CN1409159A - Polaried plate and liquid crystal display with polaried plate - Google Patents
Polaried plate and liquid crystal display with polaried plate Download PDFInfo
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- CN1409159A CN1409159A CN 01138468 CN01138468A CN1409159A CN 1409159 A CN1409159 A CN 1409159A CN 01138468 CN01138468 CN 01138468 CN 01138468 A CN01138468 A CN 01138468A CN 1409159 A CN1409159 A CN 1409159A
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Abstract
A polarized light plate to be used for improving the liquid crystal display device in nonuniform display fabricated by dyeing and cross-linking the polyvinyl alcohol film. The light penetrance (monomer penetronce) of one fabricated polarized light plate and the light penetrance orthogonal penetrance of two fabricated polarized light plates in polarized light axis quadrature satisfy with the following formula of wave length 440 nm monomer penetrance orthogonal penetrance >600 wave length 550 nm monomer penetrance orthogonal penetrance >300 wave length 610 nm monomer penetrance/orthogonal penetrance >11000.
Description
Technical field
The present invention relates to the Polarizer and the liquid crystal indicator of use in improving the uneven liquid crystal indicator of demonstration (being designated hereinafter simply as LCD).
Background technology
The Polarizer that in display device (particularly LCD), uses; for example be polyvinyl alcohol film (the following PVA film that abbreviates as sometimes) usefulness to be had the dyeing process that dichromatic iodine or dichroic dye dye; carry out crosslinked crosslinked operation with boric acid and borax etc.; carry out the stretching process (dyeing of a stretching; crosslinked; each operation that stretches needn't be carried out respectively; can carry out simultaneously; and the also not special regulation of the order of each operation) afterwards; carry out drying, be pasted together with triacetylcellulose film protective seams such as (the following TAC films that abbreviates as sometimes) again and make.
The use of LCD on computing machine etc. sharply increases in recent years.Having many uses of LCD is general, also is used for watch-dog etc.Yet, be used for the LCD of watch-dog, to compare with the computing machine purposes, its picture dimension will maximize, and it is big that the brightness of panel (briliancy) is wanted.Therefore, if still use the Polarizer that in the computing machine purposes, uses, when carrying out the demonstration of Neutral colour such as black and grey, change ground, visual angle from tilted direction, then there is the Polarizer uneven dyeing and sees problem in the irregular demonstration of the raw-material PVA phase differential of Polarizer in the tensile axis direction.
Summary of the invention
The objective of the invention is in order to solve the problem of above-mentioned existence, provide a kind of and show Polarizer and the liquid crystal indicator that uses among the uneven LCD having improved.
In order to achieve the above object, Polarizer of the present invention be to polyvinyl alcohol (PVA) (PVA) film dye, the crosslinked Polarizer of making, it is characterized in that, satisfy by the light transmission (monomer transmissivity) of 1 Polarizer fully and following formula that the light transmission (quadrature transmissivity) when making spool (polarization axle) quadratures of 2 Polarizer polarized lights is calculated.
(the monomer transmissivity) of wavelength 440nm/(quadrature transmissivity)＞600
(the monomer transmissivity) of wavelength 550nm/(quadrature transmissivity)＞3000
(the monomer transmissivity) of wavelength 610nm/(quadrature transmissivity)＞11000
The following formula that light transmission (quadrature transmissivity) when the present invention preferably satisfies by the axle (polarization axle) of the polarized light that makes 2 Polarizers the light transmission (parallel transmissivity) when parallel fully and makes spool (polarization axle) quadratures of 2 Polarizer polarized lights is calculated.
(the parallel transmissivity) of wavelength 440nm/(quadrature transmissivity)＞700
(the parallel transmissivity) of wavelength 550nm/(quadrature transmissivity)＞3000
(the parallel transmissivity) of wavelength 610nm/(quadrature transmissivity)＞11000
In addition, among the present invention, desirable visibility correction transmissivity Y is that (wherein, standard light is an illuminant-C, uses visibility correction (per 700～400nm: 10nm)) more than 42.5%.Above-mentioned transmissivity Y it would be desirable more than 43.0% below 44.0%.Visibility correction transmissivity Y is the value of being obtained by JIS Z 87012 degree visual field XYZ systems.
The polarization luminosity of above-mentioned Polarizer is preferably more than 99.98%.
Polarizer of the present invention is preferably made by the following method: polyvinyl alcohol (PVA) (PVA) film is dyeed, carries out crosslinked with the above crosslinked bath of 2 baths that comprises crosslinking chemical with comprising the dye bath with dichromatic iodine or dichroic dye, in above-mentioned each operation, stretch simultaneously, the stretching ratio that makes the 1st crosslinked bath of bathing is more than 1 times below 4 times, and the stretching ratio that makes the 2nd crosslinked bath of bathing is for than the above-mentioned the 1st higher extensibility of stretching ratio of bathing.At this moment, the total stretching ratio of polyvinyl alcohol (PVA) (PVA) film can be 5～7 times.
