Folding display module and display device

Abstract

The invention discloses a foldable display module and a display device. The foldable display module comprises a flexible display panel and a flexible circuit board. The flexible display panel comprises a display area, a bending area and a binding area which are sequentially connected in the first direction, and the binding area is bent to the side, away from the light emitting face of the flexible display panel, of the display area through the bending area. The display area comprises a first display area, a foldable area and a second display area which are sequentially connected in the first direction. The flexible circuit board is connected with the binding area and located on the side, away from the light-emitting face of the flexible display panel, of the display area. The orthographic projection of the flexible circuit board on the display area is located in the display area, and the orthographic projection area of the flexible circuit board on the display area is 60% or above of the area of the display area. The flexible circuit board is provided with a device area, and the device area is located on the side, away from the flexible display panel, of the flexible circuit board and located in the area close to the edge of the flexible circuit board.

Description

Technical Field

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

[0002] As foldable display products become thinner and lighter, the space in the battery compartment becomes smaller and smaller, and the battery life cannot meet the needs of users.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The present disclosure aims to at least to some extent solve the technical problem of insufficient battery space in foldable display products. To this end, the present disclosure provides a foldable display module and a display device.

[0005] A foldable display module is provided in an embodiment of the present disclosure, and the foldable display module includes: a flexible display panel, the flexible display panel includes a display area, a bending area and a binding area connected in sequence in a first direction, the binding area is bent through the bending area to the side of the display area away from the light-emitting surface of the flexible display panel; the display area includes a first display area, a foldable area and a second display area connected in sequence in the first direction; and a flexible circuit board, the flexible circuit board is connected to the binding area and is located on the side of the display area away from the light-emitting surface of the flexible display panel, the orthographic projection of the flexible circuit board on the display area is located in the display area, and the orthographic projection area of ​​the flexible circuit board on the display area is more than 60% of the area of ​​the display area; a device area is provided on the flexible circuit board, and the device area is located on the side of the flexible circuit board away from the flexible display panel and in an area close to the edge of the flexible circuit board.

[0006] In some embodiments, a copper foil layer is provided in a region of the flexible circuit board corresponding to the foldable region, and / or the copper foil layer is in a grid shape or in a strip shape extending along the first direction.

[0007] In some embodiments, the flexible circuit board is provided with a routing copper layer, and the routing copper layer and the copper foil layer are layered.

[0008] In some embodiments, a hollow area is provided in a region of the flexible circuit board corresponding to the foldable area.

[0009] In some embodiments, the display area is provided with a functional hole area, and an avoidance hole is provided in an area of ​​the flexible circuit board corresponding to the position of the functional hole area.

[0010] In some embodiments, regions of the flexible circuit board corresponding to the first display area and the second display area are respectively provided with reinforcement layers.

[0011] In some embodiments, the device area is located in an area on the flexible circuit board close to an edge relatively set in a second direction and / or is located in an area on the flexible circuit board close to an edge away from the binding area in the first direction, and the second direction is perpendicular to the first direction and the second direction is perpendicular to the display area.

[0012] In some embodiments, the foldable display module also includes a support plate, which is arranged on a side of the display area away from the light-emitting surface of the flexible display panel and is located between the flexible circuit board and the display area; the support plate includes a first support area, a foldable support area and a second support area connected in sequence in a first direction, and the foldable support area is provided with a groove and / or a hollow groove extending along the second direction.

[0013] In some embodiments, the support plate further includes a buffer layer, the buffer layer is disposed at the groove and / or the hollow groove, and the buffer layer is connected to both the first support area and the second support area.

[0014] In some embodiments, a first adhesive layer is provided between the flexible circuit board and the first supporting area, and between the flexible circuit board and the second supporting area, respectively.

[0015] A display device provided by an embodiment of the present disclosure includes a battery and the above-mentioned foldable display module, wherein the battery is located on a side of the flexible circuit board and the binding area away from the display area, and the orthographic projection of the battery on the flexible circuit board does not overlap with the orthographic projection of the device area on the flexible circuit board.

