Display panel and display device

Abstract

The utility model discloses a display panel and a display device, and the display panel comprises a flexible display substrate which is provided with a display surface and a non-display surface which are oppositely arranged; the supporting structure is connected with the non-display surface, and a light through hole is formed in the supporting structure; at least part of the light-transmitting structure is located in the light-transmitting hole; wherein one of the light-transmitting structure and the supporting structure comprises a limiting part, the other one of the light-transmitting structure and the supporting structure comprises a limiting groove matched with the limiting part, the limiting groove is provided with a first face and a second face which are oppositely arranged in the thickness direction of the display panel, and at least part of the limiting part is located in the limiting groove. The first surface and the second surface are attached to each other.

Description

Technical Field

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

[0002] The foldable display device includes a stacked flexible cover plate, a flexible display substrate, and a support layer, wherein the support layer is used to support the flexible display substrate to prevent the flexible display substrate from being damaged due to uneven force during the folding process. At the location of the photosensitive element or other functional holes, holes need to be dug in the support layer, which inevitably weakens the structural strength and support capacity of the area. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art, and proposes a display panel and a display device.

[0004] In order to achieve the above object, the present disclosure provides a display panel, comprising:

[0005] A flexible display substrate, wherein the flexible display substrate has a display surface and a non-display surface that are arranged opposite to each other;

[0006] A supporting structure, the supporting structure is connected to the non-display surface and is provided with a light-through hole;

[0007] a light-transmitting structure, at least a portion of which is located in the light-through hole;

[0008] Among them, one of the light-transmitting structure and the supporting structure includes a limiting portion, and the other includes a limiting groove matching the limiting portion, the limiting groove has a first surface and a second surface arranged opposite to each other along the thickness direction of the display panel, and at least a part of the limiting portion is located in the limiting groove and is in contact with the first surface and the second surface.

[0009] In some embodiments, the support structure includes: a first support layer and a second support layer, the first support layer is connected to the non-display surface; the second support layer is located on a side of the first support layer away from the first support layer; the light-through hole includes a first hole portion penetrating the first support layer and a second hole portion penetrating the second support layer;

[0010] The light-transmitting structure includes the limiting groove, the second supporting layer includes the limiting portion and a connecting portion connected to the limiting portion, the limiting portion surrounds the second hole portion, and the connecting portion surrounds the limiting portion and is connected to the first supporting layer.

[0011] In some embodiments, the connecting portion is bonded to the first supporting layer through a first bonding layer.

[0012] In some embodiments, the limiting portion and the connecting portion have the same thickness.

[0013] In some embodiments, the first supporting layer and the second supporting layer are both metal layers.

[0014] In some embodiments, there is a gap between the light-transmitting structure and a sidewall of the first hole portion.

[0015] In some embodiments, the light-transmitting structure includes the limiting groove;

[0016] The supporting structure includes a first supporting layer having the light-through hole, the first supporting layer includes the limiting portion and a supporting portion connected to the limiting portion, the limiting portion surrounds the light-through hole, the supporting portion surrounds the limiting portion, the supporting portion is connected to the non-display surface, and the thickness of the limiting portion is less than or equal to the thickness of the supporting portion.

[0017] In some embodiments, the light-transmitting structure includes: a main body, and a first skirt portion and a second skirt portion disposed on a side wall of the main body, wherein at least a portion of the main body is located in the light-through hole; the first skirt portion and the second skirt portion are disposed opposite to each other in a thickness direction of the display panel, and define the limiting groove with the main body;

[0018] The total thickness of the first skirt portion, the second skirt portion and the limiting portion is less than or equal to the thickness of the supporting portion.

[0019] In some embodiments, the support structure includes a first support layer having the limiting groove and the light-through hole, and the limiting groove is located on the side wall of the light-through hole;

[0020] The light-transmitting structure includes: a main body and a limiting portion connected to a side wall of the main body, wherein the limiting portion is arranged around the main body.

[0021] In some embodiments, the maximum distance between the surface of the light-transmitting structure away from the display substrate and the non-display surface is a first distance, the maximum distance between the surface of the supporting portion away from the display substrate and the non-display surface is a second distance, and the first distance is less than or equal to the second distance.

[0022] In some embodiments, the limiting groove further has a third surface connecting the first surface and the second surface, and the limiting portion is in contact with the third surface.

[0023] In some embodiments, a second adhesive layer is disposed between the support structure and the non-display surface, and a first distance exists between a surface of the light-transmitting structure facing the display substrate and the non-display surface, and the first distance is smaller than a thickness of the second adhesive layer.

