Display panel and electronic device

Abstract

Embodiments of the present disclosure provide a display panel and an electronic device. The display panel comprises a sliding display area, a fixed display area connected with the sliding display area, and the sliding display area and the fixed display area are supported by a first support structure layer. The fixed display area is further provided with a buffer structure layer, the buffer structure layer is connected with the first support structure layer and is arranged on a side of the first support structure layer away from the display panel. The buffer structure layer comprises a plurality of areas connected in sequence, the plurality of areas respectively have a plurality of different rigidities, and the rigidity of the area gradually increases from a first area to an Nth area in a first direction in which the first area and the Nth area are located. The first area is arranged in a predetermined range of an area junction position, the first direction is a direction from the area junction position to a boundary position of the fixed display area corresponding to the display panel, and N is a positive integer greater than 1. Embodiments of the present disclosure solve the problem of stress concentration and the like at the area junction position.

Description

Technical Field

[0001] This disclosure relates to the field of displays, and in particular to a display panel and an electronic device. Background Technology

[0002] Currently, mobile phone designs are gradually moving towards rollable designs, making product styles more flexible. However, with rollable display panels being unfolded and rolled up repeatedly, stress concentration can easily occur at the boundary between the rolling area and the main support area. After unfolding, defects such as mold marks, film peeling, and wrinkles are likely to occur. Summary of the Invention

[0003] In view of this, the present disclosure provides a display panel and electronic device to solve the following problems of the prior art: when a sliding display panel is repeatedly unfolded and rolled up, stress concentration is likely to occur at the boundary between the rolling area and the main support area, and mold marks, film peeling and wrinkles are likely to occur after unfolding.

[0004] On one hand, this disclosure provides a display panel, including: a scrollable display area and a fixed display area connected to the scrollable display area; the scrollable display area and the fixed display area are supported by a first support structure layer; the fixed display area is further provided with a buffer structure layer, the buffer structure layer is connected to the first support structure layer and is disposed on the side of the first support structure layer away from the display panel; the buffer structure layer includes a plurality of regions connected in sequence, each region having a plurality of different stiffnesses, the stiffness of the regions increasing sequentially from the first region to the Nth region in a first direction, wherein the first region is disposed within a predetermined range at the region boundary position, the first direction is the direction from the region boundary position to the boundary position of the display panel corresponding to the fixed display area, and N is a positive integer greater than 1.

[0005] In some embodiments, the buffer structure layer includes: a plurality of support structure layers, each of which extends from the boundary position of the display panel corresponding to the fixed display area toward the first area, with the extension length of each support structure layer decreasing sequentially in the direction away from the first support structure layer, and the sum of the total thickness of the plurality of support structure layers equal to a predetermined thickness.

[0006] In some embodiments, the buffer structure layer includes: a second support structure layer and a third support structure layer, wherein the second support structure layer is connected to the first support structure layer via a first double-sided adhesive layer, and the third support structure layer is connected to the second support structure layer via a second double-sided adhesive layer; the first extension length of the second support structure is greater than the second extension length of the third support structure, and the first extension length is the same as the length of the support region.

[0007] In some embodiments, the buffer structure layer includes: a second support structure layer, a third support structure layer, and a fourth support structure layer; the second support structure layer is connected to the first support structure layer via a first double-sided adhesive layer, the third support structure layer is connected to the second support structure layer via a second double-sided adhesive layer, and the fourth support structure layer is connected to the third support structure layer via a third double-sided adhesive layer; the first extension length of the second support structure is greater than the second extension length of the third support structure, the second extension length of the third support structure is greater than the third extension length of the fourth support structure, and the first extension length is the same as the length of the support region.

[0008] In some embodiments, the buffer structure layer includes: a second support structure layer, a third support structure layer, and a flexible tissue layer; the flexible tissue layer is disposed in the first region and connected to the first support structure layer; the second support structure layer is disposed in the second region and connected to the first support structure layer via a first double-sided adhesive layer; the flexible tissue layer and the second support structure layer are connected to the third support structure layer via a second double-sided adhesive layer.

[0009] In some embodiments, the total thickness of the second support structure layer and the first double-sided adhesive layer is the same as the thickness of the flexible tissue layer.

[0010] In some embodiments, the first end of the flexible tissue layer is connected to the second end of the second support structure layer; both the second support structure layer and the third support structure layer extend from the boundary position of the display panel corresponding to the fixed display area towards the first area, with the first extension length of the second support structure layer being less than the second extension length of the third support structure layer, the second extension length being the same as the length of the support area, and the sum of the third extension length of the flexible tissue layer and the first extension length being the same as the second extension length.

[0011] In some embodiments, the flexible tissue layer is made of foam.

