Patents Examined by Navin Lingaraju
  • Patent number: 9721521
    Abstract: The present disclosure discloses a gate driving method, a driving apparatus of a display panel and a display apparatus. The driving apparatus may be in two driving modes, i.e., a first mode and a second mode. In the first mode, due to a reduced number of gate lines to be driven when various frames of images are displayed, the power consumption can be reduced. In addition, due to the effect of persistence of vision of human eyes, better quality of display images can be ensured while reducing power consumption. In the second mode, as respective lines of gate lines are driven progressively when various frames of images are displayed, the display panel is enabled to have better quality of display images. By switching the driving apparatus between the first mode and second mode, a number of gate lines to be driven can be reduced so as to reduce power consumption.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: August 1, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xue Jiang, Xinghua Li, Wei He
  • Patent number: 9721510
    Abstract: A gate driving unit includes an input circuit, a pull-up circuit, a reset circuit, and an output circuit. The pull-up driving signals received by the input circuit include the gate driving signals for pixel units of row n?2 and row n+4. The reset driving signals received by the reset circuit include the gate driving signals for pixel units of row n+2 and row n+8. The gate driving signals output from the output circuit include the gate driving signals for pixel units of row n and row n+6. Where, n is a positive integer and n?[3,?). The gate driving unit can output gate driving signals of two rows of pixel units and thus has a high service efficiency. An area occupied by a gate driving circuit made of the gate driving units is reduced, and a driving efficiency of the gate driving circuit is increased.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: August 1, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Xiangyang Xu
  • Patent number: 9711084
    Abstract: An organic EL display device includes a first pixel circuit for displaying a first color. The first pixel circuit includes a large light emitting element, a small light emitting element, and a current control circuit that controls whether a current is supplied to the small light emitting element and the large light emitting element or not respectively, and the amount of the current to be supplied to at least one of the small light emitting element and the large light emitting element, according to a tone to be displayed by the first pixel circuit. The current control circuit supplies the current to the small light emitting element if the tone is equal to or smaller than a threshold value, and supplies the current to at least the large light emitting element if the tone is larger than the threshold value.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: July 18, 2017
    Assignee: Japan Display Inc.
    Inventor: Naoki Uetake
  • Patent number: 9685106
    Abstract: Disclosed are a curved display device and a driving method therefor. The curved display device includes: a display panel including a curved portion and a flat portion; a luminance compensator configured to determine a first luminance compensating value for the flat portion and to determine a second luminance compensating value for one or more positions of the curved portion; and a signal controller for adjusting an input image signal corresponding to the first and second luminance compensating values set by the luminance compensator so as to compensate luminance of those portions of the input image signal corresponding to both the curved portion and the flat portion of the display panel, and for transmitting the compensated image signal to the display panel.
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: June 20, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventor: Ui Yeong Cha
  • Patent number: 9674905
    Abstract: A display apparatus including: a display; a driver including an amplifier configured to detect a current of the display and to generate a constant current control signal, and a transistor configured to adjust the current supplied to the display in accordance an output voltage of the amplifier; and a controller configured to monitor the current of the display and a dropout voltage of the transistor, and control the amplifier so that a pulse width modulation (PWM) duty ratio is decreased in response to the dropout voltage being equal to or higher than a reference voltage.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: June 6, 2017
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin-hyung Lee, Youn-seung Lee, Gil-yong Chang
  • Patent number: 9664970
    Abstract: Disclosed is an LCD panel. The LCD panel comprises a display area (13), and a first signal line, a second signal line . . . an Nth signal line which are connected to the display area (13), wherein the LCD panel further comprises a TFT area (14). One side of the display area (13) is provided with a first signal output port, a second signal output port . . . an Nth signal output port. The TFT area (13) comprises a first TFT unit, a second TFT unit . . . an (N+1)th TFT unit; and both the first TFT unit and the (N+1)th TFT unit comprise one TFT, and the second TFT unit to the Nth TFT unit respectively comprise two TFTs, i.e. a first TFT and a second TFT. Further disclosed is a display device. By adopting the LCD panel, a circuit of a gate driver can be made to be more simple and occupy less space on the basis of not changing gate signal characteristics.
