Backlight Control Patents (Class 345/102)
  • Patent number: 11367411
    Abstract: Detecting ambient light incident on a display includes: detecting incident light at a first photosensor; producing, at the first photosensor, a first measurement signal in response to detecting the incident light at the first photosensor; transmitting the first measurement signal to blink detection circuitry; deriving, at the blink detection circuitry, a blink rate signal from the first measurement signal, in which the blink rate signal is indicative of both an on-period during which light is emitted by a display and an off-period during which light is not emitted by the display; transmitting the blink rate signal to a second photosensor; and detecting incident light at the second photosensor during the off-period of the blink rate signal.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: June 21, 2022
    Assignee: Google LLC
    Inventor: Kuan-Lin Chen
  • Patent number: 11365851
    Abstract: A lighting module includes a mounting board; a plurality of first light sources located on the mounting board; and one or more second light sources located on the mounting board. A wavelength range and/or a correlated color temperature of the plurality of first light sources is different from a wavelength range and/or a correlated color temperature of the one or more second light sources. A quantity of the first light sources is greater than a quantity of the one or more second light sources. A light distribution angle of each of the one or more second light sources is greater than a light distribution angle of each of the plurality of first light sources.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: June 21, 2022
    Assignee: NICHIA CORPORATION
    Inventors: Tomonori Ozaki, Motokazu Yamada
  • Patent number: 11348511
    Abstract: Two extended embedded Display Port displays may be enabled by using a single set of panel power sequencing (PPS) signals from a chipset to enable the two embedded Display Port panels. To enhance the user experience, the backlight module brightness is controlled by making use of a pin available on a system on a chip (SOC) and modification of drivers. This helps to save power when only one panel is used. When both panels are used simultaneously, power savings can be achieved by using backlight control signals.
    Type: Grant
    Filed: April 5, 2016
    Date of Patent: May 31, 2022
    Assignee: Intel Corporation
    Inventors: Mallari C. Hanchate, Ganesh R. S.T., Bharath Kumar, Sameer Kp
  • Patent number: 11348541
    Abstract: According to one embodiment, a display device includes a display panel including a first sub display area and a second sub display area, and an illumination device, wherein the illumination device includes a first light source opposed to the first sub display area, a second light source opposed to the second sub display area, and a partition positioned between the first and second light sources and the display panel, and the partition includes a first side surface surrounding the first light source, a second side surface surrounding the second light source, and a connector which connects the first side surface and the second side surface, and the connector is formed of curved surfaces, or two or more flat surfaces, or a combination of curved surfaces and flat surfaces.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: May 31, 2022
    Assignee: Japan Display Inc.
    Inventors: Shigenori Aoki, Tatsuya Yata, Tsutomu Harada
  • Patent number: 11348542
    Abstract: Provided is a driving method for a display device. The driving method includes: obtaining, by the driving chip, a theoretical brightness value of the light-emitting diode in each of the plurality of light-exiting sub-areas based on an image to be displayed on the display panel; obtaining an actual brightness look-up table, searching the actual brightness look-up table for an actual brightness value closest to the theoretical brightness value, and setting the actual brightness value closest to the theoretical brightness value as a first brightness value; and generating a first pulse signal based on the first brightness value and outputting the first pulse signal to the switch in each of the plurality of light-exiting sub-areas, in such a manner that the switch controls, under driving of the first pulse signal, the light-emitting diode to emit light under an action of a first power supply signal and a second power supply signal.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: May 31, 2022
    Assignee: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Conghua Ma, Lihua Wang, Xiaoping Sun, Qiang Dong
  • Patent number: 11348552
    Abstract: A method for determining a data processing sequence, for determining a selected color in a plurality of colors display by subpixels included in each pixel of a display apparatus, and the method comprising: determining, according to grayscale values of subpixels of candidate colors in a plurality of pixels included in a plurality of frames of images displayed in a current detection cycle, a usage level representative value of each candidate color in the current detection cycle; and selecting one of the candidate colors as a selected color of a next detection cycle according to detection sequence determining parameters, the detection sequence determining parameters including the usage level representative value of each candidate color in the current detection cycle. By this method, the subpixels of colors with large usage level representative values may be detected and compensated in time.
