WO2007119592A1 - 光フィルター - Google Patents
光フィルター Download PDFInfo
- Publication number
- WO2007119592A1 WO2007119592A1 PCT/JP2007/056973 JP2007056973W WO2007119592A1 WO 2007119592 A1 WO2007119592 A1 WO 2007119592A1 JP 2007056973 W JP2007056973 W JP 2007056973W WO 2007119592 A1 WO2007119592 A1 WO 2007119592A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical filter
- particles
- polyamide
- filter according
- liquid crystal
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3008—Polarising elements comprising dielectric particles, e.g. birefringent crystals embedded in a matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/288—Filters employing polarising elements, e.g. Lyot or Solc filters
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
Definitions
- the present invention relates to an optical filter that converts polarized light into non-polarized light. More specifically, the present invention emits light by attaching it to a liquid crystal display device such as a liquid crystal television, a liquid crystal display of a computer or a mobile phone.
- the present invention relates to an optical filter that can convert linearly polarized light into non-polarized light that is close to natural light with high efficiency.
- liquid crystal display devices have thin, lightweight, and high image quality characteristics, and have become a display device that can compete with CRT, and multi-color, high-definition liquid crystal displays and the like have been promoted.
- noisy projection video display devices using liquid crystal projectors are becoming popular.
- TFT, MIM, STN, TN, etc. driving principles for these liquid crystal display devices, but each method uses a set of polarizing plates to emit display light as linearly polarized light. Therefore, the light reaching the observer becomes linearly polarized light! /
- a polarizing filter or polarizing glasses is used as a technique for reducing eye strain caused by long-term use of a liquid crystal display.
- the purpose of this polarizing filter and polarizing glasses is to block the incident light from the polarization component perpendicular to the transmission axis of the polarizer and to accept only the incident light from the polarization component parallel to the transmission axis of the polarizer. Yes.
- the light emitted from the liquid crystal screen of mobile phones and computers is linearly polarized light, so if the angle of the polarizing filter or polarizing glasses is tilted, the amount of light will be significantly reduced. It became different from the left and right, which was very inconvenient.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-185821
- Patent Document 2 Japanese Patent Laid-Open No. 10-10522
- Patent Document 3 Japanese Patent Laid-Open No. 6-308496
- An object of the present invention is to solve the above problems and to provide an optical filter (polarization elimination filter) capable of converting polarized light into non-polarized light that is close to natural light with high efficiency.
- optical filter polarization elimination filter
- the present invention relates to the following items. [0009] 1. An optical filter comprising a crystalline polymer having a spherulite structure.
- V Light filter as described in somewhere.
- optical filter as described in any one of 2 to 12 above, which also has a particle force and a polyamide force.
- a liquid crystal display device including a light source device, a rear polarizing plate, a liquid crystal cell, and a front polarizing plate,
- a liquid crystal display device comprising the optical filter according to any one of items 1 to 13.
- the optical filter 1 of the present invention can convert polarized light close to natural light and non-polarized light with high efficiency. Therefore, by attaching it to a liquid crystal display device such as a liquid crystal television, computer or mobile phone liquid crystal display, the linearly polarized light emitted from it can be converted to non-polarized light, eliminating the dark field even when using polarizing filters or polarizing glasses. Can do. In addition, even when used alone, it can gently disperse the light, thus reducing eye strain.
- a liquid crystal display device such as a liquid crystal television, computer or mobile phone liquid crystal display
- the light component emitted from the light source device may include a polarization component
- the brightness can be effectively extracted by mounting the light component between the light source device and the rear polarizing plate.
- FIG. 1 is a scanning electron micrograph of porous particles used in Example 1.
- FIG. 2 is a scanning electron micrograph of the cross section of the porous particles used in Example 1.
- FIG. 3 is a transmission electron micrograph of the cross section of the porous particles used in Example 1.
- FIG. 4 is a scanning electron micrograph of true spherical particles used in Comparative Example 1.
- FIG. 4 is a scanning electron micrograph of true spherical particles used in Comparative Example 1.
- FIG. 5 is a transmission electron micrograph of a cross section of a true spherical particle used in Comparative Example 1.
- FIG. 6 is a graph showing the wavelength dependence of the transmittance when the orientation axes of the polarizing film used for evaluating the depolarizing ability are arranged at right angles.
- FIG. 7 shows the results of evaluating the depolarization ability of the optical filters produced in Example 1 and Comparative Example 1 (Example 2 and Comparative Example 2), respectively, and is a graph showing the wavelength dependence of transmittance.
- FIG. 8 is a graph showing the depolarizing ability evaluation result of the optical filter produced in Example 4 (Example 5), which shows the wavelength dependence of transmittance.
- the optical filter according to the present invention includes a crystalline polymer having a spherulite structure.
- the particle force of a crystalline polymer having a spherulite structure may be configured, or a film having a crystalline polymer force having a spherulite structure may be used.