[0012] In some embodiments, the system further includes, in sequence: a first optical adhesive layer, a polarizer, a display module, and a second optical adhesive layer, wherein the second optical adhesive layer is connected to the first support structure layer.

[0013] On the other hand, embodiments of this disclosure provide an electronic device, including: a display panel as described in any embodiment of this disclosure.

[0014] In this embodiment, a support structure with a buffer layer is designed on the back of the fixed display area. The buffer layer is divided into multiple areas. The area near the boundary of the area has lower stiffness, while the area near the boundary of the display panel of the fixed display area has higher stiffness. As a result, the stress at the boundary of the area is significantly reduced when the display panel is rolled up, and the transition is smooth, avoiding stress concentration at the boundary of the area, which can cause mold marks and peeling and other defects. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the flattened state of a scroll display panel provided for related technologies;

[0017] Figure 2 A cross-sectional structural diagram of a roll-up display panel provided for related technologies;

[0018] Figure 3 A schematic diagram showing the crease pattern formed at the boundary between the rolling area and the main support area, provided for related technologies;

[0019] Figure 4 A schematic diagram illustrating the forces acting on a roll-up display panel in the relevant technology.

[0020] Figure 5 Schematic cross-sectional structure of the display panel provided in the embodiments of this disclosure Figure 1 ;

[0021] Figure 6 A schematic diagram of the force applied to the rolled-up state of the display panel provided in this embodiment of the present disclosure. Figure 1 ;

[0022] Figure 7 Schematic cross-sectional structure of the display panel provided in the embodiments of this disclosure Figure 2 ;

[0023] Figure 8 A schematic diagram of the force applied to the rolled-up state of the display panel provided in this embodiment of the present disclosure. Figure 2 .

[0024] Figure label:

[0025] 12 - Sliding display area; 13 - Fixed display area;

[0026] 1-Covering film, 2-First optical adhesive layer, 3-Polarizing film, 4-Display module, 5-Second optical adhesive layer, 6-First support structure layer, 7-First double-sided adhesive layer, 8-Second support structure layer;

[0027] 88 - Buffer structure layer, 11 - Flexible tissue layer, 14 - Crease imprint generated at the boundary of the region;

[0028] 51-Second support structure layer, 52-Third support structure layer, 53-Fourth support structure layer;

[0029] 41-First double-sided adhesive layer, 42-Second double-sided adhesive layer, 43-Third double-sided adhesive layer;

[0030] A - First area, B - Second area, C - Third area. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0033] To keep the following description of the embodiments of this disclosure clear and concise, detailed descriptions of known functions and known components are omitted.

[0034] like Figure 1 The image shows the flattened state of a sliding display panel in related technologies, including a rolling area (i.e., the sliding display area) and a main support area (i.e., the fixed display area). Figure 1 In the middle, 12 is the rolling area, and 13 is the main support area.

[0035] like Figure 2 The diagram shown is a cross-sectional view of the slide-out display panel in its rolled-up state. The rolling area has weak support strength, while the main support area has strong support strength, ensuring that the slide-out display module can be used normally after being rolled up. Figure 2 In the diagram, 1 is the cover film, 2 is OCA1 (first optical adhesive layer), 3 is POL (polarizer), 4 is PNL (display module), 5 is OCA2 (second optical adhesive layer), 6 is the sliding SUS1 (first support structure layer), 7 is PSA (double-sided adhesive layer), and 8 is the main support SUS2 (second support structure layer).

[0036] like Figure 3 The diagram shows a crease or mold mark at the boundary between the rolling area and the main support area of ​​the sliding display panel. It can be seen that there is an uneven transition in support strength at the boundary between the rolling area and the main support area. After long-term use at the boundary, defects such as wrinkles, peeling, and mold marks are likely to occur. Figure 3 In the middle, 14 represents the crease imprint formed at the junction of the rolling area and the main support area. The force diagram of the rolled-up display panel can be referenced. Figure 4 .

[0037] To address the technical problems associated with the aforementioned sliding display panels, this disclosure provides a display panel, the cross-sectional structure of which is shown below. Figure 5 As shown, it includes:

[0038] Sliding display area, and fixed display area connected to the sliding display area;

[0039] The sliding display area and the fixed display area are supported by a first support structure layer;

[0040] The fixed display area is further provided with a buffer structure layer 88, which is connected to the first support structure layer and is disposed on the side of the first support structure layer away from the display panel;

[0041] The buffer structure layer includes multiple regions connected in sequence, each region having a different stiffness. The stiffness of the regions increases sequentially from the first region to the Nth region in a first direction. The first region is located within a predetermined range at the region boundary. The first direction is the direction from the region boundary to the boundary of the display panel corresponding to the fixed display area. N is a positive integer greater than 1.

