CN111028677A - Display panel and display device - Google Patents

Display panel and display device Download PDF

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Publication number
CN111028677A
CN111028677A CN201911367085.6A CN201911367085A CN111028677A CN 111028677 A CN111028677 A CN 111028677A CN 201911367085 A CN201911367085 A CN 201911367085A CN 111028677 A CN111028677 A CN 111028677A
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CN
China
Prior art keywords
display panel
polarizer
bending
polaroid
sensitive adhesive
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911367085.6A
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Chinese (zh)
Inventor
李蒙蒙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan New Flat Panel Display Technology Center Co Ltd
Kunshan Govisionox Optoelectronics Co Ltd
Original Assignee
Kunshan New Flat Panel Display Technology Center Co Ltd
Kunshan Govisionox Optoelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kunshan New Flat Panel Display Technology Center Co Ltd, Kunshan Govisionox Optoelectronics Co Ltd filed Critical Kunshan New Flat Panel Display Technology Center Co Ltd
Priority to CN201911367085.6A priority Critical patent/CN111028677A/en
Publication of CN111028677A publication Critical patent/CN111028677A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements

Abstract

The invention provides a display panel and a display device.A first polaroid is arranged in a bending area, a second polaroid is arranged in a non-bending area, and the elastic modulus of the first polaroid is less than or equal to that of the second polaroid; and the first polaroid with smaller elastic modulus can effectively protect the metal wiring and other structures in the bending area without influencing folding, thereby improving the reliability and prolonging the service life of the whole display panel.

