Cathodolulminescent Type Patents (Class 345/74.1)
  • Patent number: 10347183
    Abstract: An electroluminescent (EL) display apparatus and corresponding method of control are provided. A display screen includes gate signal lines which are arranged to intersect source signal lines. A pixel provided with an EL device corresponds to each intersection of the gate signal lines and the source signal lines. A driving transistor is provided for each pixel to supply a current to the EL device. A first switch transistor is provided for each pixel on a current path through which the current is supplied to the EL device. A gate driver circuit is connected to the gate signal lines. The gate driver circuit is configured to turn the first switch transistor on and off to simultaneously generate band-shaped non-display regions and band-shaped display regions on the display screen and to move the band-shaped non-display regions and the band-shaped display regions relative to the display screen.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: July 9, 2019
    Assignee: JOLED INC.
    Inventors: Hiroshi Takahara, Hitoshi Tsuge
  • Patent number: 10263050
    Abstract: A hybrid pixel arrangement for a full-color display is provided, which includes an inorganic LED in at least one sub-pixel, and an organic emissive stack in at least one other sub-pixel. In an embodiment, a first sub-pixel is configured to emit a first color, and includes an inorganic LED, a second sub-pixel is configured to emit a second color, and includes a first organic emissive stack configured to emit an initial color different from the first color. A third sub-pixel is configured to emit a third color different from the initial color.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: April 16, 2019
    Assignee: Universal Display Corporation
    Inventors: Michael Hack, Michael Stuart Weaver, William T. Mayweather, III, Julia J. Brown, Nicholas J. Thompson
  • Patent number: 10216602
    Abstract: In an embodiment, a latency measuring head is provided for use in measuring touch-to-response latency in a test device, the test device including a capacitive user interface that responds to touch input. The latency measuring head includes a conductive element adapted to be positioned in static proximity with and/or in contact with the capacitive user interface. An electron sink is operatively connected to the conductive element via a normally open switch having an open and a closed position. The electron sink has capacity to hold or dissipate a sufficient charge to trigger a touch event on the test device when the switch is closed. A photosensitive element is positioned in static proximity with and/or in contact with the capacitive user interface such that the photosensitive element can output a signal in response to a change in an optical property of at least a portion of the capacitive user interface.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: February 26, 2019
    Assignee: Tactual Labs Co.
    Inventors: Jonathan Deber, Bruno Rodrigues De Araujo, Ricardo Jorge Jota Costa, Clifton Forlines, Darren Leigh, Steven Leonard Sanders, Daniel Wigdor
  • Patent number: 10170054
    Abstract: An organic light emitting display that defines a plurality of pixels arranged in a matrix form as a plurality of pixel row groups, each of which includes the same number of pixel rows and individually drives the respective pixel row groups. The organic light emitting display includes a display unit including the plurality of pixels, a plurality of data lines, and a plurality of scan lines: a scan driving unit configured to apply scan signals to the plurality of pixels; a data driving unit configured to apply data voltages that are provided to the plurality of pixels to a first output line; and a data distribution unit configured to selectively connect at least two data lines that are continuously arranged to the first output line according to demultiplexing signals. The demultiplexing signals that correspond to the pixel rows included in the respective pixel row groups have different pulse widths.
