CN101620328A - Touch LCD screen - Google Patents
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- CN101620328A CN101620328A CN200810068317A CN200810068317A CN101620328A CN 101620328 A CN101620328 A CN 101620328A CN 200810068317 A CN200810068317 A CN 200810068317A CN 200810068317 A CN200810068317 A CN 200810068317A CN 101620328 A CN101620328 A CN 101620328A
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Abstract
The invention discloses a touch LCD screen, which comprises an upper substrate, a lower substrate, and a liquid crystal layer, wherein the upper substrate comprises a touch screen; the lower substrate and the upper substrate are oppositely arranged; the lower substrate comprises a thin film transistor panel; the liquid crystal layer is arranged between the upper substrate and the lower substrate; a conducting layer of the touch screen comprises a first carbon nanotube layer; and a semiconductor layer of a thin film transistor on the thin film transistor panel comprises a second carbon nanotube layer.
Description
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.LCDs comparatively commonly used at present is the LCDs (TN-LCD) of TN (twisted-nematic phase) pattern.For TN-LCD, when not applying voltage on the electrode, LCDs is in " OFF " state, and luminous energy sees through LCDs and is logical light state; When applying certain voltage on electrode, LCDs is in " ON " attitude, and the long axis of liquid crystal molecule direction is arranged along direction of an electric field, and light can not see through LCDs, so be the shading state.On electrode, apply voltage selectively, can demonstrate different patterns.
In recent years, be accompanied by the high performance and the diversified development of various electronic equipments such as mobile phone, touch navigation system, integrated form 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 modes such as finger or pen to push touch-screen on one side and operate.Thus, can manipulate the various functions of the electronic equipment of this LCDs.
Described touch-screen can be according to its principle of work and transmission medium different, be divided into four types usually, be respectively resistance-type, capacitor induction type, infrared-type and surface acoustic wave type.Wherein resistive touch screen is because it has high resolving power, high sensitivity and advantage such as durable is widely used.
Yet, resistive touch screen of the prior art generally includes an indium tin oxide layer (ITO layer) as transparency conducting layer, it adopts technology preparations such as ion beam sputtering or evaporation, and Kazuhiro Noda etc. are at document Production of Transparent Conductive Films with Inserted SiO
2AnchorLayer has introduced a kind of employing ITO/SiO among the and Application to a Resistive Touch Panel (Electronics andCommunications in Japan, Part 2, Vol.84, P39-45 (2001))
2The touch-screen of/polyethylene terephthalate layer.This ITO layer needs higher vacuum environment and need be heated to 200～300 ℃ in the process of preparation, therefore, makes that employing ITO is higher as the preparation cost of the touch-screen of transparency conducting layer.In addition, ITO layer of the prior art as transparency conducting layer have mechanical property good inadequately, be difficult to shortcomings such as bending and resistance skewness, be not suitable in the flexible touch LCD screen.In addition, ITO transparency in malaria can descend gradually.Thereby cause existing touch-screen and use the touch LCD screen of this touch-screen good inadequately, shortcoming such as sensitivity is low, linearity and accuracy are relatively poor in durability.
In view of this, necessaryly provide a kind of touch LCD screen, this touch LCD screen has that durability is good, highly sensitive, linearity and the strong advantage of accuracy.
Summary of the invention
A kind of touch LCD screen, it comprises a upper substrate, an infrabasal plate and a liquid crystal layer, this upper substrate comprises a touch-screen, this infrabasal plate and upper substrate are oppositely arranged, this infrabasal plate comprises a thin-film transistor display panel, and this liquid crystal layer is arranged between this upper substrate and the infrabasal plate, wherein, conductive layer in this touch-screen comprises one first carbon nanotube layer, and the semiconductor layer of the thin film transistor (TFT) in this thin-film transistor display panel comprises one second carbon nanotube layer.
Compared with prior art, described touch LCD screen has the following advantages: one, because the touch-screen of employing carbon nano-tube is input operation order and information directly, input equipments such as traditional keyboard, mouse or button can be replaced, thereby the structure of the electronic equipment that uses this touch LCD screen can be simplified.They are two years old, the mechanical characteristic of the excellence of carbon nano-tube makes transparency conducting layer have good toughness and physical strength, and anti-bending, so, can improve the durability of touch-screen accordingly, and then improve the durability of this touch LCD screen, simultaneously, cooperate with flexible substrate, can prepare a flexible touch LCD screen.In addition, adopt the semiconductive carbon nano tube layer to replace existing amorphous silicon, polysilicon or semiconducting organic polymer as semiconductor layer, can improve the flexibility of thin film transistor (TFT) accordingly, be particularly useful for the flexible thin-film transistor panel, and be applied in the flexible touch LCD screen.They are three years old, because carbon nano-tube has good transparency under the condition of humidity, so adopt the transparency conducting layer of carbon nanotube layer, can make this touch-screen have transparency preferably, and then help improving the resolution of this touch LCD screen as touch-screen.They are four years old, because carbon nano-tube has excellent electric conductivity, then the carbon nanotube layer of being made up of carbon nano-tube has uniform resistance distribution, thereby, adopt above-mentioned carbon nanotube layer producing transparent conductive layer, the resolution and the degree of accuracy of touch-screen be can improve accordingly, and then the resolution and the degree of accuracy of this touch LCD screen improved.They are five years old, because the carbon nano-tube of semiconductive has excellent semiconductive, therefore thin film transistor (TFT) has bigger carrier mobility, thin-film transistor display panel has the speed of response faster, thereby makes the touch LCD screen of using this thin-film transistor display panel have display performance preferably.Its six, adopt carbon nanotube layer less as the thin film transistor (TFT) size of semiconductor layer, thin-film transistor display panel resolution is higher, can be used to improve the resolution of touch LCD screen.