    Type: Grant
    Filed: January 23, 2019
    Date of Patent: May 31, 2022
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Danna Song
  • Patent number: 11347128
    Abstract: A display apparatus. The display apparatus includes a back light module; a light transmission direction controller on a light emitting side of the back light module; and a plurality of subpixels on a side of the light transmission direction controller away from the back light module, each individual one of the plurality of subpixels including a light transmissive part and a light blocking part. The back light module is configured to emit light toward the plurality of subpixels. The light transmission direction controller is configured to independently adjust a grayscale of each individual one of the plurality of subpixels by independently controlling a light distribution ratio between a first portion of light transmitted through the light transmissive part and a second portion of light blocked by the light blocking part in each individual one of the plurality of subpixels.
    Type: Grant
    Filed: November 23, 2018
    Date of Patent: May 31, 2022
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Jifeng Tan, Xiandong Meng, Wei Wang, Jian Gao, Wenqing Zhao, Xiaochuan Chen
  • Patent number: 11347089
    Abstract: A light control device including a drive voltage output unit that outputs a drive voltage, a control unit that causes the drive voltage output unit to gradually increase or gradually decrease a magnitude of the drive voltage, a light control sheet including light control units connected in parallel to the drive voltage output unit and formed such that light transmittances of the light control units change according to magnitudes of voltages applied to the light control units, and a voltage dividing circuit which is connected to one of the light control units and divides the drive voltage common to each of the light control units such that the magnitude of the voltage applied to the light control unit connected to the voltage dividing circuit differs from the magnitude of the voltage applied to at least one of other light control units.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: May 31, 2022
    Assignee: TOPPAN PRINTING CO., LTD.
    Inventors: Wataru Ohkubo, Masanori Sakamoto
  • Patent number: 11335277
    Abstract: A method, an apparatus, and a device for adjusting screen backlight brightness. The method includes: obtaining image information and information about an environment; determining human eye characteristic information based on the image information and the information about the environment, where the human eye characteristic information is related to a minimum magnitude of a brightness change perceptible to human eyes; obtaining information about a display screen, calculating a screen backlight decreasable ratio based on the information about the display screen, the human eye characteristic information, and the image information; and determining a screen pixel brightness compensation value based on the backlight decreasable ratio, adjusting backlight brightness based on the screen backlight decreasable ratio, and adjusting the screen pixel brightness value based on the screen pixel brightness compensation value.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: May 17, 2022
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Jinsong Wen, Jinqin Ai, Haixiao Liu
  • Patent number: 11330687
    Abstract: A method of controlling a power supply electrically coupled to a dimmer includes receiving a current pulse-width-modulated (PWM) pulse of a plurality of PWM pulses corresponding to a dimmer level, calculating a current duty cycle of the current PWM pulse, comparing the current duty cycle with a window of validity to determine whether the current duty cycle is within the window of validity, and in response to determining that the current duty cycle is not within the window of validity, determining whether a count of out-of-range PWM pulses having duty cycles not within the window of validity is greater than a threshold, and in response to determining that the count of out-of-range PWM pulses is greater than the threshold generating a sample value corresponding to the current duty cycle for transmission to the power supply.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: May 10, 2022
    Assignee: ERP POWER, LLC
    Inventor: Steven C. Krattiger
  • Patent number: 11328690
    Abstract: A method for adjusting brightness of a display screen includes: in response to a brightness adjustment trigger operation, determining a target brightness level of the display screen based on a current brightness level of the display screen; obtaining a corresponding physical brightness and a corresponding display coefficient based on the target brightness level, wherein the display coefficient is smaller than 1, and the physical brightness is included in a physical brightness range in high brightness mode of the display screen; and controlling the display screen to display at a target display brightness based on the obtained physical brightness and the obtained display coefficient.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: May 10, 2022
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Yuan Zhang, Haining Huang
  • Patent number: 11322114
    Abstract: Provided are a computer program products, systems, and methods for directing a system to control an intensity of light emanating from a display positioned within a vehicle to display content to be viewed from outside of the vehicle. The system determines whether the system is operating in a first mode or a second mode based on at least one vehicle operating condition. A light level within the vehicle is sampled more frequently during the second mode than during the first mode. A determination is made as to whether a threshold change in the sampled light level occurs when in the second mode, and an intensity of the display is adjusted in response to the occurrence of a threshold change.
    Type: Grant
    Filed: August 28, 2020
    Date of Patent: May 3, 2022
    Assignee: UVERTZ, LLC
    Inventor: Christopher M. Bohnert
  • Patent number: 11313545
    Abstract: The application discloses a direct-type panel lamp with adjustable light emitting function, which comprises a frame, a diffusion plate, a back plate and at least one light bar; a central area of the back plate is arched to form a chamber for accommodating the light bar; the diffusion plate has a light-transmitting function, which is disposed opposite to the back plate to close the chamber; the frame is formed by connecting a plurality of frame bars, with each frame bar being connected to corresponding edges of the diffusion plate and the back plate; for the same light bar, the LED beads comprise a plurality of first LED beads and a plurality of second LED beads, and wherein the first LED beads and the second LED beads are alternately arranged, and the brightness or color temperature of the first and second LED beads are different.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: April 26, 2022
    Assignee: CH LIGHTING TECHNOLOGY CO., LTD.
