CN209708111U - A kind of ultrathin flexible touching display screen - Google Patents
A kind of ultrathin flexible touching display screen Download PDFInfo
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- CN209708111U CN209708111U CN201920292792.2U CN201920292792U CN209708111U CN 209708111 U CN209708111 U CN 209708111U CN 201920292792 U CN201920292792 U CN 201920292792U CN 209708111 U CN209708111 U CN 209708111U
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Abstract
The utility model discloses a kind of ultrathin flexible touching display screen, including OLED display layer, is followed successively by adhesive layer and capacitance touching control layer on the OLED display layer；The capacitance touching control layer is disposed with the second conductive layer close to the side of OLED display layer, reinforces insulation support layer, the first conductive layer, hardening basal layer, and first conductive layer and the second conductive layer are the flush type metal mesh structure in transparent polymeric layer；The transparent polymeric layer imprints glue using high molecular material resistant to bending, and the flush type metal mesh structure is solidified by high-toughness hot curable type electrocondution slurry；The reinforcement insulation support layer is the UV glue-line being separately provided.Ultrathin flexible touching display screen structure optimization in the utility model, cost is relatively low, stay in grade, and application scenarios are extensive.
Description
Technical field
The utility model relates to flexible screen technical field, especially a kind of ultrathin flexible touching display screen technical field.
Background technique
OLED display technology has self luminous characteristic, the very thin coating of organic material of use and glass substrate production,
When electric current passes through, these organic materials will shine, and OLED display screen visible angle is big, and can save electric energy,
Therefore very widely used.
Since in September, 2017, Apple Inc. has used oled panel on its iPhone X product for the first time, has made oled panel
It is increasingly becoming the mainstream of middle and high end smart machine, and with the continuous development of OLED technology, the successive volume production of Duo Jia OLED manufacturer
Flexible OLED screen curtain.For OLED manufacturer, how flexible touch technology is realized on flexible screen, it will be new technology
Problem.
Future electronic equipment gradually develops to curved design, flexible screen design direction, but leads using the prior art is transparent
Electrolemma is bonded to each other and manufactured touch module is often not suitable for often bending.Prior art production conductive film usually exists as follows
Technical problem, production process are complicated, and can not stability contorting product quality, yield is lower, and especially current capacitance plate is basic
The technique being bonded to each other using two panels transparent conductive film, product thickness are restricted, and do not meet existing touch screen to ultralight, super
The trend of thin development, and it is at high cost.Requirement along with touch display screen to bending is higher and higher, and traditional external hanging type touches
Screen structure design is no longer satisfied the market demand, and requirement of the flexible screen for structural thickness is higher than ordinary screen, because
This, it is also very necessary for developing the flexible touch display screen that a kind of thickness is thin, bending resistance is good.
Utility model content
The utility model aim is to overcome the shortcomings of the prior art, solves problems of the prior art, this reality
With a structure optimization of novel offer, cost is relatively low, the ultrathin flexible touching display screen of stay in grade, and application scenarios are extensive.
In order to solve the above technical problems, the utility model provides following technical solution: a kind of ultrathin flexible touch-control is shown
Screen, including OLED display layer:
Adhesive layer and capacitance touching control layer are followed successively by the OLED display layer；
The capacitance touching control layer is disposed with the second conductive layer close to the side of OLED display layer, reinforces insulating supporting
Layer, the first conductive layer, hardening basal layer, first conductive layer and the second conductive layer are the flush type in transparent polymeric layer
Metal mesh structure；
The transparent polymeric layer imprints glue using high molecular material resistant to bending, and the flush type metal mesh structure is by height
Toughness heat curing type electrocondution slurry solidifies；
The reinforcement insulation support layer is the UV glue-line being separately provided.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The capacitance touching control layer includes transparent base layer, and the transparent base layer side is disposed with the first conduction
Layer reinforces insulation support layer, the second conductive layer, and the transparent base layer is hardening basal layer after hardening treatment；
The capacitance touching control layer passes through adhesive layer with OLED display layer far from the one side of hardening basal layer with the second conductive layer
It is combined, the hardening basal layer of the capacitance touching control layer is as outer layer.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The adhesive layer is OCA optical cement；The hardening basal layer uses polyethylene terephtalate or polyamides
Imines PI or optical material COP.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The hardening basal layer is hardened to obtain by transparent substrates, is provided with the first UV glue-line on the hardening basal layer,
It is provided with that reinforce insulation support layer be the 2nd UV glue-line on the first UV glue-line, the is provided on the 2nd UV glue-line
Three UV glue-lines, the 3rd UV glue-line are bonded with OLED display layer；
The first UV glue-line is the first layer UV solidification glue being coated in transparent substrates layer surface, the first UV glue-line into
Row pattern imprint is simultaneously solidified to form the latticed groove of the first conductive layer and the lead groove in first lead area, and described first
The latticed groove of conductive layer and the lead groove in first lead area are filled with conductive material, first conductive layer it is latticed
Thickness of the depth of groove and the lead groove in first lead area less than the first UV glue-line；
The first UV film surface is provided with the 2nd UV glue-line, and the 2nd UV glue-line is as reinforcement insulation support layer；
The 2nd UV film surface is provided with the 3rd UV glue-line, and the 3rd UV film surface is patterned coining simultaneously
Solidification, formed the second conductive layer latticed groove and the second lead district lead groove, second conductive layer it is latticed
Groove and the lead groove of the second lead district are filled with conductive material, the latticed groove and the second lead of second conductive layer
