CN113870704B - Display device - Google Patents
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- CN113870704B CN113870704B CN202111136480.0A CN202111136480A CN113870704B CN 113870704 B CN113870704 B CN 113870704B CN 202111136480 A CN202111136480 A CN 202111136480A CN 113870704 B CN113870704 B CN 113870704B
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
An embodiment of the present application provides a display device including: the first functional layer, the first adhesive layer and the second functional layer; the second functional layer comprises an auxiliary functional layer, the auxiliary functional layer comprises a first subsection and a second subsection, the first subsection comprises at least one thinning area, the thickness of the thinning area in the first direction is smaller than that of the second subsection in the first direction, and the first direction is perpendicular to the plane of the first functional layer; wherein at least part of the edge of the orthographic projection of the first glue layer in the first direction is positioned in the orthographic projection of the first subsection in the first direction. The deformation of first glue film can be improved to this application, and then can improve the bubble that appears between first functional layer and the second functional layer that first glue film deformation led to and influence display device's life, consequently this application can improve display device's life.
Description
Technical Field
The application relates to the technical field of display equipment, in particular to a display device.
Background
With the continuous development of technology, the display area of the display device is increasingly required. In order to increase the display area of the display device, scroll screens and folding screens are in operation. Among them, a folding display device is favored and expected by virtue of its capability of providing a large display area while being convenient to store in a folded state and in an unfolded state. The folding display device comprises a display panel and a cover plate, wherein the display panel and the cover plate are bonded through glue materials, and the glue materials are easy to deform due to the fact that the folding display device needs to deform reciprocally, so that air bubbles and other defects appear between the display panel and the cover plate, and the service life of the display device is seriously influenced.
Disclosure of Invention
The embodiment of the application provides a display device, and aims to improve the service life of the display device.
An embodiment of a first aspect of the present application provides a display device including: the first functional layer, the first adhesive layer and the second functional layer; the second functional layer comprises an auxiliary functional layer, the auxiliary functional layer comprises a first subsection and a second subsection, the first subsection comprises at least one thinning area, the thickness of the thinning area in the first direction is smaller than that of the second subsection in the first direction, and the first direction is perpendicular to the plane of the first functional layer; wherein at least part of the edge of the orthographic projection of the first glue layer in the first direction is positioned in the orthographic projection of the first subsection in the first direction.
In the display device provided by the embodiment of the application, the display device comprises a first functional layer, a second functional layer and a glue layer positioned between the first functional layer and the second functional layer. The auxiliary functional layer of the second functional layer comprises a first subsection and a second subsection, the first subsection is provided with a thinning area, the thickness of the thinning area is smaller, therefore, the structural strength of the thinning area is smaller, the thinning area is easy to deform, namely, the first subsection is easy to deform. The partial edge of the orthographic projection of the first adhesive layer in the first direction is positioned within the orthographic projection of the first subsection, that is, the partial edge of the first adhesive layer and the first subsection are overlapped along the first direction. When the edge of the first adhesive layer receives the acting force towards the second functional layer, the first subsection can deform to absorb the acting force, so that the acting force received by the first adhesive layer can be reduced, and the deformation of the first adhesive layer is improved. Therefore, the thickness of the thinning part with smaller thickness is arranged at the first subsection, deformation of the first adhesive layer can be improved, and then the service life of the display device can be influenced by bubbles appearing between the first functional layer and the second functional layer caused by deformation of the first adhesive layer. Therefore, the service life of the display device can be prolonged.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.
Fig. 1 is a schematic view of a structure of a display device in the related art.
Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present application;
FIG. 3 is a cross-sectional view at A-A in FIG. 2;
FIG. 4 is a force analysis diagram of a display device according to an embodiment of the present disclosure;
FIG. 5 is a cross-sectional view at A-A of FIG. 2 in another embodiment of the present application;
FIG. 6 is a cross-sectional view at A-A in FIG. 2 provided in accordance with yet another embodiment of the present application;
fig. 7 is a schematic structural diagram of a first adhesive layer of a display device according to another embodiment of the present disclosure;
FIG. 8 is a schematic view of a partial enlarged structure at I in FIG. 3;
FIG. 9 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 10 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 11 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 12 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 13 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 14 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 15 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
FIG. 16 is a schematic view of a partial enlarged structure at I in FIG. 3 in another embodiment;
fig. 17 is a partially enlarged schematic view of the structure at I in fig. 3 in another embodiment.
