Thin Film Tansistor (tft) Patents (Class 345/92)
  • Patent number: 10706767
    Abstract: A shift register unit circuit includes an input circuit configured to supply an active potential to a first node responsive to an input pulse from an input terminal being active and to supply an inactive potential to the first node responsive to a reset pulse from a reset terminal being active; an output circuit configured to supply a first clock signal to an output terminal responsive to a second node being at the active potential and to cause a potential at the second node to be changed from the active potential to further away from the inactive potential responsive to a transition of a potential at the output terminal transitioning from the inactive potential to the active potential; and a potential control circuit configured to restrict a change in the potential at the first node caused by the transition of the potential at the output terminal from the inactive potential to the active potential.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: July 7, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., ORDOS YUANSHENG OPTOELECTRONICS CO., LTD.
    Inventors: Jun Fan, Wei Li, Fuqiang Li
  • Patent number: 10706761
    Abstract: A control method for a display panel is provided, the display panel includes multiple gate lines, multiple data lines arranged to intersect with the gate lines in an insulative manner, multiple sub-pixels arranged in an array and a demultiplexer. The N data lines for charging the sub-pixels with different colors are connected to one signal input terminal through the demultiplexer, N is an integer greater than 1. The control method includes charging the sub-pixels connected to the demultiplexer in a direct charging manner, and the sub-pixels with the same color have the same charging time period in a preset period.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: July 7, 2020
    Assignee: WUHAN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Yue Li, Renyuan Zhu, Dongxu Xiang, Yana Gao, Xingyao Zhou
  • Patent number: 10698273
    Abstract: The image display device of the present invention includes a substrate. The substrate includes: a first metal layer, a first insulating layer, a second metal layer, a second insulating layer, and a third metal layer stacked in the stated order; a scanning signal line; and a gate driver. The gate driver includes a unit circuit including an output control transistor. The scanning signal line is provided in the second metal layer in the display region. The substrate includes a first additional line electrically connected to a gate electrode of the output control transistor. The first additional line includes a first additional line portion provided in the first metal layer in the display region. The first additional line portion overlaps the scanning signal line in the display region via the first insulating layer.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: June 30, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Masahiro Yoshida
  • Patent number: 10692419
    Abstract: Provided are a display panel, a display device and a display method of the display panel. The display panel includes a pixel array, where the pixel array includes a plurality of pixel groups and each of the plurality of pixels group includes first-type pixel units and second-type pixel units; and a drive circuit configured to provide a drive signal for the pixel array. A display mode of the display panel includes a high-definition display mode in which within one-frame time, the first-type pixel units and the second-type pixel units collectively display a same to-be-displayed picture; a stereoscopic display mode in which the first-type pixel units display a user's left-eye picture within first time and the second-type pixel units display a user's right-eye picture within second time; and a power saving display mode in which the first-type pixel units display a picture and the second-type pixel units do not perform displaying.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: June 23, 2020
    Assignee: Shanghai Tianma AM-OLED Co., Ltd.
    Inventors: Jun Lin, Shuang Cheng, Lei Wen, Honghu Ma, Jinghua Niu, Ping An
  • Patent number: 10672332
    Abstract: A pixel compensation circuit and a driving method thereof, and a display device. The pixel compensation circuit includes: a driving sub-circuit; a light-emitting device; an initialization sub-circuit, configured to initialize a control electrode of the driving sub-circuit; a data writing sub-circuit, configured to provide a data signal to the control electrode of the driving sub-circuit; a voltage input sub-circuit, configured to provide a signal of the first power supply terminal to the first electrode of the driving sub-circuit; a storage and voltage division sub-circuit, configured to store a voltage of the first electrode of the driving sub-circuit, and when the control electrode of the driving sub-circuit is floating, maintain stability of a voltage difference between the control electrode and the first electrode of the driving sub-circuit; and a threshold compensation sub-circuit, configured to write a threshold voltage of the driving sub-circuit into the first electrode of the driving sub-circuit.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: June 2, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Sangwon Lee, Min Ho Ko, Sang Hun Kang, Young Yik Ko, Wanli Dong
  • Patent number: 10665167
    Abstract: A pixel circuit and a driving method, a display device. The pixel circuit includes: a main driving circuit, configured to, under control of a scanning signal line and a data signal line, output a main driving current signal to a fusing circuit; the fusing circuit configured to enable a light emitting circuit and the main driving circuit to be disconnected from each other; a fusing control circuit configured to, under control of a signal input terminal, enable the light emitting circuit and the main driving circuit to be disconnected from each other; a standby driving circuit configured to output a standby driving current signal to a switching circuit; the switching circuit configured to, under control of an input signal of a control line, connect the standby driving circuit to the light emitting circuit; and the light emitting circuit configured to emit light by using the standby driving current signal.
