With Refractive Indices In The X, Y, And Z Directions Patents (Class 349/118)
  • Patent number: 10948778
    Abstract: A liquid crystal display panel of the present invention includes, sequentially from the viewer side: a first linearly polarizing plate; a first ?/4-wavelength layer; a first substrate including a color filter, a black matrix, and a second ?/4-wavelength layer; a liquid crystal layer; a second substrate; and a second linearly polarizing plate, the liquid crystal display panel further including a sealing material disposed so as to surround the liquid crystal layer in a plan view, wherein the second ?/4-wavelength layer is disposed closer to the liquid crystal layer than the color filter and the black matrix are and such that an outer edge of the second ?/4-wavelength layer lies inside an arrangement region of the sealing material, and the first ?/4-wavelength layer and the second ?/4-wavelength layer are disposed such that their slow axes are perpendicular to each other.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: March 16, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masahiro Hasegawa, Koji Murata, Yuichi Kawahira, Takako Koide, Kozo Nakamura, Akira Sakai, Kiyoshi Minoura
  • Patent number: 10725217
    Abstract: A compensation film satisfies Inequalities 1 and 2, and an antireflective film and a display device are provided with the compensation film. 0.90 ? R e ? ( ?° ) + R e ? ( - ?° ) 2 ? ? R e ? ( 0 ? ° ) ? 1.20 , [ Inequality ? ? 1 ] where, in Inequality 1, Re (?°) is in-plane retardation of the compensation film in respective tilting direction at ?° with respect to the direction perpendicular to the optical axis of the compensation film, and Re(450 nm)<Re(550 nm)<Re(650 nm),??[Inequality 2] where, in Inequality 2, Re (450 nm), Re (550 nm) and Re (650 nm) are in-plane retardation of the compensation film in the direction perpendicular to the optical axis of the compensation film for incident light having a wavelength of 450 nanometers, 550 nanometers and 650 nanometers, respectively.
    Type: Grant
    Filed: April 28, 2017
    Date of Patent: July 28, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ju Hyun Kim, Hyunseok Choi, Sangah Gam
  • Patent number: 10705385
    Abstract: An optical layered body including a substrate layer, and an optically anisotropic layer containing at least one liquid crystal cured layer, wherein a light transmittance of the substrate layer at a wavelength of 390 nm is 1% or less, and an in-plane retardation Re0(450) at a wavelength 450 nm before the optical layered body is exposed to the xenon lamp, an in-plane retardation Re0(550) at a wavelength 550 nm before the optical layered body is exposed to the xenon lamp, an in-plane retardation Re300(450) at the wavelength 450 nm after the optical layered body was exposed to the xenon lamp for 300 hours, and an in-plane retardation Re300(550) at the wavelength 550 nm after the optical layered body was exposed to the xenon lamp for 300 hours satisfy the following formulae (1) and (2): 0.95?Re300(450)/Re0(450)?1.05??(1), 0.95?Re300(550)/Re0(550)?1.05??(2).
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: July 7, 2020
    Assignee: ZEON CORPORATION
    Inventors: Hiromasa Hashimoto, Masakazu Saito
  • Patent number: 10690839
    Abstract: The present invention provides a reflective polarizing module for enabling bending reduction, comprising: a reflective polarizing sheet having a cooling surface in which a plurality of stacks having different refractive indices from each other are laminated to selectively transmit light and which is cooled by being in contact with a separate cooling roll in a heated state, and an outer exposed surface which is placed in a stacked form on an upper portion of the cooling surface and is exposed to air to thereby slowly cool, wherein the reflective polarizing sheet has a shrinkage rate of the cooling surface by means of a temperature rise which is relatively higher than the shrinkage rate of the outer exposed surface; and an adhesive layer which is provided to at least any one of the cooling surface or the outer exposed layer to thereby bond a separate optical module and the reflective polarizing sheet, and reduce shrinkage and bending of the reflective polarizing sheet according to a temperature rise due to a sh
    Type: Grant
    Filed: June 8, 2016
    Date of Patent: June 23, 2020
    Assignee: LMS Co., Ltd.
    Inventors: Eun Mi Lee, Jang Hee Cho
  • Patent number: 10551539
    Abstract: Provided are a polarizing plate and a display. The illustrative polarizing plate may exhibit desired characteristics in a wide range of wavelengths, and have excellent reflection and visibility at an inclined angle. For example, the polarizing plate may be used in a reflective or transflective liquid crystal display or an organic light emitting device.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: February 4, 2020
    Assignee: LG CHEM, LTD.