Reference numerals illustrate:
100. a display device;
10. a first functional layer; 11. a cover plate; 12. a protective film;
20. a first adhesive layer; 21. a first side; 22. a second side;
30. a second functional layer; 31. an auxiliary functional layer; 301. a groove; 301a, a first groove; 301b, a second groove; 302. a hollowed-out part; 31a, thinning areas; 310. a first subsection; 311. a first section; 311a, a first surface; 312. a second section; 312a, a second surface; 320. a second subsection; 330. a filling part; 32. a display panel; 33. a buffer layer; 34. a substrate; 35. a support film; 36. a polarizer;
40. a force application assembly;
AB. A bending region; NAB, non-inflection region; n, a first axis; p, the first central line.
Detailed Description
Features and exemplary embodiments of various aspects of the present application are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing an example of the present application. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to the related art. The display device comprises a support film, and a display structure layer 01, a polaroid 02, an optical adhesive layer 03 and a cover plate 04 which are sequentially arranged on the support film. In fig. 1, in order to better illustrate the stress of the optical cement layer 03, the optical cement layer 03 and the polarizer 02 are spaced apart. In the bending display device, since the cover plate 04 is bent, the size of the optical adhesive layer 03 is smaller than the size of the cover plate 04 and the size of the polarizer 03 on both sides of the display device along the bending axis, which results in the optical adhesive layer 03 being concave with respect to the cover plate 04 and the polarizer 02.
The inventors found that when the cover plate 04 is forced by the force application member 40 'such as a roller so that the cover plate 04 and the polarizer 02 are attached to each other, the edge of the optical adhesive layer 03 is forced more as indicated by an arrow on the force application member 40' in fig. 1. And as indicated by the solid arrows in fig. 1, this force will create a force from the edge of the optical cement layer 03 towards the inside of the optical cement layer 03, so that the optical cement layer 03 will be deformed by being pressed from both sides towards the middle. After the cover plate 04 and the polaroid 02 are attached, the optical adhesive layer 03 which is extruded and deformed can rebound and deform, so that bubbles appear between the cover plate 04 and the polaroid 02, and the service life of the display device is seriously influenced due to poor attachment of the cover plate 04 and the polaroid 02.
The present application is proposed to solve the above technical problems. For a better understanding of the present application, the display device of the embodiment of the present application will be described in detail with reference to fig. 2 to 17.
Referring to fig. 2 and fig. 3 together, fig. 2 is a schematic structural diagram of a display device 100 according to an embodiment of the present application, and fig. 3 is a cross-sectional view at A-A in fig. 2.
As shown in fig. 2 and 3, the display device 100 provided in the embodiment of the present application includes: a first functional layer 10, a first adhesive layer 20, a second functional layer 30; the second functional layer 30 comprises an auxiliary functional layer 31, the auxiliary functional layer 31 comprises a first subsection 310 and a second subsection 320, the first subsection 310 comprises at least one thinned region 31a, and the thickness of the thinned region 31a in a first direction X is smaller than the thickness of the second subsection 320 in the first direction X, and the first direction X is perpendicular to the plane of the first functional layer 10; wherein at least a portion of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first subsection 310 in the first direction X.
The thickness of the thinned region 31a in the first direction X being smaller than the thickness of the second subsection 320 in the first direction X means that: the thinned region 31a is located at a position where the material thickness is smaller than that of the second subsection 320. For example, the first section 310 may be grooved in the thinned region 31a such that the thickness of the thinned region 31a is less than the thickness of the second section 320, i.e., the outer surface of the first section 310 can observe that the thickness of the thinned region 31a is less than the thickness of the second section 320; or the inside of the first section 310 may be hollow such that the thickness of the thinned region 31a is smaller than the thickness of the second section 320, it is not possible to observe from the outer surface of the first section 310 that the thickness of the thinned region 31a is smaller than the thickness of the second section 320, as long as the thickness of the material at the position where the thinned region 31a is located is smaller than the thickness of the material of the second section 320.
Only the auxiliary functional layer 31 and the first adhesive layer 20 of the first functional layer 10 and the second functional layer 30 are schematically shown in fig. 3. Optionally, other film layers may be disposed between the auxiliary functional layer 31 and the first adhesive layer 20. Alternatively, the first glue layer 20 may be an optical glue layer.
In the display device 100 provided in the embodiment of the present application, the display device 100 includes the first functional layer 10, the second functional layer 30, and the first adhesive layer 20 located between the first functional layer 10 and the second functional layer 30. The auxiliary functional layer 31 of the second functional layer 30 includes a first portion 310 and a second portion 320, where the first portion 310 has a thinned region 31a, and the thinned region 31a has a smaller thickness, so that the thinned region 31a has a smaller structural strength, and the thinned region 31a is easy to deform, i.e., the first portion 310 is easy to deform and can absorb part of bending stress. The part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first subsection 310, i.e. the part of the edge of the first glue layer 20 and the first subsection 310 are arranged overlapping in the first direction X.
