CN114220356A - Flexible module of flexible screen and preparation method thereof - Google Patents
Flexible module of flexible screen and preparation method thereof Download PDFInfo
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- CN114220356A CN114220356A CN202210013374.1A CN202210013374A CN114220356A CN 114220356 A CN114220356 A CN 114220356A CN 202210013374 A CN202210013374 A CN 202210013374A CN 114220356 A CN114220356 A CN 114220356A
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- 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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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
The invention provides a flexible module of a flexible screen and a preparation method thereof, wherein the flexible module comprises a support film, a display layer, a barrier film, a TP, a polaroid and a cover plate which are sequentially arranged and attached; the middle part of the support film is provided with a bending area, and the bending area is provided with a plurality of stress release holes which are arranged at intervals in a penetrating way; adhesive layers are respectively arranged between the barrier film and the TP and between the polaroid and the cover plate. The flexible module of the flexible screen provided by the invention adopts a lamination integration technology to realize effective integration of the cover plate, the polaroid, the TP, the barrier film, the display layer and the support film, and the stress relief hole is arranged in the bending area of the support film to realize the stress relief of the flexible module in the bending process, effectively improve the bonding strength of the bending area, avoid the debonding phenomenon of the adhesive layer, ensure that the flexible screen has better mechanical bending performance, not only give consideration to the aspects of optics, touch control, appearance and the like, but also pay more attention to the mechanical bending performance.
Description
Technical Field
The invention belongs to the technical field of flexible screens, and particularly relates to a flexible module of a flexible screen and a preparation method thereof.
Background
A flexible screen, also called a flexible display screen, is a flexible display device made of a flexible material. The flexible screen has important significance for the research and development of high-end intelligent mobile products, notebooks, televisions or intelligent wearable products. Compared with the traditional comprehensive screen, the flexible screen has the characteristics of low consumption, small volume, folding property, bending property, portability and the like, and provides more design ideas for terminal products.
The existing flexible screen needs to be repeatedly bent in the use process, the adhesive layers attached to the upper side and the lower side of the supporting layer are prone to peeling, and the bending position is prone to short circuit and screen microcracks, so that normal use of the flexible screen is affected.
Disclosure of Invention
The invention aims to provide a flexible module of a flexible screen and a preparation method thereof, which can reduce local stress concentration by utilizing a stress release hole and improve the problem of debonding of an adhesive layer.
In order to achieve the purpose, the invention adopts the technical scheme that: the flexible module of the flexible screen comprises a support film, a display layer, a barrier film, a TP (touch panel), a polaroid and a cover plate which are sequentially arranged and attached; the middle part of the support film is provided with a bending area, and the bending area is provided with a plurality of stress release holes which are arranged at intervals in a penetrating way; adhesive layers are respectively arranged between the barrier film and the TP and between the polaroid and the cover plate.
The flexible module is formed by a plurality of film materials which are stacked and arranged, such as a supporting film, a display layer, a barrier film, a TP (touch panel), a polarizer, a cover plate and the like, and the film materials have good flexibility and have the characteristic of bending resistance. The stress release hole that sets up on supporting the membrane can effectively improve the bonding strength of bending region, avoids appearing the glue film and debonds the phenomenon, and then improves the yield of buckling of flexible screen.
In one possible implementation, the stress release holes are any one of oval, rectangular, flower-shaped, triangular, rhombic, pentagonal and hexagonal, and the stress release holes are arranged in a matrix in the bending region. The stress release holes can be selected from various different cross-sectional shapes, and the stress release holes can be selected from different arrangement forms, preferably matrix arrangement forms, so that stress in the bending process can be more uniformly released, and the bending yield of the flexible screen is improved.
In some embodiments, the stress release holes are oval or rectangular, the stress release holes are arranged in a plurality of rows in the bending area, every two adjacent rows of stress release holes are staggered, long forks of every two adjacent rows of stress release holes form an included angle alpha, and the angle alpha is more than or equal to 90 degrees and less than or equal to 150 degrees.
Preferably, the stress release holes are oval or rectangular, and the stress release holes are arranged in rows and columns. Two adjacent rows of stress release holes are arranged in a staggered manner in the column direction. On the basis, the long axes of the two adjacent lines of stress release holes are also mutually crossed to form a certain angle, so that the bending stress in each direction is conveniently released, and the bending resistance of the flexible module is improved.
