Patents Examined by Van N Chow
  • Patent number: 11776478
    Abstract: An electroluminescent display device includes a display panel including a display region, which includes a plurality of pixel arrangement regions and a plurality of scan circuit regions between the plurality of pixel arrangement regions, and a non-display region around the display region; a scan driving circuit formed in the plurality of scan circuit regions, and a clock signal line transferring a clock signal, and a first voltage line and a second voltage line located at both sides of the clock signal line, the clock signal line and the first and second voltage lines being located in the scan circuit region, wherein the first voltage line transfers a low potential driving voltage which is supplied to a cathode corresponding to the display region.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: October 3, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Eui-Hyun Chung, Sung-Hun Kim, Da-Hye Shim, Soon-Hwan Hong
  • Patent number: 11776443
    Abstract: There is provided a gate driving circuit including cascaded Gate Driver On Array (GOA) units, each GOA unit drives a row of pixels and includes a starting sub-unit, an output sub-unit and an output terminal, in the GOA unit at a first stage, the starting sub-unit is coupled with a starting signal, a first control signal, a second control signal and a constant voltage potential, and the output sub-unit is coupled with a first clock signal and a first power supply signal; in the GOA unit at an nth stage, the starting sub-unit is coupled with the starting signal, the first control signal, the second control signal and the output terminal of the GOA unit at an (n?1)th stage, the output sub-unit is coupled with the first power supply signal and the output terminal of the GOA unit at an (n+1)th stage, n is an integer greater than 1.
    Type: Grant
    Filed: April 8, 2020
    Date of Patent: October 3, 2023
    Assignees: Ordos Yuansheng Optoelectronics Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Jing Zhao, Xu Su, Shuang Zhao, Jigang Sun
  • Patent number: 11763718
    Abstract: The present application provides a GOA circuit and an array substrate. The GOA circuit includes a plurality of cascaded gate driving units, wherein an N-th level gate driving unit includes an inversion module, and a portion of a clock signal can be output from an output terminal of the inversion module. Since a frequency of the clock signal is much higher than a frequency of a low-frequency control signal, a duration during which an output signal of the inversion module is kept at a same potential is reduced.
    Type: Grant
    Filed: May 27, 2022
    Date of Patent: September 19, 2023
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD
    Inventors: Hui Yang, Fan Yang
  • Patent number: 11756467
    Abstract: A display panel and a display device are provided. The display panel includes a driving circuit. The driving circuit includes N-level shift registers cascaded with each other, where N is greater than or equal to two. the display panel further includes a first voltage signal line, providing a first voltage signal for the driving circuit; a second voltage signal line, providing a second voltage signal for the driving circuit; a third voltage signal line, providing a third voltage signal for the driving circuit; and a fourth voltage signal line, providing a fourth voltage signal for the driving circuit. At least one of the third voltage signal line and the fourth voltage signal line is disposed on a side of at least one of the first voltage signal line and the second voltage signal line facing toward a display region of the display panel.
    Type: Grant
    Filed: July 1, 2022
    Date of Patent: September 12, 2023
    Assignee: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Qingjun Lai, Yihua Zhu
  • Patent number: 11749221
    Abstract: Disclosed are a driving method of an array substrate and an array substrate. The driving method of the array substrate controls a data drive signal line to output a first polarity data drive signal in a first time period and output a second polarity data drive signal in a second time period alternately. In the first time period, the first polarity data drive signal is output to drive the first sub-pixels of each pixel group to make the first sub-pixel of each pixel group to be a first polarity. In the second time period, the second polarity data drive signal is output to drive the second sub-pixel of each pixel group to make the second sub-pixel of each pixel group to be a second polarity. Polarities of sub-pixels of each column are the same.
    Type: Grant
    Filed: July 29, 2022
    Date of Patent: September 5, 2023
    Assignees: BEIHAI HKC OPTOELECTRONICS TECHNOLOGY CO., LTD., HKC CORPORATION LIMITED
    Inventors: Chih Tsung Kang, Haijiang Yuan
  • Patent number: 11749226
    Abstract: An embodiment of the present application provides a source driver chip and a display device. Specifically, the source driver chip includes a first pre-charging module for pre-charging first data lines to a first preset voltage and pre-charging second data lines to a second preset voltage when a voltage of a first data signal is greater than a preset reference voltage.
