Liquid Crystal Optical Element Patents (Class 349/193)
  • Patent number: 8007877
    Abstract: To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal optical modulation element to modulate a laser beam having a wavelength of at most 500 nm, which comprises a layer of a polymer liquid crystal composition sandwiched between a pair of transparent substrates facing each other, characterized in that each of the pair of transparent substrates has an alignment film on the surface which faces the other transparent substrate, and the polymer liquid crystal composition is a polymer liquid crystal containing a hindered amine compound and a hindered phenol compound.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: August 30, 2011
    Assignee: Asahi Glass Company, Limited
    Inventors: Kara Yoshida, Yuriko Kaida, Hiromichi Nagayama, Hiroshi Kumai
  • Patent number: 7997737
    Abstract: A projection display device enhances reliability and reduces speckle noise. A blue laser, a red laser, and a green laser emit blue laser light, red laser light, and green laser light, respectively. A spatial light modulation element modulates the blue laser light emitted from the blue laser, the red laser light emitted from the red laser, and the green laser light emitted from the green laser. A projection lens projects the laser light modulated by the spatial light modulation element onto a screen. First and second light diffusing elements are arranged on an optical axis between the blue laser, the red laser, and the green laser, and the spatial light modulation element to change the degree of diffusion of the blue laser light, the red laser light, and the green laser light temporally and electrically.
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: August 16, 2011
    Assignee: Panasonic Corporation
    Inventors: Tatsuo Itoh, Tetsuro Mizushima, Kazuhisa Yamamoto
  • Publication number: 20110181826
    Abstract: The present invention relates to a radial-shaped liquid crystal compound, and an optical film and a liquid crystal display device comprising the same. Particularly the present invention provides a compound represented by Chemical Formula 1 comprising a radial-shaped core of tetraphenyl ethylene in which four phenyl groups are bonded to an ethylene group, and makes it possible to provide an optical film which can minimize the change of color according to viewing angle and has an improved contrast ratio and high refractive anisotropy, and a liquid crystal display device comprising the same, by using the compound.
    Type: Application
    Filed: July 3, 2009
    Publication date: July 28, 2011
    Applicant: LG Chem, Ltd.
    Inventors: Bum-Gyu Choi, Min-Jin Ko, Myung-Sun Moon, Jae-Ho Cheong, Dae-Ho Kang, Ki-Youl Lee, Yun-Bong Kim
  • Publication number: 20110157539
    Abstract: A security element having a variable optical effect, including at least one quasi-spherical particle having at least one external part and at least one internal part, said external part including at least one cholesteric liquid crystal and said internal part including at least one thermochromic compound and/or at least one photochromic compound undergoing a reversible transition from a colourless state to a dark colour or from a dark colour to a colourless state when said compound is subjected to an activation temperature or to activation radiation respectively, the dark colour making it possible to see the interference effect of said liquid crystal, and the colourless state making this interference effect no longer visible.
    Type: Application
    Filed: July 2, 2009
    Publication date: June 30, 2011
    Applicant: ARJOWIGGINS SECURITY
    Inventor: Henri Rosset
  • Patent number: 7961273
    Abstract: The invention provides a retardation-controlling optical member that includes a retardation layer obtained by aligning and fixing crosslinkable liquid crystal molecules and columnar structures disposed on the retardation layer. When a liquid crystal cell is formed by use of the retardation-controlling optical member, the columnar structures are effectively inhibited from subsiding in the retardation layer to locally make the cell gap smaller even when pressure is externally applied in a thickness direction of the liquid crystal cell. A sum total of lower bottom areas of columnar structures disposed on a retardation layer is made larger sufficiently compared to a total area of, in particular, an effective display region of a retardation layer surface where the columnar structures are disposed, whereby pressure applied from a thickness direction is dispersed.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: June 14, 2011
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Norihisa Moriya, Shinji Hayashi, Yuji Nakatsugawa
  • Publication number: 20110095518
    Abstract: A security element for securing valuable articles comprises an optically variable layer (18) that conveys different color impressions at different viewing angles, and a color-constant layer (17, 24). The optically variable layer (18) and the color-constant layer (17, 24) are stacked in a covering region (20), while at most one of the optically variable layer (18) and the color-constant layer (17, 24) is present outside (22) the covering region. The color impression of the stacked layers (18, 17, 24) in the covering region (20) and the color impression of the one layer (18) outside (22) the covering region are matched with each other when viewed at a predetermined viewing angle. Further, the color-constant layer comprises an ink layer (17) and a metal layer arranged below the ink layer (24).
