Display panel and display device

Abstract

The utility model discloses a display panel and a display device. The display panel comprises a folding area and non-folding areas located on the two sides of the folding area. The folding area comprises a flexible display layer, a concave buffer layer and a hinge layer which are stacked in sequence; the concave buffer layer is located between the flexible display layer and the hinge layer; the concave surface of the concave buffer layer is used as a contact surface of the concave buffer layer and the flexible display layer; wherein in the folding state, the concave surface of the concave buffer layer wraps the bent flexible display layer. According to the display panel, deformation impact generated when the flexible display layer is folded is dealt with through the concave surface design of the concave buffer layer, stress release generated when the flexible display layer is folded is facilitated, therefore, creases and impressions of the flexible display layer in the display panel are relieved, and meanwhile the external impact resistance capacity of a folding area in the display panel is improved.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model relates to display technical field, especially display panel and display device. BACKGROUND

[0002] With the continuous development of the technology of the display screen of electronic product, the display screen of straight board cannot satisfy the present situation, and begins to develop and apply to the product of folding display screen.

[0003] At present, the market share of folding display screen gradually rises, and the technology is gradually mature, but its unique foldable performance causes the folding area to also become the weak point of the whole screen. With long time use, the folding area of folding display screen is easy to produce the crease caused by the cumulative bending deformation of display film layer and be damaged by external impact, thereby reducing the display effect of display panel. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of display panel and display device, to realize the crease and mark in display panel, improve the ability of folding area in display panel to resist external impact simultaneously.

[0005] Firstly, the utility model embodiment provides a kind of display panel, the display panel includes folding area and the non-folding area located in the folding area both sides;

[0006] The folding area includes flexible display layer, concave buffer layer and hinge layer that are sequentially stacked;The concave buffer layer is located between the flexible display layer and the hinge layer;

[0007] The concave surface of the concave buffer layer is as the contact surface of the concave buffer layer and the flexible display layer;Wherein, in folding state, the concave surface of the concave buffer layer wraps the flexible display layer that is bent.

[0008] Further, the concave buffer layer includes first support layer, adhesive layer and second support layer that are sequentially stacked;

[0009] The upper surface of the first support layer is concave, and the upper surface of the first support layer is as the concave surface of the concave buffer layer;The lower surface of the first support layer is plane, and the lower surface of the first support layer is in contact with the adhesive layer;

[0010] The upper surface of the second support layer is in contact with the adhesive layer, and the lower surface of the second support layer is in contact with the hinge layer.

[0011] Optionally, the cross section of the first support layer is U-shaped.

[0012] Optionally, the material of the first support layer and the second support layer is same.

[0013] Optionally, the thickness of the first support layer and the second support layer is greater than the thickness of the adhesive layer.

[0014] Further, the folding area further comprises a flexible non-display layer, the flexible non-display layer, the concave buffer layer and the hinge layer are sequentially stacked; the concave buffer layer is located between the flexible non-display layer and the hinge layer.

[0015] Further, the display panel comprises a display area and a non-display area surrounding the display area, the flexible display layer is located in the display area, and the flexible non-display layer is located in the non-display area.

[0016] Further, the hinge layer is provided with a hinge for controlling the non-folding area to fold along the folding area.

[0017] Optionally, the display panel comprises a plurality of folding areas and a plurality of non-folding areas located on both sides of the folding areas.

[0018] In a second aspect, the utility model embodiment further provides a display device, including the display panel of any embodiment of the utility model.

[0019] The utility model discloses a display panel and display device, and the display panel comprises a folding area and a non-folding area located on both sides of the folding area. The folding area comprises a flexible display layer, a concave buffer layer and a hinge layer which are sequentially stacked. The concave buffer layer is located between the flexible display layer and the hinge layer. The concave surface of the concave buffer layer serves as the contact surface of the concave buffer layer and the flexible display layer. In the folding state, the concave surface of the concave buffer layer wraps the bent flexible display layer. The concave surface of the concave buffer layer is designed to cope with the deformation impact when the flexible display layer is folded. This is conducive to stress release when the flexible display layer is folded, thereby relieving the generation of folds and imprints of the flexible display layer in the display panel and improving the ability of the folding area of the display panel to resist external impact. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model provides a kind of display panel plane schematic diagram for embodiment of the utility model.

