Display module and display device

Abstract

The present application discloses a display module and a display device. The display module comprises a display panel and a flexible circuit board. The display panel comprises a display portion, a first binding portion, and a wiring portion; the flexible circuit board comprises a second binding portion, a first extension portion, and a second extension portion which are connected to each other; the second binding portion is bound and connected to the first binding portion; the first extension portion overlaps the wiring portion; and the width of the second extension portion is less than the width of the first extension portion and greater than two-thirds times the width of the first extension portion.

Description

Display module and display device

[0001] This application claims priority to Chinese Patent Application No. 202410808821.1, filed on June 21, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a display module and a display device. BACKGROUND

[0003] The flexible circuit board in the display device is usually connected with the binding area of the display panel in the display device to transmit data signals. After the flexible circuit board is connected with the binding terminals in the display panel, the flexible circuit board extends to the end away from the display panel, and the extension part of the flexible circuit board occupies the internal space of the display device. SUMMARY

[0004] The present application provides a display module and a display device to solve the technical problem of compact internal space layout of the existing display device.

[0005] In a first aspect, the present application provides a display module, comprising:

[0006] a display panel, comprising a display part, a first binding part located on one side of the display part, and a wiring part located between the first binding part and the display part, wherein the first binding part is provided with a plurality of first terminals;

[0007] a flexible circuit board, comprising:

[0008] a second binding part, wherein the second binding part is provided with a plurality of second terminals, and the second terminals are connected with the corresponding first terminals;

[0009] a first extension part connected with the second binding part, wherein the first extension part extends from the second binding part towards the display part, and the orthographic projection of the first extension part on the display panel is located in the wiring part;

[0010] a second extension part connected with the second binding part, wherein the second extension part extends from the second binding part to the side away from the first extension part;

[0011] wherein, in the direction from the first extension part to the second extension part, the width of the first extension part is greater than the width of the second extension part, and the width of the second extension part is greater than two-thirds of the width of the first extension part.

[0012] In a second aspect, the present application further provides a display device, comprising the above-mentioned display module. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 is a schematic diagram of the connection between a display panel and a flexible circuit board in a display module provided by the present application;

[0014] Fig. 2 is a schematic diagram of the connection between a display panel and a flexible circuit board in a display module provided by the present application;

[0015] Fig. 3 is a partial cross-sectional view of a display module provided by the present application;

[0016] Fig. 4 is a first structure diagram of a flexible circuit board in a display module provided by the present application;

[0017] Fig. 5 is a structure diagram of a single-layer board on the lowermost single-layer board of a flexible circuit board in a display module provided by the present application;

[0018] Fig. 6 is a second structure diagram of a flexible circuit board in a display module provided by the present application;

[0019] Fig. 7 is a cross-sectional view of section AA in Fig. 6;

[0020] Fig. 8 is a fourth structure diagram of a flexible circuit board in a display module provided by the present application;

[0021] Fig. 9 is a fifth structure diagram of a flexible circuit board in a display module provided by the present application;

[0022] Fig. 10 is a cross-sectional view of section MM in Fig. 4. Embodiments of the present application

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application.

[0024] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In addition, the terms "first", "second", etc. are used only for descriptive purposes and should not be construed as implying or suggesting relative importance or an indicated number of technical features. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality of" is two or more, at least one of which can be one, two or more, unless otherwise explicitly specified.

[0026] Referring to FIG. 1, which is an unfolded structure diagram of a prior display device, the prior display device 1 includes a display panel 2 and a flexible circuit board 3, the flexible circuit board 3 is bound to the terminals on the display panel 2, and the flexible circuit board 3 extends away from the display panel 1, the extension of the flexible circuit board 3 has a certain size, which occupies the internal space of the display device. The present application is based on this technical problem and proposes a display module.

[0027] Referring to FIGS. 2 to 9, the present application provides a display module 100, which can include a display panel 200 and a flexible circuit board 300 bound to the display panel 200.

[0028] In the present embodiment, the display panel 200 can include a display portion 210, a first binding portion 220 located on one side of the display portion 210, and a wiring portion 230 located between the first binding portion 220 and the display portion 210, the first binding portion 220 is provided with a plurality of first terminals 220a; the flexible circuit board 300 can include a second binding portion 310, the second binding portion 310 is provided with a plurality of second terminals 310a, the second terminals 310a are bound to the corresponding first terminals 220a.

