Temporal Processing (e.g., Pulse Width Variation Over Time Patents (Class 345/691)
  • Patent number: 11436995
    Abstract: Certain aspects are directed to a circuit for brightness control. The circuit generally includes: a duty cycle adjustment circuit configured to receive a first backlight control signal having a first duty cycle and generate a second backlight control signal having a second duty cycle, the second duty cycle being greater than the first duty cycle if the first duty cycle is less than a threshold; a digital processor configured to set a value of a software brightness code based on the second duty cycle; and a backlight control circuit configured to drive a backlight in accordance with the software brightness code and the second duty cycle of the second backlight control signal.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: September 6, 2022
    Assignee: QUALCOMM Incorporated
    Inventors: Liangguo Shen, Joseph Dale Rutkowski, Sugato Mukherjee
  • Patent number: 11436979
    Abstract: A pixel circuit includes: an organic light emitting diode (OLED); a first transistor having first and second electrodes and a first gate electrode; a second transistor connected between a data line and the first electrode, controlled by a first scan line; a third transistor connected between the second electrode and the a electrode of the first transistor, controlled by the first scan line; a fourth transistor connected between the first gate electrode and a first initialization voltage line, controlled by a second scan line; a fifth transistor connected between a power line and first electrode, controlled by a first emission line; a sixth transistor connected between the second electrode and the OLED and controlled by a second emission line; and a storage capacitor connected between the first gate electrode and the power line, wherein the first emission line and the second emission line are located at different nodes.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: September 6, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung Hwan Kim, Sang Moo Choi, Dae Hyun Kim, Soo Hee Oh, Dong Sun Lee
  • Patent number: 11431831
    Abstract: An electronic device and a method of controlling a screen of the electronic device, and a storage medium. The electronic device includes a screen including at least one multiplexing function region; a function module disposed below the screen, a location of the function module corresponds to a location of the at least one multiplexing function region; controlling the at least one multiplexing function region to be in a first state when receiving a startup instruction of the function module, so that the function module transmits a signal through the at least one multiplexing function region.
    Type: Grant
    Filed: April 16, 2019
    Date of Patent: August 30, 2022
    Inventors: Yang Zhou, Mugyeom Kim, Yong Zhao, Hong Gao
  • Patent number: 11398182
    Abstract: A display device may include a pixel set, a timing controller, a data driver, and a scale factor provider. The pixel set that may include pixels. The pixels may be divided into pixel groups. The timing controller may calculate first load values corresponding to an image frame of input image data and may generate image data by scaling gradation values of the input image data using scale factors. The data driver may generate data signals corresponding to the image data and may supply the data signals to the pixel set. The scale factor provider may calculate the first load values and one or more second load values based on temperature data corresponding to a temperature of the pixel set and may generate the scale factors based on the one or more second load values and a common current value of a current received by the pixels.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: July 26, 2022
    Inventors: Geon Hwi Park, Young Woon Choi, Ki Hyun Pyun
  • Patent number: 11393412
    Abstract: An electronic device is provided, including a display panel and a processor. The display panel is configured to display image data and includes a backlight module, and the processor is electrically connected to the display panel. The processor averages current values of the backlight module corresponding to the image data in a first time period, to generate an average current value, and compares the average current value with a current threshold. When the average current value is greater than the current threshold, the processor generates an adjusted maximum current value, and correspondingly reduces current values of the backlight module in a second time period according to the adjusted maximum current value, to reduce a temperature of the electronic device. A temperature adjustment method of an electronic device is also provided.
    Type: Grant
    Filed: April 20, 2021
    Date of Patent: July 19, 2022
    Assignee: ASUSTEK COMPUTER INC.
    Inventors: Yi-Ching Chen, Chia-Feng Yang, Chia-Lei Yu
  • Patent number: 11386849
    Abstract: An embodiment of the present invention provides a light emitting display device including a display panel including M (M being an integer equal to or greater than 2) subpixels sharing a single sensing line, and a circuit for sensing elements included in at least one of the M subpixels through the sensing line. A first subpixel from among the M subpixels can be defined as a sensing subpixel, a second subpixel can be defined as a non-sensing subpixel. The second subpixel can have an initial period for applying an initialization voltage for a time longer than a data writing period for applying a sensing voltage to the first subpixel.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: July 12, 2022
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jin-Woo Lee, Hye-Min Park, Tae-Gung Kim
  • Patent number: 11380276
    Abstract: A display panel, a display device and a driving method are provided. The display panel includes a subpixel array; among the subpixels in a same row, the subpixels input with the first voltage data signal and the subpixels input with the second voltage data signal are alternately arranged; in adjacent two of the pixels in the same column, the subpixels with a same color each are input with a first voltage data signal and a second voltage data signal.
