Temporal Processing (e.g., Pulse Width Variation Over Time Patents (Class 345/691)
  • Patent number: 10733934
    Abstract: An organic light-emitting display device can include a display panel including a plurality of pixels and configured to express luminance based on a driving current corresponding to a data signal for providing a data voltage and a first power; a control circuit configured to output a first mode control signal corresponding to a normal mode and a second mode control signal corresponding to a standby mode for providing lower luminance than the normal mode; and a power source configured to supply the first power to the display panel at a first voltage level, in response to receiving the first mode control signal corresponding to the normal mode, and supply the first power to the display panel at a second voltage level that is lower than the first voltage level, in response to receiving the second mode control signal corresponding to the standby mode.
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: August 4, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: BuYeol Lee, YoungJoon Lee
  • Patent number: 10726754
    Abstract: A defect detection circuit and a defect detection method for a light-emitting element, a display driving device, a display device, and a defect detection method for the display device are provided. The defect detection circuit includes a power source signal adjustment sub-circuit, a data signal adjustment sub-circuit, a first initial signal adjustment sub-circuit, a second initial signal adjustment sub-circuit and a storage capacitor connected to a control end of a driving transistor. The storage capacitor is configured to control the driving transistor to be turned off under the effect of a power source signal, a data signal and an initial signal, to enable the second initial signal adjustment sub-circuit to apply the initial signal to a light-emitting sub-circuit, thereby to enable the light-emitting sub-circuit to emit light. The display driving device includes the defect detection circuit.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: July 28, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., ORDOS YUANSHENG OPTOELECTRONICS CO., LTD.
    Inventors: Xiaowei Wang, Guoqing Zhang, Longfei Yang, Lei Wang, Ke Zhao, Weifeng Wang, Hongxia Yang, Meili Guo, Feiwen Tian
  • Patent number: 10720114
    Abstract: A display apparatus includes a display, a frequency compensator, a frequency adjuster, and a driver. The display includes first, second, and third pixels to display an image having color information. The frequency compensator receives first, second, and third pixel data respectively corresponding to the first, second, and third pixels, converts the first, second, and third pixel data to hue data, and outputs a frequency control signal to change a current driving frequency of the display based on the hue data. The frequency adjuster changes the driving frequency to a predetermined compensation frequency in response to the frequency control signal and changes a frequency of image data and an image control signal such that the display is driven at the predetermined compensation frequency. The driver receives the changed image data and the changed image control signal and drives the display at the predetermined compensation frequency.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: July 21, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Nam-gon Choi, Jonghyun Lee, WonJin Seo
  • Patent number: 10714051
    Abstract: A driving apparatus and a driving signal generating method are provided. The driving apparatus includes a timing controller, a driver, a switch and a resistor. The timing controller generates a bi-direction lock signal. The driver receives a differential signal pair. The switch is turned on or cut off according to an eye diagram detection result of the differential signal pair. According to the bi-direction lock signal, the timing controller and the driver are used to: operate a first clock and data recovery (CDR) operation on the differential signal pair during a first time period; set setting parameters of an output differential voltage, a pre-emphasis circuit and an equalizer according to the eye diagram detection result and an on/off state of the switch, and perform a second CDR operation during a second time period; and drive a display according to the differential signal pair during a third time period.
    Type: Grant
    Filed: August 16, 2019
    Date of Patent: July 14, 2020
    Assignee: Au Optronics Corporation
    Inventors: Sheng-Yao Huang, Hung-Chi Wang, Ya-Fang Chen
  • Patent number: 10713191
    Abstract: A semiconductor apparatus includes first transmitters allocated to a first data byte, and second transmitters allocated to a second data byte, wherein a power supply node of each transmitter allocated to a deactivated byte of the first data byte and the second data byte is coupled with a ground terminal.
    Type: Grant
    Filed: April 24, 2018
    Date of Patent: July 14, 2020
    Assignee: SK hynix Inc.
    Inventor: Kyung Hoon Kim
  • Patent number: 10706778
    Abstract: According to one embodiment, a display apparatus having a display device including a plurality of pixels, each of the pixels including: a drive transistor; and a light emitting element coupled to the drive transistor and to a reference potential, wherein a current from the drive transistor to the light emitting element is determined based on a voltage between a gate and a source of the drive transistor, and the display device is configured to divide a one-frame period during which a frame image is being displayed into certain unit time segments each having a same time period and each including one or more light emission time slots during each of which the pixel is emitting light and one or more no-light emission time slots during each of which the pixel is not emitting light, and then configured to switch light emission of the pixel on and off in a manner such that a light quantity in the one or more light emission time slots per each of the unit time segment is equalized.
