CN108877512B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108877512B CN108877512B CN201810555636.0A CN201810555636A CN108877512B CN 108877512 B CN108877512 B CN 108877512B CN 201810555636 A CN201810555636 A CN 201810555636A CN 108877512 B CN108877512 B CN 108877512B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention provides a display panel and a device thereof, wherein the display panel comprises a display area and a non-display area, the non-display area comprises a bending area and a pre-bending area, the bending area is positioned at one side of the non-display area close to the display area, the pre-bending area is adjacent to the bending area and is positioned at one side of the non-display area far away from the display area, and a bending-resistant layer is arranged on the surface of the pre-bending area, wherein the stiffness of the bending-resistant layer is greater than that of the pre-bending area. According to the technical scheme, the bending-resistant layer is arranged on the surface of the pre-bending area, so that the stiffness of the pre-bending area is improved, the synchronous bending of the non-display area during reverse bending is guaranteed, the wiring open circuit of the non-display area caused by reverse bending of the non-display area is avoided, the bending effect and the product yield are improved, the operation is simple, and the process implementation difficulty is low.
Description
Technical Field
The invention relates to the technical field of screen display, in particular to a display panel and a display device.
Background
With the progress of display technology, screens of electronic display products are developing towards narrow frames or even no frames, and bending of the flexible display panel is an important technical means for reducing the lower frame of the display device.
However, in the flexible display panel manufactured by the bending method in the prior art, the wires of the non-display Area (i.e., non-AA Area, active display Area, active Area) are often broken, which results in failure of control over the display Area.
Disclosure of Invention
Therefore, an object of the present invention is to provide a display panel and a display device, so as to solve the problem in the prior art that when a non-display area is bent, a trace is easily broken.
In order to achieve the above object, the present invention provides a display panel, which includes a display area and a non-display area, wherein the non-display area includes a bending area and a pre-bending area, the bending area is located on a side of the non-display area close to the display area, the pre-bending area is adjacent to the bending area and located on a side of the non-display area away from the display area, and a bending-resistant layer is disposed on a surface of the pre-bending area, wherein a stiffness of the bending-resistant layer is greater than a stiffness of the pre-bending area.
Optionally, the bending-resistant layer has a stiffness of more than 300 Nm.
Optionally, the bending-resistant layer has a stiffness within 300Nm to 400 Nm.
Optionally, the bending-resistant layer also covers part or all of the surface of the bending region.
Optionally, in a first direction, the width of the anti-bending layer is within 0-1 mm, the first direction is a direction from the display area to the non-display area, and the first direction is parallel to the edge of the display panel.
Optionally, two surfaces of the display panel are a front surface serving as a display surface and a back surface corresponding to the front surface, and the bending-resistant layer is disposed on the front surface or the back surface of the pre-bending region.
Optionally, the kink-resistant layer comprises at least one support membrane or at least one modular structure.
Optionally, the module structure is a flexible cover plate or a polarizer.
Optionally, the support film is a polyethylene terephthalate PET film or an adhesive film.
Optionally, the adhesive film is a double-sided tape.
Optionally, the double-sided tape is disposed on a back surface of the pre-bending region, and the double-sided tape is used to fix the bending end after the non-display region of the display panel is bent.
Optionally, the bending-resistant layer is a process film layer disposed on the front surface of the pre-bending region, and the process film layer is a film layer removed from the front surface of the pre-bending region after the bending of the non-display region is completed.
Optionally, the non-display area surrounds the display area, the non-display area includes a plurality of sides respectively corresponding to each side of the display area, at least one side of the non-display area includes a bending area and a pre-bending area, and a bending-resistant layer is disposed on a surface of the pre-bending area of the at least one side.
The present invention also provides a display device, characterized in that: the display device comprises the display panel.