[0024] In some embodiments, the display panel further comprises:

[0025] A flexible cover plate, located on a side of the flexible display substrate away from the supporting structure;

[0026] The third adhesive layer is bonded between the flexible display substrate and the flexible cover plate.

[0027] The present disclosure also provides a display device, comprising the above-mentioned display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0029] Figure 1 It is a front schematic diagram of a foldable display device provided in some embodiments.

[0030] Figure 2 It is a schematic diagram of the back side of the foldable display device provided in some embodiments.

[0031] Figure 3 For along Figure 2 Sectional view along line A-A'.

[0032] Figure 4 is a cross-sectional view of a display panel provided in some other embodiments.

[0033] Figure 5A It is a cross-sectional view of a display panel and a light-transmitting structure provided in some embodiments of the present disclosure.

[0034] Figure 5B This is a schematic diagram of microstructures provided on the limiting portion and in the limiting groove in some embodiments of the present disclosure.

[0035] Figure 6 sectional views of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure.

[0036] Figure 7 sectional views of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure.

[0037] Figure 8 sectional views of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure.

[0038] Fig. 9 sectional views of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure.

[0039] Fig.10 sectional views of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure.

[0040] Fig.11 sectional views of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure. DETAILED DESCRIPTION

[0041] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0043] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. Similarly, "including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0044] As used herein, "parallel" and "perpendicular" include the described situation and the situation similar to the described situation, and the range of the similar situation is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the error associated with the measurement of a specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°.

[0045] It will be understood that when a layer or an element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present between the layer or element and the other layer or substrate.

[0046] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include deviations in shape due to, for example, manufacturing. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shapes of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0047] Figure 1 is a front view of a foldable display device provided in some embodiments, Figure 2 is a schematic diagram of the back side of a foldable display device provided in some embodiments, Figure 3 For along Figure 2 The cross-sectional view of the A-A' line is as follows: Figures 1 to 3 As shown, the foldable display device includes a flexible display panel, a flexible circuit board 70 and a driving circuit board 80. The flexible circuit board 70 is connected between the driving circuit board 80 and the flexible display panel, and is used to provide a driving signal of the driving circuit board 80 to the flexible display panel to drive the flexible display panel to display. The flexible display panel includes a stacked arrangement of: a first supporting layer 21, a second adhesive layer 42, a flexible display substrate 10, a third adhesive layer 43 and a flexible cover plate 50.

[0048] The flexible display substrate 10 has a bending area B1 and flat areas A1 located on opposite sides of the bending area B1. The flexible display substrate 10 can be an OLED (Organic Light-Emitting Diode) display substrate, which includes a flexible substrate and a plurality of light-emitting devices, an encapsulation layer and other structures arranged on the flexible substrate. The light-emitting device includes a stacked anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and a cathode.

[0049] The first supporting layer 21 mainly plays the role of fixing and supporting the flexible display substrate 10, ensuring that the flexible display substrate 10 will not be damaged due to uneven force when the flexible display device is folded and unfolded. The first supporting layer 21 is usually made of high-strength, lightweight materials, thereby reducing the overall weight while ensuring structural strength. The second bonding layer 42 and the third bonding layer 43 can be made of optically clear adhesive (OCA) to ensure a close fit between the layers and minimize the loss of light during propagation, thereby maintaining a high-quality display effect.

[0050] like Figure 2 As shown, the first support layer 21 is provided with a plurality of grooves SL at positions corresponding to the bending area B1, so as to facilitate the bending of the flexible display device; in addition, in the flexible display device, a photosensitive element such as a camera is also provided. In order to ensure that the photosensitive element can receive the external ambient light, a light hole V1 is provided at the corresponding position of the first support layer 21. After the light hole V1 is provided, the structural strength and supporting performance of the area are inevitably affected. Specifically, when the flexible display device is subjected to an external extrusion force F, since the first support layer 21 has a light hole V1, the complete support structure 20 is lost, so local deformation is prone to occur. This deformation may cause stress concentration problems at the position of the light hole V1. The concentrated stress will directly act on the thin film transistor on the flexible display substrate 10, causing damage to the thin film transistor, thereby seriously affecting the display effect of the flexible display panel. In addition, the protective ability of the first support layer 21 at the light hole V1 is weakened, which increases the possibility of damage to the encapsulation layer in the flexible display substrate 10. The encapsulation layer is a key barrier that protects sensitive materials inside the flexible display panel from being corroded by moisture and oxygen. Once the encapsulation layer is damaged, moisture or oxygen may penetrate into the display layer or the driving layer, causing oxidation, corrosion and other problems, which manifest as black spots (Dead Pixels) or dark areas on the screen. In severe cases, it may even cause the entire flexible display panel to fail.

