CN106683578A - LED display screen capable of eliminating color difference among modules and manufacturing method of LED display screen - Google Patents
LED display screen capable of eliminating color difference among modules and manufacturing method of LED display screen Download PDFInfo
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- CN106683578A CN106683578A CN201611087436.4A CN201611087436A CN106683578A CN 106683578 A CN106683578 A CN 106683578A CN 201611087436 A CN201611087436 A CN 201611087436A CN 106683578 A CN106683578 A CN 106683578A
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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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Abstract
The invention relates to an LED display screen capable of eliminating the color difference among modules and a manufacturing method of the LED display screen. The LED display screen is formed by splicing multiple LED display units. The LED display units can be LED display modules or display modules formed by splicing multiple LED display modules or display boxes formed by splicing multiple display modules. One-way perspective layers are attached to the front faces of the LED display units, the thickness of the one-way perspective layers ranges from 0.05 mm to 0.15 mm, and the transmittance ranges from 60% to 80%. Metal coatings are evaporated on packaging glue, anti-dazzling layers are sprayed on the metal coatings, and transparent protective films are sprayed on the anti-dazzling layers. When the LED display screen does not display images, the one-way perspective layers can cover up the color difference, caused by the bottom color of a drive circuit board and the colors of packaging glue layers, among the display modules, meanwhile, the influences of white line traces at the module spliced positions are eliminated, and the overall appearance effect of the LED display screen is improved. The LED display screen is simple in structure and easy to achieve.
Description
Technical field
The invention belongs to the technical field of LED display, be related to it is a kind of can between cancellation module heterochromia LED display
And its manufacture method.
Background technology
As LED core chip size can accomplish less rank (0505mil), its corresponding LED display technique is constantly carried
Rise, the dot spacing of current LED display main product has formed in the market P1.5 dot spacings LED and shown also in shortened
The mass production and application of display screen, while in P1.25-P0.8 spacing field, its research and development and production specifications are also continuous
It is perfect, it is contemplated that its mass production can be realized in following 2-3.
LED Small Distances Display Technique with its colour gamut extensively, contrast and high resolution, display brightness it is high, it is seamless spliced easily
In technical characterstics such as maintenances, the DLP splicings commonly used in indoor display field, LCD is just progressively being replaced to splice.Simultaneously in large scale system
Formula screen aspect is also to available liquid crystal technological maheup competitive advantage.To sum up Small Distance LED display has the wide market space.
In LED Small Distances field, at present country's main product is based on Surface Mount technology.Surface mount product technology is excellent
Gesture has at 2 points：First, being " mixing " that product surface Mount Device is easily achieved finished product end, the homogenization effect of whole screen is realized
Really；Second, seamless spliced effect between module can be realized using surface discrete device.
But it is limited in surface mount package device architecture, existing industrial equipment ability and (makes ability, device including chip
Part base plate for packaging makes precision, die bond bonding wire, screening installation, SMT equipment etc.), further reduce point and be difficult to away from aspect.
And while an other technology path be with the integrated Small Distances of COB be encapsulated as represent integration packaging technology, its technology is less
There is natural technical advantage in spacing field.Its technology path is that chip is directly installed on pcb board, forms integrated array envelope
Dress, be advantageously implemented less point away from integration packaging.
But because in COB integration packagings, by being affected from pcb board background color and glue-line color, it is encapsulated module
Afterwards there is heterochromia in module, simultaneously because module splicing, in stitching portion it is observed that white line vestige, white line is because module exists
In the case of details in a play not acted out on stage, but told through dialogues, after ambient intake glue-line, concentrate again observed by human eye caused by reflection in module splicing edge edge
White line effect, affects LED display appearance.At present mass colour and module are covered using COB surface coatings technology in industry
Between white line problem, but overall overlay film is limited only to small size display screen, and for larger indoor display screen, it still has stitching portion
There is white bright line problem, while overall overlay film is unfavorable for the monolithic maintenance in casing.How module mass colour and splicing are solved
Place's white line problem, while realizing that integrated COB modules rapid-maintenance is the difficult problem that current COB encapsulates industrialization.
The content of the invention
The technical problem to be solved in the present invention be to provide it is a kind of can between cancellation module heterochromia LED display, this shows
Display screen can not only eliminate the heterochromia existed between each encapsulation display module, while being capable of the white line of cancellation module stitching portion
Vestige.
In order to solve above-mentioned technical problem, the present invention can between cancellation module heterochromia LED display by multiple LED
Display unit is spliced, it is characterised in that the LED display unit front is attached with single plane fluoroscopy layer, and its thickness is in 0.05-
Between 0.15mm, transmitance is between 60%-80%.