The present invention can be reflection-type Polarizer or a Transflective template Polarizer of pasting reflecting plate and Transflective plate on above-mentioned any Polarizer.
The present invention can be ellipse or a rotatory polarization plate of pasting polarizer or λ plate on any Polarizer of above-mentioned record.
The present invention can be a Polarizer of pasting the viewing angle compensation film on any Polarizer of above-mentioned record.
The present invention uses cementing agent or sticker on any Polarizer of above-mentioned record, paste the Polarizer that improves the brightness film.
The present invention also can be the one-sided at least liquid crystal indicator with above-mentioned any Polarizer at liquid crystal cells.
Embodiment
The manufacturing of light polarizing film is broadly divided into 3 operations, that is: " dyeing process " that the PVA film is dyeed in the bath that has added iodine with 2 look characteristics or dyestuff, added boric acid and borax etc. the bath of crosslinking chemical of PVA in carry out crosslinked " crosslinked operation ", carry out " stretching process " that PVA stretches.
" stretching process " often carries out with " dyeing process " and " crosslinked operation " usually simultaneously, but also can carry out in other operation.Dyeing process and crosslinked operation also can be carried out simultaneously.Light polarizing film is carried out drying after above-mentioned 3 operations, form protective seam, makes with film applying such as TAC (triacetyl cellulose) film again.
Polarizing plate making method of the present invention, there is no particular limitation, but when light polarizing film is made, can stretch in each operation of dyeing process, crosslinked operation.In crosslinked operation, the bath that has added crosslinking chemical is set to more than 2 baths, at the 1st stretching ratio of bathing is to stretch below 4 times more than 1 times, after the 2nd bath that has added crosslinking chemical, according to stretching than the 1st high stretching ratio of stretching ratio of bathing that has added crosslinking chemical, like this, can easily obtain having the Polarizer of above-mentioned characteristic.The total stretching ratio of PVA film can be 5～7 times.
The basic comprising of the Polarizer that the present invention uses is: in the one-sided or both sides of the polaroid that is made of the polyvinyl alcohol (PVA) series light polarizing film that contains dichroic substance; by the tack coat that is fit to; for example the tack coat by being made up of vinyl alcohol series polymkeric substance etc. bonds as the transparent protective film of protective seam.
Polaroid (light polarizing film) is for example by being on the film that constitutes of the vinyl alcohol series polymkeric substance that is fit to by existing standard with polyvinyl alcohol (PVA) and part dimethoxym ethane polyvinyl alcohol (PVA) etc., the dichroic substance that utilization is made up of iodine and dichroic dye etc., appropriate processing such as processing, stretch processing, the crosslinking Treatment of dyeing by suitable order and mode are fit to the radioparent polarized light during incidence natural lights.Its light transmission and degree of polarization all are desirable.
Be arranged on the protective film starting material of the protective clear layer of the one-sided or both sides of polaroid (light polarizing film) as formation, can use suitable transparent membrane.An example as polymkeric substance generally adopts the acetate series plastics of similar triacetyl cellulose, yet is not limited to this.
From polarized light characteristic and permanance, the transparent protective film that special hope is used is the triacetylcellulose film that the surface is carried out basification with highly basic.When the light polarizing film both sides are provided with transparent protective film, also can use the transparent protective film that constitutes by different polymkeric substance etc. on its surface and the back side.
The transparent protective film that is used for protective seam, only otherwise damage purpose of the present invention, can carry out also that hard coating is handled and the antireflection processing, to prevent to adhere to and diffusion and anti-dazzle are the processing etc. of purpose.The purpose that hard coating is handled is the damage that prevents the polarized light surface, and for example good cured film such as hardness that will be formed by the suitable uv-hardening resin of silicon series and sliding are attached to the surface of protective film, can form hard coating.
The purpose that prevents to reflect processing is the outer reflection of light that prevents on the Polarizer surface, can finish by forming by the reflectance coating that prevents of standard before.Prevent that the purpose that adheres to from being to prevent bonding with adjoining course; the purpose that anti-dazzle is handled is to prevent at Polarizer surface external light reflection and hinder looking of Polarizer transmitted light and recognize; for example can adopt the suitable modes such as fit system of asperities mode such as sandblast and embossing processing and transparent particulate, by on the transparent protective film surface attached the structure with micro concavo-convex finish.
