Display module and display device

Abstract

This application discloses a display module and a display device. The display module includes a control board and a horizontal circuit board. The control board includes a timing controller and a first connector. The first connector includes multiple first signal pins and multiple first ground pins. The timing controller is electrically connected to the corresponding first signal pin. The horizontal circuit board includes multiple driving devices and a second connector. The second connector includes multiple second signal pins and multiple second ground pins. Each driving device is electrically connected to a corresponding second signal pin, and the second signal pin is electrically connected to a corresponding first signal pin. Two first signal pins are disposed between every two adjacent first ground pins, and two second signal pins are disposed between every two adjacent second ground pins. This application can improve the high-speed signal transmission capability and alleviate display problems encountered when Mini-LVDS technology is applied to large-size display panels.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to a display module and display device. Background Technology

[0002] With increasingly higher resolutions and refresh rates in current display panels, it's necessary to improve signal transmission distance and bandwidth to accommodate larger display sizes. Common display modules primarily consist of a timing controller (TCON) and a driver IC. The timing controller transmits the corresponding display data to the driver IC via the Mini-LVDS (Mini-Low Voltage Differential Signaling) protocol. The bandwidth of the Mini-LVDS protocol is typically 200MHz~400MHz, and the transmission rate is usually 400Mbps~800Mbps. For some large-size display panels (e.g., 55 inches and above), the Mini-LVDS protocol is susceptible to transmission distance limitations, leading to higher error rates, image distortion, or display failure. This prevents ultra-long-distance, ultra-high-frequency signal transmission, negatively impacting the user experience of large-size display panels. Summary of the Invention

[0003] The embodiments of this application provide a display module and display device to improve the transmission performance of Mini-LVDS, thereby improving the display problems that occur when Mini-LVDS technology is applied to large-size display panels and enhancing the user experience of large-size display panels.

[0004] To address the aforementioned technical problems, embodiments of this application disclose the following technical solutions: Firstly, a display module is provided, comprising: A control board, the control board including a timing controller and a first connector, the first connector including a plurality of first signal pins and a plurality of first ground pins, the timing controller being electrically connected to the corresponding first signal pin; A horizontal circuit board, the horizontal circuit board including a plurality of driving devices and a second connector, the second connector including a plurality of second signal pins and a plurality of second ground pins, each of the driving devices being electrically connected to a corresponding second signal pin, and the second signal pin being electrically connected to a corresponding first signal pin; Specifically, two first signal pins are provided between every two adjacent first ground pins, and two second signal pins are provided between every two adjacent second ground pins.

[0005] In conjunction with the first aspect, the horizontal circuit board further includes: A first transmission line extends along a first direction, and one end of the first transmission line is connected to the corresponding second signal pin. Multiple second transmission lines are spaced apart, each second transmission line extends along a second direction, the first direction intersects the second direction, one end of each second transmission line is connected to the first transmission line, and the other end of each second transmission line is connected to the corresponding driving device. The length of each of the second transmission lines is less than or equal to a predetermined length, which is determined based on the wavelength and frequency of the transmitted signal, the resonant mode of the horizontal circuit board, and the relative permittivity.

[0006] In conjunction with the first aspect, the set length is determined by the following formula:

[0007] Wherein, Stub Length is the set length, λ is the wavelength of the transmitted signal, N is the number of resonant modes of the horizontal circuit board, Er is the relative permittivity of the horizontal circuit board, and f is the frequency of the transmitted signal.

[0008] In conjunction with the first aspect, the horizontal circuit board further includes: A termination resistor is provided, which is connected in parallel at the end of the first transmission line away from the second signal pin, and the resistance value of the termination resistor is the same as the impedance of the driving device.

[0009] In conjunction with the first aspect, the horizontal circuit board further includes: A first substrate, wherein the first transmission line and the second transmission line are disposed on the first substrate, and neither the side of the first transmission line facing away from the first substrate nor the side of the second transmission line facing away from the first substrate is provided with a protective layer.

[0010] In conjunction with the first aspect, the first substrate includes: A first sub-substrate and a second sub-substrate are distributed along the first direction. The first sub-substrate and the second sub-substrate are connected by a flexible printed circuit board. The second connector is disposed on the first sub-substrate.

