CN114446179A - Flexible display module, preparation method of flexible display module and flexible display device - Google Patents
Flexible display module, preparation method of flexible display module and flexible display device Download PDFInfo
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- CN114446179A CN114446179A CN202210160684.6A CN202210160684A CN114446179A CN 114446179 A CN114446179 A CN 114446179A CN 202210160684 A CN202210160684 A CN 202210160684A CN 114446179 A CN114446179 A CN 114446179A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 361
- 239000012790 adhesive layer Substances 0.000 claims description 32
- 238000004519 manufacturing process Methods 0.000 claims description 17
- 239000003292 glue Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 22
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The embodiment of the invention discloses a flexible display module, a preparation method of the flexible display module and a flexible display device. The flexible display module comprises a flexible display panel and a flexible supporting layer, wherein the flexible supporting layer is arranged on the non-light-emitting side of the flexible display panel and is provided with a first side edge and a second side edge which are oppositely arranged in the curling direction parallel to the flexible display panel; the flexible supporting layer also comprises a first supporting layer, and the thickness of the first supporting layer is gradually reduced to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or the thickness of the first support layer is gradually reduced to a certain thickness along the direction from the second side edge to the middle of the first support layer; the second supporting layer is arranged on one side, far away from the flexible display panel, of the first supporting layer, and the density of the second supporting layer is smaller than that of the first supporting layer. According to the technical scheme provided by the embodiment of the invention, when the flexible display panel is flattened, the flatness of the edge of the flexible display panel is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a flexible display module, a preparation method of the flexible display module and a flexible display device.
Background
With the development of science and technology, people have higher and higher requirements on display devices. When the flexible display panel is flattened again after the existing flexible display device is folded or curled, curling defects such as warping and the like are easy to occur at the edge of the flexible display panel, and the flatness of the flexible display panel is influenced.
Disclosure of Invention
The embodiment of the invention provides a flexible display module, a preparation method of the flexible display module and a flexible display device, and aims to solve the problem that when a flexible display panel is flattened, the edge of the flexible display panel is poor in curling, and the flatness of the flexible display panel is affected.
In a first aspect, the present invention provides a flexible display module, including a flexible display panel and a flexible support layer, where the flexible support layer is disposed on a non-light-emitting side of the flexible display panel, and in a curling direction parallel to the flexible display panel, the flexible support layer has a first side edge and a second side edge that are disposed opposite to each other;
a flexible support layer, further comprising:
the thickness of the first supporting layer is gradually reduced to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or the thickness of the first support layer is gradually reduced to a certain thickness along the direction from the second side edge to the middle of the first support layer;
the second supporting layer is arranged on one side, far away from the flexible display panel, of the first supporting layer, and the density of the second supporting layer is smaller than that of the first supporting layer.
Optionally, a first concave surface is formed on one side of the first support layer away from the flexible display panel, and a first plane is formed on one side of the first support layer close to the flexible display panel.
Optionally, a second plane is formed on one side of the second support layer away from the first support layer, and the second plane is parallel to the first plane;
a first surface is formed on one side, close to the first supporting layer, of the second supporting layer, and the first surface is attached to the first concave surface of the first supporting layer;
the first surface is convex or planar.
Optionally, the flexible supporting layer further includes:
the first bonding layer is positioned between the first supporting layer and the second supporting layer; the first adhesive layer is used for bonding the first support layer and the second support layer.
Optionally, the first support layer includes a first support portion and a second support portion, the first support portion and the second support portion are symmetrically arranged, and the thickness of the first support portion gradually decreases and the thickness of the second support portion gradually increases along a direction from the first side edge to the second side edge;
preferably, the first supporting portion and the second supporting portion are adjacent to the middle position of the first supporting layer.
Optionally, the first support layer and/or the second support layer comprise an elastic pad or an elastic glue;
when first supporting layer includes the cushion, flexible supporting layer still includes:
and the second bonding layer is arranged between the first supporting layer and the flexible display panel.
Optionally, the thickness of the second supporting layer is less than or equal to 25 um;
the thickness of the first bonding layer is less than or equal to 5 um;
the thickness of the second bonding layer is less than or equal to 5 um.
