CN102914900B - Display screen and display device - Google Patents
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- CN102914900B CN102914900B CN201110222438.0A CN201110222438A CN102914900B CN 102914900 B CN102914900 B CN 102914900B CN 201110222438 A CN201110222438 A CN 201110222438A CN 102914900 B CN102914900 B CN 102914900B
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Abstract
The invention provides a display screen, which comprises an optical film, wherein the first optical film is arranged on a path of a ray emitted by a backlight source of the display screen; the light transmittance of the first optical film to a visible light with a long wavelength is higher than that to the visible light with a short wavelength; the display screen further comprises a chromatic improvement layer; the chromatic improvement layer is arranged on the path of the ray emitted by the backlight source of the display screen, and the light transmittance of the chromatic improvement layer to the visible light with the short wavelength is higher than that to the visible light with the long wavelength. The invention also relates to a display device.
Description
Technical field
The present invention relates to a kind of display screen and display device, particularly relate to a kind of display screen and display device of low colour cast.
Background technology
Refer to Fig. 1, display device 100 of the prior art generally comprises touch-screen 11, touch screen controller 12, central processing unit 13, display screen 15 and a displaying screen controller 14.Wherein, described display screen 15 just to and near the stacked setting of touch-screen 11; Described touch-screen 11 is electrically connected with described touch screen controller 12; Described display screen 15 is electrically connected with described displaying screen controller 14; Described touch screen controller 12, central processing unit 13 and displaying screen controller 14 three are interconnected by circuit.Described touch-screen 11 can be a resistive touch screen or a capacitive touch screen.This resistive touch screen or capacitive touch screen can comprise a transparent carbon nanotube layer as the transparency conducting layer of this resistive touch screen or capacitive touch screen or screen layer.Described display screen 15 can be a LCDs.This LCDs can comprise a transparent carbon nanotube layer as the both alignment layers of this LCDs, transparent electrode layer or polaroid.
Further, in use, user, by described touch-screen 11, carries out visual confirmation to the displaying contents of the display screen 15 being positioned at touch-screen 11 back side to described display device 100, operates while utilize the modes such as finger or pen to press touch-screen 11.Thus, can the various functions of operating electronic equipment.
So, described display device 100 in use, when light passes through the blooming piece in described touch-screen 11 or display screen 15, because this blooming piece has different transmittances to the visible ray of different wave length, the touch-screen 11 or the display screen 15 that comprise this blooming piece described in making produce certain colour cast, and the color causing this display device 100 produces distortion.Such as: when light passes through the transparent carbon nanotube layer in described touch-screen 11 or display screen 15, because this transparent carbon nanotube layer has different transmittances to the visible ray of different wave length, namely, this transparent carbon nanotube layer can lower than the transmittance of the visible ray to long wavelength to the transmittance of the visible ray of short wavelength, now, the touch-screen 11 or the display screen 15 that comprise carbon nanotube layer described in making produce certain colour cast, the color causing this display device 100 produces distortion, and then affects appreciation effect.
Summary of the invention
In view of this, necessary display screen and the display device that a kind of low colour cast is provided.
A kind of display screen, comprise one first blooming piece, on the path that the backlight that described first blooming piece is arranged on described display screen emits beam, described first blooming piece is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength, wherein, described display screen comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display screen emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray of long wavelength.
A kind of display device, it comprises a display screen, this display screen comprises at least one blooming piece, on the path that the backlight that described blooming piece is arranged on described display device emits beam, described blooming piece is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength, wherein, described display device comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display device emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray of long wavelength.
A kind of display screen, comprise at least one blooming piece, on the path that the backlight that described blooming piece is arranged at described display screen emits beam, described blooming piece is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray of long wavelength, wherein, described display screen comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display screen emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength.
A kind of display device, it comprises a display screen, this display screen comprises at least one blooming piece, on the path that the backlight that described blooming piece is arranged at described display device emits beam, described blooming piece makes the transmittance of the visible ray of short wavelength higher than the transmittance of the visible ray of long wavelength, wherein, described display device comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display device emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength.
Compared with the display screen of prior art and display device, display screen provided by the invention and display device, by arranging a color bias improvement layer, significantly can reduce the colour cast that described display screen and display device produce, thus obtain good image quality and appreciation effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of display device of the prior art.
Fig. 2 is the structural representation of the display device that first embodiment of the invention provides.
Fig. 3 is the front view of touch-screen in the display device that provides of first embodiment of the invention.
Fig. 4 is the vertical view of touch-screen in the display device that provides of first embodiment of the invention.
Fig. 5 is the stereoscan photograph of the carbon nano-tube membrane that in the display device that provides of first embodiment of the invention, touch-screen uses.