Above-mentioned transparent particulate can be that mean grain size is silicon dioxide and aluminium oxide, titanium dioxide and zirconia, tin oxide and indium oxide, cadmium oxide and the antimony oxide etc. of 0.5～20 μ m, also can use inorganic serial particulate, also can use organic series particulate of forming by crosslinked or uncrosslinked granular thing of polymkeric substance etc. etc. with electric conductivity.The use amount of transparent particulate generally is that per 100 weight portions of transparent resin are 2～70 weight portions, is in particular 5～50 weight portions.
The anti-dazzle photosphere that transparent particulate cooperates can be used as protective clear layer, perhaps as the settings such as coating of transparency protected laminar surface.Anti-dazzle photosphere also can be held a concurrent post and is used to the diffusion layer (viewing angle compensation function etc.) that spreads the Polarizer transmitted light and enlarge the visual angle.The above-mentioned reflection horizon and prevent adhesion layer, diffusion layer and anti-dazzle photosphere etc. of preventing can be used as the optical layers that is made of the thin plate that is provided with these layers, also can with the setting of coming of protective clear layer branch.
Among the present invention; polaroid (light polarizing film) and as the binder-treatment of the transparent protective film of protective seam; there is no particular limitation; for example; at least can be by the cementing agent of forming by vinyl alcohol series polymkeric substance, perhaps the cementing agent of being made up of the water-soluble cross-linker of the serial polymkeric substance of vinyl alcohol of boric acid and borax, metacetaldehyde and melamine, oxalic acid etc. carries out.This tack coat can form the coating drying layer of aqueous solution, and also can cooperate the catalyzer of other adjuvants and acid etc. as required when the modulation of aqueous solution.
Polarizer of the present invention can be used as the optical component use stacked with other optical layers when practicality.There is no particular limitation for this optical layers; for example can use reflecting plate and Transflective plate; polarizer (also comprises 1/2 wavelength plate; λ plates such as 1/4 wavelength plate); viewing angle compensation film and improve 1 layer or 2 layers of the optical layers that brightness film etc. is suitable for forming liquid crystal indicator; particularly reflection-type Polarizer that stacked reflecting plate or Transflective plate constitute on the Polarizer of being made up of the polaroid and the protective seam of the invention described above or Transflective template Polarizer; the ellipse of stacked polarizer or rotatory polarization plate on the Polarizer of forming by the polaroid and the protective seam of the invention described above; the Polarizer of stacked viewing angle compensation film on the Polarizer of being made up of the polaroid and the protective seam of the invention described above, perhaps the Polarizer of stacked raising brightness film all is desirable on the Polarizer of being made up of the polaroid and the protective seam of the invention described above.
As above-mentioned reflecting plate is described, reflecting plate is it to be arranged on form the reflection-type Polarizer on the Polarizer, again the reflection-type Polarizer is arranged on the inboard, the back side of common liquid crystal cells, form the liquid crystal indicator that reflects the incident light that showing considers oneself as recognizes side (demonstration side), the light sources such as back light of dress have the advantage of easy realization liquid crystal indicator slimming in can omitting.
The formation of reflection-type Polarizer can be passed through above-mentioned transparent protective film as required, adopts the suitable modes such as reflection horizon that are made of metal etc. to be set on the one side of Polarizer to realize.Can enumerate a concrete example, that is: as required on the one side of the transparent protective film that rough surface is handled, the paper tinsel and the vapor-deposited film that are made of reflective metal such as aluminium are set form the reflection horizon.
Also have in addition, containing the reflection-type Polarizer that has the reflection horizon of this micro concavo-convex structure of reflection on the above-mentioned transparent protective film that particulate forms surperficial micro concavo-convex structure.The advantage that the reflection horizon of surface micro concavo-convex structure has is: can prevent from can suppress the inhomogeneous of light and shade owing to diffuse reflection makes incident light diffusion directionality that causes and the outward appearance of dazzling the eyes.The formation in the micro concavo-convex structure reflection horizon of the surperficial micro concavo-convex structure of reflection transparent protective film; can adopt suitable modes such as evaporation modes such as vacuum evaporation, ion plating, spraying plating and plating mode, the method that metal is set directly at the transparent protective film surface realizes.
Replace reflecting plate to be set directly at mode on the transparent protective film of above-mentioned Polarizer, also can adopt the reflection thin plate that the reflection horizon is set on the suitable film that with this transparent protective film is standard.Because the reflection horizon of reflecting plate is made of metal usually; so cover the user mode of its reflecting surface by film and Polarizer etc.; from preventing that it from descending because of oxidation makes reflectivity, and then initial reflectance to be kept for a long time and avoid being provided with in addition other protective seams be desirable.