    Inventors: Byoung Kun Jeon, Moon Soo Park, Hyuk Yoon
  • Patent number: 10504829
    Abstract: A semiconductor package includes a substrate having a top surface on which a semiconductor chip is mounted and a bottom surface opposite the top surface, an upper metal pattern including an upper connection region to which an external electrical device is connected and a chip connection region to which the semiconductor chip is connected, a lower metal pattern including a lower connection region to which other external electrical device is connected, and an intermediate metal pattern electrically connecting the upper and lower metal patterns. The upper metal pattern provides at least three groups of inner leads. The lower metal pattern provides at least three groups of outer leads. A module, such as that of a display device, may include the semiconductor package.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: December 10, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jeong-Kyu Ha
  • Patent number: 10466524
    Abstract: A window is provided that includes a first substrate, a second substrate spaced apart from the first substrate, an intermediate substrate between the first and second substrate and having a first transparent electrode on a surface proximal to the first substrate and second transparent electrode on a surface proximal to the second substrate, a first electrode on a surface of the first substrate proximal to the intermediate substrate, a second electrode on a surface of the second substrate proximal to the intermediate substrate, a light absorbing layer comprising an electrochromic medium between the first substrate and the intermediate substrate, and a light scattering layer comprising a liquid crystal material between the intermediate substrate and the second substrate.
    Type: Grant
    Filed: February 29, 2016
    Date of Patent: November 5, 2019
    Assignee: GENTEX CORPORATION
    Inventors: William L. Tonar, Henry A. Luten, George A. Neuman, John S. Anderson, Gary J. Dozeman, Tammy G. Morgan
  • Patent number: 10247979
    Abstract: The present invention pertains to a polarizing film having a transparent layer on at least one surface of a polarizer, wherein: the polarizer contains a polyvinyl alcohol-based resin and has a thickness of 15 ?m or less; the transparent layer-side of the polarizer has a compatible layer thereon having compatibility with the transparent layer; and the thickness A of the polarizer and the thickness B of the compatible layer satisfy the general formula (100×B/A)?1. This polarizing film has crack resistance and suppresses changes in the dimensions of the polarizer.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: April 2, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Satoshi Mita, Tomonori Ueno, Yusuke Motegi, Jingfan Xu, Atsushi Kishi
  • Patent number: 10209416
    Abstract: Provided are a polarizing plate and a display. The illustrative polarizing plate may exhibit desired characteristics in a wide range of wavelengths, and have excellent reflection and visibility at an inclined angle. For example, the polarizing plate may be used in a reflective or transflective liquid crystal display or an organic light emitting device.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: February 19, 2019
    Assignee: LG CHEM, LTD.
    Inventors: Byoung Kun Jeon, Moon Soo Park, Hyuk Yoon
  • Patent number: 10082700
    Abstract: An antireflection film includes a polarizer, a first phase delay layer, and a second phase delay layer, where at least one of the first phase delay layer and the second phase delay layer includes a liquid crystal layer, and the liquid crystal layer includes liquid crystals oriented in a direction tilting obliquely with respect to a surface thereof.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: September 25, 2018
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Tsuyoshi Ohyama, Koh Kamada, Eun Sung Lee
  • Patent number: 10001653
    Abstract: A spatial image display apparatus includes a display element including a plurality of pixels which are two-dimensionally arranged, and an imaging device that has a substrate including a plurality of dihedral corner reflectors arranged, the display element is disposed in a first space on one main surface of the substrate, and the imaging device forms a real image of a display image by the display element, in a second space on the other main surface of the substrate. The plurality of pixels are arranged in a period corresponding to a frequency that is equal to or less than a minimum spatial frequency at which an MTF value relative to a spatial frequency of the imaging device is minimized.
    Type: Grant
    Filed: March 18, 2015
    Date of Patent: June 19, 2018
    Assignee: Sony Corporation
    Inventor: Isamu Nakao
  • Patent number: 9995965
    Abstract: In an FFS liquid crystal display device, viewing angle characteristics are further improved. In an FFS liquid crystal display device, the alignment axis of a first alignment film of a first substrate and the alignment axis of a second alignment film of a second substrate are directed in the same direction. At least two of an upper polarizer, a lower polarizer, or a retardation plate 160 satisfy conditions below. (1) The absorption axis of the upper polarizer forms an angle of one to 45 degrees inclusive with the alignment axis. (2) The absorption axis of the lower polarizer forms an angle of 91 to 135 degrees inclusive or forms an angle of 45 to 89 degrees inclusive with the alignment axis. (3) The extension axis of the retardation plate 160 forms an angle of one to 45 degrees inclusive with the alignment axis.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: June 12, 2018
    Assignee: Japan Display Inc.
    Inventors: Masaki Nishikawa, Tetsuya Ooshima
  • Patent number: 9933654
    Abstract: A polarizer for use in an IPS-LCD includes: a polarizing element; and a retardation film laminate attached to a surface of the polarizing element. The retardation film laminate includes a combination of a +B film and a ?B film or a combination of a +B film and a +A film.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: April 3, 2018
    Assignee: LG CHEM, LTD.
