CN114446179B - 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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- CN114446179B CN114446179B CN202210160684.6A CN202210160684A CN114446179B CN 114446179 B CN114446179 B CN 114446179B CN 202210160684 A CN202210160684 A CN 202210160684A CN 114446179 B CN114446179 B CN 114446179B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000010410 layer Substances 0.000 claims description 370
- 239000012790 adhesive layer Substances 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 4
- 238000002788 crimping Methods 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 11
- 239000003292 glue Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 230000007704 transition 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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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electroluminescent Light Sources (AREA)
- Laminated Bodies (AREA)
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 and a second side which are oppositely arranged in a direction parallel to the curling direction of the flexible display panel; the flexible supporting layer further 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, gradually reducing the thickness of the first supporting layer to a certain thickness along the direction from the second side edge to the middle of the first supporting 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. The technical scheme provided by the embodiment of the invention improves the flatness of the edge of the flexible display panel when the flexible display panel is flattened.
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, the requirements of people on display devices are increasing. When the existing flexible display device is folded or curled, and then the flexible display panel is flattened again, curling defects such as warping and the like are likely to occur at the edge of the flexible display panel, and the flatness of the flexible display panel is affected.
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, which are used for solving the problem that the edge of the flexible display panel is poor in curling and the flatness of the flexible display panel is affected when the flexible display panel is flattened.
In a first aspect, the present invention provides a flexible display module, including a flexible display panel and a flexible supporting layer, where the flexible supporting layer is disposed on a non-light-emitting side of the flexible display panel, and in a direction parallel to a curling direction of the flexible display panel, the flexible supporting layer has a first side and a second side that are disposed opposite to each other;
the flexible supporting layer, still include:
the first supporting layer gradually reduces the thickness of the first supporting layer to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or, gradually reducing the thickness of the first supporting layer to a certain thickness along the direction from the second side edge to the middle of the first supporting 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 side of the first supporting layer away from the flexible display panel forms a first concave surface, and a side of the first supporting layer close to the flexible display panel forms a first plane.
Optionally, a second plane is formed on one side of the second supporting layer away from the first 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.
Optionally, the flexible support layer further comprises:
a first adhesive layer located 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.
Optionally, the first supporting layer includes a first supporting portion and a second supporting portion, the first supporting portion and the second supporting portion are symmetrically arranged, and in a direction from the first side edge to the second side edge, a thickness of the first supporting portion is gradually reduced, and a thickness of the second supporting portion is gradually increased;
preferably, the first support portion and the second support portion are adjacent to an intermediate position of the first support layer.
Optionally, the first support layer and/or the second support layer comprises an elastic pad or an elastic gel;
when the first support layer includes an elastic pad, the flexible support layer further includes:
and the second adhesive 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 25um;
the thickness of the first bonding layer is less than or equal to 5um;
the thickness of the second adhesive layer is less than or equal to 5um.
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; wherein, in the curling direction parallel to the flexible display panel, the flexible supporting layer is provided with a first side edge and a second side edge which are oppositely arranged; the flexible supporting layer, still include: the first supporting layer gradually reduces the thickness of the first supporting layer to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or, gradually reducing the thickness of the first supporting layer to a certain thickness along the direction from the second side edge to the middle of the first supporting 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, fabricating a flexible supporting layer on a non-light-emitting side of the flexible display panel includes:
forming a first concave surface on one side of the first support 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 near the flexible display panel.
In a third aspect, the present invention provides a flexible display device, including the flexible display module set forth in any of the first aspects.