    Type: Grant
    Filed: January 15, 2018
    Date of Patent: July 5, 2022
    Assignee: HKC CORPORATION LIMITED
    Inventor: Huai Liang He
  • Patent number: 11366354
    Abstract: A display device includes: a light source unit having: a first light source to emit first light having a first peak wavelength; and a second light source to emit second light having a second peak wavelength, the second peak wavelength being shorter than the first peak wavelength; a wavelength conversion member to absorb the second light and convert the second light into first color light and second color light, each of the first and second color light having peak wavelengths different from the first and second peak wavelengths; and a display panel having a first pixel area to display the first color light, a second pixel area to display the second color light, and a third pixel area to display the first light, wherein the first peak wavelength and the second peak wavelength have a value of about 365 nm or more to about 500 nm or less.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: June 21, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dong-uk Kim, Minki Nam, Kyoungwon Park
  • Patent number: 11367385
    Abstract: A display device has a timing controller and a microdriver. The timing controller receives multiple bit sequences of image data for multiple pixels of the display device. The timing controller also reorders the multiple bit sequences based on a significant bit position within the multiple bit sequences. Each of the multiple bit sequences corresponds to a respective individual pixel of the multiple pixels. The microdriver receives the reordered multiple bit sequences and drives the multiple pixels using the reordered plurality of bit sequences.
    Type: Grant
    Filed: February 10, 2021
    Date of Patent: June 21, 2022
    Assignee: Apple Inc.
    Inventors: Seung Bum Rim, Hopil Bae
  • Patent number: 11357087
    Abstract: A passive matrix LED display driving scheme based on subframe pulse width modulation (PWM) to increase frame scan rate and further with channel-to-channel compensation is provided. The scheme may comprise: dividing each frame of the display video into T number of subframes; converting a driving signal for a pixel into a N-bit driving data, compensating the driving data with a compensation value; mapping the compensated driving data into the T number of subframes respectively.
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: June 7, 2022
    Assignee: Solomon Systech (Shenzhen) Limited
    Inventors: Wing Chi Stephen Chan, Chi Wai Lee, Pak Kong Dunn, Tung Hoi Lau, Chun Hung Lai
  • Patent number: 11348508
    Abstract: A display apparatus includes a display panel, a data driver and a driving controller. The display panel is configured to display an image based on input image data. The data driver is configured to output a data voltage to the display panel. The driving controller includes a frequency adjuster circuit configured to determine a driving frequency of the display panel, and a dithering circuit configured to change a grayscale value of the input image data according to frames. The frequency adjuster circuit is configured to determine the driving frequency of the display panel based on the input image data and based on whether the dithering part is activated.
    Type: Grant
    Filed: August 10, 2020
    Date of Patent: May 31, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sehyuk Park, Hong Soo Kim, Sangan Kwon, Jinyoung Roh, Hyo Jin Lee
  • Patent number: 11341891
    Abstract: The present application provides a display panel adjustment method and an adjustment method for a display panel. A fan-out mura region of the display panel is divided into multiple first sub-regions along a first direction; according to an initial grayscale value of a first bonding point in the first sub-region, the fan-out mura degree and a first correction value of the corresponding first sub-region are obtained; and then grayscale compensation is performed on the corresponding first sub-region. The present application improves the mura effects in the fan-out region and improves the display quality of a product.
    Type: Grant
    Filed: October 19, 2020
    Date of Patent: May 24, 2022
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Hui Yang, Xiang Gao
  • Patent number: 11335282
    Abstract: Provided are a driving method for a display panel and a driving device thereof. The driving method includes: dividing pixels into bright pixels and dark pixels that are in a cross arrangement; converting driving signals into bright region driving signals and dark region driving signals; and driving the bright pixels and the dark pixels respectively by using the bright region driving signals and the dark region driving signals.
