A display module and a display device

Abstract

The present invention discloses a display module and a display device. By separately arranging the driving ground line for the driving signal used for display inside the display panel and the shielding ground line for shielding electromagnetic interference signals, most of the external electromagnetic interference signals and the electromagnetic interference signals generated by the display module itself are directly released from the shielding ground line, and the amount of signals coupled to the FPC is greatly reduced. Only a very small part of the electromagnetic interference signals enter the driving ground line again, so the influence on the driving signal is greatly reduced. Therefore, the driving signal will not be distorted and will not affect the normal display of the display panel.

Description

Technical Field

[0001] The present invention relates to the technical field of display panel testing, and particularly to a display module and a display device. Background Art

[0002] With the progress of technology, display devices have been widely used in various fields. In particular, liquid crystal display devices or organic light-emitting diode display devices, due to their superior characteristics such as being thin and light in volume, low power consumption, and no radiation, have gradually replaced traditional cathode ray tube display devices and are applied to many types of electronic products, such as mobile phones, portable multimedia devices, laptop computers, or televisions, etc.

[0003] In addition, due to the increasingly powerful functions, faster operating speeds, and more intensive and complex electronic circuits of modern electronic products, the problem of Electro Magnetic Compatibility (EMC) has become one of the major challenges in circuit design. EMC includes Electro Magnetic Interference (EMI) and Electro Magnetic Susceptibility (EMS). EMC refers to the ability of a device or system to operate in compliance with requirements in its electromagnetic environment and not generate intolerable electromagnetic interference to any device in its environment. Moreover, there is a mutually restrictive relationship between EMI and EMS in terms of improvement. For example, improving the EMI problem may lead to a deterioration of EMS; conversely, improving the EMS problem may lead to an aggravation of the EMI problem. Therefore, how to simultaneously improve the EMI and EMS problems is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] Embodiments of the present invention provide a display module and a display device, which can improve the protection capabilities of electromagnetic interference and electromagnetic interference tolerance.

[0005] A display module provided by an embodiment of the present invention includes: a display panel, a conductive backplane located on the back of the display panel, and a driving ground line and a shielding ground line that are spaced apart and insulated from each other on a side of the conductive backplane facing away from the display panel; wherein, one end of the driving ground line is electrically connected to the display panel, one end of the shielding ground line is electrically connected to the conductive backplane, and the other ends of the driving ground line and the shielding ground line are both grounded.

[0006] Optionally, in the above display module provided by the embodiment of the present invention, the driving ground line includes: a first driving ground wire electrically connected to the display panel, a second driving ground wire electrically connected to the first driving ground wire, and a grounding end electrically connected to the second driving ground wire;

[0007] The shielding ground line includes: a first shielding ground line electrically connected to the conductive backplane, a second shielding ground line electrically connected to the first shielding ground line, and the grounding terminal electrically connected to the second shielding ground line.

[0008] Optionally, in the above display module provided by an embodiment of the present invention, the first shielding ground wire is electrically connected to the conductive backplane via a conductive tape.

[0009] Optionally, in the above display module provided by an embodiment of the present invention, the first shielding ground line is electrically connected to the corresponding second shielding ground line through a connector, and the first driving ground line is electrically connected to the second driving ground line through the connector.

[0010] Optionally, in the above display module provided by an embodiment of the present invention, a plurality of first pins are provided at one end of the connector, and a plurality of second pins are provided at the other end of the connector;

[0011] The first shielding ground wire is electrically connected to the corresponding first pin, and the second shielding ground wire is electrically connected to the corresponding second pin;

[0012] The first driving ground line is electrically connected to the corresponding first pin, and the second driving ground line is electrically connected to the corresponding second pin.

[0013] Optionally, in the above display module provided by an embodiment of the present invention, the number of the shielding ground circuits is greater than or equal to one.

[0014] Optionally, in the display module provided by an embodiment of the present invention, the number of the shielding ground circuits is two, and the two shielding ground circuits are respectively located on both sides of the driving ground circuit.

