CN111477670A - Display device - Google Patents
Display device Download PDFInfo
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- CN111477670A CN111477670A CN202010398161.6A CN202010398161A CN111477670A CN 111477670 A CN111477670 A CN 111477670A CN 202010398161 A CN202010398161 A CN 202010398161A CN 111477670 A CN111477670 A CN 111477670A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
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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
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Abstract
The present invention provides a display device, including: the display panel comprises a flat plate part, a bent part and a fixed part, wherein the bent part is positioned between the flat plate part and the fixed part, and the fixed part is bent to the back of the flat plate part through the bent part; the supporting structure is arranged on the back of the flat plate part and comprises a first adhesive material layer in contact with the flat plate part, a second adhesive material layer in contact with the fixing part and a supporting part positioned between the first adhesive material layer and the second adhesive material layer; in a direction perpendicular to the flat plate portion, the support portion includes a support layer and a buffer layer cured on a side of the support layer facing the first glue material layer. The display device is used for realizing the light and thin design and the narrow frame design of the display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device.
Background
Organic light Emitting diode Display devices (Organic L light Emitting Display, O L ED) are becoming the first choice of screens, have many advantages of self-luminescence, high luminous efficiency, short response time, high definition and contrast, and the like, and can ensure that the screens have certain flexibility and adaptability.
At present, a flexible display screen film layer generally comprises a cover plate, a module functional film layer, a light-emitting film layer, a back plate film layer, a flexible substrate, a back support film and other film layer structures. In the prior art, a substrate portion connecting a flexible Circuit Board (FPC) and a driver chip (IC) may be directly bent to a back surface of a display panel, so as to implement a narrow bezel design of a flexible display device. In addition, the back support film mainly plays a role in film layer support protection and corresponding mechanical property realization under the display panel, and plays a vital role in the process of preparing the flexible display screen.
Fig. 1 is a schematic structural diagram of a conventional flexible display device in which a backing film and a support structure are stacked together, wherein the backing film 01 includes a first substrate 2 and a first adhesive material 1 coated on the first substrate 2, the first substrate 2 is usually a polymer material, the support structure 02 includes a support 4 and a second adhesive material 3 coated on the support 4, in order to facilitate transportation and storage of related structures, release films are respectively disposed on two opposite sides of the backing film 01, and release films are respectively disposed on two opposite sides of the support structure 02, during a process of manufacturing the flexible display device, when the first substrate 2 of the backing film 01 and the second adhesive material 3 of the support structure 02 are bonded together, the release films at the bonded portions are often required to be peeled off and then bonded together, so as to form the stacked structure of the backing film 01 and the support structure 02 shown in fig. 1, wherein a mark "5" in fig. 1 is the first release film bonded on a side of the first adhesive material 1 away from the first substrate 2, the label "6" is the second release film attached to the side of the support member 4 away from the second adhesive material 3. When the flexible display device is prepared subsequently, the first release film 5 and the second release film 6 can be directly peeled off, and then the related modules are attached and prepared. Wherein, the thickness of the first substrate 2 is generally 20 μm to 100 μm, the thickness of the first glue material 1 and the second glue material 3 is generally 10 μm to 50 μm, and when the support 4 is made of metal, the thickness of the support 4 is generally 15 μm to 50 μm, and the whole stacked structure is thicker. Like this, after laminating it at the panel back to buckle and form flexible display device, this flexible display device whole thickness is thicker, and whole frame broad.
Therefore, the existing display device cannot be designed to be light and thin and have a narrow frame.
Disclosure of Invention
The invention provides a display device, which is used for realizing the light and thin design and narrow frame design of the display device.
An embodiment of the present invention provides a display device, including:
the display panel comprises a flat plate part, a bent part and a fixed part, wherein the bent part is positioned between the flat plate part and the fixed part, and the fixed part is bent to the back of the flat plate part through the bent part;
the supporting structure is arranged on the back of the flat plate part and comprises a first adhesive material layer in contact with the flat plate part, a second adhesive material layer in contact with the fixing part and a supporting part positioned between the first adhesive material layer and the second adhesive material layer;
in a direction perpendicular to the flat plate portion, the support portion includes a support layer and a buffer layer cured on a side of the support layer facing the first glue material layer.
In a possible implementation manner, a base layer in contact with the second adhesive material layer and a third adhesive material layer in contact with the fixing portion are arranged between the second adhesive material layer and the fixing portion.