    Type: Grant
    Filed: May 23, 2019
    Date of Patent: July 7, 2020
    Assignee: Japan Display Inc.
    Inventors: Masahiro Kubota, Norio Nakamura
  • Patent number: 10699643
    Abstract: The present disclosure relates to a pixel driving compensation circuit. The pixel driving compensation circuit can detect and compensate a driving current of a sub-pixel in a pixel unit. The pixel unit includes first, second, and third sub-pixels and the first to third sub-pixels respectively include first, second, and third driving transistors. The pixel driving compensation circuit includes a first switching sub-circuit configured to be turned on in a first period to transmit a driving current output from the first driving transistor to a first detection line, second switching sub-circuit configured to be turned on in a second period to transmit a driving current output from the second driving transistor to a first detection line, and a third switching sub-circuit configured to be turned on in the first period to transmit a driving current output from the third driving transistor to a second detection line.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: June 30, 2020
    Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd, BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Can Yuan, Zhidong Yuan, Yongqian Li, Pan Xu, Wenchao Bao, Min He
  • Patent number: 10679546
    Abstract: A timing controller includes a count control circuit, a pulse width detector, and a pulse generator. The count control circuit receives an external enable signal. Pulses of the external enable signal include an effective and a blank period of image data. The count control circuit counts pulse widths of each of the pulses. The pulse width detector receives the counted pulse widths, compares a pulse width of a present pulse with pulse widths of previous pulses, and detects a pulse width of a previous pulse that has a pulse width smaller than the pulse width of the present pulse. The pulse generator generates three output pulses having pulse widths that are one-third a period of the detected previous pulse. The pulse generator outputs the first, second and third pulses as an internal enable signal.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: June 9, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ik-Hyun Ahn, Jae-Hyoung Park
  • Patent number: 10679535
    Abstract: The present disclosure provides an array substrate, a testing method, a display panel and a display apparatus. The array substrate includes: multiple gate wires and data wires intersecting with each other to divide multiple sub-pixel regions, where the sub-pixels corresponding to each of the data wires form a column of the sub-pixels, and M neighboring columns of the sub-pixels form a sub-pixel group; multiple switch units, where a first end of each of the switch units is electrically connected to one of the data wires; and multiple testing ends, each of which is electrically connected to second ends of the switch units. In such configuration, at least two switch units are electrically connected to the data wires corresponding to ith columns of the sub-pixels in at least two alternately arranged sub-pixel groups, respectively. Accordingly, impacts to voltage of common electrodes may be avoided and testing effect may be improved.
    Type: Grant
    Filed: October 12, 2018
    Date of Patent: June 9, 2020
    Assignees: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventor: Conghua Ma
  • Patent number: 10674105
    Abstract: A solid state imaging device includes: a pixel array unit that has a plurality of pixels 2-dimensionally arranged in a matrix and a plurality of signal lines arranged along a column direction; A/D conversion units that are provided corresponding to the respective signal lines and convert an analog signal output from a pixel through the signal line into a digital signal; and a switching unit that switches or converts the analog signal output through each signal line into a digital signal using any of an A/D conversion unit provided corresponding to the signal line through which the analog signal is transmitted, and an A/D conversion unit provided corresponding to a signal line other than the signal line through which the analog signal is transmitted.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 2, 2020
    Assignee: Sony Corporation
    Inventor: Takashi Kawaguchi
  • Patent number: 10657897
    Abstract: The present invention provides a driving compensation circuit for an organic light-emitting diode (OLED) display unit. The OLED display unit includes: N first switching transistors, N second switching transistors, N sensing units, and a calculation and processing unit. The calculation and processing unit is configured to calculate a mapping relationship between a data voltage of the data line and current information, and to calculate a data compensation voltage in a display phase according to second current information and the mapping relationship.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: May 19, 2020
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
    Inventors: Xiaolong Chen, Hongjun Xie
  • Patent number: 10643536
    Abstract: A pixel circuit and a driving method thereof, a display panel. The pixel circuit includes a driving circuit, a light emitting circuit and a short-circuit protection circuit. The short-circuit protection circuit is connected in series between the driving circuit and the light emitting circuit, and the short-circuit protection circuit is configured to obtain an input terminal signal of the light emitting circuit and disconnect or connect an input signal branch of the light emitting circuit according to the obtained input terminal signal of the light emitting circuit.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: May 5, 2020
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Han Yue, Xiaochuan Chen, Shengji Yang, Dongni Liu, Lei Wang, Jie Fu, Pengcheng Lu, Li Xiao
  • Patent number: 10636366