    Type: Application
    Filed: July 2, 2009
    Publication date: April 28, 2011
    Applicant: GIESECKE & DEVRIENT GMBH
    Inventors: Winfried Hoffmuller, Marius Dichtl, Stefan Bichlmeier, Lars Hoffmann, Manfred Heim
  • Publication number: 20110080554
    Abstract: A light emitting apparatus comprises a lamination of a first and a second light deflecting liquid crystal cells, a voltage applying device applying voltages to the light deflecting liquid crystal cells and an optical system irradiating incident light to the first light deflecting liquid crystal cell. Each cell comprises a prism layer having a prism extending in a predetermined direction, an alignment film formed on the prism layer and a liquid crystal layer having liquid crystal molecules. Long axis directions of the liquid crystal molecules are oriented in the predetermined direction on an interface between the alignment film and liquid crystal layer in the first cell and in a direction orthogonal to the predetermined direction in the second cell. The liquid crystal cells can change a course of light by deflecting both polarized light components of incident light.
    Type: Application
    Filed: October 4, 2010
    Publication date: April 7, 2011
    Applicant: STANLEY ELECTRIC CO., LTD.
    Inventor: Yasuo TOKO
  • Patent number: 7916251
    Abstract: A laminated optical film including a first optical anisotropic layer, and a second optical anisotropic layer, wherein Rth1 of the first optical anisotropic layer, and Rth2 of the second optical anisotropic layer satisfy one of Relationships (1) and (2), and ?Rth1?0 nm and ?Rth2?0 nm ??(1) ?Rth1<0 nm and ?Rth2>0 nm ??(2) wherein a retardation value Rth of the laminated optical film as a whole in its thickness direction satisfies 50 nm?Rth?500 nm, where ?Rth1 denotes a value obtained by calculating the expression Rth1 (at a temperature of 50° C.)?Rth1 (at a temperature of 25° C.) concerning the first optical anisotropic layer, and ?Rth2 denotes a value obtained by calculating the expression Rth2 (at a temperature of 50° C.)?Rth2 (at a temperature of 25° C.) concerning the second optical anisotropic layer.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: March 29, 2011
    Assignee: Fujifilm Corporation
    Inventors: Shun Nakamura, Masayoshi Toyoda
  • Publication number: 20110069241
    Abstract: A liquid crystal compound having a good durability against light, a polymerizable liquid crystal composition and an optically anisotropic material are provided. Further, an optical element having a good durability against light and an optical information writing/reading device employing such an element are provided. The liquid crystal compound is represented by a general formula CH2?CR1—COO-(L)k-E1-E2-(E3)m-R2. E1 is preferably a trans-2,6-decahydronaphthalene group and E2 is preferably a trans-1,4-cyclohexylene group. A phase difference plate 4 produced by employing the compound has a good durability against light, and accordingly, it is possible to achieve an optical head device employing a blue laser as a light source 1 and being suitable for large capacity writing/reading.
    Type: Application
    Filed: December 2, 2010
    Publication date: March 24, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Satoshi Okada, Makoto Hasegawa, Hiroshi Kumai
  • Patent number: 7910020
    Abstract: Liquid crystal compositions comprising compounds including at least one mesogenic substructure and at least one long flexible segment and a compound selected from a photochromic compound, a dichroic compound and a photochromic-dichroic compound and methods of synthesizing the same and their use in articles of manufacture and ophthalmic devices are disclosed.
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: March 22, 2011
    Assignee: Transitions Optical, Inc.
