Gray Scale Capability (e.g., Halftone) Patents (Class 345/89)
  • Patent number: 12293736
    Abstract: Disclosed are a driving method of a display panel and a display device. The driving method of the display panel includes: obtaining display data of a current display frame (S100); and inputting a data voltage to a data line according to the display data, so that the corresponding data voltages are charged into sub-pixels electrically connected to the data line (S200), where the data voltages inputted on the data line are divided into a plurality of voltage groups, each voltage group includes at least two adjacent data voltages, the polarities corresponding to the data voltages in a same voltage group are the same, the polarities corresponding to the data voltages of the two adjacent voltage groups inputted into a same data line are different, and the polarities of the corresponding voltage groups on the two adjacent data lines are different.
    Type: Grant
    Filed: September 20, 2022
    Date of Patent: May 6, 2025
    Assignees: Hefei BOE Display Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Liugang Zhou, Huiming Wang, Jianwei Sun, Jun Wang, Yunyun Liang, Qing Li, Yu Quan, Yanting Huang, Yunlu Chen, Zhengru Pan
  • Patent number: 12288520
    Abstract: The disclosure is directed at a CMOS-like logic gate including a set of thin-film transistors (TFTs), the set of TFTs including a subset of pull down TFTs, a subset of diode-connected TFTs and an output pull-up transistor; and a capacitor; wherein the subset of diode-connected TFTs, the output pull-up transistor and the capacitor are positioned to provide a bootstrapped feedback network to provide full-output swing; and wherein the subset of diode-connected TFTs and one of the subset of pull-down TFTs form a leakage current path; and wherein at least one of the subset of pull-down TFTs is connected to a first input.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: April 29, 2025
    Inventors: Sheida Gohardehi, Manoj Sachdev, Qing Li, William Wong
  • Patent number: 12283221
    Abstract: A display control device includes a visual field determination unit configured to determine whether or not a display device for displaying content is included in a visual field of a person included in an image captured by an imaging device that images a region around the display device, a central visual field determination unit configured to determine whether or not the display device is included in a central visual field within the visual field, and a change determination unit configured to determine whether or not to temporarily change a display mode of the display device displaying first content before the content is switched from the first content displayed on the display device to second content to be subsequently displayed when it is determined that the display device is included in the visual field but is not included in the central visual field.
    Type: Grant
    Filed: December 28, 2023
    Date of Patent: April 22, 2025
    Assignee: SHARP NEC DISPLAY SOLUTIONS, LTD.
    Inventor: Eisaku Ishii
  • Patent number: 12277900
    Abstract: A power circuit can include a direct current to direct current converter configured to output a first voltage; a digital-to-analog converter configured to convert input data to an analog voltage and output a second voltage; and a voltage regulating circuit configured to receive the first voltage and the second voltage as inputs and output a voltage in which the second voltage is added to the first voltage, and reduce a slope of the voltage. Also, the input data to the digital-to-analog converter is updated during one horizontal period of a display device, and the voltage regulating circuit is further configured to commonly supply the voltage to pixels of the display device.
    Type: Grant
    Filed: September 13, 2023
    Date of Patent: April 15, 2025
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ki Tae Kwon, Yong Hwa Park
  • Patent number: 12260835
    Abstract: A driving method and drive circuit of a display panel, a display panel, and a display device. The method includes: receiving initial image data of a frame to be displayed, the resolution of an initial image corresponding to the initial image data being different from the resolution of a display panel; the initial image data including a plurality of pieces of initial gray scale data for displaying the initial image; according to the initial gray scale data in the initial image data, the resolution of the initial image, and the resolution of the display panel, determining target gray scale data corresponding to panel sub-pixels in the display panel; and driving the display panel to display according to the target gray scale data.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: March 25, 2025
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Shaolei Zong, Xin Duan, Jigang Sun, Wei Sun, Rui Liu
  • Patent number: 12236841
    Abstract: A pixel circuit and a display panel are provided. The pixel circuit includes a driving transistor T2 and a pulse width driving module. The pulse width driving module includes a display time control unit, an electrical potential modulation unit, and a Schmitt trigger. By connecting the Schmitt trigger in series between an output terminal of the electrical potential modulation unit and a control terminal of the display time control unit, the driving transistor T2 can be turned off more quickly, thereby accurately controlling the display time or light-emitting time of the pixel circuit.
    Type: Grant
    Filed: December 17, 2021
    Date of Patent: February 25, 2025
    Assignee: TCL China Star Optoelectronics Technology Co., Ltd.
