A display device

Abstract

The application discloses a display device, comprising: a display panel, the display panel comprising: a display part, having opposite first and second surfaces, the first surface being a surface through which light exits the display panel; a bendable part and a binding part, the bendable part being located between the display part and the binding part, the binding part being bent to a side facing the second surface through the bendable part, a side surface of the binding part away from the display part being bound with a control chip; the second surface comprising a first area and a second area, a vertical projection of the binding part on the second surface being located in the first area; a composite tape, at least partially located between the display part and the binding part, the composite tape comprising a first film layer structure and a second film layer structure, the first film layer structure being adhesively fixed to the second surface; the second film layer structure comprising at least a first part; a vertical projection of the first part on the second surface being located in the first area, the first part being adhesively fixed to the first film layer structure and the binding part respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, more particularly, to a display device. BACKGROUND

[0002] With the development of science and technology, more and more display devices are widely used in people's daily life and work, which brings great convenience to people's daily life and work and becomes an important tool indispensable to people today. The main component of the display device to realize the display function is the display panel. In order to reduce the frame width of the display panel, the display panel generally folds the binding part with the control chip to the back of the display panel.

[0003] In the existing display device, a plurality of independent adhesive tapes are used to bond and fix the structural parts in the display panel, which leads to complex structure and manufacturing process of the display device, and further leads to high manufacturing cost of the product. SUMMARY

[0004] Therefore, the present application provides a display device, and the scheme is as follows:

[0005] A display device comprises:

[0006] The display panel comprises: a display part having opposite first and second surfaces, the first surface being the surface from which light exits the display panel; a bendable part and a binding part, the bendable part being located between the display part and the binding part, the binding part being bent to the side facing the second surface through the bendable part, and the side surface of the binding part away from the display part being bound with a control chip; the second surface comprises a first region and a second region, and the vertical projection of the binding part on the second surface is located in the first region;

[0007] The composite adhesive tape is at least partially located between the display part and the binding part, and comprises a first film layer structure and a second film layer structure, the first film layer structure being bonded and fixed with the second surface; the second film layer structure comprises at least a first part; the vertical projection of the first part on the second surface is located in the first region, and the first part is bonded and fixed with the first film layer structure and the binding part, respectively.

[0008] Based on the above description, it can be known that in the display device provided by the present application, the first film layer structure and the second film layer structure are different film layer structures in the same section of the composite adhesive tape, and only one section of the composite adhesive tape is needed to realize the covering protection of the second surface and the bonding and fixing of the relative region of the binding part and the display part, thereby simplifying the structure and manufacturing process of the display device and reducing the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0010] The structures, proportions, sizes, etc. shown in the drawings of the present specification are only used to cooperate with the content disclosed in the present specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0011] Figure 1 A cross-sectional view of a display device provided by an embodiment of the present application is shown in the drawing.

[0012] Figure 2 A cross-sectional view of a display panel in the display device shown in the drawing. Figure 1

[0013] Figure 3 A cross-sectional view of another display device provided by an embodiment of the present application is shown in the drawing.

[0014] Figure 4 A cross-sectional view of a first film layer structure provided by an embodiment of the present application is shown in the drawing.

[0015] Figure 5 A cross-sectional view of another first film layer structure provided by an embodiment of the present application is shown in the drawing.

[0016] Figure 6 A cross-sectional view of another display device provided by an embodiment of the present application is shown in the drawing.

[0017] Figure 7 A top view of a composite adhesive tape provided by an embodiment of the present application is shown in the drawing.

[0018] Figure 8 A cross-sectional view of the composite adhesive tape shown in the drawing in the A-A' direction. Figure 7

[0019] A top view of a second metal layer provided by an embodiment of the present application is shown in the drawing. Figure 9

[0020] A schematic view of a second film layer structure provided by an embodiment of the present application is shown in the drawing. Figure 10

[0021] Figure 11 ​​A partially enlarged view showing the bonding and fixing of the third part, the binding part, and the control chip in a second film structure provided in this application embodiment;

[0022] Figure 12 A partial side view of a third portion of a second membrane structure provided in an embodiment of this application;

[0023] Figure 13 This is a schematic diagram of the structure of another display device provided in an embodiment of this application;

[0024] Figure 14 A cross-sectional view of another display device provided in the embodiments of this application;

[0025] Figure 15 A cross-sectional view of another display device provided in the embodiments of this application;

[0026] Figure 16 for Figure 15 A cross-sectional view of the composite tape used in the display device shown.

[0027] Figure 17 A cross-sectional view of another display device provided in the embodiments of this application;

[0028] Figure 18 A top view of another composite tape provided in an embodiment of this application;

[0029] Figure 19 for Figure 18 The cross-sectional view of the composite tape shown is along the A-A' direction. Detailed Implementation

[0030] The embodiments of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Various modifications and variations can be made to this application without departing from its spirit or scope, which will be apparent to those skilled in the art. Therefore, this application is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the implementation methods provided in the embodiments of this application can be combined with each other without contradiction.

[0032] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Reference Figure 1 and Figure 2 as shown, Figure 1 is a cross-sectional view of a display device provided by an embodiment of the present application, Figure 2 is Figure 1 is a cross-sectional view of a display panel in the display device shown, the display device comprising:

[0034] The display panel 11 comprises a display portion 111, the display portion 111 having opposite first and second surfaces S1 and S2, the first surface S1 being the surface from which light is emitted by the display panel; a bendable portion 113 and a binding portion 112, the binding portion 112 being bent to the side facing the second surface S2 through the bendable portion 113, and the side surface of the binding portion 112 facing away from the display portion 111 being bound with a control chip 12; the second surface S2 comprising a first region Q1 and a second region Q2, the vertical projection of the binding portion 112 on the second surface S2 being located in the first region Q1.

