CN208442794U - LED display module - Google Patents
LED display module Download PDFInfo
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- CN208442794U CN208442794U CN201820940606.7U CN201820940606U CN208442794U CN 208442794 U CN208442794 U CN 208442794U CN 201820940606 U CN201820940606 U CN 201820940606U CN 208442794 U CN208442794 U CN 208442794U
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Abstract
A kind of saving material, control optical circuit board at low cost, and cooperate the simple pedestal disk of the structure of the control optical circuit board, and make the LED display module that assembling between the two is more efficient, flexural resistance is strong, circuit performance is stable and assembly efficiency is high.Control optical circuit board is made of several pieces of in a strip shape or block-like finished product circuit board assembly, any one finished product circuit board can intersect in plane and stacked on top of one another and be electrically connected assembling by stacked connection welding to other multiple related finished product circuit boards in control optical circuit board, and finished product circuit board is respectively functional module rigid plate, functional module flexible board and believes electrical transmission flexible board.The advantages of it realizes high voltage supply and powers over long distances and be combined into big scale of construction display screen.It realizes outside the building in high buildings and large mansions exterior wall, construction, in large-scale performance on-site tower with hang and all building externals if any smooth surfaces such as glass curtain walls with the Fast Installation of bonding method, repeat dismounting and the application such as recycle.
Description
Technical field
It is the utility model relates to a kind of LED display module, in particular to a kind of to be set on latticed flexible pedestal disk
Have by several be made finished product and can standardized circuit board assembly constitute control optical circuit board LED display module.
Background technique
In general, LED display module is all one whole complete circuit plate, the Surface Mount on its display surface (i.e. light sending face)
Or plug-in unit LED lamp bead, chipset is controlled in its back side Surface Mount or plug-in unit, this two sides arrangement, which is built upon circuit board, to be had enough
Two-way space for arranging printed circuit, later again by the circuit board that whole assembles be mounted on the exposed carton and crate of display surface or
The independent LED display module for being used for project installation is constituted in recessed disk.
This conventional topology layout, circuit board space is more roomy, and printed circuit allocation plan is simple and easy.But it is deposited
The shortcomings that be the back as LED display module of rigid support, metal or plastic casing for needing a large amount of bulky complex at high cost
Plate gives water proof and dust proof with support and to circuit board, and one integral piece is the rigid structure of closely knit overall structure or inflexibility.This
The LED display module of a little structure types also needs further when for the assembled display screen for constituting large area with the steel for building large size
Structure rack is at high cost, the period is long, Maintenance Difficulty for installing.
(number of patent application is for patent application that the applicant proposes from July 28th, 2015 to State Intellectual Property Office
It is 2015104524674, entitled " LED display module and pedestal disk and light-operated circuit plate used ") to disclose a kind of LED aobvious
Show mould group.
It proposes a kind of on the pedestal disk flexible of the checkerboard grid shape with a large amount of open spaces, and embedded setting can
The light-operated circuit plate of electric function is realized, to constitute independent used LED display module.Light-operated circuit plate therein is by one
Structure and one whole FPC circuit board being adapted to the pedestal disk shape is made, it is light-operated in order to avoid the grid through-hole on pedestal disk
Every width through plate and latitude plate on circuit board must make it is relatively narrow, then through on plate and latitude plate lay printed circuit,
IC chip and relevant peripheral component just seem relatively difficult.In general, using multi-layer board, such as conventional dual platen, four layers
Plate, six laminates or even eight laminates are realized, in this way, its structure is complicated and with high costs by ambassador.
In addition, since pedestal disk is the strong flexible structure of flexural resistance, correspondingly, in order to improve the light-operated circuit plate
Flexural resistance, setting can on the pedestal disk of LED lamp bead and IC chip corresponding position (hereinafter referred to as by scratch damageable zone)
The safeguard structure of impact resistance is improved, so that the LED display module is on the basis of keeping whole flexible flexible, and can be really
Damageable zone is scratched described in protecting to be protected without flexible；Or the light-operated circuit plate is the whole electricity made by Rigid Flex
Road plate, the damageable zone of being scratched are presented hard pcb board characteristic and are protected.
In production process in the future, applicants have discovered that when above-mentioned light-operated circuit plate is using integrated whole board structure
(multi-layer flexible circuit board or whole plate of either whole plate and the safeguard structure with hardboard or reinforcement liner are soft or hard combination
Plate), all there is a problem of that waste of material is big, material cost is high, complex process and reliability be not high.
Especially when the LED display module is low resolution (pixel is sparse), the face in penetrating region on light-operated circuit plate
Product is much larger than the area of actual circuit plate, even if in the relatively high score of 20mm point spacing or so (distance between two neighboring pixel)
In the case where resolution, above-mentioned light-operated circuit plate, which also has the region of nearly half, to be penetrating and needs to cut and slattern, and less discusses height
Under definition case.In the fabrication process, the penetrating region of above-mentioned circuit board is cut entirely into waste material, this causes a large amount of originals
The waste of material simultaneously pollutes environment, in this way, not only waste of raw materials be caused to also add cost.
For the LED display module of matrix form scanning, need to be equipped with the more chip being interspersed with ranks thereon, that
, it must be provided with the via hole of flood tide just on circuit boards to connect the different copper-clad circuits of multilayer circuit board, and flexible circuit
The via hole technology difficulty of plate is larger and reliability is not high, especially when the LED display module relies solely on simple outdoor suspension
When mode is installed, usually constantly distorted because of wind.In addition, when needing being dismounted for multiple times to recycle, it is frequent to distort meeting
The circuit for causing flood tide via hole to be thereon connected occurs failing or performance declines.
Secondly, many safeguard structures are arranged on pedestal disk also leading to the LED display module, structure is complicated and assembly efficiency
It is low.Although Rigid Flex can be used in some safeguard structures, its circuit-board processes is more complicated, the higher (Rigid Flex of cost
It is to press a part of flexible circuit board into hard circuit board).
