Electroluminescent Patents (Class 345/76)
  • Patent number: 12230207
    Abstract: A pixel of a display device includes a first transistor including a gate connected to a first node, a first terminal, and a second terminal connected to a second node, a first storage capacitor connected between the first node and the second node, a second storage capacitor connected between the first node and the second node, a second transistor including a gate connected to the first node, a first terminal, and a second terminal connected to the first node, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor including a gate receiving an emission signal, a first terminal connected to a line of a first power supply voltage, and a second terminal connected to the first terminal of the first transistor, and a light emitting element including an anode connected to the second node, and a cathode connected to a line of a second power supply voltage.
    Type: Grant
    Filed: October 20, 2023
    Date of Patent: February 18, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang-Myoung Lee, Sanghyun Kang, Subin Park, Joosun Yoon, Minseong Yi, Seonghyun Jin, Joon Huh
  • Patent number: 12230213
    Abstract: A gate driver includes a first scan signal generator configured to output a logic voltage for driving of a scan transistor through a plurality of stages connected in cascade, the scan transistor performing a switching operation to transfer a data voltage to a driving transistor of a pixel, a second scan signal generator configured to output a logic voltage for driving of a sensing transistor through the plurality of stages, the sensing transistor sensing deterioration of a light emitting element of the pixel, a light emission control signal generator configured to output a logic voltage for control of a light emission control transistor of the pixel through the plurality of stages, and an initialization voltage generator driven by logic voltages received from some nodes of the first scan signal generator based on the light emission control signal generator to supply an initialization voltage to the pixel.
    Type: Grant
    Filed: September 20, 2023
    Date of Patent: February 18, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: Se-Hwan Kim, Tae-Keun Lee, Min-Su Kim, Hae-Jun Park, Young-Taek Hong
  • Patent number: 12230193
    Abstract: A light-emitting device is provided. The light-emitting device includes a data input circuit, a driving transistor, a light-emitting component, a storage capacitor, and an electrostatic protection circuit. The driving transistor has a control terminal and a first terminal. The light-emitting component is coupled to the first terminal of the driving transistor. The storage capacitor is coupled between the data input circuit and the control terminal of the driving transistor. The electrostatic protection circuit is coupled to a node between the data input circuit and the storage capacitor. The light-emitting device of the disclosure can reduce electrostatic discharge generated by the storage capacitor to reduce the risk of the light-emitting device being damaged by static electricity.
    Type: Grant
    Filed: July 18, 2023
    Date of Patent: February 18, 2025
    Assignee: Innolux Corporation
    Inventors: Chung-Le Chen, Shuo-Ting Hong, Ting-Yao Chu
  • Patent number: 12230205
    Abstract: A pixel drive circuit, which includes a data input circuit, a reset compensation circuit, a first switch circuit, a second switch circuit, a third switch circuit, an energy storage circuit and a light-emitting control circuit. The data input circuit is in electrical connection with a control end of the light-emitting control circuit via the energy storage circuit. The reset compensation circuit is in electrical connection with an output of the light-emitting control circuit. The first switch circuit is connected between an output of the data input circuit and an output of the reset compensation circuit. The second switch circuit is connected between an input of the light-emitting control circuit and a first power supply. The third switching circuit is connected between the control end and the input of the light-emitting control circuit. The output of the light-emitting control circuit is in electrical connection with a second power supply.
    Type: Grant
    Filed: July 14, 2023
    Date of Patent: February 18, 2025
    Assignee: HKC CORPORATION LIMITED
    Inventors: Xin Yuan, Xiufeng Zhou, Rongrong Li
  • Patent number: 12223884
    Abstract: An LED driving circuit adjusts a PWM driving frequency in light emitting diode driving, and changes a PWM frequency of an LED driving circuit in response to a frequency of a PWM clock signal delivered externally or internally.
    Type: Grant
    Filed: March 31, 2023
    Date of Patent: February 11, 2025
    Assignee: LX SEMICON CO., LTD.
    Inventors: Sang Suk Kim, Jang Su Kim, Ji Hwan Kim, Jong Min Lee, Kyeong Rok Lee
  • Patent number: 12223896
    Abstract: A display device includes a display panel including pixels, and a timing controller which determines a first dimming period and a second dimming period based on a maximum luminance, determines an emission off ratio of the pixels as a first off ratio increasing discretely as the maximum luminance decreases in the first dimming period, and determines the emission off ratio as a second off ratio in the second dimming period.
