CN103592788A - Touch liquid crystal display screen - Google Patents
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- CN103592788A CN103592788A CN201310490033.4A CN201310490033A CN103592788A CN 103592788 A CN103592788 A CN 103592788A CN 201310490033 A CN201310490033 A CN 201310490033A CN 103592788 A CN103592788 A CN 103592788A
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Abstract
The invention relates to a touch liquid crystal display screen comprising a touch screen. A transparent conductive layer in the touch screen is a carbon nanotube layer comprising a plurality of carbon nanotubes, most of which are oriented and arranged in the direction preferably. The carbon nanotube layer is of conductive anisotropy and has the effect of light polarization. Therefore, the carbon nanotube layer can serve as both the transparent conductive layer in the touch screen and a first polarizer of the touch liquid crystal display screen. A first substrate of the touch screen also serves as an upper substrate of the upper substrate.
Description
This case is that the application number of applying on May 31st, 2010 is 201010187834.X, and name is called the division of the Chinese invention patent application of " touch LCD screen ".
Technical field
The present invention relates to a kind of LCDs, relate in particular to a kind of touch LCD screen.
Background technology
Liquid crystal display is because low-power consumption, miniaturization and high-quality display effect become one of best display mode.In recent years, be accompanied by high performance and the diversified development of the various electronic equipments such as mobile phone, touch navigation system, integrated computer display and interactive TV, the electronic equipment that the touch-screen of light transmission is installed at the display surface of LCDs increases gradually.The user of electronic equipment passes through touch-screen, to be positioned at the displaying contents of the LCDs at the touch-screen back side carry out visual confirmation on one side, utilize the modes such as finger or pen to press touch-screen on one side and operate.Thus, can operate the various functions of the electronic equipment that uses this LCDs.
Yet the LCDs of existing use capacitance touch screen comprises a capacitance touch screen, one first polaroid, one second matrix, one first both alignment layers, liquid crystal layer, one second both alignment layers, a thin film transistor (TFT) template and one second polaroid from outside to inside successively.Described capacitance touch screen can be single-point type or multipoint mode, the conventional projection-type capacitive touch screen of the multiple spot capacitance touch screen of take is example, it generally comprises one first matrix, one first indium tin oxide (Indium Tin Oxide from outside to inside, ITO) layer (calling ITO layer in the following text), one second matrix, one the 2nd ITO layer, the 2nd ITO layer contacts setting with described the first polaroid.As can be seen here, touch-screen is integrated in and in LCDs, must makes the thickness of LCDs increase, complicated structure, is unfavorable for the miniaturization of electronic equipment and the development of slimming of LCDs and application LCDs.
In view of this, necessaryly provide a kind of touch liquid crystal display, this touch liquid crystal display has thinner thickness, and structure is simpler.
Summary of the invention
In view of this, necessary a kind of thinner thickness that has, the touch LCD screen relatively simple for structure of providing.
A kind of touch LCD screen comprises from top to bottom successively: a capacitive touch screen, this capacitive touch screen comprises one first matrix and a transparency conducting layer, this transparency conducting layer is arranged at the upper surface of this first matrix, this transparency conducting layer is conduction anisotropy layer, this conduction anisotropy layer is a carbon nanotube layer, this carbon nanotube layer comprises a plurality of carbon nano-tube, and the preferred orientation extension in the same direction of the carbon nano-tube in this carbon nanotube layer; One upper substrate, this upper substrate comprises matrix on one first polaroid,, a top electrode and one first both alignment layers from top to bottom successively, and wherein, described the first polaroid is described carbon nanotube layer, and described upper matrix is described the first matrix; One liquid crystal layer; And an infrabasal plate, this infrabasal plate comprises one second both alignment layers, a thin-film transistor display panel and one second polaroid from top to bottom successively.
Comprise successively from top to bottom: a capacitive touch screen, this capacitive touch screen comprises from top to bottom successively: one second transparency conducting layer, one second matrix, one first transparency conducting layer and one first matrix; One upper substrate, this upper substrate comprises matrix on one first polaroid,, a top electrode and one first both alignment layers from top to bottom successively; One liquid crystal layer; And an infrabasal plate, this infrabasal plate comprises one second both alignment layers, a thin-film transistor display panel and one second polaroid from top to bottom successively; Wherein, a transparency conducting layer in described the first transparency conducting layer and the second transparency conducting layer is conduction anisotropy layer, this electric anisotropy layer is a carbon nanotube layer, this carbon nanotube layer comprises a plurality of carbon nano-tube, and the carbon nano-tube in this carbon nanotube layer in the same direction preferred orientation is extended, another transparency conducting layer comprises a plurality of spaced conductive structures, and described the first polaroid is described carbon nanotube layer, and described upper matrix is described the first matrix.
