CN118155510A - Display module and display device - Google Patents
Display module and display device Download PDFInfo
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- CN118155510A CN118155510A CN202410408077.6A CN202410408077A CN118155510A CN 118155510 A CN118155510 A CN 118155510A CN 202410408077 A CN202410408077 A CN 202410408077A CN 118155510 A CN118155510 A CN 118155510A
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- out area
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- display module
- bending
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- 239000010410 layer Substances 0.000 claims abstract description 140
- 238000005452 bending Methods 0.000 claims abstract description 123
- 239000012790 adhesive layer Substances 0.000 claims abstract description 114
- 239000000463 material Substances 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- 239000004917 carbon fiber Substances 0.000 claims description 2
- 239000003365 glass fiber Substances 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 14
- 239000000853 adhesive Substances 0.000 abstract description 11
- 230000008961 swelling Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 19
- 238000010586 diagram Methods 0.000 description 18
- 239000011241 protective layer Substances 0.000 description 10
- 239000000758 substrate Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 206010042674 Swelling Diseases 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
- G09F9/335—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 being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the application provides a display module and a display device. The display module assembly includes bending region and straight region, and this display module assembly still includes supporting layer and adhesive linkage, and the adhesive linkage sets up in bending region at least partially, and this supporting layer is including corresponding the fretwork region and the non-fretwork region that set up in bending region. The hollow area comprises a main hollow area and a secondary hollow area, the secondary hollow area is covered by the adhesive layer, and the boundary of one side of the adhesive layer, which is close to the main hollow area, is positioned at the corresponding position between the main hollow area and the secondary hollow area. When bending, the hollowed-out area can effectively reduce the stress of the inside of the bonding layer, and prevent the bonding layer from swelling and excessive shrinkage, so that the bending performance of the display module is improved.
Description
Technical Field
The present disclosure relates to display panels, and particularly to a display module and a display device.
Background
Along with the development of display panel preparation technology, people put forward higher requirements on display effects and comprehensive performances of display panels and display devices.
Flexible Organic Light Emitting Diode (OLED) display technology has gradually become a mainstream technology for new generation display applications due to the characteristics of excellent response speed, high color gamut, low power consumption, light weight, and the like. In particular, the application of small-sized OLED technology has been deepened in recent years, and the application field of flexible OLEDs has been further deepened. For flexible and foldable OLED products, such as flexible folding mobile phones, the size of the mobile phone is reduced through flexible folding, so that the mobile phone is convenient to carry. However, in the flexible folding products prepared in the prior art, as each flexible folding product has a certain film thickness, each film is bonded by bonding adhesive, after the flexible folding products are folded for many times, the bonding adhesive between each film is easy to degumm and swell under the action of bending force, especially at the bending area of the flexible folding panel, when a user uses the flexible folding panel, the corresponding flexible screen in the area is swelled and uneven, so that the user experience is affected, and the performance of the product is reduced. And is unfavorable for further improving the comprehensive performance of the flexible display product.
In summary, after the existing flexible folding panel is bent for many times, in the bending area, the problem of bulge and unevenness easily occurs between the film layers in the panel, so that the quality and the comprehensive performance of the flexible folding panel are reduced.
Disclosure of Invention
The embodiment of the invention provides a display module and a display device, which are used for effectively improving the problems that after a flexible display panel is folded for many times, bulges and unevenness easily occur between film layers at a bending area and effectively improving the comprehensive performance of the display panel.
In order to solve the above technical problems, an embodiment of the present invention provides a display module and a display device, where the display module includes: including bending region and setting are in the flat region of bending region at least one side, the display module assembly includes:
A support layer; and
The bonding layer is arranged on the supporting layer, and at least part of the bonding layer is arranged in the bending area;
The support layer comprises a hollowed-out area which is correspondingly arranged in the bending area and a non-hollowed-out area which is arranged on one side of the hollowed-out area;
The hollow-out area comprises a main hollow-out area and a secondary hollow-out area arranged on at least one side of the main hollow-out area, the bonding layer covers the secondary hollow-out area, and the boundary of the bonding layer, which is close to one side of the main hollow-out area, is located between the main hollow-out area and the secondary hollow-out area.
According to an embodiment of the present invention, the auxiliary hollow-out area includes at least one first auxiliary hollow-out area and at least one second auxiliary hollow-out area;
the first auxiliary hollowed-out area and the second auxiliary hollowed-out area are symmetrically arranged relative to the main hollowed-out area, and the main hollowed-out area is correspondingly arranged in the middle of the bending area.
According to an embodiment of the present invention, the bonding layer completely covers the first auxiliary hollow area and the second auxiliary hollow area, a space is further provided at the main hollow area of the bonding layer, and orthographic projection of the bonding layer on the supporting layer is not overlapped with the main hollow area.
According to an embodiment of the present invention, the width of the space is greater than the width of the main hollow area.
According to an embodiment of the present invention, a distance from one side edge of the main hollow area to the edge of the adhesive layer on the same side is the same as a distance from the other side edge of the main hollow area to the edge of the adhesive layer on the same side.
According to one embodiment of the present invention, the distance between the edge of one side of the main hollow area and the edge of the adhesive layer on the same side is set to be 0.3mm-1.6mm.
