Electromagnetic shielding structure for protecting extra-high voltage static electricity of display screen

Abstract

The utility model provides an electromagnetic shielding structure for protecting extra-high voltage static electricity of a display screen, which comprises an electromagnetic shielding film and a metal foil shielding cover which are matched with each other, and the electromagnetic shielding film is arranged between the display screen and a touch screen and is tightly attached to the front surface of the display screen. The periphery of the electromagnetic shielding film is provided with a conductor material periphery and is in 360-degree fixed ring connection with the periphery of the metal foil shielding cover, the metal foil shielding cover is arranged on the back face of the display screen, the peripheral edge of the metal foil shielding cover is in 360-degree fixed ring connection with the metal shell, and the electromagnetic shielding film and the metal foil shielding cover can form a Faraday cage on the periphery of the display screen. The display screen has the advantages that external electromagnetic interference and extra-high voltage static electricity can be blocked for the display screen, and the electromagnetic interference and extra-high voltage static electricity protection capacity of the display screen can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrostatic protection, in particular to an electromagnetic shielding structure for protecting ultra-high voltage static electricity of a display screen. Background Art

[0002] Electromagnetic shielding technology is a shielding device that uses the properties of electromagnetic waves. The function of electromagnetic shielding is to cut off the propagation path of electromagnetic waves, thereby eliminating interference. Among the many means of solving electromagnetic interference problems, electromagnetic shielding is the most basic and effective. Electromagnetic waves are the main way of electromagnetic energy propagation. When high-frequency circuits are working, they will radiate electromagnetic waves outward and interfere with other nearby devices. On the other hand, various electromagnetic waves in space will also be induced into the circuit and interfere with the circuit. The biggest advantage of using electromagnetic shielding to solve the electromagnetic interference problem is that it will not affect the normal operation of the circuit, so there is no need to make any modifications to the circuit.

[0003] At present, there are two main protection measures for display screens against electromagnetic interference and static electricity. One is to add a shielding film with high shielding efficiency between the display screen and the touch screen. The shielding film is connected to the metal casing 360 degrees to form a shielding layer. The other is to connect the metal bracket of the display screen to the metal casing through conductive cloth, thereby improving the anti-electromagnetic interference and anti-static capabilities of the display screen by diversion.

[0004] These two protective measures have good protection against general electromagnetic interference and static electricity. However, when the voltage of static electricity reaches 15kV or above, the display screen will be affected by the interference, and then there will be abnormal phenomena such as short-term screen flicker, screen flower, cycle pause, etc., and even the display screen will be completely damaged. Therefore, the two main protection measures for existing display screens against electromagnetic interference and static electricity are difficult to meet people's needs. Utility Model Content

[0005] In order to solve the problems in the prior art, the utility model provides an electromagnetic shielding structure for protecting display screens from ultra-high voltage static electricity. By arranging an electromagnetic shielding film and a metal foil shielding cover that cooperate with each other outside the display screen, the display screen can be shielded from external electromagnetic interference and ultra-high voltage static electricity, and the ability of the display screen to protect against electromagnetic interference and ultra-high voltage static electricity can be greatly improved, solving the problem in the prior art that the two main protection measures for display screens against electromagnetic interference and static electricity are difficult to meet people's needs.

[0006] The utility model provides an electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity, which is arranged in an intelligent terminal. The intelligent terminal is also provided with a display screen, a touch screen and a metal shell, including an electromagnetic shielding film and a metal foil shielding cover that cooperate with each other. The electromagnetic shielding film is arranged between the display screen and the touch screen and is tightly fitted with the front side of the display screen. The electromagnetic shielding film is provided with a conductor material periphery around it and is fixedly connected with the metal foil shielding cover at 360° around it. The metal foil shielding cover is arranged on the back side of the display screen and the edges of the metal foil shielding cover are fixedly connected with the metal shell at 360°. The electromagnetic shielding film and the metal foil shielding cover can form a Faraday cage around the display screen, and the Faraday cage can block external electromagnetic interference and ultra-high voltage static electricity for the display screen.

[0007] The utility model is further improved in that an insulating layer and a display driver mainboard are further provided on the back of the display screen, the display driver mainboard is fixedly electrically connected to the back of the display screen, the insulating layer is located between the back of the display screen and the metal foil shielding cover, and the insulating layer can block the electrical connection between the display driver mainboard, the display screen and the metal foil shielding cover.

[0008] The utility model is further improved in that the display driving mainboard is provided with a connector, the insulating layer is provided with a wiring through hole, and the wiring through hole is adapted to the connector.

[0009] The utility model is further improved in that the conductor material around the electromagnetic shielding film is a metal silver material, and the metal silver material is electrically connected to the metal foil shielding cover at 360 degrees.

[0010] The utility model is further improved in that the thickness of the metal foil shielding cover is 0.15 mm.

