CN202929323U - Liquid crystal module with touch control function - Google Patents
Liquid crystal module with touch control function Download PDFInfo
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- CN202929323U CN202929323U CN 201220357104 CN201220357104U CN202929323U CN 202929323 U CN202929323 U CN 202929323U CN 201220357104 CN201220357104 CN 201220357104 CN 201220357104 U CN201220357104 U CN 201220357104U CN 202929323 U CN202929323 U CN 202929323U
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Abstract
A liquid crystal module with a touch control function comprises a liquid crystal module and a polarizer, wherein the liquid crystal sequentially comprises an upper substrate, an upper electrode layer, a first alignment layer, a liquid crystal layer, a second alignment layer, a thin film transistor panel, and a second polarized light layer from the top to the bottom. The polarizer has the touch control function, the polarizer comprises a first polarized light layer, a carbon nanometer tube layer, and a plurality of electrodes, wherein the carbon nanometer tube layer is arranged on the lower surface of the first polarized light layer, the carbon nanometer tube layer has impedance anisotropy for defining a lower impedance direction, the conductivity rate along the lower impedance direction of the carbon nanometer tube layer is bigger than that along the other directions of the carbon nanometer tube layer, the plurality of electrodes are arranged at intervals at least on one side edge of the lower surface of the carbon nanometer tube layer and are in electric connection with the carbon nanometer tube layer, the side edge is perpendicular to the lower impedance direction of the carbon nanometer tube layer, and the carbon nanometer tube layer with the plurality of electrodes arranged in the polarizer is arranged on the surface of the upper substrate.
Description
Technical field
The utility model relates to a kind of liquid crystal module, relates in particular to a kind of liquid crystal module with touch controllable function.
Background technology
Liquid crystal display is because low-power consumption, miniaturization and high-quality display effect become one of best display mode.At present LCDs comparatively commonly used is the TN(twisted nematic) LCDs (TN-LCD) of pattern.For TN-LCD, when not applying voltage on the drive electrode of LCDs, luminous energy sees through LCDs and is logical light state; When applying certain voltage on the drive electrode in LCDs, the long axis of liquid crystal molecule direction is parallel or oblique arrangement along direction of an electric field, and light can not or partly can see through LCDs fully, therefore be shading status.Apply voltage selectively on the drive electrode of LCDs according to image signal, can demonstrate different patterns.
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 is by touch-screen, on one side the displaying contents of the LCDs that is positioned at the touch-screen back side is carried out visual confirmation, 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.
Scheme about liquid crystal display and the integration of described touch-screen, touch-screen mainly comprises double-layer glass structure (Glass-on-Glass) and monolithic glass formula (OGS, One Glass Solution) two kinds of structures, yet, prior art is all that touch-screen is set directly at liquid crystal module top, because no matter double-layer glass structure or monolithic glass formula structure, this setup increases because glass structure makes thickness, and is unfavorable for miniaturization and the slimming of electronic equipment.And in prior art, fit together again after usually touch-screen and LCDs being made respectively, increased production procedure, be unfavorable for simplifying production technology and reduce production costs.
The utility model content
In view of this, necessaryly provide a kind of liquid crystal module with touch controllable function, this liquid crystal module with touch controllable function need not that touch-screen is set separately again can realize sensing touch.
A kind of liquid crystal module with touch controllable function comprises a liquid crystal module, and a polaroid, and described polaroid has touch controllable function, comprising: one first polarizing layer; One carbon nanotube layer is arranged on the lower surface of described the first polarizing layer, and this carbon nanotube layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this carbon nanotube layer on described Low ESR direction is greater than the conductivity on other direction; And a plurality of electrodes, these a plurality of electrode gap are arranged at least one side of the lower surface of described carbon nanotube layer, and are electrically connected to described carbon nanotube layer, and described side is perpendicular to the Low ESR direction of described carbon nanotube layer; Described liquid crystal module comprises from top to bottom successively: a upper substrate; One upper electrode layer; One first both alignment layers; One liquid crystal layer; One second both alignment layers; One thin-film transistor display panel; And one second polarizing layer, the carbon nanotube layer that is provided with a plurality of electrodes in described polaroid is arranged on described upper substrate surface.
A kind of liquid crystal module with touch controllable function comprises a liquid crystal module, and described liquid crystal module comprises from top to bottom successively: one first polarizing layer; One upper substrate; One upper electrode layer; One first both alignment layers; One liquid crystal layer; One second both alignment layers; One thin-film transistor display panel; And one second polarizing layer, in described liquid crystal module, the first polarizing layer further is provided with near the surface of upper substrate: a transparency conducting layer, this transparency conducting layer has impedance anisotropy, to define a Low ESR direction, the conductivity of this transparency conducting layer on described Low ESR direction is greater than the conductivity on other direction; And a plurality of electrodes, these a plurality of electrode gap are arranged at least one side of the lower surface of described transparency conducting layer, and are electrically connected to described transparency conducting layer, and described side is perpendicular to the Low ESR direction of described transparency conducting layer; Wherein, described transparency conducting layer and described a plurality of electrode consist of a touch module, and described the first polarizing layer and described touch module consist of the one-piece construction of independent installation and removal.
A kind of liquid crystal module with touch controllable function comprises a liquid crystal module, and a polaroid, and described polaroid has touch controllable function, comprising: a polarizing layer; One transparency conducting layer is arranged on the lower surface of described polarizing layer, and this transparency conducting layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this transparency conducting layer on described Low ESR direction is greater than the conductivity on other direction; And a plurality of electrodes, these a plurality of electrode gap are arranged at least one side of the lower surface of described transparency conducting layer, and are electrically connected to described transparency conducting layer, and described side is perpendicular to the Low ESR direction of described transparency conducting layer; Wherein, described transparency conducting layer and described a plurality of electrode consist of a touch module, and described touch module driving method comprises: scan step by step those electrodes of part at least; The signal of those electrodes that reception is scanned; The numerical values recited of the signal that receives by described electrode judges the coordinate of touch position on the Low ESR direction; The peaked described electrode of the signal that utilization receives and with the detected signal value of this electrode adjacent electrode calculate described touch position vertical should be than the coordinate on the Low ESR direction.
