CN101620328B - Touch LCD screen - Google Patents
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- CN101620328B CN101620328B CN2008100683173A CN200810068317A CN101620328B CN 101620328 B CN101620328 B CN 101620328B CN 2008100683173 A CN2008100683173 A CN 2008100683173A CN 200810068317 A CN200810068317 A CN 200810068317A CN 101620328 B CN101620328 B CN 101620328B
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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 on electrode, applying certain voltage, 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 through 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.
Said 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 prepared such as ion beam sputtering or vapor deposition, 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, necessary a kind of touch LCD screen is provided, 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; Said touch LCD screen has the following advantages: one of which; Because the touch-screen of employing CNT 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.Its two, the mechanical characteristic of the excellence of CNT 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 CNT 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 CNT has excellent electric conductivity; The carbon nanotube layer of then being made up of CNT has uniform resistance and distributes, 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 CNT 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 present technique scheme implementation example touch LCD screen.
Fig. 2 is the perspective view of upper substrate in the present technique scheme implementation example touch LCD screen.
Fig. 3 is the perspective view of infrabasal plate in the present technique scheme implementation example touch LCD screen.
Fig. 4 is the stereoscan photograph of CNT membrane structure in the present technique scheme implementation example touch LCD screen.
Fig. 5 is the plan structure synoptic diagram of thin-film transistor display panel in the present technique scheme implementation example 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 present technique scheme implementation example touch LCD screen principle of work.
Embodiment
Below will be described with reference to the accompanying drawings the touch LCD screen of present technique scheme.
See also Fig. 1, present technique scheme implementation example 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 the liquid crystal layer 310 between this upper substrate 100 and the infrabasal plate 200.
Said liquid crystal layer 310 comprises the liquid crystal molecule that a plurality of length are bar-shaped.The liquid crystal material of said liquid crystal layer 310 is a liquid crystal material commonly used in the prior art.1～50 micron of the thickness of said liquid crystal layer 310, in the present embodiment, the thickness of liquid crystal layer 310 is 5 microns.
See also Fig. 2, said 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 through the polarized light of liquid crystal layer 310.This first both alignment layers 112 is arranged at the lower surface of said 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 separately positioned on first conductive layer 122 and are electrically connected along the two ends of first direction and with first conductive layer 122.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 separately positioned on second conductive layer 142 and are electrically connected along the two ends of second direction and with second conductive layer 142.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 said 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 process 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 processed 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 CNT, 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, CNT is unordered or isotropy is arranged.The CNT of this lack of alignment twines each other, and this isotropy carbon nanotubes arranged is parallel to the surface of carbon nano-tube film.In the orderly carbon nano-tube film, CNT 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, CNT is for being 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 CNT membrane structure of acquisition from carbon nano pipe array.See also Fig. 4, said CNT membrane structure comprises that a plurality of CNTs join end to end and are arranged of preferred orient.Combine through Van der Waals force between these a plurality of CNTs.On the one hand, connect through Van der Waals force between the end to end CNT; On the other hand, part combines through Van der Waals force between the CNT that is arranged of preferred orient.So this CNT membrane structure has self-supporting property and pliability preferably.When comprising the CNT membrane structure of the overlapping setting of multilayer in this carbon nanotube layer, CNT forms an angle in the adjacent two layers carbon nano-tube film, and 0 °≤α≤90 °.
Further, said carbon nanotube layer can comprise the laminated film that an above-mentioned various carbon nano-tube film and a macromolecular material are formed.Said macromolecular material is uniformly distributed in the said carbon nano-tube film in the gap between the CNT.Said 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), gathers cycloolefin etc.
In the present embodiment, the carbon nanotube layer in said first conductive layer 122 and second conductive layer 142 is the laminated film that one deck CNT membrane structure and PMMA form.Concrete, CNT is all arranged along first direction in the CNT membrane structure of first conductive layer 122, and CNT is all arranged along second direction in the CNT membrane structure of second conductive layer 142.The thickness of said 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 SWCN, double-walled carbon nano-tube and the multi-walled carbon nano-tubes in the said carbon nanotube layer.The diameter of said SWCN 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 said carbon nanotube layer is 0.5 nanometer～100 micron.