    Type: Grant
    Filed: April 20, 2015
    Date of Patent: January 1, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang Hun Park, Dong Wan Park, Myoung Seop Song
  • Patent number: 9703423
    Abstract: One object is to provide a new electronic device which is configured so that a user can read data regardless of a location, input data by directly touching a keyboard displayed on a screen or indirectly touching the keyboard with a stylus pen or the like, and use the input data. A first transistor electrically connected to a reflective electrode and a photo sensor are included over one substrate. A touch-input button displayed on a first screen region of the display portion is displayed as a still image, and a video signal is output so that a moving image is displayed on a second screen region of the display portion. A video signal processing portion supplying different signals between the case where a still image is displayed on the display portion and the case where a moving image is displayed on the display portion is included.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: July 11, 2017
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Hikaru Tamura, Shunpei Yamazaki
  • Patent number: 9450133
    Abstract: Thin film transistors including an oxide semiconductor containing indium, gallium, and zinc are easily arranged in a matrix over a large substrate and have small characteristic variations. With amplifier circuits and driver circuits of display elements which include the thin film transistors including an oxide semiconductor containing indium, gallium, and zinc with small characteristic variations, intensity distribution of light received by the photodiodes arranged in a matrix is converted into electrical signals with high reproducibility and output, and the display elements arranged in a matrix can be uniformly driven.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: September 20, 2016
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yasuo Nakamura, Yoshifumi Tanada
  • Patent number: 9366934
    Abstract: A field sequential color (FSC) ferroelectric liquid crystal (FLC) display cell, part of an FSC display, is provided. The FSC FLC display cell includes: two polarizers; an FLC layer, positioned between the two polarizers, the FLC layer comprising FLCs with helix pitch less than the thickness of the FLC layer; and a voltage source, configured to apply an electrical driving voltage to the FLC layer, the electrical driving voltage applied to the FLC layer having an amplitude greater than a threshold voltage for helix unwinding, and wherein the voltage source is further configured to apply electrical driving voltages to light emitting diodes (LEDs) of the FSC display to illuminate pixels of the FSC display. The pixels are illuminated in an FSC manner. The FLC layer is configured to provide a defect-free layer of FLC under the electrical driving voltage applied to the FLC layer.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: June 14, 2016
    Assignee: The Hong Kong University of Science and Technology
    Inventors: Abhishek Kumar Srivastava, Ying Ma, Vladimir Grigorievich Chigrinov, Hoi Sing Kwok
  • Patent number: 9244488
    Abstract: Display device includes: a first terminal part configured by arranging a plurality of connectors on a substrate; and a second terminal part configured by arranging a plurality of connectors on the substrate. The first terminal part includes a first support tool. The first support tool is provided with openings through which connection cables can be attached respectively to the connectors, and also provided with a first and a second mounting piece to be mounted on a mounting part. The second terminal part includes a second support tool. The second support tool is provided with openings through which connection cables can be attached respectively to the connectors, and also provided with a first mounting piece to be mounted on the mounting part on which the first mounting piece of the first support tool is mounted, and with a second mounting piece to be mounted on another mounting part.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: January 26, 2016
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Shinichi Shinohara
  • Patent number: 9213213
    Abstract: A three-dimensional image display apparatus includes a display panel which receives light and displays an image, a liquid crystal lens panel which refracts the light exiting from the display panel, a lens driver which drives the liquid crystal lens panel, a timing controller which controls the lens driver, a power supply unit which provides the liquid crystal lens panel with a driving voltage in response to a control of the timing controller, and a driver data value storage unit which stores a driver data value and applies the driver data value stored therein to the lens driver when the data driver storage unit is turned on, where the lens driver operates the liquid crystal lens panel using the driving voltage and the driver data value in response to the control of the timing controller.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: December 15, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Cheolwoo Park, Joo-Young Kim, Jung-taek Kim, Geunjeong Park, KyoungHo Lim, Ji-woong Jeong
  • Patent number: 9171690
    Abstract: A field emission device is configured as a heat engine, wherein the configuration of the heat engine is variable.
    Type: Grant
    Filed: February 22, 2013
    Date of Patent: October 27, 2015
    Inventors: Jesse R. Cheatham, III, Philip Andrew Eckhoff, William Gates, Roderick A. Hyde, Muriel Y. Ishikawa, Jordin T. Kare, Nathan P. Myhrvold, Tony S. Pan, Robert C. Petroski, Clarence T. Tegreene, David B. Tuckerman, Charles Whitmer, Lowell L. Wood, Jr., Victoria Y. H. Wood
  • Patent number: 9099168
    Abstract: An integrated circuit includes a positive power supply node, a current tracking circuit, and a current mirroring circuit including a plurality of current paths coupled in parallel. The currents of the plurality of current paths mirror a current of the current tracking circuit. The current mirroring circuit is configured to turn off the plurality of current paths one-by-one in response to a reduction in a positive power supply voltage on the positive power supply node. The integrated circuit further includes a charging node receiving a summation current of the plurality of current paths, wherein a voltage on the charging node is configured to increase through a charging of the summation current.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: August 4, 2015
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Hsu-Shun Chen, Cheng-Hung Lee, Hong-Chen Cheng, Chung-Yi Wu
  • Patent number: 9076402
    Abstract: A liquid crystal display device includes a pixel array substrate having signal lines and scan lines arranged in a matrix, and pixel circuits arranged at intersections of the signal and scan lines. A touch panel is attached on the counter substrate to draw pictures or characters on a display panel. A first voltage generation circuit generates an analog pixel voltage applied to the signal lines and a second voltage generation circuit generates a counter electrode voltage applied to the counter electrode. A settling adjustment circuit adjusts a settling time of at least one of the analog pixel voltage and the counter electrode voltage.