Description of drawings
Fig. 1 is the side-looking structural representation of the technical program embodiment touch LCD screen.
Fig. 2 is the perspective view of upper substrate in the technical program embodiment touch LCD screen.
Fig. 3 is the perspective view of infrabasal plate in the technical program embodiment touch LCD screen.
Fig. 4 is the stereoscan photograph of carbon nano-tube membrane structure in the technical program embodiment touch LCD screen.
Fig. 5 is the plan structure synoptic diagram of thin-film transistor display panel in the technical program embodiment touch LCD screen.
Fig. 6 is the cut-open view of thin film transistor (TFT) in the thin-film transistor display panel of Fig. 5.
Fig. 7 is the stereoscan photograph of the long carbon nano-tube thin-film structure in the thin film transistor (TFT) of Fig. 6.
Fig. 8 is the synoptic diagram of the technical program embodiment touch LCD screen principle of work.
Embodiment
Describe the touch LCD screen of the technical program in detail below with reference to accompanying drawing.
See also Fig. 1, the technical program embodiment provides a kind of touch LCD screen 300, it comprise a upper substrate 100, one and the infrabasal plate 200 and that is oppositely arranged of upper substrate 100 be arranged at liquid crystal layer 310 between this upper substrate 100 and the infrabasal plate 200.
Described liquid crystal layer 310 comprises the liquid crystal molecule that a plurality of length are bar-shaped.The liquid crystal material of described liquid crystal layer 310 is a liquid crystal material commonly used in the prior art.1～50 micron of the thickness of described liquid crystal layer 310, in the present embodiment, the thickness of liquid crystal layer 310 is 5 microns.
See also Fig. 2, described upper substrate 100 comprises a touch-screen 10, one first polarizing layer 110 and one first both alignment layers 112 from top to bottom successively.This first polarizing layer 110 is arranged at the lower surface of this touch-screen 10, is used to control the outgoing by the polarized light of liquid crystal layer 310.This first both alignment layers 112 is arranged at the lower surface of described first polarizing layer 110.Further, the lower surface of this first both alignment layers 112 comprises a plurality of first parallel grooves, is used to make the liquid crystal molecule of liquid crystal layer 310 to align.First both alignment layers 112 is provided with near liquid crystal layer 310 in this upper substrate 100.
This touch-screen 10 is the resistive touch screen of four lines, five lines or eight line type structures.In the present embodiment, this touch-screen 10 is the four-wire type structure, and it comprises one first battery lead plate 12, a plurality of transparent point-like spacer 16 and one second battery lead plate 14 from top to bottom successively.This second battery lead plate 14 and first battery lead plate 12 are oppositely arranged, and these a plurality of transparent point-like spacers 16 are arranged between first battery lead plate 12 and second battery lead plate 14.
This first battery lead plate 12 comprises one first matrix, 120, one first conductive layers 122 and two first electrodes 124.This first matrix 120 is a planar structure, and this first conductive layer 122 and two first electrodes 124 all are arranged on the lower surface of first matrix 120.Two first electrodes 124 are arranged on the two ends of first conductive layer 122 and are electrically connected with first conductive layer 122 along first direction respectively.This second battery lead plate 14 comprises one second matrix, 140, one second conductive layers 142 and two second electrodes 144.This second matrix 140 is a planar structure, and this second conductive layer 142 and two second electrodes 144 all are arranged on the upper surface of second matrix 140.Two second electrodes 144 are arranged on the two ends of second conductive layer 142 and are electrically connected with second conductive layer 142 along second direction respectively.Wherein first direction is perpendicular to second direction, i.e. two first electrodes 124 and two second electrode 144 quadrature settings.
First conductive layer 122 and second conductive layer 142 of described touch-screen 10 include one first carbon nanotube layer, and this carbon nanotube layer comprises a plurality of metallic carbon nanotubes.Further, above-mentioned carbon nanotube layer can be the carbon nano-tube film that lay in single carbon nano-tube film or a plurality of parallel no gap.Be appreciated that because a plurality of carbon nano-tube films in the above-mentioned carbon nanotube layer can parallel and gapless laying,, can make carbon nanotube layer according to actual needs with random length and width so the length and the width of above-mentioned carbon nanotube layer are not limit.In addition, the overlapping setting of a plurality of carbon nano-tube films can be further comprised in the above-mentioned carbon nanotube layer,,, carbon nanotube layer can be made according to actual needs with any thickness as long as can have desirable transparency so the thickness of above-mentioned carbon nanotube layer is not limit yet.
