CN103345332A - Optical filter box and touch display screen using optical filter box - Google Patents

Abstract

An optical filter box comprises a substrate, a filtering layer and a conducting layer. The filtering layer is arranged on one side of the substrate in a covering mode and comprises a shading portion and a plurality of filtering units, the shading portion is in a grid shape and comprises grid lines which are mutually intersected, a first groove and a second groove are formed in one side, far from the substrate, of the shading portion, spaces divided by the grid lines form a plurality of grid units, and each filtering unit is accommodated in one corresponding grid unit so as to form a filtering portion. The conducting layer is arranged in the shading portion in an embedded mode and comprises first conducting patterns and second conducting patterns, the first conducting patterns and the second conducting patterns are arranged at intervals in the plane extension direction of the filtering layer to form a sensing structure, the first conducting patterns and the second conducting patterns comprise conducting grids formed by conducting wires, and the wire width of the conducting grids of the first conducting patterns and the conducting wires of the second conducting patterns is not more than the wire width of the grid lines. The optical filter box can achieve touch operation and filtering, is beneficial to reducing the thickness of electronic equipment, and saves materials and assembly cost. The invention further provides a touch display screen.

Description

Optical filter box and use the touch display screen of this optical filter box

Technical field

The present invention relates to the touching technique field, particularly relate to a kind of optical filter box and use the touch display screen of this optical filter box.

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 polaroid, optical filter box, diaphragm, Liquid Crystal Module and thin film transistor (TFT) (TFT; Thin Film Transistor); when being combined into display screen by polaroid, optical filter box, diaphragm, Liquid Crystal Module and thin film transistor (TFT); 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 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:

Filter layer, cover the side in described substrate, comprise light shielding part and a plurality of filter unit, described light shielding part is lattice-shaped, comprise cross one another gridline, described light shielding part offers first groove and second groove away from a side of substrate, and the space of being cut apart by described gridline forms some grid cells, each described filter unit is contained in a described grid cell accordingly, forms optical filtering portion;

Conductive layer, be embedded at described light shielding part, described conductive layer comprises first conductive pattern and second conductive pattern, described first conductive pattern and second conductive pattern are in the plane of described filter layer extension direction space, described first conductive pattern and the second conductive pattern space form induction structure, described first conductive pattern and described second conductive pattern include the some conductive grids that are made of conductive thread, the adjacent conductive silk thread intersects to form grid node, the conductive thread of described first conductive pattern is contained in described first groove, the conductive thread of described second conductive pattern is contained in described second groove, and the live width of the conductive thread of described first conductive pattern and second conductive pattern is not more than the live width of described gridline.

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 conductive grid of at least one conductive pattern and described filter unit similar fitgures each other in described first conductive pattern and described second conductive pattern, the center line of the conductive thread of at least one conductive pattern and the central lines of described gridline in described first conductive pattern and described second conductive pattern.

Therein among embodiment, described light shielding part is that the photoresist that has a black dyes forms lattice-shaped at described substrate and constitutes.

Among embodiment, the degree of depth of described first groove and second groove is less than the thickness of described light shielding part therein.

Among embodiment, adjacent described first conductive pattern and the interval width between second conductive pattern are 0.5 μ m～50 μ m therein.

Therein among embodiment, the range content of each described conductive grid of described first conductive pattern and described second conductive pattern has been received at least one described filter unit.

A kind of touch display screen comprises the TFT electrode, Liquid Crystal Module, 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 using in 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.

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 again the structural representation of the optical filter box of an embodiment;

Fig. 5 is the structural representation at another visual angle of optical filter box shown in Figure 4;

Fig. 6 is in the conductive layer of an embodiment between first conductive pattern, the interval synoptic diagram between first conductive pattern and second conductive pattern;

Fig. 7 is in the conductive layer of another embodiment between first conductive pattern, the interval synoptic diagram between first conductive pattern and second conductive pattern;

Fig. 8 holds the structural representation of a filter unit for conductive grid;

Fig. 9～11 hold the structural representation of at least two filter units for conductive grid.

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.

The present invention proposes to be conducive to reduce the optical filter box of electronic product thickness and production cost and the touch display screen of this optical filter of use.This optical filter box can be realized touch operation and Presentation Function, thereby makes touch display screen have the touch Presentation Function.

