Content of the invention
Based on this it is necessary to for the larger and relatively costly problem of thickness, provide one kind to advantageously reduce electronic productThe optical filter box of thickness and production cost and the touch display screen using this optical filter box.
A kind of optical filter box, including substrate, also includes：
First impressing glue-line, covers the surface in described substrate, and described first impressing glue-line offers the first groove；
First conductive layer, is embedded at described first impressing glue-line, including multiple spaced first conductive patterns, describedFirst conductive pattern includes the first conductive grid, and described first conductive grid is intersected to form by the first conductive thread, and first is conductiveSilk thread intersects to form grid node, and described first conductive thread is contained in described first groove；
Filter layer, covers and imprints glue-line and the first conductive layer side away from described substrate in described first, including shadingPortion and multiple filter unit, described light shielding part is in lattice-shaped, including cross one another gridline, is split by described gridlineSpace forms some grid cells, and each filter unit is contained in a corresponding grid cell, the plurality of filter unit shapeBecome optical filtering portion；
Second impressing glue-line, is located at the same side of described substrate and covers in described filter layer with the described first impressing glue-lineAway from the side of described substrate, described second impressing glue-line offers the second groove；
Second conductive layer, is embedded at described second impressing glue-line, including multiple spaced second conductive patterns, describedSecond conductive pattern includes the second conductive grid, and described second conductive grid is intersected to form by the second conductive thread, and second is conductiveSilk thread intersects to form grid node, and described second conductive thread is contained in described second groove；
Wherein, in described first conductive thread and the second conductive thread, the live width of one of which is 0.2 μm～5 μm, anotherPerson fully falls on described gridline in the projection of described filter layer.
Wherein in an embodiment, the live width of described first conductive thread is 0.2 μm～5 μm, described second conductive filamentLine fully falls on described gridline in the projection of described filter layer.
Wherein in an embodiment, the distance of the two neighboring grid node of described first conductive layer is 50 μm～800 μm,The live width of described second conductive thread is not more than the live width of described gridline.
Wherein in an embodiment, described first conductive thread all falls within described grid in the projection of described filter layerLine.
Wherein in an embodiment, the thickness in described optical filtering portion is not less than the thickness of described light shielding part.
Wherein in an embodiment, described light shielding part is that the photoresist with black dyes imprints glue-line described firstThe lattice-shaped structure of upper formation.
Wherein in an embodiment, the interval width of two neighboring first conductive pattern of described first conductive layer is0.5 μm～50 μm, the interval width of two neighboring second conductive pattern of described second conductive layer is the width of a filter unit.
Wherein in an embodiment, the throwing on described filter layer of every one first conductive grid of described first conductive layerShadow accommodates at least one filter unit, the projection on described filter layer of every one second conductive grid of described second conductive layerAccommodate at least one filter unit.
Wherein in an embodiment, the filter unit number of the projection receiving in described filter layer for described first conductive gridAmount is not more than the filter unit quantity of the projection receiving in described filter layer for described second conductive grid.
A kind of touch display screen, including the TFT electrode stacking gradually, Liquid Crystal Module, public electrode, optical filter box and partiallyMating plate, described optical filter box is above-described optical filter box.
Above-mentioned optical filter box and the touch display screen using this optical filter box, optical filter box can realize touch-control simultaneouslyOperation and filtering functions, as the combination of two assemblies indispensable in display screen, for, when in display screen, can directly make to showDisplay screen has touch controllable function, need not assemble a touch-screen more on a display screen, not only contributes to reduce the thickness of electronic product, withWhen also greatly save material and assembly cost.
Specific embodiment
Understandable for enabling the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present inventionSpecific embodiment be described in detail.Elaborate a lot of details in order to fully understand this in the following descriptionBright.But the present invention can be much to implement different from alternate manner described here, and those skilled in the art can be notSimilar improvement is done, therefore the present invention is not embodied as being limited by following public in the case of running counter to intension of the present invention.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another elementOr can also there is element placed in the middle.When an element is considered as " connection " another element, it can be directly connected toTo another element or may be simultaneously present centering elements.
Unless otherwise defined, all of technology used herein and scientific terminology and the technical field belonging to the present inventionThe implication that technical staff is generally understood that is identical.The term being used in the description of the invention herein is intended merely to description toolThe purpose of the embodiment of body is it is not intended that in limiting the present invention.Term as used herein " and/or " include one or more phasesThe arbitrary and all of combination of the Listed Items closing.