The Semitransmissive Polarizer can make the Semitransmissive reflection horizon such as half-mirror of light reflection and transmission obtain by above-mentioned reflection horizon is done to become.The Semitransmissive Polarizer is arranged on the dorsal part of liquid crystal cells, when in brighter environment, using liquid crystal indicator, reflection is considered oneself as and is recognized the incident light displayed image of side (demonstration side), in darker environment, can form the liquid crystal indicator of the built-in light source displayed image such as back light that are loaded on Semitransmissive Polarizer rear side in the use.Just, the Semitransmissive Polarizer can be formed in the bright environment, can save the energy that light source such as back light uses, and in darker environment, can use the liquid crystal indicator of built-in light source.
Ellipse or rotatory polarization plate to stacked polarizer on the Polarizer of forming at the polaroid and the protective seam of the invention described above illustrated below.
Linearly polarized light is changed into ellipse or circularly polarized light, when ellipse or circularly polarized light are changed into linearly polarized light or are changed the direction of polarized light of linearly polarized light, use polarizer etc., especially, use so-called 1/4 wavelength plate (being called λ/4 plates) as linearly polarized light being changed into ellipse or circularly polarized light, ellipse or circularly polarized light being changed into the polarizer of linearly polarized light.1/2 wavelength plate (being called λ/2 plates) is generally used for changing the direction of polarized light of linearly polarized light.
The elliptical polarization plate compensation is because painted (blue or yellow) that the birefringence of STN shape liquid crystal indicator liquid crystal layer produces is effective to not have the above-mentioned painted white black occasion that shows.And control 3 dimension refractive indexes also can compensate painted that (preventing) produces when tilted direction is watched the liquid crystal indicator picture.The rotatory polarization plate is effective to adjust the picture tone of the reflection-type liquid-crystal display device that carries out the image color demonstration, simultaneously, also prevents function of reflecting.
The object lesson of above-mentioned polarizer can be: the film that constitutes for the polymkeric substance that is fit to by polycarbonate and polyvinyl alcohol (PVA), polystyrene and polyisobutylene acid methyl esters, polypropylene and other polyolefin, polyarylate and polyamide etc. carries out the birefringent film that stretch processing obtains and the oriented film of liquid crystal polymer, supports the film of oriented layer of liquid crystal polymer and tilted alignment film etc. with film.The tilted alignment film can be: the heat-schrinkable film that bonds on thin polymer film, under its convergent force effect, carry out stretch processing or/and the film of shrink process and the film that make liquid crystal polymer tilted alignment to thin polymer film by heating.
Polarizer to stacked viewing angle compensation film on the Polarizer of being made up of the polaroid and the protective seam of the invention described above is illustrated below.
The viewing angle compensation film is the film at expansion visual angle, even make the picture of watching liquid crystal indicator from the direction of out of plumb picture, and when the direction that tilts is a little watched picture, can see image more brightly.
This viewing angle compensation film is that coating mixes the coating liquid crystal on triacetylcellulose film etc., as polarizer.Common polarizer adopts the birefringent thin polymer film that has uniaxial tension in its surface direction, in contrast, polarizer as the viewing angle compensation film, employing has Biaxially stretched birefringent thin polymer film in its surface direction, perhaps adopts 2 direction oriented films at the tilted alignment thin polymer film of the thickness direction refractive index of the thickness direction control stretching of surface direction uniaxial tension.As mentioned above, the tilted alignment film can be: the heat-schrinkable film that bonds on thin polymer film, under the effect of its convergent force, carry out stretch processing or/and shrink process make liquid crystal polymer tilted alignment to thin polymer film by heating.The polymkeric substance that illustrates in the starting material polymkeric substance of polarizer and the polarizer of front is the same.