- it is a particle of a crystalline polymer, and the single particle itself has a spherulitic structure and includes such particles. .
- These particles preferably have a number average particle size of 1 to 30 m, more preferably porous particles, and a BET specific surface area of 0.1 to 80 m 2 Zg.
- the spherulite structure has one or more core force polymer fibrils that are three-dimensionally isotropic! / Is a structure unique to crystalline polymers formed by radiative growth.
- the ⁇ spherulite structure itself '' means that it is a spherulite structure formed by three-dimensional isotropic or radial growth of high molecular fibrils from one or more cores near the center of one single particle. .
- the degree of crystallinity of the particles is preferably 40% or more, and a high molecular material that can be crystallized to such an extent is preferably used.
- the particle production method is not particularly limited as long as it is a method capable of forming fine particles by developing spherulites, such as a method of precipitating particles while developing spherulites from a solution of a polymer material. Can be mentioned. With this method of precipitation from a solution, porous particles can be grown.
- porous particles As the porous particles, polyamide porous particles will be described as an example. However, with respect to the indices representing the physical form of the particles such as the particle shape, particle diameter, specific surface area, and pore diameter described here, other than polyamide It also applies to particles.
- cyclic amide For example, it can be obtained by ring-opening polymerization of cyclic amide or polycondensation of dicarboxylic acid and diamine.
- Monomers include crystalline polyamides obtained by ring-opening polymerization of cyclic amides such as ⁇ -force prolatatam and ⁇ -lauraclatatatam, and amino acids such as ⁇ -aminocaproic acid, ⁇ -aminododecanoic acid, and ⁇ -aminoundecanoic acid.
- dicarboxylic acids and derivatives such as oxalic acid, adipic acid, sebacic acid, terephthalic acid, isophthalic acid, 1,4-cyclohexyldicarboxylic acid, and ethylenediamine, hexamethylenediamine, 1,4-cyclohexane And those obtained by polycondensation of diamines such as xyldiamin, m-xylylenediamine, pentamethylenediamine and decamethylenediamine.
- the polyamide is a polyamide made of a homopolymer or a copolymer thereof, or a derivative thereof. Specifically, polyamide 6, polyamide 66, polyamide 11, polyamide 12, polyamide 610, polyamide 66Z6T (T represents a terephthalic acid component), and the like. Also above May be a blend of polyamides. Particularly preferred are polyamide 6 and polyamide 66.
- the molecular weight of the positive amide is 2,000 to 100,000. Preferably, it is 5,000 to 40,000.
- the polyamide porous particles have a spherical, substantially spherical, slanted ball (C-type) shape, or a force that is a simple substance or a mixture of dumbbell shapes, 70 wt% or more, preferably 80 wt% or more, more preferably 90 wt%
- C-type slanted ball
- the above is desirably a uniform particle composed of various particle shapes. If it is less than 70% by weight, the fluidity as a powder material may be unfavorable.
- the polyamide porous particles have a number average particle diameter of 1 ⁇ m or more, preferably 30 ⁇ m or less. If the number average particle diameter is smaller than 1 ⁇ m, it is difficult to form a spherulite structure, which is not appropriate. In addition, even when the number average particle size is larger than 30 m, there is no problem in terms of the mechanism of depolarization, but there is practically no inconvenience in molding such as smoothing the surface when forming a thin film. It is likely to occur.
- the BET specific surface area of the polyamide porous particles is 0.1 to 80 m 2 Zg. Specific surface area is 0.
- the adhesion may be inferior when dispersed in a transparent resin.
- the specific surface area is larger than 80 m 2 Zg, the handleability of the coating liquid is lowered during the formation of the coating film.
- the average pore diameter of the polyamide porous particles is preferably 0.01 to 0.8 ⁇ m. If the average pore diameter is less than 0.01 m, the adhesion when dispersed in a transparent resin may be poor. Also, it is difficult to handle when the average pore diameter is larger than 0.8 m.
- the porosity index (RI) of the porous polyamide particles is 5 to: LOO is preferred.
- the porosity index (RI) is defined as the ratio of the specific surface area of the porous spherical particles to the specific surface area of the smooth spherical particles having the same diameter. It can be expressed by the following formula. If the porosity index is less than 5, the adhesion when dispersed in a transparent resin may be poor. If the porosity is greater than 100, handling becomes difficult.
- RI S / S 0
- S specific surface area of porous particles [m 2 Zkg]
- the porous polyamide particles are crystalline and have a melting point of 110 to 320 ° C. Preferably, it is 140-280 degreeC. When the melting point is lower than 110 ° C, the thermal stability is lowered.
- the polyamide porous particles used in the present invention preferably have a crystallinity of 0% or more as measured by DSC.
- DSC digital versatile crystals
- the crystallinity of polyamides crystallized from ordinary melts is high, at most about 30%.
