CN101675362B

CN101675362B - Anti-dazzling film, anti-dazzling polarizing plate, and image display device

Info

Publication number: CN101675362B
Application number: CN200880014610XA
Authority: CN
Inventors: 古谷勉; 赵成祐; 孙刚勇
Original assignee: Sumitomo Chemical Co Ltd
Current assignee: Sumitomo Chemical Co Ltd
Priority date: 2007-05-08
Filing date: 2008-04-30
Publication date: 2011-06-22
Anticipated expiration: 2028-04-30
Also published as: TW200907398A; KR20100016539A; WO2008136535A1; JP5135871B2; KR101438859B1; TWI445995B; CN101675362A; JP2008281596A

Abstract

This invention provides an anti-dazzling film comprising a transparent support and an anti-dazzling layer having a fine concavoconvex surface provided on the transparent support. The anti-dazzling film satisfies the requirements that the relative scattering light intensity T (20) defined as a relative scattering light intensity when the relative scattering intensity in an anti-dazzling layer side normal direction (12) upon the incidence of light through the transparent support side at an angle of incidence (f) (20 DEG ) is T (f), is 0.0001 to 0.0005%, and the relative scattering light intensity T (30) defined as a relative scattering light intensity for 30 DEG incidence is 0.00004 to 0.00025%.

Description

Anti-dazzle film, anti-dazzling polarizing plate and image display device

Technical field

The present invention relates to a kind of image display device that shows anti-dazzle (antiglare) film that outstanding anti-dazzle performance and turbidity are low and possess this anti-dazzle film.

The present invention relates to show outstanding anti-dazzle performance and can not fade turn white, non-dazzing and manifest high contrast, anti-dazzle (antiglare) film, the anti-dazzling polarizing plate that possesses this anti-dazzle film and the image display device of good identification are provided when being applicable to image display device.

Background technology

LCD or plasma display device, Braun tube (cathode-ray tube (CRT): CRT) display, organic electroluminescent (EL) if image display devices such as display light outside its display surface is mirrored, then identification is significantly impaired.In order to prevent mirroring of so outer light, past at the video camera or the digital camera of the televisor of paying attention to image quality or PC, the strong open air use of light intensity outside, utilize in the mobile phone that reflected light shows etc., the surface of image display device be provided with prevent outside the thin layer of mirroring of light.This thin layer can roughly be divided into: comprise the interference that utilizes optical multilayer enforcement the thin layer of the film handled of no reflection events, with, implemented by form the fine concavo-convex thin layer that the incident light scattering is made mirror the film of the non-glare treated that picture scumbles on the surface thereby comprise.Wherein, the essential multilayer film that forms the blooming of homogeneous of the former no reflection events film is so cost uprises.Relative therewith, the latter's anti-dazzle film can be than the qurer manufacturing, so be widely used in large-scale PC or the display purposes such as (monitor).

Thereby such anti-dazzle film is for example to utilize by disperseed the resin solution of filling agent in coating on the substrate sheets and adjusted coating film thickness filling agent to be exposed form the concavo-convex method etc. of (random) arbitrarily to be made on the coated film surface on sheet material all the time.But, passing through like this makes anti-dazzle film that filling agent disperses to make because controls such as disperse state that concavo-convex configuration or shape are subjected to the filling agent in the resin solution or coating states, so what be difficult to obtain to want to obtain is concavo-convex, if turbidity is low, then can not obtain sufficient anti-dazzle performance.And then, when such anti-dazzle film in the past being disposed at image display device surperficial,, scattered light makes display surface integral body become to turn white that becoming so-called the fading that shows unsharp color turns white thereby taking place sometimes.

In addition, along with the height of nearest image display device becomes more meticulous, the concave-convex surface shape of the pixel of image display device and anti-dazzle film interferes with each other, thereby the result produces the so-called twinkling phenomenon that briliancy distributes and becomes and be difficult to observe easily.Twinkling in order to eliminate, also attempted at adhesive resin and disperseed between the filling agent refringence to be set making light scattering, but such anti-dazzle film is being applicable under the situation of image display device, briliancy when scattered light causes black the demonstration improves, thereby contrast reduction identification reduces significantly as a result.

On the other hand, also attempted not containing filling agent and only utilize on the surface of transparent resin layer, form fine concavo-convex to manifest anti-dazzle property.For example, open the anti-dazzle film that discloses form as described below in the 2002-189106 communique (patent documentation 1) the spy, be: solidify by under the state of clamping ionising radiation curable resin between embossing casting mold and the transparent resin film, making this ionising radiation curable resin, form mean distance between the adjacent protuberance on three-dimensional 10 mean roughness and the three-dimensional roughness reference field and satisfy the fine concavo-convex of setting respectively, will be formed with the anti-dazzle film that this concavo-convex ionising radiation curable resin layer is arranged at the form on the described transparent resin film.In the document, put down in writing preferably to use the roller of chromium plating on the surface of iron and utilize sand-blast or penetrate pearl (beads shot) method and formed the concavo-convex die face that embossing is used.And then, be preferably in addition in this wise on the die face that forms with the permanance that improves when using and implement to use after the chromium plating etc. as purpose, can realize the record of dura materization and etch-proof purpose thus.

In the facture of such knurling rolls owing in the high chromium plating of hardness, carry out sandblast (blast) or spray (shot), so be difficult to form concavo-convex, and the concavo-convex shape that is difficult to critically control formation.In addition, also such as the spy open in the 2004-29672 communique (patent documentation 2) record, material and the shape most surperficial roughening thereof of chromium plating because of becoming substrate, owing on utilizing concavo-convex that sandblast forms, be formed on the thin crack that generates in the chromium plating, be difficult to be designed to concavo-convex problem arbitrarily so exist.And then, owing to exist in the thin crack that produces in the chromium plating, so that the scattering properties of the anti-dazzle film that finally obtains sometimes also can become is undesirable.

As other the document that discloses the manufacture method that has the roller that uses in the making of concavo-convex film on the surface, for example the spy opens 2004-29240 communique (patent documentation 3) or the spy opens 2004-90187 communique (patent documentation 4).The method that the pearl legal system is made knurling rolls of penetrating of utilizing is disclosed in the former document.In the latter's document, disclose experience forms the coat of metal on the surface of knurling rolls operation, to the surface of the coat of metal carry out the operation of mirror ultrafinish, in the metal-plated aspect of carrying out mirror ultrafinish is implemented the operation of blasting treatment with ceramic bead (ceramic beads) and then the operation of carrying out shot peening strengthening (peening) processing implemented is as required made knurling rolls method.

Implementing under the state of blasting treatment on the surface of knurling rolls in this wise, the distribution of the concavo-convex diameter that the size distribution of generation sandblast particle causes, be difficult to control the degree of depth of utilizing the depression that sandblast obtains simultaneously, thus repeatability obtain well the outstanding concavo-convex shape of anti-dazzle function aspect existing problems.

In addition, the applicant application be the spy open 2006-53371 communique (patent documentation 5) thus in disclose and formed concavo-convex at polished metallic surface collision particulate, implement electroless plating nickel therein and become mould, the male and fomale(M﹠F) of this mould is transferred to transparent resin film, becomes low turbidity and the outstanding anti-dazzle film of anti-dazzle performance thus.

And then the document that sees through scattered light intensity as having stipulated anti-dazzle film comprises that the spy opens 2003-248101 communique (patent documentation 6) or the spy opens 2004-126495 communique (patent documentation 7).Disclose a kind of anti-dazzle property antireflective film in the former document, it is the film that has antiglare hardcoat on transparent supporting body, wherein, from transparent support side incident light, the light quantity (I of scattering on the direction of 5 ° of the light medium dips that sees through ₅) the relative light quantity (I of rectilinear propagation ₀) ratio (I ₅/ I ₀) be more than 3.5%, the light quantity (I of scattering on the direction of 20 ° of inclinations ₂₀) relative I ₀Ratio (I ₂₀/ I ₀) be below 0.1%.Disclose a kind of anti-dazzle property film in the latter's document, wherein, the scattering angle that demonstrates the maximum value of scattered light intensity is 0.1～10 °, and total light transmittance is 70～100%.Even utilize disclosed anti-dazzle film in these documents, especially when being applicable to high meticulous image display device, also be difficult to keep high-contrast.

Summary of the invention

Problem of the present invention is to provide and shows outstanding anti-dazzle performance and the reduction of the identification that causes, non-dazzing and manifest the anti-dazzle film of high contrast when being disposed at high meticulous image display device surperficial of turning white that prevents to fade, and then anti-dazzling polarizing plate and the image display device that is suitable for this anti-dazzle film is provided.

The inventor etc. concentrate on studies in order to solve above-mentioned problem, found that on transparent supporting body and to form in the anti-dazzle film that antiglare layer with fine convex-concave surface forms, as long as make relative scattered light intensity T (20) on the antiglare layer side normal direction of transparent support side during show specific value and make the relative scattered light intensity T (30) on the antiglare layer side normal direction of transparent support side during show specific value with 30 ° of incident lights with 20 ° of incident lights of incident angle, then on the basis that prevents from fully to dazzle, when being applicable to image display device, the contrast that becomes can reduce hardly.And then, in this anti-dazzle film, from the antiglare layer side during with 30 ° of incident lights of incident angle, as long as make the reflectivity R (50) of 50 ° of the reflectivity R (40) of 40 ° of reflectivity R (30), reflection angle of 30 ° of reflection angle and reflection angle show specific value respectively, then show outstanding anti-dazzle property and simultaneously can prevent from effectively to fade more effective aspect turning white.The present invention just is being based on this opinion and is further carrying out various discussions and finish.

Promptly, anti-dazzle film of the present invention forms the antiglare layer with fine convex-concave surface and forms on transparent supporting body, relative scattered light intensity T (20) on the antiglare layer side normal direction of transparent support side during with 20 ° of incident lights of incident angle is more than 0.0001%, below 0.0005%, and the relative scattered light intensity T (30) on the antiglare layer side normal direction of transparent support side during with 30 ° of incident lights of incident angle is more than 0.00004%, below 0.00025%.

In this anti-dazzle film, preferably from the antiglare layer side during with 30 ° of incident lights of incident angle, the reflectivity R (30) that reflection angle is 30 ° is more than 0.05%, below 2%, the reflectivity R (40) that reflection angle is 40 ° is more than 0.0001%, below 0.005%, and the reflectivity R (50) that reflection angle is 50 ° is more than 0.00001%, below 0.0005%.

In addition, also preferably make with this anti-dazzle film vertically the surface haze during incident light be more than 0.1%, below 5%, making total turbidity is more than 5%, below 25%.

This anti-dazzle film can make the width that utilizes dark portion and bright portion for 3 kinds of optical combs of 0.5mm, 1.0mm and 2.0mm, with the reflection visibility of 45 ° of mensuration of incident angle of light and be below 40%.

And then, the also preferred arithmetic mean height Pa in the cross section curve of the convex-concave surface that constitutes antiglare layer of this anti-dazzle film is more than the 0.05 μ m, below the 0.2 μ m, maximum cross-section height Pt is more than the 0.2 μ m, below the 1 μ m, and average length PSm is more than the 15 μ m, below the 30 μ m.

The convex-concave surface of formation antiglare layer preferably has the protuberance more than 50, below 100 in the zone of 200 μ m * 200 μ m.In addition, be that the polygonal average area that generatrix carries out forming when VShi is cut apart to its surface is 100 μ m with the protuberance summit preferably also ²More than, 1,000 μ m ²Below.

Antiglare layer in this anti-dazzle film preferably forms concave-convex surface by carrying out transfer printing from the mould with male and fomale(M﹠F).And, also preferred adhesive resin 100 weight portions relatively, this antiglare layer contain that 10～100 weight portion mean grain sizes are that 5 μ m are above, 15 μ m following and with the refringence of adhesive resin be particulate more than 0.01, below 0.06, and then, also preferred this particulate buries in antiglare layer fully, thereby particulate can not influence the concaveconvex shape on surface.