[0035] The composite adhesive tape 13 is at least partially located between the display portion 111 and the binding portion 112, and comprises a first film layer structure 21 and a second film layer structure 22, the first film layer structure 21 being fixedly bonded to the second surface S2; the second film layer structure 22 comprising at least a first portion 221; the vertical projection of the first portion 221 on the second surface S2 being located in the first region Q1, and the first portion 221 being fixedly bonded to the first film layer structure 21 and the binding portion 112, respectively.

[0036] In a conventional display device, a first section of adhesive tape needs to be bonded to the second surface S2 of the display portion 111, at least for protecting the second surface S2 and supporting the structural members required to be provided on the second surface S2, such as circuit boards and under-screen cameras, etc.; a second section of adhesive tape needs to be provided between the binding portion 112 and the first section of adhesive tape, for fixedly bonding the binding portion 112.

[0037] It should be noted that, in the direction of the line connecting the first region Q1 to the second region Q2, the length of the second region Q2 is greater than the length of the first region Q1. In the cross-sectional view of the display panel 11 in the present embodiment, the length of the second region Q2 in this direction is not fully shown in order to more clearly show the film layer structure of the composite adhesive tape 13.

[0038] The first film layer structure 21 and the second film layer structure 22 are fixedly bonded at least at the portion opposite the first region Q1, and the first film layer structure 21 and the second film layer structure 22 can be fixedly bonded by an adhesive layer at this portion. Figure 1 The adhesive layer is not shown in the present embodiment.

[0039] The display device provided in the present application is characterized in that the first film layer structure 21 and the second film layer structure 22 are different film layer structures in the same composite adhesive tape, and only one piece of the composite adhesive tape 13 is needed to realize the covering protection of the second surface S2 and the adhesive fixing of the relative area of the binding part 112 and the display part 111, thereby simplifying the structure and manufacturing process of the display device and reducing the manufacturing cost.

[0040] In the embodiments of the present application, the display panel is a flexible display panel, which can be an OLED (Organic Light Emitting Diode) panel or a micro-LED (Light Emitting Diode) panel. In the OLED panel, the light emitting element is an OLED; in the micro-LED panel, the light emitting element is a micro-LED, which includes a Mini LED or a Micro LED.

[0041] In the display panel, the display part 111, the bendable part 113 and the binding part 112 are an integrated structure. After the binding part 112 is folded to be opposite to the second surface S2 based on the bendable part 113, the bendable part 113 is curved into an arc-shaped structure, and the binding part 112 and the display part 111 are still flat plate structures. After the binding part 112 is folded to one side of the second surface S2, the vertical projection of the binding part 112 on the display part 111 coincides with the first area Q1. The first area Q1 is the area opposite to the second surface S2 and the binding part 112, and the second area Q2 is the area of the second surface S2 except the first area Q1.

[0042] The second film layer structure 22 is used at least for adhesive fixing of the binding part 112 and the first film layer structure 21. In the direction perpendicular to the display part 111, the area of the second film layer structure 22 opposite to the first film layer structure 21 for adhesive fixing can have no overlap with the second area Q2, that is, the vertical projection of the area for adhesive fixing on the second surface S2 is located in the first area Q1; or, the area of the second film layer structure 22 opposite to the first film layer structure 21 for adhesive fixing has an overlapping part with the second area Q2, that is, the vertical projection of the area for adhesive fixing on the second surface S2 covers the first area Q1 and the part of the second area Q2 adjacent to the first area Q1.

[0043] In the embodiments of the present application, the area of the second film layer structure 22 opposite to the first film layer structure 21 for adhesive fixing is taken as an example to have an overlapping part with the second area Q2. As described in the following embodiments, based on the overlapping part, the second film layer structure 22 can adhesive fix the flexible circuit board connected with the binding part 112.

[0044] In some embodiments of this application, in the portion of the composite tape 13 located between the binding portion 112 and the display portion 111, the first film layer structure 21 and the second film layer structure 22 may be flush with the ends of the bendable portion 113, such as... Figure 1 As shown, the left ends of the first film layer structure 21 and the second film layer structure 22 are flush to facilitate the fabrication of the composite tape and its alignment and bonding with the display panel. In other embodiments, in the portion of the composite tape 13 located between the bonding portion 112 and the display portion 111, the ends of the first film layer structure 21 and the second film layer structure 22 facing the bendable portion 113 may also be non-flush.

[0045] In some embodiments of this application, the portion of the composite tape 13 located between the binding portion 112 and the display portion 111 does not overlap with the bendable portion 113, such as... Figure 1 As shown, the portion of composite tape 13 located between the binding portion 112 and the display portion 113 is located at the right end of the vertical dotted line, meaning that this portion of composite tape 13 does not overlap with the bendable portion 113, in order to avoid the composite tape 13 being subjected to bending stress from the bendable portion 113 in a bent state, and to avoid the problem of the composite tape 13 peeling off from the display panel due to such stress.

[0046] refer to Figure 3 As shown, Figure 3 A cross-sectional view of another display device provided in an embodiment of this application, in Figure 1 Based on the method shown, Figure 3 In the display device shown, a protective layer 14 is provided on the side of the display panel facing away from the display surface. The protective layer 14 is also provided between the display portion 111 and the composite tape 13, and between the bonding portion 112 and the composite tape 13, with the flexible portion 113 exposed. Specifically, the non-display side of the display panel 11 has the protective layer 14. The protective layer 14 includes at least a portion located between the bonding portion 112 and the second film layer structure 22, and a portion located between the first film layer structure 21 and the second surface S2, with the flexible portion 113 exposed. Optionally, the material of the protective layer 14 is polyethylene terephthalate.

[0047] The protective layer 14 is used to prevent damage to the non-display side of the display panel 11. Specifically, before the bonding portion 112 is bent, the protective layer 14 is used to protect the non-display side of the display panel 11 and prevent damage to the non-display side. After the bonding portion 112 is bent, the protective layer 14 is used to prevent damage to the non-display side of the display panel 11 during the process of attaching and fixing the composite tape 12.