- the polyamide used in the present invention preferably has a crystallinity higher than 40%. Low crystallinity is not preferable because the ability to convert linearly polarized light into non-polarized light is reduced.
- the degree of crystallinity of the polyamide 6 was calculated based on the description of R. Vieweg et al., Kunststoffel V polyamide, page 218, Carl Hanger Verlag, 1966, and the heat of fusion of polyamide 6 was 45 calZ g.
- the crystallinity is calculated by the following formula force.
- the polyamide porous particles of the present invention have a ratio of volume average particle diameter (or volume reference average particle diameter) to number average particle diameter (or number reference average particle diameter) in the particle size distribution of 1 to 2.5 is preferred.
- the ratio of the volume average particle diameter to the number average particle diameter (particle size distribution index PDI) is greater than 2.5, handling as a powder becomes poor.
- the particle size distribution index is expressed by the following equation.
- n is the number of measurements.
- Polyamide porous particles can be produced by dissolving polyamide in a good solvent, lowering the solubility of the solution in polyamide, and precipitating the polyamide.
- a preferred method is to use a solvent that dissolves polyamide at high temperatures, which is a non-solvent for polyamide at low temperatures. After dispersing the polyamide in the solvent, the temperature is increased to increase the solubility of the solvent in polyamide. After dissolution, the temperature of the solution is lowered to reduce the solubility of the solvent in the polyamide, so that the polyamide can be deposited by a method.
- Power that is a non-solvent for polyamides at low temperatures examples include polyhydric alcohols and mixtures thereof.
- polyhydric alcohol examples include tylene glycol, 1,2 propanediol, 1,3 propanediol, 1,4-butanediol, glycerin, propylene glycol, dipropylene glycol, 1,5 pentanediol, and hexylene diol.
- an inorganic salt may be added to lower the dissolution temperature.
- the inorganic salt include calcium chloride and lithium chloride. Any inorganic salt may be used as long as it is an inorganic salt that promotes dissolution by acting on the hydrogen bond portion of the polyamide.
- the polyamide solution (A) in which the polyamide is dissolved in a good solvent in which the polyamide is dissolved near room temperature cannot be dissolved in the polyamide solution (A) near the room temperature.
- phenol compound or formic acid is preferable.
- phenol, 0-taresole, m-cresol, p-cresol, talesolic acid, black mouth phenol and the like are preferred as the phenolic compound.
- phenol 0-taresole, m-cresol, p-cresol, talesolic acid, black mouth phenol and the like are preferred as the phenolic compound.
- Phenol is safer to work with less toxicity than other solvents. Also, it can be easily distilled off from the resulting porous fine particles!
- a freezing point depressant may be added to the polyamide solution (A).
- a polyamide non-solvent can be used as long as it does not cause the polyamide in the polyamide solution to precipitate.
- freezing point depressants are water, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1-propanol mono-ole, 2-methinole 2-propanol, 1 pentano mono-ole. 1 hexanol, ethylene glycol, triethylene glycol, propylene glycol, glycerin, and diglycerin.
- an inorganic salt may be added to improve the solubility of the polyamide.
- the inorganic salt include calcium chloride and lithium chloride. If the metal ion is an inorganic salt that acts on the hydrogen bonding part of the polyamide to promote dissolution, the above example You may use what is not restricted to.
- the polyamide concentration in the polyamide solution (A) is preferably in the range of 0.1 to 30% by weight, more preferably in the range of 0.2 to 25% by weight. If the proportion of polyamide in the polyamide solution exceeds 30% by weight, it may be difficult to dissolve or a uniform solution may not be obtained. Further, even if it is dissolved, the viscosity of the solution becomes high, and it becomes difficult to handle, which is not preferable. If the proportion of polyamide is less than 0.1% by weight, the productivity of products with low polymer concentration will be low, which is not preferable.
- the non-solvent (B) at around room temperature of the polyamide of the present invention is preferably one that is at least partially compatible with the good solvent of the polyamide solution (A).
- the non-solvent (B) include compounds selected from the group power consisting of water and a polyamide-insoluble organic solvent.
- the non-solvent (B) may be a mixture of two or more solvents.
- the non-solvent (B) preferably does not dissolve 0.01% by weight or more of the polyamide in the polyamide solution at a liquid temperature of 25 ° C.
- Examples of the polyamide-insoluble organic solvent near room temperature include alkylene glycols such as ethylene glycol and propylene glycol.
- the polyamide-insoluble organic solvent near room temperature include monovalent and trivalent alcohols.
- the monohydric alcohol is preferably a monohydric alcohol having 1 to 6 carbon atoms. It may be linear or branched. Examples of monohydric alcohols are methanol, ethanol, 1 propanol, 2-propanol, 1-butanol, 2-butanol, 2-methyl-1 propanol, 2-methyl-2-propanol, 1 pentanol and 1 hexanol. , Ethylene glycol, triethylene glycol, and polypropylene glycol. An example of a trihydric alcohol is glycerin. Moreover, acetone can be mentioned as a ketone.
