CN115064078B - Display panel, preparation method of display panel and display device - Google Patents
Display panel, preparation method of display panel and display device Download PDFInfo
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- CN115064078B CN115064078B CN202210787881.0A CN202210787881A CN115064078B CN 115064078 B CN115064078 B CN 115064078B CN 202210787881 A CN202210787881 A CN 202210787881A CN 115064078 B CN115064078 B CN 115064078B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The embodiment of the application provides a display panel, a preparation method of the display panel and a display device, wherein the display panel comprises a plane area and a bending area, and the display panel comprises a flexible substrate, a first supporting body and a second supporting body; the flexible substrate comprises a first area, a second area and a third area connected with the first area and the second area; the first support body is arranged in the first area of the flexible substrate, the second support body is arranged in the second area of the flexible substrate, and the first support body and the second support body are used for supporting and protecting the flexible substrate; wherein the third region is folded so that the second region of the flexible substrate is folded back to at least partially overlap the first region, and the second support comprises a first portion located at the folding region; the modulus of the second support body is larger than that of the first support body, so that the second support body can maintain a profiling shape after yielding deformation, and the profiling effect is better; the display panel deformation and uneven display caused by different copying and designs of the support body can be solved.
Description
[ field of technology ]
The present disclosure relates to the field of display technologies, and in particular, to a display panel, a method for manufacturing the display panel, and a display device.
[ background Art ]
With the continuous development of display technology, flexible display technology has received more and more attention, so that higher requirements are also put on display performance of flexible display panels.
In the prior art, multi-curved screen displays have been implemented. The realization of the multi-curved-surface screen display panel solves the problem that the display panel has visual effect difference when a user watches the screen from the side. However, in actual production and life, the display panel of the multi-curved screen is found to deform when in operation, so that the display panel has visual effect difference and uneven display, and the display effect of the display panel is affected.
[ MEANS FOR SOLVING PROBLEMS ]
In view of this, embodiments of the present application provide a display panel, a method for manufacturing the display panel, and a display device.
In a first aspect, the present application provides a display panel, including a planar region and a bending region; the display panel includes:
a flexible substrate comprising a first region, a second region, and a third region connecting the first region and the second region;
a first support disposed at the first region of the flexible substrate;
a second support disposed in the second region of the flexible substrate;
wherein the third region is folded such that the second region of the flexible substrate is folded back to at least partially overlap the first region, the second support including a first portion at the fold region; the modulus of the second support is greater than the modulus of the first support.
In one implementation of the first aspect, the display panel further includes a display device disposed on one side of the flexible substrate;
the first support body and the second support body are arranged on one side of the flexible substrate far away from the display device.
In an implementation manner of the first aspect, the display panel further includes a planar area; the second support further includes a second portion located in the planar region when the second region of the flexible substrate is folded back to at least partially overlap the first region;
and a chip or a flexible printed circuit board is bound on the area of the flexible substrate where the second part is arranged.
In one implementation of the first aspect, the first support includes a portion located at the inflection region;
the first support body covers the planar region, and the second support body overlaps a partial region of the planar region.
In one implementation manner of the first aspect, the modulus of the second support is 2GPa to 300GPa.
In one implementation manner of the first aspect, the material of the second support is at least one of a metal and an alloy material.
In one implementation manner of the first aspect, the first support is one of PET and acryl.
In one implementation manner of the first aspect, the second support body is retracted by 0 to 0.05mm relative to the first support body.
In a second aspect, the present application provides a method for preparing a display panel, for preparing the display panel provided in the first aspect; the method comprises the following steps:
providing a flexible substrate comprising a first region and a second region;
providing a first support, and arranging the first support in the first area of the flexible substrate;
providing a second support, and arranging the second support in the second area of the flexible substrate;
the second region of the flexible substrate is folded back to at least partially overlap the first region, and the second support includes a first portion located at the fold region.
In one implementation of the second aspect, before the second region of the flexible substrate is folded back to at least partially overlap the first region, the method further comprises:
profiling the second support body, so that the shape of the first part in the profiled second support body is the same as the preset shape.
In a third aspect, the present application provides a display device comprising a display panel as provided in the first aspect.