Fig. 6 is the schematic diagram of the process of the carbon nano-tube membrane pulled from carbon nano pipe array as shown in Figure 5.
Fig. 7 is the structural representation of display screen in the display device that provides of first embodiment of the invention.
Fig. 8 is the structural representation of the display device that second embodiment of the invention provides.
Fig. 9 is the structural representation of display screen in the display device that provides of second embodiment of the invention.
Figure 10 is the sectional view that in display device second embodiment of the invention provided along the line X-X in Fig. 9, display screen is cut open.
Main element symbol description
| Display device | 200、300 |
| Touch screen controller | 12 |
| Central processing unit | 13 |
| Displaying screen controller | 14 |
| Touch-screen | 11、20、50 |
| Substrate | 22 |
| First surface | 221 |
| Second surface | 222 |
| Transparency conducting layer | 24 |
| Screen layer | 25 |
| Electrode | 28a、28b、28c、28d |
| Display screen | 15、30、60 |
| First matrix | 31 |
| First transparent electrode layer | 32 |
| First both alignment layers | 33 |
| Liquid crystal molecule | 352 |
| First groove | 332 |
| First polaroid | 34 |
| Liquid crystal layer | 35 |
| Second matrix | 36 |
| Second transparent electrode layer | 37 |
| Second both alignment layers | 38、62 |
| Second groove | 382、626 |
| Second polaroid | 39 |
| Color bias improvement layer | 40 |
| Passivation layer | 104 |
| Gap | 106 |
| Supporter | 108 |
| First transparent carbon nanotube layer | 622 |
| Fixed bed | 624 |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 2, first embodiment of the invention provides a kind of display device 200.Described display device 200 comprises touch-screen 20, display screen 30, color bias improvement layer 40, touch screen controller 12, central processing unit 13 and a displaying screen controller 14.
Described color bias improvement layer 40, touch-screen 20 and display screen 30 are cascading, and form a layer structure.Described touch-screen 20 is electrically connected with described touch screen controller 12; Described display screen 30 is electrically connected with described displaying screen controller 14; Described touch screen controller 12, central processing unit 13 and displaying screen controller 14 three are interconnected by circuit.
Described display screen 30 and touch-screen 20 can be arranged or integrated setting by interval one preset distance.Further, when display screen 30 and touch-screen 20 keep at a certain distance away arrange time, can arrange a passivation layer 104 at touch-screen 20 on a surface of display screen 30, this passivation layer 104 can be formed by flexible materials such as benzocyclobutene (BCB), polyester or acryl resins.This display screen 30 and gap, described passivation layer 104 interval one 106 are arranged.Particularly, two supporters 108 are set between described passivation layer 104 and display screen 30.This passivation layer 104 can be used as dielectric layer and uses, and described passivation layer 104 and gap 106 can protect display screen 30 to be unlikely because external force is excessive and damage.When display screen 30 is arranged with touch-screen 20 is integrated, the Contact of touch-screen 20 and display screen 30 is arranged.Described passivation layer 104 is seamlessly arranged on the surface of display screen 30.
Described touch-screen 20 can be a capacitive touch screen or resistive touch screen.In the present embodiment, described touch-screen 20 is a capacitive touch screen.Refer to Fig. 3 and Fig. 4, described touch-screen 20 comprises substrate 22, transparency conducting layer 24 and a multiple electrode.
Described substrate 22 has a first surface 221 and the second surface 222 relative with this first surface 221.Described first surface 221 is user oriented side, and described second surface 222 is the side of user dorsad.Described substrate 22 is the insulating transparent substrate of a curved face type or plane.This substrate 22 is formed by the hard materials such as glass, quartz, adamas or plastics or flexible material.In the present embodiment, this substrate 22 is a glass substrate, and this substrate 22 mainly plays a supportive role.
Described transparency conducting layer 24 is arranged at the first surface 221 of described substrate 22, for sensing extraneous touch.Described transparency conducting layer 24 can be an indium tin oxide layer or transparent carbon nanotube layer.In the present embodiment, described transparency conducting layer 24 is a transparent carbon nanotube layer, and this transparent carbon nanotube layer comprises multiple carbon nano-tube.Further, described transparent carbon nanotube layer can be the carbon nano-tube film of Single Carbon Nanotubes film or multiple stacked setting, therefore, the thickness of described transparent carbon nanotube layer is not also limit, as long as desirable transparency can be had, the transparent carbon nanotube layer with any thickness can be made according to actual needs.Because described transparent carbon nanotube layer is different to the transmittance of the visible ray of different frequency, therefore, when this transparent carbon nanotube layer of light penetration, certain colour cast can be produced.The colour cast of described transparent carbon nanotube layer is relevant with its thickness.The thickness defining described transparent carbon nanotube layer is A
1micron.
