Display screen and vehicle

Abstract

The utility model relates to the technical field of vehicles, and discloses a display screen and a vehicle, the display screen comprises a metal shell, a backlight module, a PCB, a wire core and a shielding layer, and the metal shell is used for being connected with a vehicle frame; the backlight module is installed on the metal shell, and an accommodating space is defined by the backlight module and the metal shell. The PCB is arranged in the accommodating space; one end of the wire core penetrates through the metal shell and is connected with the PCB; the shielding layer and the wire core are coaxially arranged, the outer surface of the wire core is coated with the shielding layer, and the shielding layer is electrically connected with the metal shell. Therefore, interference on the shielding layer can be coupled to the metal shell and discharged through the metal shell and the vehicle frame, the situation that the discharging path of an electromagnetic interference signal of the shielding layer passes through the PCB is avoided, and normal operation of the PCB, the display screen and the vehicle is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and in particular, to a display screen and a vehicle. Background Art

[0002] With the rapid development of electric vehicles, the electronic devices in electric vehicles are increasing continuously. However, due to the increasing density of electronic devices and the diversification of application scenarios, the in-vehicle electromagnetic environment is becoming more and more complex. If electromagnetic interference occurs, it will cause abnormalities in the in-vehicle electronic devices.

[0003] Especially for the display screen in an electric vehicle, its importance is becoming more and more prominent. It is the interaction interface between people and the vehicle and a key component of an intelligent vehicle. With the development of display screen technology, video signals tend to be high-speed and low-voltage, and the anti-interference performance requirements of the system are more stringent.

[0004] However, for the current display screen signal shielding, the shielding layer is directly connected to the ground wire of the system PCB board to achieve the discharge of interference. This results in the discharge path of the interference signal passing through the system's PCB board. Since electromagnetic interference is high-frequency interference, there is a certain parasitic inductance or capacitance on the discharge path, which may cause resonance, or the discharge path includes the key signals of the display screen. Therefore, when the discharge path of the interference signal passes through the PCB board, coupling interference will occur, resulting in abnormal functions of the display screen and affecting the use of the vehicle. Utility Model Content

[0005] To solve the above technical problems, the present application provides a display screen and a vehicle, which avoid the discharge path of the electromagnetic interference signal of the shielding layer passing through the PCB board, ensure the normal operation of the PCB board and the display screen, and thus ensure the normal operation of the vehicle.

[0006] The technical solution adopted by the present application to solve its technical problems is as follows:

[0007] A display screen, comprising:

[0008] A metal shell for connecting to the vehicle frame;

[0009] A backlight assembly installed in the metal shell and jointly enclosing a receiving space with the metal shell;

[0010] A PCB board disposed in the receiving space;

[0011] A wire core, one end of which passes through the metal shell to connect to the PCB board;

[0012] A shielding layer coaxially arranged with the wire core and covering the outer surface of the wire core, and the shielding layer is electrically connected to the metal shell.

[0013] Thus, the interference on the shielding layer can be coupled to the metal housing and discharged through the metal housing and the vehicle frame, avoiding the discharge path of the electromagnetic interference of the shielding layer passing through the PCB board, ensuring the normal operation of the PCB board, and thus ensuring the normal operation of the display screen and the vehicle.

[0014] In some embodiments, the connection area between the shielding layer and the metal housing is annular. The 360° circumferential connection between the shielding layer and the metal housing is realized, improving the electromagnetic compatibility, preventing the electromagnetic field generated by the wire core from interfering with the surrounding environment, and ensuring the normal operation of other devices outside the display screen.

[0015] In some embodiments, a connection hole is provided on the side wall of the metal housing through which the wire core passes, one end of the shielding layer is inserted into the connection hole, and the outer wall of the shielding layer fits with the inner wall of the connection hole. A form of 360° circumferential connection between the shielding layer and the metal housing, realizing 360° circumferential connection through the shielding layer itself and the metal housing.