[0011] In conjunction with the first aspect, the display module further includes a flexible flat cable, through which the second signal pin is connected to the corresponding first signal pin; the flexible flat cable includes: Second substrate; The third transmission line is disposed on the second substrate and extends along the second direction. The two ends of the third transmission line are respectively connected to the corresponding first signal pin and the corresponding second signal pin. The side of the third transmission line away from the second substrate is not provided with a protective layer.

[0012] In conjunction with the first aspect, the control board further includes: The timing controller and the first connector are both disposed on the third substrate; A fourth transmission line is disposed on the third substrate. The two ends of the fourth transmission line are respectively connected to the timing controller and the corresponding first signal pin. The side of the fourth transmission line away from the third substrate is not provided with a protective layer.

[0013] In conjunction with the first aspect, the fourth transmission line is a transmission line based on the Mini Low Voltage Differential Signaling Protocol.

[0014] In a second aspect, a display device is provided, comprising a display module as described in any one of the first aspects.

[0015] One of the above technical solutions has the following advantages or beneficial effects: Compared with the prior art, the display module of this application includes: a control board and a horizontal circuit board. The control board includes a timing controller and a first connector. The first connector includes multiple first signal pins and multiple first ground pins. The timing controller is electrically connected to the corresponding first signal pin. The horizontal circuit board includes multiple driving devices and a second connector. The second connector includes multiple second signal pins and multiple second ground pins. Each driving device is electrically connected to the corresponding second signal pin, and the second signal pin is electrically connected to the corresponding first signal pin. Two first signal pins are arranged between every two adjacent first ground pins, and two second signal pins are arranged between every two adjacent second ground pins. The display module provided by this application sets the architecture of the first and second connectors to a GSSG (GND, Signal, Signal, GND, ground, signal, signal, ground) architecture. This can control the connector impedance within a set range, thereby effectively solving the problem of connector impedance abrupt changes, improving the high-speed signal transmission capability, and thus improving the display problems caused by insufficient transmission performance when Mini-LVDS technology is applied to large-size display panels.

[0016] The present application discloses a display device that can improve the high-speed signal transmission capability, thereby achieving better display effects and providing a better user experience when Mini-LVDS technology is applied. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of an example structure of a display module according to an embodiment of this application; Figure 2 for Figure 1 A partial structural diagram of the first connector in the middle; Figure 3 This is a schematic diagram of impedance simulation of the first connector and the second connector in the embodiments of this application; Figure 4 This is a cross-sectional example structural diagram of the control board according to an embodiment of this application; Figure 5 for Figure 4 A simulation diagram of the insertion loss of the fourth transmission line on the control board shown. Figure 6 for Figure 1 A schematic diagram of one angle of region A in the middle; Figure 7 This is a signal eye diagram of the display module in an embodiment of this application.

[0019] Figure label: 10-Control board; 11-Timing controller; 12-First connector; 121-First signal pin; 122-First ground pin; 13-Third substrate; 14-Fourth transmission line; 15-First pad; 20-Horizontal circuit board; 21-Driver; 22-Second connector; 221-Second signal pin; 222-Second ground pin; 23-First transmission line; 24-Second transmission line; 25-First substrate; 251-First sub-substrate; 252-Second sub-substrate; 26-Termination resistor; 27-Flexible printed circuit board; 30-Flexible flat cable; 31-Second substrate; 32-Third transmission line. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, 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, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0022] Mini-LVDS transmission is limited by transmission distance, making it unsuitable for ultra-long-distance, ultra-high-frequency transmission. There are two main reasons for this: First, Mini-LVDS often uses parallel transmission, and the one-to-many configuration increases the load, leading to a decrease in driving capability. Second, printed circuit boards (PCBs) are prone to asymmetrical structures due to manufacturing errors, which can cause signal reflection and exacerbate signal distortion. Therefore, Mini-LVDS is typically used in display panels smaller than 55 inches. When applied to larger display panels (55 inches and above), insufficient transmission performance can lead to image distortion or display failure, negatively impacting the user experience.

[0023] To address the aforementioned issues, this application provides a display module that, based on the current Mini-LVDS communication interface, improves the transmission structure to avoid connector impedance abrupt changes, enabling Mini-LVDS to meet the requirements of large-size displays in terms of long-distance and high-frequency transmission, thereby improving the resolution and refresh rate of large-size display panels and enhancing the user experience.

