Patents Examined by Chanh Nguyen
  • Patent number: 8599117
    Abstract: An emission control driver includes a plurality of stages, each of the plurality of stages including a first driver for outputting a first output signal corresponding to one of the first output signal output from a previous stage or a first start pulse; a second driver for outputting a second output signal corresponding to one of the second output signal output from the previous stage or a second start pulse; and a third driver for receiving the first and second output signals and for outputting an emission control signal.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: December 3, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hwan-Soo Jang
  • Patent number: 8599120
    Abstract: An LCD device includes a display panel having a plurality of pixels on which an image is displayed and a timing controller, which includes a receiver receiving image data in series for displaying the image on the display panel wherein the image data being made up of pixel data of three prime colors that are Red, Green and Blue for each pixel, a serial/parallel converter sorting the image data received at the receiver in the order that the display panel can display the image, a sub-pixel generator generating complementary color image data, which are image data of the complementary color indicating the image indicated by the sorted image data, based on information of the sorted image data, and a transmitter transmitting the sorted image data and the complementary color image data.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: December 3, 2013
    Assignee: Lapis Semiconductor Co., Ltd.
    Inventor: Hideki Kanou
  • Patent number: 8599122
    Abstract: A display device includes a gate driving part, a data driving part, a display panel and a kickback voltage compensating part. The gate driving part outputs a gate signal, and the data driving part outputs a data signal. The display panel displays an image in response to the gate signal and the data signal. A pixel voltage of the display panel is reduced by a kickback voltage varied based on a gray scale and induced when the gate signal falls. The kickback voltage compensating part compensates an image control signal externally provided to the kickback voltage compensating part for the kickback voltage to output a data control signal to the data driving part.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: December 3, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyoung-Ju Shin, Jun-Hyung Souk, Chong-Chul Chai
  • Patent number: 8593416
    Abstract: A touch device includes a touch panel, a sensing unit, and an operation unit is provided. The sensing unit is coupled to the touch panel, for scanning a scan area of the touch panel to output a touch signal. The operation unit is coupled to the sensing unit, for determining the scan area according to the touch signal. When the touch signal corresponds to a first close path, the operation unit defines a close area formed by the first close path as the first sub touch area. When the first sub touch area is undefined, the operation unit chooses a whole touch area of the touch panel as the scan area. When the first sub touch area is defined, the operation chooses the first sub touch area as the scan area.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: November 26, 2013
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Ming-Ta Hsieh, Shian-Jun Chiou, Hsueh-Fang Yin, Chien-Ming Lin, Huai-An Li
  • Patent number: 8593383
    Abstract: A liquid crystal display has a substrate, data lines, scan lines, pixel units and a pre-charge circuit. The data lines are disposed on the substrate in a first direction. The scan lines are disposed on the substrate in a second direction substantially perpendicular to the first direction. The pixel units are respectively disposed at the intersections of the data lines and the scan lines. The pre-charge circuit includes a pre-charge potential, a pre-charge capacitor and a pre-charge switch. The pre-charge capacitor has a first electrode coupled to the pre-charge potential. The pre-charge switch has a first terminal for receiving a pre-charge signal, a second terminal coupled to one of the data lines, and a third terminal coupled to a second electrode of the pre-charge capacitor.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: November 26, 2013
    Assignee: AU Optronics Corporation
    Inventor: Chung-Chun Chen
  • Patent number: 8593447
    Abstract: A voltage adjustment circuit for adjusting a voltage to be supplied to scanning lines of a display device includes a slope adjustment circuit configured to adjust a slope of a decrease in the voltage based on data that is externally input, and a clamp voltage adjustment circuit configured to adjust a voltage value at which the voltage is clamped based on the data.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: November 26, 2013
    Assignee: Spansion LLC
    Inventors: Katashi Hasegawa, Masaya Mizutani
  • Patent number: 8593490
    Abstract: A voltage regulation method is provided and includes the following steps. A plurality of fixed voltages is provided to a gray-level resistor string, and a plurality of gray-level voltages and the fixed voltages are divided into a first voltage group and a second voltage group according to signal-to-noise ratios of the gray-level values. It is to determine whether the regulated fixed voltage is used to regulate a gray-level voltage corresponding to low gray-level value according to different voltage group. When the regulated fixed voltage is used to regulate the gray-level voltage corresponding to low gray-level value, it is determined whether the fixed voltage is regulated again by measuring a luminance value of a gray-level voltage having higher signal-to-noise ratio.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: November 26, 2013
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Ping-Hsien Chen, Bi-Hsien Chen
  • Patent number: 8587512