[0016] The embodiments of the present disclosure have at least the following beneficial effects:

[0017] The foldable display module disclosed in this article enables the flexible circuit board to overlap with the flexible display panel to a large extent by making the orthographic projection of the flexible circuit board on the display area located within the display area and making the orthographic projection area of ​​the flexible circuit board on the display area more than 60% of the area of ​​the display area, thereby ensuring that the flexible circuit board has a relatively large area for setting the wiring area, so that the flexible circuit board can have sufficient wiring space by using a flexible circuit board with fewer layers, so as to reduce the space occupied by the flexible circuit board in the thickness direction of the foldable display module, and thus a larger installation space can be reserved for the battery in the thickness direction of the foldable display module; at the same time, the device area is located on the side of the flexible circuit board away from the flexible display panel and in the area close to the edge of the flexible circuit board, and a larger area can be reserved on the side of the flexible circuit board away from the flexible display panel for installing a larger-sized battery, so as to avoid interference between the electronic components arranged in the device area and the battery. On the one hand, the foldable display module can increase the battery size and battery life by increasing the battery installation space. On the other hand, it can use a flexible circuit board with fewer layers to reduce the cost of the flexible circuit board and the foldable display module. At the same time, since the flexible circuit board and the display area have a large overlapping area, the flexible circuit board can also be used to provide certain support for the flexible display panel, thereby improving the overall mechanical strength of the display module to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A top view of a foldable display module according to some embodiments of the present disclosure is shown;

[0020] Figure 2 Shows Figure 1 A cross-sectional view of a foldable display module;

[0021] Figure 3 Shows Figure 1 A top view of a flexible circuit board of a foldable display module;

[0022] Figure 4 A top view of a flexible circuit board of a foldable display module according to other embodiments of the present disclosure is shown;

[0023] Figure 5 A cross-sectional view of a foldable display device according to some embodiments of the present disclosure is shown;

[0024] Figure 6 Cross-sectional views of foldable display devices according to other embodiments of the present disclosure are shown.

[0025] Reference numerals:

[0026] 100, flexible display panel; 110, display area; 111, first display area; 112, foldable area; 113, second display area; 120, bending area; 121, protective adhesive layer; 130, binding area; 200, flexible circuit board; 210, routing area; 220, device area; 230, copper foil layer; 240, hollow area; 300, support plate; 310, first support area; 320, foldable support area; 330, second support area; 340, buffer layer; 400, first adhesive layer; 500, back film; 600, second adhesive layer; 700, bending tape; 800, battery; 900, middle frame; F1, first direction; F2, second direction. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0028] In addition, the present disclosure may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present disclosure provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.

[0029] The present disclosure is described below with reference to specific embodiments and in conjunction with the accompanying drawings:

[0030] As foldable display products become thinner and lighter, the battery compartment space becomes smaller and smaller, and the battery life cannot meet the needs of users. In order to increase the space of the battery compartment, R&D engineers have made great efforts and various solutions have emerged.

[0031] In the related art, since the routing of the flexible printed circuit (FPC) in the folding display product is relatively complicated and the installation space of the flexible printed circuit is limited, a flexible printed circuit board with a multi-layer board structure is required to reduce the space occupied by the flexible printed circuit board. However, the price of the flexible printed circuit board with a multi-layer board structure is expensive, which not only leads to a high cost of the folding display product, but also reduces the overall mechanical strength of the folding display product due to the small overlap area between the flexible printed circuit board with the multi-layer board structure and the flexible display panel.

[0032] According to some embodiments of the present disclosure, the foldable display module, such as Figures 1 to 6 As shown, the foldable display module includes a flexible display panel 100 and a flexible circuit board 200, the flexible display panel 100 includes a display area 110, a bending area 120 and a binding area 130 connected in sequence in a first direction F1, the binding area 130 is bent through the bending area 120 to the side of the display area 110 away from the light emitting surface of the flexible display panel 100; the display area 110 includes a first display area 111, a foldable area 112 and a second display area 113 connected in sequence in the first direction F1; the flexible circuit board 200 00 is connected to the binding area 130 and is located on the side of the display area 110 away from the light emitting surface of the flexible display panel 100, the orthographic projection of the flexible circuit board 200 on the display area 110 is located in the display area 110 and the orthographic projection area of ​​the flexible circuit board 200 on the display area 110 is more than 60% of the area of ​​the display area 110; a device area 220 is provided on the flexible circuit board 200, and the device area 220 is located on the side of the flexible circuit board 200 away from the flexible display panel 100 and in an area close to the edge of the flexible circuit board 200.

