Wherein Liquid Crystal Cells Include Microencapsulated Or Polymer Dispersed Liquid Crystal Patents (Class 349/10)
  • Patent number: 10490609
    Abstract: An OLED touch display device includes an OLED display and a laminated package component. The laminated package component covers the OLED display and includes a quarter-wave plate, a liquid crystal polarizer and a touch sensor unit. The touch sensor unit is a single-layer electrode structure.
    Type: Grant
    Filed: April 5, 2017
    Date of Patent: November 26, 2019
    Assignee: TPK Touch Solutions Inc.
    Inventors: Chen-Yu Liu, Li-Wei Kung, Hsi-Chien Lin
  • Patent number: 10423022
    Abstract: A light shielding apparatus that may transmit or shield light by using a plurality of PDLC layers, a method of fabricating the light shielding apparatus, and a transparent display device including the light shielding apparatus are discussed. The light shielding apparatus can include first and second substrates facing each other; a first electrode on the first substrate; a second electrode on the second substrate; and first and second polymer dispersed liquid crystal layers between the first electrode and the second electrode, wherein the first polymer dispersed liquid crystal layer includes first droplets having first liquid crystals, and the second polymer dispersed liquid crystal layer includes second droplets having second liquid crystals and first dichroic dyes.
    Type: Grant
    Filed: May 28, 2015
    Date of Patent: September 24, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Moon Sun Lee, Ji Young Ahn, Pu Reum Kim, Ki Han Kim
  • Patent number: 10327300
    Abstract: Apparatus and associated methods relate to a Dynamic Ultraviolet Light System (DUVLS) that directs ultraviolet (UV) light at an intensity controlled by a user or in response to an ambient light level to maintain a photochromic target lens in a darkened state. In an illustrative example, the target lens may be located in a brightly lighted environment separated by a UV filter from a broadband light source, such as the sun. The dynamic ultraviolet light system may have its output intensity regulated by a user or by a controller responsive to a light sensor. The light sensor may be configured to detect the ambient light level to which the target lens is being exposed. Various embodiments may advantageously enhance a user's vision by maintaining the user's spectacles with photochromic lenses, in a darkened state while the user is in a brightly lighted environment with substantially attenuated natural UV light levels.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: June 18, 2019
    Inventor: Paul Dickie
  • Patent number: 10031555
    Abstract: An information handling system includes a flexible display screen, first and second display platforms, and a plurality of micro-beads. The flexible display screen is movably mounted to the first and second display platforms. The plurality of micro-beads is coated on the flexible display screen, and the plurality of micro-beads comprises a protective layer of increase hardness relative to the flexible display screen.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: July 24, 2018
    Assignee: Dell Products, LP
    Inventors: Lawrence E. Knepper, Deeder M. Aurongzeb, John Trevor Morrison, Patrick Hampton
  • Patent number: 10025008
    Abstract: In order to manufacture a lens array substrate including a multistage lens array which is formed on a translucent substrate, a first lens layer, a first translucent layer, a second lens layer, and a second translucent layer are stacked in order on a mother substrate. At the same time, a first metal layer is formed between the first lens layer and the first translucent layer, and in the removing of the first metal layer, the first metal layer is removed from a position overlapping with at least the center of a concavity in a plane view, and remains at least at an end portion of the mother substrate as a first buffer layer.
    Type: Grant
    Filed: July 6, 2015
    Date of Patent: July 17, 2018
    Assignee: Seiko Epson Corporation
    Inventor: Satoshi Ito
  • Patent number: 9978304
    Abstract: An OLED touch display device includes an OLED display and a laminated package component covering the OLED display and including a quarter-wave plate, a liquid crystal polarizer, a first touch sensor layer and a second touch sensor layer. The first touch sensor layer and the second touch sensor layer are configured to cooperatively detect touch events.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 22, 2018
    Assignee: TPK Touch Solutions Inc.
    Inventors: Chen-Yu Liu, Li-Wei Kung, Hsi-Chien Lin
  • Patent number: 9647041
    Abstract: An OLED touch display device includes an OLED display and a laminated package component. The laminated package component covers the OLED display and includes a quarter-wave plate, a liquid crystal polarizer and a touch sensor unit. The touch sensor unit is a single-layer electrode structure.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: May 9, 2017
    Assignee: TPK Touch Solutions Inc.
