Electroluminescent Patents (Class 345/76)
  • Patent number: 11122660
    Abstract: An electronic device has a light emitting unit driving circuit. The driving circuit has a first driving transistor, a second driving transistor, and a light emitting unit. The first driving transistor has a first channel width and a first channel length and is used to provide a first current. The second driving transistor has a second channel width and a second channel length and is used to provide a second current. The light emitting unit is coupled to the first driving transistor and the second driving transistor for receiving at least one of the first current and the second current to emit light. A ratio of the first channel width to the first channel length is greater than a ratio of the second channel width to the second channel length.
    Type: Grant
    Filed: December 4, 2019
    Date of Patent: September 14, 2021
    Assignee: InnoLux Corporation
    Inventors: Chien-Hsueh Chiang, Tsau-Hua Hsieh
  • Patent number: 11120736
    Abstract: A pixel circuit including a driving transistor, a light emission element, a compensation circuit, a storage capacitor, and a writing circuit is provided. The light emission control circuit is configured to selectively conduct the light emission element to the driving transistor. The compensation circuit is coupled with the light emission control circuit and a control terminal of the driving transistor, and is configured to form a diode-connected structure with the driving transistor. The storage capacitor includes a first terminal and a second terminal. The first terminal of the storage capacitor is coupled with the control terminal of the driving transistor, and the light emission control circuit is configured to selectively conduct the second terminal of the storage capacitor to a first power terminal. The writing circuit is configured to provide different voltages to the first terminal of the storage capacitor and the second terminal of the storage capacitor.
    Type: Grant
    Filed: July 3, 2020
    Date of Patent: September 14, 2021
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Chia-En Wu, Ming-Hsien Lee, Wei-Chia Chiu, Kuan-Yu Chen
  • Patent number: 11120731
    Abstract: A driving circuit for a display panel and a method of driving the same are provided. The driving circuit includes that, when the time control chip is at an initialized state, the enabling control module controls the logic control module to turn off; and when the time control chip is at a state after the initialized state is finished the enable control module controls the logic control module to turn on to receive the modulating data provided by the time control chip.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: September 14, 2021
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Bo Xiao
  • Patent number: 11114031
    Abstract: The present disclosure discloses a current-driven display device that uses an internal compensation method and can display a good-quality image with no bright dots that are not included in intended display content. In a pixel circuit of an organic EL display device, a voltage of a gate terminal of a drive transistor is initialized before the voltage of a data signal line is written to a holding capacitor via the diode-connected drive transistors. At this time, an initialization voltage is applied to the gate terminal via a display element initialization transistor, a second light emission control transistor, and a threshold compensation transistor. By initializing the gate terminal with a configuration not including an initialization transistor provided between the gate terminal and an initialization voltage supply line as in the related art, voltage drop at the gate terminal due to leakage current of the transistor in an off state is suppressed.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: September 7, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Tetsuya Ueno
  • Patent number: 11114026
    Abstract: A display apparatus includes a plurality of pixels, each of the pixels including an organic light emitting diode, a first transistor providing a driving current to operate the organic light emitting diode, a second transistor including a gate electrode that receives a first scan signal, a first electrode that receives a data signal, and a second electrode electrically connected to the first electrode of the first transistor, a storage capacitor including a first electrode receiving a first power voltage and a second electrode electrically connected to the gate electrode of the first transistor, and a color accuracy enhancement transistor that applies a first back bias voltage to the first transistor in response to a color accuracy enhancement signal.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: September 7, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Gun Hee Kim, Do Hyung Kim, Hyeonsik Kim, Sangho Park, Joo-Sun Yoon, Joohee Jeon
  • Patent number: 11114035
    Abstract: A pixel circuit and a display device. The pixel circuit includes a charging unit, a light-emitting unit and an error compensation unit; a voltage storage terminal of the charging unit is connected to a voltage input terminal of the light-emitting unit; one end of the error compensation unit is connected to the voltage storage terminal of the charging unit, a voltage at the voltage storage terminal of the charging unit is used to determine a magnitude of a current flowing through the light-emitting unit; a control terminal of the error compensation unit is configured to receive a light-emitting control signal which is used to control the light-emitting unit to emit light or stop emitting light, the error compensation unit is configured to lower the voltage at the voltage storage terminal of the charging unit when the light-emitting control signal controls the light-emitting unit to emit light.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: September 7, 2021
    Assignee: KunShan Go-Visionox Opto-Electronics Co., Ltd
    Inventors: Guohua Zhao, Bingwen Jin, Siming Hu, Zhenzhen Han, Hui Zhu
  • Patent number: 11114034
    Abstract: A display device is proposed, the display device including a display panel and a driving circuit, and pixels included in the display panel includes a driving transistor, a light emitting element, a capacitor, and first to sixth switching transistors T1 to T6. T1 senses threshold voltage of the driving transistor, the capacitor stores data voltage and a threshold voltage in both electrodes, T2 applies data voltage to the capacitor, T3 initializes the storage capacitor to reference voltage, and T4 initialize the light emitting element to reference voltage, T5 controls current flow between the driving transistor and the light emitting element, and T6 connects both electrodes of the capacitor. The driving circuit divides one frame into an initialization period, a program period, and a light emission period to drive a pixel, and stops light emission of the light emitting device and make equal voltage across the capacitor, in the initialization period.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: September 7, 2021
    Assignee: LG Display Co., Ltd.