In this anti-dazzle film, can form low-reflection film at the convex-concave surface of antiglare layer.

Anti-dazzle film of the present invention can synthesize anti-dazzling polarizing plate with the polarizer group that comprises polyvinyl alcohol resin.Particularly, this anti-dazzling polarizing plate is the structure on the transparent support side of the described anti-dazzle film of fitting at polaroid.

In addition, anti-dazzle film of the present invention or anti-dazzling polarizing plate can be combined into image display device with image-displaying members such as liquid crystal display cells or plasma display devices.Therefore, image display device of the present invention possesses described anti-dazzle film or anti-dazzling polarizing plate and image indication mechanism, and this anti-dazzle film or anti-dazzling polarizing plate are configured in the identification side of image-displaying member.

Description of drawings

Fig. 1 is shown schematically in to try to achieve incident direction when the scattered light intensity of antiglare layer side normal direction observation, light from the transparent support side incident light of anti-dazzle film and see through scattered light intensity and measure the stereographic map of direction.

Fig. 2 will change relative scattered light intensity (logarithmic scale) that incident angle a measures example of the curve map drawn of incident angle relatively.

Fig. 3 be shown schematically in when asking reflectivity from the incident direction of the light of antiglare layer side and the stereographic map of reflection direction.

Fig. 4 be with relatively from the normal of anti-dazzle film with the reflection of light reflection of light angle of 30 ° angle incident and an example of the curve map of reflectivity (reflectivity is a logarithmic scale) drafting.

Fig. 5 is the stereographic map that schematically shows the algorithm that the protuberance of anti-dazzle film judges.

Fig. 6 is the VShi figure of the example cut apart of expression VShi (Voronoi).

Fig. 7 is the cross section mode chart of the manufacture method of the mould that expression is used to make anti-dazzle film of the present invention in each operation.

Fig. 8 is illustrated in the chromium plating cross section mode chart of the state of lapped face afterwards.

Fig. 9 is the twinkling planimetric map of estimating with the cell cube of pattern of expression.

Figure 10 is the cross section mode chart of the twinkling state of estimating of expression.

Figure 11 is the curve map that sees through scattering curve that is illustrated in the anti-dazzle film that obtains among the embodiment 1～4.

Figure 12 is the curve map that is illustrated in the reflectivity curve of the anti-dazzle film that obtains among the embodiment 1～4.

Figure 13 is the curve map that sees through scattering curve that is illustrated in the anti-dazzle film that obtains in comparative example 1 and 2.

Figure 14 is the curve map that is illustrated in the reflectivity curve of the anti-dazzle film that obtains in comparative example 1 and 2.

Figure 15 is the curve map that sees through scattering curve that is illustrated in the anti-dazzle film that obtains in the comparative example 3～5.

Figure 16 is the curve map that is illustrated in the reflectivity curve of the anti-dazzle film that obtains in the comparative example 3～5.

Figure 17 is the curve map that sees through scattering curve that is illustrated in the anti-dazzle film that obtains in the comparative example 6～9.

Figure 18 is the curve map that is illustrated in the reflectivity curve of the anti-dazzle film that obtains in the comparative example 6～9.

Among the figure, the 11-anti-dazzle film, the 12-film normal, 13-measures the incident ray direction when seeing through scattered light intensity, 14-sees through the mensuration direction (normal direction) of scattered light intensity, incident ray direction when 15-measures reflectivity, 16-normal reflection direction, 17-is reflection direction arbitrarily, 19-contains the face of incident ray direction and film normal, incident angle when φ-mensuration sees through scattered light intensity, reflection angle during θ-mensuration reflectivity, point arbitrarily on the 21-anti-dazzle film, 22-anti-dazzle film surface, 23-film reference field, 24-is the projection circle on the film reference field of the circle at center with the arbitrfary point on the anti-dazzle film, the subpoint on 26-protuberance summit (generatrix that VShi is cut apart), the 27-VShi polygon, 28-do not calculate that (count) become mean value with measure the tangent VShi polygon in border, the visual field, the 31-metal base, 32-copper facing or nickel dam, the 33-abrasive surface, the concave surface that 34-collision particulate forms, 35-copper plate, 36a-utilizes etching to make the face of the male and fomale(M﹠F) rust of collision particulate formation, 36b-utilizes copper facing to make the face of the male and fomale(M﹠F) rust that the collision particulate forms, 37-chromium coating, residual male and fomale(M﹠F) after the 38-chromium plating, the tabular surface that takes place during 39-surperficial after grinding chromium plating, the cell cube of 40-photomask.The chromium light-shielding pattern of 41-photomask, the peristome of 42-photomask, 43-photomask, 45-light box (lightbox), 46-light source, 47-glass plate, the observation place that 49-dazzles.

Embodiment

Below preferred implementation of the present invention is elaborated.Anti-dazzle film of the present invention is to form the anti-dazzle film that antiglare layer with fine convex-concave surface forms on transparent supporting body, wherein, show value 0.0001% or more, below 0.0005% at the relative scattered light intensity T (20) that observes in antiglare layer side normal direction during with 20 ° of incident lights of incident angle from the transparent support side, in the value of relative scattered light intensity T (30) demonstration more than 0.00004%, below 0.00025% of observing in antiglare layer side normal direction during with 30 ° of incident lights of incident angle from the transparent support side.

In addition, turn white in order to show outstanding anti-dazzle performance and to suppress to fade effectively simultaneously, preferably from the antiglare layer side during with 30 ° of incident lights of incident angle, the reflectivity R (30) that reflection angle is 30 ° is more than 0.05%, below 2%, the reflectivity R (40) that reflection angle is 40 ° is more than 0.0001%, below 0.005%, and the reflectivity R (50) that reflection angle is 50 ° is more than 0.00001%, below 0.0005%.

[scattered light intensity relatively]

At first, relative scattered light intensity T (20) and T (30) on the antiglare layer side normal direction of transparent support side during during with 20 ° of incident lights of incident angle and with 30 ° of incident lights of incident angle are described.

Fig. 1 be shown schematically in (with the opposition side of male and fomale(M﹠F)) incident light from the transparent support side and incident direction when being determined at scattered light intensity on antiglare layer side (male and fomale(M﹠F) side) normal direction, light with see through scattered light intensity and measure the stereographic map of direction.With reference to this figure, relatively on the transparent support side of anti-dazzle film 11 from the light 13 of normal 12 with certain angle φ (becoming incident angle) incident, be determined at the intensity of the scattered light 14 that the normal direction 12 of antiglare layer side sees through, will remove this value that sees through scattered light intensity as scattered light intensity T (φ) relatively with the light intensity of light source.Promptly, from the transparent support side of anti-dazzle film 11 during from the angle incident incident light 13 of 20 ° of off-normal, the value of removing the intensity of the emergent light of observing in antiglare layer side normal direction 12 14 with the light intensity of light source is T (20), from normal 12 during with 30 ° angle incident incident light 13, the value of removing in the intensity of the emergent light 14 of antiglare layer side normal direction 12 observations with the light intensity of light source is T (30) in the transparent supporting body lateral deviation of anti-dazzle film 11.

Relative scattered light intensity T (20) when 20 ° of incident is higher than under 0.0005% the situation, and when this anti-dazzle film was applicable to image display device, the briliancy of utilizing scattered light to deceive when showing rose, thereby contrast is descended, so not preferred.In addition, the relative scattered light intensity T (20) when 20 ° of incident is lower than under 0.0001% the situation, and dispersion effect is low, when being applicable to high meticulous image display device, takes place to dazzle, so still not preferred.Equally, relative scattered light intensity T (30) when 30 ° of incident is higher than under 0.00025% the situation, and when this anti-dazzle film was applicable to image display device, the briliancy of utilizing scattered light to deceive when showing rose, thereby contrast is descended, so also not preferred.In addition, the relative scattered light intensity T (30) when 30 ° of incident is lower than under 0.00004% the situation, and dispersion effect is low, when being applicable to high meticulous image display device, takes place to dazzle, so still not preferred.Especially when anti-dazzle film is applicable to the LCD that is not emissive type, because leaking the scattering that causes, the light during black the demonstration cause the effect of briliancy rising big, so if relative scattered light intensity T (20) and T (30) are higher than regulation of the present invention, contrast is reduced significantly, thereby become the result who destroys identification.

As mentioning the document that sees through scattered light intensity at present, for example comprise described patent documentation 6 (spy opens the 2003-248101 communique) or patent documentation 7 (spy opens the 2004-126495 communique) etc., and in these documents, different with the scattering properties of the present invention's regulation, when being applicable to image display device, not necessarily being enough to realize high contrast, suppressing to dazzle.

Fig. 2 is the relative scattered light intensity of measuring from the incident angle φ on transparent support side (logarithmic scale) example of the curve map drawn of incident angle φ relatively that will change anti-dazzle film 11 among Fig. 1.Sometimes will represent the curve map of such incident angle and the relation of relative scattered light intensity or be called through scattering curve from the relative scattered light intensity of its each incident angle that reads.Shown in this curve map, relatively scattered light intensity shows the peak for 0 ° in incident angle, exists the angle of incident angle 13 off-normal directions big more, the trend that reduces more of scattered light intensity then.In addition, just (+) of incident angle and negative (-) are be the center with normal direction (0 °), and be definite by the degree of tilt of the incident light in the face 19 that contains incident direction of light 13 and normal 12.Thereby seeing through scattering curve is to be the general rule of center, left and right symmetrically appearance with 0 ° of incident angle.Shown in Figure 2 seeing through in the example of scattering curve, relative scattered light intensity T (0) during 0 ° of incident about 30% shows the peak, relative scattered light intensity T (30) when the relative scattered light intensity T (20) during 20 ° of incidents is about 0.0002%, 30 ° of incident is about 0.00004%.

When measuring the relative scattered light intensity of anti-dazzle film, must critically measure the relative scattered light intensity below 0.001% well.Therefore, it is effective using the wide detecting device of dynamic range (dynamic range).As such detecting device, for example can use commercially available light power meter (powermeter) etc., aperture (aperture) can be set before the detecting device of this light power meter, use goniophotometer to measure anti-dazzle film, and make the expectation angle become 2 °.

Incident light can use the luminous ray of 380～780nm, uses light source as measuring, and can use the light that will collimate and form from the light that Halogen lamp LED light sources such as (halogen lamp) penetrates, and also can use monochromatic source and the high light sources of the depth of parallelism such as laser.In addition,, preferably use transparent adhesives on the optics, it is fitted in glass substrate and makes male and fomale(M﹠F) become the surface, measure afterwards in order to prevent the film warpage.

[reflectivity during 30 ° of incidents]

Then, the reflectivity from each angle of antiglare layer side during with 30 ° of incident lights of incident angle is described.Fig. 3 be shown schematically in relative anti-dazzle film when asking reflectivity from the incident direction of the light of antiglare layer side and the stereographic map of reflection direction.With reference to this figure, relatively in the antiglare layer lateral deviation of anti-dazzle film 11 from the incident light 15 of normal 12 with 30 ° angle incident, the catoptrical reflectivity (being the normal reflection rate) that will be normal reflection direction 16 to the direction of 30 ° of reflection angle is as R (30).In addition, represent that with symbol 17 with the reflected light of reflection angle θ arbitrarily, the

catoptrical direction

16,17 when measuring reflectivity is positioned at the face 19 that contains incident direction of light 15 and normal 12.Then, will be made as to the reflectivity of the direction of 40 ° of reflection angle R (40), be made as R (50) to the reflectivity of the direction of 50 ° of reflection angle.