    Abstract: Disclosed is a display device including: a display panel configured to display an image of a series of frames based on input image data; a light source configured to emit light to the display panel; a light source driver configured to supply a driving signal to the light source so that the light source can emit light; and a processor configured to detect a brightness change of a first frame of image data input to the display panel, make the light source driver supply a driving signal having a first frequency to the light source when the brightness change is lower than a predetermined boundary value, and make the light source driver supply a driving signal having a second frequency lower than the first frequency to the light source when the brightness change is higher than the boundary value. Thus, it is possible to decrease a flicker that occurs when the liquid crystal display device is driven with a PWM signal, i.e. an impulse signal for reducing a motion blur.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: April 28, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jin-sung Kang, Sung-hwan Jang
  • Patent number: 10621923
    Abstract: A scanning drive system of AMOLED display panel is provided. The scanning drive system of AMOLED display panel of this disclosure comprises a gate drive circuit, a scanning signal selection circuit and a pixel drive circuit. The scanning signal outputted to the scanning signal selection circuit by gate drive circuit. The scanning signal selection circuit controls the first output terminal and the second output terminal simultaneously output the low-potential signal, scanning signal, or respectively output the low-potential signal and the scanning signal, or respectively output the scanning signal and the low-potential signal to the pixel drive circuit according to the first control signal and the second control signal. It could simultaneously achieve internal compensation and reduces requirement of output channel number of gate drive circuit, and enhances flexibility control a scanning signal selection circuit.
    Type: Grant
    Filed: November 25, 2017
    Date of Patent: April 14, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Limin Wang
  • Patent number: 10621039
    Abstract: An electronic device includes an area control signal generation circuit and an area column control signal generation circuit. The area control signal generation circuit generates an area control signal in response to an operation control signal and an internal information signal. The area control signal includes information on whether each of a plurality of cell areas performs an error correction operation. The area column control signal generation circuit delays a column pulse signal for a delay period, which is determined according to the area control signal, to generate an area column control signal that controls a column operation of the plurality of cell areas.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: April 14, 2020
    Assignee: SK hynix Inc.
    Inventors: Jae In Lee, Youngjae Jin
  • Patent number: 10614740
    Abstract: Provided are a display device and method of driving the same. A display device includes: a display panel including: data lines and gate lines intersecting each other, and pixels in a matrix, a timing controller configured to reduce a refresh rate of the pixels in a low-speed driving mode compared to a refresh rate of the pixels in a normal driving mode, and a display panel driving circuit configured to: write data to the display panel, write data to the pixels during N driving frame periods within a unit of time, that is set to the refresh rate of the low-speed driving mode, under the control of the timing controller, where “N” is a positive integer of 2 to 4, wherein the pixels are configured to hold a voltage of previous data for a remaining time other than the N driving frame periods of the unit of time.
    Type: Grant
    Filed: September 27, 2016
    Date of Patent: April 7, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Junho Lee, Youngjang Lee
  • Patent number: 10607553
    Abstract: A display apparatus includes an image data compensator. The image data compensator receives input image data, compensates for the input image data according to a temperature of a display panel to output first compensation image data in order to compensate for a luminance decrease of the display panel according to the temperature of the display panel, and compensates for the first compensation image data according to an efficiency and a life expectancy of a quantum dot to output second compensation image data in order to compensate for a luminance decrease of the display panel by the quantum dot.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: March 31, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae-Hyun Kim, Yongjun Jang, Jaewoong Kang, Taejin Kim, Junyong Song
  • Patent number: 10607544
    Abstract: An organic light-emitting display device includes an organic light-emitting display panel having a plurality of subpixels connected to data lines and gate lines; a data driver driving the data lines; and a gate driver driving the gate lines, wherein the organic light-emitting display device has a first mode having a first refresh rate and a second mode having a second refresh rate that is lower than the first refresh rate, the second mode having a first period and a second period that is subsequent to the first period, and wherein, in the first period of the second mode, the data driver subsequently supplied data voltages to at least two of the plurality of subpixels, and in the second period of the second mode, the data driver supplies a specific voltage to the plurality of subpixels, the specific voltage being the same as one of at least two of the data voltages sequentially supplied to the at least two subpixels.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: March 31, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventors: BuYeol Lee, YoungJoon Lee
  • Patent number: 10600361
    Abstract: A display panel and a threshold detection method are provided. The display panel includes a plurality of data signal lines configured to transmit data signals, a plurality of scanning lines configured to transmit driving signals, a plurality of reference voltage signal lines configured to transmit reference voltage signals, and a plurality of pixels enclosed and defined by the mutually insulated data signal lines and scanning lines. A pixel driving circuit is disposed in each pixel, and each pixel driving circuit corresponds to one data signal line and one reference voltage signal line. The pixel driving circuits are arranged in a plurality of rows.
