CN109712530A - Flexible display apparatus and preparation method thereof - Google Patents
Flexible display apparatus and preparation method thereof Download PDFInfo
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- CN109712530A CN109712530A CN201811628769.2A CN201811628769A CN109712530A CN 109712530 A CN109712530 A CN 109712530A CN 201811628769 A CN201811628769 A CN 201811628769A CN 109712530 A CN109712530 A CN 109712530A
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- protective layer
- bending
- display apparatus
- bent area
- flexible display
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Abstract
The embodiment of the invention provides a kind of flexible display apparatus and preparation method thereof, the flexible substrate of the flexible display apparatus has the first flat region, bent area and the second flat region；Bent area setting the first bending protective layer of flexible substrate reduces folding s tress to reduce bending difficulty before bending；Bent area setting the second bending protective layer of flexible substrate after bending; the creep occurred after the first bending protective layer can be prevented to bend; and protective effect further can be provided for bent area; to prevent reducing to the wiring layer protective capability being arranged in flexible substrate and flexible substrate because of the first bending protective agent; causing the wiring being arranged in flexible substrate and flexible substrate, there is a phenomenon where crackles, and then improve the display effect of flexible display apparatus.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of flexible display apparatus and preparation method thereof.
Background technique
The changeable type flexible energy of flexible display apparatus, is widely applied it.The system of current flexible display apparatus
Make mainly to carry flexible substrate using carrier substrate as carrier, and forms display device on flexible substrates；It again will be flexible
The display panel of substrate and the isolated flexible display apparatus of carrier substrate；Then by display panel and flexible circuit board and/or
Chip etc. is bound together.
The display panel of flexible display apparatus includes viewing area and non-display area, and viewing area is used to show pictograph etc.,
Wiring, binding flexible circuit board and/or chip etc. are set in non-display area.It, can for the narrow frame for realizing flexible display apparatus
The non-display area for binding the display panel of flexible circuit board and/or chip is folded into the back side of display screen.And in Flexible Displays
When device is bent, crackle can occur for the wiring being arranged in the flexible display panels and/or flexible display panels of flexible display apparatus,
This will affect the display effect of flexible display apparatus.In the prior art, by before the bending of the display panel of flexible display apparatus
Bent area coated UV solidification glue, the uv-curable glue have certain stretch modulus, can be protected when bending deformation soft
The bent area of property display device.But the coated UV solidification glue before display panel is bent, enduringly Flexible Displays can not be filled
The wiring being arranged in the flexible display panels and flexible display panels set is protected, and then influences display effect.
Summary of the invention
The embodiment of the present invention provides a kind of flexible display apparatus and preparation method thereof, is able to solve in the prior art because of bending
The bending protective layer of preceding coating can not protect for a long time the wiring being arranged in flexible display panels and flexible display panels
The technical issues of protecting, influencing display effect.
In a first aspect, the embodiment of the invention provides a kind of flexible display apparatus, comprising:
Flexible substrate；The flexible substrate includes the first flat region, bent area and the second flat region；First flat region
It is oppositely arranged with second flat region；The bent area connects first flat region and second flat region；
It is located at least in the first bending protective layer of the bent area；
It is located at least in the second bending protective layer of the bent area；
The elasticity modulus of the second bending protective layer is greater than the elasticity modulus of the first bending protective layer.
Second aspect, the embodiment of the invention provides a kind of preparation methods of flexible display apparatus, comprising:
One flexible substrate is provided；The flexible substrate includes the first flat region, bent area and the second flat region；The bending
Area connects first flat region and second flat region；
At least the first bending protective layer is formed in the bent area；
Second flat region is bent by the bent area to first flat region and is filled away from the Flexible Displays
The side for the display surface set is oppositely arranged first flat region with second flat region；
At least the second bending protective layer is formed in the bent area；
The elasticity modulus of the second bending protective layer is greater than the elasticity modulus of the first bending protective layer.