[0021] Figure 2 The utility model provides the sectional structure schematic diagram of folding area of display panel for embodiment of the utility model.

[0022] Figure 3 The utility model provides the structure schematic diagram of concave buffer layer for embodiment of the utility model.

[0023] Figure 4 The utility model provides another display panel plane schematic diagram for embodiment of the utility model.

[0024] Figure 5 A cross-sectional structure schematic view of a folding area of the display panel provided by the embodiment of the present application is shown in FIG. 2. DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures.

[0026] Since the organic material on the foldable display panel is prone to plastic deformation in the long-term folding process, in order to solve the problem of creases in the folding area of the display panel due to plastic deformation, the embodiment of the present application provides a display panel to alleviate the generation of creases and marks in the display panel, and at the same time improve the ability of the folding area of the display panel to resist external impact.

[0027] Figure 1 A plane schematic view of the display panel provided by the embodiment of the present application is shown in FIG. 1, Figure 2 A cross-sectional structure schematic view of a folding area of the display panel provided by the embodiment of the present application is shown in FIG. 2, Figure 2 is a cross section along the straight line AB in the folding area 10, as shown in Figure 1 and Figure 2 The display panel includes the folding area 10 and the non-folding area 20 located on both sides of the folding area 10.

[0028] The folding area 10 includes a flexible display layer 110, a concave buffer layer 120 and a hinge layer 130 which are sequentially stacked; the concave buffer layer 120 is located between the flexible display layer 110 and the hinge layer 130.

[0029] The concave surface of the concave buffer layer 120 serves as the contact surface of the concave buffer layer 120 and the flexible display layer 110; wherein in the folded state, the concave surface of the concave buffer layer 120 wraps the bent flexible display layer 110.

[0030] The display panel includes the folding area 10 and the non-folding area 20 located on both sides of the folding area, the non-folding area 20 on one side can be folded along the folding area 10 to the non-folding area 20 on the other side, Figure 1The width ratio of the folding area 10 and the non-folding area 20 shown in the figure is not the actual width ratio, but only highlights the positional relationship between the folding area 10 and the non-folding area 20. The flexible display layer 110 is not only arranged in the folding area 10, but also extends to the non-folding area 20 located on both sides of the folding area 10. The flexible display layer 110 is made of flexible material and electronic elements, and can be folded and bent and display pictures. The hinge layer 130 can be provided with a mechanical rotating shaft structure. During the folding process of the non-folding area 20 along the folding area 10, the hinge layer 130 can fix the bending angle of the non-folding area 20 relative to the folding area 10, so as to avoid the non-folding area 20 being randomly bent relative to the folding area 10.

[0031] Specifically, the concave buffer layer 120 is located between the flexible display layer 110 and the hinge layer 130. The concave surface in the concave buffer layer 120 serves as the contact surface between the concave buffer layer 120 and the flexible display layer 110. During the folding process of the non-folding area 20 along the folding area 10, the flexible display layer 110 in the folding area 10 gradually bends, and the cross section of the flexible display layer 110 gradually changes from a plane to a U-shaped curved surface, and a certain degree of stress is applied to the concave buffer layer 120. When the flexible display layer 110 bends quickly, the stress applied to the concave buffer layer 120 by the flexible display layer 110 is greater. Therefore, through the design of the concave surface of the concave buffer layer 120, during the folding process of the non-folding area 20 along the folding area 10, the concave surface of the concave buffer layer 120 gradually wraps the bent flexible display layer 110 until the folding is completed. When the display panel is in a folded state, the concave surface of the concave buffer layer 120 completely wraps the bent flexible display layer 110, so that the stress of the flexible display layer 110 when bending is released, the bending stress is reduced, and the deformation impact of the flexible display layer 110 when folding can be effectively coped with, thereby relieving the generation of creases and imprints of the flexible display layer in the display panel, and improving the ability of the folding area of the display panel to resist external impact.

[0032] In addition, the flat side of the concave buffer layer 120 is in contact with the hinge layer 130, so as to buffer the bending impact force in the hinge layer 130, prevent the force on one side of the hinge layer 130 from being applied to the flexible display layer 110, and thus improve the impact resistance of the display panel and reduce the risk of rupture of the flexible display layer 110.

