Having Compensating Pulse Patents (Class 345/78)
  • Patent number: 11804181
    Abstract: A display device includes: a display panel including a plurality of data lines, a plurality of gate lines, and a plurality of pixels connected to the plurality of data lines and the plurality of gate lines; a data driving circuit configured to supply data signals to the plurality of data lines; a gate driving circuit configured to supply gate signals to the plurality of gate lines; and a power supply circuit configured to supply a first body voltage and a second body voltage having a voltage level that is less than the first body voltage to the plurality of pixels, the plurality of pixels being selectively supplied with the first body voltage and the second body voltage.
    Type: Grant
    Filed: September 23, 2022
    Date of Patent: October 31, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Youngsung Cho, Byeong-Seong So
  • Patent number: 11763733
    Abstract: A display device, a sub-pixel repair circuit and a repair method therefor. The sub-pixel repair circuit comprises a drive circuit module, a detection circuit module, a repair circuit module, a light-emitting device, and a standby light-emitting device; the drive circuit module is used for providing a drive current to the light-emitting device in response to a data signal of a data line and a scan signal of a scan line; the repair circuit module provides a drive current to the standby light-emitting device in response to a data signal provided by the drive circuit module and a short circuit signal or an open circuit signal provided by the detection circuit module. Thus, fault repair of the light-emitting device is implemented, and the display quality of a display device is improved.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: September 19, 2023
    Assignee: CHONGQING KONKA PHOTOELECTRIC TECHNOLOGY RESEARCH INSTITUTE CO., LTD.
    Inventors: Chaowei Yin, Zhongshan Feng
  • Patent number: 11710452
    Abstract: A pixel circuit, is provided, including: a light-emitting element, a driving circuit, a data writing circuit, an on-off control circuit, a first initialization circuit and an energy storage circuit; the data writing circuit writes a data voltage into a third node under control of a first gate driving signal; the on-off control circuit controls communication between a first node and the third node under the control of the first gate driving signal; the first initialization circuit controls writing an initialization voltage into the first node under the control of the first gate driving signal; and a type of a transistor included in the first initialization circuit is different from a type of a driving transistor included in the driving circuit, and a type of a transistor included in the data writing circuit is different from the type of the driving transistor of the driving circuit.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: July 25, 2023
    Assignees: CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO, LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Yipeng Chen, Ling Shi
  • Patent number: 11688319
    Abstract: A driving method for driving a pixel circuit. The pixel circuit includes a driving transistor, a data-writing transistor, a compensating transistor, a first initializing transistor, a second initializing transistor and a light-emitting element. The compensating transistor is connected between a gate of the driving transistor and a second pole of the driving transistor. The second pole of the driving transistor is connected to an initialization power supply through the first initializing transistor. The data-writing transistor is connected between a data voltage input terminal and a first pole of the driving transistor. The second initializing transistor is connected between a first signal terminal and a first pole of the driving transistor; and the light-emitting element is connected between the second pole of the driving transistor and a second power voltage input terminal.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: June 27, 2023
    Assignee: YUNGU (GU'AN) TECHNOLOGY CO., LTD.
    Inventors: Dongfang Zhao, Yang Shen, Zidong Guo, Haofeng Zhang, Zhe Du, Junfeng Li, Yong Ge
  • Patent number: 11663437
    Abstract: A light emitting apparatus recognition system includes a light emitting apparatus, an image capturing apparatus, a recognition apparatus, and an electromagnetic wave emitting element. The light emitting apparatus includes a light source that blinks on the basis of identification information unique to the light emitting apparatus and an electromagnetic wave receiving element. The image capturing apparatus captures an image of light emitted by the light source of the light emitting apparatus. The recognition apparatus recognizes the light emitting apparatus on the basis of the light appearing in the image captured by the image capturing apparatus. The electromagnetic wave emitting element emits an electromagnetic wave from the image capturing apparatus or a vicinity of the image capturing apparatus. The electromagnetic wave receiving element receives the electromagnetic wave emitted by the electromagnetic wave emitting element.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: May 30, 2023
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Daisuke Matsumoto, Shingo Uchihashi, Atsushi Ito, Kazutoshi Ikeda
  • Patent number: 11665943
    Abstract: A display panel is disclosed that includes a substrate, a first initialization voltage line, and a second initialization voltage line. The substrate includes a display area and a peripheral area. The first initialization voltage line is arranged in the display area and includes a first vertical voltage line and a first horizontal voltage line. The second initialization voltage line includes a second vertical voltage line and a second horizontal voltage line overlapping the first horizontal voltage line in a plan view. Each of the plurality of pixels includes a first sub-pixel configured to emit light of a first color, and a second sub-pixel configured to emit light of a second color. The first initialization voltage line is configured to transmit a first initialization voltage to one electrode of a light-emitting diode of the first sub-pixel. The second initialization voltage line is configured to transmit a second initialization voltage to one electrode of a light-emitting diode of the second sub-pixel.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: May 30, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kiwook Kim, Wonkyu Kwak, Kwangmin Kim, Yangwan Kim
  • Patent number: 11653549
    Abstract: A display device includes a substrate, a first insulating layer disposed on the substrate, a through portion passing through the substrate and the first insulating layer, a display unit disposed on the first insulating layer and including a plurality of pixels surrounding at least a portion of the through portion, and a dummy pixel unit. Each pixel includes a light-emitting element including a pixel electrode and an opposite electrode facing each other, and an emission layer disposed between the pixel electrode and the opposite electrode. The dummy pixel unit includes a plurality of dummy pixels disposed between the through portion and the display unit, and including a metal pattern including a same material as the pixel electrode. The dummy pixels are disposed adjacent to the display unit.