The single plane fluoroscopy layer is Double sided mirror reflectance coating.
The single plane fluoroscopy layer is regular reflection film.
The single plane fluoroscopy layer is silver color or brown.
The LED display unit be LED display module, the display module that is spliced by multiple LED display modules or by
The display casing that multiple display modules are spliced.
The LED display module includes drive circuit board, drives IC, LED module, packaging plastic；IC is driven to be welded on drive
The back side of dynamic circuit board, LED module is fixed on the front of drive circuit board, and packaging plastic is attached to the front of drive circuit board；
Single plane fluoroscopy layer is attached on packaging plastic.
Described single plane fluoroscopy layer is regular reflection film, and it includes the coat of metal, antiglare layer, transparent protective film；Metal-plated
Layer is covered on packaging plastic, and its thickness is 0.01~0.02mm；Antiglare layer is covered on the coat of metal, its thickness be 0.01~
0.03mm；Transparent protective film is covered in antiglare layer, and its thickness is 0.03~0.1mm.
It is above-mentioned can between cancellation module the LED display of heterochromia manufacture method, comprise the steps：
First, vacuum package device is utilized, packaging plastic is potted in into the surface for being fixed with LED module of drive circuit board；
2nd, silver is deposited with packaging plastic, as the coat of metal by the way of vacuum coating；
3rd, the polyurethane acrylate resin containing anti-dazzle particle is sprayed on the coat of metal using UV coating equipments,
Used as antiglare layer, anti-dazzle particle is plexiglass microgranule.
4th, using PET basement membranes, as transparent protective film；
The vacuum package device includes vacuum chamber, and pedestal, model external member, glue injection machine, straight line driving mechanism, glue is scraped
Plate, glue collecting tank；The pedestal is located at the bottom of vacuum chamber, is fixed with and drives the drive circuit board of IC and LED die to put
Put on pedestal, model external member is placed on drive circuit board, and drive circuit board front needs to cover the portion of sealed colloid
Divide in the die cavity of model external member；Glue scraper plate be located at model external member on and with the power output part of straight line driving mechanism
Connection；Glue scraper plate bottom is horizontal linear shape, and the plane contact of the die cavity both sides of the two ends of its bottom and model external member；Note
Glue device is fixed in vacuum chamber and is located at the top of model external member；The left side of model external member, front side, rear side carry box dam, bottom
Portion has die cavity, and die cavity is corresponding to the shape of fluid sealant and size；Glue collecting tank is located at the lower right-hand side of model external member.
PCB cell boards (being fixed with the drive circuit board of driving IC and LED die) to be packaged are put into into vacuum chamber
Inside fix, putting down model external member makes it be brought into close contact with PCB cell boards to be packaged；Evacuation is carried out to vacuum chamber, and
Keep vacuum environment (vacuum is -0.1Mpa)；High thixotropic glue is filled inside model external member, certain hour is kept, etc.
Treat bubble-free in high thixotropic glue；Glue scraper plate is driven to move from left to right along model external member surface using straight line driving mechanism
It is dynamic to carry out frictioning process, the high thixotropic glue for being higher by model external member die cavity is struck off, the glue for striking off is incorporated into be received in glue
In collection groove；High thixotropic glue is heating and curing, hardening time, 5-8min, after solidification, released vacuum；Model external member is taken off
Mould is removed, and takes out packaged display unit, and being put into baking box carries out long-time solidification.
When LED display not display image, to external world light plays certain reflection to single plane fluoroscopy layer, so as to cover
The heterochromia covered between each display module that drive circuit board background color and encapsulation glue-line color belt come, while eliminating module
The impact of the white line vestige of stitching portion, improves the overall appearance effect of LED display.Single plane fluoroscopy thickness degree is selected in 0.08-
Between 0.2mm, i.e., the white line vestige of heterochromia between each display module and module stitching portion can be eliminated, can be taken into account again aobvious
Display screen effectively radiates；Single plane fluoroscopy layer transmitance is selected between 60%-80%, can make LED display image display effect
It is unaffected；When LED display unit is LED display module, be conducive to the maintenance of monolithic LED display module in show case body,
Such that it is able to realize the rapid-maintenance of integrated LED display module.Present configuration is simple, easily realizes；By in vacuum environment
The characteristic of lower utilization model external member and high thixotroping glue, realizes in vacuum environment to the direct of integration packaging LED display unit
Encapsulation, realizes the optimization of encapsulation, and implementation method is simple, while the high concordance of display unit can be realized.
