Heat dissipation module, display device and assembly method thereof

Abstract

The present disclosure provides a heat dissipation module, a display device and an assembly method thereof. When laminating the fingerprint recognition module in the first window area, it is inevitable to perform full lamination and degassing treatment. The degassing treatment requires a certain temperature and pressure. If the second window area is a sealed space, local thermal expansion and contraction of air will occur, resulting in the second protective film on the surface may be squeezed to the corresponding position of the display panel, causing problems such as breakage of the display panel or generation of optical stripes. In order to prevent the second window area from forming a sealed space during the degassing treatment, an exhaust channel is provided between the edge of the second window area B and the heat dissipation film. Through the exhaust channel, the hot air formed in the second window area during the degassing process can be effectively released to the outside of the heat dissipation module, which can effectively improve the defects in the second window area and is beneficial to improving the lamination yield.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a heat dissipation module, a display device, and an assembly method thereof. Background Art

[0002] With the rapid development of smart phones, there are not only requirements for the beautiful appearance of the phones, but also a need to bring a better visual experience to the phone users. Major manufacturers have started to increase the screen-to-body ratio on smart phones, making the full-screen a new competitive point in the smart phone competition. With the development of the full-screen, the demand for performance and function improvement is also increasing day by day. Under the premise of not affecting the high screen-to-body ratio, in-screen fingerprint and in-screen camera can bring a sense of impact in terms of vision and user experience to a certain extent. Summary of the Invention

[0003] An embodiment of the present disclosure provides a heat dissipation module, including:

[0004] A heat dissipation film, including a grid adhesive, a foam, and a metal film stacked;

[0005] A first release film, located on a side of the grid adhesive away from the foam;

[0006] A second release film, located on a side of the metal film away from the foam. The heat dissipation film and the second release film have a first window area and a second window area penetrating through the thickness direction, and there is an exhaust channel between the second window area and the edge of the heat dissipation film;

[0007] A first protective film, located on a side of the second release film away from the heat dissipation film, and covering the first window area;

[0008] A second protective film, located on a side of the second release film away from the heat dissipation film, and covering the second window area and the exhaust channel. The first protective film and the second protective film are independently provided.

[0009] In a possible implementation manner, in the above heat dissipation module provided by the embodiment of the present disclosure, the exhaust channel is a slot or a cut seam between the second window area and the edge of the heat dissipation film.

[0010] In a possible implementation manner, in the above heat dissipation module provided by the embodiment of the present disclosure, the exhaust channel is located between the second window area and the edge of the closest heat dissipation film, and the orthographic projection of the exhaust channel on the heat dissipation film is a straight line.

[0011] In a possible implementation manner, in the above heat dissipation module provided by the embodiment of the present disclosure, the exhaust channel penetrates through the second release film.

[0012] In a possible implementation, in the above heat dissipation module provided by the embodiments of the present disclosure, the exhaust channel penetrates the metal film of the heat dissipation film.

[0013] In a possible implementation, in the above heat dissipation module provided by the embodiments of the present disclosure, the exhaust channel penetrates the heat dissipation film.

[0014] In a possible implementation, in the above heat dissipation module provided by the embodiments of the present disclosure, the width of the exhaust channel in a direction perpendicular to the extension direction is less than or equal to 2 mm and greater than or equal to 0.

[0015] On the other hand, the embodiments of the present disclosure also provide a display device, including:

[0016] A display panel including a first light-transmitting area and a second light-transmitting area provided in a display area;

[0017] A heat dissipation film including a grid adhesive, a foam, and a metal film sequentially stacked on the back surface of the display panel, and having a first window area penetrating in the thickness direction in the first light-transmitting area, a second window area penetrating in the thickness direction in the second light-transmitting area, and an exhaust channel between the second window area and the edge of the heat dissipation film;

[0018] A first bonding module located on the back surface of the display panel and fixed to the first light-transmitting area through the first window area;

[0019] A second bonding module located on the back surface of the display panel and fixed to the second light-transmitting area through the second window area.

