Display module, heat dissipation film and display device

Abstract

The invention discloses a display module, a heat dissipation film and a display device. The display module comprises a display panel and the heat dissipation film. The display panel comprises a display part used for displaying pictures, and the display part comprises a display area and a peripheral area surrounding the display area. The heat dissipation film is arranged on the non-display side of the display part in a stacked mode. The heat dissipation film comprises a metal layer and a composite film layer which are arranged in a stacked mode, and the metal layer is farther away from the display part than the composite film layer. Wherein the composite film layer comprises a first film layer structure and a filling part, and the first film layer structure and the filling part are both connected with the metal layer. The orthographic projection of the first film layer structure on the display part at least covers the display area, the orthographic projection of the filling part on the display part at least covers part of the peripheral area, and the heat conductivity coefficient of the filling part is larger than that of the first film layer structure. The display module is used for displaying images.

Description

Display module, heat dissipation film and display device Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a display module, a heat dissipation film, and a display device. Background Art

[0002] With the continuous development of display technology, display devices have become increasingly ubiquitous in people's lives. Organic Light-Emitting Diode (OLED) display panels, due to their advantages such as self-luminescence, low power consumption, wide viewing angle, fast response speed, and high contrast, are widely used in smart products such as mobile phones, televisions, and laptops. Narrowing the bezel is currently a key development trend for display devices.

[0003] Summary of the Invention

[0004] In one aspect, a display module is provided. It includes a display panel and a heat dissipation film. The display panel includes a display portion for displaying an image, the display portion including a display area and a peripheral area surrounding the display area. The heat dissipation film is laminated on the non-display side of the display portion. The heat dissipation film includes a laminated metal layer and a composite film layer, the metal layer being further away from the display portion than the composite film layer. The composite film layer includes a first film layer structure and a filling portion, both of which are connected to the metal layer.

[0005] The orthographic projection of the first film layer structure on the display portion covers at least the display area, the orthographic projection of the filling portion on the display portion covers at least a portion of the peripheral area, and the thermal conductivity of the filling portion is greater than the thermal conductivity of the first film layer structure.

[0006] In some embodiments, the first film layer structure includes a stacked adhesive layer and a foam layer, wherein the foam layer is closer to the metal layer than the adhesive layer. The material of the filling portion includes at least one of thermally conductive silicone and graphite.

[0007] In some embodiments, the filling portion includes a thermally conductive silicone layer and a graphite layer, wherein the thermally conductive silicone layer and the graphite layer are stacked in a direction perpendicular to the display portion, or the thermally conductive silicone layer and the graphite layer are arranged side by side in a plane parallel to the display portion and are connected to each other.

[0008] In some embodiments, a surface of the filling portion away from the metal layer has a zigzag and / or wavy morphology.

[0009] In some embodiments, an edge of the first film layer structure has a notch, and the filling portion is disposed in the notch and connected to a side surface of the first film layer structure at the notch.

[0010] In some embodiments, a side surface of the first film structure outside the notch transitions smoothly to a side surface of the filling portion away from the display area.

[0011] In some embodiments, the composite film layer is a rectangular structure, and the filling portion is disposed at least at a corner of the composite film layer.

[0012] In some embodiments, the display panel further includes a bending portion and a binding portion disposed on at least one side of the display portion, wherein the display portion, the bending portion, and the binding portion are sequentially connected. The filling portion is disposed at two corners of the composite film layer at both ends of the sides corresponding to the bending portion and the binding portion.

[0013] In some embodiments, the orthographic projection of the filling portion on the display portion is substantially arc-shaped.

[0014] In some embodiments, the display portion includes a plurality of pixel units disposed in the display area, and a gate driver circuit and connecting wiring disposed in the peripheral area. The connecting wiring is located between the gate driver circuit and the display area and is configured to connect the gate driver circuit and the plurality of pixel units. The orthographic projection of the filling portion on the display portion covers at least a portion of the gate driver circuit.

[0015] In some embodiments, the orthographic projection of the filling portion on the display portion covers a portion of the connecting trace, or does not overlap with the connecting trace.

[0016] In some embodiments, the display portion further includes an electrostatic protection circuit disposed in the peripheral area, and the orthographic projection of the filling portion on the display portion at least covers a portion of the electrostatic protection circuit.

[0017] In some embodiments, a gap exists between the filling portion and the display area and its orthographic projection on the display portion.

[0018] In some embodiments, in an orthographic projection onto the display portion, a distance between an edge of the filling portion away from the display area and an edge of the display portion is 0 to 0.35 mm.

[0019] In another aspect, a heat dissipation film is provided. The heat dissipation film includes a metal layer and a composite film layer. The composite film layer is stacked on one side of the metal layer. The composite film layer includes a first film layer structure and a filling portion. The first film layer structure and the filling portion are both connected to the metal layer. The thermal conductivity of the filling portion is greater than the thermal conductivity of the first film layer structure.

[0020] In some embodiments, the first film layer structure includes a stacked adhesive layer and a foam layer, wherein the foam layer is closer to the metal layer than the adhesive layer. The material of the filling portion includes at least one of thermally conductive silicone and graphite.

[0021] In some embodiments, an edge of the first film layer structure has a notch, and the filling portion is disposed in the notch and connected to a side surface of the first film layer structure at the notch.

[0022] In some embodiments, the composite film layer is a rectangular structure, the filling portion is disposed at least at one corner of the composite film layer, and an orthographic projection of the filling portion on the metal layer is substantially arc-shaped.

[0023] In yet another aspect, a display device is provided. The display device comprises: a display module according to any of the above embodiments and a back film. The display panel in the display module comprises a display portion, a bending portion, and a binding portion, which are sequentially connected. The binding portion is disposed on the non-display side of the display portion through the bending action of the bending portion. The heat dissipation film in the display module is disposed between the display portion and the binding portion.

[0024] The back film includes a first portion and a second portion, wherein the first portion is disposed on the non-display side of the display unit and is closer to the display unit than the heat dissipation film, and the second portion is disposed on the side of the binding unit close to the display unit and is closer to the display unit than the binding unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0026] FIG1 is a structural diagram of a display device according to some embodiments;

[0027] FIG2 is a cross-sectional structural diagram of the display device along section line DD in FIG1 ;

[0028] FIG3 is a structural diagram of a display portion and a heat dissipation film according to some embodiments;

[0029] FIG4 is a structural diagram of a corner of a display portion according to some embodiments;

[0030] FIG5 is a structural diagram of a display portion and a heat dissipation film according to the related art;

[0031] FIG6 is a cross-sectional structural diagram of the heat dissipation film along section line BB in FIG5 ;

[0032] FIG7A is a cross-sectional structural diagram of the heat dissipation film along section line CC in FIG3 ;

[0033] FIG7B is another cross-sectional structural diagram of the heat dissipation film along section line CC in FIG3 ;

[0034] FIG7C is another cross-sectional structural diagram of the heat dissipation film along section line CC in FIG3 ;

