Display panel

Abstract

The invention discloses a display panel. The display panel comprises a first substrate and a second substrate. The first substrate comprises a first substrate body which is provided with a first area located in the middle and a second area located on the periphery of the first area. The second area is provided with at least two annular first alignment protrusions. A first alignment groove is formed between every two adjacent first alignment bulges; the second substrate comprises a second substrate body which is provided with a third area located in the middle and a fourth area located on the periphery of the first area; the fourth area is provided with a plurality of annular second alignment protrusions. And each second alignment bulge is butted with the corresponding first alignment bulge at one corresponding first alignment groove. According to the display panel, the first alignment protrusion is arranged on the first substrate, the second alignment protrusion is arranged on the second substrate, the second alignment protrusion and the first alignment protrusion are in butt joint, the attaching precision of the first substrate and the second substrate is improved, and the display effect of the display panel is improved.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel. Background Technology

[0002] With the development of display technology, the requirements for display performance of display panels (such as micro organic light-emitting diode display panels, i.e., Micro OLED display panels) are becoming increasingly stringent. Generally, Micro OLED display panels are manufactured by bonding an array substrate to a color filter substrate (or glass substrate). The precision of the bonding process between the array substrate and the color filter substrate (or glass substrate) directly affects the display panel's performance. Summary of the Invention

[0003] The purpose of this application is to provide a display panel that improves alignment accuracy.

[0004] This application discloses a display panel, which includes: A first substrate includes a first substrate body, the first substrate body having a first region located in the middle and a second region located around the first region; the second region is provided with at least two annular first alignment protrusions; a first alignment groove is formed between each two adjacent first alignment protrusions. The second substrate includes a second substrate body, the second substrate body having a third region located in the middle and a fourth region located around the first region; the fourth region is provided with a plurality of annular second alignment protrusions; wherein each second alignment protrusion mates with the first alignment protrusion at a corresponding first alignment groove.

[0005] In some embodiments, there are multiple second alignment protrusions, and a second alignment groove is formed between every two adjacent second alignment protrusions. Each second alignment groove corresponds to and engages with a first alignment protrusion.

[0006] In some embodiments, both the first alignment protrusion and the second alignment protrusion are continuous rings; or, At least one of the first alignment protrusion and the second alignment protrusion is a non-continuous ring.

[0007] In some embodiments, the cross-sectional width of the first alignment protrusion gradually decreases in the direction from the first substrate body toward the direction away from the first substrate body. The cross-sectional width of the second alignment protrusion gradually decreases from the direction close to the first substrate body toward the direction away from the first substrate body.

[0008] In some embodiments, the cross-sections of the first alignment protrusion and the second alignment protrusion are triangular or trapezoidal.

[0009] The height of the first alignment protrusion is greater than or equal to half the distance between the first substrate body and the second substrate body, and less than or equal to the distance between the first substrate body and the second substrate body. The height of the second alignment protrusion is greater than or equal to half the distance between the first substrate body and the second substrate body, and less than or equal to the distance between the first substrate body and the second substrate body.

[0010] In some embodiments, the alignment accuracy of the first substrate and the second substrate is less than the fabrication accuracy of the first alignment protrusion and the second alignment protrusion. times.

[0011] In some embodiments, the fabrication precision of the first alignment protrusion and the second alignment protrusion is less than or equal to 70 nm; the alignment precision of the first substrate and the second substrate is less than... 70nm.

[0012] In some embodiments, the alignment span of the first alignment protrusion and the second alignment protrusion is 200nm-1000nm in the direction from the first region toward the direction away from the first region; the alignment span is the sum of the width of the edge of the first alignment protrusion near the first substrate body and the spacing between two adjacent first alignment protrusions.

[0013] In some embodiments, one of the first substrate and the second substrate is an array substrate, and the other is a color filter substrate or a glass cover.

[0014] Compared with related technologies, the display panel disclosed in this application, by providing at least two first alignment protrusions on the first substrate and providing second alignment protrusions on the second substrate, forms a first alignment groove between each pair of adjacent first alignment protrusions; wherein, each second alignment protrusion mates with the first alignment protrusion at a corresponding first alignment groove, which is beneficial to improving the bonding accuracy of the first substrate and the second substrate, thereby improving the display effect of the display panel.