    Inventors: Jun Won Chang, Moon Soo Park
  • Patent number: 9921347
    Abstract: An alignment film capable of reducing occurrence of alignment disorder in a simple manner, a method of manufacturing the alignment film, a retardation film, a method of manufacturing the retardation film, and a display are provided. An alignment film is configured of an anchor layer and an alignment layer stacked in this order on a base. The alignment layer includes a groove region having a plurality of fine grooves on a surface thereof, and a groove region having a plurality of fine grooves on a surface thereof. The anchor layer provided between the base and the alignment layer is provided with an antistatic function in addition to a function of bringing the alignment layer into close contact with the base.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 20, 2018
    Assignee: Saturn Licensing LLC
    Inventors: Akito Kuriyama, Eiki Ohyanagi, Junichi Inoue, Kei Obata
  • Patent number: 9921351
    Abstract: An optical film includes: a polarization layer; a first phase retardation layer having an optic axis at an angle in a range from about 17 degrees to about 27 degrees or from about ?27 degrees to about ?17 degrees with respect to a transmission axis of the polarization layer; and a second phase retardation layer having an optic axis at an angle in a range from about 85 degrees to about 95 degrees with respect to the transmission axis of the polarization layer. The polarization layer, the first phase retardation layer, and the second phase retardation layer are deposited in sequence, the first phase retardation layer is a half-wave plate, the second phase retardation layer is a quarter-wave plate, and out-of-plane retardation values of the first phase retardation layer and the second phase retardation layer for incident light having the standard wavelength have opposite signs.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: March 20, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CHEIL INDUSTRIES, INC.
    Inventors: Kyu Yeol In, Hee Kyung Kim, Won Cheol Jung, Hyung Jun Kim, Kyoung Ah Oh, Moon Yeon Lee, Myung Sup Jung
  • Patent number: 9891359
    Abstract: An optical film including a polarization layer, a first phase delay layer positioned on a side of the polarization layer and including a liquid crystal, and a second phase delay layer positioned on a side of the first phase delay layer, where the first phase delay layer has an optical axis defining an angle of about 17 degrees to about 27 degrees or about ?27 degrees to about ?17 degrees relative to a transmissive axis of the polarization layer, and the second phase delay layer has an optical axis defining an angle of about 85 degrees to about 95 degrees relative to the transmissive axis of the polarization layer.
    Type: Grant
    Filed: April 27, 2014
    Date of Patent: February 13, 2018
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CHEIL INDUSTRIES INC.
    Inventors: Hyung Jun Kim, Kyoung Ah Oh, Moon Yeon Lee, Myung Sup Jung
  • Patent number: 9791734
    Abstract: An LCD module includes an LCD panel, and a polarizing plate formed on each of the upper and lower surfaces of the LCD panel. The polarizing plate includes a polarizer and a polyester film formed on at least one surface of the polarizer. The polyester film has a difference between the index of refraction in the x-axis direction and the index of refraction in the z-axis direction (nx?nz) of about 0.1 to about 0.18, where nx and nz are the indices of refraction in the x-axis and z-axis directions, respectively, at a wavelength of 550 nm. The LCD module has a CR 45° and a CR 135° of about 1.0% or greater.
    Type: Grant
    Filed: July 10, 2015
    Date of Patent: October 17, 2017
    Assignee: SAMSUNG SDI CO., LTD.
    Inventors: Yeon Ju Jung, Ae Kyoung Kim, Han Su Kim, Kwang Ho Shin, Dong Yoon Shin
  • Patent number: 9746724
    Abstract: A liquid crystal display device includes a display panel including: a lower display substrate on which a plurality of pixel electrodes are disposed in a matrix and data lines extend in a column direction between adjacent pixel electrodes; an upper display substrate on which a common electrode is disposed; and a liquid crystal layer disposed between the lower display substrate and the upper display substrate and including liquid crystal molecules. The display panel includes a plurality of unit pixels, each unit pixel including pixels having different colors, and each pixel including one of the pixel electrodes. A gap between neighboring unit pixels is larger than a gap between neighboring pixel electrodes within each unit pixel, and a data line positioned between the neighboring unit pixels has a portion having a width larger than that of a data line positioned between the neighboring pixel electrodes within each unit pixel.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: August 29, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ki Kyung Youk, Hyun-Ho Kang, O Sung Seo, Seung Jun Yu, Ha Won Yu, Yeo Geon Yoon, Sang-Myoung Lee, Tae Kyung Yim
  • Patent number: 9709701
    Abstract: A polycarbonate resin film of the present invention is formed from a polycarbonate resin which contains at least a constitutional unit derived from a dihydroxy compound having a bonded structure represented by the following structural formula (1) and satisfies the following expression (2) when subjected to a tensile test at a standard stretching temperature for the polycarbonate resin and at a pulling speed (strain rate) of 1,000%/min. [Chem. 1] CH2—O??(1) (No hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).) 0.9?[(lower yield stress in tension)/(upper yield stress in tension)]?1??(2).
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: July 18, 2017
    Assignees: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATION
    Inventors: Tomohiko Tanaka, Michiaki Fuji, Nao Murakami, Takashi Shimizu
  • Patent number: 9678245
    Abstract: A polycarbonate resin film of the present invention is formed from a polycarbonate resin which contains at least a constitutional unit derived from a dihydroxy compound having a bonded structure represented by the following structural formula (1) and satisfies the following expression (2) when subjected to a tensile test at a standard stretching temperature for the polycarbonate resin and at a pulling speed (strain rate) of 1,000%/min. [Chem. 1] CH2—O??(1) (No hydrogen atom is bonded to the oxygen atom contained in the structural formula (1).) 0.9?[(lower yield stress in tension)/(upper yield stress in tension)]?1??(2).
