Display substrate, display panel, display device, and method of manufacturing display substrate

Abstract

The present disclosure provides a display substrate, a display panel, a display device, and a method for manufacturing a display substrate, wherein the display area includes a first display area including a first thin film encapsulation structure, a second display area including a second thin film encapsulation structure, and a transition display area including a third thin film encapsulation structure, wherein the first thin film encapsulation structure includes a first inorganic encapsulation layer, a first organic encapsulation layer, and a second inorganic encapsulation layer, the second thin film encapsulation structure includes the first inorganic encapsulation layer, the second inorganic encapsulation layer, and the second organic encapsulation layer, the third thin film encapsulation structure includes a first portion and a second portion, wherein the first portion includes the first inorganic encapsulation layer, the first organic encapsulation layer, the second inorganic encapsulation layer, and the second organic encapsulation layer. The display substrate, display panel, display device, and method for manufacturing a display substrate according to the present disclosure can improve a user's visual experience.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from PCT Patent Application No. PCT / CN2020 / 089413, filed in China on May 9, 2020, the entire contents of which are incorporated herein by reference. The present disclosure relates to the field of displays, and in particular to a display substrate, a display panel, a display device, and a method for manufacturing a display substrate. [Background technology]

[0002] An organic light-emitting diode (OLED) has an organic compound film that emits light in response to an electric current, with the organic material sandwiched between two electrodes, at least one of which is a light-transmitting electrode. OLEDs are excellent candidates for use as display screens because of their good light-emitting performance and efficiency, and the low driving voltage required. Summary of the Invention [Problem to be solved by the invention]

[0003] The embodiments of the present disclosure provide a display substrate, a display panel, a display device, and a method for manufacturing a display substrate, which can improve a user's visual experience. [Means for solving the problem]

[0004] The technical solutions according to the embodiments of the present disclosure are as follows:

[0005] An embodiment of the present disclosure is a display substrate, comprising a display area, the display area including: a first display area including a plurality of display units provided on a base and a first thin film encapsulating structure provided on a light-emitting side of the plurality of display units; a second display area including a plurality of display units provided on the base and a second thin film encapsulating structure provided on the light-emitting side of the plurality of display units; The display device includes a plurality of display units disposed on a base, and a third thin film encapsulation structure disposed on a light-emitting side of the plurality of display units, and a transition display area located between the first display area and the second display area; the first thin film encapsulation structure includes a first inorganic encapsulation layer, a first organic encapsulation layer, and a second inorganic encapsulation layer, which are sequentially stacked on the light-emitting sides of the plurality of display units; the second thin film encapsulating structure includes a first inorganic encapsulating layer, a second inorganic encapsulating layer, and a second organic encapsulating layer, which are sequentially stacked on the light-emitting sides of the plurality of display units; The third thin film sealing structure includes a first portion located closer to the first display area and a second portion located closer to the second display area, the first portion including a first inorganic sealing layer, a first organic sealing layer, a second inorganic sealing layer and a second organic sealing layer stacked in sequence on the light-emitting side of the plurality of display units, and the second portion including a first inorganic sealing layer, a second inorganic sealing layer and a second organic sealing layer stacked in sequence on the light-emitting side of the plurality of display units, thereby providing a display substrate.

[0006] Illustratively, the light transmittance of the second organic sealing layer is greater than the light transmittance of the first organic sealing layer.

[0007] Illustratively, the display area includes: a plurality of sides, adjacent sides intersecting to form a plurality of corners; The second display area is located at at least one of the corners.

[0008] Illustratively, a first barrier is provided between the first display area and the transition display area, and a second barrier is provided between the second display area and the transition display area.

[0009] For example, a first barrier and a second barrier are provided in the transition display area, and the first barrier and the second barrier do not overlap with the display unit of the transition display area when projected orthogonally on the base, and the first barrier is provided on a side of the transition display area closer to the first display area, and the second barrier is provided on a side of the transition display area closer to the second display area.

[0010] Illustratively, the first inorganic sealing layer, the first organic sealing layer, and the second inorganic sealing layer of the portion are formed by extending the first thin film sealing structure to a side where the transition display area is located, and the first inorganic sealing layer, the first organic sealing layer, and the second inorganic sealing layer of the portion cover the first barrier; the second portion is formed by extending the second thin film sealing structure toward the transition display area, and the second portion covers the second barrier; The second organic sealing layer in the first portion is formed by extending the second organic sealing layer in the second portion toward the side where the transition display area is located.

[0011] Illustratively, the first organic sealing layer of the portion has an inclined surface on the side closer to the second display area, and the second organic sealing layer of the portion covers the side of the inclined surface farther from the base.

[0012] Illustratively, the second organic sealing layer in the second thin film sealing structure and the second organic sealing layer in the third thin film sealing structure have surfaces that are substantially flush with each other on the side farther from the base.

[0013] Illustratively, the first display area has a first pixel density, the second display area has a second pixel density, and the transition display area has a third pixel density, and the second pixel density and the third pixel density are both less than or equal to the first pixel density.

[0014] Illustratively, the second display area includes: an extensible base, wherein a plurality of aperture patterns are distributed along a surface of the extensible base, each of the plurality of aperture patterns includes a plurality of first apertures, and a plurality of bridge areas surrounding island areas are formed between at least some adjacent first apertures among the plurality of first apertures, and a plurality of second display units are provided on the island areas formed in each aperture pattern; The display device further includes a plurality of wiring units respectively connected between the plurality of display units on the island area and provided in the plurality of bridge areas.

[0015] Illustratively, at least one of the plurality of display units comprises: a first planarization layer positioned in front of the base along the light-emitting direction of the display substrate; an organic insulating layer located on the first planarization layer farther from the base; a first electrode layer located on the first planarization layer farther from the base, the first barrier includes a first groove, the first groove being disposed on the first planarization layer, and the organic insulating layer covering the first groove in a conformal manner; or the first groove being disposed on the organic insulating layer; the second barrier includes a second groove, the second groove being disposed on the first planarization layer, and the organic insulating layer covering the second groove in accordance with the shape of the second groove; or the second groove being disposed on the organic insulating layer; the first inorganic sealing layer is located on a side of the first electrode layer farther from the base and covers the first electrode layer; the first organic sealing layer covers a portion of the first inorganic sealing layer that is located farther from the second groove, the first groove, and a portion between the first groove and the second groove that is closer to the first groove, but does not cover a portion of the first inorganic sealing layer that is located near the second groove between the first groove and the second groove, the second groove, or a portion of the second groove that is farther from the first groove, the second inorganic sealing layer covers the first organic sealing layer and a portion of the first inorganic sealing layer that is not covered by the first organic sealing layer; The second organic sealing layer covers the portion of the second inorganic sealing layer located in the first groove and the portion of the first groove located on the side farther from the first display area, but does not cover the first opening.

[0016] Exemplarily, the organic insulating layer includes a first post spacer provided in the first display area, a second post spacer provided in the transition display area, and a third post spacer provided in the second display area, and the first groove is provided on the first post spacer, and the second groove is provided on the second post spacer.

[0017] Exemplarily, the first groove and the second groove include a continuous groove extending along a first direction, and the first direction is the direction in which a boundary line between the first display area and the transition display area extends.

[0018] For example, the continuous groove has a groove width in the second direction of about 5 to 15 μm and a groove height in the third direction of about 1~ 2.5 μm, the second direction is perpendicular to the first direction and parallel to the extensible base, and the third direction is perpendicular to the extensible base.

[0019] Illustratively, the first groove and / or the second groove include at least one row of discrete grooves arranged sequentially in a second direction, the second direction being perpendicular to the first direction and parallel to the extensible base, and each row of discrete grooves includes a plurality of discrete grooves spaced apart along the first direction.

[0020] Illustratively, the at least one row of discrete grooves includes a plurality of rows of discrete grooves, and the interval between adjacent rows of the discrete grooves is about 2 to 15 μm.

[0021] Illustratively, at least one of the plurality of display units comprises: a first isolation structure disposed between the second groove and the first opening, the first isolation structure separating the first electrode layers on both sides of the first isolation structure; The first electrode layer covers the first isolation structure and is located on a side of the first isolation structure adjacent to the second groove and a side of the first isolation structure adjacent to the first opening.

[0022] Illustratively, at least one of the plurality of display units in the second display area includes: a first passivation layer, a portion of which is located between the organic insulating layer in the second display area and the first opening, and at least a portion of which is located on a side of the first planarization layer away from the extensible base; The first isolation structure includes at least one third groove located in the first passivation layer and the first planarization layer, and the first electrode layer covered by the bottom of the at least one third groove and the first electrode layer covering the surface of the first passivation layer are separated from each other.

[0023] Illustratively, at least one of the plurality of display units in the second display area includes: a second passivation layer at least partially located on a side of the first planarization layer proximate to the extensible base; The first passivation layer includes a first portion located on a side of the first planarization layer farther from the extensible base and a second portion located on a side of the first planarization layer adjacent to the first opening, and the second portion covers the surface of the first planarization layer adjacent to the first opening and is connected to the surface of the second passivation layer so that the first passivation layer provides isolation protection for the surface of the first planarization layer adjacent to the first opening.