[0029] In the present embodiment, the flexible circuit board 300 further includes a first extension portion 320 connected to the second binding portion 310, the first extension portion 320 extends from the second binding portion 310 towards the display portion 210, and the orthographic projection of the first extension portion 320 on the display panel 200 is located in the wiring portion 230.

[0030] In the present embodiment, the flexible circuit board 300 further includes a second extension portion 330 connected to the second binding portion 310, the second extension portion 330 extends from the second binding portion 310 to a side away from the first extension portion 320.

[0031] In the present embodiment, in the direction from the first extension portion to the second extension portion, the width of the first extension portion is greater than the width of the second extension portion, and the width of the second extension portion is greater than two-thirds of the width of the first extension portion.

[0032] The first extending part 320 of the flexible circuit board 300 overlaps the wiring part 230 of the display panel 200, and the flexible circuit board 300 is connected to the terminal on the display panel 200 by binding, and the first extending part 320 is attached to the wiring part 230. Compared with the structure of FIG. 1, the flexible circuit board 300 of the present application is reversely bound, that is, the extending part in the flexible circuit board 300 is moved from the end away from the display panel 200 to the upper side of the wiring part 230, that is, the extending part in the flexible circuit board 300 can be attached to the surface of the wiring part 230 of the display panel 200. At the same time, in the direction from the first extending part 320 to the second extending part 330, the width of the second extending part 330 is less than the width of the first extending part 320 and greater than twice the width of the first extending part 320. Under the condition that the second extending part 330 has sufficient area for the adsorption jig to adsorb, the width of the second extending part 330 cannot exceed the width of the first extending part 320, and the width of the second extending part 330 is reduced as much as possible, which reduces the space occupied by the flexible circuit board 300 inside the display module 100, improves the technical problem of compact internal space layout of the display device, and at the same time, the space reduced by the flexible circuit board 300 can be used to arrange the battery of the product, thereby increasing the capacity of the battery and improving the endurance of the product.

[0033] It should be noted that the width direction of the present application is the direction from the first extending part 320 to the second extending part 330 of the flexible circuit board 300, and the thickness direction is perpendicular to the light emitting surface of the display panel 200.

[0034] It should be noted that the display panel 200 of the present application can be a flexible panel, for example, the wiring part 230 includes a bending part 231, after the bending part 231 is bent, the first binding part 220 can be bent to the side of the display part 210 away from the light emitting direction.

[0035] It should be noted that after the display panel 200 and the flexible circuit board 300 are bound, the display panel 200 needs to be bent, and when the display panel 200 is bent, the flexible circuit board 300 needs to be turned over from the light emitting surface of the display panel 200 to the backlight surface of the display panel 200, so the flexible circuit board 300 needs to be adsorbed by the adsorption jig to realize the turning over of the flexible circuit board 300.

[0036] In the present embodiment, the second extending part 330 extends away from the first extending part 320, so that the second extending part 330 has sufficient space to set the adsorption area 331, and the adsorption jig can be adsorbed in the adsorption area 331 on the second extending part 330 to realize the turning over of the flexible circuit board 300, and at the same time, there is no need to additionally design a compensation structure for the adsorption jig to adsorb.

[0037] It should be noted that the display panel 200 can be an organic light-emitting display panel; for example, taking the organic light-emitting display panel as an example, referring to FIG. 3, the display panel 200 can include a display layer 10, which can include a substrate, an array driving layer disposed on the substrate, a pixel definition layer disposed on the array driving layer, a light-emitting device layer disposed in the same layer as the pixel definition layer, an encapsulation layer disposed on the pixel definition layer, and a polaroid layer 30 disposed on the encapsulation layer.

[0038] In the embodiment, referring to FIG. 3, the display panel 200 can further include a touch layer 20, a polaroid layer 30, and a cover layer 40; secondly, the display panel 200 can further include a color film layer (not shown), and the color film layer and the polaroid layer 30 can be selected according to the specific structure, and at least one of the two, the position of the touch layer 20 can be disposed on the encapsulation layer or between the encapsulation layer and the substrate, which is not limited in the present application.

[0039] In the embodiment, the substrate is used to support various film layers disposed on the substrate, and the substrate can be a flexible substrate that can be bent, folded, curled, etc. Examples of flexible materials for flexible substrates include polyimide (PI), but are not limited to polyimide (PI).

