CN109841164A - Small spacing LED display module and preparation method thereof - Google Patents
Small spacing LED display module and preparation method thereof Download PDFInfo
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- CN109841164A CN109841164A CN201711230775.8A CN201711230775A CN109841164A CN 109841164 A CN109841164 A CN 109841164A CN 201711230775 A CN201711230775 A CN 201711230775A CN 109841164 A CN109841164 A CN 109841164A
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Abstract
The present invention provides a kind of small spacing LED display modules and preparation method thereof.The small spacing LED display module includes installation base plate, LED lamp panel and protecting colloid; LED lamp panel includes circuit board and multiple LED for being arranged at intervals on circuit board; circuit board is arranged on a side surface of installation base plate, and LED is arranged on a side surface of the separate installation base plate of circuit board；Protecting colloid is arranged in the gap between each LED, and surface and LED flush far from circuit board side of the protecting colloid far from circuit board side.Protecting colloid can play a very good protection to each LED, can effectively prevent LED knock lamp and because moisture it is excessive caused by dead lamp problem.Simultaneously as surface and LED flush far from circuit board side of the protecting colloid far from circuit board side, so that the cleaning of LED light plate surface is more easy.In addition, the processing method of the protecting colloid is simple, and it is easy to process reliable, it is suitable for industrialization large-scale application.
Description
Technical field
The present invention relates to technical field of LED display, in particular to a kind of small spacing LED display module and its production
Method.
Background technique
LED display is made of LED dot matrix, and text, picture are shown by the light on and off of lamp bead, and content can at any time more
It changes, each section component is all the display device of modular construction.LED display module generally includes installation base plate and LED lamp panel,
LED lamp panel includes the LED of circuit board and multiple array arrangements on circuit board, according to the size of spacing between LED, LED
Display module is divided into big spacing type and small spacing type.
For small spacing LED display module, itself has non-water-tight characteristic, while the welding force of LED is small, leans on
Low beam edges of boards edge is easy to appear which results in exposed LED display module and knocks lamp, easy to clean is not allowed on surface, LED moisture is excessive
When will appear the variety of problems such as dead lamp, this just needs to be packaged it.The existing encapsulation for small spacing LED display module
Be mainly the following mode: 1) COB sealing adhesive process: the technique is big in the presence of deformation, technology controlling and process is difficult, yield rate is lower asks
Topic.2) be packaged using whole glass or plastic plate: the size of this method LED display module is easy to be limited to, and installs, fortune
It is defeated relatively difficult.3) coating process: higher cost.
Based on the above reasons, it is necessary to provide a kind of simple and reliable, lower-cost small spacing LED display module structure and
Production method.
Summary of the invention
It is existing to solve the main purpose of the present invention is to provide a kind of small spacing LED display module and preparation method thereof
Small spacing LED display module low, at high cost problem of existing reliability in terms of LED process for protecting in technology.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of small spacing LED display module,
It include: installation base plate；LED lamp panel, LED lamp panel include circuit board and multiple LED for being arranged at intervals on circuit board, and circuit board is set
It sets on a side surface of installation base plate, LED is arranged on a side surface of the separate installation base plate of circuit board；And protective glue
Body, protecting colloid are arranged in the gap between each LED, and surface of the protecting colloid far from circuit board side and LED are far from electricity
The flush of road plate side.
Further, protecting colloid is the hardening colloid formed after normal temperature cured type glue is cured.
Further, normal temperature cured type glue is selected from resin glue, and preferred resin glue is epoxide-resin glue and/or modified silicon
Glue, it is preferable that coloring agent and/or diffusant are added in resin glue.
According to another aspect of the present invention, a kind of production method of small spacing LED display module is additionally provided comprising with
Lower step: installation base plate is provided；LED lamp panel is set on a side surface of installation base plate, and LED lamp panel includes circuit board and interval
Multiple LED on circuit boards are set, and circuit board is arranged on a side surface of installation base plate, and the remote of circuit board is arranged in LED
From on a side surface of installation base plate；Encapsulating is carried out to the side of the separate installation base plate of LED lamp panel using glue；Utilize plate
The side for carrying glue is pressed, so that glue is entered in the gap between each LED and is squeezed out extra glue, then
Solidified to form protecting colloid, and then forms Prefabricated block；And the plate in removal Prefabricated block, form small spacing
LED display module.