    Inventors: Chen-Yu Liu, Li-Wei Kung, Hsi-Chien Lin
  • Patent number: 9519135
    Abstract: A mirror array is positioned in relationship to a high intensity power light source to receive at least a portion of a high intensity light beam and to reflect at least a portion of the high intensity light beam. An aperture plate is positioned between the high intensity power light source and the mirror array. The aperture plate has an open area and an opaque area, the open area including a main portion and a tab portion. The main portion is located on a side of the tab portion distal from an incident light direction of the received high intensity beam of light. The open area is sized and positioned to allow rays of the high intensity beam of light to be passed through the tab portion and reflections of the passed rays of the high intensity beam of light to exit through the main portion.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: December 13, 2016
    Assignee: Palo Alto Research Center Incorporated
    Inventors: Lars-Erik Swartz, David K. Biegelsen, Patrick Y. Maeda
  • Patent number: 9411378
    Abstract: An information handling system includes a flexible display screen, first and second display platforms, and a plurality of micro-beads. The flexible display screen is movably mounted to the first and second display platforms. The plurality of micro-beads is coated on the flexible display screen, and the plurality of micro-beads comprises a protective layer of increase hardness relative to the flexible display screen.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: August 9, 2016
    Assignee: DELL PRODUCTS, LP
    Inventors: Lawrence E. Knepper, Deeder M. Aurongzeb, John Trevor Morrison, Patrick Hampton
  • Patent number: 9252194
    Abstract: An EC region (second region) of an organic EL display device (1) has an optical interference layer which is a multilayer of (i) an edge cover (7) made from an acrylic resin having a lower refractive index, (ii) an organic layer (8), and (iii) a second electrode (9) which is a thin and semi-transparent film. Therefore, the organic EL display device (1) can suppress a deterioration in contrast without narrowing a display region, and can have a high reliability.
    Type: Grant
    Filed: January 28, 2013
    Date of Patent: February 2, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Ochi, Manabu Niboshi, Shinichi Kawato, Yuto Tsukamoto, Katsuhiro Kikuchi, Tomohiro Kosaka
  • Patent number: 9239494
    Abstract: A liquid crystal device comprising a first substrate; a second substrate; and a liquid crystal layer sandwiched between the first substrate and the second substrate, the liquid crystal layer comprising a nematic liquid crystal material and a polymer network. The polymer network is anchored to said first substrate and is configured to alternatingly induce splay deformation and bend deformation of the nematic liquid crystal material along a line parallel with the first substrate. Hereby, the relaxation time ?fall of the liquid crystal device is reduced.
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: January 19, 2016
    Inventors: Lachezar Komitov, Gurumurthy Hegde, Seung Hee Lee
  • Patent number: 9158146
    Abstract: A projector can be easily attached by mounting a connecting unit to a socket for illumination in an ordinary home. Since the projector includes a communication unit configured to receive an electronic mail, the projector updates an image signal and adjusts a diffusion degree of modulated light by a light-diffusion adjusting unit on the basis of contents of the mail received by the communication unit. Therefore, when a user desires to inform family members who will return home that the user suddenly has to go out, if the user transmits in advance, to the projector, a mail including a message for a family member who returns home, the family member who returns home turns on an illumination switch at the entrance, whereby the projector can start up, perform an illuminating function, and clearly project and display the message.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: October 13, 2015
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tadashi Kinebuchi, Kaoru Yamaguchi
  • Patent number: 8842247
    Abstract: In an embodiment, an optical device includes a first substrate; a second substrate; a liquid crystal layer; a plurality of first electrodes; a second electrode; and a light shielding portion. The liquid crystal layer provided between the first substrate and the second substrate. The plurality of first electrodes is provided on the first substrate and arranged in a first direction, extending in a second direction. The second electrode is provided on the second substrate. The light shielding portion is configured to be provided at a position between the first substrate and the second substrate to overlap with the first electrodes when viewed from the third direction. The light shielding portion covers a less space than the first electrodes.
    Type: Grant
    Filed: July 17, 2012
    Date of Patent: September 23, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masako Kashiwagi, Shinichi Uehara, Ayako Takagi
  • Patent number: 8497958
    Abstract: Example embodiment are directed to a reflective display device including a polymer-dispersed liquid crystal (PDLC) layer between a first substrate and a second substrate, and a mirror reflection plate on the first substrate.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: July 30, 2013
    Assignees: Samsung Electronics Co., Ltd., Konkuk University Industrial Cooperation Corp.
