Passive Liquid Crystal Polarizer Patents (Class 349/194)
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Publication number: 20130044267Abstract: Disclosed is an optical film for 3D image display devices, comprising at least an optically-anisotropic layer formed of a composition that comprises, as the main ingredient thereof, a polymerizable liquid crystal, and a polarizing film having an absorption axis in the direction at 45° to an arbitrary side, wherein the total of retardation along the thickness direction at a wavelength of 550 nm Rth(550) of all the members including the optically-anisotropic layer disposed on one face of the polarizing film is from ?100 to 100 nm.Type: ApplicationFiled: May 14, 2012Publication date: February 21, 2013Inventors: Makoto ISHIGURO, Shinichi MORISHIMA
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Publication number: 20130044286Abstract: An optical film, a circular polarizing plate, and a display device are provided. The optical film may exhibit a desired phase retardation property in a wide wavelength range even when it is relatively thin. The optical film may exhibit the 1/4 wavelength phase retardation property. The optical film may be manufactured by a simple process. The optical film may be used in LCDs such as a reflective LCD, or OLEDs.Type: ApplicationFiled: August 13, 2012Publication date: February 21, 2013Inventors: Hyuk YOON, Byoung Kun JEON, Moon Soo PARK
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Patent number: 8363183Abstract: The present invention is a lengthy-shaped polarizing plate comprising a linearly-polarized light separation element, a linear light polarizing film and a protection film in this order, wherein said linearly-polarized light separation element includes a layer composed of a resin A whose inherent birefringence value is negative and has a linearly-polarized light transmission axis in a crosswise direction.Type: GrantFiled: February 25, 2010Date of Patent: January 29, 2013Assignee: Zeon CorporationInventors: Taku Hatano, Shunsuke Yamanaka, Kouhei Arakawa
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Patent number: 8363204Abstract: The present invention relates to an optical enhancement film, more specifically, to a cholesteric reflective polarizer film, which is characterized by matching and compensating the emitting spectrum of a white LED backlight for LCD TVs and Monitors. The film not only enhances the brightness of the LED-backlit displays by light recycling effect but also increases the color rendering quality of the LED-backlit displays by phase balancing effect.Type: GrantFiled: December 8, 2010Date of Patent: January 29, 2013Assignee: MacroDisplay Inc.Inventor: Yao-Dong Ma
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Publication number: 20120314159Abstract: Provided is an optical film laminate with a thinner thickness having an optical compensation function. According to the present invention is provided an optical film laminate comprising (i) a positive C plate comprising a liquid crystal material having a photosensitive group and (ii) a positive A plate, an optically biaxial plate, or an O plate, these plate comprising a liquid crystal material having a photosensitive group; wherein the both plates are directly bonded with each other to be firmly laminated without adhesive.Type: ApplicationFiled: June 8, 2012Publication date: December 13, 2012Applicant: HAYASHI ENGINEERING INC.Inventor: Takeya SAKAI
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Publication number: 20120314180Abstract: A polarization conversion element includes a phase reversal element and a polarization plane rotation element including a liquid crystal layer. The liquid crystal layer has a plurality of regions disposed along circumferential direction with the intersection point of the polarization lane rotation element and the optical axis as the center with alignment directions different from each other. When electric voltage in accordance with the wavelength of linear polarization incident on the polarization plane rotation element is applied, each region rotates the polarization plane of the polarization component transmitted by each region, and thereby converts linear polarization to radial polarization. The phase reversal element reverses, among the first and the second annular portions alternately disposed along the radial direction with the optical axis as the center, the phase of light incident on the first annular portion relative to the phase of light incident on the second annular portion.Type: ApplicationFiled: February 24, 2011Publication date: December 13, 2012Applicant: CITIZEN HOLDINGS CO., LTD.Inventors: Nobuyuki Hashimoto, Makoto Kurihara, Kenji Matsumoto, Masafumi Yokoyama, Ayano Tanabe