[0024] Please refer to the following: Figure 1 and Figure 2 , Figure 1 The illustration shows an example structure of the display module according to an embodiment of this application. Figure 2 It indicated Figure 1The first connector in the first application is partially structured. The display module provided in this embodiment includes a control board 10 and a horizontal circuit board 20. The control board 10 includes a timing controller 11 and a first connector 12. The timing controller 11, also known as a TCON (logic board) chip, is used to generate display signals. The first connector 12 includes multiple first signal pins 121 and multiple first ground pins 122. The first signal pins 121 are used to connect to a transmission signal S, and the first ground pins 122 are used to connect to a ground signal G. The timing controller 11 is electrically connected to the corresponding first signal pin 121. Two first signal pins 121 are provided between every two adjacent first ground pins 122. The first ground pins 122 and the first signal pins 121 of the first connector 12 can be connected to the third substrate 13 via first pads 15.

[0025] Please continue reading. Figure 1 The horizontal circuit board 20 includes multiple driving devices 21 and a second connector 22. The driving devices 21 (i.e., drivers) are used to drive the display panel to display images based on display signals. The second connector 22 includes multiple second signal pins 221 and multiple second ground pins 222. Each driving device 21 is electrically connected to a corresponding second signal pin 221, and the second signal pin 221 is electrically connected to a corresponding first signal pin 121. Two second signal pins 221 are arranged between every two adjacent second ground pins 222. It can be understood that the arrangement of the second ground pins 222 and the second signal pins 221 can be referenced... Figure 2 The arrangement of the first ground pin 122 and the first signal pin 121 shown in the figure will not be described separately here.

[0026] Please see Figure 3 , Figure 3 The diagram illustrates the impedance simulation of the first connector and the second connector in the embodiments of this application. In the simulation diagram, m5 is the sampling point, corresponding to 2.2 nanoseconds (nsec), and the connector impedance (TDR_DiffA) is 101.696%. By using the first connector 12 and the second connector 22 in the embodiments of this application, the connector impedance (TDR_DiffA) can be controlled within the range of 100% ± 10%.

[0027] Thus, the architecture of the first connector 12 and the second connector 22 is both GSSG architecture, which helps to solve the problem of impedance change in the connector, thereby avoiding the transmission loss caused by impedance change, improving the high-speed signal transmission capability from the timing controller 11 to the drive device 21, and thus improving the display problem caused by insufficient transmission performance when Mini-LVDS technology is applied to large-size display panels.

[0028] The control board 10 and the horizontal circuit board 20 of the embodiments of this application will be described in detail below.

[0029] Please continue reading. Figure 1 In some examples, the control board 10 also includes a third substrate 13 and a fourth transmission line 14. The timing controller 11, the first connector 12 and the fourth transmission line 14 are all disposed on the third substrate 13, and the two ends of the fourth transmission line 14 are respectively connected to the timing controller 11 and the corresponding first signal pin 121.

[0030] For example, the fourth transmission line 14 is a transmission line based on the Mini-LVDS protocol, that is, the fourth transmission line 14 is a Mini-LVDS transmission line. Therefore, the display signal sent by the timing controller 11 is a Mini-LVDS signal. The third substrate 13 can use conventional board materials, such as FR4 board. FR4 board is a composite material composed of fiberglass cloth and epoxy resin; the FR4 in its name refers to the material specification used for the fiberglass cloth. This does not increase the cost of the board material and is more practical.

[0031] Specifically, the impedance of the fourth transmission line 14 can be approximately calculated using the following formula (1):

[0032] In formula (1), Z is the impedance of the fourth transmission line 14, and ε r is the relative dielectric constant, h is the dielectric thickness, and w is the conductor width.

[0033] The insertion loss of the fourth transmission line 14 can be approximately calculated using the following formula (2):

[0034] In formula (2), σ is the insertion loss of the fourth transmission line 14, and ε r ε is the relative dielectric constant, ε0 is the vacuum dielectric constant, and tan(δ) is the loss factor.

[0035] It is understood that the characteristic impedance of the fourth transmission line 14 can be controlled by changing the physical dimensions of the conductor and the dielectric thickness. The insertion loss of the fourth transmission line 14 can be changed by changing the relative dielectric constant and the loss factor. For details on how to reduce the insertion loss of the fourth transmission line 14, please refer to the description of the following embodiments.