According to an embodiment of the present invention, the spacing distance between the adhesive layers is 1mm-2mm greater than the width value of the main hollowed-out area.
According to an embodiment of the present invention, the central axis of the main hollow area is parallel to or coincides with the bending central axis of the bending area.
According to an embodiment of the present invention, the width of the main hollowed-out area is greater than the width of the first auxiliary hollowed-out area, and the width of the main hollowed-out area is greater than the width of the second auxiliary hollowed-out area.
According to an embodiment of the present invention, a distance between the first auxiliary hollowed-out area and an edge of one side of the bending area is greater than a distance between the first auxiliary hollowed-out area and the main hollowed-out area.
According to an embodiment of the present invention, the main hollow area and the auxiliary hollow area are arranged at intervals, and the hollow area includes a plurality of hollow patterns;
The length direction of the hollowed-out pattern is parallel to the central line of the bending area.
According to an embodiment of the present invention, the supporting layer further includes at least one opening;
The opening penetrates through the edge of the supporting layer corresponding to the bending area.
According to an embodiment of the present invention, at a side of the bending area near the opening, a length of the hollowed-out pattern is greater than a length of the hollowed-out pattern in a middle portion of the bending area.
According to an embodiment of the present invention, the density of the hollowed-out pattern corresponding to the main hollowed-out area is greater than the density of the hollowed-out pattern corresponding to the auxiliary hollowed-out area.
According to an embodiment of the present invention, the display module further includes a back plate, and the back plate is disposed on the adhesive layer.
According to an embodiment of the present invention, the thickness of the supporting layer is set to 70um-200um.
According to a second aspect of an embodiment of the present application, there is also provided a display device including: the display module provided by the embodiment of the application.
The embodiment of the application has the beneficial effects that: compared with the prior art, the embodiment of the application provides a display module and a display device. The display module assembly includes bending region and straight region, and simultaneously, this display module assembly still includes supporting layer and adhesive linkage, and this adhesive linkage sets up on the supporting layer, and the adhesive linkage sets up in bending region at least partially, and this supporting layer is including corresponding the fretwork region and the non-fretwork region that set up in bending region. The hollow-out area comprises a main hollow-out area and at least one auxiliary hollow-out area, the auxiliary hollow-out area is at least partially covered by the bonding layer, and the bonding layer is not overlapped with the main hollow-out area. In the embodiment of the application, the main hollow area and the auxiliary hollow area are arranged in the bending area, and the bonding layer is arranged above the corresponding hollow area. When the display module is bent, the bending performance of the main hollow area and the auxiliary hollow area can be effectively improved. Meanwhile, due to the fact that orthographic projection of the bonding layer on the supporting layer is not overlapped with the main hollow area, the main hollow area does not act on the bonding layer during bending, and tensile or compressive stress cannot be formed on the bonding layer, so that deformation matching degree between the bonding layer and the supporting layer during deformation is effectively guaranteed, the problem that the bonding layer bulges and contracts and transits is prevented, and bending performance of the display module is effectively improved.
Drawings
In order to more clearly illustrate the embodiments or the technical solutions in the prior art, the following description will briefly introduce the drawings that are required to be used in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a flexible panel according to the prior art;
fig. 2 is a schematic diagram of a film structure of a display module according to an embodiment of the present application;
FIG. 3 is a schematic view of a supporting layer according to an embodiment of the present application;
FIG. 4 is a schematic structural diagram of the supporting layer according to an embodiment of the present application;
Fig. 5 is a cross-sectional view of a display module according to the embodiment of the application shown in fig. 2;
FIG. 6 is a schematic diagram showing a relationship between a distance from an edge of a first adhesive layer to an edge of a main hollow area and stress inside the adhesive layer according to an embodiment of the present application;
Fig. 7A is a schematic structural diagram of a display panel after bending according to an embodiment of the present application;
FIG. 7B is a schematic diagram of the adhesive layer in the display film layer after being bent under stress and an enlarged effect diagram thereof;
fig. 8 is a schematic diagram of a film structure of a display device according to an embodiment of the present application.
Detailed Description
The following disclosure provides various embodiments or examples of implementing various features of the invention in conjunction with the accompanying drawings in the examples of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. In addition, the examples of the various specific processes and materials provided herein are those of ordinary skill in the art and will recognize other process applications. All other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
With the continuous development of display panel manufacturing technology, people put forward higher requirements on the performance and display effect of display panels and display devices.
Particularly for bendable devices, the quality of the bending performance of the device directly determines the use feeling of the user. As shown in fig. 1, fig. 1 is a schematic structural diagram of a flexible panel provided in the prior art. The flexible display panel includes a protective layer 100, a first substrate 101, an adhesive layer 102, and a back plate 103.
The first substrate 101 is disposed on the protective layer 100, and the adhesive layer 102 is disposed on the first substrate 101. In the prior art, the protective layer 100 is generally configured as a flexible film layer to protect the flexible panel, and the first substrate 101 may be a supporting layer, such as a metal supporting layer, so as to support and fix the panel through the first substrate 101. Meanwhile, the back plate 103 is disposed on the adhesive layer 102. The substrate and the back plate are bonded by the adhesive layer 102. The display panel further comprises a bending region 104 and a flat region 105. When the display panel is bent, the bending region 104 is bent, and the corresponding film layer in the bending region is also bent. In the prior art, the adhesive layer 102 is generally broken to improve bending performance, as shown in fig. 1. However, after the display panel is bent for many times, the adhesive layer is easy to be debonded at the edge of the bending area, and causes the problem of bubbles, thereby reducing the bending performance of the flexible panel.
