Patents Assigned to Display Technologies
  • Publication number: 20060038766
    Abstract: In a driver circuit of a display device, an electric potential difference between high-level power supply voltage VDD and low-level power supply voltage VSS2 in shift resistors and buffers is set smaller than an electric potential difference between high-level voltage VDD and low-level voltage VSS of enable signals OE in order to prevent increase in voltage stress on each transistor and concurrently to make larger an electric potential difference between high-level voltage and low-level voltage of output signals.
    Type: Application
    Filed: July 12, 2005
    Publication date: February 23, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Tetsuo Morita
  • Patent number: 6998181
    Abstract: A polymer including a region having a conjugated backbone capable of transporting negative charge carriers, which region includes a plurality of repeat units each including a core group which includes an [Ar?] group substituted with at least one pendant group X and the [Ar?] groups form at least a part of the backbone, wherein each Ar? includes an aromatic or heteroaromatic group and each X includes NAr2 in which each Ar is the same or different and independently includes a substituted or unsubstituted aromatic or heteroaromatic group and N is conjugated with the backbone.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: February 14, 2006
    Assignee: Cambridge Display Technology Limited
    Inventors: Richard O'Dell, Carl Robert Towns, Mary Joyce McKiernan
  • Patent number: 6994906
    Abstract: A transparent or substantially transparent formable and/or flexible component for use as an outer protective element in an electronic or opto electronic device including at least one electrically active organic layer, which component is a composite structure comprising a layer of glass of a thickness less than or equal to 200 microns and a layer of plastic.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: February 7, 2006
    Assignee: Cambridge Display Technology Ltd.
    Inventors: Jeremy Henley Burroughes, Peter Devine
  • Patent number: 6995824
    Abstract: A liquid crystal display device includes a liquid crystal panel, a polarizer plate that is disposed on an observer side, relative to the liquid crystal panel, a polarizer plate that is disposed to be opposed to the polarizer plate, with the liquid crystal panel interposed, and an optical film that is disposed between the polarizer plate and the liquid crystal panel and between the polarizer plate and the liquid crystal panel, thereby to increase a viewing angle of an image that is displayed by the liquid crystal panel, wherein a twist angle of the liquid crystal molecules sealed in the liquid crystal panel is greater than 90° and not greater than 96°, a retardation ?nd of the liquid crystal panel is between 400 nanometers (nm) and 430 nm, and a retardation ?nd of the optical film is between 110 nm and 120 nm.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: February 7, 2006
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Kazuhiro Joten
  • Patent number: 6992438
    Abstract: An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a compound of a group 1 metal, group 2 metal, or a transition metal, a second layer comprising a material having a work function below 3.5 eV, and a third layer spaced from the opto-electrically active region by the first and second layers and having a work function above 3.5 eV.
    Type: Grant
    Filed: March 15, 2004
    Date of Patent: January 31, 2006
    Assignee: Cambridge Display Technology Limited
    Inventors: Jeremy H. Burroughes, Julian C. Carter, Alec G. Gunner, Stephen K. Heeks, Ian S. Millard
  • Publication number: 20060017871
    Abstract: A liquid crystal display (1) includes an array substrate (11), a liquid crystal layer (12), and a counter substrate (13). The array substrate has optical sensors (1112) to detect light from an object presented in front of the array substrate. The counter electrode has a color filter (132) to transmit light emitted from a light source (14), a transparent electrode (134a) that faces a first plurality of pixel electrodes (113) and transmits the light transmitted through the color filter, and a reflective electrode (135) that faces a second plurality of pixel electrodes (113) and reflects external light. The light from the object to be detected is directly given to the optical sensors, which can therefore correctly detect the object. The light emitted from the light source and transmitted through the transparent electrode and the external light reflected from the reflective electrode realize transmissive display and reflective display.
    Type: Application
    Filed: July 8, 2005
    Publication date: January 26, 2006
    Applicant: TOSHIBA MATSUSHITA DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Hirokazu Morimoto, Masaki Kinoshita
  • Publication number: 20060017866
    Abstract: In a liquid crystal display device including not only a color display screen but also a monochrome display screen, blue color layers are partially formed in each area corresponding to each reflective electrode in an auxiliary screen for monochrome display in order to suppress yellowing of the monochrome display screen caused by wavelength dispersion characteristics of liquid crystal. The blue color layers are formed, for example, in a random pattern such as a dot pattern.