[0033] Based on the same inventive concept, the embodiment of the present disclosure also provides a display device, such as Figure 5 and Figure 6 As shown, the display device includes a battery 800 and the above-mentioned foldable display module, the battery 800 is located on the side of the flexible circuit board 200 and the binding area 130 away from the display area, and the orthographic projection of the battery 800 on the flexible circuit board 200 does not overlap with the orthographic projection of the device area 220 on the flexible circuit board 200. Since the display device of the present disclosure includes the foldable display module of the above-mentioned technical solution, the display device provided by the present disclosure has all the beneficial effects of the above-mentioned foldable display device, which will not be repeated in the following description of the present disclosure.

[0034] The foldable display module and display device disclosed in this article are as follows: Figures 1 to 6As shown, by making the orthographic projection of the flexible circuit board 200 on the display area 110 located within the display area 110 and making the orthographic projection area of ​​the flexible circuit board 200 on the display area 110 more than 60% of the area of ​​the display area 110, the flexible circuit board 200 can overlap with the flexible display panel 100 to a large extent, thereby ensuring that the flexible circuit board 200 has a relatively large area for setting the wiring area, so that the flexible circuit board 200 with fewer layers can have sufficient wiring space for the flexible circuit board 200, so as to reduce the space occupied by the flexible circuit board 200 in the thickness direction of the foldable display module, and thus a larger installation space can be reserved for the battery 800 in the thickness direction of the foldable display module; at the same time, the device area 220 is located on the side of the flexible circuit board 200 away from the flexible display panel 100 and in the area close to the edge of the flexible circuit board 200, and a larger area can be reserved on the side of the flexible circuit board 200 away from the flexible display panel 100 for installing a larger battery 800, so as to avoid interference between the electronic components arranged in the device area 220 and the battery 800. On the one hand, the foldable display module of the embodiment of the present disclosure can increase the size and battery life of the battery 800 by increasing the installation space of the battery 800. On the other hand, the foldable display module of the embodiment of the present disclosure can adopt a flexible circuit board 200 with fewer layers to reduce the cost of the flexible circuit board 200 and the foldable display module. At the same time, since the flexible circuit board 200 and the display area 110 have a large overlapping area, the flexible circuit board 200 can also be used to provide certain support to the flexible display panel 100, thereby improving the overall mechanical strength of the display module to a certain extent.

[0035] In some embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the flexible circuit board 200 used in the foldable display module can be a single-layer flexible circuit board 200 or a two-layer flexible circuit board 200. Compared with the multi-layer flexible circuit board 200, the single-layer flexible circuit board 200 or the two-layer flexible circuit board 200 is thinner and occupies less space in the thickness direction of the foldable display module, which can effectively increase the installation space of the battery 800 in the thickness direction of the foldable display module; at the same time, compared with the multi-layer flexible circuit board 200, the cost of the single-layer flexible circuit board 200 or the two-layer flexible circuit board 200 can be reduced by more than 80%, thereby making the cost of the foldable display module lower and more competitive.

[0036] In some embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the flexible display panel 100 in the foldable display module can be a flexible organic electroluminescence display (OLED) panel.

[0037] In some embodiments of the present disclosure, Figure 1 and Figure 2 As shown, the ratio of the orthographic projection area of ​​the flexible circuit board 200 on the display area 110 to the area of ​​the display area 110 is as large as possible, so as to increase the area of ​​the flexible circuit board 200 as much as possible, and ensure that the flexible circuit board 200 has sufficient wiring area 210, so that the flexible circuit board can have fewer layers to meet the wiring space, thereby reducing the cost of the flexible circuit board, and increasing the installation space of the battery, so that the display device using the foldable TV module can be configured with a larger battery and have a longer battery life. Optionally, the orthographic projection area of ​​the flexible circuit board 200 on the display area 110 can be 60%, 62%, 65%, 68%, 70%, 73%, 75%, 77%, 80%, 83%, 85%, 87%, 90%, 93%, 95%, 96%, 97%, 98%, 99%, etc. of the area of ​​the display area 110.

[0038] In some embodiments of the present disclosure, Figure 1 and Figure 2 As shown, when the orthographic projection area of ​​the flexible circuit board 200 on the display area 110 is more than 60% of the area of ​​the display area 110, if the routing area 210 of the flexible circuit board 200 still cannot meet the routing design, the flexible circuit board 200 can also adopt a flexible circuit board 200 structure with three or more layers.