The embodiment of the application provides a display module and a display device, which are used for effectively solving the problems that the film layer in the flexible panel is easy to be debonded and bubble is easy to occur, and effectively improving the bending performance of the flexible display panel.
Fig. 2 is a schematic diagram of a film structure of a display module according to an embodiment of the application, as shown in fig. 2. The display module includes a support layer 200, an adhesive layer 102, and a back plate 103. In particular, the support layer 200 may be disposed at a side of the light exiting from the display panel. Through the support layer 200 to perform a supporting and fixing function. Meanwhile, the adhesive layer 102 is disposed on the support layer 200, the back plate 103 is disposed on the adhesive layer 102, and the support layer 200 and the back plate 103 are adhered and fixed by the adhesive layer 102.
In the embodiment of the present application, the structures of the supporting layer 200 and the back plate 103 are only examples, and the supporting layer 200 and the back plate 103 mainly play roles of supporting, bending and fixing the film layers. Thus, the supporting layer 200 and the back plate 103 may be made of a film material with a certain rigidity and bending property. In practical production, the supporting layer 200 is usually made of an alloy material, and specifically, the alloy material may be an alloy steel plate or a high-strength steel sheet containing manganese. In the embodiment of the present application, the support layer 200 is preferably a high-strength steel sheet containing manganese. When a high-strength steel sheet is selected, the steel sheet has a single-body yield strength limit of not less than 1600MPa and good toughness. Meanwhile, the material of the back plate 103 is usually a rigid material, such as ultra-thin glass. Alternatively, the back plate 103 may be replaced by other materials with a certain rigidity according to the requirements of the actual product, which will not be described herein.
Further, the display module further includes a bending region 104 and a flat region 105. Wherein the flat region 105 is disposed on at least one side of the bending region 104. In the embodiment of the present application, the flat regions 105 are disposed at corresponding positions on both sides of the bending region 104. When the display module is bent, bending can occur at the center of the bending region 104, so that the straight regions 105 at the two sides relatively move, and finally the straight regions 105 at the two sides are mutually attached, thereby realizing bending of the flexible module.
In the embodiment of the present application, when the adhesive layer 102 is disposed, the adhesive layer 102 is disposed in the flat region 105, and the adhesive layer 102 is at least partially disposed in the bending region 104, and when the adhesive layer 102 is bent in the bending region 104, the adhesive layer 102 is bent and deformed.
Further, the adhesive layer 102 is broken in the bending region 104, such as a space H between the adhesive layers 102 at two sides of the bending region 104. In an embodiment of the present application, the width of the interval H may be smaller than the width of the bending region 104.
Further, in the embodiment of the present application, when the supporting layer 200 is disposed, the supporting layer 200 may include a plurality of hollow areas 2002 and a plurality of non-hollow areas 2001 in the bending area 104 of the display module. Specifically, the hollowed-out area 2002 can be disposed at one side of the non-hollowed-out area 2001, and at the same time, the non-hollowed-out area 2001 separates two adjacent hollowed-out areas 2002. When the display panel is bent in the bending area, the material in the hollowed area is removed, so that the display panel is easier to bend when bending stress is applied to the display panel. Therefore, in the embodiment of the application, the hollow area 2002 is provided to effectively improve the bending performance of the module.
As shown in fig. 3, fig. 3 is a schematic structural diagram of a support layer 200 according to an embodiment of the application. In the embodiment of the present application, the supporting layer 200 corresponding to the bending region 104 is taken as an example.
In the embodiment of the present application, in the bending area, the supporting layer 200 includes a hollowed-out area and a non-hollowed-out area. Specifically, the hollow area may include a main hollow area FA2 and a sub hollow area disposed at least on one side of the main hollow area FA 2.
The auxiliary hollowed-out area is exemplified by a first auxiliary hollowed-out area FA1 and a second auxiliary hollowed-out area FA 3. Preferably, the number of the main hollow area FA2 and the corresponding auxiliary hollow area may be plural, and in the embodiment of the present application, only one main hollow area FA2 and two auxiliary hollow areas are taken as an example for illustration.
The first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA3 are respectively disposed at two sides of the main hollowed-out area FA 2. Preferably, the first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA3 may be symmetrically arranged with respect to the main hollowed-out area FA 2. When the display module is bent, if a good bending effect is obtained, such as a folding effect of forming a water drop screen after folding, in the embodiment of the application, the first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA3 are symmetrically arranged relative to the main hollowed-out area FA2, so that when the display module is bent, the first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA3 are ensured to have a consistent deformation effect, and the bending performance of the display module is effectively ensured.
Meanwhile, in order to ensure that the bending region 104 has better performance when bending, in the embodiment of the present application, the main hollow region FA2, the first auxiliary hollow region FA1 and the second auxiliary hollow region FA3 may be symmetrically disposed with respect to the center line OO' of the bending region 104. In this way, the main hollow area FA2 is directly disposed at a position corresponding to the middle portion of the bending area 104.
