CN117715402A - Electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity - Google Patents
Electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity Download PDFInfo
- Publication number
- CN117715402A CN117715402A CN202311851025.8A CN202311851025A CN117715402A CN 117715402 A CN117715402 A CN 117715402A CN 202311851025 A CN202311851025 A CN 202311851025A CN 117715402 A CN117715402 A CN 117715402A
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- Prior art keywords
- display screen
- metal foil
- electromagnetic
- high voltage
- static electricity
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- Pending
Links
- 230000003068 static effect Effects 0.000 title claims abstract description 48
- 230000005611 electricity Effects 0.000 title claims abstract description 44
- 229910052751 metal Inorganic materials 0.000 claims abstract description 86
- 239000002184 metal Substances 0.000 claims abstract description 86
- 239000011888 foil Substances 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims 5
- 238000000926 separation method Methods 0.000 claims 2
- 238000010030 laminating Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 32
- 239000010410 layer Substances 0.000 description 12
- 238000009413 insulation Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 239000013039 cover film Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/0054—Casings specially adapted for display applications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0067—Devices for protecting against damage from electrostatic discharge
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention 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, wherein 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 touch screen is positioned on the outer side of the display screen, the electromagnetic shielding film is tightly attached to the touch screen, the display screen and the touch screen are both positioned in a metal shell, the periphery of the electromagnetic shielding film is provided with the periphery of a conductor material and is fixedly connected with the periphery of the metal foil shielding cover by 360 degrees, the metal foil shielding cover is arranged on the back surface of the display screen, the periphery of the metal foil shielding cover is fixedly connected with the metal shell by 360 degrees, and the electromagnetic shielding film and the metal foil shielding cover can be used for synthesizing a Faraday cage on the periphery of the display screen. The beneficial effects of the invention are as follows: the display screen can be used for blocking external electromagnetic interference and extra-high voltage static electricity, and the capability of the display screen for protecting the electromagnetic interference and the extra-high voltage static electricity can be greatly improved.
Description
Technical Field
The invention relates to the technical field of static electricity protection, in particular to an electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity.
Background
Electromagnetic shielding technology is a shielding device that uses the properties of electromagnetic waves, and the electromagnetic shielding function is to cut off the propagation path of electromagnetic waves, thereby eliminating interference, and among many means for solving the problem of electromagnetic interference, electromagnetic shielding is the most basic and effective. Electromagnetic waves are the main way of electromagnetic energy propagation, and when the high-frequency circuit works, electromagnetic waves are radiated outwards, so that interference is generated to other adjacent devices. On the other hand, various electromagnetic waves in the space are also induced into the circuit, and cause interference to the circuit. The biggest advantage of using electromagnetic shielding to solve the electromagnetic interference problem is that the normal operation of the circuit is not affected, so that no modification is needed to the circuit.
At present, two main protection measures of the display screen for electromagnetic interference and static electricity are provided, one is to increase a shielding film with high shielding efficiency between the display screen and the touch screen, and the shielding film is in 360-degree annular connection with the metal shell to form a shielding layer; the other is that the metal bracket of the display screen is connected with the metal shell through conductive cloth, and the electromagnetic interference resistance and the antistatic ability of the display screen are improved in a diversion mode.
The two protection measures have good protection on common electromagnetic interference and static electricity, but when the voltage of the static electricity reaches 15kV or above, the display screen is affected by interference, so that transient abnormal phenomena such as screen flashing, screen flower, circulation pause and the like occur, and even the display screen is thoroughly damaged, so that the two main protection measures of the electromagnetic interference and the static electricity of the existing display screen are difficult to meet the demands of people.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the electromagnetic shielding structure for protecting the display screen from the extra-high voltage static electricity, and the electromagnetic shielding film and the metal foil shielding cover which are mutually matched are arranged outside the display screen, so that the external electromagnetic interference and the extra-high voltage static electricity can be blocked for the display screen, the capability of protecting the display screen from the electromagnetic interference and the extra-high voltage static electricity can be greatly improved, and the problem that two main protection measures of the display screen on the electromagnetic interference and the static electricity in the prior art are difficult to meet the demands of people is solved.