In one possible implementation, the flat plate portion includes a bendable region and a non-bendable region other than the bendable region;
the thickness of the buffer layer in the non-bending area is a first thickness, and the thickness of the buffer layer in the bendable area is a second thickness smaller than the first thickness along a direction perpendicular to a bending axis of the flat plate portion.
In a possible implementation manner, along a direction parallel to the bending axis, the thickness of the buffer layer in the non-bending region is the first thickness, and the thickness of the buffer layer in the bendable region is a third thickness smaller than the first thickness.
In a possible implementation manner, the bendable region includes a central region and a first edge region and a second edge region symmetrically disposed with respect to the central region, and along a direction parallel to the bending axis, a thickness of the buffer layer in the non-bendable region is the first thickness, a thickness of the buffer layer in the central region is the second thickness, and a thickness of the buffer layer in the first edge region and the second edge region is the third thickness smaller than the second thickness.
In a possible implementation manner, the third thickness decreases according to the distance between the position corresponding to the bending shaft and the edge of the flat plate portion.
In one possible implementation, the material of the buffer layer is at least one of thermoplastic polyimide, thermoplastic polyurethane elastomer rubber, polyimide and polyethylene terephthalate.
In a possible implementation manner, the supporting part is formed by hot-pressing the thermoplastic polyimide or the thermoplastic polyurethane elastomer rubber at the temperature of 300-350 ℃ and the pressure of 0.8-1.0N for 10-15 s and molding on the supporting layer.
In one possible implementation, the support part is formed by coating the polyimide or the polyethylene terephthalate on the support layer and curing at a high temperature.
In one possible implementation, the modulus of the support layer is 100 to 400Gpa, the modulus of the thermoplastic polyimide is 1 to 8Gpa, and the modulus of the thermoplastic polyurethane elastomer rubber is 1 to 500 Mpa.
In one possible implementation, the thickness of the support layer ranges from 15 μm to 50 μm.
In one possible implementation, the buffer layer has a thickness of 10 μm to 50 μm.
The invention has the following beneficial effects:
the embodiment of the invention provides a display device which comprises a display panel, wherein the display panel comprises a flat plate part, a fixing part and a bent part positioned between the flat plate part and the fixing part, the fixing part is bent to the back of the flat plate part through the bent part, the display device also comprises a supporting structure arranged on the back of the flat plate part, the supporting structure comprises a first glue material layer contacted with the flat plate part, a second glue material layer contacted with the fixing part and a supporting part positioned between the first glue material layer and the second glue material layer, and the supporting part comprises a supporting layer and a buffer layer solidified on one side of the supporting layer facing to the first glue material layer along the direction vertical to the flat plate part. Like this, the supporting layer can regard as the basement with the whole buffer layer of solidification above that to can form and have concurrently and protect the bearing structure of display panel at this holistic relative surface first glue layer of coating respectively and second glue layer, because whole bearing structure need not supporting part and other basement laminating, whole thickness can be made thin, correspondingly, can reduce to the radius of buckling of kink, and then realized display device's frivolous design and narrow frame design.
