Display module and display device

Abstract

Embodiments of the present disclosure provide a display module and a display device, which relate to the technical field of display and are used for reducing the risk of display failure of the display module; the display module comprises a display panel, a plurality of first circuit boards, a second circuit board, a center control board and a plurality of differential signal lines; wherein the plurality of first circuit boards comprise a first sub-circuit board, a second sub-circuit board and a third sub-circuit board; the distances between the first sub-circuit board, the second sub-circuit board and the third sub-circuit board and the center control board increase in turn; the plurality of differential signal lines comprise first differential signal lines, second differential signal lines and third differential signal lines which are arranged at intervals; the first differential signal lines are electrically connected with the first sub-circuit board, the second differential signal lines are electrically connected with the second sub-circuit board, and the third differential signal lines are electrically connected with the third sub-circuit board; and part of the first differential signal lines are located between the second differential signal lines and the third differential signal lines. The display panel is used for displaying images.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a display module and display device. Background Technology

[0002] With the rapid development of display technology, the consumer market's pursuit of display devices has extended from simply high resolution to a smoother dynamic visual experience, making high refresh rate one of the core specifications of display devices.

[0003] However, while increasing the refresh rate improves the smoothness of motion pictures, it also induces a series of display problems. How to reduce the probability of display problems while further increasing the refresh rate of display devices has become an urgent technical problem to be solved. Summary of the Invention

[0004] The purpose of the embodiments of this disclosure is to provide a display module and display device that reduces the probability of display defects while increasing the refresh rate of the display device.

[0005] To achieve the above objectives, the embodiments of this disclosure provide the following technical solutions: On one hand, a display module is provided. The display module includes a display panel, a plurality of first circuit boards, a second circuit board, a central control board, and a plurality of differential signal lines arranged side by side. The display panel includes a display area and a bonding area located on one side of the display area, the bonding area having pins. The plurality of first circuit boards are disposed on one side of the display panel and on the side of the bonding area away from the display area; one end of the first circuit board is electrically connected to the pins. The second circuit board is disposed on the side of the plurality of first circuit boards away from the display panel. The central control board is located on the side of the second circuit board away from the display panel. At least a portion of the differential signal lines are disposed on the second circuit board; one end of the differential signal line is electrically connected to the first circuit board, and the other end is electrically connected to the central control board. The plurality of first circuit boards include a first sub-circuit board, a second sub-circuit board, and a third sub-circuit board spaced apart along a first direction, the first direction intersecting the arrangement direction of the display area and the bonding area; along the first direction, the distance between the first sub-circuit board, the second sub-circuit board, and the third sub-circuit board and the central control board increases sequentially. The plurality of differential signal lines include a first differential signal line, a second differential signal line, and a third differential signal line spaced apart; the first differential signal line is electrically connected to the first sub-circuit board, the second differential signal line is electrically connected to the second sub-circuit board, and the third differential signal line is electrically connected to the third sub-circuit board; a portion of the first differential signal line is located between the second differential signal line and the third differential signal line.

[0006] In the aforementioned display module, the distances between the first, second, and third sub-circuit boards and the central control board increase sequentially. The lengths of the first, second, and third differential signal lines connected to the first, second, and third sub-circuit boards, respectively, also increase sequentially. The facing length between two adjacent differential signal lines is determined by the shorter of the two. A longer facing length results in greater crosstalk between the two differential signal lines, making it more prone to display defects such as noise. By placing the shortest differential signal line between the longer second and third differential signal lines, the significant crosstalk caused by their proximity is avoided. This allows for increasing the rate of differential signals transmitted on the differential signal lines to improve the display module's refresh rate while reducing the risk of display defects.

[0007] In some embodiments, the differential signal line includes a main body portion disposed on the second circuit board; the main body portion extends along the first direction; the main body portion of the first differential signal line is located between the main body portion of the second differential signal line and the main body portion of the third differential signal line.

[0008] In some embodiments, the second circuit board includes a first sub-board and a second sub-board arranged along the first direction; the first sub-board, the second sub-board, and the third sub-board are respectively connected to the first sub-board; the main body of the first differential signal line, the second differential signal line, and the third differential signal line each includes a first sub-part disposed on the first sub-board and a second sub-part disposed on the second sub-board; in one differential signal line, the first sub-part is connected to the central control board through the second sub-part; the first sub-part of the first differential signal line is located between the first sub-part of the second differential signal line and the first sub-part of the third differential signal line; the second sub-part of the first differential signal line is located between the second sub-part of the second differential signal line and the second sub-part of the third differential signal line.

[0009] In some embodiments, the plurality of sub-circuit boards further include a fourth sub-circuit board, a fifth sub-circuit board, and a sixth sub-circuit board spaced apart along a first direction, the fourth sub-circuit board, the fifth sub-circuit board, and the sixth sub-circuit board being respectively connected to the second sub-board; along the first direction, the distances between the fourth sub-circuit board, the fifth sub-circuit board, and the sixth sub-circuit board and the central control board increase sequentially; the differential signal lines further include a fourth differential signal line, a fifth differential signal line, and a sixth differential signal line spaced apart, the fourth differential signal line being electrically connected to the fourth sub-circuit board, the fifth differential signal line being electrically connected to the fifth sub-circuit board, and the sixth differential signal line being electrically connected to the sixth sub-circuit board; along a second direction, the distances between the main body portions of the fourth differential signal line, the fifth differential signal line, and the sixth differential signal line and the main body portions of the first differential signal line increase sequentially; or, along the second direction, the distances between the main body portions of the fifth differential signal line, the fourth differential signal line, and the sixth differential signal line and the main body portions of the first differential signal line increase sequentially; the second direction is perpendicular to the first direction.

[0010] In some embodiments, along the second direction, the main body portions of the fourth, fifth, and sixth differential signal lines are disposed on the side of the second sub-parts of the first, second, and third differential signal lines near the sub-circuit board; or, along the second direction, the main body portions of the fourth, fifth, and sixth differential signal lines are disposed on the side of the second sub-parts of the first, second, and third differential signal lines away from the sub-circuit board.

[0011] In some embodiments, along the second direction, the distances between the main body portion of the second differential signal line, the main body portion of the first differential signal line, and the main body portion of the third differential signal line and the main body portion of the fourth differential signal line increase sequentially; or, along the second direction, the distances between the main body portion of the third differential signal line, the main body portion of the first differential signal line, and the main body portion of the second differential signal line and the main body portion of the fourth differential signal line increase sequentially.

[0012] In some embodiments, the differential signal line further includes a first connection portion disposed on the second circuit board. In one differential signal line, the first connection portion is disposed between the main body and the sub-circuit board electrically connected to the differential signal line. At least a portion of the first connection portion of the first differential signal line and at least a portion of the second differential signal line are arranged at intervals along a third direction.

[0013] In some embodiments, the first connection portion of one of the first differential signal line and the second differential signal line includes a first portion and a second portion; the first portion and the other of the first differential signal line and the second differential signal line are spaced apart along the third direction, and the first portion and the second portion are connected by a via.

[0014] In some embodiments, the second circuit board further includes a first flexible circuit board, one end of which is connected to the first sub-board and the other end of which is connected to the second sub-board; the first differential signal line, the second differential signal line, and the third differential signal line each further include a second connecting portion disposed on the first flexible circuit board, one end of which is connected to the first sub-part of the main body and the other end of which is connected to the second sub-part of the main body; the second connecting portion of the first differential signal line is located between the second connecting portion of the second differential signal line and the second connecting portion of the third differential signal line.

[0015] In some embodiments, the second sub-board further includes a first connector, and the central control board further includes a second connector. The second sub-board and the central control board are connected via the first connector and the second connector. The first differential signal line, the second differential signal line, the third differential signal line, the fourth differential signal line, the fifth differential signal line, and the sixth differential signal line are all electrically connected to the first connector.