Further, encapsulating process carries out in vacuum environment.
Further, the step of encapsulating includes: that the upper side using glue rifle in the separate installation base plate of LED lamp panel carries out
It moves back and forth, carries out plastic emitting while moving back and forth.
Further, glue is normal temperature cure glue, and preferably normal temperature cure glue is selected from resin glue, and preferred resin glue is ring
Oxygen resin glue and/or modified silica-gel, it is preferable that coloring agent and/or diffusant are added in resin glue.
Further, plate is tempering film or plastic plate, and preferably plastic plate is polycarbonate plate or acrylic board.
Further, tempering film with a thickness of 0.2~1mm, plastic plate with a thickness of 0.1~1.0mm.
Further, the pressure in bonding processes is 0.005~0.04MPa, the curing time in solidification process is 0.5~
6h。
The present invention provides a kind of small spacing LED display modules comprising installation base plate, LED lamp panel and protecting colloid,
LED lamp panel includes circuit board and multiple LED for being arranged at intervals on circuit board, and a side surface of installation base plate is arranged in circuit board
On, LED is arranged on a side surface of the separate installation base plate of circuit board；Protecting colloid is arranged in the gap between each LED,
And surface and LED flush far from circuit board side of the protecting colloid far from circuit board side.
Above-mentioned small spacing LED display module provided by the invention is provided with protecting colloid in the gap between each LED,
And surface and LED flush far from circuit board side of the protecting colloid far from circuit board side.In this way, being located in gap
Protecting colloid can play a very good protection to each LED, can effectively prevent LED knock lamp and because moisture it is excessive caused by
Dead lamp problem.Simultaneously as surface and LED flush far from circuit board side of the protecting colloid far from circuit board side,
The cleaning that this allows for LED light plate surface is more easy.In addition, the processing method of the protecting colloid is simple, it only need to be whole by glue
The glue that excess surface is cleared up after body encapsulating to the gap between LED, is then solidified.It is easy to process reliable, it is suitable for
Industrialize large-scale application.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the structural schematic diagram of small spacing LED display module according to an embodiment of the present invention；
Fig. 2 shows the enlarged drawings at the upper surface A of small spacing LED display module structure shown in FIG. 1；
Fig. 3 shows the cross-sectional view of small spacing LED display module structure shown in FIG. 1；
Fig. 4 shows the signal of encapsulating process in the small spacing LED display module production method of an embodiment of the present invention
Figure；
Fig. 5 shows plate bonding processes in the small spacing LED display module production method of an embodiment of the present invention
Schematic diagram；
Fig. 6 shows the signal of solidification process in the small spacing LED display module production method of an embodiment of the present invention
Figure；
Fig. 7 shows in the small spacing LED display module production method of an embodiment of the present invention and removes in Prefabricated block
The schematic diagram of plate process；
The moire fringes that Fig. 8 shows the small spacing LED display module of the production of the embodiment of the present invention 1 show image；
The moire fringes that Fig. 9 shows the small spacing LED display module of the production of comparative example 1 show image.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
As described in background technology part, small spacing LED display module is in terms of LED process for protecting in the prior art
There is a problem of that complex process, reliability are low, at high cost.
In order to solve this problem, the present invention provides a kind of small spacing LED display modules, as shown in Figure 1,2 and 3, should
Small spacing LED display module includes installation base plate 10, LED lamp panel 20 and protecting colloid 30, and LED lamp panel 20 includes 21 He of circuit board
The multiple LED22 being arranged at intervals on circuit board 21, circuit board 21 are arranged on a side surface of installation base plate 10, and LED22 is set
It sets on a side surface of the separate installation base plate 10 of circuit board 21；Protecting colloid 30 is arranged in the gap between each LED22,
And surface and LED22 flush far from circuit board 21 side of the protecting colloid 30 far from 21 side of circuit board.
