Liquid Crystal Optical Element Patents (Class 349/193)
  • Patent number: 10345675
    Abstract: An optical device includes: a first electrode; a second electrode; a refractive index adjustment layer that has a refractive index changing in response to an electric field and is changeable between a transparent state and a state in which the refractive index adjustment layer distributes incident light; and a textured layer including a plurality of protrusions protruding toward the second electrode. The refractive index adjustment layer is provided between the first electrode and the second electrode. The textured layer is provided between the first electrode and the refractive index adjustment layer. The plurality of protrusions is in the form of stripes. The protrusion has a substantially trapezoidal cross-section. A trapezoid which is a cross-sectional shape of the protrusion has a base angle ? at both ends of the lower base ranging from 70 degrees to 85 degrees.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: July 9, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Hirofumi Kubota, Yuko Suzuka
  • Patent number: 10331008
    Abstract: A device for controllably deflecting a first circularly-polarized (CP) light beam from an incident direction with fast response comprises a polarization selector (PS) to adjust the incident light beam's sense of rotation to a desired one to form a second CP light beam, and a polarization grating (PG) to deflect the second CP light beam according to the desired sense of rotation. The PS comprises an optical modulator sandwiched between two quarter-wave plates. The optical modulator has at least one ferroelectric liquid crystal (FLC) half-wave plate (HWP) being reconfigurable in fast axis orientation. The device has a fast response in beam steering due to a short time of reconfiguring the FLC HWP. Based on serially cascading multiple units each being this device, a beam-steering apparatus having fast response and enhanced steering resolution is obtained. The apparatus is usable for enhancing a field of view in projecting an image.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: June 25, 2019
    Assignee: Hong Kong Applied Science and Technology Research Institute Company Limited
    Inventors: Ming Wai Alwin Tam, Xiuling Zhu, Kin Lung Chan
  • Patent number: 10302995
    Abstract: Described herein is a spatial light modulator (15) for modulating the phase, retardation or polarization state of an incident optical signal propagating in a first dimension. The optical phase modulator (15) includes a liquid crystal material (17) and a pair of electrodes (19 and 21) for supplying an electric potential across the liquid crystal material (17) to drive liquid crystals in a predetermined configuration. Modulator (15) also includes a diffractive optical element (29) disposed adjacent a first electrode (19). Element (29) includes a first array of diffractive elements (31) formed of a first material having a first refractive index and extending in a second dimension substantially perpendicular to the first dimension. Elements (31) are at least partially surrounded by a second material (33) formed of a lower refractive index.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: May 28, 2019
    Assignee: Finisar Corporation
    Inventors: Steven James Frisken, Qihong Wu
  • Patent number: 9791759
    Abstract: A multiple glazing with variable scattering by liquid crystals includes first and second flat float glass sheets sealed on the edge of their internal faces by a sealing joint, in particular made of a given sealing material, in particular essentially organic, first and second electrodes, and a layer of liquid crystals with an average thickness E between 15 and 60 ?m inclusive of these values and incorporating spacers. The thickness A of each of the first and second glass sheets is less than or equal to 5.5 mm, and each of the internal faces coated with the first and second electrodes has a dioptric defect score, expressed in millidioptres, of less than 12E/15 where the thickness E of the liquid crystals is in ?m.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: October 17, 2017
    Assignee: Cardinal IG Company
    Inventors: Patrick Gayout, René Poix, Elodie Bouny, Jingwei Zhang
  • Patent number: 9383576
    Abstract: This invention is for a flexible telescope mirror. A mirrored film is stretched across a frame, and deformed into a rough parabola using a partial vacuum. The film is then deformed into a more perfect parabola using electric fields. In some embodiments, a feedback system based on a laser projector and a camera is used to fine tune the resulting parabola for optical performance. The invention allows the creation of large telescope mirrors for a substantially lower price than conventional ground glass mirrors, and allows the creation of substantially lighter mirrors, suitable for space-based applications.