    Type: Grant
    Filed: September 22, 2017
    Date of Patent: May 26, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Jie Fu, Xiaochuan Chen, Shengji Yang, Dongni Liu, Lei Wang, Pengcheng Lu, Li Xiao, Han Yue, Yankai Gao, Mingfu Han
  • Patent number: 10665166
    Abstract: A pixel for a display panel includes first and second transistors, first and second capacitors, and an organic light emitting diode. The first transistor has a gate electrode connected to a first node, a first electrode connected to a first power source, and a second electrode connected to a second node. The second transistor has a gate electrode connected to a scan line, a first electrode connected to the first node, and a second electrode connected to the second node. The organic light emitting diode has a first electrode connected to the second node and a second electrode connected to a second power source. The first capacitor has a first electrode connected to a third power source and a second electrode connected to the first node. The second capacitor has a first electrode connected to a data line and a second electrode connected to the second node.
    Type: Grant
    Filed: October 6, 2017
    Date of Patent: May 26, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jun-Hyun Park, Young-Wan Seo, An-Su Lee, Bo-Yong Chung, Kang-Moon Jo, Chong-Chul Chai
  • Patent number: 10656477
    Abstract: Each of pixels arranged in a matrix has at least first and second subpixels defined to include an electrode pair of a subpixel electrode and a counter electrode facing each other with a liquid crystal layer interposed therebetween. A scanning signal is applied from a scanning signal line of each row of the matrix to a gate electrode of a TFT for applying a data signal from a source signal line to the subpixel electrode included in each of the first and second subpixels. A discharge capacitor electrode is connected to the subpixel electrode of the second subpixel through another TFT. When the signal width of the scanning signal is within a range from M times (M is 0 or 1) the length of 1 H to (M+1) times, a discharge signal line is connected to the scanning signal line, which is scanned after N horizontal scanning periods (N is M+2, that is, 2 or 3), by a signal-to-signal connection line.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: May 19, 2020
    Assignee: Sakai Display Products Corporation
    Inventors: Kentaro Irie, Masae Kitayama
  • Patent number: 10656486
    Abstract: Disclosed is a display panel, comprising a signal line, a test line for testing a signal line of the signal line, and a dummy line. The dummy line extends in a direction substantially consistent with that of the test line for preventing occurrence of electrostatic discharge on the test line. The test line and the dummy line have an overlapping region with the signal line, respectively, and the ratio of the area of the overlapping region between the dummy line and the signal line to the area of the dummy line is smaller than the ratio of the area of the overlapping region between the test line and the signal line to the area of the test line. A display device comprising the display panel is further disclosed.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: May 19, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Jingang Hao
  • Patent number: 10657915
    Abstract: A scan signal compensating method and a scan signal compensating device based on a scan driving circuit are provided. The method exemplary includes: acquiring a scan signal compensation voltage value in a detecting period; adjusting a clock signal(s) and a DC voltage source(s) inputted to the gate driving circuit according to the scan signal compensation voltage value, in an adjusting period. In particular, after the scan signal compensation voltage value is obtained, amplitudes of the clock signal(s) and the DC voltage source(s) inputted into the gate driving circuit are adjusted, thereby solving problems of ghost and flicker of a display device caused by pixel capacitance leakage in the active area resulting from the drift of I-V characteristic curve of TFTs in the active area suffered from a long-term voltage difference.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: May 19, 2020
    Assignee: XIANYANG CAIHONG OPTOELECTRONICS TECHNOLOGY CO., LTD
    Inventor: Yuan-Liang Wu
  • Patent number: 10658352
    Abstract: There is provided a protective circuit, an array substrate and a display panel. The protective circuit includes: a control sub-circuit, having a first end electrically connected to a voltage input terminal and a second end configured to output a common voltage signal supplied by the voltage input terminal; and a discharge sub-circuit, having a first end electrically connected to the second end of the control sub-circuit and a second end electrically connected to at least one data line. The discharge sub-circuit releases electric charges on the at least one data line under the control of the common voltage signal supplied from the control sub-circuit.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: May 19, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xueguang Hao, Yong Qiao, Xinyin Wu
  • Patent number: 10650736
    Abstract: A display apparatus and a voltage calibration method are disclosed. The display apparatus includes a ramp voltage generator, a ramp counter and a timing controller. The ramp voltage generator is configured to generate a ramp voltage. The ramp counter is coupled to the ramp voltage generator and configured to start counting when the ramp voltage generator generates the ramp voltage. The timing controller is coupled to the ramp voltage generator and the ramp counter respectively. When the ramp voltage is increased to be equal to a reference voltage, the timing controller compares an instant count value of the ramp counter with a default value and selectively calibrates a rising slope of the ramp voltage generated by the ramp voltage generator according to a comparing result of the instant count value and the default value.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: May 12, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chi-Hsiang Oulee, Tzong-Yau Ku, Jun-Ren Shih
  • Patent number: 10651413
    Abstract: A light-emitting device includes an organic light-emitting layer, a first electrode disposed at one side of the organic light-emitting layer, and a second electrode disposed at the same side of the organic light-emitting layer as the first electrode. The first electrode is spaced apart from the second electrode. A display panel includes a substrate including a display region and a touch sensing region defined along a substrate-horizontal direction, at least one light-emitting device disposed over the substrate in the display region, and at least one touch sensor disposed over the substrate in the touch sensing region. The display region and the touch sensing region are not overlapped.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: May 12, 2020
    Assignee: INT TECH CO., LTD.