[0020] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the exhaust channel is a slotted or cut-off seam between the second window area and the edge of the heat dissipation film.

[0021] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the exhaust channel is located between the second window area and the edge of the nearest heat dissipation film, and the orthographic projection of the exhaust channel on the heat dissipation film is a straight line.

[0022] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the exhaust channel penetrates the metal film of the heat dissipation film.

[0023] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the exhaust channel penetrates the heat dissipation film.

[0024] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the width of the exhaust channel perpendicular to the extension direction is less than 2 mm and greater than or equal to 0 mm.

[0025] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the first bonding module is a fingerprint recognition module, and the second bonding module is a camera module.

[0026] In a possible implementation, in the above display device provided by the embodiments of the present disclosure, the display panel is an OLED display panel.

[0027] On the other hand, the embodiments of the present disclosure also provide an assembling method for a display device, including:

[0028] Providing a display panel, where the display panel has a first light-transmitting area and a second light-transmitting area in the display area;

[0029] Providing the above heat dissipation module provided by the embodiments of the present disclosure;

[0030] After removing the first release film of the heat dissipation module, bonding the grid adhesive of the heat dissipation film to the back of the display panel;

[0031] After removing the first protective film of the heat dissipation module, fixing the first bonding module in the first window area;

[0032] After fixing the first bonding module, performing a defoaming process, and discharging the gas pressure generated in the second window area by the defoaming process through the exhaust channel;

[0033] After removing the second protective film and the second release film of the heat dissipation module, fixing the second bonding module in the second window area.

[0034] In a possible implementation, in the above assembling method provided by the embodiments of the present disclosure, the first bonding module is a fingerprint recognition module, and the second bonding module is a camera module. Description of the Drawings

[0035] Figure 1 For the heat dissipation module provided by the embodiments of the present disclosure;

[0036] Figure 2 For Figure 1 A schematic cross-sectional structure diagram along aa in;

[0037] Figure 3 For Figure 1 Another schematic cross-sectional structure diagram along aa in;

[0038] Figure 4 For Figure 1Another schematic cross-sectional structure diagram along aa;

[0039] Figure 5 For Figure 1 Another schematic cross-sectional structure diagram along aa;

[0040] Figure 6 Another top-view structure diagram of the heat dissipation module provided by the present disclosure;

[0041] Figure 7 Another top-view structure diagram of the heat dissipation module provided by the present disclosure;

[0042] Figure 8 Another top-view structure diagram of the heat dissipation module provided by the present disclosure;

[0043] Figure 9 Top-view structure diagram of the display device provided by the present disclosure from the side of the heat dissipation film;

[0044] Figure 10 For Figure 9 A schematic cross-sectional structure diagram along bb;

[0045] Figure 11 For Figure 9 Another schematic cross-sectional structure diagram along bb;

[0046] Figure 12 For Figure 9 Another schematic cross-sectional structure diagram along bb;

[0047] Figure 13 Flow chart of the assembly method of the display device provided by the present disclosure;

[0048] Figure 14 Schematic diagram of the display panel provided in the assembly method of the display device provided by the present disclosure;

[0049] Figure 15 Schematic diagram after attaching the heat dissipation film to the back of the display panel in the assembly method of the display device provided by the present disclosure;

[0050] Figure 16 Schematic diagram of attaching the first bonding module to the back of the display panel in the assembly method of the display device provided by the present disclosure;

[0051] Figure 17 Schematic diagram after attaching the second bonding module to the back of the display panel in the assembly method of the display device provided by the present disclosure. Detailed implementation manners

[0052] At present, in full-screen display devices, the fingerprint recognition module and the camera module are both external modules that are attached to the display panel screen. Both require a reserved bonding area under the display panel screen. The difference is that the fingerprint recognition module must be fully bonded to the display panel screen in the fingerprint module factory, while the camera module can be assembled by the whole machine module factory. During the module manufacturing process, a heat dissipation film (SCF) composed of a multi-layer structure will be attached to the back of the display panel, and in order to fit the fingerprint recognition module and the camera module, a window design is required for the bonding area corresponding to the heat dissipation film. The size of the window is generally avoided according to the bonding and cutting tolerances. From the completion of the display panel to the bonding of the fingerprint recognition module or the camera module, in order to prevent the heat dissipation film from being affected by dirt, foreign matter or strong light in the window area, a protective film is generally used to cover and block the window area.