According to the display panel, the preparation method of the display panel and the display device, the modulus of the second support body is increased, and the second support body is profiled by the profiling jig before the flexible substrate is bent, so that the second support body is enabled to yield and deform, the shape of the first part in the second support body is identical to the preset shape, and the manufacturing process precision is consistent with the design; the rebound phenomenon of the second support body caused by small modulus is avoided, the problem of abnormal profiling caused by material characteristics and a manufacturing process is solved, the display performance of the display panel is improved, and the normal display of the display panel is further realized.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of the display panel of FIG. 1 along the direction of MN;
FIG. 3 is an enlarged view of a portion I of FIG. 2;
FIG. 4 is an enlarged view of a portion of the first support and the second support of FIG. 3;
fig. 5 is a plan view of a display panel according to an embodiment of the present invention;
fig. 6 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 7 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a display device according to an embodiment of the invention.
[ detailed description ] of the invention
For a better understanding of the technical solutions of the present application, embodiments of the present application are described in detail below with reference to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which would be apparent to one of ordinary skill in the art without making any inventive effort, are intended to be within the scope of the present application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the present specification, it is to be understood that the terms "substantially," "approximately," "about," "approximately," "substantially," and the like as used in the claims and examples herein refer to values that are generally agreed upon, rather than exact, within reasonable process operating ranges or tolerances.
It should be understood that although the terms first, second, etc. may be used in embodiments of the present application to describe a support, region, etc., these supports, region, etc. should not be limited by these terms. These terms are only used to distinguish one support, region, etc. from another. For example, a first support may also be referred to as a second support, and similarly, a second support may also be referred to as a first support, without departing from the scope of embodiments of the present application.
The applicant has provided a solution to the problems existing in the prior art by intensive studies.
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a cross-sectional view of the display panel shown in fig. 1 along the MN direction.
As shown in fig. 1 and 2, the display panel 100 provided in the embodiment of the invention includes a planar area PA and a bending area BA.
Specifically, the flat area PA is a display area of the display panel 100 that realizes a main display function and generally has a light-emitting surface facing an upper surface of the display panel 100, and the folded area BA is an area having a certain folding angle with respect to the flat area PA and generally serves as a side surface of the display panel 100. That is, as shown in fig. 2, the normal direction X of the light-emitting surface of the bending area BA intersects with the normal direction Y of the light-emitting surface of the plane area PA.
Fig. 3 is a partial enlarged view of the portion I in fig. 2. Fig. 4 is a partial enlarged view of the first support body and the second support body in fig. 3.
As shown in fig. 3, the display panel 100 provided in the embodiment of the invention includes a flexible substrate 10, a first supporting body 11 and a second supporting body 12.
The flexible substrate 10 includes a first region 01, a second region 02, and a third region 03 connecting the first region 01 and the second region 02.
The first support 11 is disposed in the first region 01 of the flexible substrate 10; a first region 01 for supporting the flexible substrate 10.
The second support 12 is disposed in the second region 02 of the flexible substrate 10; a second region 02 for supporting the flexible substrate 10.
Wherein, when the third region 03 is folded so that the second region 02 of the flexible substrate 10 is folded back to at least partially overlap the first region 01, as shown in fig. 4, the second support 12 includes a first portion 121 located at the folded region BA, and further, the second support 12 includes a second portion 122 located at the planar region PA, and the modulus of the second support 12 is greater than the modulus of the first support 11.
The inventor has found through analysis of the display panel 100 and the operation process thereof that the first support 11 disposed in the first region 01 of the flexible substrate 10 and the second support 12 disposed in the second region 02 of the flexible substrate 10 are made of the same material, and the modulus of the first support 11 and the second support 12 are the same, and the yield deformation capability is the same. Because of the elasticity of the stacking material between the first supporting body 11 and the second supporting body 12 of the display panel 100 and the modulus limitation of the first supporting body 11 and the second supporting body 12, the first portion 121 of the second supporting body 12 located in the bending area BA tends to be straight, which results in poor appearance and design of the display panel 100, inconsistent manufacturing process precision and design, and thus the display panel 100 is easy to deform, and the normal display of the display panel 100 is seriously affected.