[0039] In some embodiments of the present disclosure, Figure 5 and Figure 6 As shown, a protective adhesive layer 121 may be provided in the bending area 120 of the flexible display module to protect the bending area 120 through the protective adhesive layer 121, thereby improving the mechanical strength of the bending area 120 and reducing the risk of collision damage to the bending area 120 to a certain extent.

[0040] As an optional implementation, Figures 1 to 4 As shown, a copper foil layer 230 is provided in an area of ​​the flexible circuit board 200 corresponding to the foldable area 112 , and / or the copper foil layer 230 is in a grid shape or in a strip shape extending along a first direction.

[0041] In some embodiments of the present disclosure, Figures 1 to 4As shown, when the foldable display module is folded, the flexible display panel 100 is bent and folded in the foldable area 112, and the flexible circuit board 200 is synchronously bent and folded in the area corresponding to the foldable area 112. By providing a copper foil layer 230 in the area corresponding to the foldable area 112 of the flexible circuit board 200, the structural strength of the area corresponding to the foldable area 112 of the flexible circuit board 200 can be improved, and the bending performance of the area corresponding to the foldable area 112 of the flexible circuit board 200 can be improved.

[0042] In some embodiments of the present disclosure, Figures 1 to 4 As shown, by arranging the copper foil layer 230 into a grid shape or a strip shape extending along the first direction F1, while the structural strength of the area corresponding to the flexible circuit board 200 and the foldable area 112 is enhanced by the copper foil layer 230, the stiffness of the copper foil layer 230 can be reduced, thereby avoiding to a certain extent the increase in the stiffness of the area corresponding to the flexible circuit board 200 and the foldable area 112 due to the presence of the copper foil layer 230, and further avoiding to a certain extent the influence of the presence of the copper foil layer 230 on the bending performance of the area corresponding to the flexible circuit board 200 and the foldable area 112.

[0043] As an optional implementation, Figures 1 to 4 As shown, a hollow area 240 is provided in the area of ​​the flexible circuit board 200 corresponding to the foldable area 112 .

[0044] In some embodiments of the present disclosure, Figures 1 to 4 As shown, by providing a hollow area 240 in the area of ​​the flexible circuit board 200 corresponding to the foldable area 112, the rigidity of the area of ​​the flexible circuit board 200 corresponding to the foldable area 112 can be reduced, and the bendability of the area of ​​the flexible circuit board 200 corresponding to the foldable area 112 can be improved. Optionally, the hollow area 240 can also be patterned, for example, the hollow area can be rectangular, diamond, circular, elliptical, etc.

[0045] As an optional implementation, the display area 110 is provided with a functional hole area, and an avoidance hole is provided in an area of ​​the flexible circuit board 200 corresponding to the position of the functional hole area.

[0046] In some embodiments of the present disclosure, the display device may be provided with functional structures such as a breathing light, an ambient light sensor (ALS), an infrared radiation (IR), and a time-of-flight (TOF) sensor. Accordingly, in the flexible display panel 100 of the foldable display module, the display area 110 corresponding to these functional structures needs to be provided with a functional hole area to meet the installation of these functional structures. At the same time, since these functional structures are located on the side of the display area 110 away from the light-emitting surface of the flexible display panel 100, in order to avoid interference between the flexible circuit board 200 and these functional structures, avoidance holes may be provided in the area of ​​the flexible circuit board 200 corresponding to the position of the functional hole area, so as to avoid the above-mentioned functional structures through the avoidance holes.

[0047] As an optional implementation, the regions of the flexible circuit board 200 corresponding to the first display area 111 and the second display area 113 are respectively provided with reinforcement layers.

[0048] In some embodiments of the present disclosure, the flexible circuit board 200 has the advantage of being light and thin, but also has the weakness of low mechanical strength. In order to improve the mechanical strength of the flexible circuit board 200, a reinforcement layer may be provided in the areas of the flexible circuit board 200 corresponding to the first display area 111 and the second display area 113, respectively, so as to improve the mechanical strength of the flexible circuit board 200 through the reinforcement layer. Optionally, the reinforcement layer may be located on the side of the flexible circuit board 200 close to the display area, the reinforcement layer may also be located on the side of the flexible circuit board 200 away from the display area, and the reinforcement layer may also be provided on the side of the flexible circuit board 200 close to the display area and the side away from the display area. It should be noted that the reinforcement layer needs to avoid the functional interface or electronic components and other structures on the flexible circuit board 200.