    Abstract: There is provided a display device including a voltage application device that performs, with respect to a display medium including, a pair of substrates, plural types of particle groups disposed between the pair of substrates, a first electrode, plural second electrodes, and a third electrode, in succession after a first process, a second process of application of voltages to the display medium to the first through third electrodes such that the first particle group that has passed through the aperture in the third electrode due to the first process moves towards a downstream substrate of the pair of substrates disposed on the downstream side in the passing direction of the first particle group through the aperture, and the second particle group that has not passed through the aperture of the third electrode due to the first process moves towards the substrate on the side facing the downstream substrate.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: November 19, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Naoki Hiji, Masaaki Abe, Yoshinori Machida, Ryota Mizutani
  • Patent number: 8587575
    Abstract: A driving method of a display device that includes a display panel including a plurality of light emitting elements, is supplied with a power source voltage, and includes a saturation region and a non-saturation region according to variation of a panel current flowing to the display panel is provided. The driving method includes sensing the panel current, determining the power source voltage and the panel current, controlling a feedback voltage to drive the power source voltage to be equal to a saturation voltage corresponding to a saturation point at a boundary between the saturation region and the non-saturation region based on the determined power source voltage and the determined panel current, and controlling the power source voltage according to the feedback voltage to supply the controlled power source voltage to each of the plurality of light emitting elements.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: November 19, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jung-Keun Ahn
  • Patent number: 8587507
    Abstract: A driving circuit includes a pair of operational amplifiers, one producing an analog voltage output of positive polarity, the other producing an analog voltage output of negative polarity. An output switching circuit interchanges these outputs between a pair of data lines. One or both of the operational amplifiers includes a parasitic diode having one terminal connected to the output terminal of the operational amplifier and another terminal normally connected to a power supply voltage of the operational amplifier. When the output of the operational amplifier is switched, a protective switching circuit temporarily disconnects the parasitic diode from the power supply of the operational amplifier and instead connects it to a power supply line carrying a voltage high enough, or low enough, to ensure that the parasitic diode is not forward biased by the existing voltage on the data line to which the output is switched.
    Type: Grant
    Filed: June 21, 2011
    Date of Patent: November 19, 2013
    Assignee: Oki Semiconductor Co., Ltd.
    Inventors: Hideaki Hasegawa, Atsushi Hirama, Koji Higuchi
  • Patent number: 8581812
    Abstract: An organic light emitting display device includes a display region including first sub-pixels, second sub-pixels and third sub-pixels at crossing regions of scan lines and data lines and arranged in a repeating pattern, the first, second and third sub-pixels for emitting light of different colors, a scan driver for supplying scan signals to the scan lines; a data driver for supplying data signals to the data lines; and a data distributor between the data driver and the data lines for distributing the data signals from output lines of the data driver to the data lines. Ones of the first and second sub-pixels are alternately arranged in a first column, and ones of the third sub-pixels are arranged in a second column adjacent to the first column.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: November 12, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Won-Kyu Kwak, Dong-Wook Park
  • Patent number: 8581822
    Abstract: A method for driving a liquid crystal display device provides sufficient charge time for a pixel unit by adjusting a main-charge time and a precharge time of the pixel unit according to the polarities of data driving signals applied during a main-charge period and a precharge period. Meanwhile, the method controls a write period during which a data driving signal is written into a pixel unit, so that each pixel unit can be equally charged.
    Type: Grant
    Filed: June 28, 2010
    Date of Patent: November 12, 2013
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Hui-Ping Chuang, Yi-Jui Huang, Tsan-Ming Hsieh, Chun-Chieh Yu
  • Patent number: 8581807
    Abstract: Disclosed herein is a display device including a pixel array section having pixel circuits arranged in a form of a matrix, the pixel circuits each including a driving transistor for generating a driving current, an electrooptic element connected to an output terminal of the driving transistor, a storage capacitor for retaining information corresponding to signal amplitude of a video signal, and a sampling transistor for writing the information corresponding to the signal amplitude to the storage capacitor; a vertical scanning section configured to generate a vertical scanning pulse for vertical scanning of the pixel circuits; a horizontal scanning section configured to supply the video signal to the pixel circuits so as to coincide with the vertical scanning in the vertical scanning section; and a driving signal constancy achieving circuit for holding the driving current constant.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: November 12, 2013
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 8581894
    Abstract: An output circuit includes a differential amplifier circuit, an output amplifier circuit, a control circuit. The third power supply voltage is intermediate between the first and second power supply voltages. The differential amplifier circuit includes, between the first and second power supplies, a differential input stage, first and second current mirror and first and second junction circuits. The output amplifier circuit includes first and second transistors connected between the first and third power supplies. The control circuit includes a third transistor connected between the output of the second current mirror and an end of the second junction circuit and supplied with a bias signal having a voltage in accordance with the third power supply voltage.