    Inventors: Ker Tai Chu, Kuo-Cheng Hsu
  • Patent number: 10643562
    Abstract: A display device including applying a positive polarity first voltage with respect to the plurality of first electrodes to the plurality of second electrodes, and applying a voltage according to an image signal to one of the plurality of first electrodes in a first time period, applying a negative polarity second voltage with respect to the plurality of first electrodes to the plurality of second electrodes, and applying a voltage according to an image signal to one of the plurality of first electrodes in a second time period, and applying to the plurality of first electrodes a common voltage larger than a minimum value of an allowable range of a voltage according to an image signal applied to one of the plurality of first electrodes and determined in a range equal to or less than the first voltage in a third time period.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: May 5, 2020
    Assignee: Japan Display Inc.
    Inventor: Tadafumi Ozaki
  • Patent number: 10644040
    Abstract: The present invention discloses an array substrate for forming a display panel, comprising: a substrate; a thin-film transistor disposed on the substrate, the thin-film transistor comprising a drain electrode; a planarization layer disposed on the thin-film transistor, the planarization layer being provided with a first via hole for exposing the drain electrode; a pixel electrode layer disposed on the surface of the planarization layer away from the substrate, the pixel electrode layer covering the first via hole and being in contact with the drain electrode; and a photoresist layer covering the pixel electrode layer, and the photoresist layer filling the first via hole which is covered with the pixel electrode layer. The present invention solves the issues caused by the height difference in products.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: May 5, 2020
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Chen Chen
  • Patent number: 10643514
    Abstract: A display device comprises: inspection transistors electrically connected to signal lines respectively; an inspection wiring through which an inspection signal is supplied to the inspection transistors; and an abnormality determination unit that determines whether the display panel is abnormal. The signal line is electrically connected to a gate electrode of the inspection transistor, and the abnormality determination unit determines whether the display panel is abnormal based on a voltage level of the inspection signal outputted from a source electrode of the inspection transistor.
    Type: Grant
    Filed: August 8, 2018
    Date of Patent: May 5, 2020
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroaki Goto, Masafumi Hirata
  • Patent number: 10636378
    Abstract: A scan signal compensating method, a scan signal compensating circuit and a display device are provided. The compensating method includes: disposing a reference TFT; obtaining a drain current of the reference TFT; acquiring a compensation voltage value according to the drain current; and performing voltage compensation to a GOA driving circuit according to the compensation voltage value. By disposing the reference TFT to acquire a drift of I-V characteristic curve of a certain TFT of the GOA driving circuit, obtaining the compensation voltage value according to a drifted drain current of the reference TFT and compensating a driving voltage of the GOA driving circuit, the problem of display image sticking or flickering caused by the drift of I-V characteristic curve of the TFT in the GOA driving circuit resulting from a long-term bias voltage can be solved consequently.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: April 28, 2020
    Assignee: XIANYANG CAIHONG OPTOELECTRONICS TECHNOLOGY CO., LTD
    Inventor: Yuan-Liang Wu
  • Patent number: 10629283
    Abstract: Display panel and display device are provided. The display panel includes scan lines and a scan driving circuit including shift registers in a cascaded configuration and multiplexers. One shift register is connected to one multiplexer. One multiplexer is connected to M scan lines and includes M control units connected with the scan lines in a one-to-one correspondence. Output terminals of switch branches in a control unit are connected to one scan line. An input terminal of a main switch branch is connected to an output terminal of the shift register. An input terminal of an auxiliary switch branch is connected to a first signal line. In one scanning period, in M consecutive time stages, a signal from each shift register to the multiplexer includes effective voltage levels; the main switch branches in the control units are switched on sequentially, and output the scanning signal to the M scan lines sequentially.
