Nonchiral Additive In The Liquid Crystal Material Patents (Class 349/163)
  • Patent number: 9477086
    Abstract: A display device includes a first polarizer for transmitting first light that is parallel to a first axis and pertains to a two-dimensional image. The display device further includes a first electrode layer, a second electrode layer, and a liquid crystal layer disposed between the first electrode and the second electrode. The liquid crystal layer includes a chiral dopant and a liquid crystal material and is configured to form a lens associated with a predetermined phase distribution. The lens is configured for refracting the first light to transmit second light. The display device further includes a second polarizer for polarizing the second light to transmit third light that is parallel to a second axis. The second axis is oriented at an angle with respect to the first axis in a plan view of the display device. The angle has a predetermined angle size greater than zero degree.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: October 25, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Suk Choi, Sung Hwan Hong, Su Jin Kim, Heung Shik Park, Ji Hong Bae, Hyeok Jin Lee
  • Patent number: 9322956
    Abstract: The invention relates to photo-alignment layers for planar alignment of liquid crystals. Photo-alignment layers according to the invention exhibit a characteristic wavelength dependency of the dichroism in the uv wavelength range. The invention further relates to methods for providing such photo-alignment layers as well as liquid crystal devices containing them.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: April 26, 2016
    Assignee: ROLIC AG
    Inventors: Mohammed Ibn-Elhaj, Eva Veenstra, Manuel Koechlin
  • Publication number: 20150085241
    Abstract: The present invention provides a liquid crystal horizontal orientation agent, a horizontal orientation type liquid crystal composition, a horizontal orientation type LCD device and a method of fabricating the horizontal orientation type LCD device. In one embodiment, the liquid crystal molecule is horizontally oriented by the liquid crystal horizontal orientation agent without the rubbed orientation layer.
    Type: Application
    Filed: September 22, 2014
    Publication date: March 26, 2015
    Applicants: YAMAGATA UNIVERSITY, LG DISPLAY CO., LTD.
    Inventors: Momoi YUICHI, Mu-Sun KWAK, Koda TOMONORI, Yonetake KOICHIRO, Haba OSAMU
  • Patent number: 8866997
    Abstract: Linear photo-oriented polymer (LPP) layers are situated to align liquid crystals in a liquid crystal polymer (LCP) layer situated at or on the LPP layers. The LCP layer can include a guest such as a fluorophore that aligns with the liquid crystal so as to emit polarized fluorescence in response to an excitation beam. Layer LPP/LCP structures can be provided as light emitters, patterned polarizers, patterned retarders and other devices based on selection of one or more guest materials included in the LCP and alignable with the liquid crystal.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: October 21, 2014
    Assignee: Arizona Board of Regents on behalf of the University of Arizona
    Inventors: Stanley Pau, Arshad S. Sayyad, Graham B. Myhre
  • Patent number: 8724073
    Abstract: A method for manufacturing a liquid crystal display (LCD) device includes preparing first and second substrates, at least one of the first and second substrates being a transparent substrate; forming a plurality of the column spacers on the first substrate for maintaining a cell gap between the first and second substrates and a sidewall on the first substrate for sealing the periphery of the substrates; applying an adhesive solution including an adhesive diluted with an organic solvent onto the first substrate having the column spacers and the sidewall thereon; positioning the second substrate on the first substrate so that the first and second substrates face each other; adhering the column spacers to the second substrate by drying the organic solvent from the adhesive solution; and providing a liquid crystal material between the first and second substrates.
    Type: Grant
    Filed: July 15, 2013
    Date of Patent: May 13, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Joung Won Woo, Yuichi Momoi, Dong Cheon Shin
  • Patent number: 8711322
    Abstract: Electrowetting display devices are presented. The electrowetting display includes a first substrate and an opposing second substrate with a transparent polar fluid layer and an opaque non-polar fluid layer insoluble with each other and interposed between the first and second substrates. A first transparent electrode is disposed on the first substrate. A second transparent electrode is disposed on the second substrate. A dielectric layer is disposed on the second transparent electrode. A reflective plate structure is interposed between the second transparent electrode and the second substrate, thereby defining a reflective region and a transmission region. A backlight plate is disposed on the back of the second substrate. During operation, the opaque non-polar fluid converges, therefore, exposing equal areas of reflective region and transmission region.