    Type: Grant
    Filed: February 23, 2023
    Date of Patent: February 11, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Subin Park, Soyoung Kim, Jungkook Park
  • Patent number: 12223877
    Abstract: Provided are a display panel and a display apparatus. The display panel includes M pixel driving circuits and N sub-pixel units, where M<N, and M and N are each a positive integer. The M pixel driving circuits are configured to drive the N sub-pixel units to emit light. According to the technical solutions, the number of pixel driving circuits is reduced, pixels per inch of the display panel are beneficial to improve, and the display resolution is improved. Moreover, the number of pixel driving circuits does not need to be increased while the number of the sub-pixel units is increased, thereby reducing the cost.
    Type: Grant
    Filed: June 22, 2023
    Date of Patent: February 11, 2025
    Assignee: SEEYA OPTRONICS CO., LTD.
    Inventors: Jialing Li, Yongcai Shen, Liyuan Luo, Qi Li
  • Patent number: 12223907
    Abstract: A pixel circuit includes a light-emitting element, a driving circuit, a first light-emission control circuit, a first initialization circuit, an energy storage circuit, a compensation control circuit and a data written-in circuit. A first terminal of the energy storage circuit is electrically connected to a control terminal of the driving circuit, and a second terminal of the energy storage circuit is electrically connected to a first electrode of the light-emitting element. The data written-in circuit writes a data voltage into a first terminal of the driving circuit under control of a written-in control signal. The compensation control circuit controls the control terminal of the driving circuit to be electrically connected to a second terminal of the driving circuit under control of a compensation control signal.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: February 11, 2025
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yao Huang, Ming Hu
  • Patent number: 12225797
    Abstract: A microcavity pixel design and fabrication method for an organic light emitting diode (OLED) array with a high aperture ratio suitable for a light field display. This is achieved by laterally overlapping intermediate electrodes and optical filler layers, reducing the lateral spacing. The OLED layers in the design have a uniform white OLED stack, allowing each layer to be deposited across the OLED array, simplifying fabrication. The optical path length for each subpixel's optical microcavity is optimized through the thickness of the optical filler layers, allowing the white OLED stack to be uniform, reducing fabrication complexities.
    Type: Grant
    Filed: February 13, 2024
    Date of Patent: February 11, 2025
    Assignee: Avalon Holographics Inc.
    Inventors: Jiaqi Cheng, Jordan Peckham
  • Patent number: 12223911
    Abstract: A pixel includes an organic light emitting diode (OLED), a pixel circuit, and first and second transistors. The OLD includes a cathode electrode connected to a second power source. The pixel circuit includes a driving transistor having a gate electrode initialized by a third power source. The driving transistor controls the amount of current flowing from a first power source to the second power source via the OLED. The first transistor is connected between a fourth power source and the second power source and an anode electrode of the OLED. The first transistor is turned on based on a scan signal is supplied to a scan line. The second transistor is connected between a data line and the pixel circuit. The second transistor is turned on when the scan signal is supplied to the ith scan line.
    Type: Grant
    Filed: February 29, 2024
    Date of Patent: February 11, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Tae Jeong, Min Ku Lee, Ji Hyun Ka, Tae Hoon Kwon, Seung Kyu Lee, Seung Ji Cha
  • Patent number: 12223899
    Abstract: Disclosed are a display device and a method for operating pixels of the display device. The display device comprises: a light-emitting element; and a pixel circuit configured to control the light-emitting element, wherein the pixel circuit includes: a capacitor connected to and disposed between a first node and a second node; and a driving transistor including a gate electrode connected to the second node; a first electrode receiving a high-potential driving voltage; and a second electrode connected to a third node, wherein the pixel circuit is configured such that the same voltage is supplied to the first node and the second node during at least a portion of an operation period of the pixel circuit. Thus, occurrence of a reference voltage related short-circuit in the light-emitting element of the pixel circuit is suppressed to prevent occurrence of defective image display in each pixel and to improve reliability thereof.
    Type: Grant
    Filed: June 27, 2023
    Date of Patent: February 11, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: Haksu Kim, Hwanjoo Lee
  • Patent number: 12219836
    Abstract: An array substrate is provided. The array substrate includes a node connecting line in a same layer as a respective one of the plurality of voltage supply lines, connected to a first capacitor electrode through a first via, and connected to a semiconductor material layer through a second via; and an interference preventing block in a same layer as the second capacitor electrode. Along the first direction, a portion of the node connecting line at a position connecting to the semiconductor material layer through the second via is spaced apart from a first adjacent data line by a first arm, and is spaced apart from a second adjacent data line by a second arm. An orthographic projection of a respective one of the plurality of voltage supply lines on the base substrate substantially covers at least 30% of an orthographic projection of the second arm on the base substrate.