    Type: Grant
    Filed: November 16, 2016
    Date of Patent: March 24, 2020
    Assignees: Shanghai Tianma AM-OLED Co., Ltd., Tianma Micro-electronics Co., Ltd.
    Inventors: Dong Qian, Zeyuan Chen, Wenhui Zou, Dongxu Xiang, Gang Liu
  • Patent number: 10580343
    Abstract: A display data transmission method and apparatus, and a display panel drive method and apparatus are provided. The display data transmission method is provided for transmitting display data to a display panel having a plurality of pixels. The display data transmission method comprises: calculating transmission data comprising an initial value and a plurality of sequential values, each value corresponding to a pixel of the plurality of pixels of the display panel; each of the sequential values being a difference value between a gray scale value of the corresponding pixel and a gray scale value of an adjacent previous pixel; and transmitting the transmission data to the display panel.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: March 3, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., Chengdu BOE Optoelectronics Technology Co., Ltd.
    Inventors: Lei Dai, Taehyum Kim, Xiuzhu Tang
  • Patent number: 10573251
    Abstract: A method for driving an LCD device includes: (S110) displaying each picture with two frame images, wherein the two frame images comprise a first frame image and a second frame image; wherein a driving voltage for each sub-pixel in the first frame image is greater than a driving voltage for a corresponding sub-pixel in the second frame image; (S120) determining a backlight brightness compensation signal according to the driving voltages of the first frame image and the second frame image; and (S130) compensating the backlight brightness of a next picture according to the backlight brightness compensation signal, such that the backlight brightness of the first frame image of the next picture is less than a reference backlight brightness and the backlight brightness of the second frame image is greater than the reference backlight brightness.
    Type: Grant
    Filed: March 14, 2017
    Date of Patent: February 25, 2020
    Assignees: HKC CORPORATION LIMITED, CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Yujen Chen
  • Patent number: 10520778
    Abstract: This invention relates to a liquid crystal lens and a display device, and the liquid crystal lens includes a first substrate, a second substrate, a first electrode unit, plural electrode units, and a liquid crystal layer. Liquid crystal molecules corresponding to the electrode units form a plurality of lenses under the effect of a controlled electric field produced by the second electrode unit and the first electrode unit, and at least some of the lenses have different structures.
    Type: Grant
    Filed: August 14, 2017
    Date of Patent: December 31, 2019
    Assignees: HKC Corporation Limited, Chongqing HKC Optoelectronics Technology Co., Ltd.
    Inventor: Yu-Jen Chen
  • Patent number: 10522070
    Abstract: A converter includes a phase locked loop (“PLL”) unit which outputs a first frequency signal having a first frequency during a first period of one frame and to output a second frequency signal modulated to have a frequency corresponding to a pattern of an image signal during a second period other than the first period, a pulse width modulation (“PWM”) signal generator which generates a PWM signal according to the frequency of the frequency signal outputted from the PLL unit, and a voltage generator which outputs a driving voltage obtained by modulating an input voltage in response to the PWM signal to a voltage output terminal.