[0015] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0017] Figure 1 This is a cross-sectional view of a display panel provided in an exemplary embodiment of this application; Figure 2 This is a cross-sectional view of a first substrate provided in an exemplary embodiment of this application; Figure 3 This is a cross-sectional view of a second substrate provided in an exemplary embodiment of this application; Figure 4 These are group diagrams showing different cross-sectional shapes of the first alignment protrusion provided in an exemplary embodiment of this application; Figure 5 This is a top view of a first substrate provided in an exemplary embodiment of this application; Figure 6 This is a top view of another first substrate provided in an exemplary embodiment of this application; Figure 7 This is a top view of yet another first substrate provided in an exemplary embodiment of this application; Figure 8 and Figure 9 This is a schematic diagram of the structure corresponding to different assembly stages in the assembly process of a first substrate and a second substrate, provided by an exemplary embodiment of this application; Figure 10 This is a cross-sectional view of another display panel provided in an exemplary embodiment of this application. Detailed Implementation

[0018] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0019] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0020] Generally, Micro OLED display panels are bonded together with an array substrate and a color filter substrate (or glass substrate). The precision of this bonding directly affects the display panel's performance. Due to limitations in manufacturing processes, the alignment precision of the array substrate and color filter substrate (or glass substrate) during bonding can only reach 200-500nm. This limited alignment leads to issues such as color bleeding and large fluctuations in the CRA angle in Micro OLED products. When combined with an optomechanical system, this can result in color shifts, uneven image quality, or ghosting in the image entering the viewer's eye.

[0021] Based on this, this application provides a display panel. The display panel includes a first substrate and a second substrate. The first substrate includes a first substrate body, which has a first region located in the center and a second region located around the first region; the second region is provided with at least two annular first alignment protrusions; a first alignment groove is formed between each pair of adjacent first alignment protrusions. The second substrate includes a second substrate body, which has a third region located in the center and a fourth region located around the first region; the fourth region is provided with annular second alignment protrusions. Each second alignment protrusion mates with a first alignment protrusion at a corresponding first alignment groove.

[0022] The aforementioned display panel, by providing at least two first alignment protrusions on a first substrate and providing second alignment protrusions on a second substrate, wherein a first alignment groove is formed between each two adjacent first alignment protrusions; wherein each second alignment protrusion mates with a first alignment protrusion at a corresponding first alignment groove, which helps to improve the bonding accuracy of the first substrate and the second substrate, reduces the need for setting and eliminates the problem of poor display effect caused by low alignment accuracy, thereby improving the display effect of the display panel.

[0023] The following is in conjunction with the appendix Figures 1 to 10 The display panel of this application will be described in detail.

[0024] First, please refer to Figure 1 And combine when necessary Figures 2 to 9 As shown, the display panel 1000 includes a first substrate 100 and a second substrate 200.

[0025] The first substrate 100 includes a first substrate body 101. The first substrate body 101 has a first region S1 located in the center and a second region S2 located around the first region S1. The second region S2 is provided with at least two annular first alignment protrusions 17. A first alignment groove 1701 is formed between each pair of adjacent first alignment protrusions 17. The first alignment protrusions 17 are annular around the first region S1.

[0026] The first substrate body 101 includes a substrate 11 (such as a silicon substrate), a metal anode layer 12 disposed on the substrate 11, a light-emitting device layer 13 (i.e., an EL layer), a cathode layer 14, a thin-film encapsulation layer 15, and a planarization layer 16. The metal anode layer 12, the light-emitting device layer 13, and the cathode layer 14 are sequentially stacked on the substrate 11. The thin-film encapsulation layer 15 covers the side of the cathode layer 14 facing away from the substrate 11 and the sidewalls of the metal anode layer 12, the light-emitting device layer 13, and the cathode layer 14. A first alignment protrusion 17 is disposed on one side of the first substrate body 101. Figure 1 As shown, the first alignment protrusion 17 is located on the side of the planarization layer 16 facing away from the substrate 11. It should be noted that... Figure 1 The metal anode layer 12, light-emitting device layer 13 (i.e., EL layer), cathode layer 14, and thin film encapsulation layer 15 corresponding to only one light-emitting unit (i.e., one pixel) are shown as examples only.