The invention provides an electromagnetic shielding structure for protecting an extra-high voltage static electricity of a display screen, which is arranged in an intelligent terminal, wherein the intelligent terminal is internally provided with the display screen, a touch screen and a metal shell, the electromagnetic shielding structure comprises an electromagnetic shielding film and a metal foil shielding cover which are mutually matched, the electromagnetic shielding film is arranged between the display screen and the touch screen and is tightly attached to the front surface of the display screen, the touch screen is positioned on the outer side of the display screen, the electromagnetic shielding film is tightly attached to the touch screen, the display screen and the touch screen are both positioned in the metal shell, the periphery of the electromagnetic shielding film is provided with a conductor material periphery and is fixedly connected with the periphery of the metal foil shielding cover in a 360-degree fixing ring manner, the metal foil shielding cover is arranged on the back surface of the display screen, the periphery of the metal foil shielding cover is fixedly connected with the metal shell in a 360-degree fixing ring manner, and the electromagnetic shielding film and the metal foil shielding cover can be peripherally synthesized into a Faraday cage on the periphery of the display screen, and the Faraday cage can be used for blocking external electromagnetic interference and extra-high voltage static electricity.
According to the invention, the back of the display screen is further provided with an insulating layer and a display driving main board, the display driving main board is fixedly and electrically connected with the back of the display screen, the insulating layer is positioned between the back of the display screen and the metal foil shielding cover, and the insulating layer can prevent the display driving main board, the display screen and the metal foil shielding cover from being electrically connected.
According to the invention, a connector is arranged on the display driving main board, a wire arranging through hole is arranged on the insulating layer, and the wire arranging through hole is matched with the connector.
According to the invention, the periphery of the conductor material on the periphery of the electromagnetic shielding film is a periphery of the metal silver material, and the periphery of the metal silver material is electrically connected with the periphery of the metal foil shielding cover by 360 degrees.
The invention is further improved, and the thickness of the metal foil shielding cover is 0.15mm.
The invention is further improved, and the metal foil shielding cover is made of metal copper.
The invention is further improved, and the metal foil shielding cover is made of magnesium aluminum alloy.
According to the invention, a plurality of threaded through holes are formed in the periphery of the metal foil shielding cover, and the metal foil shielding cover is connected with the metal shell through bolts.
Compared with the prior art, the invention has the beneficial effects that: the invention provides an electromagnetic shielding structure for protecting an extra-high voltage static of a display screen, which is characterized in that an electromagnetic shielding film and a metal foil shielding cover which are mutually matched are arranged outside the display screen, the electromagnetic shielding film and the metal foil shielding cover can be used for synthesizing a perfect Faraday cage on the periphery of the display screen, the Faraday cage can be used for blocking external electromagnetic interference and extra-high voltage static of the display screen, the capability of protecting the display screen from electromagnetic interference and extra-high voltage static can be greatly improved, static up to +/-25 kV can be protected, the sensitivity of the display screen is enhanced, the external radiation intensity of the display screen is reduced, no abnormality occurs in the display screen in an electrostatic test of +/-25 kV, and the problem that two main protection measures of the display screen on electromagnetic interference and static in the prior art are difficult to meet the demands of people is solved.
Drawings
FIG. 1 is a structural diagram of an electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity;
fig. 2 is a structural diagram of an electromagnetic shielding structure for protecting a display screen from ultra-high voltage static electricity.
In the figure, 1-electromagnetic shielding film, 11-conductor material perimeter, 2-metal foil shield, 3-display screen, 32-display drive motherboard, 33-connector, 4-touch screen, 5-metal housing.
Detailed Description
The invention will be described in further detail with reference to the drawings and examples.