[0016] In some embodiments, a plurality of first connection lines are circumferentially and uniformly distributed on the outer wall of the shielding layer. One end of the first connection line is connected to the shielding layer, and the other end is connected to the metal housing. The centers of the connection points of the plurality of first connection lines with the metal housing enclose a first circumferential connection circle, and the center of the first circumferential connection circle coincides with the center line of the wire core. Another form of 360° circumferential connection between the shielding layer and the metal housing, realizing 360° circumferential connection between the shielding layer and the metal housing through the first connection lines.

[0017] In some embodiments, an annular clamping seat is sleeved on the outer wall of the shielding layer, and a plurality of clamping buckles are uniformly distributed on the outer wall of the clamping seat. The first connection lines are arranged in one-to-one correspondence with the clamping buckles, and the first connection lines are clamped in the clamping buckles. Facilitating the storage and connection of the first connection lines.

[0018] In some embodiments, one or more second connection lines are provided on the outer wall of the shielding layer. One end of the second connection line is connected to the shielding layer, and the other end is connected to the metal housing;

[0019] The connection points of the plurality of second connection lines with the metal housing enclose a second circumferential connection circle, and the center of the second circumferential connection circle coincides with the center line of the wire core.

[0020] When the above two 360° circumferential connection methods cannot achieve the preset anti-interference effect, the second connection lines are added to further increase the grounding points, so as to achieve the preset anti-interference effect.

[0021] In some embodiments, a through hole is provided in the side wall of the metal housing through which the wire core passes. The diameter of the through hole is larger than the outer diameter of the shielding layer. One end of the shielding layer is inserted into the through hole, and the outer wall of the shielding layer is hermetically connected to the inner wall of the through hole through a sealing ring. The through hole facilitates the installation of the shielding layer. At the same time, a sealing ring is provided between the shielding layer and the through hole, which can prevent the gap between the shielding layer and the through hole from affecting the shielding effect.

[0022] In some embodiments, the diameter of the first circumferential connection circle is D, the diameter of the shielding layer is d, and D = (1.5 - 3)d;

[0023] The number of the first connecting wires is 3 to 15.

[0024] The number of the first connecting wires is correlated with the diameter of the first circumferential connection circle, which can not only ensure that there are enough first connecting wires grounded to achieve a better shielding effect, but also ensure that there is a gap between the first connecting wires and they will not affect each other.

[0025] In some embodiments, a power interface is provided on the PCB board, and a wiring hole is provided on the metal housing. The wiring hole is used for the power cord to pass through so that the power cord is connected to the power interface. This ensures the normal connection between the power cord and the PCB board.

[0026] A vehicle includes:

[0027] A vehicle body, which includes an instrument panel located in the cab; and

[0028] The above-mentioned display screen, and the display screen is installed on the instrument panel.

[0029] Compared with the prior art, a display screen and a vehicle according to an embodiment of the present application have the following beneficial effects: By connecting the metal housing to the vehicle frame, the metal housing is grounded. At the same time, the PCB board is arranged in the receiving space surrounded by the metal housing and the backlight assembly, and a shielding layer is coated on the outer surface of the wire core connecting the PCB board. At the same time, the shielding layer is connected to the metal housing, so that the interference on the shielding layer is coupled to the metal housing and discharged through the metal housing and the vehicle frame, avoiding the discharge path of the electromagnetic interference of the shielding layer passing through the PCB board, ensuring the normal operation of the PCB board, and thus ensuring the normal operation of the display screen and the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic structural diagram of a display screen according to an embodiment of the present application.

[0031] Figure 2 It is a schematic structural diagram of a display screen according to another embodiment of the present application.

[0032] Figure 3 For Figure 2Side view.

[0033] Figure 4 Is a cross-sectional view of the display screen of the present application.