A kind of liquid crystal module with touch controllable function comprises a liquid crystal module, and a polaroid is arranged on described liquid crystal module surface, it is characterized in that, described polaroid has touch controllable function, comprising: a polarizing layer; One transparency conducting layer is arranged on the surface of described polarizing layer, and this transparency conducting layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this transparency conducting layer on described Low ESR direction is greater than the conductivity on other direction; And a plurality of electrodes, these a plurality of electrode gap are arranged at least one side on the surface of described transparency conducting layer, and are electrically connected to described transparency conducting layer, and described side is perpendicular to the Low ESR direction of described transparency conducting layer.
Compared with prior art, the utility model will have the more ripe liquid crystal module direct-assembling of the polaroid of polarisation and touch controllable function and manufacture craft simultaneously, need not further to install touch-screen, even liquid crystal module itself has the function of sensing touch when polaroid is installed, form described liquid crystal module with touch controllable function.This liquid crystal module with touch controllable function has thinner thickness and simple structure, and manufacturing process is simple, has reduced manufacturing cost, is conducive to the production in enormous quantities that this has the liquid crystal module of touch controllable function.
Description of drawings
The sectional structure schematic diagram of the liquid crystal module with touch controllable function that Fig. 1 provides for the utility model embodiment.
The schematic top plan view of the polaroid of the liquid crystal module with touch controllable function that Fig. 2 provides for the utility model embodiment.
The structural representation of carbon nano-tube film in the liquid crystal module with touch controllable function that Fig. 3 provides for the utility model embodiment.
Fig. 4 is the structural representation of carbon nano-tube fragment in the carbon nano-tube film of Fig. 3.
Fig. 5 is the schematic side view of polaroid in embodiment of the utility model.
Fig. 6 is the schematic side view of polaroid in another embodiment of the utility model.
Fig. 7 is the schematic side view of polaroid in another embodiment of the utility model.
Fig. 8 is the schematic diagram that the polaroid of the liquid crystal module with touch controllable function that provides of the utility model embodiment comprises driving circuit.
Fig. 9 is the drive waveforms schematic diagram of each change-over switch when scanning in driving circuit in the polaroid of the liquid crystal module with touch controllable function that provides of the utility model embodiment.
Figure 10 is extremely shown in Figure 12 is under simulation test, the signal that electrode X3 to X6 is received.
The main element symbol description
Polaroid 12
Side 112,114,116,118
The first polarizing layer 120
Electrode 124
The first both alignment layers 143
The second both alignment layers 145
Thin-film transistor display panel 146
The second polarizing layer 147
Carbon nano-tube fragment 223
Carbon nano-tube 225
Following embodiment further illustrates the utility model in connection with above-mentioned accompanying drawing.
Embodiment
Describe the liquid crystal module with touch controllable function of the utility model embodiment in detail below with reference to accompanying drawing.
See also Fig. 1 and Fig. 2, the utility model the first embodiment provides a kind of liquid crystal module 10 with touch controllable function, and it comprises a polaroid 12, and a liquid crystal module 14 is arranged on the lower surface of described polaroid 12.
Described polaroid 12 has polarisation and touch controllable function simultaneously, and is an one-piece construction, can independently mount and dismount, and comprises one first polarizing layer 120, one carbon nanotube layers 122, and a plurality of electrode 124.This carbon nanotube layer 122 is transparency conducting layer, can be used to the sensing touch point, is arranged on the lower surface of described the first polarizing layer 120.This carbon nanotube layer 122 has impedance anisotropy, and to define a Low ESR direction, the conductivity of this carbon nanotube layer 122 on this Low ESR direction is much larger than the conductivity of this carbon nanotube layer 122 on other direction.Be appreciated that except described carbon nanotube layer 122, other has the anisotropic nesa coating of impedance and also is applicable to the utility model.Described a plurality of electrode 124 is disposed at least one side of described carbon nanotube layer 122 lower surfaces, and is electrically connected to described carbon nanotube layer 122.Described side is perpendicular to described Low ESR direction.Described carbon nanotube layer 122 can consist of a touch module with these a plurality of electrodes 124, for detection of the touch point.In this manual " on " be the direction near touch-control surface, D score is the direction away from touch-control surface.This carbon nanotube layer 102 middle parts are a touching induction region 126.This carbon nanotube layer 122 has penetrability preferably.
Particularly, described carbon nanotube layer 122 comprises a plurality of carbon nano-tube, most of carbon nano-tube in these a plurality of carbon nano-tube are arranged in the same direction, thereby make carbon nanotube layer have conductivity much larger than other direction on the bearing of trend of these most of carbon nano-tube, in this carbon nanotube layer, the bearing of trend of most of carbon nano-tube is described Low ESR direction.
Described have the anisotropic carbon nanotube layer 122 of impedance and comprise that at least one pulls the carbon nano-tube film of acquisition from carbon nano pipe array.In one embodiment, described carbon nanotube layer 122 is comprised of this carbon nano-tube film.
See also Fig. 3, the self supporting structure of the one that described carbon nano-tube film is comprised of some carbon nano-tube.Described some carbon nano-tube are preferred orientation extension in the same direction.The whole bearing of trend that described preferred orientation refers to most of carbon nano-tube in carbon nano-tube film 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 film.Further, in described carbon nano-tube film, 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 film 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 film, these carbon nano-tube can not arranged the overall orientation of most of carbon nano-tube in carbon nano-tube film and be consisted of obviously impact.Described self-supporting is that carbon nano-tube film 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 film and be placed in (or being fixed in) when keeping at a certain distance away on two supporters that arrange, the carbon nano-tube film between two supporters can the membranaceous state of unsettled maintenance self.Described self-supporting is mainly by existing continuous joining end to end by Van der Waals force to extend the carbon nano-tube of arranging and realize in carbon nano-tube film.Because this carbon nano-tube film has self-supporting, the mode that can form separately again by follow-up attaching is attached at the surface that needs in polaroid 12.Need to be formed directly into the surface that needs by evaporation and sputtering technology with respect to traditional ITO layer, cause having higher requirement to forming the surface, this carbon nano-tube film is lower to the surface requirements that attaches, and carbon nano-tube film can easily be incorporated in polaroid 12.
