CN101042491A - Glare-proof polarizing film laminate and liquid crystal display comprising the same - Google Patents

Abstract

The invention relates to a liquid crystal display including a liquid crystal box; a pair of linear polarimeters arranged on two surfaces of the liquid crystal box; a first relay plate having a refractive index relation: nxny>=nz between a box base material and reapecive linear polarimeters, the first relay plate being arranged so that a phase relay axes of the first delay plate is parallel with or has a right angle with a transmission axes of the adjacent linear polarimeter; a second relay plate having a refractive index relation that: ny is identical to nx and larger than nz, between the first delay plate and the box base material or between another box base material and the linear polarimeters; and an anti-dazzle layer provided on a surface of any one of the linear polarimeters, wherein a haze of an inversed vertical incident light of the anti-dazzle layer is 5% or less, a total reflection definition is 50% or less, an incident light inversed below an incident angle of 30 degrees has a special reflection distribution, and a surface of the anti-dazzle layer is composed of polygons having an average area of 50 mu m2 to 1500 mu m2.

Description

LCD and use therein glare-proof polarizing film are pressed material

Technical field

The glare-proof polarizing film that the present invention relates to have the LCD of improved anti-dazzle performance and be used for this LCD is pressed material.

Background technology

Because LCD has good characteristic as light, thin, low power consumption etc., they are used for the PC etc. of portable TV, notebook size gradually.Recently, LCD is used for picture switching apparatus such as giant-screen TV etc. also cumulatively.Under the situation of LCD that is used for display image such as TV machine, emphasis is visual, especially when the contrast ratio when screen is seen in the front with when the contrast ratio when vergence direction is seen screen, i.e. viewing angle properties.For improving viewing angle properties, the various drive patterns of liquid crystal cell (liquid crystal cell) have been proposed.

As a example with LCD of improving viewing angle properties, JP 2548979 B disclose perpendicular alignmnet (VA) mode LCD, and the rod shaped liquid crystal molecule that wherein will have plus or minus anisotropy specific inductive capacity is arranged in the vertical direction of the base material that relates to liquid crystal cell.Because in the VA pattern, arrange liquid crystal molecule under the not driving condition of display in the vertical direction of the base material that relates to liquid crystal cell, light can not have the variation of polarization by liquid crystal layer.Therefore, when making the polarization axle of polarization plates be mutually the right angle on the preceding and rear surface that a pair of linear polarization plate is placed on liquid crystal board respectively, see substantially completely black scope from the front and therefore obtain high contrast ratio.

Yet, in the VA mode LCD that only comprises the linear polarization plate that is placed on the liquid crystal cell, when seeing the screen of display from vergence direction, the angle that forms by the polarization axle of linear polarization plate can from 90 degree depart from and box the clavate liquid crystal molecule show birefringence, make light leak and therefore contrast ratio greatly reduce.

For preventing that the light in the VA mode LCD from leaking, and should provide optical compensation films between liquid crystal cell and linear polarization plate.For this purpose, between liquid crystal cell and polarization plates separately, insert biaxial retardant plates, or uniaxial retardation plate and complete biaxial retardant plates are placed on the preceding and rear surface of liquid crystal cell, or two retardation plates all are placed on the surface of liquid crystal cell.For example, JP-A-2001-109009 discloses the VA mode LCD, wherein with a-plate (being positive uniaxial retardation plate) and c-plate (being complete biaxial retardant plates) respectively liquid crystal cell and before and retrodeviate between the vibration plate and insert.

Positive uniaxial retardation plate is represented ratio R ₀/ R _ThPhase shift films for about 2, wherein R ₀Be length of delay and R in the plane _ThIt is the length of delay in the thickness direction.Biaxial retardant plates is represented length of delay R in the plane fully ₀Phase shift films for about 0.Length of delay R in the plane ₀With the length of delay R in the thickness direction _ThRespectively by following formula (1) and (2) definition:

R ₀＝(n _x-n _y)×d (1)

R _th＝[(n _x+n _y)/2-n _z]×d (2)

N wherein _xBe the refractive index in the phase retardation direction of principal axis in the plane, n _yBe the refractive index in the axial direction of advancing mutually in the plane, n _zBe the thickness that refractive index in thickness direction and d are film.

Under the situation of positive uniaxial retardation film, n _zNo better than $n_y(n_z\&cong;n_y)$ With therefore R ₀R _ThFor about $2({\mathrm{<figure-callout\; id="0"\; label="R"\; filenames="A20071008894300361.png"\; state="\{\{state\}\}">R</figure-callout>}}_0/R_{\mathrm{th}}\&cong;2).$ For uniaxial retardation film, depend on the alignment conditions of film, ratio R ₀/ R _ThCan in about 1.8 and 2.2 scope, change.Under the situation of complete biaxial retardation film, n _xNo better than $n_y(n_x\&cong;n_y)$ With therefore R ₀For about $0({\mathrm{<figure-callout\; id="0"\; label="R"\; filenames="A20071008894300361.png"\; state="\{\{state\}\}">R</figure-callout>}}_0\&cong;0).$ For complete biaxial film and since only the refractive index in the thickness direction be different from (less than) other refractive index, this phase shift films has negative uniaxiality and therefore it is called the film that has optical axis in normal direction, or above-mentioned c-plate.In biaxial retardation film, refractive index has following relation: n _x＞n _y＞n _z

Polarization plates has protective seam at least one surface of polarizing coating.Protective seam generally includes the tri acetyl cellulose film.Having carried out various trials replaces the tri acetyl cellulose film or gives delay performance to protective seam to adopt other resin molding.For example, JP-A-08-43812 describes is that at least one protective seam of polarizing coating is made up of birefringent film.JP-A-07-287123 is disclosed to be that the protective seam of polarizing coating is made by norbornene resin (cyclic olefin resins).

In addition, when their outside light time of image display panel reflection, image display such as LCD are lost their observability significantly.Therefore, be that the screen surfaces of processes and displays equipment is to prevent the reflection of exterior light usually in the monitor screen etc. of important use such as TV, PC in picture quality and observability.As the measure that prevents to reflect, the non-glare treated that forms small irregular image with scatter incident light and broken thus reflection from the teeth outwards is preferred for such as application such as large scale PC, monitor, TV, because this processing is carried out under suitable relatively cost.

As the film that this anti-dazzle performance is provided, JP-A-2002-365410 discloses has small irregular blooming on its surface, wherein when the reflected light that enters and only observe the direction under the angles of-10 degree of normal on the surface of light at film from the surface, distribution of reflected light satisfies special relationship.JP-A-2002-189106 discloses and has comprised that the resin bed that transparent resin film and ionization radiation solidify has small irregular antiglare film, it is being formed by following mode on the surface of transparent resin film: solidifying resin bed that ionization radiation solidifies, to insert resin that ionization radiation solidifies simultaneously between embossing mould and transparent resin film this small irregular to form, make three-dimensional 10 mean roughness and for three-dimensional surface roughness at the mean distance between the adjacent protrusion part under the data level in particular range separately.

JP-A-2004-90187 discloses the method for producing roller, this roller is used to produce contains small irregular film on its surface, this method comprises the steps: to form the metal level of plating on the surface of dandy roll, the surface of mirror polishing plating coating metal layer, adopt the mirror polished surface of ceramic bead sandblast (blast) plating coating metal layer and randomly knock the metal level of plating.

Usually, the antiglare film that may must use has a high mist degree of at least 10% is with the reflection that prevents exterior light and guarantee enough observabilities, and the antiglare film with this high mist degree is widely used in the PC, TV of notebook size etc.Yet the shortcoming with antiglare film of at least 10% high mist degree is the contrast measured in bright room owing to its wide reflection-scattering property reduces.In addition, the shortcoming with antiglare film of high mist degree is that also it also is reduced in the middle contrast of measuring between dark place, and this is that LCD is intrinsic.

For solving those problems, JP-A-2006-53371 discloses the antiglare film with low haze and special reflecting distribution, it is produced by following mode: it is irregular to adopt the fine particle sandblast to form on the sheet metal of polishing, electroless nickel plating to be reducing the irregular degree of depth forming mould on the irregular surface of sheet metal, and the surface imperfection of transfer mold is to the surface of transparent resin film.

What JP-A-2006-39270 described is to be applied to the observability that display improves the VA mode LCD by the antiglare layer that will separate in the special domain zone with linear polarization, single shaft or biaxial retardant plates and complete biaxial retardant plates.

Summary of the invention

An object of the present invention is to provide LCD, have high anti-dazzle performance and improved viewing angle properties especially and do not increase the LCD of the VA pattern of mist degree.

Another object of the present invention provides the glare-proof polarizing film that is suitable for this LCD and presses material.

The present invention is based on the LCD of JP-A-2006-39270, this display comprises the VA mode liquid crystal box that is clipped between a pair of polarization plates and the two types of retardation plates, this retardation plate is placed on one or two space between liquid crystal cell base material and the polarization plates, and it is applied as disclosed antiglare film with improvement reflection distribution in JP-A-2006-53371.Then, carry out the anti-dazzle performance of various researchs with this LCD of further improvement.Found that, antiglare layer with special optical characteristic and special surface shape is in display screen side, promptly observe side and can significantly improve the contrast of LCD, this LCD comprises VA mode liquid crystal box, be placed on a pair of linear polarization on the preceding and rear side of liquid crystal cell, be placed on positive single shaft or the biaxial retardant plates between a box base material and the linear polarization and be placed on a box base material and linear polarization between or the complete biaxial retardant plates between another box base material and another linear polarization.In addition, found to be used for the novel glare-proof polarizing film pressure material of this LCD.Then, further finish the present invention after the research.