    Type: Grant
    Filed: February 8, 2021
    Date of Patent: May 16, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Junhyun Park, Sunkwang Kim, Kangmoon Jo
  • Patent number: 11626074
    Abstract: A display device includes a display panel including a plurality of pixels each coupled to a write scan line, a compensation scan line, an initialization scan line, a bypass scan line, and a data line; and a scan driver configured to supply i (where i is a natural number) write scan pulses, compensation scan pulses, initialization scan pulses, and bypass scan pulses to the write scan line, the compensation scan line, the initialization scan line, and the bypass scan line, respectively, during a first period corresponding to one frame period, and to supply j (where j is a natural number other than i) write scan pulses to the write scan line during each of frame periods of a second period including a plurality of consecutive frame periods.
    Type: Grant
    Filed: August 26, 2019
    Date of Patent: April 11, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jin Young Roh, Hui Nam, Se Hyuk Park, Hyo Jin Lee
  • Patent number: 11587957
    Abstract: A semiconductor device that is less influenced by variations in characteristics between transistors or variations in a load, and is efficient even for normally-on transistors is provided. The semiconductor device includes at least a transistor, two wirings, three switches, and two capacitors. A first switch controls conduction between a first wiring and each of a first electrode of a first capacitor and a first electrode of a second capacitor. A second electrode of the first capacitor is connected to a gate of the transistor. A second switch controls conduction between the gate and a second wiring. A second electrode of the second capacitor is connected to one of a source and a drain of the transistor. A third switch controls conduction between the one of the source and the drain and each of the first electrode of the first capacitor and the first electrode of the second capacitor.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: February 21, 2023
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Patent number: 11580896
    Abstract: An electroluminescence display apparatus includes a display panel including a first pixel and a second pixel, a first current integrator connected to the first pixel through a first sensing channel to sense a first current from the first pixel to generate a first output voltage, a second current integrator connected to the second pixel through a second sensing channel to sense a second current from the second pixel to generate a second output voltage, and a sampling capacitor connected to an output terminal of the first current integrator at one electrode thereof and connected to an output terminal of the second current integrator at the other electrode thereof, thereby sampling the first output voltage and the second output voltage.
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: February 14, 2023
    Assignee: LG Display Co., Ltd.
    Inventors: Myung Gi Lim, Tae Young Lee, Ji Su Choi
  • Patent number: 11574976
    Abstract: A display device includes a driving transistor on a substrate, a light emitting element disposed on the driving transistor, and a lower electrode disposed between the substrate and the driving transistor. The driving transistor includes an active pattern and a gate electrode. The active pattern includes a first region, a second region, and a channel region between the first region and the second region. The light emitting element is electrically connected to the second region of the active pattern. The lower electrode overlaps the channel region of the active pattern and provides a back bias voltage to the driving transistor.