[0036] Please see Figure 4 , Figure 4 The diagram illustrates a cross-sectional example structure of the control board according to an embodiment of this application. The fourth transmission line 14 is routed on the surface of the third substrate 13, and no protective layer is provided on the side of the fourth transmission line 14 facing away from the third substrate 13 (see [link to documentation]). Figure 4(Dashed line in the diagram) That is to say, the side of the fourth transmission line 14 facing away from the third substrate 13 is exposed to the current environment. Normally, the control board 10 will provide a protective layer, such as an ink layer, on the side of the fourth transmission line 14 facing away from the third substrate 13 to better protect the fourth transmission line 14. However, in this embodiment, the protective layer on the side of the fourth transmission line 14 facing away from the third substrate 13 is removed, which can save the cost of setting a protective layer by controlling the environmental quality of the current environment.

[0037] Please see Figure 5 , Figure 5 It indicated Figure 4 The simulation diagram of the insertion loss of the fourth transmission line on the control board is shown. Figure 5 Curve a represents the insertion loss of the GSSG architecture connector and the fourth transmission line 14 with an ink layer at different frequencies. Curve b represents the insertion loss of the GSSG architecture connector and the fourth transmission line 14 without an ink layer at different frequencies in this embodiment. m5 and m6 are two sampling points. At 2.8 GHz, the insertion loss of curve a (dB(SDD21A)) differs from that of curve b (dB(SDD21B)) by 0.3 dB. At 10 GHz, the difference between the insertion loss of curve a (dB(SDD21A)) and curve b (dB(SDD21B)) is close to 1 dB. Therefore, without an ink layer, the insertion loss of the fourth transmission line 14 is lower, especially at higher frequencies.

[0038] Thus, by wiring the surface of the control board 10 and removing the protective layer on the side of the fourth transmission line 14 away from the third substrate 13, the insertion loss of the fourth transmission line 14 can be reduced, thereby further reducing the loss in the transmission line and improving the transmission capability of the transmission line.

[0039] Please continue reading. Figure 1 In some examples, the horizontal circuit board 20 also includes a first transmission line 23 and a plurality of second transmission lines 24. The first transmission line 23 extends along a first direction X, and one end of the first transmission line 23 is connected to a corresponding second signal pin 221. The plurality of second transmission lines 24 are spaced apart, each second transmission line 24 extending along a second direction Y, where the first direction X intersects the second direction Y. Exemplarily, the first direction X can be horizontal, and the second direction Y can be perpendicular to the first direction X. One end of each second transmission line 24 is connected to the first transmission line 23, and the other end of each second transmission line 24 is connected to a corresponding driving device 21. The length of each second transmission line 24 is less than or equal to a predetermined length, which is determined based on the wavelength and frequency of the transmitted signal, the resonant mode of the horizontal circuit board 20, and the relative permittivity.

[0040] For example, the length is determined by the following formula (3):

[0041] In formula (3), Stub Length is the set length, λ is the wavelength of the transmitted signal, N is the number of resonant modes of the horizontal circuit board 20, Er is the relative permittivity of the horizontal circuit board 20, and f is the frequency of the transmitted signal.

[0042] Thus, by controlling the length of the second transmission line 24 to be less than or equal to a set length, that is, controlling the branch length of the signal, the signal reflection situation can be greatly improved, thereby avoiding signal distortion and improving the long-distance transmission capability and quality.

[0043] For example, both the first transmission line 23 and the second transmission line 24 are transmission lines based on the Mini-LVDS protocol, that is, both the first transmission line 23 and the second transmission line 24 are Mini-LVDS transmission lines.

[0044] In some examples, the horizontal circuit board 20 also includes a first substrate 25. The first transmission line 23 and the second transmission line 24 are disposed on the first substrate 25. Neither the side of the first transmission line 23 facing away from the first substrate 25 nor the side of the second transmission line 24 facing away from the first substrate 25 is provided with a protective layer. That is to say, the side of the first transmission line 23 and the second transmission line 24 facing away from the first substrate 25 are exposed to the current environment.

[0045] For example, the first substrate 25 can be made of conventional board material, such as FR4 board. The first transmission line 23 and the second transmission line 24 are wired on the surface of the first substrate 25, and the wiring method of the fourth transmission line 14 described above can be referred to, and will not be repeated here. In addition, the first transmission line 23 and the second transmission line 24 can also be impedance controlled with reference to the aforementioned formula (1), and will not be repeated here.