[0034] Wherein: 100 - display screen, 1 - metal housing, 11 - connection hole, 12 - through hole, 13 - wire insertion hole, 2 - PCB board, 21 - power interface, 3 - wire core, 4 - shielding layer, 5 - first connection wire, 6 - first annular connection circle, 7 - clamping seat, 71 - buckle, 8 - sealing ring, 9 - second connection wire, 10 - backlight assembly, 20 - receiving space. Specific embodiments

[0035] The following will further describe in detail the specific embodiments of the present application in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0036] In the present application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] As Figure 1 , 4 shown, a display screen 100 of a preferred embodiment of the present application includes a metal housing 1, a backlight assembly 10, a PCB board 2, a wire core 3 and a shielding layer 4. The metal housing 1 is used to connect to the vehicle frame; the backlight assembly 10 includes a backlight and a liquid crystal display glass, which is installed on the front of the metal housing 1 and jointly encloses a receiving space 20 with the metal housing 1; the PCB board 2 is received in the receiving space 20 and is fixed by connecting to the metal housing 1 and / or the backlight assembly 10, such as bonding, stud connection, etc. One end of the wire core 3 passes through the metal housing 1 and is connected to the PCB board 2 through a high-speed connector, and the other end of the wire core 3 is used to connect to the display screen signal source. The shielding layer 4 is made of metal, is coaxially arranged with the wire core 3, and is coated on the outer surface of the wire core 3. The shielding layer 4 is electrically connected to the metal housing 1.

[0038] The metal housing 1 is set as a shell-like structure with one side open and the middle area sunken. The backlight assembly 10 is assembled at the edge area of the opening, so that the receiving space 20 is formed between the backlight assembly 10 and the metal housing 1. The receiving space 20 is set as a sealed space.

[0039] For the display screen 100 based on the above features, by setting the metal shell 1 to connect to the vehicle frame, the metal shell 1 is grounded. At the same time, the PCB board 2 is arranged in the accommodation space 20 formed by the metal shell 1 and the backlight assembly 10, and a shielding layer 4 is coated on the outer surface of the wire core 3 connecting the PCB board 2. Meanwhile, the shielding layer 4 is connected to the metal shell 1, so that the interference on the shielding layer 4 is coupled to the metal shell 1 and discharged through the metal shell 1 and the vehicle frame, avoiding the discharge path of the electromagnetic interference signal on the shielding layer 4 passing through the PCB board 2, ensuring the normal operation of the PCB board 2, and thus ensuring the normal operation of the display screen 100 and the vehicle. At the same time, the rectification cost of electromagnetic compatibility is also reduced.

[0040] Specifically, based on the original grounding of the shielding layer (the PCB board 2 is grounded, that is, single grounding, which is the prior art and will not be elaborated here), the grounding of the metal shell 1 (double grounding) is added to ensure that the interference signal on the shielding layer 4 is coupled to the metal shell 1 and prevent the interference signal from flowing through the PCB board 2 of the system.

[0041] In this embodiment, the connection area between the shielding layer 4 and the metal shell 1 is annular, thus realizing the 360° annular connection between the shielding layer 4 and the metal shell 1, which can improve electromagnetic compatibility, effectively prevent the line from radiating electromagnetic energy outward, reduce the influence of electromagnetic interference on surrounding devices and systems, and thus improve the electromagnetic compatibility of the entire system; prevent the electromagnetic field generated by the wire core 3 from radiating outward and reduce the interference on the surrounding environment; and can effectively protect other cables or electrical devices from external electromagnetic field interference, ensuring the normal operation of other devices except the display screen 100 and the accuracy of data.

[0042] Specifically, there are various forms of the 360° annular connection between the shielding layer 4 and the metal shell 1:

[0043] Form 1: As Figure 1 shown, in an embodiment, an annular connection hole 11 is provided on the side wall of the metal shell 1 through which the wire core 3 passes. One end of the shielding layer 4 is inserted into the connection hole 11, and the outer wall of the shielding layer 4 is in contact with the inner wall of the connection hole 11, that is, the shielding layer 4 itself realizes the 360° annular connection with the metal shell 1. In this way of connection, there is no hole gap between the metal shell 1 and the connection hole 11, which can enhance the shielding effectiveness of the shielding layer 4.

[0044] Form 2: As Figure 2 、 3As shown, in another embodiment, a plurality of first connection lines 5 are circumferentially and uniformly distributed on the outer wall of the shielding layer 4. One end of each first connection line 5 is connected to the shielding layer 4, and the other end is connected to the metal housing 1. The connection points of the plurality of first connection lines 5 and the metal housing 1 enclose a ring, and this ring is the first ring connection circle 6. The center of the first ring connection circle 6 coincides with the center line of the core 3, thereby forming a structure with 360° ring connection through point intervals. The first connection line 5 and the metal housing 1 can be connected through a quick connector or a high-speed connector, or can be directly welded to the metal housing 1.