[0024] Illustratively, at least one of the plurality of display units in the second display area includes: further comprising an interlayer insulating layer positioned on the front side of the extensible base along the light-emitting direction of the display substrate; The first isolation structure includes at least one first bump located on a surface of the interlayer insulating layer farther from the extensible base, and the first electrode layer covers the top of the at least one first bump and a portion of the surface of the interlayer insulating layer, and the first electrode layer located on the top of the at least one first bump and the first electrode layer located on the surface of the interlayer insulating layer are separated from each other.

[0025] Illustratively, at least one of the plurality of wiring units includes: a second planarization layer positioned in front of the extensible base along the light-emitting direction of the display substrate; a pixel-defining layer located on a side of the second planarization layer away from the extensible base, covering a portion of the surface of the second planarization layer, and having at least one fourth groove; a third electrode layer covered by a bottom of the at least one fourth groove and covering a surface of the pixel defining layer; The third electrode layer covered by the bottom of the at least one fourth groove and the third electrode layer covered by the surface of the pixel defining layer are separated from each other.

[0026] For example, the number of third grooves among the at least one third groove is the same as the number of fourth grooves among the at least one fourth groove, and the at least one fourth groove and the at least one third groove are connected to each other and formed in a closed ring shape surrounding the first opening.

[0027] Illustratively, at least one of the plurality of wiring units includes: a gate insulating layer positioned in front of the extensible base along a light-emitting direction of the display substrate; at least one second bump located on a surface of the gate insulating layer facing away from the extensible base; a third electrode layer covering a top portion of the at least one second bump and a portion of the surface of the gate insulating layer that is not covered by the at least one second bump, The third electrode layer covering the top of the at least one second bump and the third electrode layer covering the surface of the gate insulating layer are separated from each other.

[0028] Illustratively, the number of second bumps among the at least one second bump is the same as the number of first bumps among the at least one first bump, and the at least one second bump and the at least one first bump are connected to each other and formed in a closed ring shape surrounding the first opening.

[0029] For example, the first aperture includes an opening end located farther from the base, a bottom end located closer to the base, and a hole body portion located between the opening end and the bottom end, and the opening width of at least one of the multiple first apertures is such that the opening width of the hole body portion gradually increases along the light emission direction of the display substrate, the opening width of the opening end is smaller than the maximum opening width of the hole body portion, and the maximum opening width of the hole body portion is larger than the opening width of the bottom end.

[0030] Illustratively, at least a portion of the side wall of the hole portion near the open end has an arc-shaped curved surface.

[0031] An embodiment of the present disclosure includes: a display substrate according to an embodiment of the present disclosure; The present invention further provides a display panel, which includes a cover plate located on the light-emitting side of the display substrate and sealed with the display substrate.

[0032] An embodiment of the present disclosure includes: There is also provided a display device including a display panel according to an embodiment of the present disclosure.

[0033] An embodiment of the present disclosure includes: Preparing the base and a display area, the display area including a first display area including a plurality of display units provided on a base and a first thin film encapsulating structure provided on a light-emitting side of the plurality of display units; a second display area including a plurality of display units provided on the base and a second thin film encapsulating structure provided on a light-emitting side of the plurality of display units; and a transition display area including a plurality of display units provided on the base and a third thin film encapsulating structure provided on a light-emitting side of the plurality of display units, the transition display area being located between the first display area and the second display area, the first thin film encapsulating structure being formed by sequentially stacking a first inorganic encapsulating layer, a first organic encapsulating layer and a second thin film encapsulating structure on the light-emitting side of the plurality of display units; the second thin film encapsulating structure includes a first inorganic encapsulating layer, a second inorganic encapsulating layer, and a second organic encapsulating layer stacked in sequence on the light-emitting side of the plurality of display units; the third thin film encapsulating structure includes a first portion located closer to the first display area and a second portion located closer to the second display area, the first portion including the first inorganic encapsulating layer, a first organic encapsulating layer, and a second inorganic encapsulating layer stacked in sequence on the light-emitting side of the plurality of display units; and the second portion including the first inorganic encapsulating layer, a second inorganic encapsulating layer, and a second organic encapsulating layer stacked in sequence on the light-emitting side of the plurality of display units.

[0034] Exemplarily, forming the display area on the base specifically includes: forming a first barrier and a second barrier in the display area; forming a first inorganic sealing layer in the display area; printing a first organic material on the first inorganic sealing layer to form a first organic material layer, a portion of which is located in the first display area and another portion of which extends to cover the first barrier and / or the second barrier; performing a thinning process on the first organic material layer to remove a portion of the first organic material layer, thereby forming the first organic sealing layer, so that the first inorganic sealing layer in the transition display area is at least partially exposed; forming a second inorganic sealing layer that partially covers the first organic sealing layer and partially covers a portion of the first inorganic sealing layer that is not covered by the first organic sealing layer; and applying a second organic sealing layer onto the second inorganic sealing layer so that a portion of the second organic sealing layer covers a portion of the second inorganic sealing layer that covers the first organic sealing layer, and another portion of the second organic sealing layer covers a portion of the first inorganic sealing layer that is not covered by the first organic sealing layer. [Effects of the Invention]

[0035] The beneficial effects of the embodiments of the present disclosure are as follows: According to the display substrate, display panel, display device, and manufacturing method of the display substrate according to the embodiments of the present disclosure, the thin film encapsulation layer structure is different in different regions of the display area, which can ensure the light output efficiency and product life of different regions of the display area and improve the visual experience of users.

[0036] The drawings, which form a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the disclosure. The present disclosure can be more clearly understood from the following detailed description taken in conjunction with the drawings, in which: [Brief explanation of the drawings]

[0037] [Figure 1] 1 is a structural schematic diagram of an embodiment of a display panel according to the present disclosure. [Figure 2] FIG. 2 is a schematic diagram illustrating the layout of a display substrate in an embodiment of a display panel according to the present disclosure. [Figure 3] 1 is a partial top view of a first display area, a second display area, and a transition display area in one embodiment of a display panel according to the present disclosure. [Figure 4] 10 is a structural schematic diagram of a display substrate in an embodiment of a display panel according to the present disclosure, in which a portion corresponding to a second display area is formed on a glass substrate. [Figure 5]10 is a structural schematic diagram of a display substrate in an embodiment of a display panel according to the present disclosure, in which a portion corresponding to a second display area is detached from a glass substrate. [Figure 6] 1 is a structural schematic diagram of a display substrate in an embodiment of a display panel according to the present disclosure, in which portions corresponding to a first display area, a second display area, and a transition display area are formed on a glass substrate. [Figure 7] 10 is a structural schematic diagram of a display substrate in another embodiment of a display panel according to the present disclosure, in which portions corresponding to a first display area, a second display area, and a transition display area are formed on a glass substrate. [Figure 8] 3A to 3C are schematic diagrams illustrating the layout of island areas, first apertures, and bridge areas in some embodiments of display panels according to the present disclosure. [Figure 9] 3A to 3C are schematic diagrams illustrating the layout of island areas, first apertures, and bridge areas in some embodiments of display panels according to the present disclosure. [Figure 10] 3A to 3C are schematic diagrams illustrating the layout of island areas, first apertures, and bridge areas in some embodiments of display panels according to the present disclosure. [Figure 11] 3A to 3C are cross-sectional schematic diagrams of first grooves in some embodiments of display panels according to the present disclosure. [Figure 12] 3A to 3C are cross-sectional schematic diagrams of first grooves in some embodiments of display panels according to the present disclosure. [Figure 13] 1A to 1C are schematic diagrams illustrating some steps of an embodiment of a method for manufacturing a display panel according to the present disclosure. [Figure 14] 1A to 1C are schematic diagrams illustrating some steps of an embodiment of a method for manufacturing a display panel according to the present disclosure. [Figure 15] 2A to 2C are schematic diagrams illustrating some steps of an embodiment of a method for manufacturing a display panel according to the present disclosure. [Figure 16] 1A to 1C are schematic diagrams illustrating some steps of an embodiment of a method for manufacturing a display panel according to the present disclosure.

[0038] It should be understood that the dimensions of the various parts shown in the drawings are not drawn to scale, and the same or similar reference numerals refer to the same or similar components. DETAILED DESCRIPTION OF THE INVENTION

[0039] Each exemplary embodiment of the present disclosure will be described in detail below with reference to the drawings. The description of the exemplary embodiments is merely illustrative and should not be construed as any limitation on the present disclosure and its application or use. The present disclosure is not limited to the embodiments described in the specification, but can be embodied in many different forms. These embodiments are provided to make the disclosure thorough and complete, and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the relative arrangement of parts and steps, components of materials, numerical expressions and values described in these embodiments should not be construed as limiting, but merely illustrative.

[0040] The terms "first," "second," and similar terms used in this disclosure do not denote any order, quantity, or importance, but are merely used to distinguish between different components. Terms such as "comprise," "include," and similar terms mean that the element appearing before the term encompasses the element appearing after the term, but are not intended to exclude the possibility of including other elements. Terms such as "top," "bottom," "left," and "right" are used only to indicate relative positions, and when the absolute position of the described object changes, the relative positions change accordingly.

