CN103345324A - Touch display screen and optical filter assembly thereof - Google Patents
Touch display screen and optical filter assembly thereof Download PDFInfo
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- CN103345324A CN103345324A CN2013102824707A CN201310282470A CN103345324A CN 103345324 A CN103345324 A CN 103345324A CN 2013102824707 A CN2013102824707 A CN 2013102824707A CN 201310282470 A CN201310282470 A CN 201310282470A CN 103345324 A CN103345324 A CN 103345324A
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Abstract
An optical filter assembly comprises a substrate, an imprinting adhesive layer, a conductive layer, a conductive bridge and a filter layer, wherein the imprinting adhesive layer is arranged on one side of the substrate; the conductive layer is arranged on one side of the imprinting adhesive layer in an embedding mode and comprises a first conductive pattern and at least two second conductive pattern units, and the at least two second conductive pattern units are located on the two opposite sides of the first conductive pattern to form an induction structure; the conductive bridge is arranged on the imprinting adhesive layer, the two second conductive pattern units are electrically connected through the conductive bridge, the conductive bridge crosses the first conductive pattern, and an insulating layer is arranged between the conductive bridge and the first conductive pattern; the filter layer is arranged on the side, provided with the conductive layer, of the imprinting adhesive layer and comprises a shading part and a filtering part, the shading part is shaped like grids and comprises mutually-intersected grid lines and a plurality of grid units, the filtering part comprises a plurality of filtering units, and each filtering unit is contained in a corresponding grid unit. Thus, the optical filter assembly not only can perform touch control operation, but also has the filtering function, is favorable for reducing the thickness of an electronic product and saves material and assembly cost. Meanwhile, a touch display screen is provided.
Description
Technical field
The present invention relates to the touch technology field, particularly relate to a kind of touch display screen and optical filter box thereof.
Background technology
Touch-screen is the inductive arrangement that can receive input signals such as touch.Touch-screen has given information interaction brand-new looks, is extremely attractive brand-new information interaction equipment.The development of touch screen technology has caused the common concern of domestic and international information medium circle, has become the Chaoyang new high-tech industry that the photoelectricity industry is a dark horse.
At present, having the electronic product that touches Presentation Function includes display screen and is positioned at touch-screen on the display screen.Yet, touch-screen as with display screen assembly independently, when being used for the electronic product that some realize man-machine interactions, all need to order according to the size that shows screen, assemble again afterwards.The assembling of existing touch-screen and display screen mainly contains dual mode, and namely frame pastes and full the applying.The frame subsides are to be fitted in the edge of touch-screen and display screen, and full applying is whole the applying of upper surface with lower surface and the display screen of touch-screen.
Display screen mainly comprises stacked polaroid, optical filter box, diaphragm, Liquid Crystal Module and thin film transistor (TFT) (Thin Film Transistor; element such as TFT); therefore; display screen itself has had bigger thickness, and when continuing on the display screen applying touch-screen, will further increase its thickness; moreover; many one attaching process, just meaning has increased the bad probability of product, increases production cost of products greatly.
Summary of the invention
Based on this, be necessary to reach the cost problem of higher more greatly at thickness, a kind of touch display screen and optical filter box thereof that is conducive to reduce electronic product thickness and production cost is provided.
A kind of optical filter box comprises substrate, it is characterized in that, also comprises:
The impression glue-line covers the side in described substrate, and described impression glue-line is formed with first groove and second groove away from a side of described substrate;
Conductive layer, be embedded at described impression glue-line away from a side of described substrate, comprise first conductive pattern and at least two second conductive pattern unit, described at least two second conductive pattern unit are positioned at the relative both sides of described first conductive pattern, described first conductive pattern and the described second conductive pattern unit include the conductive grid that is intersected to form mutually by conductive thread, conductive thread intersects to form grid node, described conductive grid comprises a plurality of grid cells, described first conductive pattern and space, the described second conductive pattern unit form induction structure, the conductive thread of described first conductive pattern is contained in described first groove, and the conductive thread of the described second conductive pattern unit is contained in described second groove; And
Be located at the conducting bridge of described impression glue-line, two second conductive pattern unit that are positioned at the relative both sides of same described first conductive pattern are electrically connected by described conducting bridge, described conducting bridge stride across described first conductive pattern and and described first conductive pattern between be provided with insulation course, the described second conductive pattern unit at described conducting bridge and conducting bridge two ends constitutes second conductive pattern;
Filter layer, cover a side that is provided with conductive layer in described impression glue-line, described filter layer comprises light shielding part and optical filtering portion, described light shielding part is lattice-shaped, comprise some cross one another gridlines and a plurality of grid cell, described optical filtering portion comprises a plurality of filter units, and each described filter unit is contained in a described grid cell accordingly.
Among embodiment, the projection of conductive thread on described filter layer of the conductive thread of described first conductive pattern and the second conductive pattern unit all is positioned at described gridline therein.
Among embodiment, the width of described conductive thread is between 0.2 to 5 micron therein, and the distance between the adjacent described grid node is between 10 to 500 microns.
Therein among embodiment, described conducting bridge is embedded at described insulation course away from a side of described impression glue-line, described insulation course covers described first conductive pattern and the second conductive pattern unit, described conducting bridge comprises bridge part and is arranged at the portion of running through at described bridge part two ends respectively, and described insulation course is run through to be electrically connected adjacent respectively and to be positioned at two second conductive pattern unit of the relative both sides of described first conductive pattern in the described portion of running through.
