CN108831301A - A kind of flexible display screen and flexible display apparatus - Google Patents
A kind of flexible display screen and flexible display apparatus Download PDFInfo
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- CN108831301A CN108831301A CN201810620256.0A CN201810620256A CN108831301A CN 108831301 A CN108831301 A CN 108831301A CN 201810620256 A CN201810620256 A CN 201810620256A CN 108831301 A CN108831301 A CN 108831301A
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- flexible display
- display screen
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- memory material
- functional layer
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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
Abstract
The present invention provides a kind of flexible display screen and flexible display apparatus, bend technical problem easy to damage to solve flexible display screen in the prior art.The structure includes stacking gradually the first functional layer, memory material layer, buffer layer and the second functional layer of contact setting, and the buffer layer changes with the change in shape of memory material layer.So that the medial and lateral surface displacement difference when elastic deformation stress difference of each successive functional layers is bent by memory material layer is offset, the functional layer in outside is avoided by excessive drawing force, reduce flexible display screen and integrally spring back stress, avoid deformational stress it is excessive caused by film layer falls off, fold, fracture, bubbling etc. use defect.
Description
Technical field
The present invention relates to display screen technology fields, and in particular to a kind of flexible display screen and flexible display apparatus.
Background technique
Flexible display screen is influenced by the physical characteristic of each functional film layer, and there are bending defects, when display screen folds, due to
The presence and difference of each interlamellar deformation stress be will lead between film layer to exist and fall off/shell so that the adhesion strength between film layer is deteriorated
The phenomenon that from, individual rigid fault rupture.
Summary of the invention
In view of this, the embodiment of the present invention is dedicated to providing a kind of flexible display screen and flexible display apparatus, it is existing to solve
There is flexible display screen in technology to bend technical problem easy to damage.
The flexible display screen of the embodiment of the present invention, including stack gradually contact setting the first functional layer, memory material layer,
Buffer layer and the second functional layer, the buffer layer change with the change in shape of memory material layer.
In one embodiment of the invention, the buffer layer close to the side of the memory material size with the display screen
Bending and change.
In one embodiment of the invention, the buffer layer includes several evenly arranged buffer cells.
In one embodiment of the invention, the buffer cell has big end and small end, and the small end is towards the memory material
Layer setting, it is preferable that the gap between the small end of the buffer cell is the 5% to 40% of the buffer cell height.
In one embodiment of the invention, the end face of the big end of the buffer cell is arranged in same plane, the buffer cell
The end face of small end be arranged in same plane, it is preferable that the big end of the buffer cell is connected.
In one embodiment of the invention, the buffer cell is magnetic cushion unit, it is preferable that the adjacent magnetic cushion list
Member maintains its bending state when the flexible display screen is bent.
In one embodiment of the invention, the first functional layer elasticity modulus is different from the second functional layer elasticity modulus,
The memory material layer is close to the lesser functional layer setting of elasticity modulus.
In one embodiment of the invention, the first functional layer cover board, the second functional layer is polaroid.
In one embodiment of the invention, the shape-memory material selects polyimide-type materials, polyurethane material, polyphenyl
The one or several kinds of vinyl material or polymethyl methacrylate class material.
The flexible display apparatus of the embodiment of the present invention, including above-mentioned flexible display screen.
The flexible display screen and flexible display apparatus of the embodiment of the present invention utilize the memory material layer and buffering being stacked
Layer is improved the flexibility between each functional film layer, is solved display screen and existed by the characteristic strong using memory material layer deformability
In bending process between each film layer due to Relative sliding caused by stripping problem, while buffer layer is set on memory material layer,
In display screen bending process, solve buckling problems of each functional film layer of display screen on film stack direction.
Detailed description of the invention
Fig. 1 show the schematic cross-sectional view of one embodiment of the invention flexible display screen.
Fig. 2 show the application state schematic diagram of one embodiment of the invention flexible display screen.
Fig. 3 show the schematic cross-sectional view of one embodiment of the invention flexible display screen.
Fig. 4 show the application state schematic diagram of one embodiment of the invention flexible display screen.
Fig. 5 show the schematic cross-sectional view of one embodiment of the invention flexible display screen.
