CN105761627B - Preceding maintenance LED display module - Google Patents
Preceding maintenance LED display module Download PDFInfo
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- CN105761627B CN105761627B CN201610172811.9A CN201610172811A CN105761627B CN 105761627 B CN105761627 B CN 105761627B CN 201610172811 A CN201610172811 A CN 201610172811A CN 105761627 B CN105761627 B CN 105761627B
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- electromagnet
- absorption member
- display module
- led display
- magnetic absorption
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating 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
- G09F9/33—Indicating 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
Abstract
LED display module is safeguarded before a kind of, comprising: LED box, die set and disassembly component.LED box includes cabinet and permanent magnet, and permanent magnet is set to cabinet.Die set includes bottom case, plug connector, electromagnet and the first magnetic absorption member, and bottom case covers at cabinet, and electromagnet is mutually fixed with bottom case, electromagnet is connect with permanent magnet magnetism, plug connector is set to bottom case, and plug connector and electromagnet are electrically connected, and the first magnetic absorption member is set to bottom case.Dismantling component includes shell, power supply, contact pin and the second magnetic absorption member, and power supply is set to shell, and contact pin is set to shell and is electrically connected with the power supply, when contact pin is used for plug connector grafting and conduction, make electromagnet conduction demagnetization, the second magnetic absorption member is set to shell, for connecting with the first magnetic absorption member magnetism.Maintenance LED display module can more simply and easily realize disassembly installation operation before above-mentioned, in addition, its integrally-built mechanical strength is also higher.
Description
Technical field
The present invention relates to display module technical fields, more particularly to maintenance LED display module before one kind.
Background technique
Currently, being maintained at this stage before LED display mould group, there are mainly two types of modes: the first is bayonet type structure,
It is previously inserted into mould group from mould group using a kind of tool, mould group aperture is rotatably installed in the lock of mould group bottom by tool
Structure dismounts mould group to realize from front, however, the structure of bayonet type, because of buckle structure reason, dismantling device needs have
Stronger structural strength, therefore it cannot be used in smaller spacing, it cannot usually be used below 6mm spacing, and contact is installed
Point is less, and mould group flatness is poor.
Second is magnetically attractive formula structure, by installing several permanent magnets in mould group bottom and tank surface, by magnet it
Between magnetic attraction fixed module, one piece of magnetic conductive metal, usually irony are installed in module internal, separately has in a tool and installs
There is the magnet of stronger magnetic force, when removing mould group, tool is adjacent to after mould group and is split out mould group by magnet suction.Due to magnetically attractive formula
Structure is by the suction fixed module between magnet, and to guarantee that mould group obtains preferable installation flatness, the distribution of magnet is equal
It is even, and to guarantee biggish suction, and removed to realize, removal tool should be bigger to the suction of mould group, not only in mould group
Portion, which need to be filled, guarantees suction compared with heavy metal, and deformation occurs because the suction of both ends generation simultaneously makes mould group by biggish mechanical stress
Even destroy；Especially for the product that uses of open air, in order to reach the performance of outdoor protection, magnetic attraction is bigger, not only at
This raising also generates very big hidden danger to product reliability.
Summary of the invention
Based on this, it is necessary to provide a kind of integrally-built mechanical strength it is higher, disassembly installation it is more simple and convenient and whole
The more simple and compact preceding maintenance LED display module of body structure.
LED display module is safeguarded before a kind of, comprising:
LED box, the LED box include cabinet and permanent magnet, and the permanent magnet is set to the cabinet；
Die set, the die set include bottom case, plug connector, electromagnet and the first magnetic absorption member, and the bottom case is provide with
In the cabinet, the electromagnet is mutually fixed with the bottom case, and the electromagnet is connect with the permanent magnet magnetism, the grafting
Part is set to the bottom case, and the plug connector and the electromagnet are electrically connected, and first magnetic absorption member is set to the bottom
Shell；And
Component is dismantled, the disassembly component includes shell, power supply, contact pin and the second magnetic absorption member, and the power supply is set to institute
Shell is stated, the contact pin is set to the shell and is electrically connected with the power supply, and the contact pin is used to insert with the plug connector
When connecing and is conductive, make the electromagnet conduction demagnetization, second magnetic absorption member is set to the shell, is used for and first magnetic
Inhale the connection of part magnetism.
