Display panel and display device

Abstract

The utility model provides a display panel and a display device, and belongs to the technical field of display. The display panel comprises a panel, a polaroid, optical cement and a cover plate. The panel comprises a first straight part, a bent part and a second straight part which are connected in sequence. The polaroid is attached to the first straight part and the bent part. The cover plate and the polaroid are connected through optical cement. In addition, due to the fact that the polaroid is attached to the bending part, the polaroid enhances the strength of the bending part, and the display panel does not need to coat UV glue on the surface of the bending part. In this way, the situation that the UV glue overflows and extrudes the panel and the cover plate does not exist, and therefore the display panel is prevented from losing efficacy.

Description

Technical Field

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

[0002] The display panel is an important component of a display device and is used to display images.

[0003] In the related art, the display panel includes a panel, a polarizer, an optical glue and a cover plate. The panel includes a first straight portion, a bent portion and a second straight portion connected in sequence, and the polarizer covers the first straight portion. In order to improve the strength of the bent portion, UV (Ultraviolet Rays) glue is usually applied to the bent portion. Then, the cover plate is adhered to the polarizer with optical glue.

[0004] However, after overflowing, the UV glue will flow along the edge of the polarizer, causing the height of the UV glue to be greater than the height of the polarizer. When the cover plate is subsequently attached to the polarizer through optical glue, the UV glue will squeeze the cover plate and the panel, making the display panel prone to failure. Utility Model Content

[0005] The present disclosure provides a display panel and a display device, which can solve the technical problems existing in the related art. The technical solutions of the display panel and the display device are as follows.

[0006] In a first aspect, the present disclosure provides a display panel, the display panel comprising a panel, a polarizer, an optical adhesive and a cover plate;

[0007] The panel comprises a first straight portion, a bent portion and a second straight portion connected in sequence;

[0008] The polarizer is bonded to the first straight portion and the bent portion;

[0009] The cover plate and the polarizer are connected via the optical adhesive.

[0010] In a possible implementation, the polarizer includes a first film layer and a second film layer;

[0011] The first film layer is at least attached to the first straight portion and the bent portion;

[0012] The second film layer is located on a side of the first film layer away from the first straight portion. The second film layer is opposite to the first straight portion and is staggered from the bent portion.

[0013] In a possible implementation manner, the modulus of the second film layer is greater than the modulus of the first film layer.

[0014] In a possible implementation manner, the first film layer includes at least a first TAC film layer.

[0015] In a possible implementation, the first film layer includes a plurality of sub-film layers, and the first TAC film layer is the sub-film layer closest to the second film layer among the plurality of sub-film layers.

[0016] In a possible implementation, the plurality of sub-film layers include a first TAC film layer, a first PSA film layer, a buffer layer, and a second PSA film layer which are arranged in sequence;

[0017] Wherein, the second PSA film layer is bonded to the first straight portion and the bent portion.

[0018] In a possible implementation manner, the polarizer is also bonded to the second straight portion.

[0019] In a possible implementation manner, the polarizer has an avoidance hole, and the avoidance hole is opposite to the second straight portion;

[0020] The display panel further includes an IC chip, and the IC chip is located in the avoidance hole and is attached to the second straight portion.

[0021] In a possible implementation, the second film layer includes a PVA film layer and a second TAC film layer;

[0022] The PVA film layer is bonded to the first film layer.

[0023] In a second aspect, the present disclosure provides a display device, comprising a display panel as described in any one of the first aspects.

[0024] The technical solution provided by the present disclosure includes at least the following beneficial effects:

[0025] The present disclosure provides a display panel, in which the polarizer is not only attached to the first straight portion of the panel, but also to the bent portion of the panel. That is, the polarizer is extended to the bent portion in the display panel. Since the polarizer can strengthen the strength of the bent portion, the bent portion is prevented from cracking. Therefore, there is no need to apply UV glue to the bent portion of the display panel, and there is no situation where the UV glue overflows and squeezes the panel and the cover plate, thereby avoiding failure of the display panel.

[0026] 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 present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the description, are used to explain the principles of the present disclosure. In the drawings:

[0028] Figure 1It is a schematic diagram of the structure of a display panel before being bent in the related art;

[0029] Figure 2 is a schematic structural diagram of a display panel before being bent, shown in an embodiment of the present disclosure;

[0030] Figure 3 is a schematic diagram of a structure of a display panel after being bent, shown in an embodiment of the present disclosure;

[0031] Figure 4 is a schematic structural diagram of a display panel before being bent, shown in an embodiment of the present disclosure;

[0032] Figure 5 is a schematic structural diagram of a display panel before being bent, shown in an embodiment of the present disclosure;

[0033] Figure 6 It is a schematic diagram of the structure of a display panel before being bent, shown in an embodiment of the present disclosure.