[0027] The second substrate 200 includes a second substrate body 201. The second substrate body 201 has a third region S3 located in the center and a fourth region S4 located around the first region S1. The fourth region S4 is provided with an annular second alignment protrusion 27. The second alignment protrusion 27 is annular around the third region S3.

[0028] The second substrate body 201 may be a substrate 21 (such as a CG substrate). The second substrate 200 also includes a color filter resist layer 24 (resistive material layer), a color filter resist layer 23, a color filter resist layer 22, a planarization layer 25, and a lens 26 disposed on the substrate 21. The color filter resist layers 22, 23, and 24 are respectively one of a red, green, or blue resist layer. For example, the color filter resist layer 22 may be a blue resist layer, the color filter resist layer 23 a green resist layer, and the color filter resist layer 24 a red resist layer. It should be noted that... Figure 1 The diagram only shows the color blue light resist material layer, planarization layer, and lens corresponding to one light-emitting unit (i.e., one pixel).

[0029] Each second alignment protrusion 27 is engaged with the first alignment protrusion 17 at a corresponding first alignment groove 1701.

[0030] It should be noted that the first area S1 and the third area S3 are opposite each other and correspond to the display area of ​​the display panel 1000. The second area S2 and the fourth area S4 are opposite each other and correspond to the non-display area of ​​the display panel 1000.

[0031] In some embodiments, there are multiple second alignment protrusions 27, and a second alignment groove 2701 is formed between each two adjacent second alignment protrusions 27, and each second alignment groove 2701 corresponds to and engages with a first alignment protrusion 17.

[0032] In some embodiments, the number of the second alignment protrusions 27 differs from the number of the first alignment protrusions 17 by one, such that the fewer second alignment protrusions 27 can just match the first alignment grooves 1701 formed by the more first alignment protrusions 17.

[0033] for example Figure 1 The first alignment protrusion 17 shown has 3 pieces, and the second alignment protrusion 27 has 2 pieces.

[0034] It should be noted that the overall annular contour of the first alignment protrusion 17 can be approximately consistent with the outer contour of the first substrate body 101, for example... Figures 5 to 7 As shown, the outer contour of the first substrate body 101 is rectangular, and the first alignment protrusion 17 may be in the shape of a rectangular ring. The overall ring-shaped contour of the second alignment protrusion 27 is similar.

[0035] In some embodiments, at least one of the first alignment protrusion 17 and the second alignment protrusion 27 is a continuous ring.

[0036] Combination Figure 5 As shown, Figure 5 The diagram shows that the alignment protrusions are in a continuous ring shape.

[0037] The first and second protrusions 17 may both be continuous annular shapes. Alternatively, only one of them may be continuous annular shapes.

[0038] In some embodiments, the first alignment protrusion 17 and the second alignment protrusion 27 are both non-continuous annular.

[0039] like Figure 6 and Figure 7 As shown, Figure 6 and Figure 7 The exemplary illustration shows that the alignment protrusion is a non-continuous ring shape. In some embodiments, the non-continuous ring-shaped first alignment protrusion 17 may be provided at a corner, for example... Figure 6 As shown. In other embodiments, the non-continuous annular first alignment protrusion 17 may be positioned to avoid corners, i.e., it may be positioned on the inner side of each edge.

[0040] It should be noted that, Figures 5 to 7 An example is shown where there is a gap between adjacent first alignment protrusions 17. And for... Figure 1 The top view of the first alignment protrusion 17 shown shows that there is no gap between adjacent first alignment protrusions 17.

[0041] In some embodiments, the cross-sectional width of the first alignment protrusion 17 gradually decreases in the direction from the side near the first substrate 100 toward the side away from the first substrate 100.

[0042] In the direction from the side near the second substrate 200 toward the side away from the second substrate 200, the width of the cross section of the second alignment protrusion 27 gradually decreases.

[0043] Combination Figure 4 As shown, the cross-section of the first alignment protrusion 17 can be triangular or trapezoidal, for example... Figure 4 As shown in (a), (b), (c), and (d).

[0044] Combination Figure 5 As shown, the cross-section of the first alignment protrusion 17 can be along... Figure 5 The cross-section obtained by the AA section line shown. The AA section line is perpendicular to the annular extension direction of the first alignment protrusion 17.

