CN109949702B - Flexible display device and manufacturing method thereof - Google Patents
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- CN109949702B CN109949702B CN201910226713.2A CN201910226713A CN109949702B CN 109949702 B CN109949702 B CN 109949702B CN 201910226713 A CN201910226713 A CN 201910226713A CN 109949702 B CN109949702 B CN 109949702B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 89
- 238000005452 bending Methods 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000003287 optical effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 229920006280 packaging film Polymers 0.000 description 6
- 239000012785 packaging film Substances 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005538 encapsulation Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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Abstract
The invention discloses a flexible display device and a manufacturing method thereof, and relates to the technical field of display. The main technical scheme of the invention is as follows: comprising the following steps: the flexible display panel is fixedly attached to the pre-tightening substrate, the pre-tightening substrate comprises a first end and a second end which are opposite to each other, and the pre-tightening substrate is used for applying pre-tightening force inwards along the first end and the second end to the flexible display panel. The invention is mainly used for manufacturing the flexible display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display device and a manufacturing method thereof.
Background
Flexible display devices have the ability to flex, which greatly improves the designability of future display products, and a large number of statically flexed products have emerged at the present time. However. The flexible display device capable of being dynamically bent cannot be produced in mass, and the reason is that in the bending process of the flexible display device, each film layer in the flexible display panel is easy to crack under the tensile stress state, so that the flexible display panel is damaged and fails, and then the flexible display device cannot be used. Therefore, how to improve the tensile strength of the flexible display device is a technical problem that needs to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, an embodiment of the present invention provides a flexible display device and a method for manufacturing the same, which are mainly aimed at improving the bending resistance of the flexible display device.
In one aspect, embodiments of the present invention provide a flexible display device including: the flexible display panel is fixedly attached to the pre-tightening substrate, the pre-tightening substrate comprises a first end and a second end which are opposite to each other, and the pre-tightening substrate is used for applying pre-tightening force inwards along the first end and the second end to the flexible display panel.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Specifically, the pre-tightening substrate includes an elastic film adhered to the outer side of the flexible display panel.
Specifically, the elastic film comprises a first sub-elastic layer and a second sub-elastic layer, the flexible display panel comprises a first face and a second face which are opposite, the first elastic layer is adhered to the first face of the flexible display panel, and the second sub-elastic layer is adhered to the second face of the flexible display panel.
Specifically, the pretightening force comprises a first pretightening force and a second pretightening force, the first pretightening force is applied to the flexible display panel by the first sub-elastic layer, the second pretightening force is applied to the flexible display panel by the second sub-elastic layer, and the first pretightening force is equal to the second pretightening force.
Specifically, the flexible display panel comprises a back plate, a light-emitting layer and a packaging film which are sequentially stacked, wherein the first sub-elastic layer is arranged on one side, away from the light-emitting layer, of the back plate, and the second sub-elastic layer is arranged on one side, away from the light-emitting layer, of the packaging film.
Specifically, the device also comprises a complete machine base which is used as the pre-tightening substrate, wherein the complete machine base is provided with an adhesive surface, and the flexible display panel is adhered to the adhesive surface of the complete machine base.
On the other hand, the embodiment of the invention also provides a manufacturing method of the flexible display device, which comprises the following steps: and fixedly bonding the flexible display panel on the pre-tightening substrate, so that the pre-tightening substrate applies pre-tightening force inwards along the first end and the second end of the pre-tightening substrate to the flexible display panel.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Specifically, the fixing and adhering the flexible display panel to the pre-tightening substrate includes:
stretching the pre-tensioned substrate along the first end and the second end;
the flexible display panel is bonded to the pre-tensioned substrate in a stretched state.
Specifically, the pre-tightening substrate comprises an elastic film, the elastic film comprises a first sub-elastic layer and a second sub-elastic layer, the flexible display panel comprises a first surface and a second surface which are opposite,
stretching the pre-tensioned substrate along the first end and the second end comprises:
stretching the first sub-elastic layer along the first end and the second end;
stretching the second sub-elastic layer along the first and second ends;
the bonding of the flexible display panel to the pre-tensioned substrate in a tensioned state includes:
bonding the first sub-elastic layer in a stretched state to the first face;
the second sub-elastic layer in a stretched state is bonded to the second face.