Fig. 4 is a force analysis diagram of a display device according to an embodiment of the present application, and fig. 4 shows a deformed state of the first section 310 according to an embodiment. When the edge of the first glue layer 20 is subjected to a force towards the second functional layer 30, a part of the deformable space may be provided for deformation to absorb the force due to the thinning of the first subsection 310. Therefore, when the first subsection 310 deforms, the stress of the first adhesive layer 20 can be reduced, and then the deformation of the first adhesive layer 20 can be improved, so that the service life of the display device 100 is affected by air bubbles between the first functional layer 10 and the second functional layer 30 caused by the deformation of the first adhesive layer 20.
Optionally, at least part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first functional layer 10 in the first direction X. I.e. at least part of the edge of the first glue layer 20 is recessed with respect to the first functional layer 10. As shown in fig. 1, the display device 100 has a first center line P extending along the second direction Y, and at least a portion of the edge of the first adhesive layer 20 is concave relative to the first functional layer 10: at least part of the edge of the first glue layer 20 is located on the side of the edge of the first functional layer 10 facing the first centre line P. When first glue film 20 and first functional layer 10 mutually paste, even if the laminating error appears, also can guarantee that first glue film 20 and first functional layer 10 laminate, avoid first glue film 20 to stretch out outside first functional layer 10, simultaneously, when display device is in under the bending state, first glue film also probably receives bending stress effect and is pulled to the adhesion is on adjacent rete, consequently set up between first glue film and the rete of adjacent to have the difference of fracture, can prevent under the bending state first glue film adhesion on other retes.
Referring to fig. 5, fig. 5 is a cross-sectional view at A-A in fig. 2 according to another embodiment of the present application.
As shown in fig. 5, optionally, the second functional layer 30 further includes a display panel 32, where the display panel 32 is located between the auxiliary functional layer 31 and the first adhesive layer 20, that is, the first adhesive layer 20 is disposed between the display panel 32 and the first functional layer 10, and the display panel 32 is adhered to the first functional layer 10 through the first adhesive layer 20; at least a portion of an edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the display panel 32 in the first direction X. I.e. at least part of the edge of the first glue layer 20 is recessed with respect to the display panel 32, at least part of the edge of the first glue layer 20 being located at the side of the edge of the display panel 32 facing the first centre line P. Similarly, when the first adhesive layer 20 and the display panel 32 are mutually bonded, even if bonding errors occur, bonding between the first adhesive layer 20 and the display panel 32 can be ensured, the first adhesive layer 20 is prevented from extending out of the display panel 32, and in addition, the first adhesive layer is prevented from being adhered to other film layers when the display device is in a bending state.
Referring to fig. 6, fig. 6 is a cross-sectional view at A-A in fig. 2 according to yet another embodiment of the present application.
As shown in fig. 6, in some alternative embodiments, the display device 100 further includes: a buffer layer 33 located at a side of the display panel 32 facing away from the second functional layer 30; a substrate 34 located on a side of the buffer layer 33 facing away from the display panel 32; and a support film 35 on a side of the substrate 34 facing away from the display panel 32. Wherein the support film 35, the substrate 34, the support film 35, and the display panel 32 are bonded to each other by an adhesive layer. The auxiliary functional layer 31 may include at least one of a buffer layer 33, a substrate 34, and a support film 35. Fig. 6 of the present application exemplifies the auxiliary functional layer 31 as the support film 35.
As shown in fig. 6, in some alternative embodiments, the display device 100 further includes: a cover plate 11 positioned on a side of the display panel 32 facing away from the first functional layer 10; the protective film 12 is positioned on one side of the cover plate 11 away from the display panel 32, and the first functional layer 10 includes at least one of the cover plate 11 and the protective film 12. The first functional layer 10 is taken as a cover plate 11 for illustration. The cover plate 11 and the protective film 12 are bonded to each other by an optical adhesive layer. The material of the cover plate 11 may for example comprise a flexible glass material, the thickness of the cover plate 11 being for example less than or equal to 100 μm. The flexible glass material has better toughness, higher structural strength and better flatness and transparency, so that the cover plate 11 has good protection performance and can realize folding of the display device.
