CN115148115A - Lightning-proof LED screen for outdoor advertising board - Google Patents

Lightning-proof LED screen for outdoor advertising board Download PDF

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Publication number
CN115148115A
CN115148115A CN202110885970.4A CN202110885970A CN115148115A CN 115148115 A CN115148115 A CN 115148115A CN 202110885970 A CN202110885970 A CN 202110885970A CN 115148115 A CN115148115 A CN 115148115A
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CN
China
Prior art keywords
lightning
display screen
aluminum alloy
control panel
led screen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110885970.4A
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Chinese (zh)
Inventor
孙先洁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Lide Zhichuang Technology Co ltd
Original Assignee
Wuhan Lide Zhichuang Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Lide Zhichuang Technology Co ltd filed Critical Wuhan Lide Zhichuang Technology Co ltd
Priority to CN202110885970.4A priority Critical patent/CN115148115A/en
Publication of CN115148115A publication Critical patent/CN115148115A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66Connections with the terrestrial mass, e.g. earth plate, earth pin
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01TSPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T19/00Devices providing for corona discharge
    • H01T19/04Devices providing for corona discharge having pointed electrodes
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/02Details
    • H05K5/0217Mechanical details of casings
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00Casings, cabinets or drawers for electric apparatus
    • H05K5/06Hermetically-sealed casings
    • H05K5/061Hermetically-sealed casings sealed by a gasket held between a removable cover and a body, e.g. O-ring, packing

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

The invention discloses a lightning-proof LED screen for an outdoor billboard, which comprises a display screen, wherein a trapezoidal rubber ring is arranged outside the display screen, and an aluminum alloy shell is connected outside the trapezoidal rubber ring; the rear shell is fixedly arranged at the rear end of the aluminum alloy shell, a screw hole is formed in the surface of the rear shell, and a screw is arranged inside the screw hole; the back plate frame is fixedly installed outside the aluminum alloy shell, a channel steel is vertically installed on the surface of the back plate frame, and a square pipe is vertically arranged on the surface of the channel steel. This lightning protection's outdoor LED screen for bill-board compares with current device, is convenient for seal the protection with the display screen rear end through the use of aluminum alloy housing, trapezoidal rubber circle and backshell, avoids the sunlight to insolate and the inside display screen that leads to of rainwater invasion to damage, increases use cost, through the use of lightning protection device, and its fixed mounting prevents that thunderstorm weather from puncturing the control panel and leading to the damage, shortens the life of control panel.

