CN114220342A - Flexible display module and display device - Google Patents
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- CN114220342A CN114220342A CN202111255444.6A CN202111255444A CN114220342A CN 114220342 A CN114220342 A CN 114220342A CN 202111255444 A CN202111255444 A CN 202111255444A CN 114220342 A CN114220342 A CN 114220342A
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Classifications
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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 disclosure relates to the technical field of display, and discloses a flexible display module and a display device; the flexible display module comprises a flexible display panel and a strain rate sensitive layer; the strain rate sensitive layer is arranged on one side of the flexible display panel, and the modulus of the strain rate sensitive layer increases along with the increase of the strain rate. When the flexible display module is folded, the strain rate is low, the modulus of the strain rate sensitive layer is small, and the flexible display module has good flexibility and is easy to fold; the strain rate sensitive layer presents a glass state at a high strain rate, and the strain rate sensitive layer has a large modulus and is not easy to deform, so that when the strain rate sensitive layer is subjected to external impact load, the strain rate sensitive layer presents small strain and has good impact resistance, and the impact resistance of the whole flexible display module is improved; and the flexible display panel below the strain rate sensitive layer can be effectively protected.
Description
Technical Field
The utility model relates to a show technical field, particularly, relate to a flexible display module assembly and including display device of this flexible display module assembly.
Background
At present, flexible display devices are developing day by day, and folding display devices have started to enter mass production, and there are two important development directions for folding display devices: on one hand, the folding display device is made of a large amount of flexible materials, and the impact resistance of the folding display device is weaker than that of a traditional rigid screen, so that the impact resistance of the folding display device is urgently required to be improved; however, the foldable display device needs to have sufficient flexibility to ensure the folding performance and sufficient rigidity to improve the impact resistance, and thus the folding performance and the impact resistance are contradictory. On the other hand, the foldable display device requires a smaller and smaller bending radius to improve portability, but the film layer of the foldable display device is easily peeled off or broken after the bending radius is reduced.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The purpose of the present disclosure is to overcome the shortcoming of weak impact resistance in the prior art, and provide a flexible display module with strong impact resistance and a display device including the flexible display module.
According to an aspect of the present disclosure, there is provided a flexible display module including:
a flexible display panel;
and the strain rate sensitive layer is arranged on one side of the flexible display panel, and the modulus of the strain rate sensitive layer is increased along with the increase of the strain rate.
In an exemplary embodiment of the present disclosure, the material of the strain rate sensitive layer includes one or more of polyvinyl butyral, ethylene-vinyl acetate copolymer, and polyurethane.
In an exemplary embodiment of the present disclosure, the flexible display module further includes:
the ultrathin glass layer is arranged on one side of the strain rate sensitive layer far away from the flexible display panel;
and the buffer coating is coated on one side of the ultrathin glass layer far away from the flexible display panel.
In an exemplary embodiment of the present disclosure, a material of the buffer coating includes one or more of polyimide, polyethylene terephthalate, thermoplastic polyurethane, and polymethyl methacrylate.
In an exemplary embodiment of the present disclosure, the flexible display module further includes:
and the protective film layer is arranged on one side of the ultrathin glass layer close to the flexible display panel.
In an exemplary embodiment of the present disclosure, the strain rate sensitive layer is coated on one side of the protective film layer close to the ultra-thin glass layer, a first adhesive layer is arranged between the strain rate sensitive layer and the ultra-thin glass layer, and a second adhesive layer is arranged between the protective film layer and the flexible display panel; or the strain rate sensitive layer is coated on one side, far away from the ultrathin glass layer, of the protective film layer, a third bonding layer is arranged between the strain rate sensitive layer and the flexible display panel, and a fourth bonding layer is arranged between the protective film layer and the ultrathin glass layer.