[0015] Optionally, in the above-mentioned display module provided by an embodiment of the present invention, the number of the first shielding ground wires is two, the number of the second shielding ground wires is two, the two first shielding ground wires are respectively located on both sides of the first driving ground wire, and the two second shielding ground wires are respectively located on both sides of the second driving ground wire.

[0016] Optionally, in the above-mentioned display module provided by the embodiment of the present invention, it further includes a flexible circuit board and a printed circuit board, wherein the flexible circuit board is used to electrically connect the display panel with the printed circuit board, and the printed circuit board is bent to a side of the conductive backplane away from the display panel through the flexible circuit board; wherein,

[0017] The flexible printed circuit board includes: a first substrate disposed on a side of the conductive backplane facing away from the display panel, and a first circuit layer located on a side of the first substrate facing away from the conductive backplane; the first circuit layer includes the first driving ground wire and the first shielding ground wire;

[0018] The printed circuit board includes: a second substrate disposed on a side of the conductive backplane facing away from the display panel, a second circuit layer located on a side of the second substrate facing away from the display panel, and the grounding end; the second circuit layer includes the second driving ground wire and the second shielding ground wire.

[0019] Correspondingly, an embodiment of the present invention further provides a display device, including the above-mentioned display module provided by the embodiment of the present invention.

[0020] The beneficial effects of the embodiments of the present invention are as follows:

[0021] A display module and a display device provided by an embodiment of the present invention separately arrange the driving ground line for the driving signal used for display inside the display panel and the shielding ground line for shielding electromagnetic interference signals. In this way, most of the external electromagnetic interference signals and the electromagnetic interference signals generated by the display module itself are directly released from the shielding ground line, and the amount of signals coupled to the FPC is greatly reduced. Only a very small part of the electromagnetic interference signals enter the driving ground line again, so the influence on the driving signal is greatly reduced. Therefore, the driving signal will not be distorted and will not affect the normal display of the display panel. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of a display module provided by an embodiment of the present invention;

[0023] Figure 2 is Figure 1 a plan view of the back of the conductive backplane in

[0024] Figure 3 is Figure 2 a grounding line architecture diagram for shielding electromagnetic signals corresponding to

[0025] Figure 4 is for Figure 2 the release path of electromagnetic interference signals corresponding to the grounding line shown;

[0026] Figure 5 is for Figure 2 a schematic diagram of the influence effect of electromagnetic interference signals corresponding to the grounding line shown on the driving signal of the display module;

[0027] Figure 6 is for Figure 2 the performance of the shielding line shown in a certain vehicle-mounted project;

[0028] Figure 7 A schematic plan view of the back surface of the conductive backplane corresponding to the display module provided by the embodiment of the present invention Figure 1 in the

[0029] Figure 8 A schematic plan view of the back surface of the conductive backplane corresponding to the display module provided by the embodiment of the present invention Figure 1 in the

[0030] Figure 9 is Figure 7 a schematic diagram of the architecture of the shielding ground line and the driving ground line corresponding to

[0031] Figure 10 is Figure 8 a schematic diagram of the architecture of two shielding ground lines and driving ground lines corresponding to

[0032] Figure 11 The release path of the electromagnetic interference signal of the display module provided by the embodiment of the present invention

[0033] Figure 12 A schematic diagram of the influence effect of the electromagnetic interference signal corresponding to the display module provided by the embodiment of the present invention on the driving signal of the display module

[0034] Figure 13 is the performance of the shielding line shown in Figure 8 in a certain vehicle-mounted project Specific Embodiments

[0035] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following will, with reference to the accompanying drawings, elaborate on the specific embodiments of a display module and a display device provided by the embodiments of the present invention

[0036] The shapes in the drawings do not reflect the true proportions of the display module, and the purpose is only to schematically illustrate the content of the present invention

[0037] In the related art, in order to improve the EMI and EMS problems that occur in the electronic circuits of display products, EMI is mainly an electromagnetic interference radiated by display products to the outside. The most important solution to this kind of defect is to use shielding grounding to block the radiated signal in the cavity of the display product and prevent external radiation; EMS is mainly conducted interference, which is the electromagnetic interference generated by external electromagnetic signals to the display product. The most important solution to this kind of defect is to cut off the transmission path of external electromagnetic interference, and the main method is insulation isolation

