CN100439949C - Laminated polarizing film - Google Patents
Laminated polarizing film Download PDFInfo
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- CN100439949C CN100439949C CNB031084508A CN03108450A CN100439949C CN 100439949 C CN100439949 C CN 100439949C CN B031084508 A CNB031084508 A CN B031084508A CN 03108450 A CN03108450 A CN 03108450A CN 100439949 C CN100439949 C CN 100439949C
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Abstract
The present invention relates to a laminated light polarizing membrane. Even when a protective membrane of the laminated light polarizing membrane is peeled off and then is pasted on a liquid crystal unit, the generated static electricity is little; in addition, defects such as display of bright points, etc. do not occur, and the performance of electrostatic interference resistance is realized. The laminated light polarizing membrane is formed by further laminating a layer with electrostatic interference resistance at the outer side of a reflecting light polarizing membrane or at least one of the reflecting light polarizing membrane and an absorbing light polarizing membrane through the lamination of the reflecting light polarizing membrane and the absorbing light polarizing membrane.
Description
Technical field
The present invention relates to that absorption-type light polarizing film and reflection type polarizing film lamination are had the laminated polarizing film of electrostatic prevention jamming performance, and relate to polarizing light source device and the liquid crystal indicator that uses them.
Background technology
In the manufacturing process of liquid crystal indicator, the static that produces when peeling off the diaphragm of light polarizing film becomes problem owing to bringing out the foreign matter shortcoming.And, follow the use of liquid crystal indicator in mobile phone etc., the stain when using in order to wipe, multipurpose cloth wiping display frame because the static that produces this moment, exist show disorderly.In addition, in recent years, as liquid crystal display apparatus with wide viewing angle, [for example, the spy opens flat 6-160878 communique (with reference to United States Patent (USP) 5,598,285) for example to use transverse field type liquid crystal cells (being also referred to as coplane on-off mode liquid crystal cells).], a little less than this transverse field type liquid crystal cells electrostatic prevention disturbs, for example in the assembling procedure of liquid crystal indicator, adhere to light polarizing film etc. on the liquid crystal cells after, when peeling off diaphragm, exist and show disorderly problem owing to peel off static.
As the method that solves these inconveniences that cause because of static, the method of coating electrostatic prevention agent interfering on cellulose-based resin substrate, as the example of its application, the method that the cellulose-based resin plate that use will apply the electrostatic prevention agent interfering is stacked in the Polarizer (absorption-type light polarizing film) that forms on the polariscope is knownly (to open flat 11-91038 communique with reference to the spy.)。
But, in recent years, on liquid crystal indicator, extensively adopt the brightness of using reflection type polarizing film to improve system's [for example, special table flat 9-511844 communique (with reference to WO95/27919).]。Reflection type polarizing film is to see through certain polarized light, and reflection has the light polarizing film with the polarized light of its opposite nature, and by recycle the light by this reflection type polarizing film reflection on light supply apparatus, the utilization ratio height of light is used to improve display brightness.Reflection type polarizing film, that uses separately lacks, and mainly, is to descend the many of use with the state with absorption-type light polarizing film lamination.In the instructions of the present invention, the light polarizing film of absorption-type light polarizing film and reflection type polarizing film lamination is called laminated polarizing film.Along with the extensive employing of this laminated polarizing film, necessarily require the countermeasure of the above-mentioned inconvenience that causes by static.
As the method for giving laminated polarizing film electrostatic prevention jamming performance, as using the absorption-type light polarizing film therein, the spy open put down in writing in the flat 11-91038 communique use the absorption-type light polarizing film, be stacked in simply under the situation on the reflection type polarizing film, determine to produce new inconvenience.Laminated polarizing film, the side of its absorption-type light polarizing film are to liquid crystal cells, and be bonding with liquid crystal cells.Constitute laminated polarizing film, when peeling off the molding film under the situation of the outside of the absorption-type light polarizing film that produces static face coating electrostatic prevention agent interfering (, during bonding liquid crystal cells, between absorption-type light polarizing film and liquid crystal cells, get involved the situation of electrostatic prevention agent interfering layer), can produce defectives such as showing bright spot.They are only to use under the situation of absorption-type light polarizing film no problemly, but under the situation of the laminated polarizing film of lamination reflection type polarizing film, in order to improve brightness, so electrostatic prevention agent interfering layer causes that the character of polarized light disorder has been observed really.
That is, give under the situation of laminated polarizing film electrostatic prevention jamming performance, it is not enough just using the absorption-type light polarizing film of the cellulose-based resin plate that has utilized coating electrostatic prevention agent interfering simply.
Summary of the invention
Even the object of the present invention is to provide under the situation of bonding liquid crystal cells after peeling off diaphragm, generation of static electricity is few, and, do not produce the laminated polarizing film that shows defectives such as bright spot with electrostatic prevention jamming performance.
A first aspect of the present invention, provide laminated polarizing film, it is characterized in that reflection type polarizing film and absorption-type light polarizing film lamination, further with the electrostatic prevention interfere with layer, be stacked in the outside (promptly opposite side) of reflection type polarizing film with the absorption-type light polarizing film, perhaps, between reflection type polarizing film and absorption-type light polarizing film either party.Here, the electrostatic prevention interfere with layer can directly form on reflection type polarizing film or absorption-type light polarizing film, that is, can be to apply filming of electrostatic prevention agent interfering on film.In addition, the electrostatic prevention interfere with layer can form the above so-called hard coat film layer of pencil hardness F.In addition, the electrostatic prevention interfere with layer can be the film with the cementability that contains pressure sensitive.In the laminated polarizing film of the present invention, further lamination optical compensation films.In addition, the electrostatic prevention interfere with layer can be or between reflection type polarizing film and absorption-type light polarizing film in the outside of reflection type polarizing film either party, perhaps can be on these two positions, and in the outside of absorption-type light polarizing film, promptly opposite with reflection type polarizing film side does not have.
A second aspect of the present invention provides the polarizing light source device that specific laminated polarizing film, light source part and reflecting plate by first aspect present invention are disposed successively.