In an exemplary embodiment of this disclosure, the sensitive layer of strain rate includes the sensitive layer of first strain rate and the sensitive layer of second strain rate, the sensitive layer of first strain rate coat in the protection rete is close to one side of ultra-thin glass layer, the sensitive layer of second strain rate coat in keeping away from of protection rete one side of ultra-thin glass layer, the sensitive layer of first strain rate with be provided with first adhesive linkage between the ultra-thin glass layer, the sensitive layer of second strain rate with be provided with the second adhesive linkage between the flexible display panel.
In an exemplary embodiment of the present disclosure, the strain rate sensitive layer includes a first strain rate sensitive layer and a second strain rate sensitive layer, the first strain rate sensitive layer is coated on one side of the ultra-thin glass layer close to the flexible display panel, the second strain rate sensitive layer is coated on one side of the flexible display panel close to the ultra-thin glass layer, and an adhesive layer is disposed between the first strain rate sensitive layer and the second strain rate sensitive layer.
In an exemplary embodiment of the present disclosure, the flexible display module further includes:
the polaroid is arranged on one side, close to the strain rate sensitive layer, of the flexible display panel;
the back film is arranged on one side of the flexible display panel far away from the strain rate sensitive layer;
the back support film is arranged on one side of the back film, which is far away from the flexible display panel.
According to another aspect of the present disclosure, there is provided a display device including: the flexible display module of any preceding item.
According to the flexible display module, the strain rate sensitive layer is arranged on one side of the flexible display panel, and the modulus of the strain rate sensitive layer is increased along with the increase of the strain rate; when the flexible display module is folded, the strain rate is low, the modulus of the strain rate sensitive layer is small, and the flexible display module has good flexibility and is easy to fold; the strain rate sensitive layer presents a glass state at a high strain rate, and the strain rate sensitive layer has a large modulus and is not easy to deform, so that when the strain rate sensitive layer is subjected to external impact load, the strain rate sensitive layer presents small strain and has good impact resistance, and the impact resistance of the whole flexible display module is improved; and the flexible display panel below the strain rate sensitive layer can be effectively protected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic structural diagram of an exemplary embodiment of a flexible display module in the related art.
Fig. 2 is a schematic structural view of the flexible display module in fig. 1 after being bent.
Fig. 3 is a schematic structural diagram of another exemplary embodiment of a flexible display module in the related art.
Fig. 4 is a schematic structural view of the flexible display module in fig. 3 after being bent.
Fig. 5 is a schematic structural diagram of a first exemplary embodiment of a flexible display module according to the present disclosure.
FIG. 6 is a plot of storage modulus versus frequency for thermoplastic polyurethanes obtained by DMA testing.
FIG. 7 is a graph of the change in modulus of polyurethane at different strain rates.
Fig. 8 is a schematic structural diagram of a flexible display module according to a second exemplary embodiment of the disclosure.
Fig. 9 is a schematic structural diagram of a flexible display module according to a third exemplary embodiment of the present disclosure.
FIG. 10 is a diagram illustrating a comparison between the falling ball impact simulation of the flexible display module shown in FIG. 9 and the falling ball impact simulation of the flexible display module shown in FIG. 1.
Fig. 11 is a schematic structural diagram of a fourth exemplary embodiment of a flexible display module according to the present disclosure.
Description of reference numerals:
1. a back support film; 2. a back film; 3. a flexible display panel; 4. a polarizer;
5. an adhesive layer; 51. a first adhesive layer; 52. a second adhesive layer; 53. a third adhesive layer; 54. A fourth adhesive layer;
6. a strain rate sensitive layer; 61. a first strain rate sensitive layer; 62. a second strain rate sensitive layer;
7. a protective film layer; 8. an ultra-thin glass layer; 9. a buffer coating;
101. a first polymer film layer; 102. and a second polymer film layer.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted. Furthermore, the drawings are merely schematic illustrations of the disclosure and are not necessarily drawn to scale.
Although relative terms, such as "upper" and "lower," may be used herein to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.
The terms "a," "an," "the," "said," and "at least one" are used to indicate the presence of one or more elements/components/parts/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and are not limiting on the number of their objects.