In one possible implementation, the thickness of the support membrane is t, the minimum aperture of the stress release hole is D, and D is larger than or equal to 1.3 t. The stress release holes have a certain relation with the thickness of the support film, and the larger the thickness of the support film is, the larger the aperture of the stress release holes is, so that the stress is conveniently released, and the bending effect of the support film is ensured. The selection of the range value is convenient for releasing stress efficiently, and the self structural performance of the support film can be ensured.
In some embodiments, the stress release holes have a major axis dimension of 100-120 microns and a minor axis dimension of 80-100 microns. The stress release holes are arranged to be oval or rectangular hole patterns, and the major axis size and the minor axis size of the stress release holes meet the numerical range, so that the stress is conveniently released, and the bending performance of the flexible module is improved.
In a possible realization mode, the distance between two adjacent stress release holes is 3-5mm, and the distance between the stress release holes and the edge of the bending area is more than or equal to 1 mm. In actual use, in order to avoid the influence of the stress release holes on the edge of the bending region, the stress release holes and the edge of the bending region should be spaced by a certain width. The distance between two adjacent stress release holes is controlled within the range of 3-5mm, so that the supporting effect of the supporting film is ensured, the stress is effectively released in the bending process, and the problems of layering and degumming of the flexible module are avoided.
In one possible implementation mode, the supporting film is a steel plate component, the thickness of the supporting film is 50-75 microns, and the elastic film quantity of the supporting film is 2.4-2.6 Gpa. The supporting film is made of a steel plate, the thickness of the supporting film is 50-75 microns, the supporting effect of the supporting film is guaranteed, the overall thickness of the flexible module is reduced as much as possible, and the problems of degumming and the like in the bending process are avoided.
The elastic modulus refers to the stress divided by the strain in that direction in the unidirectional stress state. In the elastic deformation stage of the material, the stress and the strain are in a proportional relation, namely the material conforms to Hooke's law, and the proportionality coefficient of the material is called elastic modulus. The elastic modulus is a physical quantity for describing the elasticity of the substance, namely a dimension for measuring the elastic deformation resistance of the object, and the selection of the elastic modulus value enables the support screen to have good elastic deformation capacity so as to be matched with the bending of the flexible module to be carried out and improve the bending yield of the flexible module.
In one possible realization, an elastic foam layer is arranged on the outer side surface of the support film. The foam is a material foamed by plastic particles, and is called foam for short. The foam is divided into PU foam, antistatic foam, conductive foam and other different types. Through setting up the cotton layer of elasticity bubble, make the connection of supporting membrane and external member have certain elasticity, avoided the influence that vibrations caused.
The shown scheme of this application embodiment, compared with the prior art, the flexible module of the flexible screen that this application embodiment provided, adopt stromatolite integrated technology, the apron has been realized, the polaroid, TP, the barrier film, the display layer and support the effective integration of membrane, through set up stress release hole in the bending zone who supports the membrane, realize the elimination of flexible module bending in-process stress, improve the adhesive strength in bending zone effectively, avoid appearing the adhesive layer debonding phenomenon, make the flexible screen have better mechanical bending performance, not only compromise optics, aspects such as touch-control and outward appearance, also pay attention to mechanical bending performance more.
Based on the same inventive concept, the invention also provides a manufacturing method of the flexible module based on the flexible screen, which comprises the following steps:
s100: manufacturing a TFT substrate:
cleaning a glass substrate by using a cleaning agent and ultrapure water to remove foreign matters on the surface, and then forming a metal film on the surface of a clean first glass substrate by sputtering deposition (namely, in an approximately vacuum environment, an electric field is used for accelerating an inert element to bombard a metal target material, metal atoms are sputtered out, and the metal atoms are deposited on the substrate to form the film). And uniformly coating a layer of photoresist on the surface of the metal film, then exposing by ultraviolet rays through the photoresist, dissolving the exposed part of the photoresist by a developing solution, and leaving part of the pattern to present the required shape.