In a second aspect, the present invention provides a method for manufacturing a flexible display module, including:
providing a flexible display panel;
manufacturing a flexible supporting layer on the non-light-emitting side of the flexible display panel; the flexible supporting layer is provided with a first side edge and a second side edge which are oppositely arranged in the curling direction parallel to the flexible display panel; a flexible support layer, further comprising: the thickness of the first supporting layer is gradually reduced to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or the thickness of the first support layer is gradually reduced to a certain thickness along the direction from the second side edge to the middle of the first support layer; the second supporting layer is arranged on one side, far away from the flexible display panel, of the first supporting layer, and the density of the second supporting layer is smaller than that of the first supporting layer.
Optionally, the manufacturing of the flexible supporting layer on the non-light-emitting side of the flexible display panel includes:
forming a first concave surface on one side of the first supporting layer far away from the flexible display panel by adopting a special-shaped jig;
a first plane is formed on one side of the first support layer close to the flexible display panel.
In a third aspect, the present invention provides a flexible display device, including the flexible display module set arbitrarily proposed in the first aspect.
The flexible supporting layer that this embodiment provided is through setting up the direction in the middle of following first side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually, and/or, the direction in the middle of following second side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually, make the thickness of being close to the first supporting layer in the middle of the first supporting layer thinner, the thickness of the first supporting layer that is close to first side and/or second side relives thickly, because the density of first supporting layer is great, the thickness of the first supporting layer of unit area is big more, the volume is just big more greatly, the quality is just big more greatly. The quality of the first side edge and/or the second side edge of the flexible display panel provided with the first supporting layer is large, so that the flexible display panel provided with the first supporting layer is smoother under the action of gravity, and the problem that the flexible display panel attached to the first supporting layer is warped easily when being in a curling state to a flattening state is effectively solved. Through setting up the less second supporting layer of density that stacks up the setting with the great first supporting layer of density, because the thickness of first supporting layer is inhomogeneous, fill the region that the thickness of first supporting layer is thinner through the second supporting layer, can avoid flexible display panel's side to curl when the exhibition is flat, promote flexible display panel's roughness, can increase the intensity of flexible supporting layer again.
Drawings
Fig. 1 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of another flexible display module according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view illustrating another flexible display module according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view illustrating another flexible display module according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a flexible supporting layer provided by an embodiment of the invention;
FIG. 6 is a top view of a first concave surface of a flexible support layer provided by embodiments of the present invention;
FIG. 7 is a schematic structural diagram of another flexible supporting layer provided by the embodiment of the invention;
FIG. 8 is a schematic structural diagram of another flexible supporting layer provided by the embodiment of the invention;
FIG. 9 is a schematic structural diagram of another flexible supporting layer provided by the embodiment of the invention;
FIG. 10 is a schematic structural diagram of a first support layer of a flexible support layer according to an embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a first support layer of another flexible support layer provided by an embodiment of the present invention;
FIG. 12 is a schematic structural diagram of another flexible supporting layer provided by the embodiment of the invention;
FIG. 13 is a schematic structural diagram of another flexible supporting layer provided by the embodiment of the invention;
FIG. 14 is a top view of a support portion of a first support layer of a flexible support layer provided by embodiments of the present invention;
FIG. 15 is a top view of a support portion of a first support layer of another flexible support layer provided by embodiments of the present invention;
FIG. 16 is a schematic structural diagram of another flexible display module according to an embodiment of the present invention;
fig. 17 is a flowchart of a method for manufacturing a flexible display module according to an embodiment of the present invention;
FIG. 18 is a flowchart of another method for manufacturing a flexible display module according to an embodiment of the present invention;
fig. 19 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background, the crimp die set is relatively thin and develops toward a small radius, multiple turns. When the flexible display panel is folded or curled, poor curling is easy to occur at the edge of the flexible display panel, and the flatness and the display effect of the flexible display panel are affected.
