Patents Examined by Lin Li
  • Patent number: 11875727
    Abstract: The present disclosure provides a shift register, a gate driving circuit, a display panel, and a driving method thereof. The shift register includes: an input circuit; an output circuit; a first control circuit configured to provide a potential of a first control signal terminal to a pull-down node, and provide a potential of a reference signal terminal to the pull-down node according to the potential of the pull-up node; and a second control circuit connected to the pull-down node, a second control signal terminal, the output signal terminal, and the reference signal terminal, wherein the second control circuit is configured to pull down a potential of the output signal terminal during a display phase under the control of a potential of the pull-down node and a potential of the second control signal terminal, and pull up the potential of the output signal terminal in a power-off phase.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: January 16, 2024
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhen Wang, Jian Zhang, Jian Sun, Wei Yan, Deshuai Wang, Wenwen Qin, Jiguo Wang, Han Zhang, Yue Shan, Xiaoyan Yang, Yadong Zhang, Shijun Wang, Jiantao Liu
  • Patent number: 11869416
    Abstract: Discussed is a display device including a substrate, semiconductor light-emitting elements on the substrate, flip-flops which can apply an electrical signal to the semiconductor light-emitting elements to maintain the semiconductor light-emitting elements in a light-emitting state for a predetermined time interval, scan electrodes and data electrodes electrically connected to the flip-flops, respectively, and a driver. When a frame synchronization signal is generated during a time interval from a time point of the generation of a sub field signal to a time point of the generation of a subsequent sub field signal, the driver can prevent a voltage from being applied to the data electrodes for the time interval.
    Type: Grant
    Filed: February 17, 2020
    Date of Patent: January 9, 2024
    Assignee: LG ELECTRONICS INC.
    Inventors: Byunghun Park, Sunghwan Kim, Hongkyu Lee
  • Patent number: 11862099
    Abstract: The present disclosure provides a shift register unit, including a detection signal input sub-circuit, a display signal input sub-circuit, an output circuit, a pull-down control circuit and a signal output terminal, the output circuit includes a pull-up sub-circuit and a pull-down sub-circuit, the pull-down control circuit includes a selection sub-circuit and a plurality of pull-down control sub-circuits. The present disclosure further provides a gate driving circuit, a display panel and a driving method for driving the display panel. The shift register unit has a simple structure and a long service life.
    Type: Grant
    Filed: April 27, 2022
    Date of Patent: January 2, 2024
    Assignees: HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xuehuan Feng, Yongqian Li
  • Patent number: 11854475
    Abstract: Disclosed herein is a display device for preventing a luminance floatation phenomenon in a low grayscale region. The display device includes a display panel, an external input interface configured to receive an image signal from an external device, and a controller configured to adjust a gamma value when an input frequency of the image signal is less than an output frequency of the display panel and a variable refresh rate (VRR) function for changing the output frequency according to the input frequency is activated and to output the image signal to the display panel based on the adjusted gamma value.
    Type: Grant
    Filed: April 1, 2022
    Date of Patent: December 26, 2023
    Assignee: LG ELECTRONICS INC.
    Inventor: Youngho Chun
  • Patent number: 11830408
    Abstract: A shift register unit and a method of driving the shift register unit, a gate driving circuit, and a display device. The shift register unit includes: a first shift register configured to generate a first control output signal (CR1) and a second control output signal (CR2) based on a signal at a first clock signal terminal (CLKD); and a second shift register configured to generate a second output signal (OUT2) based on a signal at a third clock signal terminal (CLKE2), wherein a first pull-down node (PD1_1) of the first shift register is connected to a second pull-down node (PD2_2) of the second shift register, and a second pull-down node (PD1_2) of the first shift register is connected to a first pull-down node (PD2_1) of the second shift register.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: November 28, 2023
    Assignees: HEFEI BOE JOINT TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xuehuan Feng, Yongqian Li
  • Patent number: 11830410
    Abstract: The present disclosure provides a gate driving unit, a gate driving method, a gate driving circuit and a display device. The gate driving unit includes a first clock signal end, a second clock signal end, a third clock signal end, a fourth clock signal end, a first output node control circuitry, a second output node control circuitry, a first control node control circuitry and an output circuitry. According to the present disclosure, it is able to provide a gate driving signal for an N-type transistor in an LTPO pixel circuit, and reduce the number of transistors, thereby to provide a narrow bezel.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: November 28, 2023
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Wenqiang Li, Chuntong Jiang, Ling Shi, Yipeng Chen, Shuai Xie
  • Patent number: 11825709
    Abstract: A display device including a transmission area, a display area at least partially surrounding the transmission area, and a non-display area between the transmission area and the display area, in which the display device includes a driving voltage line extending in a first direction and arranged in the display area, a data line extending in the first direction and arranged in the display area, an auxiliary data line connected to the data line and extending along an edge of the transmission area in the non-display area, and a conductive pattern arranged in the non-display area and connected to the driving voltage line.
