Circular Patents (Class 349/98)
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Publication number: 20150062505Abstract: 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: ApplicationFiled: August 7, 2014Publication date: March 5, 2015Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Nobuyuki HATANAKA, Tadahiro KOBAYASHI, Akira YOKOTA, Tatsuaki KASAI
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Patent number: 8970953Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A fanned by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.Type: GrantFiled: November 12, 2010Date of Patent: March 3, 2015Assignee: NHK Spring Co., Ltd.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Seiya Shibuya, Tohru Ida
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Patent number: 8970812Abstract: Provided are a circular polarizer and a reflective liquid crystal display including the same. The circular polarizer includes a polarizer comprising a polarizing film in which an absorption axis has an angle of about 85° to about 95° with respect to a liquid crystal alignment direction of a liquid crystal cell, where, in CIE coordinates, a color “a” is about ?1 to about ?0.6 and a color “b” is about 0.3 to about 2.5 and a ¼ wavelength plate in which an optical axis has an angle of about 130° to about 140° with respect to the liquid crystal alignment direction of the light crystal cell. When the circular polarizer is used, the visibility and color tone of the reflective liquid crystal display may be improved.Type: GrantFiled: March 15, 2011Date of Patent: March 3, 2015Assignee: LG Chem, Ltd.Inventors: Sung-Hyun Nam, Hyuk Yoon, Kyun Il Rah, Moon-Soo Park
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Publication number: 20150042922Abstract: A liquid crystal display panel includes a metal electrode, a transparent electrode, an interlayer insulating film, and a comb-shaped electrode. Distorted horizontal electric fields are generated in order to distort the orientation of liquid crystal molecules. Accordingly, it is possible to achieve a transflective liquid crystal display device that has high transmittance, reflectance, and yield, and that can suppress display defects such as screen burn-in without using a panel gap adjusting structure, a driving method that respectively applies different electric fields to the reflective region and the transmissive region, or a multi-L/S structure.Type: ApplicationFiled: February 20, 2013Publication date: February 12, 2015Applicant: Sharp Kabushiki KaishaInventors: Yuichi Kawahira, Toshihiro Matsumoto, Mitsuhiro Murata, Yosuke Iwata
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Publication number: 20150022745Abstract: A phase modulator for the modulation of the phase of circular polarised light which interacts with the phase modulator. The phase modulator has a first and a second substrate, an electrode arrangement and a liquid crystal layer with liquid crystal molecules. The first substrate is disposed adjacent to the second substrate. The liquid crystal layer is disposed between the two substrates. The first substrate has a first surface, and the second substrate has a second surface. The liquid crystal molecules situated next to the first surface are oriented substantially parallel to the first surface. The liquid crystal molecules situated next to the second surface are oriented substantially perpendicular to the second surface. An in-plane component of the liquid crystal molecule orientation can be set within an angular range of about 180°, e.g. between ?90° and +90° related to a specifiable central orientation.Type: ApplicationFiled: September 17, 2014Publication date: January 22, 2015Inventors: Bo KROLL, Norbert LEISTER
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Publication number: 20150015834Abstract: A display apparatus may include a first substrate defined by a pixel region and a transmitting region adjacent to the pixel region, the pixel region emitting light in a first direction and the transmitting region transmitting external light; a second substrate that faces the first substrate and seals pixels defined on the first substrate; an optical filter arranged on a first side of the display apparatus through which light is emitted, the optical filter being configured to transmit circularly polarized light that rotates in a predetermined direction; and an optical reflectance conversion device arranged on a second side of the display apparatus, opposite the first side, the optical reflectance conversion device being configured to change a reflectance of the external light according to modes of operation of the display apparatus.Type: ApplicationFiled: September 30, 2014Publication date: January 15, 2015Inventors: Sang-Hoon YIM, Young-Woo SONG, Jin-Koo CHUNG
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Publication number: 20150009432Abstract: A method for manufacturing of a conductive member include forming one of a conductive layer including metal nanowires or a light-scattering layer including insulating light-scattering fine particles on a substrate in a pattern shape; and forming the other of the conductive layer including metal nanowires or the light-scattering layer including insulating light-scattering fine particles on a space of the substrate wherein the one of the conductive layer or the light-scattering layer is not formed.Type: ApplicationFiled: September 22, 2014Publication date: January 8, 2015Applicant: FUJIFILM CorporationInventor: Kensuke KATAGIRI