Referring to fig. 1, the flexible display module may include a back support film 1, a back film 2 disposed on one side of the back support film 1, a flexible display panel 3 disposed on one side of the back film 2 away from the back support film 1, a polarizer 4 disposed on one side of the flexible display panel 3 away from the back support film 1, a first adhesive layer 51 disposed on one side of the polarizer 4 away from the back support film 1, an ultra-thin glass layer 8 disposed on one side of the first adhesive layer 51 away from the back support film 1, a second adhesive layer 52 disposed on one side of the ultra-thin glass layer 8 away from the back support film 1, and a first polymer film layer 101 disposed on one side of the second adhesive layer 52 away from the back support film 1. Referring to fig. 2, when the flexible display module is folded, since the first polymer film layer 101 on the inner side of the flexible display module is under the action of pressure, according to the euler formula, the buckling critical load is in direct proportion to the modulus of the film material and the thickness of the film material, and after the pressure load exceeds the buckling critical load of the first polymer film layer 101, the first polymer film layer 101 can buckle, wrinkle and peel off, thereby causing the failure of the screen.
Referring to fig. 3, a first polymer film layer 101 is provided on the side of the first adhesive layer 51 away from the back support film 1, a second adhesive layer 52 is provided on the side of the first polymer film layer 101 away from the back support film 1, and a second polymer film layer 102 is provided on the side of the second adhesive layer 52 away from the back support film 1. Referring to fig. 4, the first polymer film layer 101 and the second polymer film layer 102 may be buckled, wrinkled and peeled off, thereby causing a screen failure.
The inventor finds that: the first polymer film layer 101 and the second polymer film layer 102, which are subjected to buckling wrinkle and peeling, are bonded together by an adhesive layer.
The present disclosure example embodiments provide a flexible display module, which may include, as shown in fig. 5, a flexible display panel 3 and a strain rate sensitive layer 6; the strain rate sensitive layer 6 is provided on one side of the flexible display panel 3, and the modulus of the strain rate sensitive layer 6 increases with increasing strain rate.
According to the flexible display module, when the flexible display module is folded, the strain rate is low, the modulus of the strain rate sensitive layer 6 is low, and the flexible display module has good flexibility and is easy to fold; the strain rate sensitive layer 6 presents a glass state at a high strain rate, and the strain rate sensitive layer 6 has a large modulus and is not easy to deform, so that when the strain rate sensitive layer 6 is subjected to external impact load, the strain rate sensitive layer 6 presents small strain and has good impact resistance, and the impact resistance of the whole flexible display module is improved; but also the flexible display panel 3 below the strain rate sensitive layer 6.
As shown with reference to fig. 5-11; the flexible display module can comprise a back support film 1, and the material of the back support film 1 can be metal aluminum, metal titanium, carbon fiber and the like; a back film 2 is arranged on one side of the back support film 1, and the material of the back film 2 can be PI (polyimide), PET (polyethylene terephthalate) and the like; a flexible Display panel 3 is disposed on a side of the back film 2 away from the back support film 1, and the flexible Display panel 3 may be an OLED (Organic Light Emitting semiconductor) Display panel, a QLED (Quantum Dot Light Emitting diode) Display panel, or the like.
Taking the OLED display panel as an example, the flexible display panel 3 may include a substrate layer, a plurality of switch units disposed on a side of the substrate layer away from the back support film 1, and a plurality of switch units arranged in an array; a first electrode, a pixel dielectric layer, a light emitting layer, and a second electrode are sequentially stacked on one side of the plurality of switching units away from the back support film 1; the first electrode may be an anode, electrically connected to the switching unit; the second electrode may be a cathode.
A polarizer 4 is arranged on the side of the flexible display panel 3 remote from the back support film 1.
Referring to fig. 5, a first adhesive layer 51 is disposed on a side of the polarizer 4 away from the back support film 1, and the first adhesive layer 51 may be an oca (optical Clear adhesive) optical adhesive. A protection film layer 7 is disposed on a side of the first adhesive layer 51 away from the back support film 1, the material of the protection film layer 7 may be PI (polyimide), PET (polyethylene terephthalate), or the like, that is, the protection film is adhered to the polarizer 4 through the first adhesive layer 51.