    Type: Application
    Filed: July 7, 2005
    Publication date: January 26, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Hirokazu Morimoto, Keiji Tago
  • Patent number: 6989811
    Abstract: A driving circuit of a liquid crystal display device includes driver output lines connected to outputs of a data line driver, m pieces of block selection signal lines for sequentially selecting m pieces of blocks, and data lines for supplying data to a display area. A switch sequentially connects an ith driver output line to ith, i+2jth, . . . , and i+2jx(m?1)th data lines in response to signals on the m pieces of block selection signal lines when j is a positive integer smaller than m.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: January 24, 2006
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Hiromi Enomoto, Hongyong Zhang, Tsutomu Kai, Masanori Nakamura, Susumu Okazaki
  • Patent number: 6989808
    Abstract: A liquid crystal display device includes a d.c. voltage source for producing a common voltage such that the common voltage is substantially equal to a central voltage of a bipolar voltage signal.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: January 24, 2006
    Assignee: Fujitsu Display Technologies Corporation
    Inventors: Kazutaka Hanaoka, Yuichi Inoue, Seiji Tanuma, Makoto Ohashi
  • Publication number: 20060007084
    Abstract: The liquid crystal display device includes a liquid crystal display panel provided with source signal lines and gate signal lines arranged in matrix form and liquid crystal display elements using OCB mode liquid crystal provided at intersections between the source signal lines and gate signal lines, a gate driver which supplies a gate signal to the gate signal lines and a source driver which supplies a voltage corresponding to gradation of the display data to the source signal lines during a display period and supplies a voltage to prevent counter-transfer to the source signal lines during a counter-transfer prevention drive period, and the source driver supplies a voltage lower by a predetermined value than the voltage corresponding to the black color as the voltage to prevent counter-transfer.
    Type: Application
    Filed: March 31, 2005
    Publication date: January 12, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd
    Inventors: Masahiko Takeoka, Seiji Kawaguchi
  • Publication number: 20060007096
    Abstract: A liquid-crystal-panel drive, driving method and its program, and a medium capable of preventing unevenness on a display face from occurring after turning off a power supply in a liquid crystal display apparatus using OCB mode liquid crystal. A liquid crystal display apparatus has a liquid crystal layer using OCB mode liquid crystal, a driver applying a voltage to the liquid crystal layer, a liquid-crystal driving power supply supplying power to the driver, and a switch outputting an on/off signal to the driver. When the switch outputs an off signal, the driver applies a predetermined voltage that can be applied to each pixel of the liquid crystal layer for a predetermined time, and after the elapse of the predetermined time, stops the supply of power to the driver from the liquid-crystal driving power supply.
    Type: Application
    Filed: January 7, 2004
    Publication date: January 12, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd
    Inventors: Seiji Kawaguchi, Kenji Nakao
  • Publication number: 20060007209
    Abstract: [Object]To provide a liquid-crystal display using liquid crystal having splay alignment and bend alignment, which prevents irregularity of a display screen after power off and quickly transfers the liquid-crystal layer of a liquid-crystal panel to bend alignment. [Solving Means] A liquid-crystal panel drive 100 including an output system 102 of selectively outputting one voltage from a video signal voltage Vcom, a reset voltage Vsc, and transfer voltage of transferring the liquid-crystal panel from splay alignment to bend alignment, and control means 103, wherein the reset voltage is applied before applying the video signal voltage Vcom in the power-on state and thereafter the transfer voltage is applied, the transfer voltage is applied to the liquid-crystal panel in the power-off state, and then the reset voltage is applied and thereafter supply of a voltage to the liquid-crystal panel is stopped.
    Type: Application
    Filed: April 15, 2005
    Publication date: January 12, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Tetsuya Nakamura, Seiji Kawaguchi
  • Publication number: 20060007207
    Abstract: A liquid crystal display device includes a liquid crystal display panel having source signal lines and gate signal lines arranged in matrix form and liquid crystal display elements using OCB mode liquid crystal, the liquid crystal display elements being provided at intersections between the source signal lines and gate signal lines; a gate driver that supplies a gate signal to said gate signal lines; a source driver that supplies a voltage corresponding to gradation of display data to said source signal lines during a display period; temperature detection means of detecting temperature; and correcting means of correcting display data for generating the source signal to display data according to the detected temperature, wherein the source signal is generated based on the corrected display data.
    Type: Application
    Filed: March 31, 2005
    Publication date: January 12, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Seiji Kawaguchi
  • Publication number: 20060007224
    Abstract: In order to allow information input using light in both the cases of strong outside light and weak outside light, two or more types of light-sensing elements having different optical sensitivities are arranged in a picture element region. For example, there are alternately arranged rows having arranged therein picture elements 21 provided with low-sensitivity light-sensing elements, and rows having arranged therein picture elements 22 provided with high-sensitivity light-sensing elements. This constitution makes it possible to perform optical information input using the high-sensitivity light-sensing elements in the case of weak outside light, and to perform optical information input using the low-sensitivity light-sensing elements in the case of strong outside light.