Particularly, most carbon nano-tube of extending substantially in the same direction in described carbon nano-tube film, and nisi linearity, bending that can be suitable; Be not perhaps fully 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 film and may have the part contact.
See also Fig. 4, particularly, described carbon nano-tube film comprise a plurality of continuously and the carbon nano-tube fragment 223 that aligns.These a plurality of carbon nano-tube fragments 223 join end to end by Van der Waals force.Each carbon nano-tube fragment 223 comprises a plurality of carbon nano-tube that are parallel to each other 225, and these a plurality of carbon nano-tube that are parallel to each other 225 are combined closely by Van der Waals force.This carbon nano-tube fragment 225 has length, thickness, homogeneity and shape arbitrarily.Carbon nano-tube 225 in this carbon nano-tube film is arranged of preferred orient in the same direction.Can have the gap between carbon nano-tube in this carbon nano-tube film, thereby make the thickness in this carbon nano-tube film thickness be about 0.5 nanometer to 100 micron, be preferably 0.5 nanometer to 10 micron.
Pulling the concrete grammar that obtains described carbon nano-tube film from carbon nano pipe array comprises: (a) selected carbon nano-tube fragment 223 from described carbon nano pipe array, the present embodiment are preferably and adopt adhesive tape with certain width or adherent base bar to contact this carbon nano pipe array to have a carbon nano-tube fragment 223 of certain width with selected; (b) by mobile this stretching tool, pull this selected carbon nano-tube fragment 223 with certain speed, thereby end to endly pull out a plurality of carbon nano-tube fragments 223, and then form a continuous carbon nano-tube film.These a plurality of carbon nano-tube make this carbon nano-tube fragment 223 have certain width mutually side by side.When this chosen carbon nano-tube fragment 223 under the pulling force effect when pulling the growth substrate that direction breaks away from carbon nano pipe array gradually, due to van der Waals interaction, other carbon nano-tube fragment 223 adjacent with this selected carbon nano-tube fragment 223 one after the other is drawn out end to end, thereby forms one continuously, evenly and the carbon nano-tube film with certain width and preferred orientation.
Described carbon nano-tube film has minimum electrical impedance at draw direction, and this draw direction is described Low ESR direction, and have maximum resistance perpendicular to draw direction anti-, thereby possesses electrical impedance anisotropy, namely conducts electricity anisotropy.
This carbon nano-tube film basis is as self supporting structure and have viscosity preferably, therefore, can directly adhere to one or more these carbon nano-tube films according to the Low ESR direction at described the first polarizing layer 120 lower surfaces and form described carbon nanotube layer 122.
Because these a plurality of carbon nano-tube films are can be mutually stacked or be arranged side by side, therefore length and the width of above-mentioned carbon nanotube layer are not limit, and can arrange according to actual needs.In addition, this carbon nano-tube film has a desirable penetrability (visible light transmissivity of single-layer carbon nano-tube film is greater than 85%), and in this carbon nanotube layer, the number of plies of carbon nano-tube film is not limit, as long as can have desirable penetrability and guarantee impedance anisotropy.
Further, described carbon nanotube layer 122 can comprise the composite membrane that described carbon nano-tube film and a macromolecular material form.Described macromolecular material is uniformly distributed in described carbon nano-tube film in the gap between carbon nano-tube.Described macromolecular material is a transparent polymer material, its concrete material is not limit, and comprises polystyrene, tygon, polycarbonate, polymethylmethacrylate (PMMA), polycarbonate (PC), ethylene glycol terephthalate (PET), phenylpropyl alcohol cyclobutane (BCB), poly-cycloolefin etc.For example, described carbon nanotube layer 122 can all be laid also the laminated film of stacked this carbon nano-tube film and PMMA composition mutually along described draw direction for two-layer.The thickness of described carbon nano-tube coextruded film is 0.5 nanometer ~ 100 micron.
Described the first polarizing layer 120 can be polarisation material commonly used in prior art, can comprise that specifically an absorption has the macromolecule membrane of dichroic substance (as polyvinyl alcohol (PVA), PVA).This dichroic substance can be iodine based material or dye materials.In one embodiment, described Low ESR direction is identical with the polarization direction of described the first polarizing layer 120.Preferably, in described carbon nano-tube film, the bearing of trend of most of carbon nano-tube is identical with the polarization direction of described the first polarizing layer 120, so that described the first polarizing layer 120 has polarization effect preferably.
Described a plurality of electrode 124 is disposed on institute's carbon nanotube layer 122 lower surfaces perpendicular at least one side of described carbon nanotube layer 122 Low ESR directions.In the utility model embodiment, these a plurality of electrodes 124 are arranged on the same side of the vertical Low ESR direction of this carbon nanotube layer 122.Described a plurality of electrode 124 is formed by conductive material, specifically can be chosen as metal level, conductive polymer coating or carbon nanotube layer.The material of described metal level can be chosen as the metal of the good conductivity such as gold, silver or copper.The material of described conductive polymer coating can be chosen as polyacetylene, polyparaphenylene, polyaniline, poly-miaow fen, poly-adjoin cough up, polythiophene etc.In the present embodiment, this electrode 124 is for being respectively formed at the conductive silver slurry layer of the described carbon nanotube layer 122 same sides of lower surface by serigraphy.This polaroid 12 can realize that the multiple spot capacitance touch detects.
This polaroid 12 can further comprise the conducting wire, and this conducting wire is arranged on the periphery of this carbon nanotube layer 122, is used for described electrode 124 is connected with external circuit.