    Type: Grant
    Filed: September 3, 2020
    Date of Patent: September 5, 2023
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Jinfeng Liu
  • Patent number: 11741872
    Abstract: A GOA circuit and a display panel are provided. The GOA circuit includes a first pull-down module for pulling down a voltage level of a current-stage gate driving signal, a second pull-down module for pulling down a voltage level of the first node, a third pull-down module for pulling down a voltage level of the second node, and a fourth pull-down module for pulling down the voltage level of the current-stage gate driving signal. The GOA circuit raises the effect of pulling down the current-stage gate driving signal.
    Type: Grant
    Filed: June 23, 2020
    Date of Patent: August 29, 2023
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Jian Tao, Yue Wang, Yafeng Li
  • Patent number: 11735135
    Abstract: The flicker performance manager disclosed herein implements a method including measuring a liquid crystal (LC) common voltage (VCOM) over a predetermined period of operation an LCD panel having a plurality of LCs, determining a shift in the VCOM (VCOM shift) over the predetermined period based at least in part on the measured VCO, storing the VCOM shift as a function of time in a table of an embedded controller, receiving a power-on signal for the LCD panel and adjusting a VCOM reference level applied to the LCs based at least in part on the stored values of the VCOM shift.
    Type: Grant
    Filed: May 28, 2021
    Date of Patent: August 22, 2023
    Assignee: Microsoft Technology Licensing, LLC
    Inventor: Guo Sheng Chen
  • Patent number: 11727842
    Abstract: The present disclosure relates to a data-driving device and a system for driving a display device and, more specifically, a data-driving device and a system for reducing power consumption of a display device by reducing a static current of the data-driving device.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: August 15, 2023
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Hee Yoon Jung, Jung Min Choi, Jong Min Park
  • Patent number: 11727882
    Abstract: A pixel includes: a capacitor connected between a first voltage line and a first node; a light emitting diode including a first electrode connected to a second node, and a second electrode connected to a second voltage line; a first transistor; a second transistor; a third transistor including a first electrode connected to the first node, a second electrode connected to the second node, and a gate electrode to receive a first scan signal; a fourth transistor including a first electrode connected to the first node, a second electrode connected to a third voltage line to receive a third voltage, and a gate electrode to receive a second scan signal; and a compensation transistor including a first electrode connected to the first node, a second electrode connected to a fourth voltage line to receive a compensation voltage, and a gate electrode to receive a compensation control voltage.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: August 15, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hanbit Kim, Meejae Kang, Keunwoo Kim, Doo-Na Kim, Sangsub Kim, Do Kyeong Lee, Jaehwan Chu
  • Patent number: 11716082
    Abstract: A capacitive touch sensor is disclosed for use with input signal. The capacitive touch sensor includes a number n of input/output lines. Each of the number n of input/output lines is electrically disconnected from every other of the number n of input/output lines. Each of the number n of input/output lines is arranged to cross every other of the number n of input/output lines. Each of a number ? of positions includes one of the number n of input/output lines crossing another of the number n of input/output lines.
    Type: Grant
    Filed: December 10, 2021
    Date of Patent: August 1, 2023
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Zhang Jun, Shen Ge, Xu Kang Cheng, Zhou Yi, Hao Meng, Ji Ru Jun
  • Patent number: 11715436
    Abstract: In a GOA circuit provided by the present disclosure, a unidirectional feedback circuit is adopted between a first node and a second node of the GOA circuit of the present disclosure, which can reduce complexity of circuit design, make it easier to achieve linear design and in-plane integration, prevent point competition of the first node and the second node, and improve stability of the circuit.
    Type: Grant
    Filed: March 15, 2021
    Date of Patent: August 1, 2023
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chao Tian, Haiming Cao
  • Patent number: 11710434
    Abstract: In a display device, transistors are disposed on a display panel. When the display panel has a short-circuit, the timing controller sends a signal to the level shifter to disconnect the transistors, causing the display panel to no longer receive scanning signals transmitted from GOA circuits, causing the display panel enter an overcurrent protection state, and thus preventing GOA wirings in the display panel from burning out in an event of the short-circuit.
    Type: Grant
    Filed: April 24, 2020
    Date of Patent: July 25, 2023
    Assignee: TCL China Star Optoelectronics Technology Co., Ltd.
    Inventor: Xiaoli Fu
  • Patent number: 11699399
    Abstract: A scan driver including a plurality of scan stages. A first scan stage among the plurality of scan stages includes first-to-sixth transistors and a first capacitor. The first transistor is connected to a first Q node, a first scan clock line, and a first scan line. A second transistor is connected to a first scan carry line and the first Q node. A third transistor is connected to a first sensing carry line and a second sensing carry line. A fourth transistor is connected to a first control line and the third transistor. A fifth transistor is connected to the fourth transistor, a second control line, and a first node. A first capacitor is connected to the fifth transistor. A sixth transistor is connected to a third control line, the first node, and the first Q node.