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Publication number: 20150009459Abstract: The present invention provides a liquid crystal display panel and a liquid crystal display device which have improved viewing angle characteristics due to having a multi-domain structure and the like and can sufficiently improve transmittance. The present invention relates to a liquid crystal display panel, including a first substrate and a second substrate facing each other; and a liquid crystal layer interposed between the substrates, the first substrate and/or the second substrate including a vertical alignment film on the liquid crystal layer side to align liquid crystal molecules, at a voltage lower than a threshold voltage, in the vertical direction to main surfaces of the substrates, the first substrate and/or the second substrate including a common electrode, the common electrode including a grid-shaped first common electrode, the first substrate including a pixel electrode, and the pixel electrode being branched.Type: ApplicationFiled: December 19, 2012Publication date: January 8, 2015Inventors: Yosuke Iwata, Hidefumi Yoshida, Mitsuhiro Murata
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Publication number: 20140375927Abstract: An image display device in which an image display panel, at least one patterned retardation layer and a polarization element layer are arranged in this order, and the patterned retardation layer includes first retardation regions and second retardation regions which are alternately arranged in a stripe-like form and in which at least one of an in-plane slow axis direction and a retardation is different from each other.Type: ApplicationFiled: September 4, 2014Publication date: December 25, 2014Applicant: FUJIFILM CORPORATIONInventors: Makoto ISHIGURO, Yoji ITO
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Publication number: 20140368771Abstract: The present invention provides a liquid crystal display device which can achieve cost reduction, excellent productivity, and a high contrast ratio within a wide viewing angle range. The liquid crystal display device of the present invention includes, in the order set forth, a first polarizer, a first ?/4 plate, a liquid crystal cell, a second ?/4 plate, a third Type-I birefringent layer, a Type-IV birefringent layer, and a second polarizer. An in-plane slow axis of the first ?/4 plate forms an angle of about 45° with an absorption axis of the first polarizer. An in-plane slow axis of the second ?/4 plate is substantially perpendicular to the in-plane slow axis of the first ?/4 plate. An absorption axis of the second polarizer is substantially perpendicular to the absorption axis of the first polarizer. An in-plane slow axis of the third Type-I birefringent layer is substantially parallel with the absorption axis of the second polarizer.Type: ApplicationFiled: January 25, 2013Publication date: December 18, 2014Inventors: Akira Sakai, Masahiro Hasegawa, Takayuki Nishiyama
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Patent number: 8885123Abstract: The present invention provides a 3D display apparatus which comprises a display and a liquid crystal cell module. The liquid crystal cell module retards a phase of the light emitted from the display and corresponding to a display frame for forming a left-handed circularly polarized light and a right-handed circularly polarized light. The present invention further provides a method for manufacturing the 3D display apparatus. The present invention can display 3D images without losing image information. The response time of a ferroelectric liquid crystal and an anti-ferroelectric liquid crystal of the present invention is faster, and thus the effect on the luminance of the display is less.Type: GrantFiled: July 26, 2011Date of Patent: November 11, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co. Ltd.Inventor: Hong-Ji Huang
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Patent number: 8877304Abstract: It is an object of the present invention to provide an optical film which has reverse chromatic dispersibility that its retardation becomes smaller as the wavelength becomes shorter and a low photoelastic constant.Type: GrantFiled: June 17, 2008Date of Patent: November 4, 2014Assignee: Teijin Chemicals, Ltd.Inventors: Tetsuya Motoyoshi, Masatoshi Ando, Makoto Ueno, Akiko Nishijima
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Patent number: 8820937Abstract: An optical polarization state modulator assembly for use in a stereoscopic three-dimensional image projection system includes a spatial light modulator, a light source emitting multiple wavelength components of light for incidence on the spatial light modulator, and a projection lens. A polarization converter system cooperates with the spatial light modulator to produce in alternating sequence polarized light carrying first and second perspective view images of a scene in different ones of first and second subframes. A polarization modulator, in response to first and second drive signals, imparts to, respectively, the image-carrying polarized light a first output polarization state during the first subframe and to the image-carrying polarized light a second output polarization state during the second subframe. The image-carrying polarized light in the first and second output polarization states propagates through the projection lens for transmission to an observer.Type: GrantFiled: February 23, 2012Date of Patent: September 2, 2014Assignee: LC-TEC Displays ABInventors: Jesper Osterman, Terry J. Scheffer