Description

Display panel and display device
Technical Field
The invention relates to the field of display screens, in particular to a display panel and a display device.
Background
In the module gluing process stage of the display panel, due to the existence of a gap between the polarizer and the base film layer, the problems of uneven gluing thickness, glue pulling, glue breaking and the like can occur during glue sealing, so that secondary glue sealing is needed for part of the screen body, the screen body is easily scratched by the glue generated by the blade during secondary glue sealing, the poor display of group bright lines, large current and the like is caused, and the product yield is reduced.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a display panel and a display device, in which a first polarizer is disposed in a bending region, a second polarizer is disposed in a non-bending region, and an elastic modulus of the first polarizer is less than or equal to an elastic modulus of the second polarizer, so that a gap between a polarizer layer and a substrate film layer can be reduced by using the first polarizer, thereby improving a sealing effect and avoiding secondary sealing; and the first polaroid with smaller elastic modulus can effectively protect the metal wiring and other structures in the bending area without influencing folding, thereby improving the reliability of the whole display panel.
According to an aspect of the present invention, an embodiment of the present invention provides a display panel, including: the bending area and the non-bending areas are arranged on two sides of the bending area; the first polaroid is arranged in the bending area; and a second polarizer arranged in the non-bending area; and the elastic modulus of the first polarizer is less than or equal to that of the second polarizer.
In one embodiment, the first polarizer includes a first substrate and a first pressure sensitive adhesive, which are stacked, wherein the first substrate includes a flexible material.
In one embodiment, the first substrate comprises a polyimide substrate.
In one embodiment, the first pressure sensitive adhesive is a patterned structure.
In an embodiment, the patterned structure comprises any one or combination of the following shapes: square, circular, arc, diamond, triangle, trapezoid.
In an embodiment, the second polarizer is only disposed in the non-bending region on one side of the bending region, and the first polarizer extends to the first molding region of the non-bending region on the other side of the bending region.
In an embodiment, a thickness of the first pressure sensitive adhesive is equal to a molding compound thickness of the first molding compound region.
In one embodiment, the second polarizer includes a second substrate and a second pressure-sensitive adhesive, wherein the second substrate and the second pressure-sensitive adhesive are stacked.
In one embodiment, the thickness of the second substrate is 75 microns and the thickness of the second pressure sensitive adhesive is 25 microns.
According to another aspect of the present invention, a display device is provided in an embodiment of the present invention, including the display panel described in any one of the above.
According to the display panel and the display device provided by the embodiment of the invention, the first polaroid is arranged in the bending area, the second polaroid is arranged in the non-bending area, the elastic modulus of the first polaroid is less than or equal to that of the second polaroid, and the first polaroid can be used for reducing the gap between a polaroid layer and a base film layer so as to improve the sealing effect and avoid secondary sealing; and the first polaroid with smaller elastic modulus can effectively protect the metal wiring and other structures in the bending area without influencing folding, thereby improving the reliability and prolonging the service life of the whole display panel.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Further, in the exemplary embodiments, since the same reference numerals denote the same components having the same structure or the same steps of the same method, if an embodiment is exemplarily described, only a structure or a method different from the already described embodiment is described in other exemplary embodiments.
Throughout the specification and claims, when one element is described as being "connected" to another element, the one element may be "directly connected" to the other element or "electrically connected" to the other element through a third element. Furthermore, unless explicitly described to the contrary, the term "comprising" and its corresponding terms should only be taken as including the stated features, but should not be taken as excluding any other features.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure. As shown in fig. 1, the display panel includes a bending region 1 and non-bending regions 2 disposed at two sides of the bending region 1, a first polarizer 10 is disposed in the bending region 1, a second polarizer 20 is disposed in the non-bending regions 2, and an elastic modulus of the first polarizer 10 is less than or equal to an elastic modulus of the second polarizer 20. Generally, the display area is located in the non-bending region 2, that is, the light emitting device is disposed in the non-bending region 2, and of course, the light emitting device may also be disposed in the bending region 1. Usually only the position that light emitting device orthographic projection corresponds just can set up the polaroid, and when 1 inside light emitting device that sets up in bending district, bending district 1 can not set up the polaroid usually to the polaroid rete can form the space in bending district 1, and the regional sealed glue at this space place also can consequently receive the influence, and the space between the rete is big more, and the degree of difficulty and the reliability of sealing glue are also low more. Therefore, in order to ensure the sealing effect, a secondary sealing is usually performed, and before the secondary sealing, the sealing needs to be performed, and the blade may scratch the screen body in the sealing process, thereby reducing the display effect, or even preventing the display from being performed. Meanwhile, in the bending process of the display panel, the film layer and the device in the bending area 1 can generate large bending stress and tensile stress, metal wires with high hardness and the like can be greatly influenced, and the metal wires can be seriously damaged even, so that the display effect and the service life of the whole display panel are influenced. In order to solve the above problems, in the embodiment of the present application, the polarizer is extended, that is, the first polarizer 10 is also arranged in the bending region 1, so as to reduce the gap between the polarizer and the substrate film layer, thereby improving the sealing effect, avoiding secondary sealing, and by arranging the first polarizer 10 with a small elastic modulus, the flexibility of the first polarizer 10 can be utilized, and the metal routing and other vulnerable devices and structures in the bending region 1 are protected as much as possible while the bending effect is not affected, thereby improving the reliability and the service life of the display panel.
According to the display panel provided by the embodiment of the invention, the first polaroid is arranged in the bending area, the second polaroid is arranged in the non-bending area, and the elastic modulus of the first polaroid is less than or equal to that of the second polaroid, so that the gap between the polaroid layer and the base film layer can be reduced by using the first polaroid, the sealing effect is improved, and secondary sealing is avoided; and the first polaroid with smaller elastic modulus can effectively protect the metal wiring and other structures in the bending area without influencing folding, thereby improving the reliability and prolonging the service life of the whole display panel.