The permanent magnet is at least partly placed on outside the cabinet in one of the embodiments, the electromagnet
Be at least partly placed on outside the bottom case, the permanent magnet is supported with the electromagnet.
The permanent magnet has the cross section of rectangular configuration in one of the embodiments,.
The electromagnet has ring structure in one of the embodiments,.
The plug connector includes two insert-connecting plates being fixed to each other, two insert-connecting plates in one of the embodiments,
For clamping the contact pin jointly.
Two plug connectors are set in one of the embodiments, two contact pins, each contact pin point are set
It Dui Ying be plugged in a plug connector, for keeping the two conductive.
The power supply is battery in one of the embodiments,.
The die set further includes circuit board in one of the embodiments, and the circuit board is set to the bottom case
Inside, first magnetic absorption member are set to the circuit board.
The bottom of the bottom case is additionally provided with bottom case in one of the embodiments, and the electromagnet is set to the bottom
Shell.
The material of the electromagnet is soft magnetic bodies in one of the embodiments,.
Maintenance LED display module can be more simple and convenient by setting LED box, die set and disassembly component before above-mentioned
Disassembly installation operation is realized on ground, and overall structure is more simple and compact, in addition, LED box and die set pass through permanent magnet and electromagnetism
The magnetic effect of iron is securely mutually fixed, it is ensured that higher integrally-built mechanical strength.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the preceding maintenance LED display module of an embodiment of the present invention；
Fig. 2 is the partial structural diagram of the electromagnet of an embodiment of the present invention.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more
Any and all combinations of relevant listed item.
Referring to Fig. 1, preceding maintenance LED display module 10 includes: LED box 100, die set 200 and disassembly component
300, die set 200 is installed in LED box 100, for example, die set 200 is installed on the front end of LED box 100；Again
Such as, die set 200 is installed on the front end of LED box 100, and the LED display for being provide with LED box 100, to play
Preceding maintenance function.When needing to be dismantled die set 200 from LED box 100, by disassembly component 300 and mould group group
Part 200 connects, then die set 200 is dismantled from LED box 100.
Referring to Fig. 1, LED box 100 includes cabinet 110 and permanent magnet 120, permanent magnet 120 is set to cabinet 100.Example
Such as, the LED box further includes LED display and circuit unit, and the circuit unit is placed in the box house, described
LED display is embedded at the cabinet, and the LED display and the circuit unit are electrically connected.For example, the permanent magnetism
Body is set to the edge of the cabinet；For another example, several permanent magnets are set to, several magnet rings are around the cabinet
Edge setting；For another example, several permanent magnets are arranged around the LED display.
Referring to Fig. 1, die set 200 includes bottom case 210, plug connector 220, electromagnet 230 and the first magnetic absorption member 240,
Bottom case 210 covers at cabinet 110, for example, the bottom case is used to be provide with the LED display of the box house, thus right
The LED display plays the role of protection；For another example, the LED display is set to the front end of the cabinet, and the bottom case is used
The maintenance before being provide with the LED display for being installed on the cabinet front end, and then play the role of, i.e., preceding maintenance LED are shown
Mould group.For example, the material of the electromagnet is soft magnetic bodies, e.g., the electromagnet is prepared using soft magnetic bodies；For another example, described
Electromagnet has ring structure.