[0053] Since the fingerprint recognition module is fully laminated, the lamination bubbles will affect the fingerprint imaging, so it must go through the degassing process. In other window areas of the heat dissipation film that are not laminated, such as the window area corresponding to the camera module, the window area is covered by the protective film to form a closed environment. As a result, during the lamination and degassing process of the fingerprint recognition module, the closed environment will cause dents or optical mura problems due to the thermal expansion and contraction of the local enclosed gas.

[0054] In view of the above problems, the embodiments of the present disclosure provide a heat dissipation module, a display device and an assembly method thereof. In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the specific implementation methods of the heat dissipation module, the display device and the assembly method thereof provided by the embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure. And in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other.

[0055] The shapes and sizes of the components in the drawings do not reflect the actual proportions, and are only intended to illustrate the present disclosure.

[0056] The present disclosure provides a heat dissipation module, such as Figures 1 to 8 As shown, including:

[0057] The heat dissipation film 1 comprises a grid glue 11, a foam 12 and a metal film 13 which are stacked;

[0058] The first release film 2 is located on the side of the mesh glue 11 away from the foam 12;

[0059] The second release film 3 is located on the side of the metal film 13 away from the foam 12. The heat dissipation film 1 and the second release film 3 have a first window area A and a second window area B throughout the thickness direction, and an exhaust channel C is provided between the second window area B and the edge of the heat dissipation film 1;

[0060] The first protective film 4 is located on the side of the second release film 3 away from the heat dissipation film 1 and covers the first window area A.

[0061] The second protective film 5 is located on the side of the second release film 3 away from the heat dissipation film 1 and covers the second window area B and the exhaust channel C. The first protective film 4 and the second protective film 5 are independently arranged.

[0062] Specifically, in the above heat dissipation module provided by the embodiments of the present disclosure, the first release film 2 serves as a surface protective layer and is peeled off when the heat dissipation film 1 is attached to the back of the display panel, so that the grid adhesive 11 fixes the foam 12 to the back of the display panel. The foam 12 serves as a buffer layer to relieve the impact of external forces on the display panel during the assembly of the whole machine. The metal film 13 serves as the main heat dissipation layer for heat dissipation and is generally made of copper foil. The second release film 3 is attached to the surface of the metal film 13 to protect the metal film 13 and prevent the surface of the metal film 13 from being soiled before the assembly of the whole machine, which may affect the assembly of the whole machine. The second release film 13 is generally torn off during the assembly of the whole machine. Other film layers such as graphite may also be included in the heat dissipation film 1, which is not limited herein.

[0063] Specifically, the first window area A and the second window area B penetrating through the heat dissipation film 1 and the second release film 3 are provided to attach the corresponding under-display modules to the back of the display panel through different window areas. The number of window areas generally corresponds to the number of under-display modules to be attached. Generally, one window area corresponds to one under-display module. Specifically, the corresponding window areas can be set in the heat dissipation module according to the positions and numbers of the under-display modules to be attached to the back of the display panel. The difference between the first window area A and the second window area B lies in the different attachment sequences. When assembling the display device, the under-display module is first attached in the first window area A, and then the under-display module is attached in the second window area B. Specifically, the first window area A may correspond to the fingerprint recognition module to be attached first, and the second window area B may correspond to the camera module to be attached later.

