Flexible display panel and electronic device

Abstract

The present disclosure relates to a flexible display panel and an electronic device. The flexible display panel includes a flattened state and a bent state, wherein when the flexible display panel is in the bent state, the bent portion of the flexible display panel is bent; the flexible display panel includes a display layer, an adhesive layer, and a support layer, wherein the adhesive layer is bonded between the display layer and the support layer, and the support layer and / or the adhesive layer include a buffer opening, wherein the buffer opening is provided at least corresponding to the bent portion.

Description

Technical Field

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

[0002] With the development of flexible OLED display technology and the fact that foldable electronic devices combine the portability of ordinary electronic devices with the ultimate experience of large-screen display when unfolded, foldable electronic devices have gradually become an important trend in the development of mobile terminals and have become an important area of competition among major terminal manufacturers. Summary of the Invention

[0003] The present disclosure provides a flexible display panel and an electronic device to address the deficiencies in the related art.

[0004] According to a first aspect of an embodiment of the present disclosure, there is provided a flexible display panel, comprising a flattened state and a bent state, wherein when the flexible display panel is in the bent state, a bent portion of the flexible display panel is bent;

[0005] The flexible display panel includes a display layer, an adhesive layer and a support layer, the adhesive layer is bonded between the display layer and the support, the support layer and / or the adhesive layer includes a buffer opening, and the buffer opening is arranged at least corresponding to the bent portion.

[0006] Optionally, the support layer includes a piezoelectric film layer, and when the piezoelectric film layer is deformed, it drives the display layer to vibrate.

[0007] Optionally, the support layer further includes a buffer layer, and at least one of the buffer layer and the piezoelectric film layer is connected to the display layer via the adhesive layer;

[0008] Wherein, when the support layer includes the buffer opening, the buffer opening is provided in the piezoelectric film layer and / or the buffer layer.

[0009] Optionally, the buffer layer is disposed adjacent to the piezoelectric film layer, or the buffer layer is disposed around at least a portion of the piezoelectric film layer, or the piezoelectric film layer is disposed around at least a portion of the buffer layer.

[0010] Optionally, the flexible display panel further includes:

[0011] An electrostatic protection layer is connected to a side of the support layer away from the display layer.

[0012] Optionally, the support layer further includes a buffer layer, and both the buffer layer and the piezoelectric film layer are connected to the electrostatic protection layer and the display layer.

[0013] Optionally, the support layer further includes a buffer layer, the buffer layer is arranged around the piezoelectric film layer, the buffer layer is connected to the display layer and the electrostatic protection layer respectively, and the piezoelectric film layer is connected to the display layer and is separated from the electrostatic protection layer by a set distance;

[0014] The piezoelectric film layer, the electrostatic protection layer and the buffer layer form a sound cavity, or the piezoelectric film layer, the electrostatic protection layer, the display layer and the buffer layer form a sound cavity.

[0015] Optionally, the support layer further includes a buffer layer, which is disposed around the piezoelectric film layer, the buffer layer is connected to the display layer and the electrostatic protection layer respectively, and the piezoelectric film layer is connected to the electrostatic protection layer and is spaced a set distance from the display layer;

[0016] The piezoelectric film layer, the display layer, and the buffer layer form a sound cavity, or the piezoelectric film layer, the electrostatic protection layer, the display layer, and the buffer layer form a sound cavity.

[0017] Optionally, the electrostatic protection layer includes air holes.

[0018] According to a second aspect of the embodiments of the present disclosure, an electronic device is provided, comprising the flexible display panel as described in any one of the above embodiments.

[0019] The technical solutions provided by the embodiments of the present disclosure may have the following beneficial effects:

[0020] It can be seen from the above embodiments that in the present disclosure, at least one of the supporting layer and the adhesive layer may include a buffer opening, and the buffer opening is arranged corresponding to the bending part, so that when the bending part of the flexible display panel is bent, the internal stress of the flexible display panel can be buffered through the buffer opening, thereby reducing the probability of warping, cracking or deformation of the flexible display panel, which is beneficial to extending the service life of the flexible display panel.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0023] Figure 1 FIG. 1 is a schematic diagram showing a flexible display panel in a flattened state according to an exemplary embodiment.