Based on the above-mentioned problems and analysis of the cause of the above-mentioned problems, in the present technical solution, the modulus of the second support body 12 is set to be greater than the modulus of the first support body 11, so that the second support body 12 can maintain the profiling effect after yielding and deforming, reduce the problem of abnormal profiling of the display panel 100 caused by stress rebound, improve the display performance of the display panel 100, and realize normal display of the display panel 100. In addition, in order to facilitate the manufacture and implementation of the display panel 100, the first supporting body 11 may be made of materials in the prior art, and the second supporting body 12 is made of materials having a modulus greater than that of the first supporting body 11.
Optionally, the method comprises the step of. The first support 11 is one of PET and acryl. Wherein the PET is polyethylene terephthalate (Polyethylene terephthalate, PET). The first support 11 is made of PET or acryl having high flexibility, and can improve the impact resistance of the flexible display panel 100 and prevent the flexible substrate 10 from being damaged by external force.
Optionally, the material of the second support 12 is at least one of a metal and an alloy material.
The modulus of the metal and alloy materials is larger than that of PET and acrylic, and the metal and alloy materials are not easy to rebound after yielding deformation, so that the metal and alloy materials have better profiling effect.
As shown in fig. 3, in one embodiment of the present application, the display panel 100 further includes a display device 14, the display device 14 being disposed on one side of the flexible substrate 10. The display device 14 provided in the display panel 100 is for realizing a display function of the display panel 100.
When the third region 03 is not bent, the first support 11 and the second support 12 are disposed on the side of the flexible substrate 10 away from the display device 14. That is, as shown in fig. 3, when the third region 03 is bent, the first support 11 and the second support 12 may be both located inside the flexible substrate 10.
In this embodiment, the first supporting body 11 and the second supporting body 12 are disposed on the inner side of the flexible substrate 10 when bending, so that the width of the bending area BA can be reduced, and the frame of the display panel 100 is narrower.
In one embodiment of the present application, as shown in connection with fig. 1 and 4, the display panel 100 further includes a planar area PA. When the second region 02 of the flexible substrate 10 is folded back to at least partially overlap the first region 01, the second support 12 further includes a second portion 122 located in the planar area PA; and a chip or a flexible printed circuit board is bonded to the flexible substrate 10 in a region where the second portion 122 is disposed.
In the embodiment of the present application, the second portion 122 of the second support 12 is relatively flat, and the area of the flexible substrate 10 where the second portion 122 is disposed may be relatively flat. The area of the flexible substrate 10 where the second portion 122 is disposed is bound with a chip or a flexible printed circuit board, which is advantageous in ensuring stability of the chip or the flexible printed circuit board and preventing the chip or the flexible printed circuit board from being deformed. In addition, the binding of the chip or the flexible printed circuit board to the second portion 122 of the flexible substrate 10 that can be folded back is advantageous for saving space resources of the display panel 100.
In this embodiment of the present application, the second support body 12 may be made of metal or alloy, and because the thermal conductivity of the metal or alloy is higher, the area where the second portion 122 is disposed on the flexible substrate 10 is bound with the chip or the flexible printed circuit board, so that the heat generated by the chip or the flexible printed circuit board can be effectively conducted, and the problem of local heat generation of the chip or the flexible printed circuit board is improved.
Further, with continued reference to fig. 4, the first supporting body 11 includes a portion located at the bending area BA, and the first supporting body 11 covers the plane area PA, and the second supporting body 12 overlaps a partial area of the plane area PA. I.e. in the normal direction Y of the plane area PA, the projection of the first support 11 covers the projection of the plane area PA, and the projection of the second support 12 overlaps the projection of a partial area of the plane area PA.
It will be appreciated that the portion of the second support 12 overlapping the partial region of the planar area PA may be the second portion 122 of the second support 12 located in the planar area PA.
In this embodiment, as shown in fig. 4, a part of the first supporting body 11 is located in the bending area BA, and another part is located in the plane area PA and covers the plane area PA; the first supporting body 11 can support and protect the bending area BA and the plane area PA in the display panel 100, so that the display panel 100 is not easy to deform, and the display performance of the display panel 100 is improved.