- the non-solvent (B) is preferably a mixture containing water and a polyamide-insoluble solvent (preferably a monohydric alcohol).
- a polyamide-insoluble solvent preferably a monohydric alcohol.
- the polyamide is polyamide 12
- it is a mixture containing alkylene glycol and a polyamide-insoluble organic solvent other than alkylene glycol (preferably a trihydric alcohol) in the non-solvent (B).
- porous polyamide fine particles In order to prepare porous polyamide fine particles, a solution (A) and a non-solvent (B) are mixed and mixed. A method of forming a uniform mixed solution from time to time and then allowing it to stand can be used, and this operation precipitates porous polyamide particles.
- the liquid temperature of the mixed solution when depositing the porous polyamide particles is preferably in the range of 0 ° C to 80 ° C, particularly preferably in the range of 20 ° C to 40 ° C.
- the viscosity of the mixed solution may be increased by adding a thickener to the mixed solution of the polyamide solution (A) and the non-solvent (B) of the polyamide for the purpose of preventing aggregation of the precipitated polyamide particles.
- thickeners include polyalkylene glycols having a number average molecular weight of 1000 or more (particularly in the range of 1100 to 5000).
- polyalkylene glycols include polyethylene glycol and polypropylene glycol.
- the thickening agent can be added either by mixing the polyamide solution and the non-solvent (B) at the same time as adding the thickening agent, or by adding the thickening agent to the mixed solution immediately after the adjustment. Even that way. Two or more polyalkylene glycols can be used in combination.
- the order of adding the polyamide solution and the non-solvent is not particularly limited as long as the uniformity of the solution is maintained.
- the prepared polyamide porous fine particles can be solid-liquid separated by a method such as decantation, filtration or centrifugation.
- the prepared polyamide porous fine particles have a polyamide non-solvent compatible with a good solvent of the polyamide solution (A) at a temperature of 40 ° C or higher at a temperature of 40 ° C or higher.
- the good solvent of (A) can be extracted and removed from the polyamide porous fine particle force
- Examples of the polyamide non-solvent used to extract and remove the good solvent of the polyamide solution (A) include aliphatic alcohols, aliphatic or aromatic ketones, aliphatic or aromatic hydrocarbons, and hydraulic power. A compound selected from the group can be mentioned. This non-solvent is good even if it is a mixture of two or more types, and does not dissolve 0.01% by weight or more of polyamide at a liquid temperature of 0 ° C! /.
- Examples of the aliphatic alcohol include monovalent aliphatic alcohols having 1 to 3 carbon atoms such as methanol, ethanol, 1 propanol, and 2-propanol.
- Examples of aliphatic ketones include acetone and methyl ethyl ketone.
- Examples of aromatic ketones include acetophenone, propiophenone, and butyrophenone.
- Examples of aromatic hydrocarbons include toluene and xylene.
- Examples of aliphatic hydrocarbons include heptane, hexane, octane, and n-decane.
- the optical filter of the present invention has crystalline polymer spherulites, and usually at least a part of the layer of the optical filter contains crystalline polymer spherulites. Although it may be a crystalline polymer film that forms a spherulite structure, it preferably contains particles that form the spherulite structure. More preferably, the optical filter has particles as described above and a binder resin for holding the particles.
- a transparent resin is used as a binder resin and particles are dispersed in the transparent resin and formed into a plate shape or a film shape
- the transparent resin for dispersing the particles includes methallyl resin, polystyrene resin, polycarbonate resin, polyester resin, cyclic polyolefin resin, and the like. Can be mentioned.
- the transparent resin is preferably a material having a different refractive index from the (porous) particle when light is diffused, and the same kind of material as the (porous) particle or a porous material when suppressing light scattering. It is preferable that the refractive index is close to the material.
- the mixing ratio of the particles is preferably 0.1 to 60% by weight with respect to the total of the transparent resin and the particles.
- the coating film containing the particles of the aspect (b) is formed on a transparent substrate, the particles are mixed and dispersed in a transparent resin (transparent paint), and the transparent substrate
- a transparent resin transparent paint
- a method of applying to the surface using means such as a spraying method, a destaining method, a curtain flow method, a roll coater method, a printing method, etc., and curing by ultraviolet irradiation or heating is used.
- the noinder used for the transparent paint include acrylic resin, polyester resin, urethane resin and the like.
- the transparent substrate methatal resin, polystyrene resin, polycarbonate resin, poly A transparent resin board such as ester resin and cyclic polyolefin resin can be used, and an inorganic transparent board such as a glass board can also be used.
- the particles may be directly bonded to a transparent substrate with a binder resin (a known adhesive or the like) as in the embodiment (c)!