    Type: Grant
    Filed: September 8, 2021
    Date of Patent: February 7, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Youngjae Jeon, Woogeun Lee, Jong-In Kim, Jin-Won Lee
  • Patent number: 11526060
    Abstract: The present disclosure relates to a display device including a substrate, a gate line on the substrate, a data line crossing the gate line, a pixel connected to the gate line and the data line, and a dummy data line disposed at an edge on the substrate and crossing the gate line, wherein the dummy data line includes openings that is disposed on a portion that is near an overlapping portion with the gate line, and portions of the dummy data line separated by the openings are electrically insulated from each other.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: December 13, 2022
    Inventors: Gwon-Heon Ryu, Yang Gyu Jang, Kook Hyun Choi, Beom Jun Kim, Hyung Gi Jung
  • Patent number: 11508294
    Abstract: The present application provides a pixel circuit, a pixel driving method and a display device. The pixel circuit is to be coupled to a to-be-driven element. The pixel circuit includes a first energy storage circuit, a driving circuit, a light-emitting control circuit, a data writing circuit, and a compensation control circuit. The compensation control circuit is configured to, under control of a third control signal, control conduction between the first node and the first terminal of the driving circuit, and control conduction between the second node and the second terminal of the driving circuit.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: November 22, 2022
    Assignee: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
    Inventors: Jiao Zhao, Seungwoo Han, Haoliang Zheng, Minghua Xuan, Li Xiao, Dongni Liu, Liang Chen, Hao Chen
  • Patent number: 11482171
    Abstract: A display module includes a display panel, a source driving circuit, and a timing control circuit. The display panel includes a plurality of sub-pixels, at least one sense signal line, and at least one reference sense signal line. Each sub-pixel includes a pixel driving circuit including a driving transistor. The source driving circuit includes at least one analog-to-digital conversion sub-circuit. Two input terminals of an analog-to-digital conversion sub-circuit in the at least one analog-to-digital conversion sub-circuit are respectively coupled to at least one sense signal line and one reference sense signal line. The analog-to-digital conversion sub-circuit is configured to receive a sense voltage signal from the sense signal line and a reference voltage signal from the reference sense signal line, to obtain a sensing digital signal in accordance with a voltage difference between the sense voltage signals and the reference voltage signal, and to output the sensing digital signal.
    Type: Grant
    Filed: July 15, 2020
    Date of Patent: October 25, 2022
    Assignee: Beijing BOE Technology Development Co., Ltd.
    Inventors: Yi Chen, Lirong Wang
  • Patent number: 11475855
    Abstract: A backlight module and a display device are provided. The backlight module includes a backlight source and a driving circuit for driving the backlight source. In the driving circuit corresponding to at least one backlight unit of the backlight source, a driving module is connected to a data signal input module and a compensation module through a first node, and is connected to the backlight unit through a second node. The compensation module is configured to pull down a potential of the first node to be less than a potential of the second node during a blank frame phase to make the threshold voltage of the driving module negatively biased.
    Type: Grant
    Filed: May 14, 2020
    Date of Patent: October 18, 2022
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Xingyi Liu
  • Patent number: 11450249
    Abstract: Disclosed are a display device and a compensation method thereof for preventing and compensating for deterioration of pixels using average data of stress for each pixel. The display device includes a display panel comprising a plurality of pixels provided thereon and configured to display an image, a display driver configured to output a driving signal for driving the display panel, a timing controller configured to generate stress data by converting grayscale values included in image data into stress values, to accumulate the stress data for each pixel, to calculate average data for each pixel corresponding to an accumulated number of times, to determine a compensation value by performing lossless and lossy compression and restoration on the average data in a regular region and an irregular region, respectively, and to provide the compensation value to the display driver.
    Type: Grant
    Filed: December 14, 2020
    Date of Patent: September 20, 2022
    Assignee: LG Display Co., Ltd.
    Inventors: Ji-Hee Song, Chul-Kwon Lee, Ho-Chul Lee, Ji-Hwan Kim
  • Patent number: 11435602
    Abstract: Systems and methods for providing an electrical waveform to a pi-cell polarization switch. The electrical waveform may reduce/limit ion accumulation in and/or light leakage associated with the polarization switch. The electrical waveform may include multiple segments, e.g., a first segment may drive the polarization switch to a first polarization state and may be defined by a first portion having a first voltage level and a first polarity and a second portion having the first voltage level and a second polarity opposite the first polarity and a second segment, occurring after the first segment, that may drive the polarization switch to the second polarization state. The second segment may be defined by a second voltage level having the first polarity. An absolute value of the first voltage level may be greater than an absolute value of the second voltage level.
    Type: Grant
    Filed: December 12, 2019
    Date of Patent: September 6, 2022
    Assignee: ZSPACE, INC.