[0040] In the embodiment, the array driving layer can include a plurality of thin film transistors, which can be etch-stop type, back channel etch type, or divided into bottom-gate thin film transistors, top-gate thin film transistors, etc. according to the position of the gate and the active layer, or divided into N-type thin film transistors, P-type thin film transistors according to the performance of the thin film transistors.

[0041] It should be noted that the light-emitting device of the display panel 200 of the present application can also be a Mini LED, a Micro LED, or other small-size light-emitting device.

[0042] In the embodiment, referring to FIG. 3, the display panel 200 further includes a first back plate 510 and a second back plate 520 which are separately arranged, and the material of the back plate can be polyethylene terephthalate (PET).

[0043] In the embodiment, referring to FIG. 3, the display panel 200 further includes a first support layer 610 and a second support layer 620 disposed between the first back plate 510 and the second back plate 520, the first support layer 610 and the first back plate 510 are bonded by a glue layer, the second support layer 620 and the second back plate 520 are bonded by a glue layer, the material of the first support layer 610 can be stainless steel, and the material of the second support layer 620 can be foam or polyethylene terephthalate (PET) etc.

[0044] It should be noted that the following embodiments take the arrangement direction of the plurality of first terminals 220a in the display panel 200 as the first direction X, and the direction from the first binding portion 220 to the display portion 210 of the display panel 200 before being bent as the second direction Y.

[0045] The structure of the flexible circuit board 300 of the present application will now be described in conjunction with specific embodiments.

[0046] In the present embodiment, the second binding portion 310 includes one layer of single-layer boards 400, and the first and second extension portions 320 and 330 each include at least two layers of stacked single-layer boards 400.

[0047] The present application uses at least two layers of stacked single-layer boards 400 to form the first and second extension portions 320 and 330, which improves the wiring space in the thickness direction of the two extension portions, reduces the width of the two extension portions, reduces the space occupied by the extension portions in the display device in the flexible circuit board 300, and improves the technical problem of compact internal space layout of the display device. At the same time, the space reduced by the flexible circuit board 300 can be used to arrange the battery of the product, thereby increasing the capacity of the battery and improving the endurance of the product.

[0048] In the present embodiment, the second binding portion 310 can include one or more than two layers of stacked single-layer boards 400, and the first and second extension portions 320 and 330 can include at least two layers of stacked single-layer boards 400. The increase in the number of single-layer boards 400 can increase the wiring space in the thickness direction of the flexible circuit board 300, thereby reducing the width of the flexible circuit board 300. The following embodiments will be described taking the second binding portion 310 including only one layer of single-layer boards 400 as an example.

[0049] Please refer to FIG. 10, which is a sectional view of section MM in FIG. 4. FIG. 10 only lists the sectional view of the second binding portion 310 and the second extension portion 330. The second binding portion 310 includes one layer of single-layer boards 400, and the second extension portion 330 includes three layers of single-layer boards 400.

[0050] In the structure of FIG. 10, each single-layer board 400 can include an insulating substrate 410, a first conductive layer 420, a first insulating layer 440, a second conductive layer 430, and a second insulating layer 450. The first conductive layer 420 is arranged on the surface of the insulating substrate 410 close to the display panel 200, the first insulating layer 440 is arranged on the surface of the first conductive layer 420 close to the display panel 200, the second conductive layer 430 is arranged on the surface of the insulating substrate 410 away from the display panel 200, and the second insulating layer 450 is arranged on the surface of the second conductive layer 430 close to the display panel 200.

[0051] In the embodiment, the material of the insulating substrate 410 can be a flexible insulating material such as polyimide, the first conductive layer 420 and the second conductive layer 430 can be a metal material with good conductivity such as copper, and the material of the first insulating layer 440 and the second insulating layer 450 can be a flexible insulating material such as polyimide.

[0052] In the structure of FIG. 10, the first conductive layer 420 can be formed by stacking two layers of copper, and the insulating adhesive 460 is arranged between the first insulating layer 440 and the first conductive layer 420 and between the second insulating layer 450 and the second conductive layer 430, so that the insulating layer and the conductive layer are bonded through the insulating adhesive 460; meanwhile, the electromagnetic shielding layer 470 is arranged on the surface of the outermost first insulating layer 440 and the second insulating layer 450 to shield the interference of external electrical signals on the inside of the flexible circuit board 300.

