Using Reflection Characteristic Patents (Class 349/176)
  • Patent number: 10690958
    Abstract: A beam deflector includes a first wavelength selective polarizer configured to convert a polarization state of light in a first wavelength band into a first polarization state, a first liquid crystal deflector including liquid crystal molecules and an optical path change surface to deflect light incident from the first wavelength selective polarizer, and a controller configured to control the first liquid crystal deflector to adjust an angle of the first optical path change surface.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: June 23, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kanghee Won, Young Kim, Hoon Song, Sunil Kim, Jungkwuen An, Sunghoon Lee, Hongseok Lee, Chilsung Choi
  • Patent number: 10670789
    Abstract: A method for recording a plurality of scatter volume holograms in a photopolymeric recording medium, the method including at least the following steps providing a first laser light source, providing a photopolymeric recording medium including a substrate and a photoactive layer, wherein the photopolymeric recording medium has an index modulation ?n of at least 0.04 and a thickness d of the photoactive layer of at least 25 ?m, and irradiating the photopolymeric recording medium with the first laser light beam generated by the first laser light source with a minimum irradiation energy dosage of 3*Di, Di being the inhibition dosage of the photoactive layer.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: June 2, 2020
    Assignee: Covestro Deutschland AG
    Inventors: Thomas Fäcke, Friedrich-Karl Bruder, Günther Walze, Andrey Putilin
  • Patent number: 10554962
    Abstract: A display device can include a first display configured to produce an image and a plurality of transparent displays. Each of the plurality of transparent displays can be configured to produce a slice of the image to provide depth and a three-dimensional effect to the image, or at least one of the plurality of transparent displays can be configured to block, diffuse, or scatter light associated with the image produced by the first display so that different ones of a plurality of users see different content derived from the image produced by the first display. Each of the transparent displays can be substantially transparent. Further, at least one of the plurality of transparent displays can be made using Smectic A liquid crystals.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: February 4, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sergio Perdices-Gonzalez, Sajid Sadi, Ernest Rehmatulla Post
  • Patent number: 10302846
    Abstract: Provided is a display device that can be realized with a simple configuration and functions as a transparent display allowing background to be clearly seen therethrough. When a liquid crystal panel is in an ON state, polarized backlight that is incident from a polarized backlight unit reaches a front surface. At this point, ambient light that is incident from a rear side also reaches the front surface. Accordingly, an observer who is on a front side of a transparent display can visually recognize an image that is displayed in an overlaid manner on the background seen through the transparent display. In a case where the liquid crystal panel is placed into an OFF state, the polarized backlight cannot reach the front surface of the transparent display, and the ambient light reaches the front surface.
    Type: Grant
    Filed: January 26, 2016
    Date of Patent: May 28, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Kenta Fukuoka
  • Patent number: 9374876
    Abstract: An electric lamp includes a first light source and a second light source and power circuitry configured to selectively energize the first light source and the second light source. The first light source is configured to produce light that is substantially free of wavelengths below about 530 nanometers, and the second light source is configured to product light having wavelengths of less than about 530 nanometers. The electric lamp is configured to produce white or near-white light in a variety of color temperatures, while retaining good color rendering index.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: June 21, 2016
    Inventors: Martin A. Alpert, Edward F. Carome, Richard L. Hansler, Vilnis E. Kubulins
  • Publication number: 20150116649
    Abstract: A light reflection layer, comprising a first liquid crystal layer obtained by fixing a first curable liquid crystal composition through curing in a state of a cholesteric liquid crystal phase, wherein the first curable liquid crystal composition contains a polymerizable liquid crystal compound, a fluoroalkyl group-containing alignment control agent, and a hydrophilic group-containing coating property imparting agent exhibits low haze, excellent heat shielding properties and improved coating properties when the light reflection layer obtained by fixing the cholesteric liquid crystal phase on the light reflection layer is laminated and coated.
    Type: Application
    Filed: September 25, 2014
    Publication date: April 30, 2015
    Applicant: FUJIFILM Corporation
    Inventor: Hidetoshi WATANABE
  • Publication number: 20150116648
    Abstract: An optical film may include a polarizer configured to linearly polarize a first light to provide a linearly polarized light component. The optical film may further include a first semi-transmissive film overlapping the polarizer, configured to transmit the linearly polarized light component, and configured to reflect a first circularly polarized component of a second light. The first circularly polarized component of the second light may have a first wavelength. The optical film may further include a second semi-transmissive film overlapping the first semi-transmissive film, configured to transmit the linearly polarized light component, and configured to reflect a second circularly polarized component of the second light. The second circularly polarized component of the second light may have a second wavelength that is unequal to the first wavelength.