In some alternative embodiments, as shown in fig. 6, a polarizer 36 is further disposed on a side of the display panel 32 facing away from the auxiliary functional layer 31, and the first adhesive layer 20 may be disposed between the polarizer 36 and the cover plate 11. The polarizer 36 includes at least one of a PVA film, a TAC film, a protective film, a release film, and a pressure-sensitive adhesive layer, and the polarizer 36 is used to change a light emitting direction.
Optionally, as above, at least part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the first functional layer 10 in the first direction X, i.e. at least part of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the cover plate 11 in the first direction X, and the first glue layer 20 is concave with respect to the cover plate 11. At least a portion of the edge of the orthographic projection of the first glue layer 20 in the first direction X is located within the orthographic projection of the polarizer 36 in the first direction X, and the first glue layer 20 is concave with respect to the polarizer 36.
In the display device 100 provided in this embodiment, in the process of using the force application assembly 40 such as the roller to make the cover plate 11 and the polarizer 36 mutually adhere through the first adhesive layer 20, when the force application assembly 40 is located at a position far from the edge of the first adhesive layer 20, the second portion 320 on the supporting film 35 has a higher structural strength, so that the second portion 320 cannot be deformed, and the supporting film 35 can provide a better supporting effect. As the force application assembly 40 gradually approaches the edge of the first glue line 20, since at least a portion of the edge of the cover plate 11 is located outside of the first glue line 20 away from the first center line P, the cover plate 11 provides a downward and centrally sloped force to the first glue line 20 as indicated by the arrow in fig. 6. At this time, the first portion 310 of the supporting film 35 can deform downward to absorb a part of the force due to the thinned area 31a, so as to reduce the stress of the first adhesive layer 20. Further, since the support film 35 and the substrate 34 are bonded to each other by the adhesive layer, which is generally a flexible layer, even if the support film 35 is slightly deformed, the adhesive layer can compensate for the deformation on the support film 35 without causing the support film 35 and the substrate 34 to separate from each other. The first subsection 310 can reduce the stress of the first adhesive layer 20 when deformed, so as to improve the deformation of the first adhesive layer 20, and improve the bubbles between the first functional layer 10 and the second functional layer 30 caused by the deformation of the first adhesive layer 20 to affect the service life of the display device 100, so that the service life of the display device 100 can be prolonged.
Referring to fig. 6 and fig. 7 together, fig. 7 is a schematic structural diagram of the first adhesive layer 20 of the display device 100 according to another embodiment of the present disclosure. The location of the thinned region 31a shown in fig. 6 is schematically shown in fig. 7 by a broken line, which does not constitute a structural limitation of the first adhesive layer 20.
Optionally, in some alternative implementations, as shown in fig. 6 and 7, the display device 100 includes a bending region AB and a non-bending region NAB, where the non-bending region NAB is located at two opposite sides of the bending region AB in a second direction Y, which is parallel to the plane of the first functional layer 10; the first glue layer 20 comprises two first sides 21 opposite in a second direction Y and two second sides 22 opposite in a third direction Z parallel to the plane of the first functional layer 10 and intersecting the second direction Y; the orthographic projection of the second side 22 in the first direction X is located within the orthographic projection of the first subsection 310 in the first direction X. Optionally, the second direction Y and the third direction Z are perpendicular to each other.
In these alternative embodiments, when the first adhesive layer 20 is attached to the polarizer 36, attachment of the first adhesive layer 20 to the outside of the polarizer 36 can be avoided even if an attachment error occurs. When the cover plate 11 is attached to the first adhesive layer 20, even if an attaching error occurs, the first adhesive layer 20 can be prevented from being exposed from the cover plate 11.
When the second side 22 is subjected to a force directed toward the second functional layer 30, the first portion 310 can absorb at least a portion of the force by deformation, so as to reduce the stress of the first side 21, further reduce the deformation of the first side 21, and improve the air bubbles generated between the cover plate 11 and the polarizer 36 due to the deformation of the first adhesive layer 20, thereby affecting the service life of the display device 100.
Optionally, with continued reference to fig. 6, the edge of the orthographic projection of the second side 22 in the first direction X is located within the orthographic projection of the cover 11 in the first direction X, the orthographic projection of the polarizer 36 in the first direction X, and the orthographic projection of the first segment 310 in the first direction X.
In these alternative embodiments, on the one hand, second side 22 is recessed relative to cover plate 11 and polarizer 36, and first adhesive layer 20 does not protrude beyond cover plate 11 or polarizer 36. On the other hand, in the process of attaching the cover plate 11 and the polarizer 36 by using the first adhesive layer 20, when the force application component 40 such as a roller moves from one side of the cover plate 11 to the other side of the cover plate 11, the second side 22 receives a force towards the polarizer 36, and the force is reduced under the deformation action of the first subsection 310, so that the force applied to the first adhesive layer 20 can be reduced, the deformation of the first adhesive layer 20 is improved, and then the service life of the display device 100 is affected due to the air bubbles between the cover plate 11 and the polarizer 36 caused by the deformation of the first adhesive layer 20.