[0038] As Figure 1 shown Figure 1Schematic diagram of the structure of a display module provided in the related art, including: a display panel 1, a conductive backplane 2 located on the back of the display panel 1, and a flexible circuit board 3 (FPC) and a printed circuit board 4 (PCB) that are bonded and connected to the display panel 1; the flexible circuit board 3 and the printed circuit board 4 are electrically connected through a connector 5, and the printed circuit board 4 is bent to the side of the conductive backplane 2 away from the display panel 1 through the flexible circuit board 3.

[0039] As Figure 2 and Figure 3 shown, Figure 2 is Figure 1 a planar schematic diagram of the back of the conductive backplane 2 in Figure 3 is Figure 2 the corresponding grounding line architecture diagram for shielding electromagnetic signals. When the entire display module undergoes EMC RS (radio frequency radiation) or ESD (electrostatic discharge) tests, the connection method of the entire grounding line is as follows: the conductive backplane 2 is first electrically connected to the first grounding trace 7 (the grounding trace on the FPC) of the driving module in the display panel 1 through a conductive tape 6, and then the first grounding trace 7 is electrically connected to the second grounding trace 8 on the PCB through the connector 5, and finally the second grounding trace 8 is electrically connected to the ground terminal GND on the PCB. However, Figure 2 the grounding line for shielding electromagnetic signals shown in Figure 4 has the following problems: The release path of electromagnetic interference signals is as Figure 4 shown. The electromagnetic interference signal first enters the first grounding trace 7 on the FPC through the conductive backplane 2, then enters the second grounding trace 8 on the PCB through the connector 5 from the first grounding trace 7, and finally is released to the ground terminal GND on the PCB from the second grounding trace 8. In this way, when the electromagnetic interference signal enters the conductive backplane 2 from outside the display module, since the conductive backplane 2 is electrically connected to the first grounding trace 7 on the FPC, the driving signal in the display module is transmitted to the inside of the display panel through the traces on the FPC. The driving signals are, for example, DC signals on the data line, pulse signals on the gate line, etc. Therefore, the relatively strong external electromagnetic interference signal will be directly coupled to the driving signal, resulting in abnormal driving signals; and when the display module itself generates a relatively strong electromagnetic interference signal radiating outward, this outward-radiating electromagnetic interference signal will also be directly coupled to the driving signal in the display module, resulting in abnormal driving signals. As Figure 5 shown, Figure 5 is a schematic diagram of the influence effect of electromagnetic interference signals on the driving signals of the display module. It can be seen that under the influence of strong coupling signals, the driving signals of the display module will be severely distorted, resulting in abnormal images or abnormal display functions. As Figure 6 shown, Figure 6 is Figure 2 the performance of the shielding circuit shown in Figure 2 in a certain vehicle project. Due to the influence of external electromagnetic interference signals, the display image appears abnormal.

[0040] In view of this, to solve the problem that the above electromagnetic interference signal affects the abnormal display screen, an embodiment of the present invention provides a display module, as Figure 1 , Figure 7 and Figure 8 shown, Figure 7 is Figure 1 a schematic plan view of the back surface of the conductive backplane in Figure 8 is Figure 1 another schematic plan view of the back surface of the conductive backplane in. The display module includes: a display panel 1, a conductive backplane 2 located on the back surface of the display panel 1, and a driving ground line A and a shielding ground line B which are spaced apart and insulated from each other on the side of the conductive backplane 2 away from the display panel 1; wherein, one end of the driving ground line A is electrically connected to the display panel 1, one end of the shielding ground line B is electrically connected to the conductive backplane 2, and the other ends of both the driving ground line A and the shielding ground line B are grounded (GND).

[0041] In the above display module provided by the embodiment of the present invention, by separately arranging the driving ground line for the driving signal used for display inside the display panel and the shielding ground line for shielding electromagnetic interference signals, most of the external electromagnetic interference signals and the electromagnetic interference signals generated by the display module itself are directly released from the shielding ground line, and the amount of signals coupled to the FPC is greatly reduced. Only a very small part of the electromagnetic interference signals enter the driving ground line again, so the influence on the driving signal is greatly reduced. Therefore, the driving signal will not be distorted and will not affect the normal display of the display panel.