[0011] The utility model is further improved in that the material of the metal foil shielding cover is metal copper.

[0012] The utility model is further improved in that the material of the metal foil shielding cover is magnesium-aluminum alloy.

[0013] The utility model is further improved in that a plurality of threaded through holes are provided around the metal foil shielding cover, and the metal foil shielding cover is connected to the metal shell with bolts.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides an electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity. By arranging an electromagnetic shielding film and a metal foil shielding cover that cooperate with each other outside the display screen, the electromagnetic shielding film and the metal foil shielding cover can synthesize a perfect Faraday cage on the periphery of the display screen. The Faraday cage can block external electromagnetic interference and ultra-high voltage static electricity for the display screen, and can greatly improve the ability of the display screen to protect against electromagnetic interference and ultra-high voltage static electricity. It can protect against static electricity up to ±25kV, enhances the sensitivity of the display screen, and reduces the external radiation intensity of the display screen. In the ±25kV static electricity test, the display screen did not show any abnormality, which solves the problem in the prior art that the two main protection measures for the display screen against electromagnetic interference and static electricity are difficult to meet people's needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the electromagnetic shielding structure for protecting the display screen from ultra-high voltage static electricity of the utility model;

[0016] Figure 2 This is a structural diagram of the electromagnetic shielding structure for protecting display screens from ultra-high voltage static electricity according to the utility model.

[0017] In the figure, 1-electromagnetic shielding film, 11-conductor material periphery, 2-metal foil shielding cover, 3-display screen, 32-display driver mainboard, 33-connector, 4-touch screen, 5-metal casing. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1-2As shown, the utility model provides an electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity, which is arranged in an intelligent terminal. The intelligent terminal is also provided with a display screen 3, a touch screen 4 and a metal shell 5, including an electromagnetic shielding film 1 and a metal foil shielding cover 2 that cooperate with each other. The electromagnetic shielding film 1 is arranged between the display screen 3 and the touch screen 4 and is tightly fitted with the front of the display screen 3. The electromagnetic shielding film 1 is provided with a conductor material periphery 11 around it and is fixedly connected with the metal foil shielding cover 2 around it at 360°. The metal foil shielding cover 2 is arranged on the back of the display screen 3 and the edges of the metal foil shielding cover 2 are fixedly connected with the metal shell at 360°. In this embodiment, the electromagnetic shielding film 1 and the metal foil shielding cover 2 can be combined into a Faraday cage on the periphery of the display screen 3. The Faraday cage can block external electromagnetic interference and ultra-high voltage static electricity for the display screen 3, which can greatly improve the ability of the display screen to protect against electromagnetic interference and ultra-high voltage static electricity, can protect against static electricity up to ±25kV, enhance the sensitivity of the display screen, and reduce the external radiation intensity of the display screen. In the ±25kV static electricity test, the display screen did not show any abnormality. Among them, the Faraday cage is an electromagnetic shielding structure, which is composed of a cage body, a high-voltage power supply, a display and a control part. The cage body is connected to the ground. When the tip of the discharge rod with a high voltage of 100,000 volts approaches the cage body, a discharge spark appears. At this time, the performer in the cage will not be electrocuted even if he touches the cage wall with his hand to approach the discharge spark. People or objects in the Faraday cage can get good static protection. In this embodiment, the electromagnetic shielding film 1 and the metal foil shielding cover 2 can form a Faraday cage around the display screen 3 to protect the display screen.

[0020] like Figure 1-2 As shown, the back of the display screen 3 is also provided with an insulating layer and a display driver mainboard 32, the display driver mainboard 32 is fixedly electrically connected to the back of the display screen 3, the insulating layer is located between the back of the display screen 3 and the metal foil shielding cover 2, the insulating layer can block the display driver mainboard 32, the display screen 3 and the metal foil shielding cover 2 from being electrically connected, the display driver mainboard is also provided with a connector 33, the insulating layer is provided with a cable through hole, and the cable through hole is adapted to the connector 33. In this embodiment, the insulating layer on the back of the display screen covers the display driver mainboard and all areas on the back of the display screen, and only the cable through hole is opened at the corresponding position of the connector to facilitate subsequent cable connection.