This polaroid 12 can further comprise the one deck at least in a protective seam and adhesive layer.This protective seam is for the protection of this first polarizing layer 120, and can be further used for protecting this carbon nanotube layer 122.This adhesive layer is used for the upper substrate of this polaroid 12 with liquid crystal module 14 fitted.The material of this protective seam can be Triafol T (TAC), polystyrene, tygon, polycarbonate, polymethylmethacrylate (PMMA), polycarbonate (PC), ethylene glycol terephthalate (PET), phenylpropyl alcohol cyclobutane (BCB), poly-cycloolefin etc.The material of this adhesive layer can be pressure sensitive adhesive, heat-sensitive glue or light-sensitive emulsion.
See also Fig. 5; in one embodiment; this polaroid 12 comprises that two protective seams 150 are fitted respectively and is arranged on the surface of this carbon nanotube layer 122 and this first polarizing layer 120, this carbon nanotube layer 122 and this first polarizing layer 120 are arranged between these two protective seams 150.This adhesive layer 160 is arranged at the surface of the protective seam 150 that closes on this carbon nanotube layer 122.The protective seam 150 that namely closes on this carbon nanotube layer 122 is arranged at the lower surface of described carbon nanotube layer 122, and described adhesive layer 160 is arranged at the lower surface of the protective seam 150 that closes on this carbon nanotube layer 122.
See also Fig. 6, in another embodiment, this polaroid 12 comprises that two protective seams 150 are fitted respectively and is arranged on two surfaces of the first polarizing layer 120, this first polarizing layer 120 is arranged between these two protective seams 150.This carbon nanotube layer 122 is arranged at the wherein surface of a protective seam 150, thereby a protective seam 150 is arranged between this first polarizing layer 120 and this carbon nanotube layer 122.This adhesive layer 160 is arranged at the surface of this carbon nanotube layer 122, and this carbon nanotube layer 122 is arranged between this adhesive layer 160 and this protective seam 150.
See also Fig. 7, in another embodiment, this polaroid 12 comprises that two protective seams 150 are separately positioned on the surface of this first polarizing layer 120, and this first polarizing layer 120 is arranged between these two protective seams 150.This adhesive layer 160 is arranged at the wherein surface of a protective seam 150, and this carbon nanotube layer 122 is arranged at the surface of adhesive layer 160, and this adhesive layer 160 is arranged between this carbon nanotube layer 122 and this protective seam 150.
See also Fig. 1, described liquid crystal module 14 comprises upper substrate 141, one upper electrode layer 142, one first both alignment layers 143, one liquid crystal layer 144, one second both alignment layers 145, one thin-film transistor display panels 146 and one second polarizing layers 147 from top to bottom.
This upper electrode layer 142 is arranged on the lower surface of described upper substrate 141.This first both alignment layers 143 is arranged on the lower surface of described upper electrode layer 142.This second both alignment layers 145 is arranged on described thin-film transistor display panel 146 upper surfaces and relative with this first both alignment layers 143.This liquid crystal layer 144 is arranged between this first both alignment layers 143 and this second both alignment layers 145.This second polarizing layer 147 is arranged on the lower surface of described thin-film transistor display panel 46.Be appreciated that the demand according to various functions, other extra layers of optionally insertion also between above-mentioned each layer.
In described liquid crystal module 14, described upper substrate 141 is transparent thin plate, and the material of this upper substrate 141 can be glass, quartz, adamas, plastics or resin.The thickness of this upper substrate 141 is 1 millimeter ~ 1 centimetre.In the present embodiment, the material of this upper substrate 141 is PET, and thickness is 2 millimeters.Be appreciated that the material that forms described upper substrate 141 is not limited to the above-mentioned material of enumerating, as long as can play the effect of support, and have the material of transparency preferably, all in the scope of the utility model protection.
The material of described upper electrode layer 142 can adopt the transparent conductive materials such as ITO, and this upper electrode layer 142 plays the effect that applies orientation voltage to liquid crystal layer 144.
The material of described the second polarizing layer 147 can be identical with the material of described the first polarizing layer 120.Acting as of described the second polarizing layer 147 will be polarized from the light that the light guide plate that is arranged at liquid crystal module 10 lower surfaces with touch controllable function is sent, thereby obtains along the light of single direction polarization.The polarization direction of described the second polarizing layer 147 is vertical with the polarization direction of the first polarizing layer 120.
The lower surface of described the first both alignment layers 143 can comprise a plurality of the first parallel grooves, and the upper surface of described the second both alignment layers 145 can comprise a plurality of the second parallel grooves, thereby liquid crystal molecule is aligned.The orientation of the first groove of described the first both alignment layers 143 is vertical with the orientation of the second groove of the second both alignment layers 145, therefore the arrangement angle of the liquid crystal molecule between the first both alignment layers 143 and the second both alignment layers 145 between two both alignment layers produces 90 degree rotations, thereby play the effect of optically-active, the polarization direction 90-degree rotation of the light with 147 of the second polarizing layers after partially.The material of described the first both alignment layers 143 and the second both alignment layers 145 can be polystyrene and derivant thereof, polyimide, polyvinyl alcohol (PVA), polyester, epoxy resin, Polyurethane, polysilane etc.Described the first groove and the second groove can adopt the film friction method of prior art, inclination evaporation SiOx embrane method and film is carried out the method such as little groove facture and form.In the present embodiment, the material of described the first both alignment layers 143 and the second both alignment layers 145 is polyimide, and thickness is 1 ~ 50 micron.
Described liquid crystal layer 144 comprises the liquid crystal molecule that a plurality of length are bar-shaped.The liquid crystal material of described liquid crystal layer 144 is liquid crystal material commonly used in prior art.The thickness of described liquid crystal layer 144 is 1 ~ 50 micron, and in the present embodiment, the thickness of liquid crystal layer 144 is 5 microns.