And putting the first glass substrate into corresponding etching solution or etching gas, and etching off the film which is not covered by the photoresist. And removing the residual photoresist by using chemical stripping liquid to leave a metal film with a required shape, and finishing one-time photoetching. An insulator or a semiconductor thin film is formed by chemical vapor deposition (i.e., an insulator or a semiconductor thin film is formed by reacting a specific gas in a plasma state and attaching the resultant to the surface of a substrate, and then the semiconductor or the insulator thin film is processed into a desired shape by photolithography). The film deposition and photoetching processes are repeated for 4-5 times, and films with different materials and shapes of each layer are laminated on the first glass substrate to form a thin film transistor array and an interconnection line, so that the TFT substrate is manufactured, and the quality is detected.
Manufacturing a CF substrate:
cleaning the second glass substrate with a cleaning agent or ultrapure water, removing foreign matters on the surface, coating a black photosensitive resin material, exposing, developing and forming a black matrix, then coating a photosensitive red organic photosensitive layer, exposing, developing and forming a red filter layer.
And repeating the process, sequentially laminating a green filter layer and a blue filter layer on the red filter layer, and integrally depositing a layer of transparent conductive film (ITO) on the red filter layer, the green filter layer and the blue filter layer to be used as a common electrode of all pixel voltage signals. And finally, coating a layer of transparent photosensitive resin material on the uppermost layer of the substrate, and forming a spacer (PS) through processes of exposure, development and the like to finally obtain the CF substrate.
Laminating the TFT substrate and the CF substrate to obtain a display layer:
cleaning the array substrate (TFT substrate) and the color film substrate (CF substrate) by using a cleaning agent and ultrapure water, respectively coating PI films on the surface layers of the array substrate (TFT substrate) and the color film substrate (CF substrate) to form orientation layers, respectively rubbing the surfaces of the TFT substrate and the CF substrate along a specific direction by using a roller wrapped with chemical fiber or pure cotton flannelette, dripping liquid crystal molecules at the position of the TFT substrate corresponding to a display area, and coating frame sealing glue on the area of the CF substrate corresponding to a display boundary. The operation can also adopt that liquid crystal molecules are dripped at the position of the CF substrate corresponding to the display area, and frame sealing glue is coated at the area of the TFT substrate corresponding to the display boundary.
The TFT substrate and the CF substrate are pressed together under a vacuum environment to form a display layer. In the display area sealed by the frame sealing glue, the liquid crystal is uniformly diffused and filled in the display area, and the frame sealing glue is cured under the irradiation of ultraviolet rays and the heating condition. Cutting the bonded display layer according to the required size, polishing the edge to ensure the smooth edge, adding an electric signal to detect the display screen, and packaging the laminated display layer by using a tape type thin film flip chip packaging device.
S200: attaching TP to the polarizer and attaching the barrier film to the display layer;
s300: adhering the outer side surface of the barrier film and the outer side surface of the TP by using an adhesive layer;
s400: adhering the cover plate to the outer side face of the polaroid by using the adhesive layer, and attaching the display layer to the outer side face of the barrier film;
s500: and attaching the support film to the outer side surface of the display layer, wherein the attaching operation is performed by respectively attaching soft-to-hard attaching equipment.
When the cover plate and the polarizer are bonded, OCA (optically Clear adhesive) is adopted, wherein OAC (optically Clear adhesive) is a special adhesive for cementing transparent optical elements (such as lenses and the like), and the adhesive has the characteristics of colorless transparency, light transmittance of over 95 percent, good cementing strength, capability of being cured at room temperature or middle temperature, small curing shrinkage and the like.
In order to improve the manufacturing efficiency, the attaching of the TP and the polaroid and the attaching of the barrier film and the display layer are arranged to be parallel and parallel, the TP and the polaroid are synchronously carried out, and then the TP and the polaroid are attached together to form a whole so as to improve the operation efficiency. After the display layer is manufactured subsequently, the display layer is attached to the whole, the cover plate is attached to the polarizing plate, the process of attaching the display layer and the cover plate can be carried out synchronously, and the manufacturing efficiency of the flexible screen is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a flexible module of a flexible screen according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of a support film provided in the embodiments of the present invention;
FIG. 3 is a schematic structural diagram of another embodiment of a support film according to the present invention;
fig. 4 is a schematic structural diagram of a support film according to still another embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1. a cover plate; 2. a polarizer; 3. TP; 4. a barrier film; 5. a display layer; 6. a support film; 7. an elastic foam layer; 81. a first OAC optical clear adhesive layer; 82. a second OAC optical clear adhesive layer; 91. a bending zone; 92. a stress release hole.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or be indirectly on the other element. It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and are therefore not to be considered limiting. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or several of that feature. In the description of the present invention, "a number" means two or more unless specifically limited otherwise.