[0016] In some embodiments, the central control board further includes a third connector, which is spaced apart from the second connector along the first direction; the plurality of sub-circuit boards further include a seventh sub-circuit board, an eighth sub-circuit board, and a ninth sub-circuit board, which are spaced apart along the first direction, and the distances between the seventh sub-circuit board, the eighth sub-circuit board, and the ninth sub-circuit board and the central control board increase sequentially along the first direction; the plurality of differential signal lines further include a seventh differential signal line, an eighth differential signal line, and a ninth differential signal line electrically connected to the third connector, the seventh differential signal line being electrically connected to the seventh sub-circuit board, the eighth differential signal line being electrically connected to the eighth sub-circuit board, and the ninth differential signal line being electrically connected to the ninth sub-circuit board; a portion of the seventh differential signal line is located between the eighth differential signal line and the ninth differential signal line.

[0017] In some embodiments, the main body of the seventh differential signal line is located between the main body of the eighth differential signal line and the main body of the ninth differential signal line.

[0018] In some embodiments, the second circuit board further includes a third sub-board and a fourth sub-board arranged along the first direction; the seventh sub-board, the eighth sub-board, and the ninth sub-board are respectively connected to the third sub-board; the main body of the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line each includes a first sub-part disposed on the third sub-board and a second sub-part disposed on the fourth sub-board, and in one differential signal line, the first sub-part is connected to the central control board through the second sub-part; the first sub-part of the seventh differential signal line is located between the first sub-part of the eighth differential signal line and the first sub-part of the ninth differential signal line; the second sub-part of the seventh differential signal line is located between the second sub-part of the eighth differential signal line and the second sub-part of the ninth differential signal line.

[0019] In some embodiments, the plurality of sub-circuit boards further include a tenth sub-circuit board, an eleventh sub-circuit board, and a twelfth sub-circuit board spaced apart along a first direction, the tenth sub-circuit board, the eleventh sub-circuit board, and the twelfth sub-circuit board being electrically connected to the fourth sub-board respectively; along the first direction, the distances between the tenth sub-circuit board, the eleventh sub-circuit board, and the twelfth sub-circuit board and the central control board increase sequentially; the differential signal lines further include a tenth differential signal line, an eleventh differential signal line, and a twelfth differential signal line spaced apart, the tenth differential signal line being connected to the tenth sub-circuit board. The circuit boards are electrically connected, with the eleventh differential signal line electrically connected to the eleventh sub-circuit board and the twelfth differential signal line electrically connected to the twelfth sub-circuit board; along the second direction, the distances between the main body portion of the tenth differential signal line, the main body portion of the eleventh differential signal line, and the main body portion of the twelfth differential signal line and the main body portion of the seventh differential signal line increase sequentially; or, along the second direction, the distances between the main body portion of the eleventh differential signal line, the main body portion of the tenth differential signal line, and the main body portion of the twelfth differential signal line and the main body portion of the seventh differential signal line increase sequentially.

[0020] In some embodiments, along the second direction, the main body portions of the tenth differential signal line, the eleventh differential signal line, and the twelfth differential signal line are disposed on the side of the second sub-parts of the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line near the sub-circuit board; or, along the second direction, the main body portions of the tenth differential signal line, the eleventh differential signal line, and the twelfth differential signal line are disposed on the side of the second sub-parts of the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line away from the sub-circuit board.

[0021] In some embodiments, along the second direction, the distances between the main body portion of the eighth differential signal line, the main body portion of the seventh differential signal line, and the main body portion of the ninth differential signal line and the main body portion of the tenth differential signal line increase sequentially; or, along the second direction, the distances between the main body portion of the ninth differential signal line, the main body portion of the seventh differential signal line, and the main body portion of the eighth differential signal line and the main body portion of the tenth differential signal line increase sequentially.

[0022] In some embodiments, at least a portion of the first connection of the seventh differential signal line and at least a portion of the eighth differential signal line are arranged at intervals along a third direction.

[0023] In some embodiments, the first connection portion of one of the seventh differential signal line and the eighth differential signal line includes a first portion and a second portion; the first portion and the other of the seventh differential signal line and the eighth differential signal line are spaced apart along the third direction, and the first portion and the second portion are connected by a via.

[0024] In some embodiments, the second circuit board further includes a second flexible circuit board, one end of which is connected to the third sub-board and the other end of which is connected to the fourth sub-board; the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line each further include a second connecting portion disposed on the second flexible circuit board, one end of which is connected to the first sub-part of the main body and the other end of which is connected to the second sub-part of the main body; the second connecting portion of the seventh differential signal line is located between the second connecting portions of the eighth differential signal line and the second connecting portions of the ninth differential signal line.

[0025] In some embodiments, the fourth circuit board further includes a fourth connector, and the fourth circuit board and the central control board are connected through the third connector and the fourth connector; the seventh differential signal line, the eighth differential signal line, the ninth differential signal line, the tenth differential signal line, the eleventh differential signal line and the twelfth differential signal line are all electrically connected to the fourth connector.

[0026] On the other hand, a display device is provided. The display device includes a display module as described in any of the above embodiments.

[0027] The above-described display device has the same structure and beneficial technical effects as the display module provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0029] Figure 1 This is a structural diagram of a display device according to some embodiments; Figure 2 for Figure 1 Cross-sectional view of the display device at AA'; Figure 3 This is a topology diagram of a display module according to some embodiments; Figure 4 This is a partial structural diagram of a display module according to some embodiments; Figure 5 This is a partial wiring diagram of a second circuit board according to some embodiments; Figure 6 This is a routing diagram of differential signal lines on a second circuit board according to some embodiments; Figure 7 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 8 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 9 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 10 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 11 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 12 This is a partial wiring diagram of a second circuit board according to some other embodiments; Figure 13 This is a schematic diagram showing the connection between the second circuit board and the central control board according to some embodiments; Figure 14 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 15 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 16 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 17 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 18 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 19 This is a routing diagram of the differential signal lines on a second circuit board according to some other embodiments; Figure 20 This is a partial wiring diagram of a second circuit board according to some other embodiments. Detailed Implementation

[0030] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0031] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," or "some examples" are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0032] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0033] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a mechanical connection or an electrical connection; it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art will understand the specific meaning of the above terms herein based on the specific circumstances.

[0034] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0035] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable deviation range, which is determined by those skilled in the art taking into account the measurement under discussion and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0036] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0037] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0038] like Figure 1 As shown, some embodiments of this disclosure provide a display device 1000, which can be any device that displays text or images, whether in motion (e.g., video) or still (e.g., image).

[0039] For example, see Figure 1The display device 1000 can be any product or component with a display function, such as a television, laptop, tablet, mobile phone, personal digital assistant (PDA), navigator, in-vehicle display, flight display, wearable device, virtual reality (VR) device, signboard, electronic billboard, shopping mall display, and medical display. For example, the display device 1000 can be... Figure 1 The television set shown.

[0040] From the shape of the display device 1000, the display device 1000 can be rectangular, circular, or elliptical, etc., and the embodiments disclosed herein do not specifically limit it. Here, "rectangle" includes not only standard rectangles but also rounded rectangles.

[0041] The following uses a rectangular display device 1000 as an example to illustrate some embodiments of the present disclosure. However, the implementation of the present disclosure is not limited to this, and other display devices 1000 can also be considered, as long as the same technical concept is applied.

[0042] In some embodiments, the display device 1000 includes a display module 100 and a housing 200, with the display module 100 disposed within the housing 200. The housing 200 may include a frame 210, the longitudinal section of which is, for example, U-shaped, and the display module 100 may be disposed within the frame 210. Furthermore, the housing 200 may also include a front frame (…). Figure 2 (Not shown in the diagram), the front frame is connected to the frame 210, and the display module 100 is located within the space enclosed by the front frame and the frame 210.