Further, in said 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 process with point-like spacer 16, and this point-like spacer 16 should be a transparent material and processes.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.Said transparent protective film 126 can directly be bonded in first matrix, 120 upper surfaces through 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 said first polarizing layer 110 can like the dichroism high-molecular organic material, specifically can be 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 CNT aligns along same direction in the said orderly carbon nano-tube film.Preferably, this first polarizing layer 110 is a CNT membrane structure.The thickness of said the one the first polarizing layers 110 is 1 micron～0.5 millimeter.
Since CNT to absorption of electromagnetic wave near absolute black body; CNT all has the absorption characteristic of homogeneous for the electromagnetic wave of various wavelength, so the ordered carbon nanotube film in said 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, said first polarizing layer 110 comprises the CNT that aligns along same direction, thereby said 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 present technique scheme implementation example can play the effect of polarisation and top electrode simultaneously; Need not extra 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 said first both alignment layers 112 can be polystyrene and derivant thereof, polyimide, polyvinyl alcohol (PVA), polyester, epoxy resin, Polyurethane, polysilane etc.First groove of said first both alignment layers 112 can adopt the film friction method of prior art, inclination vapor deposition 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 said first both alignment layers 112 is a polyimide, and thickness is 1～50 micron.
See also Fig. 3, said 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 said 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 said liquid crystal layer 310 in this infrabasal plate 200.
The material of said second polarizing layer 210 is identical with the material of first polarizing layer 110.The thickness of said second polarizing layer 210 is 1 micron～0.5 millimeter.The light that the acting as of said second polarizing layer 210 will be sent from the LGP that is arranged at touch LCD screen 300 lower surfaces is inclined to one side, thereby obtains along the light of single direction polarization.The polarization direction of said second polarizing layer 210 is vertical with the polarization direction of first polarizing layer 110.
Said second both alignment layers 212 is identical with the material of first both alignment layers 112, and second groove of said second both alignment layers 212 can make liquid crystal molecule align.Because first groove of said 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 said 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 said 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 place row.
Further; Said thin-film transistor display panel 220 can also comprise a display drive circuit (not shown); Said source electrode line 226 is connected with display drive circuit with gate line 228, display drive circuit through source electrode line 226 and gate line 228 control TFT 222 switch.Said display drive circuit is integrated to be arranged on the 3rd matrix 240, forms a surface-mounted integrated circuit.
Said 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 said the 3rd matrix 240 is PET.Said the 3rd matrix 240 also can be selected the printed-wiring board (PWB) in the large scale integrated circuit for use.
Said 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 said pixel electrode 224 is 10 square microns～0.1 square millimeter.In the present embodiment, the material of said pixel electrode 224 is ITO, and area is 0.05 square millimeter.
The material of said gate line 228 and source electrode line 226 is a conductive material, like 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.Said gate line 228 and source electrode line 226 also can be the long line structure of metallic carbon nanotubes.The width of said gate line 228 and source electrode line 226 is 0.5 nanometer～100 micron.In the present embodiment, the material of said gate line 228 and source electrode line 226 is an aluminium, and width is 10 microns.
See also Fig. 6, said 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 through this insulation course 2226 and this semiconductor layer 2220, source electrode 2222 and 2224 insulation that drain.
In the present embodiment, said thin film transistor (TFT) 222 is the bottom gate type structure.Above-mentioned grid 2228 is arranged at said 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 through 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.
Said semiconductor layer 2220 comprises one second carbon nanotube layer.Comprise a plurality of CNTs in this second carbon nanotube layer.This CNT is the semiconductive carbon nano tube of single wall or double-walled.The diameter of the semiconductive carbon nano tube of said single wall is 0.5 nanometer～50 nanometers; The diameter of the semiconductive carbon nano tube of said double-walled is 1.0 nanometers～50 nanometers.Preferably, the diameter of said semiconductive carbon nano tube is less than 10 nanometers.The length of said semiconductor layer 2220 is 1 micron～100 microns, and width is 1 micron～1 millimeter, and thickness is 0.5 nanometer～100 micron.
