Display panel and display device

Abstract

This application discloses a display panel and a display device, wherein the display panel comprises: a display screen and a flexible circuit board; the display screen comprises a screen body, a bending portion, and a binding area, wherein the binding area is bent to the back of the screen body through the bending portion and the flexible circuit board; wherein the flexible circuit board covers at least a portion of the edge of the binding area, and the width of the flexible circuit board along a first direction is greater than the width of the binding area along the first direction; the first direction is perpendicular to the arrangement and extension direction of the screen body, the bending portion, and the binding area. This application makes the connection process more stable by setting the two sides of the flexible circuit board in the first direction to be wider than the binding area, thereby improving the product yield.

Description

Technical Field

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

[0002] Currently, display products are connected to flexible circuit boards (FPCBs) via the display's bonding area. The process of bending the FPCB to the back of the display can lead to concentrated stress, causing delamination between the upper and lower layers. This can cause display failure and impact production line yields. Summary of the Invention

[0003] The present application provides a display panel and a display device to solve the problem that when the display screen of the existing display panel is connected to the flexible circuit board, the display screen bends when the binding area of ​​the display screen is connected to the flexible circuit board, and is easily delaminated due to stress.

[0004] In order to solve the above technical problems, a technical solution adopted by the present application is to provide a display panel and a display device, wherein the display panel includes: a display screen and a flexible circuit board;

[0005] The display screen includes a screen body, a bending portion, and a binding area, wherein the binding area is bent to the back side of the screen body through the bending portion;

[0006] The width of the flexible circuit board along the first direction is greater than the width of the binding area along the first direction; the first direction is the extension direction of the short side of the screen body.

[0007] Optionally, widths of both sides of the flexible circuit board along the first direction exceed the binding area by at least 3 mm.

[0008] Optionally, a portion of the flexible circuit board that extends beyond an edge of the binding area along the first direction is fixed to the back of the screen by conductive adhesive.

[0009] Optionally, a portion of the flexible circuit board that exceeds the edge of the binding area is provided with metal, and the metal is located on a side of the flexible circuit board close to the screen body. The metal contacts the conductive adhesive to be fixed to the back of the screen body.

[0010] Optionally, the portion of the flexible circuit board that extends beyond the edge of the binding area is provided with metal, and the metal is located on the side of the flexible circuit board facing away from the screen body. The portion of the flexible circuit board that extends beyond the edge of the binding area is bent to the back of the binding area and fixed to the back of the screen body by conductive glue.

[0011] Optionally, the flexible circuit board includes a first sub-circuit board and a second sub-circuit board arranged along the second direction, wherein the first sub-circuit board and the second sub-circuit board are integrally formed; and a flattened width of the first sub-circuit board along the first direction is greater than a flattened width of the second sub-circuit board;

[0012] The second direction is perpendicular to the first direction.

[0013] Optionally, along the first direction, a flattened width of the first sub-circuit board is at least twice a width of the binding area.

[0014] Optionally, a padding block is provided between the binding area and the back surface of the screen body, and a portion of the flexible circuit board that exceeds the edge of the binding area wraps around a side surface of the padding block.

[0015] Optionally, a through hole is provided on the raising block to enhance the heat dissipation effect of the screen body.

[0016] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a display device, wherein the display device includes the display panel described in any one of the above embodiments.

[0017] The beneficial effects of this application are as follows: In the solution of this application, the width of the flexible circuit board in the first direction is extended so that it is much larger than the width of the binding area. This allows the portion of the flexible circuit board that is left over relative to the binding area, and the portion of the flexible circuit board that extends beyond the edge of the binding area, to be fixed to the back of the screen using conductive adhesive. This protects the screen from stress-induced delamination and strengthens the connectivity of the grounding point. Alternatively, the first sub-circuit board can be bent to the back of the screen, thereby replacing the padding function of the padding block, thereby eliminating the need for the padding block while still reducing the possibility of stress-induced delamination of the screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort, among which:

[0019] Figure 1 This is a schematic diagram of the folding of the first embodiment of the display panel of the present application;

[0020] Figure 2 is a flattened schematic diagram of the first embodiment of the display panel of the present application;

[0021] Figure 3is a side view of the first embodiment of the display panel of the present application in a folded state;

[0022] Figure 4 is a flattened schematic diagram of a second embodiment of the display panel of the present application;

[0023] Figure 5 This is a schematic diagram of the folding of the second embodiment of the display panel of the present application;