Specifically, the fixing and adhering the flexible display panel to the pre-tightening substrate includes:
bending the pre-tightening substrate to form a preset angle;
bonding the flexible display panel to a preset surface of the pre-tightening substrate, wherein the preset surface is a convex surface when the pre-tightening substrate is bent;
flattening the bonded flexible display panel and the pre-tightening substrate to enable the pre-tightening substrate to apply pre-tightening force to the flexible display panel.
According to the flexible display device and the manufacturing method thereof, the pretightening substrate is arranged on the flexible display substrate, so that pretightening force can be applied to the flexible display panel, the pretightening force is generated in pairs, the direction of the pretightening force is inward from the first end and the second end of the pretightening substrate (namely, the two ends of the pretightening substrate point to the center of the pretightening substrate), when the flexible display device is bent, the flexible display device is under stretching force, meanwhile, the pretightening force applied by the pretightening substrate is also applied, and the direction of the pretightening force is opposite to the direction of the stretching force, so that the tensile stress applied to the flexible display panel in bending can be reduced, and further the deformation applied to the flexible display panel in the bending process can be reduced, and therefore, the bending resistance of the flexible display device is improved.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another structure of a flexible display device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
FIG. 4 is a flowchart of a method for manufacturing a flexible display device according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method for manufacturing a flexible display device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of another structure of a flexible display device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of another structure of a flexible display device according to an embodiment of the present invention;
FIG. 10 is a schematic diagram of a flexible display device according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of another structure of a flexible display device according to an embodiment of the present invention;
fig. 12 is a schematic view of another structure of a flexible display device according to an embodiment of the present invention;
FIG. 13 is a schematic view of a flexible display device according to an embodiment of the present invention;
fig. 14 is a schematic view of another structure of a flexible display device according to an embodiment of the present invention.
Reference numerals illustrate:
the flexible display panel comprises a 1-flexible display panel, a 11-backboard, a 12-luminous layer, a 13-packaging film, a 14-second deformation area, a 15-second non-deformation area, a 2-pre-tightening substrate, a 211-second sub-elastic layer, a 212-first sub-elastic layer, a 22-whole machine base, a 221-first deformation area, a 222-first non-deformation area, a 223-bonding surface, a 3-chuck and a 4-arc-shaped manufacturing tool.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of a flexible display device and a manufacturing method thereof according to the invention with reference to the accompanying drawings and preferred embodiments.
In one aspect, an embodiment of the present invention provides a flexible display device, as shown in fig. 1, including: the flexible display panel 1 and pretension base plate 2, the flexible display panel 1 is fixed to be laminated on pretension base plate 2, pretension base plate 2 includes relative first end and second end, pretension base plate 2 is used for exerting along first end and the inward pretension of second end to flexible display panel 1. The direction indicated by the arrow A is the direction of the pretightening force. The flexible display panel 1 is provided with a pre-tightening substrate 2, pre-tightening force is applied to the flexible display panel 1 through the pre-tightening substrate 2, the pre-tightening force is generated in pairs, the pre-tightening force is directed to the center of the pre-tightening substrate 2 from a first end, the pre-tightening force is directed to the center of the pre-tightening substrate 2 from a second end, the flexible display panel 1 is always in a pressed state due to the pre-tightening force, when the flexible display device is bent, the flexible display panel 1 is subjected to pulling force so that the flexible display panel 1 is stretched, and when the flexible display panel 1 is in a stretched state, the flexible display panel 1 is provided with a deformation area and a non-deformation area, wherein the non-deformation area is positioned at two ends of the deformation area, namely, the non-deformation area is provided with two sub-areas, the positions of which are consistent with the positions of the first end and the second end, so that the flexible display panel 1 is directed to the non-deformation area from the center of the flexible display panel 1, the pulling force is also generated in pairs, when the flexible