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 that is conducive to reduce the optical filter box of electronic product thickness and production cost and uses this optical filter box is provided.
A kind of optical filter box comprises substrate, also comprises:
The first impression glue-line covers the surface in described substrate, and the described first impression glue-line offers first groove;
First conductive layer, be embedded at the described first impression glue-line, comprise first conductive pattern that a plurality of intervals arrange, described first conductive pattern comprises first conductive grid, described first conductive grid is intersected to form by first conductive thread, first conductive thread intersects to form grid node, and described first conductive thread is contained in described first groove;
Filter layer, cover in the side of described first impression glue-line and first conductive layer away from described substrate, comprise light shielding part and a plurality of filter unit, described light shielding part is lattice-shaped, comprise cross one another gridline, the space of being cut apart by described gridline forms some grid cells, and each filter unit is contained in the corresponding grid cell, and described a plurality of filter units form optical filtering portion;
The second impression glue-line is positioned at the same side of described substrate and covers in the side of described filter layer away from described substrate with the described first impression glue-line, and the described second impression glue-line offers second groove;
Second conductive layer, be embedded at the described second impression glue-line, comprise second conductive pattern that a plurality of intervals arrange, described second conductive pattern comprises second conductive grid, described second conductive grid is intersected to form by second conductive thread, second conductive thread intersects to form grid node, and described second conductive thread is contained in described second groove;
Wherein, in described first conductive thread and second conductive thread wherein one live width be 0.2 μ m~5 μ m, another person all drops on the described gridline in the projection of described filter layer.
Among embodiment, the live width of described first conductive thread is 0.2 μ m~5 μ m therein, and described second conductive thread all drops on the described gridline in the projection of described filter layer.
Among embodiment, the distance of adjacent two grid nodes of described first conductive layer is 50 μ m~800 μ m therein, and the live width of described second conductive thread is not more than the live width of described gridline.
Among embodiment, described first conductive thread all falls within described gridline in the projection of described filter layer therein.
Therein among embodiment, the thickness of described optical filtering portion is not less than the thickness of described light shielding part.
Therein among embodiment, described light shielding part is to have the lattice-shaped structure that the photoresist of black dyes forms at the described first impression glue-line.
Among embodiment, the interval width of adjacent two first conductive patterns of described first conductive layer is 0.5 μ m~50 μ m therein, and the interval width of adjacent two second conductive patterns of described second conductive layer is the width of a filter unit.
Therein among embodiment, each first conductive grid projection on described filter layer of described first conductive layer accommodates at least one filter unit, and each second conductive grid projection on described filter layer of described second conductive layer accommodates at least one filter unit.
Among embodiment, the filter unit quantity that described first conductive grid holds in the projection of described filter layer is not more than the filter unit quantity that described second conductive grid holds in the projection of described filter layer therein.
A kind of touch display screen comprises the TFT electrode, Liquid Crystal Module, public electrode, optical filter box and the polaroid that stack gradually, and described optical filter box is above-described optical filter box.
Above-mentioned optical filter box and use the touch display screen of this optical filter box, 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.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.A lot of details have been set forth in the following description so that fully understand the present invention.But the present invention can implement much to be different from alternate manner described here, and those skilled in the art can do similar improvement under the situation of intension of the present invention, so the present invention is 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 that belongs to those skilled in the art's common sense of the present invention 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 instructions of the present invention herein.Term as used herein " and/or " comprise one or more relevant Listed Items arbitrarily with all combinations.
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.
TFT electrode 20 comprises glass-base 24 and the show electrode 22 that is arranged on the glass-base 24.Liquid Crystal Module comprises liquid crystal 32 and is held on the alignment film 34 of liquid crystal 32 both sides.
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.
But optical filter box 200 has tangible operation and filtering functions simultaneously, makes touch display screen 100 have the touch Presentation Function.Touch display screen can be the LCDs of straight-down negative or side entering type light source.
See also Fig. 2 to Fig. 5, expression be 200 4 different embodiment of optical filter box.Optical filter box 200 among above-mentioned four embodiment includes substrate 210, the first impression glue-line 220, first conductive layer 230, filter layer 240, second impression glue-line 250 and second conductive layer 260.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.