[0042] In specific implementation, in the above display module provided by the embodiment of the present invention, as Figure 7 and Figure 8 shown, the driving ground line A includes: a first driving ground line A1 electrically connected to the display panel 1, a second driving ground line A2 electrically connected to the first driving ground line A1, and a grounding end GND electrically connected to the second driving ground line A2; the first driving ground line A1, the second driving ground line A2 and the grounding end GND form the driving ground line A for display inside the display panel 1, that is, the driving ground line A and the line where the driving signal is located form a loop to realize display;

[0043] The shielding ground line B includes: a first shielding ground line B1 electrically connected to the conductive backplane 2, a second shielding ground line B2 electrically connected to the first shielding ground line B1, and a grounding end GND electrically connected to the second shielding ground line B2; the first shielding ground line B1, the second shielding ground line B2 and the grounding end GND form the shielding ground line B for shielding electromagnetic interference signals, which can make the external electromagnetic interference signals and the electromagnetic interference signals generated by the display module itself be released by the shielding ground line B, avoiding affecting the driving signal inside the display panel 1.

[0044] In a specific implementation, in the above display module provided in the embodiment of the present invention, Figure 7 and Figure 8 As shown, the first shielding ground wire B1 is electrically connected to the conductive back plate 2 via a conductive tape 6. Specifically, the material of the conductive tape 6 may include aluminum foil.

[0045] In a specific implementation, in the above display module provided in the embodiment of the present invention, Figure 7 and Figure 8 As shown, the first shielding ground wire B1 is electrically connected to the corresponding second shielding ground wire B2 through the connector 5, and the first driving ground wire A1 is electrically connected to the second driving ground wire A2 through the connector 5. Specifically, one end of the connector 5 is provided with a plurality of first pins 51, and the other end of the connector 5 is provided with a plurality of second pins 52;

[0046] The first shielding ground wire B1 is electrically connected to the corresponding first pin 51, and the second shielding ground wire B2 is electrically connected to the corresponding second pin 52;

[0047] The first driving ground line A1 is electrically connected to the corresponding first pin 51 , and the second driving ground line A2 is electrically connected to the corresponding second pin 52 .

[0048] It should be noted that the structure and connection method of the connector 5 are the same as those in the prior art, and will not be described in detail in the embodiment of the present invention.

[0049] In a specific implementation, in the above display module provided in the embodiment of the present invention, Figure 1 , Figure 7 and Figure 8 As shown, it also includes a flexible circuit board 3 and a printed circuit board 4. The flexible circuit board 3 is used to electrically connect the display panel 1 to the printed circuit board 4, and the printed circuit board 4 is bent through the flexible circuit board 1 to the side of the conductive backplane 2 away from the display panel 1. The printed circuit board 4 provides the display panel 1 with an electrical signal to drive it to realize functions such as display through the lines on the flexible circuit board 3.

[0050] The printed circuit board 4 (PCB, Printed Circuit Board, also known as printed circuit board) of the embodiment of the present invention is a provider of electrical connections for electronic components. Optionally, the printed circuit board 4 may include a substrate and electronic components, drive circuits, etc. integrated on the substrate. The flexible circuit board 3 (FPC, Flexible Printed Circuit, also known as flexible printed circuit board) is a highly reliable and extremely flexible printed circuit board made of polyimide or polyester film as a substrate. The electrical connection between the display panel 1 and the printed circuit board 4 in the display module of the embodiment of the present invention generally adopts the connection method of the flexible circuit board 3. The flexible circuit board 3 can be bound to the display panel 1 to realize the transmission of electrical signals with the display panel 1, and the flexible circuit board 3 and the printed circuit board 4 can be connected by the connector 5 to realize the transmission of electrical signals.