Drawings
FIG. 1 is a schematic diagram of a flexible display device in which a back film and a supporting structure are stacked;
FIG. 2 is a schematic view of a stacked structure shown in FIG. 1 attached to a back surface of a panel;
FIG. 3 is a schematic view of one of the structures of the display panel shown in FIG. 2 after being bent;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 5 is a schematic view of one of the stack structures forming the support structure of FIG. 4;
FIG. 6 is a schematic diagram illustrating a structure of a display panel before being bent according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the invention;
FIG. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 9 is a schematic view of a structure of a display panel before being bent according to an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention;
FIG. 11 is a schematic diagram illustrating a region division of a flat plate portion according to an embodiment of the present invention;
FIG. 12 is a schematic diagram illustrating a region division of a flat plate portion according to an embodiment of the present invention;
FIG. 13 is a cross-sectional view of the support portion taken along the direction MM' in FIG. 12;
FIG. 14 is a cross-sectional view of the support portion taken along the direction NN' of FIG. 11;
FIG. 15 is a cross-sectional view of the support portion taken along the direction MM' in FIG. 12;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Description of reference numerals: 01-a back film; 1-a first rubber material; 2-a first substrate; 02-a support structure; 3-a second glue material; 4-a support; 5-a first release film; 6-a second release film; 7-a panel; 8-a third rubber material; 81-fourth glue material; 9-a second substrate; 10-a display panel; 101-a flat plate portion; 102-a bending part; 103-a fixation section; 20-a support structure; 201-a first glue layer; 202-a second glue layer; 203-a support; 2031-a support layer; 2032-a buffer layer; 30-a third release film; 40-a fourth release film; 204-a base layer; 205-a third glue layer; 50-protective glue layer; a-a bendable region; b-a non-bending region; c-a central region; d1 — first edge zone; d2 — second edge region; 60-a functional module layer; 70-an optical adhesive layer; 80-cover plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the word "comprise" or "comprises", and the like, in the context of this application, is intended to mean that the elements or items listed before that word, in addition to those listed after that word, do not exclude other elements or items.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the prior art, the stacked structure shown in fig. 1 is attached to the back of the panel 7 to form a structure shown in fig. 2, in order to ensure the supporting performance of the stacked structure on the panel 7, a layer of third adhesive material 8 is coated on one side of the supporting member 4 away from the panel 7, the third adhesive material 8 may be a three-layer structure in which two opposite sides of a substrate layer are respectively provided with an adhesive layer, and then a portion of the panel 7 for binding a driving chip, a fourth adhesive material 81 attached to the back of the portion, and a second substrate 9 are bent to be attached to the third adhesive material 8 on the back of an operable Area (Active Area, AA) of the panel 7, so as to form a schematic structural diagram shown in fig. 3. Because in the display device's after buckling bearing structure, except that support piece 4 there are two-layer basement to and the material is glued to the multilayer, whole thickness is thicker, like this, the radius of buckling of the part that can buckle of panel 7 is also great, and then leads to the frame great.
In view of this, an embodiment of the present invention provides a display device, which is used for implementing a light and thin design and a narrow frame design of the display device.
Fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device includes:
the display panel 10, the display panel 10 includes a flat plate portion 101, a bent portion 102 and a fixing portion 103, wherein the bent portion 102 is located between the flat plate portion 101 and the fixing portion 103, and the fixing portion 103 is bent to the back of the flat plate portion 101 through the bent portion 102;
in an embodiment of the present invention, at least a portion of the tablet portion 101 is used for display, and the fixing portion 103 can be used for IC binding.
The supporting structure 20 is arranged on the back of the flat plate part 101, and the supporting structure 20 comprises a first glue material layer 201 in contact with the flat plate part 101, a second glue material layer 202 in contact with the fixing part 103, and a supporting part 203 positioned between the first glue material layer 201 and the second glue material layer 202;
in the embodiment of the present invention, the first adhesive layer 201 may be a Pressure Sensitive Adhesive (PSA), and may also be an optical adhesive (OCA), the second adhesive layer 202 may be a double-sided adhesive, and may be a three-layer structure in which two opposite sides of the substrate layer are respectively provided with an adhesive layer, and of course, a person skilled in the art may also select the materials of the first adhesive layer 201 and the second adhesive layer 202 according to the actual application requirement, which is not limited herein.
In a direction perpendicular to the flat plate portion 101, the supporting portion 203 includes a supporting layer 2031 and a cushioning layer 2032 cured on a side of the supporting layer 2031 facing the first glue layer 201.
In the embodiment of the present invention, the supporting portion 203 includes a supporting layer 2031 and a cushioning layer 2032 cured on the supporting layer 2031 facing the first glue layer 201. In this way, the support layer 2031 and the cured buffer layer 2032 form an integrated support portion 203, so that the first adhesive layer 201 and the second adhesive layer 202 can be coated on the opposite surfaces of the support portion 203 respectively to form the support structure 20 capable of protecting the display panel 10.
In addition, in the embodiment of the present invention, since the rigidity of the supporting layer 2031 may cause a large stress to the display panel 10, by curing the buffer layer 2032 on the side of the supporting layer 2031 facing the first adhesive layer 201, the stress of the supporting layer 2031 on the display panel 10 can be weakened by the buffer layer 2032, and the service life of the display device can be further prolonged.