    Type: Grant
    Filed: February 2, 2010
    Date of Patent: July 7, 2015
    Assignees: Kabushiki Kaisha Toshiba, JAPAN DISPLAY INC.
    Inventors: Satoru Yamanaka, Shinichi Hirota, Kazuya Arima
  • Patent number: 8970455
    Abstract: Systems and methods are provided for managing the display of content on a display screen (110) of an electronic device (100). According to certain aspects, a sensor (119) or a set of a plurality of sensors (225) generate image data corresponding to a user viewing the device. Further, in one embodiment, a film (111) generates electrical signals corresponding to a shape or configuration of the display screen. The electronic device can calculate a distortion parameter based on the electrical signals. In another embodiment, an additional set of the plurality of sensors generates image data, from which the electronic device can calculate the distortion parameter. The electronic device generates processed image data based on the viewing position and the distortion parameter, and displays the processed image data on the display screen in such a way that the content appears oriented and proportioned to the user viewing the display screen.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: March 3, 2015
    Assignee: Google Technology Holdings LLC
    Inventors: Dean E Thorson, William P Alberth, Jr.
  • Patent number: 8693065
    Abstract: A carry case includes a body, a cover, and a lock unit. The body houses an image scanner. The cover is supported with respect to the body such that the cover can rotate around a longitudinal direction of the body. The lock unit locks the cover to the body in a closing state in which the cover covers the body after being rotated with respect to the body in an approaching direction along which the cover approaches the body. The cover is rotated with respect to the body in a withdrawing direction opposite to the approaching direction while the lock held by the lock unit is being released, so that the cover is developed to form a discharge path of a read medium.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: April 8, 2014
    Assignee: PFU Limited
    Inventor: Mikio Murosaki
  • Patent number: 8576258
    Abstract: For improving the brightness decay of a display due to its aging, a non-volatile memory such as Flash can be used to store a brightness accumulation value of each point of the display, and each point can be compensated for its brightness accordingly. However, the non-volatile memory suffers from incorrect write-in data or temporary power disconnection, and thus the error will exist all the time to make the display non-even. Hence, the present invention uses a multiple data backups and CRC error detection, plus new/old data comparison to protect data the non-volatile memory from incorrect brightness compensation value so as to uniform the brightness of the display.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: November 5, 2013
    Assignee: Holtek Semiconductor Inc.
    Inventors: Tzong-Kwei Chen, Chun-Lin Shen, Yi-Chen Liu, Chen-Ting Kuan
  • Patent number: 8570246
    Abstract: A system for operating a color flat panel display (FPD) is provided that includes a color FPD, a light source, and a display processing device. The color FPD has an adjustable color depth and is configured to reflect ambient light. The light source transmits light through the bottom surface of the color FPD. The display processing device is coupled to the color FPD and decreases the color depth of the color FPD when the light source is activated and increases the color depth of the color FPD when the light source is turned off.