A third aspect of the present invention provides in the front of the specific polarisation electro-optical device of above-mentioned second aspect, successively lamination liquid crystal cells and the film formed liquid crystal indicator of absorption-type polarisation.According to liquid crystal indicator of the present invention, because the electrostatic prevention interference effect is big, special serviceability height in the liquid crystal indicator that uses the transverse field type liquid crystal cells.
Description of drawings
Fig. 1 is the profile schema diagram of the basic layer structure example of expression laminated polarizing film of the present invention.
Fig. 2 is the profile schema diagram of the pressure-sensitive adhesive configuration of layer in the structure example of expression laminated polarizing film of the present invention.
Fig. 3 is the profile schema diagram of rhythmo structure of the electrostatic prevention interfere with layer of layer in the structure example of expression laminated polarizing film of the present invention.
Fig. 4 is the profile schema diagram of the layer structure example of expression liquid crystal indicator.
Fig. 5 is the profile schema diagram of other examples of the layer structure of expression liquid crystal indicator.
Among the figure: 10 expression laminated polarizing films, 21 expression reflection type polarizing films, 22 expression absorption-type light polarizing film, 23 expression electrostatic prevention interfere with layer, 24 expression (pressure-sensitive) tackifier, 30 expression liquid crystal cells, 31,32 expression transparency electrodes, 33 expression liquid crystal layers, 41 expression front face side absorption-type light polarizing film, 51 expression light sources, 52 expression light guide plate, 53 expression reflecting plates, 54 expression catoptrons, 61,62 expression light supply apparatuses, 64,65 expression polarizing light source devices, 67,68 expression liquid crystal indicators.
Embodiment
Be clear and definite the present invention, below, suitably, being described in detail with reference to appended accompanying drawing. Fig. 1 is the profile schema diagram of the basic layer of expression light polarizing film of the present invention structure example.According to laminated polarizing film of the present invention, define the lamination position of electrostatic prevention interfere with layer.One, shown in Fig. 1 (a), electrostatic prevention interfere with layer (23) is stacked in the outside (promptly relative with absorption-type light polarizing film side) of the reflection type polarizing film (21) of laminated polarizing film (10).That is, with absorption-type light polarizing film (22), reflection type polarizing film (21), electrostatic prevention interfere with layer (23) is lamination successively.Another shown in figure (b), makes electrostatic prevention interfere with layer (23), lamination between the absorption-type light polarizing film (22) of laminated polarizing film (10) and reflection type polarizing film (21).That is, with absorption-type light polarizing film (22), electrostatic prevention interfere with layer (23), reflection type polarizing film (21) is lamination successively.
In addition, electrostatic prevention interfere with layer either party in the outside of reflection type polarizing film or between reflection type polarizing film and absorption-type light polarizing film perhaps can be on two positions, and in the outside of absorption-type light polarizing film, promptly relative with reflection type polarizing film side does not have.
The electrostatic prevention interfere with layer, in limit with electrostatic prevention jamming performance, its structure, form is unrestricted, can use known technology.That is, in case the electrostatic interference agent is a major component, can mixes other organic compound as required and form the electrostatic prevention interfere with layer, also can be the film that forms by the electrostatic prevention agent interfering.The electrostatic prevention interfere with layer can formation itself has the film of self stability, is not having under the situation of self stability, can be used as the tunicle on the resin molding and forms.Under situation about forming on the resin molding, resin molding can be reflection type polarizing film or the absorption-type light polarizing film of using among the present invention.
The material of resin molding is not particularly limited.Consider operability, thermoplastic resin is a preferable material.Thermoplastic resin has no particular limits, can use known various resins, for example can use, the polyolefin-based resins of tygon or PP type, polystyrene resin, the polyvinyl chloride resin, polyvinyl acetate (PVA) is a resin, polyethylene terephthalate or PEN kind polyester series plastics, with the norborene or derivatives thereof is the cyclic polyolefin hydrocarbon system resin of polymer of monomers class, polycarbonate-based resin, polysulfones is a resin, and polyethersulfone is a resin, and the polyaryl ester is a resin, polyvinyl alcohol resin, polycarbamate is a resin, and polyacrylate is resin (being also referred to as acrylic resin), and polymethylacrylic acid is resin synthetic macromolecular compounds such as (being also referred to as the metha crylic resin), and, natural polymers such as cellulose-based resin such as cellulose diacetate or Triafol T.Synthetic high polymer is certain, and removing can be the monomer polymerization beyond the region of objective existence of a kind of monomer, also can be the multipolymer that 2 kinds of copolymerization or above formation form.If consider that an application target of laminated polarizing film of the present invention is to be assembled in the liquid crystal indicator, resin molding is preferably water white, and is still, under the purpose of decorating, coloured also passable.The electrostatic prevention agent interfering can use compound known.For example as the organic system compound, can enumerate acyloxy amido propyl dimethyl hydroxyl ethyl ammonium nitrate, acyloxy amido propyl trimethyl ammonium sulfate, cetyl morpholine mesylate, single-long-chain alkyl leptodactyline, two long chain alkyl dimethyl ammonium salts, tri-long-chain alkyl methyl ammonium salt, mono-acyloxy acid amides alkyl trimethyl ammonium salt, trialkyl-2-hydroxyethyl ammonium salt cationoid surfactant, or straight chained alkyl potassium phosphate, polyxyethylated potassium phosphate, chain alkyl sulfonate, sodium soap, fatty acid potassium, alkyl sodium sulfonate, alpha-olefin sodium sulfonate, monoalkyl phosphoric acid esters sodium, the anionic surfactant of high triacontanol sodium sulfovinate class, N, N-two (hydroxyethyl)-N-alkyl amine, its aliphatic ester derivatives, polyol fat acid moieties ester class, alkyl amino carboxylate, carboxybetaine, alkyl betaine, sulfobetaines, phosphoric acid betaine class nonionic is a surfactant etc.In addition,, can enumerate tin oxide, titanium dioxide, antimony-Xi composite oxides (ATO), indium-Xi composite oxides (ITO), indium-zinc composite oxide conductive metal oxides such as (IZO) for example as inorganic based compound.