Compared with prior art, touch LCD screen provided by the invention adopts carbon nanotube layer not only as the transparency conducting layer of touch-screen, and double as the first polaroid of this touch LCD screen, the first matrix in described capacitive touch screen doubles as the upper matrix of described upper substrate, therefore, this touch LCD screen has simple structure and thinner thickness, has simplified manufacturing process, has reduced manufacturing cost.
Accompanying drawing explanation
Fig. 1 is the diagrammatic cross-section of the touch LCD screen that provides of first embodiment of the invention.
Fig. 2 is the schematic top plan view of the touch-screen in Fig. 1.
Fig. 3 is the stereoscan photograph of the carbon nano-tube membrane of the transparency conducting layer employing in Fig. 1.
Fig. 4 is the diagrammatic cross-section of the touch LCD screen that provides of second embodiment of the invention.
Fig. 5 is the schematic top plan view of the touch-screen in Fig. 4.
Main element symbol description
| Touch LCD screen | 10；20 |
| Touch-screen | 110；210 |
| The first matrix | 112；211 |
| Transparency conducting layer | 114 |
| The |
115；216 |
| The |
116；218 |
| Protective |
118；215 |
| Upper substrate | 120；220 |
| The first both alignment layers | 122；222 |
| Top electrode | 124；224 |
| Infrabasal plate | 130；230 |
| The second both alignment layers | 132；232 |
| Thin-film transistor display panel | 134；234 |
| The second polaroid | 136；236 |
| Liquid crystal layer | 140；240 |
| The first |
212 |
| The |
213 |
| The second |
214 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with the accompanying drawings and the specific embodiments, touch LCD screen provided by the invention is described in further detail.
Refer to Fig. 1, first embodiment of the invention provides a kind of touch LCD screen 10.It comprises this touch LCD screen 10: a touch-screen 110, a upper substrate 120, an infrabasal plate 130 and a liquid crystal layer 140.Wherein, described touch-screen 110 is arranged at the upper surface of this upper substrate 120; Described infrabasal plate 130 is oppositely arranged with described upper substrate 120; Described liquid crystal layer 140 is arranged between described upper substrate 120 and described infrabasal plate 130.In this manual, " on ", D score only refers to relative orientation, " on " refer to that D score refers to the direction away from the touch-surface of touch LCD screen near the direction of the touch-surface of touch LCD screen.
See also Fig. 2, described touch-screen 110 is a surface capacitance type touch screen, and this touch-screen 110 comprises one first matrix 112, a transparency conducting layer 114, two the first electrodes 115, two the second electrodes 116 and protective clear layers 118.Wherein, described transparency conducting layer 114 is arranged at the upper surface of described the first matrix 112; Described two the first electrodes 115 and two the second electrodes 116 are electrically connected to described transparency conducting layer 114; Described protective clear layer 118 can be set directly at the upper surface of described transparency conducting layer 114, for the protection of this transparency conducting layer 114.
Described upper substrate 120 comprises a transparency conducting layer 114, one first matrix 112, a top electrode 124 and one first both alignment layers 122 from top to bottom successively.Wherein, described top electrode 124 is arranged at the lower surface of described the first matrix 112.Described the first both alignment layers 122 is arranged at the lower surface of described top electrode 124, near liquid crystal layer 140, arranges.Further, the lower surface of this first both alignment layers 122 can comprise a plurality of the first parallel grooves, for the liquid crystal molecule of liquid crystal layer 140 is aligned.
Wherein, transparency conducting layer 114 in described touch-screen 110 also doubles as the first polaroid of described upper substrate 120, described the first matrix 112 is both as the matrix of described touch-screen 110, as the upper matrix of described upper substrate 120, therefore, described touch LCD screen 10 has thinner thickness and simple structure again, simplified manufacturing process, reduce manufacturing cost, improved the utilization factor of backlight, improved display quality.
Described liquid crystal layer 140 comprises the liquid crystal molecule that a plurality of length is bar-shaped.The liquid crystal material of described liquid crystal layer 140 is liquid crystal material conventional in prior art.1 ~ 50 micron of the thickness of described liquid crystal layer 140, in the present embodiment, the thickness of liquid crystal layer 140 is 5 microns.
Described infrabasal plate 130 comprises one second both alignment layers 132, a thin-film transistor display panel 134 and one second polaroid 136 from top to bottom successively.This second both alignment layers 132 is arranged on the upper surface of this thin-film transistor display panel 134, near described liquid crystal layer 140, arranges.Further, the upper surface of the second both alignment layers 132 can comprise a plurality of the second parallel grooves, and the orientation of this second groove is vertical with the orientation of the first groove of described the first both alignment layers 122.This second polaroid 136 is arranged on the lower surface of this thin-film transistor display panel 134.