Carbon nano-tube film in described transparent carbon nanotube layer is made up of orderly or unordered carbon nano-tube, and this carbon nano-tube film has uniform thickness.Particularly, this transparent carbon nanotube layer comprises unordered carbon nano-tube film or orderly carbon nano-tube film.In unordered carbon nano-tube film, carbon nano-tube is unordered or isotropy arrangement.The carbon nano-tube of this lack of alignment is wound around mutually, and the carbon nano-tube of this isotropy arrangement is parallel to the surface of carbon nano-tube film.In orderly carbon nano-tube film, carbon nano-tube is for being arranged of preferred orient in the same direction or being arranged of preferred orient along different directions.When transparent carbon nanotube layer comprises the carbon nano-tube film of multilayer order, this multilayer carbon nanotube film can along the stacked setting of any direction, therefore in this transparent carbon nanotube layer, carbon nano-tube is for be arranged of preferred orient along identical or different direction.
Refer to Fig. 5, in the present embodiment, described transparent carbon nanotube layer comprises one deck carbon nano-tube membrane, the carbon nano-tube ordered arrangement in this carbon nano-tube membrane.Concrete, described carbon nano-tube membrane comprises multiple carbon nano-tube bundle fragment, each carbon nano-tube bundle fragment has roughly equal length and each carbon nano-tube bundle fragment is made up of multiple carbon nano-tube bundle be parallel to each other, and carbon nano-tube bundle fragment two ends are interconnected by Van der Waals force.There is gap between multiple carbon nano-tube bundle in described carbon nano-tube membrane and multiple carbon nano-tube, therefore above-mentioned transparent carbon nanotube layer has multiple parallel and equally distributed gap.
The thickness of described carbon nano-tube membrane is preferably 0.5 nanometer ~ 100 micron, and width is 0.01 centimetre ~ 10 centimetres.In the present embodiment, the thickness of this carbon nano-tube membrane is 0.3 micron.Described carbon nano-tube comprises Single Walled Carbon Nanotube, double-walled carbon nano-tube and multi-walled carbon nano-tubes.The diameter of described Single Walled Carbon Nanotube is 0.5 nanometer ~ 50 nanometer, and the diameter of double-walled carbon nano-tube is 1 nanometer ~ 50 nanometer, and the diameter of multi-walled carbon nano-tubes is 1.5 nanometer ~ 50 nanometers.The preparation method of the carbon nano-tube membrane in the present embodiment, mainly comprises the following steps:
Step one: provide a carbon nano pipe array, preferably, this carbon nano-pipe array is classified as super in-line arrangement carbon nano pipe array.
The carbon nano-pipe array that the present embodiment provides is classified as single-wall carbon nanotube array, double-walled carbon nano-tube array or array of multi-walled carbon nanotubes.The preparation method of described super in-line arrangement carbon nano pipe array adopts chemical vapour deposition technique, its concrete steps comprise: (a) provides a smooth substrate, this substrate can select P type or N-type silicon base, or selects the silicon base being formed with oxide layer, and the present embodiment is preferably the silicon base of employing 4 inches; B () evenly forms a catalyst layer at substrate surface, this catalyst layer material can select one of alloy of iron (Fe), cobalt (Co), nickel (Ni) or its combination in any; C the described substrate being formed with catalyst layer is annealed about 30 minutes ~ 90 minutes by () in the air of 700 ° of C ~ 900 ° C; D the substrate processed is placed in reacting furnace by (), be heated to 500 ° of C ~ 740 ° C under protective gas, and then pass into carbon-source gas reaction about 5 ~ 30 minutes, growth obtains super in-line arrangement carbon nano pipe array, and it is highly 200 ~ 400 microns.This super in-line arrangement carbon nano-pipe array is classified as multiple parallel to each other and pure nano-carbon tube array that is that formed perpendicular to the carbon nano-tube of substrate grown.By controlling growth conditions, substantially not containing impurity in this super in-line arrangement carbon nano pipe array, as agraphitic carbon or residual catalyst metal particles etc.Carbon nano-tube in this carbon nano pipe array forms array each other by Van der Waals force close contact.
The hydrocarbon that carbon source gas in the present embodiment can select the chemical property such as acetylene, ethene, methane more active, the preferred carbon source gas of the present embodiment is acetylene; Blanket gas is nitrogen or inert gas, and the preferred blanket gas of the present embodiment is argon gas.
Be appreciated that the preparation method of described carbon nano pipe array is not limited to the preparation method described in the present embodiment.Also can be graphite electrode Constant Electric Current arc discharge sedimentation, laser evaporation sedimentation etc.