The concrete structure of described thin-film transistor display panel 146 inside is not shown in Figure 1, but those skilled in the art can learn this thin-film transistor display panel 146 and can further comprise a transparent infrabasal plate, be formed at a plurality of thin film transistor (TFT)s of this infrabasal plate 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.This pixel electrode coordinates with described upper electrode layer 142 under the control of thin film transistor (TFT), for this liquid crystal layer 144 applies the orientation electric field, thereby the liquid crystal molecule in liquid crystal layer 144 is aligned.These a plurality of pixel electrodes are relative with described touching induction region 126.
In addition, in the utility model embodiment, also the first polarizing layer 120 in described polaroid 12 can be arranged on upper substrate 141 in described liquid crystal module 14 away from the surface of described transparency conducting layer 122 and form described liquid crystal module 10 with touch controllable function away from the surface of described the second polarizing layer 147, even described the first polarizing layer 120 is arranged between described carbon nanotube layer 122 and described upper substrate 141.
The utility model embodiment utilizes the impedance anisotropy of described carbon nanotube layer 122, can realize by the input of described a plurality of electrodes 124 detection of a plurality of touch points simultaneously.For clear description this case has the multiple spot testing process of the polaroid 12 of touch controllable function, element or the term at first needs used are numbered description.
See also Fig. 8, the described carbon nanotube layer 122 of the utility model embodiment is comprised of a described carbon nano-tube film.This carbon nanotube layer 122 has different resistance on two different directions, be basically parallel to the carbon nano-tube bearing of trend to define a Low ESR direction D(), and one high impedance direction H(be basically perpendicular to the carbon nano-tube bearing of trend), wherein Low ESR direction D can be vertical with high impedance direction H.This carbon nanotube layer 122 can be rectangle, and has four side, is sequentially side 112, side 114, side 116 and side 118.Side 112 is relative with side 116 and be parallel to high impedance direction H, and side 114 and side 118 relatively and be parallel to Low ESR direction D.Side 112 is relative with side 116 and be parallel to high impedance direction H, and side 114 and side 118 relatively and be parallel to Low ESR direction D.
Described a plurality of electrode 124 can be used for receiving driving signal and sensing touching signal simultaneously, is disposed at the same side 112 of described carbon nanotube layer 122, and is electrically connected to this carbon nanotube layer 122.The length W1 that each electrode 124 is prolonging on high impedance direction H can be between 1mm to 8mm, and the spacing W2 of adjacent electrode 124 can be between 3mm to 5mm.Thus, each electrode 124 signal of inputing to carbon nanotube layer 122 or being received from carbon nanotube layer 122 will mainly transmit along Low ESR direction D.This polaroid 12 just can utilize the signal transmission to have the characteristic of directivity as the basis for estimation of touch position.Certainly, in the product of reality, each be used for to drive and the size of the electrode 124 of sensing and application that spacing can be looked the required resolution of product and product and different simultaneously.That is to say, numerical value described above is not only to limit the utility model for the use that illustrates.
Particularly, described polaroid 12 can further comprise one drive circuit 130, and driving circuit 130 is connected at least part of or whole electrode 124, with sweep test or whole electrode 124 step by step.In fact driving circuit 130 can be reached by various component design and annexation, below will illustrate a kind of embodiment of circuit design.But, the following description is not to limit the utility model.In addition, in the present embodiment, a so-called element only represents to have and a kind ofly has certain function or the arrangements of components of character in polaroid 12, but not represents the quantity of this element.That is to say, above-mentioned one drive circuit 130 can only be made of single driving circuit 130, and a single driving circuit 130 can be connected to each electrode 124 seriatim through designs such as suitable tupe or multiplexers.But, the quantity of driving circuit 130 can be also a plurality of, and each driving circuit 130 can connect an electrode 124 one to one, or a plurality of electrodes 124 of one-to-many ground connection.In addition, the present embodiment is in order to make the clear driving circuit 130 that only illustrated of drawing be connected to an electrode 124, but in fact as shown in the above description, has several at least or whole electrode 124 can be connected to driving circuit 130.
In the present embodiment, driving circuit 130 comprises a ground unit 132 and one scan unit 134, and each described electrode 124 is connected to this scanning element 134 when being scanned, and is connected to this ground unit 132 when not being scanned.Wherein scanning element 134 comprises a charging circuit C, a storage circuit P and a reading circuit R, and wherein charging circuit C is in parallel with storage circuit P, and reading circuit R is connected to storage circuit P.
In addition, driving circuit 130 for example is provided with four change-over switches, and it is respectively switch SW 1, switch SW 2, switch SW 3 and switch SW 4.Whether conducting is to electrode 124 in order to charging circuit C, storage circuit P in gated sweep unit 134 and reading circuit R for switch SW 1.And in scanning element 134, whether switch SW 2 is connected to switch SW 1 in order to control charging circuit C, and switch SW 3 is in order to control storage circuit P and whether reading circuit R is connected to switch SW 1.In addition, switch SW 4 is arranged in ground unit 132 in order to control electrode 124 ground connection whether.
In the present embodiment, the type of drive that has a polaroid 12 of touch controllable function is for example that scan electrode 124 is scanned the signal of electrode 124 with reception step by step.At this, so-called scanning step by step refer to electrode 124 can batch ground or one by one with scanning element 134 conductings.When one of them electrode 124 during with scanning element 134 conducting, other electrode 124 all can with ground unit 132 conductings.In addition, scanning sequency of the present utility model is not necessarily according to the arrangement position of electrode 124 in the space.For instance, electrode 124 shown in Figure 8 can by left and right, by right and a left side, one, interval, the interval is a plurality of or be scanned according to the order without ad hoc rules.
Particularly, a plurality of electrodes 124 of polaroid 12 for example sequentially are arranged as electrode X1, electrode X2, electrode X3, electrode X4, electrode X5, electrode X6, electrode X7 and electrode X8.Under the design of the present embodiment, make electrode X3 and scanning element 134 conductings, the switch SW in scanning element 134 1 needs the switch SW 4 in conducting and ground unit 132 to need to disconnect.In addition, in the time of making electrode X3 and ground unit 132 conducting, the switch SW 1 in the 4 meeting conductings of the switch SW in ground unit 132 and scanning element 134 can disconnect.At this, ground unit 132 is for example to be connected to an earthing potential or a current potential of fixing or the element of a high impedance.