Be appreciated that the demand according to various functions, between above-mentioned each layer, also optionally insert other extra layers.
Described the first matrix 112 is transparent film or thin plate.The material of this first matrix 112 can be the hard materials such as glass, quartz or adamas.Described the first matrix 112 mainly plays a part to support.When for flexible touch screen, the material of this first matrix 112 also can be the flexible materials such as plastics or resin.Particularly, this the first matrix 112 material used can be the materials such as the polyester materials such as polycarbonate (PC), polymethylmethacrylate (PMMA), polyethylene terephthalate (PET), or polyethersulfone (PES), cellulose esters, Polyvinylchloride (PVC), benzocyclobutene (BCB) or acryl resin.The thickness of this first matrix 112 is 1 millimeter ~ 1 centimetre.In the present embodiment, the material of this first matrix 112 is glass, and thickness is 5 millimeters.Be appreciated that the material that forms the first matrix 112 is not limited to the above-mentioned material of enumerating, as long as can make described the first matrix 112 have good transparency, plays the effect of support.
Transparency conducting layer 114 in described touch-screen 110 is a carbon nanotube layer.Carbon nanotube layer is a resistance anisotropy layer.Described carbon nanotube layer comprises a plurality of carbon nano-tube, and the plurality of carbon nano-tube is arranged of preferred orient in the same direction, thereby makes carbon nanotube layer at the resistance in direction, be less than the resistance of other directions.In this carbon nanotube layer, the bearing of trend of most of carbon nano-tube is basically parallel to the surface of this carbon nanotube layer, and the resistivity on carbon nano-tube bearing of trend is less than the resistivity in other directions, preferably, the resistivity of described carbon nanotube layer on carbon nano-tube bearing of trend and the ratio of the resistivity in other directions are less than or equal to 1:2, and the conductivity of carbon nanotube layer on carbon nano-tube bearing of trend is the more than 2 times of other directions.Described carbon nanotube layer comprises at least one carbon nano-tube membrane.Wherein, when described carbon nanotube layer comprises a plurality of carbon nano-tube membrane, the stacked setting of this carbon nano-tube membrane or parallel gapless are laid and are arranged, and the most of carbon nano-tube in the plurality of carbon nano-tube membrane are arranged of preferred orient substantially in the same direction, the orientation of the carbon nano-tube in adjacent carbon nano-tube membrane is basically identical.In the present embodiment, described carbon nanotube layer is a carbon nano-tube membrane, and described transparency conducting layer 114 is comprised of a carbon nano-tube membrane.The thickness of described carbon nanotube layer is not limit, and can select as required; The thickness of described carbon nanotube layer is 0.5 nanometer ~ 100 micron; Preferably, the thickness of this carbon nanotube layer is 100 nanometer ~ 200 nanometers.
Refer to Fig. 3, the self supporting structure that described carbon nano-tube membrane is comprised of some carbon nano-tube.Described some carbon nano-tube are for being arranged of preferred orient in the same direction.The whole bearing of trend that described preferred orientation refers to most of carbon nano-tube in carbon nano-tube membrane substantially in the same direction.And the whole bearing of trend of described most of carbon nano-tube is basically parallel to the surface of carbon nano-tube membrane.Further, in described carbon nano-tube membrane, most carbon nano-tube are to join end to end by Van der Waals force.In most of carbon nano-tube of extending substantially in the same direction in described carbon nano-tube membrane particularly,, each carbon nano-tube joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend.Certainly, have the carbon nano-tube of minority random alignment in described carbon nano-tube membrane, these carbon nano-tube can not arranged and form obviously impact the overall orientation of most of carbon nano-tube in carbon nano-tube membrane.Described self-supporting is that carbon nano-tube membrane does not need large-area carrier supported, and it is can be on the whole unsettled and keep self membranaceous state as long as relative both sides provide support power, be about to this carbon nano-tube membrane and be placed in (or being fixed on) while keeping at a certain distance away on two supporters that arrange, the carbon nano-tube membrane between two supporters can the membranaceous state of unsettled maintenance self.Described self-supporting mainly continuous joined end to end and is extended the carbon nano-tube of arranging and realize by Van der Waals force by existing in carbon nano-tube membrane.
Particularly, most carbon nano-tube of extending substantially in the same direction in described carbon nano-tube membrane, and nisi linearity, bending that can be suitable; Or not completely according to arranging on bearing of trend, can be suitable depart from bearing of trend.Therefore, can not get rid of between carbon nano-tube arranged side by side in most carbon nano-tube of extending substantially in the same direction of carbon nano-tube membrane and may have part contact.