[0034] Legend

[0035] 1. panel, 11. first straight portion, 12. bent portion, 13. second straight portion;

[0036] 2. polarizer, 20. avoidance hole, 21. first film layer, 211. first TAC film layer, 212. first PSA film layer, 213. buffer layer, 214. second PSA film layer, 22. second film layer, 221. second TAC film layer, 222. PVA film layer;

[0037] 3. Optical glue;

[0038] 4. Cover plate;

[0039] 5. IC chip;

[0040] 6. FPC board;

[0041] 7. UV glue.

[0042] The above drawings show clear embodiments of the present disclosure, which will be described in more detail below. These drawings and text descriptions are not intended to limit the scope of the present disclosure in any way, but to illustrate the concepts of the present disclosure to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0044] The terms used in the embodiments of the present disclosure are only used to explain the embodiments of the present disclosure, and are not intended to limit the present disclosure. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with ordinary skills in the field to which the present disclosure belongs. The words "first", "second", "third" and similar words used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limit, but indicate that there is at least one. Words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] The display panel is an important component of the display device, used to display images. Figure 1 As shown, in the related art, the display device includes a panel 1, a polarizer 2, an optical adhesive 3 and a cover plate 4. The panel 1 includes a first straight portion 11, a bent portion 12 and a second straight portion 13 connected in sequence, and the polarizer 2 covers the first straight portion 11.

[0046] In order to improve the strength of the bending portion 12, UV (Ultraviolet Rays) glue 7 is usually applied to the bending portion 12. Then, the cover plate 4 is adhered to the polarizer 2 using optical glue 3.

[0047] However, the UV glue 7 in the related art will flow along the edge of the polarizer 2 after overflowing, resulting in the height of the UV glue 7 being greater than the height of the polarizer 2. This causes the UV glue 7 to squeeze the cover plate 4 and the panel 1 when the optical glue 3 and the cover plate 4 are subsequently attached to the polarizer 2, making the display panel prone to failure.

[0048] In view of the above technical problems, the present disclosure provides a display panel. Figure 2 and Figure 3 As shown, the display panel includes a panel 1, a polarizer 2, an optical adhesive 3 and a cover plate 4. The panel 1 includes a first straight portion 11, a bent portion 12 and a second straight portion 13 connected in sequence. The polarizer 2 is attached to the first straight portion 11 and the bent portion 12. The cover plate 4 and the polarizer 2 are connected by the optical adhesive 3.

[0049] in, Figure 2It is a schematic diagram of the structure of the display panel before being bent. Figure 3 for Figure 2 Schematic diagram of the structure of the display panel after being bent.

[0050] The polarizer 2 is used to convert natural light passing through the polarizer 2 into polarized light, so that the panel 1 can display color images.

[0051] The panel 1 is made of a flexible material (such as polyimide, etc.), so that the panel 1 can be bent, folded and curled. After the display panel is bent, the panel 1 is U-shaped as a whole, and the panel 1 can achieve COP packaging, visually increasing the screen ratio of the display panel in the display device.

[0052] The optical adhesive 3 is colorless and transparent, and has a light transmittance of more than 90%. The optical adhesive 3 can be a UV curing adhesive, a heat curing adhesive, a thermal curing adhesive, etc. The disclosed embodiment does not specifically limit the type of the optical adhesive 3.

[0053] The cover plate 4 may be made of a transparent material, such as tempered glass and / or a thin film material, etc., which has high strength, transparency and wear resistance.

[0054] In the technical solution provided by the embodiment of the present disclosure, the polarizer 2 in the display panel is not only attached to the first straight portion 11 of the panel 1, but also attached to the bent portion 12 of the panel 1, that is, the polarizer 2 is extended to the bent portion 12. Therefore, the polarizer 2 can strengthen the strength of the bent portion 12 and prevent the bent portion 12 from cracking. Therefore, there is no need to apply UV glue to the bent portion 12 in the display panel, so there is no situation where the UV glue overflows and squeezes the panel 1 and the cover plate 4, thereby preventing the display panel from failing.

[0055] In some examples, such as Figure 2 and Figure 3 As shown, the polarizer 2 includes a first film layer 21 and a second film layer 22. The first film layer 21 is at least attached to the first straight portion 11 and the bent portion 12. The second film layer 22 is located on a side of the first film layer 21 away from the first straight portion 11, the second film layer 22 is opposite to the first straight portion 11, and is staggered with the bent portion 12.

[0056] In this way, only the first film layer 21 of the polarizer 2 is bonded to the bending portion 12 , thereby reducing the thickness of the polarizer 2 bonded to the bending portion 12 and reducing the influence of the polarizer 2 on the bending of the bending portion 12 .