The depth of the lead groove in area is not more than the thickness of the 3rd UV glue-line.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen: the first UV of the touch control conductive film
Glue-line, which is patterned, imprints and is solidified to form the latticed groove of the first conductive layer, the lead groove in first lead area and the
The aligning graph groove of a pair of of bit identification, the latticed groove of first conductive layer, the lead groove in first lead area and
The aligning graph groove of a pair of of bit identification is filled with conductive material, the latticed groove of first conductive layer, first lead
Thickness of the equal depth of the aligning graph groove that the lead groove in area and the first contraposition identify less than the first UV glue-line；
The 3rd UV film surface is patterned coining and solidifies, formed the second conductive layer latticed groove, the
The aligning graph groove of the lead groove of two lead district and the second contraposition mark, the latticed groove of second conductive layer, the
The lead groove of two lead district and the aligning graph groove of the second contraposition mark are filled with conductive material, second conductive layer
Latticed groove, the second lead district lead groove and second contraposition mark aligning graph groove depth be not more than third
The thickness of UV glue-line；
The figure of the first contraposition mark and the second contraposition mark in transparent conductive film product or is retained, or by
It cuts.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen: the 2nd UV glue-line with a thickness of
1~10 micron.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The 2nd UV glue-line is different from the material of the 3rd UV glue-line, the first UV glue-line and the 3rd UV glue line material phase
It is same or different.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The electrical connection area in the first lead area, which is not coated with, is furnished with second layer UV solidification glue, and the second of the 3rd UV glue-line is drawn
The electrical connection area in line area is not overlapped with the area that is electrically connected in the first lead area of the first UV glue-line.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
Adhesion promoting layer is coated between the transparent substrates and the first UV glue-line or does tackified finish；
And/or adhesion promoting layer is coated between the first UV glue-line and the 2nd UV glue-line or does tackified finish；
And/or adhesion promoting layer is coated between the 2nd UV glue-line and the 3rd UV glue-line or does tackified finish.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The 2nd UV glue-line is the composite layer formed in the multiple coating UV solidification glue of the first UV film surface, described first
The electrical connection area surface of lead district does not cover the 2nd UV glue-line.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The lead of the latticed groove and first lead area and the second lead district of first conductive layer and the second conductive layer
Groove is filled with nanometer silver paste or nano copper slurry or grapheme material or silver nanowire or carbon nano-tube material.
A kind of preferred embodiment as the utility model ultrathin flexible touching display screen:
The upper surface of the 3rd UV glue-line is arranged matcoveredn, and the protective layer is polymeric layer, the first UV glue-line, the
Two UV glue-lines, the 3rd UV glue-line, protective layer and transparent substrates are formed together composite transparent conductive film, and the of the 3rd UV glue-line
The electrical connection area of two lead district is not overlapped with the area that is electrically connected in the first lead area of the first UV glue-line.
The display research of applicant long campaigns flexibility touch-control, once utilizes nanometer embossing on a transparent substrate
Suppress the groove for burying conducting metal particles and the grid for light transmission, by design groove line width and depth with
And the specific gravity of entire transparent conductive film is accounted for, obtain that a kind of light transmittance is high and the transparent conductive film of good conductivity.Based on before
Technological accumulation before inventor obtains the art of this patent scheme, attempted kinds of schemes, but all effect is bad.Inventor grinds
One of originating party case is exactly that the structure of bilayer or multilayer patterned transparent conductive film is arranged directly on a surface at one of transparent substrates,
Although the technical solution theoretically see it is relatively good, as long as control upper layer substratum transparent thickness be greater than upper layer conductive layer depth
It spends, energy mutual insulating still in fact, inventor has carried out a large amount of experiment, finds this kind of technology between two conductive layers
Scheme yield is too low, the feasibility without scale volume production, refers to the experimental data and analysis of specific embodiment part.
The art of this patent scheme is just obtained after repeatedly improving and continuously attempting to, and is at least had using the technical solution of this patent
There are following advantageous effects:
1, the reinforcement insulation support layer isolation that the creative utilization of this patent ultrathin flexible touching display screen is separately provided the
One conductive layer and the second conductive layer, the second conductive layer are arranged in the 3rd UV glue-line, and the 3rd UV glue-line is arranged embossed
Or be coated with and have been cured the 2nd UV glue-line (as reinforce insulation support layer) on, can increase substantially the first conductive layer with
Insulation effect between second conductive layer effectively prevent the short circuit problem of conductive layer.
According to research and development reference example described in the utility model Fig. 2, the double-deck patterned transparent is directly set on a transparent substrate
The structure of conductive film, it is found that yield is very low, and there are a large amount of conductive layer short circuit problems, the reason of causing the problem may be high
Caused by the various factors such as the defect that temperature processing is cracked, solvent volatilizees, is formed in polymer.Its profound reason is this patent
The processing of high molecular material processing that product and technique are related to is a technology interdisciplinary, and the working process of high molecular material relates to
And the intersection to multiple subjects such as polymer chemistry, chemical engineering, Polymer Physics, Engineering Thermophysics, process control.Macromolecule
The properties of material are usually closely related with its chemical structure, and chemical structure but be that can be added by high molecular material
Work technique is driven, so many seem the processing technology of subtle change but often to the output quality control of high molecular material
It is formed with unexpected change.