Specifically, in the embodiment of the present application, the width of the main hollowed-out area FA2 may be greater than the widths of the first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA3, and the widths of the first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA3 may be the same. Further, a first non-hollowed-out area FB2 is arranged between the edge of the first auxiliary hollowed-out area FA1 and the edge of the main hollowed-out area FA2, the width corresponding to the first non-hollowed-out area FB2 is a, a second non-hollowed-out area FB3 is arranged between the edge of the second auxiliary hollowed-out area FA3 and the edge of the main hollowed-out area FA2, and the width corresponding to the second non-hollowed-out area FB3 is b.
In the embodiment of the application, the width a corresponding to the first non-hollowed-out area FB2 can be the same as the width b corresponding to the second non-hollowed-out area FB3, and the symmetry of the two side structures is ensured by setting the widths corresponding to the two different non-hollowed-out areas to be the same width, so that when the display module is bent, the bending consistency of the display module is ensured, and the bending effect of the display module is improved.
Further, a third non-hollowed-out area FB1 is correspondingly disposed between the edge of the first auxiliary hollowed-out area FA1 and the edge of the bending area, and a fourth non-hollowed-out area FB4 is correspondingly disposed between the edge of the second auxiliary hollowed-out area FA3 and the edge of the other side of the bending area, wherein the widths of the third non-hollowed-out area FB1 and the fourth non-hollowed-out area FB4 are the same.
Thus, in the embodiment of the present application, 7 different regions are sequentially disposed and formed in the bending region 104: the third non-hollowed-out area FB1, the first auxiliary hollowed-out area FA1, the first non-hollowed-out area FB2, the main hollowed-out area FA2, the second non-hollowed-out area FB3, the second auxiliary hollowed-out area FA3 and the fourth non-hollowed-out area FB4. When setting, the above hollowed-out areas and non-hollowed-out areas can be set to other numbers according to the width of the corresponding bending area 104, which is not described herein. In the embodiment of the application, the plurality of different hollowed-out areas are arranged in the bending area, so that the bending stress required by the film layer during bending can be effectively reduced by the plurality of hollowed-out areas, and the bending effect and performance of the film layer are effectively improved.
Specifically, the central axis of the main hollow area FA2 may be parallel to or overlap with the bending central axis OO' of the bending area, so as to ensure symmetry in the bending process.
Meanwhile, the distance between the first auxiliary hollowed-out area FA1 and the edge of one side of the bending area on the same side is larger than the distance between the first auxiliary hollowed-out area FA1 and the main hollowed-out area FA 2.
Specifically, the widths of the first non-hollow-out area FB2 and the second non-hollow-out area FB3 may be set to 1mm-2mm. Preferably, 1.5mm is set.
In the embodiment of the present application, when the supporting layer is disposed, a plurality of hollowed-out patterns 333 are disposed in each hollowed-out area. Specifically, the hollowed pattern 333 may be a plurality of hollowed strips. The hollow strip can be in a strip shape, a round shape, an oval shape, a square shape, a wave shape and other structures. In the embodiment of the application, a hollow bar structure is taken as an example for explanation.
Further, the hollow structure can be set into other shapes, and through the hollow structure arranged on the supporting layer, the film material at the hollow structure is removed, and when the film material is stressed and bent, the bending stress in the film is reduced, so that the bending performance and the bending effect of the supporting layer are improved. Further, other identical or similar structures are within the scope of the present application, and will not be described herein.
Specifically, when the hollow bar structures in different hollow areas are set, the arrangement density of the hollow bars in the main hollow area FA2 may be greater than the arrangement density in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA 3. Therefore, more hollowed-out strips can be arranged in the main hollowed-out area FA2, and in the auxiliary hollowed-out area, the number of the hollowed-out strips is relatively small, and when the main hollowed-out area FA2 is bent, the main hollowed-out area FA2 can be bent under small force, so that the bending performance of the display panel is effectively improved.
Preferably, the density of the hollow bars arranged in the main hollow area FA2 is twice or more than twice the density of the hollow bars arranged in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA 3. The corresponding membrane layer in the area is provided with more hollowed-out strips, and when the membrane layer is bent, the supporting layer can be bent under the action of small stress, so that the bending performance of the supporting layer is improved.
Further, when the corresponding hollow strips in the main hollow area FA2 are provided, the hollow area of each hollow strip in the main hollow area may be larger than the hollow area of each hollow strip in the auxiliary hollow area. Specifically, the width of the hollowed-out strips in the main hollowed-out area FA2 is greater than the widths of the hollowed-out strips in the first auxiliary hollowed-out area FA1 and the second auxiliary hollowed-out area FA 3. When bending this supporting layer, because the fretwork area in the main fretwork district in center is bigger, it takes place crookedly more easily to effectually improved the crooked effect of display panel.
