CN109118970A - Mask, display module and LED display - Google Patents
Mask, display module and LED display Download PDFInfo
- Publication number
- CN109118970A CN109118970A CN201810855359.5A CN201810855359A CN109118970A CN 109118970 A CN109118970 A CN 109118970A CN 201810855359 A CN201810855359 A CN 201810855359A CN 109118970 A CN109118970 A CN 109118970A
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- mask
- pcb board
- conductive layer
- display module
- fastener
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Classifications
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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
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- 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
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The present invention relates to a kind of mask, display module and LED displays, the mask includes substrate and the first conductive layer, lamp hole is provided in the substrate, so that LED lamp bead passes through, the substrate includes the first end face and second end face being oppositely arranged, first conductive layer is set in the first end face, when the mask is assemblied on the pcb board of display module by fastener, first conductive layer is contacted with the fastener, so that the lamp face of first conductive layer and the fastener, pcb board forms electromagnetic shielding net.The display module and LED display include above-mentioned mask.Above-mentioned mask, display module and LED display, by the way that the first conductive layer is arranged, mask is set also to generate interference electromagnetic wave, and the interference electromagnetic wave of mask generation is contrary with the interference electromagnetic wave that pcb board head-on radiation comes out, magnetic pole is opposite, it can thus cancel out each other, and then effectively reduce the electromagnetic interference of display module.
Description
Technical field
The present invention relates to display fields, more particularly to mask, display module and LED display.
Background technique
Either at home or in the world, the EMC of LED display authenticates (Electro Magnetic Compatibility certification), is all that LED is shown
Screen enters the entry criteria in market.With the development of LED industry in recent years, the EMC certification of indoor LED display requires to reach
The standard of international Safety Approval is arrived.But for outdoor LED display screen, firstly, use environment is comparatively loose, secondly,
Since limitation of the outdoor LED display screen in structure is difficult to have breakthrough, just make the EMC Valuation Standard of outdoor LED display screen
It is also far from enough.
Outdoor LED display screen reduces EMC, this mode display screen biggish for spacing mostly by the way of ground connection
For can satisfy, still, for small-pitch display screen, be then unable to satisfy, this is because the pcb board of small clearance display screen
The number of plies (VCC layers) more, the positive radiation of lamp plate also can be very big, the mode of ground connection can only connecting PCB board unilateral side GND, and
For the head-on radiation of pcb board, then helpless, in addition, outdoor LED display screen is since density of components is big, the radiation of generation
Electromagnetic wave also can be released largely from lamp face, this can seriously affect the test data of EMC.
Summary of the invention
Based on this, it is necessary to ask for the positive radiated electromagnetic wave of lamp plate of LED display what EMC test impacted
Topic provides a kind of mask, display module and LED display.
First aspect present invention provides a kind of mask, including substrate and the first conductive layer, is provided with lamp hole in the substrate,
So that LED lamp bead passes through, the substrate includes the first end face and second end face being oppositely arranged, and first conductive layer is set to
In the first end face, when the mask is assemblied on the pcb board of display module by fastener, first conductive layer with
The fastener contact, so that the lamp face of first conductive layer and the fastener, pcb board forms electromagnetic shielding net.
First conductive layer is metallic conduction paint layer in one of the embodiments,.
It in one of the embodiments, further include display layer, the display layer is in black, is set to the second end face
On, to adjust the display effect that the first conductive layer rear mask is arranged.
Above-mentioned mask makes mask also generate interference electromagnetic wave, and the interference electricity that mask generates by the way that the first conductive layer is arranged
Magnetic wave is contrary with the interference electromagnetic wave that pcb board head-on radiation comes out, magnetic pole is opposite, it is thus possible to it cancels out each other, Jin Eryou
The electromagnetic interference of the reduction display module of effect.
Second aspect of the present invention provides a kind of display module, including bottom case, pcb board, LED lamp bead, fastener and mask, institute
It states pcb board to be set on the bottom case, the LED lamp bead array is arranged on the pcb board, and the mask is any of the above-described
The mask, the lamp hole that the LED lamp bead passes through the mask expose to the mask, also set up in the substrate of the mask
There are several fixation holes, the fastener passes through the fixation hole and is connected and fixed the mask and the pcb board, and the mask
The first conductive layer contacted with the fastener, first conductive layer and the fastener, pcb board lamp face between formed
It is electromagnetically shielded net.