When being coated to these electrostatic prevention agent interferings on the resin molding, as required, preferably in bonding agent, use the organic compound of low middle molecular weight.Organic compound as the low middle molecular weight that uses in the bonding agent is not particularly limited, and can use compound known.Wherein, preferred low middle molecular weight polyethylene glycol or polypropylene glycol, glycerine, polyvalent alcohols such as pentaerythrite, or its ether, the use of ester class.
In addition, the electrostatic prevention agent interfering can be dispersed in any one thermoplastic resin, heat-curing resin in the light-cured resin, forms the membranous body of electrostatic prevention agent interfering.The thermoplastic resin of Shi Yonging is not particularly limited herein, can use the thermoplastic resin of enumerating in above-mentioned resin molding material.The dispersion of electrostatic prevention agent interfering in these thermoplastic resins can be implemented by known methods such as mixing.
The heat-curing resin that can use in the electrostatic prevention interfere with layer is not particularly limited, and can use known various resins.For example can enumerate, epoxy is resin or phenolics, and melamine is a resin, and alkyd resin, urea are resin etc.The dispersion of electrostatic prevention agent interfering in these heat-curing resins behind the dispersion electrostatic prevention agent interfering, can be implemented to handle by known heat curing in the liquid feedstock composition of heat-curing resin.
The light-cured resin that can use in the electrostatic prevention interfere with layer is not particularly limited, and can use known various resins, and for example, can enumerate polyacrylate is that resin or polymethylacrylic acid are resin etc.The dispersion of electrostatic prevention agent interfering in these light-cured resins behind the dispersion electrostatic prevention agent interfering, can be implemented to handle by known photocuring in the liquid feedstock composition of light-cured resin.
When metal oxide is used for the electrostatic prevention agent interfering, can use, on resin molding, form the electrostatic prevention interfere with layer by known methods such as vapour deposition method or sputtering methods.In the resin molding, can use above-mentioned thermoplastic resin.And, in reflection type polarizing film or the absorption-type light polarizing film, can directly form the electrostatic prevention interfere with layer.
As the yardstick of the electrostatic prevention jamming performance of electrostatic prevention interfere with layer, can enumerate the intrinsic resistance value in surface.In order to use in the present invention, must be 1 * 10
13Below Ω/, preferred 1 * 10
11Below Ω/, more preferably 1 * 10
10Below Ω/.In addition, the resistance value that the surface is intrinsic, the normally above value of 0 Ω/.
If the electrostatic prevention interfere with layer has enough hardness, when the most surperficial exposing, can play performance as the protective seam of laminated polarizing film.That is, if according to the standard of JIS K 5600-5-4, the pencil hardness during heavy burden 500g more than the preferred H, can be given the performance as sealer on the electrostatic prevention interfere with layer more than F.
On the other hand, the electrostatic prevention interfere with layer when being dispersed in the resin, can be given cementability on the resin.That is,, constitute in the intermembranous lamination of laminated polarizing film, can be used as adhesive layer and use if give electrostatic prevention interfere with layer cementability.Cementability can be a pressure-sensitive adhesive.So-called pressure-sensitive adhesive is also referred to as cementability, is the cementability that expression can be peeled off again.
The reflection type polarizing film that uses among the present invention be to see through certain polarized light, and reflection has the film of the polarized light of opposite nature with it.In the reflection type polarizing film, exist to have to have the reflection-type linear polarization film of polarized light separating property and the reflection-type circularly polarized light film that has the polarized light separating property for circularly polarized light for rectilinearly polarized light.
Reflection-type linear polarization film is the rectilinearly polarized light that sees through the certain vibration direction, the film of the rectilinearly polarized light of the direction of vibration of reflection and its quadrature.The polarisation of so-called reflection-type linear polarization film sees through axle, the direction of the rectilinearly polarized light that is meant specific direction transmitance maximum when the vertical direction of this light polarizing film is injected, and so-called polarisation axis of reflection is meant the direction with its quadrature.
On the other hand, reflection-type rotatory polarization film is the circularly polarized light that sees through certain sense of rotation, and the film of the circularly polarized light of reflection and the rotation of its reverse direction.Use under the situation of the reflection-type circularly polarized light film among the present invention, the preferred film by lamination 1/4 wavelength phase differential, transmitted light is from arriving the light polarizing film of absorption-type light polarizing film after circularly polarized light is converted to rectilinearly polarized light.
As reflection-type linear polarization film, for example can enumerate the reflectivity that utilizes the polarized light component by Brewster angle difference reflection type polarizing film (for example, put down in writing in the Te Biaoping 6-508449 communique), the reflection type polarizing film of implementing fine wire-like Butut (for example, put down in writing in the Te Kaiping 2-308106 communique), with at least 2 kinds of polymeric membrane laminations, utilize since the anisotropic reflection type polarizing film of the anisotropic reflectivity of refractive index (for example, put down in writing in the Te Biaoping 9-506837 communique, as commercially available commodity, the commodity " DBEF " by name of Minnesotsa Mining and Manufacturing society (3M society) system etc., be somebody's turn to do " DBEF ", can obtain from Sumitomo 3M Co., Ltd. in Japan), has the island structure that forms by 2 kinds of macromolecules at least in this polymeric membrane, utilize since the anisotropic reflection type polarizing film of the anisotropic reflectivity of refractive index (for example, United States Patent (USP) the 5th, 825, put down in writing in No. 543 instructionss, example as commercially available product, trade name " DRPF " of above-mentioned 3M society system etc., be somebody's turn to do " DRPF ", also can obtain in Japan) from Sumitomo 3M Co., Ltd., with microparticulate in polymeric membrane, utilize since the anisotropic reflection type polarizing film of the anisotropic reflectivity of refractive index (for example, put down in writing in the Te Biaoping 11-509014 communique), inorganic particles is dispersed in the polymeric membrane, utilization is based on because the anisotropic reflection type polarizing film of the reflectivity that the scattering of particle size can differ from (for example, spy open put down in writing in the flat 9-297204 communique) etc.