Further, in the embodiment of the present application, when the corresponding hollow structures in the main hollow area and the auxiliary hollow area are provided, the hollow shape corresponding to the hollow structure in the main hollow area may be the same as or different from the hollow shape corresponding to the hollow structure in the auxiliary hollow area. If the hollow structures in the main hollow area and the auxiliary hollow area are all set to be hollow bar structures, or the hollow structures in the main hollow area are set to be hollow bar structures, and the hollow structures in the auxiliary hollow area are set to be circular or wave structures. The bending performance of the supporting layer is improved by arranging the hollow structure. Meanwhile, in the auxiliary hollowed-out area, the shapes of the hollowed-out structures in the plurality of different auxiliary hollowed-out areas can be the same or different. Specifically, in the auxiliary hollow areas on two sides of the main hollow area, the auxiliary hollow areas on two sides are symmetrically arranged relative to the main hollow area, for example, hollow structures in the first auxiliary hollow area FA1 and the second auxiliary hollow area FA3 are all arranged to be hollow bar structures, so that the two sides of the supporting layer are guaranteed to have consistent bending effect and good bending performance.
Further, in the embodiment of the present application, the width of the main hollowed-out area FA2 is set to 15mm-18mm, and the widths of the auxiliary hollowed-out areas on both sides are set to 7mm-9mm respectively. Preferably, the width of the main hollow area FA2 is set to 16mm, and the width of the auxiliary hollow areas on both sides is set to 8mm.
Fig. 4 is a schematic structural diagram of the supporting layer according to an embodiment of the application, as shown in fig. 4. In the embodiment of the present application, when each hollow area is provided, in order to further improve the bending performance of the display module, the support layer further includes at least one opening 444.
Wherein the openings 444 are disposed at the intersection of each hollowed-out strip and the edge of the supporting layer. By arranging a plurality of openings at the side edges of the supporting layer, the openings penetrate through the edges of the supporting layer corresponding to the bending areas. When the supporting layer is bent, the opening is disconnected and no film layer is connected, so that the edge of the supporting layer is easier to bend, and the bending performance of the supporting layer during bending is further improved.
Further, each opening 444 may be formed by a hollowed-out strip, and when each opening 444 is formed, the opening 444 may be a partial hollowed-out area of the hollowed-out strip, and the width between two adjacent openings 444 may be the same.
Further, when the opening 444 and the hollow bar structure corresponding to the main hollow area FA2 of the supporting layer are provided, in the two side edge areas 446 near the supporting layer, the two side edge areas 446 may be near one side of the opening 444, and the length of the hollow bar at the edge area may be greater than the length value of the corresponding hollow bar in the middle area of the supporting layer. Like this, in edge, the length grow of every fretwork strip corresponds fretwork region, and the material of the supporting layer that the fretwork was got rid of is more, when buckling it, can further reduce required bending stress, and then improves the bending property of this supporting layer.
Fig. 5 is a cross-sectional view of the display module according to the embodiment of the application shown in fig. 2. In combination with the film structure of fig. 2. In the embodiment of the application, when the display module is disposed, the adhesive layer 102 is correspondingly disposed on the supporting layer 200, and the adhesive layer 102 is at least partially disposed in the bending region 104.
Specifically, in the embodiment of the present application, the adhesive layer 102 may include a first adhesive layer 1021 and a second adhesive layer 1022. The first adhesive layer 1021 and the second adhesive layer 1022 are both arranged on the supporting layer 200, and the first adhesive layer 1021 and the second adhesive layer 1022 are disconnected at a position at least above the main hollow area FA 2. And the first adhesive layer 1021 and the second adhesive layer 1022 are at least partially disposed within the inflection region 104.
Preferably, the bonding layer covers the auxiliary hollow area, and the boundary of one side of the bonding layer, which is close to the main hollow area, is located at a corresponding position between the main hollow area and the auxiliary hollow area. In the following embodiment, the first auxiliary hollowed-out area FA1 is completely covered by the first adhesive layer 1021, and the second auxiliary hollowed-out area FA3 is completely covered by the second adhesive layer 1022. The first adhesive layer 1021 extends to the first non-hollowed-out area FB2, and the second adhesive layer 1022 extends to the second sub-hollowed-out area FA3.
Further, in the embodiment of the present application, the projection of the adhesive layer 102 on the supporting layer 200 does not overlap with the main hollow area FA 2. Specifically, the first adhesive layer 1021 does not overlap the main hollow area FA2, and the second adhesive layer 1022 does not overlap the main hollow area FA 2. In the embodiment of the application, the lengths of the first adhesive layer 1021 and the second adhesive layer 1022 are controlled, so that the adhesive effect of the first adhesive layer 1021 and the second adhesive layer 1022 on different film layers is ensured, and the stress formed in the adhesive layer is ensured, thereby effectively improving the adhesive effect of the adhesive layer and the comprehensive performance of the module.
Specifically, in the embodiment of the present application, the first adhesive layer 1021 and the second adhesive layer 1022 are symmetrically disposed with respect to the main hollow area FA2, and in the description below, only the positional relationship of one side is described, and the other side has the same structure, which is not repeated.
The first adhesive layer 1021 and the second adhesive layer 1022 have a distance H, so that the distance from the first adhesive layer 1021 to the center of the main hollow area FA2 is H/2. Referring to fig. 5, the distance between the edge of the first adhesive layer 1021 near the center of the bending region and the edge of the main hollow region FA2 facing the first adhesive layer 1021 is L.
