Compensator Or Retarder (i.e., Not Using Liquid Crystal Cell) Patents (Class 349/117)
  • Patent number: 9335585
    Abstract: A liquid crystal display and an optical compensation method therefor are provided specifically for adjusting compensation values of an uniaxial positive birefringence A-compensation film (A-Plate) and an uniaxial negative birefringence C-compensation film (C-Plate) and particularly for controlling a valuing range of a compensation value (Rth) of the C-Plate, so as to reduce the dark-state light leakage by adjusting the compensation values of two types of the compensation film. Thus, the present invention can reduce the dark-state light leakage of a large viewing angle and increase the contrast and definition of the large viewing angle.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: May 10, 2016
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Chihtsung Kang, Bo Hai
  • Patent number: 9324970
    Abstract: An organic light-emitting display apparatus for selectively realizing circular polarization according to external light conditions, including a substrate; an organic light-emitting device on the substrate; a sealing member on the organic light-emitting device; a phase retardation layer on a surface of the substrate, the organic light-emitting device, or the sealing member; and a linear polarization layer on another surface of the substrate, the organic light-emitting device, or the sealing member, wherein the linear polarization layer is located to be closer to a source of external light than the phase retardation layer, and wherein the linear polarization layer comprises a photochromic material.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: April 26, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventors: Oh-June Kwon, Kwan-Hee Lee, Seung-Yong Song, Young-Seo Choi, Jin-Hwan Jeon, Sun-Young Jung, Ji-Hun Ryu, Young-Cheol Joo
  • Patent number: 9316843
    Abstract: A stereoscopic image recognition apparatus is provided and includes a liquid crystal display I and a time division image display shutter II. The liquid crystal display I includes a ?/4 plate A in a protection region for a the display side polarizing plate, the protection region being a region on the display side of a polarizer of the one of the polarizing plate. An angle formed by an absorption axis of the display side polarizing plate and a slow axis of the ?/4 plate A is 35 to 55° or 125 to 145°, and the protection region satisfies |Rth (550)|?160 nm. The time division image display shutter II includes a polarizing plate C between the second liquid crystal cell and the viewer and includes a ?/4 plate B between the polarizing plate C and the liquid crystal display I.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: April 19, 2016
    Assignee: FUJIFILM CORPORATION
    Inventor: Makoto Ishiguro
  • Patent number: 9304240
    Abstract: A method for manufacturing phase retarder film includes steps of providing a substrate; forming an alignment layer on the substrate, the alignment layer having at least a first phase region, at least a second phase region and at least a third phase region, the third phase region being disposed between the first phase region and the second phase region, and a phase retardation of the third phase region being different from phase retardations of the first phase region and the second phase region. The phase retardation of the first phase region is different from the phase retardation of the second phase region.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: April 5, 2016
    Assignee: AU OPTRONICS CORP.
    Inventors: Wen-Fang Sung, Wang-Shuo Kao, Chih-Wei Chen
  • Patent number: 9285601
    Abstract: A light source unit (110) emits linearly polarized laser light of a given wavelength. A wave plate (121) transmits the laser light emitted from the light source unit (110) and has a phase delay axis of which the direction is adjusted to about 0 degrees with respect to the polarization direction (101) of the laser light. A liquid crystal cell (123) transmits laser light that has passed through the wave plate (121) and by a switchable rotation amount, rotates the polarization direction (101) of the laser light transmitted through the liquid crystal cell (123). A wave plate (125) transmits laser light that has passed through the liquid crystal cell (123); and further has a phase delay axis of which the direction is adjusted to about 0 degrees with respect to the polarization direction (101) of the laser light.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: March 15, 2016
    Assignee: CITIZEN HOLDINGS CO., LTD.