    Type: Grant
    Filed: January 9, 2024
    Date of Patent: February 4, 2025
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Maoying Liao, Yang Zhou, Xin Zhang, Huijuan Yang
  • Patent number: 12219845
    Abstract: A display apparatus includes: a substrate having a plurality of first group areas spaced apart from each other; a first pixel electrode and a second pixel electrode in each of the plurality of first group areas; a first intermediate layer on the first pixel electrode; a second intermediate layer on the second pixel electrode; an opposite electrode on the first intermediate layer and the second intermediate layer; and a plurality of first capping layers on the opposite electrode and spaced apart from each other to correspond to the plurality of first group areas.
    Type: Grant
    Filed: December 7, 2021
    Date of Patent: February 4, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sanghoon Kim, Jongsung Park, Sangmin Yi, Sangshin Lee, Seungjin Lee, Eunjoung Jung
  • Patent number: 12217719
    Abstract: The present application provides a pixel driving circuit and a display device. The pixel driving circuit includes a scanning signal line and a data signal line. A pixel driving circuit unit includes at least two cascaded units, wherein the pixel driving circuit unit is configured to change a connection number of cascaded units that are connected to the data signal line and a light emitting diode, to adjust a brightness of the light emitting diode so as to effectively improve gray level of displayed picture and display quality.
    Type: Grant
    Filed: December 31, 2020
    Date of Patent: February 4, 2025
    Assignee: TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Yan Li
  • Patent number: 12217654
    Abstract: An electroluminescence display apparatus includes a first pixel, a second pixel disposed adjacent to the first pixel in a horizontal direction to share a data line to which a first data voltage and a second data voltage are time-divisionally supplied and a reference voltage line to which a reference voltage is supplied, along with the first pixel, a first gate line coupled to the first pixel to transfer a first gate control signal, corresponding to the reference voltage, to the first pixel, a second gate line coupled to the first and second pixels in common to transfer a second gate control signal, corresponding to the first data voltage and the reference voltage in common, to the first and second pixels, and a third gate line coupled to the second pixel to transfer a third gate control signal, corresponding to the second data voltage, to the second pixel.
    Type: Grant
    Filed: July 29, 2021
    Date of Patent: February 4, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: In Su Hwang, Dong Ik Kim
  • Patent number: 12217667
    Abstract: The disclosure provides a display panel, a compensation of brightness method and a displaying device. The display panel comprises an array substrate, a luminescent layer, a plurality of optical film layers and a photoelectric sensor, wherein the luminescent layer is located on one side of the array substrate, the array substrate is used for driving the luminescent layer to emit light, the optical film layers are located on a side, away from the array substrate, of the luminescent layer, light emitted by the luminescent layer forms optical waveguide on the array substrate and/or the optical film layers, and the photoelectric sensor is used for acquiring the optical waveguide to perform compensation of brightness on the light emitted by the luminescent layer according to data of the optical waveguide.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: February 4, 2025
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Xing Fan, Chao Kong, Xiangmin Wen
  • Patent number: 12209745
    Abstract: The present disclosure provides a backlight module and a display device. The backlight module includes a substrate, a light-emitting layer, and a light refracting layer. The light-emitting layer is disposed on the substrate and includes multiple light-emitting units arranged at intervals. The light-emitting unit is configured to emit light. The light-refracting layer includes multiple first medium parts and multiple second medium parts, where the first medium part covers a surface of the light-emitting unit, and the second medium part is arranged between adjacent first medium parts. The first medium part has a first refractive index n1 for light emitted by the light-emitting unit, and the second medium part has a second refractive index n2 for the light emitted by the light-emitting unit, where n1>n2.
    Type: Grant
    Filed: July 6, 2023
    Date of Patent: January 28, 2025
    Assignee: HKC Corporation Limited
    Inventors: Hao Liu, Baohong Kang
  • Patent number: 12211407
    Abstract: Provided is a display panel, including: a storage module configured to store a first mapping relationship table, the first mapping relationship table showing correspondence between luminance accumulation amounts of each light emitting element in the display panel and luminance compensation gain values; an accumulation module configured to accumulate, when the display panel being powered on, luminance data of each light emitting element in real time to obtain a real-time accumulation amount of the luminance data; a main control module configured to search, according to the real-time accumulation amount of the luminance data, a corresponding luminance compensation gain value in the first mapping relationship table; calculate a real-time data signal for lighting each light emitting element according to the luminance compensation gain value and a real-time target luminance value of the light emitting element; light the light emitting element in real time according to the real-time data signal.
