Display module and display device

Abstract

The invention discloses a display module and a display device. The display module comprises a first body, a bending part and a second body which are sequentially connected, the bending part comprises a first bending section, a second bending section and a third bending section which are sequentially connected, the curvature of the first bending section is larger than that of the second bending section, and the curvature of the third bending section is larger than that of the second bending section. The first bent section and the third bent section are arc sections; the first bending section and the third bending section are arranged to be the arc sections, the bending stress of the first bending section at the bending starting section and the bending stress of the third bending section at the bending stopping section are reduced, the technical problem that the bending part is broken is avoided, meanwhile, the curvature of the first bending section and the curvature of the third bending section are both larger than the curvature of the second bending section, and the bending strength of the bending part is improved. The occupied width of the second bent section on the frame is reduced, and the narrow frame design of the product is achieved.

Description

Technical Field

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

[0002] As electronic devices pursue the development trend of the ultimate full screen, display screens (such as mobile phones) are emerging in the market in an endless stream. In order to pursue the diversification of the appearance of display devices, the narrow bezel design of the display screen is particularly important.

[0003] In current narrow-border display screens, the binding end of the display panel can be bent to the side of the display panel away from the light-emitting surface, or the flexible circuit board bound to the binding end of the display panel can be bent to the side of the display panel away from the light-emitting surface, thereby reducing the lower border of the display panel to achieve a narrow-border design of the product; and existing display panels or flexible circuit boards usually set the bending section to an ellipse to reduce the lower border of the product, but the curvature radius of the elliptical bending section at the starting point and the end point of the bending is large, which increases the bending stress at this position and causes the risk of product breakage. Summary of the invention

[0004] The present application provides a display module and a display device thereof to solve the technical problem that the bending stress of the curved section of the existing narrow-frame display module is relatively large at the starting point and the ending point.

[0005] To solve the above-mentioned problems, the technical solutions provided by this application are as follows:

[0006] In a first aspect, the present application provides a display module, comprising a first body and a second body connected to each other, and a curved portion connecting the first body and the second body; wherein the curved portion comprises:

[0007] A first curved section connected to the first body;

[0008] a second curved section connected to an end of the first curved section away from the first body;

[0009] a third curved section connected between the second curved section and the second body;

[0010] The curvature of the first curved segment is greater than that of the second curved segment, the curvature of the third curved segment is greater than that of the second curved segment, and the first curved segment and the third curved segment are arc segments.

[0011] Optionally, the Young's modulus of the first bending segment is smaller than that of the second bending segment, and the Young's modulus of the third bending segment is smaller than that of the second bending segment.

[0012] Optionally, the Young's modulus of the first bending segment is less than or equal to the Young's modulus of the third bending segment.

[0013] Optionally, the bending portion includes a base substrate and a conductor layer provided on the base substrate;

[0014] The Young's modulus of the substrate in the first curved section is smaller than that in the second curved section, and the Young's modulus of the substrate in the third curved section is smaller than that in the second curved section.

[0015] Or / and, the Young's modulus of the conductor layer in the first curved segment is smaller than the Young's modulus of the conductor layer in the second curved segment, and the Young's modulus of the conductor layer in the third curved segment is smaller than the Young's modulus of the conductor layer in the second curved segment.

[0016] Optionally, a first groove is formed on the substrate in the first curved section, and a second groove is formed on the substrate in the third curved section, and the first groove and the second groove face the wire layer.

[0017] Optionally, the first groove and the second groove have the same depth, and an opening area of ​​the first groove away from the wire layer is greater than or equal to an opening area of ​​the second groove away from the wire layer;

[0018] Alternatively, the opening areas of the first groove and the second groove away from the conductive line layer are equal, and the depth of the first groove is greater than or equal to the depth of the second groove.

[0019] Optionally, the conductor layer includes multiple transmission lines, the area of ​​the transmission lines per unit area in the first curved segment is smaller than the area of ​​the transmission lines per unit area in the second curved segment, and the area of ​​the transmission lines per unit area in the third curved segment is smaller than the area of ​​the transmission lines per unit area in the second curved segment.