    Type: Grant
    Filed: July 17, 2013
    Date of Patent: July 5, 2016
    Inventor: Rachel Andreasen
  • Publication number: 20150138497
    Abstract: A photonic device is manufactured by: (i) providing (e.g. by inkjet printing) an aliquot of a liquid crystal (LC) material; and (ii) depositing the aliquot onto the surface of a flowable material layer to form a liquid crystal deposit, the flowable material and the LC material being substantially immiscible. The liquid crystal deposit adopts a deformed shape relative to the shape of the aliquot due to interaction with the flowable material layer. This promotes alignment of the LC material. Incorporation of a laser dye allows the photonic device to function as a laser, which can be operated above or below threshold depending on the circumstances. The photonic device can also be used as a passive device based on the photonic bandgap of the aligned LC material.
    Type: Application
    Filed: May 24, 2013
    Publication date: May 21, 2015
    Inventors: Harry Coles, Ian Hutchings, Damian Gardiner, Wen-Kai Hsiao, Philip Hands, Stephen Morris, Timothy Wilkinson
  • 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: 9023238
    Abstract: The present invention relates to an optical switch element, comprising a liquid-crystalline medium for the temperature-dependent regulation of radiant energy flow. The invention furthermore relates to the use of the optical switch element for the regulation of radiant energy flow between interior spaces and the environment and for the regulation of the temperature of interior spaces. The invention furthermore relates to a liquid-crystalline medium, characterized in that it comprises 5-95% of a compound of the formula (I), in particular for use in the optical switch elements according to the invention.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: May 5, 2015
    Assignee: Merck Patent GmbH
    Inventor: Michael Junge
  • Publication number: 20150103279
    Abstract: This application relates a liquid crystal alignment film, a manufacturing method of the liquid crystal alignment film, an optical filter, and a display device. According to one illustrative liquid crystal alignment film, for example, a stereoscopic image can be displayed in wide viewing angles without losses of the brightness.
    Type: Application
    Filed: December 18, 2014
    Publication date: April 16, 2015
    Inventors: Byoung Kun JEON, Moon Soo Park, Bu Gon Shin, Sin Young Kim, Jong Byung Lee, Da Mi Lee, Ji Hoon Park
  • Patent number: 9001282
    Abstract: A variable power optical element is divided into cells which contain two liquid crystals mixed according to different proportions. The proportion of one of the liquid crystals in each cell increases on the basis of the radial distance between a central point of the optical element and said cell. An appropriate selection of the two liquid crystals results in a higher variation of the optical power between two control states of said optical element. More particularly, the optical element may consist of an ophthalmic lens which changes between a convergent lens state and a divergent lens state.
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: April 7, 2015
    Assignees: Essilor International (Compagnie Generale d'Optique), Centre National de la Recherche Scientifique—CNRS
    Inventors: Samuel Archambeau, Henri Camon, Solon Mias
  • Patent number: 8994914
    Abstract: There is provided an integrated wide viewing film including: a first film having an optical axis located in-plan; and a second film having an optical axis located in a thickness direction thereof, and inclined at a predetermined angle in an in-plane direction. The IPS-LCD employing the integrated wide viewing film can be significantly improved in a contrast ratio in a diagonal direction.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: March 31, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Jun-Won Chang, Belyaev Sergey, Malimonenko Nikolay
  • 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: 8968836
    Abstract: Method for producing an electromagnetic wave reflective film by a first selective reflection layer forming process of using a transparent substrate; applying a first selective reflection layer forming coating solution on the transparent substrate to form a first selective reflection layer forming layer; irradiating the first selective reflection layer forming layer with ultraviolet rays at a dose in the range of 25 mJ/cm2 to 800 mJ/cm2; and thereby forming a first selective reflection layer; and a second selective reflection layer forming process of: using a second selective reflection layer forming coating solution; applying the second selective reflection layer forming coating solution on the first selective reflection layer so as to be in direct contact therewith to form a second selective reflection layer forming layer; irradiating the second selective reflection layer forming layer with ultraviolet rays; and thereby forming a second selective reflection layer.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: March 3, 2015
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Satoru Hamada, Shoji Takeshige, Keiji Kashima
  • Patent number: 8962103
    Abstract: A liquid crystal film (LCF), a method of manufacturing the same, an optical device, or an LCD is provided. The exemplified LCF can be used as a reflective polarization plate, which can improve luminance and light utilization efficiency of a display device, such as an LCD, and the like.
    Type: Grant
    Filed: November 10, 2011
    Date of Patent: February 24, 2015
    Assignee: LG Chem, Ltd.