[0041] In the present disclosure, when a particular element is described as being located between a first element and a second element, there may or may not be an intervening element between the particular element and the first element or the second element. When a particular element is described as being connected to another element, the particular element may be directly connected to the other element without an intervening element, or may be not directly connected to the other element but may have an intervening element.

[0042] Unless otherwise defined, all terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by a person skilled in the art to which this disclosure belongs. It should also be understood that terms defined in general dictionaries, etc. should be interpreted to have a meaning consistent with the meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formalized sense unless clearly defined in the specification.

[0043] In this disclosure, the term "about" means that the numerical ranges and / or values recited herein are substantially the same numerical ranges and / or values within acceptable process and measurement errors.

[0044] Techniques, methods and apparatus known to those skilled in the relevant arts will not be discussed in detail, but where appropriate, said techniques, methods and apparatus should be considered part of the specification.

[0045] In some related art, flexible OLEDs use polymer materials as protective cover plates, making the resulting OLED devices less susceptible to cracking. The inventors have found through research that some OLED flexible display devices have black bands at the corners, affecting the user's visual experience. To improve the user's visual experience, the display substrate can provide display areas at the corners of the display screen to eliminate the black bands. However, there is a difference in light emission between the normal display area and the corner display areas, which can easily cause visible color mixing.

[0046] In view of this, the embodiments of the present disclosure provide a display substrate, a display panel, a display device, and a method for manufacturing a display substrate, which can improve the visual experience of users.

[0047] Fig. 1 is a structural diagram of an embodiment of a display panel, and Fig. 2 is a layout diagram of a display substrate in the embodiment of the display panel shown in Fig. 1.

[0048] 1 and 2, in some embodiments, a display panel includes a display substrate A and a cover plate B. The cover plate B is located in front of the display substrate A along the light output direction of the display substrate A, i.e., on the light-emitting side of the display substrate A. The display substrate A and the cover plate B may be sealed with a sealant C (e.g., optical adhesive OCA, etc.). In FIG. 2, the display substrate A has a display area A1 and a non-display area A2 surrounding the display area A1. The display substrate A may be sealed with the cover plate B in the non-display area A2. The cover plate B may be made of a rigid or flexible material, such as glass or a colorless polyimide (CPI) thin film.

[0049] Referring to FIG. 2, the display area A1 includes multiple side edges A11, and adjacent side edges A11 intersect to form multiple corners A12. In FIG. 2, the display area A1 has two pairs of opposing side edges A11, and the adjacent side edges A11 are perpendicular to each other. Accordingly, the display area A1 has four corners A12. The display area A1 includes a first display area A13, a second display area A14, and a transition region A15 between the first display area A13 and the second display area A14. The first display area A13 has a first pixel density, the second display area A14 has a second pixel density, and the transition region A15 has a third pixel density. The second pixel density is lower than the first pixel density, and the third pixel density is equal to or between the first pixel density and the second pixel density. Here, pixel density refers to the number of pixels per unit area.

[0050] Referring to FIG. 2, in some embodiments, the second display area A14 is located at at least one of the corners A12. In FIG. 2, a second display area A14 is provided at each of the four corners A12. In some related art, the gap between the corners of the display substrate and the cover plate is filled and sealed with organic ink, resulting in black bands at the corners. In light of this, in this embodiment, the second display area, which has a lower pixel density than the first display area, is provided at the corners. This allows for image display at the corners, improving the screen occupancy rate and narrowing the display frame, providing users with a better visual experience while also reducing the difficulty of the corner processing process.

[0051] Fig. 3 is a schematic diagram of a partial top view of an embodiment of a display panel according to the present disclosure. Fig. 4 is a structural schematic diagram of an embodiment of a display panel according to the present disclosure, in which a portion of a display substrate corresponding to a second display area is formed on a glass substrate. Fig. 5 is a structural schematic diagram of an embodiment of a display panel according to the present disclosure, in which a portion of a display substrate corresponding to the second display area is detached from the glass substrate.

[0052] 3 to 5, in some embodiments, the second display area A14 includes an extensible base 1, a plurality of display units 2, and a plurality of wiring units 3. The extensible base 1 may be made of a flexible material, such as polyimide (PI). Referring to FIG. 3, the extensible base 1 includes a plurality of aperture patterns 10 (e.g., an aperture pattern formed by a plurality of apertures within the dashed-line frame in FIG. 3) distributed along the surface of the extensible base 1. Each of the aperture patterns 10 includes a plurality of first apertures 11, and a plurality of bridge areas 12 surrounding an island area 13 are formed between at least some adjacent first apertures 11. Providing the plurality of aperture patterns 10 on the extensible base 1 enables the second display area A14 to achieve an extensible display. The extensible display in the second display area allows the corners of the display area of the display substrate and the cover plate to be more tightly attached, thereby reducing or avoiding the occurrence of air bubbles or other problems that affect the attachment between the corners and the cover plate during sealing.

[0053] In FIG. 3 , three first apertures 11 are provided around each of the four peripheries of the island area 13 of the aperture pattern 10. The three first apertures 11 form two bridge areas 12 between adjacent first apertures 11. In some other embodiments, the positions of the first apertures 11 around the island area 13 relative to the island area 13 and the number of the first apertures 11 are not limited to those shown in FIG. 3 . The width of the first apertures 11 may be approximately 15 to 25 μm. Referring to FIG. 4 , in some embodiments, a plurality of display units 2 are provided on the island area 13 formed in each aperture pattern 10, and a plurality of wiring units 3 are respectively connected between the plurality of display units 2 and respectively provided in the plurality of bridge areas 12. The display units 2 include display subpixels (e.g., RGB subpixels) and driving circuits to display an image. The plurality of display units 2 are connected to each other via a plurality of wiring units 3.

[0054] To ensure that the display units in each display area can emit light normally and prevent material failure and electrode corrosion, each display area may be encapsulated and protected by a thin film encapsulation layer, where the first display area A13 includes a plurality of display units mounted on a base and a first thin film encapsulation structure disposed on the light-emitting sides of the display units, the second display area A14 includes a plurality of display units mounted on a base and a second thin film encapsulation structure disposed on the light-emitting sides of the display units, and the transition display area A15 includes a plurality of display units mounted on a base and a third thin film encapsulation structure disposed on the light-emitting sides of the display units.

[0055] In some related art, the thin-film encapsulation layer on the display substrate typically has a laminated structure formed by a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked sequentially on the light-emitting side of the display unit. The first inorganic encapsulation layer and the second inorganic encapsulation layer may be formed by plasma-enhanced chemical vapor deposition, and the organic encapsulation layer may be formed by printing. To prevent the organic material (e.g., organic ink) printed on the organic encapsulation layer from overflowing into the first aperture and exposing the display unit in the second display area A14 to the risk of corrosion by moisture and oxygen, a barrier may be provided between the display unit in the second display area A14 and the first aperture to achieve edge position control for the organic material. However, if the thin-film encapsulation layers in the second display area A14 and the transition display area A15 both use the same thin-film encapsulation layer structure as the first display area A13, and the pixel density of the second display area A14 and the transition display area A15 is lower than that of the first display area A13, the transition display area A15 and the second display area A14 will be affected, resulting in abnormal light emission and visible color mixing.

[0056] In order to solve the above problem, referring to FIG. 6, FIG. 6 is a cross-sectional structural view of the thin film encapsulation layer structures of the first display area A13, the second display area A14, and the transition display area in a display substrate according to an embodiment of the present disclosure. The first thin film encapsulation structure in the first display area A13 includes a first inorganic encapsulation layer 251, a first organic encapsulation layer 252, and a second inorganic encapsulation layer 253, which are sequentially stacked on the light-emitting side of the plurality of display units. The second thin film encapsulation structure in the second display area A14 includes a first inorganic encapsulation layer 251, a second inorganic encapsulation layer 253, and a second organic encapsulation layer 254, which are sequentially stacked on the light-emitting side of the plurality of display units. The third thin film encapsulation structure includes a first portion 25 The first portion 250A is located closer to the first display area A13, and the second portion 250B is located closer to the second display area A14. The first portion 250A includes a first inorganic sealing layer 251, a first organic sealing layer 252, a second inorganic sealing layer 253, and a second organic sealing layer 254, which are sequentially stacked on the light-emitting side of the display units. The second portion 250B includes a first inorganic sealing layer 251, a second inorganic sealing layer 253, and a second organic sealing layer 254, which are sequentially stacked on the light-emitting side of the display units. The light transmittance of the second organic sealing layer 254 is greater than the light transmittance of the first organic sealing layer 252.

[0057] In the above embodiment, the structures of the thin film encapsulation layers of the first display area A13, the second display area A14, and the transition display area A15 are different. The first inorganic encapsulation layer 251 and the second inorganic encapsulation layer 253 may be formed by plasma-enhanced chemical vapor deposition, the first organic encapsulation layer 252 may be formed by printing, and the second organic encapsulation layer 254 may optionally be formed by applying an optical adhesive or the like. The light transmittance of the second organic encapsulation layer 254 is greater than that of the first organic encapsulation layer 252. This makes the light transmittance of the first thin film encapsulation structure smaller than that of the second thin film encapsulation structure and the third thin film encapsulation structure, thereby improving the abnormal luminescence phenomenon in the transition display area A15 and the second display area A14 and enhancing the visual experience.