    Type: Grant
    Filed: January 3, 2012
    Date of Patent: October 29, 2013
    Assignee: BlackBerry Limited
    Inventors: Robert J. Lowles, James Alexander Robinson
  • Patent number: 8564860
    Abstract: An image processor includes an identifying unit, a first correcting unit, and a second correcting unit. The identifying unit identifies a white point value of an image represented by first image data. The white point value indicates a first color temperature. The first correcting unit performs a white balance correction on the first image data such that the white point value approaches a target white point value. The target white point value indicates a second color temperature. The second correcting unit performs a brightness correction for correcting the first image data corrected by the first correcting unit into second image data such that an image corresponding to the second image data is brighter as the second color temperature is higher than the first color temperature and such that the image corresponding to the second image data is darker as the second color temperature is lower than the first color temperature.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: October 22, 2013
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventor: Kazuhide Sawada
  • Patent number: 8373640
    Abstract: In one embodiment of the present invention, a display device is disclosed which performs a divided-screen active driving, and which allows (i) its emitting region to be divided into smaller units, irrespective of the smallest module unit of a light source; and (ii) minimizing increase in costs for a driving system and manufacturing of an area light source, a display device of the present invention includes: a display panel having unit display pixels; an area light source arranged on a back surface of the display panel, the area light source having an emitting region which is divided into divided emitting regions; and a controlling section for controlling luminance of each of the divided emitting regions of the area light source, based on luminance information of video signals input, wherein the area light source includes: unit emitting pixels which controls light emission of the divided emitting regions through a matrix driving; the unit emitting pixels each having an electron emitting element for emitting an
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: February 12, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Ishizumi, Yoshihiro Izumi, Yasukuni Yamane
  • Patent number: 8339426
    Abstract: A display apparatus can perform a high quality moving picture display and provides improved color purity, and includes an illumination device that prevents and minimizes light unevenness in the form of a lamp image. The display apparatus includes an illumination device in which a first scattering layer, a first light-condensing layer, a second scattering layer, and a second light-condensing layer are arranged so as to cover a light-radiating surface of a light source unit including a first light source that emits light of a first color and a second light source that emits light of a second color complementary to the first color, a gate driver arranged to sequentially select each one of scanning lines at a cycle of 0.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: December 25, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kentaro Kamada
  • Patent number: 8330707
    Abstract: A lighting device for a cold-cathode tube includes an inverter that supplies a current through the cold-cathode tube, an operation portion through which a luminance adjustment is performed, an inverter control circuit that controls the inverter in accordance with a luminance adjustment value adjusted through the operation portion so as to change the current flowing through the cold-cathode tube, and a protective circuit that stops operation of the inverter when the current flowing through the cold-cathode tube becomes smaller than a predetermined set value. The protective circuit of the lighting device is controlled in such a way that the protective circuit does not operate when the luminance adjustment value adjusted through the operation portion is smaller than a luminance threshold value.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: December 11, 2012
    Assignee: Fujitsu Limited
    Inventor: Isamu Kaneyasu
  • Patent number: 8325118
    Abstract: In a pixel circuit 100, a driving TFT 110, a switching TFT 115, and an organic EL element 130 are provided between a power supply wiring line Vp and a common cathode Vcom and a capacitor 120 and a switching TFT 111 are provided between a gate terminal of the driving TFT 110 and a data line Sj. A switching TFT 112 is provided between a connection point B between the capacitor 120 and the switching TFT 111 and the power supply wiring line Vp, a switching TFT 113 is provided between the gate and drain terminals of the driving TFT 110, and a switching TFT 114 is provided between the gate terminal of the driving TFT 110 and a reference supply wiring line Vs. A potential that brings the driving TFT 110 into a conduction state is applied to the reference supply wiring line Vs. Thus, variations in the threshold voltage of a drive element can be properly compensated for and unwanted light emission from an electro-optical element can be prevented.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 4, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takahiro Senda
  • Patent number: 8259039
    Abstract: A difference between the black level potential VB and the white level potential VW in the effective bright environment is smaller than a difference between the black level potential VB and the white level potential VW in the effective dark environment, and the black emission luminance in the effective bright environment is lower than or equal to a diffuse reflection luminance in the effective bright environment and higher than a black emission luminance in the effective dark environment.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: September 4, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Naoto Abe
  • Patent number: 8111210
    Abstract: A system for operating a color flat panel display (FPD) is provided that includes a color FPD, a light source, and a display processing device. The color FPD has an adjustable color depth and is configured to reflect ambient light. The light source transmits light through the bottom surface of the color FPD. The display processing device is coupled to the color FPD and decreases the color depth of the color FPD when the light source is activated and increases the color depth of the color FPD when the light source is turned off.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: February 7, 2012
    Assignee: Research In Motion Limited
    Inventors: Robert J. Lowles, James A. Robinson
  • Patent number: 8085223
    Abstract: A driving method of an image display apparatus includes the steps of: applying a non-selection potential to a first scanning wiring; and applying a selection potential to the first scanning wiring. A voltage applied to an electron-emitting device connected to the first scanning wiring is set to a voltage having a polarity reverse to that of a voltage to be applied upon emitting electrons during at least partial period of a period when the non-selection potential is applied to the first scanning wiring. The voltage applied to the electron-emitting device connected to the first scanning wiring is set to zero volt or to a voltage having a polarity same as that of the voltage to be applied upon emitting electrons and less than the threshold voltage, during a predetermined period before the selection potential is applied to the first scanning wiring.