[0064] Specifically, a first protective film 4 covering the first opening area A and a second protective film 5 covering the second opening area B are provided to prevent the first opening area A and the second opening area B from being exposed to dirt, foreign objects, strong light, etc. during the period from the completion of the production of the display panel to the bonding of the fingerprint recognition module or the camera module. The first protective film 4 and the second protective film 5 are independent of each other. Before bonding in the first opening area A, only the first protective film 4 can be torn off, while the second protective film 5 is retained to shield and protect the second opening area B. The first protective film 4 and the second protective film 5 are generally made of light-shielding materials, such as black tape. To achieve a better covering and shielding effect and to save materials and reduce costs, the first protective film 4 is generally slightly larger than the area of the first opening area A, and the second protective film 5 is generally slightly larger than the area of the second opening area B. Also, to prevent the exhaust passage C from being exposed to dirt, foreign objects, strong light, etc. from the side of the second release film 3, as Figure 1 shown, the second protective film 5 can also cover the exhaust passage C.

[0065] Since full bonding and degassing treatment are inevitably required when bonding the fingerprint module in the first opening area A, and the degassing treatment requires a certain temperature and pressure. If the second opening area B is a closed space, local thermal expansion and contraction of air will occur, resulting in the second protective film 5 on the surface may be squeezed to the corresponding position of the display panel, causing problems such as display panel fracture or optical stripes. To prevent the second opening area B from forming a sealed space during the degassing treatment, an exhaust passage C is provided between the edge of the second opening area B and the heat dissipation film 1. Through the exhaust passage C, the hot air formed in the second opening area B during the degassing process can be effectively released to the outside of the heat dissipation module, which can effectively improve the defects in the second opening area B and is beneficial to improving the bonding yield.

[0066] Specifically, when manufacturing the heat dissipation module provided in the embodiment of the present disclosure, after sequentially bonding the grid adhesive 11, the foam 12, and the metal film 13 to complete the production of the heat dissipation film 1, a first release film 2 can be bonded to the side of the grid adhesive 11 to protect the grid adhesive 11, and a second release film 3 can be bonded to the side of the metal film 13 to protect the metal film 13. Then, on the side of the second release film 3, through cutting or other means, a first opening area A and a second opening area B that penetrate the heat dissipation film 1 and the second release film 3 are formed, and the exhaust passage C can be formed simultaneously.

[0067] Optionally, in the heat dissipation module provided in the embodiment of the present disclosure, based on the above manufacturing method of the heat dissipation module, when manufacturing the exhaust passage C from the side of the second release film 3, as Figure 2 shown, the exhaust passage C can only penetrate the second release film 3, that is, the exhaust passage C is only formed in the second release film 3, and the respective film layers of the heat dissipation film 1 in the area below the exhaust passage C remain intact without being cut.

[0068] Further, optionally, in the heat dissipation module provided in the embodiments of the present disclosure, based on the manufacturing method of the above heat dissipation module, when manufacturing the exhaust channel C from one side of the second release film 3, as Figure 3 shown, the exhaust channel C can penetrate the metal film 13 of the heat dissipation film 1, that is, the exhaust channel C is only formed in the second release film 3 and the metal film 13, and the grid glue 11 and the foam 12 of the heat dissipation film 1 remain intact and are not cut in the area below the exhaust channel C.

[0069] Further, optionally, in the heat dissipation module provided in the embodiments of the present disclosure, based on the manufacturing method of the above heat dissipation module, when manufacturing the exhaust channel C from one side of the second release film 3, as Figure 4 shown, the exhaust channel C can penetrate the heat dissipation film 1, that is, the exhaust channel C is formed in the second release film 3 and the heat dissipation film 1 at the same time, that is, each film layer of the heat dissipation film 1 is cut in the area of the exhaust channel C, and only the first release film 2 remains intact.