    Inventors: Jae-eun Jang, Jae-eun Jung, Gae-hwang Lee, Young-Jae Jeon, Jin Woo Lee
  • Patent number: 8259166
    Abstract: A display device for capturing and displaying images along a single optical axis, having an image capture device for capturing the objective image through the display panel when the display device is in a second transmissive state; an image supply source for providing an image to a display panel when the display panel is in a first display state; a mechanism for alternating placing the display panel between the first display state and second transmissive state such that an image can be viewed on the display screen and the object can be captured such that the alternating between the first display state and the second transmissive state is substantially imperceptible to a user of the display panel; and a mechanism for providing digitally image processing for captured images prior to display.
    Type: Grant
    Filed: June 2, 2010
    Date of Patent: September 4, 2012
    Assignee: Eastman Kodak Company
    Inventor: Joseph A. Manico
  • Patent number: 8233099
    Abstract: Disclosed is an apparatus and method for making temporary colorful birefringent displays. In its preferred embodiment, cellophane 104 is laminated between self-adherent vinyl sheets 108 with non-water soluble adhesive 112 and desired shapes 212 are cut therefrom. Plane polarizing filter 213 is similarly laminated between sheets of self-adherent vinyl 214. One of the polarizer laminations is adhered to a gloss surface such as a window 217. Shapes 212 cut from the cellophane-vinyl laminations are adhered to the polarizer lamination 215. Colors created by the polarized light passing through the birefringent cellophane laminations 100 are viewed through a polarizing analyzer 230 which can be a second lamination of polarizer between self-adherent vinyl sheets and placed over the completed design, or through analyzers held separately from the design such as polarized glasses 218 or hand held viewers 222, 230. Transmissive 214 and reflective 304 and transflective 604 types are disclosed.
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: July 31, 2012
    Inventors: Austine Wood Comarow, David Comarow, Rufus Butler Seder
  • Patent number: 8182092
    Abstract: An image display apparatus includes a light source, a color separation unit configured to separate light from the light source into colored light beams, liquid crystal display devices each configured to modulate a corresponding one of the colored light beams in accordance with an image signal, light-shielding members each configured to block light that enters an area outside an effective display area of a corresponding one of the liquid crystal display devices, a color combination unit configured to combine the colored light beams that have been modulated by the liquid crystal display devices, and a projection unit configured to project light produced by combining the colored light beams with the color combination unit, wherein the liquid crystal display devices are fixed to a heatsink, and wherein the light-shielding members each include a base member fixed to the heatsink and a mask member detachably mounted on the base member.
    Type: Grant
    Filed: July 26, 2011
    Date of Patent: May 22, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hidetomo Tanaka
  • Patent number: 8115722
    Abstract: A liquid crystal display having reduced power consumption. The liquid crystal display includes a liquid crystal display panel having a plurality of pixels and a plurality of pixel memories. A pixel voltage is stored in a pixel memory in an on screen display (OSD) region of the liquid crystal display panel for displaying a still image for a long period of time and driving a liquid crystal cell by the stored pixel voltage. Also, the power consumption of the liquid crystal display can be reduced by using a NAND gate or a NOR gate as a circuit element for alternating a voltage between low level and high level so as to store a pixel voltage in a pixel memory of the liquid crystal display.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: February 14, 2012
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventor: Junghwan Kim
  • Patent number: 8049825
    Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A birefringent wedge (221) is disposed between at least one of the laser sources (201) and the light modulator (203). The birefringent wedge (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207). An optional glass wedge (1004) can be used to correct optical path deviation (1001) introduced by the birefringent wedge (221).
    Type: Grant
    Filed: April 16, 2009
    Date of Patent: November 1, 2011
    Assignee: Microvision, Inc.
    Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
  • Patent number: 8007112
    Abstract: An image display apparatus includes a light source, a color separation unit configured to separate light from the light source into colored light beams, liquid crystal display devices each configured to modulate a corresponding one of the colored light beams in accordance with an image signal, light-shielding members each configured to block light that enters an area outside an effective display area of a corresponding one of the liquid crystal display devices, a color combination unit configured to combine the colored light beams that have been modulated by the liquid crystal display devices, and a projection unit configured to project light produced by combining the colored light beams with the color combination unit, wherein the liquid crystal display devices are fixed to a heatsink, and wherein the light-shielding members each include a base member fixed to the heatsink and a mask member detachably mounted on the base member.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: August 30, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hidetomo Tanaka
  • Patent number: 7947525
    Abstract: A method for manufacturing a liquid crystal display includes the following steps. First, source/drain and a bottom electrode are formed over a color filter substrate with a color filter layer. The next step forms source/drain junction regions over the source/drain. A channel region is also formed between the source/drain in this step. A gate dielectric layer and a gate are formed over the channel region and the source/drain junction regions in this step as well. Moreover, a plurality of stack layers and an upper electrode are formed over the bottom electrode in this step, too. Then, a pixel electrode is formed to electrically connect one of the source/drain and the bottom electrode. Then, a passivation layer pattern is formed to cover the source/drain, the gate, the upper electrode and the bottom electrode by backside exposure. Finally, a plurality of steps are performed to finish the liquid crystal display.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: May 24, 2011
    Assignee: AU Optronics Corporation
    Inventor: Ming-Hung Shih
  • Publication number: 20100265420
    Abstract: An imaging system (200), such as a scanned laser projection system, includes one or more laser sources (201) configured to produce one or more light beams (204), and a light modulator (203) configured to produce images (206) from the light beams (204). Optional optical alignment devices (220) can be used to orient the light beams (204) into a combined light beam (205). A beam separator (221), which can be any of a birefringent wedge, compensated birefringent wedge, or a polymerized liquid crystal layer, is disposed between at least one of the laser sources (201) and the light modulator (203). The beam separator (221) is configured to receive light from the laser sources (201) and deliver two angularly separated and orthogonally polarized light beams (223) to the light modulator (203) so as to reduce speckle appearing when the images (206) are displayed on a display surface (207).
    Type: Application
    Filed: September 4, 2009
    Publication date: October 21, 2010
    Applicant: MICROVISION, INC.
    Inventors: Alban N. Lescure, Markus Duelli, Mark O. Freeman
  • Patent number: 7773109
    Abstract: A display device for capturing and displaying images along a single optical axis, having an image capture device for capturing the objective image through the display panel when the display device is in a second transmissive state; an image supply source for providing an image to a display panel when the display panel is in a first display state; a mechanism for alternating placing the display panel between the first display state and second transmissive state such that an image can be viewed on the display screen and the object can be captured such that the alternating between the first display state and the second transmissive state is substantially imperceptible to a user of the display panel; and a mechanism for providing digitally image processing for captured images prior to display.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: August 10, 2010
    Assignee: Eastman Kodak Company
    Inventors: John R. Fredlund, Joseph A. Manico, Robert E. Kerbs
  • Patent number: 7532260
    Abstract: A display system includes a display arranged to receive an image wise pattern of light to form an image, including, a pair of conductors, at least one conductor being transparent, a layer of cholesteric liquid crystal material disposed between the conductors, the liquid crystal material having multiple stable optical states at zero electrical field, and a light absorber for forming an image wise thermal pattern in the liquid crystal sufficient to change the optical state of the cholesteric liquid crystal in response to an image wise pattern of light; a display writer, including, a light source for producing a flash of light of sufficient intensity to generate sufficient heat in the light absorber to change the optical state of the cholesteric liquid crystal, a mask located between the light source and the display for defining the image wise pattern of light, a display drive connectable to the conductors for generating an electric field between the conductors for changing the optical state of the cholesteric l
    Type: Grant
    Filed: January 4, 2005
    Date of Patent: May 12, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Stanley W. Stephenson, Xiang-Dong Mi, David M. Johnson
  • Patent number: 7453544
    Abstract: A liquid crystal display device having a high quality able to prevent deterioration etc. of a liquid crystal panel even when a liquid crystal panel used in a light valve of a projector etc. is operated under a high temperature and high humidity environment and a projection type display apparatus using the liquid crystal display device, wherein a liquid crystal layer 16 is sandwiched between a pair of substrates formed by bonding a TFT array substrate 11 and a counter substrate 12 by a sealing material 15 so that they face each other across a predetermined gap, the sealing material 15 contains a nonconductive filler having a mean particle size of less than 0.5 ?m, a liquid crystal material used in the liquid crystal layer 16 is set in its refractive index anisotropy an at room temperature to 0.16 or more, and a cell gap d of an interval between the TFT array substrate 11 and the counter substrate 12 is set at 3 ?m or less.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: November 18, 2008
    Assignee: Sony Corporation
    Inventors: Akiko Toriyama, Hisashi Kadota, Makoto Hashimoto, Hirohide Fukumoto, Hiromi Fukumori
  • Patent number: 7420585
    Abstract: A display device for capturing and displaying images along a single optical axis. The device includes a display panel having a front side and a back side, said display panel capable of being placed in a first display state which allows displaying of an image on said front side for viewing of an image and a second transmissive state wherein said display panel becomes substantially transmissive so as to allow capture of an image of an object positioned in front of said front side of said display panel. An image capture device is provided for capturing said objective image through said display panel when said display device is in the second transmissive state.