The 2nd UV glue-line that this patent is separately provided can effectively solve the problem that foregoing problems, produce preferable technical effect.
For example, being directly arranged second in research and development reference example described in the utility model Fig. 2 on the first conductive layer of the first UV glue-line and leading
Electric layer, then since the various factors in processing of high molecular material causes running through for conductive material to be permeated, thus be easy to cause short circuit,
Yield is too low, can not practical volume production.
Insulation support layer is individually reinforced in this patent setting, play the role of it is certain smooth, then the 2nd UV after hardening
The 3rd UV glue-line is imprinted on glue-line, in the 3rd UV film surface pattern imprint and fills conductive material the second conductive layer of production
When, it is had been cured since other than be isolated and have the 3rd UV glue-line, also isolation has between the first conductive layer and the second conductive layer
2nd UV glue-line, therefore the problem of layer short circuit of two conductive layers, is difficult to occur, to greatly improve the yield of product.
And it can learn that setting individually reinforces insulation support layer than individually improving the 3rd UV glue-line according to experimental data
The technical effect of thickness wants significant effective.
Meanwhile the technical solution of this patent can also control the constant or thinner premise of the original thickness of conductive film product
Under, the first UV glue-line is suitably done with the 3rd UV glue-line thin, the 2nd UV glue-line for reserving thickness space to be separately provided carries out exhausted
Edge isolation, electronic product entire in this way are just thinner.
2, increased reinforcement insulation support layer in this patent simultaneously should in addition on the one hand playing the role of reinforcing insulation
Layer structure and upper layer and lower layer conductive layer form lamination layer structure, increase conductive film performance resistant to bending, further improve production
The application scenarios of product have also been enlarged in the stability of product, are suitble to the demand of the multi-point touch such as flexible screen.
Detailed description of the invention
The utility model is further described with reference to the accompanying drawings and embodiments:
Fig. 1 is the schematic perspective view of the capacitance touching control layer of the utility model ultrathin flexible touching display screen；
Fig. 2 is the structural schematic diagram for the capacitance touching control layer that inventor researches and develops reference example；
Fig. 3 is the schematic diagram of the section structure of the capacitance touching control layer of ultrathin flexible touching display screen；
Fig. 4 is the schematic diagram of another capacitance touching control layer of ultrathin flexible touching display screen；
Fig. 5 is the curve graph of the thickness of the 2nd UV glue-line and yield in the utility model；
Fig. 6 is not set 2nd UV glue-line, only adjusts the thickness of the 3rd UV glue-line and the curve graph of yield；
Fig. 7 shows the electrical connection area of the first conductive layer lead district and the signal for being electrically connected area of the second conductive layer lead district
Figure；
Fig. 8 is the schematic diagram of ultrathin flexible touching display screen one embodiment；
Fig. 9 is the schematic diagram of another embodiment of ultrathin flexible touching display screen.
Specific embodiment
Technical solutions of the utility model are described in detail in 1-9 and embodiment with reference to the accompanying drawing, in which: 1, transparent
Substrate (basal layer)；2, the first UV glue-line；3, the first conductive layer；4, the 2nd UV glue-line (reinforce insulation support layer or insulating layer or
Insulation support layer)；5, the 3rd UV glue-line；6 second conductive layers；Protective layer (is not shown in the figure, its wearability, anti-gold can be enhanced
Belong to oxidation or vulcanization etc.)；7, the electrical connection area in first lead area；8, the electrical connection area of the second lead district；Oled layer；Adhesive layer；
Harden protective layer, hardening basal layer.
The terms such as the first UV glue-line, the 2nd UV glue-line, the 3rd UV glue-line described in this patent be for distinguishing each layer of structure,
Not indicate that this layer of structure only has UV glue, such as it includes wherein conductive that the first and third UV glue-line is according to the description of its structure and attached drawing
Structure.
As shown in Figure 1, present embodiment discloses a kind of capacitance touching control layer of ultrathin flexible touching display screen, including transparent base
Bottom 1 is provided with the first UV glue-line 2 in the transparent substrates 1, and first conductive layer 3 is by pattern imprint in the first UV glue-line 2
On a plurality of grid grooves in conductive material constitute；3rd UV glue-line is set on the transparent reinforcement insulation support layer 4
5, second conductive layer 6 is made of pattern imprint in the conductive material in a plurality of grid grooves on the 3rd UV glue-line 5.
It should be noted that including the 3rd UV glue-line setting cured 2nd UV glue-line after imprinting of the second conductive layer
On (reinforcing insulation support layer), the dynamics that insulate between the first conductive layer and the second conductive layer can be increased substantially, conduction is avoided
Layer runs through this problem, as shown in figure 3, the 3rd UV glue-line is imprinted on transparent reinforcement insulation support layer after hardening, solidification
It is filled after 3rd UV glue-line after conductive material makes the second conductive layer, the problem of layer short circuit is difficult to occur, to greatly improve
The yield of product.