Fig. 1 is a schematic structural diagram of a flexible display module according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of another flexible display module according to an embodiment of the invention. Fig. 3 is a schematic cross-sectional view illustrating a flexible display module according to another embodiment of the present invention. Fig. 4 is a schematic cross-sectional view illustrating a flexible display module according to another embodiment of the present invention. With reference to fig. 1 to 4, the flexible display module 300 provided by the present invention includes a flexible display panel 200 and a flexible support layer 100, wherein the flexible support layer 100 is disposed on a non-light-emitting side of the flexible display panel 200, and in a direction parallel to a curling direction of the flexible display panel 200, the flexible support layer 100 has a first side edge D1 and a second side edge D2 that are disposed oppositely; the flexible supporting layer 100 further comprises a first supporting layer 1, and the thickness of the first supporting layer 1 is gradually reduced to a certain thickness along the direction from the first side edge D1 to the middle of the first supporting layer 1; and/or, the thickness of the first support layer 1 is gradually reduced to a certain thickness along the direction from the second side edge D2 to the middle of the first support layer 1; and the second support layer 2 is disposed on a side of the first support layer 1 away from the flexible display panel 200, and the density of the second support layer is less than that of the first support layer.
Specifically, the flexible display module includes flexible display panel 200, and flexible supporting layer 100 sets up in the non-light-emitting side of flexible display panel 200, avoids flexible supporting layer 100 to shelter from the light of flexible display panel 200's outgoing to guarantee flexible display panel 200's display effect.
In a curling direction parallel to the flexible display panel 200, the flexible support layer 100 has a first side edge D1 and a second side edge D2 which are oppositely arranged; the flexible display panel 200 further includes a first top edge and a second bottom edge, the first top edge being curled around a curling axis, or the second bottom edge being curled around a curling axis. The first top edge may be disposed adjacent one end of the first and second side edges and the second bottom edge may be disposed adjacent the other end of the first and second side edges. The first side and the second side are curled as the flexible display panel is curled, and the first side and the second side are stretched as the flexible display panel is unfolded.
The first support layer 1 may include a flexible material layer having a large density, such as an elastic cushion layer or an elastic glue layer. Since the first side D1 and the second side D2 of the flexible display panel 200 are easily curled when the flexible display panel 200 is turned from the curled state to the flattened state, the first side D1 and the second side D2 of the flexible support layer 100 may be respectively disposed corresponding to both sides of the flexible display panel 200.
By setting the direction along the first side edge D1 toward the middle of the first support layer 1, the thickness of the first support layer 1 with a large density is gradually reduced to a certain thickness, so that the thickness of the first support layer 1 close to the first side edge D1 is thicker, and the thickness of the first support layer 1 close to the middle of the first support layer 1 is thinner. The greater density of the first support layer 1 results in a greater mass of the first support layer 1 having a greater thickness at the first side edge D1 and a lesser mass of the first support layer 1 having a lesser thickness near the middle of the first support layer 1. The thickness of the first supporting layer 1 close to the first side D1 is thick, the volume is large, the mass of the first supporting layer 1 close to the first side D1 is large, the first side D1 of the flexible display panel provided with the first supporting layer 1 is more flat under the action of gravity, and the warpage problem of the flexible display panel 200 attached to the first supporting layer 1 can be effectively reduced by the arrangement.
By arranging the direction from the second side edge D2 to the middle of the first support layer 1, the thickness of the first support layer 1 with higher density is gradually reduced to a certain thickness, so that the thickness of the first support layer 1 close to the second side edge D2 is thicker, and the thickness of the first support layer 1 close to the middle of the first support layer 1 is thinner. Due to the higher density of the first support layer 1, the first support layer 1 having the larger thickness at the second side edge D2 has a larger mass, and the first support layer 1 having the smaller thickness near the middle of the first support layer 1 has a smaller mass. The thickness of the first supporting layer 1 close to the second side edge D2 is thick, the volume is large, the mass of the first supporting layer 1 close to the second side edge D2 is large, the second side edge D2 of the flexible display panel 200 provided with the first supporting layer 1 is flat under the action of gravity, and the warping problem existing in the flexible display panel 200 attached to the first supporting layer 1 from the curling state to the flattening state can be effectively reduced by the arrangement.
Fig. 2 exemplarily shows a case where the thickness of the first support layer 1 is gradually reduced to a certain thickness along the first side edge D1 toward the middle of the first support layer 1. Fig. 3 exemplarily shows a case where the thickness of the first support layer 1 is gradually reduced to a certain thickness in a direction along the second side edge D2 toward the middle of the first support layer 1. Fig. 4 exemplarily shows a case where the thickness of the first support layer 1 is gradually reduced to a certain thickness in a direction toward the middle of the first support layer 1 along the first side edge D1, and the thickness of the first support layer 1 is gradually reduced to a certain thickness in a direction toward the middle of the first support layer 1 along the second side edge D2.