[0042] In this embodiment, a support structure with a buffer layer is designed on the back of the fixed display area. The buffer layer is divided into multiple areas. The area near the boundary of the area has lower stiffness, while the area near the boundary of the display panel of the fixed display area has higher stiffness. As a result, the stress at the boundary of the area is significantly reduced when the display panel is rolled up, and the transition is smooth, avoiding stress concentration at the boundary of the area, which can cause mold marks and peeling and other defects.

[0043] Figure 5 The buffer structure layer of the display panel shown is exemplified by having three stepped layers. Figure 5 The buffer structure layer includes a second support structure layer 51 (SUS2), a third support structure layer 52 (SUS23), and a fourth support structure layer 53 (SUS4). The second support structure layer is connected to the first support structure layer via a first double-sided adhesive layer 41 (PSA1), the third support structure layer is connected to the second support structure layer via a second double-sided adhesive layer 42 (PSA2), and the fourth support structure layer is connected to the third support structure layer via a third double-sided adhesive layer 43 (PSA3). The first extension length of the second support structure is greater than the second extension length of the third support structure, the second extension length of the third support structure is greater than the third extension length of the fourth support structure, and the first extension length is the same as the length of the support area.

[0044] Figure 5 The buffer structure layer of the display panel is divided into three areas. The first area A is the first step part connected to the first support structure layer (i.e., part of the second support structure layer), the second area B is the second step part connected to the second support structure layer (i.e., part of the third support structure layer), and the third area C is the third step part connected to the third support structure layer (i.e., the entire fourth support structure layer).

[0045] Figure 6 Showing for Figure 5 A diagram illustrating the force exerted on the rolled-up display panel, for comparison. Figure 4 It is evident that the stress at the boundary of the regions is significantly reduced, resulting in a smooth transition and avoiding stress concentration at the boundary, which could lead to mold marks and peeling.

[0046] Figure 5This is merely an example and does not constitute a limitation on the embodiments disclosed herein. For a stepped buffer structure layer, those skilled in the art can design more steps (i.e., support structure layers). That is, the buffer structure layer may include multiple support structure layers, each extending from the boundary position of the display panel corresponding to the fixed display area towards the first area. The extension length of each support structure layer decreases sequentially in the direction away from the first support structure layer. It should be noted that the sum of the total thicknesses of the multiple support structure layers is equal to a predetermined thickness. Figure 1 The sum of the thicknesses of the double-sided adhesive layer and the second support structure layer, i.e. the maximum thickness of the entire buffer structure layer, is consistent with the thickness of the existing main support structure (double-sided adhesive layer and second support structure layer).

[0047] Of course, those skilled in the art can also design fewer than three steps, i.e., two steps. In this case, the buffer structure layer only needs to include a second support structure layer and a third support structure layer. The second support structure layer is connected to the first support structure layer through a first double-sided adhesive layer, and the third support structure layer is connected to the second support structure layer through a second double-sided adhesive layer. The first extension length of the second support structure is greater than the second extension length of the third support structure, and the first extension length is the same as the length of the support area. Correspondingly, the buffer structure layer of the display panel is divided into two areas: the first area is the first step portion connected to the first support structure layer (i.e., part of the second support structure layer), and the second area is the second step portion connected to the second support structure layer (i.e., the entire third support structure layer).

[0048] The cross-sectional structure of the aforementioned display panel can also be as follows: Figure 7 As shown, the buffer structure layer includes: a second support structure layer, a third support structure layer, and a flexible tissue layer 11; the flexible tissue layer is disposed in the first region and connected to the first support structure layer; the second support structure layer is disposed in the second region and connected to the first support structure layer through a first double-sided adhesive layer; the flexible tissue layer and the second support structure layer are connected to the third support structure layer through a second double-sided adhesive layer.

[0049] To ensure the flatness of the panel, the total thickness of the second support structure layer and the first double-sided adhesive layer is preferably set to be the same as the thickness of the flexible tissue layer.

[0050] In a specific configuration, the first end of the flexible tissue layer is connected to the second end of the second support structure layer (i.e., the flexible tissue layer and the second support structure layer are connected at their ends); both the second and third support structure layers extend from the boundary position of the display panel corresponding to the fixed display area towards the first area, with the first extension length of the second support structure layer being less than the second extension length of the third support structure layer. The second extension length is the same as the length of the support area, and the sum of the third extension length of the flexible tissue layer and the first extension length is the same as the second extension length. The material of the flexible tissue layer is preferably foam.

[0051] Compared to Figure 5 In other words, Figure 7 The buffer structure layer of the display panel is divided into two areas: the first area is where the flexible tissue layer is located, the second area is where the second support structure layer is located, and the third support structure layer covers both the first and second areas.