The flexible supporting layer that this embodiment provided is through setting up along the direction in the middle of first side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually, and/or, along the direction in the middle of second side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually for the thickness of the first supporting layer in the middle of being close to first supporting layer is thinner, and the thickness of the first supporting layer that is close to first side and/or second side teaches thick, because the density of first supporting layer is great, the thickness of the great thickness of the first supporting layer of unit area is bigger, and the volume is also bigger, and the quality is bigger. The flexible display panel provided with the first supporting layer is large in mass of the first side edge and/or the second side edge, and under the action of gravity, the flexible display panel provided with the first supporting layer is flatter, and the problem that the flexible display panel attached to the first supporting layer is easy to warp from a curled state to a flattened state is effectively reduced. Through setting up the less second supporting layer of density with the range upon range of first supporting layer that the density is great, because the thickness of first supporting layer is inhomogeneous, pack the thinner region of thickness of first supporting layer through the second supporting layer, flexible display panel's side is curled when flattening can be avoided, promotes flexible display panel's roughness, can increase flexible supporting layer's intensity 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 structure of another flexible display module according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of another flexible display module according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure of another flexible display module according to an embodiment of the invention;
FIG. 5 is a schematic view of a flexible support 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 in accordance with an embodiment of the present invention;
FIG. 7 is a schematic view of another flexible support layer according to an embodiment of the present invention;
FIG. 8 is a schematic view of a structure of yet another flexible support layer provided by an embodiment of the present invention;
FIG. 9 is a schematic view of a structure of yet another flexible support layer provided by an embodiment of the present invention;
FIG. 10 is a schematic view of a first support layer of a flexible support layer according to an embodiment of the present invention;
FIG. 11 is a schematic view of a first support layer of another flexible support layer according to an embodiment of the present invention;
FIG. 12 is a schematic view of a structure of yet another flexible support layer provided by an embodiment of the present invention;
FIG. 13 is a schematic view of a structure of yet another flexible support layer provided by 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;
FIG. 15 is a top view of a support portion of a first support layer of another flexible support layer provided in accordance with an embodiment of the present invention;
FIG. 16 is a schematic view of a flexible display module according to another 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 a 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 invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
As mentioned in the background, the crimping die set is thinner and the crimping die set is evolving toward a small radius, multiple turns. When folding or curling is realized, curling failure easily occurs 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 structure of another flexible display module according to an embodiment of the invention. Fig. 3 is a schematic cross-sectional view of another flexible display module according to an embodiment of the invention. Fig. 4 is a schematic cross-sectional view of another flexible display module according to an embodiment of the invention. Referring to fig. 1 to 4, the flexible display module 300 provided by the present invention includes a flexible display panel 200 and a flexible supporting layer 100, wherein the flexible supporting layer 100 is disposed on a non-light-emitting side of the flexible display panel 200, and the flexible supporting layer 100 has a first side D1 and a second side D2 disposed opposite to each other in a curl direction parallel to the flexible display panel 200; 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, along the direction of the second side edge D2 toward the middle of the first support layer 1, the thickness of the first support layer 1 gradually decreases to a certain thickness; the second supporting layer 2 is disposed on a side of the first supporting layer 1 away from the flexible display panel 200, and the density of the second supporting layer is less than that of the first supporting layer.
Specifically, the flexible display module includes the flexible display panel 200, and the flexible supporting layer 100 is disposed on the non-light-emitting side of the flexible display panel 200, so as to avoid the flexible supporting layer 100 from shielding the emergent light of the flexible display panel 200, thereby ensuring the display effect of the flexible display panel 200.
The flexible support layer 100 has a first side D1 and a second side D2 disposed opposite to each other in a curling direction parallel to the flexible display panel 200; the flexible display panel 200 further includes a first top edge and a second bottom edge, the first top edge being curled about a curl axis, or the second bottom edge being curled about a curl axis. The first top edge may be disposed adjacent one end of the first side edge and the second side edge, and the second bottom edge may be disposed adjacent the other end of the first side edge and the second side edge. The first side and the second side curl with the curl of the flexible display panel, and the first side and the second side stretch with the unfolding of the flexible display panel.
The first support layer 1 may include a flexible material layer having a large density such as an elastic cushion layer or an elastic adhesive layer. Since the first and second sides D1 and D2 of the flexible display panel 200 are easily curled in parallel to the curling direction of the flexible display panel 200 when the flexible display panel 200 is changed from the curled state to the flattened state, the first and second sides D1 and D2 of the flexible support layer 100 may be disposed corresponding to both sides of the flexible display panel 200, respectively.
Through setting up along the direction of the centre of first side D1 to first supporting layer 1, the thickness of the great first supporting layer 1 of density reduces gradually to certain thickness for the thickness of the first supporting layer 1 that is close to first side D1 is thicker, and the thickness of the first supporting layer 1 that is close to the centre of first supporting layer 1 is thinner. Due to the greater density of the first support layer 1, the mass of the first support layer 1 having a thicker thickness at the first side D1 is greater, and the mass of the first support layer 1 having a thinner thickness near the middle of the first support layer 1 is smaller. The thickness of the first supporting layer 1 close to the first side edge D1 is thicker, and the volume is larger, so that the first supporting layer 1 close to the first side edge D1 is larger in mass, the first side edge D1 of the flexible display panel provided with the first supporting layer 1 is flatter under the action of gravity, and the warping problem of the flexible display panel 200 attached to the first supporting layer 1 can be effectively reduced through the arrangement.
