| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 349119000 | Multiple compensators | 42 |
| 20080212003 | Liquid crystal display device - A liquid crystal display device includes a pair of polarizing films; a liquid crystal cell that is sandwiched between the pair of polarizing films; a retardation layer (A) of 70 μm or less in thickness, which is disposed between the liquid crystal cell and one of the pair of polarizing films; and a retardation layer (B) of 70 μm or less in thickness, which is disposed between the liquid crystal cell and the other of the pair of polarizing films, wherein the retardation layers (A) and (B) satisfy following formulae (1) to (3): | 09-04-2008 |
| 20080239221 | REFLECTION TYPE LIQUID CRYSTAL DISPLAY PANEL - A reflection type liquid crystal display panel includes a polarizing plate, a first liquid crystal molecule, and a first corrective membrane. A longitudinal axis of the first liquid crystal molecule is perpendicular to the polarizing plate. The first corrective membrane is interposed between the polarizing plate the first liquid crystal molecule. The first corrective membrane is for correcting phase delay of polarizing light transmitted through the first liquid crystal molecule. | 10-02-2008 |
| 20080278669 | TWISTED NEMATIC LIQUID CRYSTAL DISPLAY STRUCTURE - A twisted nematic liquid crystal display (TN-LCD) structure is provided, which includes a twisted nematic (TN) liquid crystal layer, a first laminated polarizing film, and a second laminated polarizing film. The first laminated polarizing film and the second laminated polarizing film are respectively disposed on a first side and a second side of the TN liquid crystal layer. By means of an angle formed between a first absorption axis of a first linear polarizing film for the first laminated polarizing film and a second absorption axis of a second linear polarizing film for the second laminated polarizing film, the LCD structure of the present invention has the efficacy of an enlarged view angle, improved contrast, and low cost. | 11-13-2008 |
| 20090033851 | Liquid crystal display device - A novel liquid crystal display device is disclosed. the device comprises a liquid crystal cell comprising a pair of substrates disposed facing each other, at least one of said pair of substrates having an electrode thereon, and a liquid crystal layer held between said pair of substrates, comprising a nematic liquid crystal material, molecules of which being oriented nearly normal to the surfaces of said pair of substrates in a black state, a first and a second polarizing films disposed while placing said liquid crystal cell in between; and at least two optically anisotropic films, each of them disposed respectively between said liquid crystal layer and each of said first and said second polarizing films, wherein, assuming thickness of said liquid crystal layer as d (nm), refractive index anisotropy of said liquid crystal layer at wavelength λ (nm) as Δn (λ), and in-plane retardation of said optical compensation film at wavelength λ as Re(λ), relations (I) to (IV) below are satisfied at least at two different wavelengths in a wavelength range from 380 nm to 780 nm: | 02-05-2009 |
| 20090059143 | POLARIZING PLATE PROVIDED WITH OPTICAL COMPENSATION LAYERS AND IMAGE DISPLAY APPARATUS USING THE SAME - There is provide a polarizing plate provided with optical compensation layers capable of performing viewing angle compensation with respect to a liquid crystal cell, providing broadband circular polarization, contributing to thickness reduction, preventing uneven display due to heat, and favorably preventing light leak in black display, and an image display apparatus using the same. The polarizing plate provided with optical compensation layers of the present invention includes a polarizer, a first optical compensation layer, and a second optical compensation layer in the stated order, wherein: the first optical compensation layer contains a resin having an absolute value of photoelastic coefficient of 2×10 | 03-05-2009 |
| 20090059144 | Multiple Cell Gaps Transreflective LCD and Fabricating Method Thereof - A LCD having multiple cell gaps and a method producing the same are provided. By stacking various numbers of dielectric layers and/or a photosensitive organic layer with various thicknesses on a display array substrate, various cell gaps for pixels of various colors can be obtained. | 03-05-2009 |
| 20090059145 | LIQUID CRYSTAL DISPLAY DEVICE - The liquid crystal display device according to this invention includes a control structure provided at each of or one of a liquid crystal side of a first substrate and a liquid crystal side of a second substrate to control a tilt direction of a liquid crystal upon application of a voltage to a liquid crystal layer, a first domain where a liquid crystal tilts in one direction upon application of a voltage to a liquid crystal layer, and a second domain where a liquid crystal tilts in a direction different from the tilt direction of the liquid crystal in the first domain by substantially 180°. Herein, an angle formed by the tilt direction of the liquid crystal in the first domain and a horizontal direction of a screen in the liquid crystal display device falls within a range between 22° and 39° or a range between 51° and 68°. | 03-05-2009 |