On the other hand, as reflection-type rotatory polarization film, for example can enumerate, utilize cholesteric crystal the selective reflecting characteristic reflection type polarizing film [for example, put down in writing in the Te Kaiping 3-45906 communique, as the example of commercially available product, have Merk society system trade name "
" or the trade name of Nitto Denko Corp's system be "
" etc.] etc.
The thickness of reflection type polarizing film has no particular limits, when in liquid crystal display cells etc., using laminated polarizing film of the present invention, and thin good of reflection type polarizing film.Specifically below 1mm, and preferred 0.2mm is following.Herein, the utilization of at least 2 kinds of polymeric membranes of lamination is because the anisotropic reflection-type linear polarization film of the anisotropic reflectivity of refractive index, in polymeric membrane, has the island structure that constitutes by at least 2 kinds of macromolecules, utilize because the anisotropic reflection-type linear polarization of the anisotropic reflectivity of refractive index film, in addition, utilize because the reflection-type rotatory polarization film of the selection reflection characteristic of cholesteric crystal is owing to the thickness attenuation that can make laminated polarizing film of the present invention, therefore good especially.
The absorption-type light polarizing film of using among so-called the present invention is the rectilinearly polarized light that sees through the certain vibration direction, the film of the rectilinearly polarized light of absorption and its orthogonal directions.The polarisation of so-called absorption-type light polarizing film sees through axle, the rectilinearly polarized light that is meant the certain vibration direction when the vertical direction of light polarizing film is injected, the direction of transmitance maximum.
As such absorption-type light polarizing film, for example can use known iodine series light polarizing film or series dye light polarizing film.So-called iodine series light polarizing film, be as the polariscope of the iodine coordination compound of bitintability pigment film with absorption in the polyvinyl alcohol film that stretches as matrix, so-called series dye light polarizing film is as the polariscope of the bitintability dyestuff of the bitintability pigment film as matrix with absorption in the polyvinyl alcohol film that stretches.This absorption-type light polarizing film, in order to improve durability, preferably its single face or two sides are covered by resin molding.Coated with resin material as protection can use cellulose diacetate or Triafol T, polyethylene terephthalate, annular ethylene series resin etc.
The thickness of absorption-type light polarizing film is not particularly limited, but when using laminated polarizing film of the present invention in the liquid crystal display cells etc., thin good of absorption-type light polarizing film.Particularly, below 1mm, further preferably below 0.2mm.
In the laminated polarizing film of the present invention, can also be at any position lamination optical compensation films.So-called optical compensation films is meant in liquid crystal indicator, and colorimetric compensation or visual angle expansion etc. are for improving the film that image quality uses.For example can enumerate, with polycarbonate-based resin, cyclic polyolefin hydrocarbon system resin, polysulfones is a resin, the polyaryl ester is a resin, or the cellulose-based resin single shaft of cellulose diacetate or cellulose triacetate class or Biaxially stretched phase retardation film (for example, Sumitomo Chemical altogether the commodity of Industrial Co., Ltd by name "
" or on cellulose triacetate oriented liquid crystallinity compound phase retardation film (for example, the trade name " WV film " of photographic roll film Co., Ltd. of Fuji system or, the trade name of Shin Nihon Oil Co., Ltd's system " LC film " or " NH film ") etc.In addition, this optical compensation films usually, is at the outside of absorption-type light polarizing film lamination, for example, for realizing improving the purpose of reflection type polarizing film characteristic, can be lamination between light polarizing film and the absorption-type light polarizing film in reflection perhaps in the outside of reflection type polarizing film.
In the laminated polarizing film among the present invention, can be at any position lamination diffusing layer.So-called diffusing layer is meant at the inner uneven texture that keeps refractive index of layer, the therefore layer with scattered beam characteristic.Can use known technology in the diffusing layer, for example can enumerate the layer of disperse particles in any thermoplastic resin, heat-curing resin, light-cured resin, the layer of disperse particles etc. in pressure-sensitive adhesive.As other example, can enumerate index modulation type diffuser that forms by refractive index is different more than 2 kinds photocurable compound or Thermocurable compound etc.
When constituting the film of these laminated polarizing films of the present invention or laminated integratedization layer, preferably use tackifier as required, and bonded laminates.For example, if electrostatic prevention interfere with layer (23) is have self stability membranaceous,, preferably film and the layer that constitutes sticked with glue agent (24) bonded laminates as Fig. 2 (a) or (b) shown in the profile schema diagram.Electrostatic prevention interfere with layer (23) directly when reflection type polarizing film (21) or the last formation of absorption-type light polarizing film (22),, preferably will constitute film or interlayer and stick with glue agent (24) bonded laminates as required shown in the profile schema diagram as Fig. 3 (a)～(c).
Tackifier is if water whitely just be not particularly limited.For example can use hot melt adhesive such as ethylene/vinyl acetate multipolymer or; polyvinyl alcohol resin is dissolved in water system tackifier in the water; the solvent that polyacrylate or polyester based resin are dissolved in the solvent is a tackifier; with the compound with acryloyl group is the light-cured type tackifier of major component; by two liquid response type tackifier with curing reactions such as epoxy compound and amine, moisture-curable tackifier such as cyanoacrylate etc.
In addition, pressure-sensitive adhesive is a kind of preferred tackifier.So-called pressure-sensitive adhesive as long as push the surface that just is bonded in other material, when being peeled off by bonding plane, as long as by sicker the just viscoelastic body removed of trace slash hardly of intensity is arranged, is also referred to as tackifier with it.As pressure-sensitive adhesive, can use the acrylic acid series pressure-sensitive adhesive, vinyl chloride pressure-sensitive adhesive, synthetic rubber series pressure-sensitive adhesive, natural rubber series pressure-sensitive adhesive, silicone-based pressure-sensitive adhesive etc.