    Type: Grant
    Filed: November 2, 2017
    Date of Patent: December 31, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Woon Yong Lim, Sung Soo Choi, Ki Hyun Pyun
  • Patent number: 10524327
    Abstract: A wallbox controller for controlling a parameter of an electrical device can include a selector circuit that controls a value of the parameter within a range of values. The wallbox controller can also include a first range limit setting interface coupled to the selector circuit, where the first range limit setting interface sets a first limit for the range of values.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: December 31, 2019
    Assignee: Eaton Intelligent Power Limited
    Inventors: Rohit Madhav Udavant, Vaske Mikani
  • Patent number: 10522083
    Abstract: The present disclosure relates to an organic light-emitting diode (OLED) driving circuit, including: a switch thin film transistor (TFT), a driving TFT, a storage capacitor, a third TFT, a sixth TFT, an OLED, and an elimination module. A gate of the third TFT is configured to receive reset signals, a first end of the third TFT is configured to receive a reset voltage, and a second end of the third TFT is electrically connected to the first node. A gate of the sixth TFT is configured to receive enabling signals, and a first end of the sixth TFT is electrically connected the second node. An elimination module is electrically connected to the first electrode of the storage capacitor and the first end of the driving TFT. The elimination module is configured to receive the data voltage and the power supply voltage.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: December 31, 2019
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Xue Li, Xueshun Hou
  • Patent number: 10522094
    Abstract: Disclosed is a liquid crystal display device comprising a liquid crystal layer including a plurality of liquid crystals in a pixel area and a backlight unit coupled to the liquid crystal layer. A plurality of pixels are disposed in the pixel area. The backlight unit is configured to project light towards the entire pixel area of the liquid crystal layer during an illumination time period of a frame time, and not to project the light towards any of the pixel area of the liquid crystal layer during a non-illumination time period of the frame time. By enabling the backlight unit for the illumination time period less than the frame time, image streaking and latency can be reduced.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: December 31, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Evan M. Richards, Nirav Rajendra Patel, Jianru Shi
  • Patent number: 10522100
    Abstract: A method of driving a display panel includes compensating first pixel data corresponding to a first pixel of a plurality of pixels in the display panel based on at least one of a first decision, a second decision, or a third decision and generating a first data voltage corresponding to the compensated first pixel data. The first data voltage is applied to the first pixel through a data line. The first decision includes determining, based on a position of the first pixel, whether compensation for the first pixel data is required. The second decision includes determining, based on previous subpixel data and present subpixel data for the first pixel, whether the compensation for the first pixel data is required. The third decision includes determining whether the first pixel data complies with a compensation avoidance condition.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: December 31, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae-Won Jeong, Kwan-Young Oh, Ga-Na Kim, Gyeong-Ub Moon, Po-Yun Park, Ji-Woong Jeong, Kyung-Uk Choi, Sang-Ho Park
  • Patent number: 10515600
    Abstract: A liquid crystal display device in which an inversion driving scheme is applied to a pixel array which shares data lines. The liquid crystal display device varies driving waveforms of gate signals or data signals according to temperature and may suppress a color deviation of a display panel attributable to inversion of polarities of data signals. A timing controller may be configured to apply control signals to a data drive circuit and a gate drive circuit, the control signals includes a slew rate control pulse that controls the data drive circuit to vary any one of a rising slew rate and a falling slew rate of the data signal corresponding to the main charge interval of each of the gate signals.
    Type: Grant
    Filed: February 20, 2018
    Date of Patent: December 24, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kiyong Park, Sangmin Kang, Kyungsik Kim
  • Patent number: 10509618
    Abstract: An OLED display device includes a communication unit to connect with a terminal, a display unit including a pixel including an OLED, and a controller to receive mirroring image data, which corresponds to a screen displayed on the terminal, through the communication unit, to control the display unit to display a mirroring image on an area of the display unit based on the received mirroring image data, and to control the display unit not to display the displayed mirroring image on the area based on an average picture level (APL) of the displayed mirroring image.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: December 17, 2019
    Assignee: LG ELECTRONICS INC.
    Inventor: Youngho Chun
  • Patent number: 10501688
    Abstract: The present disclosure provides an enhanced wavelength converting structure. The enhanced wavelength converting structure includes a first crosslinked cholesteric liquid crystal layer and a plurality of first quantum dots dispersed in the first crosslinked cholesteric liquid crystal layer. When a first light is incident into the enhanced wavelength converting structure, the plurality of first quantum dots are excited and emit a second light of a wavelength different from a wavelength of the first light, and the second light is toned up via multiple reflections in the first crosslinked cholesteric liquid crystal layer. The present disclosure further provides a luminescent film and a display backlighting unit.
    Type: Grant
    Filed: December 21, 2015
    Date of Patent: December 10, 2019
    Assignee: Industrial Technology Research Institute
    Inventors: Yi-Chun Liu, Pao-Ju Hsieh, Mei-Chih Peng
  • Patent number: 10490608
    Abstract: A display device is capable of preventing damage to a signal line in a dehydrogenation process of a semiconductor layer and to a method of manufacturing the display device, the display device including: a substrate; at least one switching element on the substrate; a pixel electrode connected to the at least one switching element; a semiconductor layer on the substrate, the semiconductor layer providing a channel area of the at least one switching element; an insulating layer on the semiconductor layer; and a conductive layer connected to the semiconductor layer through a contact hole of the insulating layer. The insulating layer has a groove that overlaps the semiconductor layer and surrounds the conductive layer in the contact hole.