Carbon nano-tube film in the above-mentioned carbon nanotube layer is made up of orderly or unordered carbon nano-tube, and this carbon nano-tube film has homogeneous thickness.Particularly, this carbon nanotube layer comprises unordered carbon nano-tube film or orderly carbon nano-tube film.In the unordered carbon nano-tube film, carbon nano-tube is unordered or isotropy is arranged.The carbon nano-tube of this lack of alignment is twined mutually, and this isotropy carbon nanotubes arranged is parallel to the surface of carbon nano-tube film.In the orderly carbon nano-tube film, carbon nano-tube is for being arranged of preferred orient or along the different directions preferred orientation along same direction.When carbon nanotube layer comprised the multilayer order carbon nano-tube film, this multilayer carbon nanotube films can be along the overlapping setting of any direction, and therefore, in this carbon nanotube layer, carbon nano-tube is for to be arranged of preferred orient along identical or different direction.Preferably, when the carbon nano-tube film in this carbon nanotube layer was the ordered carbon nanotube film, this ordered carbon nanotube film was for directly pulling the carbon nano-tube membrane structure of acquisition from carbon nano pipe array.See also Fig. 4, described carbon nano-tube membrane structure comprises that a plurality of carbon nano-tube join end to end and are arranged of preferred orient.Between these a plurality of carbon nano-tube by the Van der Waals force combination.On the one hand, connect by Van der Waals force between the end to end carbon nano-tube; On the other hand, part is by the Van der Waals force combination between the carbon nano-tube that is arranged of preferred orient.So this carbon nano-tube membrane structure has self-supporting and pliability preferably.When comprising the carbon nano-tube membrane structure of the overlapping setting of multilayer in this carbon nanotube layer, carbon nano-tube forms an angle α in the adjacent two layers carbon nano-tube film, and 0 °≤α≤90 °
Further, described carbon nanotube layer can comprise the laminated film that an above-mentioned various carbon nano-tube film and a macromolecular material are formed.Described macromolecular material is uniformly distributed in the described carbon nano-tube film in the gap between the 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.
In the present embodiment, the carbon nanotube layer in described first conductive layer 122 and second conductive layer 142 is the laminated film that one deck carbon nano-tube membrane structure and PMMA form.Concrete, carbon nano-tube is all arranged along first direction in the carbon nano-tube membrane structure of first conductive layer 122, and carbon nano-tube is all arranged along second direction in the carbon nano-tube membrane structure of second conductive layer 142.The thickness of described carbon nano-tube coextruded film is 0.5 nanometer～100 micron, and width is 0.01 centimetre～10 centimetres.
Metallic carbon nanotubes comprises one or more in Single Walled Carbon Nanotube, double-walled carbon nano-tube and the multi-walled carbon nano-tubes in the described carbon nanotube layer.The diameter of described Single Walled Carbon Nanotube is 0.5 nanometer～50 nanometers, and the diameter of double-walled carbon nano-tube is 1 nanometer～50 nanometers, and the diameter of multi-walled carbon nano-tubes is 1.5 nanometers～50 nanometers.The thickness of described carbon nanotube layer is 0.5 nanometer～100 micron.
Further, in described touch-screen 10, this second battery lead plate 14 is provided with an insulation course 18 near the surface periphery of first battery lead plate 12.The first above-mentioned battery lead plate 12 is arranged on this insulation course 18, and first conductive layer 122 of this first battery lead plate 12 is over against second conductive layer, 142 settings of second battery lead plate 14.Above-mentioned a plurality of point-like spacer 16 is arranged on second conductive layer 142 of second battery lead plate 14, and these a plurality of point-like spacers 16 are intervally installed.Distance between first battery lead plate 12 and second battery lead plate 14 is 2～10 microns.This insulation course 18 all can adopt insulating resin or other insulating material to make with point-like spacer 16, and this point-like spacer 16 should be a transparent material and makes.Insulation course 18 is set makes win battery lead plate 14 and second battery lead plate, 12 electrical isolations with point-like spacer 16.Be appreciated that when touch-screen 10 sizes hour, point-like spacer 16 be selectable structure, need guarantee that first battery lead plate 14 and second battery lead plate, 12 electrical isolations get final product.
In addition, this first battery lead plate 12 further can be provided with a transparent protective film 126 away from the surface of second battery lead plate 14.Described transparent protective film 126 can directly be bonded in first matrix, 120 upper surfaces by cementing agent, also can adopt pressure sintering, presses together with first battery lead plate 12.This transparent protective film 126 can adopt layer of surface cure process, smooth scratch resistant plastic layer or resin bed, and this resin bed can be formed by materials such as phenylpropyl alcohol cyclobutane (BCB), polyester and acryl resins.In the present embodiment, the material that forms this transparent protective film 126 is polyethylene terephthalate (PET), is used to protect first battery lead plate 12, improves durability.This transparent protective film 126 can be in order to provide some additional functions, as reducing dazzle or reducing reflection.