The embodiment of the invention provides a kind of flexible display apparatus and preparation method thereof, the flexible liners of the flexible display apparatus
Bottom has the first flat region, bent area and the second flat region；Wherein, the first flat region and the second flat region are oppositely arranged, and logical
Cross bent area connection；By in bent area setting the first bending protective layer, with when flexible substrate is bent, to flexible substrate and
The wiring being arranged in flexible substrate provides protective effect, and bent area setting the second bending protective layer after bending, and second
The elasticity modulus for bending protective layer is greater than the elasticity modulus of the first bending protective layer, so as to prevent the first bending protective layer from existing
The creep occurred after bending provides protective effect to the first bending protective layer, solves curved because of flexible substrate in the prior art
Creep occurs for the bending protective layer of folding area, causes the wiring being arranged in flexible substrate and/or flexible substrate that crackle occurs, influences to show
The technical issues of showing effect.The first bending protective layer is arranged by the bent area of the flexible substrate before bending in the embodiment of the present invention,
Difficulty is bent to reduce, reduces folding s tress；Bent area setting the second bending protective layer of flexible substrate, can hinder after bending
The only creep that occurs after the first bending protective layer bending, and further can provide protective effect for bent area, thus prevent because
First bending protective agent reduces the wiring layer protective capability that is arranged in flexible substrate and flexible substrate, causes flexible substrate and soft
Property substrate on the wiring that is arranged there is a phenomenon where crackles, and then improve the display effect of flexible display apparatus.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of flexible display apparatus before a kind of bending provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of flexible display apparatus provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another flexible display apparatus provided in an embodiment of the present invention；
Fig. 4 is a kind of overlooking structure diagram of flexible display apparatus provided in an embodiment of the present invention；
Fig. 5 is a kind of cross section structure schematic diagram of flexible display apparatus provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another flexible display apparatus provided in an embodiment of the present invention；
Fig. 7 is a kind of flow chart of the preparation method of flexible display apparatus provided in an embodiment of the present invention；
Fig. 8 is the flow chart of the preparation method of another flexible display apparatus provided in an embodiment of the present invention；
Fig. 9 is the flowage structure schematic diagram of the preparation method of another flexible display apparatus provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of another flexible display apparatus provided in an embodiment of the present invention；
Figure 11 is the flowage structure schematic diagram of the preparation method of another flexible display apparatus provided in an embodiment of the present invention；
Figure 12 is the flow chart of the preparation method of another flexible display apparatus provided in an embodiment of the present invention；
Figure 13 is also a kind of flow chart of the preparation method of flexible display apparatus provided in an embodiment of the present invention；
Figure 14~Figure 18 is also a kind of flowage structure of the preparation method of flexible display apparatus provided in an embodiment of the present invention
Schematic diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Since flexible display apparatus has the flexible performance of changeable type, flexible display apparatus can be bent, and
The bent area setting bending protective layer of flexible display apparatus, in the process of bending, to the component of flexible display apparatus bent area
It is protected.But the coating bending protective layer before display device is bent, protective layer is bent after bending can have certain stretching
Strain.And protective layer is bent for a long time when being in tensional state, it may occur that permanent deformation, stretch modulus drop occurs in creep
It is low, the protective capability of flexible display apparatus bent area is reduced, the component of flexible display apparatus bent area can not be implemented to protect
Effect, so that the flexible display apparatus of flexible display apparatus and the wiring of flexible display apparatus bent area setting are split
Line, and then influence the display effect of flexible display apparatus.
To solve the above problems, a kind of flexible display apparatus provided in an embodiment of the present invention, Fig. 1 is that the embodiment of the present invention mentions
The structural schematic diagram of flexible display apparatus before a kind of bending supplied.Such as Fig. 1, flexible display apparatus 100 includes flexible substrate 10, should
Flexible substrate 10 has the first flat region 11, bent area 13 and the second flat region 12；Wherein, in the soft of flexible display apparatus 100
Property substrate 10 bend after, the first flat region 11 and the second flat region 12 are oppositely arranged, and bent area 13 connect the first flat region 11
With the second flat region 12.After the bending of flexible substrate 10, bent area 13 is between the first flat region 11 and the second flat region 12.
Wherein, the first flat region 11 and the second flat region 12 of flexible substrate 10 may be provided with the more of flexible aobvious device 100
A pixel unit, to realize the double-sided display or curved-surface display of flexible display apparatus；Alternatively, the first flat region of flexible substrate 10
11 may be provided with multiple pixel units of flexible display apparatus 100, and the second flat region 12 can be used for binding flexible display apparatus
100 integrated chip, circuit board etc., to realize the narrow frame of flexible display apparatus 100.
Before the flexible substrate 10 of flexible display apparatus 100 is bent, flexible display apparatus 100 further includes being located at least in flexibility
First bending protective layer 20 of the bent area 13 of substrate 10.The first bending protective layer 20 has certain elastic deformation ability,
When the flexible substrate 10 of flexible display apparatus 100 is bent, the bending difficulty of flexible substrate 10 can reduce, reduce flexible substrate
Suffered folding s tress plays guarantor to the bent area 13 of flexible substrate 10 to prevent flexible substrate 10 from cracking when 10 bending
Shield effect.Wherein, which includes ultraviolet cured adhesive layer.
In addition, at least being set in the bent area of flexible substrate 10 13 after the flexible substrate 10 of flexible display apparatus 100 is bent
The second bending protective layer (not shown) is set, which can be located at the first bending protective layer 20 and deviate from flexible liner
The side that the side at bottom or flexible substrate 10 bend protective layer 20 away from first, and the elasticity modulus of the second bending protective layer
Greater than the elasticity modulus of the first bending protective layer 10.Wherein, it is greater than the first bending in the elasticity modulus of the second bending protective layer to protect
Under the premise of the elasticity modulus of sheath 10, the second bending protective layer includes ultraviolet cured adhesive layer or heat cure glue-line.
The flexible display apparatus 100 of the present embodiment is bent by the flexible substrate 10 to flexible display apparatus 100, can
By the back side of the non-display area bending display surface of flexible display apparatus 100, to reduce the frame face of flexible display apparatus 100
Product；Alternatively, realizing the Curved screen of flexible display apparatus 100 by the bendable folding endurance of flexible substrate 10 in flexible display apparatus 100
Or the function that double-sided screen is shown.Before flexible substrate 10 is bent, flexible substrate 10 is at least covered by being arranged in flexible substrate 10
Bent area 13 first bending protective layer 20, in bending process flexible substrate 10 bent area 13 implement protective effect,
And after flexible substrate bending, at least in the setting of the bent area of flexible substrate 10 13 second bending protective layer, on the one hand, second is curved
Folding protective layer is arranged after the bending of flexible substrate 10, and the second bending protective layer is in the state of zero strain, Bu Huisui at this time
The passage of time, occur creep；On the other hand, the second bending protective layer in zero strain state, can be in the first bending
When creep occurs for protective layer, the strain of the first bending protective layer 20 is prevented to increase, suffered by the bent area 13 for reducing flexible substrate 10
Stress, so that the bent area for flexible substrate 10 provides protective effect.Meanwhile second the elasticity modulus of bending protective layer be greater than the
The elasticity modulus of one bending protective layer 20, it is known that the difficulty of the flexible deformation of the second bending protective layer is greater than the first bending protective layer
20, so in the first bending 20 creep of protective layer, the second bending protective layer can prevent the first bending protective layer 20 from continuing shape
Become, so as to prevent from causing the bent area 13 of flexible substrate 10 cracked because of the first bending 20 deformation of protective layer, influencing soft
The phenomenon that display effect of property display device, generates.
