Brightness Or Intensity Control Patents (Class 345/77)
  • Patent number: 11705051
    Abstract: A display device includes a first pixel driver connected to a sweep line, the first pixel driver generating a control current based on a first data voltage, a second pixel driver connected to a scan control line, the second pixel driver generating a driving current based on a second data voltage and controlling a period for which the driving current flows, based on the control current, and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes a first transistor generating the control current based on the first data voltage, a second transistor providing the first data voltage to a first electrode of the first transistor based on a scan write signal, and a first capacitor including a first capacitor electrode connected to a gate electrode of the first transistor, and a second capacitor electrode connected to the sweep line.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: July 18, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung Hwan Hwang, Hyun Joon Kim, Kye Uk Lee, Sang Jin Jeon, Jun Ki Jeong
  • Patent number: 11705055
    Abstract: The present disclosure provides a display device. The display device includes at least one display panel including at least one light-emitting diode (LED) light board, a drive control module connected to the LED light board, and a detecting module respectively connected to the LED light board and the drive control module. The LED light board includes at least one LED. The drive control module is configured to drive the LED of the LED light board to display.
    Type: Grant
    Filed: December 18, 2020
    Date of Patent: July 18, 2023
    Assignee: TCL China Star Optoelectronics Technology Co., Ltd.
    Inventor: Wenfang Li
  • Patent number: 11688331
    Abstract: A display device includes: a first pixel driver to generate a control current; a second pixel driver to generate a driving current, and control a period during which the driving current flows, based on the control current; and a light-emitting element connected to the second pixel driver to receive the driving current. The first pixel driver includes: a first transistor to generate the control current based on a first data voltage; and a second transistor to provide the first data voltage to a first electrode of the first transistor based on a scan write signal from a scan write line. The second pixel driver includes: a third transistor to generate the driving current based on the control current; and a fourth transistor to provide a second data voltage to a first electrode of the third transistor based on a scan write signal from the scan write line.
    Type: Grant
    Filed: June 24, 2022
    Date of Patent: June 27, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jung Hwan Hwang, Hyun Joon Kim, Kye Uk Lee, Sang Jin Jeon, Jun Ki Jeong
  • Patent number: 11670219
    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: March 17, 2021
    Date of Patent: June 6, 2023
    Assignee: Apple Inc.
    Inventors: Chin-Wei Lin, Hung Sheng Lin, Vasudha Gupta, Shinya Ono, Tsung-Ting Tsai, Shyuan Yang
  • Patent number: 11663979
    Abstract: An organic light emitting display device includes pixels, a sensor configured to extract at least one of deviation information of first transistors of the pixels and deterioration information of OLEDs of the pixels in a sensing period, and a converter configured to change a bit of first data input from the outside by using at least one of the deviation information and the deterioration information, and to generate second data, wherein a pixel at an ith horizontal line includes an OLED, a first transistor configured to control an amount of a current that flows from a first power source via the OLED in response to a voltage of a first node, second and third transistors configured to turn on when a scan signal is supplied to an ith scan line, and a fourth transistor configured to turn on when a control signal is supplied to an ith control line.
    Type: Grant
    Filed: October 15, 2021
    Date of Patent: May 30, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai Jung In, Dong Gyu Kim, Bo Yong Chung
  • Patent number: 11663955
    Abstract: A pixel circuit, a drive method, a display substrate, and a display device are provided. The pixel circuit includes a light emitting device, a current supply sub-circuit, and a time control sub-circuit. The current supply sub-circuit is connected to a scanning signal terminal, a data signal terminal, a light emitting control terminal, a first power voltage terminal, the time control sub-circuit, and the light emitting device, and is configured to receive a data voltage of the data signal terminal and provide a drive current for the light emitting device. The time control sub-circuit is connected to the scanning signal terminal, a time length signal terminal, a second power voltage terminal, a direct current control signal terminal, and a direct current voltage terminal, and is configured to receive a time length voltage of the time length signal terminal and a direct current voltage input by the direct current voltage terminal.
    Type: Grant
    Filed: February 7, 2021
    Date of Patent: May 30, 2023
    Assignees: Beijing BOE Display Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Ning Cong, Minghua Xuan, Can Zhang, Ming Yang, Can Wang, Angran Zhang, Hao Chen, Xiaochuan Chen
  • Patent number: 11657768
    Abstract: A display device includes a display panel including a pixel including a light emitting element emitting light and electrically connected to a data line and a sensing line, a timing controller varying a driving frequency of the display panel based on an input frequency of digital video data, and a data driver supplying a data voltage to the data line based on the digital video data during a data addressing period of a frame period and receiving a sensing signal from the sensing line during a sensing period. The data driver electrically connects the sensing line to an initialization voltage line during the data addressing period in case that the digital video data is changed, and electrically connects the sensing line to a high impedance during the data addressing period in case that the digital video data is not changed.