    Inventors: Hsienhui Cheng, Jianhong Huang
  • Patent number: 11386844
    Abstract: A display device includes: a plurality of pixels, where each of the pixels includes a light emitting device and a pixel circuit coupled to the light emitting device; a scan driver which supplies a scan signal to the pixel circuit; a data driver which supplies a data signal to the pixel circuit; a power supply which supplies a voltage to the pixel circuit; a timing controller which controls the scan driver; a first signal generator which provides a first clock signal to the timing controller; and a second signal generator which provides a second clock signal to the timing controller.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: July 12, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jae Hyeon Jeon, Joon Chul Goh, Jin Wook Yang, Ki Hong Song
  • Patent number: 11367392
    Abstract: A method and system determine the characteristics of drive devices and load devices in selected pixels in an array of pixels in a display in which each pixel includes a drive device for supplying current to a load device. The method and system supply current to the load device via the drive device in a selected pixel, the current being a function of a current effective characteristic of at least one of the drive device and the load device; measure the current via a measurement line that is shared by adjacent pixels, and extract the value of a selected effective characteristic of one of the drive and load devices from the effect of the current on another of the drive and load devices. Current may be measured via a read transistor in each pixel.
    Type: Grant
    Filed: June 30, 2020
    Date of Patent: June 21, 2022
    Assignee: Ignis Innovation Inc.
    Inventors: Yaser Azizi, Gholamreza Chaji
  • Patent number: 11322090
    Abstract: The present disclosure relates to display technologies and, in particular, to a pixel driving circuit, a pixel driving method, and a display device. The pixel driving circuit includes first to fifth switching elements, a driving transistor, a first storage capacitor, and a second storage capacitor. The pixel driving circuit can eliminate the influence on the driving current caused by the threshold voltage of the driving transistor, the voltage drop resulting from the wire resistance, and the aging of the electroluminescent element, so as to ensure the consistency of the driving current output by each pixel driving circuit and the uniformity of brightness of each pixel display.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: May 3, 2022
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Yingsong Xu
  • Patent number: 11295662
    Abstract: A display device includes a display panel including a pixel, a voltage line supplying a power voltage to the pixel, and a reference voltage line supplying one of a reference voltage and the power voltage to the pixel; a mode selector configured to output one of a first selection signal and a second selection signal according to an operation mode of the display panel; and a switch configured to provide the reference voltage or the power voltage to the reference voltage line in response to one of the first selection signal and the second selection signal.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: April 5, 2022
    Inventors: Jae-Hyeon Jeon, Yu-Chol Kim, Jihye Kim, Jin-Wook Yang, Donggyu Lee, Jakyoung Jin
  • Patent number: 11295663
    Abstract: A method of adjusting brightness of a display panel includes a database creation step: storing attenuation data and a plurality of first brightness gain factors in a database. The attenuation data is performance attenuation data of a functional device of a display panel, and the first brightness gain factors are provided to display brightness of the display panel. A retrieving step: retrieving the attenuation data and the first brightness gain factors from the database. An adjustment step: adjusting the first brightness gain factors according to the attenuation data to obtain a plurality of second brightness gain factors.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: April 5, 2022
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Limin Wang
  • Patent number: 11276348
    Abstract: What is disclosed are systems and methods for compensating for display OLED degradation. Correction factors k for OLED degradation of each sub-pixel is modelled and tracked based on grey level, temperature, and time, and used to correct image data provided to an OLED display.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: March 15, 2022
    Assignee: Ignis Innovation Inc.
    Inventors: Shuenn-Jiun Tang, Junhu He, Tong Liu, Gabriel Franklin Yano de Sousa
  • Patent number: 11276347
    Abstract: What is disclosed are systems and methods for compensating for display OLED degradation. Correction factors k for OLED degradation of each sub-pixel is modelled and tracked based on grey level, temperature, and time, and used to correct image data provided to an OLED display.
    Type: Grant
    Filed: July 18, 2019
    Date of Patent: March 15, 2022
    Assignee: Ignis Innovation Inc.
    Inventors: Shuenn-Jiun Tang, Junhu He
  • Patent number: 11249599
    Abstract: An ultrasonic sensor and a display device is disclosed where a piezoelectric material disposed in each pixel area of the ultrasonic sensor is formed to have various thicknesses, or an electrode driving the piezoelectric material disposed in each pixel area has various areas, thereby providing the ultrasonic sensor that generates ultrasonic waves in various frequency bands. Accordingly, it can expand the frequency band of the ultrasonic waves generated by the ultrasonic sensor to improve its sensing performance, and obtain information of various frequency bands to provide the ultrasonic sensor capable of both the fingerprint sensing and the proximity sensing.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: February 15, 2022
    Assignee: LG Display Co., Ltd.