Step 2: adopt a stretching tool to pull from carbon nano pipe array and obtain a carbon nano-tube membrane.It specifically comprises the following steps: (a) selectes multiple carbon nano-tube segments of one fixed width from described carbon nano pipe array, and the present embodiment is preferably and adopts the adhesive strips contact carbon nano pipe array with one fixed width with multiple carbon nano-tube segments of selected one fixed width; B () to stretch the plurality of carbon nano-tube segment, to form a continuous print carbon nano-tube membrane along being basically perpendicular to the carbon nano pipe array direction of growth with certain speed.
Refer to Fig. 6, in described drawing process, while the plurality of carbon nano-tube fragment departs from substrate gradually along draw direction under a stretching force, due to van der Waals interaction, these selected multiple carbon nano-tube segments are drawn out end to end continuously with other carbon nano-tube segment respectively, thus form a carbon nano-tube membrane.
This carbon nano-tube membrane be the multiple carbon nano-tube bundles be arranged of preferred orient join end to end formed the carbon nano-tube membrane with one fixed width.In this carbon nano-tube membrane, the orientation of carbon nano-tube is basically parallel to the draw direction of carbon nano-tube membrane.This uniaxial direct tensile obtain carbon nano-tube membrane than unordered carbon nano-tube film, there is better homogeneity, namely have evenly thickness and evenly electric conductivity.The method of the carbon nano-tube of this uniaxial direct tensile acquisition simultaneously membrane is simple and quick, is suitable for carrying out industrial applications.The size of the substrate that width and the carbon nano pipe array of this carbon nano-tube membrane grow is relevant, and the length of this carbon nano-tube membrane is not limit, and can obtain according to the actual requirements.
Described multiple electrode is arranged on the surface of transparency conducting layer 24.The plurality of electrode respectively interval is arranged, and is formed with described transparency conducting layer 24 and be electrically connected, in order to form equipotential plane on described transparency conducting layer 24.The material of the plurality of electrode is metal.Described multiple electrode can adopt the deposition processs such as sputtering, plating, electroless plating to be deposited directly to the surface of described transparency conducting layer 24.Also can with conductive adhesives such as elargol by the surface of the plurality of electrode adhesion at described transparency conducting layer 24.In the present embodiment, described touch-screen 20 comprises four electrodes 28a, 28b, 28c and 28d.These four electrodes 28a, 28b, 28c and 28d are arranged on four angles of described transparency conducting layer 24 respectively, and are electrically connected with described transparency conducting layer 24, in order to form equipotential plane on transparency conducting layer 24.
Described color bias improvement layer 40 is arranged at the described user oriented side of transparency conducting layer 24, and described transparency conducting layer 24 is held between described substrate 22 and described color bias improvement layer 40.The material of described color bias improvement layer 40 can be TiO
2, ZrO
2, Nb
2o
5, Ta
2o
5, Al
2o
3, SiO
2, CeO
2, HfO
2, ZnS and MgF
2deng dielectric material.The preparation technology of described color bias improvement layer 40 comprises: vacuum evaporation, sputter, slit type coating (Slot Die), spin coating (Spin-coating) or dipping (Dipping).
Please refer to Fig. 7, described display screen 30 is a LCDs, and it comprises one first polaroid 34, first matrix 31,1 first transparent electrode layer 32,1 first both alignment layers 33, liquid crystal layer 35,1 second both alignment layers 38,1 second transparent electrode layer 37,1 second matrix 36 and one second polaroid 39 successively.
Described first matrix 31 is oppositely arranged with described second matrix 36, and this first matrix 31 and main of the second matrix 36 support used.Described liquid crystal layer 35 is arranged between described first matrix 31 and described second matrix 36.This liquid crystal layer 35 comprises the bar-shaped liquid crystal molecule of multiple length 352.Described first transparent electrode layer 32 is arranged at described first matrix 31 near the surface of liquid crystal layer 35.Described first both alignment layers 33 is arranged at described first transparent electrode layer 32 near the surface of liquid crystal layer 35, and the first both alignment layers 33 comprises multiple the first parallel groove 332 near the surface of liquid crystal layer 35.Described second transparent electrode layer 37 is arranged at described second matrix 36 near the surface of liquid crystal layer 35.Described second both alignment layers 38 is arranged at described second transparent electrode layer 37 near the surface of liquid crystal layer 35, and the second both alignment layers 38 comprises multiple the second parallel groove 382 near the surface of liquid crystal layer 35.Described second groove 382 orientation is mutually vertical with the first groove 332 orientation, thus can carry out orientation to the liquid crystal molecule 352 in liquid crystal layer 35.Described first polaroid 34 is arranged at the surface of described first matrix 31 away from liquid crystal layer 35, described second polaroid 39 is arranged at the surface of described second matrix 36 away from liquid crystal layer 35, and described first polaroid 34 can carry out polarization to light with described second polaroid 39.Described first polaroid 34 and the second polaroid 39 are polaroid conventional in prior art.