[0024] Figure 2 yes Figure 1Schematic diagram of the flexible display panel in a bent state.

[0025] Figure 3 FIG. 1 is a schematic diagram showing another flexible display panel in a flattened state according to an exemplary embodiment.

[0026] Figure 4 This is one of the cross-sectional schematic diagrams of a display panel shown in an exemplary embodiment.

[0027] Figure 5 is a top view of a display panel according to an exemplary embodiment.

[0028] Figure 6 2 is a graph showing the relationship between pressure and deformation of the buffer foam and the piezoelectric film layer.

[0029] Figure 7 is a top view of another display panel according to an exemplary embodiment.

[0030] Figure 8 FIG. 1 is a top view of another display panel according to an exemplary embodiment.

[0031] Figure 9 This is one of the cross-sectional schematic diagrams of a display panel shown in an exemplary embodiment.

[0032] Figure 10 This is a second cross-sectional schematic diagram of a display panel shown in an exemplary embodiment.

[0033] Figure 11 This is a third cross-sectional schematic diagram of a display panel shown in an exemplary embodiment.

[0034] Figure 12 This is a fourth cross-sectional schematic diagram of a display panel shown in an exemplary embodiment.

[0035] Figure 13 The figure is a schematic structural diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0036] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0037] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0038] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0039] Figure 1 is a schematic diagram showing a flexible display panel 100 in a flattened state according to an exemplary embodiment. Figure 2 yes Figure 1 Schematic diagram of the flexible display panel 100 in a bent state. Figure 1 、 Figure 2 As shown, the flexible display panel 100 can be Figure 1 The flattened state shown and Figure 2 The bending states shown in FIG. Figure 1 、 Figure 2 As shown, the bending portion of the flexible display panel 100 can be bent, so that the angle between the plane portions on both sides of the bending portion changes. Of course, the flexible display panel 100 can be Figure 1 The flexible display panel 100 shown in FIG. Figure 1 After bending 180° clockwise as shown by the middle arrow, the display side is located at Figure 2 In other embodiments, the vertical direction may be rotated to other angles, which is not limited by the present disclosure. Alternatively, in some other embodiments, Figure 1 The flexible display panel 100 may also be arranged along the Figure 3 After rotating 180° counterclockwise as shown by the arrow, the display areas are arranged relative to each other.

[0040] The flexible display panel 100 may include a display layer 1, a protective layer 2, a support layer 3, and an adhesive layer 4. The protective layer 2 may include a flexible film protective layer, which resists impact from the front of the display panel 100 and protects the display panel 100 from dust. The adhesive layer 3 may be connected to the side of the display layer 1 away from the protective layer 2. The adhesive layer 4 may also be connected to the support layer 3. The adhesive layer 4 is located between the support layer 3 and the display layer 1. Figure 1 As shown, the support layer 3 may include a buffer opening 31, which is provided corresponding to the bent portion. When the bent portion of the flexible display panel 100 is bent, the buffer opening 31 can buffer the internal stress of the flexible display panel 100, thereby reducing the probability of warping, cracking, or deformation of the flexible display panel 100. The adhesive layer 4 may include a photoresist layer or other adhesive layer, which is not limited in this disclosure.

[0041] The cross section of the buffer opening 31 can be as follows Figure 1 The square shown, or, in some other embodiments, Figure 3 As shown, the cross-section of the buffer opening 31 may also be an arc. In other embodiments, the buffer opening 31 may also be a trapezoid or a triangle or other regular shapes. Of course, the buffer opening 31 may also be other irregular shapes. The shapes of multiple buffer openings 31 may be the same or different, and the present disclosure is not limited to this. In addition, in some other embodiments, the buffer opening 31 may also be provided at other positions of the support layer 3. For example, the buffer opening 31 may also be provided at other positions on the support layer 3 corresponding to the bending portion. In other embodiments, the buffer opening 31 may also be provided on the adhesive layer 4, or, in some other embodiments, a buffer opening may be provided on both the adhesive layer 4 and the support layer 3 at the same time to further enhance the stress buffering capability of the flexible display panel 100.