    Type: Grant
    Filed: February 14, 2022
    Date of Patent: May 23, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Soo Yeon Kim, Tae Gon Im, Jong Jae Lee, Jun Pyo Lee
  • Patent number: 11650490
    Abstract: A projection device, comprising a light source device and a control device. The light source device is configured to, according to instructions, emit laser light of first primary color, second primary color, third primary color, and a fourth mixed color fluorescence, respectively. The control device is configured to determine a color gamut range of pixels of an image to be modulated, and transmit the instructions according to the color gamut range to control the light source device to output light required for modulation of the image to be modulated from the laser light of first primary color laser, second primary color, third primary color, and fourth mixed color fluorescence, respectively. The device and method are capable of modulating an image with a wide color gamut, and also save light source energy.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: May 16, 2023
    Assignee: Appotronics Corporation Limited
    Inventors: Fei Hu, Zuqiang Guo, Yi Li
  • Patent number: 11651719
    Abstract: An electronic device may include an electronic display panel having multiple display pixels for displaying an image based on analog voltage signals. The electronic device may also include interpolation circuitry to generate the analog voltage signals based on digital image data corresponding to the image. The interpolation circuitry may also receive analog reference voltages and interpolate between sets of the analog reference voltages to generate intermediate voltages, which may be a part of the analog voltage signals. Interpolating between the sets analog reference voltages may include performing a first level interpolation of a first set of the analog reference voltages to generate a first intermediate voltage and performing a second level interpolation of a second set of the analog reference voltages to generate a second intermediate voltage, wherein the first level interpolation is different from the second level interpolation.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: May 16, 2023
    Assignee: Apple Inc.
    Inventors: John T. Wetherell, Mahdi Farrokh Baroughi, Jaeyoung Kang, Shingo Hatanaka, Hasan Akyol, Hopil Bae
  • Patent number: 11645964
    Abstract: A display device includes a display panel. The display panel includes a pixel including a light emitting element. A compensator calculates a current stress of the light emitting element based on input grayscale values sequentially provided for the pixel during a specific time and generates a first output grayscale value by compensating for a first input grayscale value provided at a current time point based on the current stress. A driver generates a data signal based on the first output grayscale value and supplies the data signal to the pixel. The compensator sets the first output grayscale value to be less than the first input grayscale value in case that the input grayscale values are greater than a reference grayscale value.
    Type: Grant
    Filed: September 21, 2021
    Date of Patent: May 9, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Dae Gwang Jang
  • Patent number: 11645974
    Abstract: A display device includes a pixel unit including pixels, a timing controller configured to generate image data based on input image data, a data driver configured to generate a data signal corresponding to the image data and supply the data signal to the pixels, a power supply configured to supply a power voltage to the pixel unit, and a power controller configured to calculate a load value and a peak grayscale value based on the input image data, and to generate a power control signal to change a voltage level of the power voltage based on the load value and the peak grayscale value.
    Type: Grant
    Filed: May 13, 2022
    Date of Patent: May 9, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Ki Hyun Pyun, Jang Mi Lee, Eun Jin Choi
  • Patent number: 11631366
    Abstract: According to one embodiment, a display device includes pixels, gate lines, source lines, a first driver, and a second driver selecting a gradation voltage corresponding to a gradation value of input image data from either of a plurality of gradation voltages of a first system and gradation voltages of a second system, and supplying the selected gradation voltage to the corresponding source line of the plurality of source lines. In at least a gradation region of all gradation regions of the image data, a value of the corresponding gradation voltage of the second system is relatively different from a value of the corresponding gradation voltage of the first system, for each of same gradation values.
    Type: Grant
    Filed: December 23, 2021
    Date of Patent: April 18, 2023
    Assignee: Japan Display Inc.
    Inventor: Tadafumi Ozaki
  • Patent number: 11630546
    Abstract: A display device, includes: a base substrate; a display element layer on the base substrate, the display element layer including a driving electrode; an insulation layer on the display element layer, the insulation layer defining an active region and a peripheral region adjacent to the active region; an input sensing layer on the insulation layer, the input sensing layer including a sensing electrode that overlaps the active region and a compensation electrode that overlaps the peripheral region, the sensing electrode and the driving electrode forming a parasitic capacitor; and a detection control circuit electrically connected through an output node to the sensing electrode and the compensation electrode, wherein the detection control circuit is configured to control a capacitance of the parasitic capacitor using a first offset capacitor, the first offset capacitor being formed by the compensation electrode.