    Inventors: TaeHyoung Moon, JaeHyun Kim, SungJin Lee, DeukHo Yeon
  • Patent number: 11211005
    Abstract: A pixel driving circuit includes a control sub-circuit, a charging sub-circuit, a driving sub-circuit and a light-emitting sub-circuit, the control sub-circuit is used to control a first thin film transistor to charge the charging sub-circuit, and the charging sub-circuit is used to provide a voltage to the driving sub-circuit to drive the light-emitting sub-circuit to emit light.
    Type: Grant
    Filed: November 14, 2017
    Date of Patent: December 28, 2021
    Assignees: BOE Technology Group Co., Ltd., Hefei Xinsheng Optoelectronics Technology Co., Ltd.
    Inventors: Zuquan Hu, Xiping Wang
  • Patent number: 11158261
    Abstract: A display device includes: a pixel including: a light emitting element connected between a first power source and a second power source; a first transistor connected between the first power source and the light emitting element to control a driving current, and including a first gate electrode connected to a first node and a second gate electrode connected to a bias control line; and a switching transistor connected between a data line and the first node, and including a gate electrode connected to a scan line; and a driving circuit to drive the pixel according to a driving frequency. The driving circuit drives the pixel in a first mode when the driving frequency is in a first range, and sequentially supplies a control signal having a first voltage and a second voltage to the bias control line during a light emission period of the pixel in the first mode.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: October 26, 2021
    Assignee: Samsung Display Co., Ltd.
    Inventors: Keun Woo Kim, Mee Jae Kang, Hye Na Kwak, Han Bit Kim, Thanh Tien Nguyen, Yong Su Lee, Jae Seob Lee
  • Patent number: 11158253
    Abstract: A display device may include a plurality of pixels configured to display image data on a display. The display device may also include a circuit that measures a first current associated with a light-emitting diode (LED) of a pixel of the plurality of pixels in response to the circuit receiving a first data voltage. The circuit may also measure a second current associated with the LED of the pixel of the plurality of pixels in response to the circuit receiving a second data voltage. The circuit may then determine a voltage associated with the LED based at least in part on the first current and the second current.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: October 26, 2021
    Assignee: Apple Inc.
    Inventors: Injae Hwang, Hung Sheng Lin, Hyunwoo Nho, Sun-Il Chang, Rui Zhang, Mohammad B. Vahid Far, Kingsuk Brahma, Jesse A. Richmond, Hyunsoo Kim, Junhua Tan
  • Patent number: 11094257
    Abstract: The embodiments of the present disclosure disclose a pixel driving circuit, a pixel driving method and a display apparatus. A pixel driving circuit for driving a light emitting element, comprising: a first control sub-circuit providing a data signal terminal signal to a first node based on a first signal control terminal signal; a second control sub-circuit providing a first power source terminal signal to a fourth node based on a third signal control terminal signal, and a signal of the fourth node to a second node based on a second signal control terminal signal; a third control sub-circuit providing a second power source terminal signal to a third node based on a fourth signal control terminal signal; an energy storage sub-circuit storing a potential difference between the first node and the second node; and a driving sub-circuit transmitting a driving current for driving the light-emitting element.
    Type: Grant
    Filed: June 22, 2018
    Date of Patent: August 17, 2021
    Assignees: Hefei Xinsheng Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Qi Hu, Hui Jing, Weijing Liao
  • Patent number: 11024252
    Abstract: A power-saving driving circuit for a display panel is provided. The display panel includes a pixel array including a plurality of data lines. The data lines are grouped into a plurality of pixel regions according to a scan time. Each of the pixel regions has a plurality of pixels. The power-saving driving circuit includes at least one source driver. The source driver respectively supplies a driving voltage to the pixels on at least one of the data lines. The driving voltage supplied by the source driver to each of the pixel regions has a varying driving capability determined according to a pulse width and/or a rising slope of the driving voltage. The pulse width and/or the rising slope of the driving voltage is larger when the driving voltage is supplied for driving the pixels in the pixel region farther from the source driver.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: June 1, 2021
    Assignee: Novatek Microelectronics Corp.