In addition, the second support 12 overlaps with a partial area of the planar area PA, that is, the second support 12 includes the second portion 122 located in the planar area PA, so that an area of the flexible substrate 10 where the second portion 122 is disposed is relatively flat, and when the area of the flexible substrate 10 where the second portion 122 is disposed is bound to a chip or a flexible printed circuit board, stability of the chip or the flexible printed circuit board can be ensured, and deformation of the chip or the flexible printed circuit board can be prevented.
In one embodiment of the present application, the modulus of the second support 12 may range from 2GPa to 300GPa, where modulus refers to the ratio of stress to strain of a material under stress.
The second supporting body 12 can be made of materials with the modulus in the above range, so that the second supporting body 12 is not easy to rebound after yielding deformation, a good profiling effect is achieved, and the problem of abnormal profiling of the display panel 100 is avoided.
Fig. 5 is a plan view of a display panel according to an embodiment of the present invention.
As shown in fig. 5, in one embodiment of the present application, the second support 12 is retracted by 0 to 0.05mm relative to the first support 11.
Specifically, as shown in FIG. 5, the second support body 12 is retracted inward with respect to the first support body 11 along the first direction Z by a length d1,0 < d1.ltoreq.0.05 mm. The first direction Z may intersect the arrangement direction of the first support 11 and the second support 12 when not bent.
In the present solution, the second supporting body 12 is set to shrink by 0.05mm relative to the first supporting body 11, so that the display panel 100 can be smoothly cut without damaging the second supporting body 12, and further, the problem of deformation of the display panel 100 caused by damaging the second supporting body 12 is avoided.
Fig. 6 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention.
As shown in fig. 6, an embodiment of the present invention provides a method for manufacturing a display panel 100, which may be used to manufacture the display panel 100 provided in any one of the above embodiments. The following describes the steps of the method for manufacturing the display panel 100 with reference to fig. 3 and 6:
step S1, providing a flexible substrate 10.
In this step, the flexible substrate 10 provided includes a first region 01, a second region 02, and a third region 03, and the first region 01 is connected to the second region 02 via the third region 03.
Step S2, providing a first support 11.
In this step, the first support 11 is disposed on the first region 01 of the flexible substrate 10, and the first support 11 is used to support the first region 01 of the flexible substrate 10.
Step S3, providing a second support 12.
In this step, the second support 12 is disposed in the second region 02 of the flexible substrate 10, and the second support 12 is used to support the second region 02 of the flexible substrate 10.
Step S4, the second region 02 of the flexible substrate 10 is folded back to at least partially overlap the first region 01.
In this step, as shown in fig. 3 and 6, the second region 02 of the flexible substrate 10 is bent in the direction of the first region 01, so that the second region 02 of the flexible substrate 10 overlaps at least partially the first region 01 after being bent. At this time, as shown in fig. 4, the second support 12 includes a first portion 121 located at the inflection zone BA.
By the above-described manufacturing method, the display panel 100 provided in any one of the above-described embodiments can be manufactured. In the above preparation method, the first supporting body 11 may be formed by using a PET material or an acryl material with a small modulus and a large flexibility, and the second supporting body 12 may be formed by using a metal material or an alloy material with a large modulus and a small flexibility. Disposing a first support 11 at a first region 01 of the flexible substrate 10; the first support 11 serves to support and protect the first region 01 of the flexible substrate 10. Disposing a second support 12 at a second region 02 of the flexible substrate 10; the second support 12 serves to support and protect the second region 02 of the flexible substrate 10. The second region 02 of the flexible substrate 10 is folded back to at least partially overlap with the first region 01, so as to complete the bending action of the flexible substrate 10, thereby realizing the preparation of the display panel 100 provided by the embodiment of the invention.
Fig. 7 is a flowchart of a method for manufacturing a display panel according to an embodiment of the present invention.
As shown in fig. 7, in one embodiment of the present application, before the second region 02 of the flexible substrate 10 is folded back to at least partially overlap the first region 01, that is, before performing step S4 shown in fig. 6, the manufacturing method of the display panel 100 further includes:
step S3A: the second support 12 is profiled such that the shape of the first portion 121 of the profiled second support 12 is the same as the predetermined shape.