[0020] Optionally, the display module also includes a composite functional layer arranged between the first body and the second body, a fixing part is provided on a surface of the composite functional layer close to the curved section, and a surface of the fixing part away from the composite functional layer is connected to the second curved section.

[0021] Optionally, a surface area of ​​the fixing member on a side away from the composite functional layer is smaller than or equal to an area of ​​the second curved section.

[0022] Optionally, in a side view of the display module, the curvature of the second curved section is 0.

[0023] Optionally, in a side view of the display module, a ratio of the length of the second curved segment to the length of the curved portion is 0.1 to 0.9.

[0024] In a second aspect, the present application also proposes a display device, which includes the above-mentioned display module.

[0025] Beneficial effect: The present application reduces the bending stress of the first bending segment at the bending starting segment and the bending ending segment of the third bending segment by setting the first bending segment and the third bending segment as arc segments, thereby avoiding the technical problem of breakage in the bending portion. At the same time, the curvatures of the first bending segment and the third bending segment are both greater than the curvature of the second bending segment, thereby reducing the width occupied by the second bending segment at the frame, thereby realizing a narrow frame design of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0027] Figure 1 This is a first structural diagram of the display module for this application;

[0028] Figure 2 This is a second structural diagram of the display module for this application;

[0029] Figure 3 This is the third structural diagram of the display module of this application;

[0030] Figure 4 This is a film layer structure diagram of the display panel in the display module of this application;

[0031] Figure 5 This is the fourth structural diagram of the display module of this application;

[0032] Figure 6 This is a diagram showing the film structure of the curved portion of the display panel of this application;

[0033] Figure 7 This is a first structural diagram of a transmission line of a curved portion in a display module of the present application;

[0034] Figure 8 A second structural diagram of a transmission line of a curved portion in a display module of the present application;

[0035] Fig. 9 A third structural diagram of a transmission line of a curved portion in a display module of the present application;

[0036] Fig.10 This is the fifth structural diagram of the display module of this application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0038] See also Figures 1 to 10 The present application provides a display module 100, which includes a first body 110, a second body 120 connected to each other, and a bending portion 130 connecting the first body 110 and the second body 120, and the bending portion 130 includes a first bending segment 131, a second bending segment 132 and a third bending segment 133.

[0039] In this embodiment, the first curved segment 131 is connected to the first body 110 , the second curved segment 132 is connected to an end of the first curved segment 131 away from the first body 110 , and the third curved segment 133 is connected between the second curved segment 132 and the second body 120 .

[0040] In this embodiment, the curvature of the first curved segment 131 is greater than that of the second curved segment 132 , the curvature of the third curved segment 133 is greater than that of the second curved segment 132 , and the first curved segment 131 and the third curved segment 133 are arc segments.

[0041] It should be noted that, for current narrow-border display devices, the bending section of the display panel 10 or the flexible circuit board FPC is usually elliptical, but the curvature radius of the elliptical bending section at the bending starting point and the ending point is large, which increases the bending stress at this position; and the present application reduces the bending stress of the first bending section 131 at the bending starting section and the third bending section 133 at the bending ending section by setting the first bending section 131 and the third bending section 133 as arc sections, thereby avoiding the technical problem of breakage of the bending portion 130. At the same time, in order to reduce the lower border of the product, the curvatures of the first bending section 131 and the third bending section 133 are both greater than the curvature of the second bending section 132, thereby reducing the width occupied by the second bending section 132 at the border, thereby realizing a narrow border design of the product.

[0042] It should be noted that the center angles of the arc segments of the first curved segment 131 and the third curved segment 133 may be 70 degrees to 90 degrees. Figure 5 and attached Fig.10 In the present application, the central angles of the first curved section 131 and the third curved section 133 can both be 90 degrees.

[0043] It should be noted that, since the first curved segment 131 and the third curved segment 133 are arc segments, in order to achieve a narrow frame design of the product, the present application can reduce the curvature of the second curved segment 132. For example, the curvature of the second curved segment 132 of the present application can be close to 0. In the following embodiments, the curvature of the second curved segment 132 is 0. Figure 5 and attached Fig.10 In the side view of the display module 100 , the first curved segment 131 and the third curved segment 133 are arc segments, and the second curved segment 132 is a straight segment.