    Type: Grant
    Filed: April 14, 2021
    Date of Patent: November 21, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sukyoung Kim, Yujin Jeon, Wonkyu Kwak, Changsoo Pyon, Wonse Lee, Donghyeon Jang
  • Patent number: 11790825
    Abstract: A backlight brightness control method, a backlight brightness control device, and a display equipment are provided. By using a constant current integrated circuit to input constant current to backlight sources in backlight partitions, uniformity of backlight brightness is allowed to be improved. By determining a target peak current inputted to the backlight sources in the backlight partitions according to a grayscale level of partition images, not only can the backlight brightness required by a high grayscale level be ensured, but fine adjustment of the backlight brightness under a low grayscale level can also be ensured.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: October 17, 2023
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiong Hu, Yu Wu, Haoran Li
  • Patent number: 11776470
    Abstract: The present invention provides a shift register unit, a driving method, a driving circuit and a driving device. The shift register unit includes a first input circuit, a second input circuit, a control circuit and an output circuit; the first input circuit provides an input signal to a first node and provides a second voltage signal to a third node under control of a second clock signal; the second input circuit outputs a first voltage signal to the third node and controls a potential at a fourth node under control of a potential at the first node and an input control signal; the control circuit provides a first voltage signal to the first node under control of a potential at a fourth node. The present invention provides waveforms for operation of specific pixels.
    Type: Grant
    Filed: August 13, 2021
    Date of Patent: October 3, 2023
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Yingsong Xu
  • Patent number: 11763724
    Abstract: A shift register unit, a method for driving a shift register unit, a gate drive circuit, and a display device are disclosed. A shift register unit includes an input circuit, an output circuit, and a first control circuit. The input circuit controls a level of a first node in response to an input signal. The output circuit outputs at least one clock signal of at least one clock signal terminal to at least one signal output terminal under the control of the level of the first node, and outputs a level of a second node to at least one of the at least one signal output terminal in the case where the first node is at a non-operating potential. The first control circuit controls the level of the second node in response to the level of the first node.
    Type: Grant
    Filed: October 28, 2019
    Date of Patent: September 19, 2023
    Assignees: HEFEI BOE JOINT TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xuehuan Feng, Sixiang Wu
  • Patent number: 11763740
    Abstract: The present disclosure provides a signal generation circuit, a signal generation method, a signal generation module and a display device. The signal generating circuit includes an input terminal, a signal output terminal, a transmission control circuit, a first output circuit, and an output control circuit; the output control circuit is electrically connected to a first output control terminal, a second output control terminal, a second voltage terminal, the signal writing-in terminal, the signal output terminal and the first voltage terminal, configured to control to connect the signal writing-in terminal and the second voltage terminal under the control of a second output control signal provided by the second output control terminal, and control to connect the signal output terminal and the first voltage terminal under the control of a first output control signal provided by the first output control terminal. The present disclosure expands an adjustment range of frequency of a PWM signal.
    Type: Grant
    Filed: April 15, 2021
    Date of Patent: September 19, 2023
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Guangliang Shang, Libin Liu, Tian Dong, Jiangnan Lu, Shiming Shi
  • Patent number: 11727888
    Abstract: A display driving circuit is provided. The circuit drives a display panel that includes data lines, sensing lines, and sub-pixels connected to the data lines and the sensing lines. The display driving circuit includes a data driver integrated circuit that drives the data lines. The data driver integrated circuit includes a driving block and a sensing block. The driving block includes plural digital-analog converters (DACs) each performing digital-analog conversion with respect to received sub-pixel data to generate output voltages and provide the output voltages of the DACs to the data lines. The sensing block measures grayscale voltages output from the DACs in a first operation mode and measures pixel voltages of the sub-pixels received from the sensing lines in a second operation mode.
    Type: Grant
    Filed: February 27, 2020
    Date of Patent: August 15, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jiyong Jeong, Yongjoo Song, Jeongah Ahn, Hajun Lee, Youngsub Jin
  • Patent number: 11710441
    Abstract: A display device includes a display area including a plurality of pixels and a plurality of scan lines connected to the plurality of pixels, and a driving circuit portion that generates a compensation data voltage to compensate for a difference in length between the plurality of scan lines to input the compensation data voltage to a pixel disposed in a first area, based on start scan line information indicating a start of the first area including scan lines of the plurality of scan lines, and end scan line information indicating an end of the first area.