    Inventors: Dae Hee Lee, Jun Won Chang, Moon Soo Park
  • Patent number: 8958050
    Abstract: A tunable terahertz (THz) metamaterial (MTM) filter including: a first wire grid and a second wire grid that are arranged parallel to each other; a dielectric substrate and a liquid crystal layer that are sequentially disposed between the first wire grid and the second wire grid; a plurality of metal strips that are disposed between the dielectric substrate and the liquid crystal layer; and a first control electrode electrically connected to the first wire grid and a second control electrode electrically connected to the second wire grid.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: February 17, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dmitry Viktorovich Kholodnyak, Dmitry Sergeevich Kozlov, Irina Borisovna Vendik, Mikhail Aleksandrovich Odit
  • Patent number: 8934078
    Abstract: A multiple glazing with variable scattering by liquid crystals includes first and second flat float glass sheets sealed on the edge of their internal faces by a sealing joint, in particular made of a given sealing material, in particular essentially organic, first and second electrodes, and a layer of liquid crystals with an average thickness E between 15 and 60 ?m inclusive of these values and incorporating spacers. The thickness A of each of the first and second glass sheets is less than or equal to 5.5 mm, and each of the internal faces coated with the first and second electrodes has a dioptric defect score, expressed in millidioptres, of less than 12E/15 where the thickness E of the liquid crystals is in ?m.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: January 13, 2015
    Assignee: Cardinal IG Company
    Inventors: Patrick Gayout, René Poix, Elodie Bouny, Jingwei Zhang
  • Patent number: 8926091
    Abstract: The present invention relates to optical elements, such as but not limited to ophthalmic elements, comprising an alignment facility for an optical dye. The optical elements include a substrate; and an alignment facility for an optical dye connected to at least a portion of the substrate, where the alignment facility is an at least partial coating of an at least partially ordered liquid crystal material having at least a first general direction.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: January 6, 2015
    Assignee: Transitions Optical, Inc.
    Inventors: Anil Kumar, Peter C. Foller, Jiping Shao
  • Patent number: 8917375
    Abstract: Embodiments of a grey-scale holographic structure and system for generating a collimated wavefront in a compact range are generally described herein. In some embodiments, the grey-scale holographic structure comprising millimeter-wave transmissive material having a surface arranged to provide differing amounts of phase-delay to an incident millimeter-wave wavefront as the incident wavefront passes through the material. The grey-scale holographic structure may comprises a plurality of layers (N) to provide a phase total delay of lambda which results from a series tuned layers, each having a thickness of a wavelength/N. Each layer provides a predetermined amount of phase delay allowing the structure to operate as a phase-delay hologram.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: December 23, 2014
    Assignee: Raytheon Company
    Inventor: Rigel Quinn Woida-O'Brien
  • Patent number: 8873015
    Abstract: A display device that has a display panel having a front substrate, an image forming unit, and a back substrate rendered together in layers, and a wiring board layered on the back surface of the back substrate. A plurality of input/output pins are formed on the front surface of the back substrate, and a plurality of connection pins that are electrically connected to the input/output pins by respective conductor members are formed on the back surface of the wiring board.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: October 28, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Shigeaki Seki, Kenichi Okuhara
  • Patent number: 8865275
    Abstract: A light absorption anisotropic film, wherein content of a liquid crystalline non-colorable low molecular weight compound is 30% by mass or less; and which is obtained by fixing the alignment of a dichroic dye composition comprising at least one type of azo-based dichroic dye having nematic liquid crystallinity; and shows a diffraction peak derived from a periodic structure in a direction parallel to the alignment axis on measurement of X-ray diffraction. The light absorption anisotropic film is high in dichroism.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: October 21, 2014
    Assignee: Fujifilm Corporation
    Inventors: Shinichi Morishima, Nobutaka Iwahashi
  • Patent number: 8867015
    Abstract: An electronic device may have a display such as a liquid crystal display. The display may have an array of display pixels. The array of display pixels may display images for a user in an active area of the display. An inactive area of the display may surround the active area. An opaque masking layer may be provided in the inactive area to block internal components in the electronic device from view. An optical component such as a light-based proximity sensor, ambient light sensor, image sensor, or light-emitting status indicator may be aligned with an opening in the opaque masking layer. A liquid crystal shutter may be provided in the display. The liquid crystal shutter may be controlled by control circuitry in the electronic device. The liquid crystal shutter may be aligned with the opening in the opaque masking layer in the inactive area and with the optical component.