As shown in fig. 1-2, the electromagnetic shielding structure for protecting the display screen against ultra-high voltage static electricity is arranged in an intelligent terminal, the display screen 3, the touch screen 4 and the metal shell 5 are further arranged in the intelligent terminal, the electromagnetic shielding structure comprises an electromagnetic shielding film 1 and a metal foil shielding cover 2 which are matched with each other, the electromagnetic shielding film 1 is arranged between the display screen 3 and the touch screen 4 and is tightly attached to the front surface of the display screen 3, the touch screen 4 is positioned on the outer side of the display screen 3, the electromagnetic shielding film 1 is tightly attached to the touch screen 4, the display screen 3 and the touch screen 4 are both positioned in the metal shell 5, the periphery of the electromagnetic shielding film 1 is provided with a conductor material periphery 11 and is fixedly connected with the periphery 360 DEG of the metal foil shielding cover 2, the metal foil shielding cover 2 is arranged on the back surface of the display screen 3, the periphery of the metal foil shielding cover 2 is fixedly connected with the metal shell 360 DEG, in this embodiment, the electromagnetic shielding film 1 and the metal foil shielding cover 2 can be combined with a faraday cage on the periphery of the display screen 3, the faraday cage can be used for blocking external electromagnetic interference and static electricity of the display screen 3, the electromagnetic interference and static electricity can be greatly improved, the sensitivity of the display screen can be greatly improved, the electromagnetic interference can reach plus or minus 25, the static electricity can not reach the static electricity can be greatly, and the abnormal static electricity can be greatly reduced, and the static electricity can not reach 25, and has the capability of protecting the display screen against the ultra-high static electricity. The faraday cage is an electromagnetic shielding structure and consists of a cage body, a high-voltage power supply, a display and a control part, wherein the cage body is communicated with the ground, when the tip of a discharge rod with 10 ten thousand volts of high voltage approaches the cage body, discharge sparks occur, a performer in the cage body cannot get an electric shock even if touching the cage wall by hands to approach the discharge sparks, people or objects in the faraday cage can be well protected against static electricity, and in the embodiment, the electromagnetic shielding film 1 and the metal foil shielding cover 2 can be combined into the faraday cage on the periphery of the display screen 3 so as to protect the display screen.
As shown in fig. 1-2, the back of the display screen 3 is further provided with an insulating layer and a display driving main board 32, the display driving main board 32 is fixedly and electrically connected with 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 driving main board 32, the display screen 3 and the metal foil shielding cover 2 to be electrically connected, the display driving main board is further provided with a connector 33, and the insulating layer is provided with a wire arrangement through hole which is matched with the connector 33. In this embodiment, the insulating layer on the back of the display screen covers all areas on the display driving motherboard and the back of the display screen, and the wire arranging through holes are only formed at the positions corresponding to the positions of the connectors, so that the subsequent wire arranging connection is facilitated.
As shown in fig. 1-2, the periphery 11 of the conductor material around the electromagnetic shielding film 1 is a periphery of a metal silver material, the periphery of the metal silver material is electrically connected with the periphery of the metal foil shielding cover 2 by 360 degrees, the thickness of the metal foil shielding cover 2 is 0.15mm, the material of the metal foil shielding cover 2 is metal copper or magnesium aluminum alloy, a plurality of threaded through holes are formed in the periphery of the metal foil shielding cover 2, and the metal foil shielding cover 2 is in bolted connection with the metal shell 5. In this embodiment, the electronic shielding film is also called an EMI protection film, or a wave absorbing material, and is mainly punched and processed, and then is pressed on a non-adhesive copper-clad plate or a cover film, so that the electromagnetic interference on the internal circuit is reduced or eliminated, the EMI shielding film is composed of a high conductive adhesive layer with an insulating layer, the fpc_emi shielding film has good flexibility and grounding conductivity, the shielding effect is good, and the electromagnetic shielding film is widely applied to circuit electromagnetic shielding of consumer electronic products (smart phones, tablet computers, touch panels, digital cameras, liquid crystal televisions and the like), and is an electromagnetic shielding film with high shielding efficiency, and the periphery of the electromagnetic shielding film is subjected to silver paste brushing treatment, so that the impedance of the electromagnetic shielding film is reduced, and the electromagnetic shielding film and a metal shell are subjected to 360-degree loop connection through a metal foil shielding cover, so that the electromagnetic shielding film and the metal shell are fully electrically connected and contacted, and the lap joint resistance is ensured to be as small as possible. The circumference of the metal foil shielding cover is in 360-degree annular connection with the circumference of the electromagnetic shielding film, the metal foil shielding cover is guaranteed to be in full contact with the circumference of the electromagnetic shielding film, then the metal foil shielding cover is in 360-degree annular connection with the metal shell, meanwhile, the insulation layer is utilized to make insulation treatment between the display driving main board of the display screen and the insulation treatment between the metal shell and the metal foil shielding cover, the metal foil shielding cover is the lowest in copper foil manufacturing cost, the effect is good, the magnesium aluminum alloy CNC (computer numerical control) processing and forming can be adopted, and the manufacturing cost is improved.