The first impression glue-line 220 covers a surface in substrate 210, and the first impression glue-line 220 offers first groove 222 away from a side of substrate 210.First groove 222 is the groove of mesh shape, and mesh shape can be preset to required figure as required.First conductive layer 230 is embedded at the first impression glue-line 220, comprises a plurality of first conductive patterns 232, and 232 of a plurality of first conductive patterns are provided with at interval, so that 232 insulation of a plurality of first conductive pattern.First conductive pattern 232 comprises some first conductive grids, and first conductive grid is intersected to form by first conductive thread 2322, and first conductive thread 2322 intersects to form grid node, and described first conductive thread 2322 is contained in described first groove 222.In other embodiments, can also offer first groove 222 in a side of the first impression glue-line, 220 close substrates 210.
Filter layer 240 covers in first impression glue-line 220 and first conductive layer 230 away from a side of substrate 210, comprises light shielding part 242 and a plurality of filter unit.Light shielding part 242 is lattice-shaped, comprises some cross one another gridlines.The space of being cut apart by gridline forms some grid cells, and each filter unit is contained in the corresponding grid cell, and a plurality of filter units form optical filtering portion 244.
The second impression glue-line 250 and the first impression glue-line 220 are positioned at the same side of substrate 210, and cover in the side of filter layer 240 away from substrate 210.The second impression glue-line 250 offers second groove 252 away from a side of substrate 210.Second groove 252 is the groove of mesh shape, and mesh shape can be preset to required figure as required.Second conductive layer 260 is embedded at the second impression glue-line 250, comprises a plurality of second conductive patterns 262.262 of a plurality of second conductive patterns are provided with at interval, so that a plurality of second conductive pattern, 262 mutually insulateds.Second conductive pattern 262 comprises some second conductive grids, and second conductive grid is intersected to form by second conductive thread 2622, and second conductive thread 2622 intersects to form grid node, and second conductive thread 2622 is contained in second groove 252.In present embodiment, first conductive thread 2322 and second conductive thread 2622 solidify to form by conductive material.In other embodiments, can also offer second groove 252 in a side of the second impression glue-line, 250 close substrates 210.
Wherein, in first conductive thread 2322 and second conductive thread 2622 wherein one live width be 0.2 μ m~5 μ m, another person all drops on the gridline in the projection of filter layer 240.
As shown in Figure 5, expression be that second conductive thread 2622 all drops on the gridline in the projection of filter layer 240, the live width of second conductive thread 2622 equals the live width of gridline, the live width of first conductive thread 2322 is 0.2 μ m~5 μ m.In other embodiment, as shown in Figure 4, the live width of second conductive thread 2622 can also equal the live width of gridline.When optical filter box 200 is applied to product, be generally speaking substrate 210 towards the user, filter layer 240 is away from the client, influences user's experience sense so be embedded at first conductive layer, 230 easier being seen by user's naked eyes of the first impression glue-line 220.So the projection of second conductive thread 2622 at filter layer 240 fallen into gridline and do not exceeded gridline.The live width of first conductive thread 2322 is 0.2 μ m~5 μ m, makes visually-clear, is conducive to improve user's experience sense.In other embodiment, the projection that first conductive thread 2322 can also be arranged in filter layer 240 all falls within on the gridline, further improves user's experience sense.
As shown in Figure 2, expression be that second conductive thread, 2622 live widths are 0.2 μ m~5 μ m, first conductive thread 2322 all drops on the gridline in the projection of filter layer 240, the live width of first conductive thread 2322 is less than the live width of gridline.As shown in Figure 3, expression be that second conductive thread, 2622 live widths are 0.2 μ m~5 μ m, first conductive thread 2322 all drops on the gridline in the projection of filter layer 240, the live width of first conductive thread 2322 equals the live width of gridline.
Above-mentioned optical filter box 200, the first conductive layers 230 and second conductive layer 260 arrange at interval and 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.The first impression glue-line 220 and the second impression glue-line 250 are positioned at the same side of substrate simultaneously, so the interval between first conductive layer 230 and second conductive layer 260 is less, because the distance of electric capacity and capacitor plate is inversely proportional to, so the inductance capacitance between first conductive layer 230 and second conductive layer 260 increases, the sensitivity that is conducive to increase optical filter box 200.When wherein one live width is 0.2 μ m~5 μ m in first conductive thread 2322 and second conductive thread 2622, can reach visually-clear, need not the alignment grid ruling, reduced fraction defective and production cost; Another person all drops on the gridline in the projection of filter layer 240, because light shielding part 242 has opaqueness, be not more than the width of gridline as long as guarantee another person's live width, just can make this conductive thread not exceed gridline, thereby can not block filter layer 240, can not reduce the transmittance of filter layer 240.