    Type: Grant
    Filed: August 1, 2022
    Date of Patent: April 18, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sanghun Park, Soowon Kim, Jihoon Kim
  • Patent number: 11631372
    Abstract: A pixel circuit driving method is a method for driving a pixel circuit that includes a drive transistor that supplies a current corresponding to a signal voltage supplied via a signal line, a write transistor connected between the signal line and a gate electrode of the drive transistor, and an organic EL element that emits light in accordance with the current. The pixel circuit driving method includes supplying a reference potential to the gate electrode of the drive transistor before a threshold correction preparation operation of making a gate-source voltage of the drive transistor higher than a threshold voltage of the drive transistor.
    Type: Grant
    Filed: October 6, 2021
    Date of Patent: April 18, 2023
    Assignee: JOLED INC.
    Inventors: Tetsuro Yamamoto, Kenji Kokuda, Hitoshi Tsuge, Teppei Tanaka
  • Patent number: 11626062
    Abstract: A backplane operative to drive an array of emissive pixel elements forming a part of an automotive head lamp assembly is disclosed. Each pixel element comprises a memory cell operative to pulse width modulate a current mirror pixel drive circuit configured to drive an emissive element. The array of emissive pixel elements is divided into a plurality of interdigitated rows or columns serviced by independent row drivers or independent column drivers that may be driven by data selected to randomize the order in which the data on adjacent pixels of the same row are written, thereby effectively substantially reducing the visibility of any residual structures that may be present in the data driving the pixels of adjacent columns.
    Type: Grant
    Filed: February 18, 2021
    Date of Patent: April 11, 2023
    Assignee: Google LLC
    Inventors: Edwin Lyle Hudson, Robert Lo
  • Patent number: 11626073
    Abstract: A display device and an afterimage compensation method thereof are proposed. The display device and the afterimage compensation method thereof capture an input image frame at a predetermined period, detect an edge area in the captured image frame, detect an afterimage compensation area on the basis of the cumulative count detected as the edge area for each pixel, and perform individual afterimage compensation only on a pixel whose cumulative count detected as the afterimage compensation area is greater than or equal to a predetermined threshold value. Accordingly, the afterimage compensation time may be shortened by individually performing the afterimage compensation according to a condition of each pixel.
    Type: Grant
    Filed: September 24, 2019
    Date of Patent: April 11, 2023
    Assignee: LG ELECTRONICS INC.
    Inventor: Young Do Kwon
  • Patent number: 11620955
    Abstract: A display apparatus includes a display panel, a gate driver, a data driver and a driving controller. The display panel includes a gate line, a data line, a sensing line and a subpixel connected to the gate line, the data line and the sensing line. The gate outputs a gate signal to the gate line. The data driver outputs a data voltage to the data line. The driving controller controls the gate driver and the data driver. The display panel includes a first color subpixel, a second color subpixel and a third color subpixel. The driving controller is configured to determine a sensing target gate line among a plurality of gate lines based on first color data corresponding to the first color subpixel, second color data corresponding to the second color subpixel and third color data corresponding to the third color subpixel.
    Type: Grant
    Filed: May 5, 2022
    Date of Patent: April 4, 2023
    Assignee: Samsung Display Co., Ltd.
    Inventors: Chang-Soo Lee, Boyong Chung
  • Patent number: 11610551
    Abstract: A display device includes a display panel, a scan driver, a data driver, a sensing circuit, and a controller configured to select a pixel row from a plurality of pixel rows in a vertical blank period of each frame period. The vertical blank period includes a sensing time in which the sensing circuit performs a sensing operation for the selected pixel row. The sensing circuit measures a first source voltage of a driving transistor of each pixel in the selected pixel row at a first time point of the sensing time, and measures a second source voltage of the driving transistor at a second time point of the sensing time. The controller predicts a current saturated source voltage of the driving transistor based on the first and second source voltages, and determines a threshold voltage change amount of the driving transistor based on a difference between a previous saturated source voltage and the current saturated source voltage.
    Type: Grant
    Filed: January 14, 2022
    Date of Patent: March 21, 2023
    Assignees: Samsung Display Co., Ltd., Seoul National University R & DB Foundation
    Inventors: Sangik Lee, Kyeong Soo Kang, Joon-Chul Goh, Soo Yeon Lee
  • Patent number: 11605331
    Abstract: A display device may include a display panel which displays an image based on a data voltage, a driving controller including a net power control setter which determines a scale factor for adjusting a gray scale of (N+1)th frame data based on a load of Nth frame data and a net power control reference value, where the driving controller generates a data signal based on input image data, and N is a natural number greater than or equal to 2, a data driver which converts the data signal into the data voltage and outputs the data voltage to the display panel, and a power supply voltage generator which senses a power supply current applied to the display panel in an Nth frame and generates a power supply voltage based on a current level of the power supply current.