    Type: Grant
    Filed: August 8, 2008
    Date of Patent: December 27, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yutaka Nakai
  • Patent number: 8022633
    Abstract: In the case where the number of pixels is increased in a display device making use of electron source elements, a period, in which one pixel is caused to continue to emit light, shortened, and so there is caused a need of applying a high voltage between upper and lower electrodes of an electron source element in a short period. Therefore, there is caused a problem that a drive circuit is made severe in operating condition and so the display device is degraded in reliability. Two TFTs are arranged on each of pixels. Also, a time gradation system is used, in which one frame period is divided into a plurality of sub-frame periods, a light emitting or non-emitting state of each of the pixels is selected in the respective sub-frame periods, and gradation is represented by adding up periods, in which the light emitting state is selected in the respective sub-frame periods. Thus it is possible to provide a display device having a high reliability and a method of driving the same.
    Type: Grant
    Filed: February 11, 2011
    Date of Patent: September 20, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Jun Koyama
  • Patent number: 7995851
    Abstract: A method of and an apparatus for image enhancement taking ambient illuminance into consideration. The image enhancement method includes calculating an original-luminance contrast which is a luminance contrast with respect to an original-luminance of pixels forming an original image, calculating a fade-luminance by reflecting the variation of perceived luminance based on an ambient illuminance into the original-luminance, calculating a defade-luminance by converting the fade-luminance to maintain the original-luminance contrast, and calculating a display-luminance by reflecting the variation of perceived luminance by the ambient illuminance into the defade-luminance. Improving luminance contrast through adjustment of luminance based on ambient illuminance, effectively reduces the fade phenomenon.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: August 9, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seong-deok Lee, Chang-veong Kim, Dmitry Lebedev, Galina Rozhkova, Vladmir Bastakov, Young-Shin Kwak
  • Patent number: 7973742
    Abstract: A method for driving a field emission device (FED) applies an alternating (AC) voltage as a driving voltage for emitting electrons in a field emission device comprising cathode electrode including an emitter and an anode electrode facing the cathode electrode. A method for aging an FED uses a constant voltage so that electrons cannot be emitted from the electron emission source, and an AC voltage so that electrons can be periodically emitted from the emitter when the FED is aged.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: July 5, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Chan-Wook Baik, Jeong-Hee Lee, Jeong-Na Heo, Deuk-Seok Chung, Tae-Won Jeong, Kyoung-Won Min
  • Patent number: 7944457
    Abstract: An image display method adapted for a digital display apparatus is provided. The image display method includes the steps of: first, detecting a maximum average picture level of each picture displayed by the digital display apparatus; judging whether the maximum average picture level is larger than a reference value; determining a displaying mode of each picture according to the judgment. The image display method is adapted for improving the displaying quality of a digital display apparatus.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: May 17, 2011
    Assignee: Coretronic Corporation
    Inventors: Tzung-I Lin, Yi-Chun Lu, Chia-Yin Lu
  • Patent number: 7924243
    Abstract: The present invention relates to an image display apparatus for forming an image with a plurality of luminescent spots to be precisely aligned in a matrix. For example, a spacer disposed between an electron source and a face plate causes luminescent spots on the face plate spaced unevenly. The luminescent spots spaced unevenly will produce a visual unevenness in luminance which deteriorates the quality of produced image. By modifying the quantity of light of luminescent spots spaced unevenly, the visual unevenness in luminance is compensated.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: April 12, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Izumi Kanai, Yukio Hiraki, Makiko Mori, Kohei Inamura, Masaru Tada, Toshiyuki Kanda, Tatsuro Yamazaki
  • Patent number: 7888878
    Abstract: In the case where the number of pixels is increased in a display device making use of electron source elements, a period, in which one pixel is caused to continue to emit light, shortened, and so there is caused a need of applying a high voltage between upper and lower electrodes of an electron source element in a short period. Therefore, there is caused a problem that a drive circuit is made severe in operating condition and so the display device is degraded in reliability. Two TFTs are arranged on each of pixels. Also, a time gradation system is used, in which one frame period is divided into a plurality of sub-frame periods, a light emitting or non-emitting state of each of the pixels is selected in the respective sub-frame periods, and gradation is represented by adding up periods, in which the light emitting state is selected in the respective sub-frame periods. Thus it is possible to provide a display device having a high reliability and a method of driving the same.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: February 15, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Jun Koyama
  • Patent number: 7884780
    Abstract: An electron emission display device and a method of correcting an image signal to enhance an image quality by reducing luminance unevenness among pixels. The display device includes: a display region having an anode electrode configured to collide with electrons emitted depending on a voltage applied to first and second electrodes, the image signal being corrected using a correction factor; an image signal generator for generating the corrected image signal by multiplying the image signal by the correction factor to generate a result, dividing the result by a first number to generate a quotient and a remainder, and summing the quotient with a second number corresponding to a value of the remainder; a data driver for generating a data signal using the image signal and for transferring the data signal to the first electrode; and a scan driver for generating and transferring a scan signal to the second electrode.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: February 8, 2011
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Mun Seok Kang
  • Patent number: 7859487
    Abstract: An image display device and a method of controlling an image display device are provided. The image display device may include a signal processor having a plurality of input/output ports to control a degaussing operation and a data download, a degaussing circuit connected a first port of the signal processor to perform the degaussing operation during a first mode, and a download interface connected to the first port of the signal processor to download data on the signal processor during a second mode.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: December 28, 2010
    Assignee: LG Electronics Inc.