Description

Lightning-proof LED screen for outdoor advertising board
Technical Field
The invention relates to the technical field of LED screens, in particular to an LED screen for an outdoor advertising board with lightning protection.
Background
Because the LED display screen has the advantages of high brightness, low power consumption, etc. and is widely used in various social fields, the development prospect of the LED is very wide, and is developing towards higher brightness, higher weather resistance, higher luminous density, and reliability, the LED display screen for outdoor advertisement is a display screen for displaying various information such as characters, figures, images, animations, quotations, videos, video signals, etc., the LED display screen has been widely applied to large squares, commercial advertisements, stadiums, information dissemination, news distribution, securities trading, etc., the current LED display screen for outdoor advertisement has been very popular, but the current LED display screen for outdoor advertisement has no added protective measures, the LED display screen is exposed to the outside for a long time, is easily damaged by sunlight exposure and rainwater invasion, and is easily damaged by flapping or impact, and meanwhile, the current LED display screen for outdoor advertisement does not have the function of lightning protection, and is easily damaged by lightning attack in the weather.
The current LED screen that is used for outdoor advertising does not increase safeguard measure, and the LED screen is exposed to the external world for a long time, receives the sunlight to insolate easily and the rainwater invasion damages to and the current LED display screen that is used for outdoor advertising does not possess the function of lightning protection, and at thunder and lightning weather, the LED screen easily suffers the problem that the thunder and lightning struck the damage, for this reason, we propose the outdoor advertising tablet of lightning protection and use the LED screen.
Disclosure of Invention
The invention aims to provide an LED screen for a lightning-proof outdoor advertising board, and aims to solve the problems that the existing LED screen for the outdoor advertising is exposed to the outside for a long time and is easily damaged by sunlight exposure and rainwater invasion because no protective measures are added, and the existing LED display screen for the outdoor advertising is not provided with a lightning-proof function and is easily damaged by lightning attack in lightning weather.
In order to achieve the purpose, the invention provides the following technical scheme: lightning-proof's outdoor LED screen for bill-board includes:
the display screen is characterized in that a trapezoidal rubber ring is arranged outside the display screen, and an aluminum alloy shell is connected outside the trapezoidal rubber ring;
the rear shell is fixedly arranged at the rear end of the aluminum alloy shell, a screw hole is formed in the surface of the rear shell, and a screw is arranged in the screw hole;
the control panel is fixedly arranged on one side of the display screen, and a lightning protection device is arranged on the surface of the control panel;
the back plate frame is fixedly installed outside the aluminum alloy shell, a channel steel is vertically installed on the surface of the back plate frame, and a square tube is vertically arranged on the surface of the channel steel.
Preferably, the aluminum alloy shell forms a sealing structure through the trapezoidal rubber ring and the display screen, and the trapezoidal rubber ring is tightly attached to the aluminum alloy shell.
Preferably, the control panel is electrically connected with the display screen, and the lightning protection device is electrically connected with the control panel.
Preferably, the back plate frame forms a half-surrounding structure through a channel steel and a square pipe, and the channel steel is perpendicular to the square pipe.
Preferably, the backplate frame is further provided with:
the rain shield is arranged at the top of the back plate frame, and a flow guide groove is formed in the surface of the rain shield;
a lightning rod disposed above the rain shield;
the galvanized steel pipe is installed at the bottom of the back plate frame, the tail end of the galvanized steel pipe is connected with an earth burying end, and the periphery of the earth burying end is provided with a ground;
and the artificial grounding grid is fixedly arranged below the buried end.
Preferably, the rain shield and the back plate frame are welded, and the flow guide grooves are uniformly distributed along the surface of the rain shield.
Preferably, the lightning rod is symmetrical with respect to the rain shield, and the galvanized steel pipe and the buried end are of an integrated structure.
Compared with the prior art, the invention provides the LED screen for the lightning-proof outdoor billboard, which has the following beneficial effects: this outdoor advertising tablet of lightning protection electricity is shielded LED and is effectively protected the control panel through the use of lightning protection device, avoids damaging the control panel at outdoor thunderbolt, uses the lightning rod as the lightning equipment simultaneously, recycles galvanized steel pipe and buries the ground end and be earthing device, and the additional use artificial earth net effectively improves the lightning protection electricity measure in addition.