    Type: Grant
    Filed: December 20, 2021
    Date of Patent: March 14, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Kihyun Pyun, Sung-Mo Yang
  • Patent number: 11600678
    Abstract: An organic light-emitting display device comprises a first thin-film transistor disposed on a substrate; and a second thin-film transistor disposed on the substrate and spaced apart from the first thin-film transistor. The first thin-film transistor comprises a first semiconductor layer, a first conductive layer disposed on the first semiconductor layer and that overlaps the first semiconductor layer, and a first insulating layer disposed between the first semiconductor layer and the first conductive layer. The second thin-film transistor comprises a second semiconductor layer, and a second conductive layer disposed on the second semiconductor layer and that overlaps the second semiconductor layer.
    Type: Grant
    Filed: May 4, 2021
    Date of Patent: March 7, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Woo Ho Jeong, Se Myung Kwon, Yoon Ho Kim, Seok Je Seong, Joon Hoo Choi
  • Patent number: 11600680
    Abstract: The organic light emitting display device comprises a display panel having a plurality of gate lines and data lines for defining a plurality of sub-pixels; an organic light emitting device in each sub-pixel; a driving thin film transistor in each sub-pixel; a plurality of reference voltage lines in the display panel to apply a reference voltage to the sub-pixels in the display panel; and a VSS electrode connected to the reference voltage lines in the one side of the display panel to apply a VSS voltage to the reference voltage lines.
    Type: Grant
    Filed: December 16, 2019
    Date of Patent: March 7, 2023
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Young-Ho Kim, Il-Gi Jeong
  • Patent number: 11594161
    Abstract: A sensor includes a plurality of electric lines including row lines and column lines, a photodiode in a pixel, a drain of a first transistor connected to the photodiode in the pixel, a drain of a second transistor connected in series with a source of the first transistor in the pixel, a source of the second transistor being connected to a column line among the plurality of electric lines, and both a gate of the first transistor and a gate of the second transistor being connected to a row line among the plurality of electric lines, wherein a channel material of the first transistor is different from a channel material of the second transistor.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: February 28, 2023
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Kenichi Takatori
  • Patent number: 11587501
    Abstract: The present disclosure provides a display apparatus, a pixel circuit and a method of driving a pixel circuit. In one or more embodiments, the pixel circuit includes a driving transistor, a data signal module and a bias signal module. A first electrode of the driving transistor is connected with a first power signal terminal, a second electrode of the driving transistor is connected with a first terminal of a light emitting element, and the driving transistor includes a first control electrode and a second control electrode. The data signal module is connected with the driving transistor, a data writing signal terminal and a data signal terminal. The bias signal module is connected with the driving transistor, a bias writing signal terminal and a bias signal terminal, and is configured to adjust a threshold voltage of the driving transistor under control of the bias writing signal terminal and the bias signal terminal.
    Type: Grant
    Filed: October 25, 2021
    Date of Patent: February 21, 2023
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Seungwoo Han, Haoliang Zheng, Dongni Liu, Li Xiao, Liang Chen, Hao Chen, Jiao Zhao, Jin Yang, Minghua Xuan
  • Patent number: 11574568
    Abstract: A display apparatus includes a display panel, a driving controller and a data driver. The driving controller is configured to predict a panel temperature according to a position in the display panel based on input image data, to calculate a block current of a display block of the display panel and a panel resistance according to the position in the display panel based on the panel temperature, to calculate a voltage drop according to the position in the display panel based on the block current and the panel resistance and to compensate the input image data based on the voltage drop to generate a data signal. The data driver is configured to convert the data signal to a data voltage and to output the data voltage to the display panel.
    Type: Grant
    Filed: November 30, 2021
    Date of Patent: February 7, 2023
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seokha Hong, Joon-Chul Goh
  • Patent number: 11568822
    Abstract: An embodiment of a display apparatus includes a scan driver, a pixel, a first scan line electrically connecting the scan driver to the pixel, a second scan line electrically connecting the scan driver to the pixel, and a third scan line electrically connecting the scan driver to the pixel, wherein in operation: the pixel receives first, second, and third scan signals from the scan driver by way of the first, second, and third scan lines, respectively; the first and second scan signals produce a display period of a frame period in the pixel; and the third scan signal produces a black insertion period of the frame period in the pixel.