Utility model content
The technical problem to be solved by the present invention is to provide a kind of saving materials, control optical circuit board at low cost, and
Cooperate the simple pedestal disk of the structure of the control optical circuit board, and makes that assembling between the two is more efficient, flexural resistance is strong, circuit
The LED display module that performance is stable and assembly efficiency is high.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model are as follows:
The LED display module of the utility model, including with several ventilation fenestras and be pedestal disk flexible and embedded
The control optical circuit board being mounted on the flexibility pedestal disk is equipped on control optical circuit board and shows mould with determinant or point control type LED
Several LED light emitting pixel points of the structure distribution setting of group and corresponding control chip, it is characterised in that: the control optical circuit
Plate is made of several pieces of in a strip shape or block-like finished product circuit board assembly, controls any one finished product circuit board in optical circuit board
It can intersect in plane to other multiple related finished product circuit boards and stacked on top of one another and by stacked connection welding electrical connection group
Dress, the finished product circuit board are respectively functional module rigid plate, functional module flexible board and letter electrical transmission flexible board, wherein
Functional module rigid plate, for installing the circuit board of the weak first kind chip of itself flexural resistance and being used for institute
State the hybrid circuit hardboard that first kind chip and LED light emitting pixel point are installed together；
Functional module flexible board, for installing the circuit board of the second strong class chip of itself flexural resistance, for installing
The pixel circuit board of LED light emitting pixel point and mixed for the second class chip and LED light emitting pixel point to be installed together
Close circuit soft board；
Believe electrical transmission flexible board, the circuit board that the access and transmission of control signals for being merely provided for electric energy are related to.
The first kind chip is the SOP cake core that pin is 16 feet or more；Second class chip is pin less than 16 feet
Perhaps pin more than 16 feet and using the chip of " J " shape lead or is QFN type, QFP type, BGA type and CSP to SOP cake core
The chip of type encapsulation.
The stacked connection welding is to be separately positioned on the functional module rigid plate, functional module flexible board and letter electricity
The position that sets has a pad of molten tin through hole in a manner of being correspondingly arranged on transmission flexible board, described stacked on top of one another and lead to
Crossing stacked connection welding electrical connection is by the functional module rigid plate, functional module flexible board and to believe in electrical transmission flexible board extremely
Few two finished product circuit boards are welded together in a manner of corresponding to pad and being stacked docking up and down.
Any one described finished product circuit board can be to intersect in plane to other multiple related finished product circuit boards
More than two finished product circuit boards intersect it is stacked after projection of shape be " ten " shape, " rich " shape, L shape, "T"-shaped, " F " shape or
" E " shape.
It is additionally provided with the wire casing for accommodating high-voltage power-line on the pedestal disk and the high voltage power supply is depressurized to control light
Circuit board real work voltage and the mounting disc of voltage-dropping power supply circuit rigid plate being arranged.
The functional module rigid plate is hard PCB circuit board, or is flexibility FPC circuit board additional protection structure structure
At；The functional module flexible board is FPC circuit board；The letter electrical transmission flexible board is FPC circuit board or electric wire.
The additional protection structure includes:
1) hard colloid is perfused on the component consolidated in flexible FPC circuit board and thereon；
2) it is glued on the component consolidated in flexible FPC circuit board and thereon and is provided with hard the cover；
3) cementing on the component consolidated in flexible FPC circuit board and thereon to be provided with hard protection piece；
4) hard protection piece is provided with the flexible FPC circuit board lower part for being consolidated with component is cementing；
5) cementing around the flexible FPC circuit board for being consolidated with component to be provided with rigid ring set.
The control optical circuit board is embedded in the pedestal disk of previously fabricated overall coherence and with soft plastic or solidifying
Glue it is cementing institute at.
The control optical circuit board package is embedded in and forms it into the protection of whole circuit board in soft plastic or gel and consolidates
Gum deposit body or insertion are wrapped in through in the protection of transparent plastic made from Shooting Technique one.
Pedestal disk and control optical circuit board in the LED display module of the utility model, structure is simpler, saves material, system
It causes this lower, and realizes high voltage supply and over long distances power supply and be convenient for being combined into the remarkable advantage of big scale of construction display screen.By
In have correspond to control optical circuit board outer dimension pedestal disk provide protection and structure-bearing, realize high buildings and large mansions exterior wall,
Building in construction are external, with hang in large-scale performance on-site tower and all if any smooth surfaces such as glass curtain walls
Building external with the Fast Installation of bonding method, repeat dismounting and the application such as recycle.
Detailed description of the invention
Fig. 1 is the schematic diagram of matrix LED display module.
Fig. 2 is point control type LED display module schematic diagram.
Fig. 3,4 are the schematic diagram of the control optical circuit board and pedestal disk in Fig. 1 respectively.
Fig. 5,6 are the schematic diagram of the control optical circuit board and pedestal disk in Fig. 2 respectively.
Fig. 7 is the perspective view of the explosion of Fig. 1.
Fig. 8 is the perspective view of the explosion of Fig. 2.
Fig. 9 a, 9b, 9c are the C-C of A-A, B-B in Fig. 4 respectively to cutaway view Amplified image.
Figure 10 a-10e is the schematic diagram of various finished product circuit boards.
Figure 11 a-11g is the structural schematic diagram of the various circuit boards that can constitute functional module rigid plate.
Figure 12 a-12c is several by pedestal disk and the injection molding of control optical circuit board or the encapsulated structural schematic diagram for forming one.
Figure 12 d is enlarged diagram at stacked connection welding.
Figure 12 e is the circuit structure enlarged diagram of Figure 12 d.
Figure 13 is the part of the connection structure between the LED display module and adjacent LED display module of the utility model
Enlarged diagram.
Figure 14 a, 14b are that matrix form row sweeps the respectively circuit of dynamic and the LED display module under static schema original respectively
Reason figure.
Figure 15 a, 15b are respectively the point control type LED display module for using a core single control and a core more to control decoding control chip
Circuit diagram.