[0044] It should be noted that when the display module 100 is a flexible display module 100, the first body 110, the second body 120 and the bending portion 130 are all part of the display panel, and the second body 120 can be bent to the side of the first body 110 away from the light emitting surface. For details, please refer to Figure 1 and Figure 2 When the display module 100 is a non-flexible display module 100, the first body 110 may be a display panel 10, the second body 120 and the bending portion 130 may be a flexible circuit board FPC, one end of the flexible circuit board FPC is bound and connected to the display panel 10, and the other end of the flexible circuit board FPC is bent to the side of the first body 110 away from the light emitting surface. For details, please refer to Figure 3 The following embodiments are described by taking the display module 100 as a flexible display module as an example.

[0045] The technical solution of the present application is now described in conjunction with specific embodiments.

[0046] In this embodiment, the first body 110 has a display area and a non-display area adjacent to the display area. For example, the non-display area surrounds the display area so that the display area is surrounded by the non-display area. The display area is an area in the display panel 10 for performing a display function, and a plurality of display units for realizing the display function are arranged therein. The non-display area may be a frame area of ​​the display panel 10, and a functional component may be arranged therein to assist the display unit in the display area to perform display.

[0047] In this embodiment, a binding terminal is provided in the second body 120, and the binding terminal can be connected to an external circuit, and the binding terminal transmits a signal input from the external circuit to a data line, thereby driving the display panel 10 to display a picture. For example, the binding terminal can be bound and connected to a driver chip IC, etc., to provide power and a driving signal, etc., to the display panel 10.

[0048] In this embodiment, a plurality of transmission lines are disposed in the bent portion 130 to implement data transmission between the second body 120 and the first body 110 .

[0049] See also Figure 4 , Figure 4 Schematic diagram of the display panel 10 of the present application. The display panel 10 may include a base substrate 140, a driving circuit layer 150 disposed on the base substrate 140, a pixel definition layer 160 and a light emitting device layer 170 disposed on the driving circuit layer 150, and an encapsulation layer 180 disposed on the pixel definition layer 160.

[0050] In the present embodiment, the base substrate 140 supports various layers disposed on the base substrate 140. When the display panel is a bottom-emitting light-emitting display device or a double-sided light-emitting display device, a transparent base substrate is used. When the display panel is a top-emitting light-emitting display device, a semi-transparent or opaque base substrate as well as a transparent base substrate can be used.

[0051] In the present embodiment, the substrate substrate 140 is made of an insulating material such as glass, quartz or polymer resin. The substrate substrate 140 may be a rigid substrate or a flexible substrate that can be bent, folded, rolled, etc. Examples of flexible materials for the flexible substrate include polyimide (PI), but are not limited to polyimide (PI).

[0052] In this embodiment, the base substrate 140 may include a first flexible substrate 141, a first barrier layer 142, a second flexible substrate 143, and a second barrier layer 144 that are stacked. The first flexible substrate 141 and the second flexible substrate 143 may be formed of the same material such as polyimide, and the first barrier layer 142 and the second barrier layer 144 may be formed of an inorganic material including, for example, at least one of SiOx and SiNx.

[0053] See also Figure 4 The driving circuit layer 150 may include a plurality of thin film transistors, which may be of an etch-stop type, a back-channel etch type, or may be divided into a bottom-gate thin film transistor, a top-gate thin film transistor, and the like according to the position of the gate electrode and the active layer, without any specific limitation. For example, Figure 4 The thin film transistor shown in the figure is a top-gate thin film transistor, which may include a light shielding unit 151 disposed on a substrate, a buffer layer 152 disposed on the light shielding unit 151, an active layer 153 disposed on the buffer layer 152, a gate insulating layer 154 disposed on the active layer 153, a gate layer 155 disposed on the gate insulating layer 154, an inter-insulating layer 156 disposed on the gate layer 155, a source-drain electrode layer 157 disposed on the inter-insulating layer 156, and a planar layer 158 disposed on the source-drain electrode layer 157; Figure 4 The structure of the thin film transistor is only an example of the present application. Other types of thin film transistors are also applicable to the present application. At the same time, the settings of double-layer gate layer and double-layer and above source and drain layers are also applicable to the present application.