    Type: Grant
    Filed: January 11, 2012
    Date of Patent: October 21, 2014
    Assignee: Apple Inc.
    Inventors: Bryan W. Posner, Jun Qi, Victor H. Yin, Thomas W. Wilson, Jr., Dinesh C. Mathew, Keith J. Hendren, Peteris K. Augenbergs, Adam T. Garelli, Stephen R. McClure, Carl R. Peterson
  • Patent number: 8859683
    Abstract: An optical resin composition that is transparent, has suitable adhesion and necessary impact absorption for protection of an image display device etc., not affecting constituent materials of a image display panel, and being excellent in reliability, can be used to provide an optical resin material using the same. The optical resin composition contains (A) a first acrylate derivative that is a compound having one polymerizable unsaturated bond in its molecule, (B) a second acrylate derivative that is a compound having two or more polymerizable unsaturated bonds in its molecule, and (C) an acrylate derivative polymer, and an optical resin material produced by curing reaction of the optical resin composition.
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: October 14, 2014
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Tooru Takahashi, Yasuhisa Ishida, Hisashige Kanbara, Hidekazu Kondou
  • Patent number: 8848145
    Abstract: A light reflective film is produced by (a) forming a hard coat layer having a surface energy of less than 30 mN/m and a pencil hardness of at least 2H on a resin film, (b) applying a curable liquid crystal composition onto the surface of the opposite side, (c) drying the applied curable liquid crystal composition to be in a state of a cholesteric liquid crystal phase, (d) promoting the curing reaction to form a light reflective layer, and (e) repeating at least once the process of from (b) to (d).
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: September 30, 2014
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Oki, Takao Taguchi
  • Publication number: 20140286019
    Abstract: A lens cap (3) is arranged to cover a light-emitting surface (23) of a light source (2), the lens thereby guiding light from the light source (2) in oblique directions relative to the light source (2). The lens cap (3) includes, in a planar view, a light transmitting region (33) and a light blocking region (34), the light transmitting region (33) divided into a plurality of light transmitting regions by the light blocking region (34) so that the light from the light source (2) passes through the plurality of light transmitting regions (33) and is separated into beams traveling in different directions.
    Type: Application
    Filed: April 16, 2012
    Publication date: September 25, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Ryoh Araki, Kei Oyobe, Yoshinobu Hirayama, Toshihiro Yanagi
  • Patent number: 8842241
    Abstract: A light reflective film is produced by (a) forming an antistatic layer having a surface energy of at least 30 mN/m on a resin film, (b) applying a curable liquid crystal composition onto the surface of the opposite side, (c) drying the applied curable liquid crystal composition to be in a state of a cholesteric liquid crystal phase, (d) promoting the curing reaction to form a light reflective layer, and (e) repeating at least once the process of from (b) to (d).
    Type: Grant
    Filed: July 21, 2011
    Date of Patent: September 23, 2014
    Assignee: Fujifilm Corporation
    Inventors: Kazuhiro Oki, Takao Taguchi
  • Publication number: 20140253860
    Abstract: Provided is a method of producing a film including: a coating step of coating, on a substrate, a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound, an alignment controlling agent capable of controlling alignment of the polymerizable liquid crystal compound, a polymerization initiator and coated film a solvent; and a drying step of drying, wherein the alignment controlling agent is a compound represented by formula (1) below, and the alignment controlling agent is added in 0.005 to 0.2 parts by mass relative to 100 parts by mass of the polymerizable liquid crystal compound: In general formula (1), each of L1 and L2 represents an alkylene group having 1 to 6 carbon atoms that may be substituted with a fluorine atom or the like, and n1 and n2 represents integers of 3 or more.