[0045] In some embodiments, the alignment span of the first alignment protrusion and the second alignment protrusion is p in the direction from near the first region S1 toward away from the first region S1, and p can range from 200nm to 1000nm. The alignment span is the sum of the width of one first alignment protrusion 17 near the edge of the first substrate body 101 and the distance between two adjacent first alignment protrusions 17.

[0046] Combination Figure 1 As shown, when the cross-sectional shape of the first alignment protrusion 17 is triangular, the alignment span p of the first alignment protrusion 17 and the second alignment protrusion 27 is the sum of the width of the first alignment protrusion 17 near the edge of the first substrate body 101 and the distance between two adjacent first alignment protrusions 17. Since Figure 1 The adjacent first alignment protrusions 17 shown are arranged continuously, and the distance between two adjacent first alignment protrusions 17 is zero. Then, the alignment span p of the first alignment protrusion 17 and the second protrusion 27 is the width of the first alignment protrusion 17 near the edge of the first substrate body 101. This width is the width in the direction from near the first region S1 to away from the first region S1.

[0047] Combination Figure 10 As shown, when the cross-sectional shape of the first alignment protrusion 17 is trapezoidal, the alignment span p of the first alignment protrusion 17 and the second alignment protrusion 27 can be the sum of the width p1 of the first alignment protrusion 17 near the edge of the first substrate body 101 and the distance p2 between two adjacent first alignment protrusions 17.

[0048] Of course, the cross-section of the first alignment protrusion 17 can also be as follows: Figure 4 The tops shown in (e), (f), and (g) are triangular or trapezoidal in shape, neither pointed nor planar. Figure 4 The three-row or trapezoidal shapes shown in (e), (f), and (g) are easier to prepare.

[0049] The cross-sectional shape of the second alignment protrusion 27 can be triangular or trapezoidal. For example... Figure 4 As shown in (a), (b), (c), and (d).

[0050] Of course, the second alignment protrusion 27 can also be as follows: Figure 4 The tops shown in (e), (f), and (g) are triangular or trapezoidal in shape, neither pointed nor planar. Figure 4 The triangular or trapezoidal shapes shown in (e), (f), and (g) are easier to prepare.

[0051] The first alignment protrusion 17 and the second alignment protrusion 27 have the same cross-sectional shape, for example, both are as follows: Figure 1 The triangles shown, or all of them Figure 10 The trapezoidal shape shown is to facilitate the alignment of the first alignment protrusion 17 and the second alignment protrusion 27.

[0052] It should be noted that in some other embodiments, the cross-sectional shapes of the first alignment protrusion and the second alignment protrusion may be different. For example, the cross-sectional shape of the first alignment protrusion may be triangular, and the cross-sectional shape of the second alignment protrusion may be rectangular.

[0053] In some embodiments, the first substrate 100 is an array substrate, and the second substrate 200 is a color filter substrate.

[0054] Combination Figure 2As shown, during the fabrication of the first substrate 100, a metal anode layer 12, a light-emitting device layer 13, and a cathode layer 14 are sequentially formed on a substrate 11 containing driving circuits and array pixels. A thin-film encapsulation layer 15 is then formed on the cathode layer 14 to block water and oxygen. A planarization layer 16 is then formed. At this point, a color spectrum light source is obtained, and the above processes are identical to the Micro OLED fabrication process in related technologies. The metal anode layer 12 includes an anode electrode and a pixel definition layer. The anode electrode is divided into multiple spaced sub-pixels (not shown) by the pixel definition layer. The light-emitting device layer 13 includes a hole injection layer, a hole transport layer, an R / G / B light-emitting layer, an electron transport layer, and an electron injection layer. Based on the above fabrication, multiple annular first alignment protrusions 17 are formed on one side of the substrate body 101, and first alignment grooves 1701 are formed between adjacent first alignment protrusions 17. At this point, all processes of the first substrate 100 are completed. Among them, the alignment span p of the first alignment protrusion 17 and the second alignment protrusion 27 corresponding to the first alignment protrusion 17 can satisfy the condition: D < p < 2 D; where D is the alignment accuracy when two substrates are bonded together without alignment protrusions in the related technology. In the related technology, D is 200nm-500nm. Correspondingly, the alignment span of the first alignment protrusion and the second alignment protrusion is p, and the range of p can be 200nm-1000nm.