Refer to Fig. 1, be the touch display screen 100 of an embodiment, including the down polaroid 10 stacking gradually, TFT electricityPole 20, Liquid Crystal Module 30, public electrode 40, diaphragm 50, optical filter box 200 and upper polaroid 60.In other embodimentsIn, diaphragm 50 need not be set and also may be used.
TFT electrode 20 includes glass-base 24 and the show electrode 22 being arranged on glass-base 24.Liquid Crystal Module includesLiquid crystal 32 and the alignment film 34 being held on liquid crystal 32 both sides.
It is appreciated that when backlight being used as polarized light source, such as OLED polarized light source, without down polaroid 10, onlyNeed upper polaroid 60.The down polaroid 10 of the present embodiment, TFT electrode 20, Liquid Crystal Module 30, public electrode 40, protectionFilm 50, the structure of upper polaroid 60 and function can be identical with existing product, will not be described here.
Optical filter box 200 have simultaneously tangible operation and can filtering functions, make touch display screen 100 have touch aobviousShow function.Touch display screen can be the LCDs of straight-down negative or side entering type light source.
Refer to Fig. 2 to Fig. 5, expression is 200 4 different embodiments of optical filter box.In aforementioned four embodimentOptical filter box 200 all include substrate 210, first impressing glue-line 220, the first conductive layer 230, filter layer 240, second impressingGlue-line 250 and the second conductive layer 260.The material of substrate 210 can be sillico aluminate glass and calcium soda-lime glass, at PlasmaAfter reason, surface has good cohesive force.General, the thickness range of substrate 210 can be 0.1mm～0.5mm.
First impressing glue-line 220 covers a surface in substrate 210, and the first impressing glue-line 220 is away from the one of substrate 210Side offers the first groove 222.First groove 222 is the groove of mesh shape, and mesh shape can be preset to institute as neededNeed figure.First conductive layer 230 is embedded at the first impressing glue-line 220, and including multiple first conductive patterns 232, multiple first leadIt is provided with interval, so that multiple first conductive pattern 232 insulate between electrical pattern 232.First conductive pattern 232 includes some first leadsPower grid, the first conductive grid is intersected to form by the first conductive thread 2322, and the first conductive thread 2322 intersects to form grid sectionPoint, described first conductive thread 2322 is contained in described first groove 222.In other embodiments, can also be in the first pressurePrint glue-line 220 offers the first groove 222 near the side of substrate 210.
Filter layer 240 covers and imprints glue-line 220 and the first conductive layer 230 side away from substrate 210 in first, including screeningLight portion 242 and multiple filter unit.Light shielding part 242 is in lattice-shaped, including some cross one another gridlines.Divided by gridlineThe space cut forms some grid cells, and each filter unit is contained in a corresponding grid cell, multiple filter unit shapesBecome optical filtering portion 244.
Second impressing glue-line 250 and the first impressing glue-line 220 are positioned at the same side of substrate 210, and cover in filter layer 240Side away from substrate 210.Second impressing glue-line 250 offers the second groove 252 away from the side of substrate 210.Second groove252 is the groove of mesh shape, and mesh shape can be preset to required figure as needed.Second conductive layer 260 is embedded atTwo impressing glue-lines 250, including multiple second conductive patterns 262.It is provided with interval between multiple second conductive patterns 262, so that multipleSecond conductive pattern 262 mutually insulated.Second conductive pattern 262 includes some second conductive grids, and the second conductive grid is byTwo conductive threads 2622 intersect to form, and the second conductive thread 2622 intersects to form grid node, and the second conductive thread 2622 housesIn the second groove 252.Specific in the present embodiment, the first conductive thread 2322 and the second conductive thread 2622 are by conductive materialIt solidify to form.In other embodiments, second can also be offered in the second impressing glue-line 250 near the side of substrate 210Groove 252.
Wherein, in the first conductive thread 2322 and the second conductive thread 2622, the live width of one of which is 0.2 μm～5 μm,Another one fully falls on gridline in the projection of filter layer 240.