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Publication number: 20120287358Abstract: Disclosed is an optical film in which a minute interference unevenness is reduced. The optical film comprises a transparent film having a thickness of 10 ?m to 150 ?m, and a first layer and a second layer, in this order, on the transparent film, wherein values of in-plain mean refractive indices thereof satisfy the formula: the second layer>the first layer>the transparent film; the difference in in-plane mean refractive indices between the first layer and the second layer and the difference in in-plane mean refractive indices between the first layer and the transparent film are each 0.02 or more; and the optical thickness D of the first layer satisfies the formula: 270×N?150?75 nm?D?270×N?150+75 nm (1?N?8 where N is a natural number).Type: ApplicationFiled: April 30, 2012Publication date: November 15, 2012Applicant: FUJIFILM CORPORATIONInventors: Humitake MITOBE, Yuusuke FURUKI
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Publication number: 20120281280Abstract: A birefringent device, which is configured to be mounted in an optical path of an optical system, has an effective area in a pupil plane. The birefringent device affects different polarization states differently and position-dependently. The birefringent device realizes a first pupil function assigned to a first polarization state and a second different pupil function assigned to a second polarization state. The pupil functions may be optimized to achieve various specific optical properties like extended depth of field.Type: ApplicationFiled: October 14, 2010Publication date: November 8, 2012Applicant: SONY CorporationInventors: Daniel Buehler, Markus Kamm, Marco Hering
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Publication number: 20120257129Abstract: 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: ApplicationFiled: June 19, 2012Publication date: October 11, 2012Applicant: LG Chem, Ltd.Inventors: Eun Mi SEO, Sin Young Kim, Kyun Il Rah, Moon Soo Park, Seung Hun Chae
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Patent number: 8279363Abstract: A three-dimensional (3D) display apparatus is provided. The 3D display apparatus includes a display device, a twisted nematic (TN) liquid crystal panel, and a lens unit. The display device is configured to output first polarized lights of an image. The TN liquid crystal panel is coupled to the display device and containing a plurality of controllable pixel display areas to receive the polarized lights with a first polarization direction from the display device. Each pixel display area is capable of being in a first state in which the first polarization direction is transformed into a second polarization direction different from the first polarization direction and a second state in which the first polarization direction is maintained.Type: GrantFiled: October 18, 2010Date of Patent: October 2, 2012Assignee: SuperD Co., Ltd.Inventors: Zhang Ge, Fuzhong Guo
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Publication number: 20120242949Abstract: A manufacturing method of a phase retarding film, a manufacturing method of a stereoscopic display apparatus, and a phase retarding film are provided. A light transmissive substrate is provided. An alignment layer is formed on the light-transmissive substrate. The alignment layer is aligned. A birefringent material film is formed on the alignment layer. A reaction-causing light is used to expose a first patterned region of the birefringent material film to induce a reaction on the first patterned region, wherein a second patterned region of the biregringent material film is not exposed to the reaction-causing light. The second patterned region of the biregringent material film is removed.Type: ApplicationFiled: May 22, 2011Publication date: September 27, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventor: Chia-Tai Chen
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Publication number: 20120229752Abstract: A display screen includes a substrate comprising a first surface and a second surface opposite to the first surface; a beam-splitting polarizer formed on a first surface of the substrate; and a non-conductive metal layer formed on a second surface of the substrate. The beam-splitting polarizer is a cholesterol liquid crystalline polarization layer.Type: ApplicationFiled: June 27, 2011Publication date: September 13, 2012Applicants: FIH (HONG KONG) LIMITED, SHENZHEN FUTAIHONG PRECISION INDUSTRY CO., LTD.Inventors: QI-JIAN DU, CHWAN-HWA CHIANG
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Publication number: 20120224126Abstract: A liquid crystal film (LCF) 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: ApplicationFiled: May 17, 2012Publication date: September 6, 2012Inventors: Jun Won CHANG, Moon Soo Park, Dae Hee Lee
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Publication number: 20120194765Abstract: Disclosed herein are an integrated O film for improving a viewing angle of a TN-LCD, and a polarizer plate and TN-LCD including the same. Also disclosed herein are a compensation film which is capable of improving a contrast characteristic at a front side and an inclination angle and minimizing a color variation according to a viewing angle in a dark state, and a polarizer plate and TN-LCD including the same. The integrated O film includes a transversely-stretched negative biaxial (B) film and a positive O film laminated on the transversely-stretched negative B film.Type: ApplicationFiled: December 27, 2011Publication date: August 2, 2012Inventors: Byoung Kun JEON, Sergey Belyaev, Chang-Hun Yun, Moon-Soo Park