The side of the protective film layer 7 far away from the back support film 1 is coated with the strain rate sensitive layer 6, namely the strain rate sensitive layer 6 is coated on the side of the protective film layer 7 close to the ultrathin glass layer 8 through a coating process, so that the use of bonding layer bonding is avoided, and the risk of buckling and peeling of the film layer bonded by the bonding layer is avoided.
The material of the strain rate sensitive layer 6 may be one or more of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), Polyurethane (PU), and the like, that is, the material of the strain rate sensitive layer 6 may be one of pure materials of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), and Polyurethane (PU), or a mixture of multiple materials of polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), and Polyurethane (PU); the strain rate sensitive layer 6 may also be a multi-layer composite layer made of a simple material, for example, the strain rate sensitive layer 6 may include a PVB layer and an EVA layer, and other combination forms, which are not described herein again. When Polyurethane (PU) is selected, Thermoplastic Polyurethane (TPU) may be specifically selected.
The modulus of the strain rate sensitive layer 6 increases with increasing strain rate, i.e. the glass transition of the strain rate sensitive layer has a typical correlation with the strain rate. The storage modulus as a function of frequency is obtained by DMA (Dynamic thermal mechanical analysis) testing with reference to the thermoplastic polyurethane shown in FIG. 6. Dynamic thermomechanical analysis (DMA) measures the mechanical properties of viscoelastic materials as a function of time, temperature or frequency. The sample is subjected to and controlled by mechanical stress which varies periodically (sinusoidally), and deforms. Storage modulus (storage modulus) is substantially young's modulus, is an index of rebound after deformation of a material, and indicates the ability of the material to store elastic deformation energy. The strain rate refers to the linear strain or shear strain occurring per unit time, in/s. When performing the strain DMA test, if the strain amplitude is kept constant, the strain rate increases with increasing loading frequency.
Thus, as can be seen from FIG. 6, at lower frequencies, i.e., at lower strain rates, the thermoplastic polyurethane is in a highly elastic state and therefore has a lower storage modulus; when the frequency is increased, namely the strain rate is increased, the internal molecular chain segments of the thermoplastic polyurethane cannot respond in time to relax, so that most of the molecular chain segments cannot move, and the macro molecular chain segments show glass transition, namely the high elastic state is converted into the glass state, so that the storage modulus of the thermoplastic polyurethane is increased, namely the modulus of the thermoplastic polyurethane is increased.
The strain rate sensitive layer 6 exhibits a high elastic state at a low strain rate, and the strain rate sensitive layer 6 is easy to deform at the moment, so that strain energy is absorbed through deformation, for example, when the flexible display module is folded, the strain rate is low, and the strain rate sensitive layer 6 has good flexibility and is easy to fold; and the strain of the second adhesive layer 52 can be effectively reduced by absorbing the strain energy through the strain rate sensitive layer 6, thereby reducing the risk of Peeling (Peeling) of the second adhesive layer 52. The strain rate sensitive layer 6 presents a glass state at a high strain rate, and the strain rate sensitive layer 6 is not easy to deform at the moment, so that when the strain rate sensitive layer 6 is subjected to external impact load, the strain rate sensitive layer 6 presents smaller strain and has better impact resistance, and the impact resistance of the whole flexible display module is improved; and can effectively protect the film layer below the strain rate sensitive layer 6, for example, can effectively protect an OLED display panel.
Referring to the change curve diagram of the modulus of the polyurethane at different strain rates shown in FIG. 7, the strain rate (engineering strain) of the polyurethane from 1s can be obtained-1Variation is 100s-1The modulus (engineering stress) is increased from 15Mpa to 45Mpa, consistent with the trend of the DMA curve shown in fig. 4, i.e. the modulus of the strain rate sensitive layer 6 increases with increasing strain rate.