The fastener includes back-off needle in one of the embodiments, and the back-off needle is fixed on the pcb board,
The mask is fixedly connected on the pcb board by the back-off needle.
The back-off needle includes the head and tail portion being oppositely arranged in one of the embodiments, and the tail portion is fixed to be connected
It is connected to the pcb board, the head is provided with an annular groove, and the mask is being sheathed on the head with the annular groove
First conductive layer of corresponding position, the mask is contacted with the side wall of the annular groove or bottom, thus in the PCB
The lamp face of plate is buckled to formation electromagnetic shielding net between needle and the first conductive layer.
In one of the embodiments, the tail portion be fixedly connected on the pcb board away from the one of the LED lamp bead
Side.
The head includes first part, second part and Part III in one of the embodiments, and described first
It is divided into the part between the annular groove and the tail portion on the head, the second part is recessed with the annular
The corresponding part of slot, the Part III are the part far from the tail portion on the head, the first part and described the
Three parts are located at the two sides of the annular groove, are oppositely arranged, and are connected by the second part, and the mask is arranged
In the outer rim of the second part, and the diameter of the fixation hole of the mask is less than the section of the first part and Part III
Width.
The diameter of the fixation hole is less than or equal to the cross-sectional width of the second part in one of the embodiments, or
Greater than the cross-sectional width of the second part.
Third aspect present invention provides a kind of LED display, which is characterized in that including fixed frame and at least one display mould
Group, the display module are fixed on the fixed frame, and the display module is any of the above-described display module.
Above-mentioned display module and LED display make mask also generate interference electromagnetism by the way that the first conductive layer is arranged in mask
Wave, and the interference electromagnetic wave of the mask interference electromagnetic wave and the pcb board head-on radiation that generate out is contrary, magnetic pole on the contrary, because
And it can cancel out each other, and then effectively reduce the electromagnetic interference of display module.
Detailed description of the invention
Fig. 1 is the schematic diagram of the section structure of the mask of one embodiment of the invention；
Fig. 2 is the schematic diagram of the section structure of the display module of one embodiment of the invention；
Fig. 3 is the schematic diagram of the section structure of the back-off needle of the display module of one embodiment of the 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, Fig. 1 illustratively shows the structural schematic diagram of one embodiment of the invention mask 10, the mask
10 include substrate 110 and the first conductive layer 120, is provided with lamp hole 110a in the substrate 110, described so that LED lamp bead passes through
Substrate 110 includes the first end face 111 and second end face 113 being oppositely arranged, and first conductive layer 120 is set to described first
On end face 111, when the mask 10 is assemblied on the pcb board of display module by fastener, first conductive layer 120 with
The fastener contact, so that the lamp face of first conductive layer 120 and the fastener, pcb board forms electromagnetic shielding net.
When the mask 10 is assemblied in display module, the front of display module can be effectively reduced (i.e. locating for LED light
Lamp face) electromagnetic interference.At work, the interference electromagnetic wave that pcb board head-on radiation comes out passes display module along fastener
It is delivered to conductive layer, conductive layer of mask 10 itself also generates interference electromagnetic wave, and the interference electromagnetic wave and pcb board that mask 10 generates
Head-on radiation come out interference electromagnetic wave is contrary, magnetic pole on the contrary, form convection current each other, to counteract part electromagnetic wave,
Play the role of reducing electromagnetic interference.
In some embodiments, first conductive layer 120 is metallic conduction paint layer.The metallic conduction paint layer directly at
For type in the substrate 110, molding mode can be one of spraying, coating, printing, 3D printing or a variety of, certainly,
It can be other molding modes, as long as metallic conduction paint can be molded in substrate 110.
In some embodiments, the mask 10 further includes display layer 140, and the display layer 140 is in black, is set to institute
It states in second end face 113, to adjust the display effect of setting conductive layer rear mask 10.The display layer 140 can directly at
Type is in the second end face 113 of the substrate 110.