    Type: Application
    Filed: May 15, 2014
    Publication date: April 30, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: NaYoung SHIN, Ji-Hoon KIM, Beong-hun BEON, Sang-Gu LEE, Daewon KIM, MINSU KIM, SEUNGBEOM PARK, Jung-Hun LEE, YUN JANG, Kyunghwan JEON
  • Patent number: 8994897
    Abstract: There is provided a reflective liquid crystal display device including a first liquid crystal panel containing a first liquid crystal material that reflects light of a first color, a second liquid crystal panel containing a second liquid crystal material that reflects light of a second color and a third liquid crystal material that reflects light of a third color, the second and third liquid crystal materials positioned to be distinct from each other, and a light absorption layer that is bonded to a lower surface of the second liquid crystal panel, wherein the second liquid crystal panel is bonded to a lower surface of the first liquid crystal panel, and the first to third liquid crystal materials reflect light in a planar state and transmit light in a focal conic state.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: March 31, 2015
    Assignee: Intellectual Discovery Co., Ltd.
    Inventors: Hyun Ha Hwang, Seung Gon Kang, Heon Kyu Kim
  • Patent number: 8994912
    Abstract: A transparent display device includes a cholesteric liquid crystal display (LCD) panel to display an image, a first polarized sheet arranged on one side of the cholesteric LCD panel, and a first ¼ phase delay sheet arranged between the first polarized sheet and the display panel.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: March 31, 2015
    Inventors: Chiachiang Hsiao, Chihwen Chen
  • Publication number: 20140160420
    Abstract: In an embodiment of the present disclosure, a liquid crystal display is provided. The liquid crystal display includes an upper substrate, a lower substrate opposite to the upper substrate, and a liquid crystal layer disposed between the upper substrate and the lower substrate, wherein the liquid crystal layer includes a first chiral compound and a second chiral compound, and the first chiral compound and the second chiral compound are enantiomeric and separated from each other.
    Type: Application
    Filed: May 6, 2013
    Publication date: June 12, 2014
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventor: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
  • Patent number: 8749750
    Abstract: A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. The discrimination medium includes an optically transparent first substrate on which a cholesteric liquid crystal layer is formed, the cholesteric liquid crystal layer being formed with a fine asperity used for displaying a hologram, an optically transparent second substrate on which a print layer is formed, the print layer having a predetermined pattern made of ink and having a transparent portion without the ink of the pattern around the pattern, the pattern reflecting or absorbing a light of a predetermined wavelength, and a transparent adhesive layer, wherein the optically transparent first substrate, the optically transparent second substrate, and the transparent adhesive layer, are disposed in turn from a side checked visually.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 10, 2014
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hidekazu Hoshino, Tokio Sakauchi, Mutsumi Sasaki, Tohru Ida, Naomi Iida
  • Patent number: 8749743
    Abstract: In a method of manufacturing a single-layer cholesteric liquid crystal display device, a liquid crystal composition of a cholesteric phase is formed between a first substrate and a second substrate. A plurality of liquid crystal layers are formed by sequentially adjusting the temperature of the cholesteric phase liquid crystal composition and performing a plurality of optical curing processes on the cholesteric phase liquid crystal composition. Each of the plurality of liquid crystal layers corresponds to one of the plurality of subpixels.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: June 10, 2014
    Assignees: Samsung Electronics Co., Ltd., Industry-University Cooperation Foundation Hanyang University
    Inventors: Jae-eun Jang, Jae-eun Jung, Kyu-young Hwang, Jae-hoon Kim, Kwang-soo Bae
  • Patent number: 8742772
    Abstract: A touch panel sensor with which unevenness of interference can be reduced is provided. A touch panel sensor of the present invention includes a film base material, a first transparent electrode pattern formed on a first face of the film base material, a first adhesive layer laminated on the first face of the film base material so as to cover the first transparent electrode pattern, a second transparent electrode pattern formed on a second face of the film base material, and a second adhesive layer laminated on the second face of the film base material so as to cover the second transparent electrode pattern, and the film base material has an in-plane phase difference of ?/4 with respect to a wavelength ? in the visible light region.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: June 3, 2014
    Assignee: Nitto Denko Corporation
    Inventors: Hiroyuki Takao, Naoki Tsuno, Katsunori Takada
  • Patent number: 8715528
    Abstract: The invention discloses a reflective liquid crystal material formulation, wherein a liquid crystal component of high dielectric anisotropy is employed to lower the driving voltage. By modulating the addition ratio of the high dielectric anisotropy components, reflective liquid crystal compositions of different reflective colors can be driven by a single driving voltage. The invention also provides a reflective bistable display using the above formulation.