Description of the drawings
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Fig. 1 be the present invention can between cancellation module the LED display of heterochromia structural representation.
Fig. 2 is the partial enlarged drawing of Fig. 1.
Fig. 3 is the front view of vacuum package device.
Fig. 4 is the right view of Fig. 3.
Fig. 5 is the top view of model external member.
Fig. 6 is the sectional view of model external member.
Specific embodiment
As shown in figure 1, the present invention's the LED display of heterochromia can be spelled between cancellation module by multiple LED display units
Connect and form, the LED display unit is LED display module.LED display module includes drive circuit board 21, at least one piece driving
IC22 and LED module 23.IC2 is driven to be arranged on the back side of drive circuit board 21, LED module 23 is arranged on drive circuit board
21 front.Specifically, each LED module 23 includes three LED chips of red, green, blue, and red, green, blue LED chip in straight
Line is arranged.More specifically, red, green, blue LED chip is directly encapsulated into the front of drive circuit board 21 by COB encapsulation technologies.To enter
One step protects red, green, blue LED chip, plays electrical isolation effect, covers in the front of whole drive circuit board 21 and is provided with envelope
Dress glue 24；The surface attachment of packaging plastic 24 has single plane fluoroscopy layer 25.Single plane fluoroscopy layer 25 can be affixed directly to packaging plastic 24
Surface, it would however also be possible to employ vacuum coating mode is covered on packaging plastic 24.
Embodiment 1
For dot spacing d=1.5mm, resolution is the dot matrix arrangement integration packaging LED display module of 80*80.
As shown in figure 1, integration packaging LED display module includes driving IC22, drive circuit board 21, LED module 23, envelope
Dress glue 24, drives IC22 to be welded on the back side of drive circuit board 21, and LED module 23 is being fixed on drive circuit board 21 just
Face, wherein blue, green LED core chip size is：7mils*9mils, red LED core chip size is 6mils*6mils.The thickness of packaging plastic 24
Degree does not carry out specific restriction.Packaging plastic 24 adopts epoxide resin AB glue, and the wherein ratio of component A and B component is 2:1.Packaging plastic
Add scattering diluent in 24, wherein scattering diluent ratio is the 5.3%-10.6% of epoxide resin AB glue gross mass.The surface of packaging plastic 24
The single plane fluoroscopy layer 25 of stickup is Double sided mirror reflectance coating, and its thickness is 0.1mm, and color is silver color.
In the present embodiment, due to the surface bonding Double sided mirror reflectance coating of packaging plastic 24, each display module mass colour is covered firmly, together
When adjacent display modules stitching portion do not observe splicing white line, but because the Double sided mirror reflectance coating transmitance is low, about 30% passes through
Rate, reduces the luminosity of LED display.
Embodiment 2
For dot spacing d=1.5mm, resolution is the dot matrix arrangement integration packaging LED display module of 80*80.
As shown in figure 1, integration packaging LED display module includes driving IC22, drive circuit board 21, LED module 23, envelope
Dress glue 24, drives IC22 to be welded on the back side of drive circuit board 21, and LED module 23 is being fixed on drive circuit board 21 just
Face, wherein blue, green LED core chip size is：7mils*9mils, red LED core chip size is 6mils*6mils.The thickness of packaging plastic 24
Degree does not carry out specific restriction.The packaging plastic 24 of the integration packaging LED display module adopts epoxide resin AB glue, wherein component A and B
The ratio of component is 2:1.Add scattering diluent in packaging plastic 24, wherein scattering diluent ratio is epoxide resin AB glue gross mass
5.3%-10.6%.The single plane fluoroscopy layer 25 of the surface mount of packaging plastic 24 is regular reflection film, and its thickness is 0.05-0.15mm,
Color is silver color.
In the present embodiment, due to the surface bonding of packaging plastic 24, transmitance by the control of thickness can 60%-80% it
Between be adjusted, simultaneously because the regular reflection characteristic of regular reflection film, the mass colour of each display module can be covered directly, while
White line after each display module splicing under the details in a play not acted out on stage, but told through dialogues of stitching portion can also be eliminated, and be produced a desired effect.
Embodiment 3
For dot spacing d=1.5mm, resolution shows package module for the dot matrix arrangement integrated LED of 80*80.
As shown in figure 1, the integration packaging LED display module display package module include driving IC22, drive circuit board 21,
LED module 23, packaging plastic 24, drive IC22 to be welded on the back side of drive circuit board 21, and LED module 23 is fixed on driving
The front of circuit board 21, wherein blue, green LED core chip size is：7mils*9mils, red LED core chip size is 6mils*6mils.