[0021] like Figure 1-2As shown, the conductor material periphery 11 around the electromagnetic shielding film 1 is a metal silver material periphery, and the metal silver material periphery is electrically connected to the metal foil shielding cover 2 around 360°. The thickness of the metal foil shielding cover 2 is 0.15mm, and the material of the metal foil shielding cover 2 is metal copper or magnesium-aluminum alloy. A plurality of threaded through holes are opened around the metal foil shielding cover 2, and the metal foil shielding cover 2 is bolted to the metal shell 5. In this embodiment, the electronic shielding film is also called EMI protective film, or absorbing material. It is mainly punched and pressed onto a non-glue copper-clad laminate or a covering film to weaken or eliminate electromagnetic interference on the internal circuit. The EMI shielding film is composed of a highly conductive adhesive layer with an insulating layer. The FPC_EMI shielding film has good flexibility and grounding conductivity, and has a good shielding effect. It is widely used in electromagnetic shielding of consumer electronic products (smartphones, tablet computers, touch panels, digital cameras, LCD TVs, etc.). The electromagnetic shielding film in this embodiment is an electromagnetic shielding film with high shielding efficiency. The electromagnetic shielding film is treated with silver paste on all sides to reduce the impedance of the electromagnetic shielding film. The electromagnetic shielding film and the metal casing are connected 360 degrees through a metal foil shielding cover to ensure that the electromagnetic shielding film and the metal casing are fully electrically connected and in contact, and the lap resistance is as small as possible. The metal foil shielding cover is connected to the electromagnetic shielding film at 360 degrees to ensure that the metal foil shielding cover is in full contact with the electromagnetic shielding film at all sides. The metal foil shielding cover is then connected to the metal shell at 360 degrees. At the same time, the insulating layer is used to insulate the display driver motherboard of the display screen and the metal shell and the metal foil shielding cover. The metal foil shielding cover uses copper foil for the lowest manufacturing cost and the best effect. It can also be formed by CNC processing of magnesium-aluminum alloy, but the manufacturing cost will increase.

[0022] As can be seen from the above, the utility model provides an electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity. By arranging an electromagnetic shielding film and a metal foil shielding cover that cooperate with each other outside the display screen, the electromagnetic shielding film and the metal foil shielding cover can synthesize a perfect Faraday cage on the periphery of the display screen. The Faraday cage can block external electromagnetic interference and ultra-high voltage static electricity for the display screen, and can greatly improve the ability of the display screen to protect against electromagnetic interference and ultra-high voltage static electricity. It can protect against static electricity up to ±25kV, enhance the sensitivity of the display screen, and reduce the external radiation intensity of the display screen. In the ±25kV electrostatic test, the display screen did not show any abnormality, which solves the problem in the prior art that the two main protection measures for the display screen against electromagnetic interference and static electricity are difficult to meet people's needs.

[0023] The specific implementation methods described above are preferred implementation methods of the present utility model, and are not intended to limit the specific implementation scope of the present utility model. The scope of the present utility model includes but is not limited to the specific implementation methods. All equivalent changes made in accordance with the present utility model are within the protection scope of the present utility model.

Claims

1. An electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity, which is arranged in a smart terminal, wherein a display screen, a touch screen and a metal casing are also arranged in the smart terminal, and is characterized in that: The invention comprises an electromagnetic shielding film and a metal foil shielding cover which cooperate with each other. The electromagnetic shielding film is arranged between the display screen and the touch screen and is tightly attached to the front side of the display screen. The electromagnetic shielding film is provided with a conductor material periphery around it and is fixedly connected with the metal foil shielding cover at 360°. The metal foil shielding cover is arranged on the back side of the display screen and the edges around the metal foil shielding cover are fixedly connected with the metal shell at 360°. The electromagnetic shielding film and the metal foil shielding cover can form a Faraday cage around the display screen, and the Faraday cage can block external electromagnetic interference and ultra-high voltage static electricity for the display screen.

2. The electromagnetic shielding structure for protecting display screen from ultra-high voltage static electricity according to claim 1, characterized in that: An insulating layer and a display driver mainboard are also provided on the back of the display screen. The display driver mainboard is fixedly electrically connected to the back of the display screen. The insulating layer is located between the back of the display screen and the metal foil shielding cover. The insulating layer can block the electrical connection between the display driver mainboard, the display screen and the metal foil shielding cover.

3. The electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity according to claim 2, characterized in that: The display driving mainboard is provided with a connector, and the insulating layer is provided with a wiring through hole, and the wiring through hole is adapted to the connector.

4. The electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity according to claim 3 is characterized in that: The conductive material around the electromagnetic shielding film is a metallic silver material, and the metallic silver material is electrically connected to the metal foil shielding cover at 360°.

5. The electromagnetic shielding structure for protecting display screen from ultra-high voltage static electricity according to claim 4, characterized in that: The thickness of the metal foil shield is 0.15 mm.

6. The electromagnetic shielding structure for protecting display screens from ultra-high voltage static electricity according to claim 5, characterized in that: The metal foil shielding cover is made of metal copper.

7. The electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity according to claim 5, characterized in that: The material of the metal foil shielding cover is magnesium-aluminum alloy.

8. The electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity according to any one of claims 6 or 7, characterized in that: A plurality of threaded through holes are formed around the metal foil shielding cover, and the metal foil shielding cover is connected to the metal shell with bolts.

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