The second support layer 2 may comprise a low density glue or a low density PI or the like. The surface of the second support layer 2 on the side away from the first support layer 1 may be concave or flat, and is not limited herein. It should be noted that fig. 2 to 3 only exemplarily show a case where a surface of the second support layer 2 on a side away from the first support layer 1 is a plane, and do not limit the second support layer 2.
Through the second supporting layer 2 which is arranged in a stacking manner with the first supporting layer 1, the density of the second supporting layer 2 is smaller than that of the first supporting layer 1, so that the second supporting layer 2 can better fill the area with the thinner thickness of the first supporting layer 1, the planarization of the flexible supporting layer 100 is better, and the laminating and the subsequent manufacturing process are facilitated. On the other hand, the thickness of the first support layer 1 is not uniform, and the second support layer 2 fills the thin region of the first support layer 1, so that the side edge of the flexible display panel 200 can be prevented from curling when the flexible display panel is in a flattened state, and the strength of the flexible support layer 100 can be increased.
The flexible supporting layer that this embodiment provided is through setting up the direction in the middle of following first side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually, and/or, the direction in the middle of following second side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually, make the thickness of being close to the first supporting layer in the middle of the first supporting layer thinner, the thickness of the first supporting layer that is close to first side and/or second side relives thickly, because the density of first supporting layer is great, the thickness of the first supporting layer of unit area is big more, the volume is just big more greatly, the quality is just big more greatly. The quality of the first side edge and/or the second side edge of the flexible display panel provided with the first supporting layer is large, so that the flexible display panel provided with the first supporting layer is smoother under the action of gravity, and the problem that the flexible display panel attached to the first supporting layer is warped easily when being in a curling state to a flattening state is effectively solved. Through setting up the less second supporting layer of density that stacks up the setting with the great first supporting layer of density, because the thickness of first supporting layer is inhomogeneous, fill the region that the thickness of first supporting layer is thinner through the second supporting layer, can avoid flexible display panel's side to curl when the exhibition is flat, promote flexible display panel's roughness, can increase the intensity of flexible supporting layer again.
Optionally, fig. 5 is a schematic structural diagram of a flexible supporting layer according to an embodiment of the present invention. Fig. 6 is a top view of a first concave surface of a flexible support layer provided by an embodiment of the present invention. On the basis of the above embodiments, with reference to fig. 4 to 6, a first concave surface 11 is formed on a side of the first support layer 1 away from the flexible display panel 200, and a first flat surface 12 is formed on a side of the first support layer 1 close to the flexible display panel 200.
Specifically, the first side 111 of the first concave surface 11 is located at the first side D1, the second side 112 of the first concave surface 11 is located at the second side D2, and the first concave surface 11 extends from the first side 111 to the second side 112; the first plane 12 is opposite to the first concave surface 11, and the second supporting layer 2 is arranged on the side of the first concave surface 11 far away from the first plane 12. It may be provided that at least part of the orthographic projection of the second support layer 2 on the first support layer 1 overlaps the first support layer 1.
The first concave surface 11 may be a tapered surface or a concave curved surface. The first and second edges 111, 112 may be lengthwise edges of the flexible support layer 100. The first side edge D1 and the second side edge D2 may be disposed as needed, and for example, the first side edge D1 may correspond to a left frame of the flexible display device, and the second side edge D2 may correspond to a right frame of the flexible display device, which is not limited herein. Because the side of flexible display screen takes place to curl to the centre easily, second supporting layer 2 sets up in the one side that first concave surface 11 kept away from first plane 12 for one side of flexible supporting layer 100 is the plane, is convenient for with the laminating of flexible display panel, increases the laminating area of flexible supporting layer 100 and flexible display panel.
Partial orthographic projection of the second supporting layer 2 on the first supporting layer 1 can be arranged to overlap with the first supporting layer 1 as required, for example, the orthographic projection of the second supporting layer 2 on the first supporting layer 1 can be arranged to be staggered with the first supporting layer 1 in an area close to the middle of the first supporting layer 1, so that the material of the first supporting layer 1 can be saved. Or, the orthographic projection of the second support layer 2 on the first support layer 1 can be completely overlapped with the first support layer 1 according to the requirement, so that the contact area between the first support layer 1 and the flexible display panel can be further increased, and the problem that the first support layer 1 arranged at intervals is peeled off is avoided.