For instance, shown in Figure 9 is the drive waveforms schematic diagram of each change-over switch when scanning in the driving circuit of the utility model one embodiment.Please refer to Fig. 9, from top to bottom be sequentially the drive waveforms of switch SW 1, switch SW 2, switch SW 3 and switch SW 4 in waveform shown in Figure 9.The time that time T 1 is carried out for scanning motion.In addition, in the present embodiment, in each drive waveforms, switch SW 1 ~ SW4 corresponding to the time representation of high levle is switched on (namely opening turn on), the time of low level represents that corresponding switch SW 1 ~ SW4 is disconnected (namely closing turn off).
Please be simultaneously with reference to Fig. 8 and Fig. 9, in time T 1, switch SW 1 is switched on, and switch SW 4 is disconnected.So counter electrode 124 can be with scanning element 134 conductings to scan and sensing.In addition, in time T 1, switch SW 2 and switch SW 3 alternately one are switched on, and another one is disconnected.In the present embodiment, switch SW 2 is respectively T2 and T3 with the time that switch SW 3 is switched on, and after switch SW 2 was disconnected, switch SW 3 can postpone a period of time t1 and just be switched on.Thus, in time T 1, corresponding electrode 124 will alternately be connected to charging circuit C and storage circuit P.In one embodiment, time T 1 is for example 20 microseconds (μ s), and time T 2 is for example 0.3 microsecond with time T 3, and time t1 is for example 0.025 microsecond.But, with different type of drive, time T 3 is time T 2 and then also, that is time t1 can be zero.In brief, the length of these times determines when looking the factor such as the ability of driving circuit 130 and actual product size.
With the present embodiment, charging circuit C for example connects a voltage source (not shown), and storage circuit P for example connects an external capacitive Cout.When touching display screen 10 is touched with finger or conducting medium by the user, can produce a hand capacity between carbon nanotube layer 122 and finger (or conducting medium).At this moment, charging circuit C and storage circuit P will alternately discharge and recharge hand capacity.Reading circuit R just can read the charge volume of hand capacity in time T 1, and magnitude of voltage for example is with the basis for estimation as touch position.In the present embodiment, above-mentioned design is only a kind of practice mode of driving circuit 130.In other embodiments, driving circuit 130 can be comprised of other functional unit.That is to say, every electrode 124 that can be connected to can become the topological design of driving circuit 130 with the circuit design that determines hand capacity.
Please continue with reference to Fig. 8, in a simulation test, contact area that touch action causes each time for example is preset as 5mm * 5mm, and in storage circuit P, set external capacitive Cout is for example 100pf.In addition, to carry out the emulation of nine touch position in this simulation test, and the central point of these touch position is for example position I ~ position IX, position I ~ position III aligning electrodes X4 wherein, position IV ~ position VI is offset towards electrode X5 by position I ~ position III respectively, and position VII ~ position IX is offset towards electrode X5 by position IV ~ position VI respectively.And in this experiment, the distance between position VII ~ position IX and electrode X4 is set equal to the distance between position VII ~ position IX and electrode X5.
Figure 10 is extremely shown in Figure 12 is under simulation test, the signal that electrode X3 to X6 is received.Please first simultaneously with reference to Fig. 8 and Figure 10, the carbon nanotube layer 122 of the present embodiment has impedance anisotropy, so the path transmission of electric current will mainly be parallel to Low ESR direction D.When position I was touched, the received signal of electrode X3 ~ X6 (namely reading circuit R read voltage) was in fact as shown in Figure 10 middle polyline 310.When position II and position III are touched, the received signal of electrode X3 ~ X6 respectively as Figure 10 middle polyline 320 with as shown in broken line 330.
Though position I ~ position III is aligning electrodes X4 similarly, can produce different signals, when wherein position III is touched, the signal minimum that electrode X4 is received.In this emulation, nearer when the distance of touch position I ~ IX and electrode 124, the received signal of corresponding electrode 124 is larger.So the numerical values recited of the signal that described polaroid 12 can self-electrode 124 receives judges the coordinate of touch position on Low ESR direction D.
Then, please refer to Figure 11, the signal that when broken line 340 ~ broken line 360 is sequentially touch position and is positioned at position IV ~ position VI, electrode X3 receives to electrode X6.Due to position IV ~ position VI respectively with respect to position I ~ position III towards electrode X5 skew, the action that electrode X4 and electrode X5 can discharge and recharge hand capacity.But, touch a little that the received signal of electrode X4 can be higher than the received signal of electrode X5 when position IV ~ position VI.
Similarly, please refer to Figure 12, the signal that when broken line 370 ~ broken line 390 is sequentially touch position and is positioned at position VII ~ position IX, electrode X3 receives to electrode X6.At this, touch position is positioned at position VII ~ position IX wherein during one, and electrode X4 can receive identical signal in fact with electrode X5.By the signal relation of Figure 10 to Figure 12 as can be known, if will judge touch position at the coordinate of high impedance direction H, can more adjacent three signals that electrode 124 is received.For example, judge that touch position is at the coordinate of high impedance direction H, can take out adjacent three and drive in the received signal of sensing electrodes 124, higher both signal value, and both signal value obtains corresponding coordinate figure with interpolation or with a proportionate relationship addition with this.Proportionate relationship described herein can be based on the variation of signal value received in simulation process and is determined.Namely in one embodiment, described polaroid 12 with touch controllable function utilizes the peaked described electrode 124 of the signal that receives and calculates the coordinate of described touch position on the high impedance direction with the detected signal value of these electrode 124 adjacent electrodes.
Particularly, after described polaroid 12 with touch controllable function completes, can carry out according to required resolution l-G simulation test in each position in the hope of the variation relation of the received signal of each electrode 124 corresponding to different touch position.This relation is built on drive when namely can be used as the polaroid 12 of user's practical operation in the future in sensor chip, the foundation of judgement touch position.