    Inventor: Ji Woon Kim
  • Patent number: 7852313
    Abstract: A display device comprises a light source consisting of three emission elements, each of which emits light of different wavelength regions corresponding to the respective colors of red, green and blue, and a display module consisting of a display part wherein each pixel has two types of color filters that transmit red and green light and green and blue light, respectively. One frame of video signals is split during display to become two subframes and it is possible to alternately emit for each subframe green light, which is transmitted through both color filters, and red and blue light, each of which is transmitted through only one filter.
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: December 14, 2010
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventor: Nobutoshi Sekiguchi
  • Patent number: 7830339
    Abstract: An image display apparatus includes a rear plate having electron-emitting devices, a face plate having light-emitting regions, a spacer arranged between the rear plate and the face plate, and a drive circuit having a correction circuit which corrects input image data. A quantity of light emitted from an object light-emitting region depends on the quantity of electrons coming from a corresponding object electron-emitting device and coming from peripheral light-emitting regions of the object light-emitting region, and the quantity of light emitted from the object light-emitting region decreases when at least some of the emitted electrons are blocked by the spacer.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: November 9, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hideaki Yui
  • Patent number: 7812791
    Abstract: An electron emission display and a driving method thereof adjust a brightness differently according to a brightness of a frame in order to reduce power consumption and prevent a gradual failure from occurring, and easily recognize a change of the brightness. A pixel portion receives a data signal and a scan signal, and displays an image. A data driver generates the data signal using video data and transfers the data signal to the pixel portion. A scan driver transfers the scan signal to the pixel portion. A timing controller transfers a drive signal to drive the data driver and the scan driver, to the data driver and the scan driver. A data processor generates a control signal corresponding to frame data obtained by summing a value of video data inputted during one frame. A power supply section generates a drive voltage and transfers the drive voltage to the pixel portion, the data driver, the scan driver, the timing controller, and the data processor.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: October 12, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Dong Hyup Jeon
  • Publication number: 20100149225
    Abstract: A display apparatus can perform a high quality moving picture display and provides improved color purity, and includes an illumination device that prevents and minimizes light unevenness in the form of a lamp image. The display apparatus includes an illumination device in which a first scattering layer, a first light-condensing layer, a second scattering layer, and a second light-condensing layer are arranged so as to cover a light-radiating surface of a light source unit including a first light source that emits light of a first color and a second light source that emits light of a second color complementary to the first color, a gate driver arranged to sequentially select each one of scanning lines at a cycle of 0.