In anti-dazzle film of the present invention, the incident light that preferred incident angle relatively is 30 °, the reflectivity of the direction that reflection angle is 30 ° is that normal reflection rate R (30) is more than 0.05%, below 2%.In addition, the reflectivity R (40) of the direction that also preferred reflection angle is 40 ° is more than 0.0001%, below 0.005%, and the reflectivity R (50) that reflection angle is 50 ° is more than 0.00001%, below 0.0005%.

If normal reflection rate R (30) surpasses 2%, then can not obtain sufficient anti-dazzle function, identification reduces.On the other hand, if normal reflection rate R (30) is too small, then show the trend of fading and turning white, so be preferably more than 0.05%.Normal reflection rate R (30) more preferably below 1.5%, especially is preferably below 0.7%.In addition, if R (40) be higher than 0.005% or R (50) be higher than 0.0005%, then anti-dazzle film can fade and turn white, thereby identification is reduced.That is, for example, show under the black situation at display surface even be provided with in the foremost of display device under the state of anti-dazzle film, thus also exist pick up from around light the trend of fading and turning white that display surface integral body bleaches takes place.Therefore, preferably do not make R (40) and R (50) become too big.On the other hand, if the reflectivity in these angles is too small, also can not show sufficient anti-dazzle property, so R (40) is preferably more than 0.0001% usually, R (50) is preferably more than 0.00001% usually.R (50) is more preferably below 0.0001%.

Fig. 4 be with relatively in the antiglare layer lateral deviation of the anti-dazzle film 11 of Fig. 3 from the example of normal 12 with reflection angle with the curve map of reflectivity (reflectivity is a logarithmic scale) drafting of the reflected light 17 of the incident light 15 of 30 ° angle incident.Sometimes will represent such reflection angle and reflectivity relation curve map or be called reflectivity curve from the reflectivity of its each reflection angle that reads.Shown in this curve map, normal reflection rate R (30) is relatively at the peak of the reflectivity of the reflected light 15 of 30 ° of incidents, has big more, the trend that reduces more of reflectivity then of the angle that departs from the normal reflection direction.In the example of reflectivity curve shown in Figure 4, normal reflection rate R (30) is about 0.2%, and R (40) is about 0.0004%, and R (50) is about 0.00005%.

Investigation according to inventor etc., the major part of the anti-dazzle film that goes on the market in market at present is the type that filling agent is disperseed, if such anti-dazzle film, the relative scattered light intensity T (20) when then not having 20 ° of incidents is about more than 0.0001% below 0.0005%, the relative scattered light intensity T (30) during 30 ° of incidents is about the situation below 0.00025% more than 0.00004%.In addition, see through the scattering properties except such, do not have also that normal reflection rate R (30) is more than 0.05% below 2%, the reflectivity R (40) of 40 ° of reflection angle is more than 0.0001% below 0.005%, the reflectivity R (50) of 50 ° of reflection angle is the anti-dazzle film below 0.0005% more than 0.00001%.As a result, do not dazzle, show high-contrast, show sufficient anti-dazzle performance and the anti-dazzle film that does not fade and turn white simultaneously.Relative therewith, the anti-dazzle film of the present invention's regulation is the outstanding anti-dazzle film that shows that sufficient anti-dazzle performance and inhibition are faded and turned white as can be known.

When measuring the reflectivity of anti-dazzle film, must with relative scattered light intensity similarly precision measure reflectivity below 0.001% well.Therefore, it is effective using the detecting device of wide dynamic range.As such detecting device, for example can use commercially available light power meter etc., aperture can be set before the detecting device of this light power meter, use goniophotometer to measure anti-dazzle film, and make the expectation angle become 2 °.As incident light, can use the luminous ray of 380～780nm, use light source as measuring, can use the light that will collimate and form from the light that light sources such as Halogen lamp LED penetrate, also can use monochromatic source and the high light sources of the depth of parallelism such as laser instrument.Under the situation that is the level and smooth and transparent anti-dazzle film in the back side, because sometimes from the reflections affect measured value at the anti-dazzle film back side, so preference is as by using bonding agent or liquid such as water or glycerine to make the even surface optics of anti-dazzle film adhere to the acrylic resin board of black, thereby can only measure the reflectivity of anti-dazzle film outmost surface.

[turbidity]

In addition, anti-dazzle film of the present invention turn white in order to prevent to fade and when suppressing to be applicable to high meticulous image display device effectively dazzle and the preferred surface haze of vertical incidence light relatively is 0.1% or more, below 5%, always turbidity is more than 5%, below 25%.Total turbidity of anti-dazzle film can be measured based on the method shown in the JIS K 7136.The differentiation of surface haze and inner turbidity is, as long as after measuring whole turbidity, attaches turbidity with glycerine on its convex-concave surface and is roughly 0 transparent membrane and measures inner turbidity, utilizes following formula to try to achieve surface haze and gets final product.

The turbidity of surface haze=integral body-inner turbidity

Be roughly the turbidity value of measuring under the state of 0 transparent membrane at attaching turbidity on the convex-concave surface of anti-dazzle film and roughly eliminated, and think and in fact represent inner turbidity owing to the original concavo-convex surface haze that causes.Be roughly 0 transparent membrane as turbidity,, for example can use triacetylcellulose film etc. as long as, be not particularly limited for the little transparent membrane of turbidity.

Be higher than in surface haze under 5% the situation, the trend height that fades and turn white being lower than under 0.1% the situation, does not show sufficient anti-dazzle property, so not preferred.In addition, preferred total turbidity is more than 5% in order to eliminate twinkling effectively.But if total turbidity is higher than 25%, then when being applicable to image display device, so picture deepening and identification is impaired is not preferred.

[reflection visibility]

Anti-dazzle film of the present invention also preferably uses the 3 kind optical combs of the width of dark portion and bright portion as 0.5mm, 1.0mm and 2.0mm, with the reflection visibility of 45 ° of mensuration of incident angle of light and be below 40%.The method that the utilization of reflection visibility is stipulated in JIS K 7105 is measured.In this specification, as the optical comb that uses in the mensuration as visibility, the ratio of having stipulated dark portion and the width of bright portion is that 1: 1 and its width are 0.125mm, 0.5mm, 1.0mm and 2.0mm 4 kinds.Wherein, under the situation of using width as the optical comb of 0.125mm, in the present invention in Gui Ding the anti-dazzle film, because it is big that the error of its measured value becomes, so width is the measured value of situation of the optical comb of 0.125mm be not added to and in, and will use width as 3 kinds of optical combs mensuration of 0.5mm, 1.0mm and 2.0mm as visibility and be called the reflection visibility.The maximal value of the reflection visibility when utilizing this definition is 300%.If utilize the reflection visibility of this definition to surpass 40%, then the picture of light source etc. is mirrored brightly, and anti-dazzle property is poor, so not preferred.

Wherein, if the reflection visibility is below 40%, if then only from the angle of reflection visibility, then becoming is difficult to the quality of more anti-dazzle property.This be because, the reflection visibility of utilizing above-mentioned definition is under 40% the situation, use width to be at most about 10%, can not ignore the deviation of the reflection visibility that error at measurment etc. causes thereby become as the visibility that respectively reflects of the optical comb of 0.5mm, 1.0mm and 2.0mm.

Therefore, in the present invention, for the reflection visibility is anti-dazzle film below 40%, by stipulating relative scattered light intensity, reflectivity combination when preferably passing through with it and with 30 ° of incidents, and become the index that can estimate the anti-dazzle performance of anti-dazzle film well.

[surface configuration]

Then, the surface configuration on the antiglare layer male and fomale(M﹠F) of anti-dazzle film is described.Dazzle in order more effectively to suppress, the texture when making the visualization outward appearance is homogeneous as one man, as the convex-concave surface form factor, and the one or more important documents below anti-dazzle film of the present invention preferably satisfies.

(1) in the cross section curve of the convex-concave surface that constitutes antiglare layer, arithmetic mean height Pa is more than the 0.05 μ m, below the 0.20 μ m, and maximum cross-section height Pt is more than the 0.2 μ m, below the 1.0 μ m, and average length PSm is more than the 15 μ m, below the 30 μ m

(2) convex-concave surface of formation antiglare layer has the protuberance more than 50, below 100 in the zone of 200 μ m * 200 μ m

(3) be that the polygonal average area that generatrix carries out forming when VShi is cut apart to its surface is 100 μ m on protuberance summit with the convex-concave surface that constitutes antiglare layer ²More than, 1000 μ m ²Below.

At first, arithmetic mean height Pa, maximum cross-section height Pt and average length PSm in the cross section curve of the convex-concave surface that constitutes antiglare layer are described.These values JIS B 0601 (=be prescribed in ISO4287), arithmetic mean height Pa is identical with the value that is called as roughness arithmetic average deviation value.

Under the situation of arithmetic mean height Pa in the cross section curve of convex-concave surface less than 0.05 μ m, the general planar because the anti-dazzle film surface becomes, becoming does not show sufficient anti-dazzle performance, so not preferred.In addition, under the situation of arithmetic mean height Pa greater than 0.2 μ m, because the surface configuration chap is faded and turned white, in addition, so the texture chap during the visualization outward appearance is not still preferred.Under the situation of maximum cross-section height Pt less than 0.2 μ m in the cross section curve of convex-concave surface, the anti-dazzle film surface general planar that still becomes does not show sufficient anti-dazzle performance thereby become, so not preferred.In addition, under the situation of maximum cross-section height Pt,, turn white or the low inferior problem of texture thereby fade, so not preferred still because the surface configuration chap greater than 1 μ m.Under the situation of average length PSm in the cross section curve of convex-concave surface less than 15 μ m, can not obtain sufficient anti-dazzle property, so not preferred.Think this be because, if average length PSm is too small, then near concavo-convex peak (thinking that its surficial inclination is roughly 0 °), so imaging during visualization.In addition, under the situation of average length PSm greater than 20 μ m, so the texture chap during owing to the visualization outward appearance is not still preferred.

Arithmetic mean height Pa in the cross section curve of convex-concave surface, maximum cross-section height Pt and average length PSm can use commercially available common contact surfaceness instrumentation fixed based on JIS B 0601.In addition, also can utilize confocal microscope, interference microscope, atomic force microscope devices such as (AtomicForce Microscope:AFM) to measure surface configuration, try to achieve by calculating from the three-dimensional information of its surface configuration.Wherein, under situation about calculating,, preferably measure the above zone of 200 μ m more than 3 * 200 μ m in order to guarantee sufficient datum length from three-dimensional information, with its mean value as measured value.

Then, the number to the protuberance that observes on convex-concave surface describes.If the number of the protuberance on the convex-concave surface is few, then under situation about being used in combination with the meticulous image display device of height, with the effect of the interference of pixel under, take place to dazzle, be difficult to observe image thereby become, and also variation of texture, so not preferred.In addition, if the number of protuberance becomes too much, then the angle of inclination of concave-convex surface shape becomes sharply as a result, and becoming fades easily turns white.Therefore, on convex-concave surface, preferably in the zone of 200 μ m * 200 μ m, has the protuberance more than 50, below 100.

During the number of the protuberance on trying to achieve the male and fomale(M﹠F) of anti-dazzle film, utilize confocal microscope, interference microscope, atomic force microscope devices such as (AFM) to measure surface configuration, try to achieve the D coordinates value of the each point on anti-dazzle film surface, utilize algorithm shown below to judge protuberance then, count its number.Promptly, when being conceived to the arbitrfary point on anti-dazzle film surface, the absolute altitude on the male and fomale(M﹠F) of point that not have absolute altitude than the point of having in mind around this point high and this point than the high situation in the centre of the absolute altitude of the absolute altitude of the peak of male and fomale(M﹠F) and minimum point under, with this summit as protuberance, the number on the summit of the protuberance that counting is tried to achieve in this wise is as the number of protuberance.