    Inventors: Masafumi Ide, Seiko Kato, Takaaki Takeishi
  • Patent number: 9280017
    Abstract: Embodiments of the present invention provide a liquid crystal display device and a producing method thereof, and relate to the field of liquid crystal display. The liquid crystal display device of the present invention comprises a liquid crystal panel and a first optical compensation structure and a second optical compensation structure located at two sides of the liquid crystal panel, and the second optical compensation structure comprises: a polarizing film layer, a compensation film layer and a biaxial film layer, wherein, the polarizing film layer is located between the compensation film layer and the biaxial film layer; and the biaxial film layer is located between the polarizing film layer and the liquid crystal panel. Through providing the biaxial film layer in the second optical compensation structure, the present invention can effectively correct the color shift generated in the diagonal direction of the liquid crystal panel and improve the product quality.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: March 8, 2016
    Assignees: BOE Technology Group Co., Ltd., Hefei BOE Optoelectronics Technology Co., Ltd.
    Inventor: Kuhyun Park
  • Patent number: 9261732
    Abstract: The invention relates to an optical compensation film for IPS or FFS-mode liquid crystal display devices, having the tilt angle ?[°] not equal to zero, ?[°] being defined as ? giving the minimum value of retardation R[?] which is retardation measured for incident light coming in a direction tilted by ?° from a normal line relative to the film-plane, the direction being in a plane including the direction perpendicular to the in-plane slow axis thereof and the normal line; and having retardation along the thickness direction at a wavelength of 550 nm, Rth(550), not equal to zero.
    Type: Grant
    Filed: January 2, 2014
    Date of Patent: February 16, 2016
    Assignee: FUJIFILM Corporation
    Inventors: Hiroyuki Kaihoko, Tatsuho Nomura, Ryuta Takegami
  • Patent number: 9261745
    Abstract: A phase retarder comprises first and second ?-cells or other tunable birefringent devices arranged optically in series. The phase retardation value of the phase retarder is a difference between the phase retardation values of the first and second ?-cells. Driving circuitry drives the phase retarder to generate a target phase retardation value by: (1) prior to a relaxation period, biasing the ?-cells to produce the target phase retardation value; (2) during the relaxation period, biasing the first ?-cell at a constant bias value; and (3) during the relaxation period, lowering the bias value of the second ?-cell continuously or stepwise to maintain the target phase retardation value for the phase retarder throughout the relaxation period. In some embodiments the operation (2) comprises applying zero bias to the first ?-cell throughout the relaxation period. In some embodiments the operation (1) comprises applying a maximum operational bias to the second ?-cell.
    Type: Grant
    Filed: May 13, 2013
    Date of Patent: February 16, 2016
    Assignee: Kent State University
    Inventors: Hsienhui Cheng, Achintya Bhowmik, Philip J. Bos
  • Patent number: 9234987
    Abstract: A multilayer optical film includes a wave plate having a refractive index profile of nx>ny?nz and a fluoropolymer film comprising a moiety of wherein R1, R2, and R3 are each independently hydrogen atoms, alkyl groups, substituted alkyl groups, or halogens, wherein at least one of R1, R2, and R3 is a fluorine atom, wherein R is each independently a substituent on the styrenic ring, n is an integer from 0 to 5 representing the number of the substituents on the styrenic ring, and wherein nx and ny represent in-plane refractive indices and nz the thickness-direction refractive index of the wave plates; wherein said multilayer optical film has a positive in-plane retardation (Re) and an out-of-plane retardation (Rth) that satisfies the equation of |Rth|<Re/2 throughout the wavelength range of 400 nm to 800 nm.
    Type: Grant
    Filed: November 2, 2012
    Date of Patent: January 12, 2016
    Assignee: Akron Polymer Systems, Inc.
    Inventors: Bin Wang, Ted Calvin Germroth, Thauming Kuo, Frank W. Harris, Dong Zhang, Douglas S. McWilliams, Jiaokai Jing, Xiaoliang Zheng
  • Patent number: 9229273
    Abstract: A reflection type liquid crystal device has: a liquid crystal cell held between a pair of substrates and an optical compensation plate disposed outside the pair of substrates. The optical compensation plate has a first optical axis along the thickness direction thereof. The liquid crystal cell has a pretilt at which a second optical axis of a liquid crystal molecule of the liquid crystal cell is inclined with respect to a plate surface of the liquid crystal cell. The optical compensation plate is tiltable in a first direction in which a standard angle becomes larger, wherein the standard angle is defined as an acute angle between the first optical axis and the second optical axis when the optical compensation plate is located parallel to the plate surface of the liquid crystal cell.