display panel 1 is bent, the pulling force is opposite to the direction of the pre-tightening force, and when the flexible display panel 1 is bent, the flexible display panel 1 is subjected to the bending force is further reduced, and the total deformation force is generated under the flexible display panel 1. Meanwhile, since the flexible display panel 1 is in a pressed state for a long time, when the flexible display panel 1 is bent, the flexible display panel 1 is also subjected to compressive stress, cracks are difficult to initiate in the state of the compressive stress, and the tip stress field of the existing cracks can be reduced, so that the cracks have a closing trend, the flexible display panel 1 is further protected, and the bending capacity of the flexible display device is further improved.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Specifically, the pre-tightening substrate 2 includes an elastic film that is adhered to the outside of the flexible display panel 1. The pre-tightening substrate 2 may be an elastic film, where the elastic film is adhered to the outer side of the flexible display panel 1, the flexible display panel 1 is in a plate shape, and the outer sides of the flexible display panel 1 refer to two sides with largest areas, the elastic film is in a stretched state, and the elastic film has a rebound tendency under the condition that no external force exists, so that the pre-tightening force inward from the first end and the second end can be applied to the flexible display panel 1. The elastic film may be provided only on one side of the flexible display panel 1, or may be provided on both sides of the flexible display panel 1.
Specifically, as shown in fig. 2, the elastic film includes a first sub-elastic layer 212 and a second sub-elastic layer 211, the flexible display panel 1 includes opposite first and second faces, the first sub-elastic layer 212 is adhered to the first face of the flexible display panel 1, and the second sub-elastic layer 212 is adhered to the second face of the flexible display panel 1. The elastic films are adhered to two sides of the flexible display panel 1, the elastic films comprise a first sub-elastic layer 212 and a second sub-elastic layer 211, the flexible display panel 1 comprises a first surface and a second surface which are opposite, one surface is a light emitting side, the other surface is a backlight side, the second sub-elastic layer 211 applies pretightening force to the flexible display panel 1 on the second surface, the first sub-elastic layer 212 applies pretightening force to the flexible display panel 1 on the first surface, and the pretightening force applied to the flexible display panel 1 is the resultant force of the forces applied to the flexible display panel 1 by the first sub-elastic layer 212 and the second sub-elastic layer 211. If a pretightening force is applied to the flexible display panel 1 only at one side thereof, the flexible display panel 1 may warp in a natural state, making it inconvenient for the flexible display panel 1 to be attached to other parts of the flexible display device. By arranging the elastic films on both sides of the flexible display panel 1, the warping angle of the flexible display panel 1 can be reduced, and the flexible display device is convenient to manufacture.
Specifically, the pretightening force includes a first pretightening force and a second pretightening force, the first pretightening force is applied to the flexible display panel 1 by the first sub-elastic layer 212, the second pretightening force is applied to the flexible display panel 1 by the second sub-elastic layer 211, and the first pretightening force is equal to the second pretightening force. The second sub-elastic layer 211 can apply a first pre-tightening force to the flexible display panel 1, and the first sub-elastic layer 212 can apply a second pre-tightening force to the flexible display panel 1, wherein the direction of the first pre-tightening force is inward along the first end and the second end, and the direction of the second pre-tightening force is also inward from the first end and the second end, and both the second sub-elastic layer 211 and the first sub-elastic layer 212 are in a stretched state. When the first pretightening force and the second pretightening force are the same in size, the flexible display panel 1 can be further guaranteed not to warp in a natural state. In order to ensure that the first pretightening force and the second pretightening force are the same, the second sub-elastic layer 211 and the first sub-elastic layer 212 can be made of the same material, and the elastic modulus of the second sub-elastic layer and the first sub-elastic layer are the same, so that the first pretightening force and the second pretightening force are easy to control, and the first pretightening force and the second pretightening force are easy to make the same. When the materials of the second sub-elastic layer 211 and the first sub-elastic layer 212 are different, the first pre-tightening force and the second pre-tightening force can be adjusted by adjusting the thickness and the stretching degree of the second sub-elastic layer 211 and the first sub-elastic layer 212.