[0053] In the second extension part 330 of FIG. 10, one layer of insulating layer can be shared between two adjacent single-layer boards 400, for example, the second insulating layer 450 of the middle single-layer board 400 and the first insulating layer 440 of the upper single-layer board 400 are shared, and the first insulating layer 440 of the middle single-layer board 400 and the second insulating layer 450 of the lower single-layer board 400 are shared.

[0054] In the structure of FIG. 10, the single-layer board 400 in the second binding part 310 is arranged in the same layer as the lowermost single-layer board 400 in the second extension part 330, for example, the insulating substrate 410, the first conductive layer 420, the first insulating layer 440, the second conductive layer 430, and the second insulating layer 450 in each single-layer board 400 are formed in the same process.

[0055] In the structure of FIG. 10, the second binding part 310 is provided with one layer of insulating substrate 410 and two layers of conductive layer, and the second extension part 330 is provided with three layers of insulating substrate 410 and six layers of conductive layer, and the multi-layer stacked conductive layer increases the wiring space of the corresponding extension part of the flexible circuit board 300 and reduces the width of the extension part.

[0056] It should be noted that the structure of the first extension part 320 of the present application can be the same as that of the second extension part 330.

[0057] It should be noted that the first terminal 220a on both sides of the first binding part 220 is usually connected with the sensing electrode line and the driving electrode line in the touch layer, and the conductive layer in the first extension part 320 connects the electrode lines transmitting the same sensing signal or the electrode lines transmitting the same driving signal on both sides to form a loop.

[0058] It should be noted that, due to the poor water oxygen resistance of the single-layer plate 400, water oxygen can enter the display panel through the metal circuit layer in the flexible circuit board 300, causing the display panel to be abnormal, so the step part of the flexible circuit board 300 and the display panel 200 needs to be additionally provided with an adhesive; and the present application stacks the first extension 320 and the second extension 330 with multiple single-layer plates 400, and the insulating layer in the outer single-layer plate 400 can be used as a protective layer of the flexible circuit board, which not only avoids the invasion of water oxygen into the flexible circuit board 300, but also avoids the invasion of water oxygen into the display panel 200 through the flexible circuit board 300; at the same time, the multiple single-layer plates 400 reduce the step difference between the second extension 300 and the back of the display panel 200, and reduce the setting of the adhesive.

[0059] It should be noted that the surface of the electromagnetic shielding layer 470 facing the display panel 200 is also provided with an adhesive material (not shown) for bonding the flexible circuit board 300 and the display panel 200.

[0060] Since the second extension 330 needs to be adsorbed by the adsorption jig, the adsorption area 331 needs to be provided on the second extension 330, and the roughness of the surface of the adsorption area 331 needs to be less than a certain value, so that it can be adsorbed by the adsorption jig.

[0061] Please refer to FIG. 4, the second extension 330 includes an adsorption area 331 and a functional area 332, the functional area 332 is provided with a functional element 332a, and the adsorption area 331 and the functional area 332 are non-overlapping.

[0062] In this embodiment, the adsorption area 331 is used for adsorption by the adsorption jig, and needs to ensure the flatness of the surface, while the functional area 332 is used for setting the functional element 332a, and the surface of the functional area 332 cannot be adsorbed by the adsorption jig, so the adsorption area 331 and the functional area 332 are non-overlapping, i.e. the adsorption area 331 and the functional area 332 are spaced apart.

[0063] In this embodiment, in order to ensure that the adsorption jig has sufficient adsorption force on the surface of the adsorption area 331, the roughness of the surface of the adsorption area 331 needs to be small enough, so that the surface roughness of the adsorption area 331 on the side of the second extension 330 away from the display panel 200 is smaller than the surface roughness of the functional area 332; for example, the surface of the adsorption area 331 is a flat surface.

[0064] In the embodiment, three adsorption areas 331 can be arranged on the second extending part 330, and two of the three adsorption areas 331 can be arranged on the two sides of the second extending part 330, i.e., the two adsorption areas 331 can be arranged on the ends of the second extending part 330, and the remaining one of the three adsorption areas 331 can be arranged on the central area of the second extending part 330, i.e., the center line of the adsorption area 331 can coincide with the center line of the second extending part 330, and the functional area 332 of the application can be arranged between the two adjacent adsorption areas 331.