    Inventors: Jiangfeng Jiang, Jizhong Pu
  • Patent number: 11315503
    Abstract: A liquid crystal display panel is provided. The liquid crystal display panel includes a liquid crystal display panel, a backlight module and a control circuit. The control circuit is coupled to the liquid crystal display panel and the backlight module. The control circuit is configured to control the liquid crystal display panel to display a corresponding image according to image data, and control the backlight module to provide backlight to the liquid crystal display panel. The control circuit determines a turn-on time point of each of a plurality of zones of the backlight module according to a response time of the liquid crystal display panel and a writing period of at least one target display area of the liquid crystal display panel. The control circuit further determines the turn-on time length of each zone according to the image data corresponding to the grayscale data of each zone.
    Type: Grant
    Filed: January 28, 2021
    Date of Patent: April 26, 2022
    Assignee: Wistron Corporation
    Inventors: Yuanliang Liu, Junxin Qiu, Lixing Zhu, Mingyue Geng, Chih-Chou Chou
  • Patent number: 11308917
    Abstract: The amount of calculation related to correction of an image signal in a display device is suppressed. A liquid crystal display device includes a backlight luminance distribution calculation unit configured to calculate an intensity of illumination light from a backlight in a pixel of interest, and the backlight luminance distribution calculation unit calculates the intensity of illumination light with reference to a one-dimensional lookup table indicating a relationship between a distance from one of control areas included in the backlight to the pixel of interest and the intensity of illumination light at the distance.
    Type: Grant
    Filed: August 14, 2019
    Date of Patent: April 19, 2022
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Aya Okamoto, Naoko Goto
  • Patent number: 11308908
    Abstract: A liquid crystal display panel and a driving method thereof. The liquid crystal display panel comprises: a pixel unit module comprising a plurality of pixel units arranged in a matrix; a plurality of scanning lines, each of the scanning lines connected to at least two of the pixel units on a same row; a gate driving circuit connected to the plurality of scanning lines and providing gate signals for the scanning lines to control the pixel units, which the scanning lines are connected to, to be turned on; a plurality of data lines respectively connected to at least one pixel unit on different columns; a data driving circuit, which is connected to the plurality of data lines and provides data signals for the data lines to charge the turn-on pixel units which the data lines are connected to.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: April 19, 2022
    Inventors: Shan Wang, Yichien Wen
  • Patent number: 11301971
    Abstract: The present disclosure relates to a method and device for obtaining a second image from a first image when the dynamic range of the luminance of the first image is greater than the dynamic range of the luminance of the second image. The disclosure describes deriving at least one component representative of the colors of the second image from the first image, and maximizing at least one derived component according to a maximum value depending on a linear-light luminance component of the first image.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: April 12, 2022
    Assignee: INTERDIGITAL VC HOLDINGS, INC.
    Inventors: Robin Le Naour, David Touze, Catherine Serre
  • Patent number: 11303739
    Abstract: A mobile terminal and a control method therefor including a primary body having a first display screen and at least one secondary body having a second display screen. An accommodating mechanism and a first connection mechanism are provided on at least one side of the primary body. The first connection mechanism has a retracted state accommodated in the accommodating mechanism and an extended state popped up from the accommodating mechanism. A second connection mechanism is provided on at least one side of the secondary body. The extended first connection mechanism is connected to the connection mechanism so that the primary body and the secondary body are combined into a multi-screen terminal.
    Type: Grant
    Filed: February 2, 2018
    Date of Patent: April 12, 2022
    Assignee: XI'AN ZHONGXING NEW SOFTWARE CO., LTD.
    Inventor: Li Cao
  • Patent number: 11302250
    Abstract: A method and a device for luminance adjustment for a display panel are provided. The method includes: dividing a display zone into a plurality of compensation zones; acquiring a difference between an initial luminance value and a pre-determined reference luminance value in each of the plurality of compensation zones; obtaining an adjusted current by adjusting a current in an organic light-emitting diode (OLED) for a sub-pixel in a compensation zone corresponding thereto according to the difference for the compensation zone; and obtaining a target luminance value by compensating the initial luminance value for the compensation zone corresponding thereto according to the adjusted current.