1. According to the invention, the rear end of the display screen is conveniently sealed and protected by using the aluminum alloy shell, the trapezoidal rubber ring and the rear shell, the damage of the display screen caused by sunlight exposure and rainwater invasion into the interior is avoided, the use cost is increased, the lightning protection device is fixedly arranged on the control panel by using the lightning protection device, the damage caused by the lightning weather puncturing the control panel is prevented, and the service life of the control panel is shortened;
2. according to the invention, the channel steel and the square tube are vertically arranged and welded with the back plate frame to form the protective cover, so that the display screen is conveniently protected, the installation is stable, the unstable installation caused by the swinging of the display screen in the air is avoided, the protective measures are effectively increased by using the rain baffle, the long-term exposure of the LED screen to the outside is reduced, the sunlight exposure and rainwater invasion damage are reduced, the rainwater is guided to the two sides through the guide grooves, and the display screen advertisement playing definition that the front end can be shielded by rainwater is reduced;
3. the lightning rod is used as lightning receiving equipment, the galvanized steel pipe and the buried end are used as grounding devices, and an artificial grounding network is additionally used to effectively improve lightning protection measures, avoid lightning accidents in thunderstorm weather and improve lightning protection measures.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the aluminum alloy housing and the trapezoidal rubber ring structure of the present invention;
FIG. 3 is a schematic view of the display screen and control panel of the present invention;
FIG. 4 is a schematic plan view of the present invention;
fig. 5 is a schematic rear view of the present invention.
In the figure: 1. a display screen; 2. a trapezoidal rubber ring; 3. an aluminum alloy housing; 4. a lightning protection device; 5. a rear housing; 6. a screw hole; 7. a screw; 8. a backboard frame; 9. channel steel; 10. a square tube; 11. a rain shield; 12. a diversion trench; 13. a lightning rod; 14. galvanized steel pipe; 15. a ground surface; 16. burying a ground end; 17. an artificial grounding grid; 18. and a control panel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
As shown in fig. 1 to 3 and 5, the LED panel for outdoor signboard for lightning protection includes: the display screen comprises a display screen 1, wherein a trapezoidal rubber ring 2 is arranged outside the display screen 1, and an aluminum alloy shell 3 is connected outside the trapezoidal rubber ring 2; the rear shell 5 is fixedly installed at the rear end of the aluminum alloy shell 3, a screw hole 6 is formed in the surface of the rear shell 5, a screw 7 is installed inside the screw hole 6, the aluminum alloy shell 3 forms a sealing structure with the rear shell 5 through the trapezoidal rubber ring 2 and the display screen 1, the trapezoidal rubber ring 2 is tightly attached to the aluminum alloy shell 3, the rear end of the display screen 1 is conveniently sealed and protected through the aluminum alloy shell 3, the trapezoidal rubber ring 2 and the rear shell 5, the damage of the display screen 1 caused by the fact that sunlight is exposed and rainwater invades the inside is avoided, and the use cost is increased; the control panel 18 is fixedly arranged on one side of the display screen 1, the lightning protection device 4 is arranged on the surface of the control panel 18, the control panel 18 is electrically connected with the display screen 1, the lightning protection device 4 is electrically connected with the control panel 18, and the control panel 18 is fixedly arranged on the control panel 18 through the use of the lightning protection device 4, so that the control panel 18 is prevented from being damaged due to lightning weather breakdown, and the service life of the control panel 18 is shortened; backplate frame 8, its fixed mounting is in aluminum alloy housing 3's outside, backplate frame 8's surface vertical installs channel-section steel 9, channel-section steel 9's surface vertical is provided with square pipe 10, backplate frame 8 passes through channel-section steel 9 and manages between the pipe 10 and constitute half surrounding structure, mutually perpendicular between channel-section steel 9 and the square pipe 10, set up through channel-section steel 9 and square pipe 10 is perpendicular and backplate frame 8 welds, form a safety cover, be convenient for protect display screen 1, make its installation stable, avoid it to rock in the air, lead to the installation unstability.
As shown in fig. 1 and 4 to 5, the LED screen for outdoor signboard for lightning protection includes: the rain shield 11 is arranged at the top of the back plate frame 8, the surface of the rain shield 11 is provided with the flow guide grooves 12, the rain shield 11 and the back plate frame 8 are welded, the flow guide grooves 12 are uniformly distributed along the surface of the rain shield 11, protective measures are effectively increased through the use of the rain shield 11, the long-term exposure of the LED screen to the outside is reduced, sunlight exposure and rainwater invasion damage are reduced, rainwater is guided to two sides through the flow guide grooves 12, and the advertisement playing definition of the display screen 1, which can be shielded by rainwater, at the front end is reduced; a lightning rod 13 disposed above the rain shield 11; the galvanized steel pipe 14 is installed at the bottom of the back plate frame 8, the tail end of the galvanized steel pipe 14 is connected with an earth burying end 16, and the ground 15 is arranged around the earth burying end 16; artifical ground net 17, its fixed setting is in the below of burying ground end 16, and lightning rod 13 is about weather shield 11 mutual symmetry, galvanized steel pipe 14 with bury ground end 16 formula structures as an organic whole, through using lightning rod 13 as the lightning equipment that connects, recycle galvanized steel pipe 14 and bury ground end 16 and be earthing device, in addition add to use artifical ground net 17 effectively to improve lightning protection electric measure, avoid thunder and rain weather thunderbolt accident, improve lightning protection measure.