[0070] Alternatively, optionally, in the heat dissipation module provided in the embodiments of the present disclosure, based on the manufacturing method of the above heat dissipation module, the exhaust channel C can also be manufactured from one side of the side edge of the heat dissipation module, that is, as Figure 5 shown, a channel leading to the second window area B can be formed from the side edge of the heat dissipation module. For example, Figure 5 shown, this channel can penetrate through the film layer where the foam 12 is located, for example, to the second window area B. According to the aperture of the channel, this channel can also penetrate through other adjacent film layers, which is not limited here.

[0071] Specifically, the larger and deeper the channel aperture of the exhaust channel C is, the better the exhaust effect is, but it is easier for the second window area B to be affected by dirt, foreign objects, strong light, etc. through the exhaust channel C. Therefore, when manufacturing the exhaust channel C, the film layer and width occupied by the exhaust channel C can be designed according to needs to meet the requirements.

[0072] Optionally, in the heat dissipation module provided in the embodiments of the present disclosure, as Figure 6 shown, the exhaust channel C can be a slot between the second window area B and the edge of the heat dissipation film 1, that is, a channel with a certain width is formed by cutting or the like in the orthographic projection of the heat dissipation film 1. Specifically, the width of the exhaust channel C in the direction perpendicular to the extension direction, that is, the slot width, is generally greater than 0 and less than 2 mm.

[0073] Alternatively, optionally, in the heat dissipation module provided in the embodiments of the present disclosure, as Figure 7 and Figure 8As shown, the exhaust passage C can be a cut slit between the second window area B and the edge of the heat dissipation film 1, that is, a cut slit is made between the second window area B and the edge of the heat dissipation film 1 by means of semi-punching. When there is no pressure generated in the second window area B and no exhaust is required, the width of the cut slit can be considered to be 0. When pressure is generated in the second window area B and exhaust is required, the gas will expand into the cut slit and be discharged along the exhaust passage C.

[0074] Specifically, since the shorter the channel length of the exhaust passage C, the better the exhaust effect. Therefore, optionally, in the heat dissipation module provided by the embodiments of the present disclosure, as Figure 6 and Figure 7 shown, the exhaust passage C can be located between the second window area B and the edge of the nearest heat dissipation film 1, and the orthographic projection of the exhaust passage C on the heat dissipation film 1 is a straight line, which is beneficial to the discharge of gas. Alternatively, the exhaust passage C can also be set between the second window area B and the edge of the second nearest heat dissipation film 1 according to design requirements, as Figure 8 shown, and no limitation is made here.

[0075] Based on the same inventive concept, a display device provided by the embodiments of the present disclosure, as Figures 9 to 12 shown, includes:

[0076] A display panel 100, including a first light-transmitting area 110 and a second light-transmitting area 120 provided in the display area;

[0077] A heat dissipation film 200, including a grid adhesive 210, a foam 220, and a metal film 230 stacked in sequence on the back of the display panel 100, and having a first window area A penetrating in the thickness direction in the first light-transmitting area 110, a second window area B penetrating in the thickness direction in the second light-transmitting area 120, and an exhaust passage C between the second window area B and the edge of the heat dissipation film 1;

[0078] A first bonding module 300, located on the back of the display panel 100 and fixed to the first light-transmitting area 110 through the first window area A;

[0079] A second bonding module 400, located on the back of the display panel 100 and fixed to the second light-transmitting area 120 through the second window area B.

[0080] Optionally, in the display device provided by the embodiments of the present disclosure, the display panel 100 can generally be an OLED display panel. Among them, the first light-transmitting area 110 and the second light-transmitting area 120 provided in the display area of the display panel refer to the parts of the light-transmitting areas where no light-shielding patterns are provided on each film layer, and light can pass through unobstructed.

[0081] Specifically, in the display device provided by the embodiments of the present disclosure, the grid glue 210 of the heat dissipation film 200 fixes the foam 220 to the back surface of the display panel 100. The foam 220 serves as a buffer layer to relieve the impact of external forces on the display panel 100 during the assembly of the whole machine. The metal film 230 serves as the main heat dissipation layer for heat dissipation and is generally made of copper foil. The heat dissipation film 200 may also include other film layers such as graphite, which is not limited herein.