Appended drawing reference is as follows:
Pedestal disk 1, ventilation hole 11, through slot 12, latitude slot 13, heavy disk 14, limit card slot 15, wire casing 16, corner apertures 17, substrate
18, optical circuit board 2, hard pcb board 21, FPC circuit board 22, concave indentation 23, stacked connection welding 24, molten tin through hole are controlled
241, LED light emitting pixel point 25, functional module rigid plate 3, hybrid circuit hardboard 31, functional module flexible board 4, hybrid circuit are soft
Plate 41, letter electrical transmission flexible board 5, first kind chip 6, column drive chip 61, signal transmitting and receiving coding chip 62, a core controls decoding control more
Coremaking piece 63, the second class chip 7, row drive chip 71, a core single control decoding control chip 72, hard protection piece 8, rigid cover
81, rigid cover plate 82, rigid gasket 83, hard colloid 84, rigid ring set 85, soft plastic or gel 91, power supply line 92, suspension
Rope 93, nylon roll band 94, pressure sensitive adhesive 95.
Specific embodiment
As shown in figures 1-8, the LED display module of the utility model is made of two big components, is respectively had a large amount of penetrating
Ventilation hole 11 (also referred to as ventilation fenestra) and grid-shaped pedestal disk flexible 1 and the control photoelectricity being fixed on the pedestal disk 1
Road plate 2.
One, pedestal disk 1
The pedestal disk 1 is used to protect and install the control optical circuit board 2, and holding eventually for the LED display module
Power structure is born external strengths, the components that can be used as LED display module such as distortion, installation and is made in advance,
Can control optical circuit board 2 be molded or cast after the assembly is completed colloid wrap up control optical circuit board 2 form.
It is whole to link up made of plastic cement when as ready-made component, there is flexible flexibility characteristic.Pedestal
A large amount of grids on disk 1 are that the coherent substrate enclosing intersected by several vertical and horizontal is constituted, and are had on coherent substrate for installing
The U-shaped slot of the section configuration of circuit (it is laid with the slot of finished product circuit board, longitudinal slot is known as through slot 12 below, it will be horizontal
To slot be known as latitude slot 13) and bottom surface lower than the heavy disk 14 of the groove face through slot 12 or latitude slot 13 (bottom surface of heavy disk 14 can be with
It is the disk of closure, is also possible to the disk of grid), the control optical circuit board 2 is laid in these warps, latitude slot 13 with embedded mode and sinks
In disk 14, above-mentioned section configuration it is U-shaped through slot 12 or latitude slot 13 without when being laid with finished product circuit board, can loss of weight simplify
For narrower solid substrate 18, further, in the range of guaranteeing 1 intensity of pedestal disk and tolerable deformation, the solid substrate
18 radical can be reduced suitably, the corresponding grid of each ventilation hole 11.
Appearance after each finished product circuit board in optical circuit board 2 is shelved in the U-type groove on pedestal disk 1 is controlled in order to prevent
The problem of warpage out-of-flatness, can be arranged for the various finished product circuits in control optical circuit board 2 on U-type groove two sidewalls
The limit card slot 15 (as illustrated in fig. 9) that plate limits in the height direction.Due to each finished product circuit board and coherent entirety
Pedestal disk 1 can reach certain dimensional accuracy and flexible flexible pedestal disk 1 has deformation bring size redundancy,
And under the action of limit card slot 15, each finished product circuit board can accurately be limited fixing and set on pedestal disk 1
Position, it is ensured that the relative position between each finished product circuit board is accurately without the easy changing of the relative positions.It is next step by these finished products
Change circuit board weld electrical connection assembly be configured to control optical circuit board 2 create necessary condition.
The various slots for mounting circuit boards, the size of heavy disk 14 and depth can be according to each circuit boards on pedestal disk 1
Size, thickness do integration design, even if each finished product circuit board of control optical circuit board 2, when intersecting stacked, numerous is folded
It sets connection welding 24 and is substantially at same plane (referring to shown in Figure 12 d, 12e), so that the later period welds one by one, for example shelve hard
The part of pcb board 21 is designed to that its bottom surface is lower than 13 bottom surface of longitude and latitude slot and sinks because hard pcb board ratio FPC soft board is much thick
Disk 14, it is ensured that the upper surface of hard pcb board 21 and be mounted on the following table through other finished product circuit boards in slot 12 or latitude slot 13
Face is in same plane.
On pedestal disk 1, preferably the avris position of pedestal disk 1, setting accommodate larger line footpath and penetrate through the pedestal disk 1
The wire casing 16 (as shown in figure 9b) of high-voltage power-line 92, the wire casing 16 are that control optical circuit board 2 provides electric energy to place a pair of
Positive-negative power line 92, so-called high pressure refer to that the voltage in the power supply line 92 is greater than or even is several times as much as the practical work of LED display module
Make voltage, which there must be the voltage dropping power supply feature board being arranged in LED display module could supply control photoelectricity after being depressured
Road plate 2 uses.The LED display module part is exposed at the both ends of the positive-negative power line 92 has male and female plug and adjacent LED aobvious
Show that mould group is electrically connected, to transmit electric energy.
Locating is set in the quadrangle of pedestal disk 1 and has both the hole (hereinafter referred to as corner apertures 17) of installation.
Locating refers to, during the production and assembly of the LED display module, for pedestal disk 1 to be located in correlation
So that its position is fixed and flattened on the workbench or jig of equipment, with accurate sizing to match setting for automatic machinery
Program is determined, to accurately carry out such as automatic welding, automatic injecting glue automatic operation.
Installation refers to, which is mounted on to the occasion used, and the following are two kinds of mounting means:
1) suspension installation
At the butt joint edge of two adjacent LEDs display module be arranged suspension strop 93, rolled with nylon band 94 etc. objects across pair
Two adjacent LED display modules together, are fixed on by corner apertures 17 and suspension strop 93 binding answered in a hanging manner with this
On suspension strop 93 (as shown in figure 13), the own wt for the large LED display screen being made of several LED display modules and wind lotus
The power such as load can pass to suspension strop 93, to easily realize the suspension installation of the LED display.
2) installation is pasted
It is coated with pressure sensitive adhesive 95 (as shown in Fig. 9 b, 9c) in the bottom on 1 periphery of pedestal disk, when installation, with this pressure sensitive adhesive
95 paste on smooth surface, such as are pasted on glass curtain wall, smooth exterior wall or metal plate smooth surface.Due to pedestal
The bottom on 1 periphery of disk, continuous area is larger, using sticking construction not only convenience but also because bond area is big and firm.