In these tackifier, the acrylic acid series pressure-sensitive adhesive is considered from operability or permanance viewpoint, is a kind of preferred tackifier.The acrylic acid series pressure-sensitive adhesive; it is main monomer composition with the low vitrification point of giving cementability; give the comonomer composition of the high vitrification point of tackiness or cohesive force, and the monomer component that contains the functional group who is useful on the improvement of crosslinked or tackiness is that main multipolymer forms.As the main monomer composition, for example can enumerate ethyl acrylate, butyl acrylate, acrylic acid pentyl ester, 2-EHA, 2-ethyl hexyl acrylate, cyclohexyl acrylate, acrylic acid benzyl ester class alkyl acrylate or; Butyl methacrylate, methacrylic acid pentyl ester, methacrylic acid 2-Octyl Nitrite, 2-Propenoic acid, 2-methyl-, octyl ester, cyclohexyl methacrylate, methacrylic acid benzyl ester class alkyl methacrylate etc.As the comonomer composition, can enumerate methyl acrylate, methyl methacrylate, Jia Jibingxisuanyizhi, vinyl acetate, styrene, vinyl cyanide etc.As the monomer component that contains the functional group, can enumerate the monomer that for example acrylic acid, methacrylic acid, maleic acid, itaconic acid class contain carboxyl; Or (methyl) acrylic acid 2-hydroxy methacrylate, (methyl) acrylic acid 2-hydroxy propyl ester, N-methylol-acrylic amide contain the monomer of hydroxyl; Acrylamide, Methacrylamide, glycidyl methacrylate etc.
Pressure-sensitive adhesive, preferred cross-linking type.At this moment, can use and for example add the epoxy based compound, isocyanate compound, metal chelating compound, metal alkyl alkoxide, slaine, amines, hydrazine hydrate compound, various crosslinking chemicals of aldehyde based compound class and crosslinked method, irradiation radioactive ray and crosslinked method can be selected aptly according to functional group's kind.And, constitute the weight-average molecular weight of the host polymer of pressure-sensitive adhesive, be preferably about 600,000～2,000,000 more preferably 800,000～1,800,000.If weight-average molecular weight less than 600,000, the addition of plastifier described later are for a long time, pressure-sensitive adhesive is to just being reduced by adaptation on the sicker or permanance.In addition, if weight-average molecular weight surpasses 2,000,000, particularly the amount of plastifier after a little while, the elasticity of pressure-sensitive adhesive uprises flexibility and reduces, and when being produced differential contraction stress by sticky object, it can not be absorbed, and is lax.
The preferred plastifier that cooperates in the pressure-sensitive adhesive.As plastifier, can enumerate for example phthalic ester, the trimesic acid ester, the pyromellitic acid ester, adipate, sebacate, phosphotriester, glyceride type ester class, or industry oil (プ ロ セ ス オ イ Le), liquid polyethers, liquid polyterpene, other liquid resin etc., wherein a kind of independent or mixing use more than 2 kinds.And in the pressure-sensitive adhesive, as required, can cooperate for example ultraviolet light absorber or light stabilizer, various adjuvants such as antioxidant.
According to laminated polarizing film of the present invention, can become that to make its absorption-type light polarizing film side be to penetrate the polarizing light source device of exiting surface.In addition, can show in the configuration of the absorption-type light polarizing film side in this polarizing light source device and use liquid crystal cells, become liquid crystal indicator.For this polarizing light source device and liquid crystal indicator, illustrate by the cut-open view among Fig. 4 and Fig. 5.
In Fig. 4 and example shown in Figure 5, with identical shown in (a) of Fig. 1, with absorption-type light polarizing film 22/ electrostatic prevention interfere with layer 23/ reflection type polarizing film 21 side of the reflection type polarizing film 21 of the laminated polarizing film 10 of lamination successively, configuration light supply apparatus 61 or 62 constitutes polarizing light source device 64 and 65.
Light supply apparatus 61 among Fig. 4, owing to be called side-light type, possesses light source 51, light guide plate 52 and at the reflecting plate 53 of light guide plate back side configuration from the light that the light source 51 of the side configuration of light guide plate 52 comes out, is capped not towards catoptron 54 reflections of light guide plate 52 sides of light source 51, at first enter in the light guide plate 52, along with advancing therein, combine by reflection with reflecting plate 53, can emit uniform light from the front face side of light guide plate 52.This light supply apparatus 61 makes the absorption-type light polarizing film 22 of laminated polarizing film 10 become the outside and dispose formation polarizing light source device 64.And, absorption-type light polarizing film 22 sides of laminated polarizing film 10 with respect to the configuration of the back side of liquid crystal cells 30, the front face side configuration absorption-type light polarizing film 41 of liquid crystal cells 30 constitutes liquid crystal indicator 67.
On the other hand, the light supply apparatus 62 among Fig. 5 owing to be called direct-type, constitutes by light source 51 with the reflecting plate 53 of its back side configuration, uses the light that directly shoots out from light source 51 and reflected light two aspects illumination by reflecting plate 53 reflections.This light supply apparatus 62, the absorption-type light polarizing film 22 that makes laminated polarizing film 10 constitutes polarizing light source device 65 in outside configuration.And absorption-type light polarizing film 22 sides of this laminated polarizing film 10 are with respect to the back side configuration of liquid crystal cells 30, and liquid crystal cells 30 front face side dispose front face side absorption-type light polarizing film 41, constitute liquid crystal indicator 68.
Therefore, according to polarizing light source device of the present invention, corresponding to Fig. 1, the illustrative laminated polarizing film 10 of Fig. 2 and Fig. 3 is penetrated exiting surface for absorption-type light polarizing film 22 is become, and has disposed light supply apparatus 61 or 62.Light supply apparatus possesses light source part and reflecting plate herein, the illustrated so-called side-light type light supply apparatus of Fig. 4, and the illustrated so-called direct-type light supply apparatus of Fig. 5 all can use.Under the situation of side-light type as shown in Figure 4, light source 51 constitutes light source part with light guide plate 52.In the light supply apparatus, as required, can dispose diffusion sheet or lens in addition in its outgoing plane side.Particularly in side-light type, also be extensive use of diffusion sheet or lens in the conventional lighting sources device, polarizing light source device according to the present invention is same, can dispose wherein one or both.