Particularly, described carbon nano-tube membrane comprise a plurality of continuously and the carbon nano-tube fragment aligning.The plurality of carbon nano-tube fragment joins end to end by Van der Waals force.Each carbon nano-tube fragment comprises a plurality of carbon nano-tube that are parallel to each other, and the plurality of carbon nano-tube being parallel to each other is combined closely by Van der Waals force.This carbon nano-tube fragment has length, thickness, homogeneity and shape arbitrarily.Carbon nano-tube in this carbon nano-tube membrane is arranged of preferred orient in the same direction.
The concrete grammar that pulls the described carbon nano-tube membrane of acquisition from carbon nano pipe array comprises: (a) selected carbon nano-tube fragment from described carbon nano pipe array, and the present embodiment is preferably and adopts adhesive tape or the adherent base bar with one fixed width to contact this carbon nano pipe array to select a carbon nano-tube fragment with one fixed width; (b) by mobile this stretching tool, with certain speed, pull this selected carbon nano-tube fragment, thereby end to endly pull out a plurality of carbon nano-tube fragments, and then form a continuous carbon nano-tube membrane.The plurality of carbon nano-tube makes this carbon nano-tube fragment have one fixed width mutually side by side.When this chosen carbon nano-tube fragment under pulling force effect along when pulling the growth substrate that direction departs from carbon nano pipe array gradually, due to van der Waals interaction, other carbon nano-tube fragment adjacent with this selected carbon nano-tube fragment is one after the other drawn out end to end, thereby forms one continuously, evenly and have a carbon nano-tube membrane of one fixed width and preferred orientation.
Described carbon nano-tube membrane has minimum electrical impedance at draw direction, and have maximum resistance perpendicular to draw direction anti-, thereby possesses electrical impedance anisotropy, conducts electricity anisotropy.
The structure of described carbon nano-tube membrane is referred on August 13rd, 2008 disclosed, the Chinese invention patent application Publication Specification that publication number is CN101239712A.Because the carbon nano-tube in this carbon nano-tube membrane has good pliability, make this carbon nano-tube membrane there is good pliability, can become arbitrary shape and be difficult for breaking by bending fold; Therefore, described carbon nanotube layer also has good pliability, thereby make to adopt the touch-screen 110 of this carbon nanotube layer producing transparent conductive layer to there is good durability, and then make to use the touch LCD screen 10 of this touch-screen 110 to there is good durability.
This carbon nanotube layer has a desirable penetrability, and the visible light transmissivity of single-layer carbon nano-tube membrane is greater than 85%, and in this carbon nanotube layer, the number of plies of carbon nano-tube membrane is not limit, as long as can have desirable penetrability.
In addition, described carbon nanotube layer may further include reinforcing material, and this reinforcing material is uniformly distributed in described some carbon nano-tube, thereby forms a carbon nano-tube composite bed.Particularly, compound at least one carbon nano-tube membrane and the described reinforcing material of comprising of this carbon nano-tube, this reinforcing material is uniformly distributed in the gap between the carbon nano-tube in this at least one carbon nano-tube membrane.Wherein, described reinforcing material can be a macromolecular material or metal material.Described macromolecular material is a transparent polymer material, its concrete material is not limit, and can be polystyrene, tygon, polycarbonate, polymethylmethacrylate (PMMA), polycarbonate (PC), ethylene glycol terephthalate (PET), phenylpropyl alcohol cyclobutane (BCB) or poly-cycloolefin etc.Described metal material is the metal materials such as nickel, gold, platinum, iron, cobalt or copper.
Be appreciated that described carbon nanotube layer can also comprise the carbon nano-tube membrane through etching or laser treatment.This carbon nano-tube membrane forms a plurality of laser cut line through laser treatment on its surface, thereby further strengthens the stacked conduction anisotropy of this carbon nano-tube.
Because described transparency conducting layer 114 is a carbon nanotube layer, carbon nano-tube in this carbon nanotube layer approaches absolute black body to electromagnetic absorption, carbon nano-tube all has the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength, therefore described transparency conducting layer 114 also has the polarization absorption performance of homogeneous for the electromagnetic wave of various wavelength.And, because the carbon nano-tube in this transparency conducting layer 114 is arranged substantially in the same direction, when light wave incident, the light that direction of vibration is parallel to length of carbon nanotube direction is absorbed, luminous energy perpendicular to length of carbon nanotube direction sees through, so transmitted light becomes linearly polarized light.Therefore, this transparency conducting layer 114 not only has the effect of conduction, also there is the polarisation effect of polaroid, can be used as the first polaroid, upper substrate 120 increases polaroid without extra, thereby can make touch LCD screen 10 have thinner thickness, simplifies structure and the manufacturing cost of touch LCD screen 10, and improve the utilization factor of backlight, improve display quality.