Particularly, said second carbon nanotube layer can comprise unordered or orderly carbon nano-tube film.In the unordered carbon nano-tube film, CNT is unordered or isotropy is arranged.The CNT of this lack of alignment twines each other, and this isotropy carbon nanotubes arranged is parallel to the surface of carbon nano-tube film.In the orderly carbon nano-tube film, CNT is for being arranged of preferred orient or along the different directions preferred orientation along same direction.Preferably, this second carbon nanotube layer comprises the orderly long carbon nano-tube thin-film structure that one deck at least is made up of long CNT.As shown in Figure 7, the CNT in this long carbon nano-tube thin-film structure is parallel to each other and is arranged side by side, and combines closely through Van der Waals force between adjacent two CNTs.At this moment, the length of this second carbon nanotube layer equals the length of CNT 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, the CNT in the adjacent carbon nano-tube film forms an angle, and 0 °≤α≤90 °.Preferably, the CNT in said second carbon nanotube layer is all arranged along source electrode to the drain directions of thin film transistor (TFT).
In the present technique scheme implementation example, said semiconductor layer 2220 comprises the ordered carbon nanotube film that one deck is made up of long CNT, and the length of this semiconductor layer is 50 microns, and width is 300 microns, and thickness is 5 nanometers.Said semiconductor layer 2220 forms a raceway groove at said source electrode 2222 and the zone that drains between 2224.The length of said raceway groove is 5 microns, and width is 40～100 microns.Two ends of said CNT 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 through said 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 through 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 said infrabasal plate 200.This touch screen controller 30 is located the input of selection information through 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 through 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, through 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 through measuring change in voltage and the change in voltage on second conductive layer, 142 second directions on first conductive layer, 122 first 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 through display controller 60 control TFT panels 220 carries out image and shows.
The CNT that present technique scheme implementation example provides has the following advantages as the touch LCD screen of the transparency conducting layer and first polarizing layer: one of which; Because the touch-screen of employing CNT 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.Its two, the mechanical characteristic of the excellence of CNT 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 CNT 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 CNT has excellent electric conductivity; The carbon nanotube layer of then being made up of CNT has uniform resistance and distributes, 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 extra 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 CNT 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, these all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.
Claims (21)
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; This second carbon nanotube layer comprises a plurality of CNTs, and this first carbon nanotube layer comprises at least one ordered carbon nanotube film, and this ordered carbon nanotube film comprises CNT membrane structure; This CNT membrane structure has preferably self-supporting property and comprises that a plurality of CNTs join end to end through Van der Waals force and be arranged of preferred orient along same direction, combines through Van der Waals force between these a plurality of CNTs.
2. touch LCD screen as claimed in claim 1 is characterized in that, the CNT in said second carbon nanotube layer is a semiconductive carbon nano tube.
3. touch LCD screen as claimed in claim 2 is characterized in that, said semiconductive carbon nano tube is SWCN 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 CNT in said first carbon nanotube layer is a metallic carbon nanotubes.
5. touch LCD screen as claimed in claim 4; It is characterized in that; Said metallic carbon nanotubes is SWCN, double-walled carbon nano-tube or multi-walled carbon nano-tubes; The diameter of this SWCN is 0.5 nanometer～50 nanometers, and 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 is characterized in that, said second carbon nanotube layer comprises 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 said carbon nano-tube film comprises the disordered carbon nano-tube film, and this disordered carbon nano-tube film comprises a plurality of CNT lack of alignment or isotropy arrangement.
8. touch LCD screen as claimed in claim 7 is characterized in that, the CNT in the said disordered carbon nano-tube film twines each other or is parallel to the carbon nano-tube film surface.
9. touch LCD screen as claimed in claim 6; It is characterized in that; Said carbon nano-tube film comprises orderly carbon nano-tube film, and this ordered carbon nanotube film comprises that a plurality of CNTs 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 1; It is characterized in that; Said first carbon nanotube layer comprises the CNT membrane structure of at least two overlapping settings, and the CNT in the adjacent two-layer CNT membrane structure forms an angle, and 0 °≤α≤90 °.