    Type: Grant
    Filed: May 24, 2019
    Date of Patent: July 25, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ja Kyoung Jin, Tae Jin Kim
  • Patent number: 11691080
    Abstract: Virtual entities are displayed alongside real world entities in a wearable reality overlay device worn by the user. Information related to an environment proximate to the wearable device is determined. For example, a position of the wearable device may be determined, a camera may capture an image of the environment, etc. Virtual entity image information representative of an entity desired to be virtually displayed is processed based on the determined information. An image of the entity is generated based on the processed image information as a non-transparent region of a lens of the wearable device, enabling the entity to appear to be present in the environment to the user. The image of the entity may conceal a real world entity that would otherwise be visible to the user through the wearable device. Other real world entities may be visible to the user through the wearable device.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: July 4, 2023
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Chris Kalaboukis, Stephan Douris, Marc Perry, Barry Crane
  • Patent number: 11663943
    Abstract: A driver circuit and a display panel. The driver circuit comprises a driver chip (100), a detection signal generation circuit (200), and a feedback circuit (300). The detection signal generation circuit (200) is used for generating a detection control signal for performing aging detection according to the received first voltage signal and second voltage signal. The feedback circuit (300) is used for generating a feedback voltage and outputting same to the driver chip (100) according to the detection control signal and an working voltage, so that the driver chip (100) adjusts the outputted working voltage to a voltage required for performing the aging detection according to the feedback voltage, so as to satisfy the requirement for the diversity of voltage required for the voltage for the aging detection in the process of aging detection.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: May 30, 2023
    Assignee: HKC CORPORATION LIMITED
    Inventor: Xiaoyu Huang
  • Patent number: 11653451
    Abstract: A flexible circuit board and display device including the same are disclosed. In one aspect, the flexible circuit board includes a base film including a bending area and a plurality of signal wires formed over the bending area of the base film. At least one through-hole is defined in the base film.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: May 16, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyeong-Cheol Ahn
  • Patent number: 11645983
    Abstract: The embodiments of the present application disclose a booster circuit and a driving method thereof, a backlight module and a display device. The booster circuit includes: a booster sub-circuit and an oscillation elimination sub-circuit; wherein the booster sub-circuit includes a power supply element, an inductor, and a first switch; the booster sub-circuit is configured to provide, at a connection node, a voltage higher than a voltage provided from the power supply element; and wherein a parasitic capacitance occurs between the connection node and a ground terminal; the oscillation elimination sub-circuit is configured to prevent a current generated when the parasitic capacitance discharges from flowing through the inductor so as to eliminate an oscillation generated between the parasitic capacitance and the inductor.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: May 9, 2023
    Assignees: CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yanwu Chen, Bo Xu
  • Patent number: 11599219
    Abstract: A method performed by a device (e.g., touch controller) includes deriving a pen position, and transmitting a report indicating the derived pen position to a host computer. The report includes a first area storing position data indicating the derived position and a second area storing non-position data different from the position data. The method includes securing a buffer area for retaining a plurality of the reports in a memory, deriving the pen position at each determined scanning time, and generating a report including the position data indicating the derived position. The method includes storing the report in the buffer area and, in response to obtaining the non-position data, writing the non-position data in the second area of each of one or more of the reports stored in the buffer area. The method includes transmitting the plurality of the reports stored in the buffer area to the host computer.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: March 7, 2023
    Assignee: Wacom Co., Ltd.
    Inventors: Sadao Yamamoto, Yoshio Nomura
  • Patent number: 11600224
    Abstract: The present disclosure relates to the field of display technology, and proposes a gate driving circuit and a driving method thereof, and a display panel. The gate driving circuit includes a plurality of cascaded shift register units and switch unit groups. Each of the shift register units and at least one row of pixel units are correspondingly arranged; and switch unit group are arranged between at least a part of adjacent two shift register units. The switch unit group includes a first switch unit and a second switch unit.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: March 7, 2023
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xiao Bai, Shengji Yang, Pengcheng Lu
  • Patent number: 11574588
    Abstract: The present disclosure provides a pixel driving circuit including a driving transistor, a capacitor and a light emitting device, and further includes: a first reset module; a data writing module; a threshold compensation module including a compensation transistor; a light emitting control module configured to disconnect the first power terminal from the first electrode of the driving transistor and disconnect the second electrode of the driving transistor from the light emitting device in the data writing phase and the reset phase; and to enable the first power terminal and the first electrode of the driving transistor to be electrically connected to each other and enable the second electrode of the driving transistor and the light emitting device to be electrically connected to each other in a light emitting phase; the compensation transistor is an oxide transistor, and the driving transistor is a low temperature poly-silicon transistor.
    Type: Grant
    Filed: June 15, 2020
    Date of Patent: February 7, 2023
    Assignees: CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
    Inventors: Shaoru Li, Rui Wang, Ni Yang