[0051] In order to solve the above problem, in some other embodiments, a light-transmitting structure 30 is provided at the position of the light-through hole V1. Figure 4 is a cross-sectional view of a display panel provided in some other embodiments, such as Figure 4 As shown, the display panel further includes a light-transmitting structure 30, which includes an integrally formed boss portion 30a and a skirt portion 30b, a portion of the boss portion 30a is located in the light-through hole V1, and the skirt portion 30b is bonded to the first support layer 21 through a bonding layer 40. In this way, when the display device is squeezed or dropped, the flexible display substrate 10 is not easily damaged due to lack of support at the position corresponding to the light-through hole V1, thereby preventing the thin film transistor from being damaged due to external force and the packaging layer from being damaged.

[0052] However, in Figure 4 In the figure, the boss portion 30a and the skirt portion 30b are an integrally formed structure, both of which are made of translucent plastic. In this case, although the skirt portion 30b can provide certain support, due to the limitations of the mechanical properties of the material itself and the thickness setting, when encountering a large load, it is easy to deform, and the connection stability between the translucent structure 30 and the supporting structure 20 is not high, which makes this area insufficient in anti-extrusion and anti-impact capabilities.

[0053] In order to solve at least one of the above technical problems, an embodiment of the present disclosure provides a display panel. Figure 5A is a cross-sectional view of a display panel and a light-transmitting structure provided in some embodiments of the present disclosure, Figure 5A For the corresponding Figure 2 The cross-sectional view at the A-A' line is as follows: Figure 5A As shown, the display panel includes: a flexible display substrate 10, a support structure 20 and a light-transmitting structure 30. The flexible display substrate 10 has a display surface and a non-display surface that are arranged opposite to each other. The display surface is the surface of the flexible display substrate 10 for displaying images. In one example, the flexible display substrate 10 is an OLED display substrate 10. The support structure 20 is connected to the non-display surface and is provided with a light-through hole V1, which passes through the support structure 20 in the thickness direction of the display panel. The shape of the light-through hole V1 can be set according to actual needs. For example, the orthographic projection shape of the light-through hole V1 on the flexible display substrate 10 is circular or polygonal. At least a part of the light-transmitting structure 30 is located in the light-through hole V1, which is used to provide support force for the flexible display substrate 10 when the display panel is squeezed. Among them, one of the light-transmitting structure 30 and the supporting structure 20 includes a limiting portion 3a, and the other includes a limiting groove 3b matching the limiting portion 3a, the limiting groove 3b has a first surface S1 and a second surface S2 arranged opposite to each other along the thickness direction of the display panel, at least a part of the limiting portion 3a is located in the limiting groove 3b, and is in contact with the first surface S1 and the second surface S2.

[0054] In the embodiment of the present disclosure, one of the light-transmitting structure 30 and the supporting structure 20 has a limiting groove 3b, and the other has a limiting portion 3a. The limiting portion 3a is arranged in the limiting groove 3b to form a mutually interlocking structure. Compared with the bonding method, the light-transmitting structure 30 and the supporting structure 20 can maintain a stable connection in the thickness direction of the display panel through the interlocking between the limiting groove 3b and the limiting portion 3a, thereby improving the display panel's anti-extrusion and anti-impact capabilities at the position of the light-through hole V1.

[0055] In some embodiments, the limiting groove 3b also has a third surface S3 connecting the first surface S1 and the second surface S2, and the limiting portion 3a is in contact with the third surface S3, so that the limiting portion 3a and the limiting groove 3b form a tightly fitted structure, further improving the connection stability between the light-transmitting structure 30 and the supporting structure 20, and improving the display panel's ability to resist extrusion and impact.

[0056] In some embodiments, at least one of the first surface S1, the second surface S2, and the third surface S3 may be provided with a concave or convex microstructure, and correspondingly, the limiting portion 3a may be provided with a convex or concave microstructure, so that the microstructure on the limiting groove 3b and the microstructure on the limiting portion 3a are engaged with each other, thereby further improving the bonding force between the limiting portion 3a and the limiting groove 3b. Figure 5B As shown, the first surface S1, the second surface S2 and the third surface S3 are all provided with protrusions 3d, and the limiting portion 3a is provided with a recess 3d.

[0057] In some embodiments, Figure 5A As shown, the support structure 20 includes two support layers, namely, a first support layer 21 and a second support layer 22. The first support layer 21 is connected to the non-display surface; the second support layer 22 is located on the side of the first support layer 21 away from the first support layer 21; the light hole V1 includes a first hole portion V11 penetrating the first support layer 21 and a second hole portion V12 penetrating the second support layer 22. The light-transmitting structure 30 includes a limiting groove 3b, and the second support layer 22 includes a limiting portion 3a and a connecting portion 22a connected to the limiting portion 3a. The limiting portion 3a surrounds the second hole portion V12, and the connecting portion 22a surrounds the limiting portion 3a and is connected to the first support layer 21.