    Inventor: Jian Xu
  • Patent number: 12217721
    Abstract: A mura inspection device may include; an optical meter configured to measure luminance of a display region and generate a first luminance matrix, a luminance preprocessor configured to detect a distortion region of the display region in relation to the first luminance matrix, and generate a second luminance matrix by adjusting luminance of the distortion region, a mura generator configured to generate a mura matrix in relation to a difference between the second luminance matrix and a reference value, and an encoder configured to generate encoding data by applying dimensionality reduction to the mura matrix.
    Type: Grant
    Filed: September 27, 2022
    Date of Patent: February 4, 2025
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Pil-Seung Heo, Se Whan Na
  • Patent number: 12211463
    Abstract: A device and a method for outputting video content for display on a display. At least one processor displays a first video content on the display, receives a second video content to display, obtains a first luminance value for the first video content, extracts a second luminance value from the second video content, adjusts a luminance of a frame of the second video content based on the first and second luminance values and outputs the frame of the second video content for display on the display. The video content can comprise frames and a luminance value can be equal to an average frame light level for the most recent L frames of the corresponding video content. In case a luminance value is unavailable, a Maximum Frame Average Light Levels of the first video content and the second video content can be used instead.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: January 28, 2025
    Assignee: InterDigital CE Patent Holdings
    Inventors: Erik Reinhard, Pierre Andrivon, David Touze
  • Patent number: 12211855
    Abstract: The display substrate includes a substrate, multiple sub-pixels, multiple data lines, multiple power lines, multiple data signal input lines, multiple selector switches, a first power bus located in a peripheral area and on a side, facing away from the display area, of the multiple selector switches, and multiple power connection cables located in the peripheral area and between the first power bus and the multiple power lines. The multiple power connection cables are electrically connected with the first power bus and the multiple power lines.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: January 28, 2025
    Assignees: Chengdu BOFF OptoElectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Tinghua Shang, Lulu Yang, Zhengwei Luo
  • Patent number: 12183243
    Abstract: A display panel control method, a display mode of the display panel including a normal display mode and a partial highlight display mode, the control method including obtaining display information of a display area in the display panel in the partial highlight display mode, the display information including a grayscale displayed corresponding to each pixel, and a number of pixels displaying the corresponding grayscale; determining a target gamma curve based on the display information, a difference between a display brightness corresponding to the grayscale in the target gamma curve and a target display brightness required for the pixels to display the corresponding grayscale in the partial highlight display mode being within a predetermined range; and controlling the pixels in the display area to display based on the target gamma curve.
    Type: Grant
    Filed: April 6, 2023
    Date of Patent: December 31, 2024
    Assignee: Xiamen Tianma Display Technology Co., Ltd.
    Inventors: Chen Zhong, Meng Lai, Qiang Chen, Jingxiong Zhou, Zhiqiang Xia, Wenlan Liu, Yinzeng Li, Ying Sun, Liujing Fan
  • Patent number: 12183240
    Abstract: A display panel includes a first pixel group including sub-pixels coupled to a first scan line and located in first through N-th sub-pixel columns, where N is an even number greater than or equal to 2, a second pixel group including sub-pixels coupled to the first scan line and located in (N+1)-th through 2N-th sub-pixel columns, a third pixel group including sub-pixels coupled to a second scan line adjacent to the first scan line and located in the first through N-th sub-pixel columns, and a fourth pixel group including sub-pixels coupled to the second scan line and located in the (N+1)-th through 2N-th sub-pixel columns. The first pixel group and the second pixel group are driven during a first scan on time in which the first scan line is driven.
    Type: Grant
    Filed: February 6, 2023
    Date of Patent: December 31, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin-Wook Yang, Soon-Dong Kim, Chang-Noh Yoon, Eun-Gyeong Choe
  • Patent number: 12159567
    Abstract: A gamma tap circuit includes: (i) a first gamma division circuit configured to generate a first gamma tap voltage by performing voltage division of an upper gamma tap voltage and a lower gamma tap voltage, in-sync with a first clock signal CK1 and a first complementary clock signal CK1b, which is 180° out-of-phase relative to CK1, (ii) a second gamma division circuit configured to generate a second gamma tap voltage by performing voltage division of the upper gamma tap voltage and the first gamma tap voltage, in-sync with a second clock signal CK2 and a second complementary clock signal CK2b, which is 180° out-of-phase relative to CK2, and (iii) a third gamma division circuit configured to generate a third gamma tap voltage by performing voltage division of the first gamma tap voltage and the lower gamma tap voltage, in response to CK2 and CK2b, which have a lower frequency relative to CK1 and CK1b.
