Patents Examined by Kwang-Su Yang
  • Patent number: 10446109
    Abstract: A display driver includes: a plurality of decoders that converts a plurality of pixel data pieces representing luminance levels for pixels into gradation voltages having magnitudes corresponding to the luminance levels represented by the pixel data pieces, respectively; a plurality of amplifiers that provides a plurality of driving voltages obtained by amplifying the gradation voltages to a plurality of data lines of a display device, respectively; and a reference gradation voltage generator that generates a plurality of reference gradation voltages having respective different voltage values corresponding to gradation levels. Each of the decoders includes a short-circuiting control circuit that controls whether to short-circuit between a first line and a second line of each of the decoders.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: October 15, 2019
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Kenichi Shiibayashi
  • Patent number: 10446094
    Abstract: The present disclosure provides a gate driver on array (GOA) circuit, where the GOA circuit includes a GOA driving chip, a GOA driving signal line, an array substrate test chip, a test signal line, and a GOA protecting circuit. The GOA driving chip is used to generate a scan driving signal. The GOA driving signal line is used to transmit the scan driving signal to a corresponding scan line. The array substrate test chip is used to generate an array substrate test signal. The test signal line is used to transmit the array substrate test signal to the corresponding scan line. The GOA protecting circuit is arranged between the GOA driving signal line and the test signal line.
    Type: Grant
    Filed: August 19, 2016
    Date of Patent: October 15, 2019
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Guanghui Hong, Gui Chen, Qiang Gong
  • Patent number: 10429992
    Abstract: A display device may include the following elements: a touch screen unit (or touch-sensing unit) operating with a preset touch driving frequency; a display unit operating with a display driving frequency corresponding to a driving control signal; a noise analyzer determining a frequency band of a panel noise based on a feedback signal provided from the display unit, wherein the panel noise is caused by operation of the display unit; and a driving frequency controller controlling the display driving frequency such that the frequency band of the panel noise avoids the touch driving frequency.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: October 1, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventor: Ho Yong Jung
  • Patent number: 10416796
    Abstract: A display device including a display panel and a touch panel is provided. At least one of the display panel and the touch panel is made of a flexible material. The display device is capable of being switched between a first usage state where a portion of the touch panel overlaps a portion of the display panel so that a touch operation is capable of being performed, through the touch panel, on at least a portion of an image displayed on the display panel, and a second usage state where the display panel is located at a side of the touch panel and does not overlap the touch panel and a button pattern is formed on the touch panel through which an operation is performed on the image displayed on the display panel.
    Type: Grant
    Filed: February 18, 2016
    Date of Patent: September 17, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Song Song
  • Patent number: 10409486
    Abstract: A method for controlling a display of an electronic device, comprising: detecting a first input; and dividing the display of the electronic device into at least a main screen area, a left-edge area, and a right-edge area based on the first input.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: September 10, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byungjin Kang, Namhoi Kim, Seongwoong Park, Do-Hyung Lee
  • Patent number: 10410570
    Abstract: The present disclosure relates to the technical field of LED display screens, and in particular, to an LED display device and a method for driving the same. The driving method includes: generating a grayscale data in accordance with an image to be displayed; generating a control signal in accordance with the grayscale data, wherein the control signal includes a plurality of subframe signals each having a duration corresponding to a respective subframe display time; and controlling the corresponding LED lamps to be turned on or off by use of the subframe signals in each subframe of the frame cycle. The frame cycle includes reset time periods separating the successive subframes from each other. The order of the plurality of subframes in the frame cycle can be adjusted by use of the grayscale data.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: September 10, 2019
    Assignee: Chipone Microelectronics Technology (Hefei) Co.