According to the technical scheme, the bending-resistant layer with the stiffness greater than that of the pre-bending area is arranged on the surface of the pre-bending area on the side, far away from the display area, of the non-display area of the display panel, so that the stiffness of the pre-bending area is improved, synchronous bending of the non-display area during reverse bending is guaranteed, wiring disconnection of the non-display area caused by reverse bending of the non-display area is avoided, the bending effect and the product yield are improved, the operation is simple, and the process implementation difficulty is low.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view of a display panel according to another embodiment of the present invention;
fig. 3 is a schematic view of a display panel according to another embodiment of the invention.
Detailed Description
As described in the background art, the problem of wire breakage of the non-display area often occurs in the flexible display panel in the prior art, and the inventor researches and discovers that the root cause of the problem is that the flexible screen body has the characteristics of thinness, softness and the like, and a general flexible screen body has a thickness of only about 20um and is easy to curl, so that it is extremely difficult to realize the integral bending of the flexible screen body. In the actual bending process, the area to be bent of the flexible screen body is easily bent unevenly, such as only point bending or local bending, for example, two ends warping. After the display panel is bent, sharp-angled wrinkles are easily formed in a bending area, so that a screen body is folded, wiring in a non-display area is broken, circuit contact in the display panel is poor, the bending power and the product yield of the display panel are affected, and meanwhile the assembly of a terminal product is affected.
Based on this, the invention provides a display panel, which includes a display area and a non-display area, wherein the display area includes a bending area and a pre-bending area, the bending area is located at a side of the non-display area close to the display area, the pre-bending area is adjacent to the bending area and located at a side of the non-display area far from the display area, a bending-resistant layer is disposed on a surface of the pre-bending area, and a stiffness of the bending-resistant layer is greater than a stiffness of the pre-bending area.
According to the technical scheme, the bending-resistant layer with the stiffness greater than that of the pre-bending area is arranged on the surface of the pre-bending area of the display panel, so that the stiffness of the pre-bending area is improved, synchronous bending can be achieved when the non-display area is reversely bent, and the situation that only one point is bent and other areas are not bent synchronously can be avoided.
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
An embodiment of the present invention provides a display panel, as shown in fig. 1, the display panel includes a display area 1 (i.e., an AA area) and a non-display area 2 (i.e., a non-AA area), and the non-display area 1 surrounds the display area 2.
The non-display area 2 includes a plurality of sides respectively corresponding to the sides of the display area, one side of the non-display area includes a bending area 3 and a pre-bending area 4, wherein the bending area 3 is located at one side of the non-display area 2 close to the display area 1, and the pre-bending area 4 is adjacent to the bending area 3 and located at one side of the non-display area 2 far from the display area 1. A bending-resistant layer is disposed on the front surface of the pre-bending area 4, wherein the front surface and the front surface of the display panel as the display surface are in the same plane, and the stiffness of the bending-resistant layer is greater than that of the material of the pre-bending area. In this embodiment, the width of the pre-bending region is greater than or equal to the width of the anti-bending layer.
The bending-resistant folding layer with the stiffness larger than that of the pre-bending area is arranged in the non-bending area on the side edge of the bending area of the non-display area, so that the synchronism of the bending of the non-display area is improved, the bending effect and the product yield are further improved, the operation is simple, and the process implementation difficulty is low.
As a further example of this embodiment, the stiffness of the bending-resistant fold may be more than 300Nm, thereby ensuring that the bending-resistant fold having a stiffness within this range can effectively improve the bending synchronization when the non-display area is bent in the reverse direction.
As a further example of this embodiment, the stiffness of the flexfold may be in the range of 300Nm-400 Nm. In this embodiment, the stiffness of the bending-resistant layer is selected to be within a range of 300Nm or more and 400Nm or less, so that the bending-resistant layer has a certain stiffness to ensure the bending synchronization of the non-display area, and the stiffness of the bending-resistant layer is not too high to cause the bending difficulty of the display area. On the basis, the bending-resistant layer can also cover part or all of the surface of the bending area, and the bending operation of the bending area is facilitated due to the increased range of the bending-resistant layer, and the embodiment is described in detail below.