Referring to fig. 1 to 4, a flexible module of a flexible screen according to the present invention will now be described. The display panel comprises a support film 6, a display layer 5, a barrier film 4, TP3, a polaroid 2 and a cover plate 1 which are sequentially arranged and attached; the middle part of the support membrane 6 is provided with a bending area 91, and the bending area 91 is provided with a plurality of stress release holes 92 which are arranged at intervals in a penetrating way; adhesive layers are respectively arranged between the barrier film 4 and the TP3 and between the polaroid 2 and the cover plate 1.
As a specific embodiment, the stress release holes 92 are any one of oval, rectangular, flower-shaped, triangular, rhombic, pentagonal and hexagonal, and the stress release holes 92 are arranged in a matrix in the bending region 91.
In some embodiments, the stress releasing holes 92 are oval or rectangular, the stress releasing holes 92 are arranged in several rows in the bending region 91, two adjacent rows of the stress releasing holes 92 are staggered, and the long fork of two adjacent rows of the stress releasing holes 92 forms an included angle α, which is greater than or equal to 90 degrees and less than or equal to 150 degrees. The thickness of the support membrane 6 is t, the minimum aperture of the stress release hole 92 is D, and D is more than or equal to 1.3 t. The stress release holes 92 have a major axis dimension of 100-120 microns and a minor axis dimension of 80-100 microns.
Furthermore, the distance between two adjacent stress release holes 92 is 3-5mm, and the distance between the stress release holes 92 and the edge of the bending area 91 is more than or equal to 1 mm.
In one possible implementation manner, the support membrane 6 is a steel plate member, the thickness of the support membrane 6 is 70 micrometers to 80 micrometers, and the elastic film amount of the support membrane 6 is 2.4 to 2.6 Gpa. When the supporting film 6 is connected with an external member, an elastic foam layer 7 is arranged between the supporting film and the external member.
The manufacturing method of the flexible module for manufacturing the flexible screen comprises the following steps:
s100: respectively manufacturing a TFT substrate and a CF substrate; laminating the TFT substrate and the CF substrate to obtain a display layer 5;
s200: attaching TP3 to the polarizer 2, and attaching the barrier film 4 to the display layer 5;
s300: bonding the outer side of the barrier film 4 to the outer side of TP3 with an adhesive layer (i.e., first OAC optically clear adhesive layer 81);
s400: adhering the cover plate 1 to the outer side surface of the polarizer 2 by using an adhesive layer (namely, a second OAC optical transparent adhesive layer 82), and attaching the display layer 5 to the outer side surface of the barrier film 4;
s500: and attaching the support film 6 to the outer side surface of the display layer 5.
And performing analog analysis and detection on the flexible screen by using ABAQUS software. The ABAQUS software is a finite element software for engineering simulations that address problems ranging from relatively simple linear analysis to many complex non-linear problems. ABAQUS includes a rich library of cells that can simulate arbitrary geometries. The simulation tool has various types of material model libraries, can simulate the performance of typical engineering materials, comprises metal, rubber, high polymer materials, composite materials, reinforced concrete, compressible super-elastic foam materials, soil, rock and other geological materials, and is a universal simulation tool.
For convenience of description, the adhesive layer is made of OCA optical clear adhesive, the OCA optical clear adhesive between the cover plate 1 and the polarizer 2 is defined as a first OCA optical clear adhesive layer 81, and the OCA optical clear adhesive between the TP3 and the barrier film 4 is defined as a second OCA optical clear adhesive layer 82.
Since the second OCA optical transparent adhesive layer 82 is easy to peel off and the TP3 and the barrier film 4 adjacent to the second OCA optical transparent adhesive layer are flexible, the stress value of the second OCA optical transparent adhesive layer 82 and the bending resistance of the flexible module can be displayed according to the ABAQUS simulation data result.
The following examples obtain stress values and strain values of the second OCA optical clear adhesive layer 82 by simulating a flexible screen, and set the corresponding examples and comparative examples to compare the above parameters, and if the examples can obtain smaller stress values and strain values than the comparative examples, it can be proved that the above structure provided with the stress release holes 92 has better mechanical bending performance. The TP3(touch panel) is used as a protective layer of the polarizer 2, so that the material cost can be reduced.