[0054] See also Figure 4 The light emitting device layer 170 may further include an anode layer 171 disposed on the planar layer 158, a light emitting layer 172 disposed on the anode layer 171, and a cathode layer 173 disposed on the light emitting layer 172. The anode layer 171 includes a plurality of anodes, the pixel definition layer 160 includes a plurality of pixel openings corresponding to the plurality of anodes, and each pixel opening corresponds to exposing the upper surface of an anode, and the light emitting layer may include a plurality of light emitting pixels corresponding to the plurality of anodes.

[0055] See also Figure 4 The encapsulation layer 180 covers the pixel definition layer 160 and continuously covers multiple pixel openings and multiple light-emitting pixels; wherein the encapsulation layer 180 may include at least a first inorganic encapsulation layer 181, a first organic encapsulation layer 182 and a second inorganic encapsulation layer 183 stacked on the pixel definition layer 160.

[0056] See also Figure 1 The display module 100 further includes a polarizer 40 , a cover layer 50 , and an optical adhesive layer 60 disposed between the polarizer 40 and the cover layer 50 , and the cover layer 50 is bonded to the polarizer 40 through the optical adhesive layer 60 .

[0057] In this embodiment, a circle of ink layer 70 may be provided on one side of the cover layer 50 close to the optical adhesive layer 60 . The ink layer 70 may be used to shield the peripheral area of ​​the display module 100 , so the ink layer 70 may define the edge area of ​​the display module 100 .

[0058] See also Figure 1 The display module 100 also includes a composite support layer 20 disposed between the first body 110 and the second body 120. The composite support layer 20 includes a first back plate 21, a second back plate 22, and a functional support layer 23 disposed between the first back plate 21 and the second back plate 22. The first back plate 21 is in contact with the first body 110, and the second back plate 22 is in contact with the second body 120.

[0059] In this embodiment, the material of the first back plate 21 and the second back plate 22 may include polyethylene terephthalate or the like.

[0060] In this embodiment, the functional support layer 23 may include a heat dissipation buffer layer 231 (Super Clean Foam, SCF) and a filling rubber layer 232 (Stiffener, STF), the filling rubber layer 232 is arranged between the second back plate 22 and the heat dissipation buffer layer 231; the heat dissipation buffer layer 231 may include a grid rubber layer, a foam layer and a metal layer stacked in sequence, or a grid rubber layer, a foam layer, a polyimide layer and a metal layer stacked in sequence.

[0061] See also Figure 2 For a folding display device, the functional support layer 23 may include a stacked structure of a buffer layer, a rigid layer and a filling rubber layer. The material of the buffer layer may be a foam or a polyimide layer, and the material of the rigid layer may be stainless steel, a metal titanium layer or carbon fiber, etc. At the same time, a heat dissipation material such as a graphite or copper layer may be provided on the side of the rigid layer away from the first back plate.

[0062] In this embodiment, the boundary of the heat dissipation buffer layer 231 close to the curved portion 130 is retracted relative to the boundary of the first back plate 21 close to the curved portion 130, and the boundary of the filling glue layer 232 close to the curved portion 130 is retracted relative to the boundary of the second back plate 22 close to the curved portion 130.

[0063] In this embodiment, the display module 100 further includes a protective adhesive layer 80 disposed on the display panel 10 , and the protective adhesive layer 80 covers the bent portion 130 and a portion of the first body 110 and a portion of the second body 120 .

[0064] In this embodiment, the material of the protective adhesive layer 80 may be ultraviolet light curing adhesive.

[0065] It should be noted that the technical solution of the present application is applicable to both non-folding display devices and folding display devices; for non-folding display devices, such as the present application Figure 1 The middle cover layer 50 may be a hard cover. For a foldable display device, for example Figure 2 The cover layer 50 may be ultra-thin glass UTG and a protective layer PW with built-in optical adhesive.