    Type: Application
    Filed: March 28, 2008
    Publication date: June 17, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kentaro Kamada
  • Patent number: 7724248
    Abstract: An image display apparatus includes a display panel that displays an image, and a detecting unit that detects a magnitude of deformation of the display panel. In addition, a control unit controls display on the display panel according to an output of the detecting unit such that the magnitude of deformation of the display panel becomes equal to or smaller than a predetermined value.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: May 25, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Akio Saito
  • Patent number: 7723664
    Abstract: An imaging apparatus includes an electron emission array having electron sources arranged in matrix form and having a plurality of horizontal scan lines, a photoelectric conversion film opposed to the electron emission array, and a control and drive circuit configured to select one or more of the horizontal scan lines in a given video signal output period and to cause the electron sources included in the selected one or more horizontal scan lines to emit electrons toward the photoelectric conversion film to produce a video signal, wherein the control and drive circuit is configured to control electron emission of the electron emission array in a blanking period in response to a signal level of the video signal produced in the given video signal output period.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: May 25, 2010
    Assignees: Nippon Hoso Kyokai, Hamamatsu Photonics K.K., Futaba Corporation, Pioneer Corporation
    Inventors: Yuki Honda, Masakazu Namba, Yoshiyuki Hirano, Saburo Okazaki, Norifumi Egami, Toshihisa Watabe, Yoshiro Takiguchi, Akira Kobayashi, Shigeo Itoh, Masateru Taniguchi, Kazuhito Nakamura, Kenta Miya, Takahiro Niiyama, Yoshiyuki Okuda
  • Patent number: 7724215
    Abstract: A display which does not require color filters, has low optical losses, and is not heavy and large, and a method for displaying an image using the display includes a substrate on one side of which sub-pixels are arranged. Each sub-pixel includes two opposite electrodes and an emitter layer which is interposed between the two electrodes. The emitter layer receives the light projected from an excitation light source, and is able to radiate photoluminescence light. The photoluminescence light from the emitter layer may be controllably quenched by an electrical field formed by the electrodes.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: May 25, 2010
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventor: Michael Redecker
  • Patent number: 7710363
    Abstract: A method of controlling display of a grey level at an associated image point on a matrix display screen. The screen includes lines and columns for which the intersections form an image point. Samples with non-linear proportional light intensity are used to display grey levels, instead of using samples with linear proportional light intensity, by selecting a coding that matches the response curve of the human eye because the eye is more sensitive to brightness differences at a low illumination level than at a high level. Its perception of brightness follows a non-linear law called the gamma correction law which in particular has been modelled by the International Lighting Commission (ILC).
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: May 4, 2010
    Assignee: Commissariat a L'Energie Atomique
    Inventor: Denis Sarrasin
  • Patent number: 7705808
    Abstract: A driving apparatus, and a driving method for an electron emission display, includes a controller for comparing external video data input signals, switching a polarity control signal in a predetermined period on the basis of the comparison and controlling a video data output signal in accordance with the polarity control signal, and a data driver for modulating the video data signal output from the controller. The switching of the polarity control signal may be shifted temporally when the comparison indicates the video data input signals have the same gray level.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: April 27, 2010
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Dong Hyup Jeon, Chul Ho Lee
  • Patent number: 7696959
    Abstract: Scan electrode potential detected by a feedback switch is inputted into a negative-phase input terminal of an amplifier, reference selection potential from a reference-selection-potential-signal generation circuit is inputted into a positive-phase input terminal of the amplifier, and the reference-selection-potential-signal generation circuit delays reference potential of a reference voltage source, thereby scan electrode potential without overshooting components can be achieved.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: April 13, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hiroyuki Nitta, Masahisa Tsukahara, Toshifumi Ozaki
  • Publication number: 20100053126
    Abstract: An electron emission device includes a polycrystalline film of lanthanum boride, and a size of a crystallite which composes the polycrystalline film is equal to or more than 2.5 nm and equal to or less than 100 nm, preferably the film thickness of the polycrystalline film is equal to or less than 100 nm.
    Type: Application
    Filed: August 28, 2009
    Publication date: March 4, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tamaki Kobayashi, Shoji Nishida, Takuto Moriguchi, Takeo Tsukamoto
  • Patent number: 7612743
    Abstract: An Electron Emission Display (EED) with decreased signal distortion has a data driver to convert data driving signals into display data signals having predetermined data voltage levels and to output the display data signals to data electrode lines. A method of driving the EED includes supplying an auxiliary voltage to the data electrode lines during blanking periods according to subsequent data and supplying the display data signals during active periods between the blanking periods.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: November 3, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventors: Ji-Won Lee, Duck-Gu Cho
  • Publication number: 20090179830
    Abstract: An image display apparatus includes a display panel having a plurality of electron emission portions that emit electrons, a plurality of light emitting regions positioned corresponding to the plurality of electron emission portions to emit light in response to irradiation of electrons from the electron emission portion thereon, and a shielding member provided between a substrate having the electron emission portions provided thereon and an opposing substrate having the light emitting regions thereon, and a correction circuit that corrects a pixel signal for modulating the electron emission portions. The shielding member shields electrons reflected from peripheral light emitting regions adjacent to a predetermined one of the light emitting regions to the predetermined light emitting region, and irradiates electrons from the shielding member to the predetermined light emitting region.