[0035] FIG7D is another cross-sectional structural diagram of the heat dissipation film along section line CC in FIG3 ;

[0036] FIG8 is a structural diagram of a filling portion according to some embodiments;

[0037] FIG9 is another structural diagram of a filling portion according to some embodiments;

[0038] FIG10 is another structural diagram of a filling portion according to some embodiments;

[0039] FIG11 is another structural diagram of a filling portion according to some embodiments;

[0040] FIG12 is another structural diagram of a filling portion according to some embodiments;

[0041] FIG13A is a structural diagram of a first film layer structure according to some embodiments;

[0042] FIG13B is a structural diagram of a composite film layer according to some embodiments;

[0043] FIG14 is a structural diagram of a peripheral region and a filling portion according to some embodiments;

[0044] FIG15 is another structural diagram of a peripheral region and a filling portion according to some embodiments;

[0045] FIG16 is another structural diagram of the peripheral area and the filling portion according to some embodiments;

[0046] FIG17 is a structural diagram of a first film layer structure and a filling portion according to some embodiments;

[0047] FIG18 is another structural diagram of the first film layer structure and the filling portion according to some embodiments;

[0048] FIG19 is another structural diagram of the first film layer structure and the filling portion according to some embodiments;

[0049] FIG. 20 is another structural diagram of the first film layer structure and the filling portion according to some embodiments. DETAILED DESCRIPTION

[0050] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0051] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that a particular feature, structure, material or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0052] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0053] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates, for example, that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0054] “At least one of A, B and C” has the same meaning as “at least one of A, B or C” and both include the following combinations of A, B and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0055] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0056] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0057] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0058] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0059] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0060] It should be noted that, for example, 202 / 20 appearing in the drawings of the present disclosure indicates that component 202 belongs to component 20, and other similar numbers appearing in the drawings also follow the above description.

[0061] As shown in FIG1 , some embodiments of the present disclosure provide a display device 1000 . The display device 1000 can be any product or component with a display function, such as a television, a monitor, a laptop computer, a tablet computer, a mobile phone, or a navigator. FIG1 illustrates the display device 1000 as a mobile phone.

[0062] Exemplarily, the display device 1000 may be any device that displays an image, whether in motion (e.g., video) or stationary (e.g., still image), and whether textual or graphic. More specifically, it is contemplated that the embodiments described may be implemented in or associated with a variety of electronic devices, such as, but not limited to, mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., speedometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), and the like.

[0063] For example, the display device 1000 may be a liquid crystal display (LCD); the display device may also be an electroluminescent display or a photoluminescent display. If the display device is an electroluminescent display, the electroluminescent display may be an organic light-emitting diode (OLED) or a quantum dot light-emitting diode (QLED). If the display device is a photoluminescent display, the photoluminescent display may be a quantum dot photoluminescent display.

[0064] Figure 2 is a cross-sectional view of the display device 1000 along section line DD in Figure 1. As shown in Figure 2, the display device 1000 includes a display module 100 and a backing film 200. The display module 100 includes a display panel 10. The display panel 10 includes a display portion 101, a bending portion 102, and a binding portion 103, which are connected in sequence.

[0065] It should be noted that the display unit 101 is configured to display images. The display unit 101 has a display side 101a and a non-display side 101b. The display side 101a of the display unit 101 refers to the side of the display unit 101 used to display images, and the non-display side 101b of the display unit 101 refers to the side of the display unit 101 facing away from the display side 101a.

[0066] The bending portion 102 is bendable, and through the bending action of the bending portion 102, the binding portion 103 is arranged on the non-display side 101b of the display portion 101. In order to realize the bending of the bending portion 102 of the display panel 10, the display panel 10 in this embodiment can be a flexible display panel, which is made of a flexible material. The selected flexible material can be made of polymer materials such as polyethylene terephthalate, polyarylethersulfone, polyethylene naphthalate, polyimide, etc. It should be noted that the present disclosure does not specifically limit the material of the flexible display panel. No matter what material is selected (including all flexible materials that can be used as flexible substrates in the prior art), it needs to have a certain degree of stretchability to form a flexible display substrate. In the specific preparation process, it is necessary to select a flexible material that meets the stretchability requirements based on the actual needs of the display panel 10.

[0067] For example, the display panel 10 may be bent by the bending portion 102, while the display portion 101 and the binding portion 103 on either side thereof remain unbent. Alternatively, the display panel 10 may be bent by the bending portion 102 with a large bend, while a portion of the display portion 101 near its edge may be slightly bent, thereby forming a curved display device.

[0068] As shown in FIG2 , the binding portion 103 may include a driver chip 50. The driver chip 50 may, for example, include a source driver chip for outputting display signals to the data display. The driver chip 50 may be mounted on a side of the binding portion 103 away from the display portion 101 through a binding process, thereby achieving a narrow bezel design for the display portion 101.

[0069] 2 , the backing film 200 includes a first portion 200a and a second portion 200b . The first portion 200a of the backing film 200 is disposed on the non-display side of the display portion 101 , while the second portion 200b of the backing film 200 is disposed on the side of the binding portion 103 closer to the display portion 101 and closer to the display portion 101 than the binding portion 103 .

[0070] By setting the back film 200, when the display panel 10 is bent by the bending action of the bending portion 102 so that the binding portion 103 is set on the non-display side 101b of the display portion 101, the back film 200 can provide supporting force to the display portion 101 and the binding portion 103 of the display panel 10 to achieve a better bending effect.

[0071] For example, the material of the back film 200 may be one of polyethylene terephthalate (PET), polyimide (PI), or cycloolefin polymer (COP).

[0072] For example, the display panel 10 and the back film 200 may be adhered to each other by using an optically clear adhesive (OCA), which helps to ensure the light transmittance of the display panel 10 .

[0073] In some embodiments, as shown in FIG2 , the display device 1000 may further include a cover plate 300 and an adhesive layer 400 . The cover plate 300 is disposed on the display side 101 a of the display portion 101 of the display panel 10 , and the adhesive layer 400 is disposed on a side of the cover plate 300 close to the display panel 10 , for adhering the cover plate 300 to the display panel 10 .

[0074] The cover plate 300 can isolate the display panel 10 from the external environment and provide protection for the display panel 10 .

[0075] Illustratively, the cover plate 300 may be a single-layer cover plate, or may be a multi-layer cover plate 300 laminated together by adhesive.

[0076] Exemplarily, the cover 300 can be a silicate glass cover, curved glass or ultra-thin glass; at the same time, the cover 300 can also be a flexible polymer film cover, which can be transparent polyimide or PET or polyurethane, etc., and can also be a combination of the above layers of polymer films, or a combination of polymer film and glass.

[0077] In some embodiments, the display device 1000 may further include an under-screen camera and an under-screen fingerprint sensor, so that the display device 1000 can realize various functions such as taking photos, recording videos, fingerprint recognition, or face recognition. There is no limitation to this, and adaptive design can be performed according to actual needs.