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: May 6, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: An-Cheng Chen, Pei-Chen Huang, Chien-Hsien Cheng, Chun-Ming Wu, Shih-Hsien Jassy Liu, Kung-Lung Cheng
  • Patent number: 8648996
    Abstract: A method of producing a light-reflecting film having a light-reflecting layer on a resin film and reflecting 30% or more of incident light of a wavelength in the range of 800 to 2000 nm, includes a step of curing a cholesteric liquid crystal phase to form the light-reflecting layer, the cholesteric liquid crystal phase is obtained by mixing a chiral agent having an HTP of 30 ?m?1 or more expressed by Expression 1 into a starting solution by an in-line mixing method while supplying the starting solution prepared by dissolving a curable liquid crystal compound in a solvent, coating the resin film with the resultant coating solution, and drying the resultant.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: February 11, 2014
    Assignee: Fujifilm Corporation
    Inventor: Kazuhiro Oki
  • Patent number: 8576345
    Abstract: A cholesteric liquid crystal display is provided, including a substrate, a first electrode layer disposed on the substrate, and a liquid crystal layer disposed on the first electrode layer, wherein the liquid crystal layer comprises at least two liquid crystals having different sensitivities to driving frequencies, mixed with each other, and liquid crystals having a greater initial state-transition temperature are more sensitive to driving frequency.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: November 5, 2013
    Assignee: Industrial Technology Research Institute
    Inventors: Kai-Wei Lan, Chao-Wen Chen, Wan-Wen Chiu
  • Patent number: 8558799
    Abstract: The invention relates to a user interaction device (200, 300) comprising an optical module (210, 310) having a layer (5) of a substance being electrically switchable between a first visual state and a second visual state, and an electrical switch (6a, 6b) for electrically switching the substance between the first and second visual states, a detector (6a, 11b) for detecting the presence of a physical object, and a control unit (290, 390) for controlling the electrical switch in response to the detection of presence of the physical object.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: October 15, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Galileo June Destura, Armanda Cinderella Nieuwkerk, Johan Thomas Oostveen
  • Patent number: 8508695
    Abstract: A polymer-dispersed liquid crystal system has a continuous polymer structure having defined therein a plurality of discrete bodies of liquid crystal material. The bodies of liquid crystal material exhibit a polydomain operating state in which the liquid crystal material within each body is arranged in multiple domains, each domain being defined by a quantity of liquid crystal material whose molecules have a substantially common identifiable alignment in at least one axis, wherein the resolved alignments of neighboring domains diverge substantially from one another and are stable over time.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: August 13, 2013
    Assignee: Vlyte Innovations, Ltd
    Inventor: Donal O'Keeffe
  • Publication number: 20130135566
    Abstract: A manufacturing method of a reflective liquid crystal display device includes the following steps. Firstly, a first substrate and a second substrate are provided. A first channel, a second channel, and a third channel are formed between the first substrate and the second substrate. The first channel is filled with a first cholesteric liquid crystal. The second channel and the third channel are filled with a second cholesteric liquid crystal which includes a photoreactive cholesteric liquid crystal. An exposure process is then executed to modify the second cholesteric liquid crystal in the third channel into a third cholesteric liquid crystal.
    Type: Application
    Filed: November 23, 2012
    Publication date: May 30, 2013
    Applicants: WINTEK CORPORATION, DONGGUAN MASSTOP LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Dongguan Masstop Liquid Crystal Display Co., Ltd, Wintek Corporation
  • Publication number: 20130107187
    Abstract: A pixel structure having a plurality of display regions is provided. The pixel structure includes a transparent substrate, an active device layer, and a plurality of reflective display units. The transparent substrate has a first side and a second side opposite to each other. The active device layer is disposed on one of the first side and the second side of the substrate. The reflective display units are respectively located in the display regions and driven by the active device layer. Two reflective display units are located at the same display region to provide different display colors. Two closely adjacent display regions provide different display colors when display simultaneously.