    Type: Grant
    Filed: September 14, 2023
    Date of Patent: December 3, 2024
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Ying-Da Chang, Chulho Choi, Yu-Chieh Huang, Ching-Chieh Wu, Hajoon Shin, Zhen-Guo Ding, Jia-Way Chen, Kyunlyeol Lee, Yongjoo Song
  • Patent number: 12147112
    Abstract: A transparent display apparatus includes a liquid crystal cell and a Sight source opposite to a side surface of the ceil. The cell Includes a first substrate, first electrodes on the first substrate, a second substrate, a second electrode on the first or second substrata, a liquid crystal layer between the two substrates, signal lines on the first substrate, and a light-shielding pattern on the second substrate. The layer is configured to totally reflect or scatter light from the light source incident to a region, opposite to a first electrode, due to action of an electric field provided by the first and second electrodes. At least one signal line has a bottom surface and a light-reflecting side surface facing the light source, and a slope angle therebetween is acute. The pattern is located in a reflection path after a portion of the light irradiates the light-reflecting side surface.
    Type: Grant
    Filed: July 6, 2021
    Date of Patent: November 19, 2024
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yidan Peng, Long Wang, Nanfang Jia, Zhiliang Wang, Yitong Guo
  • Patent number: 12148339
    Abstract: A gamma voltage generator, a source driver and a display apparatus are provided. The gamma voltage generator includes a gamma voltage generating circuit and a plurality of buffers. The gamma voltage generating circuit has a plurality of voltage input end nodes and a plurality of voltage output end nodes for outputting the predetermined number of gamma voltages based on input voltages from the plurality of voltage input end nodes. Each buffer has an input end receive a corresponding gamma reference voltage, and an output end coupled to a corresponding voltage input end node. The gamma voltage generating circuit includes multiple resistor units connected in series, and each resistor unit is configured to have a second resistance value when operating in the second mode less than a first resistance value when operating in the first mode.
    Type: Grant
    Filed: March 30, 2023
    Date of Patent: November 19, 2024
    Assignee: NOVATEK MICROELECTRONICS CORP.
    Inventor: Chi-Yi Lo
  • Patent number: 12148394
    Abstract: Among the implementations described herein is a gamma voltage generator which includes a first resistor string that is connected between a 0-th terminal and a first terminal and outputs first gamma voltages, a 0-th gamma amplifier that outputs a 0-th tap voltage to the 0-th terminal by using a 0-th reference voltage, a first variable tap gamma amplifier that outputs a first tap voltage to the first terminal by using a first reference voltage, and a gamma control logic circuit that selectively activates a first tap change signal based on a first grayscale ratio of first line data. The first variable tap gamma amplifier outputs a second tap voltage to a first central terminal of the first resistor string by using a second reference voltage, in response to the first tap change signal thus activated.
    Type: Grant
    Filed: May 1, 2023
    Date of Patent: November 19, 2024
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Taek Su Kwon
  • Patent number: 12125422
    Abstract: A display device includes a deterioration evaluation region including dummy pixels and a display region. A control circuit determines a gray level for a first display pixel and determines whether the first display pixel is in a first deterioration mode or a second deterioration mode based on a driving history of the first display pixel. The control circuit determines, in the first deterioration mode, a data signal to be supplied to the first display pixel based on the gray level and the driving history of the first display pixel. The control circuit determines, in the second deterioration mode, a data signal to be supplied to the first display pixel based on the gray level, the driving history of the first display pixel, and measurement results about a current-voltage characteristic acquired from dummy pixels in the deterioration evaluation region of the same color as the first display pixel.
    Type: Grant
    Filed: April 19, 2023
    Date of Patent: October 22, 2024
    Assignee: Wuhan Tianma Micro-Electronics Co., Ltd.
    Inventors: Yojiro Matsueda, Masamichi Shimoda
  • Patent number: 12112697
    Abstract: A display method includes obtaining input data of a first color sub-pixel in an N-th frame and in an (N?1)-th frame; looking up, in a first lookup table, predetermined input data of the first color sub-pixel in the N-th frame and a predetermined compensation value corresponding to the input data of the first color sub-pixel in the (N?1)-th frame; obtaining input data of a second color sub-pixel; looking up, in a second lookup table, a first impact factor of input data of the second color sub-pixel in the (N?1)-th frame to the predetermined input data; calculating an actual compensation value at least according to the predetermined compensation value and the first impact factor; calculating target input data of the first color sub-pixel in the N-th frame; and performing display, by the first color sub-pixel, according to the target input data.
    Type: Grant
    Filed: September 16, 2022
    Date of Patent: October 8, 2024
    Assignee: Wuhan Tianma Micro-Electronics Co., Ltd.