Transparent substrates are the common polymeric layer of conductive film.It should be noted that the first UV glue-line, the 3rd UV glue-line and
The material of two UV glue-lines (reinforcing insulation support layer) can be UV solidification glue, thermohardening lacquer, preferably UV solidification glue.First UV glue
Layer is smooth as far as possible with the solidification rear surface of the 3rd UV glue-line, such as coefficient of friction is between 0.1~0.4, convenient for by scratching
Mode fills conductive material.The curable adhesive layer rear surface of 2nd UV glue-line, i.e. reinforcement insulation support layer has certain roughness,
It is preferred that coefficient of friction between 0.4~1.0, make reinforce insulation support layer have enough adhesive force, increase the first UV glue-line with
The degree of adhesion of 3rd UV glue-line.
It can be according to routine techniques for each layer, for example, transparent substrates, the first UV glue-line, the 2nd UV glue-line and the 3rd UV
Tackified finish is carried out between glue-line, or is coated with tackifier coating.This conventional treatment of adhesion promoting layer itself can not play reinforcement insulation
And the effect of support.If the first UV glue-line, the 3rd UV glue-line and the 2nd UV glue-line (reinforcing insulation support layer) all use phase
With UV solidification glue, then tackified finish or setting adhesion promoting layer can be taken, more preferably to combine.Conventional use of adhesion promoting layer it is main
Material can be polyacetylene, polyaniline, polythiophene, graphene, polyethylene terephthalate, polyurethane etc., generally use
The mode of coating is coated in the surface of substrate to achieve the effect that bond with superstructure, and the thickness range of coating is 10~
100nm。
Other than transparent substrate material is according to the materials such as different application scene and demand selection PET, PI polyimides, it is
Reinforce insulation between conductive layer, reinforcing insulation support layer its preferred thickness is 5~10 microns, the solidified forming after coining,
Surface is relatively flat, is not in the different situation of thickness.
This patent due to reinforce insulation support layer insulation and support effect, make the yield of product can achieve 90% with
On, referring specifically to Fig. 2, Fig. 3, Fig. 5, Fig. 6, and following table explanation.
It is as follows to carry out environmental test, test condition: 85 DEG C of temperature, humidity 85%RH, the time 240 hours, be powered test.It surveys
Method for testing and key step: 1. extract test sample；2. examining appearance before test, function is confirmed whether qualification；3. investment test
Test condition: case 85 DEG C of temperature, humidity 85%RH, the time 240 hours, is powered；4. after reaching test condition, taking out product；5.
After static 24 hours of product, appearance is examined, carries out functional test；6. test terminates, data such as following table is recorded.
The factor of before-mentioned products production yield, predominantly product structure are influenced, no product for reinforcing insulation support layer exists
Upper lower wire short circuit phenomenon, and have reinforcement insulation support layer (this programme) without this bad phenomenon.
For without the structure for reinforcing insulation support layer, i.e., the double-deck patterned transparent conductive film being directly arranged on a transparent substrate
Structure, be illustrated in figure 2 a kind of research and development reference example of inventor, in the conductive film of this structure, transparent polymeric layer may
Because high-temperature process cracking, solvent volatilization, the defect formed in polymer cause etc. and containing a large amount of tiny flaws, Upper conductive
The conductive material of layer is easy to be through to underlying conductive layer from fault location, makes to be easier short circuit occur between two conductive layers.This
Kind short circuit problem causes product to be not sufficiently stable, and fraction defective is very high, cannot achieve real industrial large-scale production, is especially making
Make more serious when large scale conductive film.
Although inventor also attempted the thickness for improving upper layer substratum transparent as far as possible, and then prevented Upper conductive layer under
The problems such as short circuit between layer conductive layer, it has however been found that its to product stability and yield is promoted in terms of effect it is very limited,
As shown in fig. 6, and effect resistant to bending it is also bad.
Refering to Fig. 3 and Fig. 5, wherein the 3rd UV glue-line with a thickness of 8 microns, the grid that is imprinted on the 3rd UV glue-line
The depth of shape groove is 5 microns.It can be seen from the figure that when reinforcement i.e. the 2nd UV glue-line of insulation support layer is with a thickness of 5 microns
Or at 5 microns or more, yield is close to 100%.It should be noted that yield mentioned here, which refers to, increases reinforcement insulation
After supporting layer, to the yield that the layer short circuit situation of the first conductive layer and the second conductive layer is tested, yield is higher, and interlayer is short
The probability on road is smaller.
It further, can be with the material of the 3rd UV glue-line not as the material for reinforcing the 2nd UV glue-line of insulation support layer
Together, it is easier to be bonded between the UV glue-line of different materials, or reinforces the material of insulation support layer and the material of the 3rd UV glue-line
Matter refringence is less than 0.3, the identical or similar material of such two kinds of refractive index, will not or hardly reduce the saturating of product
Light rate.The grid groove of the first UV glue-line and the 3rd UV glue-line is formed using pattern imprint technology, the conductive material
For conductive metal material or non-metallic conducting material, the preferably conductive materials such as silver, copper or graphene.
Preferably, the first UV glue-line with a thickness of 8-12 microns, first conductive layer with a thickness of 4-5 microns；
The 3rd UV glue-line with a thickness of 8-12 microns, second conductive layer with a thickness of 4-5 microns；The reinforcement insulating supporting
Layer with a thickness of 5-10 microns.
In order to realize the function of multi-point touch, in addition to being provided with conductive layer on above-mentioned two layers of substratum transparent, be additionally provided with by
Conductive layer is connected lead district with external data processing equipment, and lead district is distributed on at least side of conductive layer periphery, and
And the electrical connection area of lead district, referring to Fig. 7, which is the area as made of a plurality of lead convergence connecting with the conductive layer
Domain.