[0046] In some examples, the first substrate 25 includes a first sub-substrate 251 and a second sub-substrate 252 distributed along a first direction X. The first sub-substrate 251 and the second sub-substrate 252 are connected by a flexible printed circuit board 27, and a second connector 22 is disposed on the first sub-substrate 251. The second ground pin 222 and the second signal pin 221 of the second connector 22 are connected to the first sub-substrate 251 through a second pad. Multiple driving devices 21 are distributed on the first sub-substrate 251 and the second sub-substrate 252, and a first transmission line 23 can sequentially pass through the first sub-substrate 251, the flexible printed circuit board 27, and the second sub-substrate 252. The first sub-substrate 251 can be an XRL board, and the second sub-substrate 252 can be an XRR board.

[0047] In some examples, the display module of this application embodiment may further include a flexible flat cable 30, through which the second signal pin 221 is connected to the corresponding first signal pin 121. The flexible flat cable 30 may include a second substrate 31 and a third transmission line 32. The third transmission line 32 is disposed on the second substrate 31 and extends along the second direction Y. The two ends of the third transmission line 32 are respectively connected to the corresponding first signal pin 121 and the corresponding second signal pin 221. The side of the third transmission line 32 facing away from the second substrate 31 is not provided with a protective layer, that is, the side of the third transmission line 32 facing away from the second substrate 31 is exposed to the current environment.

[0048] For example, the second substrate 31 can be made of conventional board material, such as FR4 board. The third transmission line 32 is wired on the surface of the second substrate 31, and the wiring method of the fourth transmission line 14 described above can be referred to, and will not be repeated here. In addition, the impedance control of the third transmission line 32 can also be performed with reference to the aforementioned formula (1), and will not be repeated here.

[0049] For example, the third transmission line 32 is a transmission line based on the Mini-Low Voltage Differential Signaling Protocol, that is, the third transmission line 32 is a Mini-LVDS transmission line.

[0050] Specifically, during signal transmission, the Mini-LVDS signal emitted by the timing controller 11 is transmitted to the first connector 12 via the fourth transmission line 14 on the third substrate 13, and then transmitted to the third transmission line 32 on the second substrate 31 of the flexible flat cable 30. It then reaches the second connector 22 and is transmitted sequentially to the first transmission line 23 on the first sub-sub ...

[0051] Please see Figure 6 , Figure 6 It indicated Figure 1 A schematic diagram of one angle of region A in the middle. Figure 6 In this diagram, W represents the conductor width, S represents the conductor spacing, H represents the dielectric thickness, T represents the conductor thickness, and L represents the conductor length. In some examples, the horizontal circuit board 20 may also include a terminating resistor 26, connected in parallel at the end of the first transmission line 23 furthest from the second signal pin 221. The resistance of the terminating resistor 26 is the same as the impedance of the drive device 21. Exemplarily, the terminating resistor 26 may be connected in parallel between the last two second transmission lines 24, for example, between points B and C. The terminating resistor 26 may be 100 ohm.

[0052] Thus, by connecting a terminating resistor 26 in parallel at the end of the first transmission line 23, the present application embodiment can effectively avoid total signal reflection and improve the long-distance transmission capability and quality of the signal.

[0053] To better illustrate the solutions of the embodiments of this application, specific simulation examples are provided below.

[0054] Please see Figure 7 , Figure 7 The diagram illustrates the signal eye diagram of the display module according to an embodiment of this application. In the signal eye diagram, the horizontal axis represents time, and the vertical axis represents amplitude. By simulating the display module of this embodiment, the eye diagram signal c can be obtained. Since the center of the eye diagram signal c does not press against the standard hexagonal curve d, the transmission of the Mini-LVDS signal meets the requirements. Taking a conductor width w of 8.3 mil, a conductor spacing s of 5 mil, a dielectric thickness H of 4 mil, and a relative permittivity of 4.2 as an example, the length of the second transmission line 24 in the display module of this embodiment is much less than 150 mil, and it can meet the requirement of a transmission distance of 1.2 meters. Not only is the transmission distance increased by 2 times, but the signal rate is also increased from 8 Mbps to 1.14 Gbps, and the signal transmission rate is also greatly improved, which can meet the long-distance transmission requirements of large screens of 98 inches and above.