    Type: Grant
    Filed: August 4, 2004
    Date of Patent: September 2, 2008
    Assignee: Eastman Kodak Company
    Inventors: John R. Fredlund, Joseph A. Manico, Robert E. Kerbs
  • Patent number: 7126648
    Abstract: Heat generation is inhibited in a polarized light generating optics system in a projector. A liquid crystal projector includes: lens arrays 140, 150 that generate partial light beams from a light beam emitted from a light source; and a polarized light generating optics system 160 that generates polarized light, which is to be supplied to liquid crystal light valves, from the partial light beams. The polarized light generating optics system 160 separates s-polarized light and p-polarized light by polarization separating films 64a. The s-polarized light is reflected from reflecting films 64b and is emitted directly. The p-polarized light is converted into s-polarized light by a selective phase difference plate 66 and is emitted therefrom. The polarized light generating optics system 160 is equipped with light shielding surfaces 62b that shield light from entering into the reflecting films 64b.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: October 24, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Makoto Fuse, Tomiyoshi Ushiyama
  • Patent number: 7126649
    Abstract: Projection systems having o-plate compensation elements are described. The compensation elements may be negative, positive or biaxial anisotropic element and may have a homogeneous tilt or a splayed tilt. The compensation elements may be formed from a polymer liquid crystal. The compensation elements are designed to maximize azimuth-averaged contrast. The compensation elements may be placed on the same side of a liquid crystal panel when a micro-lens array is used to improve the ease of manufacture.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: October 24, 2006
    Assignee: Colorlink, Inc.
    Inventors: Jianmin Chen, Michael G. Robinson, Gary D. Sharp
  • Patent number: 7042486
    Abstract: An image capture and display device includes an electronic motion image camera for capturing the image of a subject located in front of the image display device and a digital projector for projecting the captured image. An optical element provides a common optical axis electronic camera and the digital electronic camera, and a light valve projection screen electronically switchable between a transparent state and a frosted state, is located with respect to the common optical axis for allowing the electronic camera to capture the image of the subject through the projection screen when in the transparent state and for displaying the captured image on the projection screen when in the frosted state.
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: May 9, 2006
    Assignee: Eastman Kodak Company
    Inventors: Joseph A. Manico, Wayne F. Niskala
  • Patent number: 6908646
    Abstract: An anisotropic scattering film, wherein said film has a sea-island structure comprising a matrix phase consisting of at least one polymeric material, and a dispersed phase consisting of at least one polymeric material, wherein the dispersed phase is rod-like, the dispersed phase substantially orientates to one direction, the refractive index of the dispersed phase in the major axis direction differs from the refractive index of the matrix phase in the corresponding direction, the diameter of the dispersed phase is 200 nm or less, and the length of the dispersed phase is 800 nm or more.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: June 21, 2005
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kazunori Akiyoshi, Shigeaki Chika, Koichi Fujisawa
  • Patent number: 6862048
    Abstract: A liquid crystal display panel including first and second substrates, and a FLC layer interposed therebetween. A small quantity of additives are mixed in the FLC layer, without changing the electrical or chemical properties of the FLC. Under a proper temperature and an electric field, the FLC layer is ripened sufficiently. Thereafter, the FLC is exposed to light such that polymer networks are formed in the FLC layer due to the polymerization by the additives. The polymer networks connect with each other across molecular layers in the FLC such that the molecules of the FLC are stabilized in proper orientations and maintain their molecular layer structure regardless of the temperature variance. And, the diffraction grating becomes stable regardless of the temperature variance, and fast response time and good gray scale are achieved.
    Type: Grant
    Filed: November 19, 2003
    Date of Patent: March 1, 2005
    Assignee: LG.Philips LCD Co., Ltd.
    Inventors: Suk-Won Choi, Hyung-Ki Hong
  • Patent number: 6849204
    Abstract: A compound having formula (5) wherein: D5 is an electron donor moiety; C5 is a conjugated bridging moiety; A5 is an electron acceptor moiety; R5 is a spacer moiety; S5 is a hydrocarbon, a heterocyclic moiety, or a hetero-acyclic moiety; and c? is an integer.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: February 1, 2005
    Assignee: Xerox Corporation
    Inventors: Gabriel Iftime, Peter M. Kazmaier
  • Publication number: 20040257483
    Abstract: A liquid crystal display device includes a pair of opposing substrates, a liquid crystal film sandwiched between the opposing substrates, plural electrodes of a first kind disposed on an inner surface of one of the opposing substrates for defining plurality pixels, at least one electrode of a second kind disposed on an inner surface of one of (1) the one of the pair of opposing substrates so as to be adjacent to, but spaced from the plural electrodes of the first kind and (2) another of the opposing substrates so as to face the plural electrodes of the first kind, and at least one spacer disposed approximately at a center of at least one of the plural pixels for establishing a spacing between the opposing substrates. The at least one spacer is fixed to one of the opposing substrates and covered with one of (1) a corresponding one of the plural electrodes of the first kind and (2) a corresponding one of the at least one electrode of the second kind.