Fig. 6 show the application state schematic diagram of one embodiment of the invention flexible display screen.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Fig. 1 show the schematic cross-sectional view of one embodiment of the invention flexible display screen.As shown in Figure 1, flexible display screen packet
The first functional layer 01 and the second functional layer 03 are included, it is solid by memory material layer 02 between the first functional layer 01 and the second functional layer 03
Fixed connection.
First functional layer 01 and the second functional layer 03 can be the function such as barrier film layer, cover layer, layer of polarizer, encapsulation film layer
The elasticity modulus of one of ergosphere, each functional layer is inconsistent.
Memory material layer 02 is used to form the apparent surface of difference deformation and is adhesively fixed with successive functional layers.Remember material
For the apparent surface of the bed of material 02 in bending, a surface is with the larger elastic extension deformation of overbending direction, another surface is with bending
The more small ductile deformation in direction keeps being bonded fixation with successive functional layers while forming elastic extension.
Fig. 2 show the application state schematic diagram of one embodiment of the invention flexible display screen.As shown in Fig. 2, when flexible aobvious
When display screen is bent, the first functional layer 01 in conjunction with the inside of memory material layer 02 is due to modulus feature, bending angle is larger and
Crooked process radius is smaller, forms stronger elastic deformation stress and conducts memory material layer 02 inner surface fixed to fitting, so that
02 inner surface of memory material layer forms larger elastic extension, to offset 01 elastic deformation stress of the first functional layer.Meanwhile with note
Recall the second functional layer 03 that the outside of material layer 02 combines due to modulus feature, bending angle it is larger and larger with crooked process radius,
It forms lesser elastic deformation stress and conducts memory material layer 02 outer surface fixed to fitting, so that outside memory material layer 02
Side surface forms more small extension, to offset 03 elastic deformation stress of the second functional layer.Cause the inside and outside of memory material layer 02
Side surface degree of stretch is inconsistent so that the elastic deformation stress difference of each successive functional layers by memory material layer 02 it is interior,
Outer surface shift difference is offset, and is avoided second functional layer 03 in outside by excessive drawing force, is reduced Flexible Displays
The whole rebound stress of screen, avoid deformational stress it is excessive caused by film layer falls off, fold, fracture, bubbling etc. use defect.
As shown in Fig. 2, in the embodiment of the present invention, flexible display screen is after orientation bending, due to degree of stretch difference,
The memory material layer 02 and successive functional layers of original consistent size form stepped profile 04 in screen edge, cause to existing envelope
Drawing and extruding are stretched in assembling structure formation, easily cause the encapsulating structure in flexible display screen use process impaired.
Fig. 3 show the schematic cross-sectional view of one embodiment of the invention flexible display screen.As shown in figure 3, in above-described embodiment
On the basis of basic structure is constant, the edge by that will be located at the first functional layer 01 on the inside of overbending direction is cut, so that first
Profile of the functional layer 01 to the projected outline of the second functional layer 03 less than the second functional layer 03, the inner surface of memory material layer 02
Edge is concordant with the edge of the first functional layer 01, and the outer ledge of memory material layer 02 is concordant with the edge of the second functional layer 03.
Edge seal is carried out on this basis.
Fig. 4 show the application state schematic diagram of one embodiment of the invention flexible display screen.As shown in figure 4, aobvious in flexibility
For display screen after orientation bending, each functional layer is smooth concordant with the profile of memory material layer 02, will not to existing encapsulating structure
Additional deformation pressure is formed, the stability of orientation bending post package structure is maintained.
In an embodiment of the present invention, memory material layer 02 uses a kind of highly viscous OCA of small elastic modulus
(Optically Clear Adhesive) optical cement.The low elastic modulus characteristic that can use OCA optical cement in this way forms note
Recall the larger relative deformation of 02 apparent surface of material layer, while maintaining the bonding to successive functional layers.
In an embodiment of the present invention, memory material layer 02 is laminated using the OCA optical cement of two kinds of elasticity modulus, and every kind
The modulus of OCA optical cement is corresponding with the elastic deformation stress of successive functional layers, and the stronger functional layer of elastic deformation stress is corresponding
The OCA optical cement of smaller modulus, the weaker functional layer of elastic deformation stress correspond to the OCA optical cement of larger modulus.It in this way can be with
The elastic deformation stress that different function layer is offset using the OCA optical cement of dual extension-compression modulus, utilizes the OCA optical cement shape of stacking
It is whole at the bonding for offsetting different directions elastic deformation stress.