    Type: Grant
    Filed: November 13, 2018
    Date of Patent: May 17, 2022
    Assignee: HKC CORPORATION LIMITED
    Inventor: Chia-Hang Lee
  • Patent number: 11328659
    Abstract: A display device comprises a plurality of pixels arranged in a first direction and a second direction intersecting the first direction, a plurality of sub-pixels included in each of the plurality of pixels, a first LED chip included in one of the plurality of sub-pixels and emitting light at a first luminosity L1, a second LED chip included in the one of sub-pixel and emitting light at a second luminosity L2, a first wiring supplying a first voltage corresponding to the first luminosity L1 to the first LED chip, a second wiring supplying a second voltage corresponding to the second luminosity L2 to the second LED chip. The first luminous intensity L1 of the first LED chip is calculated based on an equation (1) using a chip area S1 and a luminance EQEL1 of the first LED chip, L1=S1×EQEL1??(1).
    Type: Grant
    Filed: April 23, 2021
    Date of Patent: May 10, 2022
    Assignee: JAPAN DISPLAY INC.
    Inventor: Masanobu Ikeda
  • Patent number: 11322077
    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: March 19, 2021
    Date of Patent: May 3, 2022
    Assignee: LG ELECTRONICS INC.
    Inventor: Youngho Chun
  • Patent number: 11308845
    Abstract: This application relates to a driving method of a display panel. The method includes: dividing sub pixels of the display panel into a plurality of sub pixel groups, each sub pixel group including the same quantity of color sub pixels; for each of the sub pixel groups, respectively adjusting a gamma value of a curve of brightness of each color sub pixel changing with a drive voltage; and for each sub pixel group, adjusting the adjusted gamma value according to a color property of the sub pixel group.
    Type: Grant
    Filed: August 16, 2018
    Date of Patent: April 19, 2022
    Assignees: HKC Corporation Limited, Chongqing HKC Optoelectronics Technology Co., Ltd.
    Inventor: Chih Tsung Kang
  • Patent number: 11302251
    Abstract: A display device may include a pixel, an emission control driver, and a timing controller. The emission control driver may supply an emission control signal set for controlling emission periods of the pixel. The timing controller may receive a received bit stream that includes a first bit set and a second bit set, may determine a first duty ratio of the emission control signal set using bits of the first bit set without using any bit of the second bit set. The first bit set may include at least two bits. The second bit set may include at least one bit. The emission control signal set may control the pixel to operate according to the first duty ratio for each frame of a first frame group.
    Type: Grant
    Filed: June 22, 2020
    Date of Patent: April 12, 2022
    Inventors: Jeong Min Sung, Woo Chul Kim, Weon Jun Choe
  • Patent number: 11289052
    Abstract: An image quality optimization method based on local dimming includes: based on an input image signal, calculating a PWM duty cycle of a current image signal corresponding to each of backlight regions; comparing a preset first PWM duty cycle and a preset second PWM duty cycle with each PWM duty cycle of the current image signal corresponding to each of the backlight regions to determine whether there exists a high backlight region and a low backlight region in the backlight regions; in determining that there exists the high backlight region and the low backlight region, decreasing a PWM duty cycle of the low backlight region to decrease an output current, and increasing a PWM duty cycle of the high backlight region to increase an output current, thereby increasing a contrast of the current image signal. The present application also provides related apparatus and computer readable storage medium.
    Type: Grant
    Filed: September 22, 2020
    Date of Patent: March 29, 2022
    Assignee: SHENZHEN SKYWORTH-RGB ELECTRONIC CO., LTD.
    Inventor: Jilei Qin
  • Patent number: 11282430
    Abstract: An image display system includes an array of pixel elements, column drivers, row drivers, a look up table memory, and a controller. Input video data including gradation information of an input image is received. According to rules of a look up table, the input video data is assigned to multiple groups, binary signals for respective groups are generated using the respective input video data assigned to each group, and an order of the binary signals within at least some groups is rearranged to form respective binary control signals without conflicting state changes. The controller transmits the binary control signals to the column drivers and transmits a select signal that selects the row drivers. Alternatively, the controller transmits the binary control signals to the row drivers and transmits a select signal that selects the column drivers. The select and binary control signals are in synchronization with a clock signal.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: March 22, 2022
    Assignee: IGNITE, Inc.