[0043] For example, such as Figure 2 As shown, the housing 200 only includes the frame 210, that is, the display device 1000 does not include the front frame. The width of the bezel of the display device 1000 does not need to take into account the thickness of the front frame, which is beneficial to the narrow bezel design of the display device 1000. However, the embodiments disclosed herein are not limited to this.

[0044] Please continue reading. Figure 2 The display module 100 includes a display panel 10 and a cover plate 20. The display panel 10 may include, for example, a display side 10A and a non-display side 10B disposed opposite to each other. The display side 10A refers to the side of the display panel 10 where the image is displayed, and the non-display side 10B refers to the other side opposite to the display side 10A. The display panel 10 is disposed within a frame 210, and the cover plate 20 is disposed on the display side 10A of the display panel 10 and located at the opening of the frame 210.

[0045] Please continue reading. Figure 2The display module 100 may further include a backlight module 30, which is disposed on the non-display side 10B of the display panel 10 and is used to provide a light source for the display panel 10. The display panel 10 can adjust the amount of light passing through it to display different gray levels, thereby achieving the purpose of image display.

[0046] like Figure 3 As shown, the display module 100 may further include a central control board 40, which is connected to the display panel 10 and is used to transmit control signals to the display panel 10 to drive the display panel 10 to display images. For example, continue reading... Figure 3 The central control board 40 can be connected to the display panel 10, for example, via the second circuit board 50 and the first circuit board 60. The central control board 40 may include, for example, a timing controller (TCON), a power management chip (DC / DC), and a drive circuit such as an adjustable resistor voltage divider circuit (generating Vcom). Of course, the central control board 40 may also include other circuit structures, which will not be listed here.

[0047] In addition, please continue to refer to Figure 3 The display panel 10 includes a display area 101 and a bonding area 102 located on one side of the display area 101. The bonding area 102 is provided with pins 1021. As the size of the display device 1000 increases, such as Figure 4 As shown, in order to alleviate the problem of insufficient driving capability of the single central control board 40, multiple first circuit boards 60 are arranged on the side of the binding area 102 away from the display area 101. The multiple first circuit boards 60 share the driving signal output by the central control board 40, which is beneficial to the display stability of the display module 100.

[0048] Continue reading Figure 3 The display module 10 may include 12 first circuit boards 60, wherein integrated circuits (ICs) are bonded to the first circuit boards 60; the display module 10 also includes 4 second circuit boards 50, wherein every 3 first circuit boards 60 are electrically connected to one second circuit board 50. The number of the first circuit boards 60 and the second circuit boards 50 described above is only an example, and this disclosure does not specifically limit the number of them.

[0049] As an example, the first circuit board 60 can be a flexible printed circuit (FPC) or an IC bonded to an FPC, such as a chip-on-film (COF); the first circuit board 60 can also be chip-on-glass, but this disclosure does not specifically limit it.

[0050] Wherein, when the first circuit board 60 is an FPC or COF, such as Figure 2 As shown, the central control board 40 can be folded to the side of the backlight module 30 away from the display panel 10. Thus, the central control board 40 does not need to occupy the circumferential space of the display panel 10, which is beneficial to the narrow bezel of the display device 1000.

[0051] Please continue reading. Figure 2 The display panel 10 may include an array substrate 11 and a color filter substrate 12 disposed opposite to each other, and a liquid crystal layer 13 disposed between the array substrate 11 and the color filter substrate 12. The array substrate 11 and the color filter substrate 12 are bonded together by an adhesive 14, thereby confining the liquid crystal layer 13 within the area enclosed by the adhesive 14. The color filter substrate 12 may also be referred to as an opposing substrate or an encapsulation substrate. The color filter substrate 12 can filter the light incident on it to emit light of various colors (such as red, green, or blue) to achieve color display.

[0052] like Figure 4 As shown, the second circuit board 50 is disposed on the side of the plurality of first circuit boards 60 away from the display panel 10. The display module 100 also includes a plurality of differential signal lines 70, at least a portion of which are disposed on the second circuit board 50. One end of the differential signal line 70 is electrically connected to the first circuit board 60, and the other end is electrically connected to the central control board 40. By increasing the rate at which differential signals are transmitted on the differential signal lines 70, the refresh rate of the display panel 10 can be increased.

[0053] As an example, one end of the differential signal line 70 can be electrically connected to a pin of the first circuit board 60, and the other end can be electrically connected to a connector located on the second circuit board 50. The central control board 40 includes another connector that is electrically connected to the connector on the second circuit board 50. The differential signal line 70 is electrically connected through the connector located on the second circuit board 50 and the connector located on the central control board, respectively.

[0054] As an example, such as Figure 5 As shown, the differential signal line 70 includes a first differential signal sub-line 701 and a second differential signal sub-line 702. The first differential signal sub-line 701 and the second differential signal sub-line 702 constitute a differential pair. For ease of description, the differential pair formed by the first differential signal sub-line 701 and the second differential signal sub-line 702 will be referred to as the differential signal line 70.

[0055] The signal-to-noise ratio (SNR) of the differential signal transmitted on the differential signal line 70 directly affects the display quality of the display panel 10. When the SNR of the differential signal is too low, the display panel 10 is prone to display noise with poor eye diagrams. As the distance between the first circuit board and the central control board increases, the length of the differential signal line electrically connected to the first circuit board also increases. The loss of the differential signal is greater when transmitted on a longer differential signal line, resulting in a lower SNR. Furthermore, the facing length between two adjacent differential signal lines is determined by the shorter of the two. The longer the facing length between two adjacent differential signal lines, the greater the crosstalk between them, further reducing the SNR of the differential signal transmitted on that differential signal line. When the rate of the differential signal on that differential signal line is increased to improve the refresh rate, the aforementioned differential signal with a poor SNR is more likely to cause display defects such as noise in the corresponding display panel area. However, due to the size limitations of the display device, the length of the differential signal line is difficult to adjust. Therefore, the SNR of the differential signal on a longer differential signal line becomes the main bottleneck restricting the improvement of the refresh rate of the display device.

[0056] To alleviate the aforementioned technical problems, related technologies typically employ methods such as increasing the width of the circuit board to improve the distance between two adjacent differential signal lines, or adding shielding lines between two adjacent differential signal lines to reduce crosstalk between them; alternatively, using low-loss materials to fabricate the circuit board to reduce differential signal loss; or adding an intermediate control board to amplify the differential signal output from the central control board before sending it to the flip-chip film, thereby reducing the transmission distance of the differential signal and thus reducing differential signal loss.

[0057] However, in the industry, the spacing between two adjacent differential signal lines is 3 or 4 times the line width of the differential signal line. To effectively reduce crosstalk between differential signal lines, the spacing between two adjacent differential signal lines needs to be increased to more than 10 times the line width of the differential signal line. This greatly increases the area of ​​the circuit board and the cost of the display device. Adding shielding lines, using low-loss materials, or adding intermediate control boards will also increase the cost of the display device.

[0058] This disclosure provides a display module 100 that solves the problem of reducing the probability of display defects while increasing the refresh rate of the display device at a low cost.