| 20090066899 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes a liquid crystal display panel to which an OCB mode is applied, and an optical compensation element which optically compensates a retardation of the liquid crystal layer in a predetermined display state in which a voltage is applied to the liquid crystal layer. The optical compensation element includes a polarizer, a first retardation plate which is disposed between the polarizer and the liquid crystal display panel and in which discotic liquid crystal molecules are fixed in a state in which the discotic liquid crystal molecules are hybrid-aligned along a normal direction, and a second retardation plate which is disposed between the polarizer and the first retardation plate and has wavelength dispersion characteristics which are opposite to wavelength dispersion characteristics of an in-plane retardation in the liquid crystal layer. | 03-12-2009 |
| 20090086138 | LAMINATED OPTICAL FILM, POLARIZING PLATE AND LIQUID CRYSTAL DISPLAY DEVICE - A laminated optical film including a first optical anisotropic layer, and a second optical anisotropic layer, wherein Relationship (1) is satisfied when a slow phase axis of the first optical anisotropic layer is substantially perpendicular to a slow phase axis of the second optical anisotropic layer, | 04-02-2009 |
| 20090109385 | LIQUID CRYSTAL PANEL AND LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal panel of the present invention includes at least a liquid crystal cell, a first polarizer disposed on one side of the liquid crystal cell, a second polarizer disposed on the other side of the liquid crystal cell and a retardation film (A) disposed between the liquid crystal cell and the first polarizer, wherein the retardation film (A) contains a thermoplastic polymer having at least a substituent (a) represented by the following formula (I) and its in-plane retardation value (Re[750]) at a wavelength of 750 nm is larger than its retardation value (Re[550]) at a wavelength of 550 nm. The liquid crystal panel has such an effect that it reduces coloring of characters or images and a color shift even if a screen is viewed from any direction at an angle range of 360°. | 04-30-2009 |
| 20090147194 | Liquid crystal display device - A liquid crystal display device of a simplified structure and a widened viewing angle are provided. The liquid crystal display device having a stacked structure with its component plates and layers laid one over another in the following top-down order, comprises a first polarizing plate of α in optic-axial angle, a first λ/2 retardation plate of β in the optic-axial angle, a first λ/4 retardation plate of γ in the optic-axial angle, a liquid crystal layer located as an interlayer between two of substrates and having its opposite major surfaces oriented in vertical directions, a second λ/4 retardation plate disposed in phase or in parallel with the first λ/4 retardation plate (i.e., the optic-axial angle of γ), a second λ/2 retardation plate of (2γ−β) in the optic-axial angle, and a second polarizing plate of (π/2−α+2γ) in the optic-axial angle. | 06-11-2009 |
| 20090168001 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device comprising a pair of substrates, at least one polarizing film provided outside the pair of substrates, a liquid crystal cell having a red color filter, a green color filter and a blue color filter provided inside the pair of substrates, a first retardation film compensating for light of a wavelength or wavelengths corresponding to a color or colors of any one or two of the three color filters, and a second retardation film compensating for light of a wavelength that is not compensated for by the first retardation film. | 07-02-2009 |
| 20090207355 | LIQUID-CRYSTAL DISPLAY DEVICE - A liquid-crystal display device comprising a liquid-crystal cell having a liquid-crystal layer that aligns vertically to the substrate thereof in the black state, first and second polarizing elements that are disposed to sandwich the liquid-crystal cell therebetween in a manner that their absorption axes are perpendicular to each other, an optically-biaxial retardation film A disposed between the first polarizing element and the liquid-crystal cell, and an optically-biaxial retardation film B disposed between the second polarizing element and the liquid-crystal cell, wherein the retardation films A and B differ from each other in the optical anisotropy, is disclosed. | 08-20-2009 |