The thickness of packaging plastic 24 does not carry out specific restriction.The packaging plastic 24 of the integration packaging LED display module adopts epoxide resin AB glue,
Wherein the ratio of component A and B component is 2:1.Add scattering diluent in packaging plastic 24, wherein scattering diluent ratio is epoxide resin AB glue
The 5.3%-10.6% of gross mass.Single plane fluoroscopy layer 25 is regular reflection film, and using vacuum coating mode packaging plastic 24 is covered in
On, regular reflection film thickness is controlled between 0.05-0.15mm.
In the present embodiment, because display module surface coats regular reflection film, transmitance can be by the control of thickness
It is adjusted between 60%-80%, simultaneously because regular reflection characteristic, the mass colour of each display module can be covered directly, while
White line after each display module splicing under the details in a play not acted out on stage, but told through dialogues of stitching portion can also be eliminated, and be produced a desired effect.Due to adopting coating method, can
To carry out multiple display modules while after overlay film, and plated film, display module directly can be used, and production efficiency is improved.
The invention is not restricted to above-described embodiment, the LED display unit therein can also be by multiple LED display modules
The display module being spliced or the display casing being spliced by multiple display modules.
As shown in Fig. 2 described single plane fluoroscopy layer is regular reflection film, it includes the coat of metal 51, antiglare layer 52, transparent
Protecting film 53；The coat of metal 51 is covered on packaging plastic 24, and its thickness is 0.01-0.02mm.Antiglare layer 52 is covered in metal-plated
On layer 51, its thickness is 0.01-0.03mm, and the layer plays the protective effects such as anti-dazzle, anti-soil, antistatic.Transparent protective film 53 covers
Cover in antiglare layer 52, its thickness is 0.03-0.1mm, this layer plays a part of to protect antiglare layer 52.
It is above-mentioned can between cancellation module the LED display of heterochromia manufacture method, specifically include following step：
First, vacuum package device is utilized, by what packaging plastic 24 was potted in drive circuit board 21 LED module 23 is fixed with
Surface；
2nd, silver is deposited with packaging plastic 24, as the coat of metal 51 by the way of vacuum coating；
3rd, will be containing the polyurethane propylene of anti-dazzle particle (plexiglass microgranule) using UV coating equipments
Acid ester resin is sprayed on the coat of metal 51, used as antiglare layer 52；
4th, using PET basement membranes, as transparent protective film 53.
As shown in Figure 3,4, the vacuum package device includes vacuum chamber 11, and pedestal 12, model external member 13, glue is collected
Groove 14, glue scraper plate 15, glue injection machine 16, straight line driving mechanism.
As shown in Figure 5,6, the left side of the model external member 13, front side, rear side carry box dam 132,134,135, bottom 131
With a die cavity 133, die cavity 133 is corresponding to the shape and size of fluid sealant 24.
The pedestal 12 is located at the bottom of vacuum chamber 11, and the circuit board 1 for driving IC2 and LED die 3 is fixed with when using
It is placed on pedestal 12, model external member 13 is placed on the circuit card 1, and the front of circuit board 1 needs to cover the portion of fluid sealant 24
Divide in the die cavity 133 of model external member 13.Glue collecting tank 14 is located at the bottom of vacuum chamber 11 and is located at model external member 13
Lower right-hand side.Glue scraper plate 15 is located in model external member 13, and its bottom is horizontal linear shape, and the two ends of its bottom and model set
The plane linear contact lay of the die cavity both sides of part 13.Straight line driving mechanism is made up of motor 172 and leading screw 171, one end of leading screw 171 with
The output shaft of motor 172 is fixedly connected, and glue scraper plate 15 is threadedly coupled with leading screw 171；Whole straight line driving mechanism can be fixed on
On the movable part of one elevating mechanism (not shown).Elevating mechanism is fixed in vacuum chamber 11.Glue injection machine 16 is consolidated
It is scheduled in vacuum chamber 11 and is located at the top of die cavity 133 of model external member 13.
Claims (8)
- It is 1. a kind of the LED display of heterochromia can be spliced by multiple LED display units between cancellation module, it is characterised in that The LED display unit front is attached with single plane fluoroscopy layer, and between 0.05-0.15mm, transmitance is in 60%-80% for its thickness Between.
- 2. it is according to claim 1 can between cancellation module heterochromia LED display, it is characterised in that it is described it is unidirectional thoroughly Layer is regarded as Double sided mirror reflectance coating.