    Type: Application
    Filed: April 17, 2012
    Publication date: May 2, 2013
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Min-Yao Lu, Yu-Yang Chang, Chao-Chiun Liang, Heng-Yin Chen
  • Patent number: 8421987
    Abstract: A discrimination medium, which can have much information, can be produced on a small scale at low cost, and enables change of a sticker design at low cost, is provided. A cholesteric liquid crystal layer, having a fine asperity for forming a hologram, is formed on a transparent first substrate. A print layer composed of a black ink is formed on a transparent second substrate. The substrates are affixed to each other via a bond layer, so that a discrimination medium is obtained. In the discrimination medium, the display content obtained by the print layer is changed, so that the display content for discrimination can be changed at low cost.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: April 16, 2013
    Assignee: NHK Spring Co., Ltd.
    Inventors: Hidekazu Hoshino, Tokio Sakauchi, Mutsumi Sasaki, Tohru Ida, Naomi Iida
  • Patent number: 8345206
    Abstract: A liquid crystal display includes a liquid crystal layer causing a selective reflection and exhibiting Kerr effect, first and second electrodes applying voltage to the liquid crystal layer, a first circular polarizer disposed between the liquid crystal layer and a viewer and allowing a first circularly polarized light incident on the liquid crystal layer when irradiated with a natural light, the first circularly polarized light having an electric-field vector rotating in a direction reverse to a rotation direction of an electric-field vector of a circularly polarized light selectively reflected by the liquid crystal layer, and a second circular polarizer facing the first circular polarizer with the liquid crystal layer interposed therebetween and allowing a second circularly polarized light incident on the liquid crystal layer when irradiated with a natural light.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: January 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Rei Hasegawa, Yuko Kizu, Hajime Yamaguchi
  • Patent number: 8329058
    Abstract: A photodisplay device in which an optically addressed image can be viewed indefinitely, erased and readdressed with a new image is disclosed. Optically responsive reversible photochiral materials are incorporated into a bistable cholesteric liquid crystal in an electrooptic display cell. A high resolution image exposed on the cell is fixed by a low voltage pulse to unpatterned electrodes and can be, at a later time, erased with a high voltage pulse.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: December 11, 2012
    Assignees: Kent Displays Incorporated, Kent State University
    Inventors: Quan Li, Lisa M. Green, J. William Doane, Asad A. Khan, Nithya Venkataraman, Irina Shiyanovskaya
  • Patent number: 8310631
    Abstract: In this disclosure, a blue colorant is added in the adhesion layer of a reflective polarizer to compensate the chromaticity difference caused by the reflective polarizer itself and large horizontal viewing angle. The chromaticity difference can be further reduced by adding beads in the adhesion layer and/or forming light-gathering microstructures on the outer surface of the quarter wave plate of the reflective polarizer.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: November 13, 2012
    Assignee: Eternal Chemical Co., Ltd.
    Inventors: Yu-Ming Sun, Chin-Yi Liao
  • Patent number: 8269923
    Abstract: A multilayer liquid crystal display element has a plurality of data electrode layer-to-layer interconnects formed in a non-display area of a liquid crystal display panel for connecting data electrodes of liquid crystal display panels for R, G, and B to a plurality of data signal input terminals from layer to layer, and a plurality of scanning electrode layer-to-layer interconnects formed in the non-display area for connecting scanning electrodes of the liquid crystal display panels for R, G, and B to a plurality of scan signal input terminals from layer to layer.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: September 18, 2012
    Assignee: Fujitsu Limited
    Inventors: Fumio Yamagishi, Junji Tomita, Hisashi Yamaguchi
  • Patent number: 8203688
    Abstract: A liquid crystal display includes: a transparent first substrate placed on the display plane side; a transparent second substrate opposed to the first substrate; a cholesteric liquid crystal that is placed between the first and second substrates and whose selective reflection color is yellow; and a reflector for white/blue display opposed to the second substrate. The angular dependence of scattered light intensity of the reflector for white/blue display is equivalent to the angular dependence of scattered light intensity of the cholesteric liquid crystal.