Among embodiment, each described portion of running through is connected at least two conductive threads of the corresponding second conductive pattern unit therein.
Among embodiment, described conducting bridge is the electrically conducting transparent bridge therein, and described conducting bridge covers in described surface of insulating layer, and is electrically connected with two second conductive pattern unit that are positioned at the relative both sides of same described first conductive pattern.
Therein among embodiment, the thickness of described optical filtering portion is not less than the thickness of described light shielding part.
Therein among embodiment, the live width of the conductive thread of the conductive thread of described first conductive pattern and the second conductive pattern unit is all less than the live width of described gridline.
Therein among embodiment, one of them person's grid cell and described filter unit similar fitgures each other in described first conductive pattern and the described second conductive pattern unit, the center line of the conductive thread of at least one conductive pattern is in the projection of described filter layer and the central lines of described gridline in described first conductive pattern and the described second conductive pattern unit.
Among embodiment, comprise and fill and lead up layer therein, cover a side that is provided with conductive layer in described impression glue-line, the described layer of filling and leading up is between described conductive layer and described filter layer.
Therein among embodiment, the conductive thread of described first conductive pattern and the second conductive pattern unit is respectively to be solidify to form by the conductive material that is filled in described first groove and second groove, and described conductive material comprises at least a in metal, carbon nano-tube, Graphene, tin indium oxide and the conducting polymer.
Among embodiment, hold a described filter unit in the scope of each described grid cell of described first conductive pattern and the described second conductive pattern unit at least therein.
A kind of touch display screen comprises the TFT electrode, Liquid Crystal Module, described optical filter box and the polaroid that stack gradually.
Above-mentioned touch display screen and optical filter box thereof, optical filter box can be realized touch control operation and filtering functions simultaneously, combination as indispensable two assemblies in the display screen, when being used for display screen, can directly make display screen have touch controllable function, need not to assemble a touch-screen at display screen again, not only be conducive to reduce the thickness of electronic product, also saved material and assembly cost simultaneously greatly.In addition, when utilizing above-mentioned optical filter box to prepare touch display screen, can reduce attaching process one time, thus but economical with materials and enhancing productivity also.
Description of drawings
Fig. 1 is the structural representation of the touch display screen of an embodiment;
Fig. 2 is the structural representation of the optical filter box of an embodiment;
Fig. 3 is the structural representation of the optical filter box of another embodiment;
Fig. 4 is the structural representation of the optical filter box of another embodiment;
Fig. 5 is again the structural representation of the optical filter box of an embodiment;
Fig. 6 is the structural representation at another visual angle of optical filter box shown in Figure 5;
Fig. 7 is the grid cell of conductive grid and the grid cell in light shield layer structural representation one to one;
Fig. 8 is the grid cell structural representation corresponding with grid cell in the light shield layer of the conductive grid of an embodiment;
Fig. 9 is the grid cell structural representation corresponding with grid cell in the light shield layer of the conductive grid of another embodiment;
Figure 10 is the grid cell structural representation corresponding with grid cell in the light shield layer of the conductive grid of another embodiment;
Figure 11 is the optical filter box preparation method's of an embodiment schematic flow sheet;
Figure 12 is the schematic flow sheet of the formation light shielding part of an embodiment;
Figure 13 is the schematic flow sheet of the formation conducting bridge of embodiment one;
Figure 14 is the schematic flow sheet of the formation conducting bridge of embodiment two;
Figure 15 is the schematic flow sheet of the formation conducting bridge of embodiment three.
Embodiment
For above-mentioned purpose, the feature and advantage that make touch display screen and optical filter box thereof can become apparent more, be described in detail below in conjunction with the embodiment of accompanying drawing to touch display screen and optical filter box thereof.A lot of details have been set forth in the following description so that fully understand touch display screen and optical filter box.But touch display screen and optical filter box thereof can be implemented much to be different from alternate manner described here, those skilled in the art can do similar improvement under the situation of touch display screen and optical filter box intension thereof, so touch display screen and optical filter box thereof are not subjected to the restriction of following public concrete enforcement.
Need to prove that when element is called as " being fixed in " another element, can directly can there be element placed in the middle in it on another element or also.When an element is considered to " connection " another element, it can be to be directly connected to another element or may to have element placed in the middle simultaneously.
Unless otherwise defined, the employed all technology of this paper are identical with the implication of the those skilled in the art's common sense that belongs to touch display screen and optical filter box thereof with scientific terminology.Employed term is not intended to be restriction the present invention just in order to describe the purpose of specific embodiment in the instructions of touch display screen and optical filter box thereof herein.
The present invention proposes to be conducive to reduce touch display screen and the optical filter box thereof of electronic product thickness and production cost.This optical filter box can be realized touch operation and filtering functions, thereby makes touch display screen have the touch Presentation Function.
Seeing also Fig. 1, is the touch display screen 100 of an embodiment, comprises following polaroid 10, TFT electrode 20, Liquid Crystal Module 30, public electrode 40, diaphragm 50, the optical filter box 200 that stacks gradually and goes up polaroid 60.In other embodiment, need not to arrange diaphragm 50 and also can.