[0059] like Figure 3 As shown, in a display module 100 provided in this embodiment, a plurality of first circuit boards 60 include a first sub-circuit board 61, a second sub-circuit board 62, and a third sub-circuit board 63 spaced apart along a first direction X. The first direction X intersects the arrangement direction of the display area 101 and the bonding area 102. Along the first direction X, the distances between the first sub-circuit board 61, the second sub-circuit board 62, and the third sub-circuit board 63 and the central control board 40 increase sequentially. Figure 6As shown, the multiple differential signal lines 70 include a first differential signal line 71, a second differential signal line 72, and a third differential signal line 73 spaced apart. The first differential signal line 71 is electrically connected to the first sub-circuit board 61, the second differential signal line 72 is electrically connected to the second sub-circuit board 62, and the third differential signal line 73 is electrically connected to the third sub-circuit board 63; continue reading Figure 6 or Figure 7 A portion of the first differential signal line 71 is located between the second differential signal line 72 and the third differential signal line 73. (Reference) Figure 3 The first sub-circuit board 61, the second sub-circuit board 62, and the third sub-circuit board 63 are electrically connected to the same second circuit board 50 (i.e., the first sub-circuit board 51). The display panel 10 also includes a non-display area located around the display area 101. The non-display area of ​​the display panel 10 includes a gate driving circuit (not shown in the figure). The gate driving circuit is electrically connected to the gate lines located in the display area 101 and is used to provide scanning signals to the gate lines of the display area 101. The third sub-circuit board 63 is closer to the gate driving circuit than the second sub-circuit board 62. Optionally, gate driving circuits are provided on both the left and right sides of the display panel 10. The gate driving circuit on the left side is closer to the third sub-circuit board 63. The three circuit boards (61, 62, and 63) are symmetrically distributed about the center line PQ in the vertical direction of the display panel 10. Figure 3 The differential signal line design on the seventh sub-circuit board 67, the eighth sub-circuit board 68, and the ninth sub-circuit board 69 can refer to the differential line design of the first sub-circuit board 61, the second sub-circuit board 62, and the third sub-circuit board 63, and will not be repeated here.

[0060] In the aforementioned display module 100, the distance between the first sub-circuit board 61 and the central control board 40 is less than the distance between the second sub-circuit board 62 and the central control board 40 and less than the distance between the third sub-circuit board 63 and the central control board 40; correspondingly, the length of the first differential signal line 71 is less than the length of the second differential signal line 72 and less than the length of the third differential signal line. By placing the shortest first differential signal line 71 between the longer second differential signal line 72 and third differential signal line 73, the problem of low differential signal-to-noise ratio on the second differential signal line 72, which is located between the first differential signal line 71 and the third differential signal line 73 and is simultaneously subjected to crosstalk from both the first and third differential signal lines 71 and 73, is alleviated. At the same time, although the first differential signal line 71 is subjected to crosstalk from both the second and third differential signal lines 72 and 73, its shorter length results in less differential signal loss, thus maintaining a relatively high differential signal-to-noise ratio. Therefore, in the above-mentioned display module 100, the differential signals transmitted on the first differential signal line 71, the second differential signal line 72 and the third differential signal line 73 all have a good signal-to-noise ratio. While increasing the rate of the differential signal to improve the refresh rate of the display module 100, the risk of display defects in the display module 100 is reduced.

[0061] In some possible implementations, such as Figure 7 As shown, the differential signal line 70 includes a main body portion 70A disposed on the second circuit board 50, and the main body portion 70A extends along the first direction X; the main body portion 71A of the first differential signal line 71 is located between the main body portion 72A of the second differential signal line 72 and the main body portion 73A of the third differential signal line 73.

[0062] The length of the differential signal line 70 is mainly determined by the main body portion 70A. The length of the main body portion 71A of the first differential signal line 71 is shorter than the length of the main body portion 72A of the second differential signal line 72 and shorter than the length of the main body portion 73A of the third differential signal line 73. By placing the shortest main body portion 71A of the first differential signal line 71 between the longer main body portions 72A of the second differential signal line 72 and 73A of the third differential signal line 73, the crosstalk caused by the main body portion 72A of the second differential signal line 72 being located between the main body portions 71A of the first differential signal line 71 and 73A of the third differential signal line 73 is mitigated. The second differential signal line 72 has a low differential signal-to-noise ratio. At the same time, although the main body 71A of the first differential signal line 71 is subjected to crosstalk from both the main body 72A of the second differential signal line 72 and the main body 73A of the third differential signal line 73, the differential signal loss on the first differential signal line 71 is small due to the shorter length of the main body 71A. Therefore, the differential signal-to-noise ratio on the first differential signal line 71 can still maintain a high level.

[0063] In some examples, the arrangement of the main body 71A of the first differential signal line 71, the main body 72A of the second differential signal line 72, and the main body 73A of the third differential signal line 73 can be as follows: Figure 6 As shown, along the direction away from the first circuit board 60, the main body portion 73A of the third differential signal line 73, the main body portion 71A of the first differential signal line 71, and the main body portion 72A of the second differential signal line 72 are arranged sequentially; or, as... Figure 7 As shown, along the direction away from the first circuit board 60, the main body portion 72A of the second differential signal line 72, the main body portion 71A of the first differential signal line 71, and the main body portion 73A of the third differential signal line 73 are arranged in sequence.

[0064] In some possible implementations, such as Figure 8 As shown, the second circuit board 50 includes a first sub-board 51 and a second sub-board 52 arranged along the first direction X; the first sub-board 61, the second sub-board 62 and the third sub-board 63 are respectively connected to the first sub-board 51; the main body 70A of the first differential signal line 71, the second differential signal line 72 and the third differential signal line 73 each includes a first sub-part 70A1 disposed on the first sub-board 51 and a second sub-part 70A2 disposed on the second sub-board 52. In a differential signal line 70, the first sub-part 70A1 is connected to the central control board 40 through the second sub-part 70A2. Figure 8(Not shown in the image) Connection; the first sub-part 71A1 of the first differential signal line 71 is located between the first sub-part 72A1 of the second differential signal line 72 and the third differential signal line 73A1; the second sub-part 71A2 of the first differential signal line 71 is located between the second sub-part 72A2 of the second differential signal line 72 and the third differential signal line 73A2.

[0065] In some examples, to avoid the second circuit board 50 becoming too long and having poor mechanical properties, making it susceptible to breakage and circuit failure during transportation or assembly due to external forces, the second circuit board 50 is split into independently set first sub-board 51 and second sub-board 52. The first sub-board 51 and second sub-board 52 are relatively short, have better mechanical properties, and are less prone to breakage under the same external forces. Meanwhile, the main body 70A of the first differential signal line 71, the second differential signal line 72, and the third differential signal line 73 includes a first sub-part 70A1 disposed on the first sub-board 51 and a second sub-part 70A2 disposed on the second sub-board 52. On the first sub-board 51, the first sub-part 71A1 of the first differential signal line 71 is located between the first sub-part 72A1 of the second differential signal line 72 and the third differential signal line 73A1. On the second sub-board 52, the second sub-part 71A2 of the first differential signal line 71 is located between the second sub-part 72A2 of the second differential signal line 72 and the third differential signal line 73A2. This ensures that on both the first and second sub-boards 51 and 52, the first differential signal line 71 is located between the second differential signal line 72 and the third differential signal line 73, thereby reducing crosstalk on the second differential signal line 72 and the third differential signal line 73.

[0066] In some possible implementations, such as Figure 9 As shown, the second circuit board 50 also includes a first flexible second circuit board 50A, one end of which is connected to the first sub-board 51 and the other end of which is connected to the second sub-board 52; the first differential signal line 71, the second differential signal line 72 and the third differential signal line 73 each also include a second connecting portion 70B disposed on the first flexible second circuit board 50A, one end of which is connected to the first sub-part 70A1 of the main body 70A and the other end of which is connected to the second sub-part 70A2 of the main body 70A; the second connecting portion 71B of the first differential signal line 71 is located between the second connecting portion 72B of the second differential signal line 72 and the second connecting portion 73B of the third differential signal line 73.