[0048] like Figure 3As shown, in order to facilitate the folding of the bendable part 113, the protective layer 14 is provided with an opening at the bendable part 113. Based on the opening, the protective layer 14 does not cover the bendable part 113, so as to expose the bendable part 113, thereby facilitating the folding of the bendable part 113.

[0049] It should be noted that the protective layer 14 can be provided or not provided on the surface of the display panel 11 based on requirements, and the embodiments of the present application do not limit this.

[0050] Reference Figure 4 As shown, Figure 4 A first film layer structure provided by the embodiments of the present application is shown in a cross-sectional view, which is combined with Figure 2 and Figure 4 As shown, in the direction in which the first surface S1 points to the second surface S2, the first film layer structure 21 includes: a first adhesive layer 211, a first support protective layer 212 and a first metal layer 213 which are sequentially stacked; wherein the first film layer structure 21 is fixedly bonded to the second surface S2 through the first adhesive layer 211.

[0051] The first adhesive layer 211 is used to fixedly bond the first film layer structure 21 and the second surface S2. The first adhesive layer 211 can be directly fixedly bonded to the second surface S2 of the display panel 11, or the first adhesive layer 211 can be fixedly bonded to the second surface S2 through the protective layer 14 provided on the non-display side of the display panel 11. The first support protective layer 212 is used to buffer the force acting on the second surface S2. The first support protective layer 212 can be a foam layer. The first metal layer 213 is used to realize electromagnetic protection of the display panel 11, and can also realize uniform distribution of heat on the non-display side of the display panel 11, thereby avoiding local heat concentration. In the embodiments of the present application, the metal layer can be a copper foil or other metal film.

[0052] The first film layer structure 21 covers the entire second surface S2. The first film layer structure 21 is used for protection of the second surface S2, and can also realize uniform distribution of heat on the non-display side of the display panel 11. The part of the first film layer structure 21 on the second region Q2 can also be used to support the structural member on the non-display side of the display panel.

[0053] As shown, Figure 4 The part of the first adhesive layer 211 on the first region Q1 and the part of the first adhesive layer 211 on the second region Q2 are in an integrated structure; the part of the first support protective layer 212 on the first region Q1 and the part of the first support protective layer 212 on the second region Q2 are in an integrated structure. The integrated first adhesive layer 211 and the integrated first support protective layer 212 make the structure of the composite adhesive tape 13 simple, and make the manufacturing process of the composite adhesive tape 13 simple.

[0054] Optionally, as Figure 4As shown, the portion of the first metal layer 213 on the first region Q1 and the portion on the second region Q2 can be integrated into a single structure, thereby simplifying the structure of the composite tape 13 and the manufacturing process of the composite tape 13.

[0055] refer to Figure 5 As shown, Figure 5 A cross-sectional view of another first film structure provided in the embodiments of this application, and Figure 4 The difference shown is that, combined with Figure 2 and Figure 5 As shown, in this method, the first metal layer 213 has a gap 213a, which is located outside the area where the second film structure 22 and the first film structure 21 are relatively bonded and fixed, in the direction from the first region Q1 to the second region Q2 ( Figure 5 In the direction from left to right, the length of the first part 221 of the second membrane structure 22 is less than the length of the first membrane structure 21. The first part 221 is bonded and fixed to the first membrane structure 21, and the gap 213a is located outside the area where the first part 221 and the first membrane structure 21 are bonded and fixed. The area where the second membrane structure 22 and the first membrane structure 21 are bonded and fixed is defined as the target area, and the gap 213a does not overlap with the target area.

[0056] Compared to the method of separately attaching and fixing the first section of tape to the second surface S2, and then using the second section of tape to bond and fix the binding part 112 and the first section of tape, in the technical solution of this application, the second film structure 22 is a composite tape 13 with its own tape film layer. This not only avoids surface contamination of the first metal layer 213 in the first region Q1, but also strengthens the adhesion between the first part 221 and the first film structure 21, thus preventing the composite tape 13 on the first region Q1 from peeling off.

[0057] Combination Figure 1 and Figure 5As shown, the second film layer structure 22 is used to bond and fix the binding part 112 and the first film layer structure 21. The binding part 112 can apply a stress from the first surface S1 to the second surface S2 to the first film layer structure 21 in the target area. The first support protection layer 212 and the first adhesive layer 211 are non-metal materials with good deformation performance, which can buffer the stress based on the tensile deformation of the thickness. The deformation performance of the first metal layer 213 of metal material is relatively poor, and cannot buffer the stress by the tensile deformation of the thickness. In the first film layer structure 21 outside the target area, the first metal layer 213 is prone to warping under the action of stress, thereby causing peeling problems with adjacent film layers. Based on the gap 213a, the first metal layer 213 in the target area and outside the target area can be disconnected, thereby avoiding the influence of the stress applied by the binding part 112 on the composite adhesive tape 13 on the first metal layer 213 outside the target area, and thereby avoiding the peeling problem of the first metal layer 213 outside the target area with adjacent film layers.

[0058] Reference Figure 6 As shown, Figure 6 Another cross-sectional view of a display device is provided for the embodiments of the present application. In this mode, the second film layer structure 22 further comprises a second part 222 and a third part 223, and the two ends of the second part 222 are integrally connected with the first part 221 and the third part 223 respectively. The third part 223 is folded to the side of the binding part 112 away from the display part 111 based on the folded second part 222, covering the control chip 12.

[0059] The first part 221 and the first film layer structure 21 are bonded and fixed by the adhesive layer 31. The adhesive layer 31 is the third adhesive layer in the following.

[0060] Figure 6 The mode shown does not need a separate chip fixing adhesive tape, and uses a section of composite adhesive tape, which not only can realize the covering protection of the second surface S2 and the support of the surface structure, but also can realize the bonding and fixing of the binding part 112 and the display part 111, and can realize the bonding and fixing of the control chip 12.