Through setting up along the direction of the centre of second side D2 to first supporting layer 1, the thickness of the great first supporting layer 1 of density reduces gradually to certain thickness for the thickness of the first supporting layer 1 that is close to second side D2 is thicker, and the thickness of the first supporting layer 1 that is close to the centre of first supporting layer 1 is thinner. The first support layer 1 with a thicker thickness on the second side D2 has a larger mass due to the larger density of the first support layer 1, and the first support layer 1 with a thinner thickness near the middle of the first support layer 1 has a smaller mass. The thickness of the first supporting layer 1 near the second side D2 is thicker, and the volume is larger, so that the first supporting layer 1 near the second side D2 has larger mass, and the second side D2 of the flexible display panel 200 provided with the first supporting layer 1 is flatter under the action of gravity, so that the warping problem existing when the flexible display panel 200 attached to the first supporting layer 1 is curled to flattened can be effectively reduced.
Fig. 2 exemplarily shows a case where the thickness of the first support layer 1 gradually decreases to a certain thickness along the first side 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 along the second side 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 along the first side D1 toward the middle of the first support layer 1, and the thickness of the first support layer 1 is gradually reduced to a certain thickness along the second side D2 toward the middle of the first support layer 1.
The second support layer 2 may comprise a low density glue or a low density PI, etc. The surface of the second support layer 2 on the side remote from the first support layer 1 may be concave or planar, and is not limited in any way. It should be noted that fig. 2 to 3 only exemplarily illustrate 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 are not limited to the second support layer 2.
Through setting up the second supporting layer 2 that stacks up with first supporting layer 1 and set up, the density of second supporting layer 2 is less than the density of first supporting layer 1 for second supporting layer 2 can fill the thinner region of thickness of first supporting layer 1 better, makes the planarization of flexible supporting layer 100 better, is convenient for the preparation of laminating and follow-up manufacturing procedure. On the other hand, the thickness of the first supporting layer 1 is not uniform, and the second supporting layer 2 fills the region of the first supporting layer 1 with a thinner thickness, so that the side curl of the flexible display panel 200 in the flattened state can be avoided, and the strength of the flexible supporting layer 100 can be increased.
The flexible supporting layer that this embodiment provided is through setting up along the direction in the middle of first side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually, and/or, along the direction in the middle of second side to first supporting layer, the thickness of the great first supporting layer of density reduces to certain thickness gradually for the thickness of the first supporting layer in the middle of being close to first supporting layer is thinner, and the thickness of the first supporting layer that is close to first side and/or second side teaches thick, because the density of first supporting layer is great, the thickness of the great thickness of the first supporting layer of unit area is bigger, and the volume is also bigger, and the quality is bigger. The flexible display panel provided with the first supporting layer is large in mass of the first side edge and/or the second side edge, and under the action of gravity, the flexible display panel provided with the first supporting layer is flatter, and the problem that the flexible display panel attached to the first supporting layer is easy to warp from a curled state to a flattened state is effectively reduced. Through setting up the less second supporting layer of density with the range upon range of first supporting layer that the density is great, because the thickness of first supporting layer is inhomogeneous, pack the thinner region of thickness of first supporting layer through the second supporting layer, flexible display panel's side is curled when flattening can be avoided, promotes flexible display panel's roughness, can increase flexible supporting layer's intensity 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 according to an embodiment of the present invention. On the basis of the above-described embodiment, referring 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 plane 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 support layer 2 is disposed on a side of the first concave surface 11 away from the first plane 12. At least part of the orthographic projection of the second support layer 2 onto the first support layer 1 may be arranged to overlap the first support layer 1.
The first concave surface 11 may be a conical surface or a concave curved surface. The first edge 111 and the second edge 112 may be edges of the flexible support layer 100 in the length direction. The first side D1 and the second side D2 may be provided as needed, and exemplary, the first side D1 may correspond to a left frame of the flexible display device and the second side D2 may correspond to a right frame of the flexible display device, without any limitation. Because the side of flexible display screen takes place to the centre easily curls, 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 laminate with flexible display panel, increases flexible supporting layer 100 and flexible display panel's laminating area.