Above-mentioned mask 10 makes mask 10 also generate interference electromagnetic wave, and mask 10 produces by the way that the first conductive layer 120 is arranged
Raw interference electromagnetic wave is contrary with the interference electromagnetic wave that pcb board head-on radiation comes out, magnetic pole is opposite, it is thus possible to mutually support
Disappear, and then effectively reduces the electromagnetic interference of display module.
Referring to Fig. 2, one embodiment of the invention also provides a kind of display module 20, the display module 20 includes bottom case
210, pcb board 220, LED lamp bead 230, fastener 240 and mask 250, the pcb board 220 are set on the bottom case 210, institute
Being arranged on the pcb board 220 for 230 array of LED lamp bead is stated, the mask 250 is mask described in any of the above-described embodiment
10, the lamp hole that the LED lamp bead 230 passes through the mask 250 exposes to the mask 250, goes back in the substrate of the mask 250
Several fixation holes are provided with, the fixation hole can be set between four adjacent lamp holes, and the fastener 240 passes through described
The mask 250 and the pcb board 220 are connected and fixed by fixation hole, and the first conductive layer of the mask 250 and the fastening
Part 240 contacts, first conductive layer and the fastener 240, pcb board 220 lamp face between form electromagnetic shielding net.
In some embodiments, the fastener 240 be fixed on the pcb board 220 away from the LED lamp bead 230
Side.In the particular embodiment, the side away from the LED lamp bead 230 of the pcb board 220 is in the periphery of the perforation
It is provided with pad 221, the fastener 240 is fixedly welded on the pad 221.
Please refer to figs. 2 and 3, in one or more embodiments, the fastener 240 include back-off needle 241, it is described fall
Fibula 241 is fixed on the pcb board 220, and the mask 250 is fixedly connected on the pcb board by the back-off needle 241
220.The back-off needle 241 includes the head 2411 and tail portion 2413 being oppositely arranged, and the cross-sectional width D1 on the head 2411 is small
Cross-sectional width D2 in the tail portion 2413, the fixation hole is corresponded on the pcb board 220 and back-off needle 241 is provided with perforation,
The head 2411 of the back-off needle 241 passes through the perforation from the side away from the LED lamp bead 230 of the pcb board 220
Afterwards, it enters in the fixation hole of the mask 250, and mask 250 is sheathed on the head 2411, the tail portion 2413 is fixed
It is connected to the side away from the LED lamp bead 230 of the pcb board 220, so that the mask 250 passes through the back-off needle 241
It is fixed on pcb board 220.
The mask 250 is fixed on the head 2411 for being buckled to needle 241 being arranged by way of buckling and being combined, and nothing
The cooperation of screw or other parts need to be used to complete to fix.The fixed mask 250 by way of buckle, while needle 241 will be buckled to
Be fixedly connected on pcb board 220, compared to by way of the fixed mask 250 of screw, can to avoid in fixed mask 250 to LED
The damage of lamp bead 230.
In the particular embodiment, the head 2411 is provided with an annular groove 2415,2415 edge of annular groove
The circumferential setting on the head 2411, the diameter of the fixation hole are less than the cross-sectional width on the head 2411, thus when described
When head 2411 penetrates the fixation hole of the mask 250, the head 2411 forms tight fit with the mask 250, finally exists
Under the action of external force, the mask 250 is sheathed on the position corresponding with the annular groove 2415 on the head 2411, when
When mask 250 is fixed, the first conductive layer of mask 250 is contacted with the side wall of the annular groove 2415 or bottom, thus
The lamp face of pcb board 220 is buckled to formation electromagnetic shielding net between needle 241 and the first conductive layer, plays the work for eliminating interference electromagnetic wave
With.