    Type: Grant
    Filed: October 25, 2013
    Date of Patent: May 30, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Zheng Wang
  • Patent number: 9666134
    Abstract: A scan driving device includes shift registers, each including a first signal terminal to which a forward direction driving start signal is transferred, a second signal terminal to which a backward direction driving start signal is transferred, a clock signal terminal and a clock bar signal terminal to which a clock signal and a clock bar signal are applied, a sustain signal terminal to which a sustain signal is transferred, a control signal terminal to which a control signal is transferred, a gate clock signal terminal to which a gate clock signal is transferred, and an output signal terminal, where driving power source voltages including a high potential power source voltage and low potential power source voltages is applied to each shift register, and an application of the low potential power source voltages to each shift register is controlled based on the sustain signal.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: May 30, 2017
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Woo-Seok Han, Jin-Wook Yang, Yun-Ho Kim
  • Patent number: 9613574
    Abstract: The present disclosure provides an array substrate, a display panel and a display device. The array substrate includes: a plurality of data lines and a plurality of gate lines configured to divide a display region into a plurality of display sub-regions; a pixel electrode arranged at each display sub-region; and a TFT arranged at each display sub-region, a source electrode of the TFT being electrically connected to the data line, a drain electrode thereof being electrically connected to the pixel electrode and a gate electrode thereof being electrically connected to the gate line, wherein a parasitic capacitor is formed between the gate electrode and the drain electrode of the TFT. The array substrate further includes a switch circuit configured to enable both ends of the parasitic capacitor to be electrically connected when a gate driving signal of the TFT is changed from a high level to a low level.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: April 4, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Jieqiong Wang
  • Patent number: 9583066
    Abstract: The present disclosure discloses a gate driving method, a driving apparatus of a display panel and a display apparatus. The driving apparatus may be in two driving modes, i.e., a first mode and a second mode. In the first mode, due to a reduced number of gate lines to be driven when various frames of images are displayed, the power consumption can be reduced. In addition, due to the effect of persistence of vision of human eyes, better quality of display images can be ensured while reducing power consumption. In the second mode, as respective lines of gate lines are driven progressively when various frames of images are displayed, the display panel is enabled to have better quality of display images. By switching the driving apparatus between the first mode and second mode, a number of gate lines to be driven can be reduced so as to reduce power consumption.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: February 28, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., Chengdu BOE Optoelectronics Technology Co., Ltd.
    Inventors: Xue Jiang, Xinghua Li, Wei He
  • Patent number: 9557864
    Abstract: The present invention provides an array substrate, a liquid crystal display device comprising the same, and a method for forming the same. The array substrate comprises a gate line, a data line, a signal line and a pixel electrode formed thereon. The gate line intersects the data line to define a plurality of pixel regions in which the pixel electrodes are formed. Each of the pixel electrodes overlaps the signal line to form a first sensing capacitor and overlaps the gate line to form a second sensing capacitor.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: January 31, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Zheng Wang, Jai-Il Ryu
  • Patent number: 9439266
    Abstract: A light source device includes a light source module having a light-emitting block, an image analysis part, a duty ratio calculation part, a duty ratio determination part and a signal generation part. The image analysis part extracts representative luminance data of the light-emitting block based on pixel data. The duty ratio calculation part calculates duty ratio data of the light-emitting block based on the representative luminance data. The duty ratio determination part generates determined duty ratio data of the light-emitting block based on the duty ratio data from a first period, and the signal generation part generates a driving signal having a duty ratio corresponding to the determined duty ratio data to drive the light-emitting block.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: September 6, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyung-Ku Kang, Hyuk-Hwan Kim, Dae-Gwang Jang, Yu-Han Bae, Hyeon-Yong Jang
  • Patent number: 9384688
    Abstract: A circuit for driving a liquid crystal display includes: a high selection unit turned on by a high selection signal and transferring a high data signal or a common voltage to one side of a storage capacitor; a low selection unit; a high transfer unit connected to one side of the storage capacitor; and a low transfer unit connected to the other side of the storage capacitor, turned on by a low transfer signal and transferring voltage stored at the other side of the storage capacitor to one side of the liquid crystal capacitor or transferring the low data signal or the common voltage transferred by the low selection unit to one side of the liquid crystal capacitor.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: July 5, 2016
    Assignee: RAONTECH INC.
    Inventors: Min-Seok Kim, Jang-Sub Sohn
  • Patent number: 9383867
    Abstract: Multiple sensor electrodes are formed such that they overlap a display panel, and each have an electrostatic capacitance that changes according to the user's touch. Furthermore, a proximity sensor electrode pair is formed as a transparent electrode such that they overlap the display panel. An electrostatic capacitance detection circuit detects change in the electrostatic capacitance of each sensor electrode due to the user's touch, thereby detecting a position touched by the user. A proximity detection circuit detects change in the electric field generated between the proximity sensor electrode pair due to the proximity of the user, thereby detecting the proximity of the user to the display panel. An electrostatic capacitance detection circuit is configured to have at least a component that is switchable between an operating state and a non-operating state. When detecting that the user is in proximity, this component transits from the non-operating state to the operating state.
    Type: Grant
    Filed: November 2, 2010
    Date of Patent: July 5, 2016
    Assignee: ROHM CO., LTD.