[0033] The utility model embodiment provides a kind of display panel, display panel includes folding area and the non-folding area located in the both sides of folding area;Folding area includes the flexible display layer, concave buffer layer and hinge layer that are sequentially stacked;Concave buffer layer is located between flexible display layer and hinge layer;The concave surface of concave buffer layer is as the contact surface of concave buffer layer and flexible display layer;Wherein, in folding state, the concave surface of concave buffer layer is wrapped flexible display layer that is bent, and through the concave surface design of concave buffer layer, the deformation impact when flexible display layer folds is responded, it is favorable to the stress release when flexible display layer folds, to relieve the generation of crease and mark of flexible display layer in display panel, improve the ability of folding area in display panel to resist external impact simultaneously.

[0034] Further, Figure 3 The structure diagram of the concave buffer layer provided by the utility model embodiment is as shown in Figure 3 The concave buffer layer 120 includes first support layer 1201, adhesive layer 1202 and second support layer 1203 that are sequentially stacked.

[0035] The upper surface of first support layer 1201 is concave, and the upper surface of first support layer 1201 is as the concave surface of concave buffer layer 120;The lower surface of first support layer 1201 is plane, and the lower surface of first support layer 1201 is in contact with adhesive layer 1202.

[0036] The upper surface of second support layer 1203 is in contact with adhesive layer 1202, and the lower surface of second support layer 1203 is in contact with hinge layer 130.

[0037] Wherein, the material of first support layer 1201, adhesive layer 1202 and second support layer 1203 all has the ability of bending deformation, on the one hand, it can adapt to the folding process of non-folding area 20 along folding area 10 by bending deformation, on the other hand, it can absorb the stress impact of flexible display layer 110 and hinge layer 130 in the folding process of non-folding area 20 along folding area 10 by deformation.

[0038] Specifically, the concave buffer layer 120 comprises a first support layer 1201, a glue layer 1202 and a second support layer 1203 which are sequentially stacked, and the first support layer 1201, the glue layer 1202 and the second support layer 1203 are all located in the folding area 10. The upper surface of the first support layer 1201 is concave, and the upper surface of the first support layer 1201 serves as the concave surface of the concave buffer layer 120. Therefore, during the folding process of the non-folding area 20 along the folding area 10, the concave surface of the first support layer 1201 will gradually wrap the bent flexible display layer 110 until the folding is completed. When the display panel is in the folded state, the concave surface of the first support layer 1201 completely wraps the bent flexible display layer 110, so that the stress of the flexible display layer 110 when bending is released, which can effectively cope with the deformation impact of the flexible display layer 110 when folding, thereby reducing the bending stress of the flexible display layer 110 in the display panel, partially relieving the generation of folds and imprints, so that the display panel can withstand more folding, and the service life of the display panel is improved.

[0039] In addition, the lower surface of the first support layer 1201 is a plane, the lower surface of the first support layer 1201 is in contact with the glue layer 1202, and the upper and lower surfaces of the glue layer 1202 are also planes. Through the close contact between the first support layer 1201 and the glue layer 1202, the glue layer 1202 can act as a buffer layer for the first support layer 1201 to buffer the deformation impact of the flexible display layer 110 when folding, and also slow down the deformation amount of the first support layer 1201. The upper surface of the second support layer 1203 is in contact with the glue layer 1202, and the lower surface of the second support layer 1203 is in contact with the hinge layer 130. The second support layer 1203 can buffer the stress of the glue layer 1202 and protect the outside of the hinge, increase the impact resistance of the display panel, and reduce the risk of rupture of the flexible display layer 110.

[0040] Optionally, referring to Figure 3 The cross section of the first support layer 1201 is U-shaped.

[0041] Specifically, the cross section of the first support layer 1201 is U-shaped, which is beneficial to the release of the stress of the flexible display layer 110 when folding and the deformation buffer when folding. Through this structure, the concave surface of the first support layer 1201 can wrap the bent flexible display layer 110, so that the stress of the flexible display layer 110 when bending is released, which can effectively cope with the deformation impact of the flexible display layer 110 when folding, thereby reducing the bending stress of the flexible display layer 110 in the display panel, partially relieving the generation of folds and imprints.

[0042] Optionally, the materials of the first support layer 1201 and the second support layer 1203 are the same.