With reference to fig. 6 and 7, the thinned area 31a includes a groove 301 located on a side of the first portion 310 facing away from the display panel 32, where the groove 301 extends in the third direction Z and at least penetrates the bending area AB. The arrangement of the recess 301 is schematically indicated in fig. 7 by a dashed line. It can be understood that the grooves at least penetrate through the bending region because the side edges of the first adhesive layer extend from one non-bending region to the other non-bending region along the bending region, and the grooves are arranged corresponding to the side edges of the first adhesive layer and at least absorb bending stress born by the first adhesive layer on the bending region, so that the grooves at least penetrate through the bending region to reduce the stress born by the first adhesive layer.
Optionally, referring to fig. 3 to 6, the opening direction of the groove 301 faces away from the first adhesive layer 20, so that the flatness of the surface of the first portion 310 facing the display panel 32 can be ensured, and the first portion 310 is prevented from rubbing the display panel 32 to affect the service life of the display panel 32. In addition, the opening direction of the groove 301 faces away from the first adhesive layer 20, so that the first adhesive layer 20 can be prevented from flowing into the groove 301 to affect the deformability of the first subsection 310 when the first adhesive layer 20 is prepared in the process flow. The opening direction of the groove 301 facing away from the first adhesive layer 20 can also be that the first subsection 310 is attached to a film layer located thereon, for example, the surface of the first subsection 310 facing the display panel 32 can be attached to the display panel 32 better, and can deform in time and absorb the stress of the first adhesive layer 20.
Referring to fig. 8, fig. 8 is a schematic diagram of a partial enlarged structure at I in fig. 3.
As shown in fig. 8, in some alternative embodiments, at least one first subsection 310: the first and second sections 311 and 312 (shown in brackets in fig. 8) are sequentially distributed along the third direction Z, the orthographic projection of the first section 311 in the first direction X is located within the orthographic projection of the first adhesive layer 20 in the first direction X, and the orthographic projection of the second section 312 in the first direction X and the orthographic projection of the first adhesive layer 20 in the first direction X are arranged in a staggered manner.
In these alternative embodiments, the first section 311 and the first glue layer 20 are arranged overlapping in the first direction X, and the second section 312 and the first glue layer 20 are arranged offset in the first direction X, i.e. the first subsection 310 is of a larger size, such that the edge of the first glue layer 20 orthographic projection in the first direction X can be located within the orthographic projection of the first subsection 310 in the first direction X. When the force application assembly 40, such as a roller, is positioned proximate to the edge of the first glue layer 20 such that the cover 11 provides a downward oblique force to the first glue layer 20, the first sections 310 deform to reduce the force applied to the first glue layer 20. After the force application assembly 40 passes the edge of the first adhesive layer 20, the first portion 310 can still absorb the force applied to the first adhesive layer 20, so as to reduce the force applied near the edge of the first adhesive layer 20 and further improve the deformation of the first adhesive layer 20.
Optionally, the second sections 320 are provided with first sections 310 on both sides in the third direction Z, and each first section 310 is provided corresponding to each second side 22. Optionally, the two first sections 310 are arranged in the same way.
Referring to fig. 9, fig. 9 is a schematic diagram of a partial enlarged structure at I in fig. 3 according to another embodiment.
As shown in fig. 9, alternatively, the orthographic projection of the second side 22 along the first direction X is the first axis N, and the thickness of the first portion 310 gradually increases to two sides along the first axis N. That is, the thinned area 31a of the first subsection 310 has an inverted V shape, and the thickness of the first section 311 gradually decreases and the thickness of the second section 312 gradually increases along the direction from the first section 311 to the second section 312; the thickness of the second section 312 gradually decreases and the thickness of the first section 311 gradually increases in the direction from the second section 312 to the first section 311.
In these alternative embodiments, the first axis N of the first section 310 increases gradually in thickness in the direction of both sides thereof, i.e. the first section 310 has the smallest thickness at the location of the first axis N and the highest deformability. The first axis N overlaps the second side 22 along the first direction X. When the force application assembly 40 applies force to the first adhesive layer 20, the stress at the second side edge 22 is the greatest, and the deformation capability of the first subsection 310 corresponding to the position of the second side edge 22 is the strongest, so that the stress of the second side edge 22 can be absorbed better, and the deformation of the first adhesive layer 20 can be improved better.