Optionally, fig. 7 is a schematic structural diagram of another flexible supporting layer provided in an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, the side of the second support layer 2 away from the first support layer 1 forms a second plane 21, and the second plane 21 is parallel to the first plane 12; a first surface 22 is formed on one side of the second supporting layer 2 close to the first supporting layer 1, and the first surface 22 is attached to the first concave surface 11 of the first supporting layer 1; the first surface 22 is convex or planar.
Specifically, when the first surface 22 of the second support layer 2 is a convex surface, the first surface is completely attached to the first concave surface 11 of the first support layer 1, so that the second support layer 2 can fill the concave area formed by the first concave surface 11 of the first support layer 1. When the first surface 22 is a plane, a low-density elastic material or a low-density elastic glue can be filled between the first support layer 1 and the second support layer 2 to fill the concave area formed by the first concave surface 11 of the first support layer 1. The second plane 21 is parallel to the first plane 12, so that the surface of the second supporting layer 2 on the side far away from the first supporting layer 1 is a plane, the flexible supporting layer 100 is convenient to support the flexible display panel, and the contact area between the flexible supporting layer 100 and the flexible display panel is increased. The first surface and the second surface of the flexible support layer 100 are both flat surfaces, which facilitates the fabrication of other film layers on both sides of the flexible support layer 100.
It should be noted that fig. 7 exemplarily shows that a gap is included between the first concave surface 11 and the first surface 22, and the gap is only used for illustrating the surfaces of the first concave surface 11 and the first surface 22, and the first concave surface 11 and the first surface 22 can directly fit, but are not limited to the first concave surface 11 and the first surface 22.
Optionally, fig. 8 is a schematic structural diagram of another flexible supporting layer provided in an embodiment of the present invention. Fig. 9 is a schematic structural diagram of another flexible supporting layer provided by an embodiment of the present invention. On the basis of the above embodiment, with reference to fig. 8 and 9, the flexible support layer 100 may further include a first adhesive layer 23, where the first adhesive layer 23 is located between the first support layer 1 and the second support layer 2; the first adhesive layer 23 is used to adhere the first support layer 1 and the second support layer 2.
Specifically, the density of the first adhesive layer 23 is smaller than that of the first support layer 1. Referring to fig. 7, the thickness of the first adhesive layer 23 is constant in a direction toward the middle of the first adhesive layer 23 along the first side edge D1. The thickness of adhesive linkage is even, can conveniently save the material of first adhesive linkage 23 with the better bonding of first supporting layer 1, makes things convenient for first adhesive linkage 23 and the laminating of first supporting layer 1.
Alternatively, referring to fig. 9, the thickness of the first adhesive layer 23 gradually increases in a direction from the first side edge D1 toward the middle of the first adhesive layer 23. Set up first adhesive linkage 23 like this and can be better fill first concave surface 11 of first supporting layer 1 for the surface of first adhesive linkage 23 keeping away from first supporting layer 1 one side is as gentle as possible, the preparation of rete in the follow-up processing of being convenient for. The material of the first adhesive layer 23 can include PSA glue, and the thickness of the first adhesive layer 23 is less than or equal to 5 um.
Alternatively, on the basis of the above embodiment, with continued reference to fig. 8, the first adhesive layer 23 includes a second convex surface 231 adjacent to the first support layer 1 and a second surface 232 remote from the first support layer 1. The second supporting layer 2 can be an ultrathin low-density PI layer, and the thickness of the second supporting layer 2 is larger than or equal to 25 um. The second supporting layer 2 is attached to the first adhesive layer 23, and the first adhesive layer 23 is used for bonding the first supporting layer 1 to the second supporting layer 2. The second support layer 2 serves to protect the first adhesive layer 23 and also to improve the flatness of the flexible support layer 100.
It should be noted that fig. 8 and 9 exemplarily show that a gap is included between the first surface 22 and the second surface 232, and the gap is only used for illustrating the surfaces of the first surface 22 and the second surface 232, and the first surface 22 and the second surface 232 may be directly attached in an actual product, and are not limited to the first surface 22 and the second surface 232.