    Type: Grant
    Filed: February 22, 2008
    Date of Patent: June 19, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Ippei Inoh
  • Patent number: 8199086
    Abstract: The invention comprises a stacked color photodisplay apparatus using a photosensitive cholesteric liquid crystalline material on which an image can be optically addressed, retained without degradation for an indefinite period of time, electrically erased and a new image addressed. This is similar to a photographic film except that the photodisplay film can be used over and over again similar to digital display but without the cost of addressing electronics. Included is a device for enhancing the brightness of the image and electrooptical devices for optically writing digital images on the photodisplay. Each cell in the stack can be selectively addressed with a different optical image such as the red, green and blue components of a color digital image.
    Type: Grant
    Filed: July 1, 2008
    Date of Patent: June 12, 2012
    Assignee: Kent Displays Incorporated
    Inventors: J. William Doane, Asad A. Khan, Erica Montbach, Nithya Venkataraman
  • Patent number: 8149343
    Abstract: The present invention relates to a display device having an image-emitting panel and an image dividing sheet. The image-emitting panel includes a light-blocking layer, a lower substrate, an upper substrate and an electro-optic layer. The lower substrate includes pixel electrodes into which a first image signal and a second image signal having different viewing angles are applied in a spatial dividing method. The electro-optic layer reflects a circularly polarized light towards the upper substrate. The image dividing sheet includes a first optical element and a second optical element. The first optical element converts the circularly polarized light into a first light corresponding to the first image signal. The second optical element converts the circularly polarized light into a second light corresponding to the second image signal.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: April 3, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nak-Cho Choi, Sung-Woon Kim, Hee-Keun Lee
  • Patent number: 8081289
    Abstract: An enhanced wavelength-converting structure is disclosed. The enhanced wavelength-converting structure includes a substrate, a wavelength-converting layer arranged next to the substrate, and a wavelength-selective reflecting layer arranged next to the wavelength-converting layer. The wavelength-converting layer converts the first light into the second light. A part of the second light radiating backward to the light source is further reflected toward the substrate by the wavelength-selective reflecting layer to form the enhanced second light by combining with another part of the second light radiating toward the substrate.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: December 20, 2011
    Assignee: Universal Optoelectronics Co., Ltd.
    Inventors: Yu-Ping Lin, Chih-Yuan Chen, Pei-Ju Lai, Ding-He Chen
  • Patent number: 8023079
    Abstract: The present invention provides a touch panel and a liquid crystal display. The liquid crystal display includes a panel, a plurality of reflective coding patterns printed on the panel, and a polarizing plate positioned on the panel, wherein the reflective coding patterns include a plurality of cholesteric liquid crystal molecules having a pitch length and a index of refraction, and the pitch length multiplied by the index of refraction is within a range of an infrared ray wavelength.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: September 20, 2011
    Assignee: HannStar Display Corporation
    Inventors: Wei-Chou Chen, Kei-Hsiung Yang
  • Patent number: 8004646
    Abstract: A reflective liquid crystal display that comprises: a first substrate; a common electrode formed on the first substrate; a second substrate corresponding to the first substrate; a pixel electrode formed on the second substrate; partitions formed between the common electrode and the pixel electrode; red, green, and blue cholesteric liquid crystals formed in regions separated by the partitions; and sealing lines formed on the outer peripheries of the partitions and having three liquid crystal injection holes.
    Type: Grant
    Filed: April 10, 2009
    Date of Patent: August 23, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Nak-Cho Choi, Fusayuki Takeshita
  • Patent number: 7843530
    Abstract: A liquid crystal-containing composition includes a first cholesteric liquid crystal having a peak wavelength of selective reflection in the range of from 600 nm to 800 nm and encapsulated in a microcapsule and a second cholesteric liquid crystal having a peak wavelength of selective reflection in the range of from 400 nm to 500 nm as the only liquid crystals, and the content of the second cholesteric liquid crystal with respect to the entire cholesteric liquid crystal content is from about 5 weight % to about 40 weight %.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: November 30, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Naoki Hiji, Takeo Kakinuma, Chikara Manabe, Tadayoshi Ozaki
  • Patent number: 7812919
    Abstract: This invention relates to a method of fabrication of liquid crystal light modulating devises having electrically tunable spectral wavelength and more particularly, to a cholesteric liquid crystal display with electrically switchable colors. The cholesteric light modulators may be fabricated by applying a plurality of layers to maximize the light modulation. It also features a polymer composite or polymer-network stabilized cholesteric liquid crystal with electrically switchable Bragg reflected wavelength within a predetermined range of spectral wavelength.