    Type: Grant
    Filed: October 23, 2018
    Date of Patent: April 21, 2020
    Assignee: WUHAN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Jiazhu Zhu, Shanfu Yuan, Tao Peng, Ruiyuan Zhou
  • Patent number: 10608120
    Abstract: A multi-channel thin film transistor (“TFT”) includes: a gate electrode; a semiconductor including a first channel area, which operates within a first driving range and has a first threshold voltage, and a second channel area which operates within a second driving range smaller than the first driving range and has a second threshold voltage, where an absolute value of the second threshold voltage is greater than an absolute value of the first threshold voltage; a first electrode connected to an end of the semiconductor; and a second electrode connected to another end of the semiconductor.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: March 31, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Hwangsup Shin
  • Patent number: 10607547
    Abstract: A display apparatus includes a voltage generator which generates an initial controlling signal which comprises a high voltage, a middle voltage and a low voltage, where the initial controlling signal swings from the middle voltage to the low voltage after a plurality of gate signals is simultaneously dropped from a high voltage to a low voltage thereof.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: March 31, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Gunwoo Yang, Cholho Kim, Wonjun Lee
  • Patent number: 10608052
    Abstract: A display substrate includes a first switching element electrically connected to a gate line extending in a first direction and a data line extending in a second direction crossing the first direction, an organic layer disposed on the first switching element, a shielding electrode disposed on the organic layer and overlapping the data line, a pixel electrode disposed on the same layer as the shielding electrode and a light-blocking pattern disposed on the shielding electrode and adjacent to a corner of the pixel electrode
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: March 31, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyung-June Kim, Wan-Soon Im
  • Patent number: 10606138
    Abstract: A display substrate repairing method, a display substrate repairing system, a display substrate and a display panel are provided. The display substrate repairing method includes: forming, in the case that a signal line of the display substrate is detected to be open-circuited or short-circuited, a repair line at a disconnected portion of the signal line being open-circuited or a disconnected portion of the signal line formed during a short circuit repairing process; forming a protective layer at least in an area where the repair line is located.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: March 31, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xingfeng Ren, Yaoyao Feng, Yongjiu Cheng
  • Patent number: 10607058
    Abstract: Provided are a display panel and a display device. The display panel includes a display assembly and a fingerprint recognition assembly. The display assembly includes a base substrate, a plurality of pixel driving circuit units disposed on one side of the base substrate and at least two kinds of metal wires extending along a first direction, the plurality of pixel driving circuit units are arranged in a matrix along the first direction and a second direction, and a first gap region is formed between adjacent two of the plurality of pixel driving circuit units in the first direction. The display panel provided by the present disclosure provides the at least two kinds of metal wires to include a plurality of first type metal wires and a plurality of second type metal wires.
    Type: Grant
    Filed: July 31, 2018
    Date of Patent: March 31, 2020
    Assignee: Shanghai Tianma Micro-Electronics Co., Ltd.
    Inventors: Lihua Wang, Yang Zeng, Lingxiao Du, Qing Zhang, Haochi Yu
  • Patent number: 10600363
    Abstract: A method for driving an array substrate, the array substrate includes M rows of pixel units, each of the pixel units includes a shared driving circuit and N light-emitting components connected to the shared driving circuit, the method includes: in a period of scanning a frame of image, providing first to Nth scanning stages uniformly distributed to each row of pixel units, each of the scanning stages has a duration T, and any one of N scanning stages of an ith row of pixel units does not overlap with any one of N scanning stages of a jth row of pixel units; i, j and M are all positive integers, and 1i, jM, i?j; and N is a positive integer not less than 2; and driving, by the shared driving circuit, the N light-emitting components to emit light.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: March 24, 2020
    Inventors: Qi Li, Dong Qian, Duzen Peng
  • Patent number: 10586500
    Abstract: The present disclosure provides a multiplexed type driver circuit, a driving method, and a display. The driver circuit may include: a fourth switch couple to a first switch and a first sub-pixel, a fifth switch couple to a second switch and a second sub-pixel, a sixth switch couple to a third switch and a third sub-pixel. The driving method may include: controlling ON and OFF of the first switch to input a data signal to the first sub-pixel; controlling ON and OFF of the second switch to input a data signal to the second sub-pixel; controlling ON of the third switch and OFF of the sixth switch to input a data signal to the third sub-pixel; and turning off the third switch after turning off the sixth switch. The durations of data signal input to the first sub-pixel, the second sub-pixel and the third sub-pixel are identical.