[0042] like Figure 4 As shown, the support layer 3 may be a piezoelectric film layer, and the buffer opening 31 may be provided at least in the region corresponding to the bent portion of the piezoelectric film layer. The piezoelectric film layer may be bonded to the display layer 1 via an adhesive layer 4. Thus, when power is applied to the piezoelectric film layer, the piezoelectric film layer may deform, thereby driving the display layer, the protective layer 2, and the adhesive layer 4 to vibrate, thereby enabling the flexible display panel 100 to produce sound. Furthermore, when a user touches or presses the flexible display panel 100, power may be applied to the piezoelectric film layer to drive the display layer 1 and the protective layer 2 to vibrate, thereby providing tactile feedback to the user's touch or press operation. The flexible display panel 100 may include an organic light-emitting display panel.

[0043] Further, still Figure 4As shown, the flexible display panel 100 may further include an electrostatic protection layer 5, which may be connected to the support layer 3, and the support layer 3 is disposed between the display layer 1 and the electrostatic protection layer 5, so that during the process of energizing the piezoelectric film layer, the electrostatic protection layer 5 can be used for electrostatic protection. The electrostatic protection layer 5 may include a copper foil layer, and still Figure 1 As shown, the electrostatic protection layer 5 may include vent holes 51 , through which the piezoelectric film layer and the display layer can be cooled.

[0044] It can be seen from the above embodiments that in the flexible display panel 100 disclosed herein, the display layer 1 can be supported by connecting the support layer 3 with the display layer 1, which is beneficial to improving the overall impact resistance of the flexible display panel 100. Since the support layer 3 may include a piezoelectric film layer, the vibration of the flexible display panel 100 can be achieved through the piezoelectric film layer, thereby achieving the purpose of vibration sound and tactile feedback.

[0045] Currently, in order to cushion the impact force from the back, the display panel configured in the electronic device usually sets a cushioning foam on the back of the display panel away from the display side. However, the cushioning foam has weak impact resistance and is easily deformed when subjected to external impact, which causes the display panel to become constipated. Generally speaking, when the impact force on the back is greater than 10N, the impact force acts on the display layer of the display panel through the cushioning foam, which is likely to cause pits to appear on the front of the display panel; and when the impact force on the back is greater than 300N, the impact force acts on the display layer of the display panel through the cushioning foam, which is likely to cause bad pixels to appear on the display panel and the display effect to deteriorate. Therefore, in one embodiment, if Figure 4 、 Figure 5 As shown, the support layer 3 may be a piezoelectric film layer, that is, the piezoelectric film layer may be connected to the display layer 1 via the adhesive layer 4. Figure 6 It can be seen from the pressure-deformation change curves of the buffer foam and the piezoelectric film layer that the piezoelectric film layer has a higher hardness and, under the action of the same pressure, the deformation of the piezoelectric film layer is smaller than the deformation of the buffer foam. Therefore, compared with the technical solution of using buffer foam for support in the related art, the display layer 1 is supported by the piezoelectric film layer in the present disclosure, which can improve the impact resistance of the flexible display panel 100 while realizing the vibration, sound and tactile feedback functions of the flexible display panel 100, reduce the risk of damage to the flexible display panel 100 under external impact force, and at the same time help to increase the area of the piezoelectric film layer, thereby increasing the area of the flexible display panel 100 that can perform tactile feedback.

[0046] In another embodiment, Figure 7 、 Figure 8As shown, the support layer 3 may include a piezoelectric film layer 32 and a buffer layer 33. At least one of the buffer layer 33 and the piezoelectric film layer 32 may be connected to the display layer 1 via an adhesive layer 3. The buffer layer 33 may include foam, so that the buffer layer 33 and the piezoelectric film layer 32 can jointly achieve a supporting function, while achieving the vibration sound and tactile feedback functions of the flexible display panel 100, reducing the material used in the piezoelectric film layer 32, which is beneficial to reducing costs. The buffer layer 33 and the piezoelectric film layer 32 may be as follows. Figure 7 The adjacent arrangement shown, or it can also be as shown Figure 8 As shown, the buffer layer 33 is arranged around the piezoelectric film layer 32, or, in other embodiments, the piezoelectric film layer 32 may be arranged around the buffer layer 33, or the buffer layer 33 may be arranged around a portion of the piezoelectric film layer 32, or the piezoelectric film layer 32 may be arranged around a portion of the buffer layer 33, and the present disclosure does not limit this.