    Inventors: Li-Tang Lin, Keko-Chun Liang
  • Patent number: 10957720
    Abstract: To provide a display device having a small circuit area and low power consumption. The display device includes a semiconductor device and a D/A converter circuit, and the semiconductor device includes first to third transistors and first and second capacitors. A first terminal of the first transistor is electrically connected to a first terminal of the first capacitor. A first terminal of the second transistor is electrically connected to a gate of the third transistor, a second terminal of the first capacitor, and a first terminal of the second capacitor. A first terminal of the third transistor is electrically connected to a second terminal of the second capacitor. An output terminal of the D/A converter circuit is electrically connected to a second terminal of the first transistor and a second terminal of the second transistor.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: March 23, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kei Takahashi, Susumu Kawashima, Koji Kusunoki, Kazunori Watanabe
  • Patent number: 10957254
    Abstract: An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: March 23, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Toya, Takehiko Kubota
  • Patent number: 10827582
    Abstract: The present disclosure provides an electronic device including a light-emitting unit and at least one circuit unit. The light-emitting unit includes at least two diodes coupled in series. At least one of the diodes is a light-emitting diode for generating light. The circuit unit includes a thin-film transistor or switch component coupled to a first end of the light-emitting unit and a power source.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 3, 2020
    Assignee: InnoLux Corporation
    Inventors: Li-Wei Mao, Chin-Lung Ting, Ming-Chun Tseng
  • Patent number: 10804337
    Abstract: Disclosed is an in-cell type organic electroluminescent device. The in-cell type organic electroluminescent device according to an embodiment of the present disclosure includes at least one OLED-driving Thin-Film Transistor (OLED driving TFT) that is formed on a substrate and drives an organic light emitting device (OLED); the OLED connected to the at least one OLED driving TFT through a first contact hole; at least one touch-sensing thin-film transistor (though sensing TFT) that is simultaneously formed with the at least one OLED driving TFT on the substrate and senses touch; and an touch electrode that is connected to the at least one touch sensing TFT through a second contact hole and does not overlap with the OLED, wherein the at least one OLED driving TFT and the at least one touch sensing TFT share a gate line.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 13, 2020
    Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin Jang, Yuanfeng Chen, Jae Gwang Um
  • Patent number: 10720100
    Abstract: An organic light emitting display (OLED) device may include a display panel, a gate driver, a data driver, a timing controller and a deterioration compensation unit. The deterioration compensator may detect one or more deteriorated regions in the display region based on stress data of the respective pixels, the stress data being generated by counting input data corresponding to the respective pixels, and generate compensation data of pixels included in each of the deteriorated regions, based on the stress data of the respective pixels and sensing data for deteriorations of pixels included in two or more horizontal lines which are arbitrarily selected among horizontal lines corresponding to the deteriorated region.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: July 21, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Jeisung Lee, Namseok Choi, Joo-Young An, Jihoon Park, Chulha Park
  • Patent number: 10650744
    Abstract: Disclosed is a method for compensating a pixel driving circuit of an OLED display panel. In the compensation method, a driving transistor is enabled to operate stably in a saturation region for twice, and a threshold voltage of the driving transistor is calculated based on a collected charging voltage and charging time. A pixel driving circuit is compensated by establishing a threshold-voltage compensation table. The compensation method is easy to operate and can significantly improve a detecting speed of a threshold voltage. Moreover, an effect of a voltage-current conversion factor on detecting accuracy of a threshold voltage can be avoided.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: May 12, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yufeng Jin, Hongjun Xie
  • Patent number: 10573665
    Abstract: With an increase in the definition of a display device, the number of pixels is increased, and thus the numbers of gate lines and signal lines are increased. Due to the increase in the numbers of gate lines and signal lines, it is difficult to mount an IC chip having a driver circuit for driving the gate and signal lines by bonding or the like, which causes an increase in manufacturing costs. A pixel portion and a driver circuit for driving the pixel portion are formed over one substrate. At least a part of the driver circuit is formed using an inverted staggered thin film transistor in which an oxide semiconductor is used. The driver circuit as well as the pixel portion is provided over the same substrate, whereby manufacturing costs are reduced.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 25, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Kengo Akimoto, Atsushi Umezaki
  • Patent number: 10540924
    Abstract: The present invention discloses a source driver that drives a source driver. The source driver is configured in such a manner that a source driving module for driving display data and a conversion module for converting a sensing signal of a display panel into sensing data share components thereof. Thus, the area of the source driver can be reduced.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: January 21, 2020
    Assignee: Silicon Works Co., Ltd
    Inventors: Jae Kwan Lee, Jong Keun Hwang
  • Patent number: 10467953
    Abstract: The present disclosure relates to a pixel driving circuit and an organic light-emitting diode (OLED) display having the pixel driving circuit. The pixel driving circuit adopts a 6T2C (six transistors and two capacitors) structure to compensate a threshold voltage of the driving thin film transistor (TFT) in the pixel. As such, a current passing through the OLED may not be related to the threshold voltage of the driving TFT. So as to eliminate the improper image-displaying of the OLED display resulting from the drifting of the threshold voltage of the driving TFT.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: November 5, 2019
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