Referring to fig. 10, fig. 10 is a schematic diagram of a partial enlarged structure at I in fig. 3 according to another embodiment.
As shown in fig. 10, in some alternative embodiments, the first section 311 includes a first surface 311a facing the groove 301, and the second section 312 includes a second surface 312a facing the groove 301; the display device 100 has a reference plane parallel to the plane of the display panel 32, where the first surface 311a and the second surface 312a intersect, and an included angle b between the first surface 311a and the reference plane is greater than an included angle a between the second surface 312a and the reference plane.
In these alternative embodiments, the angle b between the first surface 311a and the reference surface is greater than the angle a between the second surface 312a and the reference surface, i.e. the thickness of the first section 311 in the first direction X where the first surface 311a is located at a symmetrical position about the first axis N is greater than the thickness of the second section 312 where the second surface 312a is located. When the force application assembly 40 applies a force to the first adhesive layer 20, the cover 11 applies a greater force to the second side 22 during the approach of the second side 22 due to the concave shape of the second side 22. And as the force application assembly 40 passes over the second side 22, the force applied to the first adhesive layer 20 gradually decreases as the second section 312 has been deformed to absorb some of the force. The first section 311 is thicker, so that the deformation of the first section 311 can be reduced, the stress of the first adhesive layer 20 is more balanced, and the supporting capability of the first section 311 can be improved.
Referring to fig. 11, fig. 11 is a schematic diagram illustrating a partial enlarged structure at I in fig. 3 according to another embodiment.
As shown in fig. 11, optionally, the single first section 310 includes a plurality of grooves 301, the plurality of grooves 301 being spaced apart in the third direction Z. The grooves 301 can reduce the thickness of the first portion 310, improve the deformability of the first portion 310, and enable the first portion 310 to deform at different positions in the third direction Z due to the plurality of grooves 301 distributed at intervals.
Referring to fig. 12, fig. 12 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.
In some alternative embodiments, as shown in fig. 12, the groove 301 in the first section 311 is a first groove 301a, the groove 301 in the second section 312 is a second groove 301b, and the total area of the first groove 301a is smaller than the total area of the second groove 301 b. The area of the grooves 301 refers to the orthographic projection dimension of the openings of the grooves 301 in the first direction X, the total area of the first grooves 301a refers to the total area of the plurality of grooves 301 in the first section 311, and the total area of the second grooves 301b refers to the total area of the plurality of grooves 301 in the second section 312.
In these alternative embodiments, the total area of the first grooves 301a is less than the total area of the second grooves 301b, and therefore the deformability of the first section 311 is less than the deformability of the second section 312. As described above, when the force application member 40 applies a force to the first adhesive layer 20, the cover plate 11 applies a larger force to the second side 22 during the approach of the second side 22 due to the concave shape of the second side 22. And as the force application assembly 40 passes over the second side 22, the force applied to the first adhesive layer 20 gradually decreases as the second section 312 has been deformed to absorb some of the force. The total area of the first grooves 301a is smaller, so that the deformation of the first section 311 can be reduced, the stress of the first adhesive layer 20 is more balanced, and the supporting capability of the first section 311 can be improved.
In addition, the first section 311 and the second section 312 each include a plurality of grooves 301, and the plurality of grooves 301 can disperse bending stress, so as to improve toughness of the first subsection 310 and improve fracture caused by overstress or excessive deformation of the first subsection 310.
In some alternative embodiments, referring still to FIG. 12, in a single first subsection 310: in the first section 311, the interval between adjacent two first grooves 301a gradually decreases in the direction in which the first section 311 points to the second section 312. I.e. in the direction of the first section 311 pointing towards the second section 312, the distance between two adjacent first grooves 301a near the above-mentioned first axis N gradually decreases, and the deformability of the first section 311 gradually increases. I.e. the deformation capacity of the first section 311 is stronger closer to the second side 22, the stress of the second side 22 can be better absorbed, and the deformation of the first adhesive layer 20 can be better improved.
Alternatively, among the plurality of first grooves 301a described above, the plurality of first grooves 301a may be the same or different in size. Among the plurality of second grooves 301b described above, the plurality of second grooves 301b may be the same or different in size. Alternatively, in order to reduce the difficulty of manufacturing the display device 100, the plurality of first grooves 301a are the same in size, and the plurality of second grooves 301b are the same in size.
Referring to fig. 13, fig. 13 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.