[0066] It should be noted that in Figure 1 and Figure 2 In the structure, the driving chip IC can be directly bound to the second body 120 of the display panel 10, and the end of the second body 120 away from the bending part 130 is bound and connected to the flexible circuit board FPC. The flexible circuit board FPC can be connected to the heat dissipation buffer layer 231 or the rigid layer in the composite support layer 20 through the pressure-sensitive adhesive PSA.

[0067] It should be noted that in Figure 3 In the structure, the driver chip IC can be bound to the first body 110, one end of the flexible circuit board FPC is bound and connected to the first body 110, the other end of the flexible circuit board FPC is bound and electrically connected to the printed circuit board PCB, and the printed circuit board PCB can be connected to the side of the composite support layer 20 away from the first body 110 through the pressure-sensitive adhesive PSA, and Figure 3 The composite support layer 20 in the embodiment may only include the heat dissipation buffer layer 231, and the structure of the heat dissipation buffer layer 231 may be the same as Figure 1 The structure is the same as in; at the same time, Figure 3The cover layer 50 can be directly connected to the first body 110 through the optical adhesive layer 60 , and the polarizer 40 can be arranged on a side of the cover layer 50 away from the first body 110 .

[0068] For the current narrow-border display device, since the curvature of the first curved segment 131 is greater than the curvature of the second curved segment 132, and the curvature of the third curved segment 133 is greater than the curvature of the second curved segment 132, the bending stresses exerted on the first curved segment 131 and the third curved segment 133 are greater than the bending stress of the second curved segment 132. In order to balance the bending stresses of different curved segments, the present application can adjust the Young's modulus of different curved segments.

[0069] In this embodiment, the Young's modulus of the first curved segment 131 is smaller than that of the second curved segment 132 , and the Young's modulus of the third curved segment 133 is smaller than that of the second curved segment 132 .

[0070] See also Figure 5 , the Young's modulus of the first bending segment 131 and the third bending segment 133 are both smaller than the Young's modulus of the second bending segment 132, that is, the stiffness of the first bending segment 131 and the third bending segment 133 is smaller, and the bending stress generated by the deformation of the first bending segment 131 and the third bending segment 133 is smaller, which improves the bending stress of the bending portion 130 in the bending starting segment and the bending ending segment, and avoids the technical problem of breakage of the bending portion 130.

[0071] In this embodiment, the Young's modulus of the first curved segment 131 may be equal to the Young's modulus of the third curved segment 133 .

[0072] Or, for Figure 1 and Figure 2 Due to the fitting tolerance factor of the first back plate 21 and the second back plate 22, the edge of the second back plate 22 close to the bending portion 130 is retracted relative to the edge of the first back plate 21 close to the bending portion 130, resulting in the third bending segment 133 being unable to remain as an arc segment. Therefore, the present application makes the Young's modulus of the first bending segment 131 smaller than the Young's modulus of the third bending segment 133, so that the stiffness of the third bending segment 133 is greater than that of the first bending segment 131, thereby improving the outer contour of the third bending segment 133; at the same time, Figure 3In the structure, the printed circuit board PCB is arranged away from the end face of the composite support layer 20 close to the bending portion 130, and the end of the second body 120 close to the bending portion 130 lacks the support of the corresponding supporting structure, resulting in a smaller curvature of the third bending segment 133. Therefore, the present application increases the Young's modulus of the third bending segment 133 and improves the bending resistance of the third bending segment 133 so that the curvature of the third bending segment 133 is the same as that of the first bending segment 131.

[0073] See also Figure 6 The bending portion 130 includes a base substrate 140, a wire layer 190 disposed on the base substrate 140, and a flat layer 158 disposed on the wire layer 190. Since the Young's modulus of the first bending segment 131 and the Young's modulus of the third bending segment 133 are both smaller than the Young's modulus of the second bending segment 132, the present application can adjust the Young's modulus of the base substrate 140 and the wire layer 190 to adjust the Young's modulus of the first bending segment 131 and the third bending segment 133.