[0057] in, Figure 2 and Figure 3The polarizer 2 shown can be regarded as a polarizer with the second film layer 22 opposite to the bending portion 12 removed. In the process of processing the display panel, two schemes can be used to achieve partial removal of the second film layer 22. One scheme is to process the incoming material of the polarizer 2, that is, before the first film layer 21 and the second film layer 22 are pasted, the second film layer 22 is cut so that the length of the second film layer 22 is not enough to cover the bending portion 12, and then the first film layer 21 and the second film layer 22 are pasted together. Another scheme is to process the polarizer 2 in the module process. The specific method is to ablate the second film layer 22 after the entire polarizer 2 is attached to the panel 1, and only retain the part of the second film layer 22 corresponding to the first straight portion 11.

[0058] In some examples, in order to further reduce the influence of the first film layer 21 on the bending of the bending portion 12, the modulus (elastic modulus) of the second film layer 22 is set to be greater than the modulus of the first film layer 21. The smaller the modulus of the film layer, the easier it is to bend.

[0059] Next, the implementation method of the first film layer 21 is exemplified.

[0060] In some examples, such as Figure 4 As shown, the first film layer 21 at least includes a first TAC (Triacetate Cellulose) film layer 211. The first TAC film layer 211 has a suitable range of modulus and waterproof properties, so the first TAC film layer 211 can replace the UV glue 7 in the related art.

[0061] As mentioned above, firstly, the first TAC film layer 211 has a certain modulus and waterproof properties, therefore, the first film layer 21 must retain the first TAC film layer 211. Secondly, the first film layer 21 should not be too thick, otherwise it will affect the bending of the bending portion 12. Taking these two factors into consideration, in some examples, such as Figure 4 As shown, in the embodiment of the present disclosure, the first TAC film layer 211 of the polarizer 2 and the sub-film layer between the first TAC film layer 211 and the panel 1 are defined as the first film layer 21, and the other sub-film layers are defined as the second film layer 22. In this way, the thickness of the first film layer 21 is minimized while the first TAC film layer 21 is retained in the first film layer 21. That is, Figure 4As shown, the first film layer 21 includes multiple sub-film layers, and the first TAC film layer 211 is the sub-film layer closest to the second film layer 22 among the multiple sub-film layers. It can be understood that the first TAC film layer 211 is located on the surface of the multiple sub-film layers. If the multiple sub-film layers below the first TAC film layer 211 are removed, it will affect the adhesion between the first TAC film layer 211 and the panel 1. Therefore, the embodiment of the present disclosure retains the multiple sub-film layers below the first TAC film layer 211. In this way, it can be ensured that the first film layer 21 in the first straight portion 11 and the bent portion 12 is an integrated structure, thereby ensuring that the first film layer 21 has a higher strength.

[0062] In some examples, such as Figure 5 As shown, the multiple sub-film layers include a first TAC film layer 211, a first PSA (Pressure Sensitive Adhesive) film layer 212, a buffer layer 213, and a second PSA film layer 214 arranged in sequence. Among them, the second PSA film layer 214 is bonded to the first straight portion 11 and the bent portion 12. The first PSA film layer 212 and the second PSA film layer 214 have high bonding force and viscoelasticity.

[0063] In some examples, such as Figure 2-Figure 5 As shown, before the display panel is bent, the polarizer 2 is still attached to the second straight portion 13. In this way, it can be ensured that the polarizer 2 completely covers the bent portion 12, and it is avoided that the polarizer 2 can only cover part of the bent portion 12 after the polarizer 2 and the bent portion 12 are bent together.

[0064] In some examples, such as Figure 2-Figure 5 As shown, the polarizer 2 has an avoidance hole 20, which is opposite to the second straight portion 13. The display panel also includes an IC chip 5, which is located in the avoidance hole 20 and is attached to the second straight portion 13. In this way, the polarizer 2 can provide waterproof protection for the area between the IC chip 5 and the first straight portion 11 to prevent corrosion of the display circuit.

[0065] In the process of processing the display panel, after the polarizer 2 is attached to the panel 1, the first film layer 21 of the polarizer 2 is ablated to obtain the avoidance hole 20. The size of the avoidance hole 20 can be the same as the size of the IC chip 5 (e.g. Figure 5 Alternatively, the size of the avoidance hole 20 may also be larger than the size of the IC chip 5 (as shown in FIG. Figure 6 The present disclosure does not specifically limit this.