[0045] Meanwhile, an annular clamping seat 7 is sleeved on the outer wall of the shielding layer 4. A plurality of elastic buckles 71 are uniformly distributed on the outer wall of the clamping seat 7. The first connection lines 5 are arranged in one-to-one correspondence with the buckles 71, and the first connection lines 5 are clamped in the buckles 71, thereby facilitating the storage and connection of the first connection lines 5.

[0046] In addition, when adopting the method of arranging a plurality of the first connection lines 5, in order to facilitate the installation of the shielding layer 4, a through hole 12 is provided on the outer wall of the metal housing 1 through which the core 3 passes. The diameter of the through hole 12 is larger than the outer diameter of the shielding layer 4, and the shielding layer 4 is passed through the through hole 12. However, although this method facilitates the installation of the shielding layer 4, it will also cause a gap between the shielding layer 4 and the through hole 12. To avoid the influence of this gap on the shielding effect, the outer wall of the shielding layer 4 and the inner wall of the through hole 12 are hermetically connected through a sealing ring 8. Specifically: a sealing ring 8 can be provided between the outer wall of the shielding layer 4 and the inner wall of the through hole 12 for hermetic connection; or, a sealing ring 8 is provided on the outer wall of the shielding layer 4. The sealing ring 8 is sleeved on the outer wall of the shielding layer 4 and covers the outside of the through hole 12, and the outer diameter of the sealing ring 8 is larger than the diameter of the through hole. Thereby, the hole gap caused by the coaxial cable passing through the metal housing 1 can be removed, and the shielding efficiency of the metal housing 1 can be enhanced.

[0047] In this embodiment, if the diameter of the first ring connection circle 6 is D and the diameter of the shielding layer 4 is d, then D = (1.5 - 3)d, such as 1.6d, 1.7d, 1.8d, 1.9d, 2d, 2.1d, 2.2d, 2.3d, 2.4d, 2.5d, 2.6d, 2.7d, 2.8d, 2.9d, etc., or any value or any range between any two adjacent values above. Generally, the number of the first connection lines 5 is 3 - 15, and specifically, it also needs to be determined according to the diameter of the first ring connection circle 6 to ensure that there is a spacing between two adjacent first connection lines 5 and they will not affect each other.

[0048] As for which of the above 360° loop connection methods to specifically adopt, it is mainly selected according to the structure and performance of the display device. Since different devices have different anti-interference capabilities, the shielding loop connection methods adopted can also be different. Specifically, it is based on the anti-interference ability of the display screen 100 being more than ten times greater after setting double grounding (i.e., adding the grounding of the metal shell 1 in this application) than when only setting single grounding.

[0049] However, if the anti-interference effect of more than ten times cannot be achieved by adopting the above two 360° loop connection methods, it is necessary to further increase the grounding points. For example, a second connecting wire 9 is provided on the outer wall of the shielding layer 4. One end of the second connecting wire 9 is connected to the shielding layer 4, and the other end is connected to the metal shell 1. Generally speaking, when the ESD (electrostatic discharge) energy is small and the anti-interference ability of the internal circuit structure of the display screen is relatively strong, only adding one grounding point can achieve the protection purpose.

[0050] If adding one such second connecting wire 9 still cannot achieve the above anti-interference ability, multiple second connecting wires 9 can be provided on the outer wall of the shielding layer 4. The multiple second connecting wires 9 can be directly connected to any position of the metal shell 1 instead of being loop-connected, but loop connection is preferably adopted. Specifically, the connection points of the multiple second connecting wires 9 and the metal shell 1 enclose a circular ring, and this circular ring is the second loop connection circle. The center of the second loop connection circle coincides with the center line of the wire core 3.