Referring to Fig. 1, electromagnet 230 is fixed with 210 phase of bottom case, electromagnet 230 is connect with 120 magnetism of permanent magnet, for example,
It is heteropolar attracting with the permanent magnet that the magnetism is connected as the electromagnet, generates magnetic attraction, by the electromagnet with it is described
The mutual sticking of permanent magnet, so that can be more securely mounted on the cabinet with the fixed bottom case of the electromagnetism iron phase,
So that the bottom case realizes the magnetic effect connecting with the cabinet.For example, the electromagnet is supported with the permanent magnet
And the magnetic pole that the two is in contact be it is heteropolar, certainly, interval is also provided between the electromagnet and the permanent magnet,
When ensuring the magnetic fields of the two, the bottom case can mutually be fixed with the cabinet.
It is appreciated that be directed to for the outdoor preceding maintenance LED display module used, due at it in use, often needing
Carry and disassembling operations, these operations are easy to generate stronger impact to the preceding maintenance LED display module, lead to
The magnetism for crossing the electromagnet and the permanent magnet is attracting, it can be ensured that the LED box is connect more with the die set
It is firm well, it is not readily separated, and the bayonet type structure more complex without installation and removal, flatness is poor.
For example, the bottom case is provided with mask；For another example, the mask is located at one of the bottom case far from the LED box
Side.
In order to reinforce the magnetic attraction between the electromagnet and the permanent magnet, so reinforce the die set with it is described
The fastness installed between LED box ensures that the two is not readily separated, for example, the permanent magnet is at least partly placed on institute
It states outside cabinet, the electromagnet is at least partly placed on outside the bottom case, and the permanent magnet is supported with the electromagnet；
For another example, the permanent magnet has the cross section of rectangular configuration, and e.g., the permanent magnet has cuboid structure；For another example, the electromagnetism
Iron has ring structure, in this way, can reinforce the magnetic attraction between the electromagnet and the permanent magnet.
Referring to Fig. 1, plug connector 220 is set to bottom case 210, and plug connector 220 and electromagnet 230 are electrically connected, and work as electricity
When 230 no power of magnet, electromagnet 230 has magnetism, i.e. electromagnet 230 generates magnetic attracting with permanent magnet 120, and the two is close
Ground contacts, for so that the LED box and the die set are mutually fixed, the die set to be described for covering
LED box, to play the role of the protection LED box.
Referring to Fig. 1, the first magnetic absorption member 240 is set to bottom case 210, for example, first magnetic absorption member is set to the bottom
Inside shell.For example, first magnetic absorption member is permeability magnetic material, for when with magnet contact, the two to generate magnetic phase suction phenomenon.
In order to preferably install first magnetic absorption member, for example, the die set further includes circuit board, the circuit board
It is set to the bottom shell, first magnetic absorption member is set to the circuit board, in this way, described first can preferably be installed
Magnetic absorption member.
Referring to Fig. 1, disassembly component 300 includes shell 310, power supply 320, contact pin 330 and the second magnetic absorption member 340, power supply
320 are set to shell 310, for example, the power supply is battery, in this way, the portability of the disassembly component can be improved, and certainly,
The power supply is not limited to battery, for example, it is also possible to using the design of direct external power supply, for making the contact pin be powered.
Referring to Fig. 1, contact pin 330 is set to shell 310, and contact pin 330 and power supply 320 are electrically connected, and contact pin 330 is used
When with 220 grafting of plug connector and conduction, make the conductive demagnetization of electromagnet 230.Second magnetic absorption member 340 is set to shell 310, is used for
It is connect with 240 magnetism of the first magnetic absorption member.For example, the material of the plug connector and the contact pin is copper.