[0055] The first alignment protrusion 17 can be fabricated using an exposure and development process. In some embodiments, it can be fabricated by direct exposure using an exposure machine. For example, a material layer for forming the first alignment protrusion 17 can be directly coated on the first substrate body 101, and this material layer can be a photosensitive material. Then, an exposure machine is used to perform an exposure process to form the first alignment protrusion 17. Alternatively, the first alignment protrusion 17 can be fabricated using an exposure machine in conjunction with an etching process. For example, a material layer for forming the first alignment protrusion 17 can be first coated on the first substrate body 101, and this material layer can be a non-photosensitive material. Then, a mask material layer (photosensitive material layer) is coated on the surface of this material layer, and the mask material layer is exposed to form a patterned mask layer using an exposure machine. Then, the first alignment protrusion 17 is formed by etching, and the mask layer is removed. The exposure machine used in the fabrication of Micro OLED display panels has a precision of approximately 70nm or less. Therefore, the first alignment protrusion 17 has high precision, and the fabrication precision (i.e., overlay accuracy, OL) of the first alignment protrusion 17 is 70 nm or less.

[0056] Combination Figure 3As shown, during the fabrication of the second substrate 200, three color filter resist material layers—color filter resist material layer 24 (resist material layer), color filter resist material layer 23, and color filter resist material layer 22—can be fabricated on the substrate 21 (such as a CG substrate). Then, a planarization layer 25 is fabricated. Next, a lens 26 morphology capable of high-temperature curing is fabricated on the planarization layer 25. Since the second substrate 200 does not contain any heat-sensitive material layers (such as light-emitting device layers), the materials used for the color filter resist material layer 24 (resist material layer), color filter resist material layer 23, color filter resist material layer 22, and lens 26 can be selected as high-performance, stable, and low-cost high-temperature curable materials. Then, a second alignment protrusion 27, matching the first alignment protrusion 17 and the first alignment groove 1701 on the first substrate 100, is fabricated on one side of the second substrate body 201. At this point, all processes for the second substrate 200 are completed. The alignment span p of the second alignment protrusion 27 corresponding to the first alignment protrusion 17 and the second alignment protrusion 27 can satisfy the condition: D < p < 2. D; where D is the alignment accuracy when two substrates are bonded together without alignment protrusions in the related technology. In the related technology, D is 200nm-500nm. Correspondingly, the alignment span of the first alignment protrusion and the second alignment protrusion is p, and the range of p can be 200nm-1000nm.

[0057] The second alignment protrusion 27 can be fabricated using an exposure and development process. In some embodiments, it can be fabricated by direct exposure using an exposure machine. For example, a material layer for forming the second alignment protrusion 27 can be directly coated on the second substrate body 201, and this material layer can be a photosensitive material. Then, an exposure machine is used to perform an exposure process to form the second alignment protrusion 27. In other embodiments, the second alignment protrusion 27 can be fabricated using an exposure machine in conjunction with an etching process. For example, a material layer for forming the second alignment protrusion 27 can be first coated on the second substrate body 201, and this material layer can be a non-photosensitive material. Then, a mask material layer (photosensitive material layer) is coated on the surface of this material layer, and the mask material layer is exposed to form a patterned mask layer using an exposure machine. Then, the second alignment protrusion 27 is formed by etching, and the mask layer is removed. The exposure machine precision used in the fabrication of Micro OLED display panels is approximately 70nm or less. Therefore, the second alignment protrusion 27 has high precision, and the fabrication precision (i.e., overlay accuracy, OL) of the second alignment protrusion 27 is 70 nm or less.

[0058] In some embodiments, the alignment accuracy of the first substrate 100 and the second substrate 200 is less than the fabrication accuracy of the first alignment protrusion 17 and the second alignment protrusion 27. times.

[0059] The first alignment protrusion 17 and the second alignment protrusion 27 are manufactured using an exposure and development process, and their fabrication precision is less than or equal to 70 nm. Accordingly, in the display panel 1000, the alignment precision of the first substrate 100 and the second substrate 200 can reach less than [missing value]. 70nm.