Above-mentioned small spacing LED display module provided by the invention is provided with protective glue in the gap between each LED22
Body, and surface and LED flush far from circuit board 21 side of the protecting colloid 30 far from 21 side of circuit board.In this way, position
Protecting colloid in gap can play a very good protection to each LED22, can effectively prevent LED22 knock lamp and because
Dead lamp problem caused by moisture is excessive.Simultaneously as surface and LED22 of the protecting colloid far from 21 side of circuit board are far from circuit
The flush of 21 side of plate, the cleaning that this allows for LED light plate surface are more easy.In addition, the processing side of the protecting colloid
Formula is simple, and the glue of excess surface need to will be only cleared up after glue entirety encapsulating to the gap between LED22, is then solidified i.e.
It can.It is easy to process reliable, it is suitable for industrialization large-scale application.
It should be noted that in the actual use process, need to assemble multiple small spacing LED display modules,
Form biggish LED display.Other than the above beneficial effect, above-mentioned small spacing LED display module provided by the invention, by
In surface and LED22 flush far from circuit board 21 side of the protecting colloid 30 far from 21 side of circuit board, so that different
After small spacing LED display module is assembled, the light-emitting angle of the LED22 on disparate modules is identical, this can also be effectively improved biography
The glare problem occurred in system protection process, can be effectively reduced the moire fringes effect of LED display, improves its optical property.
In a preferred embodiment, protecting colloid 30 is the curable paste formed after normal temperature cured type glue is cured
Body.The problems such as selecting normal temperature cured type glue that can be further simplified technique, and being beneficial to prevent heat distortion.Preferably, often
Warm curing type glue is selected from resin glue, and preferred resin glue is epoxide-resin glue and/or modified silica-gel.When above-mentioned several glue curings
Between and viscosity it is more suitable, in specific process, the seam between LED22 can be rapidly filled with by good mobility
Gap, and extra glue also can be rapidly cleaned.Preferably, coloring agent and/or diffusant are added in resin glue, in this way
It is more advantageous to glue and enters gap.
According to another aspect of the present invention, a kind of production method of small spacing LED display module is additionally provided comprising with
Lower step: installation base plate 10 is provided；LED lamp panel 20 is set on a side surface of installation base plate 10, and LED lamp panel 20 includes circuit
Plate 21 and the multiple LED being arranged at intervals on circuit board 21, circuit board 21 are arranged on a side surface of installation base plate 10,
LED22 is arranged on a side surface of the separate installation base plate 10 of circuit board 21；Separate installation using from glue to LED lamp panel 20
The side of substrate 10 carries out encapsulating；The side for carrying glue is pressed using plate, enters glue between each LED22
Gap in and extra glue squeezed out, then solidified to form protecting colloid 30, and then form Prefabricated block；It removes
Plate in Prefabricated block forms small spacing LED display module.
Above-mentioned production method simple and reliable process provided by the invention, as shown in figure 4, during encapsulating, glue energy
Enough flow into the spaced slot in LED lamp panel 20 between each LED22, should during, in addition to the glue that flows between each LED22 with
Outside, there are also some glue can stay in above LED22, is pressed using plate b to the side for carrying glue, can make glue
It is further filled in the gap between each LED22, and extra glue is squeezed out into (as shown in Figure 5).Squeeze out extra glue it
Afterwards, as shown in fig. 6, being solidified in the state of pressing plate pressing to form protecting colloid 30, and then Prefabricated block is formd.Its
It is secondary, as shown in fig. 7, small spacing LED display module, the display module can be obtained after the plate b in Prefabricated block is removed
In, surface and LED22 flush far from circuit board 21 side of the protecting colloid 30 far from 21 side of circuit board.Positioned at gap
In protecting colloid 30 can play a very good protection to each LED22, can effectively prevent LED22's to knock lamp and because of moisture
Dead lamp problem caused by excessive.Simultaneously as surface and LED22 of the protecting colloid far from 21 side of circuit board are far from circuit board 21
The flush of side, the cleaning that this allows for LED light plate surface are more easy.In addition, the processing method of the protecting colloid 30
Simply, convenient and reliable, it is not necessarily to complex device, is suitable for industrialization large-scale application.