It should be noted that when the contact pin is inserted into the plug connector, due to the plug connector and power supply electricity
Property connection, i.e., the described plug connector is in conduction state, in this way, the electromagnet can be made to be in conduction state, for example, the electricity
The material of magnet is soft magnetic bodies, due to having conductive demagnetization, the characteristic of magnetisation is powered off, in this way, when will be described in contact pin insertion
When plug connector, the magnetic of the electromagnet disappears, i.e., the magnetic event resolves between the described electromagnet and the permanent magnet, also
To say, the permanent magnet will not electromagnet described in sticking again, in this way, the cabinet and the bottom case, i.e., the described LED box and institute
The binding force stated between die set disappears, and the die set is separated with the LED box, in the process, described second
Magnetic absorption member is in conjunction with first magnetic absorption member, in this manner it is possible to it is fixedly connected with the disassembly component with the die set, this
When, it need to only pull the disassembly component can be easily by the die set from institute towards the direction far from the LED box
It states and is pulled out in LED box, disassembling section is simple and convenient.
For example, the manufacturer of the electromagnet be the rich subelectron Science and Technology Ltd. in Dongguan, model 2560K, or
The electromagnetism iron product of 2560 series, certainly, the electromagnet is not limited to this, can also be selected according to the actual situation, only
Ensure the electromagnet power-off magnetisation, energization demagnetization.
For example, first magnetic absorption member and second magnetic absorption member are magnet, for another example, first magnetic absorption member with it is described
One is magnet among second magnetic absorption member, and another one is metalwork；For another example, first magnetic absorption member is metalwork, e.g., sheet metal
Or metal plate, to realize that install convenient, second magnetic absorption member are magnet, to realize that the two when coming close to or in contact with, is realized
Magnetic attracting, certainly, the combination of the two or form are not limited to this, for example, first magnetic absorption member and second magnetic absorption member
Design using and the permanent magnet and the electromagnet same design, with advanced optimize disassembly and installation operate, as long as
The magnetic attraction both ensured can provide pulling force that the disassembly component pulls out the die set from the LED box i.e.
It can.
It is further preferred that there is magnetism, at this point, the electricity since the electromagnet is in the case where being not powered on
Magnet is equivalent to connector, is in the die set and the LED box and is connected and fixed state, and the work based on magnetic
With integrally-built mechanical strength is higher, and external force resistance impact effect is more preferable, is extremely applicable to the outdoor preceding maintenance LED used
Display module, for example, for safeguarding LED display module before outdoor stage or performance etc..In addition, when the LED box with it is described
Die set can have magnetism without being powered in electromagnet when being connected and fixed state, being prepared using soft magnetic bodies, can
Greatly to save electric energy, and when disassembly is desired, the electromagnet is made to be powered, is in erasing state, then pass through described second
The magnetic of magnetic absorption member and first magnetic absorption member acts on, and the die set is easily pulled out from the LED box, also
It is to say, safeguards that LED display module passes through the switching of two groups of magnetic assemblies before described, may be implemented to ensure that overall structure pacifies installation and dismantling
It unloads more quickly and timely.Finally, safeguarding that LED shows mould before above-mentioned relative to traditional bayonet type structure and magnetic-type structure
Group can easily realize installation and removal operation using the switching of two groups of identical or different magnetic assemblies, and overall structure is more
It is simple and compact.
The disassembly process of maintenance LED display module is as follows before above-mentioned:
When need to install it is described before maintenance LED display module when, firstly, will in the magnetic electromagnet with it is described
Permanent magnet is opposite, and die set is located in the LED box later, is based on the electromagnet and the permanent magnet magnetism phase
The effect of suction, the die set and the LED box complete installation operation.
When needing to dismantle the preceding maintenance LED display module, firstly, the contact pin of the disassembly component is inserted into
In the plug connector of the die set, in the process, second magnetic absorption member and the first magnetic absorption member magnetism are attracting,
So that the disassembly component is connected and fixed with the die set, later, due to the electromagnet energization demagnetization, the electromagnet
Magnetic interattraction between the permanent magnet is loss, finally, driving the die set from described the disassembly component
Pulling out in LED box can be completed disassembling section, simple and convenient.It should be pointed out that according to the actual situation, the permanent magnet with
Magnetic attraction between the electromagnet is greater than the magnetic attraction of second magnetic absorption member and first magnetic absorption member, described for pulling out
After die set, the quick separating of the die set and the disassembly component is realized.