With reference to fig. 5, a second adhesive layer 52 is disposed on a side of the strain rate sensitive layer 6 away from the back support film 1, and the second adhesive layer 52 may be OCA optical adhesive.
The side, far away from the back support film 1, of the second bonding layer is provided with the ultrathin glass layer 8, the side, far away from the back support film 1, of the ultrathin glass layer 8 is coated with the buffer coating 9, the buffer coating 9 is coated on the ultrathin glass, so that no bonding layer is arranged between the buffer coating 9 and the ultrathin glass, namely the buffer coating 9 is coated on the side, far away from the back support film 1, of the ultrathin glass layer 8 through a coating process, bonding by using the bonding layer is avoided, and the risk that the buffer coating 9 is buckled, folded and peeled to fail is reduced; and the buffer coating 9 plays a role of a buffer layer on the surface layer of the ultrathin glass layer 8, so that the risk that the ultrathin glass layer 8 fails due to impact extrusion load is reduced. In addition, the ultra-thin glass layer 8 is arranged on the side, far away from the flexible display panel 3, of the protective film layer 7, and the ultra-thin glass layer 8 is not easy to buckle and wrinkle due to the large modulus of the ultra-thin glass layer 8, and the protective film layer 7 positioned below the ultra-thin glass layer is not easy to buckle and wrinkle due to the extrusion effect of the ultra-thin glass layer 8.
The material of the buffer coating 9 may include one or more of Polyimide (PI), polyethylene terephthalate (PET), Thermoplastic Polyurethane (TPU), and polymethyl methacrylate (PMMA), that is, the material of the buffer coating 9 may be one of Polyimide (PI), polyethylene terephthalate (PET), Thermoplastic Polyurethane (TPU), and polymethyl methacrylate (PMMA); or a mixture of Polyimide (PI), polyethylene terephthalate (PET), Thermoplastic Polyurethane (TPU), and polymethyl methacrylate (PMMA); it may also be a plurality of layers of simple materials, for example, the buffer coating 9 may include a PET layer and a TPU layer, and other combinations, which are not described herein.
Referring to the schematic structural diagram of the second exemplary embodiment of the flexible display module shown in fig. 8, the main difference between this exemplary embodiment and the first exemplary embodiment is that: the strain rate sensitive layer 6 may be provided between the first adhesive layer 51 and the protective film layer 7 without providing the strain rate sensitive layer 6 between the protective film layer 7 and the second adhesive layer; the strain rate sensitive layer 6 is coated on the side, far away from the ultrathin glass layer 8, of the protective film layer 7, so that the bonding of an adhesive layer is avoided, and the risk of failure caused by buckling, wrinkling and peeling of the strain rate sensitive layer 6 is reduced; the strain rate sensitive layer 6 is bonded with the polarizer 4 through a third bonding layer 53, the protective film layer 7 is bonded with the ultrathin glass layer 8 through a fourth bonding layer 54, and the third bonding layer 53 and the fourth bonding layer 54 can be OCA optical cement. Similarly, the flexible display module has good impact resistance and can protect the flexible display panel 3 on the basis of ensuring that the flexible display panel 3 has enough flexibility and can be folded through the strain rate sensitive layer 6; furthermore, strain energy can be absorbed by the strain rate sensitive layer 6, thereby reducing the risk of the third adhesive layer 53 peeling off when bending.