When LED display module is using installation is pasted, although the flexible LED display module of the flexibility is gently thin and pliable, even if
Falling from high altitude will not cause too big hardness to hit damage, but to ensure safety, can also be by the way that above-mentioned suspension strop 93 is arranged
The supplementary means for rolling the binding of band 94 with nylon improves its security reliability, (prevent adhesive failure and fall off).
Two, optical circuit board 2 is controlled
1,2 circuit form brief introduction of optical circuit board is controlled:
So-called control optical circuit board 2 refers to the control signal for being used to receive external equipment in LED display module and electric energy and controls
Each LED light emitting pixel point 25 thereon (is hereinafter also known as LED pixel point, LED pixel, pixel, one or more LED light
Pearl) luminous function circuit board.The controlled variation for realizing light and shade, gray scale, color of each LED pixel (LED lamp bead), combination show
Picture material out.Its mode controlled is divided into determinant and point control type, is described below briefly below:
1) determinant, the circuit for referring to that the circuit that each pixel of regular array is crossed by two is formed are controlled,
This two circuits to cross are referred to as row circuit and column circuits, simplest to regard a positive supply, a negative electricity as
Source, and LED lamp bead is exactly a light emitting diode, as one can imagine, when the light emitting diode is connected to the positive negative electricity of above-mentioned ranks
Source and when having electric current, which is lit, and the electric current that do not light enough then extinguishes.Further, if above-mentioned ranks electricity
Road, which can not only be connected, can also form different potential difference or current strength, which is then able to achieve the variation of light and shade gray scale.Into
One step, if the LED lamp bead can issue the light of RGB three primary colours, and above-mentioned ranks circuit can form tri- circuits RGB, then
The LED lamp bead is able to achieve color change.The various change function of above-mentioned ranks circuit is all controlled by IC chip, is referred to as gone
With the driving of column, and IC chip is controlled by external signal, receives and the IC chip for handling these signals is known as signal receipts
Decoding circuit is sent out, the IC chip in the driving circuit of above-mentioned ranks is controlled by it.Row or column designated herein simply facilitates
Sort out, and unfixed ranks divide.
The control optical circuit of determinant is divided into static drive and two kinds of turntable driving (such as Figure 14 a, 14b) again, and static drive is (such as
Shown in Figure 14 b) refer to that each pixel is independently controlled, it is commonly called as " point-to-point ", usually control column circuits, corresponding is column
IC is driven, on circuit, the output pin of one column driving IC of column electrode tip one-to-one correspondence of each pixel, and row circuit
It is rendered as a constant level；Otherwise it is row drive control if controlling row circuit, it is similar therewith.Turntable driving (such as Figure 14 a
It is shown) it is to accuse that the pulsation of rule is presented in the level height of the row circuit in optical circuit or size of current, it can simply regard as
Every a line in optical circuit is controlled by the power-up one by one of rule, i.e., in any one transient state, at least a line circuit is not powered on, and is claimed
For row scanning.And meeting multiple LED pixels in parallel on its each column column circuits, form a string of pixel strings being connected in parallel to each other, the pixel
The column electrode in parallel of string is connect with the output pin of a respective column driving IC, is commonly called as " point is to column " control, every in each column
The row electrode of a LED pixel connects corresponding different row circuit.When the conducting of the row and column of some LED pixel, the LED pixel
It shines.Unlike static drive, each LED pixel is not constant controlled luminous but pulsation, due to human eye
Suspenopsia phenomenon, under sufficiently high line-scanning frequency, people, which have no, to be discovered.The mode purpose of this turntable driving is only in fact
Be in order to realize using less driving chip and realize that control light is shown, thus the considerations of save the cost, and for
Limited space is saved in the display equipment of certain finings.
It can be seen that each LED pixel point in this control optical circuit form is to form picture element matrix, simplest row
Cloth form is exactly to arrange one by one in rows and columns.Referred to as " rank scanning formula ".
2) point control type refers to that each pixel (herein referring to one or more LED lamp beads) of regular array has power supply electricity
The control mode of its control circuit of source and connection (as shown in Figure 15 a, 15b).Each pixel has constant power supply circuit
And control circuit, and the power supply circuit is controlled by control circuit to realize the potential difference or current strength that flow through LED pixel
Difference realizes the variation of light and shade, gray scale, color.Control signal passes through minimum one group of one group of circuit output by external console
Data, all controlled devices (herein referring to LED light emitting pixel point 25) are all parallel on this group of route, pass through the address in data
Information and the address of itself set to obtain corresponding data information and control the LED pixel point of the address points.It can be seen that this
Kind control optical circuit form in each LED pixel point to formed picture element matrix, it is simplest arrangement be exactly bunchiness arrange again at
Row is arranged, and is connected to each other between pixel by control circuit and power supply circuit, forms the snakelike bending arrangement as serpentine, image
Referred to as " control of concatenation point ".
It can be seen that the control optical circuit of this point control type, each pixel have independent control circuit, also just there is an IC control
Coremaking piece, i.e. " core one control " mode (as shown in fig. 15 a)；For save the cost, people improve the integrated level of chip, occur
" core is controlled more " mode (as illustrated in fig. 15b), the i.e. multiple pixels of chip controls is that decoding is more simultaneously for the chip in fact
A address information controls corresponding LED pixel respectively, and circuit citation form is the same；It is wanted in some reliabilities
Not high occasion is sought, also there is the application by IC circuit integration into LED lamp bead, makes structure smallerization and simple.
2, the design feature of optical circuit board 2 is controlled:
The structure that above-mentioned circuit form is simply set forth to better illustrate the control optical circuit board 2 of the utility model is special
Point.