Optionally, on the basis of the above embodiment, with continued reference to fig. 8, the second surface 232 of the first adhesive layer 23 is a concave surface, and the first surface 22 of the second support layer 2 is a convex surface; alternatively, with continued reference to fig. 9, the second surface 232 of the first adhesive layer 23 is planar and the first surface 22 of the second support layer 2 is planar.
Specifically, the first surface 232 of the first adhesive layer 23 is a concave surface, and the first surface 22 of the second support layer 2 is a convex surface, so that the first adhesive layer 23 and the second support layer 2 can be tightly attached, and the second support layer 2 can better protect the first adhesive layer 23.
The first surface 232 of the first adhesive layer 23 is a plane, and the first surface 22 of the second support layer 2 is a plane, so that the surface of the first adhesive layer 23 away from one side of the first support layer 1 is a plane, the second support layer 2 is convenient to manufacture, and the flatness of the first adhesive layer 23 is further improved.
Optionally, fig. 10 is a schematic structural diagram of a first support layer of a flexible support layer according to an embodiment of the present invention. Fig. 11 is a schematic structural diagram of a first support layer of another flexible support layer provided by an embodiment of the invention. On the basis of the above embodiment, with reference to fig. 10 and 11, the first supporting layer 1 includes the first supporting portion 14 and the second supporting portion 15, the first supporting portion 14 and the second supporting portion 15 are symmetrically arranged, and the thickness of the first supporting portion 14 gradually decreases and the thickness of the second supporting portion 15 gradually increases in a direction from the first side edge D1 to the second side edge D2; preferably, the first supporting portion 14 and the second supporting portion 15 are adjacent to the middle position of the first supporting layer 1.
In particular, the first support layer 1 may comprise a support portion 13, the support portion 13 comprising a first support face 131 adjacent to the second support layer 2, a second support face 132 disposed opposite to the first support face 131, and a first side face 133 abutting against the first support face 131 and the second support face 132, respectively; the first side 133 is located at the first side D1 or the second side D2 of the first support layer 1; in the region between the first and second side edges D1 and D2 of the first support layer 1, the first and second support surfaces 131 and 132 are adjacent to the third edge 134. Alternatively, fig. 12 is a schematic structural diagram of another flexible supporting layer provided in an embodiment of the present invention. Referring to fig. 12, the supporting portion 13 further includes a second side surface 135 disposed opposite to the first side surface 133, and the first supporting surface 131 and the second supporting surface 132 are respectively adjacent to the second side surface 135; the first supporting surface 131 includes a flat surface or a curved surface.
The first side 133 may be a side of the first support layer 1. The first supporting surface 131 includes a plane or a curved surface, so that the position of the first supporting layer 1 close to the first side D1 or the second side D2 is thick, the material of the first supporting layer 1 is thick, and the thicker the thickness of the first supporting layer 1 is, the heavier the weight is, when the first supporting layer is attached to one side of the flexible display panel, the problem that the flexible display panel is easy to warp can be better improved, the flatness of the flexible display panel during unfolding is further improved, and the display effect of the flexible display panel is improved. The first support surface 131 and the second support surface 132 are adjacent to the third edge 134, and the first support surface 131 is sloped to overlap the second support surface 132. The arrangement makes the transition of the supporting part 13 more uniform, which is beneficial to avoiding stress concentration.
Referring to fig. 12, the supporting portion 13 may further include a second side surface 135 disposed opposite to the first side surface 133, the first supporting surface 131 and the second supporting surface 132 are respectively adjacent to the second side surface 135, and when the supporting portion 13 includes two supporting portions 13, the second side surfaces 135 of the two supporting portions 13 may be attached to each other, so that the supporting portion 13 may be formed in a whole layer structure, and the mechanical strength and the structural stability of the first supporting layer 1 may be improved.
Optionally, fig. 13 is a schematic structural diagram of another flexible supporting layer provided in an embodiment of the present invention. Fig. 14 is a top view of a support portion of a first support layer of a flexible support layer according to an embodiment of the present invention. With reference to fig. 13 and 14, the supporting portion 13 may include a first supporting portion 14 and a second supporting portion 15, wherein the first side 133 of the first supporting portion 14 is located at the first side D1, and the first supporting surface 131 of the first supporting portion 14 extends from the first side D1 to the second side D2; the first side surface 133 of the second support portion 15 is located at the second side edge D2; the first supporting surface 131 of the second supporting portion 15 extends from the second side D2 to the first side D1; the orthographic projection of the third edge 134 of the first support section 14 on the second supporting section 2 is coincident with or offset from the orthographic projection of the third edge of the second support section 15 on the second supporting section 2. Alternatively, fig. 15 is a top view of a support portion of a first support layer of another flexible support layer provided by embodiments of the present invention. With reference to fig. 12 and 15, the orthographic projection of the second side surface 135 of the first support 14 on the second supporting layer 2 coincides with the orthographic projection of the second side surface 135 of the second support 15 on the second supporting layer 2.