    Inventors: Fusao Ishii, Victor Stone, Toshitaka Torikai
  • Patent number: 11282459
    Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel displays an image based on input image data. The gate driver outputs a gate signal to a gate line of the display panel. The data driver outputs a data voltage to a data line of the display panel. The driving controller is configured to control an operation of the gate driver and an operation of the data driver, to determine a driving mode of the display apparatus among one of a normal driving mode and a low frequency driving mode, and to determine a driving frequency of the display panel based on the input image data. The driving controller includes a flicker value storage configured to store flicker values for a part of grayscale values among all of grayscale values of the input image data.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: March 22, 2022
    Inventors: Sehyuk Park, Hyojin Lee, Sangan Kwon, Jinyoung Roh
  • Patent number: 11276357
    Abstract: A liquid crystal display device includes a liquid crystal display panel, a light source configured to provide the liquid crystal display panel with a light, a vertical blank detector circuit configured to calculate a counting value of a vertical blank period of a frame by counting a synchronization signal, a luminance correction value calculator circuit configured to calculate a luminance correction value by comparing the counting value of the vertical blank period with a plurality of reference counting values, and a light source driver configured to generate a light source driving signal and provide the light source driving signal to the light source. The light source driving signal has a normal level corresponding to a normal luminance value in an active period of the frame and has a correction level corresponding to the luminance correction value in the vertical blank period of the frame.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: March 15, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jahun Koo, Jinho Park, Jong Deuk Moon, Su-Han Woo, Kyung-Hun Lee, Kyung-Uk Choi
  • Patent number: 11270650
    Abstract: A display device including pixels connected to a p-type scan line, an n-type scan line, and a data line, to display an image in a first mode with a first frequency or a second mode with a second, lower frequency, a first scan driver to supply a p-type signal having a first voltage to the p-type scan line, and a second scan driver to supply an n-type signal having a second, greater voltage to the n-type scan line, the second mode includes a first period corresponding to one frame period and a second period including consecutive frame periods, in which during the first period, the scan drivers supply i number of corresponding signals to the p-type and n-type scan lines, respectively, and during at least one frame of the second period, the first scan driver supplies j number of p-type signals to the p-type scan line.
    Type: Grant
    Filed: April 1, 2020
    Date of Patent: March 8, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung Deok Seo, Seung Kyu Lee, Min Seong Son
  • Patent number: 11263983
    Abstract: According to one embodiment, a display device includes a display panel on which a plurality of pixels having a light emitting element is disposed and a display control unit configured to display an image on the display panel by causing each of the plurality of pixels to emit light based on a pixel signal that defines luminance of each of the plurality of pixels. The display control unit is configured to display the image by decreasing luminance of a first pixel which is a protection target pixel of the plurality of pixels and increasing luminance of a second pixel disposed around the first pixel.
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: March 1, 2022
    Assignee: JAPAN DISPLAY INC.
    Inventors: Tsutomu Harada, Kazunari Tomizawa, Kazunori Yamaguchi
  • Patent number: 11244624
    Abstract: A pixel circuit and a driving method therefor, a display substrate, and a display device are provided. The pixel circuit includes: a light-emitting control circuit, used to control a potential of a first node in response to a first scan signal from a first scan signal terminal and a data signal from a data signal terminal, output a direct current power signal provided by a direct current power terminal to a second node in response to a light-emitting control signal from a light-emitting control signal terminal, and control switching-on and switching-off between a third node and a light-emitting element; a compensation circuit, used to adjust the potential of the first node according to a potential of the second node; and a driving circuit, used to output a driving signal to the third node in response to the potential of the first node and the potential of the second node.
    Type: Grant
    Filed: April 21, 2020
    Date of Patent: February 8, 2022
    Assignees: CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Shuai Chen, Xiuzhu Tang, Zhi Zhang, Fengwei Liu
  • Patent number: 11232744
    Abstract: An organic light emitting diode (OLED) display device includes a display panel having a display region and a peripheral region, an OLED at the display region and including an end connected to a first voltage, a pixel circuit at the display region, a repair pixel circuit at the peripheral region, a repair line for connecting the repair pixel circuit to the OLED, and a switching circuit configured to apply a second voltage to the repair line during a power-up of the OLED display device.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: January 25, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventor: Kyong-Tae Park
  • Patent number: 11232747
    Abstract: The present disclosure provides a display panel and a driving method thereof, and a display apparatus. The display panel includes: a plurality of sub-pixels arranged in an array, a plurality of data lines, and a plurality of compensation detection lines, wherein each data line is coupled with sub-pixels in one column; sub-pixels in every three columns serve as one first sub-pixel group, and each first sub-pixel group corresponds to two compensation detection lines which include a first detection line and a second detection line; and in each first sub-pixel group, sub-pixels in the first column are coupled with the first detection line, sub-pixels in the third column are coupled with the second detection line, and sub-pixels in the second column are alternatively coupled with the first detection line and the second detection line.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: January 25, 2022
    Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd, BOE Technology Group Co., Ltd.