    Inventors: Meng He, Anil Kumar, Jiping Shao, Xiao-Man Dai, Ruisong Xu
  • Patent number: 7894117
    Abstract: A transparent window switchable rear vision mirror adapted to be secured to a motor vehicle for improved road safety, said switchable window/mirror including, a film suitable for use as a light modulating unit of suspended particle device (spd) light valve, said film comprising a matrix polymer material having droplets of a liquid light valve suspension comprising a plurality of particles dispersed in a liquid suspending medium distributed within a matrix, said film characterized in that presence or lack thereof of an electric field results in the particles being aligned such that a beam of light may be reflected, transmitted or absorbed depending on the status of the electrical field applied thereto such a film; a switchable mirror device comprising a substrate and a mono layer film capable of undergoing a reversible change in light transmission or reflectance, said substrate including a film comprising a transmission metal composition; and a power supply device to provide an electrical charge to said film f
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: February 22, 2011
    Inventor: Andrew Finlayson
  • Publication number: 20110025973
    Abstract: A method of producing a patterned birefringent product, comprising at least steps [1] to [3] in this order: [1] producing a birefringent pattern building material comprising at least one optically anisotropic layer, which is formed by a process including: coating and drying a composition containing at least one rod-like liquid crystalline compound having at least two reactive groups and at least one chiral agent to form a cholesteric liquid crystal phase; and then subjecting the cholesteric liquid crystal phase to heating or exposure to radiation to form the optically anisotropic layer containing a polymer fixed by polymerization and fixing; [2] subjecting the birefringent pattern building material to a patterned exposure to light; and, [3] baking a laminate obtained after the step [2] at 50° C. or higher and 400° C. or lower.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 3, 2011
    Inventors: Hideki KANEIWA, Ichiro Amimori
  • Publication number: 20110019131
    Abstract: A process for producing an optical compensation film comprises a liquid crystal layer application step (10) of applying a liquid crystal layer coating solution containing a liquid crystal compound to an alignment layer on a surface of a transparent substrate (4c) that is continuously transported; a liquid crystal layer drying step (11) of drying the liquid crystal layer; a cooling and curing step of curing the liquid crystal layer while cooling the liquid crystal layer to a temperature lower than a drying temperature used in the drying step; and a heating and curing step of curing the alignment layer while heating the alignment layer to a temperature higher than a cooling temperature used in the cooling and curing step. The process enables the durability and damage resistance as well as the optical characteristics of the optical compensation film to be independently controlled.
    Type: Application
    Filed: March 13, 2009
    Publication date: January 27, 2011
    Applicant: FUJIFILM Corporation
    Inventors: Kazuhiro Oki, Hirokazu Nishimura, Akihiro Matsuoka, Kazuhiro Shiojiri, Shun Nakamura
  • Publication number: 20110020600
    Abstract: A cellulose acylate film that has a maximum thickness difference (P?V value) of 1 ?m or less within a range of a diameter of 60 mm with an arbitrary point as center, and that has an in-plane retardation Re(?) satisfying a relationship Re(590))?5 nm and a thickness-direction retardation Rth(?) satisfying a relationship |Rth(590)|?60 nm, wherein Re(?) represents an in-plane retardation (Re) value (unit: nm) at a wavelength of ?nm; and Rth(?)) represents a thickness-direction retardation (Rth) value (unit: nm) at a wavelength of ?nm.
    Type: Application
    Filed: September 29, 2006
    Publication date: January 27, 2011
    Applicant: FUJIFILM Corporation
    Inventors: Katsumi Sasata, Koju Ito
  • Patent number: 7875325
    Abstract: An optical film comprising a transparent film, and, on the film, at least one layer formed by applying a composition comprising a titanium compound and/or a zirconium compound and a vinyl alcohol-based resin to a surface is disclosed.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: January 25, 2011
    Assignee: Fujifilm Corporation
    Inventors: Tokuju Oikawa, Michio Nagai
  • Patent number: 7859751
    Abstract: A compact apparatus for reading from and/or writing to holographic storage media and polarizing filter for use in such an apparatus includes a substrate with an outer zone and an inner zone, the outer zone and the inner zone having different optical properties for a first direction of polarization and a second direction of polarization, and a wave plate attached to the substrate for influencing the polarization of the a light beam, wherein a part of the wave plate corresponding to either the outer zone or the inner zone is switchable.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: December 28, 2010
    Assignee: Thomson Licensing
    Inventor: Joachim Knittel
  • Patent number: 7847915
    Abstract: An optical element including: an alignment substrate; a liquid crystal layer formed on the alignment substrate, made by forming and curing a film of a liquid crystalline material; and a protective layer having high hardness, formed on the liquid crystal layer. The protective layer is for protecting the liquid crystal layer from being deformed by externally exerted forces. Preferably, the protective layer has a modulus of elasticity (=(elastic deformation)/(total deformation)) of 0.6 or more and a plastic deformation of 0.5 ?m or less as determined by pushing an indenter into the protective layer with a test force of 2 mN in accordance with the universal hardness test method.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: December 7, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Keiko Tazaki, Koji Ishizaki
  • Patent number: 7846515
    Abstract: To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal optical modulation element to modulate a laser beam having a wavelength of at most 500 nm, which comprises a layer of a polymer liquid crystal composition sandwiched between a pair of transparent substrates facing each other, characterized in that each of the pair of transparent substrates has an alignment film on the surface which faces the other transparent substrate, and the polymer liquid crystal composition is a polymer liquid crystal containing a hindered amine compound and a hindered phenol compound.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: December 7, 2010
    Assignee: Asahi Glass Company, Limited
    Inventors: Kara Yoshida, Yuriko Kaida, Hiromichi Nagayama, Hiroshi Kumai
  • Publication number: 20100302489
    Abstract: The present invention provides: an ink composition capable of forming a liquid crystal layer even on a base material with no alignment treatment applied, capable of obtaining a high contrast display when viewed from the front side, having a low Haze, capable of satisfying the physical properties required for the optical characteristics of an optical film, having a high production yield, and efficient and stable in terms of the industrial productivity; and an optical film, a polarizing film and a liquid crystal display produced using the ink composition. The liquid crystal layer forming ink composition comprises a liquid crystalline molecular material, an organic solvent for dissolving or dispersing the molecular material, and an alcohols solvent. By applying the ink composition on a base material 2, drying, and aligning the liquid crystal molecule material, an optical film 1 with a liquid crystal layer 3 formed can be obtained.