Fig. 4 and polarizing light source device shown in Figure 5 are to liquid crystal indicator, and the light source 51 that uses in the light supply apparatus 61 or 62 is not particularly limited, and can be known adopting at polarizing light source device or liquid crystal indicator, can use equally among the present invention.As suitable light source 51, for example can enumerate cold-cathode tube, light emitting diode, inorganic or organic electroluminescent (EL) lamp etc. particularly.
The outgoing plane lateral root of light supply apparatus is the sheet that the incident light scattering is seen through according to the diffusion sheet of needs configurations, whole light penetrations more than 60% normally, the optical element of smog rate (ヘ イ ズ) more than 10%.Herein, whole light penetrations of diffusion sheet, high more good more, show that whole light penetrations are more preferably more than 80%.As this class diffusion sheet, be not particularly limited, for example can use diffusion sheet, or be added on inner plastic sheet or the glass plate that forms the particulate in cavity plastic sheet or the processing of glass plate asperities.The plastic sheet material is not particularly limited herein, can use for example as thermoplastic resin or the illustrative resin of heat-curing resin.
At the outgoing plane lateral root of light supply apparatus lens according to the needs configuration, compile the light that sends from light source, equally also can use the known lens that in polarizing light source device or liquid crystal indicator, adopts.As this lens, for example can enumerate and on plastic sheet, to form fine a plurality of prisms, be paved with the lenslet column of convex lens or concave mirror etc.
According to liquid crystal indicator of the present invention, illustrated as Fig. 4 or Fig. 5, be side at the outgoing plane laminated polarizing film 10 of polarizing light source device 64 or 65, dispose the device of liquid crystal cells 30 and front face side absorption-type light polarizing film 41 successively.Herein, between liquid crystal cells 30 and the front face side absorption-type light polarizing film 41, as required, can dispose one or more optical compensation films, in addition as required, the leading flank of liquid crystal cells 30 can dispose light diffusion layer, and, can dispose optical compensation films and light diffusion layer.Constitute each parts of liquid crystal indicator, each parts particularly from laminated polarizing film 10 to front face side absorption-type light polarizing film 41, preferred adjacent has 1 pair at least by the gluing lamination of pressure-sensitive adhesive, and more preferably adjacent whole accessories are equal parts by the gluing lamination of pressure-sensitive adhesive each other.
The liquid crystal cells 30 that uses in the liquid crystal indicator in order to change through light quantity, is enclosed liquid crystal between two pieces of substrates, has by applying the performance that voltage changes the liquid crystal aligning state.2 pieces of substrate inboards, dispose rear side transparency electrode 31 and front face side transparency electrode 32 respectively, the clamping liquid crystal layer 33 betwixt.Diagram has been omitted, but except that liquid crystal cells 30, is used to make the oriented film of liquid crystal layer 33 orientations, if colored demonstration also has color filter one deck.Among the present invention, the kind or its type of drive that constitute the liquid crystal of liquid crystal cells 30 are not particularly limited, can use the known friendship of turning round to turn round friendship to being listed as (STN) liquid crystal etc. to being listed as (TN) liquid crystal or surpassing, in addition, thin film transistor (TFT) (TFT) type of drive, vertical orientation (VA) mode, coplane electric field driven mode, all modes that optical compensation bend pipe polarized lights such as (OCB) shows are all applicable to the present invention.Wherein, the liquid crystal cells of coplane electric field driven mode (transverse field type liquid crystal cells) is effective owing to be subjected to the influence of static easily so use laminated polarizing film of the present invention.
For front face side absorption-type light polarizing film 41, can use and the identical light polarizing film of front as the example explanation of the absorption-type light polarizing film that constitutes laminated polarizing film of the present invention.And, can insert optical compensation films as required between liquid crystal cells 30 and the front face side absorption-type light polarizing film 41.At this moment, the optical characteristics of optical compensation films is for the liquid crystal characteristic that is fit to the liquid crystal cells use is selected.The optical compensation films of this moment is because by getting involved the loss that air layer prevents light, so preferably integrated by pressure-sensitive adhesive and adjacent film, layer or liquid crystal cells lamination.And, can the lamination light diffusion layer between front face side absorption-type light polarizing film 41 and the liquid crystal cells 30, can use and the front as the identical diffusion layer of the example explanation of the light diffusion layer that constitutes laminated polarizing film.
Embodiment
Below, disclose the specific embodiment of the present invention with embodiment, but the present invention does not limit to some extent because of these embodiment.Film that uses among the embodiment and various material are as follows.
(1) reflection type polarizing film
Trade name " DBEF ": what 3M Co., Ltd. in Sumitomo sold improves film by multilayer laminated film formed brightness.This film can see through the rectilinearly polarized light of certain direction, the rectilinearly polarized light of reflection and its orthogonal directions.The surperficial intrinsic resistance value of this film with Mitsubishi chemical Co., Ltd's system "
(Ha イ レ ) UP MCP-HT450 ", measure under 10 seconds the condition applying voltage 1000V, time, the result surpasses the higher limit that can measure.The higher limit that can measure of this device is 10
15Ω/.
(2) absorption-type light polarizing film
Trade name "
SRW862A ": the absorption-type light polarizing film that Sumitomo Chemical Company Ltd sells is the structure that the directed two sides of flooding the polariscope of iodine on the polyvinyl alcohol film of uniaxial orientation is covered with Triafol T.This film can absorb the rectilinearly polarized light with its orthogonal directions through the rectilinearly polarized light of certain direction.The surperficial intrinsic resistance value of this film is applying voltage 1000V, and the time is to measure under 10 seconds the condition, and the result is 8.1 * 10
14Ω/.
Trade name "
SRW862A-NSC ": the absorption-type light polarizing film that Sumitomo Chemical Company Ltd sells, be trade name "
SRW862A " single side face on disperse the electrostatic prevention agent interfering to form the light polarizing film of the curing tunicle of light-cured resin.The surperficial intrinsic resistance value of this electrostatic prevention interfere with layer is applying voltage 500V, and the time is to measure under 10 seconds the condition, and the result is 4.6 * 10
12Ω/.