[0082] Specifically, a first window area A and a second window area B penetrating through the heat dissipation film 200 are respectively provided corresponding to the first light-transmitting area A and the second light-transmitting area B, for attaching the corresponding under-screen module to the back surface of the display panel 100 through different window areas. The number of window areas generally corresponds to the under-screen modules to be attached. Generally, one window area corresponds to one under-screen module. Specifically, corresponding window areas can be set in the heat dissipation film 200 according to the positions and numbers of the under-screen modules to be attached to the back surface of the display panel. The difference between the first window area A and the second window area B lies in the different attachment sequences of the first attachment module 300 and the second attachment module 400. When assembling the display device, the first attachment module 300 is first attached in the first window area A, and then the second attachment module 400 is attached in the second window area B. Specifically, the first attachment module 300 can be fixed in the first light-transmitting area 110 using optical glue, and the second attachment module 400 can be fixed in the second light-transmitting area 120 using optical glue. Optionally, in the display device provided by the embodiments of the present disclosure, the first attachment module 300 is generally a fingerprint recognition module, and the second attachment module 400 is generally a camera module. The fingerprint recognition module can specifically be an ultrasonic fingerprint recognition module. Therefore, the first attachment module 300 needs to be attached to the first light-transmitting area 110 in a full-attachment manner.

[0083] Since it is inevitable to perform full attachment and degassing treatment when attaching the fingerprint recognition module 300 in the first window area A, and the degassing treatment requires a certain temperature and pressure. If the second window area B is a closed space, it will cause local thermal expansion and contraction of air, resulting in problems such as the second protective film 5 on the surface being squeezed to the corresponding position of the display panel, causing the display panel to break or generating optical stripes. To avoid the second window area B forming a sealed space during the degassing treatment, an exhaust channel C is provided between the second window area B and the edge of the heat dissipation film 200. Through the exhaust channel C, the hot air formed in the second window area B during the degassing process can be effectively released to the outside of the heat dissipation module, which can effectively improve the defects in the second window area B and is beneficial to improving the attachment yield.

[0084] Specifically, when manufacturing the heat dissipation film 200 in the display device provided in the embodiments of the present disclosure, after sequentially laminating the grid adhesive 210, the foam 220, and the metal film 230 to complete the production of the heat dissipation film 200, a first release film can be laminated on one side of the grid adhesive 210 to protect the grid adhesive 210, and a second release film can be laminated on one side of the metal film 230 to protect the metal film 230. Then, on one side of the second release film, through cutting or other means, a first window area A and a second window area B that penetrate the heat dissipation film 200 and the second release film can be formed, and an exhaust channel C can be formed simultaneously here.

[0085] Optionally, in the display device provided in the embodiments of the present disclosure, based on the manufacturing method of the above heat dissipation film 200, when manufacturing the exhaust channel C from one side of the second release film, as Figure 10 shown, the exhaust channel C can only penetrate the metal film 230 of the heat dissipation film 200, that is, the exhaust channel C is only formed in the metal film 230, and the grid adhesive 210 and the foam 220 of the heat dissipation film 200 remain intact and are not cut in the area below the exhaust channel C.

[0086] Furthermore, optionally, in the display device provided in the embodiments of the present disclosure, based on the manufacturing method of the above heat dissipation film 200, when manufacturing the exhaust channel C from one side of the second release film, as Figure 11 shown, the exhaust channel C can penetrate the heat dissipation film 200, that is, each film layer of the heat dissipation film 200 is cut in the area of the exhaust channel C, and only the first release film remains intact.

[0087] Alternatively, optionally, in the display device provided in the embodiments of the present disclosure, based on the manufacturing method of the above heat dissipation film 200, the exhaust channel C can also be manufactured from one side edge of the side surface of the heat dissipation film 200, that is, as Figure 12 shown, a channel leading to the second window area B can be formed from the side edge of the heat dissipation film 200. For example, as Figure 12 shown, this channel can penetrate through the film layer where the foam 220 is located, for example, to the second window area B. According to the aperture of the channel, this channel can also penetrate through other adjacent film layers, which is not limited here.