In the embodiment of the present invention, the inventors found, in the bending performance test of the support layer 2031 made of various materials, that as shown in table 1, when the support layer 2031 is made of Polyethylene Terephthalate (PET), Polyimide (PI), or stainless steel sheet, respectively, and the static bending is performed at a temperature of 60 ℃ and a humidity of 90% RH for 120h for each support layer 2031, the unrecovered angle of the support layer 2031 made of PET is 120 ° to 140 °, the unrecovered angle of the support layer 2031 made of PI is 60 ° to 100 °, and the unrecovered angle of the stainless steel 2031 made of PI is 10 ° or less, compared to the structure having a better rebound resilience and a smaller crease when a metal material is selected as the support layer 2031. In this way, in the embodiment of the present invention, the supporting layer 2031 may be made of a metal material, so that the supporting layer 2031 has better resilience and smaller crease, and the finally manufactured display device has better usability and better user experience. In practical applications, those skilled in the art can select the corresponding material of the support layer 2031 according to practical needs, and is not limited herein.
| Material | Static bending (60 ℃/90% RH) | Angle of non-return | |
| PET | 120h | 120°～140° | |
| | 120h | 60°～100° | |
| Stainless steel sheet | 120h | Less than 10 DEG |
TABLE 1
In the embodiment of the present invention, when the supporting structure 20 of the display device is manufactured, a substrate made of a polymer material may be removed, for example, the first substrate 2 in fig. 1 is removed, and a metal material is used to manufacture the supporting layer 2031 of the supporting structure 20, because the metal material has better resilience and smaller folding marks compared to the polymer material, the usability of the display device is improved. In addition, the buffer layer 2032 cured on the support layer 2031 effectively weakens the rigid stress of the support layer 2031 on the display panel 10, thereby effectively protecting the display panel 10 and prolonging the service life of the display device.
In the embodiment of the present invention, when the supporting layer 2031 is made of a metal material, the thickness of the supporting layer 2031 may be 15 μm to 50 μm, and in practical applications, the thickness of the supporting layer 2031 may be set to 40 μm, so that the supporting layer 2031 can effectively ensure effective support of the relevant film layers of the display panel 10, and meanwhile, the supporting layer 2031 is prevented from generating a large rigid stress on the display panel 10 due to an excessively thick supporting layer 2031. In addition, the thickness of the buffer layer 2032 is in a range from 10 μm to 50 μm, and in practical applications, the thickness of the buffer layer 2032 may be set to 25 μm, so that the buffer layer 2032 can weaken the rigid stress of the support layer 2031 on the display panel 10, and at the same time, the buffer layer 2032 is not too thick to cause the film to fall off, and too thin stress buffering is not obvious, thereby ensuring the usability of the display device. In practical applications, the display device provided by the embodiment of the invention can be thinned by 50 μm to 60 μm compared with the prior art, thereby realizing the light and thin design and narrow frame design of the display device.
In an embodiment of the present invention, as shown in fig. 5, one of the stacking structures for forming the support structure 20 of fig. 4 is schematically shown, specifically, the stack structure includes a support portion 203, the support portion 203 includes a support layer 2031 and a buffer layer 2032 cured on a surface of the support layer 2031, the stack structure further includes a first glue layer 201 coated on the buffer layer 2032, and further, in order to facilitate transportation and storage, a third release film 30 is attached to the side of the first adhesive material layer 201 away from the supporting layer 2031, a fourth release film 40 is attached to the side of the supporting layer 2031 away from the first adhesive material layer 201, in the using process, the third release film 30 and the fourth release film 40 in fig. 5 can be directly peeled off, and then, they are attached to the back surface of the flat plate portion 101 in fig. 4, and then, the support structure 20 is formed by applying a second glue layer 202 on the side of the support layer 2031 facing away from the first glue layer 201.
In the embodiment of the present invention, as shown in fig. 6, a schematic structural diagram of one of the display panels 10 before being bent is shown, specifically, after a binding process of a related module of a display device is performed by using the stacked structure shown in fig. 1, since the back film 01 can be used as a process film, in a specific implementation process, the whole layer of the back film 01 located on the back side of the display panel 10 can be torn off, then the release film of the stacked structure shown in fig. 5 is peeled off, and then the stacked structure is attached to the back side of the flat plate portion 101, and a second adhesive layer 202 is coated on a side of the supporting layer 2031 away from the first adhesive layer 201 to form the supporting structure 20, and then the fixing portion 103 is bent to the back side of the flat plate portion 101, so as to form the display device shown in fig.. Because the whole process is directly based on the process of the back film 01, the needed support structure 20 can be attached to the display panel 10, the whole manufacturing process is simplified, and the manufacturing efficiency of the display device is improved. In addition, compared to fig. 2, when the supporting layer 2031 with the same thickness is adopted, since two layers of substrates and two layers of adhesives are omitted on the back surface of the flat plate portion 101, the overall thickness of the display device is relatively thin, and thus the light and thin design of the display device is realized.