[0067] In some examples, the rigid circuit boards that are separately configured can be connected by flexible printed circuit boards (FPCs). FPCs use polyimide or polyester film as a substrate, embedding circuit designs on a flexible substrate, thus exhibiting high wiring density, light weight, and good bendability. In some embodiments of this disclosure, a first flexible second circuit board 50A is used to connect the first sub-board 51 and the second sub-board 52, improving the second circuit board 50's resistance to external damage. Simultaneously, the second connection portion 71B of the first differential signal line 71 on the first flexible second circuit board 50A is located between the second connection portion 72B of the second differential signal line 72 on the first flexible second circuit board 50A and the second connection portion 73B of the third differential signal line 73 on the first flexible second circuit board 50A. This ensures that on the first flexible second circuit board 50A, the first differential signal line 71 is located between the second differential signal line 72 and the third differential signal line 73, thereby reducing crosstalk on the second differential signal line 72 and the third differential signal line 73.

[0068] In some possible implementations, combined Figure 3 ,like Figure 8 and Figure 9 As shown, the plurality of first circuit boards 60 also include a fourth sub-circuit board 64, a fifth sub-circuit board 65, and a sixth sub-circuit board 66 spaced apart along a first direction X. The fourth sub-circuit board 64, the fifth sub-circuit board 65, and the sixth sub-circuit board 66 are respectively connected to the second sub-board 52. Along the first direction X, the distances between the fourth sub-circuit board 64, the fifth sub-circuit board 65, and the sixth sub-circuit board 66 and the central control board 40 increase sequentially. The differential signal lines 70 also include a fourth differential signal line 74, a fifth differential signal line 75, and a sixth differential signal line 76 spaced apart. The fourth differential signal line 74 is electrically connected to the fourth sub-circuit board 64, the fifth differential signal line 75 is electrically connected to the fifth sub-circuit board 65, and the sixth differential signal line 76 is electrically connected to the sixth sub-circuit board 66. Figure 8 As shown, along the second direction Y, the distances between the main body portion 74A of the fourth differential signal line 74, the main body portion 75A of the fifth differential signal line 75, and the main body portion 76A of the sixth differential signal line 76 and the main body portion 71A of the first differential signal line 71 increase sequentially; or, as... Figure 9 As shown, along the second direction Y, the distances between the main body portion 75A of the fifth differential signal line 75, the main body portion 74A of the fourth differential signal line 74, and the main body portion 76A of the sixth differential signal line 76 and the main body portion 71A of the first differential signal line 71 increase sequentially. The second direction Y is perpendicular to the first direction X.

[0069] The second sub-board 52 also includes a fourth differential signal line 74, a fifth differential signal line 75, and a sixth differential signal line 76, which are electrically connected to the fourth sub-board 64, the fifth sub-board 65, and the sixth sub-board 66, respectively. As the distance between the fourth sub-board 64, the fifth sub-board 65, and the sixth sub-board 66 and the central control board 40 increases sequentially, the lengths of the fourth differential signal line 74, the fifth differential signal line 75, and the sixth differential signal line 76 also increase sequentially. By placing the fourth differential signal line 74 or the fifth differential signal line 75 adjacent to the second differential signal line 72 or the third differential signal line 73, respectively, since the fourth differential signal line 74 and the fifth differential signal line 75 are shorter, they can each exert less crosstalk on the second differential signal line 72 or the third differential signal line 73 than the sixth differential signal line 76, thereby improving the signal-to-noise ratio of the differential signals transmitted on the second differential signal line 72 or the third differential signal line 73.

[0070] By adopting the above configuration, the second differential signal line 72 or the third differential signal line 73 is only subject to crosstalk from the fourth differential signal line 74 or the fifth differential signal line 75, rather than the crosstalk from the sixth differential signal line 76, thereby reducing the crosstalk of the differential signals on the second differential signal line 72 or the third differential signal line 73.

[0071] In some possible implementations, such as Figure 8 As shown, along the second direction Y, the main body portion 74A of the fourth differential signal line 74, the main body portion 75A of the fifth differential signal line 75, and the main body portion 76A of the sixth differential signal line 76 are disposed on the side away from the first circuit board 60 of the second sub-part 71A2 of the first differential signal line 71, the second sub-part 72A2 of the second differential signal line 72, and the second sub-part 73A2 of the third differential signal line 73; or, as Figure 9 As shown, along the second direction Y, the main body portion 74A of the fourth differential signal line 74, the main body portion 75A of the fifth differential signal line 75, and the main body portion 76A of the sixth differential signal line 76 are disposed on the side of the second sub-part 71A2 of the first differential signal line 71, the second sub-part 72A2 of the second differential signal line 72, and the second sub-part 73A2 of the third differential signal line 73 near the first circuit board 60.

[0072] As an example, the arrangement of the main body 70A of the multiple differential signal lines 70 on the second daughterboard 52 can be as follows: Figure 8As shown, along the second direction Y and away from the first circuit board 60, the main body portion 73A of the third differential signal line 73, the main body portion 71A of the first differential signal line 71, the main body portion 72A of the second differential signal line 72, the main body portion 74A of the fourth differential signal line 74, the main body portion 75A of the fifth differential signal line 75, and the main body portion 76A of the sixth differential signal line 76 are arranged sequentially; alternatively, as shown... Figure 9 As shown, along the second direction Y and away from the first circuit board 60, the main body portion 74A of the fourth differential signal line 74, the main body portion 76A of the sixth differential signal line 76, the main body portion 75A of the fifth differential signal line 75, the main body portion 72A of the second differential signal line 72, the main body portion 71A of the first differential signal line 71, and the main body portion 73A of the third differential signal line 73 are arranged sequentially; it can also be, as... Figure 10 As shown, along the second direction Y and away from the first circuit board 60, the main body portion 72A of the second differential signal line 72, the main body portion 71A of the first differential signal line 71, the main body portion 73A of the third differential signal line 73, the main body portion 74A of the fourth differential signal line 74, the main body portion 75A of the fifth differential signal line 75, and the main body portion 76A of the sixth differential signal line 76 are arranged sequentially; it can also be, as... Figure 11 As shown, along the second direction Y and away from the first circuit board 60, the main body portion 74A of the fourth differential signal line 74, the main body portion 76A of the sixth differential signal line 76, the main body portion 75A of the fifth differential signal line 75, the main body portion 73A of the third differential signal line 73, the main body portion 71A of the first differential signal line 71, and the main body portion 72A of the second differential signal line 72 are arranged sequentially. In this arrangement, the positions of the main body portion 74A of the fourth differential signal line 74 and the main body portion 75A of the fifth differential signal line 75 can be interchanged, and the positions of the main body portion 71A of the first differential signal line 71 and the main body portion 72A of the second differential signal line 72 can also be interchanged.

[0073] In some possible implementations, such as Figure 10 As shown, along the second direction Y, the distances between the main body portion 72A of the second differential signal line 72, the main body portion 71A of the first differential signal line 71, the main body portion 73A of the third differential signal line 73, and the main body portion 74A of the fourth differential signal line 74 increase sequentially; or, as... Figure 11 As shown, along the second direction Y, the distances between the main body portion 73A of the third differential signal line 73, the main body portion 71A of the first differential signal line 71, the main body portion 72A of the second differential signal line 72, and the main body portion 74A of the fourth differential signal line 74 increase sequentially.

[0074] As an example, the relative positions of the main body portions 70A of the differential signal lines 70 can be determined based on the signal-to-noise ratio (SNR) of the differential signals transmitted on the second differential signal line 72 and the third differential signal line 73. That is, if the SNR of the differential signal transmitted on the second differential signal line 72 is worse than the SNR of the differential signal transmitted on the third differential signal line 73, then the main body portion 72A of the second differential signal line 72 is placed on the side of the main body portion 71A of the first differential signal line 71 away from the main body portions 70A of the other differential signal lines 70; if the SNR of the differential signal transmitted on the second differential signal line 72 is better than the SNR of the differential signal transmitted on the third differential signal line 73, then the main body portion 73A of the third differential signal line 73 is placed on the side of the main body portion 71A of the first differential signal line 71 away from the main body portions 70A of the other differential signal lines 70.