[0065] It should be noted that the surface of the adsorption area 331 of the application cannot be provided with a corresponding functional device, such as a structure recessed in the surface of the second extending part 330 or protruding from the surface of the second extending part 330.

[0066] In the embodiment, the width and length of the adsorption area 331 are both in the range of 6-8 mm; for example, each adsorption area 331 can be a square or rectangular area.

[0067] It should be noted that the functional element 332a can be a resistor, a capacitor, or the like.

[0068] Since the first extending part 320 of the application is attached to the wiring part 230, the first extending part 320 needs to be pressed to bond the first extending part 320 and the wiring part 230, and when the functional element 332a protrudes on the pressing area 321 of the first extending part 320, the area provided with the functional element 332a cannot be pressed during the bending process of the display panel 200, thereby causing the peeling problem between the first extending part 320 and the display panel 200; and the second extending part 330 of the application is composed of multiple single-layer plates 400, and the functional element 332a is arranged in the non-adsorption area of the second extending part 330, so that the adsorption jig is adsorbed in the adsorption area 331 of the second extending part 330 during the bending process of the display panel 200, and the pressing area 321 of the first extending part 320 is pressed, thereby avoiding the peeling problem between the first extending part 320 and the display panel 200.

[0069] Referring to FIG. 4, the first extending part 320 of the application is provided with two pressing areas 321, and the two pressing areas 321 are arranged at the two ends of the first extending part 320, and the surface of the pressing area 321 is not provided with the functional element 332a; or, the first extending part 320 can be the pressing area 321.

[0070] In the embodiment, the width and length of the pressing area 321 are both in the range of 6-8 mm; for example, each pressing area 321 can be a square or rectangular area. Alternatively, the area of the pressing area 321 can be the same as that of the adsorption area 331.

[0071] In the display module 100 of the present application, when the width of the second extending part 330 in the second direction Y is too large, the second extending part 330 will occupy more internal space of the display device, therefore, in the direction of the first extending part 320 to the second extending part 330, the width of the first extending part 320 is larger than the width of the second extending part 330, and the width of the second extending part 330 is reduced as much as possible to avoid the second extending part 330 occupying more internal space of the display device.

[0072] In the present embodiment, since the metal wire layer is also arranged on the second extending part 330, and when the width of the second extending part 330 is reduced, the arrangement space of the metal wire layer on the second extending part 330 will be limited, therefore, the present application can increase the number of the single layer plates 400 in the second extending part 330, so that the thickness of the first extending part 320 is smaller than the thickness of the second extending part 330, that is, the number of the single layer plates 400 in the first extending part 320 is smaller than the number of the single layer plates 400 in the second extending part 330; for example, the number of the single layer plates 400 in the second extending part 330 can be 6 layers, and the number of the single layer plates in the first extending part 320 can be 4 layers, and the increase of the thickness of the second extending part 330 makes the metal wires in the second extending part 330 can be arranged in multiple layers, which solves the technical problem that the arrangement space of the metal wire layer is small.

[0073] Meanwhile, considering the process factor, the number of the single layer plates 400 in the first extending part 320 is equal to the number of the single layer plates 400 in the second extending part 330, for example, the number of the single layer plates 400 in the first extending part 320 and the second extending part 330 can be 6 layers, that is, each single layer plate 400 in the first extending part 320 and the corresponding single layer plate 400 in the second extending part 330 can be formed in the same process.

[0074] In the display module 100 of the present application, in the direction of the first extending part 320 to the second extending part 330, if the width of the first extending part 320 is too long, for example, when the first extending part 320 is bonded with the bending part 231 in the wiring part 230 in the structure of FIG. 2, due to the action of gravity, the first extending part 320 and the bending part 231 can be peeled off, therefore, the part of the first extending part 320 overlapping with the display panel 200 cannot exceed the bending part 231; meanwhile, since the second extending part 320 needs to be provided with an adsorption area, in order to ensure the area of the adsorption area, the width of the second extending part 330 cannot be too small, and when the width of the second extending part 330 is too large, the space occupied by the second extending part 320 will increase, and the space saved for the whole machine will decrease, therefore, the width of the second extending part 330 needs to be greater than two-thirds of the width of the first extending part 320.