    Type: Grant
    Filed: August 18, 2008
    Date of Patent: April 29, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Wei-Yuan Cheng, Chih-Chun Hsiao, Jen-Chieh Yang, Kuo-Lung Lo
  • Patent number: 8692969
    Abstract: The color filter may include a pixel unit having a plurality of sub-pixels of different colors, wherein the plurality of sub-pixels respectively include flat plate metal layers and a plurality of color PDLC layers on the flat plate metal layers, and the plurality of color PDLC layers each include a polymer, a plurality of liquid crystal drops dispersed in the polymer, and a plurality of color display materials mixed in the liquid crystal drops.
    Type: Grant
    Filed: October 13, 2010
    Date of Patent: April 8, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-eun Jang, Gae-hwang Lee, Kyu-young Hwang, Jae-eun Jung
  • Patent number: 8675167
    Abstract: A polymer dispersed display apparatus includes a polymer layer, and a plurality of liquid crystal drops dispersed in the polymer layer. Quantum dots emitting a plurality of colors of light are mixed in the liquid crystal drops. Therefore, the polymer dispersed display apparatus displays colors without the need for a color filter. Thus, the polymer dispersed display apparatus need not include a polarization plate and a color filter, so that a light usage efficiency of the polymer dispersed display apparatus increases.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: March 18, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-eun Jang, Seung-nam Cha, Jae-eun Jung, Yong-wan Jin
  • Publication number: 20130229607
    Abstract: A liquid crystal display includes a first substrate and a second substrate facing each other, a plurality of first electrodes on the first substrate, a first vertical alignment layer on the first electrodes, a second electrode on the second substrate, a second vertical alignment layer on the second electrode, and a liquid crystal layer between the first substrate and the second substrate, wherein the liquid crystal layer includes liquid crystal molecules having negative dielectric anisotropy, a chiral dopant, and an alignment aiding agent.
    Type: Application
    Filed: June 22, 2012
    Publication date: September 5, 2013
    Inventors: Dong Gi SEONG, Hee Hwan LEE, Min-Jae KIM, Min-Hee KIM, Keun Chan OH
  • Patent number: 8514355
    Abstract: A method for manufacturing a liquid crystal display (LCD) device includes preparing first and second substrates, at least one of the first and second substrates being a transparent substrate; forming a plurality of the column spacers on the first substrate for maintaining a cell gap between the first and second substrates and a sidewall on the first substrate for sealing the periphery of the substrates; applying an adhesive solution including an adhesive diluted with an organic solvent onto the first substrate having the column spacers and the sidewall thereon; positioning the second substrate on the first substrate so that the first and second substrates face each other; adhering the column spacers to the second substrate by drying the organic solvent from the adhesive solution; and providing a liquid crystal material between the first and second substrates.
    Type: Grant
    Filed: June 2, 2006
    Date of Patent: August 20, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Joung Won Woo, Yuichi Momoi, Dong Cheon Shin
  • Patent number: 8462310
    Abstract: A nematic bistable liquid crystal (LC) display element includes a substrate having an inner surface alignment layer and a pair of in-plane electrodes in proximity to the substrates. The display element has charged electrophoretic nanoparticles in the LC medium configured to setup a matrix with the LC when an electric field is applied to the electrodes.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: June 11, 2013
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Laura Lynn Kramer, David Sikharulidze
  • Patent number: 8323755
    Abstract: Nematic liquid crystal cells with positive dielectric anisotropy that include colloidal suspensions having nanoclusters (e.g., CdTe nanoclusters, CdSe nanoclusters) that include a pure monolayer of ligands are provided as well as methods of inducing Freedericksz transitions in the nematic liquid crystal cells and methods of controlling the alignment of a liquid crystal.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: December 4, 2012
    Assignee: University of Manitoba
    Inventors: Torsten Hegmann, Brandy Melissa Kinkead
  • Patent number: 8294849
    Abstract: A liquid crystal display device comprises: a liquid crystal display element comprising a pair of glass substrates facing to each other, transparent electrode patterns, each transparent electrode pattern being formed on a facing surface of each one of said pair of glass substrates film structures, each film structure including an oriented film and being formed on each one of said pair of glass substrates with covering said transparent electrode, and a liquid crystal layer held between the pair of glass substrates; and a light source that can radiate near infrared rays to said liquid crystal display element, and wherein at least one of said liquid crystal layer and said film structures include near infrared ray absorption material. A response time of the liquid crystal display device can be improved at a low temperature.