Therefore, the invention provides a kind of LCD, this display comprises:

Liquid crystal cell, this liquid crystal cell comprise a pair of box base material and be clipped in liquid crystal layer between the box base material, and wherein liquid crystal molecule is being orientated not existing to apply under the voltage near the base material in being basically perpendicular to the direction of base material;

Be placed on a pair of linear polarization on the outside surface of box base material separately, between them, sandwich liquid crystal cell;

Be placed on a box base material and first retardation plate between the linear polarization separately, the refractive index of this first retardation plate satisfies following relation: n _x＞n _y〉=n _z, n wherein _xAnd n _yBe principal refractive index and the n in the membrane plane _zBe the refractive index in the thickness direction of film, and it is basic parallel with the axis of homology of adjacent linear polarizer or meet at right angles substantially with it to be placed the phase retardation axle that makes the retardation plate of winning;

Be placed between first retardation plate and the box base material or another box base material and in the face of second retardation plate between its linear polarization, the refractive index of this second retardation plate satisfies following relation: $n_x\&cong;n_y>n_z,$ N wherein _x, n _yAnd n _zIdentical with above definition; With

Be placed on the lip-deep antiglare layer of arbitrary linear polarization, this polarizer surperficial relative with in the face of liquid crystal cell, wherein antiglare layer is 5% or littler against the mist degree of vertical incidence light, when under the incident angle of 45 degree light, using three optical frequency coms forming by concealed wire and bright line to measure the reflection sharpness, total reflection sharpness is 50% or littler, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (30) under the reflection angle of 30 degree is 2% or littler, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (40) under the reflection angle of 40 degree is 0.003% or littler, and R (〉=60) is 0.001 or littler with the ratio of R (30), wherein R (〉=60) is the incident light that enters against under the incident angle of 30 degree, reflectivity under 60 degree or bigger reflection angle in any direction, and the surface of antiglare layer is 50 μ m by average area ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.

In LCD of the present invention, comprise that the laminated material of antiglare layer, linear polarization and retardation plate has novel structure.Therefore, the present invention also provides a kind of glare-proof polarizing film to press material, this laminated material comprises the antiglare layer that adopts this order lamination, linear polarization and retardation plate, wherein antiglare layer is 5% or littler against the mist degree of vertical incidence light, when under the incident angle of 45 degree light, using three optical frequency coms forming by concealed wire and bright line to measure the reflection sharpness, total reflection sharpness is 50% or littler, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (30) under the reflection angle of 30 degree is 2% or littler, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (40) under the reflection angle of 40 degree is 0.003% or littler, and R (〉=60) is 0.001 or littler with the ratio of R (30), wherein R (〉=60) is the incident light that enters against under the incident angle of 30 degree, reflectivity under 60 degree or bigger reflection angle in any direction, and the surface of antiglare layer is 50 μ m by average area ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface; With

Retardation plate comprises and is selected from least one following retardation plate: refractive index satisfies relation: n _x＞n _y〉=n _zFirst retardation plate and refractive index satisfy relation: $n_x\&cong;n_y>n_z$ Second retardation plate, n wherein _xAnd n _yBe principal refractive index and the n in the membrane plane _zBe the refractive index in the thickness direction of film,

Condition is when using first retardation plate, places this first retardation plate and makes the phase retardation axle of the retardation plate of winning basic parallel with the axis of homology of linear polarization or meet at right angles substantially with it.

Press in the material at glare-proof polarizing film of the present invention, retardation plate can be by having relation: n _x＞n _y〉=n _zSingle first retardation plate form.In the case, placing retardation plate makes that the phase retardation axle of retardation plate is basic parallel with the axis of homology of linear polarization or meets at right angles substantially with it.Perhaps, retardation plate can be by having relation: $n_x\&cong;n_y>n_z$ Single second retardation plate form.In addition, retardation plate can be made up of the laminated material of first retardation plate and second retardation plate.In the case, advantageously place laminated material and make the retardation plate of winning in the face of linear polarization, basic parallel with the phase retardation axle of first retardation plate or meet at right angles substantially with it with the axis of homology of linear polarization.

Press in the material at glare-proof polarizing film of the present invention, antiglare layer is advantageously formed by have small irregular resin molding on its surface, formed by following mode: the sandblast by fine particle forms irregular on the sheet metal of polishing, electroless nickel plating is to form mould on the irregular surface of sheet metal, the surface imperfection of transfer mold is removed resin molding to the surface of transparent resin film with from mould.At this, transparent resin film can be the resin of UV-curable or the film of thermoplastic resin.

LCD of the present invention has good anti-dazzle performance and also reaches high-contrast and therefore excellence aspect the brightness of the image that shows and observability.Glare-proof polarizing film of the present invention presses material to have low haze, and is small irregular to reach anti-dazzle performance although it contains from the teeth outwards.Therefore, when it is applied to LCD, particularly during the VA mode LCD, glare-proof polarizing film of the present invention presses material can reach high contrast ratio.

Description of drawings

Figure 1A-1D is the schematic cross sectional views according to four examples of LCD of the present invention.

Fig. 2 is the schematic cross sectional views of pressing an example of material according to glare-proof polarizing film of the present invention.

Fig. 3 is the schematic cross sectional views of pressing another example of material according to glare-proof polarizing film of the present invention.

Fig. 4 shows the incident direction of the light that relates to antiglare layer and the perspective schematic view of reflection direction.

Fig. 5 relates to the example (wherein axis of ordinates is represented by logarithmic scale) of mapping from the 30 reflection of incident light reflection of light rates that enter of degree angles of the normal of the antiglare layer of Fig. 4 and reflection angle.

Fig. 6 is the perspective schematic view of algorithm that illustrates the tip of the bossing of determining antiglare film.

Fig. 7 shows the Voronoi figure of the tip of the bossing that uses antiglare film as an example of the Voronoi graduation of generatrix.

Fig. 8 A-8E schematically shows the step of the method for optimizing of production antiglare layer.

Fig. 9 is the schematic cross sectional views of the antiglare layer of electroless nickel plating after polishing.

Embodiment

By explaining the present invention with reference to the accompanying drawings.

With reference to figure 1, LCD of the present invention comprises liquid crystal cell 10, sandwiches a pair of linear polarization 20,21 of liquid crystal cell 10, and is placed on first retardation plate 26 between arbitrary linear polarization and the liquid crystal cell 10.Liquid crystal cell 10 comprises a pair of box base material 11,12 and is clipped in liquid crystal layer 17 between the box base material 11,12, and box base material 11,12 at them in the face of having electrode 14,15 separately on the surface each other.In the liquid crystal layer 17 of liquid crystal cell 10, liquid crystal molecule is being basically perpendicular in the direction of base material near base material usually from a base material to another orientation (or arrangement) when not applying voltage.That is, liquid crystal cell 10 is so-called perpendicular alignmnet (VA) mode liquid crystal boxes.

The refractive index of first retardation plate 26 satisfies relation: n _x＞n _y〉=n _z, n wherein _xAnd n _yBe principal refractive index and the n in the membrane plane _zIt is the refractive index in the thickness direction of film.At this, principal refractive index in the membrane plane be illustrated in wherein in the direction (phase retardation direction of principal axis) of maximization refractive index in membrane plane refractive index and perpendicular to the axial direction of phase retardation, promptly wherein minimize the refractive index in the direction (direction of principal axis mutually advances) of refractive index.The former is by n _xExpression, and the latter is by n _yExpression.Therefore, first retardation plate 26 is single shafts $(n_x>n_y\&cong;n_z)$ Or (the n of twin shaft _x＞n _y＞n _z).Placing first retardation plate 26 makes its phase retardation axle basic parallel with the axis of homology of adjacent linear polarizer 20 or 21 or meet at right angles substantially with it.Thus, can suppress the leakage of light.At this, term " substantially " expression of statement in " substantially parallel " or " meeting at right angles substantially " allow from parallel direction or right angle orientation ± deviations of 5 degree, although wish complete parallel or accurately meet at right angles.In preferred embodiments, place first retardation plate 26 and make that its phase retardation axle is basic parallel with the axis of homology of adjacent linear polarizer.

According to the present invention, second retardation plate 27 is placed on the box base material relative with first retardation plate 26 and between the linear polarization 20 or 21 of this side (Figure 1A and 1B), or is placed on (Fig. 1 C and 1D) between first retardation plate 26 and the box base material 10.The refractive index of second retardation plate 27 satisfies relation: $n_x\&cong;n_y>n_z,$ N wherein _x, n _yAnd n _zIdentical with above definition.This means that second retardation plate 27 is the films that have negative single shaft and optic axis in normal direction, or the c-plate.This " $n_x\&cong;n_y$ " mean n _xAccurately equal n _y, promptly by length of delay R in the plane of formula (1) expression ₀Be 0 (zero), but arrangement can actually be ignored in the plane, promptly in the plane length of delay in about 10nm, preferably in about 5nm.

In addition, according to the present invention, the antiglare layer 30 that has predetermined surface shape and give LCD special optical performance is placed on the surface of linear polarization 20, linear polarization 20 and surface in the face of liquid crystal cell 10, promptly show on the side (observation side) the surface relatively.Antiglare layer has and forms many small irregular anti-dazzle surfaces thereon, and it is 5% or littler against the mist degree of vertical incidence light, when under the incident angle of 45 degree light, using three optical frequency coms forming by concealed wire and bright line to measure the reflection sharpness, total reflection sharpness is 50% or littler, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (30) under the reflection angle of 30 degree is 2% or littler, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (40) under the reflection angle of 40 degree is 0.003% or littler, and R (〉=60) is 0.001 or littler with the ratio of R (30), wherein R (〉=60) is the incident light that enters against under the incident angle of 30 degree, reflectivity under 60 degree or bigger reflection angle in any direction, the surface of antiglare layer is 50 μ m by average area ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.Below will explain antiglare layer in detail.