Pass through the analysis above to pedestal disk 1 and circuit form, it can be seen that control optical circuit board 2 can receive in realization
Signal and power supply, which carry out also meeting condition below while the circuit function of the control of LED pixel, to be just able to achieve the LED and shows
Showing mould group i.e. has a large amount of penetrating ventilation openings to be able to achieve deflection again without impaired functional characteristics.That is: firstly, control optical circuit
Plate 2 is the function circuit board of an entirety, secondly, a large amount of penetrating skies for having size shape to correspond to pedestal disk 1 on control optical circuit board 2
Between, finally, control optical circuit board 2 can be bent without destroying circuit.Realize at above-mentioned 3 points, way in the prior art is control photoelectricity
Road plate 2 is integral the big plate of flexible circuit of production, then the penetrating part of the stamped needs cut on integrated circuit plate,
Cropped part cannot arrange printed circuit；Further, to avoid being consolidated with chip and LED lamp bead on control optical circuit board 2
Part may be damaged by flexure, in the safeguard structure of part setting bending resistance, or using Rigid Flex production control optical circuit
Plate 2, above-mentioned part are hardboards.Although aforesaid way can produce the control optical circuit board 2 for meeting function, the big portion in circuit board
Divide to be cut and causes very big waste and a large amount of troublesome bending resistance safeguard structures need to be set；Manufacture the soft of the whole big scale of construction
Harden plywood, and cost is high.
The control optical circuit board 2 of the utility model is to the light-operated electricity in the prior art being mounted on latticed pedestal disk 1
The improvement that road plate carries out, the light-operated circuit plate of integral structure is improved to can be with the finished product circuit of separating making by several pieces
Plate is electrically connected through assembly again.
Its biggest advantage is to break the whole up into parts (i.e. by should complete circuit board turn to the circuit boards of several fritters),
It is easy to process and substantially reduce material consumption；It turns parts into the whole and (the fritter circuit board assembly of several finished products is welded into one
Whole circuit board) and the flexural resistance for controlling optical circuit board 2 can be improved.
The control optical circuit board 2 of the utility model is described in detail below.
The finished product circuit board is roughly divided into three classes by the utility model, is functional module rigid plate 3, function mould respectively
Block flexible board 4 and letter electrical transmission flexible board 5, they are substantially projection in strip rectangle or square circuit board, that is, do not have
" ten " font, L shape, " T " shaped shape.Benefit without these shapes is that each finished product circuit board during fabrication can
It arranges integral manufacture to greatest extent to utilize the circuit board raw material of rectangle, realizes cut the minimum of area during fabrication
Change, and is conducive in a row whole patch mounting related components；On the basis of meeting circuit and component is arranged, increase to maximize
The area of vent window in big LED module, should reduce the volume of wiring duct, heavy disk, keep it narrow thin as far as possible, the strip rectangle
Circuit board is also answered narrow thin, and certain circuit board outer rims are in concave-convex at this time, cuts waste for maximized reduction, should will be to realize outside
Edge has the area control of the concavo-convex portion of concave-convex lines within the 75% of circuit board real area (i other words in the finished product
The edge for changing circuit board is equipped with the concave indentation 23 that can reduce the finished product circuit board effective area to greatest extent, and the spill lacks
Mouth 23 accumulates areas and the ratios for the finished product circuit board gross areas being arranged before notch are no more than the total face of finished product circuit board
Long-pending 75%.), it is more fewer better.Also, it should be increased as far as possible for the finished product circuit board therein with flexible circuit board manufacture
The long side length of rectangular shape both can preferably utilize raw material, the flexible bending of more multistage also may be implemented, can also subtract
It is few to realize that straight line is docked and connected the stacked connection welding 24 of circuit.
1) functional module rigid plate 3 is equipped with electronic component (such as various IC chips, separation member on such circuit board
Device etc.), the electronic component of assembly thereon is protected using rigid plate, its object is to pass through the strong of rigid plate itself
Degree, enable the circuit board become in rigidity and have reliable flex stiffiness, so as to adapt to the LED display module by wind twisting and
The destruction for drawing bring deformational stress to circuit system stability, durability is pulled in repeated disassembled and assembled.Simplify the prior art simultaneously
Ad hoc and complicated safeguard structure brings the benefit of low cost as a result,.
Such circuit board is mainly used for installing the circuit board of the weak first kind chip 6 of itself flexural resistance, for installing
The circuit board of voltage-dropping power supply circuit and mixing for the first kind chip 6 to be installed together with LED light emitting pixel point 25
Circuit hardboard 31 (as shown in fig. 10d).
Since chip interior is complicated and fine integrated circuit, so it is very fragile, the pin the how then more fragile, i.e., its
Flexural resistance is weaker, and therefore, the bend resistance ability and intensity of the backboard relied on it require higher.In consideration of it, this reality
It with novel further, is divided by the pin of chip, is the by the SOP type encapsulation chip definition that number of pin is 16 feet or more
A kind of chip 6.
On chip functions, if illustrating by the embodiments of the present invention, the first kind chip 6 includes following several
Class:
The column of rank scanning formula control optical circuit drive chip 61 (as it was noted above, certain for row driving) and signal transmitting and receiving decoding
Chip 62.
2) functional module flexible board 4 is also equipped with electronic component (such as various IC chips, separation on such circuit board
Component, LED lamp bead etc.).Such circuit board is mainly used for installing the circuit board of the second strong class chip 7 of itself flexural resistance
(as shown in Figure 10 a), for installing the pixel circuit board (as shown in fig. lob) of LED light emitting pixel point 25 and for by described the
The hybrid circuit soft board 41 (as shown in figure l0c) that two class chips 7 are installed together with LED light emitting pixel point 25.
That is, for the component of some small sizes and dispersion laying, if such component itself has certain machine
The functional module flexible board 4 can also be used in tool intensity, its object is to make such circuit board largely to be bent, although its
On be equipped with component, but due to the component itself has preferable mechanical strength such circuit board be in local warp resistance without
Circuit system can be damaged, meanwhile, and safeguard structure ad hoc and complicated in the prior art can be simplified, low cost is brought as a result,
Benefit.
If dividing by chip pin quantity, number of pin can be divided into such chip less than the SOP type encapsulation chip of 16 feet
Perhaps number of pin more than 16 feet and using the chip of " J " shape lead or is QFN type, QFP type, BGA type and the encapsulation of CSP type
Mounted type chip divide such chip (such chip volume is small, flex stiffiness can be relatively strong) into.
On chip functions, if illustrating by the embodiments of the present invention, the second class chip 7 is included the following categories:
The row of row turntable driving in rank scanning formula control optical circuit drives chip 71.