The front projection of a part of the second supporting layer 2 on the first supporting layer 1 can be set to overlap with the first supporting layer 1 according to the requirement, for example, the front projection of the second supporting layer 2 on the first supporting layer 1 can be set to be staggered with the first supporting layer 1 in a region close to the middle of the first supporting layer 1, and the material of the first supporting layer 1 can be saved. Or, the orthographic projection of the second supporting layer 2 on the first supporting layer 1 can be set to be completely overlapped with the first supporting layer 1 according to the requirement, so that the contact area between the first supporting layer 1 and the flexible display panel can be further increased, and the problem that the first supporting layer 1 arranged at intervals is peeled off is avoided.
Alternatively, fig. 7 is a schematic structural diagram of another flexible supporting layer according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, a second plane 21 is formed on the side of the second support layer 2 away from the first support layer 1, and the second plane 21 is disposed parallel to the first plane 12; a first surface 22 is formed on one side of the second support layer 2 close to the first support layer 1, and the first surface 22 is attached to the first concave surface 11 of the first support layer 1; the first surface 22 is convex or planar.
Specifically, when the first surface 22 of the second support layer 2 is convex, the first surface is completely adhered 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 planar, a low-density elastic material or a low-density elastic glue may be filled between the first support layer 1 and the second support layer 2 to fill the concave region 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 one side, far away from the first support layer 1, of the second support layer 2 is a plane, the flexible support layer 100 is convenient to support the flexible display panel, and the contact area between the flexible support layer 100 and the flexible display panel is increased. The first surface and the second surface of the flexible supporting layer 100 are both planes, so that other film layers can be conveniently manufactured on two sides of the flexible supporting layer 100.
It should be noted that fig. 7 exemplarily illustrates that a gap is included between the first concave surface 11 and the first surface 22, and the gap is merely used to illustrate the surfaces of the first concave surface 11 and the first surface 22, and the first concave surface 11 and the first surface 22 may be directly attached, not limited to the first concave surface 11 and the first surface 22.
Optionally, fig. 8 is a schematic structural diagram of yet another flexible supporting layer according to an embodiment of the present invention. Fig. 9 is a schematic structural view of yet another flexible support layer according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 8 and 9, the flexible support layer 100 may further include a first adhesive layer 23, the first adhesive layer 23 being 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 not changed in a direction of the first side D1 toward the middle of the first adhesive layer 23. The thickness of adhesive linkage is even, can conveniently be with the better bonding of first supporting layer 1, saves the material of first adhesive linkage 23, makes things convenient for first adhesive linkage 23 and first supporting layer 1 laminating.
Alternatively, referring to fig. 9, the thickness of the first adhesive layer 23 gradually increases in a direction of the first side D1 toward the middle of the first adhesive layer 23. The first concave surface 11 of the first supporting layer 1 can be well filled with the first bonding layer 23, so that the surface of the first bonding layer 23, which is far away from the first supporting layer 1, is as gentle as possible, and the film layer can be conveniently manufactured in the subsequent process. The material of the first adhesive layer 23 may include PSA glue, and the thickness of the first adhesive layer 23 is less than or equal to 5um.
Alternatively, with continued reference to fig. 8, based on the above-described embodiment, 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 more than or equal to 25um. The second support layer 2 is attached to the first adhesive layer 23, and the first adhesive layer 23 is used for adhering the first support layer 1 to the second support layer 2. The second support layer 2 plays a role of protecting the first adhesive layer 23 and also improves the flatness of the flexible support layer 100.
It should be noted that fig. 8 and fig. 9 exemplarily illustrate that the gap between the first surface 22 and the second surface 232 is included, which is merely used to illustrate 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 to each other in an actual product, and are not limited to the first surface 22 and the second surface 232.
Optionally, with continued reference to fig. 8, based on the above embodiment, the second surface 232 of the first adhesive layer 23 is concave, and the first surface 22 of the second support layer 2 is convex; 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 supporting layer 2 is a convex surface, so that the first adhesive layer 23 and the second supporting layer 2 can be tightly attached, and the second supporting layer 2 can better protect the first adhesive layer 23.