In Fig. 1, when antiglare layer 30 being provided on the demonstration side that is relating to liquid crystal cell 10 and showing the laminated material of side line polarizer 20 and retardation plate 26 and/or 27, the laminated material of antiglare layer 30, demonstration side line polarizer 20 and retardation plate 26 and/or 27 is shown as glare-proof polarizing film and presses material 40 or 41.When providing linear polarization 21 and retardation plate 26 and/or 27 on the side of the rear surface of liquid crystal cell 10, the laminated material of linear polarization 21 and retardation plate 26 and/or 27 is shown as rear surface side glare-proof polarizing film and presses material 50.

Usually adopt bonding agent 60 bonding glare-proof polarizing films to press materials 40 or 41 and liquid crystal cell 10, and rear surface side polarizer 21 or rear surface side glare-proof polarizing film are pressed material 50 and liquid crystal cell 10.As bonding agent, use usually to have the bonding agent such as the acrylic-type adhesive binder of good transparency.Usually, provide back light 70 to arrive liquid crystal cell on the rear surface side of rear surface side polarizer 21 with supply light.

Linear polarization 20,21 can be normally used polarizing coating or plate, and its allows the linearly polarized photon of vibration in one of the both direction be perpendicular to one another in membrane plane by therebetween, and it is absorbed in the linearly polarized photon that vibrates in another of both direction simultaneously.The object lesson of this linear polarization is the polyvinyl alcohol film of uniaxial tension, and it is by Senior Two look dyeing and crosslinked by boric acid.Can use and comprise that iodine is as the iodine type polarizer of high luminance relay dyestuff or comprise the dye type polarizer of organic two look dyestuffs as Senior Two look dyestuff.Linear polarization can be a polyvinyl alcohol (PVA) type polarizer itself, or has the polyvinyl alcohol (PVA) type polarizer of the diaphragm of transparent polymer such as tri acetyl cellulose at least on one surface.

Owing to provide antiglare layer 30 on a surface that shows side line polarizer 20, it can work the function of the diaphragm that shows side line polarizer 20.When providing retardation plate 26 or 27 on another surface that is showing side line polarizer 20, it can play the function of the diaphragm of linear polarizer 20.On a surface, provide antiglare layer 30 at face side linear polarization 20; and when shown in Fig. 1 D, another surface of face side linear polarization 20 being directly bonded to liquid crystal cell 10, on the surface of the linear polarization 20 relative, provide said protection film at least with antiglare layer 30 by bonding agent 60.

When providing retardation plate 26 or 27 on the surface of rear surface side polarizer 21 as shown in Figure 1A, 1B and 1D, it can play the function of the diaphragm of linear polarizer 21.In the case, preferably on another surface of linear polarization 21, provide said protection film.When on rear surface side polarizer 21, not when laminate layers such as retardation plate, preferably on two surfaces of linear polarization 21, providing said protection film.

The refractive index of first retardation plate 26 satisfies relation: n _x＞n _y〉=n _z, n wherein _x, n _yAnd n _zIdentical with above definition.Depend on the characteristic of liquid crystal cell 10 etc., length of delay R in the plane ₀Be selected from 30-300nm.Preferred R ₀With R _ThRatio surpass 1 but be no more than 2.The retardation plate that can under appropriate condition, have this specific character by single shaft or biaxial stretch-formed transparent resin film production with positive anisotropic refraction rate.Example with transparent resin of positive anisotropic refraction rate comprises acyl group cellulose such as tri acetyl cellulose etc., cyclic olefin resins, polycarbonate etc.Cyclic olefin resins is to comprise the resin as monomer such as cycloolefin such as norborene, dimethylene octahydro naphthalene etc.The example of commercially available cyclic olefin polymer is ARTON (trade name) (available from JSR Corporation), ZEONOR  and ZEONEX  (both are all available from ZEONCorporation) etc.In these transparent resins, preferably use tri acetyl cellulose and cyclic olefin resins, because they have low photoelastic coefficient and cause the variation of less plane internal characteristic owing to the thermal strain under service condition.

The refractive index of second retardation plate 27 satisfies relation: $n_x\&cong;n_y>n_z,$ N wherein _x, n _yAnd n _zIdentical with above definition.Can be by on base material, applying plate-like (discotic) liquid crystal, by on base material, applying cholesteric liquid crystal with narrow pitch, by on base material, forming the layer of inorganic layered compounds such as mica, by continuing or successively biaxial-oriented resin molding, or by providing the solvent cast film that do not stretch to obtain this delay performance.The preferred R of second retardation plate 27 ₀Be 0-10nm, and R _ThBe 50-300nm.The material of the base material of the material of retardation plate 27 or retardation plate 27 can be unrestricted.Preferably, retardation plate 27 can have the layer of lamellar compound, and this layer can freely form and adopt this layer easily to control R with low cost _ThExample with commercially available retardation plate of this delay performance comprise " VAC film " (trade name, available from SumitomoChemical Co., Ltd.), " FUJITAC " (trade name is available from FUJIFILMCorporation) etc.Because second retardation plate 27 has $n_x\&cong;n_y$ The index of refraction relationship and the therefore R of about 0 (zero) ₀So, needn't define the shaft angle degree of its phase retardation axle, have very little R even work as it ₀The time.

The embodiment of the LCD shown in Figure 1A comprises liquid crystal cell 10, presses material 40 and the rear surface lateral deviation vibrating diaphragm laminated material 50 on another surface of liquid crystal cell 10 (rear surface side) at the glare-proof polarizing film on the surface of liquid crystal cell 10 (demonstration side surface).In this embodiment, glare-proof polarizing film presses material 40 to comprise antiglare layer 30, linear polarization 20 and first retardation plate 26, they adopt this order from the farthest side lamination from liquid crystal cell 10, and rear surface lateral deviation vibrating diaphragm laminated material 50 comprises second retardation plate 27 and linear polarization 21, and they adopt this order from the farthest side lamination from liquid crystal cell.

The embodiment of the LCD shown in Figure 1B comprises liquid crystal cell 10, presses material 40 and the rear surface lateral deviation vibrating diaphragm laminated material 50 on another surface of liquid crystal cell 10 (rear surface side) at the glare-proof polarizing film on the surface of liquid crystal cell 10 (demonstration side surface).In this embodiment, glare-proof polarizing film presses material 40 to comprise antiglare layer 30, linear polarization 20 and second retardation plate 27, they adopt this order from the farthest side lamination from liquid crystal cell, and rear surface lateral deviation vibrating diaphragm laminated material 50 comprises first retardation plate 26 and linear polarization 21, and they adopt this order from the farthest side lamination from liquid crystal cell.Difference between the embodiment of Figure 1A and the embodiment of Figure 1B is to put upside down the position of first retardation plate 26 and second retardation plate 27.

The embodiment of the LCD shown in Fig. 1 C comprises liquid crystal cell 10, presses material 40 and the linear polarization 21 on another surface of liquid crystal cell 10 (rear surface side) at the glare-proof polarizing film on the surface of liquid crystal cell 10 (demonstration side surface).In this embodiment, glare-proof polarizing film presses material 40 to comprise antiglare layer 30, linear polarization 20, first retardation plate 26 and second retardation plate 27, and they adopt this order from the farthest side lamination from liquid crystal cell.

The embodiment of the LCD shown in Fig. 1 D comprises liquid crystal cell 10, presses material 41 and the rear surface lateral deviation vibrating diaphragm laminated material 50 on another surface of liquid crystal cell 10 (rear surface side) at the glare-proof polarizing film on the surface of liquid crystal cell (demonstration side surface).In this embodiment, glare-proof polarizing film presses material 41 to comprise antiglare layer 30 and linear polarization 20, they adopt this order from the farthest side lamination from liquid crystal cell, and rear surface lateral deviation vibrating diaphragm laminated material 50 comprises second retardation plate 27, first retardation plate 26 and linear polarization 21, and they adopt this order from the farthest side lamination from liquid crystal cell.In the embodiment of Fig. 1 C, the laminated material of linear polarization 20, first retardation plate 26 and second retardation plate 27 is provided on the display surface side of liquid crystal cell 10, and on linear polarization 20, provide antiglare layer 30, and in the embodiment of Fig. 1 D, the laminated material of second retardation plate 27, first retardation plate 26 and linear polarization 21 is provided on the side of the rear surface of liquid crystal cell 10, and on the display surface side of liquid crystal cell 10, does not provide retardation plate.

In glare-proof polarizing plate of the present invention, shown in Figure 1A, 1B and 1C, adopt this order lamination antiglare layer 30, linear polarization 20 and retardation plate 26 and/or 27.In Fig. 2, schematically show the xsect of independent glare-proof polarizing laminated material 40, wherein retardation plate 25 expression first retardation plate 26 and/or second retardation plates 27.That is, retardation plate 25 can be that refractive index satisfies relation: n _x＞n _y〉=n _zRetardation plate (promptly above explain first retardation plate), or refractive index satisfies relation: $n_x\&cong;n_y>n_z$ Retardation plate (promptly above explain second retardation plate), n wherein _x, n _yAnd n _zIdentical with above definition.

Perhaps, the lamination refractive index satisfies relation: n as shown in Figure 3 _x＞n _y〉=n _z First retardation plate 26 and refractive index satisfy relation: $n_x\&cong;n_y>n_z$ Second retardation plate.In this embodiment, placing first retardation plate 26, to make it face linear polarization 20 and its phase retardation axle basic parallel with the axis of homology of linear polarization 20 or meet at right angles substantially with it.