[0075] In some possible implementations, such as Figure 7 As shown, the differential signal line 70 also includes a first connection portion 70C disposed on the second circuit board 50. In a differential signal line 70, the first connection portion 70C is disposed between the main body portion 70A and the first circuit board 60 electrically connected to the differential signal line 70. At least a portion of the first connection portion 71C of the first differential signal line 71 and at least a portion of the second differential signal line 72 are arranged at intervals along a third direction Z, where the third direction Z is the thickness direction of the second circuit board 50.

[0076] Using the above configuration, the main body 71A of the first differential signal line 71 is located on the side of the main body 72A of the second differential signal line 72 that is away from the first circuit board 60, and because the first sub-circuit board 61 is located on the second sub-circuit board 62 that is away from the central control board 40 ( Figure 7 On one side (not shown), when the main body 71A of the first differential signal line 71 is connected to the first sub-circuit board 61, the first connecting portion 71C of the first differential signal line 71 will cross with the second differential signal line 72. For example, the first connecting portion 71C of the first differential signal line 71 may cross with the main body 72A of the second differential signal line 72, or the first connecting portion 71C of the first differential signal line 71 may cross with the first connecting portion 72C of the second differential signal line 72. To avoid the crossing affecting the normal differential signal transmission, the portions of the two at the crossing position are spaced apart in the third direction Z, thereby ensuring the normal transmission of the differential signals transmitted on the first differential signal line 71 and the second differential signal line 72 respectively.

[0077] In some possible implementations, such as Figure 12As shown, the first connection portion 71C of the first differential signal line 71 intersects with the first connection portion 72C of the second differential signal line 72. One of the first connection portion 71C of the first differential signal line 71 and the first connection portion 72C of the second differential signal line 72 includes a first portion 70D and a second portion 70E. The first portion 70E and the other of the first differential signal line 71 and the second differential signal line 72 are arranged at intervals along the third direction Z. The first portion 70D and the second portion 70E are connected through a via.

[0078] As an example, such as Figure 12 As shown, the first differential signal line 71 includes a first portion 70D and a second portion 70E. The first portion 70D is part of the first connection portion 71C of the first differential signal line 71. The first connection portion 71C of the first differential signal line 71 intersects with the first connection portion 72C of the second differential signal line 72. The first portion 70D and the first connection portion 72C of the second differential signal line 72 are arranged at intervals along the third direction Z. The first portion 70D and the second portion 70E are connected through vias.

[0079] In some possible implementations, such as Figure 13 As shown, the second sub-board 52 further includes a first connector 521, and the central control board 40 further includes a second connector 401. The second sub-board 52 and the central control board 40 are connected via the first connector 521 and the second connector 401. The first differential signal line 71, the second differential signal line 72, the third differential signal line 73, the fourth differential signal line 74, the fifth differential signal line 75, and the sixth differential signal line 76 are all electrically connected to the first connector 521.

[0080] As an example, the first differential signal line 71, the second differential signal line 72, the third differential signal line 73, the fourth differential signal line 74, the fifth differential signal line 75, and the sixth differential signal line 76 can be electrically connected to the central control board 40 through the first connector 521 and the second connector 401 to transmit differential signals from the central control board 40.

[0081] In some possible implementations, such as Figure 13 As shown, the central control board 40 also includes a third connector 402, which is spaced apart from the second connector 401 along the first direction X; as Figure 14 As shown, the plurality of first circuit boards 60 further include a seventh sub-circuit board 67, an eighth sub-circuit board 68, and a ninth sub-circuit board 69 spaced apart along a first direction X. Along the first direction X, the seventh sub-circuit board 67, the eighth sub-circuit board 68, and the ninth sub-circuit board 69 are connected to the central control board 40. Figure 14 The distances between (not shown in the image) increase sequentially. (Continue reading...) Figure 13The multiple differential signal lines 70 also include a seventh differential signal line 77, an eighth differential signal line 78, and a ninth differential signal line 79, which are electrically connected to the third connector 402; see further. Figure 14 The seventh differential signal line 77 is electrically connected to the seventh sub-circuit board 67, the eighth differential signal line 78 is electrically connected to the eighth sub-circuit board 68, and the ninth differential signal line 79 is electrically connected to the ninth sub-circuit board 69; part of the seventh differential signal line 77 is located between the eighth differential signal line 78 and the ninth differential signal line 79.

[0082] The seventh differential signal line 77, the eighth differential signal line 78, and the ninth differential signal line 79 are electrically connected to the central control board 40 through the third connector 402, which can reduce the risk of unstable operation of the display module 100 due to excessive differential signals carried on the first connector 521 and the second connector 401, and improve the reliability of the display module 100 in long-term operation.

[0083] In some possible implementations, such as Figure 15 As shown, the main body 77A of the seventh differential signal line 77 is located between the main body 78A of the eighth differential signal line 78 and the main body 79A of the ninth differential signal line 79.

[0084] In some possible implementations, such as Figure 16 As shown, the circuit board also includes a third sub-board 53 and a fourth sub-board 54 arranged along the first direction X; a seventh sub-board 67, an eighth sub-board 68, and a ninth sub-board 69 are respectively connected to the third sub-board 53; the main body 70A of the seventh differential signal line 77, the eighth differential signal line 78, and the ninth differential signal line 79 each includes a first sub-part 70A1 disposed on the third sub-board 53 and a second sub-part 70A2 disposed on the fourth sub-board 54. In a differential signal line 70, the first sub-part 70A1 is connected to the central control board 40 through the second sub-part 70A2; the first sub-part 77A1 of the seventh differential signal line 77 is located between the first sub-part 78A1 of the eighth differential signal line 78 and the first sub-part 79A1 of the ninth differential signal line 79; the second sub-part 77A2 of the seventh differential signal line 77 is located between the second sub-part 78A2 of the eighth differential signal line 78 and the second sub-part 79A2 of the ninth differential signal line 79.

[0085] For some possible implementations, please refer to [link / reference]. Figure 16The plurality of first circuit boards 60 further include a tenth sub-circuit board 610, an eleventh sub-circuit board 611, and a twelfth sub-circuit board 612 spaced apart along a first direction X. The tenth sub-circuit board 610, the eleventh sub-circuit board 611, and the twelfth sub-circuit board 612 are electrically connected to the fourth sub-board 54 respectively. Along the first direction X, the distances between the tenth sub-circuit board 610, the eleventh sub-circuit board 611, and the twelfth sub-circuit board 612 and the central control board 40 increase sequentially. The differential signal line 70 further includes a tenth differential signal line 710, an eleventh differential signal line 711, and a twelfth differential signal line 712 spaced apart. The tenth differential signal line 710 is electrically connected to the tenth sub-circuit board 610, the eleventh sub-circuit board 611, and the twelfth sub-circuit board 612 are electrically connected to the fourth sub-board 54 respectively. Differential signal line 711 is electrically connected to the eleventh sub-circuit board 611, and twelfth differential signal line 712 is electrically connected to the twelfth sub-circuit board 612; along the second direction Y, the distance between the main body portion 710A of the tenth differential signal line 710, the main body portion 711A of the eleventh differential signal line 711, and the main body portion 712A of the twelfth differential signal line 712 and the main body portion 77A of the seventh differential signal line 77 increases sequentially; or, along the second direction Y, the distance between the main body portion 711A of the eleventh differential signal line 711, the main body portion 710A of the tenth differential signal line 710, and the main body portion 712A of the twelfth differential signal line 712 and the main body portion 77A of the seventh differential signal line 77 increases sequentially.