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: January 5, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Akihide Haruyama, Osamu Okumura
  • Patent number: 9229142
    Abstract: Provided is an optical film which is resistant to repelling, bright dots, irregularity, and the use of such an optical film in a liquid crystal display leads to high front contrast, reduced grayscale inversion, and a reduced difference between a front image and an oblique image in grayscale reproducibility and color. The optical film including a first optically anisotropic layer; and a second optically anisotropic layer on the first optically anisotropic layer, wherein the first optically anisotropic layer is a layer of liquid crystal compounds aligned and fixed by polymerization, and the surface tilt angle of molecules of the liquid crystal compound is in a range of 5° to 80° at a site in contact with the second optically anisotropic layer.
    Type: Grant
    Filed: December 26, 2013
    Date of Patent: January 5, 2016
    Assignee: FUJIFILM CORPORATION
    Inventors: Hiroshi Sato, Yukito Saitoh, Mitsuyoshi Ichihashi
  • Patent number: 9223172
    Abstract: A liquid crystal display comprises: first and second panels facing each other; a compensation film and a first polarizer disposed on the first panel, the compensation film having phase retardation characteristics; and a second polarizer having a supporting film disposed on the second panel, the supporting film having phase retardation characteristics. In alternative embodiments, a supporting film is used in place of the compensation film. The supporting film has retardation characteristics.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: December 29, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyeong-Hyeon Kim, Jang-Kun Song
  • Patent number: 9223070
    Abstract: Provided is an optical film which does not undergo the deterioration in front contrast or contrast fluctuations even when used in a VA-type liquid crystal display device having high front contrast or as a polarizing plate protection film. The optical film comprises a cellulose ester resin having high stretching adequacy and having an average acetyl group substitution degree of 2.0-2.6, has a phase difference (Ro) of 30-100 nm, a phase difference (Rth) of 70-400 nm and a film thickness of 15-50 ?m, and is characterized by fulfilling a requirement represented by formula (I). Formula (I): 0.01<S(bs)/S(T)<0.30, in the formula, S(bs) represents the quantity of backscattered light at 590 nm and 25°-85° when the angle of incident light that enters the film is set at 0°, the intensity of scattered light at 590 nm and 25°-85°; and S(T) represents the total quantity of incident light that enters the film.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: December 29, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yasuhiro Watanabe, Ayako Inagaki
  • Patent number: 9217073
    Abstract: A polyester resin composition having improved transparency, flame retardancy and hardness, and a method for preparation thereof are provided. The composition includes organo-modified nanoclay and a phosphorous-based flame retardant added to a polyester resin. The nanoclay is homogeneously dispersed in the polyester by melt compounding.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: December 22, 2015
    Assignees: SAMSUNG ELECTRONICS CO., LTD., SHINIL CHEMICAL INDUSTRY CO., LTD.
    Inventors: Ji Young Lee, In Kim, Yeon Kyoung Jung, Manwar Hussain, Pil Joong Yoon, Keum Suk Seo
  • Patent number: 9216562
    Abstract: The present invention discloses an alignment film and the manufacturing method for liquid crystal display panel. The method comprises preparing a first substrate, a second substrate and a liquid crystal, at least one of the first substrate and the second substrate being provided with an alignment film; the material of the alignment film comprising a solvent and a substance dissolved in the solvent, the substance comprising at least one first polymer, the first polymer comprising a main chain and a side chain; folding the first substrate and the second substrate, and injecting the liquid crystal between the first substrate and the second substrate to form a liquid crystal cell; applying voltage to the liquid crystal cell, and then irradiating the liquid crystal cell with UV light. Through the above way, the present invention can reduce the mura phenomenon in the liquid crystal display panel and improve the display quality.
    Type: Grant
    Filed: October 22, 2013
    Date of Patent: December 22, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Kunchang Yang, Liang Xu
  • Patent number: 9195096
    Abstract: A liquid crystal display apparatus includes a first substrate, a second substrate disposed opposite to the first substrate, a liquid crystal layer and a phase difference compensation film disposed on the first substrate, where the phase difference compensation film includes a fluorine resin.