As shown in figure 5, represent is that the second conductive thread 2622 fully falls on gridline in the projection of filter layer 240,The live width of the second conductive thread 2622 is equal to the live width of gridline, and the live width of the first conductive thread 2322 is 0.2 μm～5 μm.?In other embodiments, as shown in figure 4, the live width of the second conductive thread 2622 can also be equal to the live width of gridline.Work as optical filteringWhen piece assembly 200 is applied to product, be generally substrate 210 towards user, filter layer 240 is away from client, so being embeddedThe first conductive layer 230 in the first impressing glue-line 220 is easier to be seen by user's naked eyes and affects Consumer's Experience sense.So byTwo conductive threads 2622 fall into gridline and without departing from gridline in the projection of filter layer 240.The line of the first conductive thread 2322A width of 0.2 μm～5 μm, make visually-clear, be conducive to improving Consumer's Experience sense.In other examples, can also be byThe projection that one conductive thread 2322 is arranged in filter layer 240 all falls within gridline, improves Consumer's Experience sense further.
As shown in Fig. 2 represent is that the second conductive thread 2622 live width is 0.2 μm～5 μm, the first conductive thread 2322 existsThe projection of filter layer 240 fully falls on gridline, and the live width of the first conductive thread 2322 is less than the live width of gridline.As Fig. 3Shown, expression is that the second conductive thread 2622 live width is 0.2 μm～5 μm, and the first conductive thread 2322 is in the throwing of filter layer 240Shadow fully falls on gridline, and the live width of the first conductive thread 2322 is equal to the live width of gridline.
Above-mentioned optical filter box 200, the first conductive layer 230 and the second conductive layer 260 interval setting constitute capacitive sensing knotStructure, makes optical filter box 200 can realize touch control operation and filtering functions simultaneously, and need not carry out design of putting up a bridge, and reduces operationDifficulty.When above-mentioned optical filter box 200 is applied to display screen, display screen can be directly made to have touch controllable function, need not be again aobviousDisplay screen over-assemble one touch-screen, not only contributes to reduce the thickness of electronic product, also greatlys save material and assembly cost.WithWhen the first impressing glue-line 220 and the second impressing glue-line 250 be located at the same side of substrate, so the first conductive layer 230 and second is ledInterval between electric layer 260 is less, because electric capacity is inversely proportional to the distance of capacitor plate, so the first conductive layer 230 and secondInductance capacitance between conductive layer 260 increases, and is conducive to increasing the sensitivity of optical filter box 200.When the first conductive threadWhen the live width of 2322 and second one of which in conductive thread 2622 is 0.2 μm～5 μm, visually-clear can be reached, need not be rightQuasi- gridline, reduces fraction defective and production cost；Another one fully falls on gridline in the projection of filter layer 240, becauseLight shielding part 242 has opaqueness, as long as ensureing that the live width of another one is not more than the width of gridline so that it may so that this conductive filamentLine is without departing from gridline, thus not blocking filter layer 240, will not reduce the light transmittance of filter layer 240.
In first conductive layer 230, the distance of two neighboring grid node is 50 μm～800 μm.When the distance of grid node is got overWhen big, the density of conductive grid is less, and now light permeable rate is big, and cost also can be low, but resistance can be larger.When grid nodeDistance more hour, the density of conductive grid is bigger, and resistance is less, but transmitance reduces, and the consumption of conductive material is also got over simultaneouslyGreatly, so that cost is higher.Therefore considering cost, light transmittance and resistance factors, grid node spacing is traditionally arranged to be 50 μm～800 μm.
Refer to Fig. 5 and Fig. 6, specific in the present embodiment, optical filtering portion 244 includes chromatic photoresist, in each grid cellIt is formed with a chromatic photoresist, chromatic photoresist forms filter unit.Chromatic photoresist is that the photoresist with coloured dye is formed, permissibleUsing exposure-development processing procedure.Chromatic photoresist is generally red（Red, R）Photoresistance, green（Green, G）Photoresistance or indigo plant（Blue, B）LightResistance, is used for making incident light be transformed into monochromatic light, realizes filtering functions.Light shielding part is that the photoresist with black dyes is formed atOne impressing glue-line 220, and light shielding part is in lattice-shaped, has opaqueness, can adopt exposure-development processing procedure.Grid in lattice-shapedLattice unit is square so that the photoresistance arrangement in optical filtering portion 244 is more compact and uniform.Light shielding part 242 can be prevented effectively from chromatic photoresistColour contamination each other, and the contrast of R, G, B light can be increased.