    Type: Grant
    Filed: July 19, 2017
    Date of Patent: November 26, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sungeun Lee, Junghyun Kim, Jintaek Kim, Kiwan Ahn, Joosun Yoon, Kwangyoung Choi
  • Patent number: 10482820
    Abstract: A method of compensating luminance of an organic light-emitting diode (OLED) operated with a transistor in a pixel cell of a display panel includes measuring a first parameter of the transistor and a parameter of the OLED, and generating a lookup table accordingly; converting original display data to target display data according to the lookup table; outputting the target display data to the pixel cell; and compensating a second parameter of the transistor when the target display data is received by the pixel cell.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: November 19, 2019
    Assignee: NOVATEK Microelectronics Corp.
    Inventors: Chun-Chieh Lin, Hua-Gang Chang, Hsueh-Yen Yang, Shang-Yu Su, Feng-Ting Pai
  • Patent number: 10460642
    Abstract: Systems, methods, and devices are provided to reduce noise present in sensing circuits used for calibrating light emitting diodes (e.g., organic light emitting diodes) in electronic display devices. Such a system may include a display that renders image data using self-emissive pixels. Values on the pixels may be sensed using a current source that outputs a current and a comparator that receives the current. The comparator changes states when a voltage signal output by the capacitor crosses a first threshold voltage or a second threshold voltage. A controller receives a first time when the comparator component changes states based on the voltage signal, receives a second time when the comparator component changes states based on the voltage signal, determines a current value based on the first time and the second time, and calibrates a pixel based on the current value.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: October 29, 2019
    Assignee: Apple Inc.
    Inventors: Hung Sheng Lin, Jiayi Jin, Wei H. Yao, Hyunwoo Nho, Guangmao Xing, Weijun Yao, Xiaofeng Wang, Yafei Bi, Haifeng Li
  • Patent number: 10460680
    Abstract: The present invention discloses a liquid crystal display panel and a driving method thereof, and a liquid crystal display, which the driving method comprises: normalizing an image to be displayed first, to obtain characteristic data of the input image; extending backlight boundary of each backlight partition according to a default condition, and determining a backlight opening coefficient of each backlight partition by data information after the backlight boundary extension; the backlight opening coefficient of each backlight partition subjected to a fusion process, to obtain a driving current of the liquid crystal display panel; obtaining characteristic data of output image of each backlight partition based on the characteristic data of the input image and the driving current; displaying the output image by the driving current and the characteristic data. It is possible to display high-quality picture information in the case of optical crosstalk existing in the liquid crystal display panel.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: October 29, 2019
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd
    Inventor: Guowei Zha
  • Patent number: 10424241
    Abstract: A system includes a display panel having an input to receive pixel data representative of a sequence of display images and an array of display elements. Each display element includes a first buffer stage, a second buffer stage coupled to the first buffer stage, and a light emitting diode (LED) coupled to the second buffer stage. The display panel further includes a controller to control the array of display elements to concurrently activate the LEDs of the array for a first time interval based on pixel data of a first display image stored at the second buffer stages of the array of display elements and to receive and store at least a portion of pixel data of a second display image at the first buffer stages of the array of display elements during the first time interval.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: September 24, 2019
    Assignee: GOOGLE LLC
    Inventors: Yi Tao, John Kaehler
  • Patent number: 10417970
    Abstract: A display device includes: a display unit including a plurality of pixels connected with data lines and scan lines with different lengths; a data driver configured to supply a data signal to the data lines; a scan driver configured to supply a scan signal to the scan lines; and a timing controller controlling the data driver to supply the data signal to the data lines at different output timings according to a position of a scan line to which the scan signal is supplied.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: September 17, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ho Seok Son, Tae Jin Kim, Soo Wan Yoon, Myung Ho Lee
  • Patent number: 10395592
    Abstract: A pixel unit structure of an organic light emitting diode display panel includes a switch transistor, a storage capacitor, an organic light emitting diode, a driving transistor, a first control circuit, and a second control circuit. The organic light emitting diode is controlled by the driving transistor and the first control circuit to emit light. The pixel unit operates in a number of time events repeating in sequence.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: August 27, 2019
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: Chung-Wen Lai, Sheng-Han Li
  • Patent number: 10360848
    Abstract: The disclosure comprises a first to a seventh transistor, a capacitor and a light-emitting diode, the second end of the first transistor, the first end of the fifth transistor and one end of the capacitor being connected at the first node, the first end of the second transistor, the control end of the third transistor and the other end of the capacitor being connected at the second node. The second ends of the second, the third and the forth transistor is connect at the third node, the first end of the forth transistor and the first end of the seventh transistor is connected to the anode of the light-emitting diode. The second end of the sixth transistor is connected to the second node, and the second end of the fifth transistor, the first end of the sixth transistor and the second end of the seventh transistor connect with each other.