[0058] In addition, since the first organic sealing layer 252 is completed by printing, and the organic material (e.g., organic ink) of the first organic sealing layer 252 has fluidity, and there is a long uphill distance after printing is completed, the printing ink may be uncontrollable between the first display area A13 and the transition display area A15 (as shown in FIG. 13). Therefore, referring to FIG. 6, in some embodiments, a first barrier 271 is provided between the first display area A13 and the transition display area A15, and the transition display area A15 and the second display area A14 are separated by a second barrier 272, thereby reducing the risk of organic ink spilling.

[0059] Referring to Figure 6, a first barrier 271 is arranged between the luminous areas of the multiple display units in the first display area A13 and the luminous areas of the multiple display units in the transition display area A15, and a second barrier 272 is arranged between the luminous areas of the multiple display units in the second display area A14 and the luminous areas of the multiple display units in the transition display area A15.

[0060] The first inorganic sealing layer 251, the first organic sealing layer 252, and the second inorganic sealing layer 253 of the first portion 250A are formed by extending the first thin film encapsulating structure toward the transition display area A15, and the first inorganic sealing layer 251, the first organic sealing layer 252, and the second inorganic sealing layer 253 of the first portion 250A cover the first barrier 271 but do not cover the second barrier 272. That is, the film layers in the first thin film encapsulating structure of the first display area A13 and the corresponding film layers in the first portion 250A are made of the same material, and when the first thin film encapsulating structure extends a certain distance toward the transition display area A15, it reaches a position where it covers the first barrier 271 but does not cover the second barrier 272, thereby forming the first inorganic sealing layer 251, the first organic sealing layer 252, and the second inorganic sealing layer 253 of the first portion 250A.

[0061] The second portion 250B is formed by extending the second thin film encapsulating structure toward the transition display area A15, and the second portion 250B covers the second barrier 272 but does not cover the first barrier 271; The second organic sealing layer 254 of the first portion 250A is formed by extending the second organic sealing layer 254 of the second portion 250B toward the side where the transition display area A15 is located. That is, each film layer in the second thin film sealing structure of the second display area A14 and each corresponding film layer in the second portion 250B are made of the same material and have the same composition, each film layer in the second thin film sealing structure of the second display area A14 extends a certain distance toward the transition display area A15 to cover the second barrier 272, and the second organic sealing layer 254 of the second portion 250B extends to a position covering the second inorganic sealing layer 253 of the first portion 250A.

[0062] It should be noted that in the above embodiment, the first barrier 271 is disposed between the first display area A13 and the transition display area A15, and the second barrier 272 is disposed between the second display area A14 and the transition display area A15. However, in some other embodiments, A first barrier 271 and a second barrier 272 are provided in the transition display area A15, and the first barrier 271 and the second barrier 272 do not overlap with the display unit of the transition display area A15 when projected orthogonally on the base, and the first barrier 271 is provided on the side of the transition display area A15 closer to the first display area A13, and the second barrier 272 is provided on the side of the transition display area A15 closer to the second display area A14.

[0063] Referring to Figure 6, the first organic sealing layer 252 is completed by printing, and since the printing material is fluid, an inclined surface 2520 is formed on the side closer to the second display area A14, while the second inorganic sealing layer 253 covers the first organic sealing layer 252, so the first portion 250A has an inclined surface 2520 on the side closer to the second display area A14, and the second organic sealing layer 254 of the first portion 250A covers the side of the inclined surface 2520 farther from the base 1.

[0064] Referring to FIG. 6, the surface of the second organic sealing layer 254 in the second thin film sealing structure on the side farther from the base and the surface of the second organic sealing layer 254 in the third thin film sealing structure on the side farther from the base are substantially flush with each other.

[0065] 4 and 5, in some embodiments, the display substrate A is first formed on the glass substrate 4, and then peeled off from the glass substrate 4. During the formation of the display substrate, holes are drilled through all film layers at positions corresponding to the first openings 11, while plating is performed over the entire surface (e.g., the electrode layer and inorganic sealing layer of the display substrate) at positions corresponding to the island areas 13, bridge areas 12, and first openings 11.

[0066] It has been found that when display substrate A is peeled off (for example, by laser lift-off), there is a risk of peeling of the film layer between the film layer located at first opening 11 and the film layer located at the island area and localized irregular cracking of the film layer during the laser lift-off. To solve this process risk, in Figure 4, holes are opened in a direction perpendicular to the display substrate at positions corresponding to first opening 11 on display substrate A, and then film layers such as an electrode layer and an inorganic sealing layer are vapor-deposited over the entire surface, so that film layers such as an electrode layer and an inorganic sealing layer are present inside first opening 11 as well.

[0067] It should be noted that the first apertures 11 may be formed by a dry etching process, subject to process conditions. In some embodiments, the first apertures 11 include an opening end 111 located farther from the base 1, a bottom end 112 located closer to the base 1, and a body portion 113 located between the opening end 111 and the bottom end 112. The width of at least one of the first apertures 11 is gradually increased along the light output direction of the display substrate A, with the opening width d1 at the opening end 111 being smaller than the maximum opening width d2 of the body portion, and the maximum opening width d2 of the body portion 113 being larger than the opening width d3 at the bottom end 112. That is, a first aperture shape is formed that is narrow at the top and bottom and wide at the middle. At least a portion of the sidewall of the body portion 113 near the opening end 111 has an arc-shaped curve.

[0068] According to laser lift-off verification, such an aperture shape allows both the hole wall of the first aperture 11 adjacent to the island area 13 and the hole wall adjacent to the bridge area 12 to form a relatively flat cross section during peeling, thereby effectively improving the process. After peeling, the film layer 15 at the bottom of the first aperture 11 is left on the peeled substrate 4. The flat cross section here means that the disconnected area between the hole walls on both sides of the first aperture 11 and the film layer 15 is relatively flat, and there are no irregularities in the cross section due to localized peeling or irregular film layer fracture. It should be noted that the aperture width of the aperture portion 113 may be in the range of 5 to 25 microns, the aperture width of the opening end 111 may be in the range of 3 to 20 microns, and the depth h of the aperture portion 113 may be in the range of 5 to 25 microns.

[0069] It should be further explained that the difference between the maximum aperture width d2 of the perforated portion 113 and the aperture width d1 of the opening end 111 is in the range of 0.4 to 4 microns. That is, on both opposing sides of the first aperture 11, the aperture width of the perforated portion 113 on each side is larger than the aperture width of the opening end 111 by 0.2 to 2 microns.

[0070] It should be noted here that if the thin film sealing layer structures of the first display area A13, the second display area A14 and the transition display area A15 all use the conventional stacked structure of the first inorganic sealing layer 251, the organic sealing layer and the second inorganic sealing layer 253, there is a risk that the organic sealing layer will overflow into the first opening 11, and if a hole drilling process is used for the first opening 11 through the entire film layer (as shown in Figure 5), there will be an increased risk of peeling of the film layer and localized irregular cracks between the film layer located at the first opening 11 and the film layer located at the island area during laser lift-off of the display substrate.

[0071] In contrast, in the display substrate according to the embodiment of the present disclosure, in the second thin film encapsulating structure in the second display area A14, the second organic encapsulating layer 254 is located at the top of the encapsulating structure, and a material such as photoresist may be selectively used for the second organic encapsulating layer 254. Before peeling off the display substrate, the second organic encapsulating layer 254 may be patterned to remove the second organic encapsulating layer 254 at the position corresponding to the first opening. This reduces the risk of peeling and rupture of the film layer when peeling off the display substrate.

[0072] 6, in some embodiments, the display substrate A is first formed on the glass substrate 4, and then peeled off from the glass substrate 4. During the formation of the display substrate, the positions corresponding to the first openings 11 may be blind holes, i.e., the flexible base may be partially left uncovered. This eliminates the risk of tearing or peeling of the film layer during laser lift-off. In practical applications, depending on the stretchability of the stretchable base, it is possible to select whether the first openings 11 are blind holes or drilled holes that extend through the entire film layer.

[0073] Fig. 6 is a structural schematic diagram of a display substrate in some embodiments of a display panel according to the present disclosure, in which portions corresponding to the first display area A13, the second display area A14, and the transition display area A15 are formed on a glass substrate. Fig. 8 is a structural schematic diagram of a display substrate in some embodiments of a display panel according to the present disclosure, in which portions corresponding to the second display area A14 are formed on a glass substrate. Figs. 9 and 10 are schematic diagrams of the layout of island areas, first apertures, and bridge areas in some embodiments of a display panel according to the present disclosure. Figs. 10 and 11 are schematic cross-sectional views of first grooves in some embodiments of a display panel according to the present disclosure.

[0074] In some embodiments, the first display area A13, the second display area A14 and the transition display area A15 each have multiple display units, and the structures of the display units in each display area may be the same or different.