In summary, when the lightning protection outdoor billboard LED screen is used, firstly, the display screen 1 and the control panel 18 are sealed and protected by the aluminum alloy shell 3, the trapezoidal rubber ring 2 and the rear shell 5, and then fixed by the screw 7 penetrating through the screw hole 6, so as to prevent the display screen 1 from being damaged due to sunlight exposure and rainwater invasion, and increase the use cost, wherein the control panel 18 is installed with the lightning protection device 4 (type: B365 MHC) for signal lightning protection, so as to effectively prevent equipment from being damaged due to lightning stroke, and shorten the service life of the control panel 18, and further, the lightning rod 13 is used as a lightning receiving device, and the galvanized steel pipe 14 and the buried end 16 are used as grounding devices, and the artificial grounding net 17 is additionally used to effectively improve lightning protection measures, the buried end 16 and the artificial grounding net 17 are buried on the ground 15 to a depth of about 1 meter, so as to avoid weather accidents, improve the lightning protection measures, and then the display screen 1 is installed on the back plate frame 8, and is vertically arranged with the square pipe 10 to be welded with the protection frame 8 to form a protection cover, so as to reduce rainwater invasion of the display screen 1, and to reduce rainwater invasion, and rainwater invasion of the display screen 1 can be clearly shielded by rainwater, and the display screen can be clearly shielded by the lightning stroke.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. LED screen for outdoor advertising board of lightning protection, its characterized in that includes:
the display screen comprises a display screen (1), wherein a trapezoidal rubber ring (2) is arranged outside the display screen (1), and an aluminum alloy shell (3) is connected outside the trapezoidal rubber ring (2);
the rear shell (5) is fixedly arranged at the rear end of the aluminum alloy shell (3), a screw hole (6) is formed in the surface of the rear shell (5), and a screw (7) is arranged in the screw hole (6);
a control panel (18) fixedly mounted on one side of the display screen (1), the surface of the control panel (18) is provided with a lightning protector (4);
backplate frame (8), its fixed mounting be in the outside of aluminum alloy housing (3), channel-section steel (9) are installed to the perpendicular surface of backplate frame (8), the perpendicular surface of channel-section steel (9) is provided with side's pipe (10).
2. The lightning-protection LED screen for the outdoor advertising board according to claim 1, wherein the aluminum alloy shell (3) forms a sealing structure with the rear shell (5) through the trapezoidal rubber ring (2) and the display screen (1), and the trapezoidal rubber ring (2) is tightly attached to the aluminum alloy shell (3).
3. The lightning-protection outdoor billboard LED screen according to claim 1, characterized in that the control panel (18) is electrically connected to the display screen (1), and the lightning protector (4) is electrically connected to the control panel (18).
4. The lightning-protection LED screen for the outdoor advertising board according to claim 1, wherein the backboard bracket (8) forms a semi-enclosed structure through a channel steel (9) and a square pipe (10), and the channel steel (9) and the square pipe (10) are perpendicular to each other.
5. The lightning-protection LED screen for outdoor advertising board of claim 1, wherein: backplate frame (8) still are equipped with:
the rain shield (11) is arranged at the top of the back plate frame (8), and a flow guide groove (12) is formed in the surface of the rain shield (11);
a lightning rod (13) disposed above the rain shield (11);
the galvanized steel pipe (14) is installed at the bottom of the backboard frame (8), the tail end of the galvanized steel pipe (14) is connected with an earth burying end (16), and the periphery of the earth burying end (16) is provided with a ground (15);
and the artificial grounding grid (17) is fixedly arranged below the buried end (16).
6. The LED screen for the lightning-proof outdoor billboard according to claim 5, characterized in that the rain shield (11) is welded to the back frame (8), and the flow guide grooves (12) are uniformly distributed along the surface of the rain shield (11).
7. The LED screen for the outdoor signboard of the lightning protection according to claim 5, wherein the lightning rod (13) is symmetrical with each other about the rain shield (11), and the galvanized steel pipe (14) and the buried end (16) are of an integrated structure.
CN202110885970.4A 2021-08-03 2021-08-03 Lightning-proof LED screen for outdoor advertising board Pending CN115148115A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110885970.4A CN115148115A (en) 2021-08-03 2021-08-03 Lightning-proof LED screen for outdoor advertising board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110885970.4A CN115148115A (en) 2021-08-03 2021-08-03 Lightning-proof LED screen for outdoor advertising board