More specifically, as shown in Figure 5, be conceived to the arbitrfary point 21 on anti-dazzle film surface, with this point 21 is the center, describing the radius parallel with anti-dazzle film reference field 23 is the bowlder of 2 μ m～5 μ m, in the point on the anti-dazzle film surface 22 that the projecting plane 24 of this circle contains, there is not absolute altitude than the absolute altitude on the male and fomale(M﹠F) of the high point of the point had in mind 21 and this point than under the high situation in the centre of the absolute altitude of the absolute altitude of the peak of male and fomale(M﹠F) and minimum point, this point 21 is judged to be the summit of protuberance, tries to achieve the number of protuberance.At this moment, the radius of above-mentioned circle 24 is not preferably counted the thin concavo-convex of sample surfaces, and in addition, also asking it is the size that does not contain the degree of a plurality of protuberances, is about 3 μ m.When measuring, in order to reduce error, preferably measure the zone of 200 μ m * 200 μ m more than 3, with this mean value as measured value.

Using under the situation of confocal microscope, the multiplying power that preferably makes object lens is about 50 times, reduce the exploring degree measures.This is because if measure with high-resolution, then the working sample surface is thin concavo-convex, bring obstacle can for the counting of protuberance.In addition, be low range if make object lens, then the exploring degree of short transverse also reduces, so under the situation that is concavo-convex few sample, also can become sometimes is difficult to measure surface configuration.Under these circumstances, also can be after measuring with powerful object lens, add low-pass filter and reduce the high composition of spatial frequency to the data that obtain, can not see the thin pit that on convex-concave surface, observes until becoming, count the number of protuberance then.

Then, be that the polygonal average area that generatrix carries out forming when VShi is cut apart to its surface describes to protuberance summit with convex-concave surface.At first, describe, then dispose several points in the plane when (being called generatrix), can be called VShi figure, this is cut apart be called VShi and cut apart according to the arbitrfary point in this plane near the figure which generatrix is cut apart this plane if VShi cut apart.Fig. 6 represents the summit of the lip-deep protuberance of anti-dazzle film is carried out the example that VShi is cut apart as generatrix to this surface, and four jiaos point 26,26 is a generatrix, each polygon 27,27 that contains a generatrix is for to utilize VShi to cut apart the zone of formation, be called as VShi zone or VShi polygon, hereinafter referred to as the VShi polygon.In the figure, in the back the explanation around be coated with full part 28,28 than unfertile land.In VShi figure, the number of generatrix is consistent with the number in VShi zone.

Carrying out in this wise, is that the polygonal average area of VShi that generatrix carries out forming when VShi is cut apart is preferably 100 μ m with the summit of protuberance ²More than, 1000 μ m ²Below.Average area at this moment is lower than 100 μ m ²Situation under, the angle of inclination on anti-dazzle film surface becomes sharply, the result becomes to fade easily and turns white, so not preferred.In addition, at the polygonal average area of VShi greater than 1000 μ m ²Situation under because the chap of convex-concave surface shape, become and take place easily to dazzle, texture also worsens, so not preferred.

Asking by carrying out protuberance summit with anti-dazzle film surface is that the VShi of generatrix is when cutting apart the polygonal average area of VShi that obtains, utilize confocal microscope, interference microscope, atomic force microscope devices such as (AFM) to measure surface configuration, ask the D coordinates value of the each point on anti-dazzle film surface, utilize algorithm shown below then, carry out VShi and cut apart, ask the polygonal average area of VShi.That is,, ask the summit of the lip-deep protuberance of anti-dazzle film at first according to the algorithm of front with reference to Fig. 5 explanation, then, to the summit of this protuberance of anti-dazzle film reference field projection.Then, all three-dimensional coordinates that utilize the mensuration of surface configuration to obtain to this reference field projection, carry out VShi and cut apart by making these all points that are projected belong to immediate generatrix, cut apart the polygonal area that obtains, ask the polygonal average area of VShi by asking.When measuring, in order to reduce error, to the tangent VShi polygon in border of measuring the visual field, as the number counting of the protuberance of front, and when asking average area, do not count.In addition, preferably,, get its mean value as measured value to 200 μ m * 3 above points of 200 μ m area tests in order to reduce error at measurment.

As the ground explanation of front part, Fig. 6 is expression with the protuberance summit of anti-dazzle film is the VShi figure that generatrix carries out the example of VShi when cutting apart.Have a plurality of generatrix the 26, the 26th, the protuberance summit of anti-dazzle film utilizes VShi to cut apart, and a generatrix 26 is distributed a VShi polygon 27.In the figure, as mentioned above, tangent and be coated with full VShi polygon 28,28 than unfertile land and in the calculating of average area, do not count with the border in the visual field.In addition, in the figure, only a part of generatrix and VShi polygon are marked the line and the symbol of drawing, have a plurality of generatrixs and VShi polygon but can easily understand from above explanation and this figure.

[transparent supporting body and antiglare layer]

Anti-dazzle film of the present invention forms the antiglare layer with fine convex-concave surface on transparent supporting body.Transparent supporting body supports has the antiglare layer of convex-concave surface, can comprise optically transparent in fact resin film.As the example of transparent supporting body, can enumerate that to comprise with triacetyl cellulose, polyethylene terephthalate, polymethylmethacrylate, polycarbonate, norborene based compound be the solvent cast film of thermoplastic resins such as noncrystalline cyclic polyolefin of monomer or extrusion film etc.

Antiglare layer forms on transparent supporting body as being endowed the layer that satisfies the concave-convex surface that sees through scattering properties as explanation in the above.This antiglare layer also can utilize the method as described below of in the past extensively carrying out to make, that is: coating has been dispersed with the resin solution of filling agent on transparent supporting body, adjust coating film thickness, filling agent is exposed on the coated film surface, on transparent supporting body, form random concavo-convex thus.But it is preferred by carrying out the concave-convex surface that transfer printing forms antiglare layer from mould with male and fomale(M﹠F).Then, relative adhesive resin 100 weight portions, this antiglare layer contain preferably that 10～100 weight portion mean grain sizes are that 5 μ m are above, 15 μ m following and with the refringence of adhesive resin be particulate more than 0.01, below 0.06, and then, preferred this particulate buries fully in antiglare layer, and particulate does not influence the concaveconvex shape on surface.Like this, can be by the scattering-in of control surface micro concavo-convex shape independently with anti-dazzle film, separately control the surperficial micro concavo-convex shape of anti-dazzle film of major decision reflection characteristic and major decision composition through the antiglare layer of characteristic.The result can easily realize above-mentioned optical characteristics.The back describes the formation of this antiglare layer in detail.

Even anti-dazzle film of the present invention is that the male and fomale(M﹠F) side does not have under the state of low-reflection film in its outmost surface, also brings into play sufficient anti-dazzle function, but also can under outmost surface adds the state of low-reflection film, use.Low-reflection film can form by the layer that its low low-index material of refractive index ratio is set on antiglare layer.As such low-index material, particularly, can enumerate at acrylic resin or epoxy is to contain lithium fluoride (LiF), magnesium fluoride (MgF in resin etc. ₂), aluminum fluoride (AlF ₃), rock quartz (3NaFAlF ₃Or Na ₃AlF ₆) wait the low reflecting material of inorganic system of particulate inorganic material, in addition, also can enumerate organic low reflecting materials such as organic compound, thermoplastic resin, thermohardening type resin, ultraviolet curing resin of fluorine system or silicone-based.

[being used to make the manufacture method of the mould of anti-dazzle film]

Then, the manufacture method that forms irregular mould on the surface that can make the method for anti-dazzle film of the present invention well and be used to obtain this anti-dazzle film is described.Anti-dazzle film of the present invention can advantageously be made by process as described below, that is: use forms irregular mould with the regulation shape, the male and fomale(M﹠F) of this mould is transferred to transparent resin film, then, strips off the transparent resin film of transfer printing male and fomale(M﹠F) from mould.More specifically, by method manufacturing as described below, that is: implement copper facing or nickel plating at metallic surface, grind this plate surface, form concavo-convex to this abrasive surface collision particulate then, enforcement makes the processing of this concaveconvex shape rust, then this male and fomale(M﹠F) is implemented chromium plating, becomes mould, male and fomale(M﹠F) to this mould of resin transfer that on transparent supporting body, is coated with, then, to each transparent supporting body, stripping off transfer printing from mould has this concavo-convex resin.In the method, in order to obtain having concavo-convex mould, copper facing or nickel plating are implemented in the surface of metal base, grind this plate surface, form concavo-convexly then to this abrasive surface collision particulate, implement to make the processing of this concaveconvex shape rust, implement chromium plating to this male and fomale(M﹠F) then, make mould.

At first, the collision particulate forms concavo-convex, and then on the surface of the metal base that forms chrome plating, implements copper facing or nickel plating.Like this, can improve the adhesiveness or the glossiness of the chromium plating in the operation of back by implementing copper facing or nickel plating at the metallic surface that constitutes mould.Implement under the situation of chromium plating on the surface of Xiang Tie etc. or on chromium plating surface with sand-blast or penetrate pearl method etc. and form concavo-convex and then implement under the situation of chromium plating, as the front background technology the item described in, surface roughening easily, produce thin crack, bring bad influence for sometimes the shape of anti-dazzle film.Relative therewith, by implement copper facing or nickel plating on the surface, visible so bad situation disappears.This be because, copper facing or nickel plating are because the spreadability height, in addition, the smoothing effect is strong, so smooth and have a surface of gloss thereby form the small concavo-convex or nest that buries metal base etc.Think the characteristic that to utilize these copper facing and nickel plating, eliminate being considered to be in the coarse of exist in the metal base small concavo-convex or chromium plating surface that nest causes, in addition, also think because the spreadability height of copper facing or nickel plating, so can lower the generation in thin crack.

Copper described herein or nickel also can be based on the alloy of copper or based on the alloy of nickel except can be simple metal separately.Thereby described in this manual copper-clad is drawn together copper and aldary, and in addition, nickel comprises nickel and nickel alloy.Copper facing and nickel plating can utilize the electrolysis plating to carry out respectively, also can utilize electroless plating to carry out, but adopt the electrolysis plating usually.

As constituting the preferred metal of mould institute,, can enumerate aluminium or iron from the viewpoint of cost.And then, from the convenience of operation, more preferably light-duty aluminium.Aluminium described herein or iron also can be the alloy based on aluminium or iron except can being respectively simple metal.Implement copper facing or nickel plating on the surface of such metal base, and then grind its surface, obtain more level and smooth and have the surface of gloss, form fine concavo-convex then to its surface collision particulate, enforcement makes the processing of this concaveconvex shape rust, further to plating chromium in fact, constitutes mould then.

When implementing copper facing or nickel plating, if coating is thin excessively, then can not get rid of the influence of base metal, so its thickness is preferably more than the 10 μ m.The upper limit of thickness of coating is not a critical value, but waits from cost, is enough to about common 500 μ m.

The shape of mould can be flat sheet metal, also can be metallic roll cylindric or cylindraceous.If use metallic roll to make mould, then can be continuous make anti-dazzle film with the roller shape.

Fig. 7 is to use dull and stereotyped situation to be example, to schematically show the sectional view until the operation that obtains mould.The cross section of the base material after copper facing or nickel plating and the mirror ultrafinish has been implemented in Fig. 7 (A) expression, forms coating 32 on the surface of metal base 31, and its surface becomes abrasive surface 33.Surface collision particulate by the coating after such mirror ultrafinish 32 forms concavo-convex.Fig. 7 (B) is the cross section mode chart of the base material 31 after the collision particulate, by the collision particulate, forms the fine concave surface 34 of spherical calotte shape.Fig. 7 (C) is a cross section mode chart of implementing to make the base material 31 after the processing of concaveconvex shape rust on the concavo-convex face that utilizes particulate to form in this wise, and (C1) expression utilizes etch processes to make the state of its rust, (C2) represents to utilize copper facing to make the state of its rust.Wherein, in (C1), dot and be equivalent to utilize etching to make the state of the spherical calotte shape concave surface of (B) before its rust.In the example of the etch processes that adopts (C1), with the etched cutting of concave surface 34 acutangulate projections shown in (B), the projection that forms the acute angle on the spherical calotte is by the shape 36a of rust.On the other hand, in the copper-plated example that adopts (C2), form copper plate 35 on the concave surface shown in (B) 34, like this, the projection that forms the acute angle on the spherical calotte is by the shape 36b of rust.