    Inventors: Masaya Hirakawa, Shigehide Yano
  • Patent number: 9367184
    Abstract: This invention offers a signal processing circuit of an electrostatic capacity type touch panel which is capable of switching between a differential input mode and a single input mode and has an extended adjustable range of an offset in the single input mode. The signal processing circuit of this invention includes a first sensor circuit of a differential input type, a second sensor circuit of a single input type, a third and fourth electrostatic capacitors that are variable capacitors for calibration to adjust the offset in an output voltage of the first sensor circuit, and a switching control circuit to control so as to put in operation one of the first and second sensor circuits. The switching control circuit also controls so that the third and fourth electrostatic capacitors for calibration are connected in parallel to each other when the second sensor circuit is put in operation.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: June 14, 2016
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Kazuyuki Kobayashi, Yasuhiro Kaneta
  • Patent number: 9336722
    Abstract: A pixel circuit for an organic light emitting display is disclosed. The pixel uses both current and voltage driving methods. A voltage based on an input current and on an input voltage is stored, and current for an organic light emitting diode is generated based on the stored current.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: May 10, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyung-Soo Kim
  • Patent number: 9275590
    Abstract: A liquid crystal display and a driving method thereof are provided. The liquid crystal display includes a liquid crystal display panel, a register for storing pixel information of a problem pattern and polarity pattern information, a block pattern recognition unit for comparing input data with the problem pattern to count the number of problem patterns contained in the input data and comparing the count value with a first threshold value, a line pattern recognition unit for determining the line containing the problem pattern as a problem line, a frame pattern recognition unit for comparing the number of problem lines with a second threshold value, and determining the frame containing the input data as a problem frame, a polarity control signal generating unit for generating vertical and horizontal polarity control signals, and source drive integrated circuits (ICs) for controlling the vertical and horizontal polarities of data voltages supplied to the data lines.
    Type: Grant
    Filed: October 14, 2009
    Date of Patent: March 1, 2016
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Youngho Kim, Suhyuk Jang, Songjae Lee
  • Patent number: 9262017
    Abstract: There is offered a signal processing circuit of the electrostatic capacity type touch panel which can eliminate duplication of components to reduce a cost of the components. A touch panel 51 is formed on a glass substrate 200. Sensor circuits 50A and 50B are arrayed in a Y direction, and sensor circuits 50C and 50D are arrayed in an X direction on the periphery of the touch pane 51. Serial clock terminals SCL of the sensor circuits 50A-50D are connected to a serial clock line 53 all together, while serial data terminals SDA are connected to a serial data line 54 all together. A microcomputer 52 is disposed on a PCB substrate outside the glass substrate 200. Data communication can be performed between the microcomputer 52 and the sensor circuits 50A-50D through the serial clock line 53 and the serial data line 54.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: February 16, 2016
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: Kazuyuki Kobayashi, Tatsuya Suzuki, Kumiko Fukai, Yasuhiro Kaneta
  • Patent number: 9245478
    Abstract: A pixel circuit 110 includes a driving transistor, a light-emitting element, and a voltage limiter circuit. The transistor and the light-emitting element are connected in series between power supply. The transistor allows an electric current that is dependent on a voltage between its gate and source to flow through the light-emitting element. The light-emitting element emits light at a luminance that is dependent on an electric current that flows between two terminals. The voltage limiter circuit performs voltage limiting in such a way as to ensure that a voltage between the drain of the transistor and the source thereof does not exceed a predetermined value.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: January 26, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Takayuki Kitazawa
  • Patent number: 9183781
    Abstract: A stage circuit includes an output unit for outputting the voltage of a first or second power source to a first output terminal, corresponding to a voltage at a first or second node; a bidirectional driver for receiving sampling signals of previous and next stages; a first driver coupled to the bidirectional driver to control the voltages at the first and second nodes, corresponding to first and second clock signals; and a second driver coupled to the bidirectional driver to output a sampling signal corresponding to the first and second clock signals. The first driver includes a first transistor coupled between the first power source and the second node; a second transistor coupled between the second node and the second power source; a third transistor coupled between the bidirectional driver and the first node; and a first capacitor coupled between the second node and a second input terminal.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: November 10, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hwan-Soo Jang
  • Patent number: 9165491
    Abstract: A display device having multiple viewing zones includes a display panel including a plurality of pixels in a matrix form, each pixel including red, green and blue sub-pixels arranged in a vertical direction; and a light guide panel guiding a first image emitted from the pixels in first columns among the plurality of pixels to a first viewing zone and a second image emitted from the pixels in second columns among the plurality of pixels to a second viewing zone, wherein the first column is adjacent to the second column.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: October 20, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Jong-Hoon Woo, Young-Bok Lee