The core single control decoding control chip that the LED display module of point control type drives single led light emitting pixel point 25 to work
72。
3) electrical transmission flexible board 5 is believed, for being only that above-mentioned functional module rigid plate 3 and functional module flexible board 4 provide
The circuit board of electric energy and transmission of control signals is just using 5 (such as Figure 10 e of the letter electrical transmission flexible board made by FPC circuit board 22
It is shown).In general, such circuit board occupies the major part of LED display module, therefore, the LED can be made aobvious using FPC circuit board 22
Show that mould group is bent without damaging circuit system to a greater extent.
Any one finished product circuit board can be to other multiple relevant finished product circuit boards at one in above-mentioned three classes plate
It intersects in plane, their projection is in " ten " shape, " rich " shape, L shape, "T"-shaped, " F " shape, " E " shape etc., in infall shape
At overlay area, it is provided on the upper and lower circuit plate of overlay area by mutual corresponding stacked company needed for circuit function connection
Solder joint is connect, these are stacked connection welding correspondence in a manner of soldering and is electrically connected and consolidates upper and lower circuit plate.Finished productization electricity herein
Road plate is cross-superimposed affixed different from (the pressing manufacture of copper foil, filled layer, cover film etc. of traditional multilayer circuit board
Board structure of circuit) connection, but by multiple finished product circuit boards in above-mentioned three classes plate by be cross-woven assembly superposition and
Welding forms the control optical circuit board 2 for the LED display module that whole of electrical connection composition has whole electric functions.
Above-mentioned functional module rigid plate 3, functional module flexible board 4 and letter 5 three classes circuit board of electrical transmission flexible board, should use up
Amount is manufactured using flexible circuit board (FPC), and is designed to the circuit board form of the strip of bulk as far as possible, preferably to save
Raw material mitigate weight, avoid the occurrence of numerous fritter finished circuits and increase cumbersome stacked connection welding 24, such as can be at
Row or circuit arranged in rows, although the region in need using hard pcb board 21 (as shown in fig. 11a) manufacture in circuit,
Its portion in entire circuit is little, at this point, using hard pcb board 21 to manufacture the part with it, then again by itself and its
Its flexible circuit board forms linear connection in the form being electrically connected, and just manufactures not as good as with FPC circuit board 22 is whole, then with attached
The safeguard structure added is configured to functional module rigid region, because increasing safeguard structure ratio at this time is connected electrically in manufacture assembly
When it is more efficient, such as " concatenation point control " formula bunchiness arrangement multiple serpentine sequential circuits part, each pixel circuit part
Left and right or (can horizontal serpentine concatenation, can also vertical serpentine concatenation) at least two groups totally 6 docking solder joints respectively up and down
24, it needs between pixel to be connected with each other with flexible board or RV electric wire, manufactures the pixel-matrix of bunchiness with whole FPC plate at this time
Strake can save largely stacked connection welding 24, and additional protection structure is arranged in each pixel circuit region to protect
Shield is then more efficient, and the additional protection structure has several lower several types:
A: the circuit region that need to be protected by way of being placed in rigid cover 81 (as illustrated in fig. 11e), i.e., in flexible electrical
The box-packed body set that Open Side Down of part merging one of the need protection for being consolidated with LED lamp bead or chip or other components on the plate of road
On the portion, the final box-packed body the cover 81, circuit board, pedestal disk 1 are bonded integrally lid by colloid, to form one just
Property region, enables circuit part to be protected.There is LED light for protected portion point, which can be with hard straight saturating
Bright plastics are made (as shown in Figure 11 g), and another benefit of this kind of safeguard structure is to completely cut off external environment completely, greatly improve
The weatherability of foregoing circuit part, such as LED lamp bead region in pixel circuit board, point control type while include LED lamp bead
With the region of control chip, voltage dropping power supply plate etc.；
B: the circuit region that need to be protected by way of being placed in rigid cover plate 82 (as shown in fig. 11c), i.e., in flexible electrical
The one hard piece of top merging of the part of the need protection for being consolidated with chip or other components on the plate of road, the final hard piece,
Circuit board, pedestal disk 1 are bonded integrally by colloid, to form a rigid region, so that circuit part is protected, this kind of side
Formula is particularly suitable for some multi-chips and the consistent region of component overhead height, such as column drive circuit part, signal transmitting and receiving
Main control chip region is decoded, which can print trade mark etc. information, also act as shielding electricity according to sheet metal
The effect of magnetic disturbance and heat dissipation simultaneously greatly improves the weatherability of circuit；
C: the circuit region that need to be protected by way of being placed in rigid gasket 83 (as shown in Figure 11 b, Figure 11 f), that is, exist
The lower part of the part of the need protection for being consolidated with LED lamp bead or chip or other components on flexible circuit board is placed in a hard
Piece, the final hard piece, circuit board, pedestal disk 1 are bonded integrally by colloid, to form a rigid region, make circuit part
It is able to be protected, such mode directly protects flexible circuit board, is particularly suitable for that frequent repeated disassembled and assembled recycling mode is needed to make
LED module has the function of stronger raising structural rigidity；
D: (such as Figure 11 e, Figure 11 f, schemed by way of being in hard colloid 84 after pouring into condensation in the circuit region that need to be protected
Shown in 11g), i.e., the part of the need protection for being consolidated with LED lamp bead or chip or other components on flexible circuit board is independent
It is in the colloid of hard after injection condensation, the final hard colloid 84, circuit board, pedestal disk 1 are integral by colloid bonding, thus shape
At a rigid region, circuit part is enable to be protected, automated production may be implemented in such mode, but need to consider above-mentioned hard
Colloid and pedestal disk 1 on the physical and chemical compatibility of the soft colloid that is injected of other regions, weatherability etc. matching, when necessary
It needs to separate 84 part of hard colloid and external soft glue body portion with ring set 85；
E: the circuit region that need to be protected by way of being embedded in rigid ring set 85 (as illustrated in fig. 11d), i.e., in flexible electrical
The rigid ring set 85 of periphery insertion one of the part of the need protection for being consolidated with LED lamp bead or chip or other components on the plate of road,
So-called ring set 85 is both the structural member of a upper and lower opening with certain wall high circular ring type or rectangle, the final rigidity ring set
85, circuit board, pedestal disk 1 are bonded integral by colloid, to form a rigid region, circuit part are enable to be protected, should
The characteristics of kind of mode be it is simple, more at low cost than 81 mode structure of rigid cover, installation operation is easy.
