the multiple hybrid OLED display substrates is arranged between its closest laser cross carbon point and the display area of ​​the hybrid OLED display substrate.

14. The hybrid OLED display motherboard according to claim 13, wherein: The laser cross carbon point closest to each of the first corner, the second corner, the third corner and the fourth corner of the distal crack blocking channel included in each of the multiple hybrid OLED display substrates coincides with a corresponding one of the first intersection point, the second intersection point, the third intersection point and the fourth intersection point.

15. A method for preparing a hybrid OLED display substrate according to any one of claims 1 to 12, comprising: The positions of a plurality of hybrid OLED display substrates to be formed, a plurality of laser cutting paths in the row direction and a plurality of laser cutting paths in the column direction to be singulated, and a cutter wheel cutting path between every two adjacent laser cutting paths are set on a glass substrate, and the intersection of the laser cutting paths in the row direction and the laser cutting paths in the column direction are determined as laser cross carbon points; forming an inorganic layer on a glass substrate, and setting a display area, a packaging transition area, and an edge area of ​​each hybrid OLED display substrate to be formed; A plurality of grooves extending in the thickness direction of the inorganic layer are formed in the inorganic layer and at the periphery of each hybrid OLED display substrate to be formed, so that each groove includes a first side and a second side extending in the row direction, a third side and a fourth side extending in the column direction, a first corner between the first side and the third side, a second corner between the third side and the second side, a third corner between the second side and the fourth side, a fourth corner between the fourth side and the first side, and each of the first corner, the second corner, the third corner and the fourth corner of the distal groove farthest from the display area among the plurality of grooves is arranged between the closest laser cross carbon point and the display area of ​​the corresponding hybrid OLED display substrate to be formed; For each hybrid OLED display substrate, a light emitting device layer is formed in the display area of ​​the hybrid OLED display substrate to be formed on the inorganic layer, a dam structure surrounding the display area is formed in the encapsulation transition area, and a planarization layer is formed in the display area using an organic material, and the plurality of grooves are filled with an organic material of the planarization layer to form a plurality of crack blocking channels of the crack blocking dam structure surrounding the display area, wherein the light emitting device layer includes a plurality of OLED light emitting devices; Forming a first inorganic encapsulation layer on the display area and the encapsulation transition area of ​​each hybrid OLED display substrate, forming an organic encapsulation layer on the first inorganic encapsulation layer in the display area, and forming a second inorganic encapsulation layer on the first inorganic encapsulation layer and the organic encapsulation layer, thereby forming an internal encapsulation structure in the display area and the encapsulation transition area; Forming an encapsulation film layer covering the entire structure, thereby forming a hybrid OLED display motherboard, on which a plurality of rows and columns of hybrid OLED display substrates arranged in an array are formed; Cutting along the laser cutting lanes, and then removing the cut portion of the encapsulation film layer material between two adjacent laser cutting lanes, exposing the cutter wheel cutting lane between the two adjacent laser cutting lanes; and Cutting is performed along the cutter wheel cutting path to cut off the glass substrate between two adjacent hybrid OLED display substrates, so as to separate a single hybrid OLED display substrate to form an independent hybrid OLED display substrate.

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