It should be noted that the second bending protective layer of flexible display apparatus can be bent to first in the embodiment of the present invention
Play supplement protection, the relative position of the second bending protective layer and the first bending protective layer in the bent area that protective layer is protected
It can correspondingly be adjusted according to actual needs.
Optionally, Fig. 2 is a kind of structural schematic diagram of flexible display apparatus provided in an embodiment of the present invention.Such as Fig. 2, first
Bending protective layer 20 be located at flexible substrate 10 towards flexible display apparatus 100 display surface 110 side；Second bending protective layer
30 are located at the side that the first bending protective layer 20 deviates from flexible substrate 10.
Specifically, the flexible substrate 10 due to flexible display apparatus 100 is generally directed toward the back side of flexible display apparatus 100
(side of display surface 110 in flexible display apparatus 100) bending, with realize flexible display apparatus 100 narrow frame or
Curved-surface display.When the flexible substrate 10 of flexible display apparatus 100 is bent, it is located at display surface 110 1 in flexible display apparatus 100
Tensile stress suffered by the bent area 13 of side is larger, causes the risk of breakage of the bent area 13 of the flexible substrate 10 of display surface 110
Greatly.By being arranged in flexible substrate 10 towards the side of 100 display surface 110 of flexible display apparatus before the bending of flexible substrate 10
First bending protective layer 20, and the first bending protective layer 20 at least covers the bent area 13 of flexible substrate 10, to reduce flexibility
The bending difficulty of substrate 10 reduces folding s tress suffered when flexible substrate 10 is bent, and prevents flexible substrate 10 when bending from generating
Crackle etc. shields to the bent area 13 of flexible substrate 10.
After the bending of flexible substrate 10, first bending protective layer 20 of bent area 13 is in the shape stretched in flexible substrate 10
State, and prolonged tensional state can make the first bending protective layer 20 that creep occur.Flexible substrate 10 bending after, by
First bending protective layer 20 is away from the side of flexible substrate 10 setting the second bending protective layer 30, and the second bending protective layer 30
At least cover the bent area 13 of flexible substrate 10.The the second bending protective layer 30 formed after the bending of flexible substrate 10 has smaller
Strain or be in zero strain state, therefore creep will not occur for the second bending protective layer 30, and bend protective layer 20 first
When creep occurs, stress suffered by the bent area 13 of flexible substrate 10 can be reduced by the second bending protective layer 30, prevent flexibility
Substrate 10 cracks, and shields to flexible substrate 10.
Optionally, Fig. 3 is the structural schematic diagram of another flexible display apparatus provided in an embodiment of the present invention.It is soft such as Fig. 3
Property display device 100 further includes cover board 40, and cover board 40 is located at display surface 110 of the flexible substrate 10 towards flexible display apparatus 100
Side；Gap setting between bent area 13 and cover board 40 has the second bending protective layer 30.
Specifically, cover board 40 can prevent the device of display surface 110 in flexible display apparatus 100 to be hit and damage, it is
Flexible display apparatus 100 provides protective effect.After the bending of flexible display apparatus 100, due to the bent area 13 of flexible substrate 10
With certain bending radian, cause that there is gap between cover board 40 and flexible substrate 10, so that the bent area of flexible substrate 10
13, without support, will affect the mechanical performance of flexible substrate 10.The second bending protection being arranged after the bending of flexible display apparatus 100
Layer 30 covers the bent area 13 of flexible substrate 10, and fills the gap between cover board 40 and bent area 13.On the one hand, the second bending
Protective layer 30 can provide protective effect to flexible substrate 10 after creep occurs for the first bending protective layer 30；On the other hand,
Two bending protective layers 30 are contacted with cover board 40, and fill the gap between cover board 40 and bent area 13, can be flexible substrate 10
Bent area provide a supporting role, to fix flexible substrate 10, enhance the mechanical performance of flexible substrate 10.In addition, it is optional,
It is additionally provided with functional film layer 50 between cover board 40 and the first flat region 11 of flexible substrate 10, which can be polarisation
Piece, touch control layer etc..
Optionally, referring to figs. 2 and 3, the first bending protective layer 20 of flexible display apparatus 100 is in flexible substrate 10
Upright projection of upright projection covering the second bending protective layer 30 in flexible substrate 10.I.e. first bending protective layer 20 covers soft
Property substrate 10 area be greater than second bending protective layer 30 cover flexible substrate 10 area, such as second bending protective layer 30 can
To be only coated in bent area 13, to save raw material under the premise of playing a protective role to bent area 13, Flexible Displays are reduced
The cost of device 100.Simultaneously as the first bending protective layer 20 being arranged in flexible substrate 10 can reduce curved before bending
Difficulty being rolled over, reducing folding s tress suffered when flexible substrate 10 is bent, each position answers when to prevent flexible substrate 10 from bending
Power mutation can set the area at least more than 10 bent area 13 of flexible substrate for the area of the first bending protective layer 20；And
After bending, the flexible substrate 10 of bent area 13 and the first bending protective layer 20 have biggish strain, and 11 He of the first flat region
There is lesser strain or zero strain therefore can only answer for the flexible substrate 10 of second flat region 12 and the first bending protective layer 20
Become biggish the second bending of bent area setting protective layer 30, to prevent the flexible substrate 10 and the first bending protective layer of bent area 13
20 ess-strain further increases, and provides protective effect to flexible substrate 10.