(3) electrostatic prevention agent interfering
Trialkyl-2-hydroxyethyl ammonium salt is dissolved in pentaerythrite and the alcohol mixed solvent and uses.
(4) pressure-sensitive adhesive
No. 7, the pressure-sensitive adhesive that uses in the blooming that uses Sumitomo Chemical Company Ltd to sell (for example, with the absorption-type light polarizing film of one-sided pressure-sensitive adhesive, trade name "
(
) SRW862AP7 " grade of symbol " 7 " expression pressure-sensitive adhesive at end).This pressure-sensitive adhesive is the acrylic acid series pressure-sensitive adhesive.
On the single face of reflection type polarizing film " DBEF ", apply electrostatic prevention agent interfering trialkyl-2-hydroxyethyl ammonium salt solution equably, air-dry and volatilization removes desolvates, and makes the reflection type polarizing film with electrostatic prevention agent interfering layer.The surperficial intrinsic resistance value of electrostatic prevention interfere with layer is applying voltage 500V, and the time is to measure under 10 seconds the condition, and the result is 2.4 * 10
9Ω/.Do not form on the one side of electrostatic prevention interfere with layer, No. 7 lamination absorption-type of usefulness pressure-sensitive adhesive light polarizing film "
(
) SRW862A ", make laminated polarizing film.On the electrostatic prevention interfere with layer of this laminated polarizing film, stick on the commercially available diaphragm of adhesive coating on the single side face of polyethylene terephthalate film, make laminated polarizing film with diaphragm.Further, No. 7, the coating pressure-sensitive adhesive on the face of the absorption-type light polarizing film side of the laminated polarizing film of diaphragm, and face is pasted the film formed commercially available molding film of polyethylene terephthalate from it.
This single face diaphragm/another side peeled off with the molding film of the laminated polarizing film of pressure-sensitive adhesive remove, utilize the pressure-sensitive adhesive that exposes, paste with glass plate.Then, diaphragm is peeled with hand, measures (A) that produce this moment: peel off static voltage on the laminated polarizing film, (B): the glass plate side peel off static voltage.The results are shown in table 1.Peel off static and force down, the influence of static is little, will be configured on the side formula light supply apparatus at the laminated polarizing film of pasting on this glass plate, makes glass plate side configuration in the above, makes polarizing light source device.On this polarizing light source device, with the absorption-type light polarizing film "
(
) SRW862A " place with the darkest visible configuration of polarizing light source device, under this state, the visualization polarizing light source device especially fails to observe bright spot.
Embodiment 2
The absorption-type light polarizing film "
(
) SRW862A " and single side face on, evenly apply electrostatic prevention agent interfering trialkyl-2-hydroxyethyl ammonium salt solution, air-dry and volatilization removes desolvates, and makes the absorption-type light polarizing film with electrostatic prevention agent interfering layer.The surperficial intrinsic resistance value of electrostatic prevention interfere with layer is applying voltage 500V, and the time is to measure under 10 seconds the condition, and the result is 6.0 * 10
9Ω/.Go up with pressure-sensitive adhesive at reflection type polarizing film " DBEF " and to paste for No. 7, and, will disturb aspect as the face of stickup lamination with the electrostatic prevention of the absorption-type light polarizing film of electrostatic prevention interfere with layer, the making laminated polarizing film.On the reflection type polarizing film of this laminated polarizing film, stick on the commercially available diaphragm of adhesive coating on the single side face of polyethylene terephthalate film, make laminated polarizing film with diaphragm.Further; by operation similarly to Example 1; make the laminated polarizing film of single side face diaphragm/another side with pressure-sensitive adhesive; after pasting on the glass plate; peel off diaphragm with hand; measure (A) that produce this moment: peel off static voltage on the laminated polarizing film, (B): the glass plate side peel off static voltage.The results are shown in the table 1.Peel off static and force down, the influence of static is little.Use sticks on the laminated polarizing film on the glass plate, by operation similarly to Example 1, makes polarizing light source device, and bright spot is not especially observed in visualization.
Embodiment 3
The absorption-type light polarizing film that preparation electrostatic prevention interfere with layer forms on single side face "
(
) SRW862A-NSC "." the 5th one of the ordinary test method one of coating: engineering properties 1 the 4th joint of filming: the regulation evaluation of scratch hardness (pencil method) is 2H to the hardness of the electrostatic prevention interfere with layer of this film according to JISK 5600-5-4.Go up the stickup pressure-sensitive adhesive No. 7 at reflection type polarizing film " DBEF ", further, disturb aspect as the face of stickup lamination, make laminated polarizing film with electrostatic prevention with electrostatic prevention interfere with layer absorption-type light polarizing film.On the reflection type polarizing film of this laminated polarizing film, stick on the commercially available diaphragm of adhesive coating on the single side face of polyethylene terephthalate film, make laminated polarizing film with diaphragm.Further; by operation similarly to Example 1; make the laminated polarizing film of single side face diaphragm/another side with pressure-sensitive adhesive; after sticking on the glass plate; diaphragm is peeled off with hand; measure (A) that produce this moment: peel off static voltage on the laminated polarizing film, (B): the glass plate side peel off static voltage.The results are shown in the table 1.Peel off static and force down, the influence of static is little.Use sticks on the laminated polarizing film on the glass plate, by operation similarly to Example 1, makes polarizing light source device, and bright spot is not especially observed in visualization.
Comparative example 1
With reflection type polarizing film " DBEF ", No. 7, pressure-sensitive adhesive, the absorption-type light polarizing film "
(
) SRW862A " lamination successively, make laminated polarizing film.On the reflection type polarizing film of this laminated polarizing film, stick on the commercially available diaphragm of adhesive coating on the single side face of polyethylene terephthalate film, make laminated polarizing film with diaphragm.Further; by operation similarly to Example 1; make the laminated polarizing film of single side face diaphragm/another side with pressure-sensitive adhesive; after sticking on the glass plate; diaphragm is peeled off with hand; measure the static voltage of peeling off on (A) laminated polarizing film that produces this moment, (B) the glass plate side peels off static voltage.The results are shown in the table 1.Peel off the static voltage height, produce static.The laminated polarizing film that use is pasted on this glass plate by operation similarly to Example 1, is made polarizing light source device, and bright spot is not especially observed in visualization.