In one embodiment, as shown in fig. 1, the first polarizer 10 may include a first substrate 11 and a first pressure sensitive adhesive 12, which are stacked, wherein the first substrate 11 includes a flexible material. Through the laminated structure of the first base material 11 and the first pressure-sensitive adhesive 12, the first polarizer 10 can be effectively adhered to the base film layer 3, the first polarizer 10 is not required to be combined with the base film layer 3 in other ways, and the preparation process is simplified. It should be understood that the specific structure of the first polarizer 10 may be selected according to the requirements of the practical application scenario, for example, the first polarizer 10 may only include the host material (the first substrate 11, etc.), as long as the selected specific structure of the first polarizer 10 can meet the requirements of the display panel, and the specific structure of the first polarizer 10 is not limited in the embodiments of the present application.
In a further embodiment, the first substrate 11 may be a flexible material such as a polyimide substrate, so as to relieve and release stress generated during the bending process of the display panel, and effectively protect vulnerable devices such as metal traces in the bending region 1, thereby improving reliability and prolonging service life of the entire display panel. It should be understood that, in the embodiment of the present application, a material of the first substrate 11 may be selected according to a requirement of an actual application scenario, for example, the first substrate 11 may be made of other flexible materials, as long as the selected material of the first substrate 11 can effectively relieve and release a stress generated by bending of the display panel without affecting the bending of the display panel, and the specific material of the first substrate 11 is not limited in the embodiment of the present application.
In a further embodiment, the first pressure sensitive adhesive 12 may be a patterned structure. Through setting up first pressure sensitive adhesive 12 and being graphical structure, can further improve first pressure sensitive adhesive 12 and alleviate and release display panel and buckle the ability of produced stress of in-process to the vulnerable device such as metal wiring that better protection is located bending area 1, thereby improve whole display panel's reliability and life. In one embodiment, the patterned structure of the first pressure sensitive adhesive 12 includes any one or combination of the following shapes: square, triangular, arc, trapezoidal. It should be understood that, in the embodiment of the present application, the shape of the patterned structure of the first pressure-sensitive adhesive 12 may be selected according to the requirement of the actual application scenario, as long as the selected shape of the patterned structure of the first pressure-sensitive adhesive 12 can not affect the bending of the display panel and can effectively protect and relieve and release the stress generated by the bending of the display panel, and the specific shape of the patterned structure of the first pressure-sensitive adhesive 12 is not limited in the embodiment of the present application.
Fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present disclosure. As shown in fig. 2, the second polarizer 20 may be located only on a single side of the bending region 1 (e.g., the right side of the bending region 1 shown in fig. 2). In this embodiment, the region (i.e., the display region) corresponding to the light emitting device is only disposed in the non-bending region 2 on one side of the bending region 1, and the bending region 1 is close to one side edge of the display panel. In this kind of display panel structure, can only set up second polaroid 20 in order to guarantee display panel's luminous demand in the display area of this unilateral usually, and will appear the space between regional interior polaroid rete of bending region 1 and opposite side and basement membrane layer 3 like this, thereby influence the effect of gluing, secondary that goes on in order to guarantee to glue seals glues seals needs will play to glue, play to glue the in-process blade and probably fish tail screen body, thereby reduce display effect, cause unable demonstration even. In order to solve the problem that the glue sealing effect is not good, this application embodiment extends the polaroid to in the bending area 1, form first polaroid 10 in bending area 1 promptly, utilize first polaroid 10 to reduce the space between polaroid and the basement membrane layer, improve and glue sealing effect, avoid the secondary to glue, and through setting up the less first polaroid 10 of elastic modulus, can utilize the pliability of first polaroid 10, protect easy damage devices and structures such as the metal wiring in bending area 1 as far as possible when not influencing bending effect, thereby improve display panel's reliability and life. It should be understood that, in the embodiment of the present application, the relative positions of the bending region 1 and the display region may be selected according to the requirements of the practical application scene, for example, the bending region 1 may be disposed at one side edge of the display panel (that is, the display region is located in the single-side non-bending region 2 of the bending region 1), or the bending region 1 may be disposed at the middle position of the display panel (that is, the bending region 1 and the non-bending regions 2 on the two sides thereof are both provided with display regions, and the display regions on the two sides are both provided with the second polarizer 20 correspondingly), as long as the relative positions of the selected bending region 1 and the selected display region can meet the requirements of the display panel, the specific relative positions of the bending region 1 and the selected display region are not limited in the embodiment of.
In one embodiment, as shown in fig. 2, the first polarizer 10 may extend to the first molding compound region 4 of the non-bending region on the other side of the bending region. Through extending first polaroid 10 to first seal glue region 4, can utilize first pressure sensitive adhesive 12 of first polaroid 10 to realize the first seal glue region 4 and glue the effect of sealing to reduce and glue the operation, and utilize first pressure sensitive adhesive 12 of first polaroid 10 self-band to realize sealing and glue, can evenly seal the glue, it seals to glue effectually, the problem such as the glue is inhomogeneous of sealing that has avoided the point to glue and bring, thereby the risk of the damage screen body that rises to glue when having avoided secondary to seal the glue brings, when improving and sealing the effect, the risk of damaging the screen body has been avoided. It should be understood that, in the embodiments of the present application, the specific position where the first polarizer 10 extends may be selected according to the requirement of the practical application scenario, as long as the selected specific position where the first polarizer 10 extends can implement the sealing or partial sealing, and the specific position where the first polarizer 10 extends is not limited in the embodiments of the present application. In a further embodiment, the thickness of the first pressure-sensitive adhesive 12 may