[0078] The structure of the display module 100 is described in detail below.

[0079] As shown in FIG. 2 , the display module 100 includes a display panel 10 .

[0080] For example, the display portion 101 of the display panel 10 may be a rectangular structure, a circular structure, or other shapes with corners, which is not specifically limited in the present disclosure.

[0081] It should be noted that the aforementioned "rectangular structure" means that the shape of the boundary of the display portion 101 is rectangular as a whole, but is not limited to a standard rectangle. That is, the "rectangle" here includes not only a basic rectangular shape, but also a shape similar to a rectangle taking into account process conditions. For example, the long side and the short side of the rectangle are curved at each intersection (i.e., at the corners), that is, the corners are smooth, so that the shape of the boundary of the display portion 101 in the plan view is a rounded rectangle.

[0082] The following embodiments take the display portion 101 as a rectangular structure as an example to schematically illustrate some embodiments of the present disclosure, but the implementation methods of the present disclosure include but are not limited to this, and the shape of the display portion 101 can also consider any other shape with corners.

[0083] 3 , the display portion 101 of the display panel 10 includes a display area AA. Since the display portion 101 is a rectangular structure, the display area AA is also a rectangular structure.

[0084] It should be noted that the display area AA of the display portion 101 of the display panel 10 is used to display images.

[0085] In order to realize the image display function of the display panel 10, a display device is formed in the display area AA of the display unit 101. For example, the display device can be an organic light emitting diode (OLED) device or a liquid crystal display device, which can be selected according to the actual needs of the user.

[0086] For example, when the display panel is an OLED display panel, the OLED display panel includes: an array substrate and a pixel defining layer located on the array substrate, wherein an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, an electron injection layer and a cathode are sequentially arranged in the pixel defining area of ​​the pixel defining layer.

[0087] When the display device is a liquid crystal display device, the liquid crystal display device includes an array substrate and a color filter substrate which are arranged in a cell-like manner, and a liquid crystal layer located between the array substrate and the color filter substrate.

[0088] The following takes the display panel 10 as an OLED display panel as an example to schematically illustrate some embodiments of the present disclosure, but the implementation methods of the present disclosure include but are not limited to this, and any other display panels can also be considered as long as the same technical concept is applied.

[0089] 4 , a plurality of pixel units P and wiring capable of applying electrical signals to the plurality of pixel units P are provided in the display area AA of the display portion 101. Each pixel unit P includes at least three sub-pixels. A sub-pixel is the smallest light-emitting unit in the display area AA.

[0090] Exemplarily, the plurality of pixel units P are arranged in multiple rows and columns.

[0091] In some examples, the multiple sub-pixels emit light of the same color, and the display portion 101 may further include a color filter layer disposed on the light-emitting side of the multiple sub-pixels.

[0092] For example, multiple sub-pixels emit white light, red light, green light, blue light or other color light. In this case, the color light emitted by the sub-pixels remains the same color light after passing through the color filter layer, or is converted into other color light and emitted. Therefore, when multiple sub-pixels emit the same color light, the display unit 101 can achieve multi-color light output.

[0093] In other examples, multiple sub-pixels emit light of different colors. For example, the multiple sub-pixels include red sub-pixels that emit red light, green sub-pixels that emit green light, and blue sub-pixels that emit blue light, thereby realizing multi-color light output of the display unit 101.

[0094] It should be noted that each pixel unit P includes at least three sub-pixels, that is, each pixel unit P may include three, four or more sub-pixels, and the multiple sub-pixels included in each pixel unit P may be a row, a column or a group of sub-pixels. A group of sub-pixels may be a plurality of sub-pixels adjacent to each other, and the adjacent multiple sub-pixels are arranged in a row, a column, an L-shape, a rectangle or a diamond, etc.

[0095] At the same time, the light emitting areas of the multiple sub-pixels included in each pixel unit P may be the same or different. The above is only an exemplary description and is not intended to limit the present disclosure. Adaptive design can be performed according to actual needs.

[0096] As shown in FIG4 , wiring capable of applying electrical signals to a plurality of pixel cells P may include a plurality of scan lines SL, a plurality of data lines DL, and the like. Each of the plurality of scan lines SL may extend in a first direction F1, and each of the plurality of data lines DL may extend in a second direction F2. The plurality of scan lines SL may be arranged, for example, in a plurality of rows to transmit scan signals to the pixel cells P, and the plurality of data lines DL may be arranged, for example, in a plurality of columns to transmit data signals to the pixel cells P. Each of the pixel cells P may be connected to a corresponding scan line SL among the plurality of scan lines SL and a corresponding data line DL among the plurality of data lines DL.

[0097] In some embodiments, as shown in FIG. 3 , the display portion 101 of the display panel 10 further includes a peripheral area AN surrounding the display area AA.

[0098] It should be noted that FIG3 uses the black bold solid line as an example to illustrate the boundary GG of the display area AA. The boundary GG of the display area AA may be formed by connecting the edges of the outermost pixel units P of the plurality of pixel units P within the display area AA, which are adjacent to the peripheral area AN. For example, the edges of the anodes of the outermost sub-pixels within the outermost pixel units P, which are adjacent to the peripheral area AN, may be connected to form the boundary GG of the display area AA.

[0099] It should be noted that FIG3 shows an example in which the peripheral area AN of the display portion 101 completely surrounds the display area AA, but the configuration of the peripheral area AN and the display area AA in the present application is not limited thereto. For example, the peripheral area AN may partially surround the display area AA.

[0100] As shown in Figure 3, since the display area AA is a rectangular structure, the peripheral area AN surrounding the display area AA is a rectangular ring structure. The peripheral area AN includes a first frame area M1 and a third frame area M3, a second frame area M2 and a fourth frame area M4, which are arranged opposite to each other. A first corner area N1 is provided between the first frame area M1 and the second frame area M2, a second corner area N2 is provided between the second frame area M2 and the third frame area M3, a third corner area N3 is provided between the third frame area M3 and the fourth frame area M4, and a fourth corner area N4 is provided between the fourth frame area M4 and the first frame area M1. That is, the first corner area N1, the second corner area N2, the third corner area N3 and the fourth corner area N4 correspond to the four corners of the peripheral area AN respectively.

[0101] The peripheral area AN of the display portion 101 may be used to provide peripheral circuits and signal lines of the display area AA.

[0102] Exemplarily, the peripheral circuit may include a panel crack detection (PCD) circuit, a gate drive circuit, and an electrostatic protection circuit. The panel crack detection circuit is used to detect whether there are cracks on the display panel extending from the boundary to the inside. The gate drive circuit is used to drive the pixel unit P to display an image. The electrostatic protection circuit (as shown by reference numeral 31 in FIG4 ) is used to derive static electricity from the signal lines in the display unit 101 to protect the signal lines in the display unit 101 from electrostatic damage. If the electrostatic protection circuit is not provided, it is easy to cause problems such as flickering and greening of the display unit 101.