On the Polarizer that the polaroid of the invention described above and protective seam are formed, paste the sticking Polarizer that improves the brightness film, be arranged on the dorsal part position of liquid crystal cells usually and use.Improve the brightness film and have following characteristic; that is: during when the back light of liquid crystal indicator etc. with by the natural light incident of dorsal part reflection; the linearly polarized light of reflection regulation polarization axle or the circularly polarized light of prescribed direction; other transmittance; therefore; with improve the brightness film with the Polarizer that constitutes by above-mentioned polaroid and protective seam the Polarizer after stacked; make light incident from light sources such as back lights; obtain the transmitted light of regulation polarized light state, make simultaneously and above-mentionedly decide the not transmission of light beyond the polarized light state and reflect.Will be by this light that improves brightness film surface reflection by turning back in the reflection horizon of its rear side setting etc., inciding brightness once more improves on the plate, make its part or all transmittance as the regulation polarized light state, obtained the light increment of transmission raising brightness film, supply with the polarized light that polaroid is difficult to absorb simultaneously, increase owing to can be used for the luminous flux that liquid crystal image shows etc., then improved brightness.Just, do not use and improve the brightness film, from the dorsal part of liquid crystal cells during by the polaroid incident light, the light that has with the inconsistent direction of polarized light of polarization axle of polaroid is nearly all absorbed by polaroid, can not see through polaroid with back light.That is, according to the difference of the characteristics of polarizer film that uses, about 50% light is absorbed by polaroid, then can be used for the luminous flux that the liquid crystal image shows etc. and reduces visual deepening.Improving the brightness film makes the light with the direction of polarized light that can be absorbed by polaroid not incide polaroid, and by improving the reflection of brightness film, turn back in reflection horizon by being arranged on its rear side etc. again, reenter and be mapped on the brightness raising plate, thereby the polarized light transmission that carries out repeatedly making the polarisation of light light direction that reflects between the two, turns back become the direction of polarized light that can pass through polaroid improves the brightness film, supply with polaroid, the image that then can effectively light such as back light be used for liquid crystal indicator shows, makes picture brighter.
As above-mentioned raising brightness film, for example can be: the multilayer laminate of the film that the dielectric multilayer film is different with the refractive index anisotropy be such, have the linearly polarized light of transmission regulation polarization axle and reflect the film (" D-BEF " that 3M society makes etc.) of the characteristic of other light, and with the cholesteryl liquid crystal layer, especially the oriented film of cholesteryl liquid crystal polymkeric substance and aligned liquid-crystal layer thereof are supported in film (" PCF350 " that day Dong Diangongshe makes on the film substrate, " Transmax " that Merck society makes) such, have the circularly polarized light reflection that makes or turn right one of them and make the film of the characteristic of other light transmissions.
Making the above-mentioned light transmissive brightness raising of the linear polarization type film of deciding polarization axle, by making the polarization axle unanimity this transmitted light is incided on the Polarizer, can suppress the absorption loss of Polarizer, more effectively transmission.In addition, at the light transmissive brightness raising of the circular polarization that makes cholesteryl liquid crystal layer type film, can former state incide on the polaroid, yet from suppressing absorption loss, it is photochemical preferably by polarizer this transmission circularly polarized light to be carried out linear polarization, reenters to be mapped on the Polarizer.Use 1/4 wavelength plate as this polarizer, circularly polarized light can be transformed to linearly polarized light.
The polarizer that has 1/4 wavelength plate function in broad wavelength coverages such as visible light zones can obtain in the following manner, that is: will have the phase separation layer of 1/4 wavelength plate function and the phase separation layer with other phase difference characteristics for the monochromatic light of wavelength 550nm, the phase separation layer that for example has 1/2 wavelength plate function is overlapping.The polarizer that is configured in Polarizer and improves between the brightness film is made up of the phase separation layer more than 1 layer or 2 layers.
For the cholesteryl liquid crystal layer, carry out the different liquid crystal layer combination of reflection wavelength, form arrangement overlapping more than 2 layers or 3 layers, can be at broad wavelength coverage reflection circle polarized lights such as visible light zones, and can obtain the transmission circularly polarized light of broad wavelength coverage in view of the above.
Polarizer of the present invention can be with Polarizer and the stacked formation of the optical layers more than 2 layers or 3 layers as above-mentioned polarized light divergence type Polarizer.Also can be reflection-type elliptical polarization plate and the Semitransmissive elliptical polarization plate that above-mentioned reflection-type Polarizer and Semitransmissive Polarizer and polarizer are made up.The stacked optical component of optical layers more than 2 layers or 3 layers, can in the manufacture process of liquid crystal indicator etc., form in stacked respectively mode successively, but giving stacked optical component in advance is good on quality stability and assembly manipulation, has the advantage of the manufacturing efficient that improves liquid crystal indicator.In stacked, suitable bonding technologies such as adhesive coating have been used.
In Polarizer of the present invention and optical component, can be provided for adhesive coating with other members bondings such as liquid crystal cells.This adhesive coating can be that the sticker that suits forms by existing standard with propylene series etc.Because of descending and the warpage of liquid crystal cells and from the formation viewpoint of the good liquid crystal indicator of high-quality and permanance, optical characteristics that thermal expansion difference etc. causes wishes that hydroscopicity is low, the adhesive coating of excellent heat resistance from preventing foaming phenomenon and the peeling phenomenon that produces because of moisture absorption and preventing.Also can form and contain the adhesive coating that particulate has light diffusing.Can on the surface of necessity, adhesive coating be set as required, for example on the Polarizer protective seam of forming by polaroid of the present invention and protective seam, can adhesive coating be set on the single face or the two sides of protective seam as required.