[0086] For some possible implementations, please refer to [link / reference]. Figure 16 The main body 70A of the tenth differential signal line 710, the eleventh differential signal line 711, and the twelfth differential signal line 712 is disposed on the fourth sub-board 54; as Figure 16 As shown, along the second direction Y, the main body 70A of the tenth differential signal line 710, the eleventh differential signal line 711, and the twelfth differential signal line 712 is provided on the side of the second sub-part 70A2 of the seventh differential signal line 77, the eighth differential signal line 78, and the ninth differential signal line 79 near the first circuit board 60; or, as... Figure 17 As shown, along the second direction Y, the main body 70A of the tenth differential signal line 710, the eleventh differential signal line 711 and the twelfth differential signal line 712 is provided on the side of the second sub-part 70A2 of the seventh differential signal line 77, the eighth differential signal line 78 and the ninth differential signal line 79 away from the first circuit board 60.

[0087] In some possible implementations, such as Figure 18 As shown, along the second direction Y, the distances between the main body portion 78A of the eighth differential signal line 78, the main body portion 77A of the seventh differential signal line 77, and the main body portion 79A of the ninth differential signal line 79 and the main body portion 710A of the tenth differential signal line 710 increase sequentially; or, as... Figure 19As shown, along the second direction Y, the distances between the main body portion 79A of the ninth differential signal line 79, the main body portion 77A of the seventh differential signal line 77, the main body portion 78A of the eighth differential signal line 78, and the main body portion 710A of the tenth differential signal line 710 increase sequentially.

[0088] In some possible implementations, such as Figure 15 As shown, at least a portion of the first connection portion 77C of the seventh differential signal line 77 and at least a portion of the eighth differential signal line 78 are arranged at intervals along the third direction Z.

[0089] In some possible implementations, such as Figure 20 As shown, the first connection portion 70C of one of the seventh differential signal line 77 and the eighth differential signal line 78, namely the first connection portion 77C of the seventh differential signal line 77 or the first connection portion 78C of the eighth differential signal line 78, includes a first portion 70D and a second portion 70E; the first portion 70D and the other of the seventh differential signal line 77 and the eighth differential signal line 78 are arranged at intervals along the third direction Z, and the first portion 70D and the second portion 70E are connected through a via.

[0090] In some possible implementations, such as Figure 17 As shown, the second circuit board 50 also includes a second flexible circuit board 50B, one end of which is connected to the third sub-board 53 and the other end of which is connected to the fourth sub-board 54; the seventh differential signal line 77, the eighth differential signal line 78 and the ninth differential signal line 79 each also include a second connecting portion 70B disposed on the second flexible circuit board 50B, one end of which is connected to the first sub-part 70A1 of the main body 70A and the other end of which is connected to the second sub-part 70A2 of the main body 70A; the second connecting portion 77B of the seventh differential signal line 77 is located between the second connecting portion 78B of the eighth differential signal line 78 and the second connecting portion 79B of the ninth differential signal line 79.

[0091] In some possible implementations, such as Figure 13 As shown, the fourth circuit board 54 also includes a fourth connector 541. The fourth circuit board 54 and the central control board 40 are connected through the third connector 402 and the fourth connector 541. The seventh differential signal line 77, the eighth differential signal line 78, the ninth differential signal line 79, the tenth differential signal line 710, the eleventh differential signal line 711 and the twelfth differential signal line 712 are all electrically connected to the fourth connector 541.

[0092] The technical effects achievable by the seventh sub-circuit board 67, the eighth sub-circuit board 68, the ninth sub-circuit board 69, the tenth sub-circuit board 610, the eleventh sub-circuit board 611, the twelfth sub-circuit board 612, the seventh differential signal line 77, the eighth differential signal line 78, the ninth differential signal line 79, the tenth differential signal line 710, the eleventh differential signal line 711, and the twelfth differential signal line 712 described above can be referred to the descriptions of the first sub-circuit board 61, the second sub-circuit board 62, the third sub-circuit board 63, the fourth sub-circuit board 64, the fifth flip-chip film 5, the sixth sub-circuit board 66, the first differential signal line 71, the second differential signal line 72, the third differential signal line 73, the fourth differential signal line 74, the fifth differential signal line 75, and the sixth differential signal line 76 in the foregoing sections, and will not be repeated here.

[0093] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display module, characterized in that, include: The display panel includes a display area and a bonding area located on one side of the display area, the bonding area being provided with pins; Multiple first circuit boards arranged side by side are located on one side of the display panel and on the side of the bonding area away from the display area; one end of each first circuit board is electrically connected to the pin. The second circuit board is disposed on the side of the plurality of first circuit boards away from the display panel; The central control board is located on the side of the second circuit board away from the display panel; Multiple differential signal lines are provided, at least a portion of which are disposed on the second circuit board; one end of each differential signal line is electrically connected to the first circuit board, and the other end is electrically connected to the central control board. The plurality of first circuit boards include a first sub-circuit board, a second sub-circuit board, and a third sub-circuit board spaced apart along a first direction, the first direction intersecting the arrangement direction of the display area and the bonding area; along the first direction, the distances between the first sub-circuit board, the second sub-circuit board, and the third sub-circuit board and the central control board increase sequentially; The plurality of differential signal lines include a first differential signal line, a second differential signal line, and a third differential signal line spaced apart; the first differential signal line is electrically connected to the first sub-circuit board, the second differential signal line is electrically connected to the second sub-circuit board, and the third differential signal line is electrically connected to the third sub-circuit board; a portion of the first differential signal line is located between the second differential signal line and the third differential signal line.

2. The display module according to claim 1, characterized in that, The differential signal line includes a main body portion disposed on the second circuit board; the main body portion extends along the first direction; The main body of the first differential signal line is located between the main body of the second differential signal line and the main body of the third differential signal line.

3. The display module according to claim 2, characterized in that, The second circuit board includes a first sub-board and a second sub-board arranged along the first direction; the first sub-board, the second sub-board, and the third sub-board are respectively connected to the first sub-board; The main body of the first differential signal line, the second differential signal line, and the third differential signal line each includes a first sub-part disposed on the first sub-board and a second sub-part disposed on the second sub-board. In one differential signal line, the first sub-part is connected to the central control board through the second sub-part. The first sub-section of the first differential signal line is located between the first sub-section of the second differential signal line and the first sub-section of the third differential signal line; the second sub-section of the first differential signal line is located between the second sub-section of the second differential signal line and the second sub-section of the third differential signal line.

4. The display module according to claim 3, characterized in that, The plurality of sub-circuit boards further include a fourth sub-circuit board, a fifth sub-circuit board, and a sixth sub-circuit board spaced apart along a first direction, wherein the fourth sub-circuit board, the fifth sub-circuit board, and the sixth sub-circuit board are respectively connected to the second sub-board; along the first direction, the distances between the fourth sub-circuit board, the fifth sub-circuit board, and the sixth sub-circuit board and the central control board increase sequentially; The differential signal lines also include a fourth differential signal line, a fifth differential signal line, and a sixth differential signal line that are spaced apart. The fourth differential signal line is electrically connected to the fourth sub-circuit board, the fifth differential signal line is electrically connected to the fifth sub-circuit board, and the sixth differential signal line is electrically connected to the sixth sub-circuit board. Along the second direction, the distances between the main body portions of the fourth differential signal line, the fifth differential signal line, and the sixth differential signal line and the main body portion of the first differential signal line increase sequentially; or, along the second direction, the distances between the main body portions of the fifth differential signal line, the fourth differential signal line, and the sixth differential signal line and the main body portion of the first differential signal line increase sequentially; the second direction is perpendicular to the first direction.