[0103] As shown in FIG4 , the gate driver circuit 30 includes a plurality of cascaded GOA (Gate Driver on Array) circuits 32. The plurality of GOA circuits 32 may include, for example, a scan driver circuit and / or an emission driver circuit. The scan driver circuit is used to provide one or more electrical signals, such as scan signals (Scan signals), to the pixel unit P along a scan line SL; the emission driver is used to provide one or more electrical signals, such as emission control signals (EM signals), to the pixel unit P along a signal line, such as an emission control line.

[0104] The signal lines provided in the peripheral area AN may include signal lines required for the operation of the pixel unit P, VSS lines, and signal lines required for the operation of the gate driving circuit 30 .

[0105] The signal lines required for the operation of the pixel unit P may include, for example, a DC power line (vinit line) and the like.

[0106] The VSS line is connected to the cathode of the pixel unit P and provides the pixel unit P with a cathode signal.

[0107] The signal lines required for the gate driving circuit 30 to operate include, for example, a clock signal line (CLK), a high voltage signal line (VGH), a low voltage signal line (VGL), a start signal line (STV), and the like.

[0108] As shown in Figure 4, the signal lines set in the peripheral area AN also include connecting lines 33, which are used to connect multiple GOA circuits 32 and multiple pixel units P. For example, one GOA circuit 32 is electrically connected to a row of pixel units P through a connecting line 33 so as to provide Scan signals or EM signals to the row of pixel units P.

[0109] In some embodiments, as shown in Figure 3, at least one of the first border area M1, the second border area M2, the third border area M3 and the fourth border area M4 in the peripheral area AN is provided with one or more of the GOA circuit 32, the electrostatic protection circuit 31 and the connecting trace 33.

[0110] In other embodiments, as shown in Figures 3 and 4, at least one of the first corner area N1, the second corner area N2, the third corner area N3 and the fourth corner area N4 within the peripheral area AN is also provided with a GOA circuit 32, an electrostatic protection circuit 31 and a connecting trace 33, etc.

[0111] FIG4 is a schematic diagram illustrating the arrangement of the GOA circuit 32, the electrostatic protection circuit 31, and the connecting trace 33 in the fourth corner region N4 in FIG3. If the GOA circuit 32, the electrostatic protection circuit 31, and the connecting trace 33 are required to be arranged in the first corner region N1, the second corner region N2, and the third corner region N3 of the peripheral area AN, the arrangement thereof is the same as or similar to the arrangement of the GOA circuit 32, the electrostatic protection circuit 31, and the connecting trace 33 in the fourth corner region N4. Here, only the arrangement of the GOA circuit 32, the electrostatic protection circuit 31, and the connecting trace 33 in the fourth corner region N4 is illustrated.

[0112] When the driving mode of the pixel unit P in the display area AA in FIG4 is double-sided driving, the third corner area N3 also needs to be provided with a GOA circuit. The configuration mode of the GOA circuit is the same as or similar to the configuration mode of the GOA circuit 32 in the fourth corner area N4, and is not repeated here.

[0113] It is understood that the connection line 33 in Figure 4 extends linearly in a "Z" shape, and the connection line 33 can also extend linearly or in a curved shape. The embodiment of the present disclosure does not impose any specific limitation on the specific shape of the connection line 33.

[0114] The electrostatic protection circuit 31 may be disposed on a side of the fourth corner region N4 close to the fourth frame region M4 .

[0115] As shown in FIG2 , the display module 100 further includes a heat dissipation film 20. The heat dissipation film 20 is laminated on the non-display side 101b of the display portion 101 of the display panel 10 and disposed between the display portion 101 and the binding portion 103. It can dissipate heat and provide light shielding.

[0116] In some embodiments, as shown in FIG. 2 , the first portion 200 a of the back film 200 is closer to the display portion 101 than the heat dissipation film 20 .

[0117] Figure 3 illustrates a structural diagram of the display portion 101 and heat dissipation film 20 of the display panel 10 according to some embodiments. To facilitate illustration of the stacking relationship between the display portion 101 and the heat dissipation film 20, the display portion 101 is rendered transparent to expose the heat dissipation film 20 disposed on the non-display side 101b of the display portion 101. To facilitate differentiation between the display portion 101 and the heat dissipation film 20, the outermost solid line in Figure 3 represents the display portion 101 of the display panel 10, while the dashed line represents the heat dissipation film 20.

[0118] For example, referring to FIG. 3 , the distance d1 between the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 is 0 to 0.35 mm. In other words, the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 may overlap or substantially overlap, i.e., the shape and planar area of ​​the heat dissipation film 20 and the display portion 101 may be the same or substantially the same. For example, the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 may be within the edge of the display portion 101, and the maximum value of the distance d1 between the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 is 0.35 mm, i.e., the planar area of ​​the heat dissipation film 20 may be smaller than that of the display portion 101.

[0119] For example, the distance d1 between the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 may be: 0, 0.06 mm, 0.12 mm, 0.18 mm, 0.26 mm, 0.30 mm, or 0.35 mm.

[0120] FIG3 illustrates an example in which the distance d1 between each position of the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 is the same or similar. However, the manner in which the distance d1 between each position of the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 is set in this manner is not limited to this. For example, the distance d1 between each position of the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 may be different. For example, a portion of the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 may overlap or approximately overlap, and the distance d1 between another portion of the orthographic projection of the edge of the heat dissipation film 20 on the display portion 101 and the edge of the display portion 101 may be 0.26 mm, 0.30 mm, or 0.35 mm.

[0121] It should be noted that, in order to prevent light leakage from the display area AA of the display portion 101 , the orthographic projection of the heat dissipation film 20 on the display portion 101 needs to completely cover the display area AA of the display portion 101 .

[0122] Exemplarily, the heat dissipation film 20 may be a rectangular structure, a circular structure, or other shapes with corners, as long as it can dissipate heat for the display unit 101 and completely cover the display area AA of the display unit 101. This disclosure does not impose any specific limitation on this.

[0123] Based on the rectangular structure of the display portion 101, the heat dissipation film 20 can be a rectangular structure with the same or similar shape as the display portion 101. The following uses the heat dissipation film 20 with the same or similar shape as the display portion 101 as an example to schematically illustrate some embodiments of the present disclosure. However, the embodiments of the present disclosure include but are not limited to this, and the shape of the heat dissipation film 20 can also consider any other shape with corners.

[0124] In some embodiments, the side of the heat dissipation film 20 close to the bending portion 102 and the binding portion 103 of the display panel 10 can extend toward the bending portion 102 and the binding portion 103 of the display panel 10 to facilitate heat dissipation of the bending portion 102 and the binding portion 103 of the display panel 10.

[0125] The structure of the heat dissipation film 20 will be described in detail below.