    Inventors: Bobiao Chang, Xiaolong Chen, Yi-chien Wen, Ming-jong Jou
  • Patent number: 10446076
    Abstract: A display device related to one embodiment of the present invention includes a plurality of pixel circuits each connected to a scanning signal line, initialization control signal line, light emitting control signal line and video signal line, wherein each of the plurality of pixel circuits includes a first transistor connected to the scanning signal line and the video signal line, a second transistor connected to a first node and the first transistor, a third transistor connected to the first node and a scanning signal line, a fourth transistor connected to the second transistor and the light emitting control signal line, and a fifth transistor connected to the second transistor, a power supply voltage line, and the light emitting control signal line.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: October 15, 2019
    Assignee: Japan Display Inc.
    Inventor: Ilin Wu
  • Patent number: 10410581
    Abstract: A display device related to one embodiment of the present invention includes a plurality of pixel circuits each connected to a scanning signal line, initialization control signal line, light emitting control signal line and video signal line, wherein each of the plurality of pixel circuits includes a first transistor connected to the scanning signal line and the video signal line, a second transistor connected to a first node and the first transistor, a third transistor connected to the first node and a scanning signal line, a fourth transistor connected to the second transistor and the light emitting control signal line, and a fifth transistor connected to the second transistor, a power supply voltage line, and the light emitting control signal line.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: September 10, 2019
    Assignee: Japan Display Inc.
    Inventor: Ilin Wu
  • Patent number: 10339358
    Abstract: The disclosure provides a palmprint recognition circuit based on a LTPS technology, a palmprint recognition method and a display screen. The palmprint recognition circuit comprises an optical signal collecting unit, configured to collect an optical signal indicating a palmprint information and convert the collected optical signal into a current signal; a current signal amplifying unit, configured to amplify the converted current signal; and a current signal detecting unit, and configured to detect an intensity of the amplified current signal which indicates a ridge line or a valley line of the palmprint in the palmprint information. Therefore, it can solve the problem of having no palmprint recognition circuit and method for a LTPS-TFT display panel. This can eliminate an influence of a change of parasitic capacitance on the recognition result, wherein the change of parasitic capacitance is caused by a change of a wiring manner in the circuit.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 2, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaoliang Ding, Xue Dong, Haisheng Wang, Xiaochuan Chen, Yingming Liu, Shengji Yang, Lei Wang, Wei Liu, Weijie Zhao, Changfeng Li, Tao Ren
  • Patent number: 10311786
    Abstract: A light emitting display device including: a display panel; a plurality of pixels included in the display panel, each of the plurality of pixels including a driving switching element connected to a first power line and a light emitting element connected to a second power line; a maximum voltage detection unit for detecting a voltage from each of the light emitting elements of each of the pixels and outputting a maximum voltage that has a highest voltage level among the detected voltages; and a power supply unit for correcting a first driving voltage based on the maximum voltage and applying the corrected first driving voltage to the first power line.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: June 4, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Wonsik Oh, Myungho Lee, Geunjeong Park, Myoungseop Song
  • Patent number: 10204551
    Abstract: An OLED driving circuit is disclosed. The OLED driving circuit includes at least two types of pixel driving circuits for driving each pixel of an OLED display panel. The at least two types of the pixel driving circuits have different types and/or amounts of elements so a different pixel driving circuit is designed for each pixel. In comparison with a current display panel using the same driving circuit, a part of the pixel driving circuit is simplified to simplify a structure and to reduce a space occupied by the OLED driving circuit on an effective area of the display panel.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: February 12, 2019
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd
    Inventor: Di Zhang
  • Patent number: 10056038
    Abstract: The present disclosure discloses an organic light emitting display panel, a driving method thereof, and an organic light emitting display apparatus. The organic light emitting display panel includes a plurality of pixel driving circuits, comprising: a driving module including a driving transistor and a first capacitor; an initialization module for initializing potentials of a gate and a first electrode of the driving transistor at least under the control of a first scanning signal terminal; a data writing module for transmitting a signal of a data signal terminal to a second electrode plate of a first capacitor under the control of the first or a second scanning signal terminal; a light emitting control module for transmitting a potential signal of the first electrode of the driving transistor to the second electrode plate of the first capacitor and driving an organic light emitting diode to emit light.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: August 21, 2018
    Assignee: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu Xiang, Yue Li, Tong Wu, Zeyuan Chen, Gang Liu, Dong Qian
  • Patent number: 9966009
    Abstract: A display device in an embodiment according to the present invention includes a pixel region includes a plurality of pixels arranged in a matrix, a first power source line arranged in the pixel region and provided with a first power source voltage supplying a current to the plurality of pixels, a second power source line located in a layer higher than the first power source line in the pixel region and including an intersection part intersecting the first power source line and provided with a second power source voltage different to the first power source voltage, a conducting layer interposed between the first power source line and the second power source line via an insulation layer and having at least one part overlapping the intersection part, a current detection portion electrically connected with the conducting layer.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: May 8, 2018
    Assignee: Japan Display Inc.