The material of described first matrix 31 and the second matrix 36 can be rigid or flexible transparent material, as glass, quartz, adamas or plastics etc.In the present embodiment, the material of described first matrix 31 and the second matrix 36 is the flexible materials such as cellulose triacetate (cellulose triacetate, CTA).Described liquid crystal molecule 352 is liquid crystal material conventional in prior art.The material of described first transparent electrode layer 32 and the second transparent electrode layer 37 is a transparent conductive film of In-Sn oxide (ITO).The material of described first both alignment layers 33 and the second both alignment layers 38 is a macromolecule polyimide film.This macromolecule polyimide film is through methods such as rubbing manipulation and inclination evaporation SiOx embrane methods, form multiple groove in described first both alignment layers 33 and the second both alignment layers 38 respectively near the surface of liquid crystal layer 35, the plurality of groove can form described first groove 332 and the second groove 382.
First transparent electrode layer 32, first both alignment layers 33, first polaroid 34, second transparent electrode layer 37, second both alignment layers 38 of described display screen 30 and the second polaroid 39 also can be a transparent carbon nanotube layer.Described transparent carbon nanotube layer can be selected from the transparent carbon nanotube layer in touch-screen 20.In the present embodiment, described display screen 30 does not comprise a transparent carbon nanotube layer, therefore this display screen 30 can not produce colour cast.
Colour cast due to described display device 200 is mainly caused by the transmittance difference of the transparent carbon nanotube layer in touch-screen 20 to the visible ray of different wave length.That is, this transparent carbon nanotube layer is to the transmittance of the transmittance of the visible ray of short wavelength lower than the visible ray to long wavelength, thus makes this touch-screen 20 produce certain colour cast, and then affects the appreciation effect of described display device 200.Therefore, can by arranging one to the transmittance of the visible ray of the short wavelength color bias improvement layer 40 higher than the transmittance of the visible ray of long wavelength, make the visible ray of whole display device 200 pairs of different wave lengths have roughly equal transmittance, thus improve the appreciation effect of described display device 200.The colour cast of display device can represent according to the international standard Lab test value that the council (CIE) color space standards tests this display device obtained that throws light on, wherein, and a
*represent the green red value of this display device, b
*represent the yellow value of the indigo plant of this display device.In field of display, wish this
*with b
*absolute value be all less than 2, that is, this display device produce colour cast lower.Preferably, a of this display device
*value and b
*value is equal to zero, that is, this display device does not produce colour cast.
The left hurdle of table one is the Lab test value testing one group of (five) touch-screen 20 obtained according to the international standard illumination council (CIE) color space standards.Therefrom can find out, a of described touch-screen 20
*the absolute value of value is all less than 2, therefore, a of this touch-screen 20
*value meets the demands substantially, does not therefore need its a
*value is improved; And, the b of described touch-screen 20
*the absolute value of value is greater than 2, therefore this touch-screen 20 can be made to produce larger colour cast, and then affects image quality and the appreciation effect of this display device 200.The b of this touch-screen 20
*be worth the thickness A with the transparent carbon nanotube layer in described touch-screen 20
1relevant.Therefore, need the colour cast of correcting described touch-screen 20 by arranging described color bias improvement layer 40, and then reduce the b of whole display device 200
*the absolute value of value, makes its b
*the absolute value of value is less than 2, preferably, makes its b
*value levels off to zero.
Be appreciated that because the transmittance of the visible ray of described color bias improvement layer 40 couples of short wavelength is higher than the transmittance of the visible ray of long wavelength, therefore this color bias improvement layer 40 also have certain colour cast.The colour cast of this color bias improvement layer 40 also can be tested the Lab test value obtained and represents according to the international standard council (CIE) color space standards that throws light on.The b of this color bias improvement layer 40
*value can according to the thickness A of the transparent carbon nanotube layer in this transparency conducting layer 24
1determine.The b of this color bias improvement layer 40
*the scope of value is at-16.7 × A
1to-1.67 × A
1.Preferably, the b of this color bias improvement layer 40
*the scope of value is at-10 × A
1to-1.67 × A
1.In the present embodiment, the b of this color bias improvement layer 40
*value is-4 × A
1, and the thickness A of described transparent carbon nanotube layer
1be about 0.3 micron, therefore, the b of this color bias improvement layer 40
*value is about-1.2.