[0075] 6 as an example, at least one of the plurality of display units 2 includes a thin film transistor 22, a first planarization layer 241, a second electrode layer 243, an organic insulating layer 26, a first organic light-emitting layer 245, and a first electrode layer 244. Referring to FIG. 6, in some embodiments, the organic insulating layer includes a plurality of post spacers (abbreviated as PS).

[0076] 6 and 7, the thin film transistor 22 is disposed on a base 1. The thin film transistor 22 includes an active layer 221, a gate 222, a first source 223, a first drain 224, a second source 225, and a second drain 226. The first source 223 and the first drain 224 are electrically connected to the active layer 221 through via holes, and the second source 225 and the second drain 226 are electrically connected to the first source 223 and the first drain 224 through via holes, respectively. The thin film transistor 22 is not limited to the structure shown in FIGS. 6 and 7, and other structure forms may be used in some embodiments. For example, the thin film transistor may include a single-layer source and drain.

[0077] The first planarization layer 241 is located on the front side of the base 1 along the light-emitting direction of the display substrate, i.e., on the side of the base 1 closest to the cover plate B. Specifically, the first planarization layer 241 is located on the side of the thin film transistor 22 farther from the base 1 and covers the thin film transistor 22. The first planarization layer 241 can be used to provide a flat surface for forming film layers thereon.

[0078] In some embodiments, the organic insulating layer 236 is located on the side of the first planarization layer 241 that is farther from the extensible base 1, the first barrier 271 may include a first groove, the first groove being disposed on the first planarization layer 241, and the organic insulating layer covering the first groove in a conforming manner to form the first barrier 271, and the second barrier 272 may include a second groove, the second groove being disposed on the first planarization layer 241, and the organic insulating layer covering the second groove in a conforming manner to form the second barrier 272.

[0079] In some other embodiments, the first groove and the second groove may be disposed on the organic insulating layer to form a first barrier 271 and a second barrier 272, respectively.

[0080] Specifically, referring to FIG. 6, in some embodiments, the organic insulating layer includes a first post spacer 236a arranged in the first display area A13, a second post spacer 236b arranged in the transition display area A15, and a third post spacer 236c arranged in the second display area A14, and the first groove is arranged on the first post spacer 236a, the second groove is arranged on the second post spacer 236b, and no groove is arranged on the third post spacer 236c.

[0081] A second electrode layer 243 is located on the first planarization layer 241 at a side farther from the extensible base 1 and is electrically connected to the thin film transistor 22 through a via hole.

[0082] A first organic light-emitting layer 245 is located on the side of the second electrode layer 243 that is farther from the base 1. A first electrode layer 244 is located on the side of the first organic light-emitting layer 245 that is farther from the base 1. The first electrode layer 244 also covers the first organic light-emitting layer 245.

[0083] In some embodiments, the second electrode layer 243 is an anode layer and the first electrode layer 244 is a cathode layer. The second electrode layer 243, the first organic light-emitting layer 245, and the first electrode layer 244 can form a light-emitting element driven by the thin film transistor 22. Different materials used for the first organic light-emitting layer 245 can realize different color sub-pixels.

[0084] 6 and 7 , in some embodiments, the first organic sealing layer 252 covers a portion of the first inorganic sealing layer 251 that is located farther from the second groove (i.e., the second barrier 272) in the first groove (i.e., the first barrier 271) and a portion between the first groove and the second groove that is closer to the first groove, but does not cover a portion of the first inorganic sealing layer 251 that is located closer to the second groove between the first groove and the second groove, the second groove, or a portion of the second groove that is farther from the first groove; the second inorganic sealing layer 253 covers the first organic sealing layer 252 and a portion of the first inorganic sealing layer 251 that is not covered by the first organic sealing layer 252; and the second organic sealing layer 254 covers a portion of the second inorganic sealing layer 253 that is located in the first groove and a portion of the first groove that is farther from the first display area, but does not cover the first opening 11.

[0085] The first groove is provided on the side of the first organic insulating layer 236 farther from the base 1, and the second groove is provided on the side of the second organic insulating layer 236 farther from the base 1 and is used to prevent overflow of the organic material forming the first organic sealing layer 252. Thus, the first organic sealing layer 252 covers the portion of the first inorganic sealing layer 251 located farther from the second groove in the first groove and the portion between the first groove and the second groove closer to the first groove, but does not cover the portion of the first inorganic sealing layer 251 located near the second groove between the first groove and the second groove, the second groove, or the portion of the second groove farther from the first groove.

[0086] The positions of the first and second grooves can be determined according to the spacing and arrangement of the sub-pixels in the island areas of the transition display area A15 and the second display area A14.

[0087] 6 and 7, the first groove and the second groove may be completed by an exposure and development process. When printing the organic material, after the organic material flows into the second groove, it is less likely to spill over to the side of the second groove 27 adjacent to the first opening.

[0088] 9, in some embodiments, the first groove and the second groove each include a continuous groove 27a extending along the first direction, which is the direction along which the boundary between the first display area and the transition display area extends, i.e., the length direction of the first aperture 11. Referring to FIGS. 9 and 11, the continuous groove 27a has a groove width w1 in the second direction of approximately 5-15 μm and a groove height h1 in the third direction of approximately 1.0-2.5 μm, where the second direction is perpendicular to the first direction and parallel to the extensible base 1, and the third direction is perpendicular to the extensible base 1. That is, the groove width w1 here refers to the dimension of the continuous groove 27a on the organic insulating layer 236 along the direction perpendicular to the first direction and parallel to the extensible base 1, and the groove height h1 here refers to the dimension of the continuous groove 27a on the organic insulating layer 236 along the direction perpendicular to the extensible base 1.

[0089] 10 , in some embodiments, each of the first groove and the second groove includes at least one row of discrete grooves 27b arranged along the second direction, the second direction being perpendicular to the first direction and parallel to the extensible base, and each row of discrete grooves 27b includes a plurality of discrete grooves 27b spaced apart along the first direction. Wherein, when each of the first groove and the second groove includes at least two rows of discrete grooves 27b, the at least two rows of discrete grooves 27b may be distributed in an array, that is, the row direction of the at least two rows of discrete grooves 27b may be the second direction and the column direction of the at least two rows of discrete grooves 27b may be the first direction.

[0090] 10 and 12, the plurality of discrete grooves 27b have a groove width w2 of about 5-15 μm and a groove height h2 of about 1.0-2.5 μm, where w2 is the dimension of each of the discrete grooves 27b on the organic insulating layer 236 along the second direction, and h2 is the dimension of each of the discrete grooves 27b on the organic insulating layer 236 along the third direction perpendicular to the extensible base 1.

[0091] In FIG. 10, the at least one row of discrete grooves 27b includes a plurality of rows of discrete grooves 27b (for example, two rows of discrete grooves) sequentially arranged in the second direction.

[0092] Among the multiple rows of discrete grooves 27b, the interval d between adjacent rows of discrete grooves 27b is about 2 to 15 μm, where the interval d is the distance along the second direction between the adjacent rows of discrete grooves 27b.

[0093] It should be noted that in some embodiments, the first groove and the second groove have the same shape and size, while in other embodiments, the first groove and the second groove may have different shapes and sizes.

[0094] In the manufacturing process of some display panel embodiments, some film layers (e.g., organic light-emitting layers or electrode layers) are formed by full plating in the second display area A14. Accordingly, to prevent the risk of communication failure between the film layers corresponding to the first apertures and the film layers corresponding to the island areas, in some embodiments, a first isolation structure is provided between the first grooves and the first apertures 11 to achieve a partition effect for the film layers.

[0095] 6 and 8 , in some embodiments, at least one of the plurality of display units 2 further includes a first isolation structure 28, 28′. The first isolation structure 28, 28′ is located between the first groove and the first aperture 11 and is arranged to separate the first electrode layer 244 on both sides of the first isolation structure 28, 28′ so as to increase the effective lateral sealing distance. The first electrode layer 244 covers the first isolation structure 28, 28′ and is located on the side of the first isolation structure 28, 28′ adjacent to the first groove and the side of the first isolation structure 28, 28′ adjacent to the first aperture 11.

[0096] 6, at least one of the plurality of display units 2 further includes a first passivation layer 235. The first passivation layer 235 is located between the third post spacer 236c and the first opening 11, and at least a portion of the first passivation layer 235 is located on a side of the first planarization layer 241 that is farther from the extensible base 1. In addition, at least one of the plurality of display units 2 may further include a first buffer layer 21, a first gate insulating layer 231, a second gate insulating layer 232, an interlayer insulating layer 233, and a second passivation layer 234.

[0097] Research has revealed that when the first inorganic sealing layer 251 and the second inorganic sealing layer 253 are formed using a plasma film formation process, the lateral film layer formed in the area of the first planarization layer 241 close to the first opening 11 (i.e., the portion of the first inorganic sealing layer 251 and the second inorganic sealing layer 253 located on the side wall of the first opening 11) becomes relatively thin due to a large step, and moisture from the first opening 11 side can penetrate from the thin lateral film layer through the first planarization layer into elements such as thin film transistors, which may cause the elements to malfunction.