[0088] Specifically, the larger and deeper the channel aperture of the exhaust channel C is, the better the exhaust effect is, but it is easier for the second window area B to be affected by dirt, foreign objects, strong light, etc. through the exhaust channel C. Therefore, when manufacturing the exhaust channel C, the film layers occupied by the exhaust channel C and the width can be designed according to needs to meet the requirements.

[0089] Optionally, in the display device provided in the embodiments of the present disclosure, as Figure 6As shown, the exhaust channel C can be a slot between the second windowing area B and the edge of the heat dissipation film 200, that is, a channel with a certain width is formed by cutting or other means in the orthographic projection of the heat dissipation film 200. Specifically, the width of the exhaust channel C in the direction perpendicular to the extension direction, that is, the slot width, is generally greater than 0 and less than 2 mm.

[0090] Alternatively, optionally, in the display device provided in the embodiments of the present disclosure, as Figure 7 and Figure 8 shown, the exhaust channel C can be a cut-off seam between the second windowing area B and the edge of the heat dissipation film 200, that is, a cut-off seam is made between the second windowing area B and the edge of the heat dissipation film 200 by semi-punching. When there is no pressure generated in the second windowing area B and no exhaust is required, the width of the cut-off seam can be considered 0. When pressure is generated in the second windowing area B and exhaust is required, the gas will expand into the cut-off seam and be discharged along the exhaust channel C.

[0091] Specifically, since the shorter the channel length of the exhaust channel C, the better the exhaust effect. Therefore, optionally, in the display device provided in the embodiments of the present disclosure, as Figure 6 and Figure 7 shown, the exhaust channel C can be located between the second windowing area B and the edge of the nearest heat dissipation film 200, and the orthographic projection of the exhaust channel C on the heat dissipation film 200 is a straight line to facilitate gas discharge. Alternatively, the exhaust channel C can also be set between the second windowing area B and the edge of the second-nearest heat dissipation film 200 according to design requirements, as Figure 8 shown, which is not limited herein.

[0092] Based on the same inventive concept, in the assembly method of the display device provided in the embodiments of the present disclosure, as Figure 13 shown, includes the following steps:

[0093] S101. Provide a display panel, the display panel has a first light-transmitting area and a second light-transmitting area in the display area, as Figure 14 shown;

[0094] S102. Provide the above heat dissipation module provided in the embodiments of the present disclosure, for example Figure 4 the structure shown;

[0095] S103. After removing the first release film of the heat dissipation module, bond the grid glue of the heat dissipation film to the back of the display panel, as Figure 15 shown;

[0096] S104. After removing the first protective film of the heat dissipation module, fix the first bonding module in the first windowing area, as Figure 16 shown; the first bonding module is generally a fingerprint recognition module;

[0097] S105. After fixing the first bonding module, perform a degassing process, and discharge the gas pressure generated in the second window area during the degassing process through the exhaust passage;

[0098] S106. After removing the second release film and the second protective film of the heat dissipation module, fix the second bonding module in the second window area. As Figure 17 shown, it should be noted that the second protective film will be removed while removing the second release film. The second bonding module is generally a camera module.

[0099] Specifically, in the above assembly method provided by the embodiments of the present disclosure, since full bonding and degassing processes are inevitably required when bonding the fingerprint recognition module in the first window area A, and the degassing process requires a certain temperature and pressure. If the second window area B is a closed space, local thermal expansion and contraction of air will occur, resulting in problems such as the second protective film on the surface may squeeze the corresponding position of the display panel, causing the display panel to break or generating optical stripes. To avoid the second window area B from forming a sealed space during the degassing process, an exhaust passage C is provided between the edge of the second window area B and the heat dissipation film. Through the exhaust passage C, the hot air formed in the second window area B during the degassing process can be effectively released to the outside of the heat dissipation module, which can effectively improve the defects in the second window area B and is beneficial to improving the bonding yield.