In described touch-screen 110, described two the first electrodes 115 be disposed on described transparency conducting layer 114 along the two ends of first direction or the first matrix 112 along the two ends of first direction, be electrically connected to described transparency conducting layer 114, described first direction is the directions X shown in Fig. 2, and this first direction is arranged essentially parallel to the bearing of trend of most of carbon nano-tube; Described two the second electrodes 116 be disposed on described transparency conducting layer 114 along the two ends of second direction or the first matrix 112 along the two ends of second direction, be electrically connected to described transparency conducting layer 114, described second direction is the Y-direction shown in Fig. 2.Wherein, described first direction and second direction are as long as intersect; Preferably, described first direction is vertical with second direction arranges.
Particularly, described the first electrode 115 and the second electrode 116 can be arranged at the same surface of transparency conducting layer 114; Also can be arranged at the different surfaces of transparency conducting layer 114, as long as be electrically connected to described transparency conducting layer 114, and can on described transparency conducting layer 114, form uniform resistor network.The material of described two the first electrodes 115 and two the second electrodes 116 is metal, carbon nano-tube or other conductive materials, as long as guarantee that these two the first electrodes 115 and two the second electrodes 116 can conduct electricity.In the present embodiment, described two the first electrodes 115 are arranged at intervals at the two ends of described transparency conducting layer 114 along directions X, and described two the second electrodes 116 are arranged at intervals at the two ends of described transparency conducting layer 114 along Y-direction; And directions X and Y-direction quadrature.Described the first electrode 115 and the second electrode 116 are all the silver layer of bar shaped.
In described touch-screen 110, described protective clear layer 118 is arranged at the upper surface of described transparency conducting layer 114, can cover described two the first electrodes 115 and two the second electrodes 116 simultaneously.Described protective clear layer 118 can be formed by materials such as silicon nitride, monox, phenylpropyl alcohol cyclobutane (BCB), polyester film or acryl resins.This protective clear layer 118 also can adopt layer of surface through cure process, smooth scratch resistant plastic layer, for the protection of described transparency conducting layer 114, improves durability.This protective clear layer 118 also can be in order to some additional functions to be provided, as reduced dazzle or reduce reflection.In the present embodiment, the material of this protective clear layer 118 is polyethylene terephthalate (PET).
In described upper substrate 120, the material of described top electrode 124 can adopt the transparent conductive materials such as ITO, and this top electrode 124 plays the effect that applies orientation voltage to liquid crystal layer 140.
The material of the first both alignment layers 122 of described upper substrate 120 can be polystyrene and derivant thereof, polyimide, polyvinyl alcohol (PVA), polyester, epoxy resin, Polyurethane, polysilane etc.The first groove of described the first both alignment layers 122 can adopt the friction method of prior art, inclination evaporation SiO
xembrane method and film is carried out to the method such as micro-groove facture and form, this first groove can make liquid crystal molecule align.In the present embodiment, the material of described the first both alignment layers 122 is polyimide, and thickness is 1 ~ 50 micron.
In described infrabasal plate 130, described the second both alignment layers 132 is identical with the material of the first both alignment layers 122, and the second groove of described the second both alignment layers 132 can make liquid crystal molecule align.Because the first groove of described the first both alignment layers 122 is vertical with the orientation of the second groove of the second both alignment layers 132, therefore the arrangement angle of the liquid crystal molecule between the first both alignment layers 122 and the second both alignment layers 132 between these two both alignment layers produces 90 degree rotations, thereby play the effect of optically-active, the polarization direction 90-degree rotation of the light by 136 of the second polaroids after partially.In the present embodiment, the material of described the second both alignment layers 132 is polyimide, and thickness is 1 ~ 50 micron.
Described thin-film transistor display panel 134 further comprises one the 3rd matrix, a plurality of thin film transistor (TFT)s that are formed at the 3rd body upper surface, a plurality of pixel electrode and a display drive circuit.Described a plurality of thin film transistor (TFT) and pixel electrode connect one to one, and described a plurality of thin film transistor (TFT)s are electrically connected to display drive circuit with gate line by source electrode line.Preferably, described a plurality of thin film transistor (TFT) and a plurality of pixel electrode are arranged at the 3rd body upper surface in the mode of array.