5. The display module according to claim 4, characterized in that, Along the second direction, the main body portions of the fourth, fifth, and sixth differential signal lines are disposed on the side of the second sub-portion of the first, second, and third differential signal lines near the first circuit board; or, Along the second direction, the main body portions of the fourth differential signal line, the fifth differential signal line, and the sixth differential signal line are disposed on the side of the second sub-portion of the first differential signal line, the second differential signal line, and the third differential signal line away from the first circuit board.

6. The display module according to claim 4, characterized in that, Along the second direction, the distances between the main body portion of the second differential signal line, the main body portion of the first differential signal line, the main body portion of the third differential signal line, and the main body portion of the fourth differential signal line increase sequentially. Alternatively, along the second direction, the distances between the main body of the third differential signal line, the main body of the first differential signal line, the main body of the second differential signal line, and the main body of the fourth differential signal line increase sequentially.

7. The display module according to claim 2, characterized in that, The differential signal line further includes a first connection portion disposed on the second circuit board. In one differential signal line, the first connection portion is disposed between the main body and the first circuit board electrically connected to the differential signal line. At least a portion of the first connection of the first differential signal line and at least a portion of the second differential signal line are arranged at intervals along a third direction, wherein the third direction is the thickness direction of the second circuit board.

8. The display module according to claim 7, characterized in that, The first connection portion of one of the first differential signal line and the second differential signal line includes a first portion and a second portion; the first portion and the other of the first differential signal line and the second differential signal line are spaced apart along the third direction, and the first portion and the second portion are connected by a via.

9. The display module according to claim 3, characterized in that, The second circuit board also includes a first flexible circuit board, one end of which is connected to the first sub-board and the other end of which is connected to the second sub-board; The first differential signal line, the second differential signal line, and the third differential signal line all further include a second connection portion disposed on the first flexible circuit board, one end of the second connection portion being connected to the first sub-part of the main body portion, and the other end being connected to the second sub-part of the main body portion; The second connection portion of the first differential signal line is located between the second connection portion of the second differential signal line and the second connection portion of the third differential signal line.

10. The display module according to claim 4, characterized in that, The second sub-board further includes a first connector, and the central control board further includes a second connector. The second sub-board and the central control board are connected through the first connector and the second connector. The first differential signal line, the second differential signal line, the third differential signal line, the fourth differential signal line, the fifth differential signal line, and the sixth differential signal line are all electrically connected to the first connector.

11. The display module according to claim 10, characterized in that, The central control board further includes a third connector, which is spaced apart from the second connector along the first direction; The plurality of first circuit boards further include a seventh sub-circuit board, an eighth sub-circuit board, and a ninth sub-circuit board that are spaced apart along the first direction, wherein the distances between the seventh sub-circuit board, the eighth sub-circuit board, and the ninth sub-circuit board and the central control board increase sequentially along the first direction; The plurality of differential signal lines also include a seventh differential signal line, an eighth differential signal line, and a ninth differential signal line electrically connected to the third connector. The seventh differential signal line is electrically connected to the seventh sub-circuit board, the eighth differential signal line is electrically connected to the eighth sub-circuit board, and the ninth differential signal line is electrically connected to the ninth sub-circuit board. A portion of the seventh differential signal line is located between the eighth differential signal line and the ninth differential signal line.

12. The display module according to claim 11, characterized in that, The main body of the seventh differential signal line is located between the main body of the eighth differential signal line and the main body of the ninth differential signal line.

13. The display module according to claim 12, characterized in that, The second circuit board further includes a third sub-board and a fourth sub-board arranged along the first direction; the seventh sub-board, the eighth sub-board, and the ninth sub-board are respectively connected to the third sub-board; The main body of the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line each includes a first sub-part disposed on the third sub-board and a second sub-part disposed on the fourth sub-board. In one differential signal line, the first sub-part is connected to the central control board through the second sub-part. The first sub-section of the seventh differential signal line is located between the first sub-section of the eighth differential signal line and the first sub-section of the ninth differential signal line; the second sub-section of the seventh differential signal line is located between the second sub-section of the eighth differential signal line and the second sub-section of the ninth differential signal line.

14. The display module according to claim 13, characterized in that, The plurality of first circuit boards further include a tenth sub-circuit board, an eleventh sub-circuit board, and a twelfth sub-circuit board spaced apart along a first direction, wherein the tenth sub-circuit board, the eleventh sub-circuit board, and the twelfth sub-circuit board are electrically connected to the fourth sub-board respectively; along the first direction, the distance between the tenth sub-circuit board, the eleventh sub-circuit board, and the twelfth sub-circuit board and the central control board increases sequentially; The differential signal lines also include a tenth differential signal line, an eleventh differential signal line, and a twelfth differential signal line that are spaced apart. The tenth differential signal line is electrically connected to the tenth sub-circuit board, the eleventh differential signal line is electrically connected to the eleventh sub-circuit board, and the twelfth differential signal line is electrically connected to the twelfth sub-circuit board. Along the second direction, the distances between the main body portion of the tenth differential signal line, the main body portion of the eleventh differential signal line, and the main body portion of the twelfth differential signal line and the main body portion of the seventh differential signal line increase sequentially; or, along the second direction, the distances between the main body portion of the eleventh differential signal line, the main body portion of the tenth differential signal line, and the main body portion of the twelfth differential signal line and the main body portion of the seventh differential signal line increase sequentially.

15. The display module according to claim 14, characterized in that, Along the second direction, the main body portions of the tenth differential signal line, the eleventh differential signal line, and the twelfth differential signal line are disposed on the side of the second sub-portion of the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line near the sub-circuit board; or, Along the second direction, the main body portions of the tenth differential signal line, the eleventh differential signal line, and the twelfth differential signal line are disposed on the side of the second sub-part of the seventh differential signal line, the eighth differential signal line, and the ninth differential signal line away from the sub-circuit board.

16. The display module according to claim 14, characterized in that, Along the second direction, the distances between the main body portion of the eighth differential signal line, the main body portion of the seventh differential signal line, the main body portion of the ninth differential signal line, and the main body portion of the tenth differential signal line increase sequentially; Alternatively, along the second direction, the distances between the main body portion of the ninth differential signal line, the main body portion of the seventh differential signal line, the main body portion of the eighth differential signal line, and the main body portion of the tenth differential signal line increase sequentially.

17. The display module according to claim 12, characterized in that, The differential signal line further includes a first connection portion disposed on the circuit board. In one differential signal line, the first connection portion is disposed between the main body and the flip-chip film electrically connected to the differential signal line. At least a portion of the first connection of the seventh differential signal line and at least a portion of the eighth differential signal line are arranged at intervals along a third direction.

18. The display module according to claim 17, characterized in that, The first connection portion of one of the seventh differential signal line and the eighth differential signal line includes a first portion and a second portion; the first portion and the other of the seventh differential signal line and the eighth differential signal line are spaced apart along the third direction, and the first portion and the second portion are connected by a via.

19. The display module according to claim 13, characterized in that, The second circuit board also includes a second flexible circuit board, one end of which is connected to the third sub-board and the other end of which is connected to the fourth sub-board; The seventh differential signal line, the eighth differential signal line, and the ninth differential signal line all further include a second connection portion disposed on the second flexible circuit board, one end of the second connection portion being connected to the first sub-part of the main body portion, and the other end being connected to the second sub-part of the main body portion; The second connection portion of the seventh differential signal line is located between the second connection portion of the eighth differential signal line and the second connection portion of the ninth differential signal line.

20. The display module according to claim 14, characterized in that, The fourth circuit board further includes a fourth connector, and the fourth sub-board and the central control board are connected through the third connector and the fourth connector; The seventh differential signal line, the eighth differential signal line, the ninth differential signal line, the tenth differential signal line, the eleventh differential signal line, and the twelfth differential signal line are all electrically connected to the fourth connector.

21. A display device, characterized in that, include: The display module as described in any one of claims 1 to 20.

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