    Type: Application
    Filed: May 23, 2014
    Publication date: September 11, 2014
    Applicant: FUJIFILM CORPORATION
    Inventors: Wataru MAJIMA, Kazuhiro OKI, Hirotoshi ANDOU
  • Patent number: 8829521
    Abstract: Provided is a TFT board for a liquid crystal display device including: a circuit layer formed on a substrate, the circuit layer including a thin film transistor including a semiconductor layer, a gate electrode, a drain electrode, and a source electrode; and a color filter layer formed on the circuit layer. The color filter layer has a through hole formed therein above the semiconductor layer in a region between the source electrode and the drain electrode.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 9, 2014
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Tetsuya Kawamura, Masumi Yoshida
  • Patent number: 8807755
    Abstract: The polarization beam splitting element is configured to reflect or transmit an entering beam according to its polarization direction. The element includes, in order from a beam entrance side, a base member having a light transmissive property, a first one-dimensional grating structure formed of a dielectric material and having, in a first direction, a first grating period smaller than a wavelength of the entering beam, and a second one-dimensional grating structure formed of a metal and having, in a second direction orthogonal to the first direction, a second grating period smaller than the wavelength of the entering beam.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: August 19, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Rie Ishimatsu
  • Publication number: 20140225047
    Abstract: To provide a photosensitive polymer, a phase difference film using the photosensitive polymer, and an optical film using the phase difference film. A solution is a photosensitive polymer having a constitutional unit represented by formula (1): wherein, in formula (1), for example, R1 is hydrogen or methyl; a is 2 or 3; p is an integer from 1 to 12; X1 is —O—, —COO— or —OCO—; b is an integer from 0 to 3; A1 is a divalent group selected from 1,4-phenylene or naphthalene-2,6-diyl, and in the divalent group, at least one of hydrogen may be replaced by fluorine or chlorine; Z1 is a single bond, —COO—, —CH?CH—COO—, —CH2CH2—COO—, —CH2O— or —CONH—; W1 and W2 are hydrogen, fluorine or 1-5C alkyl or alkoxy; Y1 is —O—; and R2 is 1-20C alkyl, and at least one of —CH2— in the alkyl may be replaced by —O—.
    Type: Application
    Filed: January 28, 2014
    Publication date: August 14, 2014
    Applicants: JNC PETROCHEMICAL CORPORATION, JNC CORPORATION
    Inventor: Daisuke OOTSUKI
  • Patent number: 8780318
    Abstract: A patterned phase retardation film is disclosed, which includes substrate, a phase retardation layer on the substrate comprising a plurality of first regions of liquid crystal materials and a plurality of second regions of curable resin, wherein the first regions and the second regions are in a grating stripe structure which is parallel and interleaved with each other the top part of the second regions is formed with at least one inclined plane; and a planarization layer for planarizing the phase retardation layer; wherein the first regions provide a first phase retardation and second regions provide a second phase retardation, the first phase retardation and the second phase retardation have a phase difference of 180°. The method for manufacturing the patterned phase retardation film is also disclosed.
    Type: Grant
    Filed: May 21, 2012
    Date of Patent: July 15, 2014
    Assignee: BenQ Materials Corporation
    Inventors: Lung-Hai Wu, Chen-Kuan Kuo, Fung-Hsu Wu, Cyun-Tai Hong, Chih-Haw Wang
  • Publication number: 20140184992
    Abstract: A liquid crystal display device includes first and second polarizers with absorption axes orthogonal to each other; first and second substrates between the first and second polarizers and at least one of which has a transparent electrode; and a twisted-nematic liquid crystal cell disposed between the first and second substrates, wherein a light scattering film is provided at a viewing side of the first and second polarizers and includes a support member and a liquid crystal layer composed of a liquid crystal compound, wherein the pitch of the liquid crystal compound ranges between 0.35 ?m and 3 ?m and is oriented at 45° relative to a liquid-crystal direction of the liquid crystal display device, wherein the liquid crystal layer has a thickness between 0.
    Type: Application
    Filed: December 18, 2013
    Publication date: July 3, 2014
    Applicant: FUJIFILM CORPORATION
    Inventors: Megumi SEKIGUCHI, Shinichi MORISHIMA, Takashi YONEMOTO, Hiroshi SATO, Taketo OTANI
  • Publication number: 20140184052
    Abstract: An optical film includes: a liquid crystal coating; and a base layer on the liquid crystal coating, wherein the liquid crystal coating has reversed wavelength dispersion and in-plane retardation for a reference wavelength ranging from 126 nm to 153 nm, and the base layer has in-plane retardation ranging from about 0 to about 50 nm and out-of-plane retardation ranging from about 0 nm to about 100 nm.