    Type: Grant
    Filed: March 7, 2014
    Date of Patent: November 24, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Gu Lee, Seung-Beom Park, Na-Young Shin, Jung-Hun Lee, Kyung-Hwan Jeon, Hyo-Sung Hong
  • Patent number: 9188786
    Abstract: An optical compensation film includes: a first layer having positive birefringence; a second layer on the first layer and having negative birefringence; and a third layer on the second layer and having positive birefringence. A retardation value of the optical compensation film for incident light having a wavelength of about 550 nm is about 135 nm to about 145 nm, and a ratio of a thickness of the first layer or of the third layer to a thickness of the second layer is about 1.1 to 2.2.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: November 17, 2015
    Assignees: SAMSUNG ELECTRONICS CO., LTD., CHEIL INDUSTRIES INC.
    Inventors: Moon Yeon Lee, Hee Kyung Kim, Kyu Yeol In, Jae Hyun Kim, Hyung Jun Kim, Won Cheol Jung, Hyeon Ho Choi, Woo Joong Kim, Kyoung Ah Oh
  • Patent number: 9172062
    Abstract: The present invention provides a composite phase retarder and an organic light emitting display apparatus using the same. The organic light emitting display apparatus comprises an organic light emitting display panel and the composite phase retarder. The composite phase retarder comprises a quarter wave (?/4) phase retarder, a polarizer and a pattern retarder stacked in sequence. The present invention can be applicable to display 3D images and enhance a display contrast of the organic light emitting display apparatus.
    Type: Grant
    Filed: September 17, 2012
    Date of Patent: October 27, 2015
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Zan Yang, Chia-Chiang Hsiao
  • Patent number: 9164213
    Abstract: Provided is a polarizing plate that has an excellent viewing angle characteristic and suppresses changes in display characteristics. A polarizing plate of the present invention is used in an organic EL panel, and includes a polarizer (10), a first retardation layer (30), and a second retardation layer (40). The first retardation layer (30) shows a refractive index characteristic of nx>ny?nz, satisfies a relationship of Re(450)<Re(550), and has a water absorption rate of 3% or less. The second retardation layer (40) shows a refractive index characteristic of nz>nx?ny. A laminate of the first retardation layer (30) and the second retardation layer (40) has an Re(550) of from 120 nm to 160 nm and an Rth(550) of from 40 nm to 100 nm.
    Type: Grant
    Filed: June 18, 2013
    Date of Patent: October 20, 2015
    Assignee: NITTO DENKO CORPORATION
    Inventors: Hironori Yaginuma, Takashi Shimizu, Kazuki Uwada, Nao Murakami, Tadashi Kojima, Kentarou Takeda
  • Patent number: 9158158
    Abstract: A liquid crystal display device and a phase compensation method for the same are provided. The liquid crystal display device includes: a lower substrate, an upper substrate opposed to the lower substrate, a first polarizer assembly located on a surface of the lower substrate, a second polarizer assembly located on a surface of the upper substrate and a liquid crystal layer located between the upper substrate and the lower substrate; the first polarizer assembly including a first polarizing plate and a first optical retardation thin film; the second polarizer assembly including a second polarizing plate and a second optical retardation thin film; wherein, the first polarizer assembly further includes a first wave plate; the second polarizer assembly further includes a second wave plate.
    Type: Grant
    Filed: July 16, 2013
    Date of Patent: October 13, 2015
    Assignee: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xuecheng Hou, Ang Xiao, Kai Lu
  • Patent number: 9158143
    Abstract: When a user operates a touch sensor panel having an LCD device outdoors or in a bright environment, light reflecting off the device can create glare. In order to reduce glare, a user can view the device through polarized filters such as polarized sunglasses. Doing so can reduce the visibility of the image displayed on the LCD. A quarter-wave retardation film can be added to the touch sensor panel's LCD device to mitigate these effects by producing circularly polarized light. However, adding a separate quarter-wave retardation film can increase the thickness and cost of manufacturing the touch sensor panel. Embodiments of the present disclosure are directed to a touch sensor panel constructed from a base film having quarter-wave retardation properties that can produce circularly polarized light. Because the base film has the desired optical properties, a separate quarter-wave retardation film may not be needed.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: October 13, 2015
    Assignee: Apple Inc.