be equal to the molding thickness of the first molding region 4. The thickness of the first pressure-sensitive adhesive 12 is set to be consistent with the glue sealing thickness of the first glue sealing area 4, so that the first glue sealing area 4 can be guaranteed to be uniformly sealed, the glue sealing effect is guaranteed, meanwhile, the thickness consistency of the display panel can be guaranteed, and the overall reliability of the display panel is guaranteed. It should be understood that the thickness of the first pressure-sensitive adhesive 12 may be selected according to the requirement of the actual application scenario, for example, the thickness of the first pressure-sensitive adhesive 12 is slightly greater than the sealant thickness of the first sealant region 4, because the film layer may have an incomplete flat place in the preparation process, and the first substrate 11 and the first pressure-sensitive adhesive 12 are both made of flexible materials, and the incomplete flat place can be well bonded with the first pressure-sensitive adhesive 12 by extrusion deformation, so that the sealant uniformity is ensured, and the specific thickness of the first pressure-sensitive adhesive 12 is not limited in the embodiment of the present application.
In one embodiment, as shown in fig. 1 and 2, the second polarizer 20 may include a second substrate 21 and a second pressure sensitive adhesive 22, wherein the second substrate and the second pressure sensitive adhesive are stacked. In one embodiment, the second substrate 21 may include a polyethylene terephthalate substrate. Through the laminated structure of the second base material 21 and the second pressure-sensitive adhesive 22, the effective adhesion of the second polarizer 20 and the base film layer can be realized, the combination of the second polarizer 20 and the base film layer is not needed to be realized through other modes, and the preparation process is simplified. It should be understood that the specific structure of the second polarizer 20 may be selected according to the requirements of the practical application scenario, for example, the second polarizer 20 may only include the host material (the second substrate 21, etc.), as long as the selected specific structure of the second polarizer 20 can meet the requirements of the display panel, and the specific structure of the second polarizer 20 is not limited in the embodiments of the present application. The second substrate 21 in this embodiment may include a material with good impact resistance, such as a polyethylene terephthalate substrate, so as to resist external stress of the display panel during use, and the second substrate 21 with good impact resistance and the second pressure sensitive adhesive 22 made of a flexible material are bonded, so as to effectively protect vulnerable devices, such as a light emitting device and a metal trace, in the non-bending region 2, thereby improving reliability and prolonging service life of the entire display panel. It should be understood that in the embodiment of the present application, a material of the second substrate 21 may be selected according to a requirement of an actual application scenario, for example, the second substrate 21 may be made of other materials that have both rigidity and flexibility, as long as the selected material of the second substrate 21 can effectively protect vulnerable devices such as a light emitting device and a metal trace, and the specific material of the second substrate 21 is not limited in the embodiment of the present application.
In an embodiment, as shown in fig. 1 and fig. 2, the second polarizer 20 may also extend to the second encapsulant region 5 away from one side edge of the bending region 1. Through extending the second polaroid 20 to the second glue sealing area 5 far away from the edge of one side of the bending area 1, the second pressure sensitive adhesive 22 of the second polaroid 20 can be used for realizing the glue sealing effect of the second glue sealing area 5, so that the glue sealing operation is reduced, the second pressure sensitive adhesive 22 of the second polaroid 20 is used for realizing the glue sealing, the glue sealing can be uniformly sealed, the glue sealing effect is good, the problems of nonuniform glue sealing and the like caused by glue dispensing are avoided, the risk of damaging a screen body caused by glue rising during secondary glue sealing is avoided, and the risk of damaging the screen body is avoided while the glue sealing effect is improved. It should be understood that, in the embodiment of the present application, the specific position where the second polarizer 20 extends may be selected according to the requirement of the practical application scenario, as long as the selected specific position where the second polarizer 20 extends can implement the sealing or partial sealing, and the specific position where the second polarizer 20 extends is not limited in the embodiment of the present application.
In a further embodiment, the thickness of the second pressure-sensitive adhesive 22 can be equal to the molding thickness of the second molding region 5. By setting the thickness of the second pressure-sensitive adhesive 22 to be consistent with the sealing adhesive thickness of the second sealing adhesive area 5, uniform sealing of the second sealing adhesive area 5 can be ensured, so that the sealing adhesive effect is ensured, and meanwhile, the thickness consistency of the display panel can also be ensured, so that the overall reliability of the display panel is ensured. It should be understood that the thickness of the second pressure-sensitive adhesive 22 can be selected according to the requirements of the actual application scenario, for example, the thickness of the second pressure-sensitive adhesive 22 is slightly greater than the sealant thickness of the second sealant region 5, and it can be ensured that the incompletely flat place can be well bonded with the second pressure-sensitive adhesive 22 by extrusion deformation, so as to ensure the uniformity of sealant, and the specific thickness of the second pressure-sensitive adhesive 22 is not limited in the embodiments of the present application.
In one embodiment, the thickness of the second substrate 21 may be 75 microns, and the thickness of the second pressure sensitive adhesive 22 may be 25 microns. It should be understood that the thicknesses of the second substrate 21 and the second pressure-sensitive adhesive 22 may be selected according to the requirements of practical application scenarios, as long as the selected thicknesses of the second substrate 21 and the second pressure-sensitive adhesive 22 can meet the requirements of the display panel, and the specific thicknesses of the second substrate 21 and the second pressure-sensitive adhesive 22 are not limited in the embodiments of the present application.
An embodiment of the present invention further provides a display device including the display panel of any one of the above. According to the display device provided by the embodiment of the invention, the first polaroid is arranged in the bending area, the second polaroid is arranged in the non-bending area, and the elastic modulus of the first polaroid is less than or equal to that of the second polaroid, so that the gap between the polaroid layer and the base film layer can be reduced by using the first polaroid, the sealing effect is improved, and secondary sealing is avoided; and the first polaroid with smaller elastic modulus can effectively protect the metal wiring and other structures in the bending area without influencing folding, thereby improving the reliability and prolonging the service life of the whole display panel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.