The additional protection structure of the above diversified forms, respectively there is advantage and disadvantage, depending on the use environment and weatherability of LED display module
Depending on it is required that, its object is to as far as possible will be each in this control optical circuit board 2 assembled with the stacked electric connection mode of intersection
Kind functional circuitry plate is unified into regular integrated in a row or big part circuit board in column, reduces between a large amount of plate and plate
Docking solder joint 24, improve the consolidation installation effectiveness of component, realize and cutting waste again during reducing circuit board fabrication
Reduce 24 operational sequence of solder joint in later period assembling.It is significant to note that certain IC chip circuit regions, according to common
Double-sided PCB manufactured and will cause serious circuit electromagnetic induction noise disturbance, because of the thickness of flexible double-sided circuit board
Too small, usually only about 0.2mm is thick, at this time up and down between printed circuit because apart from it is too small due to seriously interfere with each other circuit caused to lose
Effect, some especially current chips are using the signal for being up to 25 megahertzs.Multi-layer board should be used at this time, in upper and lower printed circuit
Contain shielded layer (usually at least one layer of copper foil).
3, the assembly of optical circuit board 2 is controlled:
The control optical circuit board 2 of the utility model uses the whole finished product circuit board of several slip gauges, above-mentioned various finished products
After circuit board is carried out, is assembled and be electrically connected there are two types of method: being installed to ready-made base first is that they are superimposed one by one
It is corresponding through in slot 12, latitude slot 13 or heavy disk 14 on 1 component of frame disk, by pedestal disk 1 through slot 12, latitude slot 13 and heavy disk 14
Positioning in plane and limit card slot 15 are given to their positioning and flattening in the height direction to them.
Being electrically connected to each other between the upper and lower is formed after above-mentioned various finished product circuit board assemblies superposition.Designing these electricity
When the plate of road, setting pad is respectively corresponded to the part for needing to weld electrical connection up and down, the pad above and below these being capable of accurate contraposition.
To obtain more reliable electrical connection and better bonding strength, molten tin perforation is provided in the upper pad of upper and lower interlayer electrical connection point
Hole, scolding tin when welding in upper pad are sufficiently fused together with the scolding tin in lower pad.These are corresponding in stacked connection welding
The pad of setting is to bring the size redundancy of contraposition, for example pad is all up and down there are one effectPad, then
It is just brought and is less than with scolding tin weldering connection typeIt is huge can join domain, this just give between each finished product circuit board and
They are laid in above pedestal disk and bring extremely large size redundancy, substantially reduce the size to each finished product circuit board, pedestal disk
Required precision substantially reduces the cost of due to needing high-precision to manufacture bring mold, technique.
If upper layer circuit board is dual platen, corresponding docking pad is only set below the circuit board, electricity is passed through
The electric energy of following pad is imported top panel and also may be used by conventional via hole in the plate of road.This method reliability is less high, and when electric current compared with
The problem of conference capacity is inadequate and forms layer capacitance high frequency channel.
Due on pedestal disk 1 circuit board slot bottom surface and 14 bottom surface of heavy disk have the different height being accordingly arranged, be mounted on it
In the bottom surface of very thin flexible circuit board and the upper surface of much relatively thick hard pcb board 21 be substantially at same plane
Highly, to make to be electrically connected pad up and down to greatest extent close to electrical connection welding more convenient operation high efficient and reliable is particularly suitable for
Automation equipment, the corner apertures 17 for also having benefited from pedestal disk 1 provide flattening and positioning.
The another way for controlling assembly and the electrical connection of optical circuit board 2 is that the model of pedestal disk 1 is similar to using one
Jig, with its come carry out to various finished product circuit boards one by one be superimposed when plane positioning and short transverse limit flattening and
Positioning.Then it keeps up with that a kind of mode is similar, they is electrically connected so that the whole control optical circuit for having complete function is made
Plate 2.This mode be suitable for it is above-mentioned control optical circuit board 2 after the assembly is completed be molded or cast wrap up control optical circuit board 2 form
LED display module.
The circuit board of strip and block finished product is used to intersect and control optical circuit stacked on top of one another and being electrically connected assembling in plane
The benefit of plate: the raw material for being that of avoiding during a large amount of circuit board fabrication cut waste；Second is that the form of piecemeal assembly
Compared to the pedestal disk that the whole latticed circuit board with the big scale of construction removes adapted mesh shape, bring to circuit board and pedestal disk
Dimension precision requirement substantially reduces, and greatly reduces the requirement and cost of mold, manufacturing process；Third is that bringing to control photoelectricity
Road plate carries out the benefit of piecemeal maintenance replacement, avoids that the monolithic devices circuit board line inspection is complicated, damage may all scrap at one
Drawback；Fourth is that the circuit board of the function modoularization of a variety of finished products greatly reduces numerous small and scattered ad hoc and complicated protection
Structure greatly improves the manufacture efficiency of mould group, reduces mould group cost；Fifth is that the juxtaposition part of circuit board is also brought
Improve the benefits such as flex stiffiness energy, mutual heat loss through conduction, electromagnetic shielding；Sixth is that the docking pad up and down in circuit board, not only
The effect that circuit is vertically connected with is brought, the effect for also bringing size fit, reducing dimensional fits required precision greatly improves
Fit size allowable deviation between circuit board, between circuit board and pedestal disk！
Three, the assembly of LED display module
Because of the difference of 1 structure type of pedestal disk, LED display module is equipped with two ways.
It is ready-made overall structure component one is pedestal disk 1, control optical circuit board 2, which is assembled on it and is electrically connected, to be connected into
The whole control optical circuit board 2 for having complete function (as shown in Figure 12 a-12c).The latter procedure of such mode is by liquid
Colloid pours into the circuit slot on pedestal disk 1, heavy disk 14, in power supply wire casing 16, constitutes after colloid condensation and have flexible flexibility characteristic
Soft plastic or gel 91 (except the region using ebonite safeguard structure), above-mentioned encapsulating not only promising circuit structure provide it is anti-
Water, dust-proof effect, there are also the effects of all circuit structures on final consolidation pedestal disk 1, also consolidate various additional protection knots
The effect of structure, achieves many things at one stroke.