[0024] Figure 6 is a side view of the second embodiment of the display panel of the present application in a folded state;

[0025] Figure 7 It is a structural schematic diagram of an embodiment of a display device provided by the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0027] The terms used in the examples of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a," "the," and "the" used in the examples of this application and the appended claims are also intended to include plural forms. Unless otherwise clearly indicated above, "a plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0028] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0029] It should be understood that the terms "comprises," "comprising," or any other variations used herein are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the folding of the first embodiment of the display panel 1 of the present application. In this first embodiment, the display panel 1 includes a display screen 2 and a flexible circuit board 3. The display screen 2 includes a screen body 201, a bend 202, and a binding area 203. The width of the flexible circuit board 3 along a first direction X is greater than the width of the binding area 203 along the first direction X, where the first direction X is perpendicular to the long side of the display screen 2 when it is flattened. By binding the flexible circuit board 3 to the display screen 2, other electronic devices are bound and electrically connected to the flexible circuit board 3, thereby driving the display panel 1 to function normally.

[0031] To address the issue of delamination of the bent portion 202 of the screen 201 due to stress, this embodiment designs the width of the flexible circuit board 3 along the first direction X to be greater than the width of the binding area 203 along the first direction X. This allows the flexible circuit board 3 to have an excess width relative to both ends of the binding area 203. During binding, both ends of the flexible circuit board 3 are bonded to the back panel of the screen 201, and the flexible circuit board 3 covers at least a portion of the side of the binding area 203 facing away from the screen 201. First, the bonding of the flexible circuit board 3 to the back panel of the screen 201 exerts a certain amount of pressure on the binding area 203 between the screen 201 and the flexible circuit board 3. This pressure is generated by the flexible circuit board 3 abutting against the binding area 203, thus preventing it from falling off. By increasing the area of ​​the binding connection, the stability of the connection between the flexible circuit board 3 and the display screen 2 is improved, thereby addressing the issue of delamination of the screen 201 due to stress.

[0032] Please refer to Figure 2 and Figure 3 , Figure 2 is a flattened schematic diagram of the first embodiment of the display panel of the present application, Figure 3 This is a side view of the first embodiment of the display panel of the present application in a folded state. In this embodiment, one side of the narrow side of the screen body 201 is connected to the bent portion 202. The display panel 1 has two states: a flattened state and a folded state. When the display screen 2 and the flexible circuit board 3 are in the flattened state, they are located in the same plane. When folded, the display screen 2 and the flexible circuit board 3 overlap, and the binding area 203 is bent to the back side of the screen body 201. At this time, one side of the binding area 203 is bonded with a spacer 4, and the other side of the binding area 203 facing away from the spacer 4 is connected to the flexible circuit board 3. The binding area 203 is used to connect with the flexible circuit board 3 to transmit information. The bent portion 202 can change the placement of the flexible circuit board 3, so that the flexible circuit board 3 is located on the back side of the screen body 201 when in use, thereby achieving the effect of integrated space saving.

[0033] The bending portion 202 needs to be flipped 180 degrees to position the binding area 203 on the back of the screen 201. Since the bending degree of the bending portion 202 is limited, stress fracture will occur when the bending limit is reached. To protect the bending portion 202 from damage during the flipping process, a padding block 4 is provided. The padding block 4 is in the form of a thin sheet, and the provision of the padding block 4 reduces the bending degree of the bending portion 202. A through hole is provided in the padding block 4. After long-term use, the display panel 1 heats up. The provision of the through hole can improve the heat dissipation effect and also reduce the impact on the display panel 1 when it is impacted.

[0034] Adhesive is applied to both surfaces of the spacer 4, which is located between the binding area 203 and the screen 201. The spacer 4 adheres the binding area 203 to the screen 201 with adhesive. This reduces gaps at the connection point and enhances the stability between the flexible circuit board 3, the spacer 4, and the binding area 203 during connection, thereby reducing the possibility of delamination of the screen 201 due to stress.

[0035] The sides of the raised block 4 are open and unprotected. During actual use, liquids can penetrate through these sides, causing corrosion of the circuits and further display abnormalities on the display screen 2. In this application, the width of the flexible circuit board 3 along the first direction X is designed to be greater than the width of the binding area 203 along the first direction X. During the binding process, the extra portions of the flexible circuit board 3 on both sides compared to the binding area 203 can be used to process the connection between the sides of the raised block 4, thereby achieving a better sealing treatment for the sides of the raised block 4.