[0098] 6 and 7, the first passivation layer 235 includes a first passivation portion 235a located on a side of the first planarization layer 241 away from the extensible base 1, and a second passivation portion 235b located on a side of the first planarization layer 241 closer to the first opening 11. The second passivation portion 235b is connected to a surface of the second passivation layer 234 so that the first passivation layer 235 provides isolation protection for the surface of the first planarization layer 241 closer to the first opening 11, thereby reducing or avoiding the risk of moisture from the first opening 11 side penetrating into elements such as thin film transistors through the first planarization layer. In some embodiments, the first passivation layer 235 and the second passivation layer 234 are made of the same material to achieve a tighter bond between them.

[0099] A first buffer layer 21 is located on a side of the extensible base 1 that is close to the first planarization layer 241. A first gate insulating layer 231 is located on a side of the first buffer layer 21 that is far from the extensible base 1 and covers the active layer 221 of the thin film transistor 22. A second gate insulating layer 232 is located on a side of the first gate insulating layer 231 that is far from the extensible base 1 and covers the gate 222 of the thin film transistor 22.

[0100] An interlayer insulating layer 233 is located on the second gate insulating layer 232 at a side farther from the extensible base 1. A second passivation layer 234 is located between the interlayer insulating layer 233 and the first planarization layer 241. A first passivation layer 235 is located on the first planarization layer 241 at a side farther from the extensible base 1, and is located between the organic insulating layer 236 and the first opening 11.

[0101] The gate 222 of the thin film transistor 22 is located on the surface of the first gate insulating layer 231 that is farther from the stretchable base 1. The first source 223 and the first drain 224 of the thin film transistor 22 are located on the surface of the interlayer insulating layer 233 that is farther from the stretchable base 1 and are electrically connected to the active layer 221 through via holes that penetrate the first gate insulating layer 231, the second gate insulating layer 232, and the interlayer insulating layer 233. The second source 225 and the second drain 226 of the thin film transistor 22 are located on the surface of the second passivation layer 234 that is farther from the stretchable base 1 and are electrically connected to the active layer 221 through via holes that penetrate the second passivation layer 234. In some other embodiments, the display unit 2 only includes the first gate insulating layer 231 and does not include the second gate insulating layer 232. In some other embodiments, the thin film transistor 22 includes a source and a drain that are single layers.

[0102] 6 and 7, the first isolation structure 28 includes at least one third groove 281 located in the first passivation layer 235. The first electrode layer 244 covered by the bottom of the at least one third groove 281 is separated from the first electrode layer 244 covering the surface of the first passivation layer 235. Referring to FIGS. 6 and 7, the at least one third groove 281 has a groove width w3 of about 3-10 μm and a groove height h3 of about 1000-3000 nm. The groove width w3 here refers to the dimension of each third groove 281 along the second direction perpendicular to the first aperture 11, and the groove height h3 refers to the dimension of each third groove 281 along the third direction perpendicular to the extensible base 1.

[0103] 6 and 7 , in some embodiments, at least one of the plurality of wiring units 3 includes a second planarization layer 331, a pixel-defining layer 332, and a third electrode layer 333. The second planarization layer 331 is located on the front side of the extensible base 1 along the light-emitting direction of the display substrate, i.e., on the side of the extensible base 1 that is close to the cover plate B. The pixel-defining layer 332 is located on the side of the second planarization layer 331 that is farther from the extensible base 1, covers part of the surface of the second planarization layer 331, and has at least one fourth groove 361.

[0104] 6, at least one of the plurality of interconnect units 3 further includes a second buffer layer 31, a first conductive interconnect 371, a gate insulating layer 32, and a second conductive interconnect 372. The second buffer layer 31 is located on a surface of the extensible base 1. The first conductive interconnect 371 is located on a surface of the second buffer layer 31 that is farther from the extensible base 1. The gate insulating layer 32 is located on a side of the second buffer layer 31 that is farther from the extensible base 1 and covers the first conductive interconnect 371. The second conductive interconnect 372 is located on a surface of the gate insulating layer 32 that is farther from the extensible base 1.

[0105] 6, the second planarization layer 331 is located on the side of the second conductive line 372 that is farther from the extensible base 1 and covers the second conductive line 372. At least one fourth groove 361 is disposed adjacent to the first opening 11. The third electrode layer 333 is covered by the bottom of the at least one fourth groove 361 and covers the surface of the pixel-defining layer 332.

[0106] The third electrode layer 333 covered by the bottom of at least one fourth groove 361 and the third electrode layer 333 covering the surface of the pixel defining layer 332 are separated from each other, thereby separating the third electrode layer 333 located in the bridge area from the third electrode layer 333 corresponding to the first opening 11, and preventing the film layer corresponding to the first opening from communicating with the film layer corresponding to the island area via the film layer corresponding to the bridge area.

[0107] In the embodiments shown in FIGS. 4 and 5, the display substrate is formed on the glass substrate 4 and then peeled off by a laser. Accordingly, in some embodiments, to simplify the process, the corresponding film layers provided in the first display area A13, the second display area A14, and the transition display area A15 may be located in the same layer and made of the same material, and the corresponding film layers in the island area and bridge area of the second display area A14 may be located in the same layer and made of the same material. The term "located in the same layer and made of the same material" used here and hereafter refers to a layer structure formed by forming film layers for forming specific patterns using the same film deposition process and then patterning the film layers using the same mask in a single patterning process. Depending on different specific patterns, a single patterning process may include multiple exposure, development, or etching processes, and the specific patterns in the formed layer structure may be continuous or discontinuous. These specific patterns may be located at different heights or have different thicknesses.

[0108] For example, the second buffer layer 31 and the first buffer layer 21 are located in the same layer and are made of the same material. The first conductive wiring 371 and some of the sources and drains (e.g., the first source 223 and the first drain 224) of the thin film transistor 22 are located in the same layer and are made of the same material, so that the second conductive wiring 372 and some of the sources and drains (e.g., the second source 225 and the second drain 226) of the thin film transistor 22 are located in the same layer and are made of the same material, the second planarization layer 331 and the first planarization layer 241 are located in the same layer and are made of the same material, and the third electrode layer 333 and the first electrode layer 244 are located in the same layer and are made of the same material.

[0109] 9 and 10 , in some embodiments, the number of the at least one fourth groove 361 is the same as the number of the third grooves 281 among the at least one third groove 281, and the at least one third groove 361 and the at least one third groove 281 are connected to each other to form a closed ring surrounding the first aperture 11. In FIGS. 9 and 10 , the two third grooves 281 (281a, 281b) on the side of the first aperture 11 adjacent to the subpixels in the island area are connected to the two fourth grooves 361 (361a, 361b) on the side of the first aperture 12 adjacent to the bridge area.

[0110] Compared to the embodiment shown in FIG. 6 , the first isolation structure 28′ in FIG. 8 includes at least one first bump 282 located on the surface of the interlayer insulating layer 233 away from the extensible base 1. The first electrode layer 244 covers the top of the at least one first bump 282 and the surface of the interlayer insulating layer 233. The first electrode layer 244 located on the top of the at least one first bump 282 and the first electrode layer 244 located on the surface of the interlayer insulating layer 233 are separated from each other. Referring to FIG. 8 , the at least one first bump has a protrusion width w4 of approximately 3 to 10 μm and a protrusion height h4 of approximately 400 to 800 nm. The protrusion width w4 here refers to the dimension of each first bump 282 along a second direction perpendicular to the first opening 11, and the protrusion height h4 refers to the dimension of each first bump 282 along a third direction perpendicular to the extensible base 1. The material of the first bump 282 may be a three-layer structure of Ti-Al-Ti.

[0111] 8 , in some embodiments, at least one of the plurality of interconnect units 3 includes a gate insulating layer 32, at least one second bump 362, and a third electrode layer 333. The gate insulating layer 32 is located on the front side of the extensible base 1 along the light-emitting direction of the display substrate, i.e., on the side of the extensible base 1 that is closer to the cover plate B. The at least one second bump 362 is located on the surface of the gate insulating layer 32 that is farther from the extensible base 1.

[0112] 8 , at least one of the plurality of wiring units 3 may further include a second buffer layer 31, a first conductive wiring 371, a second conductive wiring 372, a second planarization layer 331, and a pixel defining layer 332. The second buffer layer 31 is located on a surface of the extensible base 1. The first conductive wiring 371 is located on a surface of the second buffer layer 31 that is farther from the extensible base 1. The third gate insulating layer 32 is located on a side of the second buffer layer 31 that is farther from the extensible base 1 and covers the first conductive wiring 371. The second conductive wiring 372 is located on a surface of the third gate insulating layer 32 that is farther from the extensible base 1.

[0113] The second planarization layer 331 is located on the side of the second conductive line 372 that is farther from the extensible base 1 and covers the second conductive line 372. The pixel-defining layer 332 is located on the side of the second planarization layer 331 that is farther from the extensible base 1 and covers part of the surface of the second planarization layer 331.