Antiglare layer 30 is 5% or littler against the mist degree of vertical incidence light, when under the incident angle of 45 degree light, using three optical frequency coms forming by concealed wire and bright line to measure the reflection sharpness, total reflection sharpness is 50% or littler, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (30) under the reflection angle of 30 degree is 2% or littler, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (40) under the reflection angle of 40 degree is 0.003% or littler, and R (〉=60) is 0.001 or littler with the ratio of R (30), wherein R (〉=60) is the incident light that enters against under the incident angle of 30 degree, reflectivity under 60 degree or bigger reflection angle in any direction, and the surface of antiglare layer 30 is 50 μ m by average area ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.

Now, explain antiglare layer 30 in detail.Antiglare layer 30 is preferably by the method productions of following explanation, and has and form small irregular anti-dazzle surface thereon, and is 5% or littler against the mist degree of vertical incidence light.Although antiglare layer 30 has form small irregular on its surface, when it was applied to LCD, it had low haze and therefore can suppress the reduction of contrast.

Antiglare layer 30 is 50% or littler against total reflection sharpness of 45 degree incident lights.The reflection sharpness can be measured by the method for explanation among the JIS K 7105.In the method for JIS K 7105, definition and use four optical frequency coms forming by concealed wire and bright line, each width of this optical frequency com is respectively 0.125mm, 0.5mm, 1.0mm and 2.0mm (ratio of concealed wire width and bright line width is 1: 1).In the present invention, in the reflection sharpness of using four optical frequency coms to measure, use width not count summation, because use the numerical value of the less feasible measurement of reflection sharpness that this optical frequency com of antiglare layer of the present invention obtains to have bigger error as the reflection sharpness that the optical frequency com of 0.125mm obtains.Therefore, in the present invention, always reflect sharpness and be to use three optical frequency coms being made up of concealed wire and bright line to measure the summation of the reflection sharpness that obtains, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm.Therefore, the possible maximal value according to total reflection sharpness of above definition is 300%.When total reflection sharpness surpassed 50%, the image of reflected image such as light source made glare-proof polarizing film of the present invention press the anti-dazzle performance degradation of material.

When total reflection sharpness is 50% or more hour, may be difficult to only estimate the superiority of anti-dazzle performance from total reflection sharpness, because if always reflect sharpness less than 50% or littler, each reflection sharpness that each optical frequency com that uses width to be respectively 0.5mm, 1.0mm and 2.0mm is measured makes and can not ignore because the fluctuation of the reflection sharpness that measuring error is brought up to about 10-20%.

Then, explain the dependence of reflectivity to reflection angle by the reference Figure 4 and 5, it uses another standard of the anti-dazzle performance that judges.Fig. 4 shows the incident direction of the light that relates to antiglare layer (antiglare film) and the perspective schematic view of reflection direction.According to the present invention, in R (30) is defined as direction under the incident angles of 30 degree, promptly in minute surface direction 37, relate to when the catoptrical reflectivity of the incident light 36 that under the angles of 30 degree of the normal 35 of antiglare layer 30, enters, R (30) is 2% or littler.Specular reflectance R (30) is preferably 1.5% or littler, and more preferably 0.7% or littler.When specular reflectance R (30) surpassed 2%, antiglare layer may not have enough anti-dazzle performances made the observability deterioration of display.In Fig. 4, catoptrical direction is represented by numeral 38 under arbitrarily angled θ, and exists in plane 39 in catoptrical direction 37 and 38 during the albedo measurement, and plane 39 comprises the normal 35 of incident direction of light 36 and film.

Fig. 5 relates to the example of mapping from the reflectivity of the reflected light 38 of 30 incident lights 36 that enter of degree angles of the normal 35 of the antiglare layer 30 of Fig. 4 and reflection angle.The figure that shows the relation of reflectivity and reflection angle, or the reflectivity that reads under each reflection angle from this figure is called " reflection distributes ".Shown in the figure of Fig. 5, specular reflectance R (30) relates to the reflectance peak of the incident light 36 that enters under the angles of 30 degree, and reflectivity tends to reduction when reflection direction departs from the minute surface direction.

According to the present invention, when R (40) was defined as reflectivity the direction that is relating in 40 degree incident angles of the incident light 36 that enters under the angles of 30 degree of the normal 35 of the antiglare layer shown in Fig. 4 30, R (40) was 0.003% or littler.When R (40) surpassed 0.003%, the image of demonstration tended to bleach.Therefore, R (40) is preferably so not big.When R (40) too hour, antiglare layer may not have enough anti-dazzle performances yet.Therefore, R (40) preferably is 0.00005% at least.Yet, may quite be difficult to the preferable range of the strict R (40) of determining, because reflect or the subjective performance of determining and be the reflection user's preferences by eyes that bleaches.

In addition, according to the present invention, the ratio of R (〉=60) and R (30) is 0.001 or littler, and wherein R (〉=60) is the reflectivity in any direction under 60 degree or bigger reflection angle.This ratio preferably 0.0005 or littler, more preferably 0.0001 or littler.At this, " at any direction under 60 degree or the bigger reflection angle " is illustrated in the reflection angle between 60 degree and 90 degree.The antiglare film of being produced by following method has typical case shown in Figure 5 and reflects distribution, and under the situation of this antiglare film, reflectivity has its peak value usually and reduces gradually when reflection angle increases in the minute surface direction.Therefore, R (〉=60)/R (30) ratio can be by R (60)/R (30) than value representation, and wherein R (60) is the reflectivity under the reflection angle of 60 degree.When R (〉=60)/R (30) ratio surpassed 0.001, antiglare layer looked like the observability deterioration that makes display screen of white.That is, when on display screen, showing black white image, look like white by the whole screen of reflection exterior light when providing antiglare layer in the screen front.

Under the situation that reflection shown in Figure 5 distributes, specular reflectance R (30) is about 0.4%, and R (40) is about 0.0006%, and R (60) is about 0.00003%.

Except that the special reflecting of above explanation distributes, be 50 μ m by average area according to the surface of antiglare layer of the present invention ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.

Explain the algorithm at the tip of bossing on the irregular surface of determining antiglare layer.When notice focuses on the lip-deep arbitrfary point of antiglare layer, if there is no highly be higher than the arbitrfary point point of arbitrfary point height on every side, and the height of arbitrfary point is higher than the intermediate value between the peak height and minimum point height on the irregular surface on the irregular surface, and then the arbitrfary point is the tip of bossing.Particularly, as shown in Figure 6, choose the lip-deep arbitrfary point 91 of antiglare layer.Using point 91 to draw radius as the center of circle on the plane parallel with the basic plane 93 of antiglare layer is the circle of 2 μ m-5 μ m.The height of on not existing by the surface 93 in antiglare layer drawn circular projection being described is higher than the point of point 91 height in the circle 94, and when putting 91 height and being higher than on the irregular surface intermediate value between the peak height and minimum point height, judging point 91 is the tip of bossing.In the case, the circle 94 of projection has such radius makes meticulous irregular being not counted on the sample surfaces, and circle 94 does not comprise a plurality of bossings.Therefore, the preferably about 3 μ m of radius of circle 94.By above method, also can count the number of bossing of the irregular surface of per unit area.

Number by the bossing of above method counting is preferably 50-150 in the zone of 200 μ m * 200 μ m, do not cause reflection to reach good observability or bleach.If the number of the bossing on the irregular surface of antiglare layer is less, produces dazzle by pixel interference and make the image that shows be difficult to see, particularly when being used in combination glare-proof polarizing film pressure material with display device with high definition.In addition, the texture deterioration of display image.When the number of bossing was too big, the angle of inclination of irregular shape became and makes that very suddenly image tends to bleach.The number of the bossing in 200 μ m * 200 μ m zones is preferably 120 or littler and 70 or bigger.

Now, explain the Voronoi graduation.When several points (being generatrix) when distributing in the plane, can the figure on graduation plane be Voronoi figure by determining the immediate generatrix in arbitrfary point on the plane, and the graduation on plane is called the Voronoi graduation by this figure.Fig. 7 illustrates and uses the surface to go up the example of the tip of bossing as the Voronoi graduation on the surface of the antiglare layer of generatrix.In Fig. 7, point 95 is generatrixs, and comprises that each polygon 96 of a generatrix is the zones that formed by the Voronoi graduation, and this polygon is called Voronoi zone or Voronoi polygon, and hereinafter referred to as the Voronoi polygon.Below will be explained in the zone 97 of blackening in the periphery of Fig. 7.In Voronoi figure, the number of generatrix equals the polygonal number of Voronoi.For easy, in Fig. 7, a part and the polygonal part of generatrix are represented by numeral 95 and 96 respectively.

For calculating the polygonal average area of Voronoi that uses the tip of bossing to obtain by the Voronoi graduation as generatrix, adopt suitable device such as confocal microscope, interference microscope, atomic force microscope (AFM) etc. to observe the surface configuration of antiglare layer, and definite D coordinates value.Then, according to the surface of following algorithm Voronoi graduation antiglare layer and calculate the polygonal average area of Voronoi.That is, determine the tip of bossing on the irregular surface of antiglare layer according to above algorithm and then with tip projection on the basic plane of antiglare layer of bossing.Thereafter, all three-dimensional coordinates projection on basic plane that will obtain by the measurement of surface configuration, and all subpoints are assigned to immediate generatrix to carry out the Voronoi graduation.Calculate polygonal area of all Voronoi and equalization to obtain the polygonal average area of Voronoi.In this measured, the polygonal area of Voronoi that counts out contiguous measurement zone border was with minimum error.Promptly under the situation of Fig. 7, the Voronoi polygon 97 of the blackening on contiguous measurement zone border is not included in the calculating of average area.In addition, for minimizing measuring error, preferably be to calculate the polygonal mean value of Voronoi at least in three zones of 200 μ m * 200 μ m in each zone, and with all mean values equalization and as measured value once more.