[0051] When the second connecting wire 9 is connected in a loop connection manner, an annular clamping seat can be sleeved on the outer wall of the shielding layer 4. Clasps are evenly arranged on the outer wall of the clamping seat. The second connecting wire 9 is arranged corresponding to the clasps one by one, and the second connecting wire 9 is clamped in the clasps.

[0052] As Figure 4 shown, in this embodiment, a power interface 21 is provided on the PCB board 2, and a wire insertion hole 13 is provided on the back of the metal shell 1. The wire insertion hole 13 is used for the power cord to pass through so that the power cord is connected to the power interface 21. At the same time, to avoid the wire insertion hole 13 affecting the shielding effect, the power cord and the wire insertion hole 13 need to be sealed.

[0053] In addition, it should be noted that the front and back of the above metal shell 1 are determined based on the orientation of the display screen 100 during actual use. After the display screen 100 is installed, the side facing the vehicle driver is the front, and the side opposite to the front is the back.

[0054] To solve the above technical problems, the present application also provides a vehicle, including a vehicle body and the above display screen 100. The vehicle body includes an instrument panel located in the cab, and the display screen 100 is installed on the instrument panel.

[0055] For a vehicle based on the above features, it is possible to prevent the electromagnetic interference discharge path of the shielding layer 4 from passing through the PCB board 2, ensuring the normal operation of the PCB board 2 and thus ensuring the normal operation of the vehicle.

[0056] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. A display screen, characterized in that: include: Metal housing for connecting to the frame; A backlight assembly is mounted on the metal housing and encloses a receiving space together with the metal housing; A PCB board is arranged in the receiving space; A wire core, one end of which passes through the metal shell and is connected to the PCB board; The shielding layer is coaxially arranged with the wire core and covers the outer surface of the wire core. The shielding layer is electrically connected to the metal shell.

2. The display screen according to claim 1, characterized in that: The connection area between the shielding layer and the metal shell is annular.

3. The display screen according to claim 2, wherein: A connecting hole is arranged on the side wall of the metal shell through which the wire core passes, one end of the shielding layer is inserted into the connecting hole, and the outer wall of the shielding layer is in contact with the inner wall of the connecting hole.

4. The display screen according to claim 2, wherein: A plurality of first connecting wires are evenly distributed on the outer wall of the shielding layer in a circumferential direction, one end of the first connecting wire is connected to the shielding layer, and the other end is connected to the metal shell, and the centers of the connection points of the plurality of first connecting wires and the metal shell form a first ring-connected circle, and the center of the first ring-connected circle coincides with the center line of the wire core.

5. The display screen according to claim 4, characterized in that: The outer wall of the shielding layer is sleeved with an annular clamping seat, and the outer wall of the clamping seat is evenly distributed with a plurality of buckles. The first connecting wires are arranged in a one-to-one correspondence with the buckles, and the first connecting wires are clamped in the buckles.

6. The display screen according to claim 3 or 4, characterized in that: The outer wall of the shielding layer is provided with one or more second connecting wires, one end of the second connecting wire is connected to the shielding layer, and the other end is connected to the metal shell; The connection points of the plurality of second connecting wires and the metal shell form a second connecting circle, and the center of the second connecting circle coincides with the center line of the wire core.

7. The display screen according to claim 4, characterized in that: A through hole is provided on the side wall of the metal shell for the wire core to pass through, the diameter of the through hole is larger than the outer diameter of the shielding layer, one end of the shielding layer is passed through the through hole, and the outer wall of the shielding layer and the inner wall of the through hole are sealed and connected via a sealing ring.

8. The display screen according to claim 4, characterized in that: The diameter of the first annular circle is D, the diameter of the shielding layer is d, and D=(1.5-3)d; The number of the first connecting wires is 3 to 15.

9. The display screen according to any one of claims 1 to 5, characterized in that: The PCB board is provided with a power interface, and the metal shell is provided with a wire insertion hole, and the wire insertion hole is used for the power line to pass through so that the power line is connected to the power interface.

10. A vehicle, characterized in that: include: a vehicle body, which includes an instrument panel located within the cab; as well as The display screen as described in any one of claims 1 to 9, wherein the display screen is mounted on the instrument panel.

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