Patents Assigned to Display Technologies
  • Patent number: 7255939
    Abstract: An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a first electrode layer having a high resistance adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, said first electrode layer comprising a high-resistance material selected from the group consisting of a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material with a conductor material.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: August 14, 2007
    Assignee: Cambridge Display Technology Ltd.
    Inventors: Julian Charles Carter, Jeremy Henley Burroughes, Stephen Karl Heeks
  • Patent number: 7256757
    Abstract: An organic EL display panel includes a substrate, pixel electrodes, a common electrode, signal lines, power supply lines, thin-film transistors, scan lines, organic EL elements and storage capacitors. To obtain a full color image by light emissions of the organic EL elements, red, green and blue emitters are patterned correspondently with the pixel electrodes and arranged in this order along the gate line direction. The emitters are patterned such that each pair of the red, green and blue emitters which are adjacent to each other along the gate line direction overlap each other to define a light-emitting layer overlap region, where colors of light components which exit the organic EL elements and pass through the emitters are mixed, between the adjacent organic EL elements arranged along the gate line direction. At least one of the thin-film transistor and the storage capacitor is arranged in the light-emitting layer overlap region.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: August 14, 2007
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Yutaka Nanno, Hiroshi Tsutsu
  • Patent number: 7256844
    Abstract: A semi-transmission type liquid crystal display device includes a liquid crystal display panel LPN in which a liquid crystal layer LQ is held between an array substrate AR and a counter-substrate CT that are disposed to face each other, a first polarization control element POL1 provided on an outer surface of the array substrate AR, which is opposed to a surface of the array substrate AR that holds the liquid crystal layer LQ, and a second polarization control element POL2 provided on an outer surface of the counter-substrate CT, which is opposed to a surface of the counter-substrate CT that holds the liquid crystal layer LQ. The first polarization control element POL1 and second polarization control element POL2 control a polarization state of light that passes therethrough, such that light in a polarization state of elliptically polarized light is to be incident on the liquid crystal layer LQ.
    Type: Grant
    Filed: November 12, 2004
    Date of Patent: August 14, 2007
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Kazuhiro Joten
  • Publication number: 20070182893
    Abstract: In order to achieve high display quality level in both of the reflective and transmissive regions without providing steps in the liquid crystal layer, in the reflective region for display with light reflected from a metallic auxiliary capacitance line, a part of a transparent pixel electrode overlaps the auxiliary capacitance line. An electric field generated between the pixel electrode and the counter electrode inclines liquid crystal molecules in the liquid crystal layer in a region where the pixel electrode overlaps the auxiliary capacitance line, and an oblique electric field generated between an end portion of the pixel electrode and the counter electrode inclines liquid crystal molecules in the liquid crystal layer in a region where the pixel electrode does not overlap the auxiliary capacitance line. Thereby, the phase differences in light passing through the reflective region is close to that in light passing through the transmissive region.
    Type: Application
    Filed: January 29, 2007
    Publication date: August 9, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Norihiro YOSHIDA, Jin HIROSAWA, Arihiro TAKEDA
  • Publication number: 20070182723
    Abstract: A display device includes a plurality of scan lines and each of a plurality of signal lines which are provided intersecting to each other; a plurality of display sections each disposed at an intersection of each of the plurality of scan lines and each of the plurality of signal lines; and a plurality of photo receivers each provided corresponding to each of the plural display sections so that the number of the disposed photo receivers would monotonically increase as the sizes of the photo receivers increase.
    Type: Application
    Filed: January 17, 2007
    Publication date: August 9, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Takayuki Imai, Takashi Nakamura, Hirotaka Hayashi, Norio Tada, Hiroki Nakamura, Miyuki Ishikawa, Masahiro Yoshida
  • Publication number: 20070182324
    Abstract: An organic optoelectrical device comprising: a substrate; at least one first electrode disposed over the substrate; a layer of bank material disposed over the first electrode and defining a plurality of wells; a layer of organic semi-conductive material disposed in the wells; at least one second electrode disposed over the layer of organic semi-conductive material in the wells; an encapsulant disposed over the at least one second electrode; a layer of the bank material provided at a periphery of the device; and a metallic seal adhering the encapsulant to the layer of bank material at the periphery of the device, the bank material being an inorganic electrically insulating material whereby the substrate, the bank material, the metallic seal and the encapsulant form a seal at the periphery of the device.
    Type: Application
    Filed: November 13, 2006
    Publication date: August 9, 2007
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventors: Martin Richardson, Haydn Gregory
  • Publication number: 20070182888
    Abstract: A projection pattern is formed so as to project to a colored film to which a part of colored film on an array substrate is adjacent. A recess pattern corresponding to the projection pattern is formed to the adjacent colored film. A columnar spacer is formed on the projection pattern. The columnar spacer does not override a color overlap portion of the colored films, and thus the variation in a cell gap between the array substrate and the counter substrate can be suppressed.