The material of described first polarizing layer 110 can as the dichroism high-molecular organic material, be specifically as follows iodine based material or dye materials etc. for polarisation material commonly used in the prior art.In addition, this first polarizing layer 110 also can be the orderly carbon nano-tube film of one deck, and carbon nano-tube aligns along same direction in the described orderly carbon nano-tube film.Preferably, this first polarizing layer 110 is a carbon nano-tube membrane structure.The thickness of described the one the first polarizing layers 110 is 1 micron～0.5 millimeter.
Since carbon nano-tube to absorption of electromagnetic wave near absolute black body, carbon nano-tube all has the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength, so the ordered carbon nanotube film in described first polarizing layer 110 also has the polarization absorption performance of homogeneous for the electromagnetic wave of various wavelength.When light wave incident, the light that direction of vibration is parallel to the carbon nano-tube bundle length direction is absorbed, and sees through perpendicular to the luminous energy of carbon nano-tube bundle length direction, so transmitted light becomes linearly polarized light.Therefore, carbon nano-tube film can replace polaroid of the prior art to play the polarisation effect.In addition, described first polarizing layer 110 comprises the carbon nano-tube that aligns along same direction, thereby described first polarizing layer 110 has excellent conducting performance, can be used as the upper electrode layer in the touch LCD screen 300.Therefore, first polarizing layer 110 in the touch type liquid crystal display 300 of the technical program embodiment can play the effect of polarisation and top electrode simultaneously, need not additionally to increase upper electrode layer, thereby can make touch LCD screen 300 have thin thickness, simplify the structure and the manufacturing cost of touch LCD screen 300, improve the utilization factor of backlight, improve display quality.
The material of described first both alignment layers 112 can be polystyrene and derivant thereof, polyimide, polyvinyl alcohol (PVA), polyester, epoxy resin, Polyurethane, polysilane etc.First groove of described first both alignment layers 112 can adopt the film friction method of prior art, inclination evaporation SiO
xEmbrane method and film carried out method such as little groove facture and form, this first groove can make liquid crystal molecule align.In the present embodiment, the material of described first both alignment layers 112 is a polyimide, and thickness is 1～50 micron.
See also Fig. 3, described infrabasal plate 200 comprises one second both alignment layers 212, a thin-film transistor display panel 220 and one second polarizing layer 210 from top to bottom successively.This second both alignment layers 212 is arranged on the upper surface of this thin-film transistor display panel 220.Further, the upper surface of second both alignment layers 212 can comprise a plurality of second parallel grooves, and the orientation of first groove of described first both alignment layers 112 is vertical with the orientation of second groove of second both alignment layers 212.This second polarizing layer 210 is arranged on the lower surface of this thin-film transistor display panel 220.Second both alignment layers 212 is provided with near described liquid crystal layer 310 in this infrabasal plate 200.
The material of described second polarizing layer 210 is identical with the material of first polarizing layer 110.The thickness of described second polarizing layer 210 is 1 micron～0.5 millimeter.Acting as of described second polarizing layer 210 will be inclined to one side from the light that the light guide plate that is arranged at touch LCD screen 300 lower surfaces is sent, thereby obtain along the light of single direction polarization.The polarization direction of described second polarizing layer 210 is vertical with the polarization direction of first polarizing layer 110.
Described second both alignment layers 212 is identical with the material of first both alignment layers 112, and second groove of described second both alignment layers 212 can make liquid crystal molecule align.Because first groove of described first both alignment layers 112 is vertical with the orientation of second groove of second both alignment layers 212, so the arrangement angle of the liquid crystal molecule between first both alignment layers 112 and second both alignment layers 212 between two both alignment layers produces 90 degree rotations, thereby play the effect of optically-active, the polarization direction of 210 of second polarizing layers light after is partially revolved turn 90 degrees.In the present embodiment, the material of described second both alignment layers 212 is a polyimide, and thickness is 1～50 micron.
See also Fig. 5, a plurality of thin film transistor (TFT)s 222, a plurality of pixel electrode 224, multiple source polar curve 226 and a plurality of gate line 228 that described thin-film transistor display panel 220 comprises one the 3rd matrix 240 and is arranged on the 3rd matrix 240 upper surfaces.
Above-mentioned multiple source polar curve 226 is arranged in parallel by row, and above-mentioned a plurality of gate line 228 is arranged in parallel by row, and intersects and the setting of insulating with source electrode line 226, thereby the 3rd matrix 240 is divided into a plurality of net regions 242.Above-mentioned a plurality of pixel electrode 224 and a plurality of thin film transistor (TFT) 222 are arranged at respectively in the above-mentioned net region 242, are provided with at interval between above-mentioned a plurality of pixel electrodes 224 and between above-mentioned a plurality of thin film transistor (TFT) 222.Each net region 242 is provided with a thin film transistor (TFT) 222 and a pixel electrode 224, and this pixel electrode 224 is electrically connected with the drain electrode of this thin film transistor (TFT) 222.The source electrode of this thin film transistor (TFT) 222 is electrically connected with one source pole line 226.Particularly, arrange by row and by row with matrix-style above-mentioned net region 242.The source electrode of the thin film transistor (TFT) 222 in above-mentioned every capable net region 242 all is electrically connected with its source electrode line of being expert at 226.The grid of above-mentioned thin film transistor (TFT) 222 is electrically connected with a gate line 228.Particularly, the grid of the thin film transistor (TFT) 222 in above-mentioned every row net region 242 all is electrically connected with the gate line 228 of its column.