    Inventor: Mingxia Xu
  • Patent number: 12112677
    Abstract: The present application discloses a drive circuit. The drive circuit includes: a first module, configured to generate image data; and a second module, configured to set a state value corresponding to the next image data based on a frame refresh rate corresponding to the current image data, a state value corresponding to the current image data and a state value corresponding to the previous image data.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: October 8, 2024
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Jhenwei He
  • Patent number: 12094402
    Abstract: A display driving device includes a high voltage operating unit obtaining an operating current according to the application of the high power supply voltage from the first voltage application line; a low voltage operating unit that operates according to an application of a low power supply voltage to control the high voltage operating unit; a recycling circuit that receives the operating current from the high voltage operating unit via a relay coupling line and applies the low power supply voltage to the low voltage operating unit while supplying the received operating current to a reference potential line via the low voltage operating unit; and a current bypass circuit that flows a part of the operating current flowing through the relay coupling line into the reference potential line without supplying the part of the operating current to the recycling circuit according to a voltage increase in the low power supply voltage.
    Type: Grant
    Filed: March 30, 2020
    Date of Patent: September 17, 2024
    Assignee: LAPIS SEMICONDUCTOR CO., LTD.
    Inventor: Hiroyoshi Ichikura
  • Patent number: 12044939
    Abstract: According to one embodiment, each of a first liquid crystal to a fourth liquid crystal cell includes a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode, the first strip electrode to the fourth strip electrode of the first liquid crystal cell and the first strip electrode to the fourth strip electrode of the third liquid crystal cell have a first shape, and the first strip electrode to the fourth strip electrode of the second liquid crystal cell and the first strip electrode to the fourth strip electrode of the fourth liquid crystal cell have a second shape that is different from the first shape.
    Type: Grant
    Filed: September 6, 2023
    Date of Patent: July 23, 2024
    Assignee: Japan Display Inc.
    Inventors: Kojiro Ikeda, Takeo Koito
  • Patent number: 12039904
    Abstract: A noise measurement device for measuring noise of a test image displayed on a display device including a display panel and an input sensor configured to sense an external input, includes a luminance meter, a converter, and a determiner. The luminance meter is configured to: measure a luminance of the test image in a state in which the input sensor is turned on to generate first luminance measurement values; and measure a luminance of the test image in a state in which the input sensor is turned off to generate second luminance measurement values. The converter is configured to apply a contrast sensitivity function to luminance difference values between the first and second luminance measurement values to generate final conversion values. The determiner is configured to compare the final conversion values with a predetermined reference range to determine whether a defect exists in the test image.
    Type: Grant
    Filed: June 20, 2022
    Date of Patent: July 16, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yujin Sin, Jun-Young Ko, Tae-Ho Kim, Eunsol Seo
  • Patent number: 12020623
    Abstract: The gamma correction method for a display device measures a first driving current according to a first grayscale voltage corresponding to the low grayscale value, determines a predicted luminance based on a driving current-luminance calibration function and the first driving current, compares the predicted luminance and a first target luminance for the low grayscale value, determines a first offset value based on the first driving current and the first target luminance when the predicted luminance is different from the first target luminance, and corrects the first grayscale voltage based on the first offset value. That is, the gamma correction method may measure the driving current to perform gamma correction for the low grayscale value, and shorten a process time of the gamma correction compared to performing the gamma correction for the low grayscale value by measuring luminance.
    Type: Grant
    Filed: January 19, 2023
    Date of Patent: June 25, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Moonsang Hwang, Donghak Pyo
  • Patent number: 12020622
    Abstract: A display device and a driving method are proposed to obtain the gray value difference data of the display device when the gray value of the display device changes. So, the display device could determine the corresponding compensation data according to the gray value difference of the display device and then the compensation data and the driving data are used to drive the display device. In this way, the driving data are compensated when the display device has a variance of gray value such that the charging operation becomes sufficient to charge the display device. For example, the charging speed becomes faster to allow the display device to reach sufficient luminance such that the issues of color shifts or insufficient luminance could be avoided.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: June 25, 2024
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Wenfang Li
  • Patent number: 12014699
    Abstract: The present application discloses a display panel, a display panel driving method, and a display device. Each row of pixels includes a plurality of pixel groups, and each pixel group includes a first column of pixels and a second column of pixels which are adjacent; the first column of pixels and the second column of pixels are connected to a same data line; the first column of pixels is connected with a 2n?1th row of scanning lines, and the second column of pixels is connected with a 2nth row of scanning lines; a source driver outputs a driving voltage to each column of pixels, where for a same gray scale value, a driving voltage corresponding to the first column of pixels of at least one column is smaller than a driving voltage corresponding to the second column of pixels.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: June 18, 2024
    Assignee: HKC CORPORATION LIMITED
    Inventor: HuaiLiang He
  • Patent number: 12008953
    Abstract: A display device includes a display panel. The display panel includes sub-pixels. A driver converts first frame data corresponding to a first pixel arrangement of the sub-pixels into second frame data corresponding to a second pixel arrangement and provides data signals corresponding to second frame data to the sub-pixels having the second pixel arrangement. The driver includes a padding circuit and a rendering circuit. The padding circuit converts the first frame data into padding data by adding a padding value to at least one of a front end and a rear end of each line data of the first frame data. The rendering circuit generates the second frame data by applying a rendering filter to the padding data.