    Type: Grant
    Filed: October 21, 2018
    Date of Patent: March 10, 2020
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.
    Inventor: Linfeng Liu
  • Patent number: 10580374
    Abstract: A co-gate electrode between pixels structure includes a first pixel and a second pixel. The first pixel has a first control switch is electrically connected to a main control switch. The main control switch selectively receives an external voltage and then transmits the external voltage to the first control switch. The first control switch selectively receives the external voltage, lest the external voltage transmitted to the first pixel to charge or discharge establish a voltage drop. The second pixel has a second control switch, which is electrically connected to the main control switch to selectively receive the external voltage transmitted by the main control switch, lest the external voltage that is transmitted to the second pixel to charge or discharge establish a voltage drop. The present invention is used for a panel with pixels of small area and high resolution.
    Type: Grant
    Filed: May 7, 2018
    Date of Patent: March 3, 2020
    Assignee: Giantplus Technology Co., Ltd.
    Inventors: Che-Yao Wu, Kai-Ju Chou, I-Ta Jiang
  • Patent number: 10571770
    Abstract: A liquid crystal display includes a display panel including first and second subpixels, where the first subpixel includes a first switching device including a first electrode connected to the j-th data line, a second electrode connected to a first subpixel electrode and a gate electrode connected to an i-th gate line, the second subpixel includes a second switching device including a first electrode connected to a j-th data line, a second electrode connected to a second subpixel electrode and a gate electrode connected to the i-th gate line, a third switching device including a first electrode connected to the second subpixel electrode and a gate electrode connected to the i-th gate line, and a fourth switching device including a first electrode connected to the j-th data line, a second electrode connected to the first electrode of the third switching device and a gate electrode connected to the i-th gate line.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: February 25, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Keum Dong Jung, Seung Hwan Moon, Seong Young Lee
  • Patent number: 10571769
    Abstract: It is possible to reduce a size of a lower frame region to ensure a wiring corrosion margin equivalent to that of a conventional technique. In a display device, a video signal wiring arranged in the lower frame region includes, in a region between a terminal section (terminal) and a video signal line, a first wiring formed on a first wiring layer and having one end connected to the terminal section to which a video signal line driving circuit is connected, a second wiring formed on a second wiring layer different from the first wiring layer and having one end connected to the other end of the first wiring, and a third wiring formed on the first wiring layer and having one end connected to the other end of the second wiring. The other end of the third wiring is connected to the video signal line via a fourth wiring formed on the second wiring layer, and the first wiring layer is formed on the side closer to an array substrate than to the second wiring layer.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: February 25, 2020
    Assignee: Japan Display Inc.
    Inventors: Hiroyuki Abe, Kentaro Agata
  • Patent number: 10553619
    Abstract: An array substrate includes a substrate, a barrier layer disposed on the substrate, a buffer layer disposed on the barrier layer, a first insulating layer disposed on the buffer layer, a second insulating layer disposed on the first insulating layer, a plurality of wiring patterns disposed between the first insulating layer and the second insulating layer and/or on the second insulating layer. In addition, the wiring patterns are separated from each other, and extend toward a side of the substrate. The array substrate further includes a recess pattern disposed adjacent the wiring patterns and recessed from a top surface of the second insulating layer to expose at least part of a top surface of the substrate, and an organic insulating layer disposed on the second insulating layer and exposing at least part of a portion of the top surface of the substrate which is exposed by the recess pattern.
    Type: Grant
    Filed: December 1, 2017
    Date of Patent: February 4, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Won Kyu Kwak
  • Patent number: 10546539
    Abstract: Disclosed herein is an organic light emitting diode (OLED) display device including an OLED display panel including a non-active area and an active area, having a plurality of gate lines and a plurality of data lines disposed in the active area, and having a plurality of subpixels arranged at intersections between the gate lines and the data lines in a matrix, a gate driver disposed in the non-active area of the OLED display panel to supply a scan pulse to the plurality of gate lines, and a bootstrap capacitor for preventing output loss of the scan pulses of the gate driver in the active area of the OLED display panel.