Specifically, as shown in fig. 2, the flexible display panel 1 includes a back plate 11, a light emitting layer 12, and an encapsulation film 13 sequentially stacked, a first sub-elastic layer 212 is disposed on a side of the back plate 11 facing away from the light emitting layer 12, and a second sub-elastic layer 211 is disposed on a side of the encapsulation film 13 facing away from the light emitting layer 12. The flexible display panel 1 specifically includes the back plate 11, the light emitting layer 12 and the packaging film 13, where the second sub-elastic layer 211 is adhered to the packaging film 13, that is, the second sub-elastic layer 211 is disposed on the light emitting side, so that the first sub-elastic layer 211 is required to be made of a colorless transparent material, and meanwhile, the second sub-elastic layer 211 has high permeability and no phase difference, or the phase difference is very small, the second sub-elastic layer 211 may be made of an optical material cop, and the second sub-elastic layer 211 and the packaging film 13 are adhered by an optical adhesive psa. The first sub-elastic layer 212 is disposed on the backlight side of the flexible display panel 1, so that the light transmittance, color and material of the first sub-elastic layer 212 are not particularly required, and the first sub-elastic layer 212 can be made of polymer materials, metals and other materials.
Specifically, as shown in fig. 3, the display device further includes a complete machine base 22, the complete machine base 22 is used as the pre-tightening substrate 2, the complete machine base 22 has an adhesive surface 223, and the flexible display panel 1 is adhered to the adhesive surface 223 of the complete machine base 22. The optical adhesive is between the complete machine base 22 and the flexible display panel 1, the complete machine base 22 may be used as the pre-tightening substrate 2, the surface of the complete machine base 22 bonded with the flexible display panel 1 is the bonding surface 223, the complete machine base 22 may be all or part of the structure for supporting the flexible display panel 1, which may be referred to as the complete machine base 22, for supporting the flexible display panel 1, and may include a middle frame, a flexible display device housing, and other structures. The pretightening force is applied to the pretightening substrate 2 through the whole machine base 22, and the flexible display device can bear the tensile stress during bending and also bear the pretightening force from the whole machine when being bent, so that the tensile stress during bending of the display module is partially counteracted, the integral stress and strain of the flexible display panel 1 are reduced, the deformation of the flexible display panel 1 during bending is reduced, and the bending resistance of the flexible display panel 1 can be improved.
On the other hand, the embodiment of the invention also provides a manufacturing method of the flexible display device, which comprises the following steps: s1, fixedly adhering the flexible display panel 1 to the pre-tightening substrate 2. The pre-tightening substrate 2 is caused to apply a pre-tightening force inward along the first and second ends of the pre-tightening substrate 2 to the flexible display panel 1. The pretightening substrate 2 applies pretightening force to the flexible display panel 1, when the flexible display device is bent, the flexible display panel 1 can be subjected to stretching force, and meanwhile, pretightening force can be applied, the direction of the stretching force is opposite to that of the pretightening force, so that the pretightening force can offset a part of the stretching force, further, the total stress received by the flexible display panel 1 can be reduced, the deformation of the flexible display panel 1 can be reduced, and the flexible display panel 1 can not be damaged in a plurality of times of bending, and the bending capacity of the flexible display device is improved. Meanwhile, since the flexible display panel 1 is in a pressed state for a long time, when the flexible display panel 1 is bent, the flexible display panel 1 is also subjected to compressive stress, cracks are difficult to initiate in the state of the compressive stress, and the tip stress field of the existing cracks can be reduced, so that the cracks have a closing trend, the flexible display panel 1 is further protected, and the bending capacity of the flexible display device is further improved.
The aim and the technical problems of the invention can be further realized by adopting the following technical measures.