    Type: Grant
    Filed: May 25, 2023
    Date of Patent: June 11, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hyun Kyung Song, Jong Woong Park, Hye Sang Park
  • Patent number: 12001089
    Abstract: According to one embodiment, a display system includes an external light sensor, a display panel, a viewing angle control panel including a liquid crystal layer containing liquid crystal molecules twist-aligned, configured such that a drive voltage applied to the liquid crystal layer is controlled based on an external light intensity detected by the external light sensor, and a polarization axis rotation element disposed between the viewing angle control panel and the display panel. The drive voltage when the external light intensity is less than a threshold value is greater than the drive voltage when the external light intensity is greater or equal to than the threshold value.
    Type: Grant
    Filed: June 16, 2023
    Date of Patent: June 4, 2024
    Assignee: JAPAN DISPLAY INC.
    Inventor: Toshiharu Matsushima
  • Patent number: 11984094
    Abstract: An array substrate has a display area and a bonding region. The display area includes a distal region, a proximal region, and a middle region therebetween. The array substrate includes a base, a common electrode located in the display area, a connecting lead disposed outside the distal region, a conductive frame at least partially surrounding the display area, and at least one first common signal line, at least one second common signal line and at least one third common signal line. The first common signal line, the second common signal line and the third common signal line are respectively coupled to portions of the common electrode located in the distal region, the proximal region and the middle region. The first common signal line is coupled to the connecting lead. The connecting lead and the portion of the common electrode located in the distal region are coupled to the conductive frame.
    Type: Grant
    Filed: March 28, 2023
    Date of Patent: May 14, 2024
    Assignees: BEIJING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD
    Inventors: Xiao Wang, Yan Yan, Yu Ma
  • Patent number: 11955091
    Abstract: A method of driving a display device, which includes a plurality of segments, each including a plurality of pixels, includes comparing grayscales of first image data of a first frame with respect to a segment among the plurality of segments and grayscales of a second image data of a second frame after the first frame with respect to the segment, modulating the second image data to generate first modulated data when the grayscales of the first image data are equal to the grayscales of the second image data, and providing data voltages to the segment based on the first modulated data.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: April 9, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sukhun Lee, Kihyun Pyo
  • Patent number: 11942015
    Abstract: A source driver, including a plurality of channel circuits, each of the plurality of channel circuits including a first digital-to-analog converter (DAC), a second DAC, a first switch, a second switch and an output buffer circuit, is provided. The output terminal of the output buffer circuit is configured to be coupled to a data line of a display panel. An output terminal of the first DAC is coupled to a first input terminal among the input terminals of the output buffer circuit. An output terminal of the second DAC is coupled to a second input terminal among the input terminals of the output buffer circuit. The first switch is disposed along a first signal path between the output terminal of the first DAC and the output terminal of the output buffer circuit. The second switch is disposed along a second signal path between the output terminal of the second DAC and the output terminal of the output buffer circuit.
    Type: Grant
    Filed: October 20, 2021
    Date of Patent: March 26, 2024
    Assignee: Novatek Microelectronics Corp.
    Inventors: Yen-Cheng Cheng, Hsiu-Hui Yang
  • Patent number: 11935490
    Abstract: A display device includes a display panel including a gate line, a data line, and a pixel at a crossing region of the gate line and the data line, a timing controller configured to generate a gate driving control signal, a data driving control signal, and a power control signal based on a display period corresponding to a time interval of frames, a gate driver configured to provide a gate signal to the pixel through the gate line based on the gate driving control signal, a data driver configured to provide a data signal to the pixel through the data line based on the data driving control signal, and a power supply configured to generate a power voltage to drive the pixel, and configured to adjust the power voltage based on the power control signal during the display period.
    Type: Grant
    Filed: September 9, 2022
    Date of Patent: March 19, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Si-Beak Pyo, Won-Ju Shin, Kyung-Ho Hwang
  • Patent number: 11935457
    Abstract: A method of driving a display panel includes: driving a plurality of sub-pixels of a plurality of sub-pixel groups to display in a plurality of frames. In each of the sub-pixel groups in each frame, a number of the sub-pixels with high gray-scale data compensation status and the positive polarity is equal to a number of the sub-pixels with the high gray-scale data compensation status and the negative polarity, a ratio of a number of the sub-pixels with the high gray-scale data compensation status to a number of the sub-pixels with low gray-scale data compensation status is 1:m, where m is an integer greater than 1.