[0058] In one example, the light-transmitting structure 30 may be made of a material with good optical transmission properties, such as polycarbonate (PC) or polymethyl methacrylate (PMMA). These two materials can ensure smooth passage of light while also providing certain mechanical strength and impact resistance.

[0059] In one example, the second supporting layer 22 and the light-transmitting structure 30 may be tightly assembled using precision molds and injection molding technology to form an integrated structural unit.

[0060] In one example, the first support layer 21 and the second support layer 22 can be made of high-strength materials, for example, the first support layer 21 and the second support layer 22 are both metal layers, so as to improve the structural rigidity of the integrated structural unit formed by the second support layer 22 and the light-transmitting structure 30, and effectively disperse the external impact force, reduce the possibility of deformation of the above-mentioned integrated structural unit, and thus provide a more effective protection effect for the position of the flexible display substrate 10 corresponding to the light-through hole V1. For example, the first support layer 21 and the second support layer 22 are both made of stainless steel.

[0061] In some embodiments, the connecting portion 22a of the second supporting layer 22 is bonded to the first supporting layer 21 through the first bonding layer 41, so as to facilitate the assembly of the above-mentioned integrated structural unit and the second supporting layer 22. The first bonding layer 41 can be a double-sided adhesive, an optical adhesive layer or the like.

[0062] In some embodiments, the limiting portion 3a and the connecting portion 22a of the second supporting layer 22 have the same thickness, so as to facilitate the manufacture of the second supporting layer 22. The limiting portion 3a and the connecting portion 22a are made of the same material and are an integral structure.

[0063] In some embodiments, the thickness of the second supporting layer 22 is less than the thickness of the first supporting layer 21, so that the space occupied by the second supporting layer 22 and the light-transmitting structure 30 as a whole in the display device can be reduced. In addition, when the second supporting layer 22 is bonded to the first supporting layer 21, pressure can be applied to the second supporting layer 22 by roller pressing to perform the bonding; when the second supporting layer 22 has a smaller thickness, it is easier for the roller to perform rolling and pressing operations.

[0064] In some embodiments, there is a gap between the surface of the light-transmitting structure 30 facing the flexible display substrate 10 (hereinafter referred to as the upper surface of the light-transmitting structure 30) and the non-display surface of the flexible display substrate 10. In other words, the distance between the surface of the limiting portion 3a facing the flexible display substrate 10 and the upper surface of the light-transmitting structure 30 is smaller than the distance between the surface of the limiting portion 3a facing the display substrate 10 and the non-display surface. The advantage of this arrangement is that, in the presence of installation tolerances, the light-transmitting structure 30 is prevented from exerting pressure on the flexible display substrate 10, causing the flexible display substrate 10 to be lifted up at the position of the light-through hole V1, resulting in poor display.

[0065] Among them, a second adhesive layer 42 is arranged between the supporting structure 20 and the non-display surface, and the distance between the upper surface of the light-transmitting structure 30 and the non-display surface is a first distance, which is smaller than the thickness of the second adhesive layer 42, thereby ensuring that when the flexible display substrate 10 is squeezed, the light-transmitting structure 30 supports the flexible display substrate 10.

[0066] In some embodiments, there is a gap between the light-transmitting structure 30 and the side wall of the first hole portion V11 (ie, the first supporting layer 21 ), thereby ensuring that the integrated unit formed by the light-transmitting structure 30 and the second supporting layer 22 can be easily installed with the first supporting layer 21 when there is an installation tolerance.

[0067] In some embodiments, Figure 5A As shown, the display panel further includes: a flexible cover plate 50 and a third adhesive layer 43. The flexible cover plate 50 is located on the side of the flexible display substrate 10 away from the support structure 20. The flexible cover plate 50 can be made of an ultra-thin and transparent plastic film such as polyimide (Polyimide) or ultra-thin glass (Ultra-thin Glass), which has good flexibility and optical transparency. The flexible cover plate 50 is used to protect the flexible display substrate 10 from wear, scratches and external environmental influences. The third adhesive layer 43 is bonded between the flexible display substrate 10 and the flexible cover plate 50. The third adhesive layer 43 can be an optically transparent adhesive layer to reduce the loss of light during the propagation process and ensure the display effect.