As a further embodiment of the embodiment, the width of the anti-bending layer in a first direction can be selected within a range of 0-1 mm, wherein the first direction is a direction from the display area to the non-display area, and the first direction is parallel to the edge of the display panel. Because the anti-bending layer is used as a bending area for providing bending operation when the display panel is reversely bent, the anti-bending layer of the embodiment selects the width range, can ensure that the area of the display panel is as large as possible relative to the area of the non-display area, and improves the utilization rate of the display panel; meanwhile, better bending operation can be obtained, and the bending success rate and the bending effect are improved.
And when the width of the bending-resistant layer is within the range of 0-1 mm, namely the width of the pre-bending area is at least as wide as that of the bending-resistant layer, namely within the range of 0-1 mm, the width range does not influence the bending action of the bending area, namely, the pre-bending area of the bending-resistant layer area is not bent during actual operation. In this case, the stiffness of the bending-resistant layer can be as high as possible, such as 500Nm, 800Nm, etc., and more bending-resistant layers can be selected.
As a further embodiment of the embodiment, the anti-bending layer may also be disposed on the back of the pre-bending region 4, wherein the back is in the same plane as the back of the display panel as the display surface.
As a further example of this embodiment, the buckling-resistant layer may include at least one layer of modular structure, such as: flexible cover plates or polarizers, etc.
As a further example of this embodiment, the buckling-resistant layer may comprise at least one supporting film having a certain stiffness, such as: polyethylene terephthalate PET film or adhesive film. Specifically, the bending-resistant layer may be not limited to the above-mentioned material, but may be other material having similar functions, that is, any material having stiffness higher than that of the material of the pre-bending region may be used as the bending-resistant layer.
As a further example of this embodiment, the bending-resistant layer can be fixed to the pre-bending zone 4 by gluing, pressing or other fixing means known in the art.
Another embodiment of the present invention provides a display panel, as shown in fig. 2, the display panel of this embodiment is different from the display panel of the previous embodiment in that: the display panel is provided with a non-display area 2 only on one side, and the other sides of the display panel are all provided with display areas 1, and the non-display area does not surround the display areas.
The non-display area 2 includes a bending area 3 and a pre-bending area 4 (indicated by an ellipse in fig. 2), the bending area 3 is located on one side of the non-display area 2 close to the display area 1, and the pre-bending area 4 is adjacent to the bending area 3 and located on one side of the non-display area 2 far from the display area 1. A bending-resistant layer is disposed on the front surface of the pre-bending area 4, wherein the front surface and the front surface of the display panel as the display surface are in the same plane, and the stiffness of the bending-resistant layer is greater than that of the material of the pre-bending area.
This embodiment can select only to set up the non-display area that includes the bending zone in the one side that this display panel needs to buckle according to actual need and be used for buckling, sets up anti-buckling layer in this pre-bending district of this non-display area, and other regions of this display panel all form the display area to when guaranteeing the synchronism that this display panel non-display area reverse buckling, can obtain great display area, improve display panel's display utilization ratio.
Yet another embodiment of the present invention provides a display panel, which is different from the display panel of the previous embodiment in that: the bending-resistant layer covers not only the surface of the pre-bending region, but also extends to cover part of the surface of the bending region, even the whole surface.
The bending-resistant folding layer in the embodiment can effectively improve the bending synchronism of the non-display area during reverse bending, the bending-resistant folding layer covering the surface of the bending area can be used as a buffer structure for buffering the bending stress of the bending area during reverse bending of the non-display area of the display panel, and the larger stress generated by the bending area during bending is transmitted to the bending-resistant folding layer and can protect the bending area and the routing wires inside the bending area through the buffer effect of the bending-resistant folding layer, so that the phenomenon of breaking caused by stress concentration of the bending area is avoided; when the bending is carried out, the internal wiring is broken, and the bending forming power is improved.