[0126] As shown in Figure 5, a structural diagram of the display portion 101 and heat dissipation film 20' of a display panel 10, as provided in related art, is shown. To facilitate illustration of the stacking relationship between the display portion 101 and the heat dissipation film 20', the display portion 101 is made transparent to expose the heat dissipation film 20' disposed on the non-display side 101b of the display portion 101. To facilitate differentiation between the display portion 101 and the heat dissipation film 20', the outermost solid line in Figure 5 represents the display portion 101 of the display panel 10, while the dashed line represents the heat dissipation film 20'.

[0127] Figure 6 is a cross-sectional view of the display unit 101 and heat dissipation film 20' along section line BB in Figure 5. As shown in Figure 6, heat dissipation film 20' includes a metal layer 201, a foam layer 2021b, and an adhesive layer 2021a, which are stacked in sequence. The adhesive layer 2021a is connected to the non-display side 101b of the display unit 101.

[0128] Narrowing the border is currently an important development direction for the display panel 10. As the border of the display panel 10 continues to narrow, the area of ​​the peripheral area AN of the display portion 101 gradually decreases. The area within the peripheral area AN where peripheral circuits (such as gate drive circuits, electrostatic protection circuits, and PCD circuits), signal lines (such as vinit lines and VSS lines), and connection lines used to connect the gate drive circuits and pixel units are arranged is continuously compressed. Under high brightness conditions of the display panel 10, the heat generated in the peripheral area AN increases, making it difficult to dissipate the heat generated in the peripheral area AN. This leads to heat accumulation in the peripheral area AN, increasing the temperature, and further shortening the life of the light-emitting devices in the display area AA adjacent to the peripheral area AN. This causes uneven display in the display area AA, affecting the display quality.

[0129] Based on this, as shown in Figures 7A to 7D, which are cross-sectional views of the display portion 101 and heat dissipation film 20 along section line CC in Figure 3, the heat dissipation film 20 includes a stacked metal layer 201 and a composite film layer 202. The metal layer 201 is further away from the display portion 101 than the composite film layer 202. The composite film layer 202 includes a first film layer structure 2021 and a filling portion 2022. Both the first film layer structure 2021 and the filling portion 2022 are connected to the metal layer 201.

[0130] The orthographic projection of the first film layer structure 2021 on the display portion 101 covers at least the display area AA, the orthographic projection of the filling portion 2022 on the display portion 101 covers at least part of the peripheral area AN, and the thermal conductivity of the filling portion 2022 is greater than the thermal conductivity of the first film layer structure 2021.

[0131] By providing the first film layer structure 2021 and the filling portion 2022, and the thermal conductivity of the filling portion 2022 is greater than the thermal conductivity of the first film layer structure 2021, the orthographic projection of the filling portion 2022 on the display portion 101 covers at least a portion of the peripheral area AN. In this way, the heat generated by the circuits in the peripheral area AN can be conducted to the metal layer 201 through the filling portion 2022 and dissipated through the metal layer 201, which is conducive to improving the heat dissipation efficiency of the peripheral area AN and minimizing the possibility of display abnormalities of the display panel 10 due to poor heat dissipation.

[0132] For example, FIG7A to FIG7D illustrate that the edge of the orthographic projection of the metal layer 201 on the plane where the composite film layer 202 is located coincides or substantially coincides with the edge of the composite film layer 202. However, in the present disclosure, the positional relationship between the edge of the orthographic projection of the metal layer 201 on the plane where the composite film layer 202 is located and the edge of the composite film layer 202 is not limited to this. For example, at least a portion of the edge of the orthographic projection of the metal layer 201 on the plane where the composite film layer 202 is located can be positioned inward of the edge of the composite film layer 202. In other words, a retracted design of the metal layer 201 relative to the composite film layer 202 is achieved.

[0133] Because the heat dissipation film 20 has a laminated structure, the production process typically involves bonding the individual layers over a large area before cutting to obtain the heat dissipation film 20 suitable for bonding to the display panel 10. During cutting, the advance and retreat of the cutting tool can affect the adhesion at the edges of the heat dissipation film 20 (i.e., separation of some of the laminated layers at the edges of the heat dissipation film 20). By designing the metal layer 201 to be recessed relative to the composite film layer 202 during cutting, the impact of the advance and retreat of the cutting tool on the adhesion at the edges of the heat dissipation film 20 can be reduced, thereby improving the yield of the heat dissipation film 20.

[0134] In some embodiments, the metal layer 201 may be copper or aluminum, which can provide electromagnetic shielding and heat dissipation.

[0135] In some embodiments, as shown in FIG. 7A , the first film layer structure 2021 includes a stacked adhesive layer 2021 a and a foam layer 2021 b , wherein the foam layer 2021 b is closer to the metal layer 201 than the adhesive layer 2021 a .

[0136] The foam layer 2021 b can buffer external forces and reduce damage to the display panel 10 caused by the bonding pressure during the bonding process between the heat dissipation film 20 and the display panel 10 .

[0137] Exemplarily, the adhesive layer 2021a can be a grid adhesive layer, which can apply pressure through the grid to imprint vertical and horizontal grids on the adhesive surface, thereby preventing curling caused by shrinkage of the adhesive layer and enhancing the tightness of the foam layer 2021b and the display panel 10; it can also avoid the generation of bubbles, bulging and other adverse phenomena when the foam layer 2021b is attached to the display part 101 of the display panel 10.

[0138] In other embodiments, as shown in Figures 7B to 7D, the first film layer structure 2021 also includes a supporting layer 2021d, which is beneficial to further improve the overall strength of the first film layer structure 2021, reduce the probability of deformation of the first film layer structure 2021, and further reduce the probability that the display portion 101 of the display panel 10 and the corresponding area of ​​the first film layer structure 2021 are also deformed due to the deformation of the first film layer structure 2021, thereby improving the poor molding of the display panel 10.

[0139] For example, as shown in FIG. 7B , the support layer 2021 d may be disposed between the adhesive layer 2021 a and the foam layer 2021 b .

[0140] For another example, as shown in FIG7C , the support layer 2021 d may also be disposed between the foam layer 2021 b and the metal layer 201 .

[0141] For another example, as shown in FIG7D , a support layer 2021 d may be provided between the adhesive layer 2021 a and the foam layer 2021 b , and between the foam layer 2021 b and the metal layer 201 .

[0142] In some embodiments, as shown in FIG. 13A , an edge of the first film layer structure 2021 has a notch 2021 c .

[0143] For example, the shape of the orthographic projection of the notch 2021c on the metal layer 201 can be circular, arc-shaped, sector-shaped, or polygonal, etc. In specific application scenarios, simulation can be performed according to actual needs to obtain the optimal shape, and targeted settings can be made based on this.

[0144] Illustratively, the method for forming the notch 2021 c on the first film layer structure 2021 may be to cut the first film layer structure 2021 , thereby removing a portion of the first film layer structure 2021 to obtain the notch 2021 c .