Specifically, fixedly attaching the flexible display panel 1 to the pre-tightening substrate 2 includes:
s11, stretching the pre-tightening substrate 2 along the first end and the second end; by stretching the pre-tension substrate 2 along the first end and the second end, the pre-tension substrate 2 is made to have a tensile deformation along the first end and the second end. Specifically, both ends of the pre-tightening substrate 2 may be tightened by the chucks 3, and then the pre-tightening substrate 2 is stretched. In this embodiment, the pre-tightening substrate 2 may be an elastic film.
S12, adhering the flexible display panel 1 to the pre-tightening substrate 2 in a stretched state. Specifically, when the chucks 3 are further fixed at the two ends of the pre-tightening substrate 2, the pre-tightening substrate 2 is bonded in the flexible display panel 1, that is, when the pre-tightening substrate 2 is still in a stretched state, the pre-tightening substrate 2 is bonded with the flexible display panel 1. After the flexible display panel 1 is adhered to the pre-tightening substrate 2, the chuck 3 is released, and the pre-tightening substrate 2 is retracted so that the whole flexible display panel 1 is pressed.
Specifically, as shown in fig. 2, the pre-tightening substrate 2 in this embodiment may be an elastic film, where the elastic film includes a first sub-elastic layer 212 and a second sub-elastic layer 211, and the flexible display panel 1 includes a first surface and a second surface opposite to each other, and when the display panel is specifically manufactured, the following steps should be included:
wherein step S11 stretching the pre-tensioned substrate 2 along the first end and the second end comprises:
s111, as shown in fig. 4, stretching the first sub-elastic layer 212 along the first end and the second end; the first sub-elastic layer 212 is stretched from the center to both sides in the same direction as the stretching direction of the pre-tightening substrate 2, and as shown in fig. 6, the first sub-elastic layer 212 is fixed by the chuck 3 so that the first sub-elastic layer 212 is in a stretched state.
S112, as shown in fig. 8, stretching the second sub-elastic layer 211 along the first end and the second end; the stretching manner and stretching direction of the second sub-elastic layer 211 are the same as those of the first sub-elastic layer 212, and detailed description thereof is omitted herein.
Step 12 of bonding the flexible display panel 1 to the pre-tensioned substrate 2 in a tensioned state specifically includes:
s121, as shown in fig. 7, bonding the first sub-elastic layer 212 in a stretched state to the first surface; after the first sub-elastic layer 212 is attached, the chuck 3 is released, the first sub-elastic layer 212 rebounds, and the first sub-elastic layer 212 retracts to apply a first pretightening force to the flexible display panel 1, so that the flexible display panel 1 is pressed as a whole. The first pretensioning forces occur in pairs, one pointing from the first end towards the centre of the pretensioning base plate 2 and the other pointing from the second end towards the centre of the pretensioning base plate 2. The first sub-elastic layer 212 and the flexible display panel 1 are adhered and fixed by optical cement.
S122, as shown in fig. 9, the second sub-elastic layer 211 in a stretched state is bonded to the second surface. The second sub-elastic layer 211 applies a second preset force to the flexible display panel 1, which also occurs in pairs.
The first preset force and the second preset force are preferably equal in magnitude, so that the flexible display panel 1 adhered with the second sub-elastic layer 211 and the first sub-elastic layer 212 cannot warp in a natural state, can be in a flat state, and further can facilitate adhesion of the flexible display panel 1 and other components. The flexible display panel 1 includes the encapsulation film 13, the light emitting layer 12 and the back plate 11, and when the flexible display device is manufactured, as shown in fig. 6 to 9, the first sub-elastic layer 212 may be stretched, then the back plate 11 is adhered to the first sub-elastic layer 212, then the light emitting layer 12, the back plate 11 and the second sub-elastic layer 211 in a stretched state are sequentially adhered, and after the second sub-elastic layer 211 is adhered and fixed, the clip 3 is released, so that the second sub-elastic layer 211 and the first sub-elastic layer 212 are in a natural state. The pretightening force applied to the flexible display panel 1 by the second sub-elastic layer 211 and the first sub-elastic layer 212, that is, the first pretightening force and the second pretightening force, can be adjusted by adjusting the stretching degree of the second sub-elastic layer 211 and the first sub-elastic layer 212. The order of bonding the second sub-elastic layer 211 and the first sub-elastic layer 212 may be changed.