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Patent number: 8810753Abstract: A liquid crystal device includes: a liquid crystal layer; a first substrate and a second substrate between which the liquid crystal layer is sandwiched; a reflective layer operable to reflect light which is incident thereon from the second substrate side through the liquid crystal layer; a plurality of optical layers disposed on the side opposite to the first substrate with reference to the second substrate; and a plurality of light-scattering layers which are each disposed in at least one of a region between the second substrate and the optical layers and a region between two mutually proximate ones of the optical layers and which each show relatively larger forward scattering and relatively smaller back scattering.Type: GrantFiled: November 22, 2011Date of Patent: August 19, 2014Assignee: Sony CorporationInventor: Toshiharu Matsushima
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Publication number: 20140226097Abstract: A reflective liquid crystal on silicon (LCOS) display comprises a transparent substrate, a reflective substrate, and liquid crystal fluid between the substrates. The LCOS display further comprises a matrix of pixels, arranged in a plurality of rows and columns, wherein an intersection of a row and a column defines a position of a pixel in the matrix. The LCOS display has tilt angles sufficient to overcome disclinations due to fringe fields, and, at the same time, achieves high contrast. The surface azimuthal direction of the molecules of the liquid crystal fluid is either substantially parallel or perpendicular to the direction of polarization of incoming incident linearly polarized light. Light leakage is minimal because the effective birefringence as seen by the incoming incident linearly polarized light is substantially zero and does not depend on the pretilt of the molecules of the liquid crystal fluid.Type: ApplicationFiled: April 21, 2014Publication date: August 14, 2014Applicant: Compound Photonics LimitedInventor: Hemasiri VITHANA
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Patent number: 8758868Abstract: 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: GrantFiled: April 25, 2012Date of Patent: June 24, 2014Assignee: 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
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Patent number: 8703554Abstract: An array substrate for an LCD device includes a gate line crossing a data line to define a pixel region. A thin film transistor (TFT) includes a gate electrode connected to the gate line, insulating and active layers on the gate electrode, a source electrode connected to the data line, and a drain electrode spaced apart from the source electrode. An auxiliary common electrode includes a horizontal portion disposed in the pixel region. A metal layer overlaps the insulating layer and contacts the horizontal portion of the auxiliary common electrode through a contact hole defined through the insulating layer. A passivation layer is disposed on the TFT and the metal layer. A pixel electrode has a horizontal portion overlapping the metal layer with the passivation layer therebetween to form a storage capacitor, the pixel electrode connected to the drain electrode through a second contact hole defined through the passivation layer.Type: GrantFiled: November 28, 2012Date of Patent: April 22, 2014Assignee: LG Display Co., Ltd.Inventors: Il-Man Choi, Ho-June Kim
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Patent number: 8698983Abstract: An LCD device is disclosed which includes: a first substrate; a second substrate disposed to face the first substrate; a liquid crystal layer inserted between the first and second substrates; a cholesteric color filter layer disposed on the first substrate; and an auxiliary color filter layer disposed on the cholesteric color filter layer and formed to transmit a fixed wavelength band of light progressing in a front viewing direction of the cholesteric color filter layer and filter every wavelength band of light progressing in a side viewing direction of the cholesteric color filter layer except the fixed wavelength band of light.Type: GrantFiled: December 15, 2011Date of Patent: April 15, 2014Assignee: LG Display Co., Ltd.Inventor: Jong Hoon Woo
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Patent number: 8675154Abstract: A liquid crystal display device includes a liquid crystal display panel, a first polarizer between the liquid crystal display panel and a back light behind the liquid crystal display panel, the first polarizer including a first polarization film having a first transmission axis and a first phase-difference film having a first polarization axis, a second polarizer in front of the liquid crystal display panel, the second polarizer including a second polarization film having a second transmission axis intersecting the first transmission axis, a second phase-difference film having a second polarization axis intersecting the first polarization axis, and a third phase-difference film having a third polarization axis, and a substrate structure above the liquid crystal display panel and the second polarizer, the substrate structure includes a third polarizer in the substrate structure, the third polarizer including a fourth phase-difference film having a fourth polarization axis intersecting the third polarization axType: GrantFiled: December 9, 2010Date of Patent: March 18, 2014Assignee: Samsung Display Co., Ltd.Inventor: Won Sang Park
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Patent number: 8649098Abstract: A collimating image-forming apparatus comprising a first linear polarizer is disclosed. A first quarterwave plate is disposed adjacent the first polarizer and has its fast and slow axes at substantially 45° to the plane of polarization of the first polarizer. The apparatus further comprises a beam-splitting curved mirror having a convex surface adjacent the first polarizer and facing towards the first quarter-wave plate, a second quarter-wave plate adjacent the concave side of the curved mirror, the second quarterwave plate having its having its fast and slow axes oriented with respect to the corresponding axes of the first quarter-wave plate at angles substantially equal to a first integral multiple of 90°, and a reflective-transmissive polarizing member adjacent the second quarter-wave plate.Type: GrantFiled: May 2, 2011Date of Patent: February 11, 2014Assignee: Optical Resolutions, Inc.Inventors: Frank Ruhle, Paul Weissman