[0075] It should be noted that in the structure of FIG. 2, the driving chip 240 is further arranged in the wiring portion 230, and the driving chip 240 protrudes from the surface of the display panel 200. Since the first extending portion 320 covers the driving chip 240, when the first extending portion 320 is attached to the wiring portion 230, the position of the first extending portion 320 corresponding to the driving chip 240 will be protruding, which is not conducive to the attachment of the first extending portion 320 and the wiring portion 230.

[0076] In the embodiment, referring to FIG. 4, the first extending portion 320 is provided with a first opening 322 on the side of the display panel 200, and the driving chip 240 is arranged in the first opening 322. The first opening 322 is arranged so that the driving chip 240 can be arranged in the first opening 322, and the first extending portion 320 does not need to be protruding when it is attached to the wiring portion 230, and the first extending portion 320 around the driving chip 240 can be attached to the wiring portion 230.

[0077] In the embodiment, when the thickness of the first extending portion 320 is greater than the thickness of the driving chip 240, the first opening 322 does not cut through the first extending portion 320; if the thickness of the first extending portion 320 is less than the thickness of the driving chip 240, the first opening 322 is a through hole, and part of the driving chip 240 will protrude from the surface of the first extending portion 320 away from the display panel 200. Therefore, in order to ensure the flatness of the surface of the first extending portion 320, the thickness of the first extending portion 320 is usually greater than the thickness of the driving chip 240.

[0078] In the display module 100 of the present application, a plurality of alignment marks are arranged in the wiring portion 230, and the plurality of alignment marks are arranged non-overlappingly with the first extending portion 320. When the second terminal 310a in the flexible circuit board 300 is bound to the first terminal 220a in the display panel 200, corresponding alignment marks are needed to ensure the alignment accuracy of the second binding portion 310 and the first binding portion 220. Therefore, if the first extending portion 320 covers this area, the alignment marks cannot be obtained, which reduces the alignment accuracy of the second binding portion 310 and the first binding portion 220. The present application can be provided with a plurality of through holes in the first extending portion 320, so that when the first extending portion 320 is attached to the wiring portion 230, the alignment marks are not blocked by the first extending portion 320, thereby solving the technical problem of inaccurate alignment of the second binding portion 310 and the first binding portion 220.

[0079] In the above embodiment, the second binding portion 310 is a single-layer board 400, the first extending portion 320 and the second extending portion 330 are a plurality of stacked single-layer boards 400, and in order to reduce the process difficulty, the single-layer board 400 of the second binding portion 310 and the lowermost single-layer board 400 of the first extending portion 320 and the second extending portion 330 can be arranged integrally, for example, the structure of FIG. 10.

[0080] For example, referring to FIG. 4, in the first direction X, the length of the second binding portion 310 is equal to the length of the first extension portion 320 and the length of the second extension portion 330, and the first direction X is perpendicular to the directions of the first extension portion 320 to the second extension portion 330.

[0081] In the present embodiment, the single-layer plate 400 of the second binding portion 310 is integrally provided with the single-layer plate 400 of the lowermost layer of the first extension portion 320 and the second extension portion 330, and in the multi-layer single-layer plate 400 of the first extension portion 320 and the second extension portion 330, the upper stacked multi-layer single-layer plate 400 can be directly stacked on the single-layer plate 400 of the lowermost layer of the corresponding first extension portion 320 and the second extension portion 330; or, the structure of the second layer and above of the single-layer plate 400 in the first extension portion 320 and the second extension portion 330 can be the structure of FIG. 5, that is, the area corresponding to the plurality of second terminals 310a in the middle is removed to form the structure of FIG. 6.

[0082] Referring to FIG. 7, which is a cross-sectional view of the interface AA in FIG. 6 of the present application, when the second binding portion 310 and the first binding portion 220 are bound, the second binding portion 310 needs to be pressed by a pressure head, but because the single-layer plate 400 of the lowermost layer of the first extension portion 320, the second extension portion 330 and the second binding portion 310 is integrally provided, the pressure applied by the pressure head to the middle area of the second binding portion 310 is greater than the pressure applied to the two side areas of the second binding portion 310, and because the first binding portion 220 and the second binding portion 310 are electrically connected through the conductive particles 500, the pressure received by the conductive particles 500 in the two side areas is less than the pressure received by the conductive particles 500 in the middle area, the deformation degree of the conductive particles 500 in the two side areas is different, the contact area of the conductive particles 500 in the middle area with the terminals on the two sides is greater than the contact area of the conductive particles 500 in the edge area with the terminals on the two sides, and thus the electrical connection effect of the terminals in different areas is different.