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: June 13, 2017
    Assignees: MITSUBISHI CHEMICAL CORPORATION, NITTO DENKO CORPORATION
    Inventors: Tomohiko Tanaka, Michiaki Fuji, Nao Murakami, Takashi Shimizu
  • Patent number: 9639229
    Abstract: A display device with a touch panel includes the touch panel having a first substrate having a detection area to detect a coordinate and an outside area in which at least one external terminal is formed, a plurality of first lines to detect the coordinate in the detection area, a plurality of second lines to detect the coordinate in the detection area, wherein each of the plurality of first lines traverse each of the plurality of second lines. An organic emitting display panel is arranged under the touch panel, and a circular polarizing plate arranged at a side of the touch panel opposite to the organic emitting display panel. The organic emitting display panel, the touch panel, and the circular polarizing plate are arranged in this order.
    Type: Grant
    Filed: December 29, 2015
    Date of Patent: May 2, 2017
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Takeshi Ookawara, Noriharu Matsudate
  • Patent number: 9623441
    Abstract: It is an object of the invention to provide a method for manufacturing a long laminated polarizing plate having a long polarizing coating formed by coating directly on a long retardation film and to provide such a long laminated polarizing plate. The present invention relates to a method for manufacturing a long laminated polarizing plate comprising a long retardation film having a slow axis in its longitudinal direction and a long polarizing coating placed on the retardation film and having an absorption axis or a transmission axis in an in-plane direction at an angle of 25 to 65° to the slow axis direction of the long retardation film.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: April 18, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Shoichi Matsuda, Yoshiaki Asanoi, Tadayuki Kameyama
  • Patent number: 9594275
    Abstract: The present application provides a retardation element, having a first birefringent layer; and a second birefringent layer which has approximately the same average thickness as that of the first birefringent layer and contacts the first birefringent layer such that an angle formed between a first line segment representing the principal axis of refractive index anisotropy of the first birefringent layer and a second line segment representing the principal axis of refractive index anisotropy of the second birefringent layer is neither 0° nor 180° when the first line segment and the second line segment are projected on the transparent substrate such that an end A of the first line segment at a side of the transparent substrate and an end B of the second line segment at a side of the transparent substrate coincide with each other.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: March 14, 2017
    Assignee: DEXERIALS CORPORATION
    Inventors: Nobuyuki Koike, Akio Takada, Naoki Hanashima
  • Patent number: 9520075
    Abstract: An image processing method and apparatus using the image processing method are provided. The apparatus comprises a processor configured to scale color values of input image data, thereby simulating the optical characteristics of paper. The simulation takes into consideration varying ambient light conditions around the display to imitate the optical characteristics of physical paper in the same ambient light conditions.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: December 13, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: Byoungchul Cho, Namyong Gong, Sangjae Park
  • Patent number: 9436024
    Abstract: To acquire a fine viewing angle property from oblique view fields in a lateral electric field type liquid crystal display device having liquid crystal initial alignment directions in two orthogonal directions. The absorption axis of the incident-side polarization plate and the absorption axis of the exit-side polarization plate are orthogonal to each other in both of the region I and the region II, and the liquid crystal layer, the in-cell retarder as an optical compensation layer, the A-plate, and the C-plate sandwiched therebetween are in parallel to either one of the absorption axes or orthogonal to the substrates. Therefore, the transmittance can be suppressed to be low and a fine black display can be acquired even when the display surface is viewed from the oblique view fields.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: September 6, 2016
    Assignee: NLT TECHNOLOGIES, LTD
    Inventors: Shinichi Nishida, Hidenori Ikeno, Hideki Ito, Mitsuhiro Sugimoto
  • Patent number: 9279928
    Abstract: Provided is a retardation element, including: a transparent substrate; and a birefringent multilayer structure formed of layered structures stacked over the transparent substrate and each formed of first and second birefringent layers. In each layered structure, a relationship between average thicknesses (t1) and (t2) of the first and second birefringent layers satisfies any of formulae (1) and (2) below, and an angle (?) formed between first and second line segments representing principal axes of refractive index anisotropy of the first and second birefringent layers satisfies formula (3) below when the first and second line segments are projected on the transparent substrate such that an end A of the first line segment and an end B of the second line segment at a side of the transparent substrate coincide with each other, and condition (4) is satisfied, 0<t1/t2?1??formula (1) 0<t2/t1?1??formula (2) 90°<??180°??formula (3) t1?t2 or ??180°??condition (4).