    Inventors: Yongsheng Tang, Yong Wang, Haifeng Liu, Xingbo Gao
  • Patent number: 10403211
    Abstract: An organic light emitting display device includes pixels, a sensor configured to extract at least one of deviation information of first transistors of the pixels and deterioration information of OLEDs of the pixels in a sensing period, and a converter configured to change a bit of first data input from the outside by using at least one of the deviation information and the deterioration information, and to generate second data, wherein a pixel at an ith horizontal line includes an OLED, a first transistor configured to control an amount of a current that flows from a first power source via the OLED in response to a voltage of a first node, second and third transistors configured to turn on when a scan signal is supplied to an ith scan line, and a fourth transistor configured to turn on when a control signal is supplied to an ith control line.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: September 3, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai Jung In, Dong Gyu Kim, Bo Yong Chung
  • Patent number: 10403191
    Abstract: An LED display device and a method for driving the same are disclosed. The LED display device includes a plurality of pixel units being coupled to the row and column lines. In each of the row periods, the method comprises: displaying a display data in a manner of packet-by-packet; and pre-charging the parasitic capacitors between the row and column line by use of a reset voltage to implement a reset between the successive groups. According to the disclosure, a reset is performed between the packets in each row period to reduce the interference to the low grayscale image by the high grayscale image, such that the dynamic display quality of the image is improved.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: September 3, 2019
    Assignee: Chipone Technology (Beijing) Co., LTD
    Inventors: Yongsheng Tang, Yong Wang, Xingbo Gao, Haifeng Liu
  • Patent number: 10379684
    Abstract: A touch screen including a substrate that includes an active area and a non-active area adjacent to the active area, the active area including at least one fingerprint recognition area; touch sensing electrodes including first sensing electrodes arranged in the active area, and at least one second sensing electrode arranged in the fingerprint recognition area, the second sensing electrode configured for sensing a touch and recognizing a fingerprint; and a pad portion provided with a plurality of pads which are electrically connected to respective sensing electrodes, wherein the at least one second sensing electrode includes: a plurality of sub electrodes extending in a direction inclined with respect to an edge portion of the active area; and a plurality of fingerprint recognition lines connecting the sub electrodes to the pad portion, and the fingerprint recognition lines arranged in a same fingerprint recognition area extend in a same direction.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: August 13, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Soon Sung Ahn, Hyoung Wook Jang, Hyun Jae Na, Mu Gyeom Kim
  • Patent number: 10366662
    Abstract: An image display apparatus is disclosed. The image display apparatus includes a panel, a plurality of light sources to output light to the panel, a plurality of switching elements to switch the light sources, and a processor to control the switching elements, wherein the processor controls a current having a variable level to flow into each light source string among the light sources, based on local dimming data, thereby improving contrast in displaying images.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: July 30, 2019
    Assignee: LG ELECTRONICS INC.
    Inventors: Byunghyun An, Hyungoon Kim, Kanghyun Yoon, Gwangmi Go
  • Patent number: 10360865
    Abstract: A gate driving circuit includes a plurality of stages to provide gate signals to gate lines of a display panel. At least one of the stages includes an input circuit receiving a carry signal from a previous stage. A first output circuit outputs a first clock signal as a gate signal. The second output circuit outputs the clock signal as a carry signal. The discharge hold circuit delivers the clock signal to a node based on the clock signal and discharges the node as a second voltage based on the carry signal. The pull down circuit discharges the gate signal as a first voltage based on a signal of the node and a succeeding carry signal from a succeeding stage and discharges another node and the carry signal as the second voltage. The switching circuit delivers the carry signal from the previous stage based on a second clock signal.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: July 23, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jonghee Kim, Kyoungseok Son, Kyoungju Shin
  • Patent number: 10354602
    Abstract: A method of driving a display panel includes outputting a gate signal to the display panel, varying a slew rate of a data voltage to be output to the display panel according to a position in the display panel at which the data voltage is to be applied, outputting the data voltage having the varied slew rate to the display panel, and displaying a grayscale on the display panel in response to the gate signal and the data voltage having the varied slew rate.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: July 16, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyunsik Hwang, Yoongu Kim, Bongim Park, Byungkook Sim, Ikhyun Ahn
  • Patent number: 10354588
    Abstract: A driving method for a pixel circuit comprises steps of: receiving a data control signal inputted by a driving chip and resetting a data line of a pixel unit according to the data control signal; charging the pixel unit to a target voltage according to the data line control signal; and receiving a control signal to control the pixel unit to display a corresponding grayscale level according to the target voltage. Through above way, the present invention can prevent a wrong charging which will generate an abnormal picture display.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: July 16, 2019
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd
    Inventor: Shijuan Yi
  • Patent number: 10347693
    Abstract: A pixel arrangement structure of an OLED display is provided. The pixel arrangement structure includes: a first pixel having a center coinciding with a center of a virtual square; a second pixel separated from the first pixel and having a center at a first vertex of the virtual square; and a third pixel separated from the first pixel and the second pixel, and having a center at a second vertex neighboring the first vertex of the virtual square.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: July 9, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Shin Lee
  • Patent number: 10345983
    Abstract: An inputting apparatus of the electromagnetic induction type may provide a transmission signal of a sufficient signal level to a position indicator. A process controlling unit controls a selection circuit on the basis of a reception state of a reception signal received by each of a plurality of electrodes and detected by a reception signal processing circuit such that a first signal for transmitting a transmission signal is supplied to a first electrode at which the reception signal indicates the highest signal level. Further, the process controlling unit controls the selection circuit such that a second signal is supplied to a second electrode at which the signal level of the reception signal is lower than a predetermined signal level. Consequently, signals can be transmitted to a position indicator from both the first electrode, which most receives the signal from the position indicator, and the second electrode spaced from the first electrode.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: July 9, 2019
    Assignee: WACOM CO., LTD.