The first surface 232 of the first adhesive layer 23 is a plane, the first surface 22 of the second supporting layer 2 is a plane, so that the surface of the first adhesive layer 23 far away from the first supporting layer 1 is a plane, the second supporting layer 2 is convenient to manufacture, and the flatness of the first adhesive layer 23 is further improved.
Alternatively, 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 view of a first support layer of another flexible support layer according to an embodiment of the present invention. On the basis of the above-described embodiment, referring to fig. 10 and 11, the first support layer 1 includes the first support portion 14 and the second support portion 15, the first support portion 14 and the second support portion 15 are symmetrically disposed, and the thickness of the first support portion 14 is gradually reduced and the thickness of the second support portion 15 is gradually increased in the direction along the first side D1 to the second side D2; preferably, the first support portion 14 and the second support portion 15 are adjacent to an intermediate position of the first support layer 1.
Specifically, the first support layer 1 may include a support portion 13, where the support portion 13 includes a first support surface 131 adjacent to the second support layer 2, a second support surface 132 disposed opposite to the first support surface 131, and a first side surface 133 adjacent to the first support surface 131 and the second support surface 132, respectively; the first side 133 is located on the first side D1 or the second side D2 of the first support layer 1; in the region between the first side D1 and the second side D2 of the first support layer 1, the first support surface 131 and the second support surface 132 adjoin the third side 134. Alternatively, fig. 12 is a schematic structural diagram of yet another flexible support layer provided by 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 support 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, which can enable the position of the first supporting layer 1 near the first side edge D1 or the second side edge D2, where the material of the first supporting layer 1 is thicker, and because 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 is better improved, the flatness of the flexible display panel when the flexible display panel is unfolded 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 side 134, and the first support surface 131 slopes down to overlap the second support surface 132. This arrangement makes the transition of the support portion 13 relatively uniform, which is advantageous in 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, and the first supporting surface 131 and the second supporting surface 132 may be 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 bonded, so that the supporting portion 13 may be conveniently formed into a whole layer structure, and mechanical strength and structural stability of the first supporting layer 1 may be improved.
Optionally, fig. 13 is a schematic structural diagram of yet another flexible supporting layer according to 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. Referring to fig. 13 and 14, the supporting part 13 may include a first supporting part 14 and a second supporting part 15, the first side 133 of the first supporting part 14 being located at the first side D1, the first supporting surface 131 of the first supporting part 14 extending from the first side D1 to the second side D2; the first side 133 of the second supporting portion 15 is located at the second side 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 side 134 of the first support 14 onto the second support layer 2 coincides with or is offset from the orthographic projection of the third side of the second support 15 onto the second support layer 2. Alternatively, fig. 15 is a top view of a support portion of a first support layer of another flexible support layer provided by an embodiment of the present invention. In combination with fig. 12 and 15, the orthographic projection of the second side 135 of the first support 14 onto the second support layer 2 coincides with the orthographic projection of the second side 135 of the second support 15 onto the second support layer 2.
Specifically, referring to fig. 13 and 14, 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, so that the first supporting portion 14 starts at the first side D1. The first side 133 of the second supporting portion 15 is located on 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 of the flexible display panel are easy to curl when the flexible display panel is unfolded can be further solved. The orthographic projection of the third side 134 of the first support portion 14 on the second support layer 2 may be overlapped or staggered with the orthographic projection of the third side of the second support portion 15 on the second support layer 2 according to need, and fig. 13 and 14 exemplarily illustrate the case where the orthographic projection of the third side 134 of the first support portion 14 on the second support layer 2 is staggered with the orthographic projection of the third side of the second support portion 15 on the second support layer 2, which is not limited herein.
Preferably, the first support portion 14 and the second support portion 15 are adjacent to an intermediate position of the first support layer 1. With reference to fig. 12 and 15, the orthographic projection of the second side 135 of the first support portion 14 on the second support layer 2 coincides with the orthographic projection of the second side 135 of the second support portion 15 on the second support layer 2, so that the first support portion 14 and the second support portion 15 can be integrally manufactured, and the mechanical strength of the first support 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-described embodiments, referring to fig. 16, the first support layer 1 and/or the second support layer 2 comprises an elastic pad or an elastic gel; when the first support layer 1 includes an elastic pad, the flexible support layer 100 further includes: and a second adhesive layer 3, the second adhesive layer 3 being disposed between the first support layer 1 and the flexible display panel 200.