As mentioned above, in the present invention, be that the polygonal average area of Voronoi of generatrix is 50 μ m with the tip of bossing on the irregular surface of antiglare layer ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²When the polygonal average area of Voronoi less than 50 μ m ²The time, the pitch angle of the shape of the surface imperfection of antiglare layer becomes and makes that very suddenly image tends to bleach.When the polygonal average area of Voronoi surpasses 1500 μ m ²The time, the irregular surface shape roughening of antiglare layer, the feasible texture deterioration that produces dazzle and image is particularly when being used in combination glare-proof polarizing film pressure material with the display device with high definition.

Use can be calculated the arithmetic mean height Pa and the maximum cross section height Pt of cross-section curve at the three-dimensional coordinate of this measurement, and they are defined by JIS B 0601 (=ISO 4287).In addition, the height of each point can adopt histogrammic formal specification on the irregular surface of antiglare layer.For reach good observability do not cause the reflection or bleach, the arithmetic mean height Pa of cross-section curve is preferably 0.08 μ m-0.15 μ m, and maximum cross section height Pt is preferably 0.4 μ m-0.9 μ m.When arithmetic mean height during less than 0.08 μ m, the surface of antiglare layer flattens substantially and makes it not have anti-dazzle performance.When arithmetic mean height Pa surpassed 0.15 μ m, the surface configuration roughening of antiglare layer made to produce such as bleaching and the problem of dazzle.As maximum cross section height Pt during less than 0.4 μ m, the surface of antiglare layer flattens substantially and makes it not have anti-dazzle performance once more.When maximum cross section height Pt surpassed 0.9 μ m, the surface configuration roughening of antiglare layer once more made to produce such as bleaching and the problem of dazzle.

When the height put on the irregular surface that adopts histogrammic formal specification antiglare layer, histogrammic peak value preferably be in intermediate value (50% highly) between peak height on the irregular surface (100% height) and the minimum point height (0% height) ± 20% scope in.This means histogrammic peak value preferably be at the highest notch the height and the difference in height of minimum point height 30% and 70% between scope in.If peak value not intermediate value ± 20% scope in, in other words, peak value be in greater than 70% or scope less than 30% peak height in, the then surface configuration roughening of antiglare layer makes dazzle undesirably to occur.In addition, the texture of outward appearance tends to deterioration.

Histogram for the explanation height, determine the highest and minimum point of height on the surface of antiglare layer (antiglare film), and subsequently with the difference (being the height of measurement point) of each measurement point height and minimum point height divided by the difference (being maximum height difference) of peak height and minimum point height to obtain the relative height of each point.Then in histogram with maximum height be 100% and minimum altitude be that 0% relative height that draw to obtain is to obtain the relative position of each point in the histogram.Should be with the histogram segmentation avoiding the influence of data error, and usually with its graduation into about 10-30 section.For example, will be from minimum point (0% height) to peak the span of (100% height) with 5% interval graduation, and the position of definite peak value.

The anti-dazzle surface that constitutes the antiglare layer with above-mentioned characteristic has by the shape that does not have the irregular covering on flat plane substantially.Anti-dazzle surface with this surface configuration can advantageously be produced by following mode: the impact by fine particle forms irregular on the sheet metal of polishing, electroless nickel plating is to form mould on the irregular surface of sheet metal, the surface imperfection of transfer mold arrives the surface of transparent resin film, and removes the irregular transparent resin film that contains transfer from mould.

By explaining method for optimizing with reference to figure 8 by above method production antiglare layer (antiglare film), it schematically show from produce contain on its surface irregular mould to use sheet metal as mold with the irregular xsect of transferring to the step of resin molding from mould.Fig. 8 A is presented at the mirror polish xsect of sheet metal 81 afterwards, and it has polished surface 82.Adopt fine particle impact (or sandblast) irregular the polished surface 82 of sheet metal 81 on surface 82, to form.The xsect of sheet metal 81 after Fig. 8 B is illustrated schematically in and impacts, it has the small recessed portion 83 of semisphere.Then, will have the irregular surface that is formed by impact adopts the nickel electroless plating to reduce the irregular degree of depth.Fig. 8 C is illustrated schematically in the xsect of sheet metal 81 behind the electroless plating of nickel.In Fig. 8 C, on the surface of sheet metal 81, form nickel coating 84 with small recessed portion, and the surface 86 of nickel coating 84 has irregular, compare its degree of depth with recessed surperficial 83 of Fig. 8 B and reduce by the electroless plating of nickel, even metal sheet surface irregularly shaped slows down and.Therefore, when adopting the nickel electroless plating to have hemispherical shape small recessed surperficial 83 time of sheet metal 81, can obtain to be suitable for basic uneven plane of having of production antiglare film and irregular mould, this antiglare film has preferred optical property.

Fig. 8 D schematically shows the irregular step of transferring to resin molding of the mould of Fig. 8 C that will form in the step formerly.That is, on the irregular surface of nickel coating 84, form resin molding.Thus, obtain to have the erose film 30 of transfer.Film 30 can be made up of the single film of thermoplastic transparent resin.In the case, will the thermoplastic resin film under heating status be pressed onto the irregular surface 86 of mould and squeeze and molding by hot pressing.Perhaps, shown in Fig. 8 D, film 30 can be made up of the resin bed 33 of transparent base film 32 and the ionization radiation curing of lamination on the surface of base material film 32.In the case, the resin bed 33 that ionization radiation is solidified contact with the irregular surface 86 of mould and by ionization radiation irradiation with curing resin layer 33.Thus, mould irregularly shaped transferred to the resin bed 33 that ionization radiation solidifies.Below explain in detail these films.Fig. 8 E is illustrated schematically in from mould and removes the xsect of film 30 afterwards.

In method shown in Figure 8, the preferred example that is used for the metal of production mould comprises aluminium, iron, copper, stainless steel etc.Among them, the easy metal by being out of shape by the impact of fine particle does not preferably promptly have those of high rigidity too.Especially, preferably use aluminium, iron, copper etc.Consider cost, be more preferably aluminium and soft iron.Mould can be the form of flat sheet metal or cylindrical metal volume.When using the scroll mould, can continuously production antiglare film.

Adopt fine particle impact or sandblast to have the metal of polished surface.Especially, preferably with medal polish near the state of minute surface because usually for example by cutting or grind sheet metal or volume machine work reaching required precision, and processing mark usually remains on the surface of metallic object thus.If keep dark mark, the surface of metallic object can still can have the mark of trace after adopting fine particle impact metal surface, because the degree of depth of some marks makes the dark mark of trace can have unpredictable influence to the optical property of antiglare layer greater than the irregular degree of depth that adopts fine particle to form.

The method of polished metal surface is unrestricted, and can use any mechanical buffing, electropolishing and chemical polishing.The example of mechanical buffing comprises superfinishing, polishes, fluid polishing, polishing etc.With regard to center line average surface roughness Ra, the roughness of metal surface is 1 μ m or littler after polishing, preferred 0.5 μ m or littler, more preferably 0.1 μ m or littler.When Ra was too big, the influence of surfaceness may keep made the metal surface distortion by the impact of fine particle after before the distortion.The lower limit of Ra can be unrestricted, but it can be practically from process time, and the viewpoint of processing cost etc. limits.

The metal surface is impacted the preferably sandblast job operation of method of fine particle.The example of sandblast job operation comprises sandblast, shot-peening, liquid honing etc.As the particle that is used for these job operations, shape near ball those than have a sharp edges those be preferred.In addition, the particle of preferred hard material is because they are not broken and form sharp edges during processing.The preferred example that satisfies the ceramic particle of these performances is spherical zircite pearl, alumina bead etc.The preferred example of metallics is bead of being made by steel, stainless steel etc.In addition, can use the particle that comprises pottery or bead that on resin binder, carries.

When particle mean size is 10-75 μ m, the particle of preferred 10-35 μ m, particularly spherical fine particle can be produced the antiglare film that satisfies form factor during as the fine particle that will impact on the metal surface, and this form factor comprises 50 μ m ²-1500 μ m ², preferred 300 μ m ²-1000 μ m ²According to the present invention the definition the polygonal average area of Voronoi.As fine particle, have those of uniform particle size, promptly monodisperse particle is particularly preferred.When the particle mean size of fine particle too hour, be difficult on the metal surface, form gratifying irregular.In addition, the pitch angle of irregular shape becomes and makes that very suddenly image tends to bleach.When the particle mean size of fine particle was too big, dazzle may appear in surface imperfection coarse the making that become, and the texture of image may deterioration.

To have the irregular metal surface that is formed by said method then adopts the nickel electroless plating to reduce the irregular degree of depth.The kind of the irregular size that the degree that the degree of depth reduces depends on the kind of metal, formed by sandblast etc. and the degree of depth, nickel plating and thickness etc.The greatest factor that controlling depth reduces degree may be the thickness of nickel plating.If the thickness of electroless nickel plating is too little, may not can effectively reduce the irregular degree of depth that forms by sandblast etc., make and may improve optical property deficiently with the irregular antiglare film that shifts from mould.When the thickness of electroless nickel plating was too big, throughput rate reduced.Therefore, the thickness of electroless nickel plating is preferably about 3 to 70 μ m, and more preferably at least 5 μ m are to 50 μ m or littler.

For form plating layer on the metal surface, preferred employing can form the electroless plating of the plating layer with macroscopical uniform thickness on the surface of sheet metal or volume, and the electroless nickel plating of the plating layer of high rigidity particularly is provided.The preferred example of electroless nickel plating comprises uses gloss nickel plating, the nickel-phosphor alloy of the plating bath that comprises polishing material such as sulphur to plate (low-phosphorous type, middle phosphorus type or high phosphorus type), nickel-boron alloy plating etc.