Afterwards, by implementing chromium plating, further make the concaveconvex shape rust on surface.Fig. 7 (D) has implemented chromium plating cross section mode chart afterwards, (D1) be to utilize the etching shown in (C1) to make the male and fomale(M﹠F) 36a of its rust go up the cross section mode chart of implementing chromium plating, then (D2) is the cross section mode chart of implementing chromium plating on the copper plate shown in (C2) 35.The example that adopts etch processes from (C1) to (D1), utilizing the etching shown in (C1) to make on the face 36a of state of its rust, form chrome plating 37, this surface 38 is compared with the male and fomale(M﹠F) 36a of (C1), become the state that utilizes the further rust of chromium plating, in other words, become the state that concaveconvex shape has been relaxed.In addition, the copper-plated example that adopts from (C2) to (D2), on the fine concave surface that forms on copper facing on the base material 31 or the nickel dam 32, form copper plate 35, and then forming chrome plating 37 thereon, its surface 38 utilizes chromium plating, becomes the state of comparing further rust with the male and fomale(M﹠F) 36b of (C2), in other words, become the state that concaveconvex shape has been relaxed.Like this, the surface collision particulate of copper facing or nickel dam 32 form concavo-convex after, by its concaveconvex shape being implemented the surface 36 (36a or 36b) of the processing that makes its rust, implement chromium plating, can in fact do not had the mould of par.In addition, such mould is suitable for obtaining showing the anti-dazzle film of outstanding optical characteristics.

On the coating that comprises copper or nickel on the base material, under the polished state in surface, the collision particulate, but especially preferably ground with the state near minute surface.This is because the sheet metal or the metallic roll that become base material are implemented machinings such as cutting or grinding mostly in order to become the precision of wanting, thus at substrate surface residual process eye.Even sometimes under the state of having implemented copper facing or nickel plating, these processing eyes also can be residual, in addition, under the state of having electroplated, is not limited to the surface cunning that flattens fully.Under the state of residual dark processing eye etc., even the collision particulate makes the substrate surface distortion, with concavo-convex the comparing of utilizing particulate to form, processing eye etc. is concavo-convex darker sometimes, has the possibility of the influence of residual process eye etc.Using such mould to make under the situation of anti-dazzle film, sometimes optical characteristics is brought the not influence of expectability.

The method of grinding the substrate surface be implemented plating is not particularly limited, can uses any one of mechanical milling method, electrolytic polishing method, chemical grinding method.As mechanical milling method, but illustration superfinishing method, friction (rubbing), fluid polishing, polishing method etc.Surfaceness after the grinding is represented with roughness arithmetic average deviation value Ra, is preferably below the 0.5 μ m, more preferably below the 0.1 μ m.If it is excessive that Ra becomes, even then the collision particulate makes the metallic surface distortion, so the influence of the surfaceness before the yet possible residual deformation is not preferred.In addition, the lower limit of Ra is not particularly limited, from the viewpoint of process time or processing cost, because can there be the limit in nature, so needn't formulate especially.

As method, be fit to use and spray processing method to the surface collision particulate that is implemented plating of base material.Spray processing method and comprise sand-blast, shot-peening method, liquid honing method etc.As the particle that in these processing, uses, compare with the shape that has acute angle, the shape of preferred subglobular, in addition, thereby preferred can work in-process by the damaged particle that the hard material of acute angle occurs.As the particle that satisfies these conditions,, then preferably use the pearl of Zirconia ball or the pearl of aluminium oxide if be the particle of pottery system.In addition, if be the particle of metal system, the then pearl of preferred steel or stainless steel system.And then, also can use the particle of in resin binder, carrying on a shoulder pole the particle of holding pottery or metal.

As the particulate that collides on the surface that is implemented plating of base material, preferably using mean grain size is the particulate of 10～150 μ m, and the preferred especially particulate that uses sphere thus, can be made the anti-dazzle film that shows outstanding anti-dazzle performance.If the mean grain size of particulate less than 10 μ m, then becomes and is difficult on the surface that is implemented plating to form concavo-convex fully, be difficult to obtain sufficient anti-dazzle performance thereby become.On the other hand, if the mean grain size of particulate greater than 150 μ m, then concave-convex surface chap, thus take place easily to dazzle or texture reduces.At this, be that particulate below the 15 μ m adds man-hour using mean grain size, that adopts preferably that particle can be because of generation aggegations such as static makes it be scattered in the wet blast method of processing in the suitable dispersion medium.

In addition, the use amount of the pressure of collision during particulate, particulate, the distance from the nozzle of spraying microparticles to the metal surface etc. also can influence the concaveconvex shape after the processing, and then influence the surface configuration of anti-dazzle film, but usually as long as the gauge pressure of corresponding 0.05～0.4MPa degree, corresponding every 1cm of metal to be processed ²Surface area be about 4～12g particulate loading, to also have from the nozzle of spraying microparticles be that the kind of particulate of distance, use about 200～600mm or particle diameter, the kind of metal, its shape of nozzle of spraying microparticles, the concaveconvex shape that needs etc. are suitably selected to get final product to the metal surface.

By the arithmetic mean height Pa to the concaveconvex shape preferred cross-sections curve of collision particulate formation on the surface of implementing to electroplate of base material is more than the 0.1 μ m, below the 1 μ m, and the arithmetic mean height Pa of its cross section curve and the ratio Pa/PSm of average length PSm are more than 0.02, below 0.1.Arithmetic mean height Pa less than 0.1 μ m or than Pa/PSm less than 0.02 situation under, enforcement makes the man-hour that adds of concaveconvex shape rust before chromium plating processing, convex-concave surface roughly becomes tabular surface, is difficult to obtain the mould of the surface configuration of needs.In addition, arithmetic mean height Pa greater than 1 μ m or than Pa/PSm greater than 0.1 situation under, have under strong condition, to make the processing of the concaveconvex shape rust before the chromium plating processing, be difficult to the control surface shape thereby become easily.

Thereby carrying out on copper facing or the irregular base material of nickel plating surface formation, implementing to make the processing of concaveconvex shape rust in this wise.As the processing that makes the concaveconvex shape rust, as in front with reference to Fig. 7 (C) and (D) illustrated, preferably etch processes or copper facing.By carrying out etch processes, the sharp keen part of the concaveconvex shape that the collision particulate is made disappears.Like this, the optical characteristics of the anti-dazzle film of making as mould the time changes to preferred direction.In addition, copper facing so compare with chromium plating, makes the effect of concaveconvex shape rust strong because the smoothing effect is strong.Like this, the optical characteristics of the anti-dazzle film of making as mould the time changes to preferred direction.

Etch processes is by using iron chloride (FeCl ₃) aqueous solution, cupric chloride (CuCl ₂) aqueous solution, alkali etching liquid (Cu (NH ₃) ₄Cl ₂) wait corrosion surface to carry out, but also can use strong acid such as hydrochloric acid or sulfuric acid, also can use the contrary electrolytic etching of current potential opposite when applying with metallide.The concavo-convex blunt state (なまり tool closes) after the etch processes implemented according to the kind of base metal, utilize concavo-convex size that gimmick such as sandblast obtains and the degree of depth etc. different and different, so cannot treat different things as the same, and the factor that has the greatest impact at the blunt state aspect of control is an etch quantity.Said etch quantity is meant the thickness of the coating of etched cutting.If etch quantity is little, then make the effect of the concavo-convex surface configuration rust that gimmicks such as utilizing sandblast obtains insufficient, the optical characteristics that this concaveconvex shape is transferred to the anti-dazzle film that obtains on the transparent membrane is not so good.On the other hand, if etch quantity is excessive, then concaveconvex shape almost disappears, and becomes the mould of general planar, does not show anti-dazzle property so become.Therefore, etch quantity is preferably more than the 1 μ m, below the 20 μ m, and then is preferably more than the 2 μ m, below the 10 μ m.

Under the situation that adopts copper facing as the processing that makes its rust, concavo-convex blunt state according to the kind of base metal, utilize the concavo-convex size and the degree of depth that gimmick such as sandblast obtains, also have the kind of electroplating or thickness etc. different and different, so cannot treat different things as the same, and the factor that has the greatest impact at the blunt state aspect of control is an electroplating thickness.If the thin thickness of copper plate then makes the effect of the concavo-convex surface configuration rust that gimmicks such as utilizing sandblast obtains insufficient, the optical characteristics that this concaveconvex shape is transferred to the anti-dazzle film that obtains on the transparent membrane is not so good.On the other hand, if electroplating thickness is blocked up, then throughput rate variation, and concaveconvex shape almost disappears, and does not show anti-dazzle property so become.Therefore, copper-plated thickness is preferably more than the 1 μ m, below the 20 μ m, and then is preferably more than the 4 μ m, below the 10 μ m.

After making the surface configuration rust that on copper facing or nickel plating surface, has formed concavo-convex base material in this wise,, make making further rust and improve the metallograph of its skin hardness simultaneously of concavo-convex surface by further enforcement chromium plating.The concavo-convex blunt state of this moment also according to the kind of base metal, utilize the concavo-convex size and the degree of depth that gimmick such as sandblast obtains, also have the kind of electroplating or thickness etc. different and different, so cannot treat different things as the same, and still be electroplating thickness in the factor that the blunt state aspect of control has the greatest impact.If the thin thickness of chromium coating then makes the effect of the concavo-convex surface configuration rust that obtains before chromium plating processing insufficient, the optical characteristics that this concaveconvex shape is transferred to the anti-dazzle film that obtains on the transparent membrane is not so good.On the other hand, if electroplating thickness is blocked up, throughput rate variation then, but also can be called as the plating defective of the overshooting shape of joint knot (nodule).Therefore, the thickness of chromium plating is preferably more than the 1 μ m, below the 10 μ m, and then is preferably more than the 2 μ m, below the 6 μ m.

If for the chromium plating, then glossy, the hardness height, friction factor is little, and good release property is provided.Kind to chromium plating is not particularly limited, but preferred the use is called as so-called gloss chromium plating or decorates the chromium plating that manifests good gloss with chromium plating etc.Chromium plating utilizes electrolysis to carry out usually, as its electroplate liquid, uses and contains chromic anhybride (CrO ₃) and the aqueous solution of a spot of sulfuric acid.Can control the thickness of chromium plating by regulating current density and electrolysis time.

Preferred its Vickers (Vickers) hardness of die surface of having implemented chromium plating is more than 800, more preferably more than 1000.If Vickers hardness is low, permanance when then mould uses reduces and chromium plating brings hardness to reduce, unusual possibility height takes place in electrobath composition or electrolytic condition etc. when electroplating processes thus, for the situation occurred of defective, brings the possibility of bad influence also high.

Disclose in the metallic substrate surface that becomes mould in the patent documentation 1 (spy opens the 2002-189106 communique) of technology proposition as a setting or the patent documentation 4 (spy opens the 2004-90187 communique) in front and carried out chromium plating, and because the kind of substrate before the plating of mould and chromium plating is different, can rough surface take place after plating or the small crack that a lot of chromium plating cause takes place mostly, as a result, the optical characteristics of the anti-dazzle film that will make develops to bad direction.The metal base that is in the coarse state of plate surface can not be used for the mould that anti-dazzle film is used.This is because to dazzle and grind coating surface after chromium plating in order to eliminate usually, and as described later, the grinding on the surface after the present invention does not preferably electroplate.In the present invention, implement copper facing or nickel plating, eliminate because chromium plating and incidental so bad situation by basad metal.