[0051] In a specific implementation, in the above display module provided in the embodiment of the present invention, Figure 1 , Figure 7 and Figure 8 As shown, the flexible circuit board 3 includes: a first substrate 31 arranged on the side of the conductive backplane 2 away from the display panel 1, and a first circuit layer 32 located on the side of the first substrate 31 away from the conductive backplane 2; the first circuit layer 32 includes a first driving ground line A1 and a first shielding ground line B1; that is, the first shielding ground line B1 of the shielding ground line B and the first driving ground line A1 of the driving ground line A are circuits on the FPC, for example, copper wires obtained by etching the entire surface of copper;

[0052] The printed circuit board 4 includes: a second substrate 41 arranged on the side of the conductive backplane 2 away from the display panel 1, a second circuit layer 42 located on the side of the second substrate 41 away from the display panel 1, and a ground terminal GND; the second circuit layer 42 includes a second driving ground line A2 and a second shielding ground line B2; that is, the second shielding ground line B2 of the shielding ground line B and the second driving ground line A2 of the driving ground line A are circuits on the PCB, such as copper wires obtained by etching the entire surface of copper.

[0053] In a specific implementation, the first substrate 31 is a flexible substrate, such as PI (polyimide) and the like; the second substrate 41 is a rigid substrate, such as glass and the like.

[0054] In a specific implementation, in the above display module provided in the embodiment of the present invention, if Figure 7 and Figure 8 As shown, the number of shielding ground lines B can be greater than or equal to one. Figure 7 As shown, the number of shielding ground line B is one. Figure 9 As shown, Figure 9 for Figure 7Schematic diagram of the corresponding shielding ground line B and driving ground line A. When the entire display module undergoes EMC RS (radio frequency radiation) or ESD (electrostatic discharge) tests, in the embodiments of the present invention, the connection method of the shielding ground line for shielding electromagnetic interference signals is as follows: The conductive backplane 2 is electrically connected to the first shielding ground line B1 through the conductive tape 6, then the first shielding ground line B1 is electrically connected to the second shielding ground line B2 through the connector 5, and finally the second shielding ground line B2 is connected to the ground terminal GND. Similarly, the connection method of the driving ground line for display is as follows: The first driving ground line A1 electrically connected to the display panel 1 is electrically connected to the second driving ground line A2 through the connector 5, and finally the second driving ground line A2 is connected to the ground terminal GND. Therefore, by separately arranging the shielding ground line for shielding electromagnetic interference signals and the driving ground line for display, the external electromagnetic interference signals and the electromagnetic interference signals generated by the display module itself can be released by the shielding ground line B, avoiding affecting the driving signals in the display panel 1.

[0055] In specific implementation, in the above display module provided by the embodiments of the present invention, as Figure 8 shown, the number of shielding ground lines B can be two, and the two shielding ground lines B are respectively located on both sides of the driving ground line A. Specifically, the number of the first shielding ground lines B1 is two, and the number of the second shielding ground lines B2 is two. The two first shielding ground lines B1 are respectively located on both sides of the first driving ground line A1, and the two second shielding ground lines B2 are respectively located on both sides of the second driving ground line A2. In this way, by arranging two shielding ground lines B, the electromagnetic interference signals can be released through the two shielding ground lines B. Compared with only arranging one shielding ground line B, the amount of signals coupled to the FPC can be further reduced, further ensuring the stability of the driving signals and improving the picture display quality.

[0056] As Figure 10 shown, Figure 10 is Figure 8 the schematic diagram of the corresponding two shielding ground lines B and driving ground line A, where the connection method of each shielding ground line for shielding electromagnetic interference signals and the connection method of the driving ground line for display are the same as those in Figure 9 , the difference is that Figure 10 it includes two shielding ground lines B, and the connection method of each shielding ground line B and the connection method of the driving ground line can be referred to the relevant description in Figure 9 .