The material of described the second polaroid 136 is polarisation material conventional in prior art, as dichroism high-molecular organic material, is specifically as follows iodine based material or dye materials etc.The material of described the second polaroid 136 can be also described carbon nano-tube membrane.The thickness of described the second polaroid 136 is 1 micron ~ 0.5 millimeter.Acting as of described the second polaroid 136 will be polarized from being arranged at the light that the backlight module of touch LCD screen 10 lower surfaces sends, thereby obtains along the light of single direction polarization.The polarization direction of the polarization direction of described the second polaroid 136 and described transparency conducting layer 114 can be vertical also can be parallel, that is, and the polarization direction of this second polaroid 136 and the polarization direction of described carbon nanotube layer can be vertical also can be parallel.In the present embodiment, the material of described the second polaroid 136 is carbon nano-tube membrane.The polarization direction of this second polaroid 136 is vertical with the polarization direction of described transparency conducting layer 114, that is the direction that, the most of carbon nano-tube in described transparency conducting layer 114 are arranged of preferred orient is vertical with the direction that the most of carbon nano-tube in this second polaroid 136 are arranged of preferred orient.
Refer to Fig. 4, second embodiment of the invention provides a touch LCD screen 20, and it comprises this touch LCD screen 20: a touch-screen 210; One upper substrate 220, described capacitance touch screen 210 is arranged at this upper substrate 220; One infrabasal plate 230, this infrabasal plate 230 is oppositely arranged with described upper substrate 220; And a liquid crystal layer 240, this liquid crystal layer 240 is arranged between described upper substrate 220 and described infrabasal plate 230.Wherein, described upper substrate 220 is followed successively by matrix on one first polaroid,, a top electrode 224 and one first both alignment layers 222 from top to bottom; Described infrabasal plate 230 comprises one second both alignment layers 232, a thin-film transistor display panel 234 and one second polaroid 236 from top to bottom successively.
The structure of the touch LCD screen 10 that the touch LCD screen 20 that this second embodiment provides and the first embodiment provide is basic identical, and difference is, the touch-screen 210 in the present embodiment is a projection-type capacitive touch screen.See also Fig. 5, this touch-screen 210 comprises one first matrix 211, one first transparency conducting layer 212, one second matrix 213, one second transparency conducting layer 214, a protective clear layer 215, a plurality of the first electrode 216 and a plurality of the second electrode 218.Wherein, described the first transparency conducting layer 212 is arranged at the upper surface of described the first matrix 211, and described the second matrix 213 is arranged between described the first transparency conducting layer 212 and the second transparency conducting layer 214.Described protective clear layer 215 is arranged at the upper surface of described the second transparency conducting layer 214.Described a plurality of the first electrode 216 along a first direction as directions X space be arranged at as described in the first transparency conducting layer 212 be parallel to as described in a side of directions X, and be electrically connected to this first transparency conducting layer 212 respectively; Described a plurality of the second electrode 218 along a second direction as Y-direction space be arranged at as described in the second transparency conducting layer 214 be parallel to as described in a side of Y-direction, and be electrically connected to this second transparency conducting layer 214 respectively.
Described the first matrix 211 is insulating material with described the second matrix 213, and all identical with the material of the first matrix 112 in the first embodiment.Described the first matrix 211 is also the upper matrix of described upper substrate 220 simultaneously, and therefore, described touch LCD screen 20 has thinner thickness and simple structure, simplified manufacturing process, reduce manufacturing cost, and improved the utilization factor of backlight, improved display quality.
Described the first transparency conducting layer 212 is arranged at the lower surface of described the second matrix 213.This first transparency conducting layer 212 is described carbon nanotube layer, and comprises a plurality of carbon nano-tube, and the plurality of carbon nano-tube in the same direction preferred orientation is extended.The material of this first transparency conducting layer 212 and identical with material and the structure of transparency conducting layer 114 in the first embodiment, so this first transparency conducting layer 212 also doubles as the first polaroid of described upper substrate 220.This carbon nanotube layer comprises carbon nano-tube membrane described at least one, this at least one carbon nano-tube membrane has minimum electrical impedance at its draw direction, and have maximum resistance perpendicular to draw direction anti-, thereby possess electrical impedance anisotropy, conduct electricity anisotropy.Wherein, second direction in this first transparency conducting layer 212 as the Y-direction in Fig. 5 be the integral shaft of the most of carbon nano-tube in this carbon nanotube layer to bearing of trend, the direction that namely carbon nano-tube in this carbon nanotube layer joins end to end and is arranged of preferred orient along Y-direction.This first transparency conducting layer 212 resistivity is in the Y direction less than its resistivity in the other direction, and maximum perpendicular to the resistivity in this Y-direction.The first direction of this first transparency conducting layer is as the directions X in Fig. 5, and this directions X is parallel to the surface of this carbon nanotube layer, and intersects with Y-direction.In the present embodiment, directions X is perpendicular to Y-direction, and this first transparency conducting layer 212 resistivity is in the Y direction less than its resistivity on directions X.