[0068] Figure 6 is a cross-sectional view of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure, Figure 6 Corresponds to Figure 2 The A-A' position in Figure 6 The display panel shown is Figure 5A Similarly, both include: a flexible display substrate 10, a support structure 20 and a light-transmitting structure 30, and one of the light-transmitting structure 30 and the support structure 20 includes a limiting portion 3a, and the other includes a limiting groove 3b matching the limiting portion 3a. Figure 5A The difference is that in Figure 6 In the embodiment, the limiting groove 3b is arranged on the light-transmitting structure 30, the supporting structure 20 includes a supporting layer, namely, the first supporting layer 21, and the light-through hole V1 is arranged on the first supporting layer 21. The first supporting layer 21 includes a limiting portion 3a and a supporting portion 21a connected to the limiting portion 3a, the limiting portion 3a surrounds the light-through hole V1, the supporting portion 21a surrounds the limiting portion 3a, the supporting portion 21a is connected to the non-display surface, and the thickness of the limiting portion 3a is less than or equal to the thickness of the supporting portion 21a. For example, the limiting portion 3a is equal to the thickness of the supporting portion 21a, the limiting portion 3a is made of the same material as the supporting portion 21a, and the two are an integrally formed structure.

[0069] The light-transmitting structure 30 can be made of a material with good optical transmission properties, such as polycarbonate or polymethyl methacrylate, which can provide certain mechanical strength and impact resistance while ensuring smooth passage of light. The first support layer 21 is made of a strong metal material, such as an alloy material, to improve the support effect.

[0070] and Figure 5A The same is that in Figure 6 In the display panel shown, the limiting groove 3b also includes a third surface S3, and the limiting portion 3a is in contact with the third surface S3. In one example, at least one of the first surface S1, the second surface S2, and the third surface S3 may be provided with a microstructure such as a depression or a protrusion, and correspondingly, a microstructure such as a protrusion or a depression may be provided on the limiting portion 3a, so that the microstructure on the limiting groove 3b and the microstructure on the limiting portion 3a are engaged with each other, thereby further improving the bonding force between the limiting portion 3a and the limiting groove 3b.

[0071] and Figure 5A The difference is, Figure 6 In the embodiment, there is no gap between the light-transmitting structure 30 and the first supporting layer 21, but they are tightly fitted. In actual production, the light-transmitting structure 30 can be directly formed at the position of the light-through hole V1 of the first supporting layer 21 by injection molding, so that the light-transmitting structure 30 and the first supporting layer 21 form an integrated structural unit. This method not only eliminates the tolerance problem caused by the bonding of the independent light-transmitting structure 30 with the first supporting layer 21, and improves the structural stability, but also greatly enhances the connection strength between the light-transmitting structure 30 and the first supporting layer 21 due to the close combination of the light-transmitting structure 30 and the first supporting layer 21, and improves the overall anti-extrusion and anti-impact performance of the display panel. In addition, since the product quality can be directly controlled during the injection molding process, the errors and uncertainties caused by secondary assembly are reduced. At the same time, this integrated structural unit is not prone to bonding failure problems caused by environmental changes or mechanical stress during long-term use, thereby significantly improving the service life of the display panel and the user experience.

[0072] In some embodiments, Figure 6 As shown, the light-transmitting structure 30 includes: a main body 33 and a first skirt portion 31 and a second skirt portion 32 arranged on the side wall of the main body 33, at least part of the main body 33 is located in the light-through hole V1; the first skirt portion 31 and the second skirt portion 32 are arranged opposite to each other in the thickness direction of the display panel, and define a limiting groove 3b with the main body 33. The first skirt portion 31 and the second skirt portion 32 are made of the same material as the main body 33, and are an integrally formed structure. The width of the second skirt portion 32 can be smaller than the width of the first skirt portion 31.

[0073] and Figure 5A The same, in Figure 6 In the embodiment, a second adhesive layer 42 is arranged between the first supporting layer 21 and the display substrate 10, and a first distance exists between the upper surface of the light-transmitting structure 30 and the non-display surface. The first distance is smaller than the thickness of the second adhesive layer 42 to ensure that the light-transmitting structure 30 supports the flexible display substrate 10 when the flexible display substrate 10 is squeezed.

[0074] and Figure 5A The same, in Figure 6 In the embodiment, the display panel further includes a flexible cover plate 50 and a third adhesive layer 43, as described above. Figure 5A Description.