Publications (1)

Publication Number Publication Date
CN115148115A true CN115148115A (en) 2022-10-04

Family

ID=83405499

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110885970.4A Pending CN115148115A (en) 2021-08-03 2021-08-03 Lightning-proof LED screen for outdoor advertising board

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Country Link
CN (1) CN115148115A (en)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201540699U (en) * 2009-11-17 2010-08-04 深圳市愿景光电子有限公司 LED display screen having waterproof structure
CN204045149U (en) * 2014-07-31 2014-12-24 深圳蓝普科技有限公司 Outdoor integral type display module and display device
CN204614374U (en) * 2015-05-20 2015-09-02 深圳市德润赛尔光电有限公司 A kind of outdoor LED display screen
CN205028598U (en) * 2015-08-20 2016-02-10 福建华杰光电有限公司 LED screen with water -proof effects
CN206003459U (en) * 2016-08-23 2017-03-08 深圳市星光彩科技有限公司 Large-scale outdoor LED display screen
CN106782113A (en) * 2016-12-15 2017-05-31 重庆英洛凡科技有限公司 A kind of LED display for outdoor advertising
CN206558183U (en) * 2017-03-09 2017-10-13 广东炜景广告有限公司 A kind of multifunctional outdoor advertising board
CN206758082U (en) * 2017-05-12 2017-12-15 浙江合策文化传媒有限公司 A kind of connected elevator card frame of magnetic
CN206921397U (en) * 2017-06-15 2018-01-23 山西亿杰电子科技有限公司 A kind of shockproof frame of LED screen
CN207008999U (en) * 2017-05-19 2018-02-13 天津汇泰广告有限公司 A kind of emitting led billboard
CN207425273U (en) * 2017-11-17 2018-05-29 深圳市纽斯达光电有限公司 A kind of anti-lightning strike and anticollision LED display
CN208903601U (en) * 2018-09-23 2019-05-24 艾来得机械(上海)有限公司 Mount structure before a kind of screen possessing aluminium material
CN212160284U (en) * 2020-05-29 2020-12-15 苏州浩玄微电子科技有限公司 Aluminum alloy screen frame structure
CN112233571A (en) * 2020-10-23 2021-01-15 深圳众永合科技有限公司 Motorcycle removes advertisement machine
CN213339464U (en) * 2020-10-13 2021-06-01 武汉中航电子有限公司 Outdoor rainproof outdoor LED spliced screen

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201540699U (en) * 2009-11-17 2010-08-04 深圳市愿景光电子有限公司 LED display screen having waterproof structure
CN204045149U (en) * 2014-07-31 2014-12-24 深圳蓝普科技有限公司 Outdoor integral type display module and display device
CN204614374U (en) * 2015-05-20 2015-09-02 深圳市德润赛尔光电有限公司 A kind of outdoor LED display screen
CN205028598U (en) * 2015-08-20 2016-02-10 福建华杰光电有限公司 LED screen with water -proof effects
CN206003459U (en) * 2016-08-23 2017-03-08 深圳市星光彩科技有限公司 Large-scale outdoor LED display screen
CN106782113A (en) * 2016-12-15 2017-05-31 重庆英洛凡科技有限公司 A kind of LED display for outdoor advertising
CN206558183U (en) * 2017-03-09 2017-10-13 广东炜景广告有限公司 A kind of multifunctional outdoor advertising board
CN206758082U (en) * 2017-05-12 2017-12-15 浙江合策文化传媒有限公司 A kind of connected elevator card frame of magnetic
CN207008999U (en) * 2017-05-19 2018-02-13 天津汇泰广告有限公司 A kind of emitting led billboard
CN206921397U (en) * 2017-06-15 2018-01-23 山西亿杰电子科技有限公司 A kind of shockproof frame of LED screen
CN207425273U (en) * 2017-11-17 2018-05-29 深圳市纽斯达光电有限公司 A kind of anti-lightning strike and anticollision LED display
CN208903601U (en) * 2018-09-23 2019-05-24 艾来得机械(上海)有限公司 Mount structure before a kind of screen possessing aluminium material
CN212160284U (en) * 2020-05-29 2020-12-15 苏州浩玄微电子科技有限公司 Aluminum alloy screen frame structure
CN213339464U (en) * 2020-10-13 2021-06-01 武汉中航电子有限公司 Outdoor rainproof outdoor LED spliced screen
CN112233571A (en) * 2020-10-23 2021-01-15 深圳众永合科技有限公司 Motorcycle removes advertisement machine

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Application publication date: 20221004