    Type: Application
    Filed: July 16, 2004
    Publication date: December 23, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Kazuhiko Yanagawa, Keiichiro Ashizawa, Masahiro Ishii, Masayuki Hikiba
  • Patent number: 6791658
    Abstract: Two electric fields that are directed to respective directions rectangular relative to each other are selectively applied to polymer dispersed liquid crystal by means of electrodes arranged to sandwich the polymer dispersed liquid crystal and electrodes arranged along a substrate to uniformly orient the liquid crystal in either of the directions. While conventional polymer dispersed liquid crystal is adapted to utilize scatter of light in a randomly oriented state, the polymer dispersed liquid crystal of this invention is adapted to utilize a uniformly oriented state to improve the efficiency of scattering light. The present invention is also applicable to devices where polymer dispersed liquid crystal has a memory property.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: September 14, 2004
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoko Maruyama, Yoshinori Uno
  • Patent number: 6781641
    Abstract: A liquid crystal display (LCD) projector in which temperature rise of the polarizing plate is reduced and the liquid crystal display panels and polarizing plates are easily retained in place. In the LCD projector, at least one of the incident light side polarizing plate and the exit light side polarizing plate has a first polarizing plate disposed on the incident light side of a glass substrate and a second polarizing plate disposed on the exit light side of the glass substrate. The first polarizing plate has a low degree of polarization and the second polarizing plate has a high degree of polarization and the polarizing plates are arranged to have their axes of transmission polarization coincident. The temperature rise due to absorption of light is shared by the first and second polarizing plates and this contributes to reduction in size of the projector.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: August 24, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takehiro Okada, Masanari Hashimukai
  • Patent number: 6762801
    Abstract: The invention provides a system for varying the transmittance of light through selected portions of a media on which images are displayed, the system including an image display panel, an image display source for projecting images on the media, LC-based, variable transmittance optical (VTO) media, a light sensor for measuring ambient light, and a signal generator connected to the VTO media for applying voltage to portions of the media at levels determined and controlled by the sensor, whereby the transmittance of light through the portions of the media is varied in accordance with the prevailing ambient light. A method is also provided.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: July 13, 2004
    Assignee: ELOP Electro-Optics Industries Ltd.
    Inventors: Victor Weiss, Uzi Orion
  • Patent number: 6697132
    Abstract: An optical member comprising an optical material or a laminated body of the optical materials in a shape a sheet or a film and an adhesive layer at least on one side thereof, wherein a repulsive force when deformed at 180° in radius of 25 mm with 25 mm width shows 0.2 to 0.8 N, is used in a liquid crystal display. The optical member have a peeling strength may be decreased without decrease in adhesive strength of adhesive itself to enable easy formation of trigger for peeling.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: February 24, 2004
    Assignee: Nitto Denko Corporation
    Inventors: Yuuji Saiki, Masayuki Satake, Yasushi Takahashi, Takashi Shouda
  • Patent number: 6674492
    Abstract: A transparent filter including a sheet-shaped body and numerous linear conductive elements arrayed on a surface thereof, which is adapted to be disposed in front of an image device having rectangular pixels; wherein the conductive elements with a linewidth of 50 &mgr;m or less are arrayed on the sheet-shaped body in two directions with a pitch P1 and a pitch P2, respectively; an aperture ratio of the filter is not less than 70%; and when lengths of a pixel of the image device in the vertical direction Y and in the horizontal direction X are denoted by W1 and W2, respectively, P1, P2, W1 and W2 satisfy a relation expressed by the following Equation (1) and Equation (2), n1+0.35≦W1/P1≦n1+0.65  (1) n2+0.35≦W2/P2≦n2+0.65  (2) The use of the transparent filter can increase the aperture ratio in comparison with that of a conventional mesh, and besides the disposal thereof in front of an image device having rectangular pixels can make the moire inconspicuous.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: January 6, 2004