[0057] In specific implementation, the release path of the electromagnetic interference signals of the display module provided by the embodiments of the present invention is as Figure 11As shown in the figure, when the entire display module is subjected to EMC RS or ESD tests, the release path of the electromagnetic interference signal is as follows: the electromagnetic interference signal enters the first shield ground wire B1 on the FPC through the conductive backplane 2, then enters the second shield ground wire B2 on the PCB through the connector 5 from the first shield ground wire B1, and finally is released to the ground terminal GND on the PCB from the second shield ground wire B2. Therefore, when the electromagnetic interference signal enters the conductive backplane 2, the electromagnetic interference signal will not be directly coupled to the driving signal of the display panel 1. Instead, it is first released to the ground terminal GND through the shield ground wire B, and then indirectly conducted with the first driving ground wire A1. In this way, most of the electromagnetic interference signals have been released from the ground terminal GND, and the amount of signal coupled to the FPC is greatly reduced. Only a very small part of the electromagnetic interference signal enters the driving ground line again, so the impact on the driving signal is greatly reduced. Therefore, the driving signal will not be distorted and will not affect the normal display of the display panel. As Figure 12 shown Figure 12 is a schematic diagram of the influence effect of the electromagnetic interference signal on the driving signal of the display module. It can be seen that under the influence of the strong coupling signal, the driving signal of the display module is almost normal. As Figure 13 shown Figure 13 is the performance of the shielded line shown Figure 8 in a certain vehicle project. It can be seen that under the influence of external electromagnetic interference signals, the picture will not show abnormalities.

[0058] It should be noted that in the embodiments of the present invention, one and two shield ground wires B are taken as examples for illustration. Of course, the number of shield ground wires B can also be more, such as three or four. However, other traces need to be set on the PFC. The larger number of shield ground wires B occupies a larger area of the FPC and affects the layout of other traces. Therefore, the embodiments of the present invention preferably use two shield ground wires B, which neither occupy too much area of the FPC nor can effectively release the electromagnetic interference signal.

[0059] It should be noted that in the embodiments of the present invention Figure 7 the first shield ground wire B1 and the second shield ground wire B2 are taken as examples of being located above the first driving ground wire A1 and the second driving ground wire A2. Of course, the first shield ground wire B1 and the second shield ground wire B2 can also be located below the first driving ground wire A1 and the second driving ground wire A2.

[0060] It should be noted that in the embodiments of the present invention Figure 7 and Figure 8The shapes of the first shielding ground wire B1, the second shielding ground wire B2, the first driving ground wire A1, and the second driving ground wire A2 in [description] are only for illustrative purposes. During actual manufacturing, they are not limited to the shapes shown in the present invention. Specifically, they can be set according to the layout space of the traces on the FPC, as long as the driving ground lines and the shielding ground lines can be made with insulating intervals.

[0061] It should be noted that in the embodiments of the present invention Figure 7 and Figure 8 the dimensional ratios of the first shielding ground wire B1, the second shielding ground wire B2, the first driving ground wire A1, and the second driving ground wire A2 in [description], that is, the width ratios of the respective traces, are not limited to the ratios shown in the present invention. Specifically, they can be set according to the layout space of the traces on the FPC.

[0062] It should be noted that in the embodiments of the present invention Figure 7 and Figure 8 the first shielding ground wire B1, the second shielding ground wire B2, the first driving ground wire A1, and the second driving ground wire A2 in [description] are all taken as examples on the side of the substrate away from the conductive backplane 2. Of course, it is not limited to this. For example, the first shielding ground wire B1, the second shielding ground wire B2, the first driving ground wire A1, and the second driving ground wire A2 can also all be on the side of the substrate close to the conductive backplane 2. Or, the first shielding ground wire B1 and the second shielding ground wire B2 are on the side of the substrate away from the conductive backplane 2, and the first driving ground wire A1 and the second driving ground wire A2 are on the side of the substrate close to the conductive backplane 2. Or, the first shielding ground wire B1 and the second shielding ground wire B2 are on the side of the substrate close to the conductive backplane 2, and the first driving ground wire A1 and the second driving ground wire A2 are on the side of the substrate away from the conductive backplane 2.