    Type: Grant
    Filed: August 29, 2018
    Date of Patent: January 28, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Kyung-Min Kim, In-Hyo Han, Seok Noh
  • Patent number: 10529284
    Abstract: A pixel capable of improving display quality may include an organic light emitting diode, a first transistor configured to control, in response to a voltage of a first node, current flowing from a first driving power source to a second driving power source via the organic light emitting diode, a second transistor coupled between the first node and a second electrode of the first transistor, and configured to be turned on when a scan signal is supplied to a scan line, a storage capacitor coupled between an initialization power source and the first node, a first capacitor coupled between the second electrode of the first transistor and a data line, and a second capacitor coupled between the first node and the second electrode of the first transistor. A display including such pixels also is disclosed.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: January 7, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Gun Woo Yang, Gi Chang Lee, Won Jun Lee, Won Gyun Kim
  • Patent number: 10528166
    Abstract: A flexible display device including a display panel configured to display an image and including first and second bending areas configured to be bent along first and second folding axes, respectively, and a touch sensing unit disposed on the display panel. The touch sensing unit includes a base insulation layer, a first touch electrode part disposed on a first surface of the base insulation layer and overlapping the first bending area to detect an external input, and a second touch electrode part disposed on a second, opposing surface of the base insulation layer and overlapping the second bending area to detect an external input. A portion of the display panel is disposed between the first folding axis and the touch sensing unit, and a portion of the touch sensing unit is disposed between the second folding axis and the display panel, when the flexible display device is bent.
    Type: Grant
    Filed: April 21, 2017
    Date of Patent: January 7, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Mi-ae Park, Sungku Kang
  • Patent number: 10515605
    Abstract: A display device includes: a substrate; a gate line, a dummy gate line, a data line, a dummy data line, a pixel electrode, and a dummy pixel electrode, each disposed on the substrate; a switching element connected to the gate line, the data line, and the pixel electrode; a dummy switching element connected to the dummy gate line, the dummy data line, and the dummy pixel electrode; a compensation circuit detecting a change amount of a drain current based on drain currents generated from the dummy pixel at different time points, and detecting a change amount of a gate voltage of the dummy switching element based on the change amount of the drain current; a power supply circuit outputting a corrected gate-off voltage based on the change amount of the gate voltage; and a gate driver applying the corrected gate-off voltage to the gate line.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: December 24, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Hongbeom Lee, Jihoon Shin, Yeunmo Yeon, Eunkyung Kim, Minho Park, Chowon Park, Yina Yun
  • Patent number: 10510301
    Abstract: A scan driver is integrated to include multiple drivers in a peripheral area of a display. The drivers output gate, emission, and/or other signals for driving pixel circuits in the display based on one or more clock signals.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: December 17, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ji-Su Na, Ji-Hye Kong, Young-In Hwang
  • Patent number: 10510309
    Abstract: A display panel for displaying an image is provided with a plurality of pixels arranged in a matrix. Each pixel includes one or more units each including a plurality of subunits. Each subunit includes a transistor in which an oxide semiconductor layer which is provided so as to overlap a gate electrode with a gate insulating layer interposed therebetween, a pixel electrode which drives liquid crystal connected to a source or a drain of the transistor, a counter electrode which is provided so as to face the pixel electrode, and a liquid crystal layer provided between the pixel electrode and the counter electrode. In the display panel, a transistor whose off current is lower than 10 zA/?m at room temperature per micrometer of the channel width and off current of the transistor at 85° C. can be lower than 100 zA/?m per micrometer in the channel width.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: December 17, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Shunpei Yamazaki
  • Patent number: 10504473
    Abstract: A display apparatus includes: a plurality of pixel blocks, each pixel block of the plurality of pixel blocks including a first pixel electrode connected to a first switching element and a second pixel electrode connected to a second switching element; gate lines which extend along a first direction and include a first gate line connected to the first switching element and a second gate line connected to the second switching element; and data lines which extend along a second direction intersecting the first direction. A gate voltage is applied to the first gate line before the second gate line, and the first pixel electrode of each of the pixel blocks displays a same color.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: December 10, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sung-Man Kim, Hong-Woo Lee, Jong-Hwan Lee, Hyeon-Hwan Kim, Jong-Hyuk Lee
  • Patent number: 10490132
    Abstract: In an embodiment of the present invention, a display device includes a display unit including a plurality of pixels, a first power supply unit configured to supply a first power voltage to the display unit, and a second power supply unit configured to cyclically supply a second power voltage to the display unit during a frame period.