In the embodiment of the present invention, as shown in fig. 7, one of the structural diagrams of the display device is shown, specifically, a base layer 204 in contact with the second adhesive layer 202 and a third adhesive layer 205 in contact with the fixing portion 103 are disposed between the second adhesive layer 202 and the fixing portion 103. In a specific implementation, the material of the substrate layer 204 may be PET, or may be a polymer material such as PI. The third layer of adhesive 205 may be a PSA adhesive or may be an OCA adhesive. By additionally arranging the base layer 204 and the third adhesive layer 205, the stability of the related superposed film layers of the display device is improved, and the use performance of the display device is further improved.
In the display device shown in fig. 7, compared with fig. 2, the supporting structure 20 on the back of the flat plate portion 101 has one less substrate, so that the display device is thinned to a certain extent, and the bending radius of the display panel 10 can be further reduced, thereby implementing a light and thin design and a narrow frame design of the display device.
In the embodiment of the present invention, as shown in fig. 8, specifically, the display device further includes a protective adhesive layer 50 covering the bending portion 102, and the protective adhesive layer 50 may be an MC L adhesive layer, so that the bending portion 102 is not broken when being bent, and the circuit traces can be effectively prevented from being damaged by a subsequent process, thereby prolonging the service life of the display device.
In the embodiment of the present invention, as shown in fig. 9, a schematic structural diagram of the display panel 10 before being bent is shown, specifically, after the stacking structure shown in fig. 1 is adopted to perform a binding process of a related module of a display device, only the whole back film layer on the back surface of the flat plate portion 101 is torn off, the back film on the back surface of the fixing portion 103 is reserved, and the back film includes the base layer 204 and the third adhesive layer 205, then the release film is peeled off from the stacking structure shown in fig. 5 and attached to the back surface of the flat plate portion 101, and then the fixing portion 103 is bent to the back surface of the flat plate portion 101, so as to form the display device shown in fig. 7.
In the embodiment of the present invention, since the supporting portion 203 includes the supporting layer 2031 and the buffer layer 2032 cured on the side of the supporting layer 2031 facing the first adhesive layer 201, the stacked structure on the back surface of the display panel 10 can be replaced by peeling and bonding, thereby realizing diversified designs of the display device. And the whole process can be realized by directly peeling and bonding, the process cost is lower, and the manufacturing efficiency is higher.
In an embodiment of the present invention, referring to fig. 10 and fig. 11, fig. 10 is a schematic structural diagram of a display device, and fig. 11 is a schematic sectional diagram of a flat plate portion 101. Specifically, the flat plate portion 101 includes a bendable region a and a non-bendable region B other than the bendable region a;
in a direction perpendicular to the bending axis of the flat plate portion 101, the thickness of the buffer layer 2032 in the non-bending region B is a first thickness d1, and the thickness of the buffer layer 2032 in the bendable region a is a second thickness d2 smaller than the first thickness d 1.
In a specific implementation, a direction perpendicular to the bending axis of the flat plate portion 101 may be a direction indicated by an arrow X in fig. 11, and a direction parallel to the bending axis of the flat plate portion 101 may be a direction indicated by an arrow Y in fig. 11. Because the second thickness d2 of the buffer layer 2032 in the bendable region a is less than the first thickness d1 of the buffer layer 2032 in the non-bendable region B along the direction perpendicular to the bending axis of the flat plate portion 101, the thickness of the first adhesive layer 201 coated on the buffer layer 2032 in the bendable region a is greater than that in the non-bendable region B, thereby effectively avoiding the occurrence of cracks in the bendable region.