    Inventors: Donggun Lee, Kyujin Kim, Taehun Kim, Seungjin Yoo
  • Patent number: 11114014
    Abstract: A display device includes a display unit including first color subpixels, second color subpixels, and third color subpixels, a scan driver for applying scan signals to scan lines connected to the first color subpixels, the second color subpixels, and the third color subpixels, a switch circuit for selecting first data lines connected to the first color subpixels and the second color subpixels for a first section, and selecting second data lines connected to the third color subpixels for a second section after the first section, and a data driver for applying data signals corresponding to the third color subpixels to the switch circuit for a third section between the first section and the second section, and applying data signals corresponding to the first color subpixels and the second color subpixels to the switch circuit for a fourth section after the second section.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: September 7, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dong-Eup Lee, Ji-Hyun Ka, Ki Myeong Eom
  • Patent number: 11114030
    Abstract: A pixel circuit for a display device provides enhanced performance by performing a partial threshold compensation during programming and performing further compensation independent of programming to achieve a short programming time while ensuring threshold compensation accuracy. The pixel circuit is operated in a relatively shortened duration first combined data programming and threshold compensation phase, and in a relatively prolonged duration second threshold compensation phase for improved compensation accuracy. During the combined programming and threshold compensation phase, a drive transistor is diode connected, and a data voltage is applied to a programming a capacitor that also stores a portion of a threshold voltage of the drive transistor. This permits a short programming time.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: September 7, 2021
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tong Lu
  • Patent number: 11107412
    Abstract: A pixel driving circuit includes a driving sub-circuit, a data writing sub-circuit, a compensation sub-circuit and a light-emitting control sub-circuit. The driving sub-circuit is configured to drive the light-emitting device. The data writing sub-circuit is configured to write a data signal to the driving sub-circuit. The compensation sub-circuit is configured to compensate a voltage of the driving sub-circuit. The compensation sub-circuit includes a first switching transistor whose gate is electrically connected to the scanning signal terminal, first electrode is electrically connected to a first terminal of the driving sub-circuit and second electrode is electrically connected to a second terminal of the driving sub-circuit. The first switching transistor is an indium gallium zinc oxide thin film transistor. The light-emitting control sub-circuit is electrically connected to the driving sub-circuit and configured to turn on a line between a first voltage terminal and a second voltage terminal.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: August 31, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yipeng Chen, Libin Liu
  • Patent number: 11107399
    Abstract: A display device includes power lines, first driving transistors on a first side of each of the power lines, second driving transistors on a second side of each of the power lines, light-emitting elements of a first color, a second color and a third color. A first driving transistor of a first power line drives a light-emitting element of the first color. A second driving transistor of the first power line drives a light-emitting element of the second color. A first driving transistor of a second power line drives a light-emitting element of the third color. A second driving transistor of the second power line drives a light-emitting element of the second color. A first driving transistor of a third power line drives a light-emitting element of the first color. A second driving transistor of the third power line drives a light-emitting element of the third color.
    Type: Grant
    Filed: July 26, 2019
    Date of Patent: August 31, 2021
    Assignees: WUHAN TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA JAPAN, LTD.
    Inventors: Jiro Yanase, Yojiro Matsueda, Yoshihiro Nonaka
  • Patent number: 11107424
    Abstract: Aspects of the subject technology relate to control circuitry for light-emitting diodes (LEDs). The control circuitry may include an LED timing controller integrated circuit configured to operate groups of rows of the LEDs with a common randomized row order that mitigates acoustic noise. The LEDs may be implemented in a backlight of a liquid crystal display and the common randomized row order that mitigates acoustic noise may be generated and/or executed to synchronize the LED operation with the operation of the pixels of the liquid crystal display.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: August 31, 2021
    Assignee: Apple Inc.