Further, described thin-film transistor display panel 220 can also comprise a display drive circuit (not shown), described source electrode line 226 is connected with display drive circuit with gate line 228, display drive circuit by source electrode line 226 and gate line 228 control TFT 222 switch.Described display drive circuit is integrated to be arranged on the 3rd matrix 240, forms a surface-mounted integrated circuit.
Described the 3rd matrix 240 is a transparent base, plays a supportive role, and its material may be selected to be hard material or flexible materials such as plastics, resin such as glass, quartz, pottery, adamas, silicon chip.In the present embodiment, the material of described the 3rd matrix 240 is PET.Described the 3rd matrix 240 also can be selected the printed-wiring board (PWB) in the large scale integrated circuit for use.
Described pixel electrode 224 is a conductive film, the material of this conductive film is a conductive material, when being used for LCD, this pixel electrode 224 may be selected to be transparency conducting layers such as indium tin oxide (ITO) layer, antimony tin oxide (ATO) layer, indium-zinc oxide (IZO) layer or metallic carbon nanotubes film.The area of described pixel electrode 224 is 10 square microns～0.1 square millimeter.In the present embodiment, the material of described pixel electrode 224 is ITO, and area is 0.05 square millimeter.
The material of described gate line 228 and source electrode line 226 is a conductive material, as metal, alloy, conducting polymer.This metal or alloy material can be the alloy of aluminium, copper, tungsten, molybdenum, gold, titanium, neodymium, palladium, caesium and combination in any thereof.Described gate line 228 and source electrode line 226 also can be the long line structure of metallic carbon nanotubes.The width of described gate line 228 and source electrode line 226 is 0.5 nanometer～100 micron.In the present embodiment, the material of described gate line 228 and source electrode line 226 is an aluminium, and width is 10 microns.
See also Fig. 6, described thin film transistor (TFT) 222 can be top gate type or bottom gate type structure, specifically comprises semi-conductor layer 2220, one source pole 2222, drain electrode 2224, one insulation course 2226 and a grid 2228.This semiconductor layer 2220 is electrically connected with this source electrode 2222 and drain electrode 2224, and this grid 2228 is provided with by this insulation course 2226 and this semiconductor layer 2220, source electrode 2222 and 2224 insulation that drain.
In the present embodiment, described thin film transistor (TFT) 222 is the bottom gate type structure.Above-mentioned grid 2228 is arranged at described the 3rd matrix 240 upper surfaces, above-mentioned insulation course 2226 is arranged at this grid 2228 upper surfaces, above-mentioned semiconductor layer 2220 is arranged at this insulation course 2226 upper surfaces, be provided with by insulation course 2226 and grid 2228 insulation, the above-mentioned source electrode 2222 and 2224 intervals that drain are provided with and electrically contact with above-mentioned semiconductor layer 2220.
Described semiconductor layer 2220 comprises one second carbon nanotube layer.Comprise a plurality of carbon nano-tube in this second carbon nanotube layer.This carbon nano-tube is the semiconductive carbon nano tube of single wall or double-walled.The diameter of the semiconductive carbon nano tube of described single wall is 0.5 nanometer～50 nanometers; The diameter of the semiconductive carbon nano tube of described double-walled is 1.0 nanometers～50 nanometers.Preferably, the diameter of described semiconductive carbon nano tube is less than 10 nanometers.The length of described semiconductor layer 2220 is 1 micron～100 microns, and width is 1 micron～1 millimeter, and thickness is 0.5 nanometer～100 micron.
Particularly, described second carbon nanotube layer can comprise unordered or orderly carbon nano-tube film.In the unordered carbon nano-tube film, carbon nano-tube is unordered or isotropy is arranged.The carbon nano-tube of this lack of alignment is twined mutually, and this isotropy carbon nanotubes arranged is parallel to the surface of carbon nano-tube film.In the orderly carbon nano-tube film, carbon nano-tube is for being arranged of preferred orient or along the different directions preferred orientation along same direction.Preferably, this second carbon nanotube layer comprises that one deck is by growing the orderly long carbon nano-tube thin-film structure that carbon nano-tube is formed at least.As shown in Figure 7, the carbon nano-tube in this long carbon nano-tube thin-film structure is parallel to each other and is arranged side by side, and combines closely by Van der Waals force between adjacent two carbon nano-tube.At this moment, the length of this second carbon nanotube layer equals the length of carbon nano-tube wherein.