[0083] Referring to FIG. 8, in the first direction X, the length of the second binding portion 310 is less than the length of the first extension portion 320, and the length of the second binding portion 310 is less than the length of the second extension portion 330, and the first direction X is perpendicular to the directions of the first extension portion 320 to the second extension portion 330.

[0084] In the structure of FIG. 8, the length of the second binding portion 310 in the first direction X is less than the length of the first extension portion 320 and the second extension portion 330 in the first direction X, that is, the part of the single-layer plate 400 at both ends of the second binding portion 310 in the first direction X and the multi-layer plate structure above the area are removed; or, the structure of the part of the single-layer plate 400 at both ends of the second binding portion 310 in the first direction X is removed.

[0085] In the structure of FIG. 8, the reduction of the area of the second bonding portion 310 makes the pressure applied by the pressure head on each area of the second bonding portion 310 more uniform, improves the technical problem that the pressure applied by the pressure head on the middle area and the two side areas of the second bonding portion 310 has a large difference, and further improves the technical problem that the pressure received by the conductive particles 500 in the two side areas and the pressure received by the conductive particles 500 in the middle area have a difference, so that the terminal contact area of the conductive particles 500 in the middle area and the terminal contact area of the conductive particles 500 in the edge area are equal.

[0086] In the structure of FIG. 9, the second bonding portion 310 includes a bonding area 311 and a filling area 312 arranged on both sides of the bonding area 311, and a plurality of second terminals 310a are arranged in the bonding area 311; each filling area 312 further includes a filling portion 312a, and the sum of the thickness of the filling portion 312a and the thickness of the second bonding portion 310 is equal to the thickness of the first extending portion 320 or the thickness of the second extending portion 330.

[0087] At the same time, the pressure applied by the pressure head on the middle area of the second bonding portion 310 is more uniform, so the distance between the two adjacent second terminals 310a in the bonding area 311 in FIG. 9 can be smaller than the distance between the two adjacent second terminals 310a in FIG. 8, that is, the plurality of second terminals 310a in FIG. 9 are gathered to the middle area of the second bonding portion 310, so that the distance between the outermost second terminal 310a in FIG. 9 and the adjacent boundary of the second bonding portion 310 is increased, the pressure applied by the pressure head is concentrated on the conductive particles 500 in the bonding area 311, and the technical problem that the pressure received by the conductive particles 500 in the two side areas and the pressure received by the conductive particles 500 in the middle area have a difference is improved, so that the terminal contact area of the conductive particles 500 in the middle area and the terminal contact area of the conductive particles 500 in the edge area are equal.

[0088] At the same time, on the basis of FIG. 4, the arrangement of the filling portion 312a can reduce the step difference of the first extending portion 320 and the second extending portion 330 in the filling area 312, and improve the surface flatness of the flexible circuit board 300.

[0089] In the present embodiment, the filling portion 312a can be directly bonded to the lowermost single-layer board 400 in the filling area 312 as a separate structure, or the filling portion 312a can be directly arranged as a structure integrated with the first extending portion 320 and the second extending portion 330 in FIG. 6.

[0090] In the display module 100 of the present application, referring to FIGS. 6 and 9, the distance W between the outermost second terminal 310a of the plurality of second terminals 310a and the adjacent boundary of the second bonding portion 310 can be greater than 1.5 mm.

[0091] On the basis of Fig. 6, the present application can also directly remove the single-layer board 400 structure in the filling area 312, which is equivalent to the structure of the second binding portion 310, and the filling portion 312a in the filling area 312 can be a structure integrally provided with the first extending portion 320 and the second extending portion 330.

[0092] Meanwhile, referring to Figs. 2 and 4, the flexible circuit board 300 of the present application further comprises an output portion 340 connected to the side of the second extending portion 330 away from the first extending portion 320, and the output portion 340 is connected to the target signal end.

[0093] The present application also provides a display device comprising the display module. The display device can comprise a mobile phone, a television, a notebook computer, and the like.