[0036] Specifically, after the flexible circuit board 3 is bent, the portion of the flexible circuit board 3 that extends beyond the edge of the binding area 203 wraps around the side of the spacer 4. Finally, the end of the flexible circuit board 3 that extends beyond the edge of the binding area 203 is connected to the back of the screen 201. This improves stability during operation and further enhances the sealing performance of the product at the connection, reducing the possibility of liquid intrusion into the binding area 203 from the connection, reducing the product failure rate, and thus improving the user experience.

[0037] When the flexible circuit board 3 is connected to the binding area 203, the width of both sides of the flexible circuit board 3 along the first direction X exceeds the binding area 203 by at least three millimeters, and can also be 3.6 millimeters, four millimeters, etc., with three millimeters being preferred. The reason for preferring three millimeters is that it was discovered during operation that when both sides of the flexible circuit board 3 extend at least three millimeters beyond the binding area 203, it is possible to simultaneously bond the two sides of the spacer block 4 to the back of the screen 201, thereby reducing the length of the flexible circuit board 3 along the first direction and further saving production costs. Since the two sides of the flexible circuit board 3 extend beyond three millimeters, the flexible circuit board 3 can wrap around the two sides of the spacer block 4 during connection, making the connection between the flexible circuit board 3 and the binding area 203 more secure during use and reducing the possibility of delamination.

[0038] Specifically, since the flexible circuit board 3 is usually in the form of a thin sheet and the display panel 1 is a high-precision device, the present applicant has found through actual operation that, generally, if the flexible circuit board 3 extends three millimeters beyond one end of the binding area 203, it can be bonded to the back panel of the screen 201 at the same time as it is bonded to the pad 4. Based on the sufficient bonding strength between the flexible circuit board 3 and the back panel of the screen 201, it is possible to further save raw materials while protecting the connection strength, thereby saving manufacturing costs.

[0039] The portions on both sides of the flexible circuit board 3 that extend beyond the binding area 203 and are close to the back of the screen 201 are metal areas, which are bonded and fixed to the back of the screen 201 via conductive adhesive. The two opposite sides of the spacer block 4 are bonded to the back of the screen 201 and the flexible circuit board 3, respectively. In order to enhance the connectivity of the grounding point and reduce the possibility of electrostatic discharge, the present application provides a metal area on the flexible circuit board 3 that is connected to the back panel of the screen 201, wherein a copper foil layer is connected to the back of the screen 201. The metal area on the flexible circuit board 3 and the copper foil layer on the screen 201 are connected via conductive adhesive, thereby connecting the flexible circuit board 3 to the metal area, thereby enhancing the connectivity of the grounding point in the display panel 1 and reducing the possibility of electrostatic discharge.

[0040] Please refer to Figure 4 and Figure 5 , Figure 4 is a flattened schematic diagram of the second embodiment of the display panel of the present application, Figure 5FIG2 is a schematic diagram of the folding of the second embodiment of the display panel of the present application. In the second embodiment, the flexible circuit board 3 includes a first sub-circuit board 301 and a second sub-circuit board 302, and the first sub-circuit board 301 and the second sub-circuit board 302 are formed in one plate. In the flattened state, the width of the first sub-circuit board 301 along the first direction X is greater than the width of the second sub-circuit board 302 along the first direction X, and the width of the second sub-circuit board 302 along the first direction X is greater than the width of the binding area 203 along the first direction X. The first sub-circuit board 301 and the binding area 203 are in an overlapping state and connected to each other; in the folded state, the flexible circuit board 3 is first flipped to the back of the screen body 201, and then the parts of the first sub-circuit board 301 that exceed the binding area 203 on both sides along the first direction X are bent toward the back of the screen body 201, and after bending, they are folded toward the binding area 203. After bending, the bent part of the first sub-circuit board 301 abuts against the back of the screen body 201, and the first sub-circuit board 301 is connected to the back of the screen body 201 through conductive glue.

[0041] In order to solve the delamination phenomenon caused by the stress on the screen body 201, the flexible circuit board 3 is split into two parts, a first sub-circuit board 301 and a second sub-circuit board 302. The two sides of the first sub-circuit board 301 are bent and then abutted against the circuit board, so that the binding area 203 can be supported, replacing the raising block 4 for raising, thereby reducing the manufacturing cost.