| 20090251650 | Liquid crystal display device - A liquid crystal display device comprising a first polarizer, a first retardation film satisfying (1) to (6) below, a liquid crystal cell, a second retardation film satisfying (7) to (12) below, a second polarizer in this order wherein the absorption axis of the first and second polarizer and the slow axis of the first and second retardation film are substantially in parallel, respectively: | 10-08-2009 |
| 20100026945 | CONTRAST COMPENSATION OF MICRODISPLAY PANELS INCLUDING A HIGH ORDER WAVEPLATE - A contrast compensator for improving the panel contrast of liquid crystal (LC) microdisplays having a high-order waveplate configured as an O-plate and supporting a thin film transistor layer is provided. The contrast compensator includes a counter high-order waveplate configured as an O-plate, which has a birefringence opposite in sign to a birefringence of the thin film transistor substrate. | 02-04-2010 |
| 20100026946 | LIQUID CRYSTAL DISPLAY - A liquid crystal display includes: a liquid crystal layer squeezed between first and second transparent substrates and vertically aligned at a retardation of 300 nm or larger to 940 nm or smaller; two or three viewing angle compensators disposed on the first transparent substrate on the side opposite to the liquid crystal layer, each of the viewing angle compensators having a retardation of 90 nm or larger to 350 nm or smaller in a thickness direction and a retardation of 5 nm or larger to 30 nm or smaller in an in-plane direction; a first polarizer disposed on the two or three viewing angle compensator; and a second polarizer disposed on the second transparent substrate and crossed-Nichol disposed relative to the first polarizer, wherein an in-plane slow axis of each viewing angle compensator is disposed perpendicular to an absorption axis of the first polarizer. | 02-04-2010 |
| 20100053520 | Very Thin Achromatic Quarter Wave Film Laminate for Transflective LCD and Method for Producing the Same - Disclosed herein is an very thin achromatic quarter wave film laminate for transflective LCD included in an LCD polarizer. More specifically, the very thin achromatic quarter wave film laminate for transflective LCD has a considerably reduced thickness, as compared to conventional quarter wave films in which anisotropic polymeric films are laminated. | 03-04-2010 |
| 20100053521 | LIQUID CRYSTAL DISPLAY AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to compensation films of a vertically-aligned liquid crystal display. Upper and lower compensation films asymmetrically differ in refractive index from each other. | 03-04-2010 |
| 20100053522 | LIQUID CRYSTAL DISPLAY - A liquid crystal display includes: a liquid crystal layer squeezed between first and second substrates and vertically aligned at a retardation of 300-1000 nm; first and second compensators disposed on the first substrate and having negative biaxial optical anisotropy; a first polarizer disposed on the first and second compensators; and a second polarizer on the second substrate disposed crossed-Nichol with said first polarizer, wherein: the second compensator is disposed between the first substrate and first compensator; an in-plane slow axis of the first compensator is disposed perpendicular to an absorption axis of the first polarizer; the in-plane slow axis of the first compensator is disposed perpendicular to an in-plane slow axis of the second compensator; and a retardation in an in-plane direction of the first compensator is larger than that of the second compensator. | 03-04-2010 |
| 20100085522 | TRANSMISSIVE LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a transparent liquid crystal display device which is less in display characteristics and viewing angle dependency and can provide bright images and high contrasts. The transparent liquid crystal display device comprises at least: a backlight; a polarizer; a second optical anisotropic layer with a retardation of 50 to 180 nm at a wavelength of 550 nm; a first optical anisotropic layer with a retardation of 20 to 140 nm at a wavelength of 550 nm; a homogeneously aligned liquid crystal cell comprising upper and lower substrates facing each other and a liquid crystal layer sandwiched between the upper and lower substrates; a third optical anisotropic layer with a retardation of 50 to 200 nm at a wavelength of 550 nm; and a polarizer, arranged in piles in this order from the backlight, wherein the first optical anisotropic layer comprising at least a liquid crystal film with a fixed nematic hybrid liquid crystal alignment structure. | 04-08-2010 |
| 20100118242 | PHASE MODULATOR SYSTEM COMPRISING A BEAM SPLITTER AND A LINEAR POLARISATION MODE PHASE MODULATOR AND METHOD FOR SEPARATING A LIGHT BEAM TRAVELLING TOWARD AND REFLECTED BACK FROM SUCH A PHASE MODULATOR - The object of the invention is a phase modulator system comprising a beam splitter and a reflection mode phase modulator suitable for modulating linearly polarised light of at least one specific polarisation state while maintaining said polarisation state. The beam splitter and the phase modulator are arranged along an optical path of a light beam. The beam splitter is a polarisation beam splitter and the phase modulator system further comprises an optical rotator being arranged along the optical path between the polarisation beam splitter and the phase modulator, and rotating the polarisation state of the light beam by | 05-13-2010 |