- a binder resin a known adhesive or the like
- the optical filter 1 of the present invention may be used as it is mounted on a liquid crystal display screen.
- the filter of the present invention may exhibit antireflection and effects such as Z or dazzling without requiring post-surface processing.
- a transparent substrate may be bonded as a protective film to the outer surface of the optical filter.
- the transparent substrate used is not particularly limited as long as it is transparent.
- a polycarbonate resin, a methacrylic resin, a PET resin, a polystyrene resin, a polyolefin resin containing a ring, a transparent glass, etc. Is mentioned.
- the method for depositing the polymer film on the transparent substrate is not particularly limited, and a known method can be used.
- the liquid crystal display device to which the optical filter is attached has a light source device, a rear polarizing plate, a liquid crystal cell, and a front polarizing plate as a basic configuration.
- a light source device a rear polarizing plate
- a liquid crystal cell a liquid crystal cell
- a front polarizing plate a basic configuration
- the liquid crystal cell has at least these four components in the order of the light source device, polarizing plate, liquid crystal cell, and polarizing plate.
- Other components may be provided between and before and after these four components.
- any of the constituent elements is well-known and commonly used, and is not particularly limited.
- the display between the light source device and the liquid crystal cell is displayed more than the rear polarizing plate and the liquid crystal cell in order to distinguish them.
- the one on the front is called the front polarizer.
- the optical filter 1 of the present invention can be disposed further in front of the front polarizing plate.
- an optical compensator or a color filter is arranged in front of the liquid crystal cell.
- the optical filter can be arranged in front of the color filter. If an optical compensator is used, the optical filter is placed on the front side or the rear side of the optical compensator! Good.
- the optical filter of the present invention can be disposed between the light source device and the rear polarizing plate.
- a diffusion film is placed behind the liquid crystal cell.
- the optical filter may be arranged on the front side or the back side of the diffusing film.
- the dried polyamide particles were photographed with a scanning electron microscope, the diameter of 100 particles was measured, the average was obtained, and the number average particle diameter was calculated.
- the volume average particle size and particle size distribution index were calculated from the above.
- the measurement range was from 0.0033 to 400 / ⁇ ⁇ .
- the average pore diameter was determined.
- the specific surface area of the polyamide particles was measured by the BET method with nitrogen adsorption at three points. From this value, the porosity index was determined according to the previously described equation.
- the crystallinity of the polyamide was measured by DSC (differential scanning calorimeter). This was done as previously described.
- UV-visible spectrophotometer V-570 manufactured by JASCO Corporation was used, an integrating sphere was installed in the detector, and the polarization was detected at the inlet of the detector. After two films are installed so that their polarization axes are at right angles, the sample optical filter is inserted between the two polarizing films in the wavelength range of 350 to 800 nm. The transmittance was evaluated. Figure 6 shows the transmittance characteristics of the blank when the sample has no optical filter.
- the phenol and methanol in a weight ratio of 9 To a solution containing at a ratio of 1, polyamide 6 (molecular weight 13, 000) to prepare a polyamide 6 solution of polyamide 6 concentration of 5 mass 0/0 added and dissolved. To this nylon solution, a mixture of methanol and water mixed at a mixing ratio of 7: 0.5 was added. The temperature was room temperature. The mixture was allowed to stand for 24 hours to complete the precipitation. The polymer was then isolated by centrifugation, and the particles were washed by centrifugation and dewatering while applying 50 ° C methanol at 100 times the amount of fine particles.
- the obtained polymer particles were observed with a scanning electron microscope, they were relatively uniform spherical porous particles having a number average particle diameter of 10.0 ⁇ m and a volume average particle diameter of 13.76 ⁇ m. It was.
- the average pore size was 0.05681, PDI 1.36, specific surface area 21.4 m 2 g, porosity index RI 42.1, and the degree of crystallinity of the polymer particles was 56%.
- this porous particle has a single or multiple nuclear forces in the center, three-dimensionally radial nylon fibrils grow, and the single particle itself has a spherulitic structure. And that helped me.
- Methyl methacrylate monomer 99 46 parts by weight, radical polymerization initiator 2-2'-azobis (isobutyl butyl-tolyl) (AIBN) O. 34 parts by weight, chain transfer agent 1-dodecanthiol (n-lauryl) Mercaptan) (n-LM) O. After adding 20 parts by weight, 1.5 parts by weight of the above polyamide porous particles are added, stirred, and thermally polymerized to uniformly disperse the polyamide porous particles. A plate-shaped optical filter having a thickness of about 0.5 mm was prepared.
- Example 1 In order to confirm that the optical filter obtained in Example 1 converts linearly polarized light into the same non-polarized light as natural light with high efficiency, the following work was performed.