[0060] Based on the above description, the first alignment protrusion 17 and the second alignment protrusion 27 are fabricated using an exposure and development process, which results in higher fabrication precision and is more conducive to improving the alignment accuracy of the bonding between the first substrate 100 and the second substrate 200. Of course, in some other embodiments, if the process conditions permit, the first alignment protrusion and the second alignment protrusion can also be fabricated using other fabrication processes.

[0061] Combination Figure 8 and Figure 9 As shown, when bonding the first substrate 100 and the second substrate 200, the first substrate 100 can be first adsorbed onto the bonding machine table, and the optical adhesive 300 required for bonding can be applied to it. Then, coarse and fine alignment are performed using the respective alignment marks (such as square, circular, ring, polygonal ring, etc. alignment marks, not shown) of the first substrate 100 and the second substrate 200. Due to the limited process capability of bonding equipment in related technologies, the alignment accuracy D of two substrates without alignment protrusions is generally 200nm~500nm, that is, the offset L of the two substrates to be bonded is ≤D. In this application, the alignment span p of the first alignment protrusion 17 and the second alignment protrusion 27 is set to the range of D<p<2. D (where D is the alignment accuracy of the upper and lower substrates), therefore, after alignment by the alignment mark, the first alignment protrusion 17 and the second alignment protrusion 27 are nested with the second alignment groove 2701 and the first alignment groove 1701 respectively, as shown. Figure 9 As shown, even if there is a slight deviation between the alignment protrusion and the corresponding alignment groove, when an external force is applied to the upper substrate for bonding, the second alignment protrusion 27 and the first alignment protrusion 17, under the action of the external force and the restriction of the first alignment groove 1701 and the second alignment groove 2701 respectively, can still allow the second substrate 200 to move left and right, so that the second alignment protrusion 27 and the first alignment protrusion 17 are respectively stuck by the corresponding first alignment groove 1701 and second alignment groove 2701, and then the final curing is performed to complete the final bonding, as shown. Figure 1 The display panel shown. Because the first alignment protrusion 17 and the second alignment protrusion 27 are fabricated using an exposure and development method, their fabrication precision (i.e., overlay accuracy, OL) is high, which can be 70nm or less. Thus, the final bonding precision of the first substrate 100 and the second substrate 200 is less than... It is far superior to the substrate alignment accuracy D (i.e., 200nm~500nm) of the bonding equipment itself in related technologies.

[0062] In some other embodiments, the second substrate 200 may also be a glass cover. Alternatively, the second substrate may be an array substrate, and the first substrate may be a color filter substrate or a glass cover.

[0063] It should be noted that the materials of the first alignment protrusion 17 and the second alignment protrusion 27 can be color resist film materials (i.e., the materials used in any color filter color resist material layer, such as red (R) filter color resist material, green (G) filter color resist material, or blue (B) filter color resist material), light-shielding black BM material, transparent optical adhesive material, or other materials with good water-blocking properties. If color resist film materials or light-shielding black BM materials, which have certain light-shielding properties, are used, the alignment protrusions can also absorb ambient light, reduce strong light reflection, and further improve the display effect. It should also be noted that the setting of the first alignment protrusion 17 and the second alignment protrusion 27 can also extend the water vapor transmission path, avoid film layer separation, and further improve product quality.

[0064] It should also be noted that in the aforementioned display panels 1000 and 2000, the tops of both the first alignment protrusion 17 and the second alignment protrusion 27 contact the opposing substrate body. In some other embodiments, one of the tops of the first alignment protrusion and the second alignment protrusion 27 may contact the opposing substrate, or neither of their tops may contact the opposing substrate.

[0065] Accordingly, in order to ensure alignment accuracy, the height h1 of the first alignment protrusion 17 is greater than or equal to half of the distance G0 between the first substrate body 101 and the second substrate body 201, and less than or equal to the distance G0 between the first substrate body 101 and the second substrate body 201.

[0066] The height h2 of the second alignment protrusion 27 is greater than or equal to half of the distance G0 between the first substrate body 101 and the second substrate body 201, and less than or equal to the distance G0 between the first substrate body 101 and the second substrate body 201.