    Type: Application
    Filed: August 16, 2010
    Publication date: December 2, 2010
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventor: Takashi KURODA
  • Publication number: 20100276488
    Abstract: A security structure including: a first region that is at least partially reflective and of low opacity; a second region that is at least partially reflective and of higher opacity than the first region; and a layer of a coating presenting birefringence properties, covering the first and second regions, at least in part.
    Type: Application
    Filed: December 17, 2008
    Publication date: November 4, 2010
    Applicant: ARJOWIGGINS SECURITY
    Inventor: Michel Camus
  • Patent number: 7820250
    Abstract: To provide a liquid crystal optical modulation element which is excellent in durability against blue laser and which can maintain the characteristics for a long period of time. A liquid crystal optical modulation element to modulate a laser beam having a wavelength of at most 500 nm, which comprises a layer of a polymer liquid crystal composition sandwiched between a pair of transparent substrates facing each other, characterized in that each of the pair of transparent substrates has an alignment film on the surface which faces the other transparent substrate, and the polymer liquid crystal composition is a polymer liquid crystal containing a hindered amine compound and a hindered phenol compound.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: October 26, 2010
    Assignee: Asahi Glass Company, Limited
    Inventors: Kara Yoshida, Yuriko Kaida, Hiromichi Nagayama, Hiroshi Kumai
  • Patent number: 7812902
    Abstract: There is provided a liquid crystal panel and a liquid crystal display apparatus in which light leakage occurring from a peripheral portion of a screen is small, and which has excellent display uniformity in a high humidity environment. A liquid crystal panel according to an embodiment of the present invention includes: a liquid crystal cell; a first polarizing plate placed on a viewer side of the liquid crystal cell; and a second polarizing plate placed on an opposite side of the viewer side of the liquid crystal cell, wherein a dimensional change ratio (C1) of the first polarizing plate is larger than a dimensional change ratio (C2) of the second polarizing plate.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: October 12, 2010
    Assignee: Nitto Denko Corporation
    Inventors: Yoshiyuki Kiya, Shuuji Yano, Kenji Yoda, Kentarou Kobayashi, Masatoshi Tomonaga, Shouhei Maezawa, Yusuke Toyama
  • Publication number: 20100231846
    Abstract: The present invention relates to improvements in security devices that can be used in varying shapes and sizes for various authenticating or security applications, particularly an optically variable security device utilising liquid crystal materials. The security device comprises a liquid crystal layer (11), an at least partially absorbing layer (12) adjacent at least a part of one side of the liquid crystal layer (11), and at least one customising region (13) which is adjacent at least a part of an opposite side of the liquid crystal layer (11) to the absorbing layer (12) in selected regions. The at least one customising region (13) modifies the colour shifting properties of the liquid crystal layer (11) such that at least two contrasting optically variable regions are provided by the regions covered by the at least one customising region and regions not covered by the at least one customising region.
    Type: Application
    Filed: May 25, 2007
    Publication date: September 16, 2010
    Inventors: Lawrence Commander, Adam Jeacock, Carole Lesley Foster
  • Patent number: 7791813
    Abstract: A projection-type imaging array comprising a plurality of microfluidic devices (1, 1?) are provided, each microfluidic device having a reservoir (30) containing first and second fluids (10 and 20) that are immiscible with respect to teach other. A drive unit (40) is provided for each microfluidic device to selectively displace the surface formed at the interface between the first and second fluids. Accordingly, when a particular microfluidic device is turned OFF according to the drive unit, the interface surface is positioned to redirect incoming light (via reflection/refraction) away from a display surface (80). Conversely, when the microfluidic device is turned ON, the interface surface is positioned so that the incoming light is directed toward the display surface.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: September 7, 2010
    Assignee: Honeywell International Inc.