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Publication number: 20140028958Abstract: A liquid crystal display panel including a first substrate, a second substrate, pixel structures and a positive blue phase liquid crystal layer disposed between the first substrate and the second substrate is provided. The second substrate is disposed opposite to the first substrate. The pixel structures are disposed on the first substrate and between the first substrate and the second substrate. Each pixel structure includes a first electrode, a dielectric layer, a second electrode, and a third electrode. The first electrode is disposed on the first substrate. The dielectric layer covers the first electrode. The second electrode is disposed on the dielectric layer, overlapped with the first electrode and electrically connected to the first electrode. The third electrode is disposed on the dielectric layer and overlapped with the first electrode. The third electrode substantially surrounds the second electrode. The third electrode is spaced apart a distance from the second electrode.Type: ApplicationFiled: September 12, 2012Publication date: January 30, 2014Applicant: AU OPTRONICS CORPORATIONInventors: Szu-Yu Lin, Cheng-Yeh Tsai
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Patent number: 8587736Abstract: A stereoscopic image display device includes a display panel provided with a pixel array, a rendering processing unit that performs rendering for odd left image data and even right image data during an n-th frame period, and performs rendering for odd right image data and even left image data during a (n+1)-th frame period, a patterned retarder including a first retarder that transmits light so as to be modulated into first circularly polarized light and a second retarder that transmits light so as to be modulated into second circularly polarized light, active retarder glasses including a first active retarder that transmits one of the first circularly polarized light and the second circularly polarized light, and a second active retarder that transmits the remaining one of the first circularly polarized light and the second circularly polarized light, and a control unit that generates a switchable control signal.Type: GrantFiled: June 30, 2011Date of Patent: November 19, 2013Assignee: LG Display Co., Ltd.Inventor: Dongwoo Kang
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Patent number: 8570463Abstract: A liquid crystal display device includes: a liquid crystal panel; a first polarizing film and a second polarizing film on a bottom surface and a top surface, respectively, of the liquid crystal panel; a backlight unit below the first polarizing film; and a titanium oxide film on the second polarizing film and that transmits one of right-handed circularly polarized light and left-handed circularly polarized light and reflects the other, with a predetermined wavelength, of the right-handed circularly polarized light and the left-handed circularly polarized light.Type: GrantFiled: November 23, 2010Date of Patent: October 29, 2013Assignee: LG Display Co., Ltd.Inventors: Seung-Ho Park, Chul Nam, Hyong-Jong Choi
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Patent number: 8537310Abstract: A liquid crystal device includes a first polarization grating (101), a second polarization grating (102), and a liquid crystal layer (103). The first polarization grating (101) is configured to polarize and diffract incident light (190) into first and second beams (195,196) having different polarizations and different directions of propagation relative to that of the incident light (190). The liquid crystal layer (103) is configured to receive the first and second beams (195,196) from the first polarization grating (101). The liquid crystal layer (103) is configured to be switched between a first state that does not substantially affect respective polarizations of the first and second beams (195,196) traveling therethrough, and a second state that alters the respective polarizations of the first and second beams (195,196) traveling therethrough.Type: GrantFiled: October 9, 2008Date of Patent: September 17, 2013Assignee: North Carolina State UniversityInventors: Michael James Escuti, Chulwoo Oh, Ravi Komanduri, Brandon L. Conover, Jihwan Kim
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Patent number: 8537311Abstract: Various embodiments include devices and methods that allow a display device to, among other things, substantially match reflected color or luminance, or both, between a lens border and an active area of the display device. In one embodiment, a circular polarizer located external to a display area of the device is used. In one embodiment an additional quarter wave retarder located external to the display area is used.Type: GrantFiled: November 3, 2010Date of Patent: September 17, 2013Assignee: BlackBerry LimitedInventors: Bergen Albert Fletcher, Michael Lorne Purdy, Glover Ruiz Prieto, James Alexander Robinson