[0055] It is understood that the display module of this application embodiment, by improving the physical structure, connection structure and signal topology of the control board 10 and the horizontal circuit board 20, can realize ultra-distance and ultra-frequency transmission of the Mini-LVDS signal communication interface, and can improve the resolution and high refresh rate in ultra-large display panels, thereby enhancing the user experience.

[0056] Accordingly, the display device provided in this application includes the display module as described in any of the above embodiments. The display device can be a mobile phone, a computer, a television, a smart wearable device, etc., and this embodiment does not make any special limitation in this regard.

[0057] It is understood that the display device in this application embodiment can improve the ability of high-speed signal transmission, thereby achieving better display effects and a better user experience when Mini-LVDS technology is applied.

[0058] The above provides a detailed description of a display module and display device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A display module, characterized in that, include: The control board (10) includes a timing controller (11) and a first connector (12). The first connector (12) includes a plurality of first signal pins (121) and a plurality of first ground pins (122). The timing controller (11) is electrically connected to the corresponding first signal pins (121). A horizontal circuit board (20) includes multiple driving devices (21), a second connector (22), a first transmission line (23), and multiple second transmission lines (24). The second connector (22) includes multiple second signal pins (221) and multiple second ground pins (222). Each driving device (21) is electrically connected to a corresponding second signal pin (221), and the second signal pin (221) is electrically connected to a corresponding first signal pin (121). One end of the first transmission line (23) is connected to a corresponding second signal pin (221). Multiple second transmission lines (24) are spaced apart, one end of each second transmission line (24) is connected to the first transmission line (23), and the other end of each second transmission line (24) is connected to a corresponding driving device (21). Wherein, two first signal pins (121) are provided between every two adjacent first ground pins (122), and two second signal pins (221) are provided between every two adjacent second ground pins (222); the length of each second transmission line (24) is less than or equal to a set length, which is determined by the following formula: In the formula, Stub Length is the set length, λ is the wavelength of the transmitted signal, N is the number of resonant modes of the horizontal circuit board (20), Er is the relative permittivity of the horizontal circuit board (20), and f is the frequency of the transmitted signal.

2. The display module according to claim 1, characterized in that, The first transmission line (23) extends along a first direction (X); each of the second transmission lines (24) extends along a second direction (Y), the first direction (X) intersecting the second direction (Y).

3. The display module according to claim 1, characterized in that, The horizontal circuit board (20) also includes: Termination resistor (26) is connected in parallel at one end of the first transmission line (23) away from the second signal pin (221), and the resistance value of the termination resistor (26) is the same as the impedance of the driving device (21).

4. The display module according to claim 2, characterized in that, The horizontal circuit board (20) also includes: The first substrate (25) has the first transmission line (23) and the second transmission line (24) disposed on the first substrate (25). The side of the first transmission line (23) away from the first substrate (25) and the side of the second transmission line (24) away from the first substrate (25) are not provided with protective layers.

5. The display module according to claim 4, characterized in that, The first substrate (25) includes: A first sub-substrate (251) and a second sub-substrate (252) are distributed along the first direction (X). The first sub-substrate (251) and the second sub-substrate (252) are connected by a flexible printed circuit board (27). The second connector (22) is disposed on the first sub-substrate (251).

6. The display module according to claim 5, characterized in that, The display module further includes a flexible flat cable (30), through which the second signal pin (221) and the corresponding first signal pin (121) are connected; the flexible flat cable (30) includes: Second substrate (31); The third transmission line (32) is disposed on the second substrate (31) and extends along the second direction (Y). The two ends of the third transmission line (32) are respectively connected to the corresponding first signal pin (121) and the corresponding second signal pin (221). The side of the third transmission line (32) away from the second substrate (31) is not provided with a protective layer.

7. The display module according to claim 1, characterized in that, The control panel (10) also includes: The timing controller (11) and the first connector (12) are both disposed on the third substrate (13); The fourth transmission line (14) is disposed on the third substrate (13). The two ends of the fourth transmission line (14) are respectively connected to the timing controller (11) and the corresponding first signal pin (121). The side of the fourth transmission line (14) away from the third substrate (13) is not provided with a protective layer.

8. The display module according to claim 7, characterized in that, The fourth transmission line (14) is a transmission line based on the Mini Low Voltage Differential Signaling Protocol.

9. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 8.

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