11. touch LCD screen as claimed in claim 1 is characterized in that, said ordered carbon nanotube film comprises a plurality of long CNTs that are parallel to each other and are arranged side by side.
12. touch LCD screen as claimed in claim 1 is characterized in that, the thickness of said first carbon nanotube layer is 0.5 nanometer～100 micron.
13. touch LCD screen as claimed in claim 1 is characterized in that, said first carbon nanotube layer is a CNT composite bed, and it comprises that at least one ordered carbon nanotube film and macromolecular material are uniformly distributed in the ordered carbon nanotube film.
14. touch LCD screen as claimed in claim 1; It is characterized in that; Said 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, and 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 this second conductive layer along second direction, and this second direction is perpendicular to first direction, and this first conductive layer and second conductive layer include one first carbon nanotube layer;
It is peripheral that one insulation course, this insulation course are arranged on this second battery lead plate upper surface, this first battery lead plate be arranged on this insulation course with said second battery lead plate at interval; And
A plurality of point-like spacers are arranged between said first battery lead plate and said second battery lead plate.
15. touch LCD screen as claimed in claim 14 is characterized in that, the thickness of said first conductive layer and second conductive layer is 0.5 nanometer～100 micron.
16. touch LCD screen as claimed in claim 14 is characterized in that, the CNT in said first conductive layer aligns along first direction, and the CNT in said second conductive layer aligns along second direction.
17. touch LCD screen as claimed in claim 1 is characterized in that, said 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 said liquid crystal layer setting.
18. touch LCD screen as claimed in claim 1 is characterized in that, said 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, and this source electrode is electrically connected with the one source pole line, and 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 through an insulation course.
19. touch LCD screen as claimed in claim 1 is characterized in that, said 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 said liquid crystal layer setting.
20., it is characterized in that said polarizing layer comprises that a plurality of CNTs are arranged of preferred orient along same direction like claim 17 or 19 described touch LCD screens.
21., it is characterized in that the thickness of said polarizing layer is 1 micron～0.5 millimeter like claim 17 or 19 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 |
| US12/583,161 US8237679B2 (en) | 2008-07-04 | 2009-08-13 | Liquid crystal display screen |
| US12/583,162 US8237680B2 (en) | 2008-07-04 | 2009-08-13 | Touch panel |
| US12/584,410 US8199123B2 (en) | 2008-07-04 | 2009-09-03 | Method for making liquid crystal display screen |
| US12/584,415 US8105126B2 (en) | 2008-07-04 | 2009-09-03 | Method for fabricating touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100683173A CN101620328B (en) | 2008-07-04 | 2008-07-04 | Touch LCD screen |
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| CN101620328A CN101620328A (en) | 2010-01-06 |
| CN101620328B true CN101620328B (en) | 2012-07-18 |
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| CN2008100683173A Active CN101620328B (en) | 2008-07-04 | 2008-07-04 | Touch LCD screen |
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| 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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| KR20180082636A (en) | 2010-04-28 | 2018-07-18 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Display device |
| CN102221949A (en) * | 2011-05-12 | 2011-10-19 | 信利半导体有限公司 | Capacitance touch screen and manufacture method thereof |
| KR102026111B1 (en) * | 2011-10-24 | 2019-09-30 | 엘지디스플레이 주식회사 | touch panel and method of manufacturing of 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 |
| CN105609636B (en) * | 2016-02-17 | 2018-05-08 | 上海交通大学 | Directional single-wall carbon nanotube array is the field-effect transistor and production method of raceway groove |
| CN106019449A (en) * | 2016-05-27 | 2016-10-12 | 京东方科技集团股份有限公司 | Polarizing film layer, display device and manufacturing method thereof |
| CN114660883B (en) * | 2020-12-22 | 2024-03-19 | 宁波激智科技股份有限公司 | Environment-light-resistant laser television screen and preparation method thereof |
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| JP2010015153A (en) | 2010-01-21 |
| CN101620328A (en) | 2010-01-06 |
| JP5415849B2 (en) | 2014-02-12 |
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