    Inventors: Cheng Chen, Siddharth Mohapatra, Lili Huang, John Z. Zhong, Masato Kuwabara
  • Patent number: 9159958
    Abstract: Disclosed is an organic light emitting display device to prevent deterioration of visibility caused by reflection of incident light and color transition at high viewing angle, and improve transmittance, the organic light emitting display device includes an organic light emitting display panel, and an antireflective member adhered to an outer surface of the organic light emitting display panel, the antireflective member including a reactive liquid crystal layer and a polarizer film which are laminated in this order, wherein the reactive liquid crystal layer has a ?/4 retardation with respect to a transmitted light of the polarizer film.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: October 13, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Il Jeon, Jin-Ho Kim
  • Patent number: 9146421
    Abstract: An embodiment of the present invention relates to a liquid crystal display. An upper surface alignment layer in the liquid crystal display is arranged to comprise, in the direction from a color filter substrate to a liquid crystal layer, a first upper surface alignment layer, a color washout compensation film layer and a second upper surface alignment layer; an alignment direction of the color washout compensation film layer is opposite to the pre-alignment direction of the liquid crystal layer. In the technical solution, the color washout compensation film layer is used to rectify the color washout problem occurring when the screen of a liquid crystal display screen of a fringe field switching mode is viewed from both the left side and right sides.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: September 29, 2015
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Hyunsic Choi, Hui Li, Zhiqiang Xu, Jung Mok Jun
  • Patent number: 9128338
    Abstract: A display apparatus includes a transparent display device, a first polarizer on a first surface of the transparent display device, a first retarder between the first polarizer and the first surface of the transparent display device, a second polarizer on a second surface of the transparent display device opposite the first surface, and a conversion retarder between the second polarizer and the second surface of the transparent display device, the conversion retarder being configured to delay a wavelength of the external light within a range from a first phase to a second phase and to transmit the wavelength-delayed light therethrough when power is supplied to the conversion retarder.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: September 8, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Hoon Yim, Young-Woo Song, Jin-Koo Chung
  • Patent number: 9116391
    Abstract: An embodiment of the present invention relates to a liquid crystal display. An upper surface alignment layer in the liquid crystal display is arranged to comprise, in the direction from a color filter substrate to a liquid crystal layer, a first upper surface alignment layer, a color washout compensation film layer and a second upper surface alignment layer; an alignment direction of the color washout compensation film layer is opposite to the pre-alignment direction of the liquid crystal layer. In the technical solution, the color washout compensation film layer is used to rectify the color washout problem occurring when the screen of a liquid crystal display screen of a fringe field switching mode is viewed from both the left side and right sides.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: August 25, 2015
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Hyunsic Choi, Hui Li, Zhiqiang Xu, Jung Mok Jun
  • Patent number: 9116392
    Abstract: A liquid crystal display including a twisted nematic liquid crystal panel and first and second substrates with the twisted nematic liquid crystal panel arranged therebetween. A first biaxial retardation compensation film faces the first substrate and a second biaxial retardation compensation film faces the first biaxial retardation compensation film with the twisted nematic liquid crystal panel arranged therebetween.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: August 25, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Min Oh Choi, Hee Wook Do, Duckjong Suh
  • Patent number: 9110291
    Abstract: Methods and apparatus for combining or separating spectral components by means of a polychromat. A polychromat is employed to combine a plurality of beams, each derived from a separate source, into a single output beam, thereby providing for definition of one or more of the intensity, color, color uniformity, divergence angle, degree of collimation, polarization, focus, or beam waist of the output beam. The combination of sources and polychromat may serve as an enhanced-privacy display and to multiplex signals of multiple spectral components. In other embodiments of the invention, a polychromat serves to disperse spectral components for spectroscopic or de-multiplexing applications.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: August 18, 2015