    Inventors: Vehbi Calayir, James E. Brown
  • Patent number: 11099442
    Abstract: A display device includes: a signal supply portion; a substrate having an extended outer shape portion, the substrate including a first region and a second region that has the extended outer shape portion; a first pixel wire connected to a first pixel in the first region in a display region and the signal supply portion; a second pixel wire connected to a second pixel in the second region in the display region; a relay wire disposed in the first region in the display region; a signal-supply-portion-side lead wire connected to the signal supply portion and an end portion of the relay wire, the end portion being at the signal supply portion side; and an opposite-side lead wire connected to end portions of the relay wire and the second pixel wire, the end portions being at an opposite side to the signal supply portion side.
    Type: Grant
    Filed: June 26, 2020
    Date of Patent: August 24, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masahiro Yoshida, Masakatsu Tominaga
  • Patent number: 11101330
    Abstract: Disclosed is an electroluminescent display device comprising a substrate, a circuit device layer including a signal line on the substrate, a bank defining a first emission area and a second emission area on the circuit device layer, and a first emission layer in the first emission area, and a second emission layer in the second emission area, wherein the first emission area is overlapped with the signal line, and a width of the first emission area is the same as or less than a width of the signal line.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: August 24, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: EunJi Park, Sungman Han, Kihyung Lee
  • Patent number: 11100833
    Abstract: The disclosure provides a display device including a stretchable display panel that includes multiple rows and columns of conventional pixels and a controller, a row of compensation pixels are between at least two adjacent rows of conventional pixels, and a column of compensation pixels are between at least two adjacent columns of conventional pixels. The controller is configured to: drive the compensation pixels between two adjacent columns of conventional pixels to emit light, when the stretchable display panel in a display state is stretched in a row direction; drive the compensation pixels between two adjacent rows of conventional pixels to emit light, when the stretchable display panel in the display state is stretched in a column direction; and control the compensation pixels not to emit light when the stretchable display panel is not stretched. The disclosure further provides a driving method of a display device.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: August 24, 2021
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Yingsong Xu
  • Patent number: 11100846
    Abstract: The present application discloses display-driving circuit for multiple rows of pixels in a column of a display panel. The display-driving circuit includes a compensation sub-circuit comprising a driving transistor, a data-input transistor, a drive-control transistor, a reset transistor, and a capacitor. The compensation sub-circuit is configured to compensate a drift of a threshold voltage of the driving transistor to drive light emission of multiple light-emitting diodes associated with respective multiple rows of pixels in the column.
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: August 24, 2021
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Minghua Xuan, Li Xiao, Lei Wang, Xiaochuan Chen, Detao Zhao, Dongni Liu, Liang Chen
  • Patent number: 11094774
    Abstract: A display device may include a first substrate, a pixel, a contact electrode, and a side electrode. The pixel may overlap a first face of the first substrate. The contact electrode may be electrically connected to the pixel. A first face of the contact electrode may overlap the first face of the first substrate. The side electrode may be positioned beyond the first substrate. A first face of the side electrode may directly contact a second face of the contact electrode. The second face of the contact electrode may be not parallel to the first face of the contact electrode.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: August 17, 2021
    Inventors: Hyuneok Shin, Byoungyong Kim, Jang-Hyun Kim, Sangwoo Sohn, Sangwon Shin, Sukyoung Yang, Dongmin Lee
  • Patent number: 11094621
    Abstract: A display panel includes a substrate having an active zone, a pad zone, an external component zone, and a fan-out zone, a plurality of light-emitting elements disposed in the active zone, and a plurality of wire structures. The wire structures include a first wire structure and a second wire structure. The first wire structure includes a plurality of first inner connecting ends, a plurality of first outer connecting ends, and a first body. The second wire structure includes a plurality of second inner connecting ends, a plurality of second outer connecting ends, and a second body. The first wire structure has a first current A1, the second wire structure has a second current A2, and A1>A2. A number of the first inner connecting ends of the first wire structure is N1, a number of the second inner connecting ends of the second wire structure is N2, and N1>N2.
    Type: Grant
    Filed: October 4, 2019
    Date of Patent: August 17, 2021
    Assignee: Au Optronics Corporation
    Inventor: Peng-Bo Xi
  • Patent number: 11094252
    Abstract: The present application discloses a display-driving method and a display apparatus. The method includes performing an internal compensation to a driving transistor within a display-driving circuit for light-emission in a display-driving time per scan cycle and additionally performing an external compensation via an external-control-sub-circuit in a blanking time between two scan cycles. The method includes using the compensation-control sub-circuit to input a reference voltage to make a driving transistor in conduction state in s start period of the blanking time and increase a voltage level on a sense line associated with the display-driving circuit in an external-compensation period. The method further includes reading the voltage on the sense line at an end of the external-compensation period as a compensation voltage. Furthermore, the method includes using the external-control sub-circuit to correct a data voltage to be supplied to a data line based on the compensation voltage.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: August 17, 2021
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Yicheng Lin, Yu Wang
  • Patent number: 11094241
    Abstract: A display driver (100) includes terminals (TSEG1 and TSEG2) and a drive circuit (130). The terminal (TSEG1) can be connected to a segment electrode (ESEG1). The terminal (TSEG2) can be connected to a segment electrode (ESEG2) whose area is larger than the area of the segment electrode (ESEG1). The drive circuit (130) outputs a PWM segment drive signal (SSEG1) to the terminal (ESEG1), and outputs a PWM segment drive signal (SSEG2) to the terminal (TSEG2). When the same effective voltage is applied to the segment electrode (ESEG1) and the segment electrode (ESEG2), the duty ratio of the segment drive signal (SSEG1) is smaller than the duty ratio of the segment drive signal (ESEG2).