Specific in the present embodiment, the material of the first impressing glue-line 220 and the second impressing glue-line 250 is that solvent-free ultraviolet is solidChange acryl resin, thickness is 2 μm～10 μm.First impressing glue-line 220 and the second impressing glue-line 250 are transparence, do not affectOverall transmitance.In other embodiments, the material of the first impressing glue-line 220 and the second impressing glue-line 250 can also beOn Visible Light Cured Resin or heat reactive resin.
The above-mentioned optical filter box with touch controllable function, the first conductive pattern 232 and the second conductive pattern 262 are impressingMode is formed, and comprises the following steps that：
(1) carry out plasma on a surface of substrate 210（Plasma）Process.To remove the dirty of substrate 210 surface, andMake substrate 210 surface ionizing, increase the follow-up cohesive force with the first impressing glue-line 220.
(2) that surface coating impressing glue processing through Plasma in substrate 210, forms the first impressing glue-line.This realityApply example and adopt solvent-free ultra-violet curing acryl resin.And with the impression formboard that is nested with the first conductive pattern 232 firstImpressing glue-line 220 surface is imprinted and is solidified, and obtains the first groove 222 mating with the first conductive pattern 232.
(3) fill conductive material into the first groove 222 and solidify, obtain the first conductive layer 230.Conductive material can beAt least one in metal, CNT, Graphene, organic conductive macromolecule or ITO, forms by the first conductive thread 2322The first conductive grid constituting.It is preferably metal, such as nanometer silver paste.When from metal, it is possible to decrease resistance and reduction touchThe energy consumption of display screen.
(4) cover one layer of light carrying black dyes in the first impressing glue-line 220 and the whole face in the first conductive pattern 232 surfacePhotoresist.
(5) adopt exposure-development technology, the photoresist in filter unit region is removed, form the light shielding part of lattice-shaped242.
(6) plate/coat R/G/B chromatic photoresist in the gradation of filter unit region, form optical filtering portion 244.Optical filtering portion 244 and screeningLight portion 242 forms filter layer 240.
(7) it is coated with impressing glue on filter layer 240 surface, form the second impressing glue-line 250.The present embodiment adopts solvent-free purpleOuter solidification acryl resin.And imprint glue-line 250 surface using the impression block being nested with the second conductive pattern 262 secondImprinted and solidified, obtained the second groove 252 mating with the second conductive pattern 262.
(8) fill conductive material into the second groove 252 and solidify, obtain the second conductive layer 260.Conductive material can beMetal, CNT, Graphene, organic conductive macromolecule or ITO, form second being made up of the second conductive thread 2622 and leadPower grid.It is preferably metal, such as nanometer silver paste.When from metal, it is possible to decrease resistance and the energy consumption reducing touch display screen.Ensure that the live width of one of which in described first conductive thread 2322 and the second conductive thread 2622 is 0.2 μm～5 μm, another oneFully fall on described gridline in the projection of described filter layer 240.
Specific in the present embodiment, the second conductive grid and filter unit similar fitgures each other, the second conductive thread 2622Center line overlap with the center line of described gridline in the projection of filter layer 240, that is, the second conductive thread 2622 be aligned gridLine.Second conductive grid intersects to form for the second conductive thread 2622, and grid cell is formed by gridline segmentation, and the list that filtersUnit is formed at grid cell.So the shape of the second conductive grid and the shape phase of filter unit in the present embodiment, can be madeTogether but of different sizes, that is, the second conductive grid and filter unit similar fitgures each other, ensure that the second conductive thread 2622 exists simultaneouslyThe projection of filter layer 240 is without departing from gridline.Further reduce the probability that the second conductive thread 2622 exposes gridline region.
Specific in the present embodiment, the thickness in optical filtering portion 244 is not less than the thickness of light shielding part 242.Refer to Fig. 5, representBe filter unit thickness be more than gridline thickness.When the thickness in optical filtering portion 244 is more than the thickness of light shielding part 242, fromThe light that optical filtering portion 244 appears, not only can see from front, from side it can be seen that, such that it is able to increase going out of optical filtering portion 244Light rate.Certainly, as shown in figure 4, the thickness in optical filtering portion 244 can also be equal to the thickness of gridline.
