Electromagnetic shielding net for display screen of nuclear magnetic resonance examination room and display screen thereof
By using copper wire textile on the display screen of the NMR examination room and setting a black non-ferromagnetic conductive layer on its surface, the signal leakage problem of electromagnetic shielding materials in the high-frequency signal environment in the prior art is solved, and excellent electromagnetic shielding effect and optical performance of the display screen are achieved.
Patent Information
- Application Number
- CN202520628331.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2035-04-07
AI Technical Summary
The prior art cannot effectively use electromagnetic shielding materials in the NMR inspection room, resulting in problems such as interference in the equipment's magnetic field and signal leakage.
A wire mesh structure formed by copper wire textile is adopted, with a black non-ferromagnetic conductive layer (such as a chromium layer or a nickel layer) on the surface. This electromagnetic shielding net provides excellent shielding effect in a high-frequency electromagnetic environment while maintaining the transparency and clarity of the display.
It realizes effective shielding in high-frequency electromagnetic environment in the NMR examination room, avoids the equipment's magnetic field absorption and ensures the optical effect of the display screen.
Smart Images
Figure CN222941129U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an electromagnetic shielding net for a display screen in a nuclear magnetic resonance examination room and a display screen thereof, belonging to the technical field of conductive materials and optical devices. Background Art
[0002] When a nuclear magnetic resonance examination device is working, metal objects cannot be carried into or around the device. Otherwise, it will not only interfere with the device's magnetic field, affect the image quality, but even damage the device. For example, the strong magnetic field generated when the nuclear magnetic resonance examination device is working will form electromagnetic interference with the display device for displaying examination images, affecting the normal operation of the nuclear magnetic resonance examination device and the display device. Therefore, currently, only display devices for doctors are equipped, and the display devices for doctors need to be isolated and placed in another room. Another example is that when there are iron objects around the nuclear magnetic resonance examination device, the magnetic field generated during the device's operation will strongly attract the iron objects, causing damage to the device and personnel. Allowing patients to observe the nuclear magnetic resonance examination images in real time during the examination can help patients intuitively understand their condition. Therefore, it is necessary to place a display device for patients to observe the images in the examination room, and the compatibility between the display device and the nuclear magnetic resonance examination device is a problem that must be solved.
[0003] Iron has high electrical conductivity and magnetic permeability and is currently widely used as an electromagnetic shielding material. For example, iron can be made into an electromagnetic shielding wire mesh and installed on the back of the display screen. After the electromagnetic shielding wire mesh is grounded, the purpose of electromagnetic shielding can be achieved. However, in the transmission of high-frequency signals, the electrical conductivity of iron will cause signal leakage, resulting in the loss of shielding effect. Therefore, the iron electromagnetic shielding wire mesh cannot be applied to the nuclear magnetic resonance examination room. Summary of the Utility Model
[0004] The utility model solves the problems existing in the prior art and provides an electromagnetic shielding net for a display screen in a nuclear magnetic resonance examination room and a display screen thereof, which has excellent shielding effect in a high-frequency electromagnetic environment and ensures optical effects such as transparency and clarity of the display screen.
[0005] The utility model realizes the above purpose by adopting the following technical solutions:
[0006] On the one hand, the utility model provides an electromagnetic shielding net for a display screen in a nuclear magnetic resonance examination room, including a wire mesh structure formed by weaving copper wires. A black non-ferromagnetic conductive layer is arranged on the surface of the wire mesh structure, and the black non-ferromagnetic conductive layer is a chromium layer or a nickel layer.
[0007] Preferably, the black non-ferromagnetic conductive layer is formed by electroplating, vacuum plating or magnetron sputtering.
[0008] Preferably, the mesh number of the wire mesh structure is 100 - 300 meshes, and the wire diameter of the copper wire is 30 - 50 μm.
[0009] Preferably, the copper wire is woven in a plain weave form, formed by alternately overlapping the warp and weft threads that are perpendicular to each other.
[0010] On the other hand, the present utility model also provides a display screen, including a liquid crystal display screen and the electromagnetic shielding net described above, and the electromagnetic shielding net is disposed on the back of the liquid crystal display screen.