[0063] Based on the same inventive concept, the embodiments of the present invention also provide a display device, including any one of the above-mentioned display modules provided by the embodiments of the present invention. Since the principle of solving problems of this display device is similar to that of the foregoing display module, the implementation of this display device can refer to the implementation of the foregoing display module, and the repeated parts will not be elaborated. This display device can be: a mobile phone, a tablet computer, a television, a monitor, a laptop computer, a digital photo frame, a navigator, or any product or component with a display function.

[0064] In specific implementation, the display device provided by the embodiments of the present invention can be a liquid crystal display device (LCD) or an organic light-emitting display device (OLED).

[0065] In specific implementation, when the display device provided by the embodiment of the present invention is a liquid crystal display device (LCD), the conductive backplane in the aforementioned display module is the conductive backplane of the backlight module, which is used to carry structures such as a light guide plate. When the display device provided by the embodiment of the present invention is an organic light-emitting display device (OLED), the conductive backplane in the aforementioned display module is the metal support backplane of the OLED, which is used to carry structures such as a display panel.

[0066] A display module and a display device disclosed by an embodiment of the present invention separate the driving ground line for driving signals used for display inside the display panel and the shielding ground line for shielding electromagnetic interference signals. In this way, most of the external electromagnetic interference signals and the electromagnetic interference signals generated by the display module itself are directly released from the shielding ground line, and the amount of signals coupled to the FPC is greatly reduced. Only a very small part of the electromagnetic interference signals enter the driving ground line again, so the influence on the driving signals is greatly reduced. Therefore, the driving signals will not be distorted and will not affect the normal display of the display panel.

[0067] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A display module, characterized in that, Comprising: A display panel, a conductive backplane located on the back of the display panel, a flexible circuit board for electrically connecting the display panel to a printed circuit board, a printed circuit board bent to the side of the conductive backplane away from the display panel through the flexible circuit board, and a driving ground line and a shielding ground line which are spaced apart and insulated on the side of the conductive backplane away from the display panel. The flexible circuit board includes: a first substrate disposed on the side of the conductive backplane away from the display panel, and a first circuit layer located on the side of the first substrate away from the conductive backplane; the first circuit layer includes a first driving ground line and a first shielding ground line. The printed circuit board includes: a second substrate disposed on the side of the conductive backplane away from the display panel, a second circuit layer located on the side of the second substrate away from the display panel, and a grounding terminal; the second circuit layer includes a second driving ground line and a second shielding ground line. The driving ground line includes: a first driving ground line electrically connected to the display panel, a second driving ground line electrically connected to the first driving ground line, and a grounding terminal electrically connected to the second driving ground line. The shielding ground line includes: a first shielding ground line electrically connected to the conductive backplane, a second shielding ground line electrically connected to the first shielding ground line, and the grounding terminal electrically connected to the second shielding ground line; wherein, one end of the driving ground line is electrically connected to the display panel, one end of the shielding ground line is electrically connected to the conductive backplane, and the other ends of the driving ground line and the shielding ground line are both grounded.

2. The display module according to claim 1, wherein The first shielding ground line is electrically connected to the conductive backplane through a conductive adhesive tape.

3. The display module according to claim 1, wherein The first shielding ground line and the second shielding ground line are electrically connected through a connector, and the first driving ground line and the second driving ground line are electrically connected through the connector.

4. The display module according to claim 3, wherein, One end of the connector is provided with a plurality of first pins, and the other end of the connector is provided with a plurality of second pins; The first shielding ground line is electrically connected to the corresponding first pin, and the second shielding ground line is electrically connected to the corresponding second pin; The first driving ground line is electrically connected to the corresponding first pin, and the second driving ground line is electrically connected to the corresponding second pin.

5. The display module according to claim 4, wherein The number of the shielding ground lines is greater than or equal to one.

6. The display module according to claim 5, wherein The number of the shielding ground lines is two, and the two shielding ground lines are respectively located on both sides of the driving ground line.

7. The display module according to claim 6, characterized in that, The number of the first shielding ground lines is two, and the number of the second shielding ground lines is two. The two first shielding ground lines are respectively located on both sides of the first driving ground line, and the two second shielding ground lines are respectively located on both sides of the second driving ground line.

8. A display device, characterized in that, Including the display module according to any one of claims 1 to 7.

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