    Type: Grant
    Filed: April 29, 2022
    Date of Patent: January 28, 2025
    Assignees: Hefei BOE Joint Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Song Meng, Min He
  • Patent number: 12211440
    Abstract: A starting signal providing module, a starting signal providing method and a splicing display device are provided. The starting signal providing module comprises a detection circuit, a plurality of signal generating circuits and a plurality of enabling circuits. The signal generating circuit is configured to generate and provide a feedback signal to the detecting circuit when a last-stage scan driving signal output terminal of a scan driving circuit in a corresponding display panel outputs a valid scan driving signal. The detection circuit is configured to provide an enabling control signal to enabling circuits corresponding to at least two signal generating circuits according to the feedback signals from at least two signal generating circuits. The enabling circuit is configured to control a starting signal to be supplied to a scan driving circuit included in a corresponding display panel upon receiving the enabling control signal.
    Type: Grant
    Filed: November 12, 2021
    Date of Patent: January 28, 2025
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Hualing Yang, Lina Liu, Wenxiu Zhu
  • Patent number: 12211428
    Abstract: A display panel includes a pixel circuit and a light-emitting element. The pixel circuit includes a data write device, a drive device and a bias adjustment device. The data write device is configured to provide a data signal to the drive device. The bias adjustment device is configured to provide a bias adjustment signal to the drive device. The display panel further includes a drive circuit, the drive circuit is configured to receive a first drive signal and a second drive signal. In a case where the drive device includes a drive transistor being a PMOS transistor, the bias adjustment signal is same as the first drive signal, or, in a case where the drive device includes a drive transistor being an NMOS transistor, and the bias adjustment signal is same as the second drive signal.
    Type: Grant
    Filed: March 22, 2023
    Date of Patent: January 28, 2025
    Assignee: Xiamen Tiannma Micro-Electronics Co., Ltd.
    Inventors: Jieliang Li, Ping An
  • Patent number: 12211431
    Abstract: A display device may include: a first pixel coupled to a first scan line, a first data line, and a first sensing line; a second pixel coupled to the first scan line, a second data line, and a second sensing line; a first sensing channel corresponding to the first pixel and including a first sampling capacitor; and a second sensing channel corresponding to the second pixel and including a second sampling capacitor. During a first period, the first sensing channel may store a first sampling signal in the first sampling capacitor while the first sensing line is coupled to the first sensing channel, and the second sensing channel may store a second sampling signal in the second sampling capacitor while the second sensing line is disconnected from the second sensing channel.
    Type: Grant
    Filed: November 24, 2023
    Date of Patent: January 28, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sung Hwan Kim
  • Patent number: 12211424
    Abstract: A display panel driving circuit includes a scan driving circuit including a scan stage and a timing controller. The scan stage includes a first circuit connected to a first input node of receiving a first clock signal, a second circuit connected to a second input node of receiving a second clock signal, a third circuit connected to a third input node of receiving a carry signal, the first circuit, and the second circuit and connected to a first control node and a second control node, a pull-up transistor electrically connected to the first input node and an output node of outputting a scan signal and turned on/off by the first control node, and a pull-down transistor electrically connected to the output node and a low-level voltage line and turned on/off by the second control node.
    Type: Grant
    Filed: January 22, 2024
    Date of Patent: January 28, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Taehoon Kim, Sangan Kwon, Soon-Dong Kim, Geunjeong Park, Changnoh Yoon, Jaekeun Lim
  • Patent number: 12205531
    Abstract: An electronic device comprises a display and a controller. The controller is configured to provide a first frequency refresh rate to the display. The controller is also configured to generate a control signal configured to control emission of a light emitting diode of a display pixel of the display at a second frequency based on whether the first frequency refresh rate of the display is less than a predetermined threshold value.
    Type: Grant
    Filed: April 25, 2023
    Date of Patent: January 21, 2025
    Assignee: Apple Inc.
    Inventors: Chin-Wei Lin, Hung Sheng Lin, Vasudha Gupta, Shinya Ono, Tsung-Ting Tsai, Shyuan Yang
  • Patent number: 12205521
    Abstract: The invention relates to various aspects of a ?-LED or a ?-LED array for augmented reality or lighting applications, in particular in the automotive field. The ?-LED is characterized by particularly small dimensions in the range of a few ?m.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: January 21, 2025
    Assignee: OSRAM OPTO SEMICONDUCTORS GMBH
    Inventors: Jens Richter, Kilian Regau, Patrick Hoerner
  • Patent number: 12198628
    Abstract: A light emitting display device includes: a light emitting element including an anode connected to a first line; a first transistor; a second transistor including a first electrode connected to a data line, and a second electrode connected to a gate electrode of the first transistor; a third transistor including a first electrode connected to the first line, and a second electrode connected to a first electrode of the first transistor; a fourth transistor including a second electrode connected to the gate electrode; a sixth transistor including a first electrode connected to a second electrode of the first transistor, and a second electrode connected to a second line; a first capacitor including a first electrode connected to the gate electrode and a second electrode connected to the second electrode of the first transistor; and a second capacitor including a second electrode connected to the second electrode of the first transistor.