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Patent number: 8223333Abstract: A liquid crystal display (LCD) device testing apparatus that comprises a stage configured in an air-floating structure to feed a liquid crystal panel including combined upper and lower substrates, a backlight unit configured to include a light source for an emission of light disposed under the stage, a protective film formed to encompass and protect the light source, and a lower polarizing plate formed on the protective film to firstly polarize light emitted from the light source in a fixed axis direction, an upper polarizing plate separated from the upper surface of the liquid crystal panel by a fixed distance to secondarily polarize light from the liquid crystal panel in the fixed axis direction; and a charge couple device (CCD) camera disposed on the upper polarizing plate to scan an image on the liquid crystal panel using light secondarily polarized by the upper polarizing plate.Type: GrantFiled: December 3, 2009Date of Patent: July 17, 2012Assignee: LG Display Co., Ltd.Inventor: Tae Man Kim
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Patent number: 8218123Abstract: A polarization converting system and a method of manufacturing the same are provided. The polarization converting system includes a polarization splitting unit splitting incident unpolarized light into two orthogonal polarizations and a polarization converting unit converting incident light into specific polarized light. The polarization converting unit has first and second regions that correspond to the polarization splitting unit and are different in a polarization converting extent from each other.Type: GrantFiled: August 23, 2010Date of Patent: July 10, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Seong-mo Hwang, Seung-ho Nam, Moon-gyu Lee, Young-chan Kim, Dong-ho Wee, Kyung-yeup Kim
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Publication number: 20120169970Abstract: An optical film includes, in the following order: a transparent support; an oriented film; an optically anisotropic layer; and a hardcoat layer, the oriented film is directly contacted with the optically anisotropic layer and the optically anisotropic layer is directly contacted with the hardcoat layer, the optically anisotropic layer is formed from a composition containing a liquid crystalline compound having an unsaturated double bond, the optically anisotropic layer and the hardcoat layer are connected with a covalent bond, and in-plane retardation of the optical film at a wavelength of 550 nm is from 80 to 200 nm and retardation in a direction of thickness of the optical film at a wavelength of 550 nm is from ?70 to 70 nm.Type: ApplicationFiled: January 4, 2012Publication date: July 5, 2012Applicant: FUJIFILM CORPORATIONInventors: Kenichi FUKUDA, Yuta TAKAHASHI
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Publication number: 20120147315Abstract: The present invention relates to an optical enhancement film, more specifically, to a cholesteric reflective polarizer film, which is characterized by matching and compensating the emitting spectrum of a white LED backlight for LCD TVs and Monitors. The film not only enhances the brightness of the LED-backlit displays by light recycling effect but also increases the color rendering quality of the LED-backlit displays by phase balancing effect.Type: ApplicationFiled: December 8, 2010Publication date: June 14, 2012Inventor: Yao-Dong Ma
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Publication number: 20120147300Abstract: An optical film includes, in the following order: an optically anisotropic layer; a transparent support; and a hardcoat layer, in-plane retardation of the optical film at a wavelength of 550 nm is from 80 to 200 nm and retardation in a direction of thickness of the optical film at a wavelength of 550 nm is from ?70 to 70 nm.Type: ApplicationFiled: November 30, 2011Publication date: June 14, 2012Applicant: FUJIFILM CORPORATIONInventors: Kenichi FUKUDA, Yuta TAKAHASHI
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Publication number: 20120140161Abstract: A polymer film, containing a merocyanine compound having ?max of not longer than 375 nm, and a compound represented by formula (II), which is different from said at least one merocyanine compound, is disclosed. In the formula, R1 and R2 each independently represent a hydrogen atom, alkyl group, aryl group, heterocyclic group, cyano, N-alkyl- or N-aryl carbamoyl group, aryloxy carbonyl group or —CH2COOR5, or R1 and R2 bind to each other to form a ring containing a nitrogen atom; R5 represents an alkyl group, aryl group or a heterocyclic group; R3 and R4 each independently represent a substituent having a Hammett substituent constant ?p of equal to or more than 0.2, or R3 and R4 bind to each other to form a cyclic active methylene compound structure.Type: ApplicationFiled: November 28, 2011Publication date: June 7, 2012Applicant: FUJIFILM CorporationInventors: Shigeaki NIMURA, Ryo Nakamura, Shunya Katoh, Masayoshi Toyoda, Hiroko Kamee, Masuji Motoki, Masaki Noro, Hiroshi Inada