Another way is exactly control optical circuit board 2 to be made in advance, then will control optical circuit board 2 with injection molding or colloid casting package
Mode constitute the LED display module with 91 housing of the soft plastic or gel (as shown in Figure 12 a-12c).Such side
The benefit of formula be without higher 1 component of pedestal disk of the accuracy of manufacture, especially suitable for certain pairs of modular structure intensity requirements not
The well occasion without twisting (being such as pasted on firm smooth surface) can be provided after high use environment (such as wind disturbance is small), installation
And the usage mode without repeated disassembled and assembled recycling.The cross sectional shape of the pedestal disk 1 of these forms manufacture is (complete in O shape
Package) or it is inverted U-shaped (only being wrapped up in the form of the extremely letter of plastic cement or colloid in control 2 front of optical circuit board).
Claims (9)
1. a kind of LED display module, including with several ventilation fenestras and for pedestal disk (1) flexible and installation by adhering at this
Control optical circuit board (2) on flexible pedestal disk (1) is equipped in control optical circuit board (2) and shows mould with determinant or point control type LED
Several LED light emitting pixel points (25) of the structure distribution setting of group and corresponding control chip, it is characterised in that: the control light
Circuit board (2) is made of several pieces of in a strip shape or block-like finished product circuit board assembly, control optical circuit board (2) in any one at
Product circuit board can intersect in plane and stacked on top of one another and welded by being stacked to connect to other multiple related finished product circuit boards
Point (24) electrical connection assembling, the finished product circuit board be respectively functional module rigid plate (3), functional module flexible board (4) and
Believe electrical transmission flexible board (5), wherein
Functional module rigid plate (3), for installing the circuit board of the weak first kind chip (6) of itself flexural resistance and for inciting somebody to action
The hybrid circuit hardboard (31) that the first kind chip (6) and LED light emitting pixel point (25) are installed together；
Functional module flexible board (4), for installing the circuit board of the second strong class chip (7) of itself flexural resistance, for pacifying
Fill the pixel circuit board of LED light emitting pixel point (25) and for pacifying the second class chip (7) and LED light emitting pixel point (25)
The hybrid circuit soft board (41) being fitted together；
Believe electrical transmission flexible board (5), the circuit board that the access and transmission of control signals for being merely provided for electric energy are related to.
2. LED display module according to claim 1, it is characterised in that: the first kind chip (6) is that pin is 16 feet
Above SOP cake core；Second class chip (7) is SOP cake core or pin of the pin less than 16 feet more than 16 feet and use
The chip of " J " shape lead, or the chip for the encapsulation of QFN type, QFP type, BGA type and CSP type.
3. LED display module according to claim 2, it is characterised in that: the stacked connection welding (24) is difference
The position set on the functional module rigid plate (3), functional module flexible board (4) and letter electrical transmission flexible board (5) is set
There is the pad of molten tin through hole (241) in a manner of being correspondingly arranged, it is described stacked on top of one another and pass through stacked connection welding electricity
Connection is will be at least two in the functional module rigid plate (3), functional module flexible board (4) and letter electrical transmission flexible board (5)
Finished product circuit board is welded together in a manner of corresponding to pad and being stacked docking up and down.
4. LED display module according to claim 2, it is characterised in that: any one described finished product circuit board can
It to intersect in plane is that more than two finished product circuit boards intersect the throwing after being stacked to other multiple related finished product circuit boards
Shadow shape is " ten " shape, " rich " shape, L shape, "T"-shaped, " F " shape or " E " shape.
5. LED display module according to claim 1, it is characterised in that: be additionally provided on the pedestal disk (1) for holding
Receive high-voltage power-line (92) wire casing (16) and by the high voltage power supply be depressurized to control optical circuit board (2) real work voltage and be arranged
Voltage-dropping power supply circuit rigid plate mounting disc.
6. LED display module according to claim 1, it is characterised in that: the functional module rigid plate (3) is hard
PCB circuit board, or constituted for flexibility FPC circuit board (22) additional protection structure；The functional module flexible board (4) is FPC
Circuit board (22)；The letter electrical transmission flexible board (5) is FPC circuit board (22) or electric wire.
7. LED display module according to claim 6, it is characterised in that: the additional protection structure includes:
Hard colloid (84) are perfused on the component consolidated in flexible FPC circuit board (22) and thereon；
It is glued on the component consolidated in flexible FPC circuit board (22) and thereon and is provided with hard the cover (81)；
It is cementing on the component consolidated in flexible FPC circuit board (22) and thereon to be provided with hard protection piece (8)；
Hard protection piece (8) are provided with flexible FPC circuit board (22) lower part for being consolidated with component is cementing；
It is cementing around the flexible FPC circuit board (22) for being consolidated with component to be provided with rigid ring set (85).
8. LED display module according to claim 7, it is characterised in that: be embedded in the control optical circuit board (2) pre-
In the pedestal disk (1) of the overall coherence first manufactured and with soft plastic or gel (91) it is cementing institute at.
9. LED display module according to claim 7, it is characterised in that: the control optical circuit board (2) package to be embedded in
The protection consolidation colloid or insertion that whole circuit board is formed it into soft plastic or gel (91) are wrapped in through Shooting Technique
In the protection of transparent plastic made from one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820940606.7U CN208442794U (en) | 2018-06-19 | 2018-06-19 | LED display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820940606.7U CN208442794U (en) | 2018-06-19 | 2018-06-19 | LED display module |
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| CN208442794U true CN208442794U (en) | 2019-01-29 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709171A (en) * | 2018-06-19 | 2018-10-26 | 深圳市熠鸿光电科技有限公司 | LED display modules |
| CN117308051A (en) * | 2023-09-27 | 2023-12-29 | 东莞市福凯半导体技术有限公司 | Lighting lamp with movable light source module |
-
2018
- 2018-06-19 CN CN201820940606.7U patent/CN208442794U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108709171A (en) * | 2018-06-19 | 2018-10-26 | 深圳市熠鸿光电科技有限公司 | LED display modules |
| CN117308051A (en) * | 2023-09-27 | 2023-12-29 | 东莞市福凯半导体技术有限公司 | Lighting lamp with movable light source module |
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