[0094] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0095] The above describes the technical solutions provided by the embodiments of the present application in detail. The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above description of the embodiments is only for helping to understand the technical solutions of the present application and the core ideas thereof; those skilled in the art should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for some technical features thereof; and 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, wherein, include: The display panel includes a display section, a first binding section located on one side of the display section, and a wiring section located between the first binding section and the display section. The first binding section is provided with a plurality of first terminals. Flexible circuit boards, including: The second binding part is provided with a plurality of second terminals, and the second terminals are bound and connected to the corresponding first terminals; A first extension portion is connected to the second binding portion. The first extension portion extends from the second binding portion toward the display portion, and the orthographic projection of the first extension portion on the display panel is located within the wiring portion. The second extension is connected to the second binding part, and the second extension extends from the second binding part to a side away from the first extension; In the direction from the first extension to the second extension, the width of the first extension is greater than the width of the second extension, and the width of the second extension is greater than two-thirds the width of the first extension.

2. The display module according to claim 1, wherein, The second binding portion, the first extension portion, and the second extension portion all include single-layer boards, and the number of single-layer boards stacked in the first extension portion and the second extension portion is greater than the number of single-layer boards in the second binding portion.

3. The display module according to claim 2, wherein, The second binding part has one layer of single-layer plates, and the number of single-layer plates in the first extension part is less than or equal to the number of single-layer plates in the second extension part.

4. The display module according to claim 2, wherein, The single-layer plate includes: Insulating substrate; A first conductive layer is disposed on the surface of the insulating substrate near the display panel. A first insulating layer is disposed on the surface of the first conductive layer near the display panel. A second conductive layer is disposed on the surface of the insulating substrate on the side away from the display panel; The second insulating layer is disposed on the surface of the second conductive layer near the display panel.

5. The display module according to claim 1, wherein, The second extension is provided with an adsorption area and a functional area, and the functional area is provided with a functional element; The adsorption region and the functional region are arranged without overlap.

6. The display module according to claim 5, wherein, On the surface of the second extension away from the display panel, the surface roughness of the adsorption area is less than that of the functional area.

7. The display module according to claim 5, wherein, The second extension includes three adsorption regions, two of which are located on both sides of the second extension, and one of which is located in the central region of the second extension.

8. The display module according to claim 5, wherein, The width and length of the adsorption zone both range from 6 mm to 8 mm.

9. The display module according to claim 1, wherein, In a first direction, the length of the second binding portion is less than the length of the first extension portion, and the first direction is perpendicular to the direction from the first extension portion to the second extension portion.

10. The display module according to claim 1, wherein, In a first direction, the length of the second binding portion is equal to the length of both the first extension portion and the second extension portion, and the first direction is perpendicular to the direction from the first extension portion to the second extension portion.

11. The display module according to claim 10, wherein, The second bonding portion includes a bonding area and filling areas disposed on both sides of the bonding area, and a plurality of second terminals are disposed within the bonding area; Each of the filling areas is further provided with a filling part, the sum of the thickness of the filling part and the thickness of the second binding part being equal to the thickness of the first extension part or the thickness of the second extension part.

12. The display module according to claim 11, wherein, The filling portion is integrally formed with the first extension portion and the second extension portion.

13. The display module according to claim 11, wherein, The distance between the outermost second terminal among the plurality of second terminals and the adjacent boundary in the second binding portion is greater than 1.5 mm.

14. The display module according to any one of claims 1 to 13, wherein, The wiring section also includes a driver chip, and the first extension has a first opening on the side facing the display panel, and the driver chip is housed in the first opening.

15. The display module according to claim 14, wherein, The wiring section is provided with multiple alignment marks, and the multiple alignment marks are arranged in a non-overlapping manner with the first extension section.

16. The display module according to any one of claims 1 to 13, wherein, The first extension has two pressing areas, and the two pressing areas are respectively located at both ends of the first extension.

17. The display module according to claim 16, wherein, The width and length of the pressing area both range from 6 mm to 8 mm.

18. The display module according to any one of claims 1 to 13, wherein, The flexible circuit board also includes an output section, which is connected to the side of the second extension away from the first extension.

19. The display module according to any one of claims 1 to 13, wherein, The first terminals on both sides of the first bonding portion are respectively connected to the sensing electrode line and the driving electrode line of the touch layer in the display panel.

20. A display device, wherein, The display device includes a display module as described in any one of claims 1 to 20.

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