Specifically, in addition to the stretching of the pre-tightening substrate 2 and then the stretching of the flexible display panel 1 provided in the above embodiment, the pre-tightening force may be applied to the flexible display panel 1, and the pre-tightening force may also be applied to the flexible display panel 1 by the following manner, specifically, as shown in fig. 5, the step S1 of fixedly adhering the flexible display panel 1 to the pre-tightening substrate 2 includes: s1.1, bending a pre-tightening substrate 2 to form a preset angle; at this time, the pre-tightening substrate 2 may be a complete machine base 22, as shown in fig. 10, the complete machine base 22 is bent to a preset angle, the complete machine base 22 includes a first deformation region 221 and a first non-deformation region 222, the first non-deformation region 222 is located at two sides of the first deformation region 221, and is located at two ends, i.e. a first end and a second end, of the complete machine base 22. Wherein the value range of the preset angle is more than 90 degrees and less than 180 degrees. The whole machine base 22 is provided with an adhesive surface 223, and the specific bending process is that, as shown in fig. 14, a first end and a second end of the whole machine base 22 are fixed by a gripper, a compression force pointing to the center of the whole machine base 22 is applied to the whole machine base 22 by a chuck 3, then the whole machine base 22 is placed on an arc-shaped tool 4, the arc-shaped tool 4 is in a convex shape, the arc-shaped tool 4 is positioned on one side of the whole machine base 22 away from the adhesive surface 223, the whole machine base 22 is bent by the arc-shaped tool 4, at this time, a first deformation zone 221 of the whole machine base 22 is in a compression state, and the first deformation zone 221 is subjected to the compression force pointing to the center by the first end and the second end.
S1.2, as shown in FIG. 11, bonding the flexible display panel 1 to a preset surface of the pre-tightening substrate 2, wherein the preset surface is a convex surface when the pre-tightening substrate 2 is bent; the two ends of the flexible display panel 1 are clamped by the handles, the flexible display panel 1 is moved by the movement of the handles, so that the flexible display panel 1 moves to the upper side of the preset surface of the whole machine base 22, wherein the preset surface is a convex surface of the whole machine base 22 after being bent, the convex surface is an adhesive surface 223 of the whole machine base 22, and then the flexible display panel 1 is adhered to the adhesive surface 223, and the two surfaces are adhered. The flexible display panel 1 has a second deformation region 14 and a second non-deformation region 15, the second non-deformation region 15 is located at two ends of the second deformation region 14, at this time, the second deformation region 14 is in a stretched state, and the second deformation region 14 receives a stretching force from the center to the two ends.
S1.3, as shown in fig. 12, the bonded flexible display panel 1 and the pre-tightening substrate 2 are flattened, so that the pre-tightening substrate 2 applies a pre-tightening force to the flexible display panel 1. The flexible display panel 1 and the pre-tightening substrate 2 are flattened by an external force, at this time, the first deformation area 221 of the pre-tightening substrate 2 is in a stretched state, and the second deformation area 14 is in a compressed state, so that the pre-tightening substrate 2 can apply a pre-tightening force with the second end and the first end pointing to the center of the pre-tightening substrate 2 to the flexible display panel 1, the direction indicated by the arrow B in the figure is the direction of the pre-tightening force, and the pre-tightening substrate 2 receives a stretching force applied by the flexible display panel 1 and pointing to the two ends of the pre-tightening substrate 2 from the center, and the direction indicated by the arrow C in the figure is the direction of the stretching force. However, since the flexible display panel 1 is made of a material that is hard relative to the flexible display panel 1, the display panel and the complete machine base 22 after flattening will not warp. As shown in fig. 13, when the flexible display device is bent, the flexible display panel 1 is subjected to tensile stress and initial pretightening force of bending, so that the tensile stress portion of the display panel during bending is counteracted, thereby reducing the overall stress and strain of the module. By bending the integral base after applying the compressive force, the first deformation region 221 of the integral base 22 is changed from the compressive state to the tensile state when the integral base and the flexible display panel are flattened, and the deformation thereof is larger, and the pretightening force applied to the flexible display panel by 1 is larger. The flexible display device further comprises other optical components, including a polarizer, a cover plate and the like, and the complete machine base 22 and the flexible display panel 1 are laminated layer by layer after being flattened.