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Patent number: 8189165Abstract: A liquid-crystalline coating fluid comprises: a lyotropic liquid crystal compound; a vinyl alcohol-based polymer; and a solvent, wherein 0.05 to 1.5 weight parts of vinyl alcohol-based polymer is contained with respect to 100 weight parts of the lyotropic liquid-crystal compound.Type: GrantFiled: November 18, 2008Date of Patent: May 29, 2012Assignee: Nitto Denko CorporationInventors: Toru Umemoto, Toshimasa Nishimori, Tadayuki Kameyama
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Publication number: 20120113380Abstract: The present invention relates generally to the field of organic chemistry and particularly to the nematic lyotropic liquid crystal solution and negative dispersion retardation plate for application in 3D liquid crystal displays. The negative dispersion retardation plate comprises a substrate, and at least one optically anisotropic retardation layer comprising a multi-component guest-host composition coated onto the substrate.Type: ApplicationFiled: November 6, 2011Publication date: May 10, 2012Applicant: Crysoptix KKInventors: Arthur Geivandov, Pavel Ivan Lazarev, Serguei Palto
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Publication number: 20120105795Abstract: It is possible to obtain a polarizing film having a high dichroic ratio by using a liquid-crystalline coating solution in which a small quantity of a second lyotropic liquid-crystalline low-molecular compound is mixed with a first lyotropic liquid-crystalline low-molecular compound. The second lyotropic liquid-crystalline low-molecular compound has a mole number smaller than the first lyotropic liquid-crystalline low-molecular compound. The molecular size of the second lyotropic liquid-crystalline low-molecular compound is smaller than that of the first lyotropic liquid-crystalline low-molecular compound.Type: ApplicationFiled: July 1, 2010Publication date: May 3, 2012Applicant: Nitto Denko CorporationInventors: Shoichi Matsuda, Tadayuki Kameyama, Sadahiro Nakanishi, Toru Umemoto
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Publication number: 20120075568Abstract: An optical film, a reflective polarizing plate and a display device are provided. For example, the optical film may be used in the reflective polarizing plate which may enhance the efficiency of light utilization of a display device such as a liquid crystal display device and improve the brightness.Type: ApplicationFiled: September 23, 2011Publication date: March 29, 2012Applicant: LG CHEM, LTD.Inventors: Jun Won CHANG, Dae Hee LEE, Moon Soo PARK, Sergey BELYAEV
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Publication number: 20120062822Abstract: A liquid crystal display includes a first substrate having a first alignment layer, a second substrate having a second alignment layer, a liquid crystal layer having liquid crystal molecules operating in a twisted nematic (TN) mode, a first polarizing film, a second polarizing film, and a phase difference compensation film. The phase difference compensation film has a delay axis to compensate for an undesired phase difference imposed by the NT operating liquid crystal layer on light, traveling through the liquid crystal layer when an ideally fully untwisting electric field is applied to the liquid crystal layer, and the delay axis forms an acute angle with a rubbing direction of the second alignment layer.Type: ApplicationFiled: August 15, 2011Publication date: March 15, 2012Inventors: Hee Wook DO, Duckjong SUH, Jung-Hun LEE, Boo-Kan KI, Min Oh CHOI, Sang-Gu LEE
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Publication number: 20120062784Abstract: Certain exemplary embodiments can provide a system, machine, device, manufacture, circuit, composition of matter, and/or user interface adapted for and/or resulting from, and/or a method and/or machine-readable medium comprising machine-implementable instructions for, activities that can comprise and/or relate to, managing one or more images, such as those related to an optical system.Type: ApplicationFiled: September 14, 2011Publication date: March 15, 2012Inventors: Anthony Van Heugten, Dwight Duston
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Publication number: 20120062829Abstract: A liquid-crystal coating fluid which comprises: an azo compound represented by the following general formula (1); and a solvent to dissolve the azo compound: wherein Q1 is an aryl group which may have any substituent group; Q2 is an arylene group which may have any substituent group; R is a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, an acetyl group, a benzoyl group, or a phenyl group which may have any substituent group; and M is a counter ion.Type: ApplicationFiled: June 17, 2010Publication date: March 15, 2012Applicant: NITTO DENKO CORPORATIONInventors: Shoichi Matsuda, Kyoko Ishii, Tadayuki Kameyama