Yet another embodiment of the present invention provides a display panel, which is different from the display panel of the previous embodiment in that: the bending-resistant layer is double-sided adhesive tape or other film material with an adhesive function, and is arranged on the back of the pre-bending area. After the non-display region of the display panel is reversely bent, the bent end may be adhesively fixed by the bending-resistant layer having an adhesive property. This embodiment is guaranteeing that the non-display area is synchronous on the basis of buckling when buckling in the reverse direction, and the end of buckling after further buckling is fixed, has avoided the end of buckling of the display panel after buckling to kick-back and has warp, has further improved the effect of buckling.
Another embodiment of the present invention provides a display panel, which is different from the display panel of the previous embodiment in that: the bending-resistant layer provided in the pre-bending zone 4 is a process film layer provided on the front side of the pre-bending zone. The process film layer is a film layer that needs to be removed after the bending of the non-display region is completed.
The process film layer can be made of a film material with stiffness greater than that of the pre-bending area, such as polyethylene terephthalate (PET) film. The procedural film is attached to the back of the bending area before the non-display area is bent reversely, so that the non-display area is helped to realize synchronous bending of reverse bending, and after the bending of the non-display area is finished, the procedural film is removed from the front of the pre-bending area. By arranging the process film layer, the reverse synchronous bending of the non-display area of the display panel can be ensured, the short circuit of the wiring of the non-display area is avoided, and meanwhile, the thickness of the non-display area of the bent display panel is reduced, which is beneficial to the subsequent assembly of a terminal product; and the process film layer removed after the bending of the non-display area is finished can also be used for other display panels, so that the repeated utilization rate of the process film layer is improved, the process film layer is economic and environment-friendly, and the operation cost is saved.
Another embodiment of the present invention provides a display panel, as shown in fig. 3, a non-display area of the display panel surrounds a display area, wherein the non-display area includes a plurality of side edges corresponding to respective side edges of the display area, and four side edges of the non-display area each include a bending area and a pre-bending area, and a bending-resistant layer is disposed on a surface of the pre-bending area of each side edge.
The bending-resistant layer is arranged on the surface of the pre-bending area of each side edge of the non-display area, so that each side edge of the non-display area can be bent, and the requirement of multi-side bending is met.
Specifically, the anti-bending layer can be arranged in multiple regions according to actual requirements, if multiple edges of the display panel need to be bent, the anti-bending layer is arranged on the pre-bending region of the corresponding edge to be bent, as shown in fig. 3, the AA region 1 is provided with a bending region 3 and a pre-bending region 4 in four directions, namely, up, down, left and right, corresponding to the a, b, c and d parts, and if the bending region of the a part needs to be bent, the anti-bending layer is arranged on the pre-bending region of the part; if the bending areas of the three parts a, b and c need to be bent, the bending-resistant layers are arranged on the pre-bending areas of the three parts for multi-section arrangement, so that the stiffness of the bending area in each bending direction is improved, the bending synchronism of the non-AA areas in each bending direction is ensured, and the bending effect and the product yield are improved.
As a further embodiment of this embodiment, the non-display area may be formed only on multiple sides of the display panel, such as on two opposite sides, or on two adjacent sides, or on three sides, etc., where each side includes a bending area and a pre-bending area, and accordingly, a bending-resistant layer may be disposed on the side to be bent according to the actual bending requirement. The embodiment can ensure the synchronism of reverse bending of the non-display area of the display panel, obtain larger area of the display area as much as possible, improve the display utilization rate and simplify the process.
Furthermore, the bending-resistant layers on the same side of the display panel in this embodiment may also be multiple bending-resistant layers arranged at intervals, for example, 2 segments, 3 segments, or only arranged at two ends and the middle of the pre-bending area, so as to save materials. The concrete setting is several sections, how arrange, does not limit this in this embodiment, as long as can realize smoothly buckling can.