    Type: Grant
    Filed: July 27, 2023
    Date of Patent: January 14, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kyung Hoon Chung, Byung Chang Yu
  • Patent number: 12198641
    Abstract: An electronic device is provided. The electronic device includes an optical lens, a display module configured to display a screen through the optical lens, a sensor module configured to measure a temperature of the display module at one or more positions, and memory, and at least one processor. The instructions that, when executed by the at least one processor, cause the electronic device to control the display module to display a designated screen, obtain at least one temperature respectively corresponding to the one or more positions from the sensor module while displaying the designated screen, and based on the obtained at least one temperature, change a luminance of at least a part of the designated screen or change a display area of the display module based on the obtained at least one temperature.
    Type: Grant
    Filed: November 22, 2023
    Date of Patent: January 14, 2025
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seungjoo Lee, Dongil Son, Seungnyun Kim, Jongmin Yoon, Gisoo Lim, Kyusik Choi
  • Patent number: 12198631
    Abstract: Disclosed is a pixel circuit. The pixel circuit includes: a driving element connected to a first node, a second node, and a third node; a first switch element configured to be turned on to supply a data voltage to a fourth node; a second switch element configured to be turned on to supply a reference voltage or an initialization voltage to the fourth node; a third switch element configured to be turned on to connect the first node to the second node; a fourth switch element configured to be turned on to supply the reference voltage to the third node; a fifth switch element configured to be turned on a fourth gate signal to supply a pixel driving voltage to the first node; and a sixth switch element configured to be turned on to connect the third node to a fifth node.
    Type: Grant
    Filed: September 27, 2023
    Date of Patent: January 14, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: Yong Won Lee, Ji Soo Yeom
  • Patent number: 12198625
    Abstract: The present inventive concept provides a display device including a pixel unit which includes pixels, a sensing unit connected to the pixels through sensing lines, a first power voltage generator connected to the pixels through a first power line and generating a first power voltage for driving the pixels, a second power voltage generator connected to the pixels through the first power line and generating a second power voltage for sensing the pixels, and a timing controller selectively controlling operations of the first power voltage generator and the second power voltage generator according to a driving method of the pixel unit, and a method driving the same.
    Type: Grant
    Filed: April 21, 2023
    Date of Patent: January 14, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sang Hyun Lee, Dae Sik Lee, Keun Oh Kang, Si Duk Sung, Song Yi Han
  • Patent number: 12197674
    Abstract: A touch detection drive circuit in an electronic device inputs a touch excitation signal to a touch electrode, and receives a detection signal of the touch electrode. An isolation power supply circuit receives the touch excitation signal and a primary power supply voltage; based on the touch excitation signal in a non-touch detection phase, short-circuits a first reference ground and a second reference ground, stores the primary power supply voltage, and transmits the primary power supply voltage to the touch detection drive circuit; and in a touch detection phase, disconnects the first reference ground from the second reference ground and discharges to the touch detection drive circuit.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: January 14, 2025
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Zhengyuan Hu, Fengxin Wang, Jiacong Zhang
  • Patent number: 12198634
    Abstract: The present disclosure provides a display substrate and a display device. The display substrate includes a driving circuit, a light-emitting element, a first light-emitting control circuit, a first control circuit, a second control circuit, a third control circuit, a data writing-in circuit and an energy storage circuit. The first control circuit is configured to control to connect the first voltage line and a first end of the light-emitting element under the control of the first control signal; the second control circuit is configured to control to connect the reference voltage line and the second end of the light-emitting element under the control of a second control signal; the third control circuit is configured to control to connect the first end of the energy storage circuit and the control end of the driving circuit under the control of a third control signal.
    Type: Grant
    Filed: September 29, 2021
    Date of Patent: January 14, 2025
    Assignees: CHONGQING BOE DISPLAY TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Teng Chen, Dawei Shi, Wentao Wang, Tianlong Zhao, Liang Zhou, Shuaizhuo Liu, Chuanyong Li
  • Patent number: 12198621
    Abstract: The present disclosure provides a pixel circuit, a driving method and a display device. The pixel circuit includes a first reset circuit and a driving circuit, the first reset circuit is respectively electrically connected to a first light emitting control line, a reset control line, a first reset voltage line and a first end of the driving circuit, and is configured to write a first reset voltage provided by the first reset voltage line into the first end of driving circuit under the control of a first light emitting control signal provided by the first light emitting control line and a reset control signal provided by the reset control line; the driving circuit is configured to connect the first end of the driving circuit and a second end of the driving circuit under the control of a potential of a control end of the driving circuit.