When being arranged on the adhesive coating exposing surface of Polarizer and optical component, before this adhesive coating provided practicality, the most handy dividing plate was covered, and reached antipollution purpose.Dividing plate can form in the following manner, on the suitable slender lobule body that with above-mentioned transparent protective film etc. is standard, the release coating that the removers that are fit to by silicone series and long lock alkyl series, fluorine series and molybdenum sulfide etc. form is set as requested that is:.
Form light polarizing film and each layers such as transparent protective film, optical layers and adhesive coating of above-mentioned Polarizer and optical component; use makes it have the UVA function by the mode that the ultraviolet light absorber of salicylate series compound and benzophenone series compound, benzotriazole series compound and cyano group propylene series compound, nickel complex salt series compound etc. carries out suitable processing.
Polarizer of the present invention can be used for the formation of various devices such as liquid crystal indicator etc. satisfactorily.What liquid crystal indicator can have the transmission-type that Polarizer of the present invention is configured in the one-sided or both sides of liquid crystal cells and forms and reflection-type or Transflective dual-purpose type etc. is the structure that is fit to by existing standard.The liquid crystal cells that forms liquid crystal indicator is arbitrarily, for example can adopt the active matrix drive type of representing film transistor type, represents the liquid crystal cells of suitable classifications such as the simple matrix of stable twisted nematic and STN Super TN type is driving.
When the liquid crystal cells both sides were provided with Polarizer and optical component, they can be identical, also can be different.And, when liquid crystal indicator forms, can dispose the parts that prism array thin plate and lens arra thin plate, light diffusing sheet and back light etc. are fit to more than 1 layer or 2 layers in position.
Polarizer of the present invention, even in using the LCD of high brightness monitor etc., do not find yet by Polarizer cause inhomogeneous.
Embodiment
Below further specify the present invention with embodiment.
(comparative example 1)
The PVA (9 * 75RS) that uses Kuraray company to make, 3.2 times and dyeing stretch in dye bath (aqueous solution that contains iodine and KI), after this in the crosslinked bath that contains boric acid, carry out 1.9 times of stretchings (adding up to 6.08 times of stretching ratios), carry out drying with 50 ℃ dryer then, promptly make polaroid.It is sticking to use PVA series cementing agent and TAC (triacetyl cellulose) film to paste at last, obtains the Polarizer of the degree of polarization 99.94% of visibility revisal transmissivity 44.13%.
(comparative example 2)
The PVA (9 * 75RS) that uses Kuraray company to make, 3 times and dyeing stretch in dye bath (aqueous solution that contains iodine and KI), after this in bathing, the 1st of the crosslinked bath that contains boric acid carries out 1.5 times of stretchings, then in bathing, the 2nd of the crosslinked bath that contains boric acid carries out 1.34 times of stretchings (adding up to 6.03 times of stretching ratios), carry out drying with 50 ℃ dryer then, promptly make polaroid.It is sticking to use PVA series cementing agent and TAC (triacetyl cellulose) film to paste at last, obtains the Polarizer of the degree of polarization 99.97% of visibility revisal transmissivity 43.35%.
(embodiment 1)
The PVA (9 * 75RS) that uses Kuraray company to make, 3.2 times and dyeing stretch in dye bath (aqueous solution that contains iodine and KI), after this in bathing, the 1st of the crosslinked bath that contains boric acid carries out 1.2 times of stretchings, then in bathing, the 2nd of the crosslinked bath that contains boric acid carries out 1.7 times of stretchings (adding up to 6.5 times of stretching ratios), carry out drying with 50 ℃ dryer then, promptly make polaroid.It is sticking to use PVA series cementing agent and TAC (triacetyl cellulose) film to paste at last, obtains the Polarizer of the degree of polarization 99.98% of visibility revisal transmissivity 43.25%.
(embodiment 2)
The PVA (9 * 75RS) that uses Kuraray company to make, 3 times and dyeing stretch in dye bath (aqueous solution that contains iodine and KI), after this in bathing, the 1st of the crosslinked bath that contains boric acid carries out 1.4 times of stretchings, then in bathing, the 2nd of the crosslinked bath that contains boric acid carries out 1.6 times of stretchings (adding up to 6.72 times of stretching ratios), carry out drying with 50 ℃ dryer then, promptly make polaroid.It is sticking to use PVA series cementing agent and TAC (triacetyl cellulose) film to paste at last, obtains the Polarizer of the degree of polarization 99.99% of visibility revisal transmissivity 43.35%.
The transmissivity of Polarizer is measured with the integrating sphere type spectral-transmission favtor analyzer D0-3 that (color technical institute in the village) makes.