    Type: Application
    Filed: December 26, 2013
    Publication date: July 3, 2014
    Applicants: CHEIL INDUSTRIES INC., SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hee-Kyung KIM, Moon Yeon LEE, Kyoung Ah OH, Kyu Yeol IN, Ji-Hoon LEE, Myung Sup JUNG, Sang ah Gam
  • Patent number: 8758869
    Abstract: An optical element is provided. The optical element is a light-dividing element, for example an element that can divide incident light into at least two kinds of light having different polarized states. The optical element can be used to realize a stereoscopic image.
    Type: Grant
    Filed: September 26, 2012
    Date of Patent: June 24, 2014
    Assignee: LG Chem Ltd.
    Inventors: Sin Young Kim, Jae Hoon Shim, Ki Uk Lim, Yeong Rae Chang, Moon Soo Park, Soo Kyoung Lee, Hyun Hee Son, Hyuk Yoon
  • Patent number: 8758868
    Abstract: An optical device is provided. The optical device according to one embodiment may be a light-dividing device, for example, a device that can divide incident light into at least two kinds of light having different polarization states. For example, the optical device can be used to realize a stereoscopic image.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: June 24, 2014
    Assignee: LG Chem Ltd.
    Inventors: Sin Young Kim, Kyung Ki Hong, Moon Soo Park, Seung Hun Chae, Eun Mi Seo, Doo Young Huh, Hyuk Yoon, Kyun Il Rah, Su Young Ryu
  • Patent number: 8755023
    Abstract: Embodiments of a grey-scale holographic structure and system for generating a collimated wavefront in a compact range are generally described herein. In some embodiments, the grey-scale holographic structure comprising millimeter-wave transmissive material having a surface arranged to provide differing amounts of phase-delay to an incident millimeter-wave wavefront as the incident wavefront passes through the material. The grey-scale holographic structure may comprises a plurality of layers (N) to provide a phase total delay of lambda which results from a series tuned layers, each having a thickness of a wavelength/N. Each layer provides a predetermined amount of phase delay allowing the structure to operate as a phase-delay hologram.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: June 17, 2014
    Assignee: Raytheon Company
    Inventor: Rigel Quinn Woida-O'Brien
  • Patent number: 8749750
    Abstract: A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. The discrimination medium includes an optically transparent first substrate on which a cholesteric liquid crystal layer is formed, the cholesteric liquid crystal layer being formed with a fine asperity used for displaying a hologram, an optically transparent second substrate on which a print layer is formed, the print layer having a predetermined pattern made of ink and having a transparent portion without the ink of the pattern around the pattern, the pattern reflecting or absorbing a light of a predetermined wavelength, and a transparent adhesive layer, wherein the optically transparent first substrate, the optically transparent second substrate, and the transparent adhesive layer, are disposed in turn from a side checked visually.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 10, 2014
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hidekazu Hoshino, Tokio Sakauchi, Mutsumi Sasaki, Tohru Ida, Naomi Iida
  • Patent number: 8747966
    Abstract: An optical element and a stereoscopic image display device are provided. The optical element is a light-dividing element, for example an element that can divide incident light into at least two kinds of light having different polarized states. Therefore, the optical element can be used to realize a stereoscopic image.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: June 10, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Eun Mi Seo, Sin Young Kim, Kyun Il Rah, Moon Soo Park, Seung Hun Chae
  • Patent number: 8736798
    Abstract: An optical element is provided. The optical element shows excellent durability, hardness property and reworkability. Therefore, the optical element can have a stable light division property since the phase retardation property of the phase retardation layer in the optical element can be stably maintained for a long period of time under severe conditions. Also, it is possible to prevent side effects such as light leakage in an optical instrument to which the optical element is applicable. Also, the optical element can show excellent resistance to external pressure or scratches.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: May 27, 2014
    Assignee: LG Chem Ltd.