The carbon nanotube layer 122 of the present embodiment has impedance anisotropy, makes the received signal of each electrode 124 can directly reflect the distance of touch position.Therefore, this polaroid 12 has better sensing accuracy.In addition, this polaroid 12 can electrode receives the numerical value of signal and the numerical value of comparison adjacent electrode received signal is made touch position by directly reading, and does not need complicated driving method and calculation program.Generally, the polaroid 12 that proposes of the present embodiment with simple in structure, the sensing accuracy is high and the easy characteristics of driving method.
In the utility model, because the carbon nanotube layer as transparency conducting layer is a self supporting structure, only need be laid immediately on described the first polarizing layer surface and the corresponding electrode that forms can form a polaroid with touch controllable function, this step is simple and can be compatible to existing liquid crystal module manufacturing process, avoid increasing the manufacturing step of extra touch-screen, thereby avoid improving the manufacturing cost of the liquid crystal module with touch controllable function.In addition, the more ripe liquid crystal module direct-assembling of the polaroid of polarisation and touch controllable function and manufacture craft will be had simultaneously, need not further to install touch-screen, even liquid crystal module itself has the function of sensing touch when polaroid is installed, form described liquid crystal module with touch controllable function.This liquid crystal module with touch controllable function has thinner thickness and simple structure, and manufacturing process is simple, reduced manufacturing cost, be conducive to have the production in enormous quantities of the liquid crystal module of touch controllable function, in addition, because described polaroid and liquid crystal module with touch controllable function can separately be made, therefore, the yield of each module can be controlled respectively, thereby is making the described increase that can avoid unnecessary cost when having the liquid crystal module of touch controllable function.
In addition, those skilled in the art can also do other variation in the utility model spirit, and certainly, the variation that these are done according to the utility model spirit is within all should being included in the utility model scope required for protection.
Claims (19)
1. the liquid crystal module with touch controllable function, comprise a liquid crystal module, and a polaroid, and described liquid crystal module comprises from top to bottom successively: a upper substrate; One upper electrode layer; One first both alignment layers; One liquid crystal layer; One second both alignment layers; One thin-film transistor display panel; And one second polarizing layer, it is characterized in that, described polaroid has touch controllable function, comprising:
One first polarizing layer;
One carbon nanotube layer is arranged on the lower surface of described the first polarizing layer, and this carbon nanotube layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this carbon nanotube layer on described Low ESR direction is greater than the conductivity on other direction; And
A plurality of electrodes, these a plurality of electrode gap are arranged at least one side of the lower surface of described carbon nanotube layer, and be electrically connected to described carbon nanotube layer, described side is perpendicular to the Low ESR direction of described carbon nanotube layer, and the carbon nanotube layer that is provided with a plurality of electrodes in described polaroid is arranged on described upper substrate surface.
2. the liquid crystal module with touch controllable function as claimed in claim 1, is characterized in that, this polaroid is the one-piece construction of independent installation and removal.
3. the liquid crystal module with touch controllable function as claimed in claim 1, is characterized in that, described Low ESR direction is identical with the polarization direction of described the first polarizing layer.
4. the liquid crystal module with touch controllable function as claimed in claim 1, it is characterized in that, described carbon nanotube layer comprises at least one carbon nano-tube film, this carbon nano-tube film comprises a plurality of carbon nano-tube, the same direction of the most of carbon nanotube-based present dynasty in these a plurality of carbon nano-tube is extended, and in this carbon nanotube layer, the bearing of trend of most of carbon nano-tube is described Low ESR direction.
5. the liquid crystal module with touch controllable function as claimed in claim 4, is characterized in that, the self supporting structure that described carbon nano-tube film is integrated.
6. the liquid crystal module with touch controllable function as claimed in claim 4, it is characterized in that, in most of carbon nano-tube of extending in the same direction in described carbon nano-tube film, each carbon nano-tube joins end to end by Van der Waals force with carbon nano-tube adjacent on bearing of trend.
7. the liquid crystal module with touch controllable function as claimed in claim 4, it is characterized in that, described polaroid further comprises one drive circuit, be electrically connected at least part of described a plurality of electrodes, to scan step by step these a plurality of electrodes of part at least, described a plurality of electrodes are used for simultaneously receiving the driving signal and sensing is touched signal.
8. the liquid crystal module with touch controllable function as claimed in claim 7, is characterized in that, this driving circuit comprises a ground unit and one scan unit, and each described electrode is connected to this scanning element when being scanned, and be connected to this ground unit when not being scanned.
9. the liquid crystal module with touch controllable function as claimed in claim 8, is characterized in that, this scanning element comprises a charging circuit, a storage circuit and a reading circuit, and this charging circuit is in parallel with this storage circuit, and this reading circuit is connected to this storage circuit.
10. the liquid crystal module with touch controllable function as claimed in claim 9, it is characterized in that, when this has the liquid crystal module of touch controllable function when touched, the distance of touch position and described electrode is nearer, the received signal of corresponding described electrode is larger, and described polaroid judges the coordinate of touch position on the Low ESR direction by the numerical values recited of the signal that described electrode receives.
11. the liquid crystal module with touch controllable function as claimed in claim 10, it is characterized in that, be defined as the high impedance direction perpendicular to described low-impedance direction, the peaked described electrode of the signal that described polaroid utilization receives and calculate the coordinate of described touch position on the high impedance direction with the detected signal value of this electrode adjacent electrode.
12. the liquid crystal module with touch controllable function as claimed in claim 1 is characterized in that this polaroid further comprises a protective seam, this protective seam is arranged between this first polarizing layer and this carbon nanotube layer.
13. the liquid crystal module with touch controllable function as claimed in claim 12 is characterized in that this polaroid further comprises an adhesive layer, this adhesive layer is arranged between this protective seam and this carbon nanotube layer.
14. the liquid crystal module with touch controllable function as claimed in claim 1 is characterized in that this polaroid further comprises a protective seam, this protective seam is arranged at the lower surface of this carbon nanotube layer.