Table one
Refer to table one intermediate hurdles, table one intermediate hurdles are for testing the Lab test value of touch-screen 20 described in a group that obtains after being improved by described color bias improvement layer 40 according to the international standard illumination council (CIE) color space standards.After improvement, a in described touch-screen 20
*mean value be reduced to-0.30, a by 0.07
*the changing value of value is about-0.37, that is, a of this touch-screen 20
*value remains unchanged substantially.And, b in described touch-screen 20
*mean value be reduced to 1.01, b by 2.44
*the changing value of value is about-1.43.That is, this b
*the b of color bias improvement layer 40 in the changing value of value and the present embodiment
*value-1.2 is suitable.Therefore, being appreciated that can by the b of described color bias improvement layer 40
*the b of value to the transparent carbon nanotube layer in described transparency conducting layer 24
*value is corrected, thus can make the b of described display device 200
*value is reduced significantly, thus the colour cast of this display device 200 can be made to be reduced significantly.
Described color bias improvement layer 40 can be arranged on the described user oriented side of transparency conducting layer 24, also can be arranged on described touch-screen 20 inner, or be arranged on the inside of described display screen 30.Such as, first surface 221 or the second surface 222 of described substrate 22 is arranged on; Such as, or it is inner to be arranged on described display screen 30, is arranged on the surface of described first matrix 31 or the second matrix 36.Be appreciated that the position of described color bias improvement layer 40 is not limit, as long as be arranged at the path that light that in described display device 200, backlight sends passes through, make the light of this display device 200 pairs of different wave lengths have roughly equal transmittance.In the present embodiment, described color bias improvement layer 40 is pair of lamina SiO
2layer, this double-deck SiO
2layer is prepared from by infusion process.
In addition, in order to reduce display screen, electromagnetic interference (EMI) being produced to touch-screen 20, a screen layer 25 can also be set on the second surface 222 of substrate 22, thus described substrate 22 is held between described transparency conducting layer 24 and screen layer 25.This screen layer 25 can be formed by the transparent conductive material such as conducting polymer or carbon nano-tube.In the present embodiment, this screen layer 25 is made up of a transparent transparent carbon nanotube layer.This transparent transparent carbon nanotube layer can be carbon nano-tube film that is that align or other structure.In the present embodiment, this carbon nano-tube film is a carbon nano-tube membrane, and this carbon nano-tube membrane comprises multiple carbon nano-tube, and described multiple carbon nano-tube aligns in described carbon nano-tube membrane, and its concrete structure can be identical with transparency conducting layer 24.This carbon nano-tube film, as point electrical ground, plays the effect of shielding, thus touch-screen 20 can be worked in glitch-free environment.The thickness defining transparent carbon nanotube layer in this screen layer 25 is A
2.
Be appreciated that when described touch-screen 20 comprises a transparent carbon nanotube layer further as screen layer, the b of this color bias improvement layer 40
*value can according to the thickness A of the transparent carbon nanotube layer in this transparency conducting layer 24
1and the thickness A of transparent carbon nanotube layer in this screen layer 25
2determine.The b of this color bias improvement layer 40
*the scope of value is at-16.7 × (A
1+ A
2) to-1.67 × (A
1+ A
2).Preferably, the b of this color bias improvement layer 40
*the scope of value is at-10 × (A
1+ A
2) to-1.67 × (A
1+ A
2).
Refer to Fig. 8, second embodiment of the invention provides a kind of display device 300.Described display device 300 comprises: comprise touch-screen 50, display screen 60, color bias improvement layer 40, touch screen controller 12, central processing unit 13 and a displaying screen controller 14.
Described touch-screen 50 is substantially identical with the touch-screen 20 in first embodiment of the invention, and difference is, the transparency conducting layer in described touch-screen 50 is an indium tin oxide layer.That is, described touch-screen 50 does not comprise a transparent carbon nanotube layer, therefore this touch-screen 50 can not produce colour cast.
Described display screen 60 is substantially identical with the display screen 30 in first embodiment of the invention, and difference is, described display screen 60 comprises a transparent carbon nanotube layer.Be appreciated that, described display screen 60 also can contain the display screen of described transparent carbon nanotube layer for other, as: Field Emission Display, plasma display, electroluminescent display, vacuum fluorescent display, cathode-ray tube (CRT), flexible liquid crystal display, flexible electrophoretic display and flexible organic electro-luminescence display etc.
Refer to Fig. 9 and Figure 10, described display screen 60 comprises successively: one first polaroid 34, first matrix 31,1 first transparent electrode layer 32,1 first both alignment layers 33, liquid crystal layer 35,1 second both alignment layers 62,1 second matrix 36,1 second polaroid 39.
