Patents Assigned to Display Technologies
  • Patent number: 7535441
    Abstract: Display driver circuits are described for driving organic light emitting diode displays, particularly passive matrix displays, with greater efficiency. The display drivers comprise a controllable current generator to provide a variable current drive output to an OLED display, the current generator comprising at least one bipolar transistor in series with the current drive output. The display brightness is adjustable by controlling the current generator to vary the current drive to the display. Preferably the bipolar transistor has an emitter terminal substantially directly connected to a power supply line of the driver to reduce losses in the driver. A corresponding method is also described. By employing a bipolar transistor current drive and varying display brightness by controlling the current an efficient driver-display combination is obtained.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: May 19, 2009
    Assignee: Cambridge Display Technology Limited
    Inventors: Euan C. Smith, Paul R. Routley
  • Patent number: 7532282
    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: Grant
    Filed: May 31, 2005
    Date of Patent: May 12, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Yoshitaka Yamada, Hirokazu Morimoto, Seiichi Sato, Hiroyuki Kimura, Tetsuya Iizuka
  • Patent number: 7531377
    Abstract: A method of forming an optical device comprising the steps of: providing a substrate comprising a first electrode capable of injecting or accepting charge carriers of a first type; forming over the first electrode a first layer that is at least partially insoluble in a solvent by depositing a first semiconducting material that is free of cross-linkable vinyl or ethynyl groups and is, at the time of deposition, soluble in the solvent; forming a second layer in contact with the first layer and comprising a second semiconducting material by depositing a second semiconducting material from a solution in the solvent; and forming over the second layer a second electrode capable of injecting or accepting charge carriers of a second type wherein the first layer is rendered at least partially insoluble by one or more of heat, vacuum and ambient drying treatment following deposition of the first semiconducting material.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: May 12, 2009
    Assignee: Cambridge Display Technology Limited
    Inventors: Craig Edward Murphy, Salvatore Cina, Timothy Butler, Matthew Roberts, Nalinkumar Lallubhai Patel, Clare Louise Foden, Mark Levence Leadbeater, Daniel Alan Forsythe, Robert Sidney Archer, Nicholas de Brissac Baynes, Nathan Luke Phillips, Anil Raj Duggal, Jie Liu
  • Patent number: 7531831
    Abstract: An optical device comprising an anode, a cathode comprising barium, strontium or calcium, and a layer of organic semiconducting material between the anode and the cathode wherein a layer of hole transporting and electron blocking material is located between the anode and the layer of organic semiconducting material.
    Type: Grant
    Filed: March 19, 2004
    Date of Patent: May 12, 2009
    Assignee: Cambridge Display Technology Limited
    Inventors: Brian Tierney, Ilaria Grizzi, Clare Foden, Nalin Patel, Mark Leadbeater
  • Publication number: 20090115318
    Abstract: An organic electronic device structure, the structure comprising: a substrate; a base layer supported by said substrate and defining the base of a well for solvent-based deposition of organic electronic material; one or more spacer layers formed over said base layer; a bank layer formed over said spacer layer to define a side of said well; and wherein an edge of said well adjacent said base layer is undercut to define a shelf over said base layer, said shelf defining a recess to receive said organic electronic material.
    Type: Application
    Filed: August 22, 2006
    Publication date: May 7, 2009
    Applicant: Cambridge Display Technology Limited
    Inventors: Haydn Gregory, Julian Carter
  • Patent number: 7528898
    Abstract: A liquid crystal display apparatus includes a backlight unit including a light guiding plate that includes a light emitting surface, a light source and a back cover that covers the light guiding plate and the light source and has an opening in a region thereof that faces the light emitting surface, a liquid crystal display panel including an array substrate provided to face the light emitting surface, a counter substrate and a liquid crystal layer, a frame-shaped case that covers a peripheral portion of the counter substrate and peripheral walls of the back cover, and an input device provided on the case to face the counter substrate and having an entry surface, wherein the back cover includes a plurality of projecting portions which project even the light emitting surface, face a side edge of the liquid crystal display panel, and support the input device via the case.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: May 5, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Yoshinari Hashimoto
  • Publication number: 20090109142
    Abstract: A switch being turned off using an output open function of a power supply circuit, a cathode voltage Vss is not transmitted, an output terminal takes on a high impedance condition and, a probing being done into a pad of the cathode voltage Vss output terminal with a probe, an ammeter which measures a current is disposed between the probe 304 and an external power source Vsst, making an adjustment time cathode voltage Vsst equal to an image display time cathode voltage Vss.