02 material of memory material layer in above embodiments of the present invention has a common defects, i.e. flexible display screen is passing through
After the bending of practical application several times, the elastic deformation characteristics of 02 material of memory material layer can be damaged because of the physicochemical characteristics of material
It loses, causes 02 damage of material of memory material layer, screen forms defect.
In an embodiment of the present invention, memory material layer 02 includes shape-memory material.Utilize the list of shape-memory material
Journey shape memory effect, using the original shape of initial manufacture state as the non-bending state shape of memory material layer 02.Work as flexibility
Display screen activates one way shape-memory effect after bending use several times, using thermal signal or electric signal, so that memory material
The bed of material 02 restores the material internal microstructure under shape-memory material original shape under non-bending state, keeps again original
Basic Physical Properties.
In an embodiment of the present invention, the shape-memory material that memory material layer 02 uses includes marmem or shape
Shape remembers organic material.It will be appreciated by those skilled in the art that shape-memory material can be by certain temperature or pressure atmosphere
It is lower using deposition or spraying, formed by the way of spin coating, the viscosity of shape-memory material by material surface modifying realization, and with phase
The fixed fitting of adjacent functional layer.
In an embodiment of the present invention, the shape-memory material that memory material layer 02 uses may include transparent with shape
Polyimide-type materials, polyurethane material, polystyrene type (PS) material or the polymethyl methacrylate of shape memory characteristic
Class (PMMA) material.The above shape-memory material belongs to shape-memory polymer (SMP), using cross-linking method, copolymerization method and molecule
Self-assembly process is formed, and has high light transmittance.Polyurethanes, the polyacrylate, organic silicon polymeric composition for including, make material
Expect that surfacing surface layer has the characteristic of pressure sensitive adhesive, compression causes adhesion strength enhancing, it can be achieved that bonding effect.
In an embodiment of the present invention, memory material layer 02 uses shape-memory material, the opposite table of memory material layer 02
Face is fixed to be bonded adjacent functional layer.
In an embodiment of the present invention, memory material layer 02 uses shape-memory material, at one of memory material layer 02
The surface stacking bonding highly viscous OCA optical cement of one layer of small elastic modulus, for being bonded with adjacent functional layer fixation.In this way may be used
To increase the selectivity of shape-memory material, the elastic deformation stress of partial function layer is eliminated using OCA optical cement.
In an embodiment of the present invention, memory material layer 02 uses shape-memory material, in the opposite of memory material layer 02
The highly viscous OCA optical cement of small elastic modulus is laminated in surface respectively, for being bonded with adjacent functional layer fixation.It can increase in this way
The selectivity for adding shape-memory material is eliminated the elastic deformation stress of corresponding function layer using OCA optical cement, utilizes shape memory
Material is for repetition bending process.
Fig. 5 show the schematic cross-sectional view of one embodiment of the invention flexible display screen.As shown in figure 5, in above-described embodiment
It further include contacting the buffer layer 022 being directly arranged with the stacking of memory material layer 02 on the basis of basic structure is constant.Memory material
Layer 02 uses shape-memory material, and buffer layer 022 includes magnetic controlled buffer cell.
The structure phase that memory material layer 02 is bonded or is embedded in buffer layer 022 in the flexible display screen of the embodiment of the present invention
Adaptation.Memory material layer 02 guarantees that the elastic deformation stress difference of successive functional layers when display screen bending passes through memory material layer 02
Medial and lateral surface displacement difference offset, film layer caused by avoiding deformational stress excessive falls off, fold, fracture, bubbling etc. use
Defect, buffer layer 022 change with the change in shape of memory material layer, guarantee stable state when bending.
As shown in figure 5, buffer layer 022 is embedded in memory material layer 02, buffer layer 022 is spaced apart from each other uniform arrangement including several
Buffer cell 0222, buffer cell 0222 is boss, and the profile of the big end 0225 of boss is greater than the profile of small end 0224, boss
The surface of small end 0224 be in same plane, be arranged towards memory material layer 02, the surface of the big end 0225 of boss is in same
One plane is bonded with the second adjacent functional layer 03, when flexible display screen is bent in place, the side of adjacent buffer unit 0222
0223 adjacent can be bonded.