    Inventors: Meng Li, Min He, Zhidong Yuan, Can Yuan, Haixia Xu
  • Patent number: 11217183
    Abstract: A pixel circuit, includes: a driving signal generating sub-circuit configured to generate and output an initial driving signal; a voltage boost sub-circuit electrically connected to the driving signal generating sub-circuit, and configured to receive the initial driving signal, amplify the initial driving signal to generate a target driving signal, and output the target driving signal; and a light-emitting sub-circuit electrically connected to the voltage boost sub-circuit, and configured to receive the target driving signal and be driven by the target driving signal to emit light.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: January 4, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Rongrong Shi, Shengji Yang, Wei Liu
  • Patent number: 11211015
    Abstract: A pixel data compensation method and device for a display device, and a display device are disclosed. The pixel data compensation method includes: obtaining, for a sub-pixel of an n-th row in a column, a pixel compensation quantity Q of the sub-pixel according to a row compensation coefficient Kn of the n-th row of sub-pixels and a voltage deviation ?Vdata corresponding to an initial pixel data Vdata of the sub-pixel; compensating the initial pixel data Vdata of the sub-pixel according to the pixel compensation quantity Q of the sub-pixel to obtain a compensated pixel data V?data of the sub-pixel, and the row compensation coefficient Kn decreases as a row number of the row in which the sub-pixel is located increases.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: December 28, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Xinshe Yin
  • Patent number: 11210985
    Abstract: A signal processing method for maintaining a signal relative relationship and an electronic device thereof are provided. The signal processing method includes: detecting that a current input period of a vertical synchronization signal changes relative to a previous input period; determining whether a frequency difference between a pulse width modulation signal and the vertical synchronization signal is within an acceptable range, and when the frequency difference is not within the acceptable range, performing a frequency adjustment stage to adjust a period of the pulse width modulation signal to be close to the current input period; selectively performing a phase adjustment stage to adjust a phase of the pulse width modulation signal to a phase of the vertical synchronization signal; and maintaining a relative phase relationship between the pulse width modulation signal and the vertical synchronization signal.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: December 28, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Tzu-Min Yeh, Po-Hsien Wu
  • Patent number: 11195474
    Abstract: A display device and a driving method thereof are discussed. This display device receives first and second input reference voltages, generates gamma reference voltages having different voltage levels, receives each of the gamma reference voltages, and generates a data voltage of pixel data. The first and second input reference voltages and the reference voltage are changed according to a variation of the pixel driving voltage.
    Type: Grant
    Filed: June 16, 2020
    Date of Patent: December 7, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Seung Jin Yoo, Sang Jin Nam, Hyun Suk Lee
  • Patent number: 11195487
    Abstract: The invention relates to a display driving circuit, which comprises a gate driving circuit and a source driving circuit. The gate driving circuit outputs a plurality of gate signals. The source driving circuit outputs a plurality of source signals and changes the levels of the source signals when the levels of the gate signals are a turn-off level.
    Type: Grant
    Filed: January 3, 2020
    Date of Patent: December 7, 2021
    Assignee: Sitronix Technology Corp.
    Inventor: Chih-Hao Liu
  • Patent number: 11195479
    Abstract: The present disclosure relates to a method for driving a display device, a driving apparatus, a display device, and a computer-readable medium. The display device includes a backlight module, which includes a plurality of backlight regions. The method includes: determining a first backlight signal value of each of the plurality of backlight regions according to input grayscale values of pixels in an image to be displayed; determining a second backlight signal value of each of the plurality of backlight regions according to the first backlight signal values of the plurality of backlight regions and a preset backlight diffusion function; and driving each of the plurality of backlight regions to emit light using the second backlight signal value of the backlight region.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: December 7, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yanhui Xi, Xiaomang Zhang, Yan Sun, Zhihua Ji, Yuxin Bi, Tiankuo Shi
  • Patent number: 11183131
    Abstract: A gray-scale drive table generating device is described that includes a sampling circuit configured to collect a first voltage between a drive electrode of a sub-pixel of a positive-frame and a common electrode and a second voltage between a drive electrode of a sub-pixel of a negative-frame and the common electrode in a display panel in each gray-scale; a processing circuit configured to generate a trigger signal when a voltage difference between the first voltage and the second voltage is greater than a voltage threshold; an adjustment circuit configured to adjust drive gray-scales of the sub-pixel of the positive-frame and/or the sub-pixel of the negative-frame in response to the trigger signal to make the voltage difference less than the voltage threshold; and a recording circuit configured to generate an adjusted gray-scale drive table according to the drive gray-scales of the sub-pixel of the positive-frame and the sub-pixel of the negative-frame in each gray-scale.