Be appreciated that when using backlight as polarized light source as the OLED polarized light source, need not down polaroid 10, only needing upward, polaroid 60 gets final product.Structure and the function of the following polaroid 10 of present embodiment, TFT electrode 20, Liquid Crystal Module 30, public electrode 40, diaphragm 50, last polaroid 60 can be identical with existing product, do not repeat them here.In other embodiment, also diaphragm 50 can be set.
But touch display screen 100 has tangible operation and filtering functions simultaneously, makes display screen have the touch Presentation Function.Touch display screen 100 can be the LCDs of straight-down negative or side entering type light source.
Following emphasis is described optical filter box 200.
See also Fig. 2, optical filter box 200 comprises substrate 210, impression glue-line 220, conductive layer 230, insulation course 240 and filter layer 250.The material of substrate 210 can be sillico aluminate glass and calcium soda-lime glass, handles the rear surface through Plasma and has good cohesive force.General, the thickness range of substrate 210 can be 0.1mm～0.5mm.
Impression glue-line 220 covers the side in substrate 210, and impression glue-line 220 is formed with first groove 222 and second groove 224 away from a side of substrate 210.The material of impression glue-line 220 can be ultraviolet cured adhesive (uitraviolet, UV), light binding, hot-setting adhesive or dried glue etc. certainly, impressing the material that glue-line 220 adopts in the present embodiment is solvent ultra-violet curing acrylic resin, the material of impression glue-line 220 is transparent, does not influence the integral light-transmitting rate of this touch display screen 100.
Conducting bridge 236 is arranged at impression glue-line 220, two second conductive pattern unit 234 that are positioned at same first conductive pattern 232 relative both sides are electrically connected by conducting bridge 236, conducting bridge 236 stride across first conductive pattern 232 and and first conductive pattern 232 between be provided with insulation course 240, conducting bridge 236 and first conductive pattern 232 are by insulation course 240 insulation, and the second conductive pattern unit 234 at conducting bridge 236 and conducting bridge 236 two ends constitutes second conductive pattern.The thickness of insulation course 240 is 1 micron～5 microns.Insulation course 240 is transparence, does not influence whole transmitance.Insulation course 240 materials are insulating material, can be solvent-free ultra-violet curing acrylic resin, can also be visible-light curing resin, heat reactive resin.
Above-mentioned optical filter box 200, the first conductive patterns 232 and the second conductive pattern unit 234 arrange at interval, constitute the capacitive sensing structure, make optical filter box 200 can realize touch control operation and filtering functions simultaneously, and the design that need not to put up a bridge, and have reduced task difficulty.When above-mentioned optical filter box 200 is applied to display screen, can directly make display screen have touch controllable function, need not to assemble a touch-screen at display screen again, not only be conducive to reduce the thickness of electronic product, also save material and assembly cost greatly.By conducting bridge 236 electrical connection of a plurality of second conductive pattern unit 234 of second conductive pattern is got up, an electrical leads only need be set in follow-up be used for drawing second conductive pattern, save operation, guarantee the product yield.
When optical filter box 200 is applied to product, generally be that substrate 210 is positioned near eyes of user one side, and filter layer 250 is positioned at away from eyes of user one side, so when conductive layer 230 is between filter layer 250 and substrate 210, be not more than the live width of gridline as long as guarantee the live width of conductive thread a, just can not influence the light transmission of optical filtering portion 254, because directly sheltered from by light shielding part 252 from the light of polaroid 10 directions projection down, and light shielding part 252 has opaqueness.
Among embodiment, the projection of conductive thread a on filter layer 250 of the conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 all is positioned at gridline therein.As shown in Figure 4, expression is the live width of the conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 optical filter box 200 when equaling the width of gridline.As Fig. 2, Fig. 3 and shown in Figure 5, expression be the live width of conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 optical filter box 200 during all less than the width of gridline.The live width of conductive thread a is not more than the width of gridline, make conductive thread a complete in the zone that is covered in light shielding part 252, and can not drop on the filter unit zone because of partially conductive silk thread a, avoid the chromatic photoresist of the filter unit of conductive thread a to form shading, to avoid influencing the light emission rate of filter unit, improve user's experience sense.In addition, because conductive thread a is blocked, thereby not high for the width requirement of conductive thread a, the width that namely is not more than gridline gets final product.Therefore, can make (need not to do very thin) easy to make, and wideer conductive thread a easy fracture not, and then can promote the reliability of conductive layer 230.
Therein among embodiment, first conductive pattern 232, the second conductive pattern unit 234 can be not with light shielding part 252 over against.Be that the mesh lines of conductive thread a and the gridline of light shielding part 252 can be not used as the contraposition processing, but for obtaining visually-clear, the reasonable wide of conductive thread a line a is set to 0.2 micron～5 microns, be preferably 0.5 micron～2 microns, conductive thread a intersects to form mesh node mutually, distance between the adjacent mesh node rationally is set to 10 microns～500 microns, is preferably 50 microns～500 microns.
See also Fig. 2, in one embodiment, conducting bridge 236 is embedded at insulation course 240, insulation course 240 covers first conductive pattern 232 and the second conductive pattern unit 234, conducting bridge 236 comprises bridge part 2362 and is separately positioned on the portion of running through 2364 at bridge part 2362 two ends, runs through portion 2364 and runs through insulation course 240 to be electrically connected two second conductive pattern unit 234 that are positioned at same first conductive pattern 232 relative both sides respectively.