    Type: Grant
    Filed: July 20, 2016
    Date of Patent: July 23, 2019
    Assignee: EVERDISPLAY OPTRONICS (SHANGHAI) LIMITED
    Inventor: Huannan Wang
  • Patent number: 10360857
    Abstract: Disclosed is a liquid crystal display device comprising a liquid crystal layer including a plurality of liquid crystals in a pixel area and a backlight unit coupled to the liquid crystal layer. A plurality of pixels are disposed in the pixel area. The backlight unit is configured to project light towards the entire pixel area of the liquid crystal layer during an illumination time period of a frame time, and not to project the light towards any of the pixel area of the liquid crystal layer during a non-illumination time period of the frame time. By enabling the backlight unit for the illumination time period less than the frame time, image streaking and latency can be reduced.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: July 23, 2019
    Assignee: Facebook Technologies, LLC
    Inventors: Evan M. Richards, Nirav Rajendra Patel, Jianru Shi
  • Patent number: 10360854
    Abstract: A display device according to an embodiment of the present disclosure comprises a display panel including a display area having a plurality of pixels connected to a plurality of gate lines, a gate driving circuit in a non-display area adjacent to the display area and including a plurality of stages supplying a gate signal to the plurality of gate lines, and an auxiliary load connected to at least one stage of the plurality of stages in the non-display area in which a number of the plurality of pixels which are connected to at least two gate lines among the plurality of gate lines varies. Therefore, the load applied to the output node of the gate driving circuit is uniformly adjusted so that a screen abnormality of the display device may be suppressed.
    Type: Grant
    Filed: November 20, 2017
    Date of Patent: July 23, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Jiyun Kim, ChangJae Jang, Kyungah Chin, JinHwan Kim, Jongchan Park, Hyunchul Um, Eunkyung Seong
  • Patent number: 10347195
    Abstract: A display unit includes: a display section having an electrophoretic display device provided among a plurality of first electrodes and a second electrode, and displaying an image by switching a white, black, or gray-scale display state depending on an applied voltage; and a drive circuit driving the display section by varying a voltage applied to the first electrodes, while holding the second electrode at a common potential during a write period including frame period(s). When a first region of the display section has a first display state of white or black during a first write period, and an image of a second region thereof is changed while holding the first display state at the first region upon switchover from the first write period to a temporally-continued second write period, the drive circuit offsets the common potential toward a direction in which a voltage applied to the first region is raised.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: July 9, 2019
    Assignee: Sony Corporation
    Inventors: Yuki Oishi, Akihito Nishiike
  • Patent number: 10317728
    Abstract: Object: To provide a backlight device for a liquid crystal display device which can suppress occurrence of power loss in any of light emitting bodies, and a liquid crystal display device including the backlight device. Solution to Problem: In a cluster (161), arranged are two magenta light emitting bodies (131) including a blue light emitting element (143) with high drive voltage and red phosphors (151) covering the blue light emitting element (143), two green light emitting bodies (132), and one blue light emitting body (133). With this configuration, since two blue LED elements (143) are implemented also in two magenta light emitting bodies (131), the drive voltage of the magenta light emitting bodies (131) is substantially equal to the drive voltage of the green light emitting bodies (132) and the blue light emitting body (133).
    Type: Grant
    Filed: May 16, 2016
    Date of Patent: June 11, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yuhsaku Ajichi, Naoto Inoue
  • Patent number: 10304382
    Abstract: According to one embodiment, a display device includes a display panel in which pixel units are arranged, and a controller configured to generate image signals by multiplying display data externally supplied to each line by a luminosity adjustment factor, to supply the generated image signals to the pixel units, to accumulate power consumption of each line, and to execute black insertion if the accumulated power consumption is determined to be greater than power consumption of one previous display frame by a predetermined value, wherein the luminosity adjustment factor is acquired by substituting the power consumption of one previous frame to a decreasing function, and a display pattern including a plurality of continuing black display lines is synchronized with supply of the image signals and is displayed moving the same direction of a screen scanning direction of the display panel during the black insertion.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: May 28, 2019
    Assignee: JAPAN DISPLAY INC.