    Assignees: Massachusetts Institute of Technology, University of Utah Research Foundation
    Inventors: Jose Dominguez-Caballero, Rajesh Menon
  • Patent number: 9096691
    Abstract: Regioselectively substituted cellulose esters having a plurality of aryl-acyl substituents and a plurality of alkyl-acyl substituents are disclosed along with methods for making the same. Such cellulose esters may be suitable for use in optical films, such as optical films having certain Nz values, ?A optical films, and/or +C optical films. Optical films prepared employing such cellulose esters have a variety of commercial applications, such as, for example, as compensation films in liquid crystal displays and/or waveplates in creating circular polarized light used in 3-D technology.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: August 4, 2015
    Assignee: EASTMAN CHEMICAL COMPANY
    Inventors: Charles Michael Buchanan, Michael Eugene Donelson, Elizabeth Guzman-Morales, Peter Borden Mackenzie, Bin Wang
  • 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: 9041897
    Abstract: An optical switch for performing high extinction ratio switching of an optical signal includes a beam polarizing element and one or more optical elements. The optical elements are configured to direct an optical signal along a first or second optical path based on the polarization state of the optical signal as it passes through the optical elements. The optical switch performs high extinction ratio switching of the optical signal by preventing unwanted optical energy from entering an output port by using an absorptive or reflective optical element or by directing the unwanted optical energy along a different optical path.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: May 26, 2015
    Assignee: II-VI Incorporated
    Inventors: Haijun Yuan, Xuehua Wu, Christopher Lin, Giovanni Barbarossa
  • Patent number: 9036118
    Abstract: A method for preparing a negative optical compensation assembly includes: first providing an alignment chamber composed of a vertical alignment substrate and a horizontal alignment substrate and filling into the alignment chamber a liquid crystal mixture comprising a polymerizable discotic liquid crystal, an adjunct alignment agent, and an ultraviolet absorption pigment, and subjecting the vertical alignment substrate to ultraviolet radiation so as to polymerize the polymerizable discotic liquid crystal within the alignment chamber, thereby obtain the negative optical compensation assembly. This method can obtain hybrid alignment of discotic liquid crystal via a simple process, and therefore reduce the complexity for manufacturing the negative optical compensation assembly.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: May 19, 2015
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Xiaopeng Cui
  • Patent number: 9034218
    Abstract: An object of this invention is to provide a cellulose ester film which satisfies the requirement 0.95<plasticizer content of A surface/plasticizer content of B surface<1.05, provided that A surface represents one surface of the cellulose ester film and B surface represents the other surface, has a high sound velocity of the film and is excellent in light leakage and color unevenness, and a film-forming method of this cellulose ester film. The cellulose ester film of the present invention, which contains a cellulose ester, is characterized by satisfying the requirement 0.95<plasticizer content of A surface/plasticizer content of B surface<1.05, provided that A surface represents one surface of the cellulose ester film and B surface represents the other surface, and having a sound velocity along at least one of a film transport direction and the lateral direction at 23.° C. 55% RH of 2.0-2.7 km/s.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: May 19, 2015
    Assignee: KONICA MINOLTA OPTO, INC.
    Inventor: Minori Tamagawa
  • 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: 9019450
    Abstract: An optical compensation film for a liquid crystal display is provided and comprises a liquid crystal layer which is disposed on a substrate and has a plurality of first stripe-structure regions with a first thickness and a plurality of second stripe-structure regions with a second thickness, wherein each of the second stripe-structure regions is contiguous to at least one of the first stripe-structure region and the second thickness is greater than the first thickness. The method for manufacturing the optical compensation film is provided.