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Akiyoshi Kogame, Makoto Matsumoto
  • Patent number: 6607280
    Abstract: In a projection apparatus, a light beam emitted by a light source is guided to a modulation element for forming an image. The light beam emerged from the modulation element is projected onto a screen by a projection lens. An image of the light source is formed as a first light source image by a first optical system. The light beam from the modulation element illuminated with light emanating from the first light source image is imaged by a second optical system as a second light source image at a potion in the vicinity of an aperture of a stop of the projection lens. A peripheral portion of the first light source image is intercepted by another stop located at a potion conjugate with the stop of the projection lens.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: August 19, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Koyama, Yoshiaki Kurioka
  • Patent number: 6556181
    Abstract: Provided are a color display driving principle obtained while taking into account a difference in eye sensitivity to the flickering of differently colored lights, a TFT liquid crystal display module structure that is adequate for this method, and a double-panel projection type display device. The count of the G (green) color data that can be written is increased compared with the count for the other primary colors, or the display period for green can be extended. The repetitive unit is set to R, G, B and G, so that a satisfactory refresh rate can be set for the important color G. Therefore, the overall refresh frequency and the power consumed by the display device can be reduced without deterioration of the display quality, and requests for the time response speeds by the display device can be reduced.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: April 29, 2003
    Assignee: International Business Machines Corporation
    Inventors: Fumiaki Yamada, Yoshitami Sakaguchi
  • Patent number: 6414728
    Abstract: A transportable image display system having direct and projection viewing modes of operation. The image display system comprises a spatial light modulation structure for spatially modulating the intensity of light produced from a light source, and light diffusing panel of electro-optical construction having a light scattering state in which light being transmitted therethrough is scattered in a diffusive manner, and a light transmission state in which light being transmitted therethrough is transmitted without substantial scattering. In the illustrative embodiments, the spatial light modulation structure can be an electrically-addressable LCD panel, or slide-film structures to be viewed. During the direct viewing mode, light produced from the light source is scattered by the light diffusing panel and spatial intensity modulated by the spatial light modulation structure to form a first image for direct viewing.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: July 2, 2002
    Assignee: Reveo, Inc.
    Inventors: Sadeg M. Faris, Le Li
  • Patent number: 6365526
    Abstract: An optical illumination system wherein an increased amount of light from a light source can reach a light valve, in which a luminous flux of the light source is irradiated upon a first lens array. The luminous flux having passed through the first lens array is introduced to the polarization conversion system provided immediately before a second lens array, and a luminous flux coming out from the polarization conversion system is introduced to the second lens array and then irradiated upon the light valve. The first lens array has an image forming position f which satisfies S<f<L where L is an optical path length of a longer one of optical paths of P polarized light and S polarized light decomposed from the luminous flux from the light source by the polarization conversion system and S is an optical path length of a shorter one of the optical paths.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: April 2, 2002
    Assignee: Sony Corporation
    Inventors: Tatsuru Kanamori, Kenji Sugihara, Koji Kita, Makoto Shinoda
  • Publication number: 20010035918
    Abstract: A liquid crystal display device and an electro-optical device include substrates facing each other and each having an electrode, the substrates being spaced apart, spacers disposed between the substrates and defining an electro-optical cell together with the substrates, and a colloidal liquid crystal composite (CLCC) formed in the electro-optical cell. The CLCC includes particle-rich inter-domain regions and micro-domains of a mesogenic liquid crystal, and the particle-rich inter-domain regions include colloidal organic particles being networked in the mesogenic liquid crystal.