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Patent number: 8531627Abstract: A main object of the present invention is to provide a rotating plate hardly generating variation in the rotation angle of the liner polarization so as to easily realize a desired rotation angle, and a liquid crystal display device enabling observation of a bright image by use thereof even in a state with a polarizing glasses put on. To attain the object, the present invention provides an optical rotation plate comprising a transparent substrate, and an optical rotation layer formed on the transparent substrate and containing a rod-shaped compound for forming a cholesteric structure and having a function of rotating transmitted liner polarization, wherein the cholesteric structure has a 90 degrees or larger twist angle and a pitch in a range of 450 nm to 4,000 nm.Type: GrantFiled: December 23, 2009Date of Patent: September 10, 2013Assignee: Dai Nippon Printing Co., Ltd.Inventors: Satoru Hamada, Keiji Kashima, Takashi Kuroda, Hirofumi Yumoto
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Patent number: 8451421Abstract: The present invention is directed to the provision of an optical pickup apparatus in which a liquid crystal optical element constructed by combining an aberration correcting liquid crystal panel and an n?/4 liquid crystal panel in an integral fashion is mounted in a tilted position.Type: GrantFiled: February 16, 2007Date of Patent: May 28, 2013Assignee: Citizen Holdings Co., Ltd.Inventors: Shuji Naka, Shinya Sato
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Patent number: 8427609Abstract: Disclosed is a liquid crystal display device having a wide viewing angle in which compensation films are provided between a liquid crystal display panel and each polarizer so as to change polarized states of input and output light of the liquid crystal display panel via the polarizers, thereby preventing light leakage in a diagonal direction of the liquid crystal display device in a normally black mode.Type: GrantFiled: December 23, 2009Date of Patent: April 23, 2013Assignee: LG Display Co., Ltd.Inventor: Jeungphill Hanne
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Patent number: 8427602Abstract: Example embodiments relate to a backlight unit and a display apparatus employing the same. The backlight unit may include a light source; a polarization conversion unit configured to convert polarization of light incident from the light source; and a light guide plate configured to emit light incident through the polarization conversion unit. The light guide plate may include a plurality of light emitting portions configured to emit light through specular reflection. The light polarized by the polarization conversion unit may maintain its polarization state when it is subsequently emitted from the light guide plate.Type: GrantFiled: September 18, 2009Date of Patent: April 23, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Yong-kweun Mun, Hong-seok Lee, Yoon-sun Choi, Hoon Song
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Patent number: 8411230Abstract: A polarizer is provided comprising a subwavelength optical microstructure wherein the microstructure is partially covered with a light-transmissive inhibiting surface for polarizing light. The inhibiting surface can include a reflective surface, such as a metalized coating. The subwavelength optical microstructure can include moth-eye structures, linear prisms, or modified structures thereof A polarizing structure is further provided comprising a plurality of moth-eye structures stacked on one another for polarizing light.Type: GrantFiled: September 19, 2011Date of Patent: April 2, 2013Assignee: Orafol Americas Inc.Inventors: Robert B. Nilsen, Patrick W. Mullen, Michael J. Hanrahan, Edward D. Phillips
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Patent number: 8400591Abstract: A video image evaluation equipment of the present invention is capable of converting circularly-polarized light emitted from a circularly polarizing light source into linearly-polarized light so as to transmit an absorption-type linear polarizer by a wavelength plate to be incident on a liquid crystal panel. This makes it possible to enter and reflect light emitted from the circularly polarizing light source on the liquid crystal panel without loss, which leads to display brighter video images than conventional ones.Type: GrantFiled: April 16, 2009Date of Patent: March 19, 2013Assignee: Nitto Denko CorporationInventors: Hiroyuki Yoshimi, Kentarou Takeda, Hiroaki Sawada, Masaki Hayashi
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Publication number: 20130063686Abstract: A liquid crystal display device (100) of the present invention has a plurality of pixels (P) which are in a matrix arrangement and includes: a first substrate (1) which includes a pixel electrode (12) which is provided in each pixel; a second substrate (2) which opposes the first substrate; and a vertical alignment liquid crystal layer (3) which is provided between these substrates, wherein light that is incident on the liquid crystal layer is circularly-polarized light, and the liquid crystal layer modulates the circularly-polarized light, thereby realizing display. The pixel electrode includes at least one cruciform trunk portion (12a), a plurality of branch portions (12b) extending from the at least one cruciform trunk portion in a direction of about 45°, and a plurality of slits (12c) provided between the plurality of branch portions. The second substrate includes a plurality of counter electrodes (22) which are electrically independent of each other in each pixel.Type: ApplicationFiled: May 19, 2011Publication date: March 14, 2013Applicant: Sharp Kabushiki KaishaInventors: Kunihiro Tashiro, Hideki Fujimoto, Yoshihito Hara