[0114] At least one second bump 362 may be provided adjacent to the first opening 11. The third electrode layer 333 covers the top of the at least one second bump 362 and a portion of the surface of the third gate insulating layer 32 that is not covered by the third gate insulating layer 32. The third electrode layer 333 covering the top of the at least one second bump 362 and the third electrode layer 333 covering the surface of the third gate insulating layer 32 are separated from each other. This separates the third electrode layer 333 located in the bridge area from the third electrode layer 333 corresponding to the first opening 11, preventing the film layer corresponding to the first opening from communicating with the film layer corresponding to the island area via the film layer corresponding to the bridge area.

[0115] In some embodiments, the corresponding film layers provided in the island area and the bridge area may be located in the same layer and made of the same material. For example, the second buffer layer 31 and the first buffer layer 21 are located in the same layer and made of the same material. The first conductive wiring 371 and a portion of the source and drain of the thin film transistor 22 (e.g., the first source 223 and the first drain 224) are located in the same layer and made of the same material, so that the second conductive wiring 372 and a portion of the source and drain of the thin film transistor 22 (e.g., the second source 225 and the second drain 226) are located in the same layer and made of the same material, the second planarization layer 331 and the first planarization layer 241 are located in the same layer and made of the same material, and the third electrode layer 333 and the first electrode layer 244 are located in the same layer and made of the same material.

[0116] 9 and 10 , in some embodiments, the number of the at least one second bump 362 is the same as the number of the first bumps 282 among the at least one first bump 282, and the second bumps 362 are connected to each other and formed in a closed ring shape surrounding the first opening 11. The second bump 362 and the first bump 282 may be formed in the same patterning process.

[0117] Referring to Figures 6 and 7, in some embodiments, in the bridge area, the thin film sealing structure on the side farther from the extensible base in the multiple wiring units 3 may include a first inorganic side sealing layer, a second inorganic sealing layer 253 and a second organic sealing layer 254 stacked in sequence on the side farther from the extensible base in the multiple wiring units 3, and the thin film sealing structure in the bridge area and the thin film sealing structure in the island area have the same structure of each film layer, and the surfaces of the second organic sealing layer 254 in the bridge area and the island area farther from the extensible base are flush with each other.

[0118] If the product reliability requirements are met, no other film layer needs to be provided between the second organic sealing layer 254 and the cover plate B to allow the display substrate and the cover plate to be flexibly bonded at the position corresponding to the bridge area.

[0119] The second organic sealing layer 254 may be formed by first coating an organic material on the second inorganic sealing layer 253, and then performing a patterning process such as exposure and development to remove the organic material at the first opening positions to obtain the second organic sealing layer 254. The organic material for the second organic sealing layer 254 may be 1-methoxy-2-propyl acetate, acrylic resin, or the like.

[0120] In some embodiments, to simplify processing, the third electrode layer 333 and the first electrode layer 244 are located in the same layer and are the same material.

[0121] In addition, the surface of the second organic encapsulation layer 254 in the bridge area facing away from the stretchable base further includes an organic encapsulation layer pattern, the organic encapsulation layer pattern including at least one second aperture, the length direction of which is parallel to the length direction of the adjacent first aperture 11. In some embodiments, the organic encapsulation layer pattern includes a plurality of second apertures parallel to each other. The second apertures of the coating layer pattern may be formed by an exposure-development process. The second apertures in the second organic encapsulation layer 254 in the bridge area can effectively improve the stretchability of the bridge area.

[0122] The display panel embodiments of the present disclosure are applicable to various display devices. Accordingly, the present disclosure further provides a display device including the above-described display panel. The display device may be any product or component having a display function, such as a mobile phone, a tablet PC, a television, a display, a notebook PC, a digital photo frame, or a navigation system.

[0123] 13 to 16 are schematic diagrams illustrating some steps in a flow of an embodiment of a method for manufacturing a display panel according to the present disclosure. The embodiment of the display substrate can be manufactured with reference to the embodiment of the manufacturing method shown in FIGS.

[0124] 13 to 16, in some embodiments, a method for manufacturing a display substrate includes: Step S01 of preparing a base; a display area including a first display area A13 including a plurality of display units provided on a base and a first thin film encapsulating structure provided on the light-emitting side of the plurality of display units; a second display area A14 including a plurality of display units provided on the base and a second thin film encapsulating structure provided on the light-emitting side of the plurality of display units; and a transition display area A15 including a plurality of display units provided on the base and a third thin film encapsulating structure provided on the light-emitting side of the plurality of display units, and located between the first display area A13 and the second display area A14, wherein the first thin film encapsulating structure is formed by a first inorganic encapsulating layer 251, a first organic encapsulating layer 252, and a second inorganic encapsulating layer 253 sequentially stacked on the light-emitting side of the plurality of display units. and step S02 of forming a display area on the base, the display area including: the second thin film encapsulating structure including a first inorganic encapsulating layer 251, a second inorganic encapsulating layer 253, and a second organic encapsulating layer 254 sequentially stacked on the light-emitting sides of the plurality of display units; the third thin film encapsulating structure including a first portion 250A located closer to the first display area A13 and a second portion 250B located closer to the second display area A14; the first portion 250A including the first inorganic encapsulating layer 251, the first organic encapsulating layer 252, and the second inorganic encapsulating layer 253 sequentially stacked on the light-emitting sides of the plurality of display units; and the second portion 250B including the first inorganic encapsulating layer 251, the second inorganic encapsulating layer 253, and the second organic encapsulating layer 254 sequentially stacked on the light-emitting sides of the plurality of display units.

[0125] Step S02 specifically includes the following steps S021 to S026.

[0126] Step S021 is to form a first barrier 271 and a second barrier 272 on the light-emitting side of the plurality of display units in the display area; Specifically, a first groove and a second groove may be formed as a first barrier 271 and a second barrier 272 on the organic insulating layer or the first planarization layer 241 by an exposure and development process.

[0127] Step S022 is to form a first inorganic sealing layer 251 on the light-emitting side of the plurality of display units in the display area; Specifically, first inorganic encapsulation layer 251 may be formed using plasma-enhanced chemical vapor deposition.

[0128] Step S023 is to print a first organic material on the first inorganic sealing layer 251 to form a first organic material layer, a part of which is located in the first display area A13 and another part of which extends to cover the first barrier 271 and / or the second barrier 272; Specifically, as shown in FIG. 13, an organic material may be printed to form a first organic material layer, and the organic material has fluidity and a long climbing distance, so that it extends to a position where it covers the first barrier 271 but does not cover the second barrier 272, or extends to a position where it covers the second barrier 272.

[0129] Step S024 is to perform a thinning process on the first organic material layer, thereby partially removing the first organic material layer to form a first organic sealing layer 252, so that the first inorganic sealing layer 251 in the transition display area A15 is at least partially exposed; Specifically, as shown in FIG. 14, a plasma thinning process is used to thin the first organic material layer to a thickness of about several hundred angstroms, thereby removing the thin organic material on the transition display area A15 and exposing the first inorganic sealing layer 251 in the transition display area A15, thereby obtaining a display substrate as shown in FIG. 15.

[0130] Step S025 is to form a second inorganic sealing layer 253 that partially covers the first organic sealing layer 252 and partially covers a portion of the first inorganic sealing layer 251 that is not covered by the first organic sealing layer 252; Specifically, second inorganic encapsulation layer 253 may be formed using plasma-enhanced chemical vapor deposition.

[0131] In step S026, as shown in FIG. 16 , a second organic sealing layer 254 is applied onto the second inorganic sealing layer 253 so that a part of the second organic sealing layer 254 covers a part of the second inorganic sealing layer 253 that covers the first organic sealing layer 252, and another part of the second organic sealing layer 254 covers a part of the first inorganic sealing layer 251 that is not covered by the first organic sealing layer 252; Specifically, the second organic sealing layer 254 may be formed by coating.

[0132] The embodiments in this specification are described in an incremental manner, with different emphasis in each embodiment, and reference may be made to each other for the same or similar parts of each embodiment. The method embodiments are described briefly because the entire method and its steps correspond to the contents of the display panel embodiments, and reference may be made to the description of the display panel embodiments for the relevant parts.

[0133] Up to now, each embodiment of the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, details well known in the art are not described. Those skilled in the art will be able to fully understand how to implement the technical solutions disclosed in this specification based on the above description.

[0134] Although some specific embodiments of the present disclosure have been described in detail by way of example, those skilled in the art should understand that the above examples are merely for illustrative purposes and do not limit the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be substituted with equivalents without departing from the concept and spirit of the present disclosure. The scope of the present disclosure is limited by the appended claims.

Claims

1. A display substrate including a display area, the display area including: a first display area including a plurality of display units provided on a base and a first thin film encapsulating structure provided on a light-emitting side of the plurality of display units; a second display area including the plurality of display units provided on a base and a second thin film encapsulating structure provided on a light-emitting side of the plurality of display units; The display device includes a plurality of display units disposed on a base, and a third thin film encapsulation structure disposed on a light-emitting side of the plurality of display units, and a transition display area located between the first display area and the second display area; the first thin film encapsulating structure includes a first inorganic encapsulating layer, a first organic encapsulating layer, and a second inorganic encapsulating layer stacked in sequence on the light-emitting side of the plurality of display units, but does not include a second organic encapsulating layer; the second thin film encapsulating structure includes the first inorganic encapsulating layer, the second inorganic encapsulating layer, and the second organic encapsulating layer, which are sequentially stacked on the light-emitting side of the plurality of display units, but does not include the first organic encapsulating layer; a display substrate characterized in that the third thin film sealing structure includes a first portion located closer to the first display area and a second portion located closer to the second display area, the first portion including the first inorganic sealing layer, the first organic sealing layer, the second inorganic sealing layer, and the second organic sealing layer stacked in sequence on the light-emitting side of the plurality of display units, and the second portion including the first inorganic sealing layer, the second inorganic sealing layer, and the second organic sealing layer stacked in sequence on the light-emitting side of the plurality of display units, but not including the first organic sealing layer.