The first conductive layer and first lead area are provided on first UV glue-line, first lead area is by a plurality of and first is conductive
Region made of the lead convergence of layer connection；The second conductive layer and the second lead district, the second lead are provided on 3rd UV glue-line
Area is the region as made of a plurality of lead convergence connecting with the second conductive layer.The first UV glue-line is patterned coining simultaneously
It is solidified to form the aligning graph of the latticed groove of the first conductive layer, the lead groove in first lead area and the first contraposition mark
Groove, the aligning graph of the latticed groove of first conductive layer, the lead groove in first lead area and the first contraposition mark
Groove is filled with conductive material；The 3rd UV film surface is patterned coining and solidifies, and forms the second conductive layer
The aligning graph groove of latticed groove, the lead groove of the second lead district and the second contraposition mark, second conductive layer
The aligning graph groove of latticed groove, the lead groove of the second lead district and the second contraposition mark is filled with conductive material；
The figure of the first contraposition mark and the second contraposition mark in transparent conductive film product or is retained, or is cut.Institute
State the uncoated second layer UV solidification glue in electrical connection area in first lead area, the electrical connection of the second lead district of the 3rd UV glue-line
The electrical connection area in the first lead area of mono- UV glue-line of Qu Yu is not overlapped.
Further, according to the requirement of different application, the upper surface of the 3rd UV glue-line can be further described in this patent
It is provided with one layer of reinforcement insulation support layer again, is then provided with polymeric layer again on the reinforcement insulation support layer, it is described poly-
It closes nitride layer and forms latticed groove by pattern imprint, the latticed groove is filled with conductive material, and it is conductive to form third
Layer, third conductive layer can access casing or ground connection, thus as electro-magnetic screen layer.
Further, third conductive layer can also become heating layer external device and then to access electric current, in this way can be with
So that entire touch-control product is low temperature resistant, can keep stablizing under the relatively low working environment of temperature.
Further, one layer of insulating strength insulation can be further added by the surface of the third conductive layer as electro-magnetic screen layer
Supporting layer, be then provided with again on the reinforcement insulation support layer polymeric layer by pattern imprint formed it is latticed recessed
Slot, the latticed groove are filled with conductive material, form the 4th conductive layer, and the 4th conductive layer can also be connect in turn with external device
Enter electric current, becomes heating layer.Conductive film product entire so just has four layers of conductive layer, according to different application scenarios,
It is especially emphasizing safe environment, or is emphasizing the environment of low-temperature working, then wherein two conductive layers can be used and be used as touching
Control display is used, and one layer of conductive layer is used as electro-magnetic screen layer, and another layer uses as heating layer, allows product in low temperature
Environment does not influence the use of touch-control, meanwhile, electromagnetic shielding is safer, does not illustrate in figure.
The present embodiment additionally provides the preparation method of the capacitance touching control layer of above-mentioned ultrathin flexible touching display screen, including as follows
Key step:
1, first in the surface coating UV solidification glue of transparent substrates.
Before the surface coating UV solidification glue of transparent substrates, preferable carries out aging to transparent substrates.Certainly, according to
Different materials, transparent substrates can not also aging, but some materials not aging will appear linear dimension deviation up and down.Wherein, always
The mode of change, which can be for transparent substrates to be placed under the plasma hair dryer that temperature is 50~150 DEG C, handles 5~60s, to remove
The impurity of substrate surface, the property of stabilized baseplate；The material of transparent substrates can be PET, PC, PMMA etc., the thickness of transparent substrates
Degree is 50~200 microns.Above-mentioned UV solidification glue also could alternatively be thermohardening lacquer, but preferably UV glue.
2, it is then based on pattern imprint technology to carry out pattern imprint in UV solidification glue and solidify, is formed and have first
First UV glue-line of the lead groove of the latticed groove and first lead area of conductive layer.
The mode of pattern imprint, which may is that, is coating the first UV glue-line on a transparent substrate, by having graphical figure
The metal die of case is contacted with transparent substrates roll-in or concora crush mode, while or delay using the means such as ultra-violet curing, will be convex
The pattern of mould surface is transferred on the first UV glue-line of transparent substrates, to form graphical pattern of the cable as groove.Wherein should
The sideline of graphical pattern is groove, and the width of groove is 1~20 micron, and depth is 4~5 microns.The thickness of first UV glue-line
It is 8~12 microns.
3, conductive material is filled in the groove of the first UV glue-line, forms the first conductive layer and first lead area.
In this step, it doctor blade technique can be used is filled in the graphical groove that UV solidification glue surface imprint is formed and received
Rice silver paste；According to Self-leveling effect, during scratching silver paste, nanometer silver paste meeting autodeposition is in groove.In order to allow silver paste
It can be uniformly distributed in graphical groove, can be carried out by way of repeatedly scratching, it is ensured that silver particles riddle in groove.
It needs for be processed by shot blasting on UV solidification glue surface after the completion of blade coating, removes extra silver paste.First lead area is arranged first
The periphery of conductive layer.