    Type: Grant
    Filed: July 9, 2007
    Date of Patent: October 12, 2010
    Assignee: Kent State University
    Inventors: Liang-Chy Chien, Shin-Ying Lu
  • Patent number: 7742136
    Abstract: A sheet with anti-counterfeit functions for making counterfeiting highly difficult in the case where authentication information is recorded using the properties of cholesteric liquid crystal is provided. A cholesteric liquid crystal layer 110 having a selective reflected wavelength band in at least the visible light region is provided in such a manner that this cholesteric liquid crystal layer 110 is a single layer of which thickness is approximately uniform, and an authentication region 112 of which selective reflected wavelength band is different is provided in at least one place. Preferably, an adhesive layer 130 is provided on one side of the cholesteric liquid crystal layer 110. Preferably, a base 120 is provided between the cholesteric liquid crystal layer 110 and the adhesive layer 130. Preferably, a light absorbing layer 140 is provided on adhesive layer 130 of the cholesteric liquid crystal layer 110.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: June 22, 2010
    Assignee: Nitto Denko Corporation
    Inventors: Seiji Umemoto, Miki Shiraogawa, Takahiro Fukuoka, Naoki Takahashi, Kentarou Takeda
  • Publication number: 20100134724
    Abstract: A polymerizable liquid crystal compound, a polymerization initiator, and a chiral agent, and a surfactant, orientation adjuster or the like as necessary are dissolved in a solvent to obtain a embrocation, the embrocation is laminated on an isotropic transparent film in a film state and dried, and the dried film is polymerized to give an optical element in which a lower limit ?L of a band reflecting light at an incident angle of 0 degrees is longer than a wavelength ?R1 of light indicating the maximum emission intensity in a wavelength band of 600 nm to 700 nm in the light emitted by a light source, and an average transmittance of the light with the wavelength 600 nm to 700 nm at the incident angle of 60 degrees is 40% or more and 90% or less.
    Type: Application
    Filed: August 10, 2006
    Publication date: June 3, 2010
    Applicant: ZEON CORPORATION
    Inventors: Kohei Arakawa, Toshihiko Hore, Shuhei Okude, Manabu Haraguchi
  • Patent number: 7652736
    Abstract: An infrared light reflecting article is disclosed and includes a visible light transparent substrate including a polymer and an infrared light reflecting cholesteric liquid crystal layer disposed on the substrate. The substrate and infrared light reflecting cholesteric liquid crystal layer have a combined haze value of less than 3%.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: January 26, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Raghunath Padiyath, Marc D. Radcliffe, Cristina U. Thomas, Charles A. Marttila, Manish Jain, Michael F. Weber, Feng Bai
  • Publication number: 20100014038
    Abstract: A cholesteric display may be formed, in some embodiments, using a single display element to produce multi-colors for display. A cholesteric material may be sandwiched between a pair of substrates, each associated with pairs of opposed electrodes that are arranged in general transversely to the optical axis of incident light. The first pair of electrodes produce one of two liquid crystal states and result in the reflection of light of a particular wavelength. Light of other wavelengths may be reflected when a second pair (or set) of opposed electrodes, arranged in general transversely, also to the optical axis of incident light, are biased appropriately. So does a third pair (or set) of electrodes. A black and white color display may be generated from a single display element by modulating the pitch length of the cholesteric material within each pairs (or sets).
    Type: Application
    Filed: September 28, 2009
    Publication date: January 21, 2010
    Inventors: David B. Chung, Daniel J. Lenehan
  • Patent number: 7633581
    Abstract: A reflective colour display device comprising a display element including two opposed cell walls enclosing a layer of an electro-optic material, each cell wall being provided with at least one electrode on an inner surface thereof for applying an electric field across at least some of the electro-optic material, and a selective reflector on one of said cell walls, wherein the electro-optic material is electrically-switchable between a first state in which the display element will diffusely reflect substantially all wavelengths of visible light transmitted by the selective reflector, and a second state in which the display element will reflect light transmitted by the selective reflector at a substantially lower intensity than it does when the electro-optic material is in the first state.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: December 15, 2009
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: David Sikharulidze
  • Patent number: 7629034
    Abstract: A novel optical compensation film is disclosed. The optical compensation film comprises a first optically anisotropic layer and a second optically anisotropic layer, each of which formed of a composition comprising a liquid-crystalline compound, wherein molecules of the liquid-crystalline compound in each of the first and second optically anisotropic layers are fixed in a hybrid alignment state in which tilt angles of the molecules with respect to a layer plane varies in a thickness direction.