If adopt the hard plating of describing among the JP-A-2002-189106, electrolysis chromium plating especially, then electric field tends to make that in the edge focusing of sheet metal or volume the thickness of coating metal can be different between center and peripheral.Therefore, have the irregular of the even degree of depth if formed by sandblast etc. on the whole surface of sheet metal or volume, then the degree of depth by plating reduces degree and can change everywhere on the surface of sheet metal or volume, and the result is irregular change in depth.Therefore, the electrolysis plating is not preferred for the present invention.

In addition, hard plating can form rough surface and therefore be unsuitable for producing the mould that is used for the production antiglare layer.For removing rough surface, polish the surface of hard plating usually.Yet the polishing of such plating surface as explained below is undesirable in the present invention.

Yet the present invention is not precluded within after the electroless nickel plating, forms flash plating chromium in outmost surface, and promptly so-called rapid chrome plating is to increase skin hardness.If carry out rapid chrome plating, then the thickness of rapid chrome plating layer is as far as possible little of avoiding the deterioration as the shape of the electroless nickel layer of priming paint, and should be preferably 3 μ m or littler, more preferably 1 μ m or littler.

Equally, not preferably polishing metal plate or volume after the plating in the present invention are as described in the JP-A-2002-90187.Make that the optical property of antiglare layer may deterioration if the surface of polishing plating, extreme outer surfaces can have flat part, and almost can not control irregular shape, because the number of shape controlling factor increases with good repeatability.Fig. 9 schematically shows sheet metal, and the irregular surface that has by impacting fine particle formation by polishing forms flat plane thereon, reduces this irregular degree of depth by electroless nickel plating.That is, Fig. 9 wherein polishes the surface of nickel coating 84 corresponding to the sheet metal of the electroless plating of Fig. 8 C.Because polishing is ground the part of the bossing of the surface imperfection 86 on the nickel coating 84 that forms on the sheet metal 81, and is formed flat plane 89 thus.

According to the present invention, shown in Fig. 8 C, use on its surface, to be formed with irregular mould, and the surface of irregular shape being transferred to film 30 is to form anti-dazzle surface.In the case, can the surface configuration of mould be transferred to the film surface by any conventional method.For example, thermoplastic resin film is hot pressed into the irregular surface 86 of mould the surface imperfection of mould is transferred to the surface of resin molding; The coat close adhesion of the resin that the resin-coating that ionization radiation is solidified on the surface of transparent resin film and is then solidified the ionization radiation of its uncured state is to the irregular surface 86 of mould and with the resin that solidifies ionization radiation and solidify the surface imperfection of mould is transferred to the surface of resin of the ionising radiation curing of curing by the transparent resin film irradiation by ionising radiation.After shifting, shown in Fig. 8 E, remove striping to obtain antiglare film 30 from mould.As preventing the viewpoint of surface crack, latter's method of the resin of ionization radiation curing is used in preferred employing from physical strength.

The transparent resin that is used for above latter's method can be any film with basic optical transparency.The object lesson of transparent resin comprises celluosic resin (as tri acetyl cellulose, diacetyl cellulose, cellulose-acetate propionate etc.), cyclic olefin polymer, polycarbonate, polymethylmethacrylate, polysulfones, polyethersulfone, Polyvinylchloride etc.Cyclic olefin polymer is to comprise that cycloolefin such as norborene, dimethylene octahydro naphthalene etc. are as polymer of monomers.The example of commercially available cyclic olefin polymer is ARTON (trade name) (available from JSR Corporation), ZEONOR  and ZEONEX  (both are available from ZEON Corporation) etc.

Among them, the film that will have thermoplastic transparent resin such as polymethylmethacrylate, polycarbonate, polysulfones and polyethersulfone and cyclic olefin polymer is also peeled off thus the surface imperfection of mould is transferred to the film surface from mould to the mould with surface imperfection subsequently in suitable temperatures system or pressurized adhesion.In addition, polarization plates also can directly be transferred to the surface imperfection of mould the surface of polarization plates as hyaline membrane.

When the resin of ionization radiation curing is used for the surface imperfection of transfer mold, preferably use the polymkeric substance of the compound that in molecule, has at least one acryloxy.For increasing the physical strength of antiglare layer, more preferably use acrylate with at least three functionality, promptly have the compound of at least three acryloxies.The object lesson of this compound comprises trimethylolpropane triacrylate, trimethylolethane trimethacrylate acrylate, glycerol tri-acrylate, pentaerythritol triacrylate, tetramethylol methane tetraacrylate, dipentaerythritol acrylate etc.For giving pliability to antiglare layer, preferably use the acrylate compounds that in molecule, contains ammonia ester bond to prevent the destruction of antiglare layer.The object lesson of this acrylate compounds is the urethane acrylate with following structure: two molecules have at least one hydroxyl except that acryloxy in molecule compound (as trimethylolpropane diacrylate, pentaerythritol triacrylate etc.) adds in the diisocyanate cpd (as hexamethylene diisocyanate, toluene diisocyanate etc.).In addition, can use other acrylic type resin, as ether acrylate polymer, ester acrylate polymer etc. by ionising radiation free radical polymerization and curing.

In addition, the resin of the ionization radiation of cationically polymerizable curing such as epoxy resin, oxetane resin etc. can be as give irregular resin to it after solidifying.In the case, an example of the resin that the ionization radiation of this cationically polymerizable solidifies can prepare from potpourri, this potpourri comprises the multifunctional oxetane compound of cationically polymerizable as 1, two [(3-ethyl-3-oxetanes ylmethoxy) methyl] benzene of 4-, two (3-ethyl-3-oxetanes ylmethyl) ether etc. and cationic photopolymerization initiating agent are as (4-aminomethyl phenyl) [4-(2-methyl-propyl) phenyl] iodonium hexafluorophosphate  etc.

When acrylic type resin that the radiation curing ionization radiation that adopts the UV ray solidifies, use the UV radical polymerization initiator, it produces free radical with initiated polymerization and curing reaction when the UV x radiation x.Usually with of the side radiation of UV ray from glass mold or transparent resin film.Therefore, when from the side radiation UV ray of transparent resin film, use the polymerization initiator that causes the free-radical generating reaction from visible light to the UV optical range, to cause the free-radical generating reaction in the UV beam wavelength scope, wherein light can pass through film.

The example that is caused the UV ray radical polymerization initiator of free-radical generating reaction by the radiation of UV ray comprises 1-hydroxycyclohexylphenylketone, 2-methyl isophthalic acid-[4-(methyl mercapto) phenyl]-2-morpholino propane-1-ketone, 2-hydroxy-2-methyl-1-phenyl-propane-1-ketone etc.When the UV ray is shone by the transparent resin film that comprises the agent of UV radiation absorption, use the radical photopolymerization initiating agent of absorption region in visible wavelength range.The example of this initiating agent comprises two (2,4, the 6-trimethylbenzoyl) phenylphosphine oxide, two (2,6-dimethoxy benzoyl)-2,4,4-tri-methyl-amyl phosphine oxide, 2,4,6-trimethylbenzoyl diphenyl phosphine oxide etc.

When mould is when having the form of the flat board that has small irregular plating surface in its surface, allow the irregular surface of mould to contact with the transparent resin rete that has the resin that is coated to the uncured ionization radiation curing on it, make the resin that ionization radiation solidifies the coat close adhesion to the irregular surface of mould and then with ionising radiation from the side-irradiation of transparent resin film to solidify the resin that ionization radiation solidifies.Thereafter, the cured layer of the resin that ionization radiation is solidified is removed from mould with transparent resin base material film.Thus, mould irregularly shaped transferred to the cured layer of the resin that the ionization radiation that carries solidifies on transparent resin film.

When mould is to have the form of the volume that has small irregular plating surface on its circumferential surface, and when mould irregularly shaped transferred to the resin that ionization radiation solidifies, the resin bed that ionization radiation is solidified and the laminated material of transparent resin film adopt ionization radiation irradiation, and resin bed that ionization radiation solidifies is removed from mould with transparent resin film with the cured layer of the circumferential surface contact of scroll mould and the resin that then ionization radiation solidified.Thus mould irregularly shaped transferred to continuously the cured layer of the resin that the ionization radiation that carries solidifies on transparent resin film.

Ionising radiation can be UV ray or electron beam.From handling easy and safe viewpoint, preferably use the UV ray.As the light source of UV ray, preferably use high-pressure sodium lamp, metal halide lamp etc.When shining by the transparent resin film that comprises the UV absorbing agent, the preferred especially metal halide lamp that comprises a large amount of visible light components that uses.In addition, can preferably use " V-Bulb " and " D-Bulb " (both are trade name) (available from Fusion UV SystemsJAPAN KK).The dosage of ionising radiation can be removed the film of curing from mould to a certain degree making so that it is enough to solidify the resin of UV-curable.Be to improve skin hardness, the side-irradiation of the resin bed that the cured layer of the resin that ionization radiation solidifies and the laminated material of transparent resin layer can be further solidify from ionization radiation.

According to said method, can prepare mist degree and be 5% or littler antiglare layer (antiglare film).Mist degree is represented by JIS K 7136 definition and by (diffusion transmissivity/total transmittance) * 100%.

As explained above, small irregular with the mould on basic uneven plane and with this irregular shape transfer to transparent resin film or during the cured layer of resin that on transparent resin film the ionization radiation of lamination solidify when using to have thereon, the anti-dazzle surface of transparent resin film has small irregular and the plane of injustice substantially.