[0075] Figure 7 is a cross-sectional view of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure, Figure 7 Corresponds to Figure 2 The A-A' position in Figure 7 The display panel shown is Figure 6 Similarly, both include: a flexible display substrate 10, a support structure 20 and a light-transmitting structure 30, and one of the light-transmitting structure 30 and the support structure 20 includes a limiting portion 3a, and the other includes a limiting groove 3b matching the limiting portion 3a. The limiting groove 3b is arranged on the light-transmitting structure 30, and the support structure 20 includes a supporting layer, namely, a first supporting layer 21, and the light-through hole V1 is opened on the first supporting layer 21. The first supporting layer 21 includes the limiting portion 3a and a supporting portion 21a connected to the limiting portion 3a, the limiting portion 3a surrounds the light-through hole V1, the supporting portion 21a surrounds the limiting portion 3a, and the supporting portion 21a is connected to the non-display surface. And, in Figure 7 In the figure, the limiting groove 3b also includes a third surface S3, and the limiting portion 3a is in contact with the third surface S3. The light-transmitting structure 30 includes: a main body 33 and a first skirt portion 31 and a second skirt portion 32 arranged on the side wall of the main body 33, and at least a part of the main body 33 is located in the light-through hole V1; the first skirt portion 31 and the second skirt portion 32 are arranged relative to each other in the thickness direction of the display panel, and define a limiting groove 3b with the main body 33. The first skirt portion 31 is located on the side of the second skirt portion 32 away from the flexible display substrate 10. The width of the second skirt portion 32 is smaller than the width of the first skirt portion 31. Among them, the light-transmitting structure 30 can be directly formed at the position of the light-through hole V1 of the first supporting layer 21 by injection molding, so that the light-transmitting structure 30 and the first supporting layer 21 form an integrated structural unit. The following is about Figure 7 and Figure 6 The difference is introduced.

[0076] and Figure 6 The difference is that in Figure 7 In the embodiment, the thickness of the limiting portion 3a is less than the thickness of the supporting portion 21a. Specifically, the distance between the upper surface of the limiting portion 3a and the non-display surface is greater than the distance between the upper surface of the supporting portion 21a and the non-display surface. The thickness of the first skirt portion 31 may be greater than or equal to the height difference between the upper surface of the limiting portion 3a and the upper surface of the supporting portion 21a. For example, the upper surface of the first skirt portion 31 is flush with the upper surface of the supporting portion 21a, and the lower surface of the supporting portion 21a is flush with the lower surface of the limiting portion 3a.

[0077] It should be noted that the “upper surface” of a certain structure in the embodiment of the present disclosure refers to the surface of the structure facing the flexible display substrate 10 ; the “lower surface” of a certain structure refers to the surface of the structure away from the flexible display substrate 10 .

[0078] and Figure 6 The same, in Figure 7 In the embodiment, the display panel further includes a second adhesive layer 42, a third adhesive layer 43 and a flexible cover plate 50, wherein the second adhesive layer 42 is located between the support portion 21a of the first support layer 21 and the non-display surface; the third adhesive layer 43 bonds the flexible display substrate 10 and the flexible cover plate 50; there is a first gap between the upper surface of the light-transmitting structure 30 and the non-display surface, and the first gap is smaller than the thickness of the second adhesive layer 42. The materials of each structural layer are referenced to the above Figure 6 Description.

[0079] Figure 8 is a cross-sectional view of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure, Figure 8 Corresponds to Figure 2 The A-A' position in Figure 8 The display panel shown is Figure 7 Similar, the following only introduces the difference between the two. Figure 8 In the embodiment, the maximum distance between the surface of the light-transmitting structure 30 away from the display substrate 10 and the non-display surface is a first distance, and the maximum distance between the surface of the support portion 21a away from the display substrate 10 and the non-display surface is a second distance, and the first distance is less than or equal to the second distance.

[0080] For example, Figure 8 As shown, the lower surface of the support portion 21a is flush with the lower surface of the light-transmitting structure 30. That is, the first support layer 21 is etched near the light-through hole V1 to achieve local thinning, thereby forming the limit portion 3a, and the total thickness of the limit portion 3a and the first skirt portion 31 is equal to the thickness of the support portion 21a.

[0081] for Figure 8 The display panel shown can also be directly formed with a light-transmitting structure 30 at the position of the light-through hole V1 of the first support layer 21 by injection molding, so that the light-transmitting structure 30 and the first support layer 21 form an integrated structural unit. FIG. 5A to FIG. 7 In terms of Figure 8 The display panel shown can prevent the light-transmitting structure 30 from protruding too much from the bottom of the first supporting layer 21, thereby ensuring the flatness of the back side of the display panel.

[0082] Fig. 9 is a cross-sectional view of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure, Fig. 9 Corresponds to Figure 2 The A-A' position in Fig. 9 The display panel shown is Figure 8 Similar, but different in that, Fig. 9 The lower surface of the middle support portion 21 a is flush with the lower surface of the light-transmitting structure 30 ; the upper surface of the second skirt portion 32 is flush with the upper surface of the support portion 21 a .