[0049] In some embodiments of the present disclosure, the reinforcement layer may be reinforced with a heat-resistant resin material or a metal material to improve the mechanical strength of the flexible circuit board 200. For example, the reinforcement layer may be made of a polyimide film, a steel sheet, an aluminum sheet, a copper sheet, a stainless steel sheet, a pressure sensitive adhesive (PSA), or the like.

[0050] In some embodiments of the present disclosure, optionally, an electromagnetic shielding film may be further provided on the flexible circuit board 200 to improve the anti-electromagnetic interference capability of the flexible circuit board 200 through the conductive shielding film.

[0051] In some embodiments of the present disclosure, optionally, a conductive adhesive film may be provided on the flexible circuit board 200 to be connected to a ground point (Ground, GND) in the display device through the conductive adhesive film, such as a ground point provided on the middle frame, thereby achieving a grounding effect through the connection between the conductive adhesive film and the ground point.

[0052] As an optional implementation, Figures 1 to 4 As shown, the device area 220 is located in an area on the flexible circuit board 200 close to the relatively set edges in the second direction F2 and / or in an area on the flexible circuit board 200 close to the edge away from the binding area 130 in the first direction F1, and the second direction F2 is perpendicular to the first direction F1 and perpendicular to the display area.

[0053] In some embodiments of the present disclosure, Figures 1 to 4 As shown, the flexible circuit board 200 has edges relatively set in the second direction F2 and edges away from the binding area 130 in the first direction F1, and these edges are also closer to the edge of the display area. By making the device area 220 located in the area of ​​the flexible circuit board 200 close to the relatively set edges in the second direction F2 and / or located in the edge area of ​​the flexible circuit board 200 close to the edge area away from the binding area 130 in the first direction F1, that is, making the device area 220 as close to the edge of the flexible circuit board 200 as possible, a larger space can be reserved in the middle area of ​​the flexible circuit board 200, that is, a larger installation space is reserved for the installation of the battery 800, thereby increasing the size and battery life of the battery 800 in the display device.

[0054] In some embodiments of the present disclosure, Figures 1 to 4 As shown, the device area 220 can be adjusted according to the position of the whole machine space on the flexible circuit board 200 to release as much space as possible on the side of the flexible circuit board 200 away from the light emitting surface of the flexible display panel 100, thereby improving space utilization.

[0055] As an optional implementation, Figures 1 to 6 As shown, the foldable display module also includes a support plate 300, which is arranged on a side of the display area 110 away from the light-emitting surface of the flexible display panel 100 and is located between the flexible circuit board 200 and the display area 110; the support plate 300 includes a first support area 310, a foldable support area 320 and a second support area 330 connected in sequence in a first direction F1, and the foldable support area 320 is provided with a groove and / or a hollow groove extending along the second direction F2.

[0056] In some embodiments of the present disclosure, Figure 1 and Figure 2 , Figure 5 and Figure 6As shown, the support plate 300 is supported on the non-light-emitting surface of the flexible display panel 100 to support the flexible display panel 100 to realize the folding and unfolding operation. Among them, the position of the first support area 310 corresponds to the first display area 111, and is used to support the first display area 111; the position of the second support area 330 corresponds to the second display area 113, and is used to support the second display area 113; the position of the foldable support area 320 corresponds to the foldable area 112, so as to support the foldable area 112 to perform the folding and unfolding action. By providing the foldable support area 320 with a groove and / or a hollow groove extending along the second direction F2, the rigidity of the foldable support area 320 can be reduced, the foldability of the foldable support area 320 can be improved, and the supporting performance of the foldable support area 320 for the foldable area 112 can also be retained. As shown Figure 5 As shown, optionally, the foldable support area 320 may be provided with one or more hollow grooves extending along the second direction F2, and the hollow grooves may be used to reduce the rigidity of the foldable support area 320 and improve the flexibility of the foldable support area 320 to facilitate bending. Figure 6 As shown, optionally, the foldable support area 320 may be provided with one or more grooves extending along the second direction F2, and the hollow grooves may be used to reduce the rigidity of the foldable support area 320 and improve the flexibility of the foldable support area 320 to facilitate bending thereof.