In the embodiment of the present application, the width of the interval H between the first adhesive layer 1021 and the second adhesive layer 1022 is greater than the width of the main hollowed-out area FA 2. And the first adhesive layer 1021 and the second adhesive layer 1022 do not overlap with the main hollow area FA 2.
In the embodiment of the present application, when the bending region is bent, the first adhesive layer 1021 and the second adhesive layer 1022 shrink inwards. In order to ensure the shrinking effect and effectively prevent the problems of degumming and air bubbles of the bonding layer after multiple bending. In the embodiment of the present application, the distance L between one side edge of the first adhesive layer 1021 and one side edge of the main hollow area FA2 is set to be 0.3mm-1.6mm. Preferably, the distance L is set to 0.6mm. In the embodiment of the application, the distance L is controlled to ensure the stress generated in the bonding layers at two sides when the bonding layers are bent, so as to ensure the reliability of the bonding layers.
As shown in fig. 6, fig. 6 is a schematic diagram illustrating a relationship between a distance from an edge of the first adhesive layer to an edge of the main hollowed-out area and stress inside the adhesive layer according to an embodiment of the present application. Wherein, the dotted line in the graph represents the critical stress value corresponding to the bonding layer. Wherein the critical stress value is 0.237Mpa. When the stress value in the bonding layer is larger than the critical stress value, the display panel is easy to break off and bulge.
As can be seen from the corresponding curve relationship in the figure, when the distance L is smaller than 0.3mm, a large stress is generated inside the first adhesive layer when the display panel is bent, and the stress exceeds the safety reference value. At this time, the adhesive layer is liable to bulge.
When the distance L is more than 0.6mm, the stress value received in the adhesive layer tends to be stable, and the risk of swelling and debonding of the adhesive layer is significantly reduced. Thus, in embodiments of the present application, the distance L may be greater than 0.3mm. Preferably 0.6mm. In the embodiment of the application, the distance L is set to be 0.6mm, so that the bonding layer is ensured to have a better bonding effect, and the bonding layer is also ensured to have a smaller stress effect when being bent, so that the bonding layer is prevented from being subject to debonding risks such as bulge and the like. And finally, the comprehensive performances such as the bending effect of the display panel are effectively improved.
Further, in the embodiment of the present application, when the adhesive layer 102 is provided, the thickness of the adhesive layer 102 is set to 10um-50um. In the embodiment of the application, the thickness of the adhesive layer 102 is set to 25um, so that the performance of the adhesive layer in bending and the adhesive effect thereof are effectively ensured.
Further, as shown in fig. 7A, fig. 7A is a schematic structural diagram of the display panel after bending. After the display panel 708 is bent, each film layer and the corresponding display module in the panel are bent or folded, and after the display panel 708 is bent, the size of the display panel 708 is reduced, and the display panel is convenient to carry. In the embodiment of the application, the display panel 708 deforms to a greater extent in the bending region 104 when bending, and the stress condition of the film layer at the intersection position of the bending region 104 and the flat region 105, such as the position corresponding to the extrusion region 733, is most complex, and each film layer at the region, such as the bonding layer, is subjected to a greater extrusion stress. Therefore, the adhesive layer corresponding to the pressed region 733 is likely to be deformed unevenly and easily released. After the display panel provided in the embodiment of the application is bent, the bonding layer in the extrusion area 733 can still keep good deformation, and the deformation problems such as debonding and bulge can not occur.
Meanwhile, as shown in fig. 7B, fig. 7B is a schematic simulation diagram and an enlarged effect diagram corresponding to the simulation diagram after the adhesive layer in the display film layer is bent under stress in the prior art. In combination with the panel structure in the prior art provided in fig. 1 and the bending schematic diagram of the corresponding display panel in fig. 7A, when the panel structure is bent, the adhesive layer 102 is pressed and deformed in the pressing area 733 between the first substrate 101 and the back plate 103 under the action of bending stress. In severe cases, the adhesive layer 102 is unevenly deformed in the pressing area 733, such as swelling and debonding, so as to affect the bending and bonding effects of the display panel. In the embodiment of the application, the bonding layer and the corresponding supporting layer are arranged according to the structure, when the bonding layer is bent, the bonding layer in the extrusion area 733 and other areas has better deformation effect, and the bulge and debonding can not occur in the extrusion area 733.
In the embodiment of the present application, the display module further includes a back plate 103, where the back plate 103 is disposed on the adhesive layer 102, and when the back plate 103 bends under the action of stress. Further, the display module further includes a protective layer 400. The protective layer 400 may be a flexible or rigid protective layer, such as a plastic protective film. The protection layer 400 is used to protect the supporting layer 200 and improve the quality and reliability of the display module.
Specifically, in the embodiment of the present application, the material of the adhesive layer 102 may be selected from transparent optical adhesive or other transparent polymer adhesive materials. The adhesive layer 102 has better recovery performance, and when the bending area is bent, the adhesive layer 102 arranged on the hollowed-out area can be partially compressed into the hollowed-out strip under the action of stress. After the stress is removed, the adhesive layer 102 is restored again. Thereby effectively improving the bending effect.