    Type: Grant
    Filed: June 23, 2021
    Date of Patent: January 14, 2025
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Yao Huang, Tianyi Cheng
  • Patent number: 12198632
    Abstract: A display device includes a pixel circuit configured to generate a driving current based on a data signal supplied to a data line, a first light-emitting stage configured to emit light based on the driving current, and including first light-emitting elements connected in parallel, a detector configured to detect voltages of respective ends of the first light-emitting stage, and a current compensator configured to compensate for a current flowing through the first light-emitting stage based on a first voltage difference between the voltages of the respective ends of the first light-emitting stage.
    Type: Grant
    Filed: November 14, 2023
    Date of Patent: January 14, 2025
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin Won Jang, Seung Won Kuk, Myung Chul Kim
  • Patent number: 12190806
    Abstract: A display panel including a pixel circuit and a light-emitting element, the pixel circuit including a driving transistor, a data writing transistor, a threshold compensation transistor, a first reset transistor, a bias transistor, and a light-emitting control module, the data writing transistor being electrically connected to a first terminal of the driving transistor, the threshold compensation transistor being connected in series between a gate of the driving transistor and a second terminal of the driving transistor, and configured to detect and self-compensate a threshold voltage deviation of the driving transistor, the first reset transistor and the bias transistor being electrically connected to the second terminal of the driving transistor, the light-emitting control module being connected in series with the driving transistor and the light-emitting element to control whether a driving current flows through the light-emitting element, the data writing transistor and the first reset transistor having th
    Type: Grant
    Filed: December 16, 2022
    Date of Patent: January 7, 2025
    Assignee: Xiamen Tianma Display Technology Co., Ltd.
    Inventors: Shui He, Shanshan Zheng, Jinjin Yang, Jiansheng Zhong, Qiaoling Zhong
  • Patent number: 12190784
    Abstract: A display device including a display panel and a display driving circuit to control the display panel are provided. The display driving circuit includes a light emitting control driver to input a light emitting signal for controlling the brightness of the display panel into the display panel. When a light emitting control signal including a plurality of pulses is input into the light emitting control driver to control the light emitting signal, and when the operating frequency of the light emitting control signal is changed, pulse widths corresponding to at least two pulses of pulses included in the light emitting control signal may be adjusted to differ from each other in a frame after the target time point to change the operating frequency.
    Type: Grant
    Filed: November 8, 2022
    Date of Patent: January 7, 2025
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Juseok Lee, Minwoo Lee, Seoyoung Lee
  • Patent number: 12190822
    Abstract: An array substrate is provided. The array substrate includes K number of columns of first pads. A respective first pad is connected to an anode of a light emitting element, a second electrode of a fifth transistor, and a second electrode of a sixth transistor. The K number of columns of first pads include a plurality of first-first pads in (2k-1)-th columns of the K columns and a plurality of second-first pads in (2k)-th columns of the K columns. A respective first-first pad and a respective second-first pad have different average line widths.
    Type: Grant
    Filed: September 30, 2022
    Date of Patent: January 7, 2025
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Mengqi Wang, Tiaomei Zhang, Zhengkun Li, Quanyong Gu
  • Patent number: 12189238
    Abstract: A backlight unit includes a substrate comprising a first area having light source blocks and a second area having light source blocks, and a light source driver disposed on at least one side of the substrate and electrically connected to the light source blocks of each of the first and second areas through each of first and second sensing lines. The first sensing lines electrically connected to the light source blocks of the first area have a first resistance value, and the second sensing lines electrically connected to the light source blocks of the second area have a second resistance value.
    Type: Grant
    Filed: April 7, 2020
    Date of Patent: January 7, 2025
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dae Sik Lee, Sung Chul Hong, Jun Pyo Lee, Ji Eun Lee, Song Yi Han
  • Patent number: 12190829
    Abstract: An organic light emitting diode display device includes: a timing controlling unit generating an image data, a data control signal and a gate control signal; a data driving unit generating a data voltage using the image data and the data control signal and including an output channel outputting one of the data voltage and a pre-charge voltage; a gate driving unit generating a gate1 voltage, a gate2 voltage, a gate3 voltage, an emission1 voltage and an emission2 voltage using the gate control signal; a display panel including a subpixel, a gate line, a data line and a reset line, the subpixel including first to seventh transistors, a storage capacitor and a light emitting diode; and a selecting unit connecting the output channel to one of the data line and the reset line.