    Inventors: Takayuki Imai, Norio Nakamura
  • Patent number: 10283030
    Abstract: A shift register, a gate driver, a display panel and a driving method are provided. The shift register includes an input-reset circuit, which is connected with a pull-up node; and a driving circuit, which is connected with the pull-up node. The input-reset circuit is configured to: write a voltage of a first signal into the pull-up node in response to a second signal, in an input phase of forward scanning; write a voltage of a fourth signal into the pull-up node in response to a third signal, in a reset phase of forward scanning; write the voltage of the fourth signal into the pull-up node in response to the third signal, in an input phase of reverse scanning; and write the voltage of the first signal into the pull-up node in response to the second signal, in a reset phase of reverse scanning.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: May 7, 2019
    Assignees: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
    Inventors: Maoxiu Zhou, Xiaoye Ma, Peng Jiang, Haipeng Yang, Ke Dai, Yong Jun Yoon
  • Patent number: 10276108
    Abstract: The present application provides a method for adjusting backlight brightness levels of a display. A display region of the display is divided into a plurality of sub-display regions. Each sub-display region displays a sub-image region of a to-be-displayed image. A backlight brightness level of a sub-display region is adjustable. The method including: determining if white-image areas in a sub-image region satisfies a preset condition; and increasing the backlight brightness level of a sub-display region corresponding to the sub-image region if the white-image areas satisfy the preset condition.
    Type: Grant
    Filed: September 22, 2016
    Date of Patent: April 30, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD
    Inventors: Yifang Chu, Chengqi Zhou
  • Patent number: 10269297
    Abstract: A pixel circuit, a driving method of the pixel circuit, and a display panel, the pixel circuit includes a first sub-pixel circuit configured to write a first data voltage provided by the first data line under control of the first scan line, and generate a compensation voltage at the first node; at least one second sub-pixel circuit configured to perform threshold voltage compensation by the compensation voltage generated at the first node; the at least one second sub-pixel circuit is configured to write a second data voltage provided by the second data line under control of the second scan line based on a display mode.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 23, 2019
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xiaochuan Chen, Shengji Yang, Can Zhang, Lei Wang
  • Patent number: 10269996
    Abstract: A position sensitive detector includes a substrate, an absorber layer on the substrate, a barrier layer on the absorber layer, a contact layer on the barrier layer, and a first contact and a second contact on the contact layer. The barrier layer prevents a flow of majority carriers from the absorber layer to the contact layer. The position sensitive detector is sensitive to a lateral position between the first contact and the second contact of incident light on the contact layer.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: April 23, 2019
    Assignee: HRL Laboratories, LLC
    Inventors: Hasan Sharifi, Rajesh D. Rajavel, Terence J. De Lyon, Daniel Yap
  • Patent number: 10255839
    Abstract: A driver for a display panel includes a driving time accumulator, a ditherer, and a data signal generator. The driving time accumulator determines an accumulated driving time of the display panel. The ditherer determines an amount of dither based at least in part on the accumulated driving time, and performs a dithering operation on input image data with the determined amount of dither. The data signal generator generates a data signal for the display panel based at least in part on the input image data on which the dithering operation is to be performed.
    Type: Grant
    Filed: March 31, 2015
    Date of Patent: April 9, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae-Hoon Lee, Do-Hyung Ryu, Seung-Ho Park
  • Patent number: 10235956
    Abstract: A technique of, in the case of changing, at predetermined time intervals, a drive circuit for switching a gate line to a selected state, preventing a stopped drive circuit from malfunctioning is provided. Each of a plurality of drive circuits provided for each gate line in an active-matrix substrate includes: a selection circuit unit including an output switching element that is turned on to apply a voltage to the gate line in response to a control signal; an internal line connected to a gate terminal of the output switching element and the gate line; and a potential control circuit unit connected to the internal line for controlling a potential of the internal line in response to the control signal.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: March 19, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kohhei Tanaka, Takayuki Nishiyama, Takeshi Noma, Ryo Yonebayashi
  • Patent number: 10223972
    Abstract: The invention provides an OLED pixel driving circuit and OLED display device. The OLED pixel driving circuit uses 4T1C structure and switch (K). The first pin (K1) of switch (K) is connected to the drain of the third TFT (T3), the second pin (K2) connected to the DAC (DAC), and the third pin (K3) connected to the ADC (ADC). By the switch signal (Switch) controlling the switch (K), the first pin (K1) and the second pin (K3) are connected to enter the display mode, and by the switch signal (Switch) controlling the switch (K), the first pin (K1) and the third pin (K3) are connected to enter the sense mode, so that the ADC (ADC) senses the threshold voltage of the fourth TFT (T4), converted by ADC (ADC) for data compensation in the display mode. The invention can compensate, improve display uniform, improve pixel aperture ratio and reduce manufacturing cost.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: March 5, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Jimu Kuang, Hongjun Xie