In order to preferably make the plug connector and the contact pin that electric connection be better achieved, for example, the plug connector packet
Two insert-connecting plates being fixed to each other are included, two insert-connecting plates for clamping the contact pin jointly；For another example, the die set is set
Two plug connectors are set, two contact pins are arranged in the disassembly component, and each contact pin, which respectively corresponds, is plugged in an institute
Plug connector is stated, it is conductive for making the two, electrically connect in this way, the plug connector can preferably be made to be better achieved with the contact pin
It connects.
In order to make second magnetic absorption member and first magnetic absorption member preferably sticking and be connected and fixed, for example,
The bottom case offers jack, and the plug connector is set to the jack bottom, and described after the contact pin is inserted into the jack
Plug connector is electrically connected；For another example, the bottom case offers bit-avoiding slot, and first magnetic absorption member is set to the bit-avoiding slot bottom,
Second magnetic absorption member is connect after passing through the bit-avoiding slot with the first magnetic absorption member magnetism.
In order to reinforce magnetic attraction between the permanent magnet and the electromagnet, and then improve the LED box and the mould
Connection fixing between group component, to improve external force resistance impact degree, for example, referring to Fig. 2, the electromagnet 230 includes
Several electromagnet subelements 231, several electromagnet subelements 231 are connected in parallel, and certainly, the electromagnet subelement can also
Think series connection, in this way, magnetic attraction between the permanent magnet and the electromagnet can be reinforced, and then improves the LED case
Connection fixing between body and the die set, to improve external force resistance impact degree.
Maintenance LED display module 10 is by setting LED box 100, die set 200 and disassembly component 300 before above-mentioned
It can more simply and easily realize disassembly installation operation, overall structure is more simple and compact, in addition, LED box 100 and die set
200 are securely mutually fixed by permanent magnet 120 and the magnetic effect of electromagnet 230, it is ensured that higher integrally-built machinery
Intensity.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Only several embodiments of the present invention are expressed for embodiment described above, and the description thereof is more specific and detailed, but
It cannot be construed as a limitation to the scope of the present invention.It should be pointed out that for the ordinary skill people of this field
For member, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to of the invention
Protection scope.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (9)
1. safeguarding LED display module before a kind of characterized by comprising
LED box, the LED box include cabinet and permanent magnet, and the permanent magnet is set to the cabinet；
Die set, the die set include bottom case, plug connector, electromagnet and the first magnetic absorption member, and the bottom case covers at institute
Cabinet is stated, the electromagnet is mutually fixed with the bottom case, and the electromagnet is connect with the permanent magnet magnetism, and the plug connector is set
It is placed in the bottom case, and the plug connector and the electromagnet are electrically connected, first magnetic absorption member is set to the bottom case；And
Component is dismantled, the disassembly component includes shell, power supply, contact pin and the second magnetic absorption member, and the power supply is set to the shell
Body, the contact pin are set to the shell and are electrically connected with the power supply, and the contact pin is used for the plug connector grafting simultaneously
When conductive, make the electromagnet conduction demagnetization, second magnetic absorption member is set to the shell, is used for and first magnetic absorption member
Magnetism connection, the plug connector include two insert-connecting plates being fixed to each other, and two insert-connecting plates for clamping described insert jointly
Needle.
2. safeguarding LED display module before according to claim 1, which is characterized in that at least partly dew of the permanent magnet
It is placed in outside the cabinet, the electromagnet is at least partly placed on outside the bottom case, the permanent magnet and the electromagnetism
Iron supports.
3. safeguarding LED display module before according to claim 1, which is characterized in that the permanent magnet has rectangular configuration
Cross section.
4. safeguarding LED display module before according to claim 1, which is characterized in that the electromagnet has ring structure.
5. safeguarding LED display module before according to claim 1, which is characterized in that two plug connectors of setting, setting
Two contact pins, each contact pin, which respectively corresponds, is plugged in a plug connector, for keeping the two conductive.