    Type: Grant
    Filed: July 2, 2020
    Date of Patent: August 17, 2021
    Inventor: Daishi Kondo
  • Patent number: 11094254
    Abstract: The present invention discloses a current-driven display device employing an internal compensation scheme and capable of displaying a favorable image with no occurrence of a bright point not included in the original display content. A voltage Vg at a gate terminal of a drive transistor M1 is initialized in a pixel circuit 15 of an organic EL display device before a voltage of a data signal line Dj is written to a holding capacitor C1 via the drive transistor M1 in a diode-connected state. At this time, an initialization voltage Vini is supplied to the gate terminal via a first initialization transistor M4 and a threshold compensation transistor M3. In this manner, a path for initializing the gate terminal of the drive transistor M1 is formed by the first initialization transistor M4 and the threshold compensation transistor M3 connected in series to each other, thereby preventing a voltage reduction at the gate terminal due to leakage current in an off-state transistor.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: August 17, 2021
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Tetsuya Ueno
  • Patent number: 11094768
    Abstract: An electroluminescence display includes a plurality of sub-pixels, each of the plurality of sub-pixels including a light emission region, and a first circuit region and a second circuit region disposed on respective sides of the light emission region. Power supply lines are configured to supply a first power to at least one of the second circuit regions of the sub-pixels arranged at odd-numbered row and the first circuit regions of the sub-pixels arranged at an even-numbered row. A sensing line is configured to supply an initialization voltage or a sensing voltage to at least one of the first circuit regions of the sub-pixels arranged at the odd-numbered row and the second circuit regions of the sub-pixels arranged in the even-numbered row.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: August 17, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jongsik Shim, Byeonguk Gang, Seonghwan Hwang
  • Patent number: 11096257
    Abstract: A vehicle lighting device, in particular of a vehicle combined lighting device, including at least two controllable light modules with point light sources with automotive certification, which are connected to a power source and to a control unit. Each light module includes a driver to which point light sources of the light module are connected, wherein the drivers are connected by their data input via a common data-conducting path of the lighting device to a common control unit and are further connected by their electrical terminals to a two-wire common power distribution system from the source of electrical energy, wherein each point light source is connected to the power output of its driver and to a negative pole of the source of electrical energy or to a grounding pole. A light module for a vehicle lighting device, in particular for a vehicle combined lighting device.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: August 17, 2021
    Inventors: Tomas Gloss, Petr Novak, Ludek Mazal
  • Patent number: 11087689
    Abstract: A display includes a plurality of pixels in a non-quadrangular display area and a plurality of first driving circuits and a plurality of second driving circuits in a peripheral area of the display area. Each of the pixels is connected to a first signal line in a first direction and a second signal line in a second direction crossing the first direction. Each of the first driving circuits outputs a first signal to the first signal line of a corresponding one of the pixels. Each of the second driving circuits outputs a second signal to the second signal line of a corresponding one of the pixels. The number of second driving circuits between neighboring first driving circuits is different depending on a position in the peripheral area.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: August 10, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seung-Kyu Lee, Kwang-Min Kim, Byoung Sun Kim
  • Patent number: 11086153
    Abstract: In one embodiment, a display device includes a display area, a peripheral area, scanning lines, signal lines, a first driver in the peripheral area, and a second driver in the peripheral area. The display area has an arc-shaped corner. The first driver includes first and second buffers configured to apply voltage to the scanning lines, a first shift register unit configured to control the first buffer unit, and a second shift register unit configured to control the second buffer unit. At the corner, extension directions of the first buffer unit and the first shift register unit are equal to each other. Extension directions of the second buffer unit and the second shift register unit are different from each other.
    Type: Grant
    Filed: May 20, 2020
    Date of Patent: August 10, 2021
    Assignee: Japan Display Inc.