In addition, the flexible display device includes not only the flexible display panel 1, but also other optical components, such as a polarizer and a cover plate, and when protecting the other optical components, the other optical components and the flexible display panel 1 can be laminated layer by layer in a flat state to form a display module, then the whole machine base 22 is bent, the display module is overlapped and configured on the bent whole machine base 22, so as to perform curved surface lamination, and then the whole display device is laminated, at this time, the display module is shrunk inwards to bear shrinkage stress, i.e. pretightening force, and the whole machine is stretched to both sides to bear stretching force, when the display module is bent, the same force is applied to the flexible display panel 1, the effect is the same, and the repeated description is omitted. When the display module is bent, not only compression force can be applied to pre-compress the whole machine base 22, but also the whole machine base 22 can be directly fixed through the grippers without applying pre-compression force to the whole machine base 22, then the whole machine base 22 is bent into a preset angle through the arc-shaped tool 4, and when the display base and the display module (or the flexible display panel) are flattened, pre-tightening force can be applied to the display module (or the flexible display panel) as well.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A flexible display device, comprising:
the flexible display panel is fixedly attached to the pre-tightening substrate, the pre-tightening substrate comprises a first end and a second end which are opposite to each other, the pre-tightening substrate is used for applying pre-tightening force inwards along the first end and the second end to the flexible display panel, and the pre-tightening force is used for counteracting tensile stress of the flexible display panel in the bending process of the flexible display panel so as to reduce the deformation degree of the flexible display panel;
the whole machine base is used as the pre-tightening substrate and is provided with an adhesive surface, and the flexible display panel is adhered to the adhesive surface of the whole machine base; the whole machine base is of a whole or partial structure for supporting the flexible display panel; the whole machine base comprises a middle frame and a flexible display device shell; bending the whole machine base to form a preset angle, and adhering the flexible display panel to a preset surface of the whole machine base; bending the whole machine base to form a preset angle, bonding the flexible display panel to a preset surface of the whole machine base, and flattening the bonded flexible display panel and the whole machine base.
2. A method for manufacturing a flexible display device, for the flexible display device according to claim 1, comprising:
fixedly bonding the flexible display panel on the pre-tightening substrate, so that the pre-tightening substrate applies pre-tightening force inwards along the first end and the second end of the pre-tightening substrate to the flexible display panel;
the fixing and adhering the flexible display panel to the pre-tightening substrate comprises the following steps:
bending the pre-tightening substrate to form a preset angle;
bonding the flexible display panel to a preset surface of the pre-tightening substrate, wherein the preset surface is a convex surface when the pre-tightening substrate is bent;
flattening the bonded flexible display panel and the pre-tightening substrate to enable the pre-tightening substrate to apply pre-tightening force to the flexible display panel;
wherein the pre-tightening substrate is a whole machine base; the whole machine base is of a whole or partial structure for supporting the flexible display panel; the whole machine base comprises a middle frame and a flexible display device shell;
the pretightening force is used for counteracting the stretching stress of the flexible display panel in the bending process of the flexible display panel so as to reduce the deformation degree of the flexible display panel.
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| CN113053255B (en) * | 2021-03-12 | 2023-08-15 | 京东方科技集团股份有限公司 | Flexible display substrate, preparation method thereof and display device |
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