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: December 8, 2009
    Assignee: Fujifilm Corporation
    Inventors: Yuta Takahashi, Michio Nagai
  • Patent number: 7575787
    Abstract: The invention has an object to provide a liquid crystal composite capable of sufficiently reducing the scattering of light in a focal conic state, a liquid crystal display element excellent in improvements of a color balance and a contrast, and electronic paper using the same. The content of a chiral material is higher in a cholesteric liquid crystal LCg for G than in a cholesteric liquid crystal LCb for B, and is higher in a cholesteric liquid crystal LCr for R than in the cholesteric liquid crystal LCg for G. The cholesteric liquid crystal LCr for R is prepared by mixing about 5 wt % of a chiral material CHl1 of an L-form with a base liquid crystal of an R-form, which contains 27 wt % of CHr1 of the R-form exhibiting a liquid crystallizability for a nematic liquid crystal LCn, and 3 wt % of a chiral material CHr2 of the R-form exhibiting no crystallizability.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: August 18, 2009
    Assignee: Fujitsu Limited
    Inventors: Masaki Nose, Junji Tomita, Yoshihisa Kurosaki
  • Patent number: 7564518
    Abstract: This invention relates to a high brightness and high contrast ratio reflective cholesteric displays employing circular polarizers. The front circular polarizer has a predetermined polarity that is opposite both to the Bragg reflection of the display and to the back reflective circular polarizer. An absorptive weak polarizer with high transmittance is adopted in the display system. In the black-and-white display mode, the white state is achieved in the cholesteric focal conic texture area; and the black state is obtained in the cholesteric planar texture area. In the full color mode, the full color state is created by the micro-color filter in the cholesteric focal conic texture area; and the black state is realized in the cholesteric planar texture area.
    Type: Grant
    Filed: June 10, 2005
    Date of Patent: July 21, 2009
    Inventor: Yao-Dong Ma
  • Patent number: 7510748
    Abstract: Disclosed is a broadband reflection type brightness enhancement polarizer, which includes a cholesteric liquid crystal film laminate having a broadband selective reflecting wavelength range in which a plurality of cholesteric liquid crystal films having selective reflecting wavelength ranges different from each other by having different mixture ratios of a curable nematic liquid crystal compound expressed by the chemical formula 1 and a curable chiral compound expressed by the chemical formula 2 are laminated; and a film having ¼? phase difference laminated on one surface of the cholesteric liquid crystal film laminate. This polarizer has wide selective reflecting wavelength ranges of the cholesteric liquid crystal films composing the polarizer, so the entire visible ray range can be covered just by laminating several cholesteric liquid crystal films.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: March 31, 2009
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Sung-Tae Kim, Ki-Cheol Yoon, Keon-Il Kim, Nam Ki, Hunkyun Pak, Jea-Chul Jung
  • Patent number: 7507507
    Abstract: The invention provides a liquid crystal display device in which incorporation of an organic compound into liquid crystal due to a display defect can be reduced to a great extent. In the liquid crystal display device, a film containing a hydrocarbon represented by the formula CnH2n+2, in which n is from 5 to 30, is formed on a face, which comes in contact with the liquid crystal, of each of a pair of substrates which are arranged in a manner of facing each other via the liquid crystal.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: March 24, 2009
    Assignee: Hitachi Displays, Ltd.
    Inventors: Noboru Ooki, Ken Hashimoto, Miyuki Kunimatsu, Noriyuki Okabe
  • Patent number: 7507448
    Abstract: A process for optical alignment in which an alignment layer is irradiated with polarized light from a light source and optical alignment is carried out, and in which polarized light is emitted within the light irradiation area of the light source with differently aligned polarization axes. In doing so, the alignment layer and the light irradiation area are moved relative to one another so that the divergence of the polarization axes of the polarized light is essentially cancelled relative to one another and the direction of optical alignment in the alignment layer is made uniform.