4, in the surface coating UV solidification glue of the first UV glue-line, the 2nd UV glue-line is formed as reinforcement insulation support layer.It can
To use the high mirror surface roller of smooth mold or surface smoothness without any figure to imprint the 2nd UV glue-line
Or coating, can guarantee reinforcement insulation support layer in this way shows flatness.The thickness for reinforcing insulation support layer is preferably 5~10
Micron.Since lead district needs to be connected with the device of outside, the structure of subsequent processing damage lead district in order to prevent
Or electric conductivity, therefore the electrical connection area in first lead area cannot be coated with UV glue-line.Can also using it is selectively applied it is equal its
The 2nd UV glue-line is arranged in his mode.
5, further coating UV solidification glue forms the 3rd UV glue-line on the 2nd UV glue-line, is aligned in UV solidification glue
Pattern imprint simultaneously solidifies, and forms the 3rd UV with the latticed groove of the second conductive layer and the lead groove of the second lead district
Glue-line.
In order to ensure the position of the latticed recess region of the latticed recess region and the first conductive layer of the second conductive layer
Do not occur biggish deviation, the mold for imprinting the first UV glue-line and the 3rd UV glue-line all has a positioning target, and positioning target can be with
Have multiple, is respectively distributed to the surrounding of mold, and be not overlapped with other figures.It, will be on mold when imprinting the 3rd UV glue-line
Positioning target carries out contraposition processing with the positioning target being stamped on the first UV glue-line.The first UV glue-line coining has first pair
The aligning graph groove of bit identification；The aligning graph groove that the 3rd UV glue-line coining has the second contraposition to identify；Described first
The figure of contraposition mark and the second contraposition mark in transparent conductive film product or is retained, or is cut.
The periphery of the second conductive layer is arranged in second lead district, and the electrical connection area of the second lead district cannot be with first lead
The electrical connection area in area is overlapped.
6, conductive material is filled in the groove of the 3rd UV glue-line, forms the second conductive layer and the second lead district.
It is attached by first lead area and the second lead district with test equipment, the function and property of testing capacitor touch control layer
Energy.
Above-mentioned steps are the preparation method of the single capacitance touching control layer of ultrathin flexible touching display screen.
Since the step of making above-mentioned capacitance touching control layer is relatively more, if monolithic makes, efficiency is extremely low, and the present embodiment is above-mentioned
It is improved on the basis of preparation method, provides a kind of capacitance touching control for producing the ultrathin flexible touching display screen in enormous quantities
The preparation method of layer, including following key step:
1, first by roll-to-roll process, the surface of the transparent substrates after a roll of aging is coated with first layer UV solidification glue,
Pattern imprint is then carried out in UV solidification glue and is solidified, and forming an entire volume includes a plurality of end to end first UV glue-lines
Membrane material, that is, form the membrane material of continuous a plurality of first UV glue-line units, the first UV glue-line has the first conductive layer
Latticed groove, the lead groove in first lead area and the groove of positioning target.
2, the first of more a plurality of first UV glue-lines scraper in a manner of roll-to-roll blade coating in entire volume membrane material is used
Fill conductive material in the latticed groove of conductive layer, the lead groove in first lead area, formed a plurality of first conductive layers and
First lead area.
The mode of specific roll-to-roll blade coating are as follows: entire volume membrane material moves under the traction of automatic traction device, and spray head is automatic
Spray conductive material, it is more scraper perpendicular to moving direction, the top of membrane material is set and is contacted with membrane material, scraper remains stationary,
Membrane material is mobile, not will cause the waste of conductive material in this way and saves manpower, while automatic erasing head wiping the can also be arranged
The extra conductive material of one UV film surface.
3, by roll-to-roll process, it is coated with second layer UV solidification glue on the surface of the first UV glue-line, is solidified in second layer UV
Pattern-free coining is carried out on glue and is solidified, to form a plurality of reinforcements on the surface of a plurality of first UV glue-lines of entire volume membrane material
Insulation support layer, i.e. the 2nd UV glue-line, wherein the electrical connection area surface in the first lead area of the first UV glue-line is not coated with UV glue-line.
4, the positioning target on the mold to the 3rd UV glue-line of coining and the positioning target being stamped on the first UV glue-line
After being aligned, by roll-to-roll process, third layer is coated on the 2nd UV glue-line (reinforcing insulation support layer) of entire volume membrane material
UV solidification glue carries out pattern imprint and is solidified in UV solidification glue, and forming an entire volume includes a plurality of end to end thirds
The membrane material of UV glue-line, the lead groove of latticed groove and second lead district of the 3rd UV glue-line with the second conductive layer.
Due to having carried out contraposition processing, the latticed recess region of a plurality of second conductive layers of entire volume membrane material is respectively set
In the surface of the latticed recess region of a plurality of first conductive layers, the electrical connection area of the second all lead district draws with first
The electrical connection area in line area is staggered.
5, it uses and more scraper is filled out in the groove of a plurality of 3rd UV glue-lines of entire volume membrane material in a manner of roll-to-roll blade coating
Conductive material is filled, a plurality of second conductive layers and the second lead district are formed.
6, entire volume capacitance touching control layer electrolemma is sliced, obtains a plurality of capacitance touching control layers.
Above-mentioned preparation method makes it possible to produce in enormous quantities capacitance touching control layer, high production efficiency, while being scraped using roll-to-roll
The mode for applying conductive material can reduce the waste of conductive material, reduce production cost by taking nanometer silver paste as an example, one bottle of 500 milli
The nanometer silver paste risen needs members up to ten thousand.