    Type: Grant
    Filed: December 6, 2022
    Date of Patent: January 7, 2025
    Assignee: LG Display Co., Ltd.
    Inventors: Joon-Ki Kim, Ji-Eun Lee
  • Patent number: 12190812
    Abstract: A display device that has high display quality is provided. A highly reliable display device is provided. A display device with low power consumption is provided. A light-emitting element is electrically connected to one of a source and a drain of a first transistor. The other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of a second transistor. A gate electrode of the second transistor is electrically connected to one of a source and a drain of a third transistor. A semiconductor layer of the second transistor and a semiconductor layer of the third transistor each include indium, zinc and a third metal. The ratio of the number of indium atoms to the total number of the indium atoms, zinc atoms, and atoms of the third metal in the semiconductor layer of the second transistor is higher than or equal to 30 atomic % and lower than or equal to 100 atomic %.
    Type: Grant
    Filed: April 11, 2022
    Date of Patent: January 7, 2025
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Kenichi Okazaki, Koji Kusunoki
  • Patent number: 12190820
    Abstract: The present disclosure provides a pixel circuit, a pixel driving method and a display device. The pixel circuit includes a first initialization circuit and a compensation circuit; the first initialization circuit is configured to write a first initial voltage into the driving control node under the control of an initial control signal; the compensation circuit is configured to control the driving control node to be connected to the first node under the control of a compensation control signal. The first initialization circuit or the compensation circuit includes an oxide thin film transistor; or, one of the first initialization circuit and the compensation circuit includes a low temperature polysilicon thin film transistor and an oxide transistor connected in series, and the other of the first initialization circuit and the compensation circuit includes an oxide thin film transistor.
    Type: Grant
    Filed: April 26, 2021
    Date of Patent: January 7, 2025
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Benlian Wang, Yao Huang, Weiyun Huang, Ming Hu
  • Patent number: 12183268
    Abstract: A display device can include a light emitting element and a pixel circuit including a driving transistor; a first capacitor connected between the driving transistor and a first node; a first transistor connected between the first capacitor and a data line to operate based on a first scan signal; a first light emission transistor connected between the first capacitor and a reference voltage line to operate based on a light emission signal; and a second light emission transistor connected between the driving transistor and a low-potential voltage line to operate based on the light emission signal. The first scan signal sequentially includes a dummy scan signal section and driving scan signal section for turning on the first transistor, and the light emission signal includes a coupling period for turning on the first and second light emission transistors between the dummy scan signal section and the driving scan signal section.
    Type: Grant
    Filed: September 14, 2023
    Date of Patent: December 31, 2024
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Taehun Kim, Wookyu Sang, Moonsoo Chung
  • Patent number: 12183265
    Abstract: A display device includes a plurality of light-emitting elements, and a control circuit configured to control drive of the light-emitting elements. The control circuit divides one frame period into a plurality of subframe periods having different lengths and controls light emission and non-emission of the light-emitting elements for each of the subframe periods.
    Type: Grant
    Filed: September 1, 2023
    Date of Patent: December 31, 2024
    Assignee: Japan Display Inc.
    Inventors: Kazunari Tomizawa, Kazuhiko Sako, Tsutomu Harada
  • Patent number: 12185614
    Abstract: A display apparatus includes a substrate, a pixel layer including a plurality of display devices on the substrate, an encapsulating member encapsulating the pixel layer, a light modulating layer on the encapsulating member, a functional layer on the light modulating layer, and a bonding layer located between the light modulating layer and the functional layer and to bond the light modulating layer and the functional layer, where the light modulating layer has openings corresponding to the plurality of display devices, and where the bonding layer fills the openings and has a refractive index that is greater than a refractive index of the light modulating layer.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: December 31, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Changmok Kim, Kwanhee Lee, Jiwon Jung, Youngseo Choi
  • Patent number: 12185585
    Abstract: An active matrix display is disclosed that includes a plurality of pixel circuits. Each of the pixel circuits includes a light-emitting element, at least two transistors, and a storage capacitor. An additional transistor is provided, which is configured for discharging of the storage capacitor. An active matrix display is also disclosed, having at least two drive circuits, wherein at least one of the pixel circuits is driven by a data driver of a first drive circuit is residing physically within a second drive circuit, or vice versa. Further, an active matrix is disclosed, wherein the timing of scan signals and updating of data signals is programmed in relation to the operation of a camera recording an image that is displayed on the active matrix display.