In the actual use process, it needs to assemble multiple small spacing LED display modules, forms biggish LED
Display screen.Other than the above beneficial effect, above-mentioned small spacing LED display module provided by the invention, due to protecting colloid 30
The flush of surface and LED22 far from 21 side of circuit board far from 21 side of circuit board, so that different small spacing LED are shown
After module is assembled, the light-emitting angle of the LED22 on disparate modules is identical, this goes out during capable of being also effectively improved traditional defense
Existing glare problem can be effectively reduced the moire fringes effect of LED display, improve its optical property.
In addition, it should be noted that, inevitably having a small amount of glue during the pressing of above-mentioned plate and remaining in
Above LED22, however, remaining a small amount of glue also will form smooth due to the mode that the present invention is pressed using plate
One layer, one layer of extremely thin glue-line of thickness is formed in the upper surface LED after solidification, very little is influenced for the optical property of module.
It, can be outer to requiring to carry out LED display module according to size after protecting colloid 30 to be formed in actual manufacturing process
Shape cutting.
In a preferred embodiment, encapsulating process carries out in vacuum environment.Be conducive in this way remove LED22 between
Air in gap reduces bubble, glue is made more fully to be full of gap.
In a preferred embodiment, as shown in figure 4, the step of encapsulating includes: using glue rifle a in LED lamp panel 20
A upper side of separate installation base plate 10 move back and forth, carry out plastic emitting while moving back and forth.Encapsulating is carried out in this way,
Glue can flow into gap more stablely, and the bubble generated in plastic emitting process and glue flow process is seldom, is conducive to mention
The globality of high protecting colloid 30, can play the role of providing better protection against to each LED22.
In a preferred embodiment, glue is normal temperature cure glue, selects normal temperature cured type glue can be into one
It walks and simplifies technique.Preferably, normal temperature cured type glue is selected from resin glue, and preferred resin glue is epoxide-resin glue and/or changes
Property silica gel.Above-mentioned several glue curing times and viscosity are more suitable, in specific process, by good mobility
It can be rapidly filled with the gap between LED22, and extra glue also can be rapidly cleaned.Preferably, add in resin glue
Added with coloring agent and/or diffusant.
In a preferred embodiment, plate b be tempering film or plastic plate, preferably plastic plate be polycarbonate plate or
Acrylic board.Above-mentioned several plate planarizations are preferable, can further increase the globality and planarization of protecting colloid 30.Together
When, the cohesive force between these types of plate and colloid is smaller, after curing can be more easily from LED22 and protecting colloid 30
Surface remove.
In a preferred embodiment, tempering film with a thickness of 0.2~1mm, plastic plate with a thickness of 0.1~
1.0mm.The plate b of thickness in this way is easier to remove from the surface of LED22 and protecting colloid 30, is conducive to further decrease processing
Difficulty.
The technological parameter of specific bonding processes and solidification process can be adjusted.In a kind of preferred embodiment
In, the pressure in bonding processes is 0.005~0.04MPa, and the curing time in solidification process is 0.5~6h.Specifically grasping
During work, solidified as shown in fig. 6, can be pushed down above plate b with briquetting c in solidification process, after curing completely is again
Briquetting c is moved out, plate b is removed.In addition, carrying out glue due to the mode that the present invention is pressed using plate
Before solidification, plate can be pressed and carry out secondary adjustment, this makes it possible to be more thoroughly discharged plate and glue, LED22 it
Between gas, keep LED22 and the upper surface of protecting colloid 30 more smooth consistent.