    Type: Grant
    Filed: January 14, 2019
    Date of Patent: April 12, 2022
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Kerong Wu
  • Patent number: 11295653
    Abstract: A method for detecting ambient light by a terminal is provided. The method includes displaying a black picture for at least two times in a first area of a display area of a display screen of a terminal, displaying an image frame picture in a second area of the display area when the black picture is displayed in the first area, displaying the image frame picture in the first area in an interval between displaying the black picture in the first area for two times, and obtaining, by the terminal, an intensity of ambient light, wherein the intensity of the ambient light is detected by a first ambient light sensor when the first area displays the black.
    Type: Grant
    Filed: August 10, 2018
    Date of Patent: April 5, 2022
    Assignee: Honor Device Co., Ltd.
    Inventors: Chenlong Li, Hongxia Gui, Xin Zhao
  • Patent number: 11295705
    Abstract: A method for adjusting brightness of a display screen includes: in response to a brightness adjustment trigger operation, determining a target brightness level of the display screen based on a current brightness level of the display screen; obtaining a corresponding physical brightness and a corresponding display coefficient based on the target brightness level, wherein the display coefficient is smaller than 1, and the physical brightness is included in a physical brightness range in high brightness mode of the display screen; and controlling the display screen to display at a target display brightness based on the obtained physical brightness and the obtained display coefficient.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: April 5, 2022
    Assignee: BEIJING XIAOMI MOBILE SOFTWARE CO., LTD.
    Inventors: Yuan Zhang, Haining Huang
  • Patent number: 11295670
    Abstract: An apparatus includes a display screen, an ambient light sensor disposed behind the display screen, and an electronic control unit. An integration time of the ambient light sensor is unsynchronized to a frame rate of the display screen. The electronic control unit is operable to control a brightness of the display screen based on a duty cycle of a PWM blanking signal, wherein at least one OFF time of the PWM blanking signal occurs fully within a first integration period of the ambient light sensor, and wherein at least one other integration period ON time of the PWM blanking signal occurs fully during an ON time of the PWM blanking signal. The electronic control unit is further operable to acquire samples of an output of the ambient light sensor, to identify a highest value and a lowest value from among a consecutive group of the samples, and to estimate a magnitude of an ambient light signal based at least in part on the highest value and the lowest value.
    Type: Grant
    Filed: August 1, 2019
    Date of Patent: April 5, 2022
    Assignee: AMS AG
    Inventors: George Richard Kelly, David Harlow Sin
  • Patent number: 11295682
    Abstract: This application relates to a driving method for a display device. Turn-on/turn off of a color light source corresponding to a minimum average value in a time period of displaying a second gray-scale data group is controlled according to the determining of whether a color saturation value C falls within a specified range of a color saturation value of a display area.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: April 5, 2022
    Assignees: HKC CORPORATION LIMITED, CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Chih Tsung Kang
  • Patent number: 11296264
    Abstract: The disclosure provides a light source module including a substrate, multiple light-emitting elements, multiple reflecting elements, and an encapsulation layer. The reflecting elements and light-emitting elements are disposed in stack arrangement in the direction perpendicular to the substrate surface, respectively. The encapsulation layer disposed between the reflecting elements and light-emitting elements includes multiple first grooves and main portions. The first grooves located between the light-emitting elements are connected to each other. The main portions cover the light-emitting elements, and the reflecting elements and the light-emitting elements are disposed in the central position of the main portions having multiple first inclined ridges disposed around the central position to define the first grooves in the first direction parallel to the extending direction of the substrate surface.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: April 5, 2022
    Assignee: Coretronic Corporation
    Inventors: Wen-Hsun Yang, Yu-An Huang, Shih-Yi Lin
  • Patent number: 11289053
    Abstract: The method for correcting brightness of a display panel includes: starting a brightness correction process according to a brightness correction starting instruction; obtaining a first curve representing a relationship between absolute values of input voltages of the transparent display area and light emitting brightness values of the transparent display area in a current state; recording the first curve as a relationship curve showing a relationship between absolute values of input voltages and light emitting brightness values of the transparent display area for correcting brightness; and adjusting an input voltage of the transparent display area according to the first curve, so that a front-side light emitting brightness value of the transparent display area is consistent with a light emitting brightness value of the non-transparent display area.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: March 29, 2022
    Assignee: YUNGU (GU'AN) TECHNOLOGY CO., LTD.