    Type: Grant
    Filed: July 15, 2021
    Date of Patent: January 31, 2023
    Inventors: Yanghwa Choi, Junghwan Hwang
  • Patent number: 11562698
    Abstract: A display panel includes multiple pixel units that are arranged regularly. A pixel circuit is connected with a scanning signal line and a data signal line. The pixel circuit receives a data voltage transmitted by the data signal line and outputs a corresponding current to a light emitting device under a control of the scanning signal line. When a first light emitting unit is in a black state, the data signal line provides a reference black state voltage to a pixel circuit of the first light emitting unit. The driving method of the display panel includes: providing, by the data signal line, a first black state voltage to a pixel circuit of a second light emitting unit when the first light emitting unit emits light and the second light emitting unit is in the black state. The first black state voltage is less than the reference black state voltage.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: January 24, 2023
    Assignees: Chengdu BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Tsanghong Wang, Guixiang Zhu, Hsinwei Huang, Mancheng Zhou, Yao Liang
  • Patent number: 11538428
    Abstract: The present disclosure provides a shift register, a drive method thereof, and a gate drive circuit. The shift register includes an input circuit, a reset circuit, a first output circuit, and a second output circuit. The input circuit is configured to provide an input signal from an input terminal to a first node. The reset circuit is configured to provide a first voltage from a first voltage terminal to the first node under the control of a reset signal from a reset signal terminal. The first output circuit is configured to output from a first output terminal one of a first clock signal and a second clock signal as a first scan signal. The second output circuit is configured to output from a second output terminal the other of the first clock signal and the second clock signal as a second scan signal.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: December 27, 2022
    Assignees: CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing BOE Technology Development Co., Ltd.
    Inventors: Shuai Chen, Xiuzhu Tang, Hailong Wu, Jianfeng Yuan, Zhi Zhang, Xuebo Liang, Qian Wang, Qiyuan Wei, Qi Li
  • Patent number: 11538421
    Abstract: A display device includes display device includes: a display panel including a plurality of pixels; a data driver configured to generate data voltages based on output image data, and to provide the data voltages to the plurality of pixels; and a controller configured to receive input image data and input frequency information from a host processor, and to provide the output image data to the data driver, wherein the controller includes an adaptive refresh block configured to: determine a target frequency by analyzing the input image data; determine a masking ratio based on an input frequency represented by the input frequency information and the target frequency; and selectively output the input image data as the output image data by performing a masking operation on the input image data with the masking ratio.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: December 27, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hongsoo Kim, Sehyuk Park, Hyo Jin Lee, Sangan Kwon, Jinyoung Roh, Sukhun Lee, Jun Heyung Jung
  • Patent number: 11538403
    Abstract: The present disclosure provides a pixel driving circuit and a display panel. The pixel driving circuit includes a driving module and a grayscale adjustment module. The driving module is configured to generate a first driving current corresponding to a first grayscale range under the control of a potential at a gate voltage end and a first power source voltage, and transmit the first driving current to a light-emitting element. The grayscale adjustment module is configured to adjust the driving module under the control of the first power source voltage and a first data voltage, so that the driving module generates a second driving current corresponding to a second grayscale range under the control of the potential at the gate voltage end and the first power source voltage, and transmits the second driving current to the light-emitting element.
    Type: Grant
    Filed: September 15, 2021
    Date of Patent: December 27, 2022
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Dongni Liu, Minghua Xuan, Qi Qi, Jing Liu
  • Patent number: 11538882
    Abstract: A display device includes a polycrystalline semiconductor including a channel and electrodes of a driving transistor; a gate electrode of the driving transistor on the channel of the driving transistor; a first storage electrode on the gate electrode of the driving transistor; a light blocking layer of a first transistor and a light blocking layer of a second transistor; an oxide semiconductor including a channel and electrodes of the first transistor, and a channel and electrodes of the second transistor; a gate electrode of the first transistor on the channel of the first transistor; and a gate electrode of the second transistor on the channel of the second transistor. The light blocking layer of the first transistor and the first storage electrode are on a same layer, and the light blocking layer of the second transistor and the gate electrode of the driving transistor are on a same layer.
    Type: Grant
    Filed: August 19, 2020
    Date of Patent: December 27, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yoon-Jong Cho, Seok Je Seong, Seong Jun Lee
  • Patent number: 11532282
    Abstract: A display may include an array of pixels. Each pixel in the array includes an organic light-emitting diode coupled to a drive transistor, a data loading transistor, a first capacitor for storing data charge, and a second capacitor. During a data programming phase, the data loading transistor may be activated to load in a data value onto the first capacitor. After the data programming phase, the second capacitor may be configured to receive a lower voltage, which extends a threshold voltage sampling time for the pixel. Configured and operated in this way, the temperature luminance sensitivity of the display can be reduced.