[0083] In addition, Fig. 9 In the embodiment, the width of the first skirt portion 31 and the width of the second skirt portion 32 may be equal or substantially equal.

[0084] Fig.10 is a cross-sectional view of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure, Fig.10 Corresponds to Figure 2 In the A-A' position, Fig.10 The display panel shown is Fig. 9 Similarly, the distance from the lower surface of the light-transmitting structure 30 to the non-display surface is less than or equal to the distance from the lower surface of the supporting portion 21 a to the non-display surface. Fig.10 and Fig. 9 The only difference is that Fig.10 In the embodiment, the light-transmitting structure 30 includes a main body 33 and a limiting portion 3a disposed on the side wall of the main body 33, and the limiting portion 3a is disposed around the main body 33. The limiting portion 3a and the main body 33 are an integral structure. The supporting structure 20 includes a first supporting layer 21, and the first supporting layer 21 has a light-through hole V1 and a limiting groove 3b, and the limiting groove 3b is located on the side wall of the light-through hole V1.

[0085] It should be noted that Figures 8 to 10 The illustration is made by taking the example that the lower surface of the light-transmitting structure 30 is flush with the lower surface of the supporting portion 21a. In actual applications, the thickness difference between the limiting portion 3a and the supporting portion 21a and the thickness of the first skirt portion 31 can be designed in combination with the flatness requirements of the back of the display panel and the supporting strength requirements of the supporting layer and the light-transmitting structure 30.

[0086] Fig.11 is a cross-sectional view of a light-transmitting structure, a first supporting layer, and a display panel provided in some other embodiments of the present disclosure, Fig.11 Corresponds to Figure 2 A-A' position, such as Fig.11As shown, the display panel includes: a flexible display substrate 10, a first supporting layer 21, a second supporting layer 22, and a light-transmitting structure 30. The flexible display substrate 10 includes a display surface and a non-display surface that are arranged opposite to each other, and the first supporting layer 21 is connected to the non-display surface of the flexible display substrate 10. The first supporting layer 21 is provided with a first light-through hole V1, and the second supporting layer 22 is provided with a second light-through hole V1. The orthographic projection of the first light-through hole V1 on the flexible display substrate 10 covers the orthographic projection of the second light-through hole V1 on the display substrate 10.

[0087] The light-transmitting structure 30 is fixed on the second supporting layer 22. For example, the light-transmitting structure 30 is fixed on the side of the second supporting layer 22 close to the flexible display substrate 10 through the fourth adhesive layer 44. The orthographic projection of the light-transmitting structure 30 on the flexible display substrate 10 is located within the orthographic projection range of the first light-transmitting hole on the flexible display substrate 10. The material strengths of the first supporting layer 21 and the second supporting layer 22 are both greater than the material strengths of the light-transmitting structure 30. The materials of the first supporting layer 21, the second supporting layer 22, and the light-transmitting structure 30 can all refer to the above Figure 5A Description in .

[0088] and Figure 4 In comparison, Fig.11 In the embodiment, a second support layer 22 having a greater strength is used to replace the Figure 4 The skirt portion 30b of the light-transmitting structure 30 can enable the light-transmitting structure 30 to provide better support and protection for the flexible display substrate 10 at the position of the light-through hole V1, thereby enhancing the anti-extrusion and anti-impact capabilities of this area.

[0089] exist Fig.11 In the embodiment, the second supporting layer 22 and the first supporting layer 21 can be bonded by the first bonding layer 41. The second bonding layer 42 is provided between the first supporting layer 21 and the non-display surface of the flexible display substrate 10. A flexible cover plate 50 is provided on the side of the flexible display substrate 10 away from the first supporting layer 21, and a third bonding layer 43 is provided between the flexible cover plate 50 and the flexible display substrate 10.

[0090] and FIG. 5A to FIG. 10 akin, Fig.11 There is a first spacing between the light-transmitting structure 30 and the non-display surface, so as to prevent the light-transmitting structure 30 from exerting pressure on the flexible display substrate 10 when there is an installation tolerance, causing the flexible display substrate 10 to be lifted up at the position of the light-through hole V1 and display failure. The first spacing is smaller than the thickness of the second adhesive layer 42, so as to ensure that the light-transmitting structure 30 supports the flexible display substrate 10 when the flexible display substrate 10 is squeezed. In addition, there is a gap between the light-transmitting structure 30 and the side wall of the first light-through hole V1 to facilitate assembly.