    Type: Grant
    Filed: June 2, 2008
    Date of Patent: October 23, 2012
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Yasuo Toko
  • Patent number: 8294838
    Abstract: Nematic liquid crystal cells with positive dielectric anisotropy that include colloidal suspensions having nanoclusters are provided as well as methods of inducing Freedericksz transitions therein and methods of controlling the alignment of a liquid crystal.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: October 23, 2012
    Assignee: University of Manitoba
    Inventors: Torsten Hegmann, Hao Qi
  • Patent number: 8174630
    Abstract: A reflective liquid crystal display panel capable of performing data programming and/or data erasing via a polarized light is provided. The reflective liquid crystal display panel includes a first substrate, a second substrate, a liquid crystal layer, a transflective film, a retarder and a polarizer. The second substrate is disposed over the first substrate. The liquid crystal layer is located between the first substrate and the second substrate and an optical aligned material is doped in the liquid crystal layer. The transflective film is disposed below the first substrate, and the transflective film allows the polarized light to pass through, so that the orientation of the optical aligned material doped liquid crystal layer can be controlled by the polarized light. The transflective film reflects external light source. The retarder is disposed between the transflective film and the first substrate. The polarizer is disposed on the second substrate.
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: May 8, 2012
    Assignee: Industrial Technology Research Institute
    Inventors: Wei-Ting Hsu, Tsung-Hsien Lin, Hsing-Lung Wang, Chi-Chang Liao
  • Publication number: 20120099065
    Abstract: A liquid crystal display (LCD) includes: a first substrate; a second substrate facing the first substrate; a first electrode and a second electrode formed on the first substrate; and a liquid crystal layer interposed between the first substrate and the second substrate, wherein a first alignment polymer configured to provide an alignment force to the liquid crystal is at a portion of the liquid crystal layer near the first substrate.
    Type: Application
    Filed: March 23, 2011
    Publication date: April 26, 2012
    Inventor: Yong-Kyu Jang
  • Patent number: 8081272
    Abstract: In a preparation method, a chiral or cholesteric liquid crystal, a photoreactive monomer, and a photoinitiator are disposed in a liquid crystal cell. A principal surface of the liquid crystal cell is illuminated with ultraviolet light selected to have a non-uniform ultraviolet light intensity profile in the liquid crystal cell. The illuminating cooperates with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a density corresponding to the non-uniform ultraviolet light intensity profile. The polymer network biases the liquid crystal toward a selected helical alignment direction. In some embodiments, the illuminating includes illuminating with first and second ultraviolet light intensity profiles to produce surface and volume polymer network components.
    Type: Grant
    Filed: February 25, 2009
    Date of Patent: December 20, 2011
    Assignees: Kent State University
    Inventors: Lachezar Komitov, Liang-Chy Chien, Sang Hwa Kim
  • Patent number: 7964252
    Abstract: A liquid crystal device includes a pair of substrates and a liquid crystal layer which is interposed between the pair of substrates and which contains at least one kind of additive selected from a ultraviolet ray absorbent and a radical scavenger, in which a gap between the pair of substrates is set according to amount of the additive.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: June 21, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Kosuke Chidate
  • Patent number: 7903228
    Abstract: A liquid crystal device comprises ferroelectric particles suspended in a liquid crystal material. A method for fabricating a light-modulating device is also disclosed. The method comprises the steps of providing a pair of substrates with a cell gap therebetween, wherein electrodes are disposed on the facing surfaces of the substrates, and permanently disposing a suspension of ferroelectric particles in a liquid crystal material into said cell gap. A method of generating an image comprises providing a pair of substrates with a cell gap therebetween, providing transparent electrodes on each of said substrates adjacent to the cell gap, permanently disposing a suspension of ferroelectric particles in a liquid crystal material within the cell gap, and applying an electric field across the electrodes.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: March 8, 2011
    Assignee: Kent State University
    Inventors: Yurii Reznikov, Anatoliy Glushchenko, Victor Reshetnyak, John West
  • Patent number: 7859637
    Abstract: A system and method of use of a storage capacitor to improve the appearance and addressing characteristics of an electronically driven display. The capacitor is formed by the overlap of portions of electrodes used to address different pixels, or by the overlap of an addressing line and a conductor. An insulator layer situated between the capacitor electrodes can be the same insulator layer present in an FET transistor used to address the pixel. Methods of use of capacitors to achieve improved display addressing are disclosed.