In the embodiment of the invention, the thickness of the buffer layer 2032 in the non-bending region B is the first thickness d1, and the thickness of the buffer layer 2032 in the bendable region a is the third thickness d3 smaller than the first thickness d1 along the direction parallel to the bending axis. In particular implementations, the third thickness d3 may be equal in value to the second thickness d 2. The thickness of the buffer layer 2032 in the non-bending region B is the first thickness d1, i.e. the thickness of the buffer layer 2032 in the non-bending region is the same, and the thickness of the buffer layer 2032 in the bending region a is the third thickness d3, i.e. the thickness of the buffer layer 2032 in the non-bending region is the same. In the specific implementation process, the buffer layer 2032 can be patterned directly by hot-pressing film-pressing or fusion-casting, and the whole process is simple.
In the embodiment of the present invention, as shown in fig. 12, a schematic region division of the flat plate portion 101 is shown, specifically, the bendable region a includes a central region C and a first edge region D1 and a second edge region D2 symmetrically disposed with respect to the central region C, along a direction parallel to the bending axis, a thickness of the buffer layer 2032 in the non-bending region B is a first thickness D1, a thickness of the buffer layer 2032 in the central region C is a second thickness D2, and a thickness of the buffer layer 2032 in the first edge region D1 and the second edge region D2 is a third thickness D3 smaller than the second thickness D2. Fig. 13 is a schematic cross-sectional view of the supporting portion 203 along the MM' direction in fig. 12. In practical applications, the first edge region D1 and the second edge region D2 are closer to the edge of the flat plate portion 101 perpendicular to the bending axis than the central region C, and the first edge region D1 and the second edge region D2 are more prone to crack than the central region C, and the third thickness D3 of the buffer layer 2032 in the first edge region D1 and the second edge region D2 is smaller than the second thickness D2 in the central region C, so that the generation of cracks in the first edge region D1 and the second edge region D2 can be effectively avoided. And the second thickness d2 of the buffer layer 2032 in the central region C is smaller than the first thickness d1 of the buffer layer in the bendable region a, so as to avoid the generation of cracks in the central region C, thereby improving the use performance of the display device.
In the embodiment of the present invention, the third thickness d3 decreases according to the distance from the edge of the flat plate portion 101 at the position corresponding to the bending axis. Fig. 14 is a schematic cross-sectional view of the supporting portion 203 along the direction NN' in fig. 11. Fig. 15 is a schematic cross-sectional view of the supporting portion 203 along the MM' direction in fig. 12. In a specific implementation process, since the edge of the flat plate portion 101 is more prone to crack, along a direction parallel to the bending axis, the closer the third thickness d3 is to the edge of the flat plate portion 101, and accordingly, the thinner the thickness of the buffer layer 2032 is, in this case, the thicker the thickness of the first adhesive layer 201 closer to the edge of the flat plate portion 101 is, so that the generation of cracks at the edge of the flat plate portion 101 is effectively avoided, and the service life of the display device is prolonged.
In practical applications, a person skilled in the art may divide the region of the flat plate portion 101 according to actual needs, which is not limited herein, and may set the shape of the region of the bendable region a according to actual needs, for example, the region may be rectangular, circular, or triangular, which is not limited herein.
In the embodiment of the present invention, the material of the buffer layer 2032 is at least one of thermoplastic polyimide, thermoplastic polyurethane elastomer rubber, polyimide, and polyethylene terephthalate. In a specific implementation process, the buffer layer 2032 can weaken the rigid stress of the support layer 2031 on the display panel 10, thereby improving the service life of the display device.
In the embodiment of the present invention, the buffer layer 2032 may be cured on the support layer 2031 in the following two ways, but is not limited to the following two ways.
First mode
The first way is specifically that the supporting part 203 is formed by hot-pressing thermoplastic polyimide or thermoplastic polyurethane elastomer rubber at the temperature of 300-350 ℃ and the pressure of 0.8-1.0N for 10-15 s on the supporting layer 2031. In this case, the support layer 2031 and the cushion layer 2032 made of thermoplastic polyimide or thermoplastic polyurethane elastomer rubber can form the integrated support portion 203 with a peel strength of about 17N/Inch, thereby simplifying the manufacturing process.
In addition, the buffer layer 2032 made of thermoplastic polyimide or thermoplastic polyurethane elastomer rubber weakens the reflection capability of the support layer 2031 against external ambient light or internal light to some extent, thereby improving the display effect of the display device.
Second mode
The second way is specifically that the supporting portion 203 is formed by coating polyimide or polyethylene terephthalate on the supporting layer 2031 and curing at a high temperature. In a specific implementation process, the buffer layer 2032 formed of polyimide or polyethylene terephthalate is cured on the support layer 2031 by high temperature curing, so that the integrated support portion 203 is formed, thereby simplifying the manufacturing process.