[0145] As shown in FIG13B , the filling portion 2022 is disposed within the notch 2021c and connects to the side surface of the first film structure 2021 at the notch 2021c. The side surface of the first film structure 2021 outside the notch 2021c forms a smooth transition with the side surface of the filling portion 2022 away from the display area AA. In other words, the shape of the filling portion 2022 is consistent with that of the notch 2021c, and the dimensions are substantially the same, so that the filling portion 2022 fills the notch 2021c.

[0146] Exemplarily, when the shape of the orthographic projection of the notch 2021c on the metal layer 201 is one of the shapes such as circle, arc, sector and polygon, the filling portion 2022 is also one of the shapes such as circle, arc, sector and polygon that is adapted to the notch 2021c.

[0147] For example, the filling portion 2022 may be prepared by profiling a portion of the first film layer structure 2021 removed when the first film layer structure 2021 is cut to obtain the notch 2021c, thereby obtaining the filling portion 2022 adapted to the notch 2021c.

[0148] Due to possible errors in the production process of the filling portion 2022, the surface of the filling portion 2022 away from the metal layer 201 and the surface of the first film structure 2021 away from the metal layer 201 may not be in the same plane. For example, the surface of the filling portion 2022 away from the metal layer 201 may be closer to or farther away from the display portion 101 than the surface of the first film structure 2021 away from the metal layer 201.

[0149] When the surface of the filling portion 2022 away from the metal layer 201 is closer to the display portion 101 than the surface of the first film structure 2021 away from the metal layer 201 , the display device in the display area AA may be damaged.

[0150] Based on this, as shown in FIG3 , to avoid damaging the display device, a distance d3 is provided between the orthographic projection of the filling portion 2022 on the display portion 101 and the edge of the display area AA. That is, the orthographic projection of the filling portion 202 on the display portion 101 and the display area AA do not overlap, and the orthographic projection of the edge of the filling portion 202 on the display portion 101 and the edge of the display area AA do not overlap.

[0151] In some embodiments, please continue to refer to Figure 3, with the side edge of the filling portion 2022 away from the display area AA as the outer edge of the filling portion 2022, and the distance d2 between the orthographic projection of the outer edge of the filling portion 2022 on the display portion 101 and the edge of the display area AA is the same as the distance d1 between the orthographic projection of the edge of the aforementioned heat dissipation film 20 on the display portion 101 and the edge of the display portion 101, and is also set to 0 to 0.35 mm.

[0152] For example, the distance d2 between the orthographic projection of the outer edge of the filling portion 2022 on the display portion 101 and the edge of the display area AA can be: 0, 0.06 mm, 0.12 mm, 0.18 mm, 0.26 mm, 0.30 mm, or 0.35 mm.

[0153] 3 , the filling portion 2022 may be made of at least one of thermally conductive silicone and graphite. Since both thermally conductive silicone and graphite have higher thermal conductivity than foam, they can improve the heat dissipation efficiency of the peripheral area AN of the display portion 101 .

[0154] For example, as shown in FIG. 7A to FIG. 7D , the material of the filling portion 2022 may include one of thermally conductive silicone and graphite; as shown in FIG. 8 and FIG. 9 , the material of the filling portion 2022 may also include both thermally conductive silicone and graphite.

[0155] When the material of the filling portion 2022 includes both thermally conductive silicone and graphite, the filling portion 2022 includes a thermally conductive silicone layer 2022 a and a graphite layer 2022 b .

[0156] Figure 8 is a cross-sectional view of the filling portion 2022 along section line CC in Figure 3. As shown in Figure 8 , the thermally conductive silicone layer 2022a and the graphite layer 2022b may be stacked along a first direction X perpendicular to the display portion 101.

[0157] FIG9 illustrates the structure of the filling portion 2022 in FIG3 within region D, when the filling portion 2022 includes both a thermally conductive silicone layer 2022a and a graphite layer 2022b. As shown in FIG9 , the thermally conductive silicone layer 2022a and the graphite layer 2022b may be arranged side by side and connected to each other along a second direction Y parallel to the display portion 101, for example.

[0158] It should be noted that while Figures 8 and 9 illustrate an alternate stacking of a single thermally conductive silicone layer 2022a and a single graphite layer 2022b, the stacking of the thermally conductive silicone layers 2022a and graphite layers 2022b in the present disclosure is not limited thereto. For example, multiple thermally conductive silicone layers 2022a and multiple graphite layers 2022b may be alternately stacked, or one or more graphite layers 2022b may be disposed between two thermally conductive silicone layers 2022a.

[0159] The thickness of the thermally conductive silicone layer 2022a and the graphite layer 2022b can be the same, but the thickness setting of the thermally conductive silicone layer 2022a and the graphite layer 2022b in the present disclosure is not limited to this. For example, there can be a difference in thickness between the thermally conductive silicone layer 2022a and the graphite layer 2022b.

[0160] In some embodiments, as shown in FIG. 10 to FIG. 12 , a surface of the filling portion 2022 away from the metal layer 201 is a first surface 2022 c , and the first surface 2022 c has a sawtooth and / or wavy morphology.

[0161] The first surface 2022c is connected to the display portion 101 of the display panel 10. By setting the first surface 2022c to have a serrated and / or wavy morphology, it is beneficial to increase the specific surface area between the first surface 2022c and the display portion 101, improve the thermal conductivity efficiency, and further avoid heat accumulation in the peripheral area AN of the display portion 101.

[0162] 10 , the cross section of the first surface 2022 c in the first direction X may be sawtooth-shaped, wherein the sawtooth shape may be, for example, square sawtooth or triangular sawtooth.

[0163] As shown in FIG. 11 , the cross section of the first surface 2022 c in the first direction X may also be wavy.

[0164] As shown in FIG12 , the cross section of the first surface 2022 c in the first direction X may also be alternately serrated and wavy, wherein the serrated shape may be, for example, square serrations or triangular serrations.

[0165] In some embodiments, as shown in FIG17 , FIG17 is a planar structural diagram of the first film layer structure 2021 and the filling portion 2022 according to some embodiments. The X-direction and the Y-direction are two mutually perpendicular directions in the coordinate system. The plane defined by the X-direction and the Y-direction is a reference plane. The reference plane is parallel to the first film layer structure 2021 and the filling portion 2022. The orthographic projection of the connection interface FF between the first film layer structure 2021 and the filling portion 2022 on the reference plane is a smooth arc surface.

[0166] To further enhance the connection strength between the first membrane structure 2021 and the filling portion 2022, as well as the stability of the connection interface FF between the first membrane structure 2021 and the filling portion 2022, in other embodiments, as shown in Figures 18 to 20, which are enlarged schematic views of region E in Figure 17, the orthographic projection of the connection interface FF between the first membrane structure 2021 and the filling portion 2022 on the reference plane may also be serrated or wavy, for example. That is, the first membrane structure 2021 and the filling portion 2022 are mutually engaged at the connection interface FF, which facilitates enhancing the stability of the connection interface FF.