Example 1:
in the ABAQUS software, multiple layers of cover plate 1, first OCA optically clear adhesive layer 81, polarizer 2, TP3, second OCA optically clear adhesive layer 82, barrier film 4, display layer 5, support film 6, foam 7 were created and each assigned their respective material properties, and the layers were assembled in order.
Referring to fig. 2, the thickness of the support film 6 is 75 μm, the elastic modulus is 2.5Gpa, the stress release holes 92 disposed in the bending region 91 of the support film 6 are arranged in rows and columns, and the shape of the stress release holes 92 is elliptical; and sets the entire module grid to 1, runs and outputs data.
Comparative example 1:
in the ABAQUS software, multiple layers of cover plate 1, first OCA optically clear adhesive layer 81, polarizer 2, TP3, second OCA optically clear adhesive layer 82, barrier film 4, display layer 5, support film 6, foam 7 were created and each assigned their respective material properties, and the layers were assembled in order.
Wherein, the thickness of the supporting film 6 is 75 micrometers, the elastic modulus is 2.5GPa, and the bending area 91 of the supporting film 6 is not provided with the stress release hole 92; the entire module grid is set to 1, and data is run and output.
The output parameters of example 1 and comparative example 1 are shown in table 1, and it can be seen that the stress value of the second OCA optical transparent adhesive layer 82 in example 1 is 0.235Mpa and the strain value is 0.01478, which are respectively less than the stress value of the second OCA optical transparent adhesive layer 82 in comparative example 1, which is 0.262Mpa and the strain value is 0.02435. In particular, the strain value in example 1 is much smaller than that in comparative example 1. The comparison of the data shows that the stress release holes 92 are formed in the bending region 91 of the support film 6 to effectively improve the bonding strength of the second OCA optical transparent adhesive layer 82, so that the stress strain value is reduced.
Example 2:
in the ABAQUS software, multiple layers of cover plate 1, first OCA optically clear adhesive layer 81, polarizer 2, TP3, second OCA optically clear adhesive layer 82, barrier film 4, display layer 5, support film 6, foam 7 were created and each assigned their respective material properties, and the layers were assembled in order.
Referring to fig. 3, the thickness of the support film 6 is 75 μm, the elastic modulus is 2.5Gpa, the stress releasing holes 92 disposed in the bending region 91 of the support film 6 are staggered in the row direction, the included angle between the major axes of two upper and lower rows of the stress releasing holes 92 is α, α is 60 °, that is, the stress releasing holes 92 disposed with their major axes along the vertical direction are rotated 30 ° counterclockwise around their centers, the stress releasing holes 92 adjacent thereto are rotated 30 ° clockwise around their centers, the included angles between the major axes of the two rows of the stress releasing holes 92 and the horizontal line are 60 °, and the shape of the stress releasing holes 92 is set to be elliptical. The entire module grid is set to 1, and data is run and output.
Comparative example 2:
in the ABAQUS software, multiple layers of cover plate 1, first OCA optically clear adhesive layer 81, polarizer 2, TP3, second OCA optically clear adhesive layer 82, barrier film 4, display layer 5, support film 6, foam 7 were created and each assigned their respective material properties, and the layers were assembled in order.
Referring to fig. 4, the thickness of the support film 6 is 75 μm, the elastic modulus is 2.5Gpa, the stress releasing holes 92 disposed in the bending region 91 of the support film 6 are staggered in the row direction, the included angle between the long axes of two upper and lower rows of the stress releasing holes 92 is α, α is 60 °, that is, the stress releasing holes 92 whose long axes are disposed along the vertical direction are rotated 30 ° counterclockwise around the center thereof, the stress releasing holes 92 adjacent thereto are rotated 30 ° clockwise around the center thereof, the included angles between the long axes of the two rows of the stress releasing holes 92 and the horizontal line are 60 °, respectively, and the shape of the stress releasing holes 92 is rectangular. The entire module grid is set to 1, and data is run and output.