    Type: Grant
    Filed: April 28, 2023
    Date of Patent: March 19, 2024
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
    Inventors: Jhenwei He, Jianyu Liu
  • Patent number: 11908379
    Abstract: A color temperature calibration method includes: making a display screen display a test image at a target color temperature; measuring a chromaticity of a target pixel in the display screen to obtain measured color coordinates of the target pixel; comparing the measured color coordinates with standard color coordinates; if differences between the measured color coordinates and the standard color coordinates are greater than a target threshold, adjusting at least one of pixel values of the target pixel, until differences between re-obtained measured color coordinates and the standard color coordinates are not greater than the target threshold; and if differences between the measured color coordinates and the standard color coordinates are not greater than the target threshold, ending the color temperature calibration.
    Type: Grant
    Filed: December 25, 2020
    Date of Patent: February 20, 2024
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Xian Wang
  • Patent number: 11908376
    Abstract: A compensation system includes a processor configured to determine compensated data for display on a sub-pixel of the display device. The processor may receive image data configured to be displayed on the sub-pixel, convert the gray level data to first voltage data; fetch, from a memory, compressed 1×1 sub-pixel uniformity compensation data for the sub-pixel, and decompress the compressed 1×1 sub-pixel uniformity compensation data via a decompressor. The decompressed data comprises the 1×1 sub-pixel uniformity compensation data for the sub-pixel. The processor may also determine a voltage compensation offset value associated with the sub-pixel based on the second voltage data, generate compensated voltage data based in part on the voltage compensation offset value and the first voltage data, convert the compensated voltage data to compensated gray level data; and transmit the compensated gray level data to pixel driving circuitry associated with the sub-pixel.
    Type: Grant
    Filed: March 31, 2022
    Date of Patent: February 20, 2024
    Assignee: Apple Inc.
    Inventors: Lingtao Wang, Giovanni Carbone, Chaohao Wang, Enkhamgalan Dorjgotov, Sheng Zhang, Jim C Chou, Shereef Shehata, Yung-Chin Chen
  • Patent number: 11908369
    Abstract: A contrast enhancement device included in a display device includes an analysis circuit which receives input image data as input data in a normal mode, receives input test data as the input data in a diagnosis mode, and determines a contrast enhancement coefficient by analyzing the input data, a process circuit which generates output data by performing a contrast enhancement process on the input data based on the contrast enhancement coefficient, where the output data in the normal mode is output image data corresponding to the input image data, and the output data in the diagnosis mode is output test data corresponding to the input test data, and a diagnosis circuit which outputs the output image data in the normal mode, and generates diagnosis result data for the contrast enhancement device by comparing the output test data with reference test data in the diagnosis mode.
    Type: Grant
    Filed: December 27, 2022
    Date of Patent: February 20, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dale Yim, Seok Hwan Roh
  • Patent number: 11900851
    Abstract: A display device includes a timing controller and a grayscale unit electrically connected to the timing controller. The timing controller may generate first data for a pixel for a previous frame and first data for the pixel for a current frame. The grayscale unit may output a black-corresponding grayscale as second data for the pixel when a predetermined condition is satisfied. The black-corresponding grayscale corresponds to black. The predetermined condition may include that the first data for the pixel for the previous frame is in a predetermined second gray scale range and that the first data for the pixel for the current frame is in a predetermined first grayscale range. The predetermined first grayscale range may be between the predetermined second grayscale range and the black-corresponding grayscale.
    Type: Grant
    Filed: April 13, 2023
    Date of Patent: February 13, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae Seok Ha, Woon Rok Jang
  • Patent number: 11887518
    Abstract: A display device includes a first liquid crystal panel, a second liquid crystal panel disposed on a back face side of the first liquid crystal panel, a position compensation unit that compensates for a display position of an image on the second liquid crystal panel based on position compensation information indicating a relative positional relationship between the first liquid crystal panel and the second liquid crystal panel, and an area expansion unit that expands a displayable area of the image before the display position is compensated for or a displayable area of the image after the display position is compensated for by the position compensation unit.