Seeing also Fig. 1, is thetouch display screen 100 of an embodiment, comprises followingpolaroid 10, TFT electrode 20, Liquid CrystalModule 30,public electrode 40,diaphragm 50, theoptical filter box 200 that stacks gradually and goes up polaroid 60.In other embodiment, need not to arrangediaphragm 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 comprisesliquid crystal 32 and is held on thealignment film 34 ofliquid crystal 32 both sides.

Be appreciated that when using backlight as polarized light source as the OLED polarized light source, need not downpolaroid 10, only needing upward,polaroid 60 gets final product.Structure and the function of the followingpolaroid 10 of present embodiment, TFT electrode 20, Liquid CrystalModule 30,public electrode 40,diaphragm 50,last polaroid 60 can be identical with existing product, do not repeat them here.In other embodiment, alsodiaphragm 50 can be set.

But buttouch display screen 100 has touch control operation and filtering functions simultaneously, makes display screen have touch display function.Display screen can be the LCDs of straight-down negative or side entering type light source.

See also Fig. 2 to Fig. 4, expression be three kinds of different embodiments of optical filter box 200.Optical filter box 200 in above-mentioned three kinds of different embodiments includessubstrate 210,filter layer 220 and conductive layer 230.The material ofsubstrate 210 can be sillico aluminate glass and calcium soda-lime glass, has good cohesive force through the plasma treatment rear surface.General, the thickness range ofsubstrate 210 can be 0.1mm～0.5mm.

Filter layer 220 covers the side in substrate 210.Filter layer 220 compriseslight shielding part 222 and a plurality of filter unit, and a plurality of filter units form optical filtering portion 224.Light shielding part 222 is lattice-shaped, comprises some cross one another gridlines.Light shielding part 222 has opaqueness.Light shielding part 222 offersfirst groove 2222 andsecond groove 2224 away from a side of substrate 210.First groove 2222 andsecond groove 2224 are the groove of mesh shape, and mesh shape can be preset to required figure as required.The space of being cut apart by gridline forms some grid cells, and each described filter unit is contained in a described grid cell accordingly, formsoptical filtering portion 224.

Conductive layer 230 is embedded at light shielding part 222.Conductive layer 230 comprises firstconductive pattern 232 and second conductive pattern 234.Firstconductive pattern 232 and secondconductive pattern 234 are in the plane offilter layer 220 extension direction space, and firstconductive pattern 232 and second conductive pattern, 234 spaces form the capacitive sensing structure.Firstconductive pattern 232 and secondconductive pattern 234 include the some conductive grids that are made ofconductive thread 240, and adjacentconductive silk thread 240 intersects to form grid node.Theconductive thread 240 that theconductive thread 240 of firstconductive pattern 232 is contained in first groove, 2222, the secondconductive patterns 234 is contained in described second groove 2224.The live width of theconductive thread 240 of firstconductive pattern 232 and secondconductive pattern 234 is not more than the live width of described gridline.As shown in Figure 2, expression is the live width of theconductive thread 240 of firstconductive pattern 232 and secondconductive pattern 234optical filter box 200 when equaling the width of gridline.As shown in Figure 3 and Figure 4, expression is the live width ofconductive thread 240 of firstconductive pattern 232 and secondconductive pattern 234optical filter box 200 during less than the width of gridline.The live width ofconductive thread 240 is not more than the width of gridline, make in the groove of the embeddinglight shielding part 222 thatconductive thread 240 is complete, and can not drop on the filter unit zone because of partiallyconductive silk thread 240, avoid when the chromatic photoresist of processing procedure filter unit, being removed and produce the risk of broken string, simultaneously can avoid influencing the light emission rate of filter unit, improve user's experience sense.

Above-mentionedoptical filter box 200, the firstconductive patterns 232 and secondconductive pattern 234 arrange at interval, constitute the capacitive sensing structure, makeoptical 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-mentionedoptical 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.Whenoptical filter box 200 is applied to product, generally be thatsubstrate 210 is positioned near eyes of user one side, andfilter layer 220 is positioned at away from eyes of user one side, so whenconductive layer 230 is embedded atfilter layer 220 during away from a side ofsubstrate 210, be not more than the live width of gridline as long as guarantee the live width ofconductive thread 240, just can not influence the light transmission of optical filtering portion, because after being mapped to conductive grid from the illumination ofpolaroid 10 directions projection down, sheltered from bylight shielding part 222, andlight shielding part 222 has opaqueness.