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Publication number: 20120038862Abstract: A liquid crystal display panel and a color filter substrate are provided. The color filter substrate includes a substrate, a stacked layer, a phase compensation film and a second alignment film. The stacked layer is disposed on the substrate and includes a first alignment film and a color filter layer having a phase compensation effect, wherein the first alignment film and the first alignment film are stacked on each other. The phase compensation film is disposed on the stacked layer. The second alignment film is disposed on the phase compensation film. Therefore, a number of fabrication processes of the color filter substrate can be reduced.Type: ApplicationFiled: October 14, 2010Publication date: February 16, 2012Applicant: AU OPTRONICS CORPORATIONInventors: Yi-Hau Shiau, Hsin-An Cheng, Norio Sugiura, Pei-Chuan Yeh, Wang-Shou Kao
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Patent number: 8104895Abstract: A display system includes a projection screen and a projector. The projection screen includes a retarder plate between a polarizer and a transparent screen. The projector projects an image through the polarizer and the retarder plate onto the transparent screen. The image is visible from a first side of the transparent screen but invisible from a second side of the transparent screen because any light passing twice through the retarder plate is blocked by the polarizer.Type: GrantFiled: November 12, 2010Date of Patent: January 31, 2012Inventor: Cang V. Quach
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Publication number: 20120013834Abstract: Provided are a liquid crystal film, a method of manufacturing a liquid crystal film, a method of controlling an average tilt angle of the liquid crystal film, a polarizing plate, and a liquid crystal display device. A liquid crystal film that has excellent properties including durability and an optical property and is capable of being effectively used for various uses may be provided. In addition, the physical properties of the liquid crystal film may be easily controlled according to a desired use.Type: ApplicationFiled: July 18, 2011Publication date: January 19, 2012Applicant: LG CHEM, LTD.Inventors: Su Young RYU, Byoung Kun Jeon, Moon Soo Park, Sin Young Kim, Hyuk Yoon, Hyoung Gu Kang, Sang Jun Yoon
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Publication number: 20110317084Abstract: A patterned retardation film includes: a substrate; a first alignment film and a second alignment film disposed on the substrate, processed by different alignment processes and having different alignment directions; and a liquid crystal layer disposed on the first alignment film and the second alignment film, wherein the liquid crystal layer is patterned into a first region, which is aligned by the first alignment film, and a second region, which is aligned by the second alignment film.Type: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Applicant: LG CHEM, LTD.Inventors: Dae-Hee LEE, Sin-Young Kim, Moon-Soo Park
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Publication number: 20110299025Abstract: Herein are disclosed methods by which a layer of oriented chromonic material may be transferred from a flexible substrate to a receiving substrate, so as to form a subassembly for use in the assembly of liquid crystal cells. The oriented chromonic material layer may function as an alignment layer for aligning liquid crystal material, and may also incorporate a pleochroic dye so to function as a polarizing layer. An oriented chromonic material layer of relatively large area can be transferred, which enables the production of relatively large liquid crystal cells for use in, e.g., autodarkening filters such as used for eye protection in welding operations. Curved liquid crystal cells are also disclosed.Type: ApplicationFiled: February 10, 2010Publication date: December 8, 2011Inventors: Hassan Sahouani, Feng Bai
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Patent number: 8064137Abstract: An optical system that projects a real image to a location in free space and includes one or more features located along the optical path that enhance the viewability of the real image. The optical system includes a converging element for converging a portion of source light so as to form the real image. One viewability-enhancing feature is the use of a broadband reflector-polarizer having high transmitting and reflecting efficiencies. Another viewability-enhancing feature is the use of polarizing elements having substantially matched bandwidth responses and/or comprising an achromatic design. An additional viewability-enhancing feature is the use of a wide-view film to increase the viewing angle of the image.Type: GrantFiled: July 6, 2007Date of Patent: November 22, 2011Assignee: PC Mirage, LLCInventor: Bruce D. Dike