[0047] In one embodiment, if Figure 9 、 Figure 10 As shown, the piezoelectric film layer 32 and the buffer layer 33 of the support layer 3 can be connected to the display layer 1 through the adhesive layer 4, that is, the buffer layer 33 can be arranged side by side with the piezoelectric film layer 32, and the thickness of the two can be basically the same, so that both can be connected to the display layer 1 and the electrostatic protection layer 5. Figure 10 The technical solution in Figure 9 According to the technical solution, the area of the piezoelectric film layer 32 is larger, so that the area of the tactile feedback region on the flexible display panel 100 is larger and the sound pressure level when the flexible display panel 100 makes a sound is higher.

[0048] In another embodiment, Figure 11As shown, the buffer layer 33 can be arranged around the piezoelectric film layer 32, and the buffer layer 33 can be connected to the display layer 1 through the adhesive layer 3. The buffer layer 33 can also be connected to the electrostatic protection layer 5 respectively, and the piezoelectric film layer 32 is connected to the electrostatic protection layer 5, and the piezoelectric film layer 32 and the display layer 1 can be separated by a set distance. When the piezoelectric film layer 32 vibrates, it can be transmitted to the electrostatic protection layer 5 and the buffer layer 33, and then transmitted to the display layer 1 and the protective layer 2 through the buffer layer 33. Since the electrostatic protection layer 5 drives the display layer 1 and the protective layer 2 in a light structure, the thrust of the electrostatic protection layer 5 to vibrate will be smaller than the thrust of the display layer 1 and the protective layer 2. Furthermore, when the piezoelectric film layer 32 is connected to each position of the area surrounded by the buffer layer 33 on the electrostatic protection layer 5, a sound cavity can be formed around the piezoelectric film layer 32, the buffer layer 33 and the display layer 1 to enhance the sound effect of the flexible display panel 100. Alternatively, in other embodiments, if the piezoelectric film layer 32 is not attached to part of the area surrounded by the buffer layer 33 on the electrostatic protection layer 5, the sound cavity can also be surrounded by the piezoelectric film layer 32, the buffer layer 33, the display layer 1 and the electrostatic protection layer 5.

[0049] In yet another embodiment, Figure 12 As shown, the buffer layer 33 can be arranged around the piezoelectric film layer 32, and the buffer layer 33 can be connected to the display layer 1 through the adhesive layer 4. The other side of the buffer layer 33 can be connected to the electrostatic protection layer 5, and the piezoelectric film layer 32 can be connected to the display layer 1 through the adhesive layer 4. There can be a set distance between the piezoelectric film layer 32 and the electrostatic protection layer 5. In this way, when the piezoelectric film layer 32 vibrates, since the piezoelectric film layer 32 is directly connected to the display layer 1, the vibration can be directly transmitted to the display layer 1, relative to the Figure 11 The technical solution can shorten the vibration transmission process and reduce losses. Moreover, when the piezoelectric film layer 32 is connected to each position of the area surrounded by the buffer layer 33 on the display layer 1, a sound cavity can be formed by the piezoelectric film layer 32, the buffer layer 33 and the electrostatic protection layer 5 to enhance the sound effect of the flexible display panel 100. Alternatively, in other embodiments, if the piezoelectric film layer 32 is not attached to part of the area surrounded by the buffer layer 33 on the display layer 1, the sound cavity can also be surrounded by the piezoelectric film layer 32, the buffer layer 33, the display layer 1 and the electrostatic protection layer 5.