    Inventor: Junhui Lou
  • Patent number: 11289006
    Abstract: Example display power management control circuitry is to determine a baseline image quality parameter associated with a baseline display power mode based on: a baseline first relationship parameter associated with a first relationship between original and boosted pixel values; a baseline percentage of pixels having a color value; and a baseline second relationship parameter associated with a second relationship between the numbers of original pixel values and boosted pixel values; determine a value of a subsequent first relationship parameter based on an adjusted second relationship parameter and a second percentage of pixels having the color value; determine a second image quality parameter associated with the subsequent first relationship parameter, the adjusted second relationship parameter, and the second percentage of pixels; and select the subsequent first relationship parameter and the adjusted second relationship parameter based on comparing the second image quality parameter to the baseline image qua
    Type: Grant
    Filed: March 1, 2021
    Date of Patent: March 29, 2022
    Assignee: Intel Corporation
    Inventors: Junhai Qiu, Ajit Joshi, Jun Jiang, Sherine Abdelhak, Shravan Kumar Belagal Math, Nandini Mahendran
  • Patent number: 11289033
    Abstract: A display device with switchable viewing angle includes a display panel, a backlight source, a timing controller, a source driver chip and an LED driver module. The backlight source includes a plurality of LEDs. The timing controller is connected to the source driver chip. The source driver chip is connected to the plurality of data lines. The LED driver module is connected to the plurality of LEDs. The display panel has a narrow viewing angle mode and a wide viewing angle mode. In the narrow viewing angle mode, the luminous brightness of the plurality of LEDs is adjusted to gradually decrease from the middle to both sides of the display panel. In the wide viewing angle mode, the luminous brightness of the plurality of LED is adjusted to gradually increase from the middle to both sides of the display panel.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: March 29, 2022
    Assignee: INFOVISION OPTOELECTRONICS (KUNSHAN) CO., LTD.
    Inventors: Hung-Ming Lee, Hsin-Chieh Lai, Pei-Yang Lin, Chunyun Wu
  • Patent number: 11288990
    Abstract: A display apparatus including: image renderer having array of pixels; liquid-crystal device comprising: liquid-crystal structure, wherein portions of liquid-crystal structure are arranged in front of corresponding pixels of said array; and control circuit including circuit elements employed to electrically control corresponding portions of liquid-crystal structure to shift light emanating from corresponding pixels to corresponding target positions; and processor(s) configured to: generate individual drive signals for circuit elements, based on corresponding target positions to which light emanating from corresponding pixels are to be shifted upon passing through corresponding portions of liquid-crystal structure; and send individual drive signals to control circuit to drive circuit elements to address corresponding portions of liquid-crystal structure separately, whilst displaying output image frame via image renderer.
    Type: Grant
    Filed: March 12, 2021
    Date of Patent: March 29, 2022
    Assignee: Varjo Technologies Oy
    Inventors: Mikko Strandborg, Klaus Melakari
  • Patent number: 11287925
    Abstract: An electronic circuit, adapted to drive a display panel comprising touch sensors, is provided. The electronic circuit can include a display driving circuit, a timing circuit and a touch scan circuit. The display driving circuit drives a touch display panel. The timing circuit receives a flag signal from a processing circuit and generates a scan start signal according to the flag signal. The touch scan circuit generates a plurality of touch scan signals according to the scan start signal and a touch column synchronization signal. The touch scan circuit determines a start time of a touch frame period according to a pulse of the scan start signal. The scan start signal can be asynchronous or delayed with respect to a touch frame synchronization signal generated by the display driving circuit.
    Type: Grant
    Filed: August 17, 2020
    Date of Patent: March 29, 2022
    Assignee: Novatek Microelectronics Corp.
    Inventors: Chung-Cher Lin, Yun-Hsiang Yeh, Ta-Keng Weng, Yi-Min Li
  • Patent number: 11282438
    Abstract: A driver circuit configured to receive a display data and drive a display panel is provided. The display panel includes a plurality of light-emitting diode devices according to the display data. The driver circuit includes a data driver. The data driver is configured to output driving signals to drive the light-emitting diode devices according to the display data and operate in different operation modes according to a control signal. The data driver includes a plurality of output channels. The output channels output the driving signals to drive the light-emitting diode devices via respective output terminals of the driver circuit. An assignment relationship of the display data and the output channels is different in the different operation modes. A display apparatus including the driver circuit is also provided.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: March 22, 2022
    Assignee: Novatek Microelectronics Corp.