    Inventors: Andrei Cernasov, Robert J. Saccomanno
  • Publication number: 20100220280
    Abstract: An apparatus includes a layer including a material which has an electrically controllable transparency. At least a part of the layer is arranged to cover at least a part of a surface of a display. The apparatus further includes electrical contacts arranged to enable an electrical control of the transparency of the layer. When employing such an apparatus, it may be determined which appearance the layer is to assume. The transparency of the layer can then be controlled in accordance with the determined appearance.
    Type: Application
    Filed: September 27, 2007
    Publication date: September 2, 2010
    Inventor: Ilkka Antero Hyytiainen
  • Publication number: 20100201920
    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: Application
    Filed: August 6, 2008
    Publication date: August 12, 2010
    Applicant: Merck Patent Gesellschaft
    Inventors: Kevin Adlem, Owain Llyr Parri, Karl Skjonnemand, David Wilkes
  • Patent number: 7758969
    Abstract: An optical element includes a supporting material, and a phase difference controlling functional layer provided on the supporting material and including a polymerized liquid crystal material cured to have a predetermined liquid crystal regularity. The phase difference controlling functional layer is formed by curing a photosensitive composition. The photosensitive composition includes at least a polymerizable liquid crystal material, a photopolymerization initiator, a crosslinking agent, an acid generator, and a solvent. The crosslinking agent is an alcohol having at least two alkylol groups thereon and undergoing electrophilic substitution onto an aromatic ring, or an alkoxy compound having at least two alkoxy groups thereon and undergoing electrophilic substitution onto an aromatic ring.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: July 20, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Shinji Hayashi
  • Publication number: 20100165256
    Abstract: The invention provides a retardation-controlling optical member that includes a retardation layer obtained by aligning and fixing crosslinkable liquid crystal molecules and columnar structures disposed on the retardation layer. When a liquid crystal cell is formed by use of the retardation-controlling optical member, the columnar structures are effectively inhibited from subsiding in the retardation layer to locally make the cell gap smaller even when pressure is externally applied in a thickness direction of the liquid crystal cell. A sum total of lower bottom areas of columnar structures disposed on a retardation layer is made larger sufficiently compared to a total area of, in particular, an effective display region of a retardation layer surface where the columnar structures are disposed, whereby pressure applied from a thickness direction is dispersed.
    Type: Application
    Filed: January 25, 2008
    Publication date: July 1, 2010
    Applicant: DAI NIPPON PRINTING CO.LTD.
    Inventors: Norihisa Moriya, Shinji Hayashi, Yuji Nakatsugawa
  • Publication number: 20100165258
    Abstract: 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: Application
    Filed: December 23, 2009
    Publication date: July 1, 2010
    Applicant: DAI NIPPON PRINTING CO., LTD.
    Inventors: Satoru HAMADA, Keiji KASHIMA, Takashi KURODA, Hirofumi YUMOTO
  • Publication number: 20100165284
    Abstract: The present invention provides a method of producing an optical laminate that can produce an optical laminate including an applied film containing a lyotropic liquid crystalline compound so that the thickness of the applied film will be approximately uniform. A method of producing an optical laminate having a base material and an applied film, comprising the step of applying a solution containing at least one kind of lyotropic liquid crystalline compound on the base material so as to form the applied film, wherein the concentration of the lyotropic liquid crystalline compound in the solution is lower than the isotropic phase-liquid crystal phase transition concentration. For example, the concentration of the lyotropic liquid crystalline compound in the solution is from (CIN?18)% by mass to (CIN?1)% by mass, where CIN represents the isotropic phase-liquid crystal phase transition concentration.
    Type: Application
    Filed: February 4, 2008
    Publication date: July 1, 2010
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yasuko Iwakawa, Shusaku Nakano, Shoichi Matsuda
  • Publication number: 20100157204
    Abstract: An optically anisotropic film comprising at least one species of liquid crystal compound which exhibits a nematic phase or a smectic phase, the liquid crystal phase showing birefringence ?n(?) at wavelength ? which satisfies the numerical expression (1) below is disclosed.
    Type: Application
    Filed: April 11, 2008
    Publication date: June 24, 2010
    Applicant: FUJIFILM Corporation
    Inventors: Mitsuyoshi Ichihashi, Shinichi Morishima, Hiroshi Takeuchi
  • Publication number: 20100149459
    Abstract: A view angle control element capable of limiting a view angle without degrading image quality (front quality) when seen from a front side and a display device provided with the view angle control element are provided. A liquid crystal display device (1) includes a liquid crystal panel (10), and a view angle control film (20) that controls a view angle of the liquid crystal panel (10). The view angle control film (20) is a laminated film including at least a liquid crystal film (21) and a linearly polarizing plate (22). In the liquid crystal film (21), liquid crystal molecules are solidified while being aligned with major axes tilted in a predetermined azimuth angle direction from a normal direction of a film surface.