[0091] The embodiment of the present disclosure also provides a display device, including the display panel in any of the above embodiments. The display device may be a foldable display device. The display device may also include a photosensitive element such as a camera, which may be arranged opposite to the light hole V1 and located on the side of the light-transmitting structure away from the flexible display substrate.

[0092] The display device may include any device or product having a display function. For example, the display device may be a smart phone, a mobile phone, an e-book reader, a desktop computer (PC), a laptop PC, a netbook PC, a personal digital assistant (PDA), a portable multimedia player (PMP), a digital audio player, a mobile medical device, a camera, a wearable device (such as a head-mounted device, an electronic garment, an electronic bracelet, an electronic necklace, an electronic accessory, an electronic tattoo, or a smart watch), etc.

[0093] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A display panel, characterized in that: include: A flexible display substrate, wherein the flexible display substrate has a display surface and a non-display surface that are arranged opposite to each other; A supporting structure, the supporting structure is connected to the non-display surface and is provided with a light-through hole; a light-transmitting structure, at least a portion of which is located in the light-through hole; Among them, one of the light-transmitting structure and the supporting structure includes a limiting portion, and the other includes a limiting groove matching the limiting portion, the limiting groove has a first surface and a second surface arranged opposite to each other along the thickness direction of the display panel, and at least a part of the limiting portion is located in the limiting groove and is in contact with the first surface and the second surface.

2. The display panel according to claim 1, characterized in that: The support structure comprises: a first support layer and a second support layer, the first support layer is connected to the non-display surface; the second support layer is located on a side of the first support layer away from the first support layer; the light-through hole comprises a first hole portion penetrating the first support layer and a second hole portion penetrating the second support layer; The light-transmitting structure includes the limiting groove, the second supporting layer includes the limiting portion and a connecting portion connected to the limiting portion, the limiting portion surrounds the second hole portion, and the connecting portion surrounds the limiting portion and is connected to the first supporting layer.

3. The display panel according to claim 2, characterized in that: The connecting portion is bonded to the first supporting layer through a first bonding layer.

4. The display panel according to claim 2, characterized in that: The limiting portion and the connecting portion have the same thickness.

5. The display panel according to claim 2, characterized in that: The first supporting layer and the second supporting layer are both metal layers.

6. The display panel according to claim 2, characterized in that: There is a gap between the light-transmitting structure and the side wall of the first hole portion.

7. The display panel according to claim 1, characterized in that: The light-transmitting structure includes the limiting groove; The supporting structure includes a first supporting layer having the light-through hole, the first supporting layer includes the limiting portion and a supporting portion connected to the limiting portion, the limiting portion surrounds the light-through hole, the supporting portion surrounds the limiting portion, the supporting portion is connected to the non-display surface, and the thickness of the limiting portion is less than or equal to the thickness of the supporting portion.

8. The display panel according to claim 7, characterized in that: The light-transmitting structure comprises: a main body, and a first skirt portion and a second skirt portion arranged on a side wall of the main body, wherein at least a portion of the main body is located in the light-through hole; the first skirt portion and the second skirt portion are arranged opposite to each other in a thickness direction of the display panel, and define the limiting groove with the main body; The total thickness of the first skirt portion, the second skirt portion and the limiting portion is less than or equal to the thickness of the supporting portion.

9. The display panel according to claim 1, characterized in that: The support structure comprises a first support layer having the limiting groove and the light-through hole, wherein the limiting groove is located on the side wall of the light-through hole; The light-transmitting structure includes: a main body and a limiting portion connected to a side wall of the main body, wherein the limiting portion is arranged around the main body.

10. The display panel according to claim 7 or 8, characterized in that: The maximum distance between the surface of the light-transmitting structure away from the display substrate and the non-display surface is a first distance, the maximum distance between the surface of the supporting portion away from the display substrate and the non-display surface is a second distance, and the first distance is less than or equal to the second distance.

11. The display panel according to any one of claims 1 to 9, characterized in that: The limiting groove further has a third surface connecting the first surface and the second surface, and the limiting portion is in contact with the third surface.

12. The display panel according to any one of claims 1 to 9, characterized in that: A second adhesive layer is disposed between the supporting structure and the non-display surface. A first distance exists between a surface of the light-transmitting structure facing the display substrate and the non-display surface. The first distance is smaller than a thickness of the second adhesive layer.

13. The display panel according to any one of claims 1 to 9, characterized in that: The display panel further includes: A flexible cover plate, located on a side of the flexible display substrate away from the supporting structure; The third adhesive layer is bonded between the flexible display substrate and the flexible cover plate.

14. A display device, characterized in that: A display panel comprising any one of claims 1 to 13.

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