    Type: Grant
    Filed: December 19, 2006
    Date of Patent: December 28, 2010
    Assignee: E Ink Corporation
    Inventors: Karl R. Amundson, Paul S. Drzaic, Peter T. Kazlas
  • Publication number: 20100245695
    Abstract: A liquid crystal display element includes a first substrate having a first electrode on one surface thereof, a transparent second substrate having a transparent second electrode on one surface thereof, a first liquid crystal layer containing a liquid crystal composition, a color filter, and a second liquid crystal layer containing a liquid crystal composition, and at least one of the first and second liquid crystal layers includes an additive having dielectric properties, and the dielectric constant of the first liquid crystal layer is different from that of the second liquid crystal layer.
    Type: Application
    Filed: September 4, 2009
    Publication date: September 30, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Takeo KAKINUMA, Tadayoshi OZAKI, Chikara MANABE, Naoki HIJI
  • Publication number: 20100195036
    Abstract: A liquid crystal display (LCD) comprises a first substrate comprising a pixel electrode comprising one or more first domain-forming features and further comprising a first vertical alignment film disposed on the pixel electrode; a second substrate facing the first substrate and comprising a common electrode which comprises one or more second domain-forming features and further comprises a second vertical alignment film disposed on the common electrode; and a liquid crystal compound interposed between the first and second substrates, wherein the liquid crystal compound comprises liquid crystal molecules, ultraviolet (UV) hardening monomers and UV hardening initiators, and the liquid crystal molecules are pre-tilted to form an angle greater than 88 degrees but less than 90 degrees with respect to the first substrate when no driving power is applied to the pixel and common electrodes. Fast response time is provided in some embodiments.
    Type: Application
    Filed: April 9, 2010
    Publication date: August 5, 2010
    Inventors: Ji-won SOHN, Jong-ho Son, Seung-beom Park, Seon-ah Cho, Jun-hee Na
  • Publication number: 20100195008
    Abstract: Nematic liquid crystal cells with positive dielectric anisotropy that include colloidal suspensions having nanoclusters are provided as well as methods of inducing Freedericksz transitions therein and methods of controlling the alignment of a liquid crystal.
    Type: Application
    Filed: May 2, 2008
    Publication date: August 5, 2010
    Applicant: UNIVERSITY OF MANITOBA
    Inventors: Torsten Hegmann, Hao Qi
  • Publication number: 20100141881
    Abstract: A security document or device is provided which incorporates one or more optical components. Each component includes at least one orientating layer, preferably a photo-orientated polymer network (PPN), and at least one liquid crystal polymer (LCP) layer, and either or both of the orientating layers and LCP layers include a cross-linker to improve the robustness of the document or device without detracting from the desired optical properties. Such a document or device can be authenticated using an external polariser, or using a polariser integral to the document or device itself.
    Type: Application
    Filed: May 25, 2007
    Publication date: June 10, 2010
    Inventors: Odisea Batistatos, Gary Fairless Power
  • Publication number: 20100091208
    Abstract: A nematic bistable liquid crystal (LC) display element includes a substrate having an inner surface alignment layer and a pair of in-plane electrodes in proximity to the substrates. The display element has charged electrophoretic nanoparticles in the LC medium configured to setup a matrix with the LC when an electric field is applied to the electrodes.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 15, 2010
    Inventors: Laura Lynn Kramer, David Sikharulidze
  • Publication number: 20090213317
    Abstract: A method for manufacturing a liquid crystal display panel is provided. The method includes: providing a first substrate and a second substrate; providing a plurality of liquid crystal drops on the first substrate, wherein two adjacent liquid crystal drops in X direction is kept by a distance d1 mm, and two adjacent liquid crystal drops in Y direction is kept by a distance d2 mm, each liquid crystal drop is G mg, d1?16.7, d2?15.4, and G?1; and connecting the first substrate and the second substrate so that the liquid crystal drops are sealed between the first substrate and the second substrate.
    Type: Application
    Filed: April 2, 2008
    Publication date: August 27, 2009
    Applicant: AU OPTRONICS CORP.