    Type: Grant
    Filed: January 7, 2020
    Date of Patent: November 23, 2021
    Assignees: Hefei BOE Display Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Tao Li, Liugang Zhou, Ke Dai, Yizhan Han, Jianwei Sun, Yulong Xiong, Zhenlin Qu
  • Patent number: 11170693
    Abstract: A display device including a display panel including a plurality of pixels, and a driver configured to drive the display panel. The driver includes a dither configured to perform a dithering operation on image data including a plurality of pixel data for the plurality of pixels to generate dithered image data including a plurality of dithered pixel data respectively corresponding to the plurality of pixel data, and a still image detector configured to receive the dithered image data, to detect dither-irrelevant pixel data that are not changed from the plurality of pixel data by the dithering operation among the plurality of dithered pixel data, and to determine whether the dithered image data represent a still image by using the dither-irrelevant pixel data.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: November 9, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sehyuk Park, Hyojin Lee, Jinyoung Roh
  • Patent number: 11158249
    Abstract: The present disclosure provides a display driving device, method and an OLED display device, and the display driving device includes: an interface module, configured to receive image data of a display chip and sending a first scanning signal in each of frame periods; a frame buffer, configured to send a buffer signal after receiving the first scanning signal from the interface module; a timing controller, configured to send a second scanning signal to the display panel according to the buffer signal sent by the frame buffer; in response to the display driving device is switched from a screen self-refresh mode to a vertical synchronization mode, the delay time between the second scanning signal and the buffer signal gradually decreases, one frame period by one frame period, to zero or gradually increases, one frame period by one frame period, to duration of one frame period.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: October 26, 2021
    Assignee: Everdisplay Optronics (Shanghai) Co., Ltd
    Inventors: Keitaro Yamashita, Chungche Tsou, Yinan Liang, Shaodong Ma
  • Patent number: 11151919
    Abstract: A method of operating a display device includes: receiving image data at an input frame frequency; generating a modulated clock signal by modulating an input clock signal according to a modulation frequency; randomly selecting an output frame frequency within a data frequency selection range, the input frame frequency being within the data frequency selection range; determining an output start timing of the image data based on the output frame frequency; initiating, at the output start timing, output of the image data in synchronization with the modulated clock signal; and displaying an image based on the outputted image data.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: October 19, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Sik Yoon, Daeho Hwang, Jeong-Hyun Kim, Junpyo Lee, Sungsoo Choi
  • Patent number: 11151925
    Abstract: Disclosed are a light emitting display device and a driving method thereof, wherein a sensing mode of the display device includes a first sensing step in which an electrical characteristic of a first sub-pixel is sensed, a first initialization step set in advance of the first sensing step, a second sensing step in which an electrical characteristic of the second sub-pixel is sensed, and a second initialization step set in advance of the second sensing step.
    Type: Grant
    Filed: December 7, 2020
    Date of Patent: October 19, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Hye Min Park, Dong Yoon Lee, Jin Woo Lee
  • Patent number: 11150858
    Abstract: An electronic device includes a processor that is configured to, based on receiving a first partial image from among a plurality of partial images obtained by an input device by dividing an image, obtain first image quality information based on the first partial image and transmit the first image quality information to an external electronic device, based on receiving, from the external electronic device, second image quality information obtained from a second partial image among the plurality of the partial images, obtain image quality processing information corresponding to the image based on the first image quality information and the second image quality information, and process the first partial image based on the image quality processing information, and transmit, via the communication interface, the first partial image processed to one of a plurality of display modules included in an external display device.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: October 19, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sanghoon Oh, Youngkook Kim, Sangkyun Im, Seongkoo Cheong
  • Patent number: 11145256
    Abstract: This document describes systems and techniques for dynamic control of scan signals in active-matrix organic light-emitting diode (AMOLED) displays. Displays in portable electronic devices, such as smartphones, include tens of thousands of pixels. Scan signals in the display control the brightness and color of individual pixels. A leading source of power consumption in AMOLED displays, however, is the parasitic capacitance in the scan lines that carry the scan signals. As the frame rate of AMOLED displays has increased, the frequency of scan signals and the associated parasitic capacitance has also increased. The described AMOLED display can dynamically control the number of pulses in scan signals to reduce power consumption without degrading image quality.