[0043] Specifically, by setting the first support layer 1201 and the second support layer 1203 of the same material, the manufacturing process of the first support layer 1201 and the second support layer 1203 can be simplified, the first support layer 1201 and the second support layer 1203 can both play a supporting and stress buffering role for the flexible display layer 110, and the materials of the first support layer 1201 and the second support layer 1203 can be adaptively selected, for example, can include transparent resin, silica gel and other materials. The material of the adhesive layer 1202 can be a colloid, which plays a role of bonding the first support layer 1201 and the second support layer 1203, and tightly connects the first support layer 1201, the adhesive layer 1202 and the second support layer 1203 to help release stress.

[0044] Optionally, the thickness of the first support layer 1201 and the second support layer 1203 is greater than the thickness of the adhesive layer 1202.

[0045] Specifically, the thickness of the first support layer 1201 and the second support layer 1203 is greater than the thickness of the adhesive layer 1202, so that the first support layer 1201 and the second support layer 1203 play a main stress buffering and releasing role, and can play a role of increasing the impact resistance of the display panel and reducing the risk of rupture of the flexible display layer 110. And through the relatively thin adhesive layer 1202, the first support layer 1201, the adhesive layer 1202 and the second support layer 1203 can be tightly connected to jointly cope with the stress impact of the hinge layer 130 and the flexible display layer 110.

[0046] Further, Figure 4 Another plan view of a display panel provided by the embodiment of the utility model, Figure 5 Another cross-sectional structure schematic view of a folding area of a display panel provided by the embodiment of the utility model, Figure 5 Specifically, the cross section of the folding area 10 along the straight line CD, as shown in Figure 4 And Figure 5 As shown, the folding area 10 further includes a flexible non-display layer 140, the flexible non-display layer 140, the concave buffer layer 120 and the hinge layer 130 are sequentially stacked; the concave buffer layer 120 is located between the flexible non-display layer 140 and the hinge layer 130.

[0047] Specifically, the folding area 10 penetrates the display area AA and the non-display area NA surrounding the display area AA, and the folding area 10 also has a stress impact relieving arrangement in the non-display area NA. The concave buffer layer 120 is located between the flexible non-display layer 140 and the hinge layer 130, so that the stress impact when the flexible non-display layer 140 is bent can be relieved, the stress when the flexible non-display layer 140 is bent is released, and the folding mark of the non-display layer 140 is prevented.

[0048] Further, the display panel comprises a display area AA and a non-display area NA surrounding the display area AA, the flexible display layer 110 is located in the display area AA, and the flexible non-display layer 140 is located in the non-display area NA.

[0049] The display area AA is an area capable of displaying a picture, the non-display area NA is a peripheral area surrounding the display area AA, the flexible display layer 110 is located in the display area AA, the flexible non-display layer 140 is located in the non-display area NA, and the concave buffer layer 120 and the hinge layer 130 pass through the display area AA and the non-display area NA surrounding the display area AA, so as to release the stress of the flexible display layer 110 and the flexible non-display layer 140 when being bent, prevent the flexible display layer 110 and the flexible non-display layer 140 from appearing creases, thereby reducing the creases of the folding area 10 of the display panel as a whole, reducing the cracking risk of the display panel by using the concave buffer layer 120 as a buffer structure, and improving the crease problem of the display panel.

[0050] Further, the hinge layer 130 is provided with a hinge for controlling the folding of the non-folding area 20 along the folding area 10.

[0051] Specifically, the hinge is one of the key components for the display panel to realize folding. In order to avoid damage to the display panel when folding, the hinge needs to have enough R angle when folding, and also needs to ensure that it does not hang in the air when folding. The water drop type hinge is the current mainstream design scheme, which forms a structure similar to a water drop inside the rotating shaft to protect the screen while the body can be completely attached. The design of the hinge needs to further extend the hinge structure originally used only for folding, and cleverly pull a small part of the hinge structure outward, so that the part near the rotating shaft supporting the display panel can flexibly form a structure similar to a water drop in cross section when folding, leaving enough space for the flexible screen to stretch out and avoid being damaged. When unfolded, the hinge also pulls the two outwardly extended parts straight, allowing the entire screen to form a flat surface. Through the hinge, the opening and closing and hovering of the non-folding area 20 can be realized, which plays a key role in folding closure degree, folding opening and closing feel, crease depth, and screen durability. In addition, the second support layer 1203 can buffer and protect the external impact on the hinge, increase the impact resistance of the display panel, and reduce the risk of cracking of the display panel.