    Inventors: Gen Koide, Shimpei Noshita, Junichi Kitamura
  • Patent number: 11087695
    Abstract: A display device includes: scan, control, and emission control signal lines, signals transmitted thereby being different from one another; data and driving voltage lines; a first transistor including a first gate electrode and first source and drain; a second transistor including a second gate electrode connected to a first scan line, a second source connected to a first data line, and a second drain connected to the first source; a light-emitting element; a control transistor including a control gate electrode connected to a first control line and between the driving voltage line and the first source or the light-emitting element and the first drain; and an emission control transistor in series between the light-emitting element and the control transistor, the control transistor and the first transistor, or the driving voltage line and the control transistor, and an emission control gate electrode connected to the emission control signal line.
    Type: Grant
    Filed: December 23, 2019
    Date of Patent: August 10, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sung Hwan Kim, Chul Kyu Kang, Hyun-Chol Bang, Soo Hee Oh, Dong Sun Lee
  • Patent number: 11081056
    Abstract: An organic light emitting display device includes a plurality of pixels. A pixel on an ith horizontal line includes a first transistor coupled between a first power source and a first node and having a gate electrode coupled to a second node. An organic light emitting diode is coupled between the first node and a second power source. A second transistor is coupled between the second and third nodes and is turned on when a first scan signal is supplied to an ith first scan line. A third transistor is coupled between the third and first nodes. A first capacitor is coupled between an ith control line and the second node. A second capacitor is coupled between the third node and a data line. The pixels are simultaneously driven during first, second, and third periods of a frame period and sequentially driven during a fourth period of the frame period.
    Type: Grant
    Filed: May 25, 2018
    Date of Patent: August 3, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD
    Inventors: Jun Hyun Park, Young Wan Seo, An Su Lee, Kang Moon Jo, Chong Chul Chai
  • Patent number: 11081516
    Abstract: A display screen, an electronic device and a method for 3D feature recognition are provided. The display screen includes a plurality of display units distributed in an array across a display area of the display screen; a plurality of infrared emitting elements embedded in a first area of the display area of the display screen; and a plurality of photosensitive elements embedded in a second area of the display area of the display screen. The plurality of photosensitive elements can be combined into an image sensor. The plurality of infrared emitting elements is configured to emit infrared light for illuminating a target object in front of the display screen so as to form a plurality of light spots on the target object. The plurality of photosensitive elements is configured to receive target light spots reflected from the target object and convert the target light spots into photo-electrical signals for generating a target image of the target object.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: August 3, 2021
    Assignee: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.
    Inventor: Anping Wu
  • Patent number: 11081046
    Abstract: A display device including a driving chip and a pixel array is provided. The driving chip is configured to provide multiple emission control signals according to a data input. A pixel array is coupled with the driving chip. M pixel circuits of the pixel array are configured to emit light respectively in M periods, and M is a positive integer. In a corresponding period of the M periods, the driving chip determines a first time length which one of the multiple emission control signals has a first voltage level, and one of the M pixel circuits emits light, in the corresponding period, for a light emission time length corresponding to the first time length.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: August 3, 2021
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Peng-Bo Xi, Chen-Chi Lin, Cheng-Nan Yeh
  • Patent number: 11081502
    Abstract: A region containing a high proportion of crystal components and a region containing a high proportion of amorphous components are formed separately in one oxide semiconductor film. The region containing a high proportion of crystal components is formed so as to serve as a channel formation region and the other region is formed so as to contain a high proportion of amorphous components. It is preferable that an oxide semiconductor film in which a region containing a high proportion of crystal components and a region containing a high proportion of amorphous components are mixed in a self-aligned manner be formed. To separately form the regions which differ in crystallinity in the oxide semiconductor film, first, an oxide semiconductor film containing a high proportion of crystal components is formed and then process for performing amorphization on part of the oxide semiconductor film is conducted.
    Type: Grant
    Filed: November 7, 2019
    Date of Patent: August 3, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Shunpei Yamazaki
  • Patent number: 11081045
    Abstract: A display device includes a first switching element including a second electrode and a first gate electrode, a second switching element including a third electrode connected with the first gate electrode, a third switching element including a fifth electrode connected with the second electrode, and sixth electrode, a fourth switching element including a seventh electrode connected with the second electrode, and an eighth electrode, a fifth switching element including a ninth electrode connected with the second electrode, and a tenth electrode, a first light emitting diode connected with the sixth electrode and the eighth electrode, a second light emitting diode connected with the eighth electrode and the sixth electrode, and a switch selectively connecting a common power source line with the sixth electrode or the eighth electrode. The first light emitting diode and the second light emitting diode have different polarities from each other with respect to a same direction.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: August 3, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Hyuk Park, Hyo Jin Lee
  • Patent number: 11075257
    Abstract: Provided is an electroluminescence display comprising a display panel where a plurality of pixels connected to a plurality of data lines and a plurality of gate lines are arranged. Each pixel comprises: a driving TFT that controls the current in a light-emitting element EL in response to a data voltage applied to a gate; and switching TFTs that supply a high-level power supply voltage to the driving TFT in response to a gate-on voltage of an emission signal and control signals applied to the source and drain of the driving TFT.