[0061] Optionally, the end of the third part 223 away from the second part 222 crosses the control chip 12 and is bonded and fixed with the binding part 112, and the bonding and fixing position of the end with the binding part 112 does not overlap with the bendable part 113. The binding part 112 and the display part 111 are flat plate structures, and the bonding and fixing position of the end with the binding part 112 does not overlap with the bendable part 113, which can make the bonding and fixing of the end with the binding part 112 of the flat plate structure, and avoid that when the bonding position overlaps with the bendable part 113, the overlapping part causes the bending stress of the second film layer structure 22 at the bonding and fixing position to affect the bonding effect.

[0062] Optionally, the end of the third part 223 is adhesively fixed to the binding part 112, and the adhesively fixed position is located on the side of the control chip 12 close to the bendable part 113, as shown in Figure 6 The adhesively fixed position of the third part 223 to the binding part 112 is located between the vertical dashed line and the control chip 12, as shown in the figure. The third part 223 located between the top of the control chip 12 and the second part 222 has a gap between the binding part 112, so that the third part 223 located between the top of the control chip 12 and the second part 222 has a smaller degree of deformation, thereby reducing the deformation stress. In other ways, the third part 223 located between the top of the control chip 12 and the second part 222 can also be adhesively fixed to the binding part 112.

[0063] Referring to Figure 7 and Figure 8 , as shown, Figure 7 is a top view of a composite adhesive tape provided by an embodiment of the present application, Figure 8 is Figure 7 a sectional view of the composite adhesive tape shown in the A-A' direction, Figure 7 and Figure 8 is Figure 6 illustrates the flattened state of the composite adhesive tape 13 when it is not adhesively fixed to the display panel 11. In combination with Figure 2 , Figure 6- Figure 8 , as shown, the composite adhesive tape 13 includes: a first film layer structure 21 and a second film layer structure 22 arranged opposite to each other.

[0064] The shape of the first film layer structure 21 is adapted to the shape of the display part 111, and is adhesively fixed to the second surface S2 of the display part 111. The width of the bendable part 113 and the binding part 112 is smaller than the width of the display part 111, so as to facilitate the bending of the binding part 112 to one side of the second surface S2. The width of the second film layer structure 22 is adapted to the width of the bendable part 113 and the binding part 112, so as to facilitate the adhesively fixed of the second film layer structure 22 to the back surface of the entire binding part 112 in the width direction (the surface of the binding part 112 after bending facing the display part 111).

[0065] The shape of the first film layer structure 21 being adapted to the shape of the display part 111 means that the shape of the first film layer structure 21 is the same as or approximately the same as the shape of the display part 111, so as to cover the entire second surface S2 by the first film layer structure 21. The width of the second film layer structure 22 being adapted to the width of the bendable part 113 and the binding part 112 means that the width of the second film layer structure 22 is the same as or approximately the same as the width of the bendable part 113 and the binding part 112. The width is Figure 7 the vertical dimension in the figure.

[0066] The second film layer structure 22 can be bonded and fixed to the lower surface of the bonding portion 112 via the first portion 221, and the third portion 223 can be folded onto the side of the control chip 12 away from the bonding portion 112 based on the bent second portion 222, thereby bonding and fixing the third portion 223 to the control chip 12 and the front side of the bonding portion 112 (the surface of the bent bonding portion 112 away from the display portion 111). In the second film layer structure 22, the lengths of the first portion 221, the second portion 222, and the third portion 223 are set based on the bonding and fixing requirements between the second film layer structure 22 and the display panel 11. Under the premise of satisfying the bonding and fixing requirements between the second film layer structure 22 and the display panel 11, this embodiment of the application does not specifically limit the lengths of the first portion 221, the second portion 222, and the third portion 223. The length direction is... Figure 7 In the horizontal direction.

[0067] Based on the shapes of the bendable portion 113 and the bonding portion 112 in the display panel 11 relative to the display portion 111, it can be known that the length of the second film layer structure 22 is less than the length of the first film layer structure 21, such as Figure 7 As shown, the width of the second membrane structure 22 is smaller than the width of the first membrane structure 21, and the second membrane structure 22 and the first membrane structure 21 are centered and flush at one end in the length direction, as shown. Figure 7 As shown, the second membrane structure 22 is located in the middle region of the left side of the first membrane structure 21.

[0068] The surface of the first film layer structure 21 facing the second film layer structure 22 has a first release film 32. The first release film 32 is in the same layer as the adhesive layer 31.

[0069] The first release film 32 includes a portion located between the second film structure 22 and the first film structure 21. This portion of the first release film 32 can support the second part 222 and the third part 223 of the second film structure 22. When the composite tape 13 is not bonded and fixed to the display panel 11, this portion of the first release film 32 can make the distance between different positions of the second film structure 22 and the first film structure 21 in the length direction the same or approximately the same, so as to facilitate the curling and storage of the composite tape 13.

[0070] The first release film 32 also includes a portion that does not overlap with the second film layer structure 22. When the composite tape 13 is not bonded and fixed to the display panel 11, this portion of the first release film 32 can prevent the covered first film layer structure 21 from being contaminated and damaged.

[0071] The composite adhesive tape 13 further comprises a heightening layer 33, which is located on the side surface of the first film layer structure 21 away from the first film layer structure 21, and the heightening layer 33 does not overlap with the second film layer structure 22. The heightening layer 33 is used to make the area of the composite adhesive tape 13 with the second film layer structure 22 and the area outside the second film layer structure 22 have the same or similar thickness, so as to facilitate the coiled storage of the composite adhesive tape 13.

[0072] The composite adhesive tape 13 further comprises a second release film 34, which covers the side surface of the second film layer structure 22 away from the first film layer structure 21. When the composite adhesive tape 13 is not bonded and fixed with the display panel 11, the second release film 34 can prevent the second film layer structure 22 from being contaminated.