    Type: Application
    Filed: July 7, 2008
    Publication date: June 17, 2010
    Inventors: Koji Yabuta, Tomoo Takatani, Hiroshi Fukushima
  • Publication number: 20100118232
    Abstract: Disclosed is a polymerizable liquid crystal composition which is applicable on a supporting substrate, such as a transparent plastic film for optical use, or glass, etc., and has a homeotropic alignment. Also, disclosed is an optical film obtained by aligning and fixing the polymerizable composition on a substrate.
    Type: Application
    Filed: May 22, 2008
    Publication date: May 13, 2010
    Inventors: Jaeho Cheong, Minjin Ko, Myungsun Moon, Daeho Kang, Bumgyu Choi, Kiyoul Lee, YunBong Kim
  • Publication number: 20100110675
    Abstract: A light output device comprises a first and a second substrate arrangement (1,2), the first substrate arrangement (1) comprising a light output surface of the device. An electrode arrangement (3a,3b) is sandwiched between the substrate arrangements and at least one light source (4) is connected to the electrode arrangement. The first substrate (1) arrangement comprises a light diffuser for changing the level of uniformity of the light output from the light source and the second substrate (2) arrangement comprises a light scattering or reflecting layer. This arrangement uses a scattering substrate arrangement for the substrate from which illumination is provided. In order to enhance the level of uniformity, the opposite substrate arrangement is also either scattering or reflecting.
    Type: Application
    Filed: March 31, 2008
    Publication date: May 6, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Maarten Marinus Johannes Wilhelmus Van Herpen, Alexander Henricus Waltherus Van Eeuwijk, Eduard Matheus Johannes Niessen
  • Publication number: 20100110363
    Abstract: 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: Application
    Filed: January 7, 2010
    Publication date: May 6, 2010
    Inventors: MICHAEL J. ESCUTI, Carlos Sanchez, Cornelis W.M. Bastiaansen, Dirk J. Broer
  • Patent number: 7687118
    Abstract: A diamine compound is proposed as well as polymers, copolymers, polyamic acids, polyamic acid esters, or polyimides based on such compound. The compound is represented by one of the general formulae (Ia) and (Ib). It could be shown that such structures, in particular for a specific choice of the residue B, provide, if e.g. used as orientation layers, a photostable, vertically aligning material with an improved VHR.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: March 30, 2010
    Assignee: Rolic AG
    Inventors: Zoubair Mohammed Cherkaoui, Thomas Bachels, Guy Marck, Olivier Müller, Andreas Schuster, Hubert Seiberle
  • Publication number: 20100073604
    Abstract: A retardation film which is manufacturable by a simple process, and being capable of preventing a decline in light use efficiency is provided. A retardation film includes: a substrate having a plurality of grooves extending in a specific direction on a surface thereof; and a retardation layer arranged in contact with the surface of the substrate, and including a liquid crystal material, the liquid crystal material being aligned along the extending direction of the plurality of grooves and being polymerized.
    Type: Application
    Filed: September 22, 2009
    Publication date: March 25, 2010
    Applicant: SONY CORPORATION
    Inventors: Kentaro Okuyama, Hitoshi Katakura, Kei Obata, Jun Shimizu, Shinya Suzuki, Mitsunari Hoshi, Junichi Inoue, Akito Kuriyama
  • Publication number: 20100060845
    Abstract: 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 supported by the substrate. The solidified liquid crystal layer includes first to third regions. The first to third regions re arranged on the substrate and different in degree of orientation of mesogens.
    Type: Application
    Filed: November 16, 2009
    Publication date: March 11, 2010
    Applicant: TOPPAN PRINTING CO., LTD.
    Inventors: Sosuke AKAO, Yuji Kubo, Masashi Aimatsu, Takao Taguchi
  • Publication number: 20100052528
    Abstract: An organic light emitting diode (OLED) display, a display device including the same, and associated methods, the OLED display including a substrate member, an organic light emitting element on the substrate member, and a liquid crystal polymer layer on the organic light emitting element, wherein the liquid crystal polymer layer is configured to delay a phase of light passing therethrough.