Particularly, conductive layer 230 is embedded in the impression glue-line 220, and conducting bridge 236 is embedded at insulation course 240 away from a side of impression glue-line 220.Conducting bridge 236 comprises bridge part 2362, and the portion of running through 2364 that is positioned at the two ends of bridge part 2362, run through portion 2364 and run through insulation course 240, and connecting two second conductive pattern unit 234 being positioned at same first conductive pattern 232 relative both sides, conducting bridge 236 is by insulating with corresponding first conductive pattern 232 with insulation course 240 between first conductive pattern 232 at it.Run through portion 2364 and bridge part 2362 all is filled with conductive material, make bridge part 2362 and run through portion's 2364 conductions, bridge part 2362 comprises the conductive grid that is made of conductive thread a, runs through portion 2364 and comprises the conductive grid that is made of conductive thread a.Be embedded at conducting bridge 236 in the insulation course 240 and can be subjected to the protection of insulation course 240, avoid in follow-up operation, damaging.
In present embodiment, each runs through at least two conductive thread a that portion 2364 is connected in the corresponding second conductive pattern unit 234.If wherein conductive thread a fracture, but still conducting of another conductive thread a, to guarantee the electrically validity of overlap joint, two second conductive pattern unit 234 avoiding adjacent and be positioned at first conductive pattern, 232 both sides are not electrically connected.
See also Fig. 3, in other embodiments, conducting bridge 236 also can directly cover in insulation course 240 surfaces, and be electrically connected with two second conductive pattern unit 234 that are positioned at same first conductive pattern 232 relative both sides, and conducting bridge 236 is the electrically conducting transparent bridge, guarantees the integral light-transmitting rate of this touch display screen.Conducting bridge 236 is formed by conductive thread a cross connection, is conducive to increase the penetrability of conductive layer 230.
See also Fig. 5 and Fig. 6, in present embodiment, optical filtering portion 254 comprises a plurality of filter units.Filter unit is transparent chromatic photoresist, is specially the photoresist that has coloured dye and forms, and can adopt exposure-developing manufacture process.That filter unit is generally is red (red, R) photoresistance, it is green that (green, G) (blue, B) photoresistance are used for making incident light be transformed into monochromatic light, realize filtering functions for photoresistance or indigo plant.Light shielding part 252 is formed at the side that impression glue-line 220 is provided with conducting bridge 236 for the photoresist that has black dyes, and light shielding part 252 is lattice-shaped, has opaqueness, can adopt exposure-developing manufacture process.Grid cell is square in the lattice-shaped, makes that the photoresistance arrangement of optical filtering portion 254 is compacter evenly, and can increase the contrast of R, G, B light.Light shielding part 252 can effectively be avoided chromatic photoresist colour contamination each other.
See also Fig. 6, in present embodiment, conductive thread a is straight line, curve or broken line.Conductive thread a can select difformity, is conducive to reduce production requirement, when conductive thread a is curve or broken line, also can avoid serious Moire fringe simultaneously, further improves user's experience sense.
The thickness of optical filtering portion 254 is not less than the thickness of light shielding part 252.Be the thickness that the thickness of filter unit is greater than or equal to gridline.As Fig. 2, Fig. 3 and shown in Figure 4, expression be the thickness that the thickness of optical filtering portion 254 in the optical filter box 200 equals light shielding part 252.As shown in Figure 5, expression is that the thickness of optical filtering portion 254 in the optical filter box 200 is greater than the thickness of light shielding part 252.When the thickness of optical filtering portion 254 during greater than the thickness of light shielding part 252, from the light that optical filtering portion 254 appears, not only can see from the front, also can see from the side, thereby can increase the light emission rate of optical filtering portion 254.
In present embodiment, the thickness of first conductive pattern 232 less than first groove 222 the degree of depth, the thickness of the second conductive pattern unit 234 is less than the degree of depth of second groove 224.The conductive thread a that is conducive to impress in 220 pairs of first conductive patterns 232 of glue-line and second conductive pattern 234 forms protection.The degree of depth of described first groove 222 and second groove 224 is less than the thickness of impression glue-line 220.Preventing that impressing mould from pressing wears impression glue-line 220 and to damage substrate 210.
One of them person's grid cell and filter unit similar fitgures each other in first conductive pattern 232 and the second conductive pattern unit 234, the center line of the conductive thread a of at least one conductive pattern is in the projection of filter layer 250 and the central lines of gridline in first conductive pattern 232 and the second conductive pattern unit 234.Be that conductive thread a is over against gridline.Conductive grid intersects to form for conductive thread a, and grid cell is cut apart by gridline and formed, and filter unit is formed at grid cell.So in the present embodiment, the shape that can make conductive grid is identical with the shape of filter unit but vary in size, and namely conductive grid and filter unit similar fitgures each other guarantee that simultaneously conductive thread a does not exceed gridline.In present embodiment, the center line of the conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 the projection of filter layer 250 all with the central lines of gridline.Further reduce conductive thread a and exposed the probability in gridline zone.Certainly, in other embodiment, the only center line of the conductive thread a of arbitrary conductive pattern and the central lines of gridline.