Before implementing chromium plating, not have to implement to make under the situation of processing of concaveconvex shape rust,, have to add hard chromium and plate in order to make the sharp keen part rust of the concaveconvex shape that the collision particulate makes fully.But,, then become the joint knot take place easily, so not preferred if make the thickness of chromium plating blocked up.In addition, under the situation of the thin thickness that makes the chromium plating, can not make the concaveconvex shape rust of collision particulate making fully, thereby can not obtain the mould of desirable surface configuration, so use the anti-dazzle film of this Mold Making also can not show outstanding anti-dazzle performance.

In above-mentioned patent documentation 1 (spy opens the 2002-189106 communique), put down in writing to utilize sand-blast or penetrate and formed concavo-convex die face on the roller that chromium plating forms on the surface of pearl method at iron, implement chromium plating then, in addition, in patent documentation 3 (spy opens the 2004-29240 communique) and patent documentation 4 (spy opens the 2004-90187 communique), put down in writing and implemented to penetrate pearl method or blasting treatment on roller surface.But, enforcement makes on the basis of processing of surface configuration rust energetically after the collision particulate forms concaveconvex shape, do not mention the method that chromium plating processing makes concave-convex surface shape rust of implementing, discussion according to inventor etc., if implement to make the processing of surface configuration rust as described above energetically, then can not make the anti-dazzle film that shows outstanding anti-dazzle performance.

In addition, preferably do not giving the plating beyond the enforcement chromium plating on the concavo-convex metal surface.This is because if be chromium plating in addition, then owing to hardness or wearing quality step-down, so reduce as the permanance of mould, in use concavo-convex meeting wears away or mould can damage.If be the anti-dazzle film that obtains from such mould, then be difficult to obtain the possibility height of sufficient anti-dazzle function, in addition, the possibility that defective takes place on film also uprises.

After the chromium plating, lapped face and be favourable as the male and fomale(M﹠F) of mould directly not with chromium plating face.In above-mentioned patent documentation 4 (spy opens the 2004-90187 communique), put down in writing the surface of grinding after electroplating, and preferably do not ground chromium plating face in the present invention in this wise.This is because reason as described below, that is: owing to produce flat portions by grinding in outmost surface, so may cause the deterioration of optical characteristics, the controlling elements of shape increase, thereby becomes and be difficult to control the good shape of repeatability etc.Fig. 8 be to the processing of having implemented to make the concaveconvex shape rust that the collision particulate obtains and at this for having implemented the etch processes shown in Fig. 7 (C1) after and implemented equally under the situation that the face of the chromium plating shown in (D1) carried out grinding, the cross section mode chart of the metallograph of generation tabular surface.Utilizing in the concave-convex surface 38 that grinds the chromium coating 37 that on the surface of copper facing or nickel dam 32, forms, protruding being cut of a part, thus produce tabular surface 39.Fig. 8 represents to grind after the etching shown in Fig. 7 (D1) example of the situation on the surface of chromium plating, even but after the copper facing shown in Fig. 7 (D2), carried out under the situation of chromium plating, as long as grind its surface, then similarly produce tabular surface.

[manufacture method of anti-dazzle film]

Then, the operation of using the mould that obtains in this wise to make anti-dazzle film is described.Utilize the shape of the mould that method as previously described obtains by transfer printing on transparent resin film, obtain anti-dazzle film.Mold shape preferably utilizes embossing to carry out to the transfer printing of film.As embossing, but illustration is used the UV embossing of light-cured resin, the heat embossing method of use thermoplastic resin.

If be the UV embossing, then form the light-cured resin layer on the surface of transparent supporting body, push this light-cured resin layer and it is solidified to the male and fomale(M﹠F) of mould, thus to the male and fomale(M﹠F) of light-cured resin layer roller mould.Particularly, on transparent supporting body, apply ultraviolet curing resin, adhere at the ultraviolet curing resin that makes coating under the state of male and fomale(M﹠F) of mould, from transparent support side irradiation ultraviolet radiation, ultraviolet curing resin is solidified, then, peel off the supporter that is formed with the ultraviolet curing resin layer after the curing, thus to the shape of ultraviolet curing resin roller mould from mould.Kind to ultraviolet curing resin is not particularly limited.In addition, the statement of ultraviolet curing resin is arranged, but also can become the resin of the visible-light curing that can utilize wavelength ratio ultraviolet line length by selective light initiating agent suitably.That is, ultraviolet curing resin described herein is the general name that also comprises the resin of such visible-light curing type.On the other hand, if be the heat embossing method, then under heated condition to the transparent thermoplastic resin membrane of mould extruding, and to the surface configuration of thermoplastic resin membrane's roller mould.In these embossings, from the viewpoint of throughput rate, preferred UV embossing.

The transparent supporting body that uses in the making of anti-dazzle film for example can use to comprise with triacetyl cellulose, polyethylene terephthalate, polymethylmethacrylate, polycarbonate, norborene based compound to be the solvent cast film of the thermoplastic resins such as noncrystalline cyclic polyolefin of monomer or extrusion film etc. so long as optically transparent in fact resin film gets final product.

As ultraviolet curing resin, can use commercially available ultraviolet curing resin.For example, can be respectively separately or mix using more than 2 kinds of they with polyfunctional acrylic esters such as trimethylolpropane triacrylate, tetramethylol methane tetraacrylates, the material that itself and " Irgacure907 ", " Irgacure184 " (above cling to the fine chemistry industry corporate system for vapour), " Lucirin TPO " Photoepolymerizationinitiater initiaters such as (BASF AG's systems) are mixed is as ultraviolet curing resin.

As the thermoplastic transparent resin film that in the heat embossing method, uses, so long as transparent in fact transparent resin film gets final product, for example can use with polymethylmethacrylate, polycarbonate, polyethylene terephthalate, triacetyl cellulose, norborene based compound to be the solvent cast film of the thermoplastic resins such as noncrystalline cyclic polyolefin of monomer or extrusion film etc.These transparent resin films also can become the transparent supporting body of the situation of the UV embossing that employing illustrates in addition in the above.

Anti-dazzle film of the present invention preferably uses with the regulation shape and forms concavo-convex mould, utilization is transferred to the male and fomale(M﹠F) of this mould the resin that is coated with and then strips off the method that transfer printing has the resin of male and fomale(M﹠F) from mould on transparent supporting body, thereby form surperficial micro concavo-convex shape, in the resin that in transfer printing, uses preferred adhesive resin 100 weight portions relatively contain 10～100 weight portion mean grain sizes be more than the 5 μ m, below the 15 μ m and with the refringence of adhesive resin be particulate more than 0.01, below 0.06.

The mean grain size of the particulate that cooperates in adhesive resin is lower than under the situation of 5 μ m, and the value that sees through the large angle side of scattering curve rises, and the result can make contrast reduce when being applicable to image display device, so not preferred.On the contrary, be higher than in this mean grain size under the situation of 15 μ m, fully bury viewpoint in adhesive resin, have the trend of thickness thickening for particle is buried from preferably making particle as described later.As a result, when application of resin, bad situations such as warpage or aggegation take place easily.

In addition, be lower than in the refringence of particulate and adhesive resin under 0.01 the situation, because the scattering-in effect that particulate causes diminishes, thereby dazzle and must in adhesive resin, add a large amount of particulates so eliminate for scattering properties that regulation is provided to antiglare layer and turbidity, from making particulate fully bury viewpoint in adhesive resin, not preferred.On the contrary, be higher than in this refringence under 0.06 the situation, the reflectivity because refringence is big on the interface of adhesive resin and particulate increases, the result, and backscattering rises, and so the total light transmittance reduction is not preferred.The solidfied material of aforesaid ultraviolet curing resin illustrates the refractive index about 1.50 mostly, so design that can corresponding anti-dazzle film is suitably selected particulate from its refractive index is about 1.40～1.60 solidfied material.As particulate, preferably use resin bead, and be roughly spherical resin bead.Below enumerate the example of this preferred resin bead.

Melamine pearl (refractive index 1.57),

Polymethylmethacrylate pearl (refractive index 1.49),

Methyl methacrylate/styrene copolymer resin pearl (refractive index 1.50～1.59),

Polycarbonate pearl (refractive index 1.55),

Polyethylene beads (refractive index 1.53),

Polystyrene bead (refractive index 1.6),

Polyvinylchloride pearl (refractive index 1.46),

Silicone resin pearl (refractive index 1.46) etc.

In addition, these particulates preferably do not influence the concaveconvex shape on surface, that is, particle is fully buried in adhesive resin.This be because, protrude at particulate under the situation on surface, the shape of particulate causes the concave-convex surface change of shape, influences the reflection characteristic of anti-dazzle film (anti-dazzle performance or fade turn white etc.) thereby become.Protrude in this wise at particulate under the situation on surface, except the surface configuration of above-mentioned mould, also have to the shape of particle, concentration, dispersiveness etc. are taken into account and carry out the design of surface configuration, so the design of surface configuration control becomes numerous and diverse and difficult, be difficult to the characteristic that obtains expecting thereby become.Therefore, preferably only utilize mould to control the main surface configuration that influences reflection characteristic, scattering properties is controlled with the combination of resin and particle independently.

[anti-dazzling polarizing plate]

The anti-dazzle film of the present invention of Gou Chenging is outstanding aspect antiglare effect as described above, and also can prevent from effectively to fade and turn white, thus the generation of suppress dazzling effectively and the reduction of contrast, so when being installed on image display device, it is outstanding that identification becomes.At image display device is under the situation of LCD, this anti-dazzle film can be applicable to polarization plates.Promptly; polarization plates mostly is the form that is fitted with protective film in the one side at least of the polaroid that comprises the polyvinyl alcohol resin film that adsorbs orientation iodine or dichroic dye usually greatly; and constitute this side protective film with anti-dazzle film of the present invention, become anti-dazzling polarizing plate by transparent support side applying polaroid and anti-dazzle film of the present invention at this anti-dazzle film.In this case, the one side of polaroid can remain unchanged, also can be stacked other protective film or optical thin film, in addition, also can be formed for fitting in the adhesive phase of liquid crystal cells.In addition, also can be on the one side at least of polaroid have been fitted the polarization plates of protective film, the anti-dazzle film of the present invention of fitting on the transparent support side, thus make the polarization plates of anti-dazzle property.And then, in the polarization plates of protective film of having fitted, also can make the polarization plates of anti-dazzle property by on the surface of this protective film, giving the concavo-convex of aforesaid anti-dazzle property.

[image display device]

Image display device of the present invention is to make up aforesaid the have anti-dazzle film of specific surface configuration or the device that anti-dazzling polarizing plate forms with image-displaying member.At this, representational image-displaying member is to possess the liquid crystal cells of enclosing liquid crystal between upper and lower base plate, thereby the liquid crystal panel that the state of orientation of utilizing voltage to apply to change liquid crystal is carried out the demonstration of image, and in addition, also but known various displays such as plasma display panel, CRT monitor, OLED display are suitable for anti-dazzle film of the present invention.Then, by above-mentioned anti-dazzle film being disposed at the identification side of image-displaying member, come the composing images display device.At this moment, the male and fomale(M﹠F) of anti-dazzle film is that the antiglare layer side is configured in the outside (identification side).Anti-dazzle film can directly fit in the surface of image-displaying member, and liquid crystal panel is become under the situation of image display means, also can for example fit in the surface of liquid crystal panel as described above by polaroid.Like this, the image display device that possesses anti-dazzle film of the present invention can utilize the concavo-convex scatter incident light on the surface that anti-dazzle film has and make mirroring that picture is dizzy to be reflected, thereby outstanding identification is provided.