[0057] In some embodiments of the present disclosure, optionally, Figure 2 , Figure 5 and Figure 6 As shown, the cross section of the groove can be circular, oval, square or diamond. Optionally, the opening direction of the groove faces the bending direction of the foldable display module, so that the foldable support area 320 is easier to bend and is not easily deformed before and after bending.

[0058] In some embodiments of the present disclosure, optionally, the support plate 300 is conductive and can be used to release static electricity to prevent static electricity accumulation from causing damage to the flexible display panel 100 and display defects.

[0059] In some embodiments of the present disclosure, optionally, the support plate 300 can be made of metal materials, alloy materials, carbon fiber and other materials. For example, the support plate 300 can be made of steel, aluminum, aluminum alloy, stainless steel, carbon fiber and other materials.

[0060] In some embodiments of the present disclosure, when the foldable display module is provided with a support plate 300, when the binding area 130 is bent to the side of the display area 110 away from the light emitting surface of the flexible display panel 100 through the bending area 120, the binding area 130 is located on the side of the support plate 300 away from the light emitting surface of the flexible display panel 100. Optionally, a bending tape 700 may be provided between the binding area 130 and the support plate 300, so that the binding area 130 is fixed to the support plate 300 through the bending tape 700.

[0061] As an optional implementation, Figure 2 , Figure 5 as well as Figure 6 As shown, the support plate 300 further includes a buffer layer 340 , which is disposed at the groove and / or the hollow groove, and the buffer layer 340 is connected to both the first support area 310 and the second support area 330 .

[0062] In some embodiments of the present disclosure, Figure 2 , Figure 5 as well as Figure 6 As shown, by arranging a buffer layer 340 at the groove and / or hollow groove, and filling the buffer layer 340 in the groove or hollow groove, the support plate 300 has better bendability and foldability in the foldable support area 320, and also has better support performance.

[0063] In some embodiments of the present disclosure, the buffer layer 340 may be made of thermoplastic polyurethane (TPU). Thermoplastic polyurethane has high impact resistance and can provide buffering force and support during the repeated bending of the foldable support area 320, thereby protecting the structural stability of the foldable support area 320.

[0064] In some embodiments of the present disclosure, Figure 1 and Figure 2 , Figure 5 and Figure 6 As shown, the orthographic projection of the flexible circuit board 200 on the display area 110 matches the outer contour of the orthographic projection of the support plate 300 on the display area 110, that is, the flexible circuit board 200 can be attached to the support plate 300 on its entire surface, so that the wiring area 210 of the flexible circuit board 200 can be expanded as much as possible. At the same time, since the flexible circuit board 200 can be attached to the support plate 300 on its entire surface, the laminated structure of the flexible circuit board 200 itself can play the same supporting role as the support plate 300, so the flexible circuit board 200 can replace a certain supporting structure layer in the support plate 300, for example, the flexible circuit board 200 can replace the metal layer or stainless steel layer in the support plate 300.

[0065] As an optional implementation, Figure 2 , Figure 5 as well as Figure 6 As shown, a first adhesive layer 400 is disposed between the flexible circuit board 200 and the first supporting area 310 , and between the flexible circuit board 200 and the second supporting area 330 .

[0066] In some embodiments of the present disclosure, Figure 2 , Figure 5 as well as Figure 6 As shown, a first adhesive layer 400 is provided between the flexible circuit board 200 and the first support area 310, and a first adhesive layer 400 is provided between the flexible circuit board 200 and the second support area 330, so that the flexible circuit board 200 is fixed to the side of the support plate 300 away from the light-emitting surface of the flexible display panel 100 through the first adhesive layer 400. At the same time, the area of ​​the flexible circuit board 200 corresponding to the foldable area 112 and the foldable support area 320 may not be bonded to ensure the bendable and foldable performance of the flexible circuit board 200.

[0067] In some embodiments of the present disclosure, Figure 2 , Figure 5 as well as Figure 6 As shown, a back film 500 may be provided on the side of the flexible display panel 100 opposite to the light emitting surface, and the back film 500 enhances the stability of the flexible display panel 100 and reduces the risk of uneven force on the flexible display panel 100.