    Type: Grant
    Filed: October 21, 2014
    Date of Patent: March 8, 2016
    Assignee: DEXERIALS CORPORATION
    Inventor: Nobuyuki Koike
  • Patent number: 9188809
    Abstract: The present invention discloses a liquid crystal display and a method of optical compensation thereof. Specifically, the present invention adjusts compensation values of a uniaxial positive birefringence A-Plate and a uniaxial negative birefringence C-Plate, especially a value range of retardation in a thickness direction Rth of the uniaxial negative birefringence C-Plate is controlled. By adjusting the compensation values of the above-mentioned two types of compensation films, the dark-state light leakage phenomenon is suppressed. The present invention is capable of suppressing the dark-state light leakage phenomenon at a large viewing angle effectively and increasing the contrast and clarity at a large viewing angle.
    Type: Grant
    Filed: July 11, 2013
    Date of Patent: November 17, 2015
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO. LTD.
    Inventors: Chihtsung Kang, Bo Hai
  • Patent number: 9110242
    Abstract: This invention relates to a transmissive liquid crystal display including a light source (BL), a reflective linearly-polarizing layer (Pr1), a birefringent layer (A) having specific optical properties and specific retardation properties, a light source-side absorptive linearly-polarizing layer (P1), a liquid crystal cell (LC), and a viewer-side linearly-polarizing layer (P2) which are arranged in this order. In the transmissive liquid crystal display of the invention, light leakage is suppressed in oblique directions so that black brightness can be reduced. A reduction in contrast in the normal direction can also be suppressed, which is caused by the distribution of light to the normal direction.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: August 18, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Minoru Miyatake, Taku Yamada, Kuniaki Ishibashi
  • Patent number: 9081231
    Abstract: A vertical alignment mode liquid crystal display comprising: a liquid crystal cell; a first polarizer; a second polarizer; a first optical film arranged between the first polarizer and the liquid crystal cell; and a second optical film arranged between the liquid crystal cell and the second optical film, wherein the first and the second optical films each are a resin film having an optically biaxial property, the first and the second optical films meet: Formula (1) Ro1>Ro2; Formula (2) Rth1<Rth2; Formula (3) DSPRo1<DSPRo2; and Formula (4) DSPRth1<DSPRth, wherein Ro1 and Ro2 represent in-plane retardation values of the first and the second optical films, respectively, Rth1 and Rth2 represent retardation values in the thickness direction of the first and the second optical films, respectively, and DSPRo1, DSPRo2, DSPRth1 and DSPRth2 represent wavelength dispersion properties of Ro1, Ro2; Rth1 and Rth2, respectively.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: July 14, 2015
    Assignee: KONICA MINOLTA OPTO, INC.
    Inventors: Kentaro Yano, Shigeki Oka, Ayako Inagaki, Yuki Kaneko
  • Publication number: 20150146142
    Abstract: The present invention relates to liquid crystal display technology, and provides an optical compensation film for a liquid crystal display, including a first polarizer and a second polarizer disposed on both sides of the liquid crystal panel respectively, and an A-plate and a C-plate arranged between the liquid crystal panel and the first polarizer or between the liquid crystal panel and the second polarizer, wherein the in-plane compensation value for optical path difference of the A-plate RoA-plate lies in the range of [92, 184]nm, the compensation value for optical path difference in the thickness direction of the A-plate RthA-plate lies in the range of [46, 92]nm. The dark-state light leakage distribution and the contrast ratio of the display are improved through the optical compensation film according to the invention. The invention further provides a liquid crystal display including an optical compensation film.
    Type: Application
    Filed: January 21, 2014
    Publication date: May 28, 2015
    Inventors: Chih-Tsung Kang, Bo Hai
  • Patent number: 9040115
    Abstract: Disclosed is a negative C-type retardation compensator for a liquid crystal display. The negative C-type retardation compensator for the liquid crystal display includes polyarlate having a thio group or a sulfur oxide group in a polymer main chain thereof. Accordingly, the retardation compensator has an absolute value of negative retardation that is larger in a thickness direction that a retardation compensator which includes polyarylate having no thio group or sulfur oxide group in a polymer main chain thereof even though the retardation compensator having the thio group or sulfur oxide group and the retardation compensator having no thio group or sulfur oxide group are the same as each other in thickness. Thereby, the negative C-type retardation compensator for liquid crystal displays is capable of being desirably applied to the liquid crystal displays.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: May 26, 2015
    Assignees: LG Chem, Ltd., IUCF-HYU (Industry-University Cooperation Foundation Hanyang University