As shown in fig. 13, the thickness of the first portion 310 at the position where the first groove 301a is located is greater than the thickness of the first portion 310 at the position where the second groove 301b is located. The deformability of the first section 311 is thus smaller than the deformability of the second section 312. As described above, when the force application member 40 applies a force to the first adhesive layer 20, the cover plate 11 applies a larger force to the second side 22 during the approach of the second side 22 due to the concave shape of the second side 22. And as the force application assembly 40 passes over the second side 22, the force applied to the first adhesive layer 20 gradually decreases as the second section 312 has been deformed to absorb some of the force. The total area of the first grooves 301a is smaller, so that the deformation of the first section 311 can be reduced, the stress of the first adhesive layer 20 is more balanced, and the supporting capability of the first section 311 can be improved.
Referring to fig. 14, fig. 14 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.
In some alternative embodiments, as shown in fig. 14, the second functional layer 30 further includes a filling portion 330, where the filling portion 330 is located in the groove 301, and a surface of the filling portion 330 facing away from the display panel 32 is coplanar with a surface of the second subsection 320 facing away from the display panel 32, and an elastic modulus of the filling portion 330 is smaller than an elastic modulus of the second subsection 320.
In these alternative embodiments, the filling portion 330 is filled in the groove 301, and the surface of the filling portion 330 is flush with the surface of the second portion 320, so that the flatness of the surface of the auxiliary functional layer 31 can be improved, and the risk of rubbing on other components in the display device 100 due to the uneven surface of the auxiliary functional layer 31 is improved. The elastic modulus of the filling portion 330 is smaller than that of the second portion 320, so that the first portion 310 is easily deformed.
Referring to fig. 15, fig. 15 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.
In alternative embodiments, as shown in fig. 15, the thinned region 31a includes a hollowed out portion 302 within the first section 310. That is, by providing the first part 310 in a hollow form to reduce the elastic modulus of the first part 310, it is possible to secure the flatness of the surface of the auxiliary function layer 31 by providing the hollow inside the first part 310.
In some alternative embodiments, referring to fig. 15, the size of the hollowed-out portion 302 gradually decreases to two sides on the first axis N. That is, the total thickness of the first sections 310 gradually increases from the first axis N to both sides, the structural strength of the first sections 310 gradually increases, and the deformation capability of the first sections 310 is strongest at the position of the first axis N. The first axis N and the second side 22 are overlapped along the first direction X, when the force application component 40 applies a force to the first adhesive layer 20, the second side 22 is stressed the most, and the first subsection 310 has the strongest deformability corresponding to the second side 22, so that the stress of the second side 22 can be absorbed better, and the deformation of the first adhesive layer 20 can be improved better.
Referring to fig. 16, fig. 16 is a schematic view of a partial enlarged structure at I in fig. 3 according to another embodiment.
In other alternative embodiments, as shown in fig. 16, a plurality of the hollowed-out portions 302 are distributed at intervals in the first subsection 310, and the number of the distributed hollowed-out portions 302 gradually decreases in the direction of the first axis N toward two sides. I.e. the first section 310 is at the position of the first axis N where the total thickness is smallest and the deformability of the first section 310 is strongest. The first portion 310 has the strongest deformability corresponding to the second side 22, and can better absorb the stress of the second side 22 and better improve the deformation of the first adhesive layer 20.
Referring to fig. 17, fig. 17 is a schematic diagram of a partial enlarged structure at I in fig. 3 according to another embodiment.
As shown in fig. 17, in some alternative embodiments, the second functional layer 30 further includes a filling portion 330, where the filling portion 330 is located on the hollowed-out portion 302; the modulus of elasticity of the filling portion 330 is smaller than the modulus of elasticity of the second subsection 320. The hollow portion 302 is filled with the filling portion 330, and the elastic modulus of the filling portion 330 is smaller than that of the second portion 320, so that the first portion 310 is easier to deform relative to the second portion 320, and the first portion 310 can absorb the stress of the second side 22 through deformation.
While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (15)
1. A display device comprising:
the first functional layer, the first adhesive layer and the second functional layer;
the first functional layer includes at least one of a cover plate and a protective film;
the second functional layer comprises an auxiliary functional layer, the auxiliary functional layer comprises a first subsection and a second subsection, the first subsection comprises at least one thinning area, the thickness of the thinning area in the first direction is smaller than that of the second subsection in the first direction, and the first direction is perpendicular to the plane of the first functional layer;
wherein at least a portion of an edge of the orthographic projection of the first glue layer in the first direction is located within the orthographic projection of the first subsection in the first direction;
at least part of the edge of the orthographic projection of the first adhesive layer in the first direction is positioned in the orthographic projection of the first functional layer in the first direction;
the thinning area comprises a groove positioned on one side of the first subsection, which is opposite to the display panel.