[0068] In some embodiments of the present disclosure, Figure 5 and Figure 6 As shown, a second adhesive layer 600 is provided between the support plate 300 and the back film 500 , so that the support plate 300 is fixed to the side of the display area away from the light emitting surface of the flexible display panel 100 through the second adhesive layer 600 .

[0069] In some embodiments of the present disclosure, Figure 5 and Figure 6 As shown, in the display device, by locating the battery 800 on the side of the flexible circuit board 200 and the binding area 130 away from the display area, and making the battery 800 not overlap with the device area 220, the installation space of the battery 800 can be greatly increased, and the thickness of the display device can be ensured to be thin.

[0070] In some embodiments of the present disclosure, Figure 6 As shown, in the display device, other components may be provided at the installation position of the battery 800 according to design requirements.

[0071] In some embodiments of the present disclosure, Figure 6 As shown, the display device further includes a middle frame 900 , and the middle frame 900 is located on a side of the battery 800 away from the flexible circuit board 200 .

[0072] In the present disclosure, unless otherwise expressly specified and limited, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being “above”, “above”, and “above” a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0073] In addition, in the present disclosure, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present disclosure, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] Although embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A foldable display module, characterized in that: The foldable display module comprises: A flexible display panel, the flexible display panel comprising a display area, a bending area and a binding area connected in sequence in a first direction, the binding area being bent through the bending area to a side of the display area away from a light emitting surface of the flexible display panel; the display area comprising a first display area, a foldable area and a second display area connected in sequence in the first direction; and, A flexible circuit board, wherein the flexible circuit board is connected to the binding area and is located on a side of the display area away from the light emitting surface of the flexible display panel, the orthographic projection of the flexible circuit board on the display area is located within the display area, and the orthographic projection area of ​​the flexible circuit board on the display area is more than 60% of the area of ​​the display area; a device area is provided on the flexible circuit board, and the device area is located on a side of the flexible circuit board away from the flexible display panel and in an area close to an edge of the flexible circuit board.

2. The foldable display module according to claim 1, wherein: A copper foil layer is provided in an area of ​​the flexible circuit board corresponding to the foldable area, and / or the copper foil layer is in a grid shape or in a strip shape extending along the first direction.

3. The foldable display module according to claim 2, wherein: The flexible circuit board is provided with a wiring copper layer, and the wiring copper layer and the copper foil layer are arranged in layers.

4. The foldable display module according to claim 1, wherein: A hollow area is provided in the area of ​​the flexible circuit board corresponding to the foldable area.

5. The foldable display module according to claim 1, wherein: The display area is provided with a functional hole area, and an avoidance hole is provided in an area of ​​the flexible circuit board corresponding to the position of the functional hole area.

6. The foldable display module according to claim 1, wherein: The flexible circuit board is provided with reinforcement layers in areas corresponding to the first display area and the second display area.

7. The foldable display module according to any one of claims 1 to 6, characterized in that: The device area is located in an area on the flexible circuit board close to an edge relatively set in a second direction and / or in an area on the flexible circuit board close to an edge far away from the binding area in the first direction, and the second direction is perpendicular to the first direction and the second direction is perpendicular to the display area.

8. The foldable display module according to claim 7, wherein: The foldable display module further includes: A support plate, wherein the support plate is arranged on a side of the display area away from the light-emitting surface of the flexible display panel and is located between the flexible circuit board and the display area; the support plate includes a first support area, a foldable support area and a second support area connected in sequence in a first direction, and the foldable support area is provided with a groove and / or a hollow groove extending along the second direction.

9. The foldable display module according to claim 8, wherein: The support plate further includes a buffer layer, which is disposed at the groove and / or the hollow groove, and the buffer layer is connected to both the first support area and the second support area.

10. The foldable display module according to claim 8, wherein: A first adhesive layer is provided between the flexible circuit board and the first supporting area, and between the flexible circuit board and the second supporting area.

11. A display device, characterized in that: The display device includes a battery and a foldable display module as described in any one of claims 1 to 10, wherein the battery is located on a side of the flexible circuit board and the binding area away from the display area, and the orthographic projection of the battery on the flexible circuit board does not overlap with the orthographic projection of the device area on the flexible circuit board.

Images