    Type: Grant
    Filed: September 8, 2020
    Date of Patent: October 12, 2021
    Assignee: Google LLC
    Inventors: Sangmoo Choi, Sang Young Youn
  • Patent number: 11145260
    Abstract: Aspects of the subject technology relate to an electronic device with a display. The display includes an array of light-emitting diodes. The array includes a plurality of subarrays of the light-emitting diodes. At least one driver circuit is coupled to the array of light-emitting diodes. The at least one driver circuit is configured to generate an adaptive pulse-width modulated (PWM) signal to control at least one subarray of the plurality of subarrays of the light-emitting diodes. The adaptive PWM signal is designed with each pulse of a group having a pulse width W, each pulse width being reduced until reaching a threshold pulse width, and one pulse being removed from the group of pulses.
    Type: Grant
    Filed: March 31, 2020
    Date of Patent: October 12, 2021
    Assignee: Apple Inc.
    Inventors: Vehbi Calayir, James E. Brown, Venkataraman V. Iyer, Bret Rothenberg
  • Patent number: 11145252
    Abstract: A light-emitting diode apparatus and a control method of the light-emitting diode apparatus are provided. The control method includes: applying a pre-reset voltage to a control terminal of a driving transistor of the light-emitting diode apparatus in a pre-resetting stage to pre-reset the control terminal of the driving transistor; resetting the control terminal of the driving transistor of the light-emitting diode apparatus by using a reset voltage source in a first resetting stage; compensating the control terminal of the driving transistor to a compensation voltage in a compensation stage; and providing, by the driving transistor, a driving current in a light emission stage to drive a light-emitting diode of the light-emitting diode apparatus to emit light.
    Type: Grant
    Filed: May 26, 2019
    Date of Patent: October 12, 2021
    Assignee: Au Optronics Corporation
    Inventors: Sen-Chuan Hung, Shih-Hao Kuo
  • Patent number: 11120723
    Abstract: A display panel driver includes a storage unit configured to store an align pattern and a timing controller configured to output align image data based on an align control signal provided from a facility driver during a mechanism assembly process of a display panel. The align pattern includes an align mark, and the align image data includes the align pattern.
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: September 14, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Silyi Bang, Myung Bo Sim, Won Bok Lee, Shim Ho Yi, Jinhyuk Jang, Chan Sung Jung
  • Patent number: 11120742
    Abstract: Provided herein may be a display device and a driving method thereof. The display device may include a pixel area including multiple pixels, a timing controller configured to generate a control signal based on an input image, a data driver configured to supply a data voltage to data lines coupled to the pixel area depending on the control signal, a scan driver configured to supply scan signals to scan lines coupled to the pixel area depending on the control signal, and a power manager configured to supply an initialization voltage for initializing the multiple pixels and a first supply voltage for driving the multiple pixels to the pixel area. The power manager senses a voltage change in the first supply voltage supplied to the pixel area, and changes the first supply voltage and supplies the same to the pixel area in order to compensate for the sensed voltage change.
    Type: Grant
    Filed: June 4, 2020
    Date of Patent: September 14, 2021
    Inventor: Jong Kwang Hwang
  • Patent number: 11114011
    Abstract: A display driver circuit for high resolution and high frame rate and a display device using the same are provided. A display driver circuit for high resolution and high frame rate includes a GAMMA output circuit, multiple digital-to-analog converters (DACs), multiple source operation amplifiers and at least a pre-charging circuit. The GAMMA output circuit outputs multiple grayscales of GAMMA voltages. Each DAC receives the GAMMA voltages and provides an output data voltage according to display data. Input terminals of the source operation amplifiers correspondingly coupled to output terminals of the DACs receive the corresponding output data voltages. The pre-charging circuit coupled between the input terminal of at least one of the source operation amplifiers and the output terminal of at least one of the DACs pre-charges the input terminal of the coupled source operation amplifier, so that an output terminal of the coupled source operation amplifier has fast response to the received output data voltage.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: September 7, 2021
    Assignee: FOCALTECH SYSTEMS CO., LTD.