[0042] First, the arrangement and extension direction of the screen body 201, the bent portion 202, and the binding area 203 is assumed to be the second direction Y. The width of the first sub-circuit board 301 in the second direction Y is the same as the width of the binding area 203 in the second direction Y. The first sub-circuit board 301 and the binding area 203 satisfy the following condition: the width of the first sub-circuit board 301 in the first direction X is at least twice the width of the binding area 203 in the first direction X.

[0043] To improve the stability of the first sub-circuit board 301 when supporting the binding area 203, please refer to Figure 6 , Figure 6This is a side view of the second embodiment of the display panel of the present application in the folded state. In this embodiment, since the width of the first sub-circuit board 301 in the first direction X is at least twice the width of the binding area 203 in the first direction X, that is, in the folded state, the size of the bent portion of the first sub-circuit board 301 is greater than or equal to the size of the binding area 203, that is, the first sub-circuit board 301 forms a closed loop when folded. In other embodiments, the first sub-circuit board 301 can also be folded into other states such as a non-closed loop. In this embodiment, a closed loop is preferred, thereby obtaining a larger contact area. The binding area 203 is wrapped within the first sub-circuit board 301. One side of the bent portion of the first sub-circuit board 301 abuts against the back panel of the screen body 201, and the other side abuts against the back of the binding area 203, thereby greatly increasing the contact area between the first sub-circuit board 301 and the back of the screen body 201, and reducing the probability of delamination of the screen body 201 during use.

[0044] In this embodiment, the portions on both sides of the first sub-circuit board 301 can support the entire flexible circuit board 3 , thereby reducing the consumption of the spacer blocks 4 and thus lowering the production cost.

[0045] The spacers 4 can reduce the bending amplitude of the bent portion 202. Without the spacers 4, when bonding the binding area 203 of the display screen 2 to the back of the screen body 201, the bent portion 202 would bend too much when impacted, thereby disconnecting the signal transmission between the flexible circuit board 3 and the screen body 201. When the two sides of the first sub-circuit board 301 are used for support, the rigid impact on the flexible circuit board 3 can be converted into a flexible impact. Since the supporting parts on both sides of the first sub-circuit board 301 are also made of flexible material, the impact effect can be mitigated.

[0046] Please refer to Figure 7 , Figure 7 This is a schematic structural diagram of an embodiment of a display device provided by the present application. This embodiment discloses a display device 5 comprising a display panel 1 and a frame 6. The frame 6 engages with the display panel 1, securing the display panel 1 to the frame 6, with the display screen 2 of the display panel 1 facing away from the frame 6. When power is supplied to the display panel 1, the display screen 2 of the display panel 1 displays an image. When subjected to an impact, the reinforced display panel 1 effectively reduces the probability of failure and the possibility of delamination of the screen 201 due to bending of the bent portion 202, thereby improving the stability of the display device 5 during use.

[0047] The above description is merely an embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: include: Display screens and flexible circuit boards; The display screen includes a screen body, a bending portion, and a binding area, wherein the binding area is bent to the back side of the screen body through the bending portion; The width of the flexible circuit board along the first direction is greater than the width of the binding area along the first direction; the first direction is the extension direction of the short side of the screen body; The portion of the flexible circuit board that exceeds the edge of the binding area along the first direction, and the portion of the flexible circuit board that exceeds the edge of the binding area is provided with metal, and the metal is located on the side of the flexible circuit board that is away from the screen body. The portion of the flexible circuit board that exceeds the edge of the binding area is bent to the back of the binding area and is fixed to the back of the screen body by conductive glue.

2. The display panel according to claim 1, wherein: The width of both sides of the flexible circuit board along the first direction exceeds the binding area by at least 3 mm.

3. The display panel according to claim 1, wherein: The flexible circuit board includes a first sub-circuit board and a second sub-circuit board arranged along a second direction, wherein the first sub-circuit board and the second sub-circuit board are integrally formed; and a flattened width of the first sub-circuit board along the first direction is greater than a flattened width of the second sub-circuit board; The second direction is perpendicular to the first direction.

4. The display panel according to claim 3, wherein: Along the first direction, a flattened width of the first sub-circuit board is at least twice a width of the binding area.

5. The display panel according to claim 1, wherein: A padding block is provided between the binding area and the back of the screen body, and a portion of the flexible circuit board that exceeds the edge of the binding area wraps around a side surface of the padding block.

6. The display panel according to claim 5, wherein: The padding block is provided with a through hole for enhancing the heat dissipation effect of the screen body.

7. A display device comprising a display panel, characterized in that: The display panel is the display panel according to any one of claims 1 to 6.

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