    Inventors: Hee-Jung Kim, Dong-Ryul Kim, Ho-Jun Lee, Sang-Uk Ryu, Hyo-Sun Lee, Boong-Goon Jeong, Dae-Woo Nam, Ju-Eun Cha
  • Patent number: 9030643
    Abstract: A liquid crystal prism element includes: a first prism array; a second prism array arranged so as to face the first prism array; and a liquid crystal layer provided between the first and second prism arrays. The first prism array is composed of a plurality of first prisms that have ridge lines extending in a Y axis direction and are arranged so as to be spaced apart from each other at predetermined intervals in an X axis direction The second prism array is composed of second prisms that have ridge lines extending in the Y axis direction and are arranged so as to be spaced apart from each other at predetermined intervals in the X axis direction. Each first prism has an inclined surface facing a center side of the liquid crystal layer. Each second prism has an inclined surface facing the center side of the liquid crystal layer.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: May 12, 2015
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventor: Katsuhiko Hayashi
  • Patent number: 9019451
    Abstract: A liquid crystal display (LCD) device includes a birefringent layer that satisfies the relationship nx>ny?nz and may be considered a first-class birefringent layer, a birefringent layer that satisfies the relationship nx<ny?nz may be considered a second-class birefringent layer, and a birefringent layer that satisfies the relationship nx?ny?nz may be considered a third-class birefringent layer. The LCD may include a first polarizer, a first first-class birefringent layer whose in-plane phase difference is adjusted to a quarter wave, an LC cell, a second first-class birefringent layer whose Nz factor is substantially the same as the first first-class birefringent layer and whose in-plane phase difference is adjusted to a quarter wave, a second-class birefringent layer, and a second polarizer which may be stacked in this order.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: April 28, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Akira Sakai, Kazuyoshi Sakuragi, Masahiro Hasegawa
  • Patent number: 9019452
    Abstract: The present invention discloses a compensation system and a liquid crystal display apparatus used for a liquid crystal panel. The compensation system comprises a first biaxial retardation film and a second biaxial retardation film respectively disposed on either side of the liquid crystal panel. An in-plane retardation value of the first biaxial retardation film at a wavelength of 550 nm is Ro1. An out-of-plane retardation value in a thickness direction is Rth1. An in-plane retardation value of the second biaxial retardation film at the wavelength of 550 nm is Ro2. An out-of-plane retardation value in a thickness direction is Rth2. Wherein: 30.8 nm?Ro1?91 nm; 70.4 nm?Rth1?208 nm; 21 nm?Ro2?93.8 nm; Y1?Rth2?Y2; Y1=0.00424817×Rth12?1.9854256×Rth1+277.7: Y2=?0.003333×Rth12?0.033459×Rth1+234.2. The present invention effectively reduces light leakage of the liquid crystal panel in dark mode by disposing the double-layered biaxial retardation films having reasonable retardation values.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: April 28, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Chih-tsung Kang, Bo Hai
  • Patent number: 8995056
    Abstract: A laminated optical film which exhibit a high front contrast ratio and even brightness, improve viewing angle characteristics of a liquid crystal display of a horizontal alignment mode, and have high durability. A laminated optical film comprising: a B layer; and a C layer, wherein the B layer satisfies the following three formulae (Ib) to (IIIb), the C layer satisfies the following two formulae (Ic) and (IIc), and the absolute value |?SP value| of a difference in SP value between the primary components of the B and C layers is not more than 1.5, the SP value being determined by Hoy's method. 1.0?Nz?3.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: March 31, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Jun Takeda, Masato Nakao
  • Patent number: 8974875
    Abstract: A cellulose acylate film containing a cellulose acylate and a specific polymer, the specific polymer containing a repeating unit derived from a monomer represented by formula (1): wherein R1 represents a hydrogen atom or an aliphatic group having 1 to 4 carbon atoms; R2 represents a substituent; (A) represents an atomic group necessary to form a 5- or 6-membered ring; and n represents an integer of 0 to 4.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: March 10, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Yutaka Nozoe, Akio Tamura, Yu Naito
  • Publication number: 20150062505
    Abstract: Provided is an optically anisotropic sheet that gives a thin optically anisotropic film that can be transferred to a display device. The optically anisotropic sheet includes a substrate, a liquid crystal cured film, and a sticky adhesive layer in this order. The liquid crystal cured film is a film that has a thickness of 5 ?m or less and is cured with a polymerizable liquid crystal compound aligned. The sticking force (El) between the liquid crystal cured film and the sticky adhesive layer is greater than the substrate sticking force (F4).