Comparative example 2
Paste reflection type polarizing film " DBEF ", pressure-sensitive adhesive No. 7, and, with use among the embodiment 3 identical, with not forming face with the electrostatic prevention interfere with layer of the absorption-type light polarizing film of electrostatic prevention interfere with layer, make laminated polarizing film as the face of stickup lamination.That is, at this moment, the electrostatic prevention interfere with layer forms in the outside of the absorption-type light polarizing film that constitutes laminated polarizing film.On the reflection type polarizing film of this laminated polarizing film, stick on the commercially available diaphragm of adhesive coating on the single side face of polyethylene terephthalate film, make laminated polarizing film with diaphragm.Further, No. 7, the coating pressure-sensitive adhesive on the electrostatic prevention interfere with layer, and face by pasting the film formed commercially available stripping molding film of polyethylene terephthalate, is made the laminated polarizing film of single side face diaphragm/another side with pressure-sensitive adhesive from it.After sticking on the glass plate,, peel off diaphragm, measure (A) that produce this moment with hand by operation similarly to Example 1: peel off static voltage on the laminated polarizing film, (B): the glass plate side peel off static voltage.The results are shown in the table 1.Peel off static and force down, the generation of static is suppressed.The laminated polarizing film that use is pasted on this glass plate by operation similarly to Example 1, is made polarizing light source device, and visualization is observed and is considered to the bright spot that the electrostatic prevention interfere with layer causes.
Table 1
Laminated polarizing film of the present invention, owing to have the electrostatic prevention jamming performance, for example the generation of static electricity when peeling off diaphragm is few.In addition, because the influence of shortcoming to showing that does not have the electrostatic prevention interfere with layer to cause can be kept superior display quality.
Claims (9)
1. laminated polarizing film, be the reflection type polarizing film and the absorption-type light polarizing film lamination that will have the polarized light separating property, further with the electrostatic prevention interfere with layer at the outside of reflection type polarizing film or at least any one party lamination between reflection type polarizing film and the absorption-type light polarizing film.
2. laminated polarizing film according to claim 1, wherein, the electrostatic prevention interfere with layer is directly to form on reflection type polarizing film or absorption-type light polarizing film.
3. laminated polarizing film according to claim 1 and 2, wherein, the electrostatic prevention interfere with layer is that the electrostatic prevention agent interfering is filmed.
4. laminated polarizing film according to claim 1 and 2, wherein, the electrostatic prevention interfere with layer is the above membranous body of pencil hardness F.
5. laminated polarizing film according to claim 1, wherein, the electrostatic prevention interfere with layer has the cementability that comprises pressure-sensitive adhesive.
6. laminated polarizing film according to claim 1, wherein, in the outside of absorption-type light polarizing film, further lamination optical compensation films.
7. a polarizing light source device disposes the described laminated polarizing film of claim 1, light source part and reflecting plate successively.
8. liquid crystal indicator, in the front of the described polarizing light source device of claim 7, lamination liquid crystal cells and absorption-type light polarizing film successively.
9. liquid crystal indicator according to claim 8, wherein, liquid crystal cells is the transverse field type liquid crystal cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031084508A CN100439949C (en) | 2003-03-31 | 2003-03-31 | Laminated polarizing film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031084508A CN100439949C (en) | 2003-03-31 | 2003-03-31 | Laminated polarizing film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1534318A CN1534318A (en) | 2004-10-06 |
| CN100439949C true CN100439949C (en) | 2008-12-03 |
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ID=34283124
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031084508A Expired - Fee Related CN100439949C (en) | 2003-03-31 | 2003-03-31 | Laminated polarizing film |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200706933A (en) * | 2005-08-01 | 2007-02-16 | Dongwoo Fine Chem Co Ltd | Manufacturing method of polarizing plate |
| KR100926222B1 (en) * | 2007-12-28 | 2009-11-09 | 제일모직주식회사 | Polarizing film comprising the antistatic coating layer |
| JP5607673B2 (en) | 2012-03-09 | 2014-10-15 | 日東電工株式会社 | Optical display device |
| CN107656389B (en) * | 2012-03-30 | 2021-07-06 | 日东电工株式会社 | Method for manufacturing liquid crystal display device |
| JP5952985B1 (en) * | 2015-07-17 | 2016-07-13 | リンテック株式会社 | Surface protective film, capacitive touch panel, and image display device |
| CN110161687A (en) * | 2018-02-12 | 2019-08-23 | 杭州太若科技有限公司 | AR display device and wearable AR equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6111697A (en) * | 1998-01-13 | 2000-08-29 | 3M Innovative Properties Company | Optical device with a dichroic polarizer and a multilayer optical film |
| CN1395741A (en) * | 2000-09-21 | 2003-02-05 | 皇家菲利浦电子有限公司 | Reflective polarizer for display device |
| US20030058391A1 (en) * | 2001-09-26 | 2003-03-27 | Nitto Denko Corporation | Semi-transmitting reflective plate, reflective plate, semi-transmitting polarizer, reflective polarizer and liquid crystal display using same |
-
2003
- 2003-03-31 CN CNB031084508A patent/CN100439949C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6111697A (en) * | 1998-01-13 | 2000-08-29 | 3M Innovative Properties Company | Optical device with a dichroic polarizer and a multilayer optical film |
| CN1395741A (en) * | 2000-09-21 | 2003-02-05 | 皇家菲利浦电子有限公司 | Reflective polarizer for display device |
| US20030058391A1 (en) * | 2001-09-26 | 2003-03-27 | Nitto Denko Corporation | Semi-transmitting reflective plate, reflective plate, semi-transmitting polarizer, reflective polarizer and liquid crystal display using same |
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| Publication number | Publication date |
|---|---|
| CN1534318A (en) | 2004-10-06 |
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