Beneficial effects of the present invention are further illustrated below according to embodiment:
Embodiment 1
The embodiment has made small spacing LED display module, the specific process is as follows:
The LED lamp panel of model TVH2.5 being arranged on installation base plate is selected, the point spacing of LED is 2.5mm, size
For 200 × 150mm；
Encapsulating is carried out to the side of the separate installation base plate of LED lamp panel using normal-temperature curing epoxy resin glue；
Secondly, being pressed (pressure to the side for carrying glue using polytetrafluoroethylene (thickness 1mm)
0.04MPa), so that glue is entered in the gap between each LED and is squeezed out extra glue, solidified (6h) then to be formed
Protecting colloid, and then form Prefabricated block.
The matte board in Prefabricated block is removed, small spacing LED display module is formed.
The performance of above-mentioned small spacing LED display module is characterized, it is anti-with reflectivity detector test Modular surface
Penetrate rate, it is seen that light reflectivity 0.2%.The small spacing LED display module original image is converted into gray level image, then through Fu
In the obtained moire fringes of leaf transformation show that image is as shown in Figure 8.
Embodiment 2
The manufacture craft of small spacing LED display module is with embodiment 1 in the embodiment, the difference is that:
Polytetrafluoroethylene thickness 0.1mm, pressing pressure 0.005MPa, curing time 0.5h.To above-mentioned small spacing
The performance of LED display module is characterized, it is seen that light reflectivity 1%.
Comparative example 1
The comparative example has made small spacing LED display module, the specific process is as follows:
The LED lamp panel of model TVH2.5 being arranged on installation base plate is selected, the point spacing of LED is 2.5, having a size of
200×150mm；
LED lamp panel is packaged using glass, thickness of glass 2mm, forms small spacing LED display module.
The performance of above-mentioned small spacing LED display module is characterized, it is anti-with reflectivity detector test Modular surface
Penetrate rate, it is seen that light reflectivity 8%.The small spacing LED display module original image is converted into gray level image, then through in Fu
The moire fringes that leaf transformation obtains show that image is as shown in Figure 9.
From the above data, the small spacing LED display module made in the embodiment of the present invention, it is seen that light reflectivity is obvious
It reduces, this can effectively weaken because of the defect that strong light guide causes picture to bleach behind, show image and be more clear.In addition, by Fig. 8
Comparison between Fig. 9 is it is found that the small spacing LED display module that the present invention makes, moire fringes obviously weaken.As it can be seen that moire fringes
Obvious weakening is obtained.In short, the small spacing LED display module that the present invention makes has better optical property.In addition, this hair
It is bright for small spacing LED display module LED process for protecting is simple, high reliablity, cost are also lower.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
Above-mentioned small spacing LED display module provided by the invention is provided with protecting colloid in the gap between each LED,
And surface and LED flush far from circuit board side of the protecting colloid far from circuit board side.In this way, being located in gap
Protecting colloid can play a very good protection to each LED, can effectively prevent LED knock lamp and because moisture it is excessive caused by
Dead lamp problem.Simultaneously as surface and LED flush far from circuit board side of the protecting colloid far from circuit board side,
The cleaning that this allows for LED light plate surface is more easy.In addition, the processing method of the protecting colloid is simple, it only need to be whole by glue
After body encapsulating to the gap between LED, the glue of excess surface is cleared up in the way of plate pressing, is then solidified i.e.
It can.It is easy to process reliable, it is suitable for industrialization large-scale application.
Specifically, the production method of small spacing LED display module provided by the invention has following advantage:
Simple process, operation are easy, and do not need complicated die and tooling, investment is smaller, at low cost；
Verification time is short (using mold, repetition test, the period is long)；
High reliablity, in particular by normal temperature cure glue, it is i.e. curable to be not required to heating, protects the deformation of glue-line small, no
LED can be damaged；
Before solidification can it is secondary adjustment press mold situation, thoroughly solve bubble；
For the plate of pressing, it can be used repeatedly, and Modular surface consistency is high, ensure that the optical of LED display module
Energy.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of small spacing LED display module characterized by comprising
Installation base plate (10)；
LED lamp panel (20), the LED lamp panel (20) include circuit board (21) and are arranged at intervals on more on the circuit board (21)
A LED (22), the circuit board (21) are arranged on a side surface of the installation base plate (10), and LED (22) setting exists
On the side surface far from the installation base plate (10) of the circuit board (21)；And
Protecting colloid (30), protecting colloid (30) setting is in the gap between each LED (22), and the protective glue
Surface and the LED (22) surface far from the circuit board (21) side of the body (30) far from the circuit board (21) side is flat
Together.