[0073] Optionally, the composite adhesive tape 13 further comprises a film tearing structure 35 between the first film layer structure 21 and the second film layer structure 22. The film tearing structure 35 extends in the width direction of the composite adhesive tape 13 and extends beyond the boundary of the first film layer structure 21. When the composite adhesive tape 13 is bonded and fixed with the display panel 11, based on the film tearing structure 35, the second part 222 and the third part 223 of the second film layer structure 22 can be separated from the first film layer structure 21, so as to facilitate the third part 223 to be bonded and fixed with the binding part 112 based on the bending of the second part 222, and to cover and protect the control chip 12.

[0074] The above-mentioned first release film 32, the second release film 34, the heightening layer 33 and the film tearing structure 35 are all structural members when the composite adhesive tape 13 is not bonded and fixed with the display panel 11, and these structural members are all removed after the composite adhesive tape 13 is bonded and fixed with the display panel.

[0075] In order to facilitate the bending of the second part 222, the elastic modulus of the second part 222 is set to be smaller than the elastic modulus of the first part 221 and the third part 223, so as to make the second film layer structure 22 more easily bent at the second part 222.

[0076] The second part 222 can be provided with an adjusting structure for increasing the bending capacity of the second part, so that the second part 222 has a smaller elastic modulus relative to the first part 221 and the third part 223, so as to make the second film layer structure 22 more easily bent at the second part 222.

[0077] In order to form the adjusting structure to facilitate the bending of the second part 222, a first mode can be as shown in Figure 9

[0078] Referring to Figure 9 Figure 9 ​​This is a top view of a second metal layer provided in an embodiment of this application. The second film structure 22 includes a second metal layer 41. The second metal layer 41 has a hollowed-out area 411 in the second part 222 as an adjustment structure, so that the second film structure 22 can be bent in the second part 222. The second part 222 may be provided with a seam line, including a plurality of hollowed-out areas 411 arranged sequentially in the width direction.

[0079] To create an adjustable structure that allows the second part 222 to bend, the second method can be as follows: Figure 10 As shown.

[0080] refer to Figure 10 As shown, Figure 10 This is a schematic diagram of a second membrane structure provided for the implementation of this application. In this structure, the thickness of the second part 222 is less than the thickness of the first part 221 and the third part 223, so that the second part 222 has better bending characteristics relative to the first part 221 and the third part 223, and is easier to bend.

[0081] In order to form an adjustment structure so that the second part 222 can be bent, the third method can simultaneously adopt the first and second methods mentioned above.

[0082] refer to Figure 11 As shown, Figure 11 This is a partially enlarged view showing the bonding and fixing of the third part, the binding part, and the control chip in a second film structure provided in an embodiment of this application. Figure 6 and Figure 11 As shown, the sidewall of the control chip 12 has a fixing adhesive 16, the fixing adhesive 16 has a bevel 161, the bevel 161 extends from the top surface of the control chip 12 to the surface of the bonding portion 112 opposite to the display portion 111; the third portion 223 has a beveled area 223a that is bonded and fixed to the bevel 161.

[0083] The adhesive 16 surrounds the sidewall of the control chip 12, and the width of the adhesive 16 gradually decreases from the bottom to the top of the control chip 12, thus forming a slope 161. When the third part 223 is folded to the side of the control chip 12 away from the bonding part 112, the third part 223 is bonded to the bonding part 112 and simultaneously bonded to the slope 161. The slope 161 provides support for the sloped area 223a, preventing the sloped area 223a from being suspended, and also improving the adhesive force of the third part 223 on the bonding part 112. It is easy to see that this method can also adjust the slope of the sloped area 223a based on the slope 161, so that the third part 223 forms the sloped area 223a on both sides of the control chip 12 with a suitable slope, avoiding the third part 223 from being too long due to an excessive slope, and avoiding the deformation stress and insufficient adhesive force due to an excessively small slope.

[0084] refer to Figure 12 As shown, Figure 12 This is a partial side view of the third part of a second membrane structure provided in an embodiment of this application. Figure 12 for Figure 11 The diagram shown illustrates the third part 223 in a flattened state, combined with... Figure 11 and Figure 12 As shown, the third part 223 has a first sub-region 51 for forming the inclined region 223a. In the length extension direction of the third part 223, the first sub-region 51 has a first end and a second end, the first end being close to the top of the control chip 12 and the second end being close to the bottom of the control chip 12; wherein, the thickness of the third part 223 at the first end and the second end is less than the thickness of other regions of the third part, which facilitates bending based on the thinner first end and the second end to form the inclined region 223a.

[0085] In other methods, hollow areas can be provided at the first and second ends to increase bending characteristics, so as to facilitate bending at the first and second ends to form inclined areas 223a. When the second membrane structure 22 has a third part 223 that is bonded and fixed to the binding part 112, the second membrane structure 22 is a multi-layered structure, and at least one layer of the third part 223 can be provided with hollow areas at the first and second ends. It is easy to understand that in order to facilitate bending at both ends of the first sub-region 51 to form inclined areas 223a, the thickness of the third part 223 at the first and second ends can be set to be less than the thickness of other areas of the third part, and / or at least one layer of the third part 223 can be provided with hollow areas at the first and second ends.

[0086] exist Figure 6- Figure 12 In the manner shown, the structure of the second membrane structure 22 can be as follows: Figure 13 As shown.

[0087] Referring to Figure 13 as shown, Figure 13 As shown in the structural schematic diagram of the display device provided in the embodiment, the second film layer structure 22 comprises a second adhesive layer 101 and a second metal layer 102 stacked; in the first part 221, the second adhesive layer 101 is adhered and fixed to the side surface of the binding part 112 facing the display part 111, and the second metal layer 102 is adhered and fixed to the first film layer structure 21; in the third part 223, the second metal layer 102 is adhered and fixed to the side surface of the binding part 112 away from the display part 111 through the second adhesive layer 101.