- a polarizing film is placed on the liquid crystal display, and the polarizing axis and polarizing film of the liquid crystal display are displayed. It was confirmed that when the optical axis of the camera matches the bright field, the optical axis force during bright field is completely dark field by tilting the optical axis force 90 degrees to the right or left.
- the polarizing film is placed on the liquid crystal display even when the optical axis force during bright field is tilted 90 degrees to the right or left. Confirm that the image can be clearly seen and dark field is eliminated, and that the optical filter of the present invention can convert linearly polarized light into non-polarized light with high efficiency.
- FIG. 4 shows scanning electron micrographs and transmission electron micrographs of true spherical particles, respectively.
- FIG. 7 shows the evaluation results of the depolarization ability of the optical filter prepared in Comparative Example 1 in the same manner as in Example 2.
- Example 3 when the optical filter of Comparative Example 1 was inserted between the liquid crystal display and the polarizing film, if the polarizing film was tilted 90 degrees to the right or left in the bright field, the dark film became completely dark and dark. The vision was improved and helped. It was found that the linearly polarized light cannot be converted into non-polarized light because the sphericity particles have low crystallinity and no good spherulites are formed.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2007800195826A CN101454698B (zh) | 2006-03-30 | 2007-03-29 | 滤光器 |
JP2008510890A JP5146313B2 (ja) | 2006-03-30 | 2007-03-29 | 光フィルター |
EP07740411.9A EP2009471B1 (en) | 2006-03-30 | 2007-03-29 | Optical filter |
KR1020087025404A KR101346089B1 (ko) | 2006-03-30 | 2007-03-29 | 광 필터 |
US12/295,412 US8035777B2 (en) | 2006-03-30 | 2007-03-29 | Optical filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006095909 | 2006-03-30 | ||
JP2006-095909 | 2006-03-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007119592A1 true WO2007119592A1 (ja) | 2007-10-25 |
Family
ID=38609364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/056973 WO2007119592A1 (ja) | 2006-03-30 | 2007-03-29 | 光フィルター |
Country Status (6)
Country | Link |
---|---|
US (1) | US8035777B2 (ja) |
EP (1) | EP2009471B1 (ja) |
JP (1) | JP5146313B2 (ja) |
KR (1) | KR101346089B1 (ja) |
CN (1) | CN101454698B (ja) |
WO (1) | WO2007119592A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009163145A (ja) * | 2008-01-09 | 2009-07-23 | Fujifilm Corp | 光学デバイス |
JP2009251035A (ja) * | 2008-04-01 | 2009-10-29 | Nitto Denko Corp | 偏光解消フィルム、その製造方法、光学フィルムおよび液晶表示装置 |
JP2010091655A (ja) * | 2008-10-06 | 2010-04-22 | Nitto Denko Corp | 光学積層体および画像表示装置 |
WO2010101140A1 (ja) * | 2009-03-04 | 2010-09-10 | 林テレンプ株式会社 | 偏光解消フィルム |
JP2010281986A (ja) * | 2009-06-04 | 2010-12-16 | Ube Ind Ltd | 光拡散フィルム |
WO2011132680A1 (ja) | 2010-04-20 | 2011-10-27 | 宇部興産株式会社 | ポリアミド微粒子及びその製造方法並びにそれを用いた光学フィルム及び液晶表示装置 |
JP2013054271A (ja) * | 2011-09-06 | 2013-03-21 | Nissan Motor Co Ltd | 表示装置、自動車用表示装置、及び表示装置の製造方法 |
WO2013179851A1 (ja) * | 2012-05-31 | 2013-12-05 | 林テレンプ株式会社 | 光透過性充填材料、それを用いる表示装置の製造方法および表示装置 |
JP2019503769A (ja) * | 2016-02-05 | 2019-02-14 | ザ ユニバーシティ オブ ブリストル | 偏光に対する感度の測定 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104155793B (zh) * | 2014-07-22 | 2017-02-15 | 京东方科技集团股份有限公司 | 一种显示装置 |
CN109476851B (zh) * | 2016-07-19 | 2022-04-05 | 大赛璐赢创株式会社 | 聚酰胺粒子及其制造方法、其树脂组合物以及成型品 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4819257B1 (ja) * | 1969-04-02 | 1973-06-12 | ||