The output parameters of the above example 2 and comparative example 2 are shown in table 1, and it can be seen that the stress value of the second OCA optical clear adhesive layer 82 in example 2 is 0.159Mpa and the strain value is 0.01089, which are respectively less than the stress value of the second OCA optical clear adhesive layer 82 in comparative example 1, which is 0.178Mpa and the strain value is 0.01365. The strain value and the strain value in example 2 were both reduced as compared with those in comparative example 2. The comparison of the above data shows that the provision of the elliptical stress release hole 92 in the bending region 91 of the support film 6 can effectively improve the bonding strength of the second OCA optical transparent adhesive layer 82, and the stress strain value is smaller than that of the provision of the rectangular stress release hole 92.
Table 1:
on this basis, the following comparisons were made:
as can be seen from comparison between example 1 and example 2, when the upper and lower rows of stress release holes 92 disposed in the bending region 91 of the support film 6 are disposed in a staggered manner, and when the long axes of two adjacent rows of stress release holes 92 are staggered to form a horizontal included angle of 60 °, the adhesive strength of the adhesive layer is significantly improved, that is, when the long axis directions of two rows of stress release holes 92 are in a non-uniform direction, the stress release effect is better.
The data of comparative example 2 and comparative example 2 can be concluded that, when the stress release hole 92 is oval, the effect of improving the bonding strength of the adhesive layer is better, and the phenomenon that the adhesive layer is debonded after the flexible screen is bent for several times can be avoided. .
The flexible module of the flexible screen that this embodiment made through above-mentioned method, compared with the prior art, above-mentioned flexible screen adopts stromatolite integration technique, apron 1 has been realized, polaroid 2, TP3, barrier film 4, the effective integration of display layer 5 and support membrane 6, through set up stress release hole 92 in the bending zone 91 that supports membrane 6, realize the elimination of flexible module bending in-process stress, can effectively improve the adhesive strength of bending zone 91, avoid appearing the adhesive layer debonding phenomenon, make the flexible screen have better mechanical bending performance, not only compromise optics, aspects such as touch-control and outward appearance, also pay more attention to mechanical bending performance.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The flexible module of the flexible screen is characterized by comprising a support film, a display layer, a barrier film, a TP, a polaroid and a cover plate which are sequentially arranged and attached; the middle part of the support film is provided with a bending area, and the bending area is provided with a plurality of stress release holes which are arranged at intervals in a penetrating way; adhesive layers are respectively arranged between the barrier film and the TP and between the polaroid and the cover plate.
2. A flexible module of a flexible screen according to claim 1, wherein the stress release holes are any one of an oval shape, a rectangular shape, a flower shape, a triangular shape, a diamond shape, a pentagonal shape and a hexagonal shape, and are arranged in a matrix in the bending region.
3. The flexible module of flexible screen of claim 2, wherein said stress release holes are oval or rectangular, said stress release holes are provided in several rows in said bending area, two adjacent rows of said stress release holes are staggered, the long fork of two adjacent rows of said stress release holes is in α angle, α is greater than or equal to 90 ° and less than or equal to 150 °.
4. The flexible module of flexible screen of claim 1, wherein the thickness of the support membrane is t, the minimum aperture of the stress release hole is D, D ≧ 1.3 t.
5. The flexible module of claim 1, wherein the stress release hole has a major axis dimension of 100-120 microns and a minor axis dimension of 80-100 microns.
6. The flexible module of the flexible screen as claimed in claim 1, wherein the distance between two adjacent stress release holes is 3-5mm, and the distance between the stress release hole and the edge of the bending area is more than or equal to 1 mm.
7. The flexible module of the flexible screen of claim 1, wherein the support film is a steel plate member, the support film has a thickness of 50-75 μm, and the support film has an elastic film amount of 2.4-2.6 Gpa.
8. A flexible module for a flexible screen according to claim 1, characterized in that an elastic foam layer is provided on the outer side of the support film.
9. A method for manufacturing a flexible module based on the flexible screen of any one of claims 1-8, comprising the following steps:
s100: manufacturing a display layer;
s200: attaching TP to the polarizer, and attaching a barrier film to the display layer;
s300: adhering the outer side surface of the barrier film and the outer side surface of the TP by using an adhesive layer;
s400: adhering a cover plate to the outer side face of the polaroid by using an adhesive layer, and attaching the display layer to the outer side face of the barrier film;
s500: and attaching the support film to the outer side surface of the display layer.
10. The method for manufacturing the flexible module of the flexible screen according to claim 9, wherein the step S100 includes respectively manufacturing a TFT substrate and a CF substrate, and laminating the TFT substrate and the CF substrate to obtain the display layer.
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