[0052] Optionally, the display panel comprises a plurality of folding areas 10 and a plurality of non-folding areas 20 located on both sides of the folding areas 10.

[0053] Specifically, the display panel includes a plurality of folding areas 10 and a plurality of non-folding areas 20 located on both sides of the folding areas 10, so that multi-layer folding of the display panel can be achieved. For example, the display panel can include two folding areas 10 and three non-folding areas 20 located on both sides of the folding areas 10, so that three-layer folding of the display panel can be achieved. The folding area 10 is provided with the concave buffer layer 120 in the embodiment of the present application. The concave buffer layer 120 is designed in a concave shape, which is beneficial to the stress release of the flexible display layer 110 during folding and the buffering of the deformation of the flexible display layer 110.

[0054] The embodiment of the present application provides a display panel. The concave surface design of the concave buffer layer is used to deal with the deformation impact of the flexible display layer during folding, which is beneficial to the stress release of the flexible display layer during folding, thereby relieving the generation of folding marks and printing marks of the flexible display layer in the display panel, and improving the ability of the folding area of the display panel to resist external impact.

[0055] The embodiment of the present application also provides a display device, which has the beneficial effects of the display panel proposed in the above embodiments. The display device includes the display panel in any of the above embodiments.

[0056] Specifically, the display device provided by the embodiment of the present application includes the display panel proposed in any of the above embodiments. The display panel includes a folding area and a non-folding area located on both sides of the folding area. The folding area includes a flexible display layer, a concave buffer layer and a hinge layer which are sequentially stacked. The concave buffer layer is located between the flexible display layer and the hinge layer. The concave surface of the concave buffer layer serves as the contact surface of the concave buffer layer and the flexible display layer. In the folding state, the concave surface of the concave buffer layer wraps the bent flexible display layer. The concave surface design of the concave buffer layer is used to deal with the deformation impact of the flexible display layer during folding, which is beneficial to the stress release of the flexible display layer during folding, thereby relieving the generation of folding marks and printing marks of the flexible display layer in the display panel, and improving the ability of the folding area of the display panel to resist external impact, so that the display device can withstand more folding, and the service life of the display device is improved. For example, the display device can be a mobile phone, a wearable device with display function, a computer or the like.

[0057] Note that the above are only preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments herein, and those skilled in the art can make various obvious changes, readjustments and substitutions without departing from the scope of protection of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A display panel, characterized in that, The display panel includes a foldable area and non-foldable areas located on both sides of the foldable area; The folding area includes a flexible display layer, a concave buffer layer, and a hinge layer stacked sequentially; the concave buffer layer is located between the flexible display layer and the hinge layer. The concave surface of the concave buffer layer serves as the contact surface between the concave buffer layer and the flexible display layer; wherein, in the folded state, the concave surface of the concave buffer layer wraps around the bent flexible display layer.

2. The display panel according to claim 1, characterized in that, The concave buffer layer includes a first support layer, an adhesive layer, and a second support layer stacked sequentially. The upper surface of the first support layer is concave, and the upper surface of the first support layer serves as the concave surface of the concave buffer layer; The lower surface of the first support layer is a plane, and the lower surface of the first support layer is in contact with the adhesive layer; The upper surface of the second support layer is in contact with the adhesive layer, and the lower surface of the second support layer is in contact with the hinge layer.

3. The display panel according to claim 2, characterized in that, The first support layer has a U-shaped cross-section.

4. The display panel according to claim 2, characterized in that, The first support layer and the second support layer are made of the same material.

5. The display panel according to claim 2, characterized in that, The thickness of the first support layer and the second support layer is greater than the thickness of the adhesive layer.

6. The display panel according to claim 1, characterized in that, The folded area also includes a flexible non-display layer, and the flexible non-display layer, the concave buffer layer, and the hinge layer are stacked sequentially; the concave buffer layer is located between the flexible non-display layer and the hinge layer.

7. The display panel according to claim 6, characterized in that, The display panel includes a display area and a non-display area surrounding the display area, the flexible display layer is located in the display area, and the flexible non-display layer is located in the non-display area.

8. The display panel according to claim 1, characterized in that, The hinge layer is provided with a hinge that controls the non-folding area to fold along the folding area.

9. The display panel according to any one of claims 1-8, characterized in that, The display panel includes multiple folded areas and multiple non-folded areas located on both sides of the folded areas.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

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