Optionally, with continued reference to Fig. 2 and Fig. 3, the first bending protective layer 20 and the second bending protective layer 30 are planar
Structure prevents flexible substrate 10 to be broken so as to greatest extent be that bent area 13 provides protective effect.
Optionally, Fig. 4 is a kind of overlooking structure diagram of flexible display apparatus provided in an embodiment of the present invention.Such as Fig. 4,
The first bending protective layer 20 of flexible display apparatus 100 is planar structure in the present embodiment, to reduce bent area 13 in bending
Stress, reduce bending difficulty；And the second bending protective layer 30 is strip structure, i.e., the second bending protective layer 30 includes at least one
Height bends ceiling 31, so as to save raw material under the premise of providing protective effect for bent area 13, reduces flexible aobvious
The cost of showing device 100 simplifies preparation process.
Optionally, Fig. 5 is a kind of cross section structure schematic diagram of flexible display apparatus provided in an embodiment of the present invention.In conjunction with figure
4 and Fig. 5, the length L' of sub- bending ceiling 31 are more than or equal to the length L of the bending arc of bent area 13；Wherein, the length of arc is bent
Spend the product of the bending angle θ of crooked process radius R and bent area 13 that L is bent area 13.
Specifically, after flexible display apparatus 100 is bent, the son bending ceiling 31 of the second bending protective layer 30 of setting
Length L' is more than or equal to the length L of the bending arc of bent area 13, i.e., such as following formula:
L ' >=L=R × θ
Wherein, R is the crooked process radius of bent area 13, and θ is the bending angle of bent area 13.Such second bending protective layer 30
The power F of prevention 13 deformation of bent area of the son bending offer of ceiling 31, at least has on the direction that bending region 13 is bent and divides
Fx is measured, so as to save raw material under the premise of providing certain protective role for bent area 13, reduces flexible display apparatus
100 cost.
Optionally, Fig. 6 is the structural schematic diagram of another flexible display apparatus provided in an embodiment of the present invention.It is soft such as Fig. 6
Property display device 100 the first bending protective layer 20 be located at the flexible substrate 10 of bent area 13 towards flexible display apparatus 100
The side of display surface 110；Second bending protective layer 30 is located at the flexible substrate 10 of bent area 13 away from flexible display apparatus 100
The side of display surface 110.
Specifically, the first bending protective layer 20 that flexible substrate 10 is arranged before bending is located at flexible substrate 10 and shows towards flexibility
The side of 100 display surface 110 of showing device, and the second bending protective layer 30 that flexible substrate 10 is arranged after bending is located at flexible substrate
10 away from the side of the first bending protective layer 20.First bending protective layer 20 can reduce bending difficulty, in bending to bending
Area 13 provides protective effect.After flexible substrate 10 is bent, the first bending protective layer 20 keeps tensional state, can pushing away with the time
It moves and creep occurs, the neutral surface of the first bending protective layer 20 is mobile towards the direction of flexible substrate 10, and the first bending is caused to protect
Sheath 20 reduces the protective effect of bent area 13.After the bending of flexible substrate 10, by curved away from first in flexible substrate 10
Side setting the second bending protective layer 30 of protective layer 20 is rolled over, which answers with lesser strain or zero
Become, a tensile stress can be provided to bent area 13, when the neutral surface of the first bending protective layer 30 is moved down to prevent the first bending
The neutral surface of protective layer 20 moves down, and further provides protective effect to bent area 13.
Optionally, with continued reference to Fig. 6, the side of flexible substrate 10 first flat region 11 towards the second flat region 12 is provided with
First support plate 71；The side of second flat region 12 towards the first flat region 11 is provided with the second support plate 72；First support plate
71 and second are provided with adhesive layer 60 between support plate 72；Second bending protective layer 30 is located at the support of the first support plate 71, second
Plate 72 and adhesive layer 60 close in the gap between the side of bent area 13 and bent area 13.
Specifically, the first support plate 71 and second of the first flat region 11 of flexible substrate 10 and the setting of the second flat region 12
Support plate 72 can provide a supporting role for flexible substrate 10, prevent the flat region bending deformation of flexible substrate 10, influence to show.
The adhesive layer 60 being arranged between first support plate 71 and the second support plate 72, on the one hand can play the role of it is certain padded, with
The crooked process radius for increasing bent area 13, prevents bent area 13 because crooked process radius is smaller, and causes to be broken, and is on the other hand capable of fixing
The position of first support plate 71 and the second support plate 72, so that flexible substrate 10 keeps bending state.After bending, by by second
Gap between first support plate 71 of the bending filling of protective layer 30, the second support plate 72 and adhesive layer 60 and bent area 13, energy
It is enough to provide a tensile stress to bent area 13 when creep, which occurs, for the first bending protective layer 30 causes its neutral surface to move down, to prevent
The neutral surface of first bending protective layer 20 moves down, and further provides protective effect to bent area 13；Meanwhile first support plate 71,
After gap between second support plate 72 and adhesive layer 60 and bent area 13 is filled, support can be played to bent area 13 and is made
With preventing foreign impacts from causing bent area 13, deformation occurs.