JPS5499446A (en) * | 1978-01-23 | 1979-08-06 | Fuji Photo Film Co Ltd | Light diffuser |
JPH06308496A (ja) | 1993-04-22 | 1994-11-04 | Sharp Corp | 液晶表示素子 |
JPH1010522A (ja) | 1996-06-24 | 1998-01-16 | Dainippon Printing Co Ltd | 液晶表示装置 |
JP2001521198A (ja) * | 1997-10-24 | 2001-11-06 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 拡散反射物品 |
JP2003185821A (ja) | 2001-12-14 | 2003-07-03 | Katsuto Ono | 目の疲れを押える効果のあるフィルター |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3591253A (en) * | 1969-07-02 | 1971-07-06 | Eastman Kodak Co | Rear projection screen |
JPH07152024A (ja) * | 1993-05-17 | 1995-06-16 | Sharp Corp | 液晶表示素子 |
JP2968171B2 (ja) | 1994-06-09 | 1999-10-25 | シャープ株式会社 | 液晶表示素子 |
JP3267844B2 (ja) * | 1994-11-09 | 2002-03-25 | シャープ株式会社 | 液晶素子およびその製造方法 |
JPH0921913A (ja) * | 1995-07-05 | 1997-01-21 | Sharp Corp | 軸対称偏光板及びその製造方法,並びに液晶表示装置 |
JP3821315B2 (ja) * | 1995-11-13 | 2006-09-13 | シャープ株式会社 | 液晶表示装置およびその製造方法 |
US5877829A (en) * | 1995-11-14 | 1999-03-02 | Sharp Kabushiki Kaisha | Liquid crystal display apparatus having adjustable viewing angle characteristics |
JP3167605B2 (ja) * | 1995-12-25 | 2001-05-21 | シャープ株式会社 | 液晶表示素子 |
US5825543A (en) * | 1996-02-29 | 1998-10-20 | Minnesota Mining And Manufacturing Company | Diffusely reflecting polarizing element including a first birefringent phase and a second phase |
JPH09304757A (ja) * | 1996-03-11 | 1997-11-28 | Sharp Corp | 液晶表示素子及びその製造方法 |
US6344883B2 (en) * | 1996-12-20 | 2002-02-05 | Sharp Kabushiki Kaisha | Liquid crystal display device and method for producing the same |
US6497946B1 (en) * | 1997-10-24 | 2002-12-24 | 3M Innovative Properties Company | Diffuse reflective articles |
EP1451635A2 (en) * | 2001-11-09 | 2004-09-01 | 3M Innovative Properties Company | Optical devices having reflective and transmissive modes for display |
TW200624944A (en) * | 2005-01-14 | 2006-07-16 | Hon Hai Prec Ind Co Ltd | Light guide plate and backlight module |
US7745504B2 (en) * | 2005-02-02 | 2010-06-29 | Ube Industries, Ltd. | Process for producing porous spherical polyamide particle |
CN101198642A (zh) * | 2005-04-15 | 2008-06-11 | 宇部兴产株式会社 | 多孔聚酰胺微粉的精制方法 |
CN101313019B (zh) * | 2005-09-27 | 2011-08-03 | 宇部兴产株式会社 | 聚酰胺多孔性球状颗粒 |
-
2007
- 2007-03-29 EP EP07740411.9A patent/EP2009471B1/en not_active Expired - Fee Related
- 2007-03-29 WO PCT/JP2007/056973 patent/WO2007119592A1/ja active Application Filing
- 2007-03-29 US US12/295,412 patent/US8035777B2/en not_active Expired - Fee Related
- 2007-03-29 CN CN2007800195826A patent/CN101454698B/zh not_active Expired - Fee Related
- 2007-03-29 JP JP2008510890A patent/JP5146313B2/ja not_active Expired - Fee Related
- 2007-03-29 KR KR1020087025404A patent/KR101346089B1/ko not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4819257B1 (ja) * | 1969-04-02 | 1973-06-12 | ||
JPS5499446A (en) * | 1978-01-23 | 1979-08-06 | Fuji Photo Film Co Ltd | Light diffuser |
JPH06308496A (ja) | 1993-04-22 | 1994-11-04 | Sharp Corp | 液晶表示素子 |
JPH1010522A (ja) | 1996-06-24 | 1998-01-16 | Dainippon Printing Co Ltd | 液晶表示装置 |
JP2001521198A (ja) * | 1997-10-24 | 2001-11-06 | ミネソタ マイニング アンド マニュファクチャリング カンパニー | 拡散反射物品 |
JP2003185821A (ja) | 2001-12-14 | 2003-07-03 | Katsuto Ono | 目の疲れを押える効果のあるフィルター |
Non-Patent Citations (1)
Title |
---|
See also references of EP2009471A4 * |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009163145A (ja) * | 2008-01-09 | 2009-07-23 | Fujifilm Corp | 光学デバイス |