    Type: Grant
    Filed: December 28, 2022
    Date of Patent: January 30, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Tatsunori Nakamura
  • Patent number: 11869430
    Abstract: A pixel is divided into a first subpixel and a second subpixel. A first data signal is input to a first drive unit that drives a first light-emitting element constituting the first subpixel, and a second data signal is input to a second drive unit that drives a second light-emitting element constituting the second subpixel. A gray scale value of the first data signal is smaller than a gray scale value of the second data signal.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: January 9, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Yusuke Sakakibara
  • Patent number: 11862113
    Abstract: The present disclosure relates to a display panel and an electronic device. The display panel includes a driving array; first light-emitting deices electrically connected with the driving array; and second light-emitting devices located between at least two of the first light-emitting devices and electrically connected with the driving array. In a case where the first light-emitting devices are in a working state and the second light-emitting devices are in a first state, the display panel is in a first mode; and in a case where the first light-emitting devices are in a working state and the second light-emitting devices are in a second state, the display panel is in a second mode, wherein a visual angle of the display panel in the first mode is greater than 0 and smaller than a visual angle of the display panel in the second mode.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: January 2, 2024
    Assignee: CHONGQING KONKA PHOTOELECTRIC TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Xiaojiao Wei, Shan-Fu Yuan, Liu-Chung Lee, Tzu-Ping Lin
  • Patent number: 11862077
    Abstract: A method for improving image display quality, including: dividing a total gray scale range of a gamma voltage curve of a display apparatus to obtain gray scale ranges; obtaining data of gray scales of frame(s) of image to be displayed by the display apparatus, and calculating a ratio of data of gray scales in each gray scale range; adjusting a division value of a gamma voltage range corresponding to each gray scale range of the gamma voltage curve according to calculated ratios, so that a division value of a gamma voltage range corresponding to a gray scale range with a maximum ratio is less than a division value of a gamma voltage range corresponding to any remaining gray scale range; and outputting gamma voltages corresponding to the data of gray scales of the frame(s) of image to be displayed according to the adjusted gamma voltage curve.
    Type: Grant
    Filed: March 9, 2021
    Date of Patent: January 2, 2024
    Assignee: Boe Technology Group Co., LTD.
    Inventors: Fei Yang, Yu Wang
  • Patent number: 11847972
    Abstract: Disclosed is an electronic device, which includes a display panel, a data driving circuit, a scan driving circuit, a signal control circuit, and a power supply circuit that trims a first voltage and a second voltage based on a first control value generated based on the first voltage and the second voltage, and the power supply circuit includes a controller that generates the first control value, a sign determining circuit that determines a sign of the first control value based on the first voltage and the second voltage, a plurality of voltage generators that generate a trimming voltage of the first control value based on the first voltage and the second voltage, and a first memory that stores the first control value, and the first control value is a value for controlling the sign determining circuit and each of the plurality of voltage generators.
    Type: Grant
    Filed: January 25, 2023
    Date of Patent: December 19, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dae-Sik Lee, Keunoh Kang, Sanghyun Lee
  • Patent number: 11847947
    Abstract: A flexible display device includes: a flexible display panel including a plurality of pixels, a power supply line coupled to the plurality of pixels, and at least one measuring line; a power management circuit, which supplies a power supply voltage to the plurality of pixels through the power supply line; and a display driver, which drives the flexible display panel. The display driver senses a resistance of the at least one measuring line, and detects at least one of a deformation position and a deformation amount of the flexible display panel based on the sensed resistance.
    Type: Grant
    Filed: August 23, 2022
    Date of Patent: December 19, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yunki Baek, Joon-Chul Goh
  • Patent number: 11842705
    Abstract: A display apparatus with low-power consumption is provided. The display apparatus includes an inverter circuit and a pixel having a function of adding data, and the inverter circuit has a function of inverting data supplied from a source driver. The inverter circuit has a function of inverting data supplied from a source driver. The pixel has a function of adding data supplied from the source driver and the inverter circuit. Accordingly, the pixel can generate a voltage several times higher than the output voltage of the source driver and can supply the voltage to a display device. With such a structure, the output voltage of the source driver can be lowered, so that a display apparatus with low power consumption can be achieved.
    Type: Grant
    Filed: June 21, 2022
    Date of Patent: December 12, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Susumu Kawashima, Koji Kusunoki, Kazunori Watanabe, Naoto Kusumoto
  • Patent number: 11830442
    Abstract: The present disclosure relates to a gamma voltage generating circuit and a display device including the same. The gamma voltage generating circuit may include: a first output terminal to output a first gamma voltage set as a black grayscale voltage; a second output terminal to output a second gamma voltage set as a higher grayscale voltage than the black grayscale voltage; a third output terminal to output a third gamma voltage set as a highest grayscale voltage of the first pixel area; and a fourth output terminal to output a fourth gamma voltage set as a highest grayscale voltage of the second pixel area.