| 20100134737 | LIQUID CRYSTAL PANEL, LIQUID CRYSTAL DISPLAY APPARATUS USING THE PANEL, AND METHOD OF PRODUCING A LIQUID CRYSTAL PANEL - Provided are a liquid crystal panel and a liquid crystal display apparatus each of which: contributes to a reduction in thickness; and is excellent in optical characteristics, and a method of producing the liquid crystal panel with extremely high production efficiency. A liquid crystal panel of the present invention has a first polarizer, a first protective layer, a first optical compensation layer, a first negative C plate, a liquid crystal cell, a second negative C plate, a second optical compensation layer, a second protective layer, and a second polarizer in the stated order. The first optical compensation layer is arranged between the first protective layer and the first negative C plate to be in close contact with the first protective layer without using any adhesive. The second optical compensation layer is arranged between the second negative C plate and the second protective layer to be in close contact with the second protective layer without using any adhesive. The first and second optical compensation layers are each a coating layer functioning as a λ/4 plate, and each have a thickness of 0.3 to 3 μm. The first and second negative C plates are each a coating layer, and each have a thickness of 0.5 to 10 μm. | 06-03-2010 |
| 20100149472 | RETARDATION ELEMENT AND DISPLAY - A retardation element allowing a reduction in ghosts caused by optical anisotropy of a base film, and a display including the retardation element are provided. A retardation element includes: a base film having optical anisotropy; and a retardation layer formed on the base film and having optical anisotropy, in which the retardation layer includes retardation regions of two or more kinds of which slow axes are oriented in different directions from one another, the retardation regions of two or more kinds are arranged regularly adjacent to one another in an in-plane direction of the base film, and each of the retardation regions has a slow axis in a direction intersecting with a slow axis of the base film at an angle larger than 45°. | 06-17-2010 |
| 20100188626 | IN-PLANE SWITCHING LIQUID CRYSTAL DISPLAY INCLUDING VIEWING ANGLE COMPENSATION FILM USING +A-PLATE - Disclosed is an in-plane switching liquid crystal display. The in-plane switching liquid crystal display uses at least one A-plate and adjusts the optical axis direction and the retardation value of the A-plate, thereby improving the contrast characteristic at a front and at a predetermined inclination angle of the in-plane switching liquid crystal display while minimizing a color shift according to viewing angles in the black state. | 07-29-2010 |
| 20100188627 | IN-PLANE SWITCHING LIQUID CRYSTAL DISPLAY INCLUDING VIEWING ANGLE COMPENSATION FILM USING +A-PLATE - Disclosed is an in-plane switching liquid crystal display. The in-plane switching liquid crystal display uses at least one A-plate and adjusts the optical axis direction and the retardation value of the A-plate, thereby improving the contrast characteristic at a front and at a predetermined inclination angle of the in-plane switching liquid crystal display while minimizing a color shift according to viewing angles in the black state. | 07-29-2010 |
| 20100208181 | OPTICAL COMPENSATION FILMS - The invention relates to compensation films for liquid-crystal displays with additions of rod-shaped liquid crystals mentioned below, to polariser plates which have at least one compensation film of this type, to liquid-crystal displays which have compensation films of the said type, and to processes for the production of the said compensation films, polariser plates and liquid-crystal displays, to the use of the compounds described in greater detail below as additions to compensation films for liquid-crystal displays, and to further subject-matters of the invention which can be seen below. | 08-19-2010 |
| 20100277679 | Liquid Crystal Panel and Liquid Crystal Display Apparatus - There are provided a liquid crystal panel and a liquid crystal display apparatus each having an excellent screen contrast, a small color shift, and small display unevenness. The liquid crystal panel includes a liquid crystal cell, a first polarizer, a second polarizer, a protective layer, a first optical compensation layer and a second optical compensation layer. The protective layer has relationships of 0 nm≦Δnd (550) 10 nm and 0 nm≦Rth(550) 20 nm. The first optical compensation layer has an absolute value of a photoelastic coefficient of | 11-04-2010 |