See also Fig. 5, in present embodiment, the conductive thread a of the conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 is solidify to form by the conductive material that is filled in first groove 222 and second groove 224, conductive material can be among metal, carbon nano-tube, Graphene, organic conductive macromolecule and the ITO any one, be preferably metal, as nanometer silver paste.First conductive pattern 232 and the second conductive pattern unit 234 comprise the continuous conduction grid, and conductive grid is intersected to form by conductive thread a.Conductive thread a can be by impressing second groove 224 that first groove 222 that obtains shape and first conductive pattern, 232 couplings and shape and second conductive pattern mate on the glue-line 220 earlier at impression, the filled conductive material makes in the groove structure again.Therefore, can pass through the impressing mould one-shot forming, the pattern that obtains presetting, and need not be by graphical etching, thereby simplify flow process.Special when using ITO as conductive material, owing to need not etching, thus reduced waste of material, and then save cost.Adopt first groove 222 and second groove 224 to form conductive layer 230, make conductive material be not limited to traditional ITO, thereby increased the selection face of conductive material.
At least accommodate a filter unit in the scope of each grid cell of first conductive pattern 232 and the second conductive pattern unit 234.As shown in Figure 7, the range content of each grid cell of first conductive pattern 232 and second conductive pattern 234 has been received a filter unit.Because the conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 all is embedded in the gridline, so the filter unit that holds is integer, quantity is one.Because each grid cell is to there being a conductive grid, so the density of conductive grid is bigger, electric conductivity is better.
To shown in Figure 10, each conductive grid of first conductive pattern, 232 second conductive pattern unit 234 accommodates at least two filter units as Fig. 8.Because the conductive thread a of first conductive pattern 232 and the second conductive pattern unit 234 all is embedded in the gridline, so the filter unit that holds is integer, quantity is at least two.
Can be divided into three kinds of situations this moment, and laterally to be X-axis, the direction of vertical transverse is Y-axis.As shown in Figure 8, only on X-direction, each conductive grid of first conductive pattern 232 and the second conductive pattern unit 234 holds at least two filter units.As shown in Figure 9, only on Y direction, each conductive grid of first conductive pattern 232 and the second conductive pattern unit 234 holds at least two filter units.As shown in figure 10, on X-axis and Y direction, each conductive grid of first conductive pattern 232 and the second conductive pattern unit 234 holds at least two filter units simultaneously.
In present embodiment, comprise and fill and lead up layer 260, cover a side that is provided with conductive layer 230 in impression glue-line 220, fill and lead up layer 260 between conductive layer 230 and filter layer 250.Be provided with the surface-coated UV glue of conducting bridge 236 at impression glue-line 220, form and fill and lead up layer 260.Because of after impression glue-line 220 is carried out imprint process and bridging technology, can cause impression glue-line 220 surface irregularities unavoidably, so before carrying out follow-up making, can arrange impression glue-line 220 surfaces that are provided with conductive layer 230 and fill and lead up layer 260, so that impression glue-line 220 surfacings, convenient follow-up filter layer 250 better covers, as Fig. 3, Fig. 4 with Figure 5 shows that and be provided with the optical filter box 200 of filling and leading up layer 260.Even it is pointed out that not arrange fills and leads up layer 260, also can realize covering the purpose of filter layer 250.This material of filling and leading up layer 260 can be transparent heat reactive resin or UV cured resin etc., and in the present embodiment, the material of filling and leading up layer 260 can be the UV cured resin.
In addition, also provide a kind of optical filter box 200 preparation methods.
See also Figure 11, optical filter box 200 preparation methods comprise step S110～S180:
Step S110 provides a substrate 210.
210 carryings of substrate and protective effect, and light-permeable.The material of substrate 210 and the effect as mentioned above, so do not repeat them here.Before carrying out subsequent step, also can carry out plasma (Plasma) pre-service to substrate 210, removing the dirty of substrate 210 surfaces, and make substrate 210 surface ionizations, increase cohesive force follow-up and impression glue-line 220.
Step S120 applies impression glue in a side of described substrate 210, forms impression glue-line 220.Impression glue is transparence, does not influence whole transmitance.In the present embodiment, the material of impression glue is solvent-free ultra-violet curing acrylic resin.It is pointed out that in other embodiments impression glue material can also be visible-light curing resin, heat reactive resin etc.
Step S130 impresses described impression glue-line 220 away from a side of described substrate 210, forms first groove 222 and second groove 224, and described first groove 222 arranges at interval with described second groove 224.First groove 222 and second groove 224 are the groove of reservation shape, namely can be preset to required figure as required.Particularly, use with the corresponding impression formboard in first conductive pattern 232 and the second conductive pattern unit 234 in impression glue-line 220 and substrate 210 facing surfaces and to impress, and ultraviolet ray (UV) is solidified, obtain first groove 222 with first conductive pattern 232 coupling, with second groove 224 of the second conductive pattern unit, 234 couplings.
Step S140, filled conductive materials and make its curing in described first groove 222 and described second groove 224, the conductive material that is contained in described first groove 222 solidify to form first conductive pattern 232, the conductive material that is contained in described second groove 224 solidify to form the second conductive pattern unit 234, and the described second conductive pattern unit 234 is positioned at the relative both sides of described first conductive pattern 232.