    Type: Grant
    Filed: June 26, 2018
    Date of Patent: July 27, 2021
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Hyungnyuck Cho, Jungyoup Suk
  • Patent number: 11074853
    Abstract: An organic light emitting diode (OLED) display is disclosed. In one aspect the display includes a display panel having first through fourth pixels and a scan driving unit that outputs a scan signal to the display panel. The display also includes a data driving unit that alternately outputs a first data signal for the first pixels and a second data signal for the second pixels to the display panel, alternately outputs a third data signal for the third pixels and a fourth data signal for the fourth pixels to the display panel, and begins outputting the first and third data signals before one horizontal period begins The display further includes a demultiplexing unit that alternately applies the first and second data signals to the first and second pixels and the third and fourth data signals to the third and fourth pixels.
    Type: Grant
    Filed: March 2, 2018
    Date of Patent: July 27, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jae-Du Roh
  • Patent number: 11074867
    Abstract: A light-emitting device includes a data signal supply circuit, a first switching element including a first end electrically coupled to the data signal supply circuit, and a second end, a first capacitor electrically coupled to the second end of the first switching element and configured to hold an electric charge according to a gradation voltage, a second switching element including a first end electrically coupled to the second end of the first switching element, and a second end, a pixel circuit including a light-emitting element and a transistor, and a data line electrically coupled to the pixel circuit. The first capacitor is disposed to overlap the transistor in plan view.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: July 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Hitoshi Ota
  • Patent number: 11074886
    Abstract: A multiplexing circuit is provided. The multiplexing circuit includes a first multiplexing unit. The first multiplexing unit is configured to receive a signal at a first output end of a source driving circuit of a display and configured to transmit the signal to a pixel of the display. The first multiplexing unit includes a first switching unit configured to control transmitting of the signal to a first sub-pixel of a first pixel of the display. The first switching unit includes a first switch and a second switch. Both the first switch and the second switch are electrically connected between the first output end and the first sub-pixel of the first pixel. The first switch and the second switch are configured to simultaneously turn on or turn on only one to transmit the signal to the first sub-pixel of the first pixel.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: July 27, 2021
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd.
    Inventor: Lihua Zheng
  • Patent number: 11074854
    Abstract: A driving device and an operation method thereof are provided. The driving device drives a plurality of light-emitting control lines of an organic light emitting diode (OLED) display panel. The light-emitting control lines are divided into a plurality of groups. The driving device includes a control circuit and a plurality of logic gates. The control circuit generates a global light-emitting control signal and determines a duty cycle of the global light-emitting control signal. Any one of the logic gates determines whether to transmit the global light-emitting control signal to the light-emitting control lines of a corresponding group among the groups. When the global light-emitting control signal is transmitted to a corresponding light-emitting control line among the light-emitting control lines, a pulse of the global light-emitting control signal may light up a plurality of pixels connected to the corresponding light-emitting control line.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: July 27, 2021
    Assignee: Novatek Microelectronics Corp.
    Inventors: Yu-Tsung Lu, Chang-Hung Chen
  • Patent number: 11069294
    Abstract: An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes a lower substrate including a display area and a non-display area surrounding the display area, wherein a plurality of pixels are formed in the display area. The OLED display also includes an embedded circuit formed in the configured to apply a plurality of signals to the pixels, and an initialization wiring formed in the non-display area and configured to apply an initialization voltage to each of the pixels. The initialization circuit is formed in a layer so as to at least partially overlap with the area of the embedded circuit.
    Type: Grant
    Filed: May 22, 2019
    Date of Patent: July 20, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Chang-Soo Pyon
  • Patent number: 11069298
    Abstract: A driving circuit, a display panel, a driving method and a display device. The driving circuit includes a pixel circuit and a plurality of light emitting devices; the pixel circuit includes: a data control circuit, a light emitting control circuit and a driving transistor, wherein at least two light emitting devices share the same pixel circuit, and thus, the light emitting devices is driven by the pixel circuit to emit light; and due to the effect of the light emitting control circuit, the light emitting devices can be controlled to emit light in a time-sharing manner.