    Type: Grant
    Filed: August 5, 2011
    Date of Patent: November 12, 2013
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroshi Tsuchi
  • Patent number: 8576187
    Abstract: The present invention, in one aspect, relates to a touch sensing device. In one embodiment, the touch sensing device includes a plurality of touch modules spatially arranged in a form of a matrix having a plurality of rows and a plurality of columns, and a plurality of GOAs configured to receive a clock signal. Each GOA has an input for receiving a driving signal and an output for responsively outputting a delayed driving signal by a time interval to a respective touch module. The plurality of GOAs is spatially arranged in a form of a matrix such that each GOA is disposed adjacent to and associated with a corresponding touch module.
    Type: Grant
    Filed: November 8, 2010
    Date of Patent: November 5, 2013
    Assignee: AU Optronics Corporation
    Inventors: Ku-Liang Lin, Wen-Kai Shih, Sheng-Liang Hsieh
  • Patent number: 8570264
    Abstract: A liquid crystal display with an improved reference viewing angle is presented. A pixel electrode includes first and second sub-pixel electrodes. A first switching device is connected to the first sub-pixel electrode, one of gate lines, and one of the data lines. A voltage of the second sub-pixel electrode relative to a predetermined voltage is lower than a voltage of the first sub-pixel electrode relative to the predetermined voltage, and an area of the first sub-pixel electrode is smaller than that of the second sub-pixel electrode.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: October 29, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-Gyu Kim, Sang-Soo Kim
  • Patent number: 8570257
    Abstract: A display device that may be controlled to be reduced in power consumption, a method of driving the display device, and an electronic device having the display device are provided. The display device includes: a display section including a display region in which a plurality of display pixels are arranged two-dimensionally, the display pixels having first light emitting elements, and a non-display region in which one or multiple adjustment pixels are arranged, each adjustment pixel having a second light emitting element; and a drive section driving each display pixel based on a video signal, and driving the adjustment pixel based on a fixed signal. The drive section applies a power-supply voltage, having a value corresponding to voltage variation in the second light emitting element when the second light emitting element emits light, to each display pixel.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: October 29, 2013
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8570258
    Abstract: An organic light emitting display capable of reducing power consumption in a standby mode and a method of driving the same. The organic light emitting display includes a pixel unit having a first emission region and a second emission region, wherein the pixel unit is configured to generate a driving current in accordance with data signals and scan signals to emit light so that light is emitted by the pixel unit only in the first emission region in a standby mode, a data driver for transmitting the data signals only to the first emission region in the standby mode, a scan driver for outputting the scan signals, and a power source supplier for generating and outputting voltages of an initialization power source and for blocking the driving current from flowing to the second emission region by utilizing a voltage of the initialization power source in the standby mode.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: October 29, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung-Un Park, Sung-Cheon Park, Wook Lee
  • Patent number: 8570255
    Abstract: A pixel includes a light emitting element and a driving element connected to the light emitting element. After an initial voltage is applied to one end of a current path of the driving element via the signal line, the pixel driving device acquires the threshold voltage of the driving element based on a voltage value at a terminal of the signal line when the initial voltage is cut off and the relaxation time is elapsed. The voltage-current characteristics of the driving element is acquired based on the voltage value at the terminal of the signal line when the current flows into the current path of the driving element via the signal line. The current gain value of the driving element is acquired based on the threshold voltage of the driving element. The image data is corrected based on the acquired threshold voltage.
    Type: Grant
    Filed: March 30, 2010
    Date of Patent: October 29, 2013
    Assignee: Casio Computer Co., Ltd.
    Inventors: Manabu Takei, Jun Ogura, Shunji Kashiyama, Tsuyoshi Ozaki
  • Patent number: 8570269
    Abstract: Disclosed is a technology for implementing a high contrast ratio that cannot be implemented by only an analog dimming or burst dimming method, by selectively turning off lamps on the LCD device, comprising: a control unit outputting control signals and video data for controlling a driving of a gate driving unit and a data driving unit, and brightness control signals; the gate driving unit for supplying scan signals to gate lines on a liquid crystal panel by controlling of the control unit and the data driving unit for supplying a data voltage to data lines; the liquid crystal panel having liquid crystal cells arranged in a matrix type and thin film transistors formed at each intersection between the data lines and the gate lines; a backlight driving unit for controlling an optical amount by controlling a tube current supplied to lamps on a backlight unit and for selectively turning off the lamps when the brightness control signals are inputted; and the backlight unit for implementing a high brightness with re
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: October 29, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hyeon-Seung Kim, Jong-Ho Lim