| 20100296037 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device having a high contrast ratio and no coloring during black display, over a wide viewing angle range. The liquid crystal display device of the present invention includes a reverse wavelength dispersion-type biaxial retardation film having R | 11-25-2010 |
| 20100328593 | OPTICAL FILM ASSEMBLY AND DISPLAY DEVICE HAVING THE SAME - An optical film assembly includes a first polarization plate disposed below a liquid crystal layer and having a first absorption axis, a second polarization plate disposed above the liquid crystal layer and having a second absorption axis, an A-plate disposed between the first polarization plate and the second polarization plate, and a negative C-plate disposed between the first polarization plate and the second polarization plate. A thickness-direction phase retardation value of the negative C-plate is equal to or less than a value acquired by subtracting about 75 nanometers from a thickness-direction phase retardation value of the liquid crystal layer and the thickness-direction phase retardation value of the negative C-plate is equal to or greater than a value acquired by subtracting about 275 nanometers from the thickness-direction phase retardation value of the liquid crystal layer. | 12-30-2010 |
| 20110025966 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device that has a higher contrast ratio in a wide viewing angle and that can be easily produced at low cost. The present invention is a liquid crystal display device, including in the following order:
| 02-03-2011 |
| 20110043736 | LIQUID CRYSTAL DISPLAY AND BIAXIAL COMPENSATION FILM - A liquid crystal display including a liquid crystal panel and a biaxial compensation film is provided. The liquid crystal panel has a first surface and a second surface. The biaxial compensation film is disposed on the first surface and includes a C-plate compensation film and nano-structures on the C-plate compensation film serving as an A-plate compensation film. | 02-24-2011 |
| 20110234953 | PATTERNED BIREFRINGENT PRODUCT - A product comprising a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern, comprising at least an intensity gradation-type pixel of approximately uniform birefringence and an area gradation-type pixel comprising two or more of drawing units of different birefringence, and each region of a single birefringence in the patterned optically anisotropic layer comprising a plurality of the drawing units is provided. The product permits the formation of full-color images (latent images) and includes delicate color representation, such as the densities of particular colors. | 09-29-2011 |
| 20120038870 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device includes an OCB mode liquid crystal display panel, and an optical compensation element which is disposed outside of the liquid crystal display layer. The optical compensation element includes a polarizer plate, a first retardation plate which is disposed between the polarizer plate and the liquid crystal layer, and a second retardation plate which is disposed between the polarizer plate and the first retardation plate and has a biaxial refractive index anisotropy. The optical compensation element compensates a difference of a polarization state that differs between azimuth directions of light passing through the liquid crystal layer and compensates a shift of the polarization state of light, which passes through the retardation plate, from an azimuth direction of an absorption axis of the polarizer plate. | 02-16-2012 |
| 20120069279 | Graded Index Birefringent Component and Manufacturing Method Thereof - A graded index birefringent component is described and shown with at least one liquid crystal layer having a plurality of lens segments, wherein the orientation of the liquid crystal molecules varies across each lens segment of the liquid crystal layer. | 03-22-2012 |
| 20130229605 | LIQUID CRYSTAL DISPLAY AND OPTICAL COMPENSATION FILM THEREFOR - A compensation film for a liquid crystal display having a characteristic that R | 09-05-2013 |
| 20160187697 | LIQUID CRYSTAL DISPLAY - An LCD includes a first TAC film, a first optical uniaxial phase compensating film, an LC cell, a second optical uniaxial phase compensating film and a second TAC film from the incident surface to the emitting surface. The first optical uniaxial phase compensating film is used for providing a first compensating value and a second compensating value by adjusting thickness and by adjusting a first refractive index, a second refractive index, and a third refractive index. The second optical uniaxial phase compensating film is used for providing a third compensating value by adjusting thickness and by adjusting a fourth refractive index, a fifth refractive index, and a sixth refractive index. Leakage of light is controlled according to the first compensating value, the second compensating value, and the third compensating value in the LCD. | 06-30-2016 |