Referring to a schematic structural diagram of a third exemplary embodiment of the flexible display module shown in fig. 9, the main difference between the exemplary embodiment and the first exemplary embodiment is that: the strain rate sensitive layer 6 may be provided as two layers, a first strain rate sensitive layer 61 and a second strain rate sensitive layer 62. Two strain rate sensitive layers 6 are coated on two opposite sides of the protective film layer 7, for example, a first strain rate sensitive layer 61 is arranged between the protective film layer 7 and the first adhesive layer 51, a second strain rate sensitive layer 62 is arranged between the protective film layer 7 and the second adhesive layer, namely, the first strain rate sensitive layer 61 is coated on one side of the protective film layer 7 close to the ultrathin glass layer 8, and the second strain rate sensitive layer 62 is coated on one side of the protective film layer 7 far away from the ultrathin glass layer 8, so that the adhesive layer adhesion is avoided, and the risk that the first strain rate sensitive layer 61 and the second strain rate sensitive layer 62 buckle, wrinkle and peel to fail is reduced; the first strain rate sensitive layer 61 and the ultra-thin glass layer 8 are bonded through a first bonding layer 51, the second strain rate sensitive layer 62 and the polarizer 4 are bonded through a second bonding layer 52, and both the first bonding layer 51 and the second bonding layer 52 can be OCA optical adhesive. Similarly, the flexible display module can further have good impact resistance and can protect the flexible display panel 3 on the basis of ensuring that the flexible display panel 3 has enough flexibility and can be folded through the two strain rate sensitive layers 6; the first strain rate sensitive layer 61 can absorb strain energy to reduce the risk of the first adhesive layer 51 peeling off during bending, and the second strain rate sensitive layer 62 can absorb strain energy to reduce the risk of the second adhesive layer 52peeling off during bending.
Referring to table one, the flexible display module shown in fig. 9 and the folding simulation comparison table of the flexible display module shown in fig. 1, wherein the strain rate during folding is 1s-1，
| Class of flexible display module | FIG. 1 is a flexible display module | FIG. 9 is a flexible display module |
| - | Maximum strain (unit:%) | Maximum strain (unit:%) |
| First |
136 | 125.4 |
| Second |
143.4 | 131 |
From table one, we can see: the flexible display module can effectively reduce the maximum strain of the first adhesive layer 51 and the second adhesive layer 52, so that the risk of Peeling of the first adhesive layer 51 and the second adhesive layer 52 is reduced.
Referring to a comparison graph of the falling ball impact simulation of the flexible display module shown in fig. 9 and the flexible display module shown in fig. 1 shown in fig. 10, it can be obtained from the following graphs: the safe falling ball height of the flexible display module shown in fig. 1 is about 6cm, and the safe falling ball height of the flexible display module shown in fig. 9 is about 15cm, which is improved by 9cm, so that the impact resistance of the flexible display module is improved.
In addition, in other example embodiments of the present disclosure, the protective film layer 7 may not be provided. Referring to fig. 11, a first strain rate sensitive layer 61 is coated on the side of the polarizer 4 far from the back support film 1, that is, the first strain rate sensitive layer 61 is coated on the side of the polarizer 4 far from the back support film 1 through a coating process, so that the bonding with an adhesive layer is avoided, and the risk of peeling off the adhesive layer is avoided. The side of the ultra-thin glass layer 8 far away from the buffer coating 9 is coated with the second strain rate sensitive layer 62, that is, the second strain rate sensitive layer 62 is coated on the side of the ultra-thin glass layer 8 far away from the buffer coating 9 through a coating process, so that the bonding with an adhesive layer is avoided, and the risk of peeling off of the adhesive layer is avoided.
An adhesive layer 5 is arranged between the first strain rate sensitive layer 61 and the second strain rate sensitive layer 62, namely, the first strain rate sensitive layer 61 and the second strain rate sensitive layer 62 are adhered through the adhesive layer 5, and the adhesive layer 5 can be OCA optical cement.
Similarly, the flexible display module can further have good impact resistance and can protect the flexible display panel 3 on the basis of ensuring that the flexible display panel 3 has enough flexibility and can be folded through the two strain rate sensitive layers 6; furthermore, strain energy can be absorbed by the first strain rate sensitive layer 61 and the second strain rate sensitive layer 62, thereby reducing the risk of peeling of the adhesive layer 5 when it is bent.
It should be noted that more layers may be disposed on the strain rate sensitive layer 6, and the positions of the layers may also be set as needed, which is not described in detail herein.
Based on the same inventive concept, the disclosed example embodiments provide a display device, which may include any one of the flexible display modules described above. The specific structure of the flexible display module has been described in detail above, and therefore, the detailed description thereof is omitted here.