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Patent number: 8064035Abstract: A polarizer including a polarization grating comprising a polarization sensitive photo-alignment layer and a liquid crystal composition arranged on said photo-alignment layer. An alignment pattern, corresponding to the polarization pattern of a hologram, is recorded in the photo-alignment layer, and the liquid crystal composition is aligned on the photo-alignment layer.Type: GrantFiled: January 7, 2010Date of Patent: November 22, 2011Assignee: Stichting Dutch Polymer InstituteInventors: Michael J. Escuti, Carlos Sanchez, Cornelis W. M. Bastiaansen, Dirk J. Broer
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Publication number: 20110273658Abstract: Grating grooves of a predetermined shape are filled with a polymerizable liquid crystal, and thereafter, the polymerizable liquid crystal is cured to form a striped structure including a uniaxial polymer liquid crystal having an alignment orientation identical to the longitudinal direction of the grating grooves, without using a liquid crystal alignment film. Consequently, it is possible to stably and effectively align the polymer liquid crystal without using an alignment film and to adjust the film thickness easily, whereby a polarization splitting element exhibiting a high and uniform split efficiently can be obtained stably.Type: ApplicationFiled: March 5, 2010Publication date: November 10, 2011Applicant: HITACHI MAXELL, LTD.Inventors: Eiji Koyama, Tomonori Kanai, Masaki Mukoh
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Patent number: 8054442Abstract: A low color shift polarizer assembly is provided, comprising a cholesteric liquid crystal film with a plurality of very tiny grooves which are irregularly dispersed on a surface of the cholesteric liquid crystal film. The selective reflective wavelength range of the cholesteric liquid crystal film has a long wavelength boundary ?700 nm and a short wavelength boundary ?420 nm. A quarter wavelength retardation plate can be disposed on the cholesteric liquid crystal film to build up the final low color shift polarizer assembly. The polarizer assembly can be combined with a backlight unit and further with a liquid crystal display to provide low color shift at large viewing angles and high brightness.Type: GrantFiled: April 30, 2009Date of Patent: November 8, 2011Assignee: Industrial Technology Research InstituteInventors: Hui-Lung Kuo, Mei-Chih Peng, Pin-Chen Chen, Ying-Jui Lin
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Patent number: 8035775Abstract: A polarization control system which includes an E-type polarizer and therefore can provide excellent dark state at a wide azimuth and viewing angle. Further, the polarization control system includes a viewing angle control element for controlling a traveling direction of light which has passed through the E-type polarizer and therefore can provide excellent bright state at a wide azimuth and viewing angle. Further a display device is disclosed including such a polarization control system. The polarization control system is a polarization control system including a plurality of polarizers, wherein the polarization control system includes an E-type polarizer and a viewing angle control element, and the viewing angle control element controls a traveling direction of light which has passed through the E-type polarizer.Type: GrantFiled: July 18, 2007Date of Patent: October 11, 2011Assignee: Sharp Kabushiki KaishaInventor: Akira Sakai
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Publication number: 20110234946Abstract: A transparent product that gives an image only at one side, which can be used for an advertisement on the window or the like, which is a product that has a semi-transmissive-half-reflective layer having transmittance of 30% or higher and a reflectance of 30% or higher, a birefringent layer which is a patterned optically anisotropic layer having two or more regions of different birefringence in the form of a pattern or a driven-type optically anisotropic layer containing a liquid-crystal compound driven by voltage application to control the optical anisotropy, and a polarizing layer in this order and does not have, at the opposite side of the polarizing layer with respect to the birefringent layer, a polarizing layer, is provided.Type: ApplicationFiled: March 25, 2011Publication date: September 29, 2011Applicant: FUJIFILM CORPORATIONInventors: Ichirou AMIMORI, Kouki TAKAHASHI, Satomi SUZUKI, Hideki KANEIWA