    Type: Application
    Filed: August 7, 2014
    Publication date: March 5, 2015
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Nobuyuki HATANAKA, Tadahiro KOBAYASHI, Akira YOKOTA, Tatsuaki KASAI
  • Patent number: 8970813
    Abstract: The present invention provides an optical compensation film group and a method for reducing light leakage of a vertical alignment LCD using the same. For the vertical alignment LCD at a wavelength of 550 nm, an LC?nd in the range of [305.8 nm, 324.3 nm], and a pretilt angle in the range of [85°, 90°), a compensation value Ro of an in-plane optical path difference of the biaxial compensation film is in the range of 48 nm?Ro?84 nm, and a compensation value Rth of an out-of-plane optical path difference of the biaxial compensation film is in the range of 160 nm?Rth?280 nm, and a TAC compensation film having a compensation value Rth is in the range of Y1?Rth?Y2. The present invention can effectively improve the serious light leakage caused by the conventional compensation structure with a single biaxial compensation film, the contrast and sharpness at the large viewing angles, and the costs.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: March 3, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chih-Tsung Kang, Bo Hai
  • Patent number: 8962108
    Abstract: A liquid crystal display panel includes a liquid crystal cell, a first polarizing plate placed on one side of the liquid crystal cell, a second polarizing plate placed on the other side of the liquid crystal cell, a retardation film placed between the liquid crystal cell and the first polarizing plate, and a pressure-sensitive adhesive layer placed between the liquid crystal cell and the retardation film, wherein the first and second polarizing plates have absorption axes whose directions are substantially orthogonal to each other, the retardation film is a norbornene resin-containing stretched film and has a refractive index ellipsoid satisfying the relation nx?nz>ny, and the pressure-sensitive adhesive layer includes a pressure-sensitive adhesive that may be produced by crosslinking a composition including a (meth)acrylate (co)polymer and a crosslinking agent including a peroxide as a main component.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: February 24, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Yuusuke Toyama, Masayuki Satake, Kenji Yoda, Kentarou Kobayashi, Shuuji Yano
  • Patent number: 8961845
    Abstract: The present invention provides an optical compensation film, which has excellent visibility such as light leakage, uneven color tone and front contrast, and can simultaneously realize retardation and wavelength dispersion. The optical compensation film is characterized by containing a cellulose ester, the following polymer (a), and the following compound (b). (a) A polymer produced by copolymerizing an ethylenically unsaturated monomer having in its molecule a partial structure represented by Formula (1) with at least one ethylenically unsaturated monomer. (b) An esterified compound produced by esterifying all or a part of OH groups in a compound (A) having one furanose structure or one pyranose structure, or an esterified compound produced by esterifying all of or a part of OH groups in a compound (B) containing nor less than 2 and not more than 12 structures of at least one of a furanose structure or a pyranose structure.
    Type: Grant
    Filed: June 28, 2013
    Date of Patent: February 24, 2015
    Assignee: Konica Minolta Opto, Inc.
    Inventor: Takashi Sera
  • Patent number: 8958034
    Abstract: A liquid crystal display includes a liquid crystal panel, a polarizing plate on a surface of the liquid crystal panel and having a polarizing axis; and a compensation film between the liquid crystal panel and the polarizing plate, and having an optical axis at which light passes through the compensation film. When a surface of the compensation film is referred to as a x-y plane, a plane passing through an x-axis and vertical to the optical axis of the compensation film is referred to as an x-y? plane. A first retardation value (Ro?) of the compensation film is (nx?ny?)d, and a second retardation value (Rth?) is [(nx+ny?)/2?nz?]d, and the first and second retardation values (Ro?) and (Rth?) satisfy the following Formula of 0.92?Rth?/Ro??4.75, where ‘n’ denotes a refractive index and ‘d’ denotes a thickness of the compensation film in a z-axis direction.
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: February 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Oh Choi, Hee Wook Do, Kyeongha Kim, Duckjong Suh, Tecksoo Kim, Seungbeom Park, Sang-Gu Lee
  • Patent number: 8906475
    Abstract: Provide is a cellulose acylate film, of which the environmental humidity-dependent retardation change is small and which, when stuck to a polarizer and used in high-temperature and high-humidity environments, is effective for preventing the polarizing element from being deteriorated. A cellulose acylate film, which contains a hydrogen-bonding compound satisfying the following requirements (A) to (C), and at least one hydrophobizing agent selected from a polyalcohol ester-base hydrophobizing agent, a polycondensate ester-base hydrophobizing agent and a carbohydrate derivative-base hydrophobizing agent: (A) the compound has both a hydrogen-bonding donor part and a hydrogen-bonding acceptor part in one molecule, (B) the value computed by dividing the molecular weight of the compound by the total number of the hydrogen-bonding donor number and the hydrogen-bonding acceptor number in the compound is from 30 to 65, and (C) the total number of the aromatic ring structures in the compound is from 1 to 3.
    Type: Grant
    Filed: September 29, 2010
    Date of Patent: December 9, 2014
    Assignee: Fujifilm Corporation
    Inventors: Nobutaka Fukagawa, Masato Nagura, Takayasu Yasuda, Takahiro Ohno, Satoshi Tanaka, Aiko Yamamoto, Aiko Yoshida, Shinya Watanabe
  • Patent number: 8908132
    Abstract: Disclosed is a liquid crystal display device that includes: a blue phase mode liquid crystal layer between the first and second substrates, and has an optical anisotropy when an electric field is applied and not applied; polarizing plates on outer surfaces of first and second substrates, respectively; and one of a first optical compensation film including a +C plate, and a second optical compensation film including a biaxial phase retardation layer, between the polarizing plate and the liquid crystal panel.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: December 9, 2014
    Assignee: LG Display Co., Ltd.
    Inventor: Sang-Wook Lee
  • Patent number: 8902398
    Abstract: Provided is an optical film laminate with a thinner thickness having an optical compensation function. According to the present invention is provided an optical film laminate comprising (i) a positive C plate comprising a liquid crystal material having a photosensitive group and (ii) a positive A plate, an optically biaxial plate, or an O plate, these plate comprising a liquid crystal material having a photosensitive group; wherein the both plates are directly bonded with each other to be firmly laminated without adhesive.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: December 2, 2014
    Assignee: Hayashi Engineering Inc.