[0067] like Figure 10 As shown, this application also provides a display panel 2000. The structure of this display panel 2000 is substantially the same as that of the display panel 1000 described above; similarities or resemblances can be found in the aforementioned description. The difference lies in that the cross-sections of the first alignment protrusion 17 and the second alignment protrusion 27 in the display panel 1000 are both triangular. The cross-sections of the first alignment protrusion 17 and the second alignment protrusion 27 in this display panel 2000 are both trapezoidal.

[0068] This application also discloses a display substrate, which includes a substrate body. The substrate body has a display area located in the center and a non-display area located around the display area; the non-display area is provided with one or more annular alignment protrusions; when there are multiple alignment protrusions, an alignment groove is formed between every two adjacent alignment protrusions.

[0069] In some embodiments, the alignment protrusion is in the form of a continuous ring or a non-continuous ring.

[0070] In some embodiments, the cross-section of the alignment protrusion is triangular or trapezoidal.

[0071] The display substrate can be either the first substrate 100 or the second substrate 200 as described above. When the display substrate is the first substrate 100, the display area corresponds to the first area S1, and the non-display area corresponds to the second display area S2. The alignment protrusion is the first alignment protrusion 17, and the alignment groove is the first alignment groove 1701. When the display substrate is the second substrate 200, the display area is the third area S3, and the non-display area corresponds to the fourth display area S4. The alignment protrusion is the second alignment protrusion 27, and the alignment groove is the second alignment groove 2701. Other structures of the display substrate can be referred to the corresponding descriptions above, and will not be repeated here.

[0072] This application also discloses a display device, which includes the above-described display panel 1000 or 2000 or a similar display panel.

[0073] The display device may be a wearable display device.

[0074] In one embodiment, the display device further includes a housing, and the display panel is disposed on the housing.

[0075] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A display panel, characterized in that, include: The first substrate includes a first substrate body, the first substrate body having a first region located in the middle and a second region located around the first region; The second region is provided with at least two annular first alignment protrusions; a first alignment groove is formed between each two adjacent first alignment protrusions; The second substrate includes a second substrate body, the second substrate body having a third region located in the middle and a fourth region located around the first region; the fourth region is provided with a plurality of annular second alignment protrusions; wherein each second alignment protrusion mates with the first alignment protrusion at a corresponding first alignment groove.

2. The display panel as described in claim 1, characterized in that, There are multiple second alignment protrusions, and a second alignment groove is formed between every two adjacent second alignment protrusions. Each second alignment groove corresponds to and engages with a first alignment protrusion.

3. The display panel as described in claim 1, characterized in that, Both the first and second alignment protrusions are continuous rings; or, At least one of the first alignment protrusion and the second alignment protrusion is a non-continuous ring.

4. The display panel as described in claim 1, characterized in that, The cross-sectional width of the first alignment protrusion gradually decreases from the direction close to the first substrate body toward the direction away from the first substrate body; The cross-sectional width of the second alignment protrusion gradually decreases from the direction close to the first substrate body toward the direction away from the first substrate body.

5. The display panel as described in claim 4, characterized in that, The cross-sections of the first and second alignment protrusions are triangular or trapezoidal.

6. The display panel as described in claim 1, characterized in that, The height of the first alignment protrusion is greater than or equal to half the distance between the first substrate body and the second substrate body, and less than or equal to the distance between the first substrate body and the second substrate body. The height of the second alignment protrusion is greater than or equal to half the distance between the first substrate body and the second substrate body, and less than or equal to the distance between the first substrate body and the second substrate body.

7. The display panel as described in claim 1, characterized in that, The alignment accuracy of the first substrate and the second substrate is less than the fabrication accuracy of the first alignment protrusion and the second alignment protrusion. times.

8. The display panel as described in claim 1, characterized in that, The fabrication precision of the first alignment bump and the second alignment bump is less than or equal to 70 nm; the alignment precision of the first substrate and the second substrate is less than 70nm.

9. The display panel as claimed in claim 1, characterized in that, From the direction of approaching the first region toward the direction of away from the first region, the alignment span of the first alignment protrusion and the second alignment protrusion is 200nm-1000nm; the alignment span is the sum of the width of the edge of the first alignment protrusion near the first substrate body and the distance between two adjacent first alignment protrusions.

10. The display panel as claimed in claim 1, characterized in that, One of the first substrate and the second substrate is an array substrate, and the other is a color filter substrate or a glass cover plate.

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