    Type: Application
    Filed: April 25, 2001
    Publication date: November 1, 2001
    Inventors: Hajime Nakamura, Jason Crain
  • Patent number: 6243152
    Abstract: A polymer dispersed liquid crystal projection display is provided that has enhanced contrast. In the projection system using a polymer dispersed liquid crystal display (PDLC), polarized light is used as the light source onto the PDLC. The reflected light maintains its polarization, while the scattered light from the off pixels of the PDLC randomize the polarization. The polarized image is then passed through a polarizing filter which eliminates half of the scattered light, whereas practically all of the polarized image is passed onto the display source. In this way, the contrast between the on and off pixels is effectively doubled.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: June 5, 2001
    Assignee: Duke University
    Inventors: Richard M. Knox, Mehdi Zeinali
  • Patent number: 6177965
    Abstract: In a display device, counter electrodes are formed in stripes at a position facing pixel electrodes, with a polymer dispersion liquid crystal held between the counter electrodes and pixel electrodes. When a positive-polarity signal is to be impressed to a pixel electrode, a negative-polarity voltage is fed to the counter electrode. On the other hand, when a negative-polarity signal is to be impressed to a pixel electrode, a positive-polarity voltage is added to the counter electrode. In this manner of impression voltages, a high voltage can be applied to the polymer dispersion liquid crystal layer on the pixel electrodes, so that the liquid crystal layer is turned into the transmitting state even if it is thick. Accordingly, the scattering efficiency is improved and images are displayed with high contrast as the liquid crystal layer can be made thick.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: January 23, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Takahara, Hideki Omae
  • Patent number: 6151086
    Abstract: An optical system and projector includes a source of light, an output system having a collection angle for receiving light and passing such received light as an output, and a liquid crystal device including relatively low birefringence liquid crystal material for selectively scattering light through a controlled angle such that a major portion of the scattered light may be collected by said output system, or for transmitting light, the output system including an aperture for transmitting such scattered light and blocking unscattered light. A method of optimizing the angle of scattering of output light in a liquid crystal device which is operable to transmit light or to scatter light to match the entrance pupil of an optical system in order to maximize the amount of collected scattered light, includes selecting the birefringence of the liquid crystal material of about 0.16 or less, and placing the liquid crystal material and medium in physical relation to cause such light scattering or transmission.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: November 21, 2000
    Assignee: Lambent LLC
    Inventor: James L. Fergason
  • Patent number: 6122021
    Abstract: A liquid crystal display element comprises a pair of substrates provided with electrodes and a liquid crystal and solidified matrix composite material, disposed between the pair of substrates, which includes a nematic liquid crystal dispersed and held in a solidified matrix, the nematic liquid crystal being such that the refractive index of the liquid crystal is changed depending on states of applying a voltage wherein in a state, the refractive index of the liquid crystal substantially coincides with that of the solidified matrix to thereby pass light, and in the other state, the former does not coincide with the latter to thereby cause the scattering of light, wherein the refractive index anisotropy .DELTA.n of the liquid crystal used is 0.18 or higher, and the dielectric anisotropy .DELTA..epsilon..sub.LC of the liquid crystal used satisfies the relation of 5<.DELTA..epsilon..sub.LC <13.
    Type: Grant
    Filed: November 30, 1994
    Date of Patent: September 19, 2000
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Yoshinori Hirai, Satoshi Niiyama, Tomoki Gunjima, Masanori Yuki, Masaya Kunigita, Yukio Yoshikawa, Eiji Shidoji
  • Patent number: 6088075
    Abstract: A liquid crystal display device includes a pair of substrates; a liquid crystal layer interposed between the pair of substrates; and an electrode for applying a voltage to the liquid crystal layer. The liquid crystal layer includes a polymer dispersed liquid crystal material having a polymer phase and a liquid crystal phase, and fulfills the conditions represented by: R.multidot..DELTA.n>0.3 and 8R<d where d represents the thickness of the liquid crystal layer in the unit of micrometers, R represents the characteristic length of the liquid crystal phase in the unit of micrometers, and .DELTA.n represents the birefringence of a liquid crystal material forming the liquid crystal phase, and the liquid crystal phase fulfills the conditions represented by: R.multidot..DELTA.n>0.35 and d<1.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: July 11, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenji Nakao, Masao Yamamoto, Tsuyoshi Uemura
  • Patent number: 6088380
    Abstract: A high efficiency, narrow spectral linewidth lasing pixel device that implements a low-voltage spatially patterned variable loss element placed inside an optically pumped high-gain laser cavity is disclosed. The output properties of this system make it useful for digital projection displays.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: July 11, 2000
    Assignee: Spectra Science Corporation
    Inventor: Nabil M Lawandy
  • Patent number: 6049364
    Abstract: A liquid crystal display panel includes a counter substrate having a counter electrode and a multi-layered dielectric film both formed thereon, and an array substrate formed with pixel electrodes and thin-film transistors serving as switching elements. A layer of polymer dispersed liquid crystal material containing a UV-curable resin component and a liquid crystal component is sandwiched and sealed between the counter and array substrates. A light shielding film is formed over each thin-film transistor. The multi-layered dielectric film is a laminated structure of alternating thin-films of SiO.sub.2 and HfO.sub.2. Since the multi-layered dielectric film is of a nature capable of transmitting UV-rays of light therethrough, the UV-curable resin component positioned underneath the multi-layered dielectric film can be cured during the manufacture.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: April 11, 2000
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Takahara, Shinya Sannohe