The distance of adjacent two grid nodes is 50 μ m~800 μ m in first conductive layer 230.When the distance of grid node was more big, the density of conductive grid was more little, and this moment, light permeable rate wanted big, and cost also can be low, but resistance can be bigger.When the distance of grid node more hour, the density of conductive grid is more big, resistance is less, but transmitance reduces, the consumption of conductive material is also more big simultaneously, so that cost is more high.So take all factors into consideration cost, transmittance and resistance factor, the grid node spacing be traditionally arranged to be 50 μ m~800 μ m.
See also Fig. 5 and Fig. 6, in present embodiment, optical filtering portion 244 comprises chromatic photoresist, is formed with a chromatic photoresist in each grid cell, and chromatic photoresist forms filter unit.Chromatic photoresist is that the photoresist that has coloured dye forms, and can adopt exposure-developing manufacture process.That chromatic photoresist 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 is that the photoresist that has a black dyes is formed at the first impression glue-line 220, and light shielding part is lattice-shaped, has opaqueness, can adopt exposure-developing manufacture process.Grid cell is square in the lattice-shaped, makes the photoresistance of optical filtering portion 244 arrange compacter and even.Light shielding part 242 can effectively be avoided chromatic photoresist colour contamination each other, and can increase the contrast of R, G, B light.
In present embodiment, the material of the first impression glue-line 220 and the second impression glue-line 250 is solvent-free ultra-violet curing acrylic resin, and thickness is 2 μ m~10 μ m.The first impression glue-line 220 and the second impression glue-line 250 are transparence, do not influence whole transmitance.In other embodiments, the material of the first impression glue-line 220 and the second impression glue-line 250 can also be visible-light curing resin or heat reactive resin.
The above-mentioned optical filter box that has touch controllable function, first conductive pattern 232 and second conductive pattern 262 are the impression mode and form, and concrete steps are as follows:
(1) carrying out plasma (Plasma) on a surface of substrate 210 handles.Removing the dirty of substrate 210 surfaces, and make substrate 210 surface ionizations, increase cohesive force follow-up and the first impression glue-line 220.
(2) impress glue at substrate 210 through that surface coating that Plasma handles, form the first impression glue-line.Present embodiment adopts solvent-free ultra-violet curing acrylic resin.And use the impression formboard that is nested with first conductive pattern 232 to impress on the first impression glue-line, 220 surfaces and solidify, obtain first groove 222 with first conductive pattern, 232 couplings.
(3) to 222 interior filled conductive materials and the curing of first groove, obtain first conductive layer 230.Conductive material can be among metal, carbon nano-tube, Graphene, organic conductive macromolecule or the ITO at least a, form first conductive grid that is constituted by first conductive thread 2322.Be preferably metal, as nanometer silver paste.When selecting metal for use, the energy consumption that can reduce resistance and reduce touch display screen.
(4) cover the photoresist that one deck has black dyes at the first impression glue-line 220 and first conductive pattern, 232 surperficial whole faces.
(5) adopt exposure-developing technique, the photoresist in filter unit zone is removed, form the light shielding part 242 of lattice-shaped.
(6) plate/coat the R/G/B chromatic photoresist in filter unit zone gradation, form optical filtering portion 244.Optical filtering portion 244 and light shielding part 242 form filter layer 240.
(7) at filter layer 240 surface coating impression glue, form the second impression glue-line 250.Present embodiment adopts solvent-free ultra-violet curing acrylic resin.And use the impression block that is nested with second conductive pattern 262 to impress on the second impression glue-line, 250 surfaces and solidify, obtain second groove 252 that mates with second conductive pattern 262.
(8) to 252 interior filled conductive materials and the curing of second groove, obtain second conductive layer 260.Conductive material can be metal, carbon nano-tube, Graphene, organic conductive macromolecule or ITO, forms second conductive grid that is made of second conductive thread 2622.Be preferably metal, as nanometer silver paste.When selecting metal for use, the energy consumption that can reduce resistance and reduce touch display screen.Guarantee in described first conductive thread 2322 and second conductive thread 2622 that wherein one live width is 0.2 μ m~5 μ m, another person all drops on the described gridline in the projection of described filter layer 240.
In present embodiment, second conductive grid and filter unit be similar fitgures each other, and the center line of second conductive thread 2622 is in the projection of filter layer 240 and the central lines of described gridline, i.e. second conductive thread, 2622 alignment grid rulings.Second conductive grid is that second conductive thread 2622 intersects to form, 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 second conductive grid is identical with the shape of filter unit but vary in size, namely second conductive grid and filter unit similar fitgures each other guarantee that simultaneously second conductive thread 2622 does not exceed gridline in the projection of filter layer 240.Further reduce second conductive thread 2622 and exposed the probability in gridline zone.