    Type: Application
    Filed: March 28, 2008
    Publication date: April 30, 2009
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Hiroshi Takahara
  • Patent number: 7525335
    Abstract: An inspection circuit is constructed by first inspection TFTs provided to one end sides of signal lines, and second inspection TFTs provided to the other end sides of the signal lines. By using both the first inspection TFTs and the second inspection TFTs, the driving capability can be secured while miniaturizing the first inspection TFTs and the second inspection TFTs. Therefore, the signal lines can be reliably inspected while saving the space for the inspection circuit.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: April 28, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Hiroshi Ootaguro, Yoshio Iwai, Tetsuya Ohtomo
  • Patent number: 7525531
    Abstract: The present invention is directed to provide, for example, a lighting device and an image display, with which higher luminance and others can be achieved.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: April 28, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Akifumi Ogiwara, Kazunori Komori, Junko Asayama, Yasunori Kuratomi
  • Patent number: 7525613
    Abstract: A liquid crystal display device comprises a liquid crystal display panel including a plurality of pixels are arrayed substantially in a matrix, and a display control circuit which sequentially selects the rows of pixels in synchronism with a horizontal period of a sync signal externally supplied together with a video signal, and drives the pixels of a selected row in accordance with pixel data items obtained from the video signal for each horizontal period. The display control circuit includes a clock generator which generates a reference clock signal of a constant frequency, a period detector which detects a length of the horizontal period as the number of pulses of the reference clock signal, and a drive timing generator which adjusts a row selection period based on the number of pulses detected by the period detector.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: April 28, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Kentaro Teranishi
  • Publication number: 20090101893
    Abstract: A method of forming an organic thin film transistor comprising source and drain electrodes with a channel region therebetween, a gate electrode, a dielectric layer disposed between the source and drain electrodes and the gate electrode, and an organic semiconductor disposed in at least the channel region between the source and drain electrodes, said method comprising: seeding a surface in the channel region with crystallization sites prior to deposition of the organic semiconductor; and depositing the organic semiconductor onto the seeded surface whereby the organic semiconductor crystallizes at the crystallization sites forming crystalline domains in the channel region.
    Type: Application
    Filed: June 20, 2008
    Publication date: April 23, 2009
    Applicants: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED, MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD.
    Inventors: Jonathan J. Halls, Craig Murphy, Gregory Whiting, Sadayoshi Hotta
  • Patent number: 7522149
    Abstract: A liquid crystal display apparatus according to the present invention includes a pixel array unit 1 having signal lines and scanning lines respectively arranged side by side, a signal line drive circuit 2 which drives the signal lines, a scanning line drive circuit 3 which drives the scanning lines, a signal processing output circuit 4 which serially outputs the picked-up image data supplied from the sensors, and a sync signal generation circuit 5. A black-white change obtained in the picked-up image data when a finger is brought close to or brought into contact with the pixel array unit 1 is detected, and the coordinate position of the finger is identified taking the ambient brightness into consideration. Regardless of whether the surroundings are bright or dark, therefore, the coordinate position can be detected with high precision.
    Type: Grant
    Filed: March 29, 2004
    Date of Patent: April 21, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Takashi Nakamura, Masahiro Yoshida, Hirotaka Hayashi, Miyuki Ishikawa, Yasuharu Tanaka
  • Patent number: 7521268
    Abstract: Provided is a method of manufacturing a display which includes an insulating substrate and a structure formed on the insulating substrate and including a display element, including forming a patterned layer as a portion of the structure on the insulating substrate by vapor deposition in vacuum using a mask, and cooling the insulating substrate before and/or during formation of the patterned layer by arranging a cooling plate which comprises a metal substrate and an infrared absorption layer covering a main surface of the metal substrate and being larger in infrared absorptance than the metal plate such that the infrared absorption layer faces the insulating substrate.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: April 21, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Motonobu Aoki, Tetsuo Ishida
  • Patent number: 7521858
    Abstract: An organic EL display includes a substrate, and organic EL elements arranged on the substrate. Each organic EL element includes an anode, a cathode, an emitting layer made of an organic material and interposed therebetween, and a hole transporting layer made of an organic material and interposed between the emitting layer and the anode. The hole transporting layer includes a first layer and a second layer facing the substrate with the first layer interposed therebetween. The second layer is equal in compositions with the first layer and different in degrees of crystallinity from the first layer.