In addition, even under the situation that anti-dazzle film of the present invention is applicable to the image display device that height is meticulous, also can not occur in dazzling seen in the anti-dazzle film in the past, become to have concurrently and mirror the performance that the inhibition that prevents, dazzles of turning white that prevents, fades, the reduction of contrast suppress and so on fully.

Embodiment

Embodiment below is shown, further specifies the present invention, but the invention is not restricted to these examples.In the example, the % of expression content or use amount and a part short of special record are weight basis.In addition, the evaluation method of mould in the following example or anti-dazzle film is as described below.

1. the mensuration of the Vickers hardness of mould

Use the ultrasound wave sclerometer " MIC10 " of Krautkramer corporate system, utilize method, measure Vickers hardness based on JIS Z2244.Utilize the surface of mould self to measure.

2. the mensuration of the optical characteristics of anti-dazzle film

(scattering curve)

Anti-dazzle film is fitted in the glass substrate that its male and fomale(M﹠F) becomes the surface, in this glass side, from the tilt direction of angle of regulation of relative film normal,, measure the scattered light intensity that sees through of film normal direction in anti-dazzle film male and fomale(M﹠F) side from He-Ne laser illumination directional light.In the mensuration of reflectivity, all use " the 3292 03 Optical Power Sensor " of Yokogawa Motor (strain) system to reach " 3292Optical Power Meter ".

(reflectivity curve)

To the male and fomale(M﹠F) of anti-dazzle film, from the direction of 30 ° of relative film normal inclinations, irradiation is from the directional light of He-Ne laser instrument, and the angle of measuring the reflectivity in the plane of containing film normal and direction of illumination changes.In the mensuration of reflectivity, all use " the 3292 03Optical Power Sensor " of Yokogawa Motor (strain) system to reach " 3292 Optical Power Meter ".

(turbidity)

Use is measured the turbidity of anti-dazzle film based on nephelometer " HM-150 " type of color technical institute system in (strain) village of JIS K 7136.In order to prevent the warpage of sample, use transparent adhesives on the optics, fit on the glass substrate, and make male and fomale(M﹠F) become the surface, under this state, measure total turbidity.When measuring inner turbidity, be roughly 0 triacetylcellulose film and carry out thereby on the anti-dazzle film convex-concave surface, attach turbidity with glycerine.

(reflection visibility)

Use is measured the reflection visibility of anti-dazzle film based on the reflection analyzer " ICM-IDP " of SUGA testing machine (strain) system of JIS K 7105.Even in this case, also in order to prevent the warpage of sample, transparent adhesives fits in glass substrate and makes after male and fomale(M﹠F) becomes the surface on using optics, measures.In addition,, on the glass of the glass plate that posts anti-dazzle film, thereby attach the thick black acrylic resin board of 2mm, under this state,, measure from sample (anti-dazzle film) side incident light with water adhesion in order to prevent reflection from back side glass.As mentioned above, the total value of the value measured of the 3 kinds of optical combs being to use the width of dark portion and bright portion to be respectively 0.5mm, 1.0mm and 2.0mm of measured value herein.

3. the mensuration of the surface configuration of anti-dazzle film

Use the confocal microscope " PL μ 2300 " of Sensofar corporate system, measure the surface configuration of anti-dazzle film.Even in this case, also in order to prevent the warpage of sample, and transparent adhesives fits in glass substrate and makes after male and fomale(M﹠F) becomes the surface on using optics, measures.When measuring, make the multiplying power of object lens become 50 times, reduce the exploring degree and measure.This be because, if measure, then can measure the thin concavo-convex of sample surfaces with high-resolution, bring obstacle for the counting of protuberance.

(the arithmetic mean height Pa in the cross section curve, maximum cross-section height Pt and average length PSm)

Based on the determination data that obtains in the above, utilize calculating based on JIS B 0601, ask arithmetic mean height Pa, maximum cross-section height Pt and average length PSm.

(number of protuberance)

Based on the coordinate figure of the three-dimensional of the anti-dazzle film that obtains in superincumbent mensuration surface each point, according to the front with reference to the algorithm that Fig. 5 illustrates, ask the region memory of 200 μ m * 200 μ m the number of protuberance.

(the polygonal average area of the VShi when VShi is cut apart)

Based on the coordinate figure of the three-dimensional of the anti-dazzle film that obtains in superincumbent mensuration surface each point, calculate with reference to the algorithm that Fig. 5 and Fig. 6 illustrate according to the front, ask the polygonal average area of VShi.

4. the evaluation of the anti-dazzle performance of anti-dazzle film

(mirror, fade and turn white and the visual valuation of texture)

In order to prevent reflection from the back side of anti-dazzle film, become the anti-dazzle film of fitting on the surperficial black acrylic resin board at male and fomale(M﹠F), in that the bright indoor of fluorescent light is housed, look observation from the male and fomale(M﹠F) sidelong glance, the degree and the texture that have or not, fade and turn white that mirror of visual valuation fluorescent light.Mirror, fade and turn white and texture utilizes for 1～3 3 stages respectively, estimate with following benchmark.

Mirror 1: do not observe and mirror.

2: a little observation is to mirroring.

3: observe clearly and mirror.

Fade and turn white 1: not observing fades turns white.

2: a little observation is turned white to fading.

3: observing clearly fades turns white.

Texture 1: eye is thin, and texture is good.

2: eye is slightly thick, and texture is poor slightly.

3: eye is thick significantly, and texture is poor.

(evaluation of dazzling)

Dazzle and utilize following method evaluation.That is, at first prepare to have the photomask of the pattern of the cell cube shown in the planimetric map of Fig. 9.In the figure, cell cube 40 forms the chromium light-shielding pattern 41 of key shape with live width 10 μ m on transparent substrate, and the part that does not form this chromium light-shielding pattern 41 becomes peristome 42.At this, use cell cube to be of a size of the cell cube that 254 μ m * 84 μ m (vertical * horizontal stroke of figure) thereby peristome are of a size of 244 μ m * 74 μ m (vertical * horizontal stroke of figure).A plurality of illustrated cell cubes arranged side by side in length and breadth form photomask.

Then, shown in the sectional view of Figure 10 signal, the chromium light-shielding pattern 41 of photomask 43 is placed the top of light box 45, the sample that utilizes bonding agent that anti-dazzle film 11 is fitted in glass plate 47 and to make its male and fomale(M﹠F) become the surface is placed on the photomask 43.In light box 45, configuration light source 46.By under this state in 49 visualizations of the position of the about 30cm of distance sample, come to estimate twinkling degree with 7 stage officials.1 grade is equivalent to not see fully twinkling state, and 7 grades are equivalent to seriously observe twinkling state, and 3 grades for observing twinkling state slightly.

(evaluation of contrast)

[" LC-42GX1W " of Sharp's (strain) system] peels off the polarization plates on table back of the body two sides from commercially available LCD.Replace these original (original) polarization plates, the polarization plates " スミカラ Application SRDB831E " that rear side and display surface side are all made by bonding agent applying Sumitomo Chemical (strain), make that absorption axes separately is consistent with the absorption axes of original polarization plates, and then on display surface lateral deviation vibration plate, by bonding agent, anti-dazzle film shown in each example below fitting makes male and fomale(M﹠F) become the surface.The LCD TV that starting obtains in this wise in the darkroom uses (strain) to open up brightness photometer " BM5A " type of Pu Kang system, measures the briliancy under black show state and the white show state, calculates contrast.At this, contrast is represented with the ratio of the briliancy of the black relatively show state of briliancy of white show state.

[embodiment 1]

(A) the embossing making of mould

Preparation is the iron roll of having implemented copper material plating (バラ one De メ Star キ) on the surface of iron roll (STKM13A of JIS) of 200mm at diameter.Copper material plating is the coating that comprises the silver coating/copper coating layer of copper plate/thin, and the thickness of coating integral body is about 200 μ m.This copper coatings of mirror ultrafinish, and then on this abrasive surface, use sand blasting unit ((strain) only making is made), at pearl use amount 8g/cm ²(the per unit surface area of roller), blasting pressure 0.15MPa (gauge pressure), the distance from the nozzle of spraying microparticles to the metal surface are under the condition of 450mm, spray eastern rope (East ソ one) zirconium oxide bead " TZ-B53 " (trade name, mean grain size 53 μ m) of Co., Ltd.'s system, give concavo-convex to the surface.To obtain with concavo-convex copper facing iron roll, carry out etching with copper chloride solution.Set the etch quantity of this moment for 8 μ m, then, carry out chromium plating processing, make the mould that embossing is used.At this moment, chromium is plated thickness setting and become 4 μ m.The Vickers hardness on the surface of the mould that obtains is 1000.

(B) making of anti-dazzle film

In ethyl acetate,, after curing, obtain to show the ultraviolet-curing resin composition of 1.53 refractive indexes with each composition below solid component concentration 60% dissolving.

60 parts of pentaerythritol triacrylates

40 parts of multifunctional urethane acrylate

(reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate)

Levelling agent has

Per relatively 100 parts of above-mentioned ultraviolet curing resins, adding 25 parts of mean grain sizes in this ultraviolet-curing resin composition is that 8 μ m and refractive index are methyl methacrylate/styrene copolymer resin pearl of 1.565, add ethyl acetate then, make the concentration of solid constituent (containing resin bead) become 50%, thus the preparation coating fluid.

On triacetyl cellulose (TAC) film of thick 80 μ m, be coated with above-mentioned coating fluid, make dried coating thickness become 10 μ m, in setting 60 ℃ dryer for dry 3 minutes.Male and fomale(M﹠F) to the mould of making in (A) pushes dried film with rubber roll, makes the ultraviolet-curing resin composition layer become die side, thereby makes its adhesion.Under this state,, be 20mW/cm from intensity from the TAC film side ²The high-pressure mercury-vapor lamp irradiates light, make it become 200mJ/cm with h ray conversion light quantity ²Thereby, the ultra-violet solidified resin composition layer is solidified.Afterwards,, peel off the TAC film, obtain comprising the transparent anti-dazzle film of the duplexer that has concavo-convex cured resin and TAC film from the teeth outwards from mould to each cured resin.

(evaluation of anti-dazzle film)

To the anti-dazzle film that obtains, utilize above-mentioned gimmick, estimate optical characteristics, convex-concave surface shape and anti-dazzle performance, its result is shown in table 1 with the kind and the amount of the manufacturing conditions of mould, the particulate that uses in antiglare layer is made.In addition, will be shown in 11 through the curve map of scattering curve respectively, the curve map of reflectivity curve will be shown in Figure 12.Wherein, in table 1, (A) for to the etch quantity when the Mold Making and the kind of the particulate that in antiglare layer is made, uses and the table that amount is concluded, (B) table, (C) table for the surface configuration and the anti-dazzle performance of anti-dazzle film are concluded for the optical characteristics of anti-dazzle film is concluded.Then, the detailed content of the reflection visibility in the table 1 (B) is as described below.

The reflection visibility

0.5mm optical comb: 1.4%

1.0mm optical comb: 5.4%

2.0mm optical comb: 9.6%

Amount to 16.4%

[embodiment 2]

Etch quantity when changing Mold Making in addition, carries out as shown in table 1ly similarly to Example 1, is produced on the surface and has the mould that concavo-convex embossing is used.The Vickers hardness on the surface of the mould that obtains is 1000.Use this mould, carry out similarly to Example 1, make being included in the transparent anti-dazzle film that the surface has the duplexer of concavo-convex cured resin and TAC film.

[embodiment 3 and 4]

Use the mould identical with embodiment 1, change simultaneously the kind of the particulate that in antiglare layer is made, uses and/or the addition of relative uv curing resin 100 weight portions as shown in table 1ly, in addition, carry out similarly to Example 1, make being included in the transparent anti-dazzle film that the surface has the duplexer of concavo-convex cured resin and TAC film.Wherein, the particulate that uses in embodiment 3 is methyl methacrylate/styrene copolymer resin pearl similarly to Example 1, and the particulate that uses in embodiment 4 is that 8 μ m and refractive index are 1.490 polymethylmethacrylate pearl as mean grain size.