- 3. it is according to claim 1 can between cancellation module heterochromia LED display, it is characterised in that it is described it is unidirectional thoroughly Layer is regarded as regular reflection film.
- 4. it is according to claim 1 can between cancellation module heterochromia LED display, it is characterised in that it is described it is unidirectional thoroughly Layer is regarded as silver color or brown.
- 5. it is according to claim 1 can between cancellation module heterochromia LED display, it is characterised in that the LED shows Show unit and splice for LED display module, the display module being spliced by multiple LED display modules or by multiple display modules and Into display casing.
- 6. it is according to claim 5 can between cancellation module heterochromia LED display, it is characterised in that the LED shows Show that module includes drive circuit board (21), drives IC (22), LED module (23), packaging plastic (24)；IC (22) is driven to be welded on The back side of drive circuit board (21), LED module (23) is fixed on the front of drive circuit board (21), and packaging plastic (24) is attached to The front of drive circuit board (21)；Single plane fluoroscopy layer (25) is attached on packaging plastic (24).
- 7. it is according to claim 6 can between cancellation module heterochromia LED display, it is characterised in that described is unidirectional Perspective layer is regular reflection film, and it includes the coat of metal (51), antiglare layer (52), transparent protective film (53)；The coat of metal (51) It is covered on packaging plastic (4), its thickness is 0.01~0.02mm；Antiglare layer is covered on the coat of metal (51), and its thickness is 0.01~0.03mm；Transparent protective film (53) is covered in antiglare layer (52), and its thickness is 0.03~0.1mm.
- 8. it is a kind of as claimed in claim 7 can between cancellation module the LED display of heterochromia manufacture method, its feature exists In comprising the steps：First, vacuum package device is utilized, by what packaging plastic (24) was potted in drive circuit board (21) LED module (23) is fixed with Surface；2nd, silver is deposited with packaging plastic (24), as the coat of metal (51) by the way of vacuum coating；3rd, the polyurethane acrylate resin containing anti-dazzle particle is sprayed on the coat of metal (51) using UV coating equipments, As antiglare layer (52)；4th, using PET basement membranes, as transparent protective film (53)；The vacuum package device includes vacuum chamber (11), and pedestal (12), model external member (13), glue injection machine (16), straight line drives Motivation structure, glue scraper plate (15), glue collecting tank (14)；The pedestal (12) is fixed with positioned at the bottom of vacuum chamber (11) IC (2) and the drive circuit board (1) of LED die (3) is driven to be placed on pedestal (12), model external member (13) is placed on driving electricity On road plate (1), and drive circuit board (1) front needs the part for covering fluid sealant (24) to be located at the die cavity of model external member (13) (133) in；Glue scraper plate (15) is connected on model external member (13) and with the power output part of straight line driving mechanism；Glue Water scraper plate (15) bottom is horizontal linear shape, and the plane of die cavity (133) both sides of the two ends of its bottom and model external member (13) Contact；Glue injection machine (16) is fixed in vacuum chamber (11) and is located at the top of model external member (13)；A left side for model external member (13) Side, front side, rear side carry box dam, the shape of bottom (131) with die cavity (133), die cavity (133) and fluid sealant (24) and size Accordingly；Lower right-hand side of the glue collecting tank (14) positioned at model external member (13).
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| CN201611087436.4A CN106683578A (en) | 2016-12-01 | 2016-12-01 | LED display screen capable of eliminating color difference among modules and manufacturing method of LED display screen |
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| CN201611087436.4A CN106683578A (en) | 2016-12-01 | 2016-12-01 | LED display screen capable of eliminating color difference among modules and manufacturing method of LED display screen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107633777A (en) * | 2017-10-12 | 2018-01-26 | 深圳市创显光电有限公司 | A kind of led display devices and its manufacture method |
| CN108777118A (en) * | 2018-07-06 | 2018-11-09 | 深圳市艾森视讯科技有限公司 | A kind of LED display modules and mosaic display screen |
| CN111681537A (en) * | 2020-06-24 | 2020-09-18 | 武汉华星光电技术有限公司 | Lamp panel, backlight module and display panel |
| WO2021120386A1 (en) * | 2019-12-20 | 2021-06-24 | 东莞阿尔泰显示技术有限公司 | Integrated-package display module |
| CN113683971A (en) * | 2021-08-06 | 2021-11-23 | 深圳市美成胶粘制品有限公司 | Functional film of LED display screen and preparation method thereof |
| CN116741062A (en) * | 2023-08-15 | 2023-09-12 | 长春希龙显示技术有限公司 | Packaging process method of LED display module and LED display module |
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