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Patent number: 8395727Abstract: The present invention relates to a VA-mode liquid-crystal display device comprising a front-side polarizing element (14), a rear-side polarizing element (12), a VA-mode liquid-crystal cell (LC) disposed between the front-side polarizing element and the rear-side polarizing element, and a first retardation region (16) comprising one or more retardation layers between the rear-side polarizing element and the VA-mode liquid-crystal cell, wherein the first retardation region satisfies 0 nm?Re(590)?10 nm, and |Rth(590)|?25 nm. Re(?) means retardation (nm) in plane at a wavelength ? nm, and Rth(?) means retardation (nm) along the thickness direction at a wavelength ? nm.Type: GrantFiled: November 30, 2009Date of Patent: March 12, 2013Assignee: FUJIFILM CorporationInventor: Makoto Ishiguro
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Patent number: 8368849Abstract: There is provided a polarizer integrally containing view angle compensating film used in an in-plane switching liquid crystal display (IPS-LCD) filled with liquid crystal (??>0) having positive dielectric anisotropy and an in-plane switching liquid crystal display comprising the same. More particularly, there is provided an integrated polarizer capable of being used to manufacture a thin polarizer and securing a good view angle by employing a view angle compensating film as a protective film of a polarizing film forming the polarizer and an IPS-LCD comprising the same. The integrated polarizer comprises a polarizing film; a protective film attached to one surface of the polarizing film; and a +A plate coated with a +C plate attached to the other surface of the polarizing film. The +C plate is coated in the form of liquid crystals.Type: GrantFiled: March 24, 2009Date of Patent: February 5, 2013Assignee: LG Chem, Ltd.Inventors: Jnn-Won Chang, Dae-Hee Lee, Moon-Soo Park
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Publication number: 20130027642Abstract: An optical film includes a base film, thin film patterns, and cholesteric liquid crystals. The thin film patterns are disposed on the base film to be spaced apart from each other and have a first property corresponding to one of a hydrophilic property and a hydrophobic property. The cholesteric liquid crystals have the first property and are disposed on the thin film patterns to transmit one of a right-circularly polarized light and a left-circularly polarized light and reflect the other one of the right-circularly polarized light and the left-circularly polarized light. A display apparatus includes a light source unit emitting a light, a display panel receiving the light and controlling a transmittance of the light to display an image, and an optical film disposed between the light source unit and the display panel.Type: ApplicationFiled: February 9, 2012Publication date: January 31, 2013Inventors: Nakcho Choi, Hae-ju Yun
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Patent number: 8363184Abstract: In an LCD device, a circular polarizer is provided to each of two substrates that hold a liquid crystal layer. The circular polarizer on the display surface side includes a polarizer, ?/2 plate in which Rth>0, and a ?/4 plate in which Rth<0; and the circular polarizer on the backlight side includes a polarizer, a ?/2 plate in which Rth<0, and a ?/4 plate in which Rth>0. Rth is a retardation in the thickness direction of a ?/2 plate or a ?/4 plate. The absolute value of the sum of the Rth between the ?/2 plate for which Rth>0 and the ?/2 plate for which Rth<0 is reduced, and in the absolute value of the sum of the Rth between the ?/4 plate for which Rth<0 and the ?/4 plate for which Rth>0.Type: GrantFiled: May 3, 2011Date of Patent: January 29, 2013Assignees: NEC Corporation, NLT Technologies, Ltd.Inventors: Jin Matsushima, Ken Sumiyoshi, Shin-ichi Uehara
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Patent number: 8357936Abstract: An array substrate for an LCD device includes a gate line crossing a data line to define a pixel region. A thin film transistor (TFT) includes a gate electrode connected to the gate line, insulating and active layers on the gate electrode, a source electrode connected to the data line, and a drain electrode spaced apart from the source electrode. An auxiliary common electrode includes a horizontal portion disposed in the pixel region. A metal layer overlaps the insulating layer and contacts the horizontal portion of the auxiliary common electrode through a contact hole defined through the insulating layer. A passivation layer is disposed on the TFT and the metal layer. A pixel electrode has a horizontal portion overlapping the metal layer with the passivation layer therebetween to form a storage capacitor, the pixel electrode connected to the drain electrode through a second contact hole defined through the passivation layer.Type: GrantFiled: August 22, 2007Date of Patent: January 22, 2013Assignee: LG Display Co., Ltd.Inventors: Il-Man Choi, Ho-June Kim
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Patent number: 8350998Abstract: A retardation layer that includes regions causing different retardations can be manufactured easily. A retardation substrate includes a substrate and a solidified liquid crystal layer facing its main surface. The solidified liquid crystal layer includes first to third regions, and a degree of depolarization for each of the regions is less than 5.0×10?4. A difference between the maximum and minimum values of the degrees of depolarization obtained for the regions is less than 2.0×10?4.Type: GrantFiled: February 14, 2011Date of Patent: January 8, 2013Assignee: Toppan Printing Co., Ltd.Inventors: Sosuke Akao, Yuji Kubo, Noritaka Mihashi, Godai Fukunaga, Masashi Aimatsu, Takeshi Itoi