6. safeguarding LED display module before according to claim 1, which is characterized in that the power supply is battery.
7. safeguarding LED display module before according to claim 1, which is characterized in that the die set further includes circuit
Plate, the circuit board are set to the bottom shell, and first magnetic absorption member is set to the circuit board.
8. safeguarding LED display module before according to claim 1, which is characterized in that the inside of the bottom case is additionally provided with
Circuit board, first magnetic absorption member are set to the circuit board.
9. safeguarding LED display module before according to claim 1, which is characterized in that the material of the electromagnet is soft magnetism
Body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172811.9A CN105761627B (en) | 2016-03-23 | 2016-03-23 | Preceding maintenance LED display module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610172811.9A CN105761627B (en) | 2016-03-23 | 2016-03-23 | Preceding maintenance LED display module |
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| CN105761627A CN105761627A (en) | 2016-07-13 |
| CN105761627B true CN105761627B (en) | 2019-01-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106530983A (en) * | 2016-11-08 | 2017-03-22 | 深圳市易事达电子有限公司 | Display screen |
| CN108230916A (en) * | 2016-12-12 | 2018-06-29 | 深圳市易事达电子有限公司 | LED display and LED display |
| CN108247667A (en) * | 2017-12-30 | 2018-07-06 | 哈尔滨工业大学深圳研究生院 | A kind of rapid replacing interface of the reconfigurable manipulator of isomorphism |
| CN108247678A (en) * | 2017-12-30 | 2018-07-06 | 哈尔滨工业大学深圳研究生院 | A kind of rapid replacing interface for the reconfigurable manipulator being attracted based on magnet |
| CN109599038A (en) * | 2019-01-22 | 2019-04-09 | 深圳市联建光电有限公司 | A kind of preceding maintaining method of LED module, LED module and LED module |
| CN110216705A (en) * | 2019-06-25 | 2019-09-10 | 北京理工华汇智能科技有限公司 | Service robot manipulator grasping system |
| CN112562502B (en) * | 2019-09-25 | 2022-11-22 | 深圳市洲明科技股份有限公司 | Display screen, module maintenance system and method |
| CN210429163U (en) * | 2019-10-21 | 2020-04-28 | 广州视源电子科技股份有限公司 | LED box and display screen |
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| JP2001242795A (en) * | 2000-02-28 | 2001-09-07 | Sharp Corp | Led display device and led information display plate |
| CN201655193U (en) * | 2010-01-14 | 2010-11-24 | 深圳市奥拓电子股份有限公司 | LED display screen module structure easy for pre-maintenance |
| EP2381755B1 (en) * | 2010-04-26 | 2015-11-04 | LG Electronics Inc. | Multi display device |
| CN202601108U (en) * | 2012-05-11 | 2012-12-12 | 北京彩易达科技发展有限公司 | Magnetic attraction type light-emitting diode (LED) display unit board and LED display screen formed by assembling same |
| CN103337224B (en) * | 2013-05-28 | 2015-09-09 | 深圳市艾比森光电股份有限公司 | LED display |
| CN203490915U (en) * | 2013-10-12 | 2014-03-19 | 深圳雷曼光电科技股份有限公司 | Front maintenance structure of LED display screen and LED display screen |
| CN203733418U (en) * | 2013-11-07 | 2014-07-23 | 深圳市易事达电子股份有限公司 | Front maintaining tool for LED (light emitting diode) display screen module |
| CN104112403B (en) * | 2014-07-01 | 2017-07-14 | 深圳市奥拓电子股份有限公司 | The preceding maintaining method of LED modules and the LED display using this method on LED display |
| CN104851371B (en) * | 2015-06-01 | 2017-08-25 | 吴小刚 | LED box and module and its assembly and disassembly methods are safeguarded before a kind of small spacing |
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- 2016-03-23 CN CN201610172811.9A patent/CN105761627B/en active Active
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