    Type: Application
    Filed: August 21, 2009
    Publication date: March 4, 2010
    Inventors: Soon-Ryong Park, Hee-Seong Jeong, Woo-Suk Jung, Hee-Chul Jeon, Eun-Ah Kim, Noh-Min Kwak, Chul-Woo Jeong, Joo-Hwa Lee
  • Publication number: 20100045901
    Abstract: A compound of formula (1): wherein A1 and A2 are —O—, —NR—, —S—, or —CO—, in which R is a hydrogen atom or substituent; Z is one or two atoms selected from a carbon atom or a non-metal atom of Group 14, 15 or 16 in the Periodic Table, and forms a five- or six-membered ring with the C—C?C—C or C?C—C?C; R1, R2, and R3 each are a substituent; m is an integer of 0 to 4; L1 and L2 are a single bond or divalent linking group; X is a non-metal atom of Group 14, 15 or 16 in the Periodic Table, and may have a hydrogen atom or R4; and at least one of R, R1, R2, R3, and R4 is substituted with a polymerizable group; a liquid crystal composition, an optical film, a retardation sheet, a polarizing plate, and a liquid crystal display.
    Type: Application
    Filed: December 14, 2007
    Publication date: February 25, 2010
    Applicant: FUJIFILM Corporation
    Inventors: Shigeki Uehira, Michitaka Matsuumi, Shinichi Morishima, Mitsuyoshi Ichihashi, Kotaro Yasuda, Hiroshi Takeuchi
  • Publication number: 20100026610
    Abstract: An optical film capable of improving luminance of a display unit, in which a viewing angle in the horizontal direction of emitted light of the display unit is wider than a viewing angle in the vertical direction and the emitted light of the display unit has a polarization component in the vertical direction viewable by polarized sunglasses, an illumination system including the same, and a display unit including the same are provided. The optical film includes a plurality of three-dimensional structures extending in one direction and arranged sequentially in a direction crossing the one direction. The three-dimensional structures contain a liquid crystalline polymer having orientation, and have refractive index anisotropy in which refractive index in the extending direction of the three-dimensional structures is smaller than refractive index in the direction crossing the extending direction of the three-dimensional structures.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 4, 2010
    Applicant: SONY CORPORATION
    Inventors: Kei Obata, Mitsunari Hoshi, Jun Shimizu
  • Patent number: 7649598
    Abstract: The present invention intends to provide an optical element that can be incorporated in a liquid crystal display device, is provided with a birefringent layer obtained by aligning and polymerizing polymerizable liquid crystal molecules, and, while sufficiently reflecting an actual condition of a liquid crystal display device, can reduce fear that a thickness of a driving liquid crystal layer unexpectedly varies. An optical element includes a light-transmitting base material and a birefringent layer comprising of aligned and polymerized liquid crystal molecules and having a value of indentation depth of 6% or less relative to a thickness of the birefringent layer, wherein said value is measured under conditions where a cylindrical indenter having a diameter of 30 (?m) is applied at a load of 10 mN/sec up to the maximum load of 400 mN.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: January 19, 2010
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventor: Yuji Nakatsugawa
  • Patent number: 7648647
    Abstract: The invention is generally related to a polymer/liquid crystal composite, which includes a liquid crystal material which exhibits an optically isotropic liquid crystal phase in the temperature range of approximately 5° C. or more in the elevated temperature process but does not exhibit a nematic phase; and a polymer, and which is used for an element driven in a state of the optically isotropic liquid crystal phase.
    Type: Grant
    Filed: May 7, 2008
    Date of Patent: January 19, 2010
    Assignees: Kyushu University, National University Corporation, Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Hirotsugu Kikuchi, Yasuhiro Haseba
  • Patent number: 7649610
    Abstract: A method and a device for reducing speckle formation on a projection display when working with a coherent light source. In this context, the light coming from the light source, before the projection, may strike an electrically controllable optical element having a spatially inhomogeneous refractive index, passing through the same, the refractive index being varied over time within the projection period. This may lead to an averaging out of the speckle pattern on the projection screen. For purposes of illumination, a multimode light source may be used, and/or the light coming from the light source is separated into a plurality of spatial modes, thereby reinforcing the effect. As an optical element, one may employ a liquid crystal element composed of at least two liquid crystal layers, to which a spatially dependent voltage is applied to generate a spatially dependent refractive index. Its birefringence may be compensated by orientating the layers to one another in appropriate fashion.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: January 19, 2010
    Assignee: Deutsche Telekom AG
    Inventors: Wolfgang Dultz, Gisela Dultz, Leonid Beresnev, Heidrun Schmitzer
  • Publication number: 20090322970
    Abstract: An optical low-pass filter is constituted with a liquid crystal substrate including a layer of liquid crystal. The optical low-pass filter includes: a first liquid crystal part in which the liquid crystal is aligned along a first direction; and a second liquid crystal part in which the liquid crystal is aligned along a second direction different from the first direction. The first liquid crystal part and the second liquid crystal part are disposed in an alternately repeated fashion.