[0011] The beneficial effects of the present utility model include but are not limited to:
[0012] The electromagnetic shielding net and the display screen provided by the present utility model have excellent shielding effects in a high-frequency electromagnetic environment for the wire mesh structure formed by copper wire weaving, can be reliably applied to a nuclear magnetic resonance examination room, and are prevented from being attracted away by the magnetic field of the nuclear magnetic resonance examination equipment; a chromium layer or a nickel layer in black is provided on the surface of the shielding wire mesh, ensuring the optical effects such as transparency and clarity of the display screen. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:
[0014] Figure 1 is a partial cross-sectional view of the electromagnetic shielding net for a display screen in a nuclear magnetic resonance examination room provided by the present utility model;
[0015] Figure 2 is a schematic structural view of the electromagnetic shielding net for a display screen in a nuclear magnetic resonance examination room provided by the present utility model;
[0016] Figure 3 is a schematic view of the display screen provided by the present utility model;
[0017] Figure 4 is a partial cross-sectional view of the display screen provided by the present utility model;
[0018] In the figures, 100, electromagnetic shielding net; 110, black non-ferromagnetic conductive layer; 121, warp thread; 122, weft thread; 200, liquid crystal display screen. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] To clearly illustrate the technical features of the present solution, the present utility model will be described in detail below through specific embodiments and in conjunction with its drawings.
[0020] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.
[0021] As Figure 1 and Figure 2 shown in, the electromagnetic shielding net 100 for the display screen in the nuclear magnetic resonance examination room provided by the present utility model includes a wire mesh structure formed by weaving copper wires. The mesh number of the wire mesh structure is 100 - 300 meshes, and the wire diameter of the copper wire is 30 - 50 μm.
[0022] A black non-ferromagnetic conductive layer 110 is provided on the surface of the wire mesh structure. The black non-ferromagnetic conductive layer is made of a non-ferromagnetic metal or metal compound, and specifically, a chromium layer or a nickel layer can be used. In a high-frequency electromagnetic interference environment, copper has excellent shielding effect and can be reliably applied to the nuclear magnetic resonance examination room to avoid being attracted away by the magnetic field of the nuclear magnetic resonance examination equipment. The black chromium layer or nickel layer ensures the optical effects such as the transparency and clarity of the display screen.
[0023] Specifically, the black non-ferromagnetic conductive layer is formed by electroplating, vacuum plating or magnetron sputtering.
[0024] The weaving form of the copper wire is plain weave, which is formed by alternately overlapping the warp threads 121 and the weft threads 122 that are perpendicular to each other up and down.
[0025] As Figure 3 and Figure 4 shown in, the display screen provided by the present utility model includes a liquid crystal display screen 200 and the electromagnetic shielding net 100, and the electromagnetic shielding net is arranged on the back of the liquid crystal display screen.
[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0027] In the present utility model, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected", "fixed", etc. 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, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0028] Those not detailed in the present utility model are all well-known technologies to those skilled in the art.
Claims
1. An electromagnetic shielding net for a display screen in a nuclear magnetic resonance examination room, characterized in that: It comprises a wire mesh structure formed by weaving copper wires, wherein a black non-ferromagnetic conductive layer is arranged on the surface of the wire mesh structure, and the black non-ferromagnetic conductive layer is a chromium layer or a nickel layer.
2. The electromagnetic shielding net for display screens in nuclear magnetic resonance examination rooms according to claim 1, characterized in that: The black non-ferromagnetic conductive layer is formed by electroplating, vacuum plating or magnetron sputtering.
3. The electromagnetic shielding net for display screens in nuclear magnetic resonance examination rooms according to claim 1, characterized in that: The mesh number of the wire mesh structure is 100-300 meshes, and the wire diameter of the copper wire is 30-50 μm.
4. The electromagnetic shielding net for display screens in nuclear magnetic resonance examination rooms according to claim 1, characterized in that: The copper wire is woven in a plain weave, formed by alternately stacking warps and wefts perpendicular to each other.
5. A display screen, characterized in that: It comprises a liquid crystal display screen and the electromagnetic shielding net according to any one of claims 1 to 4, wherein the electromagnetic shielding net is arranged on the back of the liquid crystal display screen.