    Inventors: Jia-Hau Jian, Chih-Ho Chiu, Cheng-Jung Chiang, Chung-Ching Hsieh, Te-Sheng Chen, Norio Sugiura
  • Patent number: 7499125
    Abstract: In a preparation method, a chiral or cholesteric liquid crystal, a photoreactive monomer, and a photoinitiator are disposed in a liquid crystal cell. A principal surface of the liquid crystal cell is illuminated with ultraviolet light selected to have a non-uniform ultraviolet light intensity profile in the liquid crystal cell. The illuminating cooperates with the photoinitiator to polymerize at least a portion of the photoreactive monomer near the principal surface to generate a polymer network having a density corresponding to the non-uniform ultraviolet light intensity profile. The polymer network biases the liquid crystal toward a selected helical alignment direction. In some embodiments, the illuminating includes illuminating with first and second ultraviolet light intensity profiles to produce surface and volume polymer network components.
    Type: Grant
    Filed: March 1, 2006
    Date of Patent: March 3, 2009
    Assignees: Kent State University, Lachezar Komitov
    Inventors: Lachezar Komitov, Liang-Chy Chien, Sang Hwa Kim
  • Publication number: 20090015902
    Abstract: The thermally switched reflective optical shutter is a self-regulating “switchable mirror” device that reflects up to 100% of incident radiant energy above a threshold temperature, and reflects up to 50% of incident radiant energy below a threshold temperature. Control over the flow of radiant energy occurs independently of the thermal conductivity or insulating value of the device, and may or may not preserve the image and color properties of incoming visible light. The device can be used as a construction material to efficiently regulate the internal temperature and illumination of buildings, vehicles, and other structures without the need for an external power supply or operator signals. The device has unique aesthetic optical properties that are not found in traditional windows, skylights, stained glass, light fixtures, glass blocks, bricks, or walls.
    Type: Application
    Filed: July 11, 2008
    Publication date: January 15, 2009
    Inventors: Richard M. Powers, Wil McCarthy
  • Publication number: 20080316418
    Abstract: The invention relates to a liquid crystal (LC) material that aligns homeotropically on substrates with high or low surface energy.
    Type: Application
    Filed: May 16, 2006
    Publication date: December 25, 2008
    Inventors: Richard Harding, Matthew Francis, Owain Llyr Parri, Donald Gordon Graham, Shirley Ann Marden
  • Patent number: 7420647
    Abstract: The present invention relates to a method for producing a liquid crystal display device, in which a pretilt angle and a tilt direction upon application of a voltage of liquid crystal molecules are controlled by using a polymer and is to provide a method for producing a liquid crystal display device that provides good display characteristics.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: September 2, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yuji Nakahata
  • Publication number: 20040156008
    Abstract: A liquid crystal device comprises ferroelectric particles suspended in a liquid crystal material. A method for fabricating a light-modulating device is also disclosed. The method comprises the steps of providing a pair of substrates with a cell gap therebetween, wherein electrodes are disposed on the facing surfaces of the substrates, and permanently disposing a suspension of ferroelectric particles in a liquid crystal material into said cell gap. A method of generating an image comprises providing a pair of substrates with a cell gap therebetween, providing transparent electrodes on each of said substrates adjacent to the cell gap, permanently disposing a suspension of ferroelectric particles in a liquid crystal material within the cell gap, and applying an electric field across the electrodes.
    Type: Application
    Filed: March 25, 2004
    Publication date: August 12, 2004
    Inventors: Yurii Reznikov, Anatoliy Glushchenko, Victor Reshetnyak, John West
  • Patent number: 5784141
    Abstract: A phase spatial light modulator composed of a liquid crystal cell having molecular orientation recorded during the fabrication process as a direct result of a photochemical reaction exerted upon the liquid crystal material, a mechanically-induced change of a liquid crystal alignment layer, or by varying a plurality of polymer materials that compose the liquid crystal alignment layer, thereby affecting the liquid crystal material contained within the cell. The modulator, or scanner, thereby capable of altering the phase, thus steering light passing therethrough. During operation, the liquid crystal molecules deflect the light beam passing therethrough based on their orientation as recorded during fabrication when the applied voltage is "OFF" or in an altered state when the applied voltage is "ON".
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: July 21, 1998
    Assignee: Motorola, Inc.
    Inventors: Diana Chen, Phil Wright, Cheng-Ping Wei