Particularly, conductive material can be among metal, carbon nano-tube, Graphene, organic conductive macromolecule and the ITO any one, therefore, can pass through the impressing mould one-shot forming, the pattern that obtains presetting, and need not be by graphical etching, thereby simplify flow process.Special when using ITO as conductive material, owing to need not etching, thus reduced waste of material, and then save cost.Adopt first groove 222 and second groove 224 to form conductive layer 230, make conductive material be not limited to traditional ITO, thereby increased the selection face of conductive material.
This conductive material forms the conductive grid that is made of conductive thread a intersection.Be preferably metal, as nanometer silver paste.When selecting metal for use, the energy consumption that can reduce resistance and reduce touch display screen.The conductive thread a that the conductive thread a of first conductive pattern 232 is contained in first groove, 222, the second conductive pattern unit 234 is contained in second groove 224.First groove 222 and second groove 224 arrange at interval, and the second conductive pattern unit 234 is positioned at the relative both sides of first conductive pattern 232, can make the conductive thread a of first conductive pattern 232 and the conductive thread a space of the second conductive pattern unit 234 form induction structure.
Step S150, lay conducting bridge 236, a side that is filled with conductive material at described impression glue-line 220 arranges insulation course 240, conducting bridge 236 is set in the side of described insulation course 240 away from described impression glue-line 220, and described insulation course 240 is between described conducting bridge 236 and described first conductive pattern 232, and described conducting bridge 236 is electrically connected two second conductive pattern unit 234 that are positioned at same described first conductive pattern 232 relative both sides.
Particularly, conducting bridge 236 stride across first conductive pattern 232 and and first conductive pattern 232 between be provided with insulation course 240, conducting bridge 236 and first conductive pattern 232 are by insulation course 240 insulation, conducting bridge 236 is electrically connected adjacent and is positioned at two second conductive pattern unit 234 of described first conductive pattern 232 relative both sides, the second conductive pattern unit 234 at conducting bridge 236 and conducting bridge 236 two ends constitutes second conductive pattern, and this second conductive pattern and first conductive pattern 232 form conductive layer 230.The thickness of insulation course 240 is 1 micron～5 microns.Insulation course 240 is transparence, does not influence whole transmitance.Insulation course 240 materials are insulating material, can be solvent-free ultra-violet curing acrylic resin, can also be visible-light curing resin, heat reactive resin.
Step S160 lays and fills and leads up layer 260, is provided with the surface-coated impression glue of conducting bridge 236 and makes its curing at impression glue-line 220, forms and fills and leads up layer 260.Be provided with the surface-coated UV glue of conducting bridge 236 at impression glue-line 220, form and fill and lead up layer 260.Because of after impression glue-line 220 is carried out imprint process and bridging technology, can cause impression glue-line 220 surface irregularities unavoidably, so before carrying out follow-up making, can arrange impression glue-line 220 surfaces that are provided with conducting bridge 236 and fill and lead up layer 260, so that impression glue-line 220 surfacings, convenient follow-up filter layer 250 better covers, and is illustrated in figure 5 as to be provided with the optical filter box 200 of filling and leading up layer 260.Even it is pointed out that not arrange fills and leads up layer 260, also can realize covering the purpose of filter layer 250.This material of filling and leading up layer 260 can be transparent heat reactive resin or UV cured resin etc., and in the present embodiment, the material of filling and leading up layer 260 can be the UV cured resin.
Step S170 lays light shielding part 252, and a side that is provided with conducting bridge 236 at impression glue-line 220 forms by the cross one another light shielding part 252 of gridline, and described light shielding part 252 is lattice-shaped structure, comprises a plurality of grid cells.In the present embodiment, because of be provided with fill and lead up the layer 260, so with light shielding part 252 be formed on the impression glue-line 220 be provided with a side of conducting bridge 236 and specifically be positioned at fill and lead up the layer 260 away from the impression glue-line 220 surfaces.
Step S180 lays optical filtering portion 254, applies photoresist respectively in described a plurality of grid cells, and to form the filter unit that a plurality of intervals arrange, described a plurality of filter units form optical filtering portion 254.Wherein, light shielding part 252 and optical filtering portion 254 all belong to light shield layer.
To grid cell, namely the zone that is not covered by photoresist applies photoresist, just can obtain a plurality of filter units after it is solidified, thereby form optical filtering portion 254.Photoresist is rgb light resistance material, according to the three primary colors principle, after the light mixing through different filter units, can obtain the light of other multiple colors.Because filter unit is positioned at grid cell, gridline separates a plurality of filter units separately.
See also Figure 12, among embodiment, above-mentioned steps S170 is specially therein:
Step S172, a side that is provided with conducting bridge 236 at impression glue-line 220 applies the photoresist of black dyes and makes its curing, forms the black photoresist layer.
Step S174 adopts exposure-developing technique that described black photoresist layer is etched into lattice-shaped structure, obtains described light shielding part 252, and described light shielding part 252 comprises a plurality of grid cells.
Photoresist can be removed by exposure-development.Therefore, can carry out etching to the black photoresist layer by exposure-development, the zone (being used to form the part of filter unit) of grid cell correspondence is removed, form many lattice-shapeds that gridline intersects to form mutually, thereby obtain light shielding part 252.
See also Figure 13, in embodiment one, above-mentioned steps S150 is specially:
Step S152 forms insulation course 240 at the surface coating impression glue that is filled with conductive material at described impression glue-line 220; The impression glue that is coated with in the present embodiment is transparent UV glue.