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Publication number: 20110228178Abstract: A polarization beam splitter (PBS) includes a first prism, a second prism, an alignment layer, and a cholesteric liquid crystal (CLC) layer. The first prism has two first surfaces adjacent to each other and a first slanted surface that forms a first included angle with the two first surfaces, respectively. The second prism has two second surfaces adjacent to each other and a second slanted surface that forms a second included angle with the two second surfaces, respectively. The second slanted surface is opposite to the first slanted surface. The alignment layer is disposed on the first slanted surface of the first prism. The CLC layer is disposed between the alignment layer and the second slanted surface of the second prism.Type: ApplicationFiled: March 16, 2010Publication date: September 22, 2011Applicant: HIMAX DISPLAY, INC.Inventors: Chien-Tang Wang, Kuan-Hsu Fan-Chiang, Yen-Chen Chen
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Patent number: 8023098Abstract: Provided is a production method for a thin birefringent film with a satisfactory alignment property, in which a refractive index is controlled three-dimensionally and optical properties are unlikely to decrease in the case where the birefringent film is placed under high temperature and high humidity. The production method for a birefringent film of the present invention includes: the step (1) of preparing a solution that exhibits a nematic liquid crystal phase, containing at least one kind of polycyclic compound containing a —SO3M group and/or a —COOM group (M represents a counter ion) and a solvent; the step (2) of preparing a base material at least one surface of which is subjected to a hydrophilization treatment; and the step (3) of applying the solution prepared in the step (1) to the surface of the base material prepared in the step (2), the surface being subjected to the hydrophilization treatment, followed by drying, in which a contact angle of water at 23° C.Type: GrantFiled: August 29, 2007Date of Patent: September 20, 2011Assignee: Nitto Denko CorporationInventors: Junzo Miyazaki, Shouichi Matsuda
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Patent number: 8013953Abstract: An object of the present invention is to provide a liquid crystal display device having a wide view angle, reduced power consumption and high quality with an absorption axis of a polarizing plate and an optical axis of a retardation plate made to coincide with high accuracy without using expensive equipment and complicated steps. On a transparent substrate 11 is formed a retardation film 21 that is self-organized due to irregularities on a surface of a metal wire 12 formed on a wire grid polarizer to thereby generate a retardation.Type: GrantFiled: January 17, 2008Date of Patent: September 6, 2011Assignee: Hitachi, Ltd.Inventors: Masaki Matsumori, Yasushi Tomioka, Katsuyuki Funahata
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Publication number: 20110194052Abstract: In a display device which includes: a first substrate; a second substrate; and a thin film polarizer which is directly formed on a surface of the second substrate on a side opposite to the first substrate, the thin film polarizer includes a polarization element film and a protection layer which is laminated to the polarization element film, the polarization element film is made of an aligned lyotropic liquid crystal material, and the protection layer has a refractive index smaller than a refractive index of the polarization element film in a transmission axis direction. The protection layer may have a thickness smaller than a thickness of polarization element film.Type: ApplicationFiled: February 8, 2011Publication date: August 11, 2011Inventors: Takato Hiratsuka, Masaya Adachi, Hiroshi Sasaki, Miharu Otani
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Publication number: 20110176074Abstract: A three-dimensional (3D) display apparatus is provided. The 3D display apparatus includes a display device, a twisted nematic (TN) liquid crystal panel, and a lens unit. The display device is configured to output first polarized lights of an image. The TN liquid crystal panel is coupled to the display device and containing a plurality of controllable pixel display areas to receive the polarized lights with a first polarization direction from the display device. Each pixel display area is capable of being in a first state in which the first polarization direction is transformed into a second polarization direction different from the first polarization direction and a second state in which the first polarization direction is maintained.Type: ApplicationFiled: October 18, 2010Publication date: July 21, 2011Inventors: ZHANG GE, FUZHONG GUO
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Patent number: 7982828Abstract: The present invention provides a polarization switching liquid crystal element 1 having TN liquid crystal 7 retained between two transparent substrates 2a and 2b for transmitting at least visible polarized light with the polarized light transmission axis selectively rotated by 90 degrees when a voltage is selectively applied to the TN liquid crystal 7, wherein a phase difference u of said TN liquid crystal 7 is defined by the following equation: u=2×?n×d/?, where ?n is the refractive index anisotropy of said TN liquid crystal 7, d is the thickness of said TN liquid crystal 7, and ? is the wavelength of said polarized light, and a transmittance T of said polarization switching liquid crystal element measured with polarization plates on the incident and outgoing sides is defined by the following equation: T=(½)×sin2{?(1+u2)1/2/2}/(1+u2), and wherein the phase difference u includes a value 1.7 and the transmittance T is 0.1 or lower when the ? ranges from 400 nm to 700 nm.Type: GrantFiled: April 29, 2008Date of Patent: July 19, 2011Assignee: Olympus CorporationInventor: Kazuya Yamanaka