[0088] In Figure 13 the manner shown, the second film layer structure 22 comprises the second metal layer 102, and after the second film layer structure 22 is adhered and fixed to the binding part 112, the second metal layer 102 covers the control chip 12, so that the control chip 12 can be electromagnetically protected, and the heat dissipation efficiency of the control chip 12 can be improved. The heat generated by the control chip 12 is vertically conducted to the second metal layer 102, and then quickly laterally conducted to the area away from the control chip 12 through the second metal layer 102, so that the heat dissipation efficiency of the control chip 12 can be improved through the second metal layer 102.

[0089] As Figure 13 shown, the first part 221 and the first film layer structure 21 are adhered and fixed through a third adhesive layer, which is the adhesive layer 31 described above. Based on the third adhesive layer, the first film layer structure 21 and the second film layer structure 22 have a relatively adhered and fixed area, forming a composite adhesive tape 13.

[0090] When the second film layer structure 22 has the second part 222 and the third part 223, the thickness of the second film layer structure 22 is set to be less than the thickness of the first film layer structure 21, so that when the thickness of the composite adhesive tape 13 is constant, the second film layer structure 22 with a relatively small thickness is set, which facilitates the local bending of the second film layer structure 22 to the side of the binding part 112 away from the display part 111.

[0091] Referring to Figure 14 as shown, Figure 14 As shown in the cross-sectional view of the display device provided in the embodiment, the binding part 112 is connected to the flexible circuit board 17 at the end away from the bendable part 113; the side surface of the flexible circuit board 17 away from the display part 111 is adhered and fixed to the third part 223.

[0092] As described above, in a conventional display device, a first section of adhesive tape needs to be adhered to the second surface S2 of the display portion 111. This tape is used at least to protect the second surface S2 and to support structural components such as circuit boards and under-display cameras that need to be installed on the second surface S2. A second section of adhesive tape is also needed between the bonding portion 112 and the first section of adhesive tape to bond and fix the bonding portion 112. Furthermore, a third section of adhesive tape is also needed between the flexible circuit board 17 and the first section of adhesive tape to bond and fix the flexible circuit board 17.

[0093] use Figure 14 As shown, a single piece of composite tape is used, which can not only bond and fix the device to the second surface S2, but also bond and fix the device to the control chip 12 and the flexible circuit board 17 through the third part 223 of the second film layer structure 22. This replaces the three pieces of tape in conventional display devices, making the structure and manufacturing process of the display device simple and reducing the manufacturing cost.

[0094] refer to Figure 15 and Figure 16 As shown, Figure 15 This is a cross-sectional view of another display device provided in an embodiment of this application. Figure 16 for Figure 15 The image shows a cross-sectional view of the composite tape used in the display device. Figure 16 This is a schematic diagram showing the flattened state of the composite tape 13 when it is not bonded to the display panel 11. In this configuration, the structure of the composite tape 13 in its flattened state when not bonded to the display panel 11 is similar to... Figure 7 and Figure 8 The method shown is the same, except that the implementation of the first membrane structure 21 is the same as... Figure 4 The implementation method of the second film structure is the same as shown. Figure 13 same.

[0095] exist Figure 15 and Figure 16 In the illustrated method, the composite tape 13 is supplied as a single piece and can be used for bonding and fixing the bonding part 112 and the display part 111. It can also be used for protecting the second surface S2 and supporting the surface structure, bonding and fixing the flexible circuit board 17, and bonding and fixing the control chip 12. Using a single composite tape can simultaneously achieve the functions of multiple tapes in conventional display devices, which can simplify the structure and manufacturing process of the display device and greatly reduce the manufacturing cost of the display device.

[0096] When the second film layer structure 22 further comprises the second part 222 and the third part 223, the composite adhesive tape 13 is a segmented structure as a whole: corresponding to the first part 221 of the second film layer structure 22, the composite adhesive tape 13 is a double-sided adhesive tape structure, which can be fixedly bonded between the binding part 112 and the display part 111; the second part 222 and the third part 223 of the second film layer structure 22 are single-sided adhesive tape structures, which can be fixedly bonded based on the bending of the second part 222, so that the third part 223 is fixedly bonded on the side of the binding part 112 away from the display part 111 and protects the control chip 12; the other part of the first film layer structure 21 except the fixedly bonded area with the second film layer structure 22 is a single-sided adhesive tape structure, which is used for fixedly bonding with the second surface S2.

[0097] As shown in the display device shown in each embodiment of the present application, Figure 17 As shown, the light-emitting side of the display panel 11 is provided with a cover plate 18, which can be a glass plate. The cover plate 18 is fixedly bonded with the display part 111 of the display panel 11 through optical adhesive.

[0098] As shown in the display device shown in each embodiment of the present application, Figure 17 As shown in the display device shown in each embodiment of the present application, Figure 17 As shown in the display device shown in each embodiment of the present application, the second film layer structure 22 of the composite adhesive tape 13 has a first area, the area where the first part 221 is fixedly bonded with the first film layer structure 21 has a second area, and the first area is equal to the second area. In this way, the second film layer structure 22 is completely fixedly bonded with the first film layer structure 21, and the first part 221 is the entire second film layer structure 22. In this way, a separate chip fixing adhesive tape 15 is needed to fixedly bond the control chip 12.

[0099] The chip fixing adhesive tape 15 covers the control chip 12 and is fixedly bonded with the binding part 112. The chip fixing adhesive tape 15 is used for fixedly bonding the control chip 12 and sealingly protecting the control chip 12. Optionally, the chip fixing adhesive tape 15 at least comprises: an adhesive layer, which is used for fixedly bonding with the binding part 112; a metal layer located on the side of the adhesive layer away from the control chip 12, which is used for electromagnetically protecting the control chip 12 and can also improve the heat dissipation efficiency of the control chip 12.