To be laminated on the surface of above-mentioned linear polarization 20 by the antiglare layer 30 that said method forms, the surface (anti-dazzle surface) that wherein experiences non-glare treated is in the face of outside, be that linear polarization 20 is not faced on anti-dazzle surface, and first retardation plate and/or second retardation plate are laminated on another surface of linear polarization 20.Thus, form the glare-proof polarizing film shown in Fig. 2 and 3 and press material 40.For lamination with upper strata or plate, advantageously use to have the bonding agent such as the acrylic-type adhesive binder of good transparency.

Embodiment

Below, illustrate the present invention by following embodiment, the scope that this embodiment does not limit the present invention in any way.

Embodiment 1

(a) production of mould

With diameter is the circumferential surface mirror polish of the aluminium volume (according to the A5056 of JIS) of 300mm.Then, blasting pressure (gauge pressure at 0.1MPa, (available from FUJI Manufacturing Co., (trade name is available from TOSO CORPORATION for the mirror polish circumferential surface employing zirconium oxide bead of Ltd.) aluminium being rolled up " TZ-SX-17 " for use sand-blast device down together); Granularity: 20 μ m) sandblast is irregular to form from the teeth outwards.The aluminium volume that will have surface imperfection adopts nickel not have electric light pool plating to obtain metal die.Setting the plating condition is the nickel dam of 12 μ m to form thickness.After plating, the thickness that adopts beta rays film thickness instrument (available from " the Fisher Scoper MMS " of Fisher InstrumentsKK) to measure nickel dam is 12.3 μ m.

(b) production of antiglare film and evaluation

(trade name is available from Daippon Ink ﹠amp with photo curable resin combination " GRANDIC 806T "; Chemicals Inc.) is dissolved in ethyl acetate to obtain 50% concentration solution.In solution, add Photoepolymerizationinitiater initiater " LUCILIN TOP " (trade name, available from BASF, chemical name: 2,4,6-trimethylbenzoyl diphenyl phosphine oxide) to obtain coating composition then with the quantity of the per 100 weight portion curable resins of 5 weight portions.It is 5 μ m and in remaining on 60 ℃ exsiccator dry 3 minutes then that coating composition is coated in the coating thickness that makes on the tri acetyl cellulose that thickness is 80 μ m (TAC) film after drying.Adopt after the rubber rollers compaction drying the TAC film and with (a) in the irregular surface of metal die of producing closely contact and make the nickel plating surface of photo curable resin combination aspect mould.In this state, will be 20mW/cm from high-pressure sodium lamp intensity ²Light to transform 200mJ/cm with regard to the light quantity with regard to the h-ray ²Dosage from the side-irradiation of TAC film to solidify photo curable resin combination.Thereafter, the TAC film that will have curing resin layer is removed the transparent antiglare film of being made up of the compound substance of curing resin layer with surface imperfection and TAC film to obtain from mould.

The mist degree of antiglare film uses haze meter " HM-15C " (available from Murakami ColorResearch Laboratory) to be measured as 0.9% according to JIS K 7136.Be to measure, adopt optically clear adhesive to be adhered to glass plate in the sample of antiglare film, wherein irregular surface in the face of outside to prevent warpage.

Use image diaphanometer " ICM-1DP " (, Ltd.) to measure the transmission sharpness according to JIS K 7136 available from Suga Test InstrumentsCo..Be to measure, adopt optically clear adhesive to be adhered to glass plate in the sample of antiglare film, wherein irregular surface in the face of outside to prevent warpage.Adopt rayed sample then, and measure the transmission sharpness from rear surface side (surface that contacts with glass plate).The result is as follows:

The optical frequency com that width is following:	The transmission sharpness
		0.125mm 0.5mm 1.0mm 2.0mm	31.2％ 27.9％ 32.1％ 57.0％
Summation	148.2％

Use the above identical image diaphanometer " ICM-1DP " that uses in the transmission sharpness of measuring to measure the reflection sharpness.Be to measure, adopt optically clear adhesive to be adhered to glass plate in the sample of antiglare film, wherein irregular surface in the face of outside to prevent warpage.For being suppressed at the lip-deep reflection of rear glass, be the exposed surface of the black acrylic type resin plate employing water adhesion of 2mm with thickness to glass plate, antiglare film is adhered on this glass plate.Under this state, measure by side-irradiation light from the sample of antiglare film.The result is as follows:

The optical frequency com that width is following:	The reflection sharpness
		0.125mm 0.5mm 1.0mm 2.0mm	3.2％ * 1.5％ 5.4％ 14.8％
Summation	21.7％

^*Get rid of from the summation of reflection sharpness numerical value

By following mode measurement of reflectivity: adopt from the irregular surface of the collimated beam irradiation antiglare film of He-Ne laser instrument and the variation of measurement of reflectivity the plane that comprises embrane method line and radiation direction from the direction of normal slope 30 degree of film.Use " 3,292 03 Optical PowerSensor " and " 3292 Optical Power Sensor " (both are all available from YokogawaElectric Corporation) measurement of reflectivity.The result is, R (30) is 0.374%, and R (40) is 0.00064%, and R (60)/R (30) is 0.00010.

Use confocal microscope " Plu 2300 " (available from Sensofar Corporation), observe the surface configuration of antiglare film.Be to observe, adopt optically clear adhesive to be adhered to glass plate in the sample of antiglare film, wherein irregular surface in the face of outside to prevent warpage.The magnification of object lens is 50 times.The data and the polygonal average area of Voronoi that obtain according to above-mentioned algorithm process are calculated as 582 μ m ²From three-dimensional coordinate information, the whole surface of confirming antiglare film has small irregular but do not have flat part.

The condition that mould is produced and the optical property and the surface state (the polygonal average area of Voronoi) of antiglare film are summarized in table 1.

The three-dimensional coordinate that obtains in the observation according to above surface configuration calculates the 200 μ m * number of tips of 200 μ m zone protrusions part, the arithmetic mean height Pa of cross-section curve and maximum cross section height Pt and histogrammic peak highly.The results are shown in Table 2.

(c) glare-proof polarizing film is pressed the production of material

Provide as lower polarizing plate and retardation plate.

Polarization plates: (SUMIKARAN SRH 842A (trade name) is available from Sumitomo Chemical Co., Ltd) to have the polyvinyl alcohol (PVA)-iodine molded lines polarizing coating of the diaphragm of being made by tri acetyl cellulose on two surfaces.

The retardation plate of uniaxial tension: R ₀Be 100nm and R _ThMonadic stretching membrane for the cyclic polyolefin resin (ARTON (trade name) is available from JSR Corporation) of 50nm

$(n_x>n_y\&cong;n_z).$

Biaxial stretch-formed retardation plate: R ₀Be 0nm and R _ThBiaxially-stretched film for the cyclic polyolefin resin (ARTON (trade name) is available from JSR Corporation) of 110nm

$(n_x\&cong;n_y>n_z).$

Adopt that bonding agent is bonding to make the former axis of homology and phase retardation axle parallel to each other with upper deflection board (SUMIKARAN SRH 842A) and uniaxial tension retardation plate.On polarization plates, the antiglare film of producing in (b) is bonding, and wherein irregular surface is pressed material in the face of outside to obtain glare-proof polarizing film.Individually, will adopt the bonding polarizing coating compound substance that does not have antiglare layer with acquisition of bonding agent with upper deflection board (SUMIKARAN SRH 842A) and biaxial stretch-formed retardation plate.

(d) production of LCD and evaluation

Carry the display surface and the rear surface dismounting lower polarizing plate of the commercially available monitor of VA pattern crystal display device from being used for PC.Then, replace the initial polarization plates of using, the glare-proof polarizing film that to produce in (c) is pressed material to adopt bonding agent to be adhered to the axis of homology that the display surface side makes that the retardation plate of uniaxial tension presses material in the face of display surface side and glare-proof polarizing film and the polarizing film laminate employing bonding agent that does not contain antiglare layer that the axis of homology direction of initial polarization plates is aimed at and will be produced in (c) and is adhered to the rear surface side and makes biaxial stretch-formed retardation plate face the axis of homology of rear surface side and polarizing film laminate to aim at the initial axis of homology direction of polarization plates.Thus, assembling has the LCD of antiglare layer.

PC is started in the darkroom, and contrast is also calculated in the brightness of using nitometer " BM5A " (available from TOPCON Corporation) to measure the LCD under black show state or white show state subsequently.At this, contrast is by the ratio value representation of the brightness in the brightness in the white show state and the black show state.The result is that the contrast of the LCD of measuring in the darkroom is 909.

, this evaluation system moved to bright chamber thereafter, and the reflection on the display in the black show state of visualization.The result is not observe reflection substantially.This proof LCD has good anti-dazzle performance.The results are shown in Table 3.

Embodiment 2 and 3

Adopt the mode identical to produce metal die, distinguish the thickness that is change nickel coating as shown in table 1 with irregular surface with embodiment 1.Use the metal die of so producing, adopt the mode identical to produce by on its surface, having the transparent antiglare film that irregular curing resin layer and TAC film are formed with embodiment 1.The optical property and the surface state (the polygonal average area of Voronoi) of the antiglare film that obtains are summarized in table 1.For each film, the histogrammic peak of the number of tips of 200 μ m * 200 μ m zone protrusions part, the arithmetic mean height Pa of cross-section curve and maximum cross section height Pt and height adopt with embodiment 1 in those identical modes calculate.The results are shown in Table 2.In addition, use these films to adopt the mode identical to assemble LCD with antiglare layer with embodiment 1, and evaluation contrast and anti-dazzle performance.The results are shown in Table 3.