[0074] For example, the Young's modulus of the substrate 140 in the first bending section 131 is smaller than that in the second bending section 132 , and the Young's modulus of the substrate 140 in the third bending section 133 is smaller than that in the second bending section 132 .

[0075] Alternatively, the Young's modulus of the wire layer 190 in the first curved section 131 is smaller than the Young's modulus of the wire layer 190 in the second curved section 132, and the Young's modulus of the wire layer 190 in the third curved section 133 is smaller than the Young's modulus of the wire layer 190 in the second curved section 132;

[0076] Alternatively, the Young's modulus of the substrate substrate 140 in the first curved section 131 is smaller than the Young's modulus of the substrate substrate 140 in the second curved section 132, the Young's modulus of the substrate substrate 140 in the third curved section 133 is smaller than the Young's modulus of the substrate substrate 140 in the second curved section 132, and the Young's modulus of the conductor layer 190 in the first curved section 131 is smaller than the Young's modulus of the conductor layer 190 in the second curved section 132, and the Young's modulus of the conductor layer 190 in the third curved section 133 is smaller than the Young's modulus of the conductor layer 190 in the second curved section 132.

[0077] See also Figure 6A first groove 141 a is formed on the base substrate 140 in the first curved section 131 , and a second groove 141 b is formed on the base substrate 140 in the third curved section 133 . The first groove 141 a and the second groove 141 b face the wire layer 190 .

[0078] In this embodiment, since the Young's modulus of the first curved segment 131 and the Young's modulus of the third curved segment 133 are both smaller than the Young's modulus of the second curved segment 132, the depths of the first groove 141a and the second groove 141b are equal, and the opening area of ​​the first groove 141a away from the wire layer 190 is greater than or equal to the opening area of ​​the second groove 141b away from the wire layer 190; or, the opening areas of the first groove 141a and the second groove 141b away from the wire layer 190 are equal, and the depth of the first groove 141a is greater than or equal to the depth of the second groove 141b.

[0079] For example, in Figure 6 In the structure, the present application can set a first groove 141a and a second groove 141b on the first flexible substrate 141, the first groove 141a is located in the first bending segment 131, and the second groove 141b is located in the third bending segment 133. The setting of the first groove 141a and the second groove 141b reduces the material of the first flexible substrate 141 in the corresponding bending segment, reduces the Young's modulus in the corresponding bending segment, that is, reduces the stiffness of the first bending segment 131 and the third bending segment 133, and reduces the bending stress of the first bending segment 131 and the third bending segment 133.

[0080] At the same time, when the Young's modulus of the first curved segment 131 is equal to the Young's modulus of the third curved segment 133, the depth of the first groove 141a and the depth of the second groove 141b can be equal, and the opening area of ​​the first groove 141a away from the wire layer 190 can be equal to the opening area of ​​the second groove 141b away from the wire layer 190; when the Young's modulus of the first curved segment 131 is smaller than the Young's modulus of the third curved segment 133, the present application can make the depth of the first groove 141a greater than the depth of the second groove 141b, or / and the opening area of ​​the first groove 141a away from the wire layer 190 greater than the opening area of ​​the second groove 141b away from the wire layer 190.

[0081] See also Figures 7 to 9The conductor layer 190 includes a plurality of transmission lines 191. The area of ​​the transmission lines 191 per unit area in the first curved segment 131 is smaller than the area of ​​the transmission lines 191 per unit area in the second curved segment 132. The area of ​​the transmission lines 191 per unit area in the third curved segment 133 is smaller than the area of ​​the transmission lines 191 per unit area in the second curved segment 132.

[0082] For example, in Figure 7 In the structure, the transmission line 191 includes a plurality of connected fold line segments 191a, the distance between two adjacent fold line segments 191a in the first curved segment 131 is greater than the distance between two adjacent fold line segments 191a in the second curved segment 132, and the distance between two adjacent fold line segments 191a in the third curved segment 133 is greater than the distance between two adjacent fold line segments 191a in the second curved segment 132.