The annular groove 2415 is set to the one end far from the tail portion 2413 on the head 2411, according to the ring
2415 present position of connected in star, the head 2411 include first part 241a, second part 241b and Part III 241c, institute
State the part between the annular groove 2415 and the tail portion 2413 that first part 241a is the head 2411, institute
Stating second part 241b is part corresponding with the annular groove 2415, and the Part III 241c is the head 2411
Part far from the tail portion 2413, the first part 241a and the Part III 241c are located at the annular groove
2415 two sides, are oppositely arranged, and pass through the second part 241b connection.The mask 250 is sheathed on the second part
The outer rim of 241b, and the diameter of the fixation hole of the mask 250 cutting less than the first part 241a and Part III 241c
Face width.The diameter of the fixation hole can be less than or equal to the cross-sectional width of the second part 241b, can also be greater than described
The cross-sectional width of second part 241b, as long as mask 250 can be sheathed on the second part 241b, the of mask 250
One conductive layer is in contact with back-off needle 241.In the particular embodiment, for the ease of the assembly of mask 250, the head
2411 be cylinder, and the first part 241a, second part 241b, Part III 241c can correspond to cylinder, at this point,
Cross-sectional width, that is, corresponding part diameter of first part 241a, second part 241b, Part III 241c.
After mask 250 is sheathed on the periphery of second part 241b, first part 241a is covered by mask 250, third portion
241c is divided to expose to the mask 250, so that Part III 241c looks from the appearance is similar to a bolt head.
When mask 250 is inserted in the annular groove 2415, the head 2411 of the back-off needle 241 is aligned first solid
Determine hole, at this point, the cross-sectional width due to Part III 241c is greater than the diameter of fixation hole, mask 250 cannot be inserted in third
Part 241c, under the effect of external force, Part III 241c are penetrated in fixation hole, and mask 250 sends deformation and is sheathed on described
Part III 241c outer rim, under the continuous action of external force, mask 250 enters the annular groove along Part III 241c
In 2415, it is sheathed on the outer rim of the second part 241b, i.e., completes to fix by mask 250 and the back-off needle 241.Some
In embodiment, for the ease of the positioning of mask 250 and back-off needle 241, the Part III 241c is far from the annular groove
2415 one end is provided with inclined-plane.
In the particular embodiment, the back-off needle 241 is made of stainless steel material, while there is stronger rigidity,
It is not easy to get rusty again.Further, in order to reduce back-off needle 241 and mask 250 between frictional force, it is described back-off needle 241 surface
It can also carry out Nickel Plating Treatment.
It will be appreciated by persons skilled in the art that the implementation of the fastener is not limited to back-off needle 241, only need
Meet to be formed between fastener 241 and the first conductive layer of mask 250 and be steadily contacted, and then first in mask 250 is conductive
Electromagnetic shielding net is formed between the lamp face of layer, fastener and pcb board.Illustratively, special add can be carried out to screw
Work processing, processes to form an annular groove in the nut portion of screw, and then ties the structure of screw and the head of back-off needle 241
Structure is similar, and same effect also may be implemented.
In some embodiments, the display module 20 further includes encapsulating glue-line, and the encapsulating glue-line is set to the PCB
On plate 220, the LED lamp bead 230 at least partly exposes to the encapsulating glue-line.It, can be to avoid water by the way that encapsulating glue-line is arranged
Divide and enter on pcb board 220, enhances the waterproof performance of display module 20.
In the embodiment for being provided with encapsulating glue-line, the back-off needle 241 is first fixed on the pcb board 220, then at
Encapsulating is carried out on pcb board 220.
Above-mentioned display module 20, by making mask 250 also generate interference electromagnetic wave in the first conductive layer of setting of mask 250,
And the interference electromagnetic wave of mask 250 interference electromagnetic wave and 220 head-on radiation of pcb board that generate out is contrary, magnetic pole on the contrary,
It can thus cancel out each other, and then effectively reduce the electromagnetic interference of display module 20.
The present invention also provides a kind of LED display, the LED display includes fixed frame and at least one display module,
The display module is fixed on the fixed frame, and the display module is display module described in any of the above-described embodiment.
Above-mentioned LED display makes mask also generate interference electromagnetic wave, and mask by the way that the first conductive layer is arranged in mask
The interference electromagnetic wave of generation is contrary with the interference electromagnetic wave that pcb board head-on radiation comes out, magnetic pole is opposite, it is thus possible to mutually
It offsets, and then effectively reduces the electromagnetic interference of display module.