    Type: Grant
    Filed: May 3, 2012
    Date of Patent: April 28, 2015
    Assignee: Benq Materials Corporation
    Inventors: Meng-Chia Cheng, Lung-Hai Wu, Chen-Kuan Kuo
  • Patent number: 9019438
    Abstract: A 3D image display apparatus featuring a new polarization system is introduced which minimizes crosstalk between stereoimages. The polarization system includes a shutter panel that shifts the phase of an incident light, a polarizing film disposed between the shutter panel and an observer, a first retardation film disposed between the shutter panel and the polarizing film, a second retardation film disposed between the polarizing film and the first retardation film to correspond to the left eye of the observer, and a third retardation film disposed between the polarizing film and the first retardation film to correspond to the right eye of the observer.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: April 28, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang-Gu Lee, Hee Wook Do, Tecksoo Kim, Seungbeom Park, DuckJong Suh, Min Oh Choi
  • Publication number: 20150109557
    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: Application
    Filed: October 21, 2014
    Publication date: April 23, 2015
    Inventor: Nobuyuki Koike
  • Patent number: 9011993
    Abstract: An optical compensation structure and a display device are disclosed. The former comprises a front side polarizer and a rear side polarizer arranged at both sides of a VA liquid crystal unit; the front side polarizer includes a front side polarization unit and a first front side TAC film; the absorption axis of the front side polarization unit is perpendicular to the horizontal normal of the VA liquid crystal unit; the rear side polarizer includes a rear side polarization unit and a biaxial film; and the absorption axis of the rear side polarization unit is parallel to the horizontal normal. The region having serious dark-state light leakage can be transferred from a horizontal viewing angle to a vertical viewing angle, which improves the display effect. Meanwhile, there is no addition of the number of layers of the biaxial film which reduces the cost.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: April 21, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chih-Tsung Kang, Bo Hai
  • Patent number: 9005493
    Abstract: A 3-d stereoscopic viewing lens which the retarder film is made of a PVA film. A 3-D stereoscopic viewing lens having a linear polarized film, one or more lens substrate layers, and an epoxy layer. A process of making retarder film including mounting a PVA film to an assembly line; wetting, cleaning, and washing the PVA film through said assembly line; softening, expanding and stretching the PVA film's x-axis through said assembly line; adding gap filling agent to the PVA film; stretching the PVA film's y-axis through a width frame holder and as a result transforming the PVA film into a retarder film.
    Type: Grant
    Filed: February 9, 2011
    Date of Patent: April 14, 2015
    Inventor: Roger Wen-Yi Hsu
  • Patent number: 9001278
    Abstract: An image display apparatus includes a first optical modulation device and a second optical modulation device configured to emit linearly polarized lights whose polarization directions are perpendicular to each other, first pixels and second pixels are arranged in each of the first optical modulation device and second optical modulation device, retardation layers are disposed on the light emission side of the first pixels or second pixels, the retardation layers configured to convert one linearly polarized light of the linearly polarized lights into the other linearly polarized light. Either arrangements of the first pixels and the second pixels or arrangements of the retardation layers is set so as to be the same in the first optical modulation device and the second optical modulation device, and the other is set so as to be the reverse in the first optical modulation device and the second optical modulation device.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: April 7, 2015
    Assignee: Seiko Epson Corporation
    Inventor: Nobuo Sugiyama
  • Patent number: 8995060
    Abstract: A head-up display device includes an image module, a substrate, and an optical film. The image module has an emitting source, wherein the emitting source transmits at least one image. The substrate is disposed corresponding to the image module. The optical film is disposed on the substrate and includes at least one transmission layer, wherein each transmission layer has a plurality of transmitting column structures obliquely arranged side by side, and a longitudinal direction of the transmitting column structure has a tilt angle with respect to a normal of the substrate. The at least one image is transmitted to the optical film, and the obliquely disposed transmitting column structures cause the at least one image to scatter on the optical film.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: March 31, 2015
    Assignee: National Applied Research Laboratories
    Inventors: Wen-Hao Cho, Bo-Huei Liao, Donyau Chiang, Cheng-Chung Lee
  • Patent number: 8988636
    Abstract: An electronic device is provided with a display such as a liquid crystal display mounted in an electronic device housing. The display has a layer of liquid crystal material sandwiched between an upper display layer such as a color filter layer and a lower display layer such as a thin-film-transistor layer. An upper polarizer is formed on the upper surface of the color filter layer. A lower polarizer is formed on the lower surface of the thin-film-transistor layer. To protect display layers such as a glass color filter layer substrate for the color filter layer from damage during polarizer trimming operations, a coating is deposited on a peripheral edge of the glass color filter layer substrate. The coating may be formed from an elastomeric polymer such as silicone and may remain in place or may be removed following trimming operations.
    Type: Grant
    Filed: October 19, 2012
    Date of Patent: March 24, 2015
    Assignee: Apple Inc.