Claims (10)

1. A display panel, comprising:
the bending area and the non-bending areas are arranged on two sides of the bending area;
the first polaroid is arranged in the bending area; and
the second polaroid is arranged in the non-bending area;
and the elastic modulus of the first polarizer is less than or equal to that of the second polarizer.
2. The display panel of claim 1, wherein the first polarizer comprises a first substrate and a first pressure sensitive adhesive in a stacked arrangement, wherein the first substrate comprises a flexible material.
3. The display panel according to claim 2, wherein the first substrate comprises a polyimide substrate.
4. The display panel of claim 2, wherein the first pressure sensitive adhesive is a patterned structure.
5. The display panel of claim 4, wherein the patterned structure comprises any one or combination of the following shapes: square, triangular, arc, trapezoidal.
6. The display panel of claim 1, wherein the second polarizer is disposed only in the non-bending region on one side of the bending region, and the first polarizer extends to the first sealing region of the non-bending region on the other side of the bending region.
7. The display panel of claim 6, wherein a thickness of the first pressure sensitive adhesive is equal to a sealant thickness of the first sealant region.
8. The display panel of claim 1, wherein the second polarizer comprises a second substrate and a second pressure sensitive adhesive, and wherein the second substrate and the second pressure sensitive adhesive are stacked.
9. The display panel of claim 8, wherein the second substrate has a thickness of 75 microns and the second pressure sensitive adhesive has a thickness of 25 microns.
10. A display device comprising the display panel according to any one of claims 1 to 9.
CN201911367085.6A 2019-12-26 2019-12-26 Display panel and display device Pending CN111028677A (en)

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Application Number Priority Date Filing Date Title
CN201911367085.6A CN111028677A (en) 2019-12-26 2019-12-26 Display panel and display device

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Application Number Priority Date Filing Date Title
CN201911367085.6A CN111028677A (en) 2019-12-26 2019-12-26 Display panel and display device

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Publication Number Publication Date
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Cited By (2)

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CN113433731A (en) * 2021-06-29 2021-09-24 武汉华星光电半导体显示技术有限公司 Display module and mobile terminal
CN114203050A (en) * 2021-12-28 2022-03-18 武汉华星光电半导体显示技术有限公司 Display module and display terminal

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Publication number Priority date Publication date Assignee Title
CN113433731A (en) * 2021-06-29 2021-09-24 武汉华星光电半导体显示技术有限公司 Display module and mobile terminal
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CN114203050A (en) * 2021-12-28 2022-03-18 武汉华星光电半导体显示技术有限公司 Display module and display terminal
CN114203050B (en) * 2021-12-28 2023-11-28 武汉华星光电半导体显示技术有限公司 Display module and display terminal

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Application publication date: 20200417

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