Specific in the present embodiment, adjacent first conductive pattern 232 is provided with interval, adjacent the second conductive pattern 262It is provided with interval, with mutually insulated.As shown in figure 8, represent is multiple the first of the first conductive layer 230 as shown in Figure 5 to leadThe interval schematic diagram of electrical pattern 232.As shown in fig. 7, represent is multiple second to lead in the second conductive layer 260 as shown in Figure 5The interval schematic diagram of electrical pattern 262.Specific in the present embodiment, two neighboring first conductive pattern 232 of the first conductive layer 230Interval width be 0.5 μm～50 μm, now can by by conductive thread marginal portion disappearance be separated.Described second is conductiveThe interval width of two neighboring second conductive pattern 262 of layer 260 is the width of a filter unit, now can pass through full line or wholeRow conductive thread lacks, and is separated.In other examples, when the first conductive thread 2322 of the first conductive layer 230When the projection of filter layer 240 all falls within gridline, the first two neighboring conductive pattern 232 of the first conductive layer 230Can also be a filter unit as the interval width of the second two neighboring conductive pattern 262 of the second conductive layer 260Width, as shown in Figure 7.
Refer to Fig. 6, specific in the present embodiment, the first conductive thread 2322 and the second conductive thread 2622 be straight line,Curve or broken line.When first conductive thread 2322 and the second conductive thread 2622 can be different shape, reduce production requirement.
As shown in figure 9, represent is that the second conductive thread 2622 of the second conductive layer 260 as shown in Figure 5 projects to filterDuring photosphere 240, every one second conductive grid accommodates a filter unit.As shown in figure 13, expression is as shown in Figure 5When first conductive thread 2322 of one conductive layer 230 projects to filter layer 240, every one first conductive grid accommodates at least oneFilter unit.Because each grid cell is to there being a conductive grid, so the density of conductive grid is larger, electric conductivityPreferably.
As shown in Figure 10 to Figure 12, expression is that the second conductive thread 2622 of the second conductive layer 260 as shown in Figure 5 is thrownWhen shadow is on filter layer 240, every one second conductive grid accommodates at least two filter unit, can be according to conductive to secondLayer 260 resistance requirement and conductive material coating weight requirement come to determine accommodate filter unit quantity.Three now can be divided intoThe situation of kind, with laterally as X-axis, the direction of vertical transverse is Y-axis.As shown in Figure 10, only in the X-axis direction, the second conductive layer 260Projection on filter layer 240 for every one second conductive grid accommodate at least two filter units.As shown in figure 11, only in Y-axisOn direction, the projection on filter layer 240 of every one second conductive grid of the second conductive layer 260 accommodate at least two filter singleUnit.As shown in figure 12, simultaneously in X-axis and Y direction, every one second conductive grid of the second conductive layer 260 is in filter layer 240On projection accommodate at least two filter units.
As shown in Figure 14 to Figure 16, expression is that the first conductive thread 2322 of the first conductive layer 230 as shown in Figure 5 is thrownWhen shadow is to filter layer 240, every one first conductive grid accommodates at least two filter units, can be according to the first conductive layerThe requirement of 230 resistance requirement and the coating weight of conductive material come to determine accommodate filter unit quantity.Now also can be divided into threeThe situation of kind, with laterally as X-axis, the direction of vertical transverse is Y-axis.As shown in figure 14, only in the X-axis direction, the first conductive layer 230Projection on filter layer 240 for every one first conductive grid accommodate at least two filter units.As shown in figure 15, only in Y-axisOn direction, the projection on filter layer 240 of every one first conductive grid of the first conductive layer 230 accommodate at least two filter singleUnit.As shown in figure 16, simultaneously in X-axis and Y direction, every one first conductive grid of the first conductive layer 230 is in filter layer 240On projection accommodate at least two filter units.
Specific in the present embodiment, described first conductive grid is in the filter unit projecting receiving of described filter layer 240Quantity is not more than the filter unit quantity of the projection receiving in described filter layer 240 for described second conductive grid.Because first leadsThe live width of the first conductive thread 2322 of power grid is 0.2 μm～5 μm, as long as the second conductive thread 2322 of the second conductive gridIt is not more than the live width of gridline.So the live width of the second conductive thread 2622 is larger, resistance is relatively small.So will be describedThe filter unit quantity of the projection receiving in described filter layer 240 for first conductive grid is arranged to no more than described second conductive meshThe filter unit quantity of the projection receiving in described filter layer 240 for the lattice, that is to say that the density of the first conductive grid is led more than secondThe density of power grid, thus reduce the resistance of the first conductive layer 230, it is to avoid the resistance difference of two conductive layers is too big.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneouslyTherefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the artFor, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present inventionShield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.