[0167] For example, as shown in FIG18 , the orthographic projection of the connection interface FF between the first film layer structure 2021 and the filling portion 2022 on the reference plane is arranged in a triangular sawtooth shape.

[0168] For another example, as shown in FIG19 , the orthographic projection of the connection interface FF between the first film layer structure 2021 and the filling portion 2022 on the reference plane is arranged in a square sawtooth shape.

[0169] For another example, as shown in FIG20 , the orthographic projection of the connection interface FF between the first film layer structure 2021 and the filling portion 2022 on the reference plane is arranged in a wavy shape.

[0170] When the heat dissipation film 20 is a rectangular structure, the composite film layer 202 is also a rectangular structure similar to the heat dissipation film 20. Specifically, as shown in FIG3 , the composite film layer 202 can be a rounded rectangular structure within the rectangular structure.

[0171] As the border of the display panel 10 continues to narrow, the area of ​​the peripheral area AN of the display portion 101 gradually decreases, and the areas of the first corner area N1, the second corner area N2, the third corner area N3 and the fourth corner area N4 in the peripheral area AN also gradually decrease. When any one or more of the first corner area N1, the second corner area N2, the third corner area N3 and the fourth corner area N4 are simultaneously provided with the GOA circuit 32, the connecting trace 33 and the electrostatic protection circuit 31, the area of ​​the GOA circuit 32, the connecting trace 33 and the electrostatic protection circuit 31 is continuously compressed. Under the high brightness condition of the display panel 10, the heat generated by the GOA circuit 32, the connecting trace 33 and the electrostatic protection circuit 31 increases and is difficult to dissipate, resulting in heat accumulation and temperature increase in the corner area where the GOA circuit 32, the connecting trace 33 and the electrostatic protection circuit 31 are located, and further causing the life of the light-emitting device in the display area AA adjacent to the corner area to decrease, resulting in uneven display of the picture in the display area AA, affecting the display effect.

[0172] Based on this, in some embodiments, as shown in FIG3 , the filling portion 2022 is disposed at at least one corner of the composite film layer 202. FIG3 illustrates an example in which the filling portion 2022 can be disposed at two corners of the composite film layer 202. The orthographic projections of these two corners on the display portion 101 overlap with the third corner region N3 and the fourth corner region N4 within the peripheral area AN. This allows heat to be dissipated from the third corner region N3 and the fourth corner region N4 within the peripheral area AN, preventing heat accumulation in these regions and improving the display quality of the display area AA.

[0173] Exemplarily, the filling portion 2022 can also be set at any corner of the composite film layer 202, and the positive projection of the corner on the display portion 101 overlaps with one of the first corner area N1, the second corner area N2, the third corner area N3 and the fourth corner area N4 in the peripheral area AN.

[0174] The filling portion 2022 can also be arranged at any three corners of the composite film layer 202, and the positive projections of the above three corners on the display portion 101 overlap with three of the first corner area N1, the second corner area N2, the third corner area N3 and the fourth corner area N4 in the peripheral area AN.

[0175] The filling portions 2022 may also be provided at any four corners of the composite film layer 202, where the orthographic projections of these four corners on the display portion 101 overlap with four of the first corner region N1, the second corner region N2, the third corner region N3, and the fourth corner region N4 within the peripheral area AN. This allows heat to be dissipated from the overlapping corner regions within the peripheral area AN, preventing heat accumulation within these regions and improving the display quality of the display area AA.

[0176] The filling portion 2022 can also be set in a partial area of ​​the frame of the composite film layer 202, and the positive projection of this area on the display part 101 overlaps with the first frame area M1 and the third frame area M3 in the peripheral area AN, and partial areas of the second frame area M2 and the fourth frame area M4.

[0177] The filling portion 2022 can also be provided in the entire area and four corners of the composite film layer 202 frame. Specifically, the filling portion 2022 is a rectangular ring surrounding the outside of the first film layer structure 2021, and its orthographic projection on the display portion 101 overlaps with the peripheral area AN. This allows heat to be dissipated from the overlapping area within the peripheral area AN, preventing heat accumulation in that area and improving the display quality of the display area AA.

[0178] In some embodiments, as shown in FIG3 , when the filling portion 2022 is disposed at a corner of the composite film layer 202, the orthographic projection of the filling portion 2022 on the display portion 101 may be substantially arc-shaped. That is, the shape of the filling portion 2022 is the same as or similar to the shapes of the first corner region N1, the second corner region N2, the third corner region N3, and the fourth corner region N4 within the peripheral area AN.

[0179] It should be noted that "substantially arc-shaped" means that the shape of the orthographic projection boundary of the filling portion 2022 on the display portion 101 is generally arc-shaped, but is not limited to a standard arc shape. In other words, the "arc-shaped" here refers to a shape similar to an arc. For example, the two sides of the arc are straight, and the two sides are curved at the intersection (i.e., the corner), that is, the corner is smooth.

[0180] The filling portion 2022 is mainly used to dissipate heat generated by the peripheral circuits and connecting wires in the peripheral area AN of the display portion 101 during operation. The corresponding relationship between the GOA circuit 32, connecting wires 33 and electrostatic protection circuit 31 in the peripheral area AN and the orthographic projection of the filling portion 2022 on the peripheral area AN can be designed as follows:

[0181] In some embodiments, the orthographic projection of the filling portion 202 on the peripheral area AN covers at least a portion of the GOA circuit, so as to dissipate heat for the GOA circuit in the peripheral area AN.

[0182] For example, the orthographic projection of the filling portion 202 on the peripheral area AN may cover a portion of the GOA circuit or the entire GOA circuit.

[0183] In other embodiments, the orthographic projection of the filling portion 202 on the display portion 101 may also cover part or all of the connecting traces 33 to dissipate heat from the connecting lead region within the peripheral area AN.

[0184] In other embodiments, the orthographic projection of the display portion 101 on the display portion 101 may also cover at least a portion of the electrostatic protection circuit 31 .

[0185] Illustratively, the orthographic projection of the filling portion 202 on the peripheral area AN may cover a portion of the electrostatic protection circuit 31 or the entire electrostatic protection circuit 31 .

[0186] 14 to 16 , the following describes, as an example, the correspondence between the orthographic projection of the filling portion 2022 on the fourth corner area N4 and the electrostatic protection circuit 31, the GOA circuit 32, and the connecting trace 33 in the fourth corner area N4 when the composite film layer 202 is provided with a filling portion 2022 at the corner of the fourth corner area N4 corresponding to the peripheral area AN.

[0187] It should be noted that, in order to facilitate the explanation of the correspondence between the orthographic projection of the filling portion 2022 on the fourth corner area N4 and the electrostatic protection circuit 31, the GOA circuit 32 and the connecting trace 33 in the fourth corner area N4, the orthographic projection of the filling portion 2022 on the fourth corner area N4 is made transparent, and in order to facilitate the distinction between the filling portion 2022 and the fourth corner area N4, the area surrounded by dotted lines in Figures 14 to 16 is the filling portion 2022 of the composite film layer 202.