JP2009251035A (ja) * | 2008-04-01 | 2009-10-29 | Nitto Denko Corp | 偏光解消フィルム、その製造方法、光学フィルムおよび液晶表示装置 |
JP2010091655A (ja) * | 2008-10-06 | 2010-04-22 | Nitto Denko Corp | 光学積層体および画像表示装置 |
US20110310482A1 (en) * | 2009-03-04 | 2011-12-22 | Hayashi Telempu Co., Ltd. | Depolarizing film |
WO2010101140A1 (ja) * | 2009-03-04 | 2010-09-10 | 林テレンプ株式会社 | 偏光解消フィルム |
US8724220B2 (en) | 2009-03-04 | 2014-05-13 | Hayashi Telempu Co., Ltd. | Depolarizing film having an optically anisotropic volumetric region |
JP5643744B2 (ja) * | 2009-03-04 | 2014-12-17 | 林テレンプ株式会社 | 偏光解消フィルム |
JP2010281986A (ja) * | 2009-06-04 | 2010-12-16 | Ube Ind Ltd | 光拡散フィルム |
WO2011132680A1 (ja) | 2010-04-20 | 2011-10-27 | 宇部興産株式会社 | ポリアミド微粒子及びその製造方法並びにそれを用いた光学フィルム及び液晶表示装置 |
JP2013054271A (ja) * | 2011-09-06 | 2013-03-21 | Nissan Motor Co Ltd | 表示装置、自動車用表示装置、及び表示装置の製造方法 |
WO2013179851A1 (ja) * | 2012-05-31 | 2013-12-05 | 林テレンプ株式会社 | 光透過性充填材料、それを用いる表示装置の製造方法および表示装置 |
JPWO2013179851A1 (ja) * | 2012-05-31 | 2016-01-18 | 林テレンプ株式会社 | 光透過性充填材料、それを用いる表示装置の製造方法および表示装置 |
JP2019503769A (ja) * | 2016-02-05 | 2019-02-14 | ザ ユニバーシティ オブ ブリストル | 偏光に対する感度の測定 |
US11234590B2 (en) | 2016-02-05 | 2022-02-01 | The University Of Bristol | Measuring sensitivity to polarized light |
Also Published As
Publication number | Publication date |
---|---|
CN101454698A (zh) | 2009-06-10 |
US20090310067A1 (en) | 2009-12-17 |
KR101346089B1 (ko) | 2013-12-31 |
EP2009471A4 (en) | 2009-11-25 |
JPWO2007119592A1 (ja) | 2009-08-27 |
EP2009471A1 (en) | 2008-12-31 |
JP5146313B2 (ja) | 2013-02-20 |
EP2009471B1 (en) | 2017-03-15 |
KR20090007332A (ko) | 2009-01-16 |
CN101454698B (zh) | 2013-06-05 |
US8035777B2 (en) | 2011-10-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2007119592A1 (ja) | 光フィルター | |
JP5641044B2 (ja) | ポリアミド微粒子及びその製造方法並びにそれを用いた光学フィルム及び液晶表示装置 | |
CN102197331B (zh) | 基于拉伸聚合物薄膜的光学补偿薄膜 | |
CN102822701A (zh) | 防眩性膜、防眩性膜的制造方法、偏振片和图像显示装置 | |
US8865313B2 (en) | Optical retardation film and method of production thereof | |
CN102782530A (zh) | 防眩性膜、防眩性膜的制造方法、偏振片和图像显示装置 | |
CN105683824A (zh) | 液晶显示装置 | |
JP5096314B2 (ja) | 透明なポリアミドフィルム | |
KR101604661B1 (ko) | 편광 해소 필름 | |
JP2015513692A (ja) | 光学フィルム | |
TW201726771A (zh) | 光學膜以及圖像顯示裝置 | |
KR20150134347A (ko) | 광학 필름 및 그의 제조 방법, 및 광학 필름을 구비한 편광판, 액정 표시 장치, 편광 프로젝터용 스크린 | |
JP5425672B2 (ja) | 光拡散フィルムの製造方法 | |
TW201329147A (zh) | 樹脂組成物及使用其形成之光學膜 | |
JP5347215B2 (ja) | 光学スクリーンおよびプロジェクション式画像表示システム | |
CN102395908A (zh) | 带粘合剂层的相位差膜、使用了其的椭圆偏振板和液晶显示装置 | |
JP5386955B2 (ja) | ポリアミド多孔質略球状粒子および光学材料 | |
JP2007219183A (ja) | 光散乱性材料 | |
JP7290003B2 (ja) | ポリアミド系複合フィルムおよびこれを含むディスプレイ装置 | |
JP2021047402A (ja) | 光学部材及び画像表示装置 | |
WO2015182517A1 (ja) | 光学フィルムおよびその製造方法、ならびに光学フィルムを備えた偏光板、液晶表示装置、偏光プロジェクター用スクリーン | |
JP2008179702A (ja) | オーバーコート膜用組成物、オーバーコート膜および光学素子 | |
EP0927745A1 (en) | Optical plastic material and process for the production thereof | |
KR102074920B1 (ko) | 셀프어셈블리형 방현필름 및 이의 제조방법 | |
JP2014106317A (ja) | 光拡散シート及びポリアミド多孔質微粒子 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780019582.6 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07740411 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008510890 Country of ref document: JP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
REEP | Request for entry into the european phase |
Ref document number: 2007740411 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2007740411 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020087025404 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12295412 Country of ref document: US |