2. small spacing LED display module according to claim 1, which is characterized in that the protecting colloid (30) is room temperature
The hardening colloid formed after curing type glue is cured.
3. small spacing LED display module according to claim 2, which is characterized in that the normal temperature cured type glue is selected from
Resin glue, the preferably described resin glue are epoxide-resin glue and/or modified silica-gel, it is preferable that added with dyeing in the resin glue
Agent and/or diffusant.
4. the production method of small spacing LED display module according to any one of claim 1 to 3, which is characterized in that packet
Include following steps:
It provides installation base plate (10)；
LED lamp panel (20) are set on a side surface of the installation base plate (10), the LED lamp panel (20) includes circuit board
(21) it is arranged with multiple LED (22) for being arranged at intervals on the circuit board (21), the circuit board (21) in the installation base
On one side surface of plate (10), one far from the installation base plate (10) of LED (22) setting in the circuit board (21)
On side surface；
Encapsulating is carried out to the side far from the installation base plate (10) of the LED lamp panel (20) using glue；
The side for carrying the glue is pressed using plate, enters the glue between each LED (22)
It squeezes out, is then solidified to be formed protecting colloid (30) in gap and by the extra glue, and then form Prefabricated block；
And
The plate in the Prefabricated block is removed, the small spacing LED display module is formed.
5. production method according to claim 4, which is characterized in that the encapsulating process carries out in vacuum environment.
6. production method according to claim 5, which is characterized in that the step of encapsulating includes: using glue rifle in institute
The upper side far from the installation base plate (10) for stating LED lamp panel (20) moves back and forth, in the same of the reciprocating motion
Shi Jinhang plastic emitting.
7. the production method according to any one of claim 4 to 6, which is characterized in that the glue is normal temperature cure glue
Water, the preferably described normal temperature cure glue be selected from resin glue, the preferably described resin glue be epoxide-resin glue and/or modified silica-gel, it is excellent
Selection of land is added with coloring agent and/or diffusant in the resin glue.
8. the production method according to any one of claim 4 to 6, which is characterized in that the plate is tempering film or modeling
Flitch, the preferably described plastic plate are polycarbonate plate or acrylic board.
9. production method according to claim 8, which is characterized in that the tempering film with a thickness of 0.2~1.0mm, institute
State plastic plate with a thickness of 0.1~1.0mm.
10. production method according to claim 8, which is characterized in that pressure in the bonding processes is 0.005~
0.04MPa, the curing time in the solidification process are 0.5~6h.
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| CN110299083A (en) * | 2019-06-12 | 2019-10-01 | 厦门强力巨彩光电科技有限公司 | A kind of LED display glue-pouring method |
| CN111312885A (en) * | 2020-04-06 | 2020-06-19 | 深圳市洲明科技股份有限公司 | LED display module glue filling process, glue pumping device and LED display module |
| CN111477121A (en) * | 2020-05-26 | 2020-07-31 | 深圳市洲明科技股份有限公司 | Manufacturing method of L ED display screen |
| CN111589669A (en) * | 2020-06-18 | 2020-08-28 | 深圳市洲明科技股份有限公司 | LED display module lamp seam glue pouring method and system |
| CN112150936A (en) * | 2019-06-28 | 2020-12-29 | 深圳市洲明科技股份有限公司 | LED display module and glue filling method thereof |
| CN113036021A (en) * | 2021-03-09 | 2021-06-25 | 北京柒彩智显科技有限公司 | LED (light emitting diode) bottom filling process |
| CN113611224A (en) * | 2021-08-18 | 2021-11-05 | 深圳市众联智强科技有限公司 | LED display screen gap filling method |
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Application publication date: 20190604 |