Wherein, the second bending protective layer 30 can be deep into flexible substrate 10 deviates from display surface 110 one by acicular texture
Side, by bending the fluent material, such as colloidal material, fluent material etc. of protective layer 30 by second, with the side sprayed or injected
Formula fills the gap between the first support plate 71, the second support plate 72 and adhesive layer 60 and bent area 13, and is formed by curing the
Two bending protective layers 30.In addition, it is optional, between the first support plate 71 and the second support plate 72 of flexible display apparatus 100 also
Active ergosphere (not shown) can be set, which for example can be the functional layer of antistatic and/or heat spreading function.
The embodiment of the invention also provides a kind of preparation method of flexible display apparatus, the preparation sides of the flexible display apparatus
Method can be adapted for preparing flexible display apparatus provided in an embodiment of the present invention.Fig. 7 is that one kind provided in an embodiment of the present invention is soft
The flow chart of the preparation method of property display device.As the preparation method of Fig. 7, the flexible display apparatus of the present embodiment include:
S710, a flexible substrate is provided；The flexible substrate includes the first flat region, bent area and the second flat region；Institute
It states bent area and connects first flat region and second flat region.
Specifically, flexible substrate 10 is the basis of the flexible modification of flexible display apparatus 100 with reference to Fig. 1.The flexible substrate
10 have the first flat region 11, the second flat region 12 and bent area 13, can be by the first flat region 11 of flexible substrate 10
It may be provided with multiple pixel units of flexible aobvious device 100, with the second flat region 12 to realize flexible display apparatus after bending
Double-sided display or curved-surface display；Alternatively, the first flat region 11 of flexible substrate 10 may be provided with the more of flexible display apparatus 100
A pixel unit, and the second flat region 12 can be used for the integrated chip of bonding flexible display apparatus 100, circuit board etc., curved
The narrow frame of flexible display apparatus 100 is realized after folding.
S720, at least the bent area formed first bending protective layer.
Specifically, continuing to refer to figure 1, the hard film layers such as metal wiring set by the bent area 13 of flexible substrate 100, cause
Increase the bending difficulty of flexible substrate 10.There can be certain elastic strain energy by being formed in the bent area of flexible substrate 10 13
First bending protective layer 20 of power is reduced curved suffered by bent area 13 with can reduce bending difficulty when bent area 13 is bent
Folding stress shields to the bent area 13 of flexible substrate 10 with preventing flexible substrate 10 from cracking.Wherein it is possible to
Ultraviolet cured adhesive layer is formed by the cured mode of ultraviolet light, to bend protective layer 20 as first.
S730, second flat region is bent to first flat region by the bent area away from described flexible aobvious
The side of the display surface of showing device is oppositely arranged first flat region with second flat region.
Specifically, continuing to refer to figure 1, after bent area 13 forms the first bending protective layer 20, the second flat region 11 is led to
The bending of bent area 13 is crossed to the first flat region 11 away from the side of the display surface 110 of flexible display apparatus 100, so that first is straight
Area 11 is oppositely arranged with the second flat region 12.If the second flat region 12 is the non-display area of flexible display apparatus 100, by soft
Property substrate 10 bending can be achieved flexible display apparatus 100 narrow frame；If the first flat region 11 and the second flat region 12
It is shown, then the curved surface or double-sided display effect of flexible display apparatus 100 can be achieved by the bending of flexible substrate 10.
S740, at least the bent area formed second bending protective layer；The elasticity modulus of the second bending protective layer
Greater than the elasticity modulus of the first bending protective layer.
Specifically, continuing to refer to figure 1, since after the bending of flexible display apparatus 100, the first bending holding of protective layer 20 is answered
Change state, thus creep can occur with the extension of time.Pass through the bending of flexible substrate 10 in flexible display apparatus 100
Afterwards, the second bending protective layer (not shown) at least is formed in the bent area of flexible substrate 10 13, the second bending protective layer
State with lesser strain or in zero strain will not occur creep with the extension of time, can prevent the first bending
The strain of protective layer 20 further increases, and then reduces stress suffered by the bent area 13 of flexible substrate 10, to be flexible substrate
10 bent area provides protective effect.In addition, the elasticity modulus of the second bending protective layer is greater than the bullet of the first bending protective layer 20
Property modulus, i.e., second bending protective layer flexible deformation difficulty be greater than first bending protective layer 20, so first bending protect
When 20 creep of sheath, the second bending protective layer can prevent the first bending protective layer 20 from continuing deformation, so as to prevent because of the
One bending 20 deformation of protective layer, causes the bent area 13 of flexible substrate 10 cracked, influences the display effect of flexible display apparatus
The phenomenon that fruit, generates.Wherein, the second bending protective layer can be formed by way of ultraviolet light solidification or heat cure.
The present embodiment forms the first bending protective layer by the bent area before flexible substrate is bent, and it is difficult to can reduce bending
Degree, and the bent area after flexible substrate bending forms the second bending protective layer, to provide the bent area in bending state
Protective effect improves the display effect of flexible display apparatus.
Optionally, the position of the first bending protective layer of bent area and the second bending protective layer can be the first bending protection
Layer be formed in flexible substrate towards flexible display apparatus display surface side, second bending protective layer is formed in the first bending guarantor
Sheath deviates from the side of flexible substrate.Fig. 8 is the preparation method of another flexible display apparatus provided in an embodiment of the present invention
Flow chart.As the preparation method of Fig. 8, the flexible display apparatus of the present embodiment include:
S910, a flexible substrate is provided；The flexible substrate includes the first flat region, bent area and the second flat region；Institute
It states bent area and connects first flat region and second flat region；
S920, it is formed in the side of the flexible substrate towards the display surface of the flexible display apparatus of the bent area
The first bending protective layer.