    Inventors: Sin Young Kim, Moon Soo Park, Seung Hun Chae, Hyuk Yoon
  • Patent number: 8736805
    Abstract: A mirror system, comprising a spectrally selective liquid crystal reflective assembly, designed and constructed to substantially absorb or transmit light at wavelengths corresponding to mesopic conditions, while reflecting light at other wavelengths. In one embodiment, the reflectance level of the mirror system is altered in response to a voltage applied across the selective liquid crystal reflective assembly.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: May 27, 2014
    Assignee: Alphamirror Inc.
    Inventors: Yehuda Borenstein, Bahman Taheri
  • Publication number: 20140139786
    Abstract: The present invention relates to polymerisable compounds, to processes and intermediates for the preparation thereof, to liquid-crystal (LC) media comprising them, and to the use of the polymerisable compounds and LC media for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the PSA (“polymer sustained alignment”) type.
    Type: Application
    Filed: April 12, 2013
    Publication date: May 22, 2014
    Applicant: Merck Patent GmbH
    Inventors: Martin ENGEL, Andreas TAUGERBECK, Constanze BROCKE, Helmut HAENSEL, Stephan DEROW, Julian VOGT
  • Patent number: 8717509
    Abstract: A stereoscopic optical device includes a substrate, an alignment film and a liquid crystal layer. The alignment film includes at least one first region and at least one second region. The liquid crystal layer, disposed on the alignment film, includes first liquid crystal molecules and second liquid crystal molecules. The first liquid crystal molecules correspond to the first region of the alignment film and have a first pre-tilt angle, the second liquid crystal molecules correspond to the second region of the alignment film and have a second pre-tilt angle. The fast axis of the first liquid crystal molecules and the fast axis of the second crystal molecules substantially face the same direction, and the slow axis of the first liquid crystal molecules and the slow axis of the second liquid crystal molecules substantially face in the same direction.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: May 6, 2014
    Assignee: AU Optronics Corp.
    Inventors: Hsin-An Cheng, Liang-Yin Huang
  • Publication number: 20140109302
    Abstract: The invention relates to an optical filter comprising: at least one optically transparent liquid-crystal shutter, the shutter having a polarization voltage ULCD that marks a threshold between two polarization states, and being designed to switch between at least two opacities OP1 and OP2, OP2 being strictly higher than OP1, when it receives a voltage that is above or below, respectively, the polarization voltage ULCD; and an electronic system comprising: an electronic module for controlling the liquid-crystal shutter, designed to control the voltage applied to the liquid crystal shutter; a photosensitive sensor, designed to deliver, to the electronic control module, a continuous voltage Ucs that varies depending on the luminous intensity that it receives, the photosensitive sensor being the only power supply of the electronic control module and the liquid-crystal shutter, the optical filter being characterized in that, if the photosensitive sensor receives a luminous intensity below a dazzle threshold le, the
    Type: Application
    Filed: May 25, 2012
    Publication date: April 24, 2014
    Applicant: Nokia Corporation
    Inventors: Evelyne Casbi, Jean-Paul Borreau
  • Patent number: 8697199
    Abstract: The invention relates to novel calamitic mesogenic compounds which are especially suitable for use in birefringent films with negative optical dispersion, to novel liquid crystal (LC) formulations and polymer films comprising them, and to the use of the compounds, formulations and films in optical, electrooptical, electronic, semiconducting or luminescent components or devices.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: April 15, 2014
    Assignee: Merck Patent GmbH
    Inventors: Kevin Adlem, Owain Llyr Parri, Karl Skjonnemand, David Wilkes
  • Patent number: 8687257
    Abstract: To realize a memory effect in an optical device using the electro wetting effect. An optical device includes: first and second substrates placed opposite each other; a partition provided therebetween; a first electrode provided on one side of the first substrate, at least a part thereof overlapping with a region surrounded by the partition in a plan view; second and third electrodes provided on one side of the second substrate and which are respectively placed opposite the first electrode across the region surrounded by the partition; a smoothing layer provided on one side of the second substrate and which covers the second and third electrodes; and first and second fluid, which are incompatible, disposed in the region surrounded by the partition. The first fluid is made of a liquid body possessing polarity or conductivity, and the second fluid is made of a liquid body containing a liquid-crystalline material.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: April 1, 2014
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Yasuo Toko, Tatsuya Saito, Taiju Takahashi
  • Patent number: 8687165
    Abstract: An imaging system for imaging an object onto an image sensor, and which has a front side facing the object and a rear side facing away from the object, the rear side being arranged behind the front side as viewed from the object. Furthermore, the imaging system has a light entrance device at the front side through which light coming from the object can enter into the imaging system. In this case, the light traverses the beam path between object and image sensor. At least one first and one second optical element are likewise present and are arranged at the rear side in such a way that they can influence the beam path. The light entrance device has an electrically switchable liquid crystal element which deflects the beam path at at least one first angle and a second angle which is different from the first angle depending on the electrical switching state. A discretely switchable focal length change is realized by this electrically effected change in the beam path.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: April 1, 2014
    Assignee: Jos. Schneider Optische Werke GmbH
    Inventor: Lingli Wang
  • Publication number: 20140078459
    Abstract: Disclosed is a filter for selective transmission of visible rays and infrared rays using an electrical signal. The filter comprises: a first filter for controlling the degree of absorption of visible rays by changing the molecular arrangement in accordance with the control of the electrical signal; and a second filter for controlling the degree of reflection of infrared rays by changing reflectivity in accordance with the control of the electrical signal.