    Type: Grant
    Filed: March 11, 2020
    Date of Patent: July 20, 2021
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Minghua Xuan, Li Xiao
  • Patent number: 11069290
    Abstract: A display substrate, used in a display apparatus, includes a base substrate; a gate line, a data line and a pixel driving circuit on the base substrate, wherein the pixel driving circuit includes a driving transistor; an orthographic projection of the gate line on the base substrate and an orthographic projection of the data line on the base substrate have a first overlapping region, and an orthographic projection of the gate line on the base substrate and an orthographic projection of the control electrode of the driving transistor on the base substrate have a second overlapping region; a width of the gate line in the first overlapping region is less than a first preset width, and a width of the gate line in the second overlapping region is less than the second preset width.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: July 20, 2021
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xinyu Wei, Dan Cao, Yonglin Guo, Yiran Li, Hongmei Fan
  • Patent number: 11062655
    Abstract: The disclosure provides a pixel circuit, a display panel and a driving method thereof. The pixel circuit includes a driving transistor, a threshold storage subcircuit, a threshold storage control subcircuit, a data storage subcircuit, a data writing control subcircuit, an isolation control subcircuit, a light-emitting control subcircuit and a light-emitting diode. The threshold storage control subcircuit is coupled to the threshold storage subcircuit. The threshold storage subcircuit stores the reference voltage input by the threshold storage control subcircuit, and stores a threshold voltage of the driving transistor. The data writing control subcircuit is coupled to the data storage subcircuit. The data storage subcircuit stores the data voltage input by the data writing control subcircuit. The isolation control subcircuit is coupled between the data storage subcircuit and the threshold storage subcircuit. The driving transistor is coupled to the threshold storage subcircuit and the data storage subcircuit.
    Type: Grant
    Filed: April 5, 2019
    Date of Patent: July 13, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Xinshe Yin
  • Patent number: 11062643
    Abstract: A data driver includes a data driving chip, a first data transmitting line, a second data transmitting line, a first shielding line and a second shielding line. The first data transmitting line and the second data transmitting line are configured to transmit a data signal to the data driving chip. The first shielding line is disposed at a first side with respect to the first data transmitting line. A ground voltage is applied to the first shielding line. The second shielding line is disposed at a second side with respect to the second transmitting line. The second side is opposite to the first side. The ground voltage is applied to the second shielding line.
    Type: Grant
    Filed: March 9, 2020
    Date of Patent: July 13, 2021
    Inventors: Kyu-Hun Lim, Dae-Seop Kim, Ki-Deog Song, Jae-Jin Choi
  • Patent number: 11063091
    Abstract: A display panel including a substrate, a plurality of first pixels and a plurality of second pixels is provided. The substrate has a first display region and a second display region. The first pixels are disposed on the first display region. The second pixels are disposed on the second display region. The ratio of the transmittance of the second pixels to the transmittance of the first pixels is 0.33 to 0.66.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: July 13, 2021
    Assignee: Au Optronics Corporation
    Inventors: Ya-Pei Kuo, Peng-Yu Chen, Hong-Shiung Chen, Cheng-Chih Hsieh, Xuan-Chen Ye
  • Patent number: 11056052
    Abstract: A display device including: a plurality of sub-pixels arranged in a matrix, each including an electro-optical element having a structure in which a display functional layer is sandwiched between an upper electrode and a lower electrode; and an auxiliary interconnect contact in a pixel area in which the plurality of sub-pixels are arranged in a matrix and electrically connecting the upper electrode to an auxiliary interconnect, wherein m (m is an integer equal to or larger than two) sub-pixels adjacent to each other along an arrangement direction of the sub-pixels are regarded as one group, and n (n is a natural number smaller than m) auxiliary interconnect contacts are formed for each group.
