Patents Assigned to Display Technologies
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Publication number: 20100264408Abstract: A method of manufacturing an organic thin film transistor, comprising: providing a substrate comprising source and drain electrodes defining a channel region; forming a patterned layer of insulting material defining a well surrounding the channel region; depositing a protective layer in the well; subjecting exposed portions of the patterned layer of insulating material to a de-wetting treatment to lower the wettability of the exposed portions; removing the protective layer; and depositing organic semiconductive material from solution into the well.Type: ApplicationFiled: November 18, 2008Publication date: October 21, 2010Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LTD.Inventors: Mark Bale, Michael Hatcher
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Patent number: 7817119Abstract: A display area composed of matrix-arrayed pixels includes partition walls which separate the pixels, a first electrode which is disposed in an independent insular shape in association with each of the pixels, an organic active layer which is disposed on the first electrode, and a second electrode which is common to all the pixels and is so disposed as to cover the organic active layer of each of the pixels and to expose parts of the partition walls.Type: GrantFiled: May 25, 2007Date of Patent: October 19, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Muneharu Akiyoshi
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Patent number: 7817233Abstract: 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: GrantFiled: December 27, 2006Date of Patent: October 19, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Mitsutaka Okita, Kazuhiro Nishiyama, Daiichi Suzuki, Shigesumi Araki
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Patent number: 7817149Abstract: In a semiconductor circuit of a current output type, when display is performed by plural semiconductor circuit in one display panel, luminance unevenness for each block with a different semiconductor circuit occurs due to fluctuation in the semiconductor circuits. In current output stages 14a and 14b, current mirror circuits are constituted at both ends of a chip, and a reference current to be a reference of gradation display is supplied from both the ends. Moreover, by increasing a resistance value of a gate line of the current mirror circuit of distributing a current to each output, deviation of a transistor threshold value in the chip was compensated for, and output currents at left and right ends were matched.Type: GrantFiled: January 31, 2007Date of Patent: October 19, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Hitoshi Tsuge
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Publication number: 20100259518Abstract: A current matching control apparatus for matching a plurality of current sources and a plurality of current sinks, the plurality of current sinks having a drive current value controlled by a drive processor in accordance with a reference control current and wherein each output of the plurality of current sinks are connected to a common output node; a feedback circuit having an input connected to the common output node and an output connected to the drive processor, wherein the feedback circuit is arranged to match a voltage at the common output node to a reference voltage by communicating a signal to the drive processor to adjust the reference control current.Type: ApplicationFiled: September 26, 2008Publication date: October 14, 2010Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LTD.Inventors: Euan C. Smith, Richard Alan Page, Stefan Wurster, Barry Thompson
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Publication number: 20100259528Abstract: A display driver control circuitry and method for controlling a display driver for an electroluminescent display, the display comprising at least one substantially constant current generator for driving the display element, the control circuitry comprising: a drive voltage sensor for sensing a drive voltage on a first line in which the current is regulated by the constant current generator; a reference voltage generator for providing a reference voltage offset from a supply voltage provided from a supply line to the constant current generator; means for determining a difference between the reference voltage and the drive voltage and for generating an adjustment signal, and wherein a voltage controller is configured to adjust the supply voltage responsive to the adjustment signal.Type: ApplicationFiled: September 26, 2008Publication date: October 14, 2010Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventors: Euan C. Smith, Richard Alan Page, Stefan Wurster, Barry Thompson
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Publication number: 20100253710Abstract: This invention relates to pixel driver circuits for active matrix optoelectronic devices, in particular OLED (organic light emitting diodes) displays. We describe an active matrix optoelectronic device having a plurality of active matrix pixels each said pixel including a pixel circuit comprising a thin film transistor (TFT) for driving the pixel and a pixel capacitor for storing a pixel value, wherein said TFT comprises a TFT with a floating gate.Type: ApplicationFiled: October 29, 2008Publication date: October 7, 2010Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LTD.Inventors: Aleksandra Rankov, Euan Christopher Smith