[0100] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure also intends to include these changes and modifications.

Claims

1. A heat dissipation module, wherein, Comprising: A heat dissipation film, comprising a mesh adhesive, a foam, and a metal film stacked together; A first release film, located on the side of the mesh adhesive away from the foam; A second release film, located on the side of the metal film away from the foam. The heat dissipation film and the second release film have a first window area and a second window area penetrating in the thickness direction, and an exhaust channel is provided between the second window area and the edge of the heat dissipation film; A first protective film, located on the side of the second release film away from the heat dissipation film and covering the first window area; A second protective film, located on the side of the second release film away from the heat dissipation film and covering the second window area and the exhaust channel. The first protective film and the second protective film are independently provided; Wherein, the exhaust channel is a groove between the second window area and the edge of the heat dissipation film, or the exhaust channel is a channel formed on one side of the side edge of the heat dissipation film leading to the second window area.

2. The heat dissipation module according to claim 1, wherein, The exhaust channel is located between the second window area and the edge of the heat dissipation film closest thereto, and the orthographic projection of the exhaust channel on the heat dissipation film is a straight line.

3. The heat dissipation module according to claim 1, wherein, The exhaust channel penetrates the second release film.

4. The heat dissipation module according to claim 3, wherein, The exhaust channel penetrates the metal film of the heat dissipation film.

5. The heat dissipation module according to claim 4, wherein, The exhaust channel penetrates the heat dissipation film.

6. The heat dissipation module according to claim 1, wherein, The width of the exhaust channel perpendicular to the extending direction is less than 2 mm and greater than 0 mm.

7. A display device, wherein, Comprising: A display panel, comprising a first light-transmitting area and a second light-transmitting area provided in the display area; A heat dissipation film, comprising a mesh adhesive, a foam, and a metal film stacked in sequence on the back of the display panel, and having a first window area penetrating in the thickness direction in the first light-transmitting area, a second window area penetrating in the thickness direction in the second light-transmitting area, and an exhaust channel between the second window area and the edge of the heat dissipation film; A first bonding module, located on the back of the display panel and fixed to the first light-transmitting area through the first window area; A second bonding module, located on the back of the display panel and fixed to the second light-transmitting area through the second window area; Wherein, the exhaust channel is a groove between the second window area and the edge of the heat dissipation film, or the exhaust channel is a channel formed on one side of the side edge of the heat dissipation film leading to the second window area.

8. The display device according to claim 7, wherein, The exhaust channel is located between the second window area and the edge of the heat dissipation film closest thereto.

9. The display device according to claim 7, wherein, The exhaust channel penetrates the metal film of the heat dissipation film.

10. The display device according to claim 9, wherein, The exhaust channel penetrates the heat dissipation film.

11. The display device according to claim 7, wherein, The width of the exhaust channel perpendicular to the extending direction is less than 2 mm and greater than 0 mm.

12. The display device according to claim 7, wherein, The first bonding module is a fingerprint recognition module, and the second bonding module is a camera module.

13. The display device according to claim 7, wherein, The display panel is an OLED display panel.

14. An assembling method of a display device, wherein, Comprising: Providing a display panel, which has a first light-transmitting area and a second light-transmitting area in the display area; Providing a heat dissipation module as described in any one of claims 1-6; After removing the first release film of the heat dissipation module, bonding the mesh adhesive of the heat dissipation film to the back of the display panel; After removing the first protective film of the heat dissipation module, fixing a first bonding module in the first window area; After fixing the first bonding module, perform a degassing process, and discharge the gas pressure generated in the second window area by the degassing process through the exhaust passage; After removing the second release film and the second protective film of the heat dissipation module, fix the second bonding module in the second window area.

15. The assembly method according to claim 14, wherein, The first bonding module is a fingerprint recognition module, and the second bonding module is a camera module.

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