    Type: Application
    Filed: May 5, 2005
    Publication date: January 12, 2006
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Hirotaka Hayashi, Takashi Nakamura, Miyuki Ishikawa
  • Patent number: 6983544
    Abstract: A rectangular transparent sheet 15 is printed with black dotted density patterns 21 and 22. Each dot of the patterns 21 and 22 is 30 ?m in size while dotted area occupied rates of the patterns 21 and 22 range from 3% to 45%. The density patterns 21 and 22 are used for density level assessment of unevenness on a flat panel display device as standard references. Such density level assessment is carried out by comparing the unevenness with the patterns 21 and 22 or by visual inspection with the latter placed on the former.
    Type: Grant
    Filed: September 22, 2003
    Date of Patent: January 10, 2006
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Kiyoyuki Echizenya
  • Publication number: 20050280757
    Abstract: In order to reduce the number of processes for manufacturing spacers and to prevent quality degradation resulting from a cell gap, a spacer 115 in a semi-transmission area 12 is formed outside of a region of a bump layer 118B. Thus, it is made possible to manufacture the spacer in the transmission region 11 and the spacer outside of the region of the bump layer in the same process. Accordingly, the number of processes can be reduced. Moreover, it is made possible to determine the cell gap in the semi-transmission area 12 by a single element of a spacer. Accordingly, precision degradation of the cell gap, which results from the bump layer, can be prevented, and high display quality can be obtained.
    Type: Application
    Filed: May 31, 2005
    Publication date: December 22, 2005
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Yoshitaka Yamada, Hirokazu Morimoto, Seiichi Sato, Hiroyuki Kimura, Tetsuya Iizuka
  • Publication number: 20050282983
    Abstract: Optical devices fabricated from solvent processible polymers suffer from susceptibility to solvents and morphological changes. A semiconductive polymer capable of luminescence in an optical device is provided. The polymer comprises a luminescent film-forming solvent processible polymer which contains cross-linking so as to increase its molar mass and to resist solvent dissolution, the cross-linking being such that the polymer retains semiconductive and luminescent properties.
    Type: Application
    Filed: July 18, 2005
    Publication date: December 22, 2005
    Applicant: Cambridge Display Technology Ltd.
    Inventors: Andrew Holmes, Xiao-Chang Li, Stephen Moratti, Kenneth Murray, Richard Friend
  • Patent number: 6977704
    Abstract: The invention relates to a liquid crystal display based on an MVA mode of multi-division alignment in which alignment states of liquid crystal molecules having a negative dielectric anisotropy are made different from each other, and provides a liquid crystal display in which a drop in transmittance is suppressed and response characteristics are improved.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: December 20, 2005
    Assignee: Fujitsu Display Technologies Corporation
    Inventor: Shingo Kataoka
  • Publication number: 20050276072
    Abstract: The invention relates to a backlight unit for liquid crystal displays, etc.; and its object is to provide a backlight unit not involving the problem that the emitted light leaks out of the optical waveguide, even when the space around the cold-cathode tubes in the light source unit for it is filled with a liquid of which the refractive index is nearly the same as that of the glass material that forms the outer wall of the cold-cathode tubes. The backlight unit comprises a housing 6 which houses cold-cathode tubes 2, 4 therein and of which the inner surface is coated with a light reflector 10; a transparent liquid filled in the housing 6; and an optical waveguide 1 made of a transparent substance and having a light-emitting surface S.
    Type: Application
    Filed: October 1, 2003
    Publication date: December 15, 2005
    Applicant: FUJITSU DISPLAY TECHNOLOGIES CORPORATION
    Inventors: Keiji Hayashi, Takeshi Gotoh, Toshihiro Suzuki, Hisashi Yamaguchi, Tetsuya Kobayashi, Tetsuya Hamada, Mari Sugawara
  • Publication number: 20050275770
    Abstract: Counter substrate (color filter substrate) 2 is provided with light-shielding-layer pattern 22 to cover thin-film-transistors 13 in display region 5 and light-shielding-layer pattern 23 at edge portion out of display region to prevent light from leaking from display region 5. Inspection is not carried out to detect defects 21 of light-shielding-layer pattern 23 when counter substrate 2 is assembled, or done to detect them but counter substrate 2 is used in assembling a liquid crystal display device without repair. After defects 21 are detected and their positions are identified, laser light is irradiated to defects 21 on the condition that the liquid crystal display device is kept assembled. Such irradiation of the laser light disturbs alignment of alignment film 25 in portions corresponding to defects 21 in order to prevent the leakage of light from defects.
    Type: Application
    Filed: June 9, 2005
    Publication date: December 15, 2005
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Tomohiro Kubota, Motoyuki Kitabata