    Inventors: Yuuichi Numata, Takahiro Fujioka, Kazuhiro Odaka, Hiroyuki Kimura
  • Patent number: 9928776
    Abstract: An organic light emitting display device includes a display panel including a plurality of pixels, a scan driver configured to provide a scan signal to the pixels via a plurality of scan lines, a data driver configured to provide a data signal to the pixels via a plurality of data lines, and a readout circuit connected to the pixels via a plurality of readout lines, the readout circuit including a current-voltage converter configured to convert a current flowing through one of the readout lines into a first voltage, an analog-digital converter configured to convert the first voltage or a second voltage of the one of the readout lines into a digital data, and a switching circuit configured to control a connection among the one of the readout lines, the current-voltage converter, and the analog-digital converter.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: March 27, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jin-Woo Kim
  • Patent number: 9812218
    Abstract: A pulse is inputted to TFTs 101 and 104 so that the TFTs would turn ON and then potential of a node ? rises. When the potential of the node ? reaches (VDD?VthN), the node ? became in a floating state. Accordingly, a TFT 105 then turns ON, and potential of an output node rises as a clock signal reaches the level H. On the other hand, potential of a gate electrode of the TFT 105 further rises due to an operation of capacitance 107 as the potential of the output node rises, so that the potential of the output node would be higher than (VDD+VthN). Thus, the potential of the output node rises to VDD without voltage drop caused by a threshold of the TFT 105.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: November 7, 2017
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Munehiro Azami, Shou Nagao, Yoshifumi Tanada
  • Patent number: 9773456
    Abstract: A data voltage compensation circuit includes a compensation information provider, a gamma register, and a compensation data voltage provider. The compensation information provider generates a test data voltage based on a test power supply voltage and a test reference voltage, and provides compensation information corresponding to the test data voltage. The gamma register provides a gamma value corresponding to display data. The compensation data voltage provider provides a compensation data voltage based on the gamma value, the compensation information, and a reference voltage. Changes in the reference voltage change a power supply voltage of a display panel.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: September 26, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyun-Suk Kang
  • Patent number: 9678614
    Abstract: The present invention discloses a touch display panel, a detecting method thereof, and a display device. The common electrode layer is divided into a plurality of independent self capacitance electrodes, and the common electrode is multiplexed as self capacitance electrodes. There is no need to provide an additional film, and it is only required to modify the pattern of the common electrode layer in the current LCD panel. Thus, the production cost is reduced, and the production efficiency is improved. Since the self capacitance electrodes are formed by dividing the common electrode layer in the above-mentioned touch display panel, a compensating electrode is further provided which is arranged in a layer different from that of the self capacitance electrodes, is insulated from the self capacitance electrodes, and at least covers a portion of a partition gap between neighboring self capacitance electrodes. A common electrode signal is applied to the compensating electrode during a display period.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: June 13, 2017
    Assignees: Boe Technology Group Co., Ltd., Beijing Boe Optoelectronoic Technology Co., Ltd.
    Inventors: Rui Xu, Lei Wang, Yanchen Li, Xi Chen, Yingming Liu, Shengji Yang, Zhiying Bao, Yue Li, Zhenhua Lv, Weijie Zhao, Hailin Xue