    Type: Grant
    Filed: January 17, 2022
    Date of Patent: July 11, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong Hee Kim, Tak Young Lee, Bo Yong Chung, Yang Hwa Choi
  • Patent number: 11698563
    Abstract: A liquid crystal writing device is erased by a stylus. The liquid crystal writing device includes a liquid crystal layer including cholesteric liquid crystal material. A user applies pressure to a flexible substrate that changes reflectivity of the cholesteric liquid crystal material to form images on the liquid crystal writing device. The liquid crystal layer is disposed between electrically conductive layers. Writing device terminals are electrically conductive and connected to the electrically conductive layers. The stylus includes stylus electronics adapted to apply an erase voltage or erase voltage waveform to the writing device terminals.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: July 11, 2023
    Assignee: Kent Displays, Inc.
    Inventors: Todd Ernst, Nathan Hirt, Bryan Owen, Clinton Braganza, Hunter Morris
  • Patent number: 11687234
    Abstract: A computer system including an electronic device and an input device is disclosed. The electronic device includes a touch display area and a control unit. The input device includes a plurality of positioning structures and a grounding piece. The positioning structures are electrically connected to the grounding piece. When the input device is disposed on the touch display area of the electronic device, the control unit detects positions of the positioning structures on the touch display area, calculates a coverage area covered by the input device on the touch display area according to the positions, and determines a range of a display area of the touch display area according to the coverage area.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: June 27, 2023
    Assignee: ASUSTEK COMPUTER INC.
    Inventors: Ching-Fu Hsu, Wei-Ting Wong, Teng-Hui Huang
  • Patent number: 11682330
    Abstract: In a GOA circuit and a display panel provided by embodiments of the present application, a reset module is provided in each level of GOA units, so that each level of the GOA units can output a high potential before an end of a frame, all gates in a display area are turned on, and a charge of all pixels in the display area is discharged; after that, each level of the GOA units outputs a low potential, and all of the gates in the display area are set to the low potential.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: June 20, 2023
    Inventor: Jian Tao
  • Patent number: 11676522
    Abstract: A display panel and a display device are provided. A shift register of the display panel includes a first control unit, configured to receive an input signal and control a signal of a first node in response to a first clock signal; a second control unit, configured to receive a first voltage signal and control a signal of a second node in response to the input signal and the first clock signal; a third control unit, configured to receive the first voltage signal and a second voltage signal and control a signal of a fourth node in response to the signal of the second node and a signal of a third node; and a fourth control unit, configured to receive a third voltage signal and a fourth voltage signal and generate an output signal in response to the signals of the second node and the fourth node.
    Type: Grant
    Filed: October 21, 2021
    Date of Patent: June 13, 2023
    Assignee: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Qingjun Lai, Yihua Zhu, Yong Yuan, Ping An, Zhaokeng Cao
  • Patent number: 11670216
    Abstract: A digital-to-analog conversion circuit, a data driver including the same, and a display device are provided. The circuit includes: a reference voltage generation part, generating a reference voltage group having different voltage values; a decoder, selecting and outputting multiple reference voltages with overlapping from the reference voltage group based on the digital data signal; an amplification circuit, where m (m being an integer of 1 or more and less than x) of first to xth input terminals respectively receive m of multiple reference voltages, and, as an output voltage, a voltage amplified by averaging the voltages respectively received by the first to xth input terminals with predetermined weighting ratios is output; and a selector, which, in a first selection state, supplies the output voltage to (x-m) input terminals among the first to xth input terminals, and in a second selection state, supplies the reference voltages to the (x-m) input terminals.
    Type: Grant
    Filed: July 19, 2021
    Date of Patent: June 6, 2023
    Assignee: LAPIS Semiconductor Co., Ltd.
    Inventor: Hiroshi Tsuchi
  • Patent number: 11663990
    Abstract: A display apparatus which includes a driver with low power consumption and in which an output voltage of the driver is boosted by a pixel is provided. The source driver in which a logic unit and an amplifier unit operate appropriately by the same low voltage is included, and the pixel has a function of retaining first data, a function of adding second data to the first data to generate third data, and a function of supplying the third data to a display device. Thus, even when a voltage output from the source driver is low, the voltage can be boosted by the pixel; accordingly, the display device can operate appropriately.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: May 30, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kouhei Toyotaka, Motoharu Saito