When above-mentioned second carbon nanotube layer comprises the ordered carbon nanotube film of a plurality of overlapping settings, these a plurality of ordered carbon nanotube films can be along the overlapping setting of any direction, therefore, in this second carbon nanotube layer, carbon nano-tube in the adjacent carbon nano-tube film forms an angle α, and 0 °≤α≤90 °.Preferably, the carbon nano-tube in described second carbon nanotube layer is all arranged along source electrode to the drain directions of thin film transistor (TFT).
Among the technical program embodiment, described semiconductor layer 2220 comprises the ordered carbon nanotube film that one deck is made up of long carbon nano-tube, and the length of this semiconductor layer is 50 microns, and width is 300 microns, and thickness is 5 nanometers.Described semiconductor layer 2220 forms a raceway groove at described source electrode 2222 and the zone that drains between 2224.The length of described raceway groove is 5 microns, and width is 40～100 microns.Two ends of described carbon nano-tube connect source electrode 2222 and drain electrode 2224.
This thin-film transistor display panel 220 in touch LCD screen 300 as the driving element of liquid crystal pixel point, when applying a voltage between to the pixel electrode 224 and first polaroid 110 by described display drive circuit, liquid crystal molecule in the liquid crystal layer 310 between first both alignment layers 112 and second both alignment layers 212 aligns, thereby make via 210 inclined to one side light of second polarizing layer without optically-active direct irradiation to the first polarizing layer 110, light can not pass through first polarizing layer 110 this moment.When between the pixel electrode 224 and first polarizing layer 110, not applying voltage, can pass through 110 outgoing of first polarizing layer after the optically-active of light process liquid crystal molecule.
See also Fig. 8, this touch LCD screen 300 further comprises a touch screen controller 40, a central processing unit 50 and a display device controller 60.Wherein, this touch screen controller 40, this central processing unit 50 and this display device controller 60 threes interconnect by circuit, this touch screen controller 40 is electrically connected with this touch-screen 10, and this display device controller 60 connects the display drive circuit of the thin-film transistor display panel 220 of described infrabasal plate 200.This touch screen controller 30 is located the input of selection information by icon or menu position that touch objects such as finger 60 touch, and this information is passed to central processing unit 40.This central processing unit 40 carries out the image demonstration by the display drive circuit of these display controller 50 these thin-film transistor display panels 220 of control.
During use, applying 5V voltage respectively between first battery lead plate 12 of this touch-screen 10 and between second battery lead plate 14.The user is the demonstration of this touch LCD screen 300 of visual confirmation on one side, by touch objects 70 as finger or pen push touch-screen 10 first battery lead plates 12 and operate on one side.First matrix 120 bends in first battery lead plate 12, makes first conductive layer 122 of pushing place 71 contact with second conductive layer 142 of second battery lead plate 14 and forms conducting.Touch screen controller 40 is by measuring change in voltage on first conductive layer, 122 first directions and the change in voltage on second conductive layer, 142 second directions respectively, and carries out accurate Calculation, converts it to contact coordinate.Touch screen controller 40 passes to central processing unit 50 with digitized contact coordinate.Central processing unit 50 sends command adapted thereto according to contact coordinate, and the various functions that start electronic equipment are switched, and the display drive circuit by display controller 60 control TFT panels 220 carries out image and shows.
The carbon nano-tube that the technical program embodiment provides has the following advantages as the touch LCD screen of the transparency conducting layer and first polarizing layer: one, because the touch-screen of employing carbon nano-tube is input operation order and information directly, input equipments such as traditional keyboard, mouse or button can be replaced, thereby the structure of the electronic equipment that uses this touch LCD screen can be simplified.They are two years old, the mechanical characteristic of the excellence of carbon nano-tube makes transparency conducting layer have good toughness and physical strength, and anti-bending, so, can improve the durability of touch-screen accordingly, and then improve the durability of this touch LCD screen, simultaneously, cooperate with flexible substrate, can prepare a flexible touch LCD screen.In addition, adopt the semiconductive carbon nano tube layer to replace existing amorphous silicon, polysilicon or semiconducting organic polymer as semiconductor layer, can improve the flexibility of thin film transistor (TFT) accordingly, be particularly useful for the flexible thin-film transistor panel, and be applied in the flexible touch LCD screen.They are three years old, because carbon nano-tube has good transparency under the condition of humidity, so adopt the transparency conducting layer of carbon nanotube layer, can make this touch-screen have transparency preferably, and then help improving the resolution of this touch LCD screen as touch-screen.They are four years old, because carbon nano-tube has excellent electric conductivity, then the carbon nanotube layer of being made up of carbon nano-tube has uniform resistance distribution, thereby, adopt above-mentioned carbon nanotube layer producing transparent conductive layer, the resolution and the degree of accuracy of touch-screen be can improve accordingly, and then the resolution and the degree of accuracy of this touch LCD screen improved.The five, the first polarizing layer can play the effect of polarisation and top electrode simultaneously, need not additionally to increase upper electrode layer, thereby can make touch LCD screen have thin thickness, simplify the structure and the manufacturing cost of touch LCD screen, improve the utilization factor of backlight, improve display quality.They are six years old, because the carbon nano-tube of semiconductive has excellent semiconductive, therefore thin film transistor (TFT) has bigger carrier mobility, thin-film transistor display panel has the speed of response faster, thereby makes the touch LCD screen of using this thin-film transistor display panel have display performance preferably.Its seven, adopt carbon nanotube layer less as the thin film transistor (TFT) size of semiconductor layer, thin-film transistor display panel resolution is higher, can be used to improve the resolution of touch LCD screen.