    Type: Application
    Filed: July 4, 2007
    Publication date: December 31, 2009
    Applicant: NIKON CORPORATION
    Inventor: Toru Iwane
  • Publication number: 20090323012
    Abstract: Liquid crystal compositions comprising compounds including at least one mesogenic substructure and at least one long flexible segment and a compound selected from a photochromic compound, a dichroic compound and a photochromic-dichroic compound and methods of synthesizing the same and their use in articles of manufacture and ophthalmic devices are disclosed.
    Type: Application
    Filed: June 23, 2009
    Publication date: December 31, 2009
    Applicant: TRANSITIONS OPITCAL, INC.
    Inventors: Meng He, Anil Kumar, Jiping Shao, Xiao-Man Dai, Ruisong Xu
  • Publication number: 20090310087
    Abstract: An object of the invention is to miniaturize a projection display device, enhance reliability of the device, and reduce speckle noise. A blue laser (1), a red laser (2), and a green laser (3) emit blue laser light, red laser light, and green laser light, respectively. A spatial light modulation element (14) modulates the blue laser light emitted from the blue laser (1), the red laser light emitted from the red laser (2), and the green laser light emitted from the green laser (3). A projection lens (15) projects the laser light modulated by the spatial light modulation element (14) onto a screen. First and second light diffusing elements (8 and 9) are arranged on an optical axis between the blue laser (1), the red laser (2), and the green laser (3); and the spatial light modulation element (14) to change the degree of diffusion of the blue laser light, the red laser light, and the green laser light temporally and electrically.
    Type: Application
    Filed: April 5, 2007
    Publication date: December 17, 2009
    Inventors: Tatsuo Itoh, Tetsuro Mizushima, Kazuhisa Yamamoto
  • Patent number: 7632552
    Abstract: A multilayer polarizing structure is produced on a temporary support. The structure comprises at least one orienting layer and one polarizing layer comprising dichroic dyes, the dichroic dyes having an angular orientation determined by the orienting layer. The multilayer structure is separated from the temporary substrate before being applied onto a surface of an optical element. Applying the structure onto the optical element may be easily carried out while obtaining a quality compatible with many uses of the optical element, in particular ophthalmic uses.
    Type: Grant
    Filed: February 22, 2007
    Date of Patent: December 15, 2009
    Assignee: Essilor International (compagnie Generale d'optique)
    Inventors: Cédric Begon, Christelle Defranco, Noémie Lesartre, Dominique Rychel
  • Patent number: 7623217
    Abstract: A tool for use in affixing an optical component, such as glass, to a liquid crystal display (LCD) using a silicone gel mixture includes, in one embodiment, a unitary metallic platen that is shaped to define a central window. A narrow shelf is defined around the central window to support the optical component during the application of the silicone gel thereon. A upwardly extending partition is formed onto the top surface of the platen around the shelf to retain the optical component fixed in place on the platen during the assembly process. A plurality of identical, spaced apart, upwardly extending standoffs are formed onto the free end of the partition to support the LCD a fixed distance away from the optical component. In this manner, the standoffs ensure that the layer of silicone gel deposited between the optical component and the LCD is uniform in thickness to optimize performance.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: November 24, 2009
    Assignee: Via Optronics, LLC
    Inventors: William A. Barrow, Maria E. Crouser, Wayne Patrick Gentry, Andrew Mitchell Robinson
  • Patent number: 7619286
    Abstract: A poly-silicon liquid crystal display device with an improved aperture ratio and a simplified method of fabricating the same are disclosed. A liquid crystal display device according to the present invention includes first and second substrates; a gate line on the first substrate; a data line crossing the gate line to define a pixel region; a thin film transistor (TFT) near the crossing of the gate and data lines, the TFT having a gate electrode, a source electrode and a drain electrode; a pixel electrode in the pixel region, the pixel electrode having a double-layer structure in which a metal layer is formed on a transparent conductive layer; a black matrix on the second substrate, the black matrix having an aperture portion partially overlapping the pixel electrode and the drain electrode; and a liquid crystal layer between the first and second substrates.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: November 17, 2009
    Assignee: LG Display Co., Ltd.
    Inventor: Yong In Park