Specifically, such as Fig. 9, since the flexible substrate 10 of flexible display apparatus 100 is generally directed toward flexible display apparatus 100
The back side (side of display surface 110 in flexible display apparatus 100) bending, to realize the narrow frame of flexible display apparatus 100
Or curved-surface display, therefore be located at flexible display apparatus 100 in 110 side of display surface bent area 13 suffered by tensile stress compared with
Greatly.By forming the first bending protective layer 20 towards the side of 100 display surface 110 of flexible display apparatus in flexible substrate 10, and
The first bending protective layer 20 at least covers the bent area 13 of flexible substrate 10, to reduce flexible when flexible substrate 10 is bent
The bending difficulty of substrate 10 reduces folding s tress suffered when flexible substrate 10 is bent, and prevents flexible substrate 10 when bending from generating
Crackle etc. shields to the bent area 13 of flexible substrate 10.
S930, second flat region is bent to first flat region by the bent area away from described flexible aobvious
The side of the display surface of showing device is oppositely arranged first flat region with second flat region；
S940, the second bending protection is formed away from the side of the flexible substrate in the first bending protective layer
Layer.
Specifically, after flexible substrate 10 is bent, deviating from flexible substrate 10 in the first bending protective layer 20 with continued reference to Fig. 9
Side form the second bending protective layer 30, and the second bending protective layer 30 at least covers the bent area 13 of flexible substrate 10.
At this point, being formed by the second bending protective layer 30 has lesser strain or in zero strain state, the second bending protective layer
30 can further decrease stress suffered by the bent area 13 of flexible substrate 10, prevent flexible substrate 10 from cracking, to flexible liner
Bottom 10 shields.
Optionally, the cover board of flexible display apparatus is additionally provided in the side of the display surface of flexible display apparatus, the flexibility
The cover board of display device can have certain shock resistance, to provide flexible display apparatus certain protective effect.It should
Cover board can be formed before flexible substrate is bent or after bending, and the present embodiment is for forming the cover board of flexible display apparatus before bending
It is illustrated.Figure 10 is the structural schematic diagram of another flexible display apparatus provided in an embodiment of the present invention.Such as Figure 10, this implementation
The preparation method of flexible display apparatus of example includes:
S1110 provides a flexible substrate；The flexible substrate includes the first flat region, bent area and the second flat region；Institute
It states bent area and connects first flat region and second flat region；
S1120, the bent area the flexible substrate towards the flexible display apparatus display surface side shape
At the first bending protective layer；
S1130, a cover board is provided；
S1140, the cover board is fitted in the flexible substrate towards the flexible display apparatus display surface side；
S1150, second flat region is bent to first flat region by the bent area away from the flexibility
The side of the display surface of display device is oppositely arranged first flat region with second flat region；
S1160, the second bending protection is formed away from the side of the flexible substrate in the first bending protective layer
Layer, and the second bending protective layer described in the gap filling between the bent area and the cover board.
Specifically, forming the first bending in the bent area 13 of 100 display surface of flexible display apparatus, 110 side with reference to Figure 11
After protective layer 20, cover board 40, the cover board 40 are bonded towards 110 side of display surface of flexible display apparatus 100 in flexible substrate 10
The device of display surface 110 in flexible display apparatus 100 can be prevented to be hit and damage, provide guarantor for flexible display apparatus 100
Shield effect.In addition, also being answered before flexible substrate 10 is bonded cover board 40 towards 110 side of display surface of flexible display apparatus 100
Functional layer 50 is formed towards 110 side of display surface of flexible display apparatus 100 in flexible substrate 10, which can be inclined
Light functional layer, touch function layer etc..
After the bending of flexible display apparatus 100, there is gap 41, the second bending protection between cover board 40 and flexible substrate 10
Layer 30 is formed in the bent area 13 of flexible substrate 10, and fills the gap 41 between cover board 40 and bent area 13, so as to
Protective effect is provided to flexible substrate 10, and is provided a supporting role for the bent area of flexible substrate 10, fixed flexible substrate 10,
Enhance the mechanical performance of flexible substrate 10.
Optionally, the position of the first bending protective layer of bent area and the second bending protective layer can be the first bending protection
Layer be formed in flexible substrate towards flexible display apparatus display surface side, second bending protective layer is formed in flexible substrate back
The side of display surface from flexible display apparatus.Figure 12 is the preparation of another flexible display apparatus provided in an embodiment of the present invention
The flow chart of method.As the preparation method of Figure 12, the flexible display apparatus of the present embodiment include:
S1310, a flexible substrate is provided；The flexible substrate includes the first flat region, bent area and the second flat region；Institute
It states bent area and connects first flat region and second flat region；
S1320, the bent area the flexible substrate towards the flexible display apparatus display surface side shape
At the first bending protective layer；
S1330, second flat region is bent to first flat region by the bent area away from the flexibility
The side of the display surface of display device is oppositely arranged first flat region with second flat region；
S1340, the flexible substrate in the bent area deviate from the side shape of the display surface of the flexible display apparatus
At the second bending protective layer.