Further, the material of the supporting layer 200 in the embodiment of the present application may be any one of materials with a certain strength, bending performance and supporting performance, such as a high-strength steel sheet containing manganese, a titanium alloy material, a carbon fiber material, a glass fiber, an aluminum alloy, or a composite material of a plurality of materials, which will not be described herein.
Fig. 8 is a schematic diagram of a film structure of a display device according to an embodiment of the application. In an embodiment of the present application, the display device includes a bending region 104 and a flat region 105.
Meanwhile, the display device further comprises the following film layers which are sequentially laminated: protective layer 400, support layer 200 disposed on protective layer 400, adhesive layer 102 disposed on support layer 200, backsheet 103 disposed on adhesive layer 102, fifth adhesive layer 11 disposed on backsheet 103, light-emitting layer 21 disposed on fifth adhesive layer 11, fourth adhesive layer 31 disposed on light-emitting layer 21, polarizer 41 disposed on fourth adhesive layer 31, third adhesive layer 52 disposed on polarizer 41, ultra-thin glass layer 12 disposed on third adhesive layer 52, second adhesive layer 61 disposed on ultra-thin glass layer 12, first protective layer 71 disposed on second adhesive layer 61, first adhesive layer 81 disposed on first protective layer 71, and cover plate 91 disposed on first adhesive layer 81.
In the embodiment of the present application, the supporting layer 200, the adhesive layer 102 and the back plate 103 in the display device are disposed by adopting the structure provided in the embodiment of the present application. When the display device is bent, each film layer deforms under the action of stress, the bonding layers 102 in the display device are arranged on two sides of the bending area 104 in a segmented mode, when the display device is bent for many times, the bonding layers 102 still have good bonding performance at different positions, meanwhile, the display device cannot be debonded and swelled, and further the bending performance of the display device is effectively improved.
Further, the fifth adhesive layer 11, the fourth adhesive layer 31, the third adhesive layer 52, the second adhesive layer 61, and the first adhesive layer 81 in the display device may be the same adhesive material, such as the same optical adhesive. The thickness of each adhesive layer can be set according to practical situations, and will not be described here again.
In the embodiment of the application, the display module and the corresponding display device can be any bendable and foldable product or component such as a mobile phone, a computer, electronic paper, a display, a notebook computer, a digital photo frame and the like, and the specific type of the display module is not particularly limited.
In summary, the display module and the display device provided by the embodiments of the present invention have been described in detail, and specific examples are applied to illustrate the principles and the embodiments of the present invention, and the description of the above embodiments is only used to help understand the technical solution and the core idea of the present invention; although the present invention has been described with reference to the preferred embodiments, it should be understood that the invention is not limited to the particular embodiments described, but can be modified and altered by persons skilled in the art without departing from the spirit and scope of the invention.
Claims (19)
1. A display module assembly including a bending region and a flat region disposed on at least one side of the bending region, the display module assembly comprising:
A support layer; and
The bonding layer is arranged on the supporting layer, and at least part of the bonding layer is arranged in the bending area;
the support layer comprises a hollowed-out area correspondingly arranged in the bending area and a non-hollowed-out area which is arranged in the bending area and is positioned at one side of the hollowed-out area;
The hollow-out area comprises a main hollow-out area and an auxiliary hollow-out area arranged on at least one side of the main hollow-out area, the auxiliary hollow-out area is covered by the adhesive layer, the boundary of one side, close to the main hollow-out area, of the adhesive layer is located between the main hollow-out area and the auxiliary hollow-out area, and projection of the adhesive layer on the supporting layer is not overlapped with the main hollow-out area.
2. The display module of claim 1, wherein the secondary hollowed-out area comprises at least a first secondary hollowed-out area and at least a second secondary hollowed-out area;
the first auxiliary hollowed-out area and the second auxiliary hollowed-out area are symmetrically arranged relative to the main hollowed-out area, and the main hollowed-out area is correspondingly arranged in the middle of the bending area.
3. The display module assembly of claim 2, wherein the adhesive layer completely covers the first and second secondary hollowed-out areas, and the adhesive layer is broken at least at the primary hollowed-out area, and the adhesive layer is formed with a space at the primary hollowed-out area.
4. A display module according to claim 3, wherein the width of the space is greater than the width of the main hollowed-out area.
5. The display module of claim 4, wherein a distance from one side edge of the main hollowed-out area to the adhesive layer edge on the same side is the same as a distance from the other side edge of the main hollowed-out area to the adhesive layer edge on the same side.
6. The display module assembly of claim 5, wherein a distance between an edge of one side of the main hollowed-out area and an edge of the adhesive layer on the same side is set to be 0.3mm-1.6mm.
7. The display module assembly of claim 4, wherein the width of the gap is 1mm-2mm greater than the width of the main hollowed-out area.
8. The display module assembly of claim 2, wherein the central axis of the main hollowed-out area is parallel to or coincident with the bending central axis of the bending area.
9. The display module assembly of claim 2, wherein the width of the primary hollowed-out area is greater than the width of the first secondary hollowed-out area, and the width of the primary hollowed-out area is greater than the width of the second secondary hollowed-out area.
10. The display module assembly of claim 2, wherein a distance between the first secondary hollowed-out area and an edge of the bending area near the first secondary hollowed-out area is greater than a distance between the first secondary hollowed-out area and the main hollowed-out area.