Specifically, referring to fig. 13 and 14, the first side surface 133 of the first supporting portion 14 is located at the first side edge D1, and the first supporting surface 131 of the first supporting portion 14 extends from the first side edge D1 to the second side edge D2, so that the first supporting portion 14 starts at the first side edge D1. The first side 133 of the second supporting portion 15 is located at the second side D2, and the first supporting surface 131 of the second supporting portion 15 extends from the second side D2 to the first side D1, so that the second supporting portion 15 starts from the second side D2, and the problem that the first side D1 and the second side D2 are easily curled when the flexible display panel is unfolded and flat can be further solved. The orthographic projection of the third edge 134 of the first support part 14 on the second support layer 2 may be coincident with or offset from the orthographic projection of the third edge of the second support part 15 on the second support layer 2, as required, and fig. 13 and 14 exemplarily show a case where the orthographic projection of the third edge 134 of the first support part 14 on the second support layer 2 is offset from the orthographic projection of the third edge of the second support part 15 on the second support layer 2, which is not limited herein.
Preferably, the first supporting portion 14 and the second supporting portion 15 are adjacent to the middle position of the first supporting layer 1. With reference to fig. 12 and 15, the orthographic projection of the second side surface 135 of the first supporting portion 14 on the second supporting layer 2 is overlapped with the orthographic projection of the second side surface 135 of the second supporting portion 15 on the second supporting layer 2, so that the first supporting portion 14 and the second supporting portion 15 can be integrally manufactured, and the mechanical strength of the first supporting layer 1 is improved.
Optionally, fig. 16 is a schematic structural diagram of another flexible display module according to an embodiment of the present invention. On the basis of the above embodiment, with reference to fig. 16, the first support layer 1 and/or the second support layer 2 comprise elastic pads or elastic glues; when the first support layer 1 includes an elastic pad, the flexible support layer 100 further includes: and a second adhesive layer 3, wherein the second adhesive layer 3 is disposed between the first support layer 1 and the flexible display panel 200.
Specifically, the first support layer 1 includes a high-density elastic pad or elastic glue. The second support layer 2 comprises a low density elastic pad or glue. Because the cushion is the flexible pad, the cushion does not have viscidity, sets up the less second adhesive linkage 3 of density through keeping away from one side of second supporting layer 2 at first supporting layer 1, and because the viscosity of second adhesive linkage 3 is greater than the viscosity of cushion for first supporting layer 1 is laminated with flexible display panel through second adhesive linkage 3. The material of the second adhesive layer 3 can comprise PSA glue, and the thickness of the second adhesive layer 3 is less than or equal to 5 um. The density of the second adhesive layer 3 may be set to be lower than that of the first support layer 1, and the viscosity of the second adhesive layer 3 may be set to be higher than that of the elastic pad.
It should be noted that, when the first support layer 1 includes an elastic glue, the material of the elastic glue may include, for example, a low-density thermosetting glue or a low-density UV glue. The thickness range of the first support layer 1 may be set as desired, and is not limited herein.
Fig. 17 is a flowchart of a method for manufacturing a flexible display module according to an embodiment of the present invention. Referring to fig. 17, the method for manufacturing a flexible display module according to the present invention includes:
and S101, providing a flexible display panel.
S102, manufacturing a flexible supporting layer on the non-light-emitting side of the flexible display panel; the flexible supporting layer is provided with a first side edge and a second side edge which are oppositely arranged in the curling direction parallel to the flexible display panel; a flexible support layer, further comprising: the thickness of the first supporting layer is gradually reduced to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or the thickness of the first support layer is gradually reduced to a certain thickness along the direction from the second side edge to the middle of the first support layer; the second supporting layer is arranged on one side, far away from the flexible display panel, of the first supporting layer, and the density of the second supporting layer is smaller than that of the first supporting layer.