    Type: Grant
    Filed: August 24, 2016
    Date of Patent: November 26, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sung Un Park, Tae Wook Kim, Hyung Min Shin, Ju Bong An, Yeon Shil Jung
  • Patent number: 10490149
    Abstract: The present disclosure relates to a discharging circuit and a driving method thereof, and a display device. The discharging circuit of the present disclosure includes a control circuit, a time delay circuit, a first discharging circuit and a second discharging circuit. The control circuit is configured to control potential of a control signal output terminal of the control circuit. The time delay circuit is configured to delay a switched-on time of the second discharging circuit. The first discharging circuit is configured to pull down a potential of a data signal terminal to a potential of a common voltage terminal, under control of a control signal output from the control circuit. The second discharging circuit is configured to release the potential of the common voltage terminal and the potential of the data signal terminal under the control of the time delay circuit.
    Type: Grant
    Filed: October 17, 2017
    Date of Patent: November 26, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Shuai Chen, Zhi Zhang, Cheng Zuo, Heecheol Kim, Taeyup Min, Zhihui Wang, Xiaojun Zuo, Xing Dong, Wangjing Bai, Kangpeng Dang
  • Patent number: 10488727
    Abstract: Provided are an array substrate, a liquid crystal display panel, and a pixel charging method. The array substrate comprises: a plurality of pixel units distributed in a matrix, a first thin-film transistor, and a second thin-film transistor; the first thin-film transistor and the second thin-film transistor corresponding to each pixel unit; each pixel unit comprising a first specific sub-pixel unit, the first specific sub-pixel unit comprising a first pixel electrode and a second pixel electrode insulated from the first pixel electrode; for each pixel unit, a drain electrode of the first thin-film transistor electrically connected with the first pixel electrode, a drain electrode of the second thin-film transistor electrically connected with the second pixel electrode. The present technical solution is mainly for use in the eye protection mode of liquid crystal display products, for improving picture smear problem caused by increase of response time of liquid crystal.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: November 26, 2019
    Assignee: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Liting Fang, Qiong Song, Rong Chen
  • Patent number: 10488980
    Abstract: Reduction of the effects of differences in parasitic capacitances in touch screens is provided. A touch screen can include multiple display pixels with stackups that each include a first element and a second element. For example, the first element can be a common electrode, and the second element can be a data line. The display pixels can include a first display pixel including a third element connected to the first element, and the third element can contribute to a first parasitic capacitance between the first and second elements of the first display pixel, for example, by overlapping with the second element. The touch screen can also include a second display pixel lacking the third element. The second display pixel can include a second parasitic capacitance between the first and second elements of the second display pixel. The first and second parasitic capacitances can be substantially equal, for example.
    Type: Grant
    Filed: February 25, 2016
    Date of Patent: November 26, 2019
    Assignee: Apple Inc.
    Inventors: Shih-Chang Chang, Steven P. Hotelling, Cheng-Ho Yu
  • Patent number: 10490147
    Abstract: According to one embodiment, a display device includes a pair of substrates including a display area in which pixels are arranged, pixel electrodes and memories provided in the pixels, signal lines supplied with digital signals, switching elements connecting the memories and the signal lines, scanning lines supplied with scanning signals, a first driver unit, and a second driver unit. The first driver unit is provided in a peripheral area around the display area, and supplies the digital signal to the signal line. The second driver unit is provided in the peripheral area, and supplies the scanning signal to the scanning line. In the display device, at least a part of the first driver unit is provided between the display area and the second driver unit.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: November 26, 2019
    Assignee: Japan Display Inc.
    Inventor: Takehiro Shima
  • Patent number: 10482813
    Abstract: A power off method of a display device includes: detecting a power off operation on the display device; setting, when the power off operation is detected, a same potential in one electrode and an other electrode of a capacitance element in each of a plurality of pixel circuits; and stopping power supply to a display panel immediately after the same potential is set.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: November 19, 2019
    Assignee: JOLED INC.
    Inventor: Hitoshi Tsuge
  • Patent number: 10475381
    Abstract: According to an aspect of the present disclosure, an organic light emitting display device includes a plurality of pixels each including a pixel driving circuit. The plurality of pixels includes an organic light emitting diode and a driving TFT configured to control driving of the organic light emitting diode and including a gate node as a first node, a source node as a second node, and a drain node. Also, the plurality of pixels includes first to third switching TFTs electrically connected to the driving TFT and first and second storage capacitors configured to store a voltage to be applied to the driving TFT DT. Further, the plurality of pixels includes a coupling capacitor connected to a gate node of the third switching TFT so as to increase a voltage to be applied to the gate node of the driving TFT.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: November 12, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Siu Yoon, Seung Chan Choi, Jun Ho Lee, Sung Bin Ryu, Ki Tae Kim
  • Patent number: 10460694
    Abstract: According to one embodiment, a display device which includes a plurality of signal line drivers which drive a display area of a display panel by dividing the display area into a plurality of division display areas is provided. The plurality of signal line drivers include a master signal line driver and a slave signal line diver. Each of the master signal line driver and the slave signal line driver drives at least one of the division display areas. An outward path outputs a direct-current voltage from the master signal line driver to the slave signal line driver. A return path is electrically connected to and is contiguous with the outward path, and returns the direct-current voltage to the master signal line driver.