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Patent number: 7978302Abstract: A method for the manufacture of a polarizer is provided. The method comprises providing a liquid crystal composition comprising a liquid crystal host and a viscosity enhancer; providing a thin film of said composition on a substrate; orienting said liquid crystal host to obtain an aligned film in a first liquid crystal mesophase, wherein the liquid crystal host is aligned planar to said substrate; gelating said viscosity enhancer to congeal said film; and obtaining a second liquid crystal state in said congealed film. By the use of a viscosity enhancer in the composition, homeotropic alignment of the liquid crystal host can be suppressed.Type: GrantFiled: June 23, 2006Date of Patent: July 12, 2011Assignee: Sumitomo Chemical Co. Ltd.Inventors: Emiel Peeters, Dirk Jan Broer
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Publication number: 20110157540Abstract: Provided are a polarizer and an organic light-emitting display device including the same. The organic light-emitting display device may be protected by enabling the polarizer to effectively absorb external impact.Type: ApplicationFiled: April 29, 2010Publication date: June 30, 2011Applicant: Samsung Mobile Display Co., LTD.Inventors: WOO-SUK JUNG, Soon-Ryong Park, Duk-Jin Lee, Sa-Bang Um, Jung-Jun Im
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Patent number: 7963657Abstract: An imager is shifted with respect to an optical axis of a refractive optical system. Thereby, a throw distance of a projector is shortened. A wavelength-selective half wavelength plate for rotating a polarization direction of green light beams is disposed between a dichroic prism and the refractive optical system in such a manner that the polarization direction of the green light beams is in parallel to the shifting direction. Thereby, the green light beams are incident onto the refractive optical system as P-polarized beams, whereby a transmittance of the green light beams in the refractive optical system is increased, while suppressing lowering of the light amount of the green light beams, and color non-uniformity resulting from lowering of the light amount of the green light beams.Type: GrantFiled: March 11, 2008Date of Patent: June 21, 2011Assignee: SANYO Electric Co., Ltd.Inventors: Ryuhei Amano, Michihiro Okuda
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Publication number: 20110141430Abstract: There is provided a polarizing film exhibiting a stable and high dichroic ratio by forming a film using a water solution in which a metal capture agent has been added, even if multivalent metal cations are included.Type: ApplicationFiled: April 9, 2009Publication date: June 16, 2011Applicant: NITTO DENKO CORPORATIONInventors: Kyoko Nishiguchi, Shoichi Matsuda, Tadayuki Kameyama
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Patent number: 7940368Abstract: The Terahertz Polarizer structure of the present invention comprises of: A pair of parallel quartz layers for forming a rectangular cube with internal space, then a birefringent liquid crystal is placed in the internal space and sealed, and a pair of permanent magnets with reverse polarities are placed at both sides of the pair of fused silica layers.Type: GrantFiled: October 1, 2008Date of Patent: May 10, 2011Assignee: National Chiao Tung UniversityInventors: Ru-Pin Chao, Ci-Ling Pan, Cho-Fan Hsieh, Yu-Chien Lai
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Publication number: 20110025954Abstract: A retardation substrate is provided, which includes a substrate and an optically anisotropic solidified liquid crystal layer which is supported by the substrate and formed as a continuous film made from a same material. The solidified liquid crystal layer comprises first to third regions each having two sub-regions which are a sub-region A and a sub-region B, an in-plane birefringence of the 1A sub-region is larger than that of the 2A sub-region, the in-plane birefringence of the 3A sub-region is smaller than that of the 2A sub-region, and an in-plane birefringence of the 1B sub-region is the same as that of the 3B sub-region, smaller than that of the 1A sub-region and larger than that of the 3A sub-region.Type: ApplicationFiled: September 29, 2010Publication date: February 3, 2011Applicant: TOPPAN PRINTING CO., LTD.Inventors: Sosuke Akao, Kazuhiro Osato, Hironobu Suda, Yuji Kubo, Godai Fukunaga, Yuki Yasu, Takao Tagichi