    Type: Application
    Filed: October 28, 2011
    Publication date: March 20, 2014
    Inventors: Seong Jin Kim, Do Kyoon Kim, Kee Chang Lee
  • Patent number: 8659737
    Abstract: The instant invention relates to mesogenic media exhibiting a blue phase, comprising two or more components selected from the following components, components A to C, component A comprising one or more compounds selected from the group of compounds of formula I-T component B consisting of one or more compounds selected from the group of compounds of formula I-N component C consisting of one or more compounds selected from the group of compounds of formula I-E wherein the parameters are as specified in the text, preferably stabilized by a polymer, and their use in electro-optical light modulation elements and their respective use in displays, as well as to such displays.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 25, 2014
    Assignee: Merck Patent GmbH
    Inventors: Michael Wittek, Norihiko Tanaka, Mila Fischer, Erdal Durmaz
  • Patent number: 8652592
    Abstract: A discrimination medium on which printing can be freely performed, which cannot be easily falsified, in which the authenticity can be easily discriminated by unique appearance, and which can be produced at low cost, is provided. A cholesteric liquid crystal layer 10, and a breakable print recording layer are laminated in the discrimination medium. The cholesteric liquid crystal layer 10 has plural light transparent films, which are laminated and are different from each other in refraction index. Therefore, the discrimination medium has unique optical characteristics such that a character, a symbol, a pattern, a figure formed by printing by a thermal printer or the like changes in color depending on the viewing angle. A discrimination method using the above optical characteristics of the discrimination medium is provided.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: February 18, 2014
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hidekazu Hoshino, Itsuo Takeuchi
  • Patent number: 8647726
    Abstract: An optical element and a stereoscopic image display device are provided. The optical element is a light-dividing element, for example, an element that can divide incident light into at least two kinds of light having different polarized states. Therefore, the optical element can be used to realize a stereoscopic image.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: February 11, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Eun Mi Seo, Sin Young Kim, Kyun Il Rah, Moon Soo Park, Seung Hun Chae
  • Patent number: 8613868
    Abstract: The present invention relates to compounds represented by the following Formula I, In Formula I, R1 and R2 are each independently selected from hydrogen, and optionally substituted hydrocarbyl, provided that at least one of R1 and R2 is selected from optionally substituted hydrocarbyl (e.g., tertiary butyl); n is 0, 1 or 2, and each R3 is independently selected from optionally substituted hydrocarbyl; L1 is a divalent linking group, such as a bond or —C(O)O—; each L2 independently represents a flexible segment, such as divalent linear or branched C1-C25 alkyl; each L3 independently represents a rigid segment including, for example, optionally substituted phenylen-1,4-diyl groups; t is from 1 to 4; m and p are each independently from 0 to 4 for each t, provided that the sum of m and p is at least 1 for each t; and E can be, for example, C5-C18 aryl.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: December 24, 2013
    Assignee: Transitions Optical, Inc
    Inventors: Xiao-Man Dai, Ruisong Xu, Meng He, Anil Kumar, Rachael L. Yoest, Chenguang Li