2. The display device of claim 1, wherein the second functional layer further comprises a display panel, the display panel being located between the auxiliary functional layer and the first glue layer;
at least part of the edge of the orthographic projection of the first adhesive layer in the first direction is positioned inside the orthographic projection of the display panel in the first direction.
3. The display device of claim 2, wherein the display device comprises a inflection region and a non-inflection region, the non-inflection region being located on opposite sides of the inflection region in a second direction, the second direction being parallel to a plane in which the first functional layer is located;
the first adhesive layer comprises two first side edges opposite to each other in the second direction and two second side edges opposite to each other in a third direction, and the third direction is parallel to the plane of the first functional layer and is intersected with the second direction;
an orthographic projection of the second side in the first direction is located within an orthographic projection of the first section in the first direction.
4. A display device according to claim 3, wherein,
the groove extends in the third direction and at least penetrates through the bending area.
5. The display device of claim 4, wherein an opening direction of the recess faces away from the first glue layer.
6. The display device of claim 4, wherein the display device comprises a display panel,
at least one of said first subdivisions:
the first section and the second section are distributed along the third direction in sequence, the orthographic projection of the first section in the first direction is located in the orthographic projection of the first adhesive layer in the first direction, and the orthographic projection of the second section in the first direction and the orthographic projection of the first adhesive layer in the first direction are arranged in a staggered mode.
7. The display device of claim 6, wherein the display device comprises a display device,
along the first direction, the orthographic projection of the second side edge is a first axis, and the thickness of the first subsection gradually increases to two sides on the first axis.
8. The display device of claim 7, wherein the display device comprises a display device,
the first section includes a first surface facing the groove, and the second section includes a second surface facing the groove;
the display device is provided with a reference surface parallel to the plane where the display panel is located, and the included angle between the first surface and the reference surface is larger than the included angle between the second surface and the reference surface.
9. The display device of claim 6, wherein the display device comprises a display device,
the single first subsection comprises a plurality of grooves which are distributed at intervals in the third direction.
10. The display device according to claim 6 or 9, wherein,
the grooves in the first section are first grooves, the grooves in the second section are second grooves, and the total area of the first grooves is smaller than that of the second grooves.
11. The display device of claim 10, wherein the display device comprises a display device,
in a single said first subsection:
in the second section, the distance between two adjacent second grooves gradually decreases along the direction that the second section points to the first section;
and/or in the first section, the distance between two adjacent first grooves gradually decreases along the direction that the first section points to the second section.
12. The display device of claim 4, wherein the second functional layer further comprises a filling portion, the filling portion is located in the groove, a surface of the filling portion facing away from the display panel is coplanar with a surface of the second portion facing away from the display panel, and an elastic modulus of the filling portion is smaller than an elastic modulus of the second portion.
13. The display device of claim 1, wherein the thinned region includes a hollowed-out portion inside the first section.
14. The display device of claim 13, wherein the display device comprises a display device,
the display device comprises a bending region and a non-bending region, wherein the non-bending region is positioned at two opposite sides of the bending region in a second direction, and the second direction is parallel to the plane of the first functional layer;
the first adhesive layer comprises two first side edges opposite to each other in the second direction and two second side edges opposite to each other in a third direction, and the third direction is parallel to the plane of the first functional layer and is intersected with the second direction;
the orthographic projection of the second side edge in the first direction is positioned inside the orthographic projection of the first subsection in the first direction;
an orthographic projection of the second side edge along the first direction is a first axis;
the size of the hollowed-out part is gradually reduced towards two sides on the first axis; or, the plurality of hollowed-out parts are distributed in the first subsection at intervals, and the distribution number of the hollowed-out parts is gradually reduced in the direction from the first axis to two sides.
15. The display device according to claim 13, wherein the second functional layer further comprises a filling portion, the filling portion being located in the hollowed-out portion; the modulus of elasticity of the filling part is smaller than the modulus of elasticity of the second subsection.
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| CN114495719A (en) * | 2022-01-27 | 2022-05-13 | 武汉天马微电子有限公司 | Display device |
| CN115148102B (en) * | 2022-06-23 | 2023-11-24 | 合肥维信诺科技有限公司 | Screen support piece and display module |
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| CN109764041B (en) * | 2019-03-22 | 2021-03-02 | 京东方科技集团股份有限公司 | Jig for bonding, bonding equipment and bonding method of display panel and cover plate |
| CN110853496B (en) * | 2019-10-09 | 2022-04-22 | 华为技术有限公司 | Display screen assembly and mobile terminal |
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