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Patent number: 7810006Abstract: A testing system for a device under test (DUT) includes a test parameter-generating device and a platform module. The test parameter-generating device stores test information, and is operable so as to execute a test algorithm, so as to generate a transmission signal upon execution of the test algorithm, and so as to generate a test environment with reference to the transmission signal. The platform module is operable so as to conduct testing of the DUT using the test information stored in the test parameter-generating device under the test environment generated by the test parameter-generating device.Type: GrantFiled: January 14, 2008Date of Patent: October 5, 2010Assignee: Emerging Display Technologies Corp.Inventors: Cheng-Liang Yao, Ming-Tsung Hsia
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Patent number: 7807070Abstract: A formulation for depositing a material on a substrate, the formulation comprising the material to be deposited on the substrate dissolved in a solvent system comprising a first solvent component having a relatively high boiling point and which exhibits a relatively low solubility with respect to the material to be deposited, and a second solvent component having a relatively low boiling point and which exhibits a relatively high solubility with respect to the material to be deposited.Type: GrantFiled: October 9, 2008Date of Patent: October 5, 2010Assignee: Cambridge Display Technology LimitedInventors: Christopher J. Bright, Julian Carter, Martin Cacheiro, Peter Lyon
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Publication number: 20100245401Abstract: A method of driving an electro-optic display comprising providing a current source, digitally modulating the current source and generating a modulated digital signal, and converting the modulated digital signal into an effective analog drive signal so that the display pixels receive an effective analog drive current, wherein the internal capacitance of the electro-optic display smooths the digitally modulated signal and generates the effective analog drive signal.Type: ApplicationFiled: September 26, 2008Publication date: September 30, 2010Applicant: CAMBRIDGE DISPLAY TECHNOLOGY LIMITEDInventors: Euan C. Smith, David S. Warren, Richard Alan Page, Stefan Wurster, Barry Thompson
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Patent number: 7804570Abstract: A liquid crystal display device includes an array substrate and an opposing substrate that are disposed face to face at a prescribed interval. The array substrate includes a scan line, signal lines, switching devices disposed at intersections between the scan line and the signal lines, pixel electrodes disposed in a matrix manner and driven by the switching devices and auxiliary capacitance lines for retaining applied voltage for the pixel electrodes. The pixel electrodes have side edges superposed on the signal lines or black matrices formed on the opposing substrate to achieve shielding of light, and the side edges have parts superposed on shield electrodes disposed on the auxiliary capacitance lines to make an amount of superposition between the pixel electrodes and the signal lines or the black matrices in a region corresponding to positions where the shield electrodes are disposed smaller than that in other regions.Type: GrantFiled: February 14, 2008Date of Patent: September 28, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Yoichi Hori
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Patent number: 7804634Abstract: The apparatus claimed by the invention uses as the display medium colors in the form of colored fluids which are transported by means of transport in a system of compartments within a fluidic chain, whereby they are visible from the direction of an observer only through a single one these compartments (image compartment). Depending on the position of the individual colored fluids, a different color impression is received by the observer. The invention thereby teaches the presence of a fluidic chain in a subpixel and the combination of a plurality of these subpixels in a pixel. The display claimed by the invention consists of a plurality of pixels. With the use of eight colors in connection with an optically created color mixing effect, a color space can be displayed which is sufficient at least for the display of the information typically used on advertising signs.Type: GrantFiled: April 21, 2009Date of Patent: September 28, 2010Assignee: Advanced Display Technology AGInventors: Oliver Müller-Marc, Dieter Jerosch
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Patent number: 7804547Abstract: A liquid crystal display device includes a liquid crystal display panel, a backlight which illuminates the liquid crystal display panel, and a display control circuit which controls the liquid crystal display panel and the illumination light source. The display control circuit includes a panel driving section which drives the liquid crystal display panel after supply of power, a state detecting section which detects a display driving state that the panel driving section drives the liquid crystal display panel for display of a stable image corresponding to a video signal, and a light source driving section which drives the backlight in accordance with an illumination request signal, after detection of the display driving state by the state detecting section.Type: GrantFiled: June 14, 2006Date of Patent: September 28, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventor: Kentaro Teranishi