[0100] As shown in the display device shown in each embodiment of the present application, Figure 17 As shown, the binding part 112 is connected with a flexible circuit board 17 at one end away from the bendable part 113; in the direction perpendicular to the second surface S2, the first part 221 is located between the flexible circuit board 17 and the first film layer structure 21, and the first part 221 also fixedly bonds the flexible circuit board 17 and the first film layer structure 21. In this way, the first part 221 of the composite adhesive tape 13 can be reused to fixedly bond the flexible circuit board 17, and there is no need to separately provide an adhesive tape for fixedly bonding the flexible circuit board 17.

[0101] In other ways, when the first area is equal to the second area, the first part 221 can also be located outside the area directly opposite the flexible circuit board 17 and the first film structure 21. That is, in the direction perpendicular to the second surface S2, the first part 221 and the flexible circuit board 17 have no overlapping part. In this case, the flexible circuit board 17 can be fixed on the surface of the first film structure 21 by another tape separately set between the flexible circuit board 17 and the first film structure 21.

[0102] Compared to Figure 6 As shown, Figure 17 As shown, the second film structure 22 is completely attached to the surface of the first film structure 21. There is no requirement for electromagnetic shielding or heat dissipation performance. Therefore, the second film structure can be an adhesive layer, and there is no need to set a metal layer.

[0103] When the first area is equal to the second area, the structure of the first film layer structure 21 can be the same as in the above embodiment, including the first adhesive layer 211, the first support and protective layer 212 and the first metal layer 213 stacked in sequence.

[0104] When the first area equals the second area, the structure of the composite tape 13 not being bonded to the display panel 11 can be as follows: Figure 18 and Figure 19 As shown.

[0105] refer to Figure 18 As shown, Figure 18 This is a top view of another composite tape provided in an embodiment of this application. Figure 19 for Figure 18 The cross-sectional view of the composite tape shown is along the A-A' direction. Figure 18 and Figure 19 This illustration shows the state when the composite tape 13 is not bonded to the display panel 11. In this method, the structure of the first film layer structure 21 can be the same as in the above embodiment, including a first adhesive layer 211, a first support and protective layer 212, and a first metal layer 213 stacked sequentially. The first metal layer 213 and the first support and protective layer 212 are bonded together by an adhesive layer 214. The second film layer structure 22 is entirely the first part 221, and the second film layer structure 22 is a single adhesive layer.

[0106] Figure 18 and Figure 19 In the illustrated configuration, the composite tape 13 is designed in segments. The composite tape 13 is a double-sided tape structure in the area corresponding to the second film structure 22, which is used to bond and fix the binding part 112 and the opposite display part 111. The composite tape 13 is a single-sided tape structure in the area outside the second film structure 22, which is used to bond and fix the second surface S2.

[0107] like Figure 19As shown, in the first film layer structure 21, the first metal layer 213 has a gap 213a in the first metal layer 213, the gap 213a is located outside the area where the second film layer structure 22 is fixedly bonded to the first film layer structure 21, so as to reduce the stress on the first metal layer 213 in the composite tape 13 outside the second film layer structure 22. The gap 213a passes through the adhesive layer 214, exposing the first support protection layer 212 below the adhesive layer 214. As described above, the first metal layer 213 and the adhesive layer 214 can also be provided as an integral structure, and the gap 213a does not need to be provided.

[0108] In the embodiment of the application, the first film layer structure 21 includes the first metal layer 213; in the area where the first film layer structure 21 is fixedly bonded to the first part 211, the first metal layer 213 has a first thickness; and outside the area, the first metal layer 213 has a second thickness, the second thickness being greater than the first thickness. In other modes, the first thickness can also be equal to the second thickness.

[0109] The composite tape 13 is provided with a first tape area and a second tape area, the first metal layer 213 in the first tape area has a first thickness, and the first metal layer 213 in the second tape area has a second thickness. The second thickness is greater than the first thickness, which can increase the thickness of the adhesive layer in the first area and reduce the thickness of the first metal layer 213 when the thickness of the composite tape is constant, so as to ensure the adhesion of the first tape area to the binding part 112, and also enable the bendable part 113 to have a smaller bending radius and reduce the thickness of the display device. In addition, the second thickness being greater than the first thickness can enable the second tape area to have greater mechanical strength, so as to ensure the pressure strength of the display part 111 corresponding to the second tape area.

[0110] As in the above embodiment, the area of the first metal layer 213 corresponding to the first part 221 is covered by the first part 221 of the second film layer structure 22 provided by the composite tape itself, which can avoid the surface of the first metal layer 213 in this area from being contaminated, ensure the adhesion between the layers of the composite tape 13 in this area, and avoid interlayer peeling problems.

[0111] Figure 19 The mode shown can also be used to fix the flexible circuit board 17 by the composite tape 13, and can also realize the protection of the second surface S2 and the support of the surface structure, and can also realize the fixation of the binding part 112. In conventional technology, three tapes are needed to realize the three purposes respectively, so Figure 19 The mode shown simplifies the structure of the display device and the manufacturing process, and reduces the manufacturing cost.

[0112] In any of the above embodiments of the present application, the position of the first portion 221 and the bonding and fixing region of the first film layer structure 21 relative to the binding portion 112 can be set based on requirements. The first portion 221 has a first vertical projection on the second surface S2, and the binding portion 112 has a second vertical projection on the second surface S2. The position of the first portion 221 and the bonding and fixing region of the first film layer structure 21 relative to the binding portion 112 includes any of the following modes:

[0113] In mode one, the first vertical projection is located within the second vertical projection. At this time, the area of the first vertical projection is not greater than the area of the second vertical projection, and in the direction perpendicular to the second surface S2, the first portion 221 is completely covered by the binding portion 112.

[0114] In mode two, the second vertical projection is located within the first vertical projection, and the area of the first vertical projection is greater than the area of the second vertical projection. At this time, in the direction perpendicular to the second surface S2, the first portion 221 can be reused to extend to the local bonding and fixing flexible circuit board 17 outside the binding portion 112.