Because the carbon nanotube layer in this first transparency conducting layer 212 has good electric conductivity in the Y direction, when described a plurality of the first electrode 216 is arranged on this first transparency conducting layer 212 1 side spaced reciprocally along directions X, this first transparency conducting layer 212 can be regarded a plurality of spaces of formation the conductive strips parallel with Y-direction as, the plurality of conductive strips and the plurality of the first electrode 216 conductings respectively.The material of described a plurality of the first electrodes 216 is conductor, as metal.
Further, the carbon nanotube layer in this first transparency conducting layer 212 can also form a plurality of laser cut line through etching or laser treatment, and the plurality of laser cut line is extended along Y-direction, increases the conduction anisotropy of this carbon nanotube layer.
Described the second transparency conducting layer 214 is arranged at the upper surface of described the second matrix 213.This second transparency conducting layer 214 has the spaced conductive structure of a plurality of patternings, strip conductive structure for example, and it is parallel to each other and interval one predeterminable range haply.The plurality of conductive structure extends along described directions X, and arranges along the Y-direction interval of described the second transparency conducting layer 214.In general, the conducting direction of the conductive structure of this second transparency conducting layer 214 is perpendicular to the direction of the minimum specific resistance of described the first transparency conducting layer 212.In the present embodiment, the ito thin film that this second transparency conducting layer 214 is patterning, and comprise a plurality of strip conductive structures, the conducting direction of the plurality of strip conductive structure is perpendicular to the bearing of trend of the most of carbon nano-tube in described the first transparency conducting layer 212.
The material that is appreciated that described the second transparency conducting layer 214 also can be the transparent conductive materials such as carbon nano-tube.Be that described the second transparency conducting layer 214 can be a carbon nano-tube film, this carbon nano-tube film is comprised of equally distributed carbon nano-tube, and by Van der Waals force, combines closely between carbon nano-tube.Carbon nano-tube in this carbon nano-tube film is unordered or ordered arrangement.So-called lack of alignment refers to that the orientation of carbon nano-tube is random.So-called ordered arrangement refers to that the orientation of carbon nano-tube is regular.Particularly, when carbon nano-tube film comprises the carbon nano-tube of lack of alignment, carbon nano-tube is wound around or carbon nano-tube film isotropy mutually; When carbon nano-tube film comprises the carbon nano-tube of ordered arrangement, the most of carbon nano-tube in this carbon nano-tube film are arranged of preferred orient along a direction or multiple directions.
Described a plurality of the second electrode 218 is spaced a side that is arranged at described the second transparency conducting layer 214 along second direction, and distinguishes conducting with a plurality of conductive structures of this second transparency conducting layer 214.Each second electrode 218 extends along first direction.The material of the plurality of the second electrode 218 is identical with the material of described a plurality of the first electrodes 216.
Because described the first transparency conducting layer 212 and the second transparency conducting layer 214 are by described the second matrix 213 intervals, at a plurality of conductive strips of described the first transparency conducting layer 212 and the cross one another a plurality of crossover locations of a plurality of conductive structures place of described the second transparency conducting layer 214, form a plurality of electric capacity.The plurality of electric capacity can record by the external circuit being electrically connected to described the first electrode 216 and the second electrode 218.When the touch objects such as finger are during near one or more crossover location, the electric capacity of this crossover location changes, and described external circuit detects the electric capacity of this variation, thereby obtains the coordinate of this touch location.
The material of the material of described protective clear layer 215 and effect and protective clear layer 118 in touch-screen 110 in the first embodiment and act on identical.
Be appreciated that described the first transparency conducting layer 212 can exchange with material and the structure of described the second transparency conducting layer 214.As, described the first transparency conducting layer 212 can be the transparent conductive materials such as ITO or carbon nano-tube film, and has a plurality of conductive structures; The second transparency conducting layer 214 is described carbon nanotube layer, and this carbon nanotube layer has conduction anisotropy.