    Inventors: Chun-Wei Kang, Jhih-Siou Cheng, Chun-Fu Lin, Po-Hsiang Fang, Ju-Lin Huang
  • Patent number: 11274949
    Abstract: Light emitted from laser light source is divided by prism into two light flux and light flux corresponding to light emitted from slope and slope. Light flux and light flux are diffused by diffusion plate and diffusion plate to become light flux and light flux. By overlapping light flux and light flux, a radiation distribution with a wide angle and high light intensity can be obtained.
    Type: Grant
    Filed: March 23, 2020
    Date of Patent: March 15, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Atsushi Fukui, Kazumasa Takata
  • Patent number: 11276356
    Abstract: A backlight unit of the present disclosure includes: a backlight including a plurality of light-emitting devices that are allowed to emit light at mutually different timings and include a first light-emitting device and a second light-emitting device; and a controller that controls a light emission operation of the backlight to cause the first light-emitting device and the second light-emitting device to emit light with mutually different average light emission intensities in a first sub-frame period of a plurality of sub-frame periods provided corresponding to a frame period.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: March 15, 2022
    Inventors: Norimasa Furukawa, Shingo Kimura, Kazuhiro Horiuchi, Kenichi Nakaki
  • Patent number: 11276345
    Abstract: Embodiments relate to a display device that includes a control circuit, an array of light emitting diode (LED) zones, and an array of zone integrated circuits that are distributed in the display area. The zone integrated circuits may comprise integrated LED and driver circuits with embedded sensors or the zone integrated circuits may comprise dedicated sensor devices. The zone integrated circuits are arranged in groups that are coupled to a shared single wire communication line. The control circuit provides control signals that control the driver circuits to drive the LED zones and may provide commands to request feedback data from the zone integrated circuits. Responsive to the commands, the zone integrated circuits output feedback data that is provided to the control circuit via the shared single wire communication line.
    Type: Grant
    Filed: October 9, 2020
    Date of Patent: March 15, 2022
    Assignee: Huayuan Semiconductor (Shenzhen) Limited Company
    Inventors: Chih-Chang Wei, Junjie Zheng, Richard Landry Gray, Ping-Yuan Lin, Jyun-Long Lin, Lilun Chi
  • Patent number: 11269211
    Abstract: A display device is disclosed. An embodiment of the display device includes a display panel, a plurality of light assemblies configured to provide light to the display panel, a light absorbing layer positioned on a path of light that is provided to the display panel by the plurality of light assemblies, the light absorbing layer configured to absorb light of a predetermined wavelength range, and a light shielding layer between the light assembly and the display panel, wherein the light shielding layer is configured to simultaneously shield the light provided by the plurality of light assemblies at a first portion and allow the light provided by the plurality of light assemblies to pass at a second portion.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: March 8, 2022
    Assignee: LG ELECTRONICS INC.
    Inventors: Changhwan Yi, Dongho Ham, Sangyeol Kim
  • Patent number: 11270655
    Abstract: The present disclosure relates to a display apparatus and a method for monitoring the same. A display apparatus is provided. The display apparatus comprises a display unit, a backlight module, a light sensor, and a controller. The backlight module is located on a first side of the display unit. The light sensor is located on a second side of the display unit different from the first side. The light sensor faces away from the display unit for detecting light comprising ambient light and reflected light from the display unit and generates a first brightness value. The controller determines the display apparatus malfunction based on the first brightness value.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: March 8, 2022
    Assignee: DYNASCAN TECHNOLOGY CORP.
    Inventors: Tsun-I Wang, Ching-Chun Wu, Chia-Liang Yang
  • Patent number: 11270662
    Abstract: A display driver comprises signal supply circuitry and control circuitry. The control circuitry is configured to generate a first luminance value using a DBV. The signal supply circuitry is configured to supply to a display panel at least one signal using the first luminance value. The first luminance value has a one-to-one correlation with the display brightness level. The DBV does not have a one-to-one correlation with the display brightness level.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: March 8, 2022
    Assignee: Synaptics Incorporated
    Inventors: Hirobumi Furihata, Masao Orio, Tomoo Minaki, Akio Sugiyama, Kazutoshi Aogaki
  • Patent number: 11270665
    Abstract: Provided are a display device and a method of controlling a brightness of the display device. The method of controlling a brightness of the display device according to an embodiment includes: applying first input image data to a display unit including a plurality of pixels to display a first image; detecting a brightness for each pixel from output image data of the first image displayed on the display unit, and extracting compensation pixels each having a brightness difference exceeding a reference value, the brightness difference being a difference between a detected brightness and a reference brightness; and generating compensation data of the compensation pixels based on the brightness differences of the compensation pixels.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: March 8, 2022
    Assignee: SAPIEN SEMICONDUCTORS INC.