[0066] In some examples, such as Figure 2-Figure 5As shown, the display panel also includes a FPC (Flexible Printed Circuit) board 6. The FPC board 6 is electrically connected to the IC chip 5, and there is a wiring between the FPC board 6 and the IC chip 5. The polarizer 2 extends from the first straight portion 11 to the end of the FPC board 6 close to the IC chip 5, thereby covering the wiring between the FPC board 6 and the IC chip 5. In this way, the polarizer 2 can cover all areas of the panel 1 except the IC chip 5 and the FPC board 6. Thereby further strengthening the protection of the panel 1 and improving the overall reliability of the product.

[0067] In some examples, such as Figure 2-Figure 5 As shown, the second film layer 22 includes a second TAC film layer 221 and a PVA (Polyvinyl Alcohol) film layer 222, and the PVA film layer 222 is attached to the first TAC film layer 211. The PVA film layer 222 is used to polarize light, and the first TAC film layer 211 and the second TAC film layer 221 are used to protect the PVA film layer 222 to prevent the PVA film layer 222 from hydrolysis.

[0068] The following is an exemplary description of the processing of the display panel.

[0069] In the first step, the polarizer 2 and the FPC board 6 are attached to the panel 1, and at this time, the panel 1 as a whole is still in a flat state.

[0070] In the second step, the second film layer 22 of the polarizer 2 is ablated so that the second film layer 22 is only opposite to the first straight portion 11 of the panel 1 .

[0071] In the third step, the first film layer 21 of the panel 1 is ablated so that the first film layer 21 has an avoidance hole 20 at a position opposite to the second straight portion 13 , and the IC chip 5 is attached to the second straight portion 13 at the avoidance hole 20 .

[0072] In the fourth step, the cover plate 4 is adhered to the second film layer 22 by means of the optical adhesive 3 .

[0073] In the fifth step, the bending portion 12 of the panel 1 is bent.

[0074] Among them, the second step in the above steps can also be replaced by cutting the second film layer 22 before pasting the first film layer 21 and the second film layer 22 so that the length of the second film layer 22 is not enough to cover the bending part 12, and then pasting the first film layer 21 and the second film layer 22 together.

[0075] An embodiment of the present disclosure further provides a display device, which includes the above-mentioned display panel.

[0076] The display device may be a mobile phone, a computer, a television, a car display device or other display device with a display function, which is not specifically limited in the embodiments of the present disclosure. The display device provided in the embodiments of the present disclosure has the beneficial effects of the display panel provided in the embodiments of the present disclosure, and the specific description of the display panel in the above embodiments can be referred to, and the embodiments of the present disclosure will not be repeated here.

[0077] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that: The display panel comprises a panel (1), a polarizer (2), an optical adhesive (3) and a cover plate (4); The panel (1) comprises a first straight portion (11), a bent portion (12) and a second straight portion (13) which are connected in sequence; The polarizer (2) is in contact with the first straight portion (11) and the bent portion (12); The cover plate (4) and the polarizer (2) are connected via the optical adhesive (3).

2. The display panel according to claim 1, characterized in that: The polarizer (2) comprises a first film layer (21) and a second film layer (22); The first film layer (21) is in contact with at least the first straight portion (11) and the bent portion (12); The second film layer (22) is located on a side of the first film layer (21) away from the first straight portion (11); the second film layer (22) is opposite to the first straight portion (11) and is staggered from the bent portion (12).

3. The display panel according to claim 2, characterized in that: The modulus of the second film layer (22) is greater than the modulus of the first film layer (21).

4. The display panel according to claim 2, characterized in that: The first film layer (21) comprises at least a first TAC film layer (211).

5. The display panel according to claim 4, characterized in that: The first film layer (21) includes a plurality of sub-film layers, and the first TAC film layer (211) is the sub-film layer closest to the second film layer (22) among the plurality of sub-film layers.

6. The display panel according to claim 5, characterized in that: The plurality of sub-film layers include a first TAC film layer (211), a first PSA film layer (212), a buffer layer (213) and a second PSA film layer (214) which are arranged in sequence; Wherein, the second PSA film layer (214) is bonded to the first straight portion (11) and the bent portion (12).

7. The display panel according to any one of claims 1 to 6, characterized in that: The polarizer (2) is also bonded to the second straight portion (13).

8. The display panel according to any one of claims 1 to 6, characterized in that: The polarizer (2) has an avoidance hole (20), and the avoidance hole (20) is opposite to the second straight portion (13); The display panel further comprises an IC chip (5), wherein the IC chip (5) is located in the avoidance hole (20) and is in contact with the second straight portion (13).

9. The display panel according to any one of claims 2 to 6, characterized in that: The second film layer (22) comprises a second TAC film layer (221) and a PVA film layer (222); The PVA film layer (222) is bonded to the first film layer (21).

10. A display device, characterized in that: The display device comprises the display panel according to any one of claims 1 to 9.

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