[0052] like Figure 8 As shown, it demonstrates the... Figure 7 A diagram illustrating the force exerted on the rolled-up display panel, for comparison. Figure 4 It is evident that the stress at the boundary of the regions is significantly reduced, resulting in a smooth transition and avoiding stress concentration at the boundary, which could lead to mold marks and peeling.

[0053] This disclosure also provides an electronic device, which includes the display panel described in the above embodiments. The structure of the display panel will not be described in detail here.

[0054] Furthermore, although exemplary embodiments have been described herein, their scope includes any and all embodiments based on this disclosure that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, and such examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the full scope of the following claims and their equivalents.

[0055] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more thereof) can be used in combination with each other. Other embodiments may be used by those skilled in the art upon reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the disclosure. This should not be construed as an intention that a feature of the disclosure that is not claimed is necessary for any claim. Rather, the subject matter of this disclosure may be less than all the features of a particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is an independent, separate embodiment, and these embodiments are contemplated to be combined with each other in various combinations or arrangements. The scope of this disclosure should be determined by reference to the appended claims and the full scope of their equivalents.

[0056] The foregoing has provided a detailed description of several embodiments of this disclosure. However, this disclosure is not limited to these specific embodiments. Those skilled in the art can make various variations and modifications based on the concept of this disclosure, and all such variations and modifications should fall within the scope of protection claimed by this disclosure.

Claims

1. A display panel, characterized in that, include: Sliding display area, and fixed display area connected to the sliding display area; The sliding display area and the fixed display area are supported by a first support structure layer; The fixed display area is further provided with a buffer structure layer, which is connected to the first support structure layer and is disposed on the side of the first support structure layer away from the display panel; The buffer structure layer includes multiple regions connected in sequence, each region having multiple different stiffnesses. From the first region to the first direction where the Nth region is located, the stiffness of the regions increases sequentially. The first region is located within a predetermined range at the region boundary position. The first direction is the direction from the region boundary position to the boundary position of the display panel corresponding to the fixed display area. N is a positive integer greater than 1. The buffer structure layer includes multiple support structure layers, each of which extends from the boundary position of the display panel corresponding to the fixed display area towards the first area, with the extension length of each support structure layer decreasing sequentially in the direction away from the first support structure layer, and the sum of the total thickness of the multiple support structure layers equal to a predetermined thickness.

2. The display panel as described in claim 1, characterized in that, The buffer structure layer includes a second support structure layer and a third support structure layer. The second support structure layer is connected to the first support structure layer through a first double-sided adhesive layer, and the third support structure layer is connected to the second support structure layer through a second double-sided adhesive layer. The first extension length of the second support structure layer is greater than the second extension length of the third support structure layer, and the first extension length is the same as the length of the support area.

3. The display panel as described in claim 1, characterized in that, The buffer structure layer includes: a second support structure layer, a third support structure layer, and a fourth support structure layer; the second support structure layer is connected to the first support structure layer via a first double-sided adhesive layer, the third support structure layer is connected to the second support structure layer via a second double-sided adhesive layer, and the fourth support structure layer is connected to the third support structure layer via a third double-sided adhesive layer; the first extension length of the second support structure layer is greater than the second extension length of the third support structure layer, the second extension length of the third support structure layer is greater than the third extension length of the fourth support structure layer, and the first extension length is the same as the length of the support area.

4. The display panel as described in claim 1, characterized in that, The buffer structure layer includes: a second support structure layer, a third support structure layer, and a flexible tissue layer; The flexible tissue layer is disposed in the first region and connected to the first support structure layer; The second support structure layer is disposed in the second region and is connected to the first support structure layer by the first double-sided adhesive layer; The flexible tissue layer and the second support structure layer are connected to the third support structure layer through a second double-sided adhesive layer.

5. The display panel as described in claim 4, characterized in that, The total thickness of the second support structure layer and the first double-sided adhesive layer is the same as the thickness of the flexible tissue layer.

6. The display panel as described in claim 5, characterized in that, The first end of the flexible tissue layer is connected to the second end of the second support structure layer; Both the second support structure layer and the third support structure layer extend from the boundary position of the display panel corresponding to the fixed display area towards the first area. The first extension length of the second support structure layer is less than the second extension length of the third support structure layer. The second extension length is the same as the length of the support area. The sum of the third extension length of the flexible tissue layer and the first extension length is the same as the second extension length.

7. The display panel as described in claim 4, characterized in that, The flexible tissue layer is made of foam.

8. The display panel as claimed in any one of claims 1 to 7, characterized in that, It also includes, in sequence: a first optical adhesive layer, a polarizer, a display module, and a second optical adhesive layer, wherein the second optical adhesive layer is connected to the first support structure layer.

9. An electronic device, characterized in that, include: The display panel according to any one of claims 1 to 8.

Images