    Inventor: Jae Hoon Lee
  • Patent number: 11263982
    Abstract: A display having a variably controlled backlight and/or driver is disclosed. The backlight includes a first light source that emits light within a first spectral power distribution and has a first radiant power output. A second light source emits light within a second spectral power distribution matched to an optical filter for producing a perceived chromaticity and luminosity matching the perceived display appearance without the optical filter.
    Type: Grant
    Filed: December 4, 2020
    Date of Patent: March 1, 2022
    Assignee: Rockwell Collins, Inc.
    Inventors: Albert N. Stuppi, Brian W. Walker, Alan M. Kuefler, Duane A. Grave
  • Patent number: 11262235
    Abstract: A device for detecting light intensity, a display screen and a mobile terminal are provided. The device for detecting light intensity includes a controller, and a first photosensitive sensor and a second photosensitive sensor which are electrically coupled to the controller, the first photosensitive sensor and the second photosensitive sensor being spaced apart and located in a same illumination environment, and the controller is configured to, when an external beam illuminates the first photosensitive sensor, perform calculation based on a difference value between illumination parameters of the first photosensitive sensor and the second photosensitive sensor to obtain a light intensity of the external beam.
    Type: Grant
    Filed: January 16, 2020
    Date of Patent: March 1, 2022
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventors: Changyu Sun, Jie Fan
  • Patent number: 11250791
    Abstract: A first brightness value and a second brightness value are determined. The first brightness value relates to display performed by the display during a display time window. The second brightness value relates to an off state of the display during an off time window. The display is off during the off time window. A first drop depth value is determined according to the first brightness value and the second brightness value. A second ambient brightness value is acquired by adjusting a first ambient brightness value detected by the light sensor based on a brightness adjusting model acquired under predetermined ambient light and the first drop depth value.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: February 15, 2022
    Assignee: Beijing Xiaomi Mobile Software Co., Ltd.
    Inventor: Chaoxi Chen
  • Patent number: 11244617
    Abstract: A driving method applicable to a display device, in which the display device includes multiple pixel circuits, and the method includes: adjusting multiple control signals according to a first display data such that the pixel circuits generate a first frame; receiving a second display data generated after the display data; and adjusting the control signals according to a time duration of the first frame such that the pixel circuits generate a second frame, where brightness for each of the pixel circuits is proportional to a duty ratio of one of the corresponding control signals, and an increment for the duty ratio of one of the corresponding control signals in the second frame is negatively correlated to a difference between a ratio of a preset time period to the time duration of the first frame and a ratio of the preset time period to the time duration of the second frame.
    Type: Grant
    Filed: March 29, 2021
    Date of Patent: February 8, 2022
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Peng-Bo Xi, Chen-Chi Lin, Chia-Che Hung, Cheng-Nan Yeh, Chin-Tang Chuang, En-Chih Liu
  • Patent number: 11244636
    Abstract: An image display processing method for a display device, an image display processing device, a display device, and a storage medium are provided. The display device includes a backlight unit, the backlight unit includes a plurality of backlight blocks and is driven by a local dimming method. The image display processing method includes: obtaining backlight values of backlight blocks in N rows according to display data, which are transmitted, of pixels corresponding to the backlight blocks in the N rows in a current frame of image; based on the display data of the pixels corresponding to the backlight blocks in the N rows and the backlight values, which are obtained, of the backlight blocks in the N rows, obtaining compensated display data of the pixels corresponding to the backlight blocks in the N rows in the current frame of image.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: February 8, 2022
    Assignees: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Tiankuo Shi, Lingyun Shi, Zhihua Ji, Xin Duan, Wei Sun
  • Patent number: 11238814
    Abstract: The present disclosure illustrates a method of driving a display device, including steps of dividing an original display image into first and second display image; acquiring first, second and third mean values of the original display image; setting the mean values of the first components, the second components, and the third components of the first display image to be equal to the second mean value, and setting the mean values of the first components and the third components of the second display image to be equal to a third mean value; regulating brightness value of a backlight circuit; acquiring drive components corresponding to the pixels of the second display image; and driving the pixel units of the display device for display, according to the drive components corresponding to the pixels of the first display image and the drive components of the pixels of the second display image.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: February 1, 2022
    Assignees: HKC Corporation Limited, Chongqing HKC Optoelectronics Technology Co., Ltd.