(the uneven evaluation method 1 of Polarizer)
In the darkroom, on the back light of illumination 33000Lux, the polarizing axis that makes 2 Polarizers estimating is a quadrature, confirm with the polarizing axis vertical direction visual whether see netted inhomogeneous.
(the uneven evaluation method 2 of Polarizer)
In the darkroom, on the back light of illumination 3300Lux, whether make the polarizing axis configured in parallel of 2 Polarizers, making the Polarizer of estimating between these 2 Polarizers is quadrature, confirming to see inhomogeneous with the polarizing axis vertical direction of the Polarizer of estimating.
(the uneven evaluation method 3 of Polarizer)
Peel the Polarizer up and down of the liquid crystal cells that sticks on commercially available 18 inches LCS monitors (300 candela), paste the Polarizer of evaluation with sticker after, make the black that is shown as of monitor, the visual angle of monitor is watched in conversion, confirms whether seeing that with the polarizing axis vertical direction of Polarizer lines (net) shape is inhomogeneous.
[table 1]
The transmissivity of wavelength 440nm (%)
The parallel transmissivity quadrature of monomer transmissivity transmissivity (A)/(C) (B)/(C)
(A), (B), (C) comparative example 1 40.240 32.150 0.109 369 295 comparative examples 2 39.425 31.030 0.071 555 437 embodiment 1 39.210 30.580 0.017 2,306 1799 embodiment 2 39.460 30.850 0.018 2,192 1714
[table 2]
The transmissivity of wavelength 550nm (%)
The parallel transmissivity quadrature of monomer transmissivity transmissivity (A)/(C) (B)/(C)
(A), (B), (C) comparative example 1 44.280 38.820 0.026 1,703 1493 comparative examples 2 43.510 37.570 0.014 3,108 2684 embodiment 1 43.430 37.310 0.011 3,948 3392 embodiment 2 43.530 37.390 0.001 43,530 37390
[table 3]
The transmissivity of wavelength 610nm (%)
The parallel transmissivity quadrature of monomer transmissivity transmissivity (A)/(C) (B)/(C)
(A), (B), (C) comparative example 1 44.380 39.050 0.004 11,095 9763 comparative examples 2 43.430 37.470 0.002 21,715 18735 embodiment 1 43.500 37.510 0.003 14,500 12503 embodiment 2 43.520 37.490 0.002 21,760 18745
[table 4]
Uneven evaluation result
Evaluation method 1 evaluation method 2 evaluation methods 3
(visual) (visual) (visual) comparative example 1 exist inhomogeneous exist inhomogeneous exist inhomogeneous comparative example 2 exist inhomogeneous exist inhomogeneous exist inhomogeneous embodiment 1 do not have inhomogeneous do not have inhomogeneous do not have inhomogeneous embodiment 2 do not have inhomogeneous do not have inhomogeneous do not have inhomogeneous
(evaluation result)
" the inhomogeneous evaluation result " of observing table 1～4 as seen, embodiment 1,2 has obtained cannot see uneven good Polarizer.
Just, the 1st of boric acid is bathed and the 2nd stretching ratio of bathing is made with the combination that adds up to stretching ratio to improve to contain, and degree of polarization is reached more than 99.98, obtains cannot see uneven Polarizer.
As mentioned above, Polarizer of the present invention be to polyvinyl alcohol (PVA) (PVA) film dye, the crosslinked Polarizer of making, owing to satisfy by the light transmission (monomer transmissivity) of 1 Polarizer fully and following formula that the light transmission (quadrature transmissivity) when making axle (polarizing axis) quadratures of polarisation of 2 Polarizers is calculated, then can be provided at and improve Polarizer and the liquid crystal indicator that uses among the uneven LCD of demonstration.
(the monomer transmissivity) of wavelength 440nm/(quadrature transmissivity)＞600
(the monomer transmissivity) of wavelength 550nm/(quadrature transmissivity)＞3000
(the monomer transmissivity) of wavelength 610nm/(quadrature transmissivity)＞11000
Claims (13)
1, a kind of Polarizer, be to polyvinyl alcohol (PVA) (PVA) film dye, the crosslinked Polarizer of making, it is characterized in that, satisfy by the light transmission (monomer transmissivity) of 1 Polarizer fully and following formula that the light transmission (quadrature transmissivity) when making spool (polarizing axis) quadratures of polarisation of 2 Polarizers is calculated:
(the monomer transmissivity) of wavelength 440nm/(quadrature transmissivity)＞600
(the monomer transmissivity) of wavelength 550nm/(quadrature transmissivity)＞3000
(the monomer transmissivity) of wavelength 610nm/(quadrature transmissivity)＞11000.