[0083] In this embodiment, the larger the spacing between the fold line segments 191a, the smaller the number of fold line segments 191a arranged in the unit area of ​​the curved segment, and the smaller the Young's modulus; the smaller the spacing between the fold line segments 191a, the greater the number of fold line segments 191a arranged in the unit area of ​​the curved segment, and the larger the Young's modulus. Therefore, the present application can adjust the Young's modulus of different curved segments by adjusting the spacing between the fold line segments 191a in the transmission line 191.

[0084] For example, in Figure 8 In the structure of Figure 7 The structure is similar to Figure 8 The transmission line 191 in the second curved segment 132 is composed of a metal wire with a mesh structure, and the fold line segment 191a in the first curved segment 131 and the third curved segment 133 is composed of a single fold line, that is, the area of ​​the metal wire per unit area in the second curved segment 132 is greater than the area of ​​the metal wire per unit area in the first curved segment 131 and the third curved segment 133, and the area of ​​the metal wire per unit area is positively correlated with the Young's modulus of the corresponding curved segment. Therefore, the present application can adjust the Young's modulus of different curved segments by adjusting the area of ​​the metal wire per unit area.

[0085] For example, in Fig. 9 In the structure, a plurality of via holes 191b are provided on the transmission line 191, and the via holes 191b may be through holes or blind holes, and the distribution density of the via holes 191b in the first curved section 131 is greater than the distribution density of the via holes 191b in the second curved section 132, and the distribution density of the via holes 191b in the third curved section 133 is greater than the distribution density of the via holes 191b in the second curved section 132.

[0086] In this embodiment, the greater the distribution density of the vias 191b, that is, the greater the number of the vias 191b per unit area, the smaller the area of ​​the transmission line 191 per unit area of ​​the curved section, and the smaller the Young's modulus of the curved section; the smaller the distribution density of the vias 191b, that is, the smaller the number of the vias 191b per unit area, the larger the area of ​​the transmission line 191 per unit area of ​​the curved section, and the larger the Young's modulus of the curved section. Therefore, the present application can adjust the Young's modulus of different curved sections by adjusting the distribution density of the vias 191b.

[0087] It should be noted that the present application can also adjust the Young's modulus of different bending sections by adjusting the aperture of the via hole 191b and the depth of the via hole 191b.

[0088] It should be noted that the wire layer 190 of the present application may be at least one layer of the gate layer 155 or the source and drain layer 157 .

[0089] Since the first bending section 131 and the third bending section 133 are in arc shape, if only the Young's modulus of the second bending section 132 is increased to increase the bending resistance of the second bending section 132 , the second bending section 132 will still be slightly curved under the action of the first bending section 131 and the third bending section 133 .

[0090] See also Fig.10 A fixing part 30 is disposed on a surface of the composite supporting layer 20 close to the curved section, and a surface of the fixing part 30 away from the composite supporting layer 20 is connected to the second curved section 132 .

[0091] In this embodiment, the present application can set a fixing member 30 between the composite supporting layer 20 and the bending portion 130 to fix the second bending segment 132 so that the second bending segment 132 is a straight segment; for example, the second bending segment 132 can be set perpendicular to the first body 110 and the second body 120.

[0092] In this embodiment, the fixing member 30 may be a double-sided adhesive tape; Figure 1 Taking the structure as an example, one end of the double-sided tape can be bonded to the surface of the heat dissipation buffer layer 231 close to the bending section, and the other end of the double-sided tape can be bonded to the surface of the second bending section 132 close to the composite support layer 20.

[0093] In this embodiment, in order to prevent the fixing member 30 from adhering to the first curved segment 131 or the third curved segment 133 so as to change the morphology of the first curved segment 131 or the third curved segment 133, the surface area of ​​the fixing member 30 of the present application away from the composite supporting layer 20 needs to be less than or equal to the area of ​​the second curved segment 132.

[0094] In this embodiment, in the side view of the display module 100 , the ratio of the length of the second curved section 132 to the length of the curved portion 130 is 0.1 to 0.9.