    Type: Application
    Filed: January 24, 2007
    Publication date: August 9, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Hiroharu INOUE, Takeshi Yamamoto, Atsuyuki Manabe
  • Publication number: 20070176882
    Abstract: The OCB mode liquid crystal display device applies a black display voltage V(Tr) with temperature characteristic requirements expressed by: V(T)=<Vs(T), and V(Tr??T)=V(T)=<Vs(Tr), where T represents a panel temperature of the liquid crystal panel, Tr represents a sensed temperature, ?T represents a temperature difference between the panel temperature and the sensed temperature, and Vs(T) represents an optimal black display voltage.
    Type: Application
    Filed: January 31, 2007
    Publication date: August 2, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Shigesumi ARAKI, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki
  • Patent number: 7250929
    Abstract: An active-type display device includes a plurality of video signal lines that are formed on a substrate, a plurality of pixels that are connected to the video signal lines and are operated by current signals, and a video signal driver that supplies video currents to the pixels via the video signal lines on the basis of data signals that are supplied from an external circuit. The video signal driver includes a plurality of DA units that sum up at least one of a plurality of gray-level reference currents, which are stored in constant current memory circuits, on the basis of the data signals, thereby executing conversion to the video current.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: July 31, 2007
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Masuyuki Ota
  • Patent number: 7248245
    Abstract: A liquid crystal display device includes a liquid crystal display panel having a first substrate, a second substrate, a liquid crystal disposed between the first substrate and the second substrate, plural pixel electrodes arranged in a matrix on a second substrate, a counter electrode provided on one of first substrate and the second substrate and plural switching elements connected to the respective plural pixel electrodes, a display drive control unit for driving the liquid crystal disposed between each of the pixel electrodes and the counter electrode, a lighting unit having LEDs emitting light of respective red, green and blue colors, and a lighting device control unit for making each LED of color perform time-division light emission in synchronization with the switching of each of the switching elements.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: July 24, 2007
    Assignee: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Katsumi Adachi, Hiroyuki Handa
  • Publication number: 20070164951
    Abstract: A driving circuit of a liquid crystal panel is provided to a glass substrate. A power supply IC for supplying power to the driving circuit is mounted on FPC for electrically connecting the liquid crystal panel and an image output IC at the outside of the liquid crystal panel. The liquid crystal panel can be driven by the driving circuit on the glass substrate without use of a relatively expensive driver IC for driving the liquid crystal panel, and thus the manufacturing cost can be suppressed. By providing the power supply IC on FPC, the precision of the power supply IC can be enhanced, and the display quality of the liquid crystal panel can be secured.
    Type: Application
    Filed: January 5, 2007
    Publication date: July 19, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd
    Inventor: Koji KURITA
  • Publication number: 20070164956
    Abstract: It is possible to eliminate the blue tone in the black color display in the OCB liquid crystal display device. A liquid crystal display cell (110) includes an opposing substrate (130) having an opposing electrode (Ecom), an array substrate (120) having pixel electrodes of the respective colors (dpixR, dpixG, dpixB), a liquid crystal layer (140) arranged in a bend-arrangement and sandwiched between the opposing substrate (130) and the array substrate (120), and red, green, and blue filter layers (CF(R), CF(G), CF(B)) arranged on one of the substrates. The maximum voltage is applied when performing black color display on the display screen. At least the maximum voltage of the pixel electrode for blue color dpixB applied to the opposing electrode (Ecom) is made different from the maximum voltage of the pixel electrodes of the other colors applied to the opposing electrode (Ecom).
    Type: Application
    Filed: December 8, 2004
    Publication date: July 19, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Shigesumi Araki, Kazuhiro Nishiyama, Mitsutaka Okita, Daiichi Suzuki
  • Publication number: 20070164966
    Abstract: In an embodiment of the invention for an OCB (Optically Compensated Bend)-mode liquid-crystal display (LCD) device, retardation and/or a predetermined voltage range, from which a voltage applied to pixels in a viewing area is selected, is set for the each pixel or for the pixels in each region of the viewing area such that: the luminance on each pixel monotonously increases or decreases with increase of voltage in the predetermined voltage range; the luminance in central portion of the viewing area becomes minimum at black displaying.
    Type: Application
    Filed: December 27, 2006
    Publication date: July 19, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Mitsutaka Okita, Kazuhiro Nishiyama, Daiichi Suzuki, Shigesumi Araki
  • Publication number: 20070165153
    Abstract: A main liquid crystal display panel is attached to a frame, and a sub liquid crystal display panel is attached to a bezel. The frame and the bezel are assembled to each other so that the main liquid crystal display panel and the sub liquid crystal display panel are arranged and held so as to face opposite sides. The frame and the bezel are separated from each other, whereby each of the liquid crystal display panels and can be easily separated at every part of the frame and the bezel.