    Inventor: Takeya Sakai
  • Patent number: 8895118
    Abstract: The present invention relates generally to the field of organic chemistry and particularly to the nematic lyotropic liquid crystal solution and negative dispersion retardation plate for application in 3D liquid crystal displays. The negative dispersion retardation plate comprises a substrate, and at least one optically anisotropic retardation layer comprising a multi-component guest-host composition coated onto the substrate.
    Type: Grant
    Filed: November 6, 2011
    Date of Patent: November 25, 2014
    Assignee: Crysoptix K.K.
    Inventors: Arthur Geivandov, Pavel Ivan Lazarev, Serguei Palto
  • Patent number: 8871314
    Abstract: Provided is a polymer film containing at least one of a compound represented by formula (1) of hydrates, solvates, or salts thereof. Y is a methine group or nitrogen atom. Qa, Qb, and Qc are a single bond or a divalent linking group. Ra, Rb, and Rc, are hydrogen atom, alkyl group, alkenyl group, alkynyl group, aryl group, cyano group, halogen group, or heterocyclic group. X2 is a single bond or a divalent linking group. X1 is a single bond or a predetermined divalent linking group. R1 and R2 are a hydrogen atom, alkyl group, alkenyl group, alkynyl group, aryl group, or heterocyclic group.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: October 28, 2014
    Assignee: FUJIFILM Corporation
    Inventors: Aiko Yamamoto, Satoshi Tanaka, Teruki Niori, Masato Nagura, Masaki Noro, Aiko Yoshida, Nobutaka Fukagawa, Yasukazu Kuwayama
  • Patent number: 8865895
    Abstract: The present invention is related to 6,7-dihydrobenzimidazo[1,2-c]quinazolin-6-one derivatives of the general structural formula (I), where X is a carboxylic group COOH, m is 0, 1, 2 or 3; Y is a sulfonic group SO3H, n is 0, 1, 2 or 3; Z is an acid amide group L-NH2; p is 0, 1, 2 or 3; K is a counterion selected from the list comprising H+, NH4+, Na+, K+, Li+, Mg2+, Ca2+, Zn2+, and Al3+; s is the number of counterions providing neutral state of the molecule; R is a substituent selected from the list comprising CH3, C2H5, NO2, Cl, Br, F, CF3, CN, OH, OCH3, OC2H5, OCOCH3, OCN, SCN, NH2, and NHCOCH3; w is 0, 1, 2, 3 or 4; and R1 is a substituent selected from the list comprising H, CH3, C2H5, C3H7, i-C3H7, CH2CH2CH2CH3, CH(CH3)CH2CH3, CH2CH(CH3)CH3 and C(CH3)3 and L is a linking group.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: October 21, 2014
    Assignee: Crysoptix K.K.
    Inventors: Tatyana Doutova, Pavel I. Lazarev, Elena N. Sidorenko
  • Patent number: 8860895
    Abstract: A stereoscopic image display includes a display panel, a first polarizing plate positioned on an upper surface of the display panel, a patterned retarder positioned on the first polarizing plate, a first cellulose triacetate (TAC) film positioned on the patterned retarder, a second polarizing plate positioned on a lower surface of the display panel, and a second TAC film positioned under the second polarizing plate.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: October 14, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Il Jeon, Kyeongjin Kim
  • Patent number: 8852697
    Abstract: Provided is a cellulose acetate film which has excellent retardation properties and exhibits low haze even under high-temperature and high-humidity conditions and which, in an alkaline saponification step, causes little dissolution of the film itself or additives in a saponifying liquid. The cellulose acetate film is characterized by comprising: a cellulose acetate which has an acetyl substitution degree of 2.0 to 2.5; and 5 to 15% by mass (relative to the cellulose acetate) of a component which contains a compound represented by general formula (1) wherein m is 0 and a compound represented thereby wherein in is more than 0 at a ratio of 45:55 to 0:100.
    Type: Grant
    Filed: April 4, 2011
    Date of Patent: October 7, 2014
    Assignee: Konica Minolta Advanced Layers, Inc.
    Inventor: Hideyuki Sato
  • Patent number: RE47725
    Abstract: A display apparatus and a liquid crystal display device are provided. The display apparatus comprises a display device for displaying an image and a diffractive optical element. The diffractive optical element comprises pixel unit regions. Each of the pixel unit regions has a long pixel side and a short pixel side adjacent to each other. The diffractive optical element is disposed on a light emitting side of the display device and comprises first grating regions and second grating regions. The first grating regions have a first diffraction grating. The second grating regions have a second diffraction grating. An azimuth angle of the first diffraction grating is different from an azimuth angle of the second diffraction grating.
    Type: Grant
    Filed: August 26, 2016
    Date of Patent: November 12, 2019
    Assignee: CHENG MEI MATERIALS TECHNOLOGY CORPORATION
    Inventors: Wang-Yang Li, Ting-I Wu