In an embodiment of the present invention, 0225 edge of big end of boss is connected.So that the face that the big end 0225 of boss is formed
Product size can satisfy the bending with display screen and metamorphosis while remaining fixed.
In an embodiment of the present invention, the gap between buffer cell 0222 be preferably 0222 height of buffer cell 5% to
40%.Actuation trend can be kept more slowly to increase when the mutual attracting process of buffer cell 0222 in this preferred scope,
Quick pick-up shock is avoided the occurrence of, potential harm is caused to display screen.Guarantee buffer layer close to the ruler of memory material side simultaneously
It is very little flexibly to change with the bending of display screen.
Fig. 6 show the application state schematic diagram of one embodiment of the invention flexible display screen.As shown in fig. 6, practical application
In, buffer layer 022 is bent in place with flexible display screen, the controlled buffering list for generating magnetism and side being bonded of buffer cell 0222
Member 0222 generates suction, maintains the bending state of flexible display screen.
In an embodiment of the present invention, magnetic controlled buffer cell 0222 can use adjacent as magnetic cushion unit
The lasting variable attractive force of magnetic cushion unit provides actuation corresponding with bending angle in the flexible display screen bending process
Power avoids changing nature bending speed and use habit.
In an embodiment of the present invention, buffer layer and memory material layer stackup, the frontal projected area of buffer layer are less than described
The frontal projected area of memory material layer.Peripheral edge setting and the consistent annular OCA light of memory material layer profile in buffer layer
Learn glue.So that 02 side of memory material layer and successive functional layers bond, 02 other side of memory material layer is gentle by OCA optical cement
Unit 0222 is rushed to fix with successive functional layers.
In an embodiment of the present invention, memory material layer 02 is close to the lesser functional layer setting of elasticity modulus.
In an embodiment of the present invention, the first functional layer is cover board, and the second functional layer is polaroid.Utilize the flexible of cover board
Property forms involute bending, and better protection can be formed to display screen.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, made any modification, equivalent replacement etc. be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of flexible display screen, which is characterized in that including stack gradually contact setting the first functional layer, memory material layer,
Buffer layer and the second functional layer, the buffer layer change with the change in shape of memory material layer.
2. flexible display screen according to claim 1, which is characterized in that the buffer layer close to the memory material one
The size of side changes with the bending of the display screen.
3. flexible display screen according to claim 1, which is characterized in that the buffer layer includes several evenly arranged slow
Rush unit.
4. flexible display screen according to claim 3, which is characterized in that the buffer cell has big end and small end, institute
It states small end to be arranged towards the memory material layer, it is preferable that the gap between the small end of the buffer cell is that the buffering is single
The 5% to 40% of first height.
5. flexible display screen according to claim 4, which is characterized in that the end face setting of the big end of the buffer cell exists
The end face of same plane, the small end of the buffer cell is arranged in same plane, it is preferable that the big end phase of the buffer cell
Even.
6. flexible display screen according to claim 3, which is characterized in that the buffer cell is magnetic cushion unit, preferably
Ground, the adjacent magnetic cushion unit maintain its bending state when the flexible display screen is bent.
7. flexible display screen according to claim 1, which is characterized in that the first functional layer elasticity modulus and described the
Two functional layer elasticity modulus are different, and the memory material layer is close to the lesser functional layer setting of elasticity modulus.
8. flexible display screen according to claim 1, which is characterized in that the first functional layer cover board, second function
Ergosphere is polaroid.
9. flexible display screen according to claim 1, which is characterized in that the shape-memory material selects polyimide
The one or several kinds of material, polyurethane material, polystyrene material or polymethyl methacrylate class material.
10. a kind of flexible display apparatus, including flexible display screen as described in any one of claim 1 to 9.
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| CN201810620256.0A CN108831301B (en) | 2018-06-15 | 2018-06-15 | Flexible display screen and flexible display device |
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| CN201810620256.0A CN108831301B (en) | 2018-06-15 | 2018-06-15 | Flexible display screen and flexible display device |
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| CN108831301B CN108831301B (en) | 2021-04-27 |
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