The anti-dazzle film that obtains in embodiment 2～4 all is shown in table 1 with optical characteristics, surface configuration and the anti-dazzle performance of these anti-dazzle films with the data of embodiment 1.In addition, the curve map that sees through scattering curve and reflectivity curve of these anti-dazzle films is shown in Figure 11 and Figure 12 with the data of embodiment 1 respectively.

[comparative example 1 and 2]

In comparative example 1, use the mould identical with embodiment 1, in addition, in comparative example 2, use the mould identical with embodiment 2, all use the ultraviolet-curing resin composition that does not contain resin bead, in addition, carry out similarly to Example 1, make being included in the transparent anti-dazzle film that the surface has the duplexer of concavo-convex cured resin and TAC film.Optical characteristics, surface configuration and the anti-dazzle performance of the anti-dazzle film that obtains are shown in table 1 with the data of embodiment 1.In addition, the curve map that sees through scattering curve and reflectivity curve with these anti-dazzle films is shown in Figure 13 respectively, and the curve map of reflectivity curve is shown in Figure 14.

[table 1]

(A) manufacturing conditions of mould and the particulate in the antiglare layer

(B) optical characteristics of anti-dazzle film

(C) surface configuration of anti-dazzle film and anti-dazzle performance

As shown in table 1, the embodiment 1 and 2 that satisfies important document of the present invention shows outstanding anti-dazzle performance (low mirrors and good texture), and not taking place simultaneously dazzles or fade turns white, and when being applicable to image display device, also shows high contrast.In addition also as can be known, in the embodiment 3 and 4 that has increased inner turbidity, compare,, can more effectively suppress twinkling although contrast reduces slightly with embodiment 1 and 2.

Relative therewith, comparative example 1 and 2 is because surface configuration is roughly the same with embodiment 1 and 2 respectively, so show outstanding anti-dazzle performance, do not fade simultaneously and turn white, contrast also shows high value, but because at least one side of relative scattered light intensity T (20) and T (30) is lower than regulation of the present invention, so it is strong to dazzle, when being applicable to image display device, identification is reduced significantly.

At this, embodiment 1,3 and 4 uses identical Mold Making anti-dazzle film with comparative example 1, and in addition, embodiment 2 also uses identical Mold Making anti-dazzle film with comparative example 2.Then, the reflection characteristic of the anti-dazzle film of the Mold Making that these uses are identical is roughly equal, and by this result as can be known, the particulate of interpolation can not influence surface configuration.

[comparative example 3～5]

With embodiment 1 in the identical ultraviolet-curing resin composition (resin bead add before) that uses, per 100 parts of uv curing resins, adding 10 parts of mean grain sizes, to be about 10 μ m and refractive index be 1.46 porous silica particulate, and then, in comparative example 4 and 5, per 100 parts of uv curing resins, it is methyl methacrylate/styrene copolymer resin pearl of 1.57 that the mean grain size of the amount shown in the adding table 2 is about 3 μ m and refractive index, make its dispersion, afterwards, add ethyl acetate, make the concentration of solid constituent (containing silicon dioxide microparticle and resin bead) become 30%, thus the preparation coating fluid.

On triacetyl cellulose (TAC) film of thick 80 μ m, be coated with above-mentioned coating fluid, make dried coating thickness become 4 μ m, in setting 60 ℃ dryer for dry 3 minutes.From the Photocurable resin composition layer side of dried film, be 20mW/cm from intensity ²The high-pressure mercury-vapor lamp irradiates light, make it become 200mJ/cm with h ray conversion light quantity ²Thereby, the ultra-violet solidified resin composition layer is solidified, obtain being included in the transparent anti-dazzle film that the surface has the duplexer of concavo-convex cured resin and TAC film.In this anti-dazzle film, from the relation of the particle diameter (about 10 μ m) of silicon dioxide microparticle and coating thickness (4 μ m) as can be known, silicon dioxide microparticle protrudes in the antiglare layer surface.

To the anti-dazzle film that obtains, utilize above-mentioned gimmick, estimate optical characteristics, convex-concave surface shape and anti-dazzle performance, the composition with resin the results are shown in table 2.In table 2, (A) table, (B) table, (C) table for the surface configuration and the anti-dazzle performance of anti-dazzle film are concluded for the optical characteristics of anti-dazzle film is concluded for the particulate that cooperates in curable resin is concluded.In addition, will be shown in Figure 15 through the curve map of scattering curve respectively, the curve map of reflectivity curve will be shown in Figure 16.

[table 2]

(A) particulate in the antiglare layer

(B) optical characteristics of anti-dazzle film

(C) surface configuration of anti-dazzle film and anti-dazzle performance

As shown in table 2, in comparative example 3, because relative scattered light intensity T (20) and T (30) are lower than regulation of the present invention, so although contrast does not descend, it is strong to dazzle, and when being suitable for image display device, destroys identification significantly.In comparative example 4,,, destroy identification so contrast is reduced to below 1,800 because the relative scattered light intensity T (20) of 20 ° of incidents is higher than regulation of the present invention.In addition, in surface configuration, average length PSm is big, and the number of protuberance is few, and the polygonal average area of VShi is big, as a whole, become greater than the shape of shape of regulation in the present invention, thus scattered light intensity not only, and suppress fully to dazzle.In comparative example 5, because T (20) and T (30) greatly are higher than regulation of the present invention, so although do not take place to dazzle, contrast reduces significantly.In addition, in comparative example 3～5, generally speaking, average length PSm is big, and the polygonal average area of VShi is higher than regulation of the present invention, and in addition, the number of protuberance is lower than regulation of the present invention, the result, and texture is thick, becomes grainy appearance one by one.

[comparative example 6～9]

As antiglare layer, the polarization plates " スミカラ Application " of using Sumitomo Chemical (strain) to sell, for for the anti-dazzle film " AG3 " that disperses filling agent to form in the ultraviolet curable resin, " AG5 ", " SL6 ", " CV2 " (being respectively comparative example 6～9), utilize above-mentioned gimmick to estimate each optical characteristics, surface configuration and anti-dazzle performance, it be the results are shown in table 3.In table 3, (B) table, (C) table for the surface configuration and the anti-dazzle performance of optical thin film are concluded for the optical characteristics of anti-dazzle film is concluded.In addition, will be shown in Figure 17 through the curve map of scattering curve respectively, the curve map of reflectivity curve will be shown in Figure 18.

[table 3]

(B) optical characteristics of anti-dazzle film

(C) surface configuration of anti-dazzle film and anti-dazzle performance

In comparative example 6, because relative scattered light intensity T (20) and T (30) are lower than regulation of the present invention, so although contrast does not reduce, it is strong to dazzle, identification reduces significantly.In addition, because the important document of surface configuration all departs from regulation of the present invention,, become granular one by one outward appearance so texture is poor.In comparative example 7, because the relative scattered light intensity T (30) of 30 ° of incidents is lower than regulation of the present invention, so become twinkling result takes place.In comparative example 8 and 9, because generally speaking, scattered light intensity T (20) and T (30) are big relatively, so although do not take place to dazzle, contrast is greatly reduced.In addition, in comparative example 8, because the value of reflectivity R (40) and R (50) also is higher than regulation of the present invention, fading of turning white turned white so generation picture integral body becomes.

From above result as can be known, possessing in the present invention evenly, the important document of regulation is very important for the optical characteristics that realization becomes purpose of the present invention.

Utilizability on the industry

Anti-dazzle film of the present invention shows outstanding anti-dazzle performance and prevents simultaneously the reduction of the identification that fading turns white causes, in addition, when the image display device that is disposed at fine surperficial, become and do not take place to dazzle and manifest high-contrast. With polarizer group should the anti-dazzling polarizing plate of anti-dazzle film also manifests same effect. Then, become anti-dazzle performance height and identification of the image display device that disposes anti-dazzle film of the present invention or anti-dazzling polarizing plate is outstanding.

By various displays such as relative liquid crystal panel, plasma display device, CRT monitor, OLED displays, anti-dazzle film of the present invention is configured to the identification side that its anti-dazzle film becomes image-displaying member, then can not fade and turn white and dazzle, can swoon and mirror picture, outstanding identification is provided.

Claims

1. anti-dazzle film, it is the anti-dazzle film that is formed with the antiglare layer with fine convex-concave surface on transparent supporting body, wherein,

Relatively on the transparent support side of anti-dazzle film from the light of normal with certain angle incident, be determined at the scattered intensity that the normal direction of antiglare layer side sees through, when removing this value that sees through scattered light intensity as scattered light intensity relatively with the light intensity of light source,

Relative scattered light intensity T (20) on the antiglare layer side normal direction of transparent support side during with 20 ° of incident lights of incident angle is more than 0.0001% and below 0.0005%,

Relative scattered light intensity T (30) on the antiglare layer side normal direction of transparent support side during with 30 ° of incident lights of incident angle is more than 0.00004% and below 0.00025%.

2. anti-dazzle film according to claim 1, wherein,

From the antiglare layer side during with 30 ° of incident lights of incident angle,

The reflectivity R (30) that reflection angle is 30 ° is more than 0.05% and below 2%,

The reflectivity R (40) that reflection angle is 40 ° is more than 0.0001% and below 0.005%,

The reflectivity R (50) that reflection angle is 50 ° is more than 0.00001% and below 0.0005%.

3. anti-dazzle film according to claim 1, wherein,

The surface haze of vertical incidence light is more than 0.1% and below 5% relatively,

Total turbidity is more than 5% and below 25%.

4. anti-dazzle film according to claim 1, wherein,

Use the 3 kind optical combs of the width of dark portion and bright portion as 0.5mm, 1.0mm and 2.0mm, with the reflection visibility of 45 ° of mensuration of incident angle of light and be below 40%.

5. anti-dazzle film according to claim 1, wherein,

In the cross section curve of the convex-concave surface that constitutes antiglare layer,

Arithmetic mean height Pa is more than the 0.05 μ m and below the 0.2 μ m,

Maximum cross-section height Pt is more than the 0.2 μ m and below the 1 μ m,

Average length PSm is more than the 15 μ m and below the 30 μ m.

6. anti-dazzle film according to claim 1, wherein,

The convex-concave surface that constitutes antiglare layer has more than 50 and the protuberance below 100 in the zone of 200 μ m * 200 μ m.

7. anti-dazzle film according to claim 1, wherein,

On the protuberance summit with the convex-concave surface that constitutes antiglare layer is that the polygonal average area that generatrix carries out forming when VShi is cut apart to its surface is 100 μ m ²More than and 1000 μ m ²Below.

8. anti-dazzle film according to claim 1, wherein,

The concave-convex surface of antiglare layer is that the transfer printing by the mould that has male and fomale(M﹠F) certainly forms, and, in this antiglare layer, relative adhesive resin 100 weight portions, the mean grain size that contains 10～100 weight portions be that 5 μ m are above and 15 μ m are following and with the refringence of adhesive resin be 0.01 or more and 0.06 below particulate.

9. anti-dazzle film according to claim 8, wherein,

Described particulate buries fully in antiglare layer, does not influence surface configuration.

10. anti-dazzle film according to claim 1, wherein,

Convex-concave surface in antiglare layer is formed with low-reflection film.

11. an anti-dazzling polarizing plate is characterized in that,

Any described anti-dazzle film is fitted on the transparent support side of this anti-dazzle film in polaroid and the claim 1～10.

12. an image display device is characterized in that,

Possess any described anti-dazzle film or described anti-dazzling polarizing plate of claim 11 and image-displaying member in the claim 1～10, the mode that this anti-dazzle film or anti-dazzling polarizing plate are the outside with its antiglare layer side is configured in the identification side of image-displaying member.