In the embodiment of the present invention, the modulus of the support layer 2031 is 100 to 400Gpa, the modulus of the thermoplastic polyimide is 1 to 8Gpa, and the modulus of the thermoplastic polyurethane elastomer rubber is 1 to 500 Mpa. In practical applications, the buffer layer 2032 may be prepared by selecting thermoplastic polyimide with a modulus of 2Gpa, so that the prepared buffer layer 2032 is softer than the support layer 2031 made of a metal material, and the rigid stress of the support layer 2031 on the display panel 10 can be effectively weakened, thereby prolonging the service life of the display device.
In the embodiment of the present invention, as shown in fig. 16, one of the structural diagrams of the display device is further shown, specifically, along the light emitting direction of the flat plate portion 101, the display device further includes a functional module layer 60, such as a touch panel, a polarizer, etc., disposed on the flat plate portion 101, an optical adhesive layer 70 disposed on the functional module layer 60, and a cover plate 80 disposed on the optical adhesive layer 70. The flat plate portion 101 includes a back plate structure, a light emitting film layer, and an encapsulation film layer, and the related film layers are the same as those in the prior art, which are not described in detail in the present invention. Of course, in practical applications, those skilled in the art can arrange the relevant film layers on the support structure 20 according to the needs, and the invention is not limited herein.
In a specific implementation process, the display device provided in the embodiment of the present invention may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein nor should they be construed as limiting the present disclosure. The display device can be implemented by referring to the above embodiments, and repeated descriptions are omitted.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A display device, comprising:
the display panel comprises a flat plate part, a bent part and a fixed part, wherein the bent part is positioned between the flat plate part and the fixed part, and the fixed part is bent to the back of the flat plate part through the bent part;
the supporting structure is arranged on the back of the flat plate part and comprises a first adhesive material layer in contact with the flat plate part, a second adhesive material layer in contact with the fixing part and a supporting part positioned between the first adhesive material layer and the second adhesive material layer;
in a direction perpendicular to the flat plate portion, the support portion includes a support layer and a buffer layer cured on a side of the support layer facing the first glue material layer.
2. The display device according to claim 1, wherein a base layer in contact with the second adhesive layer and a third adhesive layer in contact with the fixing portion are provided between the second adhesive layer and the fixing portion.
3. The display device of claim 1 or 2, wherein the flat plate portion includes a bendable region and a non-bendable region other than the bendable region;
the thickness of the buffer layer in the non-bending area is a first thickness, and the thickness of the buffer layer in the bendable area is a second thickness smaller than the first thickness along a direction perpendicular to a bending axis of the flat plate portion.
4. The display device according to claim 3, wherein a thickness of the buffer layer in the non-bending region is the first thickness, and a thickness of the buffer layer in the bendable region is a third thickness smaller than the first thickness, in a direction parallel to the bending axis.
5. The display device according to claim 4, wherein the bendable region includes a central region and first and second edge regions symmetrically disposed with respect to the central region, and a thickness of the buffer layer in the non-bendable region is the first thickness, a thickness of the buffer layer in the central region is the second thickness, and a thickness of the buffer layer in the first and second edge regions is the third thickness smaller than the second thickness, in a direction parallel to the bending axis.
6. The display device according to claim 5, wherein the third thickness decreases as a distance from an edge of the flat plate portion at a position corresponding to the bending axis becomes smaller.
7. The display device according to claim 1, wherein a material of the buffer layer is at least one of thermoplastic polyimide, thermoplastic polyurethane elastomer rubber, polyimide, and polyethylene terephthalate.
8. The display device according to claim 7, wherein the support portion is formed by molding the thermoplastic polyimide or the thermoplastic polyurethane elastomer rubber on the support layer by hot pressing at a temperature of 300 ℃ to 350 ℃ and a pressure of 0.8N to 1.0N for 10s to 15 s.
9. The display device according to claim 7, wherein the support part is formed by coating the polyimide or the polyethylene terephthalate on the support layer and curing at a high temperature.
10. The display device according to claim 7, wherein the supporting layer has a modulus of 100 to 400Gpa, the thermoplastic polyimide has a modulus of 1 to 8Gpa, and the thermoplastic polyurethane elastomer rubber has a modulus of 1 to 500 Mpa.
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