In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, the variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.
Claims (22)
1. touch LCD screen, it comprises:
One upper substrate, this upper substrate comprises a touch-screen;
One infrabasal plate, this infrabasal plate and upper substrate are oppositely arranged, and this infrabasal plate comprises a thin-film transistor display panel; And
One liquid crystal layer is arranged between this upper substrate and the infrabasal plate,
It is characterized in that, conductive layer in this touch-screen comprises one first carbon nanotube layer, the semiconductor layer of the thin film transistor (TFT) in this thin-film transistor display panel comprises one second carbon nanotube layer, and this first carbon nanotube layer and second carbon nanotube layer comprise a plurality of carbon nano-tube.
2. touch LCD screen as claimed in claim 1 is characterized in that, the carbon nano-tube in described second carbon nanotube layer is a semiconductive carbon nano tube.
3. touch LCD screen as claimed in claim 2 is characterized in that, described semiconductive carbon nano tube is Single Walled Carbon Nanotube or double-walled carbon nano-tube, and the diameter of semiconductive carbon nano tube is less than 10 nanometers.
4. touch LCD screen as claimed in claim 1 is characterized in that, the carbon nano-tube in described first carbon nanotube layer is a metallic carbon nanotubes.
5. touch LCD screen as claimed in claim 4, it is characterized in that, described metallic carbon nanotubes is Single Walled Carbon Nanotube, double-walled carbon nano-tube or multi-walled carbon nano-tubes, the diameter of this Single Walled Carbon Nanotube is 0.5 nanometer～50 nanometers, the diameter of this double-walled carbon nano-tube is 1.0 nanometers～50 nanometers, and the diameter of this multi-walled carbon nano-tubes is 1.5 nanometers～50 nanometers.
6. touch LCD screen as claimed in claim 1, it is characterized in that described first carbon nanotube layer or second carbon nanotube layer comprise a carbon nano-tube film, the carbon nano-tube film of a plurality of parallel no gap layings or the carbon nano-tube film of a plurality of overlapping settings.
7. touch LCD screen as claimed in claim 6 is characterized in that described carbon nano-tube film comprises the disordered carbon nano-tube film, and this disordered carbon nano-tube film comprises a plurality of carbon nano-tube lack of alignment or isotropy arrangement.
8. touch LCD screen as claimed in claim 7 is characterized in that, the carbon nano-tube in the described disordered carbon nano-tube film is twined mutually or is parallel to the carbon nano-tube film surface.
9. touch LCD screen as claimed in claim 6, it is characterized in that, described carbon nano-tube film comprises orderly carbon nano-tube film, and this ordered carbon nanotube film comprises that a plurality of carbon nano-tube are arranged of preferred orient or are arranged of preferred orient along different directions along same direction.
10. touch LCD screen as claimed in claim 9, it is characterized in that, described ordered carbon nanotube film comprises a carbon nano-tube membrane structure, this carbon nano-tube membrane structure comprises further that a plurality of carbon nano-tube join end to end and along the then excellent orientations of same direction, between these a plurality of carbon nano-tube by the Van der Waals force combination.
11. touch LCD screen as claimed in claim 10, it is characterized in that, described carbon nanotube layer comprises the carbon nano-tube membrane structure of at least two overlapping settings, and the carbon nano-tube in the adjacent two-layer carbon nano-tube membrane structure forms an angle α, and 0 °≤α≤90 °.
12. touch LCD screen as claimed in claim 9 is characterized in that, described ordered carbon nanotube film comprises a plurality of long carbon nano-tube that are parallel to each other and are arranged side by side.
13. touch LCD screen as claimed in claim 7 is characterized in that, the thickness of described carbon nano-tube film is 0.5 nanometer～100 micron.
14. touch LCD screen as claimed in claim 1 is characterized in that, described first carbon nanotube layer is a carbon nano-tube composite bed, and it comprises that at least one carbon nano-tube film and macromolecular material are uniformly distributed in the carbon nano-tube film.
15. touch LCD screen as claimed in claim 1, it is characterized in that, described touch-screen comprises: one first battery lead plate, this first battery lead plate comprises one first matrix, one first conductive layer and two first electrodes, this first conductive layer is arranged on the lower surface of this first matrix, and these two first electrodes are arranged on the two ends of this first conductive layer along first direction;
One second battery lead plate, this second battery lead plate comprises one second matrix, one second conductive layer and two second electrodes, this second conductive layer is arranged on the upper surface of this second matrix, these two second electrodes are arranged on the two ends of second conductive layer along second direction, this second direction is perpendicular to first direction, and this first conductive layer and second conductive layer include a primary carbon nanotube layer;
One insulation course, this insulation course are arranged on this second battery lead plate upper surface periphery, this first battery lead plate be arranged on this insulation course with described second battery lead plate at interval; And
A plurality of point-like spacers are arranged between described first battery lead plate and described second battery lead plate.