    Type: Grant
    Filed: August 11, 2023
    Date of Patent: December 31, 2024
    Assignee: STEREYO BV
    Inventors: Robbie Thielemans, Vince Dundee
  • Patent number: 12183282
    Abstract: A pixel driving circuit, a method for driving a display panel, and a display device are provided. The display panel includes pixel columns, each of the pixel columns includes pixel components. The pixel driving circuit includes pixel driving modules, a data line, first gating units, and second gating units. Each of the pixel driving modules is coupled to pixel components of adjacent two pixel columns of the pixel columns, any pixel component in each of the pixel columns is written in a driving voltage via a corresponding driving switch. A terminal of each of the first gating units and a terminal of each of the second gating units are respectively coupled to the data line, another terminal of each of the first gating units is coupled to a corresponding adjacent pixel component, another terminal of each of the second gating units is coupled to another corresponding adjacent pixel component.
    Type: Grant
    Filed: December 29, 2022
    Date of Patent: December 31, 2024
    Assignee: HKC CORPORATION LIMITED
    Inventors: Xiufeng Zhou, Xin Yuan, Haijiang Yuan
  • Patent number: 12178103
    Abstract: A display device includes a pixel including light-emitting elements in which light emission luminance during a predetermined period is controlled by controlling a lighting period among the predetermined period, and light-emitting elements in which light emission luminance is controlled by controlling a current value.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: December 24, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masafumi Ueno, Masayuki Takahashi
  • Patent number: 12178094
    Abstract: In a display device, a first power supply voltage line includes a first trunk wiring line, a plurality of branch wiring lines, and a second power supply voltage line includes a second trunk wiring line. The first trunk wiring line includes a first portion and a second portion. A line width of the first portion is smaller than a line width of the second portion. A frame region in a frame region provided with the first portion includes a first irregular frame edge having an irregular shape.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: December 24, 2024
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Junichi Yamada, Naoki Ueda, Fumiyuki Kobayashi
  • Patent number: 12175944
    Abstract: A display apparatus includes a display panel, a compensator, a controller, and a data driver. The compensator determines a degradation grayscale of a compensation region of the display panel. The degradation grayscale may be determined based on a driving time of at least one pixel in the compensation region and degradation data corresponding to the at least one pixel. The controller generates compensated image data for input image data based on the degradation grayscale. The data driver provides a data voltage to the at least one pixel based on the compensated image data.
    Type: Grant
    Filed: December 22, 2022
    Date of Patent: December 24, 2024
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seokgyu Ban, Wook Lee, Jaehoon Shin
  • Patent number: 12175923
    Abstract: A display device including a scan line extending in a first direction, a sensing scan line extending in the first direction and spaced from the scan line, a data line extending in a second direction crossing the first direction, a sensing line extending in the second direction and spaced from the data line, a sensing enable signal line extending in the second direction and spaced from the data line and the sensing line, and a sub-pixel connected to the scan line, the sensing scan line, the data line, the sensing line, and the sensing enable signal line. The sub-pixel includes a plurality of light emitting elements between a first node and a second node, a first transistor configured to supply a driving current to the first node according to a voltage of a gate electrode, and a second transistor to control a connection between the first and second nodes.
    Type: Grant
    Filed: May 2, 2023
    Date of Patent: December 24, 2024
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young Soo Hwang, Hyung Jin Kim
  • Patent number: 12175934
    Abstract: An electro-optical device includes a scanning line, a data line intersecting with each other, a pixel circuit which is provided corresponding to the intersection thereof, and a wire. The pixel circuit includes a light emitting element, one transistor which controls a current flowing to the light emitting element, and the other transistor of which conduction state is controlled according to a scanning signal which is supplied to the scanning line between a gate node of the one transistor and the data line. The wire is provided between the data line and the one transistor.
    Type: Grant
    Filed: October 17, 2023
    Date of Patent: December 24, 2024
    Assignee: SEIKO EPSON CORPORATION
    Inventor: Shin Fujita
  • Patent number: 12175938
    Abstract: The present disclosure provides a pixel circuit. The pixel circuit includes a light emitting element, an energy storage circuit, a driving circuit, a data writing-in circuit, a compensation control circuit, an initialization circuit and a light emitting control circuit. The compensation control circuit is configured to control to connect the control terminal of the driving circuit and the first terminal of the driving circuit under the control of a first control signal. The driving circuit is configured to generate a driving current for driving the light emitting element to emit light under the control of a potential of the control terminal of the driving circuit.
    Type: Grant
    Filed: November 11, 2021
    Date of Patent: December 24, 2024
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Xuewei Tian, Bo Yang, Shuai Xie