[0050] In each of the above embodiments, a first heat dissipation layer (not shown) may be further provided in the flexible display panel 100. The first heat dissipation layer may be provided between the support layer 3 and the electrostatic protection layer 5, specifically between the buffer layer 33 and the electrostatic protection layer 5, or between the piezoelectric film layer 32 and the electrostatic protection layer 5, or a first heat dissipation layer may be provided both between the buffer layer 33 and the electrostatic protection layer 5 and between the piezoelectric film layer 32 and the electrostatic protection layer 5. The present disclosure does not impose any restrictions on this.

[0051] Similarly, a second heat dissipation layer (not shown) can be provided between the support layer 3 and the display layer 1. This second heat dissipation layer can be provided between the buffer layer 33 and the display layer 1, or between the piezoelectric film layer 32 and the display layer 1, or between both the buffer layer 33 and the display layer 1 and the piezoelectric film layer 32 and the display layer 1. The specific design can be as needed and is not limited in this disclosure. The first heat dissipation layer and the second heat dissipation layer can include graphite layers.

[0052] Based on the flexible display panel 100 described in the above embodiments, the present disclosure further provides a flexible display panel 100. Figure 13 The electronic device 200 shown can be configured with the flexible display panel 100 described in any of the above embodiments. The electronic device 200 can include a folded state and an unfolded state to provide both the visual effect of a large-screen display and the convenience of portability. The flexible display panel 100 can provide sound and tactile feedback functions of the electronic device 200. The electronic device 200 can include mobile phone terminals, tablet terminals, smart home devices, and the like.

[0053] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0054] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A flexible display panel, characterized in that: The flexible display panel has a flattened state and a bent state, and when the flexible display panel is in the bent state, the bent portion of the flexible display panel is bent; The flexible display panel includes a display layer, an adhesive layer and a support layer, wherein the adhesive layer is bonded between the display layer and the support layer, and the support layer and / or the adhesive layer includes a buffer opening, and the buffer opening is provided at least corresponding to the bent portion; The support layer includes a piezoelectric film layer and a buffer layer. The piezoelectric film layer and the buffer layer are arranged side by side on the non-display side of the display layer, and at least one of them is connected to the display layer.

2. The flexible display panel according to claim 1, wherein: When the piezoelectric film layer is deformed, the display layer is driven to vibrate.

3. The flexible display panel according to claim 2, wherein: When the supporting layer includes the buffer opening, the buffer opening is provided in the piezoelectric film layer and / or the buffer layer.

4. The flexible display panel according to claim 3, wherein: The buffer layer is disposed adjacent to the piezoelectric film layer, or the buffer layer is disposed around at least a portion of the piezoelectric film layer, or the piezoelectric film layer is disposed around at least a portion of the buffer layer.

5. The flexible display panel according to claim 2, wherein: The flexible display panel further includes: An electrostatic protection layer is connected to a side of the support layer away from the display layer.

6. The flexible display panel according to claim 5, wherein: The buffer layer and the piezoelectric film layer are both connected to the electrostatic protection layer and the display layer.

7. The flexible display panel according to claim 5, wherein: The buffer layer is arranged around the piezoelectric film layer, the buffer layer is connected to the display layer and the electrostatic protection layer respectively, and the piezoelectric film layer is connected to the display layer and is separated from the electrostatic protection layer by a set distance; The piezoelectric film layer, the electrostatic protection layer and the buffer layer form a sound cavity, or the piezoelectric film layer, the electrostatic protection layer, the display layer and the buffer layer form a sound cavity.

8. The flexible display panel according to claim 6, wherein: The buffer layer is arranged around the piezoelectric film layer, the buffer layer is connected to the display layer and the electrostatic protection layer respectively, and the piezoelectric film layer is connected to the electrostatic protection layer and is separated from the display layer by a set distance; The piezoelectric film layer, the display layer, and the buffer layer form a sound cavity, or the piezoelectric film layer, the electrostatic protection layer, the display layer, and the buffer layer form a sound cavity.

9. The flexible display panel according to claim 5, wherein: The electrostatic protection layer includes air holes.

10. An electronic device, characterized in that: The flexible display panel comprises the flexible display panel as claimed in any one of claims 1 to 9.

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