    Type: Grant
    Filed: November 22, 2006
    Date of Patent: April 21, 2009
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Hirofumi Kubota, Norihisa Maeda, Masuyuki Oota, Kenji Mitsui
  • Publication number: 20090096363
    Abstract: An electroluminescent device comprising: a first charge carrier injecting layer for injecting positive charge carriers; a second charge carrier injecting layer for injecting negative charge carriers; and a light-emissive layer located between the charge carrier injecting layers and comprising a mixture of: a first component for accepting positive charge carriers from the first charge carrier injecting layer; a second component for accepting negative charge carriers from the second charge carrier injecting layer; and a third, organic light-emissive component for generating light as a result of combination of charge carriers from the first and second components; at least one of the first, second and third components forming a type II semiconductor interface with another of the first, second and third components.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 16, 2009
    Applicant: Cambridge Display Technology Ltd.
    Inventors: Jeremy Henley Burroughes, Richard Henry Friend, Christopher John Bright, David John Lacey, Peter Devine
  • Patent number: 7518521
    Abstract: An anti-theft security tag includes an engagement member and a housing for supporting an electronic article surveillance (EAS) marker. The housing includes a rotating inner core for supporting the engagement member for attachment to the article. The engagement member includes a line for connection to the article and a locking mechanism for securing the first and second ends of the line therein so that the core and the engagement member can rotate together within the housing. In one embodiment, the locking mechanism includes one or more self-crimping members which automatically secure at least one end of the line upon insertion therein. One end of the rotating core may be disposed flush with one end of the housing, so that the consumer cannot twist the line in order to remove the tag.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: April 14, 2009
    Assignee: Display Technologies, Inc.
    Inventors: Jeffrey A Feibelman, Norman Thibaudeau, William Duarte, David Miller
  • Publication number: 20090091559
    Abstract: Display driver circuits are described for driving organic light emitting diode displays, particularly passive matrix displays with greater efficiency. Display driver control circuitry (506) comprises a frame memory interface (505) for reading data from a frame memory (504) for presentation on a passive matrix OLED display. A blank line identifier (507) identifies one or more substantially blank rows of pixels define by the data in the frame memory and the control circuitry (506) skips past these rows when the passive matrix display is addressed. When blank lines are skipped the apparent brightness of the remaining lines increases and thus preferably the control circuitry includes a power controller (505) for reducing a power supply to the display in proportion to the number of skipped lines. The invention is particularly suited to a display driver providing a controlled current drive.
    Type: Application
    Filed: December 12, 2008
    Publication date: April 9, 2009
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Euan C. Smith, Paul R. Routley, William Goodchild
  • Patent number: 7514866
    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: February 6, 2006
    Date of Patent: April 7, 2009
    Assignee: Cambridge Display Technology Limited
    Inventors: Jeremy Henley Burroughes, Peter Devine
  • Publication number: 20090086153
    Abstract: Shield patterns which are formed in a liquid crystal cell region on a substrate for an array substrate, disposed along a border with another adjacent liquid crystal cell region, outside a predetermined control wiring pattern, and are for shielding the liquid crystal cell region, and a connecting wiring line connecting the shield patterns opposed to each other across a border to which at least a pair of liquid crystal cell regions adjacent to each other are adjacent are included.
    Type: Application
    Filed: February 18, 2008
    Publication date: April 2, 2009
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Kazunori Hayakawa, Yasuhiro Yamamoto, Kenichi Goshoo
  • Patent number: 7510885
    Abstract: A method of preparing a plurality of electrically connected organic optoelectronic devices on a substrate comprising firstly preparing a plurality of organic optoelectronic devices on a substrate, by the steps of providing a patterned layer of a first conductive material over the substrate, providing layer of organic optoelectronic material over the layer of first conductive material and providing a patterned layer of a second conductive material over the layer of organic optoelectronic material, at least partially removing regions of the organic optoelectronic material which are not covered by the patterned layer of second conductive material and secondly providing electrical connections to electrically connect at least two of the plurality of organic optoelectronic devices. The organic optoelectronic devices are suitably organic photovoltaic devices or organic electroluminescent devices.
    Type: Grant
    Filed: December 18, 2003
    Date of Patent: March 31, 2009
    Assignee: Cambridge Display Technology Limited
    Inventors: Jonathan Halls, Richard Wilson