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Publication number: 20100237341Abstract: An organic electroluminescence element having a cathode as a top electrode, and excelling in luminance efficiency, drive voltage, and operational life is provided. The organic electroluminescence element includes an anode over a substrate and a luminescent layer over the anode. The luminescent layer comprises an organic material. An electron injection layer is over the luminescent layer for injecting electrons into the luminescent layer. The electron injection layer is a metal including at least one of an alkaline metal and an alkaline earth metal. A fullerene layer is over the electron injection layer and includes fullerenes and at least one of an alkaline metal and an alkaline earth metal. The at least one of the alkaline metal and the alkaline earth metal included in the fullerene layer has a lower work function than a lowest unoccupied molecular orbit energy level of the fullerenes. A cathode is over the fullerene layer.Type: ApplicationFiled: June 1, 2010Publication date: September 23, 2010Applicants: PANASONIC CORPORATION, CAMBRIDGE DISPLAY TECHNOLOGY LTD.Inventors: Kenji Okumoto, Jeremy Burroughes, Julian Carter
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Patent number: 7800558Abstract: Display driver circuits for driving an organic light emitting diode display, particularly a passive matrix display with greater efficiency are described. The display includes at least one electroluminescent display element, and the driver includes at least one substantially constant current generator for driving the display element. The display driver control circuitry includes a drive voltage sensor for sensing a voltage on a first line in which the current is regulated by the constant current generator; and a voltage controller coupled to the drive voltage sensor for controlling the voltage of a supply for the constant current generator in response to said sensed voltage, and configured to control the supply voltage to increase the efficiency of said display driver.Type: GrantFiled: June 12, 2003Date of Patent: September 21, 2010Assignee: Cambridge Display Technology LimitedInventors: Paul R. Routley, Euan C. Smith
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Patent number: 7800594Abstract: In order to enhance accuracy of determination as to whether an object has contacted a screen and to enhance accuracy of calculation of a coordinate position of the object, edges of an imaged image are detected by an edge detection circuit 76, and by using the edges, it is determined by a contact determination circuit 77 whether or not the object has contacted the screen. Moreover, in order to appropriately control sensitivity of optical sensors in response to external light, by a calibration circuit 93, a drive condition of the optical sensors is changed based on output values of the optical sensors, which are varied in response to the external light.Type: GrantFiled: December 15, 2005Date of Patent: September 21, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Takashi Nakamura, Takayuki Imai, Masahiro Yoshida, Miyuki Ishikawa, Hirotaka Hayashi, Toshinori Kanuma
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Publication number: 20100230659Abstract: A process for the preparation of a polymerizable unit for production of a hole transporting polymer for use in an optical device, which process comprises reacting in the presence of S to form wherein each R is the same or different and is independently H or a substituent group; n is O or an integer from 1 to 100; Ar and Ar? are the same or different and are each aromatic or heteroaromatic groups which are substituted or unsubstituted; Y is a direct bond, a light emissive moiety, a hole transporting moiety or an electron transporting moiety; and X is a polymerizable group.Type: ApplicationFiled: December 23, 2005Publication date: September 16, 2010Applicant: Cambridge Display TechnologyInventors: Carl R. Towns, Caroline Towns
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Patent number: 7796222Abstract: A display device includes a first wiring line group of wiring lines connected to odd-number-th scan lines, a second wiring line group of wiring lines connected to even-number-th scan lines, a first inspection wiring line connected to first wiring lines of the first wiring line group, a second inspection wiring line connected to second wiring lines of the first wiring line group, which neighbor the first wiring lines, a third inspection wiring line connected to third wiring lines of the second wiring line group, and a fourth inspection wiring line connected to fourth wiring lines of the second wiring line group, which neighbor the third wiring lines.Type: GrantFiled: August 3, 2005Date of Patent: September 14, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Yohei Kimura, Koji Nakayama, Kazuyuki Harada
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Patent number: 7795802Abstract: 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: GrantFiled: July 18, 2005Date of Patent: September 14, 2010Assignee: Cambridge Display Technology Ltd.Inventors: Andrew Bruce Holmes, Xiao-Chang Li, Stephen Carl Moratti, Kenneth Andrew Murray, Richard Henry Friend
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Patent number: 7796203Abstract: A liquid crystal display device including gate wiring parts for supplying a scanning signal to switching elements formed in a matrix form in a display area, and source wiring parts for supplying a video signal to the switching elements, the liquid crystal display device having a plurality of inspection switching elements arranged in an area outside the display area, and connected to the gate wiring parts or the source wiring parts and a wiring part for electrically and mutually connecting source electrodes of the inspection switching elements by high resistance elements.Type: GrantFiled: February 7, 2008Date of Patent: September 14, 2010Assignee: Toshiba Matsushita Display Technology Co., Ltd.Inventors: Kazunori Hayakawa, Koji Nakayama