Step S154 impresses described insulation course 240, forms bridge part 2362 grooves and runs through portion's 2364 grooves, describedly runs through that portion's 2364 grooves penetrate described insulation course 240 and to being positioned at the described second conductive pattern unit 234;
Particularly, use the impression block impression corresponding with required bridging structure on insulation course 240 surfaces and be cured, carry out contraposition and handle, make the protuberance at mould place of corresponding bridging two ends conducting block press to wear insulation course 240 and be connected with the corresponding second conductive pattern unit 234 and form bridge part 2362 grooves and to run through portion's 2364 grooves.
Step S156, the filled conductive material is in bridge part 2362 grooves and run through portion's 2364 grooves and it is solidified, and forms the conducting bridge 236 that has bridge part 2362 and be positioned at the portion of running through 2364 at described bridge part 2362 two ends.
The conductive material of filling can be metal simple-substance or alloy, carbon nano-tube, Graphene, organic conductive macromolecule and ITO; Be preferably metal, as nanometer silver paste.
See also Figure 14, in embodiment two, above-mentioned steps S150 is specially:
Step S211, the surface coating photoresist that is filled with conductive material at described impression glue-line 220 forms photoresist layer.
Step S213 adopts exposure-developing technique that photoresist layer is carried out etching, covers layer to obtain photoresist, and described photoresist is covered layer to being positioned at the described second conductive pattern unit 234; Namely this photoresist is covered layer and is run through portion 2364 corresponding positions two of follow-up conducting bridge 236.
Step S215 covers the impression glue-line 220 surface coating impression glue of layer to having photoresist, forms insulation course 240; In the present embodiment, selected impression glue is transparent UV glue.
Step S217 impresses described insulation course 240, forms bridge part 2362 grooves, and the two ends of described bridge part 2362 grooves and photoresist are covered and layer be connected.
Use the impression block impression corresponding with required conducting bridge 236 on insulation course 240 surfaces and be cured, obtain forming bridge part 2362 grooves, and carry out contraposition and handle, make two ends and the photoresist of bridge part 2362 grooves of conducting bridge 236 cover and layer be connected.
Step S218 removes described photoresist and covers layer, forms to be communicated with the second corresponding conductive pattern unit 234 and the portion of running through 2364 grooves of bridge part 2362 grooves.
Step S219, the filled conductive material is in bridge part 2362 grooves and run through portion's 2364 grooves and it is solidified, and forms the conducting bridge 236 that has bridge part 2362 and be positioned at the portion of running through 2364 at described bridge part 2362 two ends.
The conductive material of filling can be metal simple-substance or alloy, carbon nano-tube, Graphene, organic conductive macromolecule and ITO; Be preferably metal, as nanometer silver paste.
See also Figure 15, in embodiment three, above-mentioned steps S150 is specially:
Step S312 adopts inkjet printing or screen printing technique to prepare conducting bridge 236 zones at needs and covers transparent insulation course 240.
Step S314 adopts inkjet printing or screen printing technique to cover electrically conducting transparent printing ink on the surface that is formed with insulation course 240, forms conducting bridge 236, is positioned at two second conductive pattern unit 234 of same described first conductive pattern 232 relative both sides with electrical connection.Electrically conducting transparent ink material is electrically conducting transparent macromolecular material or nano level metal particle, and it is transparent to solidify after-vision.
By above-mentioned filtering assembly preparation method, can obtain a kind of optical filter box 200, this optical filter box 200 can be realized touch control operation and filtering functions simultaneously.As the combination of indispensable two assemblies in the display screen, when this optical filter box 200 is used for touch display screen, can directly make display screen have touch controllable function, need not to assemble a touch-screen at display screen again, thereby be conducive to reduce the thickness of electronic product.By conducting bridge 236 electrical connection of a plurality of second conductive units of second conductive pattern is got up, an electrical leads only need be set in follow-up be used for drawing second conductive pattern, save operation, guarantee the product yield.The preparation technology of this optical filter box is simple simultaneously, operates controlledly, and cost is lower, applicable to suitability for industrialized production.In addition, when utilizing optical filter box 200 preparation touch display screens, can reduce attaching process one time, thus but economical with materials and enhancing productivity also.
In addition, above-mentioned optical filter box and touch display screen also have following advantage:
(1) optical filter box can be realized touch control operation and optical filter function simultaneously, as an indispensable assembly in the display screen, when being used for display screen, can directly make display screen have touch controllable function, need not to assemble touch-screen at display screen again, not only be conducive to reduce the thickness of electronic product, also saved material and assembly cost simultaneously greatly.
(2) owing to conductive thread a arranges over against hiding gridline, so the user can not see conductive grid in use.
(3) material selected for use of conductive pattern only expands all suitable conductive materials to transparent material by tradition, when conductive pattern is selected metal material for use, can reduce resistance greatly to reduce the energy consumption of touch-screen.