See also Fig. 4 and Fig. 5, in present embodiment,optical filtering portion 224 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 black dyes is formed at substrate surface, and light shielding part 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 244 is compacter evenly, and can increase the contrast of R, G, B light.Light shielding part 242 can effectively be avoided chromatic photoresist colour contamination each other.

See also Fig. 5, in present embodiment,conductive thread 240 can be straight line, curve or broken line.Whenconductive thread 240 can be for difformity, reduced production requirement.

The above-mentioned optical filter box that has touch controllable function, firstconductive pattern 232 and secondconductive pattern 234 are the impression mode and form, and can make in the following manner particularly:

(1) carrying out plasma (Plasma) earlier on the surface ofsubstrate 210 handles.Removing the dirty ofsubstrate 210 surfaces, and make the substrate surface ionization, increase follow-up and cohesiveforce filter layer 220.

(2) have the photoresist of black dyes in whole the coatings insubstrate 210 surface, impress with the impression formboard corresponding with firstconductive pattern 232 and secondconductive pattern 234, and ultraviolet ray (UV) is solidified, obtainfirst groove 2222 with firstconductive pattern 232 coupling, withsecond groove 2224 of second conductive pattern, 234 couplings.

(3) filled conductive material and solidifying infirst groove 2222 and second groove 2224.Conductive material can be among metal, carbon nano-tube, Graphene, organic conductive macromolecule and the ITO any one, forms byconductive thread 240 to intersect the conductive grid that constitutes.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) adopt exposure-developing technique, form thelight shielding part 222 of lattice-shaped.Light shielding part 222 comprises cross one another gridline, and the space of being cut apart by gridline forms grid cell.In grid cell zone gradation the R/G/B chromatic photoresist is set, formsoptical filtering portion 224.

The thickness ofoptical filtering portion 224 is not less than the thickness of light shielding part 222.Be the thickness that the thickness of filter unit is greater than or equal to gridline.As shown in Figure 3, expression is the thickness that the thickness ofoptical filtering portion 224 in the optical filter box equals light shielding part 222.As shown in Figure 4 and Figure 5, expression is that the thickness ofoptical filtering portion 224 in the optical filter box is greater than the thickness of light shielding part 222.When the thickness ofoptical filtering portion 224 during greater than the thickness oflight shielding part 222, from the light thatoptical filtering portion 224 appears, not only can see from the front, also can see from the side, thereby can increase the light emission rate ofoptical filtering portion 224.

In present embodiment, the thickness of firstconductive pattern 232 less thanfirst groove 2222 the degree of depth, the thickness of secondconductive pattern 234 is less than the degree of depth of second groove 2224.This is because conductive material can produce certain blockage effect when carrying out sintering.The degree of depth of describedfirst groove 2222 andsecond groove 2224 is less than the thickness of described light shielding part 222.Preventing thatfirst groove 2222 andsecond groove 2224 from pressing wearslight shielding part 222.

The conductive grid of at least one conductive pattern and filter unit similar fitgures each other in firstconductive pattern 232 and secondconductive pattern 234, the center line of theconductive thread 240 of at least one conductive pattern and the central lines of gridline in firstconductive pattern 232 and second conductive pattern 234.Be thatconductive thread 240 is over against gridline.Conductive grid is thatconductive thread 240 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 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 does not exceed gridline.In present embodiment, the center line of theconductive thread 240 of firstconductive pattern 232 and secondconductive pattern 234 all with the central lines of gridline.Further reduceconductive thread 240 and exposed the probability in gridline zone.Certainly, in other embodiment, the central lines of the center line of the conductive thread of arbitrary conductive pattern and gridline only.