The specific type of the display device is not particularly limited, and any display device may be used in the art, specifically, for example, a mobile device such as a mobile phone, a wearable device such as a watch, a VR device, etc., and a person skilled in the art may select the display device according to the specific use of the display device, which is not described herein again.
It should be noted that the display device includes other necessary components and compositions, such as a housing, a circuit board, a power line, and the like, besides the flexible display module, and those skilled in the art can supplement the display device accordingly according to the specific use requirement of the display device, and the description thereof is omitted.
Compared with the prior art, the display device provided by the exemplary embodiment of the invention has the same beneficial effects as the flexible display module provided by the exemplary embodiment, and the description is omitted here.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. The utility model provides a flexible display module assembly which characterized in that includes:
a flexible display panel;
and the strain rate sensitive layer is arranged on one side of the flexible display panel, and the modulus of the strain rate sensitive layer is increased along with the increase of the strain rate.
2. The flexible display module of claim 1, wherein the material of the strain rate sensitive layer comprises one or more of polyvinyl butyral, ethylene-vinyl acetate copolymer, and polyurethane.
3. The flexible display module of claim 1, further comprising:
the ultrathin glass layer is arranged on one side of the strain rate sensitive layer far away from the flexible display panel;
and the buffer coating is coated on one side of the ultrathin glass layer far away from the flexible display panel.
4. The flexible display module according to claim 3, wherein the material of the buffer coating comprises one or more of polyimide, polyethylene terephthalate, thermoplastic polyurethane, and polymethyl methacrylate.
5. The flexible display module of claim 3, further comprising:
and the protective film layer is arranged on one side of the ultrathin glass layer close to the flexible display panel.
6. The flexible display module of claim 5, wherein the strain rate sensitive layer is coated on a side of the protective film layer close to the ultra-thin glass layer, a first adhesive layer is arranged between the strain rate sensitive layer and the ultra-thin glass layer, and a second adhesive layer is arranged between the protective film layer and the flexible display panel; or the strain rate sensitive layer is coated on one side, far away from the ultrathin glass layer, of the protective film layer, a third bonding layer is arranged between the strain rate sensitive layer and the flexible display panel, and a fourth bonding layer is arranged between the protective film layer and the ultrathin glass layer.
7. The flexible display module of claim 5, wherein the strain rate sensitive layer comprises a first strain rate sensitive layer and a second strain rate sensitive layer, the first strain rate sensitive layer is coated on one side of the protective film layer close to the ultrathin glass layer, the second strain rate sensitive layer is coated on one side of the protective film layer far away from the ultrathin glass layer, a first bonding layer is arranged between the first strain rate sensitive layer and the ultrathin glass layer, and a second bonding layer is arranged between the second strain rate sensitive layer and the flexible display panel.
8. The flexible display module of claim 3, wherein the strain rate sensitive layer comprises a first strain rate sensitive layer and a second strain rate sensitive layer, the first strain rate sensitive layer is coated on one side of the ultrathin glass layer close to the flexible display panel, the second strain rate sensitive layer is coated on one side of the flexible display panel close to the ultrathin glass layer, and an adhesive layer is arranged between the first strain rate sensitive layer and the second strain rate sensitive layer.
9. The flexible display module of claim 1, further comprising:
the polaroid is arranged on one side, close to the strain rate sensitive layer, of the flexible display panel;
the back film is arranged on one side of the flexible display panel far away from the strain rate sensitive layer;
the back support film is arranged on one side of the back film, which is far away from the flexible display panel.
10. A display device, comprising: the flexible display module according to any one of claims 1 to 9.
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| CN202111255444.6A CN114220342B (en) | 2021-10-27 | 2021-10-27 | Flexible display module and display device |
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| CN202111255444.6A CN114220342B (en) | 2021-10-27 | 2021-10-27 | Flexible display module and display device |
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| CN114220342B (en) | 2023-11-17 |
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