Embodiment two
As shown in figure 4, present embodiment discloses the capacitance touching control layer of another ultrathin flexible touching display screen, including it is transparent
The first conductive layer 3 on a transparent substrate is arranged in substrate 1, and on the first conductive layer 3 the second conductive layer 6 is arranged in, and described
Transparent reinforcement insulation support layer 4 is provided between one conductive layer 3 and the second conductive layer 6, the setting of the second conductive layer 6 is solid
On reinforcement insulation support layer 4 after change；
What is different from the first embodiment is that first conductive layer of the present embodiment two is recessed by the grid being provided in transparent substrates 1
The conductive material filled in slot is formed.
It should be noted that the present embodiment two compares embodiment one, the first UV glue-line is eliminated, capacitance touching control layer is equivalent to
Thickness it is thinner, still, directly on a transparent substrate imprint grid groove effect, do not imprinted on UV light solidifying coating
The effect of grid groove is good, because coining solidifies after the completion, groove profile depth also in liquid condition when UV light solidifying coating imprints
It will not spring back.
The present embodiment two additionally provides the preparation method of above-mentioned capacitance touching control layer, including following key step:
(1) the latticed groove of pattern imprint in transparent substrates 1；
(2) conductive material is filled in the groove that step (1) has imprinted, and forms the first conductive layer 3；
(3) it is coated with the 2nd UV glue-line, i.e., transparent reinforcement insulation support layer 4 on the first conductive layer 3, and solidifies；
(4) the 3rd UV glue-line 5, the pattern imprint on the 3rd UV glue-line 5 are coated on transparent reinforcement insulation support layer 4
Latticed groove simultaneously solidifies；
(5) conductive material is filled in the groove that step (4) has imprinted, and forms the second conductive layer 6.
Above-mentioned steps (1) can be imprinted directly on transparent substrates (can be PET or PMMA) using mold and form net
Trellis groove, 4-5 microns of depth of groove, remaining step specific embodiment and parameter etc. are referring to first embodiment preparation method.
As the utility model further embodiment, following Fig. 8 ultrathin flexible touching display screen related with Fig. 9 is provided
Technical solution.
It from bottom to top include: OLED display layer as shown in figure 8, providing a kind of ultrathin flexible touching display screen, bonding
Layer, basal layer, the first conductive layer, insulation support layer, the second conductive layer, adhesive layer harden protective layer.
First conductive layer and the second conductive layer are all polymeric layer and its flush type metal mesh structure, constitute capacitance touching control
Layer.And it imprints glue and uses high molecular material resistant to bending, and conductive material uses the conduction of high tenacity thermosetting macromolecule dispersion
Slurry curing forms.
The production respectively of UV glue-line in insulation support layer and the second conductive layer, increases the buckle resistance of film.It also has
There is the insulating effect of the first conductive layer and the second conductive layer, and is also to be made of high molecular material resistant to bending.Adhesive layer is OCA
Deng；Basal layer uses ultra-thin materials, such as PET, PI, COP etc. of 15 μm~38 μ m thicks；Surface hardness can be used in hardening protective layer
For the flexible material of 6H, such as colourless PI or PET；OLED display layer is conventional flexible display screen.
As shown in figure 9, from bottom to top including: OLED display layer, adhesive layer, the second conductive layer, insulation support layer, first leads
Electric layer hardens basal layer.The difference of Fig. 9 embodiment and Fig. 8 embodiment is flexible touch module opposite direction fitting to OLED
Screen on, while to the transparent substrates of flexible touch module carry out cure process, in this way, being just omitted in Fig. 8 examples of implementation
Additional hardening protective layer is specially set, the number of plies on the one hand reducing the cost of product, process being omitted, reduces product,
Further reduce the thickness of flexible touch screen.
It should be noted that the dimensional parameters enumerated in above-mentioned each embodiment, merely to illustrating the utility model
Implementation state as long as the width of the groove is less than the limiting resolution of human eye, i.e., does not influence as aobvious by taking the width of groove as an example
Show the normal viewing of device.
The above is only the preferred embodiments of the utility model, and therefore it does not limit the scope of the patent of the utility model, all
Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is applied directly or indirectly in
Other related technical areas are also included in the patent protection scope of the utility model.
Claims (12)
1. a kind of ultrathin flexible touching display screen, including OLED display layer, it is characterised in that:
Adhesive layer and capacitance touching control layer are followed successively by the OLED display layer；
The capacitance touching control layer is disposed with the second conductive layer close to the side of OLED display layer, reinforces insulation support layer, the
One conductive layer, hardening basal layer, first conductive layer and the second conductive layer are the flush type metal in transparent polymeric layer
Network；
The transparent polymeric layer imprints glue using high molecular material resistant to bending, and the flush type metal mesh structure is by high tenacity
Heat curing type electrocondution slurry solidifies；
The reinforcement insulation support layer is the UV glue-line being separately provided.
2. ultrathin flexible touching display screen as described in claim 1, it is characterised in that:
The capacitance touching control layer includes transparent base layer, and the transparent base layer side is disposed with the first conductive layer, adds
Strong insulation support layer, the second conductive layer, the transparent base layer are hardening basal layer after hardening treatment；
One side of the capacitance touching control layer with the second conductive layer far from hardening basal layer is carried out with OLED display layer by adhesive layer
In conjunction with the hardening basal layer of the capacitance touching control layer is as outer layer.