In the embodiment of the application, the second support body 12 with larger modulus is subjected to yielding deformation by using the profiling jig 13, so that profiling work of the second support body 12 is completed, the shape of the first part 121 in the second support body 12 after profiling is the same as the preset shape, and the problem of deformation of the display panel 100 caused by the difference between the shape of the first part 121 in the second support body 12 and the preset shape is avoided. It can be understood that, by profiling the second support body 12 with a larger modulus, not only the shape of the first portion 121 in the second support body 12 after profiling is the same as the preset shape, but also the profiling effect of the second support body 12 can be maintained, and the abnormal problem of profiling of the flexible substrate 10 caused by stress rebound can be avoided.
Fig. 8 is a schematic diagram of a display device according to an embodiment of the invention.
As shown in fig. 8, the embodiment of the present application further provides a display device, including the display panel 100 and the housing 200 provided in the foregoing embodiments, where the housing 200 forms a receiving space for receiving the display panel 100, and the housing 200 may be hard or flexible, which is not particularly limited in the present invention. It can be understood that the display device provided by the embodiment of the invention can be a display device with display functions such as a computer, a television, a vehicle, a wearable device, an artificial intelligence device and the like, and the invention is not particularly limited to the display device.
According to the display device provided by the embodiment of the invention, the modulus of the second support body 12 is increased, and the second support body 12 is profiled by using the profiling jig before the flexible substrate 10 is bent, so that the second support body 12 is deformed in yield, the shape of the first part 121 in the second support body 12 is identical to the preset shape, and the manufacturing process precision is consistent with the design; the rebound phenomenon of the second support body 12 caused by small modulus is avoided, the problem of profiling abnormality caused by material characteristics and a manufacturing process is solved, the display performance of the display panel 100 is improved, and the normal display of the display panel 100 is further realized.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The display panel is characterized by comprising a plane area and a bending area; the display panel includes:
a flexible substrate comprising a first region, a second region, and a third region connecting the first region and the second region;
a first support disposed at the first region of the flexible substrate;
a second support disposed in the second region of the flexible substrate;
wherein the third region is folded such that the second region of the flexible substrate is folded back to at least partially overlap the first region, the second support including a first portion at the fold region; the modulus of the second support is greater than the modulus of the first support;
the display panel further comprises a display device, wherein the display device is arranged on one side of the flexible substrate;
the first support body and the second support body are arranged on one side of the flexible substrate away from the display device; the second support further includes a second portion located in the planar region when the second region of the flexible substrate is folded back to at least partially overlap the first region;
a chip or a flexible printed circuit board is bound to the area of the flexible substrate where the second part is arranged;
the first support body comprises a part positioned in the bending area;
the first support body covers the plane area, and the second support body is overlapped with a part of the plane area;
the display device is arranged in the first area of the flexible substrate;
the display device comprises a part positioned in the plane area and a part positioned in the bending area, the part positioned in the bending area of the display device at least partially overlaps with the part positioned in the bending area of the first support body, and the part positioned in the bending area of the display device at least partially overlaps with the first part positioned in the bending area of the second support body;
the second support body is retracted by 0-0.05 mm relative to the first support body.
2. The display panel according to claim 1, wherein the modulus of the second support is 2GPa to 300GPa.
3. The display panel according to claim 2, wherein the material of the second support is at least one of a metal and an alloy material.
4. The display panel according to claim 3, wherein the first support is one of PET and acryl.
5. A method for manufacturing a display panel, characterized by being used for manufacturing the display panel according to any one of claims 1 to 4; the method comprises the following steps:
providing a flexible substrate comprising a first region and a second region;
providing a first support, and arranging the first support in the first area of the flexible substrate;
providing a second support, and arranging the second support in the second area of the flexible substrate;
the second region of the flexible substrate is folded back to at least partially overlap the first region, and the second support includes a first portion located at the fold region.
6. The method of manufacturing of claim 5, wherein prior to reverse folding the second region of the flexible substrate to at least partially overlap the first region, the method further comprises:
profiling the second support body, so that the shape of the first part in the profiled second support body is the same as the preset shape.
7. A display device comprising a display panel as claimed in any one of claims 1-4.
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| CN202210787881.0A CN115064078B (en) | 2022-07-04 | 2022-07-04 | Display panel, preparation method of display panel and display device |
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