The touch LCD screen that the embodiment of the present invention provides, have the following advantages: first, the transparency conducting layer of the close described upper substrate that the invention process provides is carbon nanotube layer, this carbon nanotube layer is not only as the transparency conducting layer of touch-screen, and double as the first polaroid of this touch LCD screen, the first matrix in the capacitive touch screen that the embodiment of the present invention provides doubles as again the matrix of upper substrate, with respect to traditional touch LCD screen, a matrix and a polaroid have been saved, therefore there is thinner thickness and simple structure, simplified manufacturing process, reduced manufacturing cost, and improved the utilization factor of backlight, improved display quality.The second, because described carbon nanotube layer has good toughness and physical strength, therefore, adopt described carbon nanotube layer producing transparent conductive layer, can improve accordingly the durability of touch-screen, and then improve the durability of using this touch LCD screen.The 3rd, because carbon nano-tube aligns in described carbon nanotube layer, therefore, above-mentioned carbon nanotube layer producing transparent conductive layer adopted, can make transparency conducting layer there is uniform resistance and distribute, thereby improve touch-screen and use resolution and the degree of accuracy of the display device of this touch-screen.In addition, those skilled in the art can also do other and change in spirit of the present invention, and the variation that these are done according to spirit of the present invention, all should be included in the present invention's scope required for protection.
Claims (10)
1. a touch LCD screen, is characterized in that, this touch LCD screen comprises from top to bottom successively:
One capacitive touch screen, this capacitive touch screen comprises from top to bottom successively: one second transparency conducting layer, one second matrix, one first transparency conducting layer and one first matrix;
One upper substrate, this upper substrate comprises matrix on one first polaroid,, a top electrode and one first both alignment layers from top to bottom successively;
One liquid crystal layer; And
One infrabasal plate, this infrabasal plate comprises one second both alignment layers, a thin-film transistor display panel and one second polaroid from top to bottom successively;
It is characterized in that, a transparency conducting layer in described the first transparency conducting layer and the second transparency conducting layer is conduction anisotropy layer, this electric anisotropy layer is a carbon nanotube layer, this carbon nanotube layer comprises a plurality of carbon nano-tube, and the carbon nano-tube in this carbon nanotube layer is extended along second direction preferred orientation, this carbon nanotube layer comprises at least one carbon nano-tube film, another transparency conducting layer comprises a plurality of conductive structures, the plurality of conductive structure extends along first direction, and space arranges, the carbon nanotube layer that described the first polaroid is described capacitive touch screen, the first matrix that described upper matrix is described capacitive touch screen.
2. touch LCD screen as claimed in claim 1, is characterized in that, described the first transparency conducting layer is described carbon nanotube layer; Described the second transparency conducting layer comprises a plurality of conductive structures, and the plurality of conductive structure extends and is spaced setting along second direction along first direction; Wherein, described first direction is vertical with second direction arranges.
3. touch LCD screen as claimed in claim 2, it is characterized in that, described capacitive touch screen further comprises a plurality of the first electrodes and a plurality of the second electrode, the plurality of the first electrode is arranged at the side that described the first transparency conducting layer is parallel to described first direction, and the plurality of the first electrode is spaced and is arranged on this first transparency conducting layer and is electrically connected to this first transparency conducting layer along this first direction; The plurality of the second electrode is arranged at the side that described the second transparency conducting layer is parallel to described second direction, and the plurality of the second electrode is spaced and is arranged on this second transparency conducting layer and is electrically connected to described a plurality of conductive structures respectively along this second direction.
4. touch LCD screen as claimed in claim 3, is characterized in that, the material of described conductive structure is tin indium oxide or carbon nano-tube.
5. touch LCD screen as claimed in claim 1, is characterized in that, described carbon nanotube layer has a plurality of laser cut line of extending along second direction.
6. touch LCD screen as claimed in claim 1, it is characterized in that, each carbon nano-tube in most of carbon nano-tube of substantially extending towards second direction in described carbon nanotube layer joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend.
7. touch LCD screen as claimed in claim 1, is characterized in that, the resistivity of described carbon nanotube layer in second direction described in carbon nano-tube is less than the resistivity in other directions.
8. touch LCD screen as claimed in claim 7, is characterized in that, the resistivity of described carbon nanotube layer in carbon nano-tube second direction and the ratio of the resistivity in other directions are less than or equal to 1:2.
9. touch LCD screen as claimed in claim 1, is characterized in that, described carbon nanotube layer further comprises reinforcing material, and this reinforcing material is uniformly distributed in described at least one carbon nano-tube film.
10. touch LCD screen as claimed in claim 9, is characterized in that, described reinforcing material is nickel, gold, platinum, iron, cobalt or copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310490033.4A CN103592788B (en) | 2010-05-31 | Touch LCD screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310490033.4A CN103592788B (en) | 2010-05-31 | Touch LCD screen |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010187834A Division CN101852934A (en) | 2010-05-31 | 2010-05-31 | Touch liquid crystal display |
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| Publication Number | Publication Date |
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| CN103592788A true CN103592788A (en) | 2014-02-19 |
| CN103592788B CN103592788B (en) | 2016-11-30 |
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