    Type: Application
    Filed: January 5, 2007
    Publication date: July 19, 2007
    Applicant: Toshiba Matsushita Display Technology CO., LTD.
    Inventors: Shunichiro HAYASHI, Atsushi Hirota
  • Patent number: 7243800
    Abstract: A display package which supports an ornamental object therein, and a sleeve including a pair of side tabs which are insertable into the interior of the box in order to removably secure the sleeve to the box is disclosed. The sleeve allows for viewing the ornamental object supported within the box, and is removable from the box in a manner which discourages theft, but is easy to assemble.
    Type: Grant
    Filed: July 2, 2004
    Date of Patent: July 17, 2007
    Assignee: Display Technologies, Inc.
    Inventor: Jeffrey A. Feibelman
  • Publication number: 20070159436
    Abstract: A liquid-crystal display device of OCB mode, comprising: signal and scanning lines arranged on an insulator substrate as the signal lines are intersected by the scanning lines to form intersections; pixel-dot TFTs arranged respectively in vicinity of the intersections and connected respectively with pixel electrodes, with the signal lines and with the scanning lines; and a repair-use construction for each pixel dot, which is convertible to a diode electrically connecting one of the pixel electrodes on the each pixel dot, to one of the signal lines.
    Type: Application
    Filed: January 5, 2007
    Publication date: July 12, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventors: Tetsuo Fukami, Kenji Nakao
  • Publication number: 20070159431
    Abstract: In order to prevent the reproducibility of a display image from degrading due to the characteristic of a liquid crystal, a liquid crystal display device includes: a liquid crystal panel; a gray scale value generation unit which generates, based on a first gray scale value, a second gray scale value with a gray scale number smaller than the gray scale number of the first gray scale value; and a brightness control unit which sequentially controls the brightness of a corresponding liquid crystal pixel based on the second gray scale value generated by the gray scale value generation unit in a case where the first gray scale value is within a predetermined range, and which controls the brightness of the corresponding liquid crystal pixel based on the first gray scale value in a case where the first gray scale value is out of the predetermined range.
    Type: Application
    Filed: December 14, 2006
    Publication date: July 12, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd.
    Inventor: Koji SHIGEHIRO
  • Publication number: 20070154736
    Abstract: A polymer blend comprising a first, light-emissive polymer comprising substituted or non-substituted units according to formulae (I) and (II) and a second, hole transport polymer comprising substituted or non-substituted fluorene units according to formula (I) and substituted or non-substituted triarylamine units, wherein the molecular weights of the first and second polymers and the blending ratio of the first and second polymers are selected such that, in use in a light-emissive device, the luminance of the emitted light at a bias of 5V is no less than 20,000 cd/m2. wherein R? is independently in each occurrence H, C1-C20 hydrocarbyl or C1-C20 hydrocarbyl containing one or more S, N, O, P or Si atoms, C4-C16 hydrocarbyl carbonyloxy, C4-C16 aryl(trialkylsiloxy) or both R? may form together with the 9-carbon on the fluorene ring a C5-C20 cycloaliphatic structure containing one or more heteroatoms of S, N or O.
    Type: Application
    Filed: November 9, 2006
    Publication date: July 5, 2007
    Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITED
    Inventor: Salvatore Cina
  • Publication number: 20070152934
    Abstract: An organic EL has a problem of element life. Causes of the element life include a temperature and an amount of current. As for a display using an organic EL element, light is emitted by using a current so that an amount of light emission of a screen is proportional to the amount of current passing through a device. Therefore, there are problems that an image of a large amount of light emission has a large current passing through the device causing deterioration of the element and that a high-capacity power supply is required in order to pass a maximum amount of current. As for the display using an organic EL element, the amount of light emission of the screen is proportional to the amount of current passing through the device. Therefore, the higher a maximum amount of light emission of the element is set, the larger the current becomes when all the elements of the screen emit maximum light. If the maximum amount of light emission of the element is suppressed, the entire screen becomes darker.
    Type: Application
    Filed: August 3, 2004
    Publication date: July 5, 2007
    Applicant: Toshiba Matsushita Display Technology Co., Ltd
    Inventor: Tomoyuki Maeda
  • Patent number: 7239309
    Abstract: Display driver circuitry for electro-optic displays, in particular active matrix displays using organic light emitting diodes. The circuitry includes a driver to drive an electro-optic display element in accordance with a drive voltage, a photosensitive device optically coupled to the electro-optic display element to pass a current dependent upon illumination reaching photosensitive device, a control circuit having a control line coupled to the driver to control the brightness of the electro-optic display element and having a current sense input coupled to the photosensitive device, a current set line for coupling to a reference current generator, and a display element select line to, when active, cause the control circuit to drive the electro-optic display element in accordance with the current set by the reference current generator. The circuit provides improved control of an electro-display element such as an organic LED pixel.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: July 3, 2007
    Assignee: Cambridge Display Technology Limited
    Inventors: Euan C. Smith, Paul R. Routley