| 20160187727 | LIQUID CRYSTAL DISPLAY - An LCD includes a first TAC film, a first optical uniaxial phase compensating film, an LC cell, a second optical uniaxial phase compensating film and a second TAC film from the incident surface to the emitting surface. The first optical uniaxial phase compensating film is used for providing a first compensating value and a second compensating value by adjusting thickness and by adjusting a first refractive index, a second refractive index, and a third refractive index. The second optical uniaxial phase compensating film is used for providing a third compensating value by adjusting thickness and by adjusting a fourth refractive index, a fifth refractive index, and a sixth refractive index. Leakage of light is controlled according to the first compensating value, the second compensating value, and the third compensating value in the LCD. | 06-30-2016 |
| 349120000 | Including at least one with negative intrinsic birefringence | 5 |
| 20090009702 | Liquid Crystal Device and Electronic Apparatus - A liquid crystal device includes a pair of substrates, a liquid crystal, a first optical compensation element, and a second optical compensation element. The liquid crystal is pretilted by the alignment layers. The first optical compensation element has a positive uniaxiality and a first optical axis inclined in a direction different from the pretilted direction of the liquid crystal molecules. The second optical compensation element has a positive uniaxiality and a second optical axis aligned with the pair of substrates. | 01-08-2009 |
| 20090244455 | IMAGE DISPLAY APPARATUS AND OPTICAL COMPENSATION DEVICE - An image display apparatus includes a liquid crystal panel having a liquid crystal layer disposed between a pair of substrates, and an optical compensation plate pair including a first optical compensation plate and a second optical compensation plate, the first optical compensation plate being formed of a negative uniaxial crystal and the second optical compensation plate being formed of a positive uniaxial crystal. The optical compensation plate pair is configured such that an optical phase difference caused by a difference in thickness between the first optical compensation plate and the second optical compensation plate cancels an optical phase difference generated by the liquid crystal panel. | 10-01-2009 |
| 20110051062 | METHOD FOR PRODUCING LIQUID CRYSTAL DISPLAY DEVICE, AND LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a method for easily producing at low cost a liquid crystal display device which can achieve a higher contrast ratio in a wide viewing angle range, and a liquid crystal display device. The present invention relates to a method for producing a liquid crystal display device including a first polarizer, a first birefringent layer, a liquid crystal cell, a second birefringent layer, and a second polarizer in this order. The production method comprises at least one of the following first and second steps. The first step includes: laterally stretching a raw film for the first birefringent layer including a material with positive intrinsic birefringence to produce the first birefringent layer; and bonding the first polarizer and the first birefringent layer by roll-to-roll processing. The second step includes: laterally stretching a raw film for the second birefringent layer including a material with negative intrinsic birefringence to produce the second birefringent layer; and bonding the second polarizer and the second birefringent layer by roll-to-roll processing. | 03-03-2011 |
| 20120212694 | Liquid Crystal Optical Device Configured to Reduce Polarization Dependent Loss and Polarization Mode Dispersion - An LC-based optical device compensates for differences in optical path lengths of polarization components of input beam. As a result, PDL and PMD of the optical device are reduced. The compensation mechanism may be a glass plate that is disposed in an optical path of a polarization component so that the optical path length of that polarization component can be made substantially equal to the optical path length of the other polarization component that traverses through a half-wave plate. Another compensation mechanism is a birefringent displacer that has two sections sandwiching a half-wave plate, wherein the two sections are of different widths and the planar front surface of the birefringent displacer can be positioned to be non-orthogonal with respect to the incident input light beam. | 08-23-2012 |
| 20140293202 | OPTICAL FILM AND LIQUID CRYSTAL DISPLAY DEVICE COMPRISING THE OPTICAL FILM - Disclosed is an optical film produced by a method comprising continuously discharging a molten resin on a casting roll through a die lip of an extruder, wherein the molten resin contains a copolymer of (A) 75 to 99% by weight of an (meth)acrylate monomer that, when homopolymerized, has a negative intrinsic birefringence, and (B) 1 to 25% by weight of an (meth)acrylate monomer that, when homopolymerized, has a positive intrinsic birefringence, and a velocity ratio V | 10-02-2014 |