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Patent number: 8350997Abstract: A Liquid Crystal Display (LCD) device includes: a panel on which images are implemented; a backlight device below the panel and providing light; and a polarizer including a linear-polarizing layer over the panel that linear-polarizes light from the backlight device and a circular-polarizing layer over the linear-polarizing layer that circular-polarizes the linear-polarized light.Type: GrantFiled: December 15, 2008Date of Patent: January 8, 2013Assignee: LG Display Co., Ltd.Inventors: Mi-Kyung Lee, Ji-Yun Jang
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Patent number: 8345191Abstract: An optical component capable of changing polarization light state and a liquid crystal display (LCD) device using the same are provided. The optical component including a transparent substrate and a wavelength compensator is disposed at any position from the outer side of the LCD device to the outside in an output direction of an output light. The wavelength compensator is directly attached to the surface of the substrate to convert an output light of the LCD device from a linearly polarized light into a circularly polarized light or an elliptically polarized light, thereby effectively reducing eye fatigue. The LCD device is provided with such an optical component such that a linearly polarized light emerging from the LCD device is converted into a circularly polarized light or an elliptically polarized light to lessen the eye fatigue.Type: GrantFiled: December 28, 2007Date of Patent: January 1, 2013Assignee: TCL CorporationInventors: Xiaolin Yan, Dong Fu, Xiangwei Xie, Xianwen Sun, Hong Zhang, Weidong Huang
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Patent number: 8345206Abstract: A liquid crystal display includes a liquid crystal layer causing a selective reflection and exhibiting Kerr effect, first and second electrodes applying voltage to the liquid crystal layer, a first circular polarizer disposed between the liquid crystal layer and a viewer and allowing a first circularly polarized light incident on the liquid crystal layer when irradiated with a natural light, the first circularly polarized light having an electric-field vector rotating in a direction reverse to a rotation direction of an electric-field vector of a circularly polarized light selectively reflected by the liquid crystal layer, and a second circular polarizer facing the first circular polarizer with the liquid crystal layer interposed therebetween and allowing a second circularly polarized light incident on the liquid crystal layer when irradiated with a natural light.Type: GrantFiled: September 23, 2009Date of Patent: January 1, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Rei Hasegawa, Yuko Kizu, Hajime Yamaguchi
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Patent number: 8330911Abstract: A circular polarizer comprising a single linear polarizer producing a linear state of polarization and at least one phase retardation film layered with the single linear polarizer. In a first embodiment, the at least one phase retardation film includes at least one uniaxial A-plate phase retardation film and at least one uniaxial C-plate phase retardation film. In a second embodiment of the invention, the circular polarizer includes a linear polarizer and at least one biaxial phase retardation film layered with the linear polarizer. In another example of the circular polarize of the second embodiment, at least one uniaxial A-plate phase retardation film and/or at least one uniaxial C-plate phase retardation film is also layer with the linear polarize and the biaxial phase retardation film.Type: GrantFiled: April 18, 2008Date of Patent: December 11, 2012Assignee: University of Central Florida Research Foundation, Inc.Inventors: Qi Hong, Ruibo Lu, Xinyu Zhu, Thomas X. Wu, Shin-Tson Wu
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Patent number: 8314909Abstract: A liquid crystal display device 100 includes: a liquid crystal layer 1; a front substrate 3 and a rear substrate 2 between which the liquid crystal layer 1 is held; a pair of electrodes 4, 8 between which the liquid crystal layer 1 is interposed and which are configured to apply a voltage across the liquid crystal layer 1; circular polarizers 15, 16 respectively provided on a front side of the front substrate 3 and a rear side of the rear substrate 2; and first and second alignment films 13, 12 respectively provided between the liquid crystal layer 1 and the front substrate 3 and between the liquid crystal layer 1 and the rear substrate 2. The liquid crystal layer 1 includes, in each of the pixels, a continuous wall 10, a plurality of small sections 14 separated by the wall 10, and a plurality of liquid crystal regions 11, each of which is formed in any one of the plurality of small sections 14.Type: GrantFiled: October 28, 2008Date of Patent: November 20, 2012Assignee: Sharp Kabushiki KasiahaInventors: Yasushi Asaoka, Kiyoshi Minoura, Eiji Satoh, Sayuri Fujiwara
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Patent number: 8305690Abstract: A collimating image-forming apparatus comprising a first linear polarizer is disclosed. A first quarterwave plate (14) is disposed adjacent the first polarizer (12) and has its fast and slow axes at substantially 45° to the plane of polarization of the first polarizer. The apparatus further comprises a beam-splitting curved mirror (16) having a convex surface adjacent the first polarizer and facing towards the first quarter-wave plate, a second quarter-wave plate (22) adjacent the concave side of the curved mirror, the second quarterwave plate having its having its fast and slow axes oriented with respect to the corresponding axes of the first quarter-wave plate at angles substantially equal to a first integral multiple of 90°, and a reflective-transmissive polarizing member (24) adjacent the second quarter-wave plate.Type: GrantFiled: November 24, 2004Date of Patent: November 6, 2012Assignee: Optical Resolutions, Inc.Inventors: Frank Ruhle, Paul Weissman