    Inventor: Beizhou Huang
  • Patent number: 11226590
    Abstract: Provided are holographic displays and operating methods of the holographic display. The holographic display includes a backlight portion configured to emit light for displaying an image; a deflector configured to control a direction at which the image is displayed; a lens portion configured to control a location where the image to be displayed is formed to match a location that satisfies a diffraction condition; and a panel portion configured to display a 3D image by combining the image to be displayed with an interference pattern generated with respect to an overlapped hologram.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: January 18, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jungkwuen An, Hoon Song, Sunil Kim, Hongseok Lee, Joonyong Park, Chilsung Choi
  • Patent number: 11223745
    Abstract: A device for controlling a color gamut includes: a color mapping module which converts a source image signal, based on a first color gamut look-up table; and a color gamut shift module which sets a second color gamut look-up table, based on a grayscale value determined corresponding to an external factor or user setting. When the color gamut shift module is enabled, the color mapping module converts the source image signal, based on the second color gamut look-up table.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: January 11, 2022
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dale Yim, Geun Young Jeong
  • Patent number: 11222607
    Abstract: A display driving method of a display device, a driving device and the display device are provided. The display device includes a display panel and a backlight unit. The display driving method includes: sending image information of a display image to the display panel; acquiring a scanning parameter of the display image from the image information; acquiring a driving parameter of a plurality of rows of backlight blocks based on the scanning parameter of the display image, and driving the plurality of rows of backlight blocks based on the driving parameter.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: January 11, 2022
    Assignees: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Binhua Sun, Yakun Wang, Ziqiang Guo, Jian Sun, Wenyu Li, Feng Zi, Bingxin Liu, Yadong Ding, Jiyang Shao, Lin Lin
  • Patent number: 11217205
    Abstract: Embodiments herein disclose a method for modifying content in an electronic device. The method may include classifying a plurality of regions in the content, wherein at least one of a lightness factor or a brightness factor is defined for each of the regions. The method may further include obtaining at least one of a candidate lightness span or a candidate brightness span for each of the classified region from a predefined lightness span database or a predefined brightness database and identifying a current brightness level of a display of the electronic device. The method further may further include identifying at least one of an optimal lightness span or an optimal brightness span by adjusting the candidate lightness span and candidate brightness span based on the current brightness level and modifying the content corresponding to each of the classified region using at least one of the optimal lightness span and the optimal brightness span.
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: January 4, 2022
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Prashant Kisanrao Nevase
  • Patent number: 11211018
    Abstract: A grayscale compensation method and apparatus are provided. The grayscale compensation method includes: performing a grayscale compensation data detection on a display panel to obtain a first grayscale compensation data; preforming a grayscale compensation data detection on a backlight module to obtain a second grayscale compensation data; performing a data fusion on the first grayscale compensation data and the second grayscale compensation data to obtain a third grayscale compensation data; and performing a grayscale compensation on the display panel according to the third grayscale compensation data. By calculating the grayscale compensation data of the display panel and the backlight module at the same time, display brightness of the display panel is more uniform. Moreover, before the data fusion, the first and second grayscale compensation data may be reduced in resolution, the data amount of fusion calculation is less and the calculation time and storage space are saved.
    Type: Grant
    Filed: June 25, 2020
    Date of Patent: December 28, 2021
    Assignee: XIANYANG CAIHONG OPTOELECTRONICS TECHNOLOGY CO., LTD
    Inventors: Lei Sun, Yuyeh Chen, Pan Fei Zhang, Zheng Liu
  • Patent number: 11208042
    Abstract: A motor vehicle includes a rearview mirror display system with a visible surface and having a mirror mode and a display mode. The visible surface functions as a mirror in the mirror mode. The visible surface displays an electronically produced image in the display mode. An electronic processor is communicatively coupled to the rearview mirror display system. The electronic processor detects that the display mode is not operating properly, and, in response to the detecting, automatically switches the rearview mirror display system from the display mode to the mirror mode.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: December 28, 2021
    Assignee: Panasonic Automotive Systems Company of America, Division of Panasonic Corporation of North America
    Inventors: Padhu Kanagaraj, Stephanie Tuttle, Rachel Anderson
  • Patent number: 11205394
    Abstract: Disclosed are display device and a method for driving same: calculating a sub-pixel scale average value of each pixel in a pixel unit corresponding to original gray scale data to be displayed in a display region, and shutting off a light source corresponding to a sub-pixel color having the smallest average gray scale value in a backlight unit corresponding to each display region.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: December 21, 2021
    Assignees: HKC CORPORATION LIMITED, CHONGQING HKC OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Chih Tsung Kang