According to the electromagnetic shielding structure for protecting the display screen from the extra-high voltage static electricity, the electromagnetic shielding film and the metal foil shielding cover which are matched with each other are arranged outside the display screen, so that a perfect Faraday cage can be synthesized at the periphery of the display screen, the Faraday cage can be used for blocking the external electromagnetic interference and the extra-high voltage static electricity for the display screen, the capability of protecting the display screen from the electromagnetic interference and the extra-high voltage static electricity can be greatly improved, the static electricity of +/-25 kV can be protected, the sensitivity of the display screen is enhanced, the external radiation intensity of the display screen is reduced, no abnormality occurs in the display screen in the static electricity test of +/-25 kV, and the problem that two main protection measures of the display screen on the electromagnetic interference and the static electricity in the prior art are difficult to meet the demands of people is solved.
The above embodiments are preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, which includes but is not limited to the embodiments, and equivalent modifications according to the present invention are within the scope of the present invention.
Claims (8)
1. An electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity is arranged in an intelligent terminal, and the intelligent terminal is internally provided with a display screen, a touch screen and a metal shell, and is characterized in that: including mutually supporting electromagnetic shield membrane and metal foil shield, electromagnetic shield membrane set up in the display screen with between the touch-sensitive screen and with the positive closely laminating of display screen, the touch-sensitive screen is located the display screen outside, electromagnetic shield membrane still with the touch-sensitive screen closely laminates, the display screen the touch-sensitive screen all is located in the metal casing, electromagnetic shield membrane be equipped with conductor material periphery all around and with 360 fixed ring joints all around of metal foil shield, the metal foil shield set up in the back of display screen just the edge all around of metal foil shield with 360 fixed ring joints of metal casing, electromagnetic shield membrane with metal foil shield can be in the outside electromagnetic interference of display screen separation and extra-high voltage static can be done to the faraday cage.
2. The electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity according to claim 1, wherein: the back of display screen still is equipped with insulating layer and display drive mainboard, the display drive mainboard with the fixed electricity in back of display screen is connected, the insulating layer is located the back of display screen with between the metal foil shield, the insulating layer can separation display drive mainboard the display screen with the metal foil shield electricity is connected.
3. The electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity according to claim 2, wherein: the display driving main board is provided with a connector, the insulating layer is provided with a wire arranging through hole, and the wire arranging through hole is matched with the connector.
4. The electromagnetic shielding structure for protecting display screen against extra-high voltage static electricity according to claim 3, wherein: the periphery of the conductor material on the periphery of the electromagnetic shielding film is a periphery of the metal silver material, and the periphery of the metal silver material is electrically connected with the periphery of the metal foil shielding cover by 360 degrees.
5. The electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity according to claim 4, wherein: the thickness of the metal foil shield is 0.15mm.
6. The electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity according to claim 5, wherein: the metal foil shielding cover is made of metal copper.
7. The electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity according to claim 5, wherein: the metal foil shielding cover is made of magnesium aluminum alloy.
8. The electromagnetic shielding structure for protecting display screen against extra-high voltage static electricity according to any one of claims 6 and 7, wherein: the periphery of the metal foil shielding cover is provided with a plurality of threaded through holes, and the metal foil shielding cover is connected with the metal shell through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311851025.8A CN117715402A (en) | 2023-12-29 | 2023-12-29 | Electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311851025.8A CN117715402A (en) | 2023-12-29 | 2023-12-29 | Electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117715402A true CN117715402A (en) | 2024-03-15 |
Family
ID=90155307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311851025.8A Pending CN117715402A (en) | 2023-12-29 | 2023-12-29 | Electromagnetic shielding structure for protecting display screen from extra-high voltage static electricity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117715402A (en) |
-
2023
- 2023-12-29 CN CN202311851025.8A patent/CN117715402A/en active Pending
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