Comparative Examples 1-5

For comparing, use antiglare film " AG1 ", " AG3 ", " AG5 ", " AG6 " and " AG8 " (being respectively Comparative Examples 1-5), they each as polarization plates " SUMIKARAN " (available from Sumitomo Chemical Co., Ltd) antiglare film also is included in the filler that disperses in the resin of UV-curable, and reports the polygonal optical property of Voronoi and the average area of these antiglare film with the result of embodiment 1,2 and 3 in table 1.Adopt these films, the three-dimensional coordinate that use is measured in calculating the polygonal average area of Voronoi, the histogrammic peak of the 200 μ m * number of tips of 200 μ m zone protrusions part, the arithmetic mean height Pa of cross-section curve and maximum cross section height Pt and height adopt with embodiment 1 in those identical modes calculate.Result with embodiment 1,2 and 3 reports the result in table 2.In addition, use these antiglare film to adopt the mode identical to assemble LCD with antiglare layer with embodiment 1, and evaluation contrast and anti-dazzle performance.Result with embodiment 1,2 and 3 is displayed in Table 3 the result.

Table 1

The optical property and the surface configuration of mould working condition (or title of contrast product) and antiglare film

	The mould working condition		Optical property						Surface configuration
										Blasting pressure (MPa)	Nickel coating thickness (μ m)	Mist degree (%)	Transmission sharpness (%)	Reflection sharpness (%)	Reflection distributes			The polygonal average area of Voronoi (μ m 2)
	R(30) (％)	R(40) (％)	R(60)/ R(30)
				Embodiment 1 embodiment 2 embodiment 3	0.1 0.1 0.1	12.3 11.6 19.3	0.9 2.3 0.4	148.2 126.3 191.6	21.7 17.9 38.2						0.374 0.125 0.726	0.00064 0.00221 0.00013	0.00010 0.00018 0.00004		582 372 533
Comparative Examples 1 Comparative Examples 2 Comparative Examples 3 Comparative Examples 4 Comparative Examples 5	AG1 AG3 AG5 AG6 AG8		3.6 3.4 10.7 20.1 10.9							52.1 97.1 65.9 40.9 199.8	15.7 20.1 23.2 21.7 30.3	0.368 0.568 0.100 0.042 0.099	0.00259 0.00113 0.00409 0.00582 0.00452	0.00018 0.00008 0.00145 0.00639 0.00148				2,084 1,762 546 384 345

Table 2

The surface configuration of antiglare film (continuing)

	The number of tips of 200 μ m * 200 μ m zone protrusions part	Arithmetic mean height Pa (μ m)	Maximum cross section height Pt (μ m)	The peak of height histogram mid point
					Embodiment
1 embodiment 2 embodiment 3	76 119 79	0.089 0.127 0.117	0.493 0.688 0.615	45-50 45-50 50-55
					Comparative Examples 1 Comparative Examples 2 Comparative Examples 3 Comparative Examples 4 Comparative Examples 5	18 22 78 114 139	0.184 0.220 0.190 0.284 0.157	0.933 1.088 1.107 1.615 0.865	25-30 20-25 20-25 20-25 20-25

Table 3

The evaluation of LCD

	Contrast	Anti-dazzle performance 1)
			Embodiment 1 embodiment 2 embodiment 3	909 898 927	A A A
Comparative Examples 1 Comparative Examples 2 Comparative Examples 3 Comparative Examples 4 Comparative Examples 5	896 890 877 844 885	B B A A A

Remarks: 1) anti-dazzle performance

A: have enough anti-dazzle performances

B: have not enough anti-dazzle performance (high reflection)

From the result shown in table 1 and 3 as seen, embodiment 1,2 and 3 sample satisfy according to mist degree of the present invention, reflection and distribute and the definition of surface configuration, show excellent anti-dazzle performance (not reflection), and obtain high-contrast and good observability.In addition, they cause that less dazzle and loss bleach.

Because R (30) is less than 2%, R (40) less than 0.003% and R (60)/R (30) less than 0.001, bleaching does not appear in Comparative Examples 1 and 2 sample.Yet the polygonal average area of the Voronoi of these samples surpasses 1500 μ m ², they cause dazzle.When using the glare-proof polarizing film of producing from the antiglare film of Comparative Examples to press the material assembling liquid crystal display, the contrast in the Comparative Examples 1 and 2 is very high and be respectively 896 and 890, but anti-dazzle performance be not satisfied and observability low, as shown in table 3.For the sample of Comparative Examples 3,4 and 5, R (40) surpass 0.003% and R (60)/R (30) surpass 0.001.Therefore, their beguines bleach more according to sample of the present invention.In Comparative Examples 3,4 and 5, mist degree higher and therefore contrast tend to reduce.

Claims (11)

1. a LCD comprises liquid crystal cell, and this liquid crystal cell comprises a pair of box base material and be clipped in liquid crystal layer between the box base material, and wherein liquid crystal molecule is being orientated not existing to apply under the voltage near the base material in being basically perpendicular to the direction of base material; Be placed on a pair of linear polarization on the outside surface of box base material separately, between them, sandwich liquid crystal cell; Be placed on a box base material and first retardation plate between the linear polarization separately, the refractive index of this first retardation plate satisfies following relation: n _x＞n _y〉=n _z, n wherein _xAnd n _yBe principal refractive index and the n in the membrane plane _zBe the refractive index in the thickness direction of film, and it is basic parallel with the axis of homology of adjacent linear polarizer or meet at right angles substantially with it to be placed the phase retardation axle that makes the retardation plate of winning; Be placed between first retardation plate and the box base material or be placed on another box base material and in the face of second retardation plate between its linear polarization, the refractive index of this second retardation plate satisfies following relation: $n_x\&cong;n_y>n_z,$ N wherein _x, n _yAnd n _zIdentical with above definition; With the lip-deep antiglare layer that is placed on arbitrary linear polarization, this polarizer surperficial relative with in the face of liquid crystal cell, wherein antiglare layer is 5% or littler against the mist degree of vertical incidence light, when under the incident angle of 45 degree light, using three optical frequency coms forming by concealed wire and bright line to measure the reflection sharpness, total reflection sharpness is 50% or littler, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (30) under the reflection angle of 30 degree is 2% or littler, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (40) under the reflection angle of 40 degree is 0.003% or littler, and R (〉=60) is 0.001 or littler with the ratio of R (30), wherein R (〉=60) is the incident light that enters against under the incident angle of 30 degree, reflectivity under 60 degree or bigger reflection angle in any direction, and the surface of antiglare layer is 50 μ m by average area ²-1500 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.

2. according to the LCD of claim 1, wherein second retardation plate is placed on the box base material relative with first retardation plate and faces between the linear polarization of this box base material.

3. according to the LCD of claim 1, wherein second retardation plate is placed between first retardation plate and the box base material.

4. according to the LCD of claim 1, wherein the polygonal average area of antiglare layer is 300 μ m ²-1000 μ m ², wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.

5. a glare-proof polarizing film is pressed material, comprise the antiglare layer that adopts this order lamination, linear polarization and retardation plate, wherein antiglare layer is 5% or littler against the mist degree of vertical incidence light, when under the incident angle of 45 degree light, using three optical frequency coms forming by concealed wire and bright line to measure the reflection sharpness, total reflection sharpness is 50% or littler, each width of this optical frequency com is respectively 0.5mm, 1.0mm and 2.0mm, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (30) under the reflection angle of 30 degree is 2% or littler, against the incident light that under the incident angle of 30 degree, enters, reflectivity R (40) under the reflection angle of 40 degree is 0.003% or littler, and R (〉=60) is 0.001 or littler with the ratio of R (30), wherein R (〉=60) is the incident light that enters against under the incident angle of 30 degree, reflectivity under 60 degree or bigger reflection angle in any direction, and the surface of antiglare layer is 50 μ m by average area ²-1500 μ m ²Polygon form, wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface; With

Retardation plate comprises and is selected from least one following retardation plate: refractive index satisfies relation: n _x＞n _y〉=n _zFirst retardation plate,

Satisfy relation with refractive index: $n_x\&cong;n_y>n_z$ Second retardation plate

N wherein _xAnd n _yBe principal refractive index and the n in the membrane plane _zBe the refractive index in the thickness direction of film,

Condition is when using first retardation plate, places this and first postpones to make the phase retardation axle of the retardation plate of winning basic parallel with the axis of homology of linear polarization or meet at right angles substantially with it.

6. press material according to the glare-proof polarizing film of claim 5, wherein retardation plate is by having relation: n _x＞n _y〉=n _zSingle first retardation plate form, and place this retardation plate and make that its phase retardation axle is basic parallel with the axis of homology of linear polarization or meet at right angles substantially with it.

7. press material according to the glare-proof polarizing film of claim 5, wherein retardation plate is by having relation: $n_x\&cong;n_y>n_z$ Single second retardation plate form.

8. press material according to the glare-proof polarizing film of claim 5, wherein retardation plate is by having relation: n _x＞n _y〉=n _zSingle first retardation plate and have a relation: $n_x\&cong;n_y>n_z$ Single second retardation plate form, and it is basic parallel with the axis of homology of linear polarization or meet at right angles substantially with it to place the phase retardation axle that makes the retardation plate of winning.

9. press material according to the glare-proof polarizing film of claim 5, wherein the polygonal average area of glare-proof polarizing film pressure material is 300 μ m ²-1000 μ m ², wherein polygon uses the tip of the bossing of surface imperfection to form as generatrix by the Voronoi graduation on surface.

10. press material according to the glare-proof polarizing film of claim 5, wherein this antiglare layer is formed by have small irregular resin molding on its surface, formed by following mode: the impact by fine particle forms irregular on the sheet metal of polishing, electroless nickel plating is to form mould on the irregular surface of sheet metal, the surface imperfection of transfer mold is removed resin molding to the surface of transparent resin film with from mould.

11. the glare-proof polarizing film according to claim 5 is pressed material, wherein said transparent resin film comprises the resin or the thermoplastic resin of UV-curable.

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