    Type: Application
    Filed: March 5, 2009
    Publication date: July 16, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hideaki Yui, Akira Hayama
  • Patent number: 7542016
    Abstract: An Electron Emission Device (EED) that can reduce background-brightness resulting from collisions between anodes and only a few electrons when data is not supplied to an electron emission display panel includes: an electron emission display panel including scan electrodes, data electrodes, and anodes, electrons colliding with the anode in accordance with a voltage difference between the scan electrodes and the data electrodes; a discharge current measuring unit adapted to measure a discharge current value of the electron emission display panel; a comparison unit adapted to output control signals proportional to a current difference between the measured discharge current value and an inputted reference value; a scan voltage control unit adapted to amplify an output voltage of sequentially outputted scanning signals to scan electrode lines of the electron emission display panel according to scan driving signals having a predetermined frequency, the scan voltage control unit operating in accordance with the cont
    Type: Grant
    Filed: June 9, 2005
    Date of Patent: June 2, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Seong-Kwon Kim
  • Patent number: 7535439
    Abstract: A display device driver constructed of scanning selection switches corresponding to a plurality of scanning wiring lines, a non-selection switch which brings the scanning wiring line into a non-selected state, a feedback switch which detects a scanning electrode potential and a negative feedback amplifier which sets the scanning electrode potential to a predetermined potential every electrode based on the scanning electrode potential detected by the feedback switch, and a time constant formed of a combined capacitance of a capacitance of the feedback switch and a wiring line capacitance and a feedback switch resistance is set to be smaller than that of a display panel capacitance and a scanning selection switch resistance.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: May 19, 2009
    Assignee: Hitachi Displays, Ltd.
    Inventors: Hiroyuki Nitta, Masahisa Tsukahara, Toshifumi Ozaki
  • Patent number: 7525518
    Abstract: An image display apparatus includes an image display devices driven in a matrix by a plurality of row wirings and column wirings, a scanning circuit for sequentially selecting and scanning the row wirings, a modulation circuit for applying a modulated signal, voltage amplitude of which varies in one pulse signal, to the column wirings, and a voltage drop compensation circuit for calculating corrected image data for reducing an influence of voltage drops due to at least resistance components of the row wirings, with respect to image data. The voltage drop compensation circuit include an effective voltage calculating circuit for finding an effective voltage value on the basis of the image data, and a compensation value calculating circuit for calculating a compensation value for reducing an influence of voltage drops due to at least resistance components of the row wirings, with respect to the effective voltage value.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: April 28, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Osamu Sagano, Hiroshi Saito
  • Patent number: 7522131
    Abstract: An Electron Emission Display (EED) device, adapted to of adjust a pulse width of data signal according to an active pulse width of a horizontal synchronization signal, includes: a scan driver, a data driver; an EED panel displaying display data; a reference signal memory adapted to store a lookup table of active pulse widths of horizontal synchronization signals defined by a system clock and reference signals corresponding to the active pulse widths of the horizontal synchronization signals; a reference signal referring unit adapted to output a reference signal in accordance with the lookup table stored in the reference signal memory; and a gray level signal generator adapted to count the reference signal and output a gray level signal to the data driver, the data driver outputting video data corresponding to the gray level signal to data electrode lines of the EED panel.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: April 21, 2009
    Assignee: Samsung SDI Co., Ltd.
    Inventor: Mun-Seok Kang
  • Publication number: 20090058836
    Abstract: An apparatus and method for revising video data for en electron emission display device to improve image quality by reducing non-uniformity in luminance of a plurality of pixels. In an exemplary embodiment, a display region includes a plurality of pixels, each pixel comprising at least one electron emission device. A scan driver and a data driver control the pixels through electrodes coupled to the display region. A revision coefficient unit is coupled to the display driver, for storing a plurality of revision coefficients, receiving and revising video data utilizing the revision coefficients, and sending revised video data to the data driver. The revision coefficients correspond to first average luminance values of first lines of pixels extending in a first direction, and second average luminance values of second lines of pixels extending in a second direction.
    Type: Application
    Filed: June 12, 2008
    Publication date: March 5, 2009
    Inventors: Mun-seok Kang, Chul-ho Lee, Young-jun Yun