Described second both alignment layers 62 is arranged at described second matrix 36 near the surface of liquid crystal layer 35, and the second both alignment layers 62 comprises multiple the second parallel groove 626 near the surface of liquid crystal layer 35.Second groove 626 orientation of described second both alignment layers 62 is vertical with the orientation of the first groove 332 of the first both alignment layers 33, thus can carry out orientation to the liquid crystal molecule in liquid crystal layer 35.Described second both alignment layers 62 comprises one first transparent carbon nanotube layer 622, fixed bed 624 and multiple second groove 626.Described fixed bed 624 is arranged at described first transparent carbon nanotube layer 622 near the surface of liquid crystal layer 35.Described first transparent carbon nanotube layer 622 can be selected from the transparent carbon nanotube layer in first embodiment of the invention.The thickness defining described first transparent carbon nanotube layer 622 is A
3.
Because described first transparent carbon nanotube layer 622 to have multiple parallel and equally distributed gap near the surface of liquid crystal layer 35, therefore, described fixed bed 624 is covered in described first transparent carbon nanotube layer 622 when liquid crystal layer 35 surperficial, to form multiple parallel and equally distributed groove respectively at described first transparent carbon nanotube layer 622 near the surface of liquid crystal layer 35.This groove can be used as the second groove 626 of described second both alignment layers 62.
Be appreciated that because the second both alignment layers 62 in described display screen 60 comprises one first transparent carbon nanotube layer 622, therefore, when light passes the first transparent carbon nanotube layer 622 in described second both alignment layers 62, certain colour cast can be produced.Now, the colour cast of described display screen 60 generation can be improved by described color bias improvement layer 40, thus reduce the colour cast of described display device 400.The b of this color bias improvement layer 40
*value can according to the thickness A of this first transparent carbon nanotube layer 622
3determine.The b of this color bias improvement layer 40
*the scope of value is at-16.7 × A
3to-1.67 × A
3.Preferably, the b of this color bias improvement layer 40
*the scope of value is at-10 × A
3to-1.67 × A
3.
In addition, described display screen 60 can comprise one second transparent carbon nanotube layer further.Described second transparent carbon nanotube layer can be selected from the transparent carbon nanotube layer in first embodiment of the invention touch-screen 20.Described second transparent carbon nanotube layer can be used as the first transparent electrode layer 32, first both alignment layers 33, first polaroid 34 or the second polaroid 39 of described second transparent carbon nanotube layer.The thickness defining described second transparent carbon nanotube layer is A
4.Be appreciated that when described display screen 60 comprises one second transparent carbon nanotube layer further, the b of this color bias improvement layer 40
*value can according to the thickness A of this first transparent carbon nanotube layer
3and the thickness A of this second transparent carbon nanotube layer
4determine.The b of this color bias improvement layer 40
*the scope of value is at-16.7 × (A
3+ A
4) to-1.67 × (A
3+ A
4).Preferably, the b of this color bias improvement layer 40
*the scope of value is at-10 × (A
3+ A
4) to-1.67 × (A
3+ A
4).
When described display screen 60 is used alone, that is, described display device 300 does not comprise described touch-screen 50 and described touch screen controller 12.Due to the existence of transparent carbon nanotube layer, this display screen 60 can produce certain colour cast.Now, the colour cast of described display screen 60 also can be improved by arranging a color bias improvement layer 40.The b of this color bias improvement layer 40
*value can be determined according to the thickness of transparent carbon nanotube layer in this display screen 60.The position of described color bias improvement layer 40 is not limit, as long as be arranged at the path that light that in described display screen 60, backlight sends passes through, thus makes the light of this display screen 60 pairs of different wave lengths have roughly equal transmittance.In addition, in described display screen 60 or display device 300, the generation of colour cast is also not limited to described transparent carbon nanotube layer, other blooming piece in display screen 60 or display device 300, as the blooming piece such as polaroid and both alignment layers the colour cast that produces also can by as described in color bias improvement layer 40 improve.
Be appreciated that because the visible ray of described transparent carbon nanotube layer to different wave length has different transmittances.Therefore this transparent carbon nanotube layer also can be used as a color bias improvement layer.Such as, when a certain blooming piece in described display screen or display device is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray to long wavelength, thus this display screen or display device is made to produce certain colour cast.Now, the colour cast of described display screen or display device can be improved by arranging described transparent carbon nanotube layer, thus make whole display screen or the visible ray of display device to different wave length have roughly equal transmittance, and then improve the appreciation effect of described display screen or display device.
Display device in the embodiment of the present invention and display screen, by arranging a color bias improvement layer in described display device and display screen, significantly can reduce the colour cast of this display device and display screen, obtain good image quality and appreciation effect; In addition, this color bias improvement layer has the features such as the simple cost of manufacture craft is lower, is applicable to industrialization.