Optionally, fig. 18 is a flowchart of a manufacturing method of another flexible display module according to an embodiment of the present invention. On the basis of the above embodiments, referring to fig. 18, the method for manufacturing a flexible display module according to the present invention includes:
and S101, providing a flexible display panel.
S201, forming a first concave surface on one side, far away from the flexible display panel, of the first supporting layer by using a special-shaped jig; and forming a first plane on one side of the first support layer close to the flexible display panel, and forming the first support layer on the non-light-emitting side of the flexible display panel.
S202, manufacturing a second supporting layer on one side, far away from the flexible display panel, of the first supporting layer; wherein the density of the second support layer is less than the density of the first support layer.
Fig. 19 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention. Referring to fig. 19, the flexible display device 400 provided by the invention includes the flexible display module 300 according to any of the embodiments. The beneficial effects of the flexible display module 200 according to any of the above embodiments are not described herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The flexible display module is characterized by comprising a flexible display panel and a flexible support layer, wherein the flexible support layer is arranged on the non-light-emitting side of the flexible display panel and is provided with a first side edge and a second side edge which are oppositely arranged in the curling direction parallel to the flexible display panel;
the flexible support layer further comprises:
the thickness of the first supporting layer is gradually reduced to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or the thickness of the first support layer is gradually reduced to a certain thickness along the direction from the second side edge to the middle of the first support layer;
the second supporting layer is arranged on one side, far away from the flexible display panel, of the first supporting layer, and the density of the second supporting layer is smaller than that of the first supporting layer.
2. The flexible display module of claim 1,
one side of the first supporting layer, which is far away from the flexible display panel, forms a first concave surface, and one side of the first supporting layer, which is close to the flexible display panel, forms a first plane.
3. The flexible display module of claim 2,
a second plane is formed on one side, far away from the first supporting layer, of the second supporting layer, and the second plane is parallel to the first plane;
a first surface is formed on one side, close to the first supporting layer, of the second supporting layer, and the first surface is attached to the first concave surface of the first supporting layer;
the first surface is convex or planar.
4. The flexible display module of claim 2, wherein the flexible support layer further comprises:
a first adhesive layer between the first support layer and the second support layer; the first adhesive layer is used for bonding the first support layer and the second support layer.
5. The flexible display module according to claim 1, wherein the first support layer comprises a first support portion and a second support portion, the first support portion and the second support portion are symmetrically arranged, and the thickness of the first support portion gradually decreases and the thickness of the second support portion gradually increases along the direction from the first side edge to the second side edge;
preferably, the first supporting portion and the second supporting portion are adjacent to a middle position of the first supporting layer.
6. The flexible display module of claim 4, wherein the first support layer and/or the second support layer comprises an elastic pad or an elastic glue;
when the first support layer comprises the elastic pad, the flexible support layer further comprises:
a second adhesive layer disposed between the first support layer and the flexible display panel.
7. The flexible display module of claim 6,
the thickness of the second supporting layer is less than or equal to 25 um;
the thickness of the first bonding layer is less than or equal to 5 um;
the thickness of the second bonding layer is less than or equal to 5 um.
8. A preparation method of a flexible display module is characterized by comprising the following steps:
providing a flexible display panel;
manufacturing a flexible supporting layer on the non-light-emitting side of the flexible display panel; wherein the flexible support layer has a first side and a second side disposed opposite to each other in a curling direction parallel to the flexible display panel; the flexible support layer further comprises: the thickness of the first supporting layer is gradually reduced to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or the thickness of the first support layer is gradually reduced to a certain thickness along the direction from the second side edge to the middle of the first support layer; the second supporting layer is arranged on one side, far away from the flexible display panel, of the first supporting layer, and the density of the second supporting layer is smaller than that of the first supporting layer.
9. The method for manufacturing a flexible display module according to claim 8, wherein the manufacturing a flexible supporting layer on the non-light-emitting side of the flexible display panel comprises:
forming a first concave surface on one side of the first supporting layer, which is far away from the flexible display panel, by adopting a special-shaped jig;
and forming a first plane on one side of the first support layer close to the flexible display panel.
10. A flexible display device, comprising the flexible display module according to any one of claims 1 to 7.
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| CN114446179B (en) | 2023-10-24 |
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