Specifically, the second flat region 12 is being bent to the first flat region 11 by bent area 13 away from flexibility with reference to Fig. 1
The showing towards flexible display apparatus 100 of flexible substrate 10 before the side of the display surface 110 of display device 100, in bent area 13
Show that the side in face 110 forms the first bending protective layer 20, to reduce the bending difficulty of flexible substrate in bending.By second
Flat region 12 is bent to the first flat region 11 behind the side of the display surface 110 of flexible display apparatus 100 by bent area 13,
Flexible substrate 10 in bent area 13 forms the second bending protective layer away from the side of the display surface 110 of flexible display apparatus 100.
The second bending protective layer is capable of providing a tensile stress, to prevent the neutral surface of the first bending protective layer 20 from protecting towards the first bending
The direction that sheath 20 is directed toward flexible substrate 10 is mobile, further provides protective effect to bent area 13.
Optionally, since flexible substrate has the characteristics that flexible modification, for make flexible substrate the first flat region and
Second flat region keep flat state, therefore at least bent area formed first bending protective layer before, need to be in flexible substrate
The first flat region and the second flat region corresponding support plate is set.Figure 13 is provided in an embodiment of the present invention also a kind of flexible aobvious
The flow chart of the preparation method of showing device.As the preparation method of Figure 13, the flexible display apparatus of the present embodiment include:
S1510, a flexible substrate is provided；The flexible substrate includes the first flat region, bent area and the second flat region；Institute
It states bent area and connects first flat region and second flat region；
S1520, deviate from the one of the display surface of the flexible display apparatus in first flat region of the flexible substrate
Side is bonded the first support plate, and deviates from the display of the flexible display apparatus in second flat region of the flexible substrate
The side in face is bonded the second support plate.
Specifically, being respectively formed with first in the first flat region 11 of flexible substrate 10 and the second flat region 12 such as Figure 14
Support plate 71 and the second support plate 72.First support plate 71 and the second support plate 72 are both formed in flexible substrate 10 away from flexibility
The side of the display surface 110 of display device 100, to guarantee that the first support plate 71 and second is being arranged in flexible display apparatus 100
Fagging 72 still is able to normally show.Wherein, the first support plate 71 and the second support plate 72 can be formed simultaneously, to reduce preparation work
Skill reduces cost.
S1530, adhesive layer is formed in first support plate；Second flat region is curved by the bent area
For song to first flat region behind the side of the display surface of the flexible display apparatus, the adhesive layer is located at described first
Between support plate and second support plate；
Specifically, such as Figure 15, formed the first support plate 71 and with after the second support plate 72, the shape in the first support plate 71
At adhesive layer 60.Such as Figure 17, which is carrying on the back the second flat region 12 by the bending of bent area 13 to the first flat region 11
Behind the side of display surface 110 from flexible display apparatus 100, between the first support plate 71 and the second support plate 72.Bonding
Layer 60 has the function of padded, is capable of increasing the crooked process radius of bent area 13, prevents bent area 13 because crooked process radius is smaller, and makes
At fracture.Meanwhile adhesive layer 60 is capable of fixing the position of the first support plate 71 and the second support plate 72, so that flexible substrate 10 is protected
Hold bending state.
S1540, the bent area the flexible substrate towards the flexible display apparatus display surface side shape
At the first bending protective layer；
S1550, second flat region is bent to first flat region by the bent area away from the flexibility
The side of the display surface of display device is oppositely arranged first flat region with second flat region；
S1560, the one of the bent area is closed in first support plate, second support plate and the adhesive layer
Second bending protective layer described in gap filling between side and the bent area.
Specifically, the second flat region 12 is being bent to the first flat region 11 by bent area 13 away from flexibility such as Figure 16
Before the side of the display surface 110 of display device 100, the first bending protective layer 20 is formed, to reduce bending difficulty and reduce bending
When bent area 13 suffered by stress.Such as Figure 17, carried on the back being bent the second flat region 12 by bent area 13 to the first flat region 11
Behind the side of display surface 110 from flexible display apparatus 100, the first support plate 71, the second support plate 72 and adhesive layer 60 with
There is gap 61 between bent area.Such as Figure 18, protective layer 30 is bent by filling second in gap 61, to mention to bent area 13
Protective effect further is provided to bent area 13 for tensile stress to prevent the neutral surface of the first bending protective layer 20 from moving down；Together
When, it, can be right after the gap between the first support plate 71, the second support plate 72 and adhesive layer 60 and bent area 13 is filled
Bent area 13 plays a supportive role, and preventing foreign impacts from causing bent area 13, deformation occurs.
Optionally, continuing with reference Figure 17 and Figure 18, the first support, the 71, second support plate 72 and adhesive layer 60 with
The mode of the second bending of filling protective layer 30 for example can be to be deep by acicular texture in gap 61 between bent area 13
First support plate 71, the second support plate 72 and adhesive layer 60 close on the gap between the side and bent area 13 of institute bent area 13
61, the fluent material of injection the second bending protective layer 30；By the fluent material solidification of the second bending protective layer 30 of injection, formed
Second bending protective layer 30.Wherein, the second bending protective layer 30 for example may include heat cure glue-line.Illustratively, pass through by
Heat-curable glue injects gap 61, then is solidified by way of heating, to form the second bending protective layer 30.
The embodiment of the present invention is bent by bent area setting the first bending protective layer of the flexible substrate before bending with reducing
Difficulty reduces folding s tress；Bent area setting the second bending protective layer of flexible substrate, can prevent the first bending after bending
The creep occurred after protective layer bending, to prevent from matching because of the first bending protective agent to what is be arranged in flexible substrate and flexible substrate
Line layer protective capability reduces, and causing the wiring being arranged in flexible substrate and flexible substrate, there is a phenomenon where crackles, and then improve soft
The display effect of property display device.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (16)
1. a kind of flexible display apparatus characterized by comprising
Flexible substrate；The flexible substrate includes the first flat region, bent area and the second flat region；First flat region and institute
The second flat region is stated to be oppositely arranged；The bent area connects first flat region and second flat region；
It is located at least in the first bending protective layer of the bent area；
It is located at least in the second bending protective layer of the bent area；
The elasticity modulus of the second bending protective layer is greater than the elasticity modulus of the first bending protective layer.