In addition, those skilled in the art also can do other changes in spirit of the present invention, when but, these, according to the change done of the present invention's spirit, all should be included within the present invention's scope required for protection.
Claims (13)
1. a display screen, comprise one first blooming piece, on the path that the backlight that described first blooming piece is arranged on described display screen emits beam, described first blooming piece is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength, it is characterized in that, described display screen comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display screen emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray of long wavelength; Described first blooming piece comprises one first transparent carbon nanotube layer, and the thickness of described first transparent carbon nanotube layer is A micron, and the scope of the indigo plant Huang value of described color bias improvement layer is between-16.7 × A to-1.67 × A.
2. display screen as claimed in claim 1, it is characterized in that, described color bias improvement layer material is selected from TiO2, ZrO2, Nb2O5, Ta2O5, Al2O3, SiO2, CeO2, HfO2, ZnS and MgF2.
3. display screen as claimed in claim 2, it is characterized in that, described color bias improvement layer is prepared by vacuum vapour deposition, sputtering method, slit type rubbing method, spin-coating method and infusion process technique.
4. display screen as claimed in claim 1, is characterized in that, the scope of the indigo plant Huang value of described color bias improvement layer is between-10 × A to-1.67 × A.
5. display screen as claimed in claim 1, it is characterized in that, the thickness of described first transparent carbon nanotube layer is 0.3 micron, and the indigo plant Huang value of described color bias improvement layer is for-1.2.
6. display screen as claimed in claim 1, it is characterized in that, described display screen comprises one second blooming piece further, and this second blooming piece is arranged on the path that described display backlight source emits beam, and this second blooming piece comprises one second transparent carbon nanotube layer.
7. display screen as claimed in claim 6, it is characterized in that, the thickness defining described first transparent carbon nanotube layer is A micron, the thickness defining described second transparent carbon nanotube layer is B micron, then, the scope of the indigo plant Huang value of described color bias improvement layer is between-16.7 (A+B) to-1.67 (A+B).
8. a display device, it comprises a display screen, this display screen comprises at least one blooming piece, on the path that the backlight that described blooming piece is arranged on described display device emits beam, described blooming piece is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength, it is characterized in that, described display device comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display device emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray of long wavelength, the thickness of described blooming piece is A micron, the scope of the indigo plant Huang value of described color bias improvement layer is between-16.7 × A to-1.67 × A.
9. display device as claimed in claim 8, it is characterized in that, described display device comprises a touch-screen further, described touch-screen just to and arrange near described display screen, this touch-screen is for controlling the display of described display screen.
10. display device as claimed in claim 9, it is characterized in that, described color bias improvement layer is arranged in described touch-screen or display screen.
11. 1 kinds of display screens, comprise at least one blooming piece, on the path that the backlight that described blooming piece is arranged at described display screen emits beam, described blooming piece is to the transmittance of the transmittance of the visible ray of short wavelength higher than the visible ray of long wavelength, it is characterized in that, described display screen comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display screen emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength; The thickness of described blooming piece is A micron, and the scope of the indigo plant Huang value of described color bias improvement layer is between-16.7 × A to-1.67 × A.
12. display screens as claimed in claim 11, is characterized in that, described color bias improvement layer is a transparent carbon nanotube layer.
13. 1 kinds of display device, it comprises a display screen, this display screen comprises at least one blooming piece, on the path that the backlight that described blooming piece is arranged at described display device emits beam, described blooming piece makes the transmittance of the visible ray of short wavelength higher than the transmittance of the visible ray of long wavelength, it is characterized in that, described display device comprises a color bias improvement layer further, on the path that the backlight that this color bias improvement layer is arranged at described display device emits beam, described color bias improvement layer is to the transmittance of the transmittance of the visible ray of long wavelength higher than the visible ray of short wavelength, the thickness of described blooming piece is A micron, and the scope of the indigo plant Huang value of described color bias improvement layer is between-16.7 × A to-1.67 × A.
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| CN102914900B true CN102914900B (en) | 2015-06-17 |
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| CN1947203A (en) * | 2004-04-20 | 2007-04-11 | 他喜龙株式会社 | Touch panel-use transparent conductive molded product and touch panel |
| CN102063213A (en) * | 2009-11-18 | 2011-05-18 | 北京富纳特创新科技有限公司 | Touch screen and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1947203A (en) * | 2004-04-20 | 2007-04-11 | 他喜龙株式会社 | Touch panel-use transparent conductive molded product and touch panel |
| CN102063213A (en) * | 2009-11-18 | 2011-05-18 | 北京富纳特创新科技有限公司 | Touch screen and display device |
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