11. The display module of claim 2, wherein a first non-hollowed-out area is provided between the first secondary hollowed-out area and the main hollowed-out area, and a second non-hollowed-out area is provided between the second secondary hollowed-out area and the main hollowed-out area;
The bonding layer comprises a first bonding layer and a second bonding layer which are arranged at intervals, the first bonding layer covers the first auxiliary hollowed-out area and extends to the first non-hollowed-out area, and the second bonding layer covers the second auxiliary hollowed-out area and extends to the second non-hollowed-out area.
12. The display module of claim 1, wherein the primary hollowed-out area and the secondary hollowed-out area are arranged at intervals, and the hollowed-out area comprises a plurality of hollowed-out patterns;
The length direction of the hollowed-out pattern is parallel to the central line of the bending area.
13. The display module of claim 12, wherein the support layer further comprises at least one opening;
The hollow pattern comprises a hollow strip, the length direction of the hollow strip is parallel to the central line of the bending area, the hollow strip is intersected with the edge of the supporting layer to form an opening, and the opening penetrates through the edge of the supporting layer corresponding to the hollow area.
14. The display module of claim 13, wherein the length of the hollowed-out pattern on a side of the bending region near the opening is greater than the length of the hollowed-out pattern in the middle of the bending region.
15. The display module of claim 12, wherein the density of the hollowed-out pattern corresponding to the main hollowed-out area is greater than the density of the hollowed-out pattern corresponding to the auxiliary hollowed-out area.
16. The display module assembly of claim 1, further comprising a light emitting layer and a back plate disposed on the adhesive layer, the light emitting layer disposed on a side of the back plate remote from the adhesive layer.
17. The display module of claim 1, wherein the thickness of the support layer is set to 70um-200um.
18. The display module of claim 1, wherein the material of the support layer comprises at least one of a manganese-containing steel plate, a titanium alloy material, a carbon fiber material, and glass fibers.
19. A display device comprising a display module according to any one of claims 1-18.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410408077.6A CN118155510A (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410408077.6A CN118155510A (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
| CN202211041733.0A CN115394197B (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211041733.0A Division CN115394197B (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
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| Publication Number | Publication Date |
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| CN118155510A true CN118155510A (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410408077.6A Pending CN118155510A (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
| CN202211041733.0A Active CN115394197B (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211041733.0A Active CN115394197B (en) | 2022-08-29 | 2022-08-29 | Display module and display device |
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| CN (2) | CN118155510A (en) |
| WO (1) | WO2024045495A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9983424B2 (en) * | 2015-06-08 | 2018-05-29 | Lg Display Co., Ltd. | Foldable display device |
| CN105690974B (en) * | 2016-01-21 | 2019-01-18 | 京东方科技集团股份有限公司 | Fexible film fitting and stripping means, flexible base board preparation method, underlay substrate |
| KR102405120B1 (en) * | 2016-09-29 | 2022-06-08 | 삼성디스플레이 주식회사 | Display apparatus and method for manufacturing the same |
| US20190363290A1 (en) * | 2017-03-30 | 2019-11-28 | Sharp Kabushiki Kaisha | Display device and production method of said display device |
| CN211604573U (en) * | 2020-05-07 | 2020-09-29 | 上海和辉光电股份有限公司 | Supporting and protecting device of folding screen and folding screen |
| CN111508370B (en) * | 2020-05-19 | 2023-01-24 | 武汉华星光电半导体显示技术有限公司 | Foldable display device |
| CN213342294U (en) * | 2020-09-08 | 2021-06-01 | Oppo广东移动通信有限公司 | Foldable electronic equipment and display module thereof |
| KR20220090038A (en) * | 2020-12-22 | 2022-06-29 | 엘지디스플레이 주식회사 | Foldable display device |
| CN112991953B (en) * | 2021-03-09 | 2022-08-05 | 武汉华星光电半导体显示技术有限公司 | Supporting plate and foldable display module |
| CN113129756B (en) * | 2021-04-21 | 2023-05-02 | 京东方科技集团股份有限公司 | Flexible supporting piece, manufacturing method thereof and display device |
| CN113724631B (en) * | 2021-09-02 | 2022-07-29 | 荣耀终端有限公司 | Supporting component, display module and electronic equipment |
| CN113990200B (en) * | 2021-11-18 | 2023-12-29 | 京东方科技集团股份有限公司 | Support module, preparation method of support module and preparation method of display device |
| CN114927063A (en) * | 2022-05-27 | 2022-08-19 | 武汉华星光电半导体显示技术有限公司 | Folding display device |
| CN114882797A (en) * | 2022-06-01 | 2022-08-09 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN114980494B (en) * | 2022-07-12 | 2024-04-02 | Oppo广东移动通信有限公司 | Flexible circuit board and foldable electronic equipment |
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- 2022-08-29 CN CN202410408077.6A patent/CN118155510A/en active Pending
- 2022-08-29 CN CN202211041733.0A patent/CN115394197B/en active Active
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2023
- 2023-02-09 WO PCT/CN2023/075203 patent/WO2024045495A1/en unknown
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| CN115394197A (en) | 2022-11-25 |
| WO2024045495A1 (en) | 2024-03-07 |
| CN115394197B (en) | 2024-03-08 |
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