2. The display substrate according to claim 1 , wherein the second organic sealing layer has a light transmittance greater than that of the first organic sealing layer.

3. The display area is 2. The display substrate according to claim 1, comprising a plurality of side edges, adjacent side edges intersecting to form a plurality of corners, and the second display area is located in at least one of the plurality of corners.

4. 2. The display substrate according to claim 1, wherein a first barrier is provided between the first display area and the transition display area, and a second barrier is provided between the second display area and the transition display area.

5. 2. The display substrate of claim 1, wherein a first barrier and a second barrier are provided in the transition display area, the first barrier and the second barrier do not overlap with the display unit of the transition display area in orthogonal projection on the base, and the first barrier is provided on a side of the transition display area closer to the first display area, and the second barrier is provided on a side of the transition display area closer to the second display area.

6. The first inorganic sealing layer, the first organic sealing layer, and the second inorganic sealing layer of the first portion are formed by extending the first thin film sealing structure to a side where the transition display area is located, and the first inorganic sealing layer, the first organic sealing layer, and the second inorganic sealing layer of the first portion cover the first barrier; the second portion is formed by extending the second thin film sealing structure toward the transition display area, and the second portion covers the second barrier; The display substrate according to claim 4 or 5, characterized in that the second organic sealing layer in the first portion is formed by extending the second organic sealing layer in the second portion toward the side where the transition display area is located.

7. the first organic sealing layer of the first portion has an inclined surface on a side closer to the second display area, and the second organic sealing layer of the first portion covers a side of the inclined surface farther from the base; The display substrate according to claim 4 or 5, wherein the second organic sealing layer in the second thin film sealing structure and the second organic sealing layer in the third thin film sealing structure have surfaces that are approximately flush with each other on the side away from the base.

8. 2. The display substrate of claim 1, wherein the first display area has a first pixel density, the second display area has a second pixel density, and the transition display area has a third pixel density, and the second pixel density and the third pixel density are all less than or equal to the first pixel density.

9. The second display area is an extensible base, wherein a plurality of aperture patterns are distributed along a surface of the extensible base, each of the plurality of aperture patterns includes a plurality of first apertures, and a plurality of bridge areas surrounding island areas are formed between at least some adjacent first apertures among the plurality of first apertures, and a plurality of second display units are provided on the island areas formed in each aperture pattern; a plurality of wiring units respectively connected between the plurality of display units on the island area and provided in the plurality of bridge areas, At least one of the plurality of display units a first planarization layer positioned in front of the base along the light-emitting direction of the display substrate; an organic insulating layer located on the first planarization layer farther from the base; a first electrode layer located on the first planarization layer farther from the base, the first barrier includes a first groove, the first groove being disposed on the first planarization layer, and the organic insulating layer covering the first groove in a conformal manner; or the first groove being disposed on the organic insulating layer; the second barrier includes a second groove, the second groove being disposed on the first planarization layer, and the organic insulating layer covering the second groove in accordance with the shape of the second groove; or the second groove being disposed on the organic insulating layer; the first inorganic sealing layer is located on a side of the first electrode layer farther from the base and covers the first electrode layer; the first organic sealing layer covers a portion of the first inorganic sealing layer that is located farther from the second groove, the first groove, and a portion between the first groove and the second groove that is closer to the first groove, but does not cover a portion of the first inorganic sealing layer that is located near the second groove between the first groove and the second groove, the second groove, or a portion of the second groove that is farther from the first groove, the second inorganic sealing layer covers the first organic sealing layer and a portion of the first inorganic sealing layer that is not covered by the first organic sealing layer; The display substrate described in claim 4 or 5, characterized in that the second organic sealing layer covers a portion of the second inorganic sealing layer located in the first groove and a portion of the first groove located farther from the first display area, but does not cover the first opening.

10. 10. The display substrate of claim 9, wherein the organic insulating layer includes a first post spacer provided in the first display area, a second post spacer provided in the transition display area, and a third post spacer provided in the second display area, the first groove being provided on the first post spacer, and the second groove being provided on the second post spacer.

11. the first groove and the second groove comprise a continuous groove extending along a first direction, the first direction being a direction along which a boundary between the first display area and the transition display area extends; the continuous groove has a groove width of 5-15 μm in a second direction and a groove height of 1-2.5 μm in a third direction; the second direction is perpendicular to the first direction and parallel to the extensible base; and the third direction is perpendicular to the extensible base; or the first groove and / or the second groove comprise at least one row of discrete grooves sequentially arranged in a second direction, the second direction being perpendicular to the first direction and parallel to the extensible base, and each row of discrete grooves comprises a plurality of discrete grooves spaced apart from one another along the first direction; 11. The display substrate of claim 10, wherein the at least one row of discrete grooves includes a plurality of rows of discrete grooves, and the interval between adjacent rows of the discrete grooves in the plurality of rows is 2 to 15 μm.

12. At least one of the plurality of display units The first isolation structure is located between the second groove and the first opening, and is arranged to separate the first electrode layers on both sides of the first isolation structure.

11. The display substrate of claim 10, wherein the first electrode layer covers the first isolation structure and is located on a side of the first isolation structure adjacent to the second groove and a side of the first isolation structure adjacent to the first opening.

13. At least one of the plurality of display units in the second display area is a first passivation layer, a portion of which is located between the third post spacer and the first opening in the second display area, and at least a portion of which is located on a side of the first planarization layer away from the extensible base; the first isolation structure includes at least one third groove located in the first passivation layer and the first planarization layer, and a first electrode layer covered by a bottom of the at least one third groove and a first electrode layer covering a surface of the first passivation layer are separated from each other; At least one of the plurality of display units in the second display area is a second passivation layer at least partially located on a side of the first planarization layer proximate to the extensible base; 13. The display substrate of claim 12, wherein the first passivation layer includes a first passivation portion located on a side of the first planarization layer farther from the extensible base and a second passivation portion located on a side of the first planarization layer adjacent to the first opening, and the second passivation portion covers the surface of the first planarization layer adjacent to the first opening and is connected to the surface of the second passivation layer, so that the first passivation layer provides isolation protection for the surface of the first planarization layer adjacent to the first opening.

14. At least one of the plurality of display units in the second display area is further comprising an interlayer insulating layer positioned on the front side of the extensible base along the light-emitting direction of the display substrate; the first isolation structure includes at least one first bump located on a surface of the interlayer insulating layer farther from the extensible base, the first electrode layer covering a top of the at least one first bump and a part of a surface of the interlayer insulating layer, the first electrode layer located on the top of the at least one first bump and the first electrode layer located on the surface of the interlayer insulating layer being separated from each other; At least one of the plurality of wiring units is a second planarization layer located in front of the extensible base along the light-emitting direction of the display substrate; and a pixel-defining layer located on the second planarization layer farther from the extensible base, covering a portion of the surface of the second planarization layer and having at least one fourth groove; a third electrode layer covered by a bottom of the at least one fourth groove and covering a surface of the pixel defining layer; the third electrode layer covered by the bottom of the at least one fourth groove and the third electrode layer covered by the surface of the pixel defining layer are separated from each other; the number of the at least one third groove is the same as the number of the at least one fourth groove, and the at least one fourth groove and the at least one third groove are connected to each other and formed in a closed ring shape surrounding the first opening; At least one of the plurality of wiring units a gate insulating layer disposed on a front side of the extensible base along a light-emitting direction of the display substrate; and at least one second bump disposed on a surface of the gate insulating layer farther from the extensible base; a third electrode layer covering a top portion of the at least one second bump and a portion of the surface of the gate insulating layer that is not covered by the at least one second bump; the third electrode layer covering the top of the at least one second bump and the third electrode layer covering the surface of the gate insulating layer are separated from each other, 14. The display substrate of claim 13, wherein the number of second bumps among the at least one second bump is the same as the number of first bumps among the at least one first bump, and the at least one second bump and the at least one first bump are respectively connected to each other and formed in a closed ring shape surrounding the first opening.

15. the first apertures include an opening end located farther from the base, a bottom end located closer to the base, and a hole portion located between the opening end and the bottom end, and the opening width of at least one of the plurality of first apertures is such that the opening width of the hole portion gradually increases along the light output direction of the display substrate, the opening width of the opening end is smaller than the maximum opening width of the hole portion, and the maximum opening width of the hole portion is larger than the opening width of the bottom end; 10. The display substrate according to claim 9, wherein at least a portion of the side wall of the hole portion near the opening end has an arc-shaped curved surface.

Images