    Type: Grant
    Filed: September 15, 2005
    Date of Patent: March 24, 2009
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventor: Sayu Shiotani
  • Patent number: 7501162
    Abstract: A liquid crystal display which can secure long-time reliability of the display performance by stabilizing alignment characteristics of vertically aligned liquid crystal for a long time provided. The liquid crystal display device includes a semiconductor driver substrate and a transparent electrode substrate which are arranged appositely to each other; alignment films covering surfaces of the semiconductor driver substrate and the transparent electrode substrate, the surfaces facing each other, the alignment films containing silicon oxide and one or more moisture trap elements for trapping moisture; and vertically aligned liquid crystal enclosed between the semiconductor driver substrate and the transparent electrode substrate with the alignment film in between.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: March 10, 2009
    Assignee: Sony Corporation
    Inventor: Shunichi Hashimoto
  • Patent number: 7495894
    Abstract: A structure of a liquid crystal display includes a first housing, a display panel module, a second housing, and a frame-structure layer. The first housing includes a first wall forming a compartment for the display panel module. The second housing includes a covering plane and a second wall. An edge of the display panel module is covered by the covering plane, and the first wall is surrounded by the second wall. The frame-structure layer is positioned between the first housing and the second housing.
    Type: Grant
    Filed: February 8, 2006
    Date of Patent: February 24, 2009
    Assignees: Innocom Technology (Shenzhen) Co. Ltd, Innolux Display Corp.
    Inventors: Chuan-Pei Yu, Chung-Liang Hsiao
  • Publication number: 20090009710
    Abstract: A method of forming a liquid crystal display includes determining an illuminant blue peak wavelength, an illuminant green peak wavelength, and an illuminant red peak wavelength, and assembling a liquid crystal display with a blue light reflecting liquid crystal layer having a blue peak reflection wavelength being a shorter wavelength than the illuminant blue peak wavelength, and a green light reflecting liquid crystal layer having a green peak reflection wavelength substantially equal to or longer than the illuminant green peak wavelength, and a red light reflecting liquid crystal layer having a red peak reflection wavelength being a longer wavelength than the illuminant red peak wavelength. Liquid crystal displays are also described.
    Type: Application
    Filed: July 3, 2007
    Publication date: January 8, 2009
    Inventors: Manoj Nirmal, Jane K. Wardhana, Jason C. Radel
  • Patent number: 7473447
    Abstract: A liquid crystal display device, comprising: a liquid crystal layer comprising a cholesteric liquid crystal and a self-organizing type gelling agent, and a manufacturing method thereof, comprising: spreading a cholesteric liquid crystal containing a gelling agent in a heated state over at least one of substrates to form a liquid crystal layer, or a manufacturing method thereof, comprising: spreading a cholesteric liquid crystal that contains a gelling agent and exhibits flowability at room temperature over at least one of substrates to form a liquid crystal layer.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: January 6, 2009
    Assignee: Konica Minolta Holdings, Inc.
    Inventor: Tomoo Izumi
  • Patent number: 7455895
    Abstract: The present invention relates to a polarizing liquid crystal film having no alignment layer and a method for manufacturing the same, a light guide plate integrated with the polarizing liquid crystal film, and a backlight unit. The polarizing liquid crystal film of the present invention includes an adhesive layer, a liquid crystal layer aligned on one side of the adhesive layer, and a protection film arranged on an opposite side of the adhesive layer to protect the liquid crystal layer. Further, the method for manufacturing a polarizing liquid crystal film includes preparing a liquid crystal alignment film, aligning liquid crystal on the liquid crystal alignment film, providing an adhesive layer on the liquid crystal, attaching a protection film protecting the liquid crystal on the adhesive layer, and exfoliating the liquid crystal alignment film. Furthermore, there is provided a light guide plate integrated with the polarizing liquid crystal film and a backlight unit including the same.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: November 25, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seong Sik Choi, Sung Tae Kim, Hun Kyun Pak, Tae Seok Jang
  • Patent number: 7435357
    Abstract: The invention relates to a polymerised liquid crystal (LC) film comprising at least one photoisomerisable compound and having a pattern of regions with different retardation and/or different orientation of the LC material, to methods of preparing such a film, and to its use as alignment layer, optical retardation film or optical waveguide in liquid crystal displays or other optical or electrooptical components or devices, or for decorative or security applications.
    Type: Grant
    Filed: April 2, 2004
    Date of Patent: October 14, 2008
    Assignee: Merck Patent GmbH
    Inventors: Richard Harding, Shirley Ann Marden, Ian Victor Edward Hassall, Janice McCreary, Karl Skjonnemand