    Type: Grant
    Filed: February 8, 2019
    Date of Patent: July 6, 2021
    Assignee: SONY CORPORATION
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 11056060
    Abstract: A display device including: pixels coupled to first scan lines, second scan lines, emission control lines, and data lines; a first scan driver configured to supply a first scan signal to each of the first scan lines at a first frequency; a second scan driver configured to supply a second scan signal to each of the second scan lines at a second frequency corresponding to a driving frequency of the pixels; an emission driver configured to supply an emission control signal to each of the emission control lines at the first frequency; a data driver configured to supply a data signal to each of the data lines at the second frequency; and a timing controller configured to control the first scan driver, the second scan driver, the emission driver, and the data driver.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: July 6, 2021
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dong Hwi Kim, Na Young Kim, Yong Jae Kim, Chul Ho Kim, Jin Jeon
  • Patent number: 11056043
    Abstract: A display device includes pixels coupled to first scan lines, second scan lines, emission control lines, and data lines; a first scan driver to supply a scan signal to each of the first scan lines at a first frequency to drive the display device at a first driving frequency, and to supply the scan signal to each of the first scan lines at a second frequency to drive the display device at a second driving frequency lower than the first driving frequency; a second scan driver to supply a scan signal to each of the second scan lines at the first frequency to drive the display device at the first driving frequency, and to supply the scan signal to each of the second scan lines at the second frequency to drive the display device at the second driving frequency; an emission driver to supply an emission control signal to each of the emission control lines at the first frequency; and a data driver to supply a data signal to each of the data lines in response to the scan signal supplied to each of the first scan lines
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: July 6, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyong Hwan Oh, Ji Hyun Ka, Ki Myeong Eom, Hai Jung In, Jin Jeon, Won Kyu Kwak, Hyun Lee, Hwan Soo Jang, Jin Tae Jeong
  • Patent number: 11054708
    Abstract: A liquid crystal display apparatus includes a plurality of sense amplifiers configured to amplify respective potential differences between a plurality of positive-polarity pixel drive voltages read out from a plurality of pixels of a row to be inspected to a plurality of positive-polarity data lines and a plurality of negative-polarity pixel drive voltages read out from a plurality of pixels of a row to be inspected to a plurality of negative-polarity data lines, in which each of the pixels includes a first switch transistor configured to switch whether or not to output a positive-polarity pixel drive voltage before it is applied to a pixel drive electrode to a corresponding positive-polarity data line and a second switch transistor configured to switch whether or not to supply a negative-polarity pixel drive voltage before it is applied to the pixel drive electrode to a corresponding negative-polarity data line.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: July 6, 2021
    Assignee: JVCKENWOOD CORPORATION
    Inventor: Takayuki Iwasa
  • Patent number: 11056056
    Abstract: A pixel unit circuit, a method of driving the same, a pixel circuit and a display device are provided. A pixel unit circuit includes a light-emitting component, a driving transistor, a data writing circuit and a storage capacitor circuit. The data writing circuit is coupled to a data line, a gate line and a gate electrode of the driving transistor, and configured to, under a control of the gate line, enable a connection between the data line and the gate electrode of the driving transistor to be turned on or off. A first end of the storage capacitor circuit is coupled to the gate electrode of the driving transistor, and a second end of the storage capacitor circuit is coupled to a reference voltage input terminal. A second end of the light-emitting component is coupled to a low-level input terminal.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: July 6, 2021
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Minghua Xuan, Xiaochuan Chen, Shengji Yang
  • Patent number: 11056062
    Abstract: Provided are an organic light emitting display device and a driving method thereof. The display device includes data lines, first detection lines, first compensation detection circuits, a display driving chip, a compensation chip and a control chip. Each data line is electrically connected to a corresponding first detection line through at least one first compensation detection circuit. The display driving chip sends a reference data signal to the data lines in a detection stage. The compensation chip acquires signals collected by the first detection lines and sends the signals to the control chip in the detection stage. The control chip determines a data signal compensation parameter according to the received signals, and controls the display driving chip to provide a display data signal to the data lines in a display stage according to the data signal compensation parameter.
    Type: Grant
    Filed: April 3, 2020
    Date of Patent: July 6, 2021
    Assignee: XIAMEN TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Junkai Liu, Yang Yang, Xiangzi Kong, Shuai Yang
  • Patent number: 11049457
    Abstract: A display may include an array of pixels, where each pixel in the array includes an organic light-emitting diode coupled to a drive transistor and other associated thin-film transistors. The array may be grouped into column pairs, where each column pair includes a first pixel column and a second pixel column that is mirrored with respect to the first pixel column. The drive transistors within each column pair may be formed towards the center of that column pair, whereas the data lines associated with that column pair may be formed along the outer peripheral edges of that column pair. Configured in this way, parasitic coupling between the data lines and any sensitive/floating nodes of the drive transistor may be substantially reduced, which mitigates pixel column crosstalk and ensures luminance uniformity across the display.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: June 29, 2021
    Assignee: Apple Inc.
    Inventors: Shinya Ono, Chin-Wei Lin, Chen-Ming Chen, Chun-Chieh Lin, Gihoon Choo, Hassan Edrees, Zino Lee
  • Patent number: 11048116
    Abstract: Disclosed is an invisible display device driving a display by using wavelengths of a region invisible to humans, thereby being capable of containing pieces of information, which humans no need to see but is necessary for a special purpose including socio-economic activities, and pieces of security information, which normal people should not see, and the invisible display device has a plurality of pixels arranged therein so as to emit infrared rays, wherein each of the plurality of pixels comprising: a first infrared sub pixel for emitting a first infrared ray of a first wavelength range; a second infrared sub pixel for emitting a second infrared ray of a second wavelength range different from the first wavelength range; and a third infrared sub pixel for emitting a third infrared ray of a third wavelength range different from the first and second wavelength ranges.
    Type: Grant
    Filed: December 18, 2016
    Date of Patent: June 29, 2021
    Assignee: Kyonggi University Industry & Academia Cooperation Foundation
    Inventor: Sang Hyun Ju