16. touch LCD screen as claimed in claim 15 is characterized in that, the thickness of described first conductive layer and second conductive layer is 0.5 nanometer～100 micron.
17. touch LCD screen as claimed in claim 15 is characterized in that, the carbon nano-tube in described first conductive layer aligns along first direction, and the carbon nano-tube in described second conductive layer aligns along second direction.
18. touch LCD screen as claimed in claim 1 is characterized in that, described upper substrate further comprises:
One first polarizing layer is arranged at the lower surface of this touch-screen; And
One first both alignment layers is arranged at the lower surface of this first polarizing layer, and this first both alignment layers is near described liquid crystal layer setting.
19. touch LCD screen as claimed in claim 1 is characterized in that, described thin-film transistor display panel further comprises:
One the 3rd matrix;
Multiple source polar curve, this multiple source polar curve are positioned at the 3rd body upper surface and are arranged in parallel by row;
A plurality of gate lines, these a plurality of gate lines are positioned at the 3rd body upper surface and are arranged in parallel by row, and these a plurality of gate lines intersect and the setting of insulating with this multiple source polar curve, thereby the 3rd body upper surface is divided into a plurality of net regions;
A plurality of pixel electrodes, each pixel electrode are arranged in each net region; And
A plurality of thin film transistor (TFT)s, each thin film transistor (TFT) is arranged in each net region, this thin film transistor (TFT) comprises one source pole, one and this source electrode drain electrode, semi-conductor layer and the grid that are provided with at interval, this source electrode is electrically connected with the one source pole line, this drain electrode is electrically connected with a pixel electrode, this semiconductor layer is electrically connected with this source electrode and drain electrode, and this grid is provided with and is electrically connected with a gate line with this semiconductor layer, source electrode and drain electrode insulation by an insulation course.
20. touch LCD screen as claimed in claim 1 is characterized in that, described infrabasal plate further comprises:
One second polarizing layer is arranged at this thin-film transistor display panel lower surface; And
One second both alignment layers is arranged at this thin-film transistor display panel upper surface, and this second both alignment layers is near described liquid crystal layer setting.
21., it is characterized in that described polarizing layer comprises that a plurality of carbon nano-tube are arranged of preferred orient along same direction as claim 18 or 20 described touch LCD screens.
22., it is characterized in that the thickness of described polarizing layer is 1 micron～0.5 millimeter as claim 18 or 20 described touch LCD screens.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100683173A CN101620328B (en) | 2008-07-04 | 2008-07-04 | Touch LCD screen |
| US12/459,566 US8237677B2 (en) | 2008-07-04 | 2009-07-02 | Liquid crystal display screen |
| JP2009160170A JP5415849B2 (en) | 2008-07-04 | 2009-07-06 | LCD panel using touch panel |
| US12/583,160 US8228308B2 (en) | 2008-07-04 | 2009-08-13 | Method for making liquid crystal display adopting touch panel |
| US12/583,162 US8237680B2 (en) | 2008-07-04 | 2009-08-13 | Touch panel |
| US12/583,161 US8237679B2 (en) | 2008-07-04 | 2009-08-13 | Liquid crystal display screen |
| US12/584,415 US8105126B2 (en) | 2008-07-04 | 2009-09-03 | Method for fabricating touch panel |
| US12/584,410 US8199123B2 (en) | 2008-07-04 | 2009-09-03 | Method for making liquid crystal display screen |
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| CN2008100683173A CN101620328B (en) | 2008-07-04 | 2008-07-04 | Touch LCD screen |
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| CN101620328A true CN101620328A (en) | 2010-01-06 |
| CN101620328B CN101620328B (en) | 2012-07-18 |
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| CN (1) | CN101620328B (en) |
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| CN102221949A (en) * | 2011-05-12 | 2011-10-19 | 信利半导体有限公司 | Capacitance touch screen and manufacture method thereof |
| CN103109314A (en) * | 2010-04-28 | 2013-05-15 | 株式会社半导体能源研究所 | Semiconductor display device and driving method the same |
| CN104391598A (en) * | 2014-10-31 | 2015-03-04 | 业成光电（深圳）有限公司 | Touch display device and manufacturing method thereof |
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| KR102026111B1 (en) * | 2011-10-24 | 2019-09-30 | 엘지디스플레이 주식회사 | touch panel and method of manufacturing of the same |
| CN103885639A (en) * | 2014-03-27 | 2014-06-25 | 中国科学院重庆绿色智能技术研究院 | Flexible intelligent information exchange terminal |
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| CN102221949A (en) * | 2011-05-12 | 2011-10-19 | 信利半导体有限公司 | Capacitance touch screen and manufacture method thereof |
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Also Published As
| Publication number | Publication date |
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| JP5415849B2 (en) | 2014-02-12 |
| JP2010015153A (en) | 2010-01-21 |
| CN101620328B (en) | 2012-07-18 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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