    Type: Grant
    Filed: October 14, 2021
    Date of Patent: December 20, 2022
    Assignee: Apple Inc.
    Inventors: Shinya Ono, Chin-Wei Lin, Zino Lee, Chun-Chieh Lin, Chen-Ming Chen
  • Patent number: 11531428
    Abstract: The disclosure provides a method for driving an OLED touch-and-display device, a driving circuit, and an OLED touch-and-display device. The method includes: generating gate driving signals that are sequentially shifted based on the first clock signal (GCK); sequentially applying the gate driving signals that are sequentially shifted to the plurality of GLs; writing display data in a display driving period for each row of pixels, to the row of pixels, wherein a time length of the display driving period depends on a corresponding gate driving signal and is smaller than the clock cycle; and for a display driving period for each of at least one row of pixels, setting a touch detection period corresponding to the display driving period or corresponding to the display driving period for previous row of pixels at least partially overlapping with the display driving period in time.
    Type: Grant
    Filed: April 28, 2022
    Date of Patent: December 20, 2022
    Assignee: NOVATEK MICROELECTRONICS CORP.
    Inventors: Chun-Hung Chen, Kai-Wen Shao, Feng-Lin Chan, Shuo-Wen Jang
  • Patent number: 11527208
    Abstract: It is an object to decrease the number of transistors connected to a capacitor. In a structure, a capacitor and one transistor are included, one electrode of the capacitor is connected to a wiring, and the other electrode of the capacitor is connected to a gate of the transistor. Since a clock signal is input to the wiring, the clock signal is input to the gate of the transistor through the capacitor. Then, on/off of the transistor is controlled by a signal which synchronizes with the clock signal, so that a period when the transistor is on and a period when the transistor is off are repeated. In this manner, deterioration of the transistor can be suppressed.
    Type: Grant
    Filed: February 7, 2022
    Date of Patent: December 13, 2022
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Atsushi Umezaki
  • Patent number: 11527591
    Abstract: A light emitting device comprising a plurality of pixels is provided. Each of the plurality of pixels includes a light emitting element, a first transistor having a drain region connected to the light emitting element, and a second transistor having a drain region connected to a gate electrode of the first transistor. The plurality of pixels include a first pixel and a second pixel, which are adjacent to each other in a first direction. A source region of the second transistor of the first pixel and a source region of the second transistor of the second pixel share one diffusion region, and a source region, a gate electrode, and the drain region of the first transistor of the first and second pixels are sequentially arranged in one of a positive direction and a negative direction in the first direction.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: December 13, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventor: Hiromasa Tsuboi
  • Patent number: 11527207
    Abstract: An electroluminescent display device includes a display panel in which a plurality of pixels are disposed, each pixel including a first sub pixel, a second sub pixel, a third sub pixel, and a fourth sub pixel each having a different color; a data driver which supplies a data voltage to the plurality of pixels by means of a plurality of data lines; and a gate driver which supplies a gate signal to the plurality of pixels by means of a plurality of gate lines.
    Type: Grant
    Filed: September 2, 2021
    Date of Patent: December 13, 2022
    Assignee: LG DISPLAY CO., LTD.
    Inventors: JaeHyung Jo, WonHo Lee, Wondoo Kim
  • Patent number: 11527196
    Abstract: A driving circuit for driving a light emitting unit is provided. The driving circuit includes a driving transistor, a switch transistor, an emitting transistor, a first capacitor and a first compensation transistor. The switch transistor is coupled to the driving transistor. The emitting transistor is coupled between the light emitting unit and the driving transistor. The first capacitor is coupled to the driving transistor. The first compensation transistor is coupled to the first capacitor. A first end of the first compensation transistor and a first end of the emitting transistor receive same signal.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: December 13, 2022
    Assignee: Innolux Corporation
    Inventors: Ming Chun Tseng, Kung-Chen Kuo, Lien-Hsiang Chen, Chi Lun Kao
  • Patent number: 11521538
    Abstract: A display device includes a display area including a plurality of pixels; a low-grayscale dithering controller selecting a dither grayscale according to an input grayscale of input image data that is in a low grayscale range below a threshold grayscale, and generating dithered input image data by performing a dithering operation on the input image data of the low grayscale range based on the dither grayscale; and a display driver driving the plurality of pixels based on the dithered input image data.