In present embodiment, the thickness of optical filtering portion 244 is not less than the thickness of light shielding part 242.See also Fig. 5, expression be that the thickness of filter unit is greater than the thickness of gridline.When the thickness of optical filtering portion 244 during greater than the thickness of light shielding part 242, from the light that optical filtering portion 244 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 244.Certainly, as shown in Figure 4, the thickness of optical filtering portion 244 also can equal the thickness of gridline.
In present embodiment, adjacent first conductive pattern 232 is provided with at interval, and the second adjacent conductive pattern 262 is provided with at interval, with mutually insulated.As shown in Figure 8, expression is the interval synoptic diagram of a plurality of first conductive patterns 232 of first conductive layer 230 as shown in Figure 5.As shown in Figure 7, expression is the interval synoptic diagram of a plurality of second conductive patterns 262 in as shown in Figure 5 second conductive layer 260.In present embodiment, the interval width of adjacent two first conductive patterns 232 of first conductive layer 230 is 0.5 μ m~50 μ m, and this moment can be by cutting off conductive thread marginal portion disappearance.The interval width of adjacent two second conductive patterns 262 of described second conductive layer 260 is the width of a filter unit, and can cut off this moment by full line or permutation conductive thread disappearance.In other embodiment, when first conductive thread 2322 of first conductive layer 230 when the projection of filter layer 240 all falls within on the gridline, first adjacent two conductive pattern 232 of first conductive layer 230 also can be the same with the interval width of second adjacent two conductive pattern 262 of second conductive layer 260, be the width of a filter unit, as shown in Figure 7.
See also Fig. 6, in present embodiment, first conductive thread 2322 and second conductive thread 2622 are straight line, curve or broken line.When first conductive thread 2322 and second conductive thread 2622 can be for difformities, reduced production requirement.
As shown in Figure 9, expression be second conductive thread 2622 of second conductive layer 260 as shown in Figure 5 when projecting to filter layer 240, each second conductive grid accommodates a filter unit.As shown in figure 13, expression be first conductive thread 2322 of first conductive layer 230 as shown in Figure 5 when projecting to filter layer 240, each first conductive grid accommodates at least one filter unit.Because each grid cell is to there being a conductive grid, so the density of conductive grid is bigger, electric conductivity is better.
Extremely shown in Figure 12 as Figure 10, expression be that second conductive thread 2622 of second conductive layer 260 as shown in Figure 5 is when projecting on the filter layer 240, each second conductive grid accommodates at least two filter unit, can be according to the resistance of second conductive layer 260 being required and the requirement of the coating weight of conductive material decides the filter unit quantity of holding.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 10, only on X-direction, at least two filter units are held in each second conductive grid projection on filter layer 240 of second conductive layer 260.As shown in figure 11, only on Y direction, at least two filter units are held in each second conductive grid projection on filter layer 240 of second conductive layer 260.As shown in figure 12, on X-axis and Y direction, at least two filter units are held in each second conductive grid projection on filter layer 240 of second conductive layer 260 simultaneously.
Extremely shown in Figure 16 as Figure 14, expression be that first conductive thread 2322 of first conductive layer 230 as shown in Figure 5 is when projecting to filter layer 240, each first conductive grid accommodates at least two filter units, can be according to the resistance of first conductive layer 230 being required and the requirement of the coating weight of conductive material decides the filter unit quantity of holding.Also 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 14, only on X-direction, at least two filter units are held in each first conductive grid projection on filter layer 240 of first conductive layer 230.As shown in figure 15, only on Y direction, at least two filter units are held in each first conductive grid projection on filter layer 240 of first conductive layer 230.As shown in figure 16, on X-axis and Y direction, at least two filter units are held in each first conductive grid projection on filter layer 240 of first conductive layer 230 simultaneously.
In present embodiment, the filter unit quantity that described first conductive grid holds in the projection of described filter layer 240 is not more than the filter unit quantity that described second conductive grid holds in the projection of described filter layer 240.Because the live width of first conductive thread 2322 of first conductive grid is 0.2 μ m~5 μ m, as long as second conductive thread 2322 of second conductive grid is not more than the live width of gridline.So the live width of second conductive thread 2622 is bigger, resistance is less relatively.So the filter unit quantity that described first conductive grid holds in the projection of described filter layer 240 is arranged to be not more than the filter unit quantity that described second conductive grid holds in the projection of described filter layer 240, that is to say that the density of first conductive grid is greater than the density of second conductive grid, thereby reduce the resistance of first conductive layer 230, avoid the resistance difference of two conductive layers too big.
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.