    Inventors: Mohd Fadzli A. Hassan, Nathan K. Gupta, Yu-Cheng Chen
  • Patent number: 8989535
    Abstract: In embodiments of a multiple waveguide imaging structure, an imaging structure includes a first waveguide for see-through viewing of an environment at a first field of view, and includes a second waveguide for see-through viewing of the environment at a second field of view. The first and second waveguides each include a polarizing beam splitter to reflect light that enters at a first polarization orientation angle in the respective first and second waveguides, and the polarizing beam splitters pass through the light that enters at a second polarization orientation angle. The imaging structure also includes a polarization switch to rotate the polarization of the light through the first and second polarization orientation angles.
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: March 24, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Steven John Robbins
  • Patent number: 8982305
    Abstract: The present invention provides a liquid crystal display (LCD) panel and a display apparatus using the same. In the LCD panel, a second electrode of the second substrate comprises a trunk portion and a plurality of branch portion, and each of the pixels comprises a main pixel region and a sub-pixel region, and an included angle between the trunk portion and the branch portions is of 45 degrees in the main pixel region, and in each of the sub-pixel regions, a predetermined angle between the trunk portion and the branch portions is not equal to 45 degrees. The ?/2 pattern retarder film of the LCD panel comprises ?/2 retarder rows and zero wave retarder rows.
    Type: Grant
    Filed: June 7, 2012
    Date of Patent: March 17, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Chihtsung Kang
  • Publication number: 20150070638
    Abstract: A liquid crystal display apparatus includes a first substrate, a second substrate disposed opposite to the first substrate, a liquid crystal layer and a phase difference compensation film disposed on the first substrate, where the phase difference compensation film includes a fluorine resin.
    Type: Application
    Filed: March 7, 2014
    Publication date: March 12, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Sang-Gu LEE, Seung-Beom PARK, Na-Young SHIN, Jung-Hun LEE, Kyung-Hwan JEON, Hyo-Sung HONG
  • 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
  • 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: 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: 8964138
    Abstract: A glass apparatus for watching a polarized image is provided. The glass apparatus includes a film unit for double-refracting the polarized image when the glass apparatus is tilted; a sensor unit for detecting a slope of the glass apparatus based on a horizontal plane; a voltage driving unit for applying a driving voltage corresponding to the slope detected by the sensor unit, to a liquid crystal cell; the liquid crystal cell for switching an orientation according to the driving voltage, and changing polarization property of an image passing through the film unit according to the switched orientation; and a polarizer for polarizing the image passing through the liquid crystal cell in a preset polarization direction.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: February 24, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-sik Kim, Sergey Shestak, Do-young Kwag, Ho-seop Lee
  • Patent number: 8947621
    Abstract: Disclosed is a method for manufacturing a liquid crystal display device with a front plate including a step of providing, on a surface on a viewing side of a liquid crystal panel having polarizing plates on both sides, a ?/4 plate having a hard coat layer and composed of mainly a thermoplastic resin, an adhesive layer, a front plate composed of glass or acrylic, and a sealing layer containing a UV-curable tacky agent, all being stacked in this order from the viewing side; and a step of curing the sealing layer by irradiating with ultraviolet radiation from a hard coat layer side. The ?/4 plate having the hard coat layer contains 0.005 to 0.5 parts by mass of a compound which shows an absorption peak (?max) in a wavelength range of 260 nm to 400 nm per 100 parts by mass of the thermoplastic resin composing the ?/4 plate.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: February 3, 2015
    Assignee: Konica Minolta Advanced Layers, Inc.
    Inventors: Norie Tanihara, Takashi Murakami
  • Patent number: 8941801
    Abstract: Polarization modulation with in-plane switching of liquid crystals (LCs) may be used in active retarder stereoscopic display systems where viewers wear passive eyewear to see isolated left and right eye images. Embodiments of the present disclosure may include nematic LC or fast switching ferroelectric liquid crystal (FLC), depending on the desired performance.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: January 27, 2015
    Assignee: RealD Inc.
    Inventors: Michael G. Robinson, Jianmin Chen, Gary D. Sharp