(4) above-mentioned conductive pattern adopts the metal grill structure, adopt imprint process to make, compared to the technology of traditional ITO film as conductive layer 230, mesh shape can one step forming, technology is simple, do not need expensive device such as sputter, evaporation, the yield height is fit to large tracts of land, production in enormous quantities.And if with metal replacement ITO, material cost reduces greatly, owing to do not need to use etching technics, can not cause the waste of conductive layer 230 materials, and environmentally friendly.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (13)
1. an optical filter box comprises substrate, it is characterized in that, also comprises:
The impression glue-line covers the side in described substrate, and described impression glue-line is formed with first groove and second groove away from a side of described substrate;
Conductive layer, be embedded at described impression glue-line away from a side of described substrate, comprise first conductive pattern and at least two second conductive pattern unit, described at least two second conductive pattern unit are positioned at the relative both sides of described first conductive pattern, described first conductive pattern and the described second conductive pattern unit include the conductive grid that is intersected to form mutually by conductive thread, conductive thread intersects to form grid node, described conductive grid comprises a plurality of grid cells, described first conductive pattern and space, the described second conductive pattern unit form induction structure, the conductive thread of described first conductive pattern is contained in described first groove, and the conductive thread of the described second conductive pattern unit is contained in described second groove; And
Be located at the conducting bridge of described impression glue-line, two second conductive pattern unit that are positioned at the relative both sides of same described first conductive pattern are electrically connected by described conducting bridge, described conducting bridge stride across described first conductive pattern and and described first conductive pattern between be provided with insulation course, the described second conductive pattern unit at described conducting bridge and conducting bridge two ends constitutes second conductive pattern;
Filter layer, cover a side that is provided with conductive layer in described impression glue-line, described filter layer comprises light shielding part and optical filtering portion, described light shielding part is lattice-shaped, comprise some cross one another gridlines and a plurality of grid cell, described optical filtering portion comprises a plurality of filter units, and each described filter unit is contained in a described grid cell accordingly.
2. optical filter box according to claim 1 is characterized in that, the projection of conductive thread on described filter layer of the conductive thread of described first conductive pattern and the second conductive pattern unit all is positioned at described gridline.
3. optical filter box according to claim 1 is characterized in that, the width of described conductive thread is between 0.2 to 5 micron, and the distance between the adjacent described grid node is between 10 to 500 microns.
4. optical filter box according to claim 1, it is characterized in that, described conducting bridge is embedded at described insulation course away from a side of described impression glue-line, described insulation course covers described first conductive pattern and the second conductive pattern unit, described conducting bridge comprises bridge part and is arranged at the portion of running through at described bridge part two ends respectively, and described insulation course is run through to be electrically connected adjacent respectively and to be positioned at two second conductive pattern unit of the relative both sides of described first conductive pattern in the described portion of running through.
5. optical filter box according to claim 4 is characterized in that, each described portion of running through is connected at least two conductive threads of the corresponding second conductive pattern unit.
6. optical filter box according to claim 1, it is characterized in that, described conducting bridge is the electrically conducting transparent bridge, and described conducting bridge covers in described surface of insulating layer, and is electrically connected with two second conductive pattern unit that are positioned at the relative both sides of same described first conductive pattern.
7. optical filter box according to claim 1 is characterized in that, the thickness of described optical filtering portion is not less than the thickness of described light shielding part.
8. optical filter box according to claim 1 is characterized in that, the live width of the conductive thread of the conductive thread of described first conductive pattern and the second conductive pattern unit is all less than the live width of described gridline.
9. optical filter box according to claim 1, it is characterized in that, one of them person's grid cell and described filter unit similar fitgures each other in described first conductive pattern and the described second conductive pattern unit, the center line of the conductive thread of at least one conductive pattern is in the projection of described filter layer and the central lines of described gridline in described first conductive pattern and the described second conductive pattern unit.
10. optical filter box according to claim 1 is characterized in that, comprises filling and leading up layer, covers a side that is provided with conductive layer in described impression glue-line, and the described layer of filling and leading up is between described conductive layer and described filter layer.
11. optical filter box according to claim 1, it is characterized in that, the conductive thread of described first conductive pattern and the second conductive pattern unit is respectively to be solidify to form by the conductive material that is filled in described first groove and second groove, and described conductive material comprises at least a in metal, carbon nano-tube, Graphene, tin indium oxide and the conducting polymer.
12. optical filter box according to claim 1 is characterized in that, holds a described filter unit in the scope of each described grid cell of described first conductive pattern and the described second conductive pattern unit at least.
13. a touch display screen is characterized in that, comprises the TFT electrode, Liquid Crystal Module, optical filter box and the polaroid that stack gradually, described optical filter box is the optical filter box described in claim 1 to 12.
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Effective date of registration: 20170630 Address after: 330000 Jiangxi city of Nanchang province Huangjiahu road Nanchang economic and Technological Development Zone Patentee after: Nanchang OFilm Tech. Co.,Ltd. Address before: North to the East, 330013 in Jiangxi province Nanchang city Nanchang economic and technological development zones clove road Longtan ditch Co-patentee before: Shenzhen OFilm Tech Co.,Ltd. Patentee before: Nanchang Ofilm Display Tech Co.,Ltd. Co-patentee before: Suzhou OFilm Tech. Co.,Ltd. |
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Effective date of registration: 20210224 Address after: 231323 Building 1, precision electronics industrial park, Hangbu Town, Shucheng County, Lu'an City, Anhui Province Patentee after: Anhui jingzhuo optical display technology Co.,Ltd. Address before: 330000 Huang Jia Hu Road, Nanchang economic and Technological Development Zone, Nanchang, Jiangxi Patentee before: Nanchang OFilm Tech. Co.,Ltd. |
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