3. ultrathin flexible touching display screen as described in claim 1, it is characterised in that: the adhesive layer is OCA optical cement；Institute
Hardening basal layer is stated using polyethylene terephtalate or polyimides PI or optical material COP.
4. ultrathin flexible touching display screen as described in claim 1, it is characterised in that:
The hardening basal layer is hardened to obtain by transparent substrates, is provided with the first UV glue-line on the hardening basal layer, described
It is provided on first UV glue-line and reinforces insulation support layer as the 2nd UV glue-line, be provided with the 3rd UV on the 2nd UV glue-line
Glue-line, the 3rd UV glue-line are bonded with OLED display layer；
The first UV glue-line is the first layer UV solidification glue being coated in transparent substrates layer surface, and the first UV glue-line carries out figure
Shapeization imprints and is solidified to form the latticed groove of the first conductive layer and the lead groove in first lead area, and described first is conductive
The latticed groove of floor and the lead groove in first lead area are filled with conductive material, the latticed groove of first conductive layer
Thickness with the depth of the lead groove in first lead area less than the first UV glue-line；
The first UV film surface is provided with the 2nd UV glue-line, and the 2nd UV glue-line is as reinforcement insulation support layer；
The 2nd UV film surface is provided with the 3rd UV glue-line, and the 3rd UV film surface, which is patterned, to be imprinted and consolidate
Change, formed the second conductive layer latticed groove and the second lead district lead groove, second conductive layer it is latticed recessed
Slot and the lead groove of the second lead district are filled with conductive material, the latticed groove and the second lead district of second conductive layer
Lead groove depth be not more than the 3rd UV glue-line thickness.
5. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the first UV glue-line is patterned
Imprint and be solidified to form pair of the latticed groove of the first conductive layer, the lead groove in first lead area and the first contraposition mark
Bitmap connected in star, pair of the latticed groove of first conductive layer, the lead groove in first lead area and the first contraposition mark
Bitmap connected in star is filled with conductive material, the latticed groove of first conductive layer, the lead groove in first lead area and
Thickness of the equal depth of the aligning graph groove of first contraposition mark less than the first UV glue-line；
The 3rd UV film surface is patterned coining and solidifies, and the latticed groove of the second conductive layer of formation, second are drawn
The aligning graph groove of the lead groove in line area and the second contraposition mark, the latticed groove of second conductive layer, second are drawn
The lead groove in line area and the aligning graph groove of the second contraposition mark are filled with conductive material, the net of second conductive layer
The depth of the aligning graph groove of trellis groove, the lead groove of the second lead district and the second contraposition mark is not more than the 3rd UV glue
The thickness of layer；
The figure of the first contraposition mark and the second contraposition mark in transparent conductive film product or is retained, or is cut out
It cuts.
6. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the 2nd UV glue-line with a thickness of 1
~10 microns.
7. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the 2nd UV glue-line and the 3rd UV glue
The material of layer is different, and the first UV glue-line and the 3rd UV glue line material are identical or different.
8. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the electrical connection area in the first lead area
It is not coated with and is furnished with second layer UV solidification glue, the electrical connection area of the second lead district of the 3rd UV glue-line and the first of the first UV glue-line
The electrical connection area of lead district is not overlapped.
9. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the transparent substrates and the first UV
It is coated with adhesion promoting layer between glue-line or does tackified finish；
And/or adhesion promoting layer is coated between the first UV glue-line and the 2nd UV glue-line or does tackified finish；
And/or adhesion promoting layer is coated between the 2nd UV glue-line and the 3rd UV glue-line or does tackified finish.
10. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the 2nd UV glue-line is first
The composite layer that the multiple coating UV solidification glue of UV film surface is formed, the electrical connection area surface in the first lead area does not cover second
UV glue-line.
11. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: first conductive layer and second is led
The lead groove of the latticed groove of electric layer and first lead area and the second lead district filled with nanometer silver paste or nano copper slurry or
Grapheme material or silver nanowire or carbon nano-tube material.
12. ultrathin flexible touching display screen as claimed in claim 4, it is characterised in that: the upper surface of the 3rd UV glue-line
Be arranged matcoveredn, the protective layer be polymeric layer, the first UV glue-line, the 2nd UV glue-line, the 3rd UV glue-line, protective layer and thoroughly
Bright substrate is formed together composite transparent conductive film, the electrical connection area of the second lead district of the 3rd UV glue-line and the first UV glue-line
The electrical connection area in first lead area be not overlapped.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111341223A (en) * | 2020-04-09 | 2020-06-26 | 大连集思特科技有限公司 | Multilayer flexible transparent display circuit, display screen and manufacturing method thereof |
| CN111402734A (en) * | 2020-03-26 | 2020-07-10 | 武汉华星光电半导体显示技术有限公司 | Flexible display module, preparation method thereof and flexible display device |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111402734A (en) * | 2020-03-26 | 2020-07-10 | 武汉华星光电半导体显示技术有限公司 | Flexible display module, preparation method thereof and flexible display device |
| CN111341223A (en) * | 2020-04-09 | 2020-06-26 | 大连集思特科技有限公司 | Multilayer flexible transparent display circuit, display screen and manufacturing method thereof |
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