2, the Polarizer of claim 1 record, it is characterized in that the following formula that the light transmission (quadrature transmissivity) when satisfying by the axle (polarizing axis) of the polarisation that makes 2 Polarizers the light transmission (parallel transmissivity) when parallel fully and making spool (polarizing axis) quadratures of polarisation of 2 Polarizers is calculated:
(the parallel transmissivity) of wavelength 440nm/(orthomorphism rate)＞700
(the parallel transmissivity) of wavelength 550nm/(quadrature transmissivity)＞3000
(the parallel transmissivity) of wavelength 610nm/(quadrature transmissivity)＞11000.
3, the Polarizer of claim 1 record is characterized in that, visibility revisal transmissivity Y is that (wherein, standard light is an illuminant-C, uses visibility revisal (per 700～400nm: 10nm)) more than 42.5%.
4, the Polarizer of claim 3 record is characterized in that, above-mentioned transmissivity is more than 43.0% below 44.0%.
5, the Polarizer of claim 1 record is characterized in that degree of polarization is more than 99.98%.
6, the Polarizer of claim 1 record, it is characterized in that, make in such a way: polyvinyl alcohol (PVA) (PVA) film is dyeed with the dye bath that has dichromatic iodine or contain dichroic dye, carry out crosslinked with the above crosslinked bath of 2 baths that contains crosslinking chemical, and in above-mentioned each operation, stretch
The stretching ratio that makes the 1st crosslinked bath of bathing is more than 1 times below 4 times,
The extensibility that makes the stretching ratio of the 2nd crosslinked bath of bathing be higher than the above-mentioned the 1st stretching ratio of bathing stretches.
7, the Polarizer of claim 6 record is characterized in that the total stretching ratio of polyvinyl alcohol (PVA) (PVA) film is 5～7 times.
8, a kind of reflection-type Polarizer is characterized in that, pastes reflecting plate on the Polarizer of claim 1 record.
9, a kind of Transflective template Polarizer is characterized in that, pastes the Transflective plate on the Polarizer of claim 1 record.
10, a kind of ellipse or rotatory polarization plate is characterized in that, paste polarizer or λ plate on the Polarizer of claim 1 record.
11, a kind of Polarizer is characterized in that, pastes the viewing angle compensation film on the Polarizer of claim 1 record.
12, a kind of Polarizer is characterized in that, on the Polarizer of claim 1 record, uses cementing agent or sticker, pastes and improves the brightness film.
13, a kind of liquid crystal indicator is characterized in that, at the one-sided at least Polarizer with claim 1 record of liquid crystal cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138468 CN1267776C (en) | 2001-10-03 | 2001-10-03 | Polaried plate and liquid crystal display with polaried plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01138468 CN1267776C (en) | 2001-10-03 | 2001-10-03 | Polaried plate and liquid crystal display with polaried plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1409159A true CN1409159A (en) | 2003-04-09 |
| CN1267776C CN1267776C (en) | 2006-08-02 |
Family
ID=4674586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01138468 Expired - Fee Related CN1267776C (en) | 2001-10-03 | 2001-10-03 | Polaried plate and liquid crystal display with polaried plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1267776C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100350555C (en) * | 2004-01-08 | 2007-11-21 | 大日本网目版制造株式会社 | Substrate processing apparatus |
| CN1550797B (en) * | 2003-04-25 | 2010-05-26 | 日东电工株式会社 | Method of producing polarizing film, polarizing film and image display device using the same |
| CN104395787A (en) * | 2013-06-18 | 2015-03-04 | Lg化学株式会社 | Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer |
| CN108474900A (en) * | 2016-01-29 | 2018-08-31 | 富士胶片株式会社 | Half-mirror and mirror with image display function |
-
2001
- 2001-10-03 CN CN 01138468 patent/CN1267776C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1550797B (en) * | 2003-04-25 | 2010-05-26 | 日东电工株式会社 | Method of producing polarizing film, polarizing film and image display device using the same |
| CN100350555C (en) * | 2004-01-08 | 2007-11-21 | 大日本网目版制造株式会社 | Substrate processing apparatus |
| CN104395787A (en) * | 2013-06-18 | 2015-03-04 | Lg化学株式会社 | Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer |
| CN104395787B (en) * | 2013-06-18 | 2017-04-26 | Lg化学株式会社 | Thin Polarizer, method for manufacturing same, and polarizing plate and display device comprising thin polarizer |
| CN108474900A (en) * | 2016-01-29 | 2018-08-31 | 富士胶片株式会社 | Half-mirror and mirror with image display function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1267776C (en) | 2006-08-02 |
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