    Inventors: Li-Shen Chang, Chien-Hsien Lin, Ko-Ming Su, Wen-Shian Shie
  • Patent number: 11100899
    Abstract: In one embodiment, a computing system may access a first rendered frame generated at a first frame rate. The system may generate, based on the first rendered frame, subframes at a second frame rate higher than the first frame rate. The system may generate a first subframe by determining a viewing direction of the user based on sensor data, determining, based on the viewing direction, at least a first viewing region encompassing a foveal focus point of the user and a second viewing region excluding the first viewing region, determining, for the first subframe, color values corresponding to the first viewing region using a first sampling resolution and color values corresponding to the second viewing region using a second sampling resolution lower than the first sampling resolution. The system may output subframes for display at the second frame rate.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: August 24, 2021
    Assignee: Facebook Technologies, LLC
    Inventor: Larry Seiler
  • Patent number: 11100304
    Abstract: Display panel, driving method, and display device are provided. The display panel includes first signal output lines, first signal input lines, fingerprint recognition units arranged in an array, touch-control electrodes arranged in an array, and a driving circuit. One touch-control electrode corresponds to at least two fingerprint recognition units, and is electrically connected to at least one first signal input line. One fingerprint recognition unit includes a photodiode, a first electrode, and a switch module. A first terminal of the photodiode is electrically connected to the switch module, a second terminal of the photodiode is electrically connected to a corresponding touch-control electrode, the switch module is electrically connected to a corresponding first signal output line, and the first electrode is electrically connected to the first terminal of the photodiode. The first signal output lines and the first signal input lines are electrically connected to the driving circuit.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: August 24, 2021
    Assignee: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Min Huang, Ying Sun, Yumin Xu
  • Patent number: 11100855
    Abstract: A display device capable of improving image quality is provided. A first pixel circuit and a second pixel circuit are included; a memory node is provided in each pixel circuit and a first signal can be retained in the memory node. The first signal is added to a second signal by capacitive coupling, and then can be supplied to a display element. Thus, the display device can display a corrected image. Furthermore, the first pixel circuit and the second pixel circuit share a signal line, whereby the aperture ratio of a pixel can be increased.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: August 24, 2021
    Inventors: Kazunori Watanabe, Kei Takahashi, Susumu Kawashima, Kouhei Toyotaka, Koji Kusunoki
  • Patent number: 11094279
    Abstract: A pixel compensation method, a pixel compensation device and a display device are provided. The pixel compensation method includes: determining a target sub-pixel to be compensated in a display area; setting at least one charged sub-pixel connected to a same data line as the target sub-pixel, as a reference sub-pixel; acquiring a compensation value of the target sub-pixel; and compensating a display parameter of the target sub-pixel based on the compensation value.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: August 17, 2021
    Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yifang Chu, Guangliang Shang, Jieqiong Wang
  • Patent number: 11094251
    Abstract: A method includes representing dots of an image to be displayed within a field by a digital image code. The field is divided into sub-fields which are further divided into a first and second time interval which respectively comprise a first and a second number of equally long time slots. Time slots are assigned to each bit of the digital image code according to each bit's significance. Successive time slots of the first time interval are assigned to one of the bits of the image code and successive time slots of the second time interval are assigned to a different one of the bits of the image code. Within the duration of at least one sub-field, each rows is selected twice for respectively writing a first bit of the image code during the first time interval and writing a second bit of the image code during the second time interval.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: August 17, 2021
    Assignee: IMEC VZW
    Inventor: Jan Genoe
  • Patent number: 11074864
    Abstract: A pixel circuit compensates the threshold voltage variations of the drive transistor with an ultra-short one horizontal (1H) time, with additionally removing the possible memory effects associated with the light-emitting device and the drive transistor from the previous frame. An ultra-short 1H time (<2 ?s) is achieved via separation of threshold compensation of the drive transistor and data programming phases. The pixel circuit has a two-capacitor configuration, whereby a first capacitor is used for drive transistor threshold compensation, and a second capacitor is used to store the data voltage during a data pre-loading phase. Two transistors are employed to electrically connect the gate of the drive transistor to the second capacitor that stores the data voltage, wherein each transistor in this dual transistor configuration is controlled by a different control signal.
    Type: Grant
    Filed: March 26, 2020
    Date of Patent: July 27, 2021
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tong Lu, Michael James Brownlow