15. the liquid crystal module with touch controllable function as claimed in claim 14 is characterized in that this polaroid further comprises an adhesive layer, this adhesive layer is arranged at the lower surface of this protective seam.
16. the liquid crystal module with touch controllable function comprises a liquid crystal module, described liquid crystal module comprises from top to bottom successively: one first polarizing layer; One upper substrate; One upper electrode layer; One first both alignment layers; One liquid crystal layer; One second both alignment layers; One thin-film transistor display panel; And one second polarizing layer, it is characterized in that, in described liquid crystal module, the first polarizing layer further is provided with near the surface of upper substrate:
One transparency conducting layer, this transparency conducting layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this transparency conducting layer on described Low ESR direction is greater than the conductivity on other direction; And
A plurality of electrodes, these a plurality of electrode gap are arranged at least one side of the lower surface of described transparency conducting layer, and are electrically connected to described transparency conducting layer, and described side is perpendicular to the Low ESR direction of described transparency conducting layer;
Wherein, described transparency conducting layer and described a plurality of electrode consist of a touch module, and described the first polarizing layer and described touch module consist of the one-piece construction of independent installation and removal.
17. the liquid crystal module with touch controllable function comprises a liquid crystal module, and a polaroid, it is characterized in that, described polaroid has touch controllable function, comprising:
One polarizing layer;
One transparency conducting layer is arranged on the lower surface of described polarizing layer, and this transparency conducting layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this transparency conducting layer on described Low ESR direction is greater than the conductivity on other direction; And
A plurality of electrodes, these a plurality of electrode gap are arranged at least one side of the lower surface of described transparency conducting layer, and are electrically connected to described transparency conducting layer, and described side is perpendicular to the Low ESR direction of described transparency conducting layer;
Wherein, described transparency conducting layer and described a plurality of electrode consist of a touch module, and described touch module driving method comprises: scan step by step those electrodes of part at least; The signal of those electrodes that reception is scanned; The numerical values recited of the signal that receives by described electrode judges the coordinate of touch position on the Low ESR direction; The peaked described electrode of the signal that utilization receives and with the detected signal value of this electrode adjacent electrode calculate described touch position vertical should be than the coordinate on the Low ESR direction.
18. the liquid crystal module with touch controllable function comprises a liquid crystal module, and a polaroid is arranged on described liquid crystal module surface, it is characterized in that, described polaroid has touch controllable function, comprising:
One polarizing layer;
One transparency conducting layer is arranged on the surface of described polarizing layer, and this transparency conducting layer has impedance anisotropy, and to define a Low ESR direction, the conductivity of this transparency conducting layer on described Low ESR direction is greater than the conductivity on other direction; And
A plurality of electrodes, these a plurality of electrode gap are arranged at least one side on the surface of described transparency conducting layer, and are electrically connected to described transparency conducting layer, and described side is perpendicular to the Low ESR direction of described transparency conducting layer.
19. the liquid crystal module with touch controllable function as claimed in claim 18 is characterized in that, the polarizing layer in described polaroid is arranged on the surface of described liquid crystal module away from the surface of described transparency conducting layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357104 CN202929323U (en) | 2012-07-23 | 2012-07-23 | Liquid crystal module with touch control function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357104 CN202929323U (en) | 2012-07-23 | 2012-07-23 | Liquid crystal module with touch control function |
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| CN202929323U true CN202929323U (en) | 2013-05-08 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103455226A (en) * | 2013-08-16 | 2013-12-18 | 邓伟廷 | Integrated touch display screen |
| CN103576351A (en) * | 2012-07-23 | 2014-02-12 | 天津富纳源创科技有限公司 | Liquid crystal module having touch function |
| CN103713440A (en) * | 2013-12-19 | 2014-04-09 | 京东方科技集团股份有限公司 | Liquid crystal lens and display device |
| CN104714321A (en) * | 2013-12-17 | 2015-06-17 | 冠捷投资有限公司 | Touch-control display |
| CN105700217A (en) * | 2014-11-26 | 2016-06-22 | 联想(北京)有限公司 | A polarizer, a liquid crystal display screen and an electronic apparatus |
| WO2020199155A1 (en) * | 2019-04-03 | 2020-10-08 | 深圳市汇顶科技股份有限公司 | Thin film semiconductor structure and related operation method, and handheld apparatus having fingerprint sensing function |
-
2012
- 2012-07-23 CN CN 201220357104 patent/CN202929323U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103576351A (en) * | 2012-07-23 | 2014-02-12 | 天津富纳源创科技有限公司 | Liquid crystal module having touch function |
| CN103455226A (en) * | 2013-08-16 | 2013-12-18 | 邓伟廷 | Integrated touch display screen |
| CN104714321A (en) * | 2013-12-17 | 2015-06-17 | 冠捷投资有限公司 | Touch-control display |
| CN103713440A (en) * | 2013-12-19 | 2014-04-09 | 京东方科技集团股份有限公司 | Liquid crystal lens and display device |
| CN103713440B (en) * | 2013-12-19 | 2016-08-17 | 京东方科技集团股份有限公司 | Liquid crystal lens and display device |
| CN105700217A (en) * | 2014-11-26 | 2016-06-22 | 联想(北京)有限公司 | A polarizer, a liquid crystal display screen and an electronic apparatus |
| WO2020199155A1 (en) * | 2019-04-03 | 2020-10-08 | 深圳市汇顶科技股份有限公司 | Thin film semiconductor structure and related operation method, and handheld apparatus having fingerprint sensing function |
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Effective date of registration: 20210609 Address after: 550003 Electronic Information Industrial Park, Gui'an New District, Guizhou Province, China Patentee after: Guizhou Funa Yuanchuang Technology Co.,Ltd. Address before: 300457 No.15 workshop, 80 Haiyun street, Binhai New Area Economic and Technological Development Zone, Tianjin Patentee before: TIANJIN FUNAYUANCHUANG TECHNOLOGY Co.,Ltd. |
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