    Inventors: Takeshi Kobori, Yoshihisa Sugiyama
  • Patent number: 10347177
    Abstract: The present invention provides a pixel driving circuit, a driving method thereof, and a display device. The pixel driving circuit of the present invention comprises a data writing unit, a threshold compensation unit, a driving unit, a light-emitting unit, and a voltage stabilizing unit; the data writing unit is connected with a first node, a scan signal line and a data signal line; the first node is a connection node between the data writing unit and the driving unit; the threshold compensation unit is connected with the first node, a first control signal line, a first voltage terminal and the driving unit; the driving unit is connected with the light-emitting unit; and the voltage stabilizing unit is connected with the data writing unit, a second control signal line and the first voltage terminal.
    Type: Grant
    Filed: May 31, 2016
    Date of Patent: July 9, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yuting Zhang, Feng Liao, Zhongyuan Wu, Pan Xu
  • Patent number: 10318087
    Abstract: A touch display panel and a method for driving the same are provided. The touch display panel includes a first substrate, multiple electrodes, a touch display circuit, multiple first leads, a common lead, multiple second leads, and multiple switches, where the multiple first leads each are connected with an electrode and each extend from the electrode in a direction towards the touch display circuit, the multiple second leads each are connected with an electrode and each extend from the electrode in a direction away from the touch display circuit, the multiple electrodes each are electrically connected with the touch display circuit through one of the multiple first leads and are electrically connected with the common lead through one of the multiple second leads, and the multiple switches each are disposed between one of the multiple second leads and the common lead.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: June 11, 2019
    Assignees: SHANGHAI AVIC OPTO ELECTRONICS CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventor: Huijun Jin
  • Patent number: 10319287
    Abstract: A method for operating a bidirectional display comprising a substrate, on which a display array consisting of a multiplicity of light-generating image elements and a sensor array consisting of a multiplicity of light-detecting elements are formed, each light-detecting element being assigned at least one light-generating image element, and each light-detecting element having at least a photodetector, a reset switch, a transfer switch, a memory and a select switch. The exposure phase of a light-detecting element between two successive readout phases of the light-detecting element is in this case subdivided into at least two exposure subphases chronologically separated from one another, and the at least one light-generating image element assigned to the light-detecting element is activated at least temporarily between the two exposure subphases of the light-detecting element.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: June 11, 2019
    Assignee: FRAUNHOFER-GESELLSCHAFT ZUR FĂ–RDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Bernd Richter, Phillipp Wartenberg
  • Patent number: 10290263
    Abstract: A circuit configured to sense a threshold voltage of an organic light emitting diode (OLED) of a display panel includes a sample and hold unit configured to receive the threshold voltage of the OLED, a first sampling capacitor between the first input terminal and a first reference voltage, and a first charge sharing capacitor having a first terminal connected to the first sampling capacitor and a second terminal connected to a second reference voltage, a second sample and hold unit including a second input terminal connected to the first reference voltage, a second sampling capacitor between the second input terminal and the first reference voltage, and a second charge sharing capacitor having a first terminal connected to the second sampling capacitor and a second terminal connected to a third reference voltage, and an amplifier including first and second amplifier input terminals connected to the first and second output terminals, respectively.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: May 14, 2019
    Assignee: DB HiTek Co., Ltd.
    Inventor: Tae Ho Hwang
  • Patent number: 10276094
    Abstract: A pixel driving circuit, a driving method and an organic light-emitting display panel are provided. The pixel driving circuit includes: a first transistor, a second transistor, a third transistor, a fourth transistor and a fifth transistor, a sixth transistor, a seventh transistor and an eighth transistors, and a capacitor. A first node is present between the fourth transistor and the fifth transistor. The seventh transistor is coupled between a reference voltage line and the first node, and the eighth transistor is coupled between the reference voltage line and an anode of the light-emitting element.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: April 30, 2019
    Assignees: Shanghai Tianma AM-OLEO Co., Ltd., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Dongxu Xiang, Yue Li, Dong Qian, Gang Liu, Renyuan Zhu, Tong Wu, Zeyuan Chen