In present embodiment, theconductive thread 240 of firstconductive pattern 232 and theconductive thread 240 of secondconductive pattern 234 are respectively to be solidify to form by the conductive material that is filled infirst groove 2222 andsecond groove 2224, and conductive material can be among metal, carbon nano-tube, Graphene, organic conductive macromolecule and the ITO any one.Therefore, when formingconductive layer 230, can pass through the impressing mould one-shot forming, the pattern that obtains presetting, and need not be by graphical etching, thereby the simplification flow process.Special when using ITO as conductive material, owing to need not etching, thus reduced waste of material, and then save cost.Adoptfirst groove 2222 andsecond groove 2224 to formconductive layer 230, make conductive material be not limited to traditional ITO, thereby increased the range of choice of conductive material.

In present embodiment, adjacent conductive pattern setting interval is with mutually insulated.As shown in Figure 6, expression be that interval width between firstconductive pattern 232 is the width of a filter unit, the interval width between firstconductive pattern 232 and secondconductive pattern 234 is the width of a filter unit.Can lack to cut off this moment by full line or permutation conductive thread.As shown in Figure 7, expression be that interval width between firstconductive pattern 232 is 0.5 μ m～50 μ m, the interval width between firstconductive pattern 232 and secondconductive pattern 234 is 0.5 μ m～50 μ m.This moment can be by cutting off the marginal portion disappearance ofconductive thread 240.

As shown in Figure 8, accommodate a filter unit in each conductive grid of firstconductive pattern 232 and second conductive pattern 234.Because theconductive thread 240 of firstconductive pattern 232 and secondconductive pattern 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 11, each conductive grid of firstconductive pattern 232 and secondconductive pattern 234 accommodates at least two filter units as Fig. 9.Because theconductive thread 240 of firstconductive pattern 232 and secondconductive pattern 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 9, only on X-direction, each conductive grid of firstconductive pattern 232 and secondconductive pattern 234 holds at least two filter units.As shown in figure 10, only on Y direction, each conductive grid of firstconductive pattern 232 and secondconductive pattern 234 holds at least two filter units.As shown in figure 11, on X-axis and Y direction, each conductive grid of firstconductive pattern 232 and secondconductive pattern 234 holds at least two filter units simultaneously.

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 (10)

1. an optical filter box comprises substrate, it is characterized in that, also comprises:

Filter layer, cover the side in described substrate, described filter layer comprises light shielding part and a plurality of filter unit, described light shielding part is lattice-shaped, comprise cross one another gridline, described light shielding part offers first groove and second groove away from a side of substrate, and the space of being cut apart by described gridline forms some grid cells, each described filter unit is contained in a described grid cell accordingly, forms optical filtering portion;

Conductive layer, be embedded at described light shielding part, described conductive layer comprises first conductive pattern and second conductive pattern, described first conductive pattern and second conductive pattern are in the plane of described filter layer extension direction space, described first conductive pattern and the second conductive pattern space form induction structure, described first conductive pattern and described second conductive pattern include the conductive grid that is made of conductive thread, the adjacent conductive silk thread intersects to form grid node, the conductive thread of described first conductive pattern is contained in described first groove, the conductive thread of described second conductive pattern is contained in described second groove, and the live width of the conductive thread of described first conductive pattern and second conductive pattern is not more than the live width of described gridline.

2. 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.

3. 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 second conductive pattern is all less than the live width of described gridline.

4. optical filter box according to claim 1, it is characterized in that, one of them person's conductive grid and described filter unit similar fitgures each other in described first conductive pattern and described second conductive pattern, and the central lines of the center line of the conductive thread of this conductive pattern and described gridline.

5. optical filter box according to claim 1 is characterized in that, described light shielding part is to have the photoresist of black dyes at the lattice-shaped structure of described substrate formation.

6. optical filter box according to claim 1 is characterized in that, the degree of depth of described first groove and second groove is less than the thickness of described light shielding part.

7. optical filter box according to claim 1, it is characterized in that, the conductive thread of described first conductive pattern and second conductive pattern 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.

8. optical filter box according to claim 1 is characterized in that, adjacent described first conductive pattern and the interval width between second conductive pattern are 0.5 μ m～50 μ m.

9. optical filter box according to claim 1 is characterized in that, the range content of each described conductive grid of described first conductive pattern and described second conductive pattern has been received at least one described filter unit.

10. a touch display screen is characterized in that, comprises the TFT electrode, Liquid Crystal Module, optical filter box and the polaroid that stack gradually, and described optical filter box is as any described optical filter box in the claim 1 to 9.

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