[0115] In the present specification, each embodiment is described in a progressive, or parallel, or a combination of progressive and parallel manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0116] It should be noted that in the description of the present application, it should be understood that the drawings and the description of the embodiments are illustrative but not limiting. The same reference numerals in the embodiments throughout the specification indicate the same structure. In addition, for the purpose of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. It can be understood that when an element such as a layer, film, region or substrate is referred to as "on" another element, the element can be directly on the other element or there can be an intermediate element. In addition, "on" means positioning an element on another element or below another element, but essentially does not mean positioning on the upper side of another element according to the direction of gravity.

[0117] The terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there can be a component disposed therebetween.

[0118] It is also noted that the relational terms herein, such as first and second, and the like, are used solely to distinguish one from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a vesicle or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such vesicle or apparatus. An element proceeded by "comprises a... " does not, without more constraints, preclude the existence of additional identical elements in the vesicle or apparatus that comprises the recited element.

[0119] The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display device, characterized in that, include: The display panel includes: a display portion having a first surface and a second surface opposite to each other, the first surface being the surface from which light is emitted from the display panel; a bendable portion and a bonding portion, the bendable portion being located between the display portion and the bonding portion, the bonding portion being bent through the bendable portion to a side facing the second surface, and a control chip being bonded to the side of the bonding portion facing away from the display portion; the second surface includes a first region and a second region, and the vertical projection of the bonding portion on the second surface is located in the first region; A composite tape, at least partially located between the display portion and the bonding portion, the composite tape comprising a first film layer structure and a second film layer structure, the first film layer structure being bonded and fixed to a second surface; the second film layer structure comprising at least a first portion; the vertical projection of the first portion onto the second surface being located within a first region, the first portion being bonded and fixed to both the first film layer structure and the bonding portion; The second film structure further includes a second part and a third part, wherein the two ends of the second part are integrally connected to the first part and the third part respectively; the third part is folded onto the side of the bonding part away from the display part based on the bent second part, covering the control chip; Alternatively, the second film structure has a first area, and the area where the first part is bonded and fixed to the first film structure has a second area, the first area being equal to the second area; a flexible circuit board is connected to one end of the bonding portion away from the bendable portion; in a direction perpendicular to the second surface, the first part is located between the flexible circuit board and the first film structure, and the first part also bonds and fixes the flexible circuit board to the first film structure.

2. The display device according to claim 1, characterized in that, In the direction from the first surface to the second surface, the first film structure includes: a first adhesive layer, a first support and protective layer, and a first metal layer stacked sequentially; The first film structure is bonded and fixed to the second surface by the first adhesive layer.

3. The display device according to claim 2, characterized in that, The portion of the first adhesive layer in the first region and the portion in the second region are integral structures. The portion of the first support and protective layer on the first region and the portion on the second region are integral structures.

4. The display device according to claim 3, characterized in that, The portion of the first metal layer on the first region and the portion on the second region are integral structures.

5. The display device according to claim 2, characterized in that, The first metal layer has a gap, which is located outside the area where the second film structure is bonded and fixed to the first film structure.

6. The display device according to claim 1, characterized in that, The elastic modulus of the second part is less than that of the first part and the third part.

7. The display device according to claim 1, characterized in that, The second part includes an adjustment structure for increasing the bending capacity of the second part.

8. The display device according to claim 7, characterized in that, The second film structure includes a second metal layer, which has a hollow area in the second part serving as the adjustment structure; And / or, the thickness of the second part is less than the thickness of the third part and the first part.

9. The display device according to claim 1, characterized in that, The control chip has a fixing adhesive on its sidewall, the fixing adhesive has a bevel, the bevel extends from the top surface of the control chip to the surface of the bonding portion opposite to the display portion; the third portion has a bevel area that is bonded and fixed to the bevel.

10. The display device according to claim 9, characterized in that, The third part has a first sub-region for forming the inclined region; in the length extension direction of the third part, the first sub-region has a first end and a second end, the first end being close to the top of the control chip and the second end being close to the bottom of the control chip; Wherein, the thickness of the third part at the first end and the second end is less than the thickness of other areas of the third part; and / or, the third part is a multi-layered structure, with at least one layer having a hollowed-out area at the first end and the second end.

11. The display device according to claim 1, characterized in that, The end of the third part away from the second part crosses the control chip and is bonded and fixed to the binding part. The bonding and fixing position of the end to the binding part does not overlap with the bendable part.

12. The display device according to claim 1, characterized in that, The second film structure includes a stacked second adhesive layer and a second metal layer; In the first part, the second adhesive layer is bonded and fixed to the surface of the bonding portion facing the display portion, and the second metal layer is bonded and fixed to the first film layer structure; In the third part, the second metal layer is bonded and fixed to the side surface of the bonding portion opposite to the display portion by the second adhesive layer.

13. The display device according to claim 1, characterized in that, A flexible circuit board is connected to the end of the binding portion away from the bendable portion; The flexible circuit board is bonded and fixed to the third part on the side surface opposite to the display portion.

14. The display device according to claim 1, characterized in that, The first film structure includes a first metal layer; In the region where the first film structure is bonded and fixed to the first portion, the first metal layer has a first thickness; outside the region where it is bonded and fixed, the first metal layer has a second thickness, which is greater than the first thickness.

15. The display device according to claim 1, characterized in that, When the first area is equal to the second area, the second film structure is an adhesive layer.

16. The display device according to claim 1, characterized in that, In the portion of the composite tape located between the bonding portion and the display portion, the first film layer structure and the second film layer structure are flush with the ends facing the bendable portion.

17. The display device according to claim 1, characterized in that, The portion of the composite tape located between the binding portion and the display portion has no overlapping area with the bendable portion.

18. The display device according to claim 1, characterized in that, The side of the display panel facing away from the display surface has a protective layer; The protective layer is provided between the display portion and the composite tape, and between the binding portion and the composite tape, with the protective layer exposing the bendable portion.

Images