    Type: Grant
    Filed: July 21, 2021
    Date of Patent: December 6, 2022
    Inventors: A Ra Jo, Kang Hee Lee
  • Patent number: 11521572
    Abstract: Techniques for holographic display by modulating optical images in amplitude and phase via a layer of liquid crystals are described. According to one aspect of the techniques, a voltage being applied or coupled across the layer of liquid crystals is controlled by gradually increasing the voltage from a low level to a high level to perform the AM in a first range and the PM in second range, where the characteristics of the liquid crystals is significant, for example, by increasing the thickness or optical birefringence of the layer of liquid crystals.
    Type: Grant
    Filed: March 22, 2022
    Date of Patent: December 6, 2022
    Inventors: Darwin Hu, Cheng Hsing Liao
  • Patent number: 11508308
    Abstract: A display apparatus includes a display panel, a scan driver, a data driver and a timing controller. The display panel includes a plurality of pixels that are connected to a plurality of data lines and a plurality of scan lines having different lengths. The scan driver apply a plurality of scan signals to the plurality of scan lines. The data driver apply a plurality of data voltages to the plurality of data lines, and receive a plurality of sensing data that represent operating characteristics of all of the plurality of pixels from a plurality of sensing lines. The timing controller controls operations of the scan driver and the data driver, generates output image data considering the operating characteristics of all of the plurality of pixels and supply the output image data to the data drive.
    Type: Grant
    Filed: May 6, 2021
    Date of Patent: November 22, 2022
    Inventors: Jae Hoon Shin, Kyung Man Kim
  • Patent number: 11508299
    Abstract: The present disclosure provides a pixel driving circuit, a driving method thereof, and a display device.
    Type: Grant
    Filed: August 6, 2019
    Date of Patent: November 22, 2022
    Assignees: CHONGQING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing BOE Technology Development Co., Ltd.
    Inventors: Shiqiang Huang, Wei Hu, Huiche Lin, Jie Yang
  • Patent number: 11500261
    Abstract: An electrophoretic display and a driving method thereof are provided. The electrophoretic display includes a display panel and a driving circuit. The display panel includes an electrophoretic unit and a driving substrate. The electrophoretic unit includes a plurality of electrophoretic particles. The driving substrate is disposed below the electrophoretic unit. The driving circuit is coupled to the driving substrate. The driving circuit sequentially provides a first reset signal and a second reset signal to the driving substrate during a reset period to reset the plurality of electrophoretic particles. The first reset signal sequentially includes a first sub-balanced signal and a first sub-mixed signal. The second reset signal sequentially includes a second sub-balanced signal and a second sub-mixed signal.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: November 15, 2022
    Assignee: E Ink Holdings Inc.
    Inventors: Hsin-I Wu, Chien-Hung Chen, Chen-Kai Chiu, Chih-Yu Cheng
  • Patent number: 11501702
    Abstract: An electronic device includes a display panel which includes a plurality of light emitting elements and in which a plurality of areas is defined based on the plurality of light emitting elements, a compensation unit which calculates compensation values for image data provided to each of the plurality of areas, and a control unit which controls the output of the image data provided to the display panel based on the compensation values and the image data, where the control unit may include a correction unit which outputs a correction ratio of each of the plurality of areas based on the compensation values and a comparison unit which determines whether an input current of the image data is in a normal range based on the correction ratio.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: November 15, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Wonjin Seo, Eunjin Choi, Kihyun Pyun
  • Patent number: 11501723
    Abstract: An operation method of a backlight module is disclosed. The operation method includes: determining whether a first video synchronization signal is received; in response to a determination that the first video synchronization signal is received, activating a counter, and controlling the backlight module to emit light a specific number of times at a first brightness for a first time period; determining whether the counter is timeout and a second video synchronization signal is not received; and in response to a determination that the counter is timeout and the second video synchronization signal is not received, controlling the backlight module to switch between lighting and not lighting multiple times within a second time period.
    Type: Grant
    Filed: March 16, 2021
    Date of Patent: November 15, 2022
    Assignee: Qisda Corporation
    Inventors: Wei-Jou Chen, Chen-Yang Hu
  • Patent number: 11495171
    Abstract: A display module includes a display panel including an inorganic light emitting element and a pixel circuit configured to provide a driving current to the inorganic light emitting element; and a driver configured to drive the pixel circuit. The pixel circuit includes a pulse amplitude modulation (PAM) circuit configured to control an amplitude of the driving current based on an applied PAM data voltage, and a pulse width modulation (PWM) circuit configured to control a pulse width of the driving current based on an applied PWM data voltage. The driver includes a power supply circuit configured to provide, to the PAM circuit, a first power supply voltage for driving the PAM circuit, and provide, to the PWM circuit, a second power supply voltage for driving the PWM circuit.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: November 8, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jinho Kim, Tetsuya Shigeta, Taesoon Park, Sangmin Shin, Youngki Jung
  • Patent number: 11488563
    Abstract: The present disclosure relates to a device and a method for processing image data for driving a display panel. More particularly, it relates to a device and a method to vary the brightness of each pixel according to a representative brightness value of an image.