In particular, the first support layer 1 comprises a high density elastic pad or gel. The second support layer 2 comprises a low density elastic pad or gel. Because the elastic pad is a flexible pad, the elastic pad has no viscosity, and the second bonding layer 3 with smaller density is arranged on one side of the first supporting layer 1 far away from the second supporting layer 2, and the viscosity of the second bonding layer 3 is larger than that of the elastic pad, so that the first supporting layer 1 is attached to the flexible display panel through the second bonding layer 3. The material of the second adhesive layer 3 may include PSA glue, and the thickness of the second adhesive layer 3 is less than or equal to 5um. The density of the second adhesive layer 3 may be set to be smaller than that of the first support layer 1, and the viscosity of the second adhesive layer 3 is greater 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 needed, and is not limited in any way 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 preparation method of the flexible display module provided by the invention includes:
s101, providing a flexible display panel.
S102, manufacturing a flexible supporting layer on the non-light-emitting side of the flexible display panel; wherein, in the curling direction parallel to the flexible display panel, the flexible supporting layer is provided with a first side edge and a second side edge which are oppositely arranged; the flexible supporting layer, still include: the first supporting layer gradually reduces the thickness of the first supporting layer to a certain thickness along the direction from the first side edge to the middle of the first supporting layer; and/or, gradually reducing the thickness of the first supporting layer to a certain thickness along the direction from the second side edge to the middle of the first supporting 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 another method for manufacturing a flexible display module according to an embodiment of the present invention. On the basis of the above embodiment, referring to fig. 18, the preparation method of the flexible display module provided by the invention includes:
s101, providing a flexible display panel.
S201, forming a first concave surface on one side of the first support layer 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, and manufacturing 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 of the first supporting layer far away from the flexible display panel; 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, a flexible display device 400 provided by the present invention includes a flexible display module 300 according to any of the above embodiments. The beneficial effects of the flexible display module 200 provided by any of the embodiments are not described herein.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. 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, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (11)
1. The flexible display module is characterized by comprising 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 and a second side which are oppositely arranged in a curling direction parallel to the flexible display panel;
the flexible support layer further comprises:
the first support layer gradually reduces the thickness of the first support layer to a certain thickness along the direction from the first side edge to the middle of the first support layer; and/or, the thickness of the first supporting layer gradually decreases to a certain thickness along the direction from the second side edge to the middle of the first supporting 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 according to claim 1, wherein,
a first concave surface is formed on one side, far away from the flexible display panel, of the first supporting layer, and a first plane is formed on one side, close to the flexible display panel, of the first supporting layer.
3. A flexible display module according to claim 2, wherein,
a second plane is formed on one side, far away from the first support layer, of the second 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.
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 includes a first support portion and a second support portion, the first support portion and the second support portion being symmetrically disposed, the thickness of the first support portion gradually decreasing and the thickness of the second support portion gradually increasing in a direction along the first side to the second side.
6. The flexible display module according to claim 5, wherein,
the first support part and the second support part are adjacent to the middle position of the first support layer.
7. 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 gel;
when the first support layer includes the elastic pad, the flexible support layer further includes:
and the second adhesive layer is arranged between the first supporting layer and the flexible display panel.
8. The flexible display module according to claim 7, wherein,
the thickness of the second supporting layer is less than or equal to 25um;
the thickness of the first bonding layer is less than or equal to 5um;
the thickness of the second bonding layer is less than or equal to 5um.
9. The preparation method of the flexible display module is characterized by comprising the following steps of:
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 oppositely disposed first and second sides in a crimping direction parallel to the flexible display panel; the flexible support layer further comprises: the first support layer gradually reduces the thickness of the first support layer to a certain thickness along the direction from the first side edge to the middle of the first support layer; and/or, the thickness of the first supporting layer gradually decreases to a certain thickness along the direction from the second side edge to the middle of the first supporting 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.
10. The method for manufacturing a flexible display module according to claim 9, 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 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, which is close to the flexible display panel.
11. A flexible display device comprising the flexible display module of any one of claims 1-8.
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| CN114973963A (en) * | 2022-06-16 | 2022-08-30 | 昆山国显光电有限公司 | Rollable display module and rollable display device |
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