2. flexible display apparatus according to claim 1, which is characterized in that the first bending protective layer is located at described soft
Property substrate towards the flexible display apparatus display surface side；The second bending protective layer, which is located at first bending, to be protected
Sheath deviates from the side of the flexible substrate.
3. flexible display apparatus according to claim 2, which is characterized in that the flexible display apparatus further includes cover board；
The cover board be located at the flexible substrate towards the flexible display apparatus display surface side；The bent area and the lid
Gap setting between plate has the second bending protective layer.
4. flexible display apparatus according to claim 1, which is characterized in that the first bending protective layer is located at described curved
The flexible substrate of folding area towards the flexible display apparatus display surface side；The second bending protective layer is located at institute
The flexible substrate of bent area is stated away from the side of the display surface of the flexible display apparatus.
5. flexible display apparatus according to claim 4, which is characterized in that first flat region is flat towards described second
The side in straight area is provided with the first support plate；The side of second flat region towards first flat region is provided with second
Fagging；Adhesive layer is provided between first support plate and second support plate；
The second bending protective layer is located at described in first support plate, second support plate and the adhesive layer close on
In gap between the side of bent area and the bent area.
6. flexible display apparatus according to claim 1, which is characterized in that the first bending protective layer is in the flexibility
Upright projection on substrate covers upright projection of the second bending protective layer in the flexible substrate.
7. flexible display apparatus according to claim 1, which is characterized in that the first bending protective layer and described the
Two bending protective layers are planar structure.
8. flexible display apparatus according to claim 1, which is characterized in that the first bending protective layer is planar knot
Structure；The second bending protective layer includes at least one sub- bending ceiling.
9. flexible display apparatus according to claim 8, which is characterized in that the length of the sub- bending ceiling be greater than etc.
In the length of the bending arc of the bent area；
Wherein, the length of the bending arc is the product of the crooked process radius R of the bent area and the bending angle θ of the bent area.
10. flexible display apparatus according to claim 1, which is characterized in that the first bending protective layer includes ultraviolet
Photocuring glue-line；The second bending protective layer includes ultraviolet cured adhesive layer or heat cure glue-line.
11. a kind of preparation method of flexible display apparatus characterized by comprising
One flexible substrate is provided；The flexible substrate includes the first flat region, bent area and the second flat region；The bent area connects
Connect first flat region and second flat region；
At least the first bending protective layer is formed in the bent area；
Second flat region is bent to first flat region by the bent area away from the flexible display apparatus
The side of display surface is oppositely arranged first flat region with second flat region；
At least the second bending protective layer is formed in the bent area；
The elasticity modulus of the second bending protective layer is greater than the elasticity modulus of the first bending protective layer.
12. the preparation method of flexible display apparatus according to claim 11, which is characterized in that
At least the first bending protective layer is formed in the bent area, comprising:
Described first is formed in the side of the flexible substrate towards the display surface of the flexible display apparatus of the bent area
Bend protective layer；
At least the second bending protective layer is formed in the bent area, comprising:
The second bending protective layer is formed away from the side of the flexible substrate in the first bending protective layer.
13. the preparation method of flexible display apparatus according to claim 12, which is characterized in that at least in the bending
Area is formed before the second bending protective layer, further includes:
One cover board is provided；
By the cover board fit in the flexible substrate towards the flexible display apparatus display surface side；
At least the second bending protective layer is formed in the bent area, further includes:
Second bending protective layer described in gap filling between the bent area and the cover board.
14. the preparation method of flexible display apparatus according to claim 11, which is characterized in that
At least the first bending protective layer is formed in the bent area, comprising:
Described first is formed in the side of the flexible substrate towards the display surface of the flexible display apparatus of the bent area
Bend protective layer；
At least the second bending protective layer is formed in the bent area, comprising:
The flexible substrate in the bent area forms described second away from the side of the display surface of the flexible display apparatus
Bend protective layer.
15. the preparation method of flexible display apparatus according to claim 14, which is characterized in that at least in the bending
Area is formed before the first bending protective layer, further includes:
In first flat region of the flexible substrate away from the side of the display surface of flexible display apparatus fitting first
Support plate；
In second flat region of the flexible substrate away from the side of the display surface of flexible display apparatus fitting second
Support plate；
And adhesive layer is formed in first support plate；Second flat region is being bent by the bent area to institute
The first flat region is stated behind the side of the display surface of the flexible display apparatus, the adhesive layer is located at first support plate
Between second support plate；
At least the second bending protective layer is formed in the bent area, comprising:
First support plate, second support plate and the adhesive layer close on the side of the bent area with it is described curved
Second bending protective layer described in gap filling between folding area.
16. the preparation method of flexible display apparatus according to claim 15, which is characterized in that in the gap filling institute
The second bending protective layer is stated, including
First support plate, second support plate and the adhesive layer, which are deep into, by acicular texture closes on the bending
The fluent material of the second bending protective layer is sprayed in gap between the side in area and the bent area；
By the fluent material solidification of the second bending protective layer of injection, the second bending protective layer is formed.
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