[0188] In some embodiments, as shown in FIG. 14 , the orthographic projection of the filling portion 202 on the fourth corner region N4 covers at least a portion of the GOA circuit 32 , so as to dissipate heat for the GOA circuit 32 in the fourth corner region N4 .

[0189] Exemplarily, the orthographic projection of the filling portion 202 on the fourth corner region N4 may cover a portion of the GOA circuit 32 or the entire GOA circuit 32 .

[0190] In other embodiments, as shown in FIG. 15 , the orthographic projection of the filling portion 202 on the fourth corner region N4 may also cover a portion of the connecting trace 33 , so as to dissipate heat from the connecting trace 33 region within the fourth corner region N4 .

[0191] It can be understood that since the connecting line 33 connects the pixel unit P in the display area AA, that is, the end of the connecting line 33 may overlap with the display area AA, and in order to avoid damaging the display device in the pixel unit P, the orthographic projection on the fourth corner area N4 of the filling portion 2022 covers part of the connecting line 33, so that there is a spacing d3 between the orthographic projection of the filling portion 2022 and the edge of the display area AA (see Figure 3), and the orthographic projection of the filling portion 202 does not cover the part of the connecting line 33 close to the display area AA, thereby avoiding damage to the display device in the pixel unit P.

[0192] In other embodiments, as shown in FIG16 , the orthographic projection of the filling portion 202 on the fourth corner area N4 may also cover at least a portion of the electrostatic protection circuit 31 to dissipate heat for the electrostatic protection circuit 31 in the fourth corner area N4 .

[0193] Illustratively, the orthographic projection of the filling portion 202 on the fourth corner region N4 may cover a portion of the electrostatic protection circuit 31 or may cover the entire electrostatic protection circuit 31 .

[0194] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display module, comprising: The display panel comprises a display portion for displaying a picture, wherein the display portion comprises a display area and a peripheral area surrounding the display area; A heat dissipation film is stacked on the non-display side of the display part; the heat dissipation film comprises a metal layer and a composite film layer stacked, the metal layer is farther away from the display part than the composite film layer; Wherein, the composite film layer comprises a first film layer structure and a filling portion, and the first film layer structure and the filling portion are both connected to the metal layer; The orthographic projection of the first film layer structure on the display portion at least covers the display area, the orthographic projection of the filling portion on the display portion at least covers a portion of the peripheral area, and the thermal conductivity of the filling portion is greater than the thermal conductivity of the first film layer structure.

2. The display module according to claim 1, wherein: The first film layer structure comprises a bonding layer and a foam layer which are stacked, and the foam layer is closer to the metal layer than the bonding layer; The material of the filling part includes at least one of thermally conductive silicone and graphite.

3. The display module according to claim 2, wherein: The filling portion includes a thermally conductive silicone layer and a graphite layer, wherein the thermally conductive silicone layer and the graphite layer are stacked in a direction perpendicular to the display portion, or the thermally conductive silicone layer and the graphite layer are arranged side by side on a plane parallel to the display portion and are connected to each other.

4. The display module according to any one of claims 1 to 3, wherein: A surface of a side of the filling portion away from the metal layer has a sawtooth and / or wavy morphology.

5. The display module according to any one of claims 1 to 4, wherein: The edge of the first film layer structure has a notch, the filling portion is arranged in the notch, and is connected to the side surface of the first film layer structure at the notch.

6. The display module according to claim 5, wherein: The side surface of the first film layer structure outside the notch and the side surface of the filling portion away from the display area are smoothly transitioned.

7. The display module according to any one of claims 1 to 6, wherein: The composite film layer is a rectangular structure, and the filling portion is at least arranged at a corner of the composite film layer.

8. The display module according to claim 7, wherein: The display panel further comprises a bending portion and a binding portion arranged on at least one side of the display portion, wherein the display portion, the bending portion and the binding portion are sequentially connected; The filling portion is arranged at two corners of the composite film layer at both ends of the side edges corresponding to the bending portion and the binding portion.

9. The display module according to claim 7 or 8, wherein: The orthographic projection of the filling portion on the display portion is substantially arc-shaped.

10. The display module according to any one of claims 1 to 9, wherein: The display portion includes a plurality of pixel units arranged in the display area, and a gate driving circuit and a connecting wire arranged in the peripheral area; the connecting wire is located between the gate driving circuit and the display area, and is used to connect the gate driving circuit and the plurality of pixel units; The orthographic projection of the filling portion on the display portion covers at least a portion of the gate driving circuit.

11. The display module according to claim 10, wherein: The orthographic projection of the filling portion on the display portion covers a portion of the connecting wire, or does not overlap with the connecting wire.

12. The display module according to claim 10 or 11, wherein: The display portion further includes an electrostatic protection circuit disposed in the peripheral area; The orthographic projection of the filling portion on the display portion at least covers a portion of the electrostatic protection circuit.

13. The display module according to any one of claims 1 to 12, wherein: There is a gap between the orthographic projection of the filling portion on the display portion and the display area.

14. The display module according to any one of claims 1 to 13, wherein: In an orthographic projection onto the display portion, a distance between an edge of the filling portion away from the display area and an edge of the display portion is 0 to 0.35 mm.

15. A heat dissipation film, comprising: Metal layer; A composite film layer is stacked on one side of the metal layer; The composite film layer includes a first film layer structure and a filling portion, the first film layer structure and the filling portion are both connected to the metal layer, and the thermal conductivity of the filling portion is greater than the thermal conductivity of the first film layer structure.

16. The heat dissipation film according to claim 15, characterized in that: The first film layer structure comprises a bonding layer and a foam layer which are stacked, and the foam layer is closer to the metal layer than the bonding layer; The material of the filling part includes at least one of thermally conductive silicone and graphite.

17. The heat dissipation film according to claim 15 or 16, characterized in that: The edge of the first film layer structure has a notch, the filling portion is arranged in the notch, and is connected to the side surface of the first film layer structure at the notch.

18. The heat dissipation film according to any one of claims 15 to 17, characterized in that: The composite film layer is a rectangular structure, the filling portion is at least arranged at a corner of the composite film layer, and the orthographic projection of the filling portion on the metal layer is substantially arc-shaped.

19. A display device comprising: The display module according to any one of claims 1 to 14, wherein the display panel in the display module comprises a display portion, a bending portion and a binding portion connected in sequence, and the binding portion is arranged on the non-display side of the display portion through the bending action of the bending portion; the heat dissipation film in the display module is arranged between the display portion and the binding portion; A back film comprises a first part and a second part; wherein the first part of the back film is arranged on the non-display side of the display part and is closer to the display part than the heat dissipation film, and the second part of the back film is arranged on the side of the binding part close to the display part and is closer to the display part than the binding part.

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