Another embodiment of the present invention provides a display device, which includes the display panel in the above embodiments, the display device may be a smart phone, a tablet computer, a smart bracelet, a smart watch, or the like, and the display device improves the synchronization of reverse bending of the display device by disposing a bending-resistant layer with stiffness greater than that of the pre-bending region on the surface of the pre-bending region of the non-display region, so as to avoid the open circuit of the wires in the non-display region during reverse bending, improve the bending effect, and ensure the performance of the display device after bending.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. A display panel comprising a display area and a non-display area, characterized in that: the non-display area comprises a bending area and a pre-bending area, the bending area is positioned on one side of the non-display area close to the display area, the pre-bending area is adjacent to the bending area and positioned on one side of the non-display area far away from the display area, and a bending-resistant layer is arranged on the surface of the pre-bending area, wherein the stiffness of the bending-resistant layer is greater than that of the pre-bending area;
the bending-resistant folding layer also covers part or all of the surface of the bending area, the stiffness of the bending-resistant folding layer is within 300Nm-400Nm, the bending-resistant folding layer comprises at least one layer of supporting thin film, the supporting thin film is an adhesive thin film, and the supporting thin film is arranged on the back surface of the display panel.
2. The display panel according to claim 1, characterized in that: the bending-resistant folded layer has stiffness greater than 300 Nm.
3. The display panel according to claim 1, characterized in that: in a first direction, the width of the bending-resistant layer is within 0-1 mm, the first direction is the direction from the display area to the non-display area, and the first direction is parallel to the edge of the display panel.
4. The display panel according to claim 1, characterized in that: the display panel comprises a display panel, a bending-resistant layer and a pre-bending area, wherein the two surfaces of the display panel are a front surface serving as a display surface and a back surface corresponding to the front surface, and the bending-resistant layer is arranged on the front surface or the back surface of the pre-bending area.
5. The display panel according to claim 1, characterized in that: the bending-resistant layer comprises at least one layer of module structure.
6. The display panel according to claim 5, wherein: the module structure is a flexible cover plate or a polaroid.
7. The display panel according to claim 6, wherein: the sticky film is double-sided adhesive tape.
8. The display panel according to claim 7, wherein: the double-sided adhesive tape is arranged on the back of the pre-bending area, and the double-sided adhesive tape is used for fixing the bending end after the non-display area of the display panel is bent.
9. The display panel according to any one of claims 1 to 8, wherein: the bending-resistant folding layer is a process film layer arranged on the front face of the pre-bending area, and the process film layer is a film layer removed from the front face of the pre-bending area after the non-display area is bent.
10. The display panel according to any one of claims 1 to 8, wherein: the non-display area surrounds the display area, the non-display area comprises a plurality of sides which respectively correspond to the sides of the display area, at least one side of the non-display area comprises a bending area and a pre-bending area, and a bending-resistant layer is arranged on the surface of the pre-bending area of the at least one side.
11. A display device, characterized in that: the display device comprising the display panel of any one of claims 1-8.
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| CN201810555636.0A CN108877512B (en) | 2018-05-31 | 2018-05-31 | Display panel and display device |
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| CN201810555636.0A CN108877512B (en) | 2018-05-31 | 2018-05-31 | Display panel and display device |
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| CN108877512B true CN108877512B (en) | 2021-04-06 |
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| CN109473046B (en) * | 2018-12-18 | 2020-04-28 | 武汉华星光电半导体显示技术有限公司 | Optical cement and display panel |
| CN112071190A (en) * | 2020-09-25 | 2020-12-11 | 武汉天马微电子有限公司 | Display panel and display device |
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| KR102653753B1 (en) * | 2016-11-16 | 2024-04-02 | 삼성디스플레이 주식회사 | Window for felxible display device and felxible display device having thereof |
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