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.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of mask, which is characterized in that including substrate and the first conductive layer, lamp hole is provided in the substrate, for LED light
Pearl passes through, and the substrate includes the first end face and second end face being oppositely arranged, and first conductive layer is set to described first
On end face, when the mask is assemblied on the pcb board of display module by fastener, first conductive layer and the fastening
Part contact, so that the lamp face of first conductive layer and the fastener, pcb board forms electromagnetic shielding net.
2. mask according to claim 1, which is characterized in that first conductive layer is metallic conduction paint layer.
3. mask according to claim 1, which is characterized in that further include display layer, the display layer is in black, is set to
In the second end face, to adjust the display effect that the first conductive layer rear mask is arranged.
4. a kind of display module, which is characterized in that including bottom case, pcb board, LED lamp bead, fastener and mask, the pcb board is set
It is placed on the bottom case, the LED lamp bead array is arranged on the pcb board, and the mask is any one of claim 1-3
The mask, the lamp hole that the LED lamp bead passes through the mask expose to the mask, also set up in the substrate of the mask
There are several fixation holes, the fastener passes through the fixation hole and is connected and fixed the mask and the pcb board, and the mask
The first conductive layer contacted with the fastener, first conductive layer and the fastener, pcb board lamp face between formed
It is electromagnetically shielded net.
5. display module according to claim 4, which is characterized in that the fastener includes back-off needle, the back-off needle
It is fixed on the pcb board, the mask is fixedly connected on the pcb board by the back-off needle.
6. display module according to claim 5, which is characterized in that the back-off needle includes the head being oppositely arranged and tail
Portion, the tail portion are fixedly connected on the pcb board, and the head is provided with an annular groove, and the mask is sheathed on the head
The position corresponding with the annular groove in portion, the first conductive layer of the mask and the side wall of the annular groove or bottom
Contact, to form electromagnetic shielding net between the lamp face of the pcb board, back-off needle and the first conductive layer.
7. display module according to claim 6, which is characterized in that the tail portion is fixedly connected on the back of the pcb board
Side from the LED lamp bead.
8. display module according to claim 6, which is characterized in that the head include first part, second part and
Part III, the first part are the part between the annular groove and the tail portion on the head, described the
Two parts are part corresponding with the annular groove, and the Part III is the part far from the tail portion on the head,
The first part and the Part III are located at the two sides of the annular groove, are oppositely arranged, and pass through described second
Part connects, and the mask is sheathed on the outer rim of the second part, and the diameter of the fixation hole of the mask is less than described the
The cross-sectional width of a part and Part III.
9. display module according to claim 8, which is characterized in that the diameter of the fixation hole is less than or equal to described second
Partial cross-sectional width, or the cross-sectional width greater than the second part.
10. a kind of LED display, which is characterized in that including fixed frame and at least one display module, the display module is fixed
In on the fixed frame, the display module is the described in any item display modules of claim 4-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810855359.5A CN109118970B (en) | 2018-07-31 | 2018-07-31 | Face guard, display module assembly and LED display screen |
| PCT/CN2019/075703 WO2020024579A1 (en) | 2018-07-31 | 2019-02-21 | Mask, display module and led display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810855359.5A CN109118970B (en) | 2018-07-31 | 2018-07-31 | Face guard, display module assembly and LED display screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109118970A true CN109118970A (en) | 2019-01-01 |
| CN109118970B CN109118970B (en) | 2021-09-24 |
Family
ID=64862385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810855359.5A Active CN109118970B (en) | 2018-07-31 | 2018-07-31 | Face guard, display module assembly and LED display screen |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109118970B (en) |
| WO (1) | WO2020024579A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020024579A1 (en) * | 2018-07-31 | 2020-02-06 | 深圳市奥拓电子股份有限公司 | Mask, display module and led display screen |
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| WO2020024579A1 (en) * | 2018-07-31 | 2020-02-06 | 深圳市奥拓电子股份有限公司 | Mask, display module and led display screen |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109118970B (en) | 2021-09-24 |
| WO2020024579A1 (en) | 2020-02-06 |
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