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Patent number: 8300183Abstract: The present invention relates to a liquid crystal display, more specifically, to a single layer reflective full color cholesteric display employing full spectrum circularly polarization. The display has not only zero-field long time memory but also paper-like super high brightness and contrast.Type: GrantFiled: November 15, 2010Date of Patent: October 30, 2012Assignee: MacroDisplay Inc.Inventor: Yao-Dong Ma
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Patent number: 8293341Abstract: Provided is a cellulose ester film including a polycondensed ester which is obtained from a mixture containing an aromatic dicarboxylic acid, an aliphatic dicarboxylic acid, an aliphatic diol having an average carbon atom number of from 2.0 to 3.0 and a monocarboxylic acid, and both terminals of which are a monocarboxylic acid ester derivative.Type: GrantFiled: May 15, 2009Date of Patent: October 23, 2012Assignee: FUJIFILM CorporationInventors: Mamoru Sakurazawa, Yasuo Mukunoki, Akihiro Matsufuji, Hiroaki Sata
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Patent number: 8289482Abstract: The present invention in one aspect relates to a transflective liquid crystal display (LCD) comprising a plurality of pixels. Each pixel includes a first structure defining a reflective area and a transmissive area adjacent to the reflective area, a second structure positioned apart from the first structure to define a single cell gap therebetween, a liquid crystal layer positioned in the cell gap, and a plurality of electrodes formed on one of the first structure and the second structure such that at least two electrodes are positioned in the transmissive area and define a first distance, d1, therebetween, and at least two electrodes are positioned in the reflective area and define a second distance, d2, therebetween, where d2>d1, preferably, d2=?{square root over (2)}d1.Type: GrantFiled: December 16, 2009Date of Patent: October 16, 2012Assignee: Au Optronics CorporationInventors: Chia-Chiang Hsiao, Chih-Wen Chen, Li-Chih Hsu
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Patent number: 8284333Abstract: A 3D image display system includes a display equipment and a shutter glasses. The display equipment includes an LCD module. The LCD module has a linear polarizing unit and is able to generate an image light from the linear polarizing unit. The shutter glasses include two liquid crystal optical units, at least one linear polarizing unit, and at least one polarizing optical element. The linear polarizing unit is disposed between the polarizing optical element and the liquid crystal optical units. The image light passes through the polarizing optical element, the linear polarizing unit, and one of the liquid crystal optical units in sequence. When the image light passes through one of the liquid crystal optical units, the other liquid crystal optical unit blocks the image light.Type: GrantFiled: August 23, 2010Date of Patent: October 9, 2012Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Hsiang-Tan Lin, Chun-Chieh Chiu, Shih-Chieh Lin
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Publication number: 20120236292Abstract: An identification medium is provided in which latent image having plural colors can be observed even when the identification medium is spaced away from a polarization filter. A cholesteric liquid crystal layer is provided as a specific polarization light reflection layer which reflects light having a specific polarized condition. An optical anisotropic layer having an optical anisotropy is provided at an upper position overlapping with the specific polarization light reflection layer. An image A formed by an area having an optical anisotropy different from that of surroundings is formed at the optical anisotropic layer. When the identification medium is directly viewed, the influence of the optical anisotropy cannot be seen. When the identification medium is observed via a circular polarization filter, the image can be seen to have a specific color by the influence of the optical anisotropy.Type: ApplicationFiled: November 12, 2010Publication date: September 20, 2012Applicant: NHK SPRING CO., LTD.Inventors: Hidekazu Hoshino, Itsuo Takeuchi, Tokio Sakauchi, Seiya Shibuya, Tohru Ida
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Patent number: 8269904Abstract: A stereoscopic TFT-LCD with a wire grid polarizer affixed to internal surfaces substrates is provided wherein a thin film polarizing film formed by accurately processing a thin aluminum film, a polarizing film of a nano imprint lithography method that uses polymer, and a polarizing film and a liquid crystal material that form a polarizing nano material thin film by uniformly coating a polarizing nano material (TCF), wherein a second 1/2 phase retardation plate and a transparent unit are formed integrally with each other on the same plane in a chessboard shape, wherein a third polarizing region and a fourth polarizing region are formed integrally with each other on the same plane in a chessboard shape, and wherein a 1/4 phase retardation plate is disposed at a front surface of the second transparent substrate so as to produce circularly-polarized light.Type: GrantFiled: March 2, 2012Date of Patent: September 18, 2012Assignee: Pavonine Inc.Inventor: Sung-Jung Lee