    Type: Grant
    Filed: December 18, 2018
    Date of Patent: October 29, 2019
    Assignee: Japan Display Inc.
    Inventors: Hirokazu Seki, Yasufumi Hagiwara
  • Patent number: 10460650
    Abstract: A display device includes a display including a plurality of LED lines, a scan driver for successively supplying a power to the plurality of LED lines, and a processor for controlling the scan driver to successively supply the power to the plurality of LED lines in a repeated manner for each of a plurality of sub-periods that form a scan period and changing a turn-on order of the plurality of LED lines for each of the plurality of sub-periods.
    Type: Grant
    Filed: August 9, 2017
    Date of Patent: October 29, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Byeong-cheol Hyeon
  • Patent number: 10438529
    Abstract: A display device includes: a display panel including a display area, and a peripheral area disposed in the vicinity of the display area; a scan driver including a plurality of stages integrated on the peripheral area; a plurality of gate lines connected to the plurality of stages, respectively; and a plurality of pixel rows in the display area and connected with the plurality of gate lines, respectively. The plurality of stages and the plurality of pixel rows are each arranged in a first direction in a line, the peripheral area includes a fan-out region between the plurality of stages and the plurality of pixel rows, and at least one of the plurality of gate lines in the fan-out region is inclined with respect to the first direction, and a second direction perpendicular to the first direction.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: October 8, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Soo Baek, Se Hyoung Cho, Dong-Gyu Kim, Dong-Hyeon Ki
  • Patent number: 10431155
    Abstract: A display device includes a display panel including pixels; a sensor configured to generate sensing data by measuring a current flowing through each of the pixels based on a reference voltage; and a compensator to generate stress data by calculating stress of the pixels based on input data provided from an external component and to generate degradation data by compensating a variation of the sensing data based on the stress data.
    Type: Grant
    Filed: June 15, 2017
    Date of Patent: October 1, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Hyun Moon, Dong-Won Lee
  • Patent number: 10431177
    Abstract: According to an aspect, a display apparatus includes: a plurality of first pixels to which at least one color is allocated; and a second pixel to which a high luminance color having higher luminance than luminance of the color of the first pixels is allocated. The first pixels are driven at a first drive frequency. The second pixel is driven at a second drive frequency higher than the first drive frequency.
    Type: Grant
    Filed: March 7, 2017
    Date of Patent: October 1, 2019
    Assignee: Japan Display Inc.
    Inventor: Takayuki Nakanishi
  • Patent number: 10424750
    Abstract: A stretchable display panel, a manufacturing method of the stretchable display panel and a stretchable display apparatus are provided. The manufacturing method of the stretchable display panel includes: providing a first substrate; defining a plurality of pixel regions and a plurality of stretchable regions in the first substrate; each stretchable region being located between two adjacent pixel regions; forming a pixel device in each pixel region, and forming a conducting wire connecting two adjacent pixel regions in each stretchable region; wherein a length of the conducting wire is greater than a distance between two adjacent pixel regions. In this way, the stretchable display panel may achieve a great amount of deformation, and the display panel can be bent conveniently.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: September 24, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Macai Lu
  • Patent number: 10410601
    Abstract: A display panel and a display device are provided. The display panel has a pixel region and a frame region surrounding the pixel region. The pixel region includes sub-pixels each including a first transistor and a pixel electrode. The plurality of sub-pixels includes display sub-pixels and dummy sub-pixels. At least part of the dummy sub-pixels are antistatic sub-pixels. A data line is configured to provide a driving signal to the display sub-pixels. A scan line is configured to provide scan signal to the display sub-pixels. A first reference signal line is configured to provide static protection reference signal to the antistatic sub-pixels. The first gate electrode of the first transistor of the antistatic sub-pixel is connected to the first drain electrode and a first reference signal line, and the first source electrode of the first transistor of the antistatic sub-pixel is connected to the data line.
    Type: Grant
    Filed: September 29, 2018
    Date of Patent: September 10, 2019
    Assignee: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Liangliang Bei, Hao Wu, Wei Wu, Guozhao Chen