    Type: Grant
    Filed: September 19, 2022
    Date of Patent: November 28, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Seung Taek Oh, Kyu Jin Kim, Bo Yun Jung
  • Patent number: 11810494
    Abstract: An electronic device may include an electronic display having multiple display pixels to display an image based on analog voltage signals. The electronic device may also include optical calibration circuitry to generate digital-to-analog converter (DAC) data based on image data associated with the image and dither circuitry to reduce a bit-depth of the DAC data, generating dithered DAC data. Additionally, the electronic device may include a gamma generator having one or more DACs to generate the analog voltage signals based on the dithered DAC data, which may instruct the gamma generator to generate the analog voltage signals indicative of the image data.
    Type: Grant
    Filed: August 16, 2022
    Date of Patent: November 7, 2023
    Assignee: Apple Inc.
    Inventors: Jie Won Ryu, ByoungSuk Kim, David S Zalatimo, Graeme M Williams, Hyunsoo Kim, Hyunwoo Nho, Jesse R Manders, Kingsuk Brahma, Li-Xuan Chuo, Sachiko Oda, Shatam Agarwal, Yao Shi
  • Patent number: 11810524
    Abstract: The present application relates to a virtual reality display device and a control method thereof. The method comprises: acquiring time required for three-dimensional scene rendering when three-dimensional scene rendering is performed on a frame of image to be displayed (S11); and selecting a mode of local backlight dimming according to the time required for three-dimensional scene rendering and a predetermined screen refresh rate, wherein the greater the time required for three-dimensional scene rendering, the less the time required for the selected mode of the local backlight dimming (S12).
    Type: Grant
    Filed: December 29, 2020
    Date of Patent: November 7, 2023
    Assignees: Beijing BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Wenyu Li, Jinghua Miao, Lili Chen, Hao Zhang, Jinbao Peng, Mingyang Yan
  • Patent number: 11803212
    Abstract: A foldable display device may include: a display panel including a first active area, a second active area, and a foldable area between the first active area and the second active area for folding and unfolding the display panel; and a camera in the second active area or overlapping with the second active area. The first active area may be configured to display a test pattern, and the camera may be configured to capture the test pattern to output captured data for compensating a data voltage applied to at least one of the first active area and the second active area of the display panel for displaying an image.
    Type: Grant
    Filed: October 28, 2022
    Date of Patent: October 31, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Boyun Jung, SeungTaek Oh
  • Patent number: 11756491
    Abstract: The present invention provides a display device driving method, a display device. The method achieves dynamic adjustment of a brightness of light emission of backlight units according to display contents corresponding to the display units. Also, conversion of a bit width of a drive voltage value is implemented based on a drive voltage conversion relationship table between first bit width drive voltage values and second bit width drive voltage values of the brightness values, which improves the driving effect of the backlight module.
    Type: Grant
    Filed: May 18, 2020
    Date of Patent: September 12, 2023
    Inventors: Xin Zhang, Tao He
  • Patent number: 11749164
    Abstract: A controller to drive a display includes a voltage code generator and a voltage code compensator. The voltage code generator is configured to generate a first voltage code to drive pixels in the display based on input image data. The voltage code compensator is to generate a second voltage code to drive the pixels by compensating zero-grayscale codes of the first voltage code based on the zero-grayscale codes of the first voltage code, one-grayscale codes of the first voltage code, and the input image data.
    Type: Grant
    Filed: July 28, 2022
    Date of Patent: September 5, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kihyun Pyun, Jang-Mi Lee
  • Patent number: 11729876
    Abstract: A unified color control method for a multi-color light, including the following control steps: S1: setting unified color control system and color implementation system for different light sources; S2: inputting a target color parameter, and calculating a target color chromaticity coordinate (xt,yt) by the color control system according to the target color parameter: S3: calculating a primary-color duty ratio Di of corrected colors by the color implementation system using a linear programming equation according to the target color chromaticity coordinate (xt,yt), and a chromaticity coordinate value (xi,yi) and a maximum brightness value Yi of each primary color for each light source under a maximum duty ratio, in which i represents an i-th primary color; and S4: updating colors by the light sources according to the primary-color duty ratio Di of corrected colors in step S3.
    Type: Grant
    Filed: September 30, 2021
    Date of Patent: August 15, 2023
    Assignee: GUANGZHOU HAOYANG ELECTRONIC CO., LTD.
    Inventor: Weikai Jiang
  • Patent number: 11719967
    Abstract: According to one embodiment, a display system includes an external light sensor, a display panel, a viewing angle control panel including a liquid crystal layer containing liquid crystal molecules twist-aligned, configured such that a drive voltage applied to the liquid crystal layer is controlled based on an external light intensity detected by the external light sensor, and a polarization axis rotation element disposed between the viewing angle control panel and the display panel. The drive voltage when the external light intensity is less than a threshold value is greater than the drive voltage when the external light intensity is greater or equal to than the threshold value.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: August 8, 2023
    Assignee: JAPAN DISPLAY INC.
    Inventor: Toshiharu Matsushima