[0095] It should be noted that the length of the second curved section 132 of the present application is determined by the distance between the first body 110 and the second body 120. The distance between the first body 110 and the second body 120 is smaller in small-sized products, and larger in large-sized products. Therefore, the present application can set the second curved section 132 of different lengths according to products of different sizes.

[0096] The present application also provides a display device, which includes the above-mentioned display module. The display device can be: a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0097] The present application discloses a display module and a display device; the display module comprises a first body, a bending part and a second body connected in sequence, the bending part comprises a first bending section, a second bending section and a third bending section connected in sequence, the curvature of the first bending section is greater than the curvature of the second bending section, the curvature of the third bending section is greater than the curvature of the second bending section, and the first bending section and the third bending section are arc sections; the present application reduces the bending stress of the first bending section at the bending starting section and the third bending section at the bending ending section by setting the first bending section and the third bending section as arc sections, thereby avoiding the technical problem of fracture of the bending part, and at the same time, the curvatures of the first bending section and the third bending section are both greater than the curvature of the second bending section, thereby reducing the width occupied by the second bending section at the frame, thereby realizing a narrow frame design of the product.

[0098] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0099] The technical solutions provided by the embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display module, characterized in that: The invention comprises a first body, a second body and a bending portion connecting the first body and the second body; wherein the bending portion comprises: A first curved section connected to the first body; a second curved section connected to an end of the first curved section away from the first body; a third curved section connected between the second curved section and the second body; The curvature of the first curved segment is greater than that of the second curved segment, the curvature of the third curved segment is greater than that of the second curved segment, and the first curved segment and the third curved segment are arc segments.

2. The display module according to claim 1, characterized in that: The Young's modulus of the first bending segment is smaller than that of the second bending segment, and the Young's modulus of the third bending segment is smaller than that of the second bending segment.

3. The display module according to claim 2, characterized in that: The Young's modulus of the first bending segment is less than or equal to the Young's modulus of the third bending segment.

4. The display module according to claim 2, characterized in that: The bending portion includes a base substrate and a conductor layer provided on the base substrate; The Young's modulus of the substrate in the first curved section is smaller than that in the second curved section, and the Young's modulus of the substrate in the third curved section is smaller than that in the second curved section. Or / and, the Young's modulus of the wire layer in the first curved segment is smaller than the Young's modulus of the wire layer in the second curved segment, and the Young's modulus of the wire layer in the third curved segment is smaller than the Young's modulus of the wire layer in the second curved segment.

5. The display module according to claim 4, characterized in that: A first groove is formed on the substrate in the first curved section, and a second groove is formed on the substrate in the third curved section. The first groove and the second groove face the wire layer.

6. The display module according to claim 5, characterized in that: The depths of the first groove and the second groove are equal, and the opening area of ​​the first groove away from the wire layer is greater than or equal to the opening area of ​​the second groove away from the wire layer; Alternatively, the opening areas of the first groove and the second groove away from the conductive line layer are equal, and the depth of the first groove is greater than or equal to the depth of the second groove.

7. The display module according to claim 4, characterized in that: The conductor layer includes a plurality of transmission lines, wherein the area of ​​the transmission lines per unit area in the first curved segment is smaller than the area of ​​the transmission lines per unit area in the second curved segment, and the area of ​​the transmission lines per unit area in the third curved segment is smaller than the area of ​​the transmission lines per unit area in the second curved segment.

8. The display module according to any one of claims 1 to 7, characterized in that: The display module also includes a composite functional layer arranged between the first body and the second body, a fixing piece is arranged on a surface of the composite functional layer close to the curved section, and a surface of the fixing piece away from the composite functional layer is connected to the second curved section.

9. The display module according to claim 8, characterized in that: The surface area of ​​the fixing member at a side away from the composite functional layer is smaller than or equal to the area of ​​the second curved section.

10. The display module according to any one of claims 1 to 7, characterized in that: The curvature of the second curved section is 0.

11. The display module according to any one of claims 1 to 7, characterized in that: In a side view of the display module, a ratio of a length of the second curved segment to a length of the curved portion is 0.1 to 0.

9.

12. A display device, characterized in that: The display device comprises the display module according to any one of claims 1 to 11.

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