    Type: Grant
    Filed: March 3, 2021
    Date of Patent: November 1, 2022
    Assignee: SILICON WORKS CO., LTD.
    Inventors: Young Jun Jun, Bo Sung Kim
  • Patent number: 11475848
    Abstract: A display apparatus includes a first compensator, a second compensator and a display panel including pixels. The first compensator generates a first compensation coefficient based on sensing data of a pixel of the pixels for a first grayscale value, generates a second compensation coefficient based on camera imaging data for a second grayscale value greater than the first grayscale value and compensates image data based on the first compensation coefficient and the second compensation coefficient. The second compensator compensates the image data by modeling sensing data of entire grayscale range based on sensing data of the pixel for a third grayscale value and a fourth grayscale value. The display panel displays an image based on the image data compensated by the first compensator and the second compensator.
    Type: Grant
    Filed: April 6, 2021
    Date of Patent: October 18, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Min-Seok Bae
  • Patent number: 11462146
    Abstract: A display device includes a display unit including a pixel which displays an image based on a first power voltage and a data signal, a gamma voltage generator which generates gamma voltages, and a data driver which generates the signal using the gamma voltages and provides the data signal to the pixel. The gamma voltage generator generates first and second reference voltages, generates first and second corrected reference voltages by correcting the first and second reference voltages using a target voltage and an external power voltage provided from the display unit in correspondence with the first power voltage, and generates the gamma voltages by dividing the first and second corrected reference voltages. The gamma voltage generator sets the target voltage based on at least one selected from the first reference voltage, the second reference voltage, and a ground voltage.
    Type: Grant
    Filed: November 5, 2021
    Date of Patent: October 4, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Se Byung Chae, Su Bin Kim, Jin Young Jeon
  • Patent number: 11462162
    Abstract: A pixel circuit operates to output a high drive current for high-current display applications by operating the drive transistor in the triode region. To maintain operation of the drive transistor in the triode region in a stable manner, the source-drain voltage dependence of the output current of the drive transistor is compensated with a bias transistor, which keeps the drain voltage of the drive transistor constant at a target drain voltage. The bias transistor is controlled by an operational amplifier (Opamp) running a negative feedback loop to ensure a fixed target voltage occurs at the drain of the drive transistor. To configure the negative feedback loop, the Opamp output terminal is connected to the gate of the bias transistor, with the negative terminal being connected to the drain of the drive transistor and the positive terminal being connected to a voltage supply line that supplies the target voltage.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: October 4, 2022
    Assignee: Sharp Display Technology Corporation
    Inventor: Adnan Heganovic
  • Patent number: 11450266
    Abstract: A luminance control unit includes: a driving power voltage setting unit configured to determine a driving power voltage to be provided to a display panel, the driving power voltage corresponding to a target brightness, based on a plurality of driving power voltages respectively corresponding to a plurality of reference brightnesses of the display panel; and a gamma voltage setting unit configured to determine a target luminance corresponding to the target brightness, based on a plurality of target luminances respectively corresponding to the plurality of reference brightnesses, and to set gamma voltages for implementing the target luminance, wherein the driving power voltage and the gamma voltages are differently set with respect to the same reference brightness according to an ambient illumination intensity of the display panel.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: September 20, 2022
    Assignee: Samsung Display Co., Ltd.
    Inventors: Si Beak Pyo, Sung Kook Kim
  • Patent number: 11450264
    Abstract: The display device includes a substrate including a sensor area, a display panel including a first pixel disposed in the sensor area, and a sensor disposed between the substrate and the display panel and overlapping the sensor area. The sensor area includes pixel areas in which the first pixel is disposed and transmission areas in which the first pixel is not disposed, the transmission areas include a first transmission area, the pixel areas include a first pixel area positioned in a first direction of the first transmission area and a second pixel area positioned in a second direction crossing the first direction of the first transmission area, the first pixel includes a first pixel circuit, some of transistors of the first pixel circuit are disposed in the first pixel area, and others of the transistors of the first pixel circuit are disposed in the second pixel area.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: September 20, 2022
    Inventors: Sung Jin Hong, Yoo Min Ko, Gun Hee Kim, Seung Chan Lee