Brightness Or Intensity Control Patents (Class 345/77)
  • Patent number: 10803806
    Abstract: Pixel circuit and display substrate and driving methods, and display apparatus are provided.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: October 13, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xueling Gao, Chengchung Yang, Kuanjun Peng, Wei Qin, Xiangxiang Zou, Yang Yang
  • Patent number: 10804339
    Abstract: Disclosed is a naked-eye three-dimensional display device, which is from top to bottom sequentially provided with a first substrate, a light-emitting layer, a second substrate, a first indium tin oxide (ITO) electrode layer, a three-dimensional prism liquid crystal layer, a second ITO electrode layer and a third substrate. One side of the first substrate facing the light-emitting layer is provided with thin film transistors arranged in a matrix form. Since the first ITO electrode layer is disposed directly on the second substrate, a substrate and a transparent photoresist layer are not used. Thus, the weight of the device is reduced, and the display brightness and the alignment accuracy are improved. When liquid crystal prism electrode units of the first ITO electrode layer and display regions of pixel units are configured to overlap with each other, the influence of transmitted light on naked eye 3D display can be avoided and the 3D display effect is improved.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: October 13, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Limin Wang, Tai Jiun Hwang
  • Patent number: 10803785
    Abstract: An electronic device includes a display panel; a processor; and display driving integrated circuitry (DDIC). The DDIC is configured to control the display panel and includes an internal memory. The DDIC is configured to receive, from the processor while the processor operates in an active state, a first content including a plurality of images to be displayed based on a specified order through the display panel while the processor operates in a low-power state; store the first content in the internal memory; change a timing for outputting a signal corresponding to a state capable of receiving a second content based on a change of a location in which an image among the plurality of images is displayed through the display panel while the processor operates in the low-power state; and output the signal to the processor based on the changed timing.
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: October 13, 2020
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yunpyo Hong, Jong-Kon Bae, Yohan Lee, Dongkyoon Han
  • Patent number: 10802333
    Abstract: A local dimming system includes a light shape imitation (LSI) unit that receives a pulse-width modulation (PWM) value generated according to content of an image, the LSI unit generating luminance gain according to the PWM value; and a pixel compensation unit that performs pixel compensation on the image according to the luminance gain, thereby resulting in a compensated image. The LSI unit performs LSI computation by multiplying profile data with corresponding PWM values, and adding products of multiplication, thus resulting in a light shape.
    Type: Grant
    Filed: August 21, 2018
    Date of Patent: October 13, 2020
    Assignee: Himax Technologies Limited
    Inventor: Yun-Sheng Lin
  • Patent number: 10762851
    Abstract: A display device includes: a display panel including a plurality of pixels; a scan driver configured to supply a scan signal to the plurality of pixels through a plurality of scan lines based on a scan start signal; an emission driver configured to supply an emission control signal to the plurality of pixels through a plurality of emission control lines based on an emission control start signal; and a timing controller configure to control an interval between a plurality of gate-on periods of the scan start signal within a gate-off period of the emission control start signal based on a dimming level.
    Type: Grant
    Filed: August 22, 2018
    Date of Patent: September 1, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae Hoon Kwon, Ji Hyun Ka, Jae Sic Lee, Seung Ji Cha
  • Patent number: 10755643
    Abstract: The present application provides a display device and a driving method thereof which can drive a driving transistor with lower power consumption when displaying an image. An organic EL display device applies voltage to switch on/off a driving transistor (M1) to a bottom gate electrode (2) of the driving transistor (M1) having a double gate structure, and applies a data voltage (Vdata) depending on data signals to a top gate electrode (6) as back gate voltage (Vbg). With this configuration, variation width of the voltage value can be smaller in comparison with a case to apply the data voltage to the bottom gate electrode (2).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: August 25, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Tokuo Yoshida
  • Patent number: 10755635
    Abstract: An organic light-emitting display device may include a first pixel, a first data line, a first scan line, a data driver, and a scan driver. The first pixel unit may include a sensing transistor and a scan transistor. The data driver may be electrically connected to the scan transistor through the first data line. The scan driver may be electrically connected to the scan transistor through the first scan line. The scan transistor may be turned on during a first period and a second period. The sensing transistor may be turned on during a third period between the first period and the second period. The first period, the second period, and the third period are included in one frame.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: August 25, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Su Min Yang, Cheol Min Kim, Dong Won Lee
  • Patent number: 10748488
    Abstract: A display device including: a display panel including a plurality of pixels configured to be driven in a normal mode or an always on display mode; an illuminance sensor configured to detect illuminance of ambient light; a direct current (DC)-DC converter configured to supply a power supply voltage having a first voltage level to the pixels through a power supply line when the illuminance is greater than a predetermined reference value in the always on display mode; and a display panel driver configured to supply a power supply voltage having a second voltage level to the pixels through the power supply line when the illuminance is less than or equal to the predetermined reference value in the always on display mode.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: August 18, 2020
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Hee Chul Lee
  • Patent number: 10741114
    Abstract: An electroluminescence display and a method of managing defective pixels thereon are provided. Defective pixels are detected from the pixels, based on sensing results on the electrical characteristics of a driving element, and defect candidates are selected from among the pixels within a compensation range in which the electrical characteristics of the driving element can be compensated by a compensation value obtained based on the sensing results on the electrical characteristics of the driving element.
    Type: Grant
    Filed: November 6, 2018
    Date of Patent: August 11, 2020
    Assignee: LG DISPLAY CO., LTD.
    Inventor: Geondo Park
  • Patent number: 10741119
    Abstract: Disclosed are a driving method and a driving system for reducing a residual image of AMOLED display. The driving method includes steps of: determining whether an image to be displayed is a static image; performing hierarchical segmentation on the static image if a determination result is yes; regulating an output brightness proportional coefficient of each pixel based on a hierarchical segmentation result; and outputting brightness of each pixel according to a corresponding output brightness proportional coefficient. The driving method can significantly reduce generation of a residual image when a static image is displayed.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: August 11, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yuchao Zeng, Tai Jiun Hwang
  • Patent number: 10713994
    Abstract: A display apparatus includes a display including a plurality of display modules, a display driver including a plurality of driving modules respectively connected to the plurality of display modules, a storage storing current information concerning a plurality of display modules, and a processor calculating a peak luminance level of each of a plurality of display modules based on individual power consumptions of each of a plurality of display modules and controlling a plurality of driving modules using the current information stored in the storage based on the calculated peak luminance level.
    Type: Grant
    Filed: September 9, 2019
    Date of Patent: July 14, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seong-phil Cho, Jin-mo Kang, Sang-young Park
  • Patent number: 10714010
    Abstract: Disclosed are a pixel compensation circuit, a method for driving the same, an organic light-emitting diode display panel, and a display device, and the pixel compensation circuit includes: a threshold compensation module, a storage module, a light-emission control module, a driver transistor, and a light-emitting diode, where the threshold compensation module is configured to provide a control electrode of the driver transistor with voltage of a data signal terminal, and threshold compensation voltage in a data writing stage; the storage module is configured to store the voltage of the control electrode of the driver transistor in the data writing stage and a light-emission stage; and the light-emission control module is configured to connect a second electrode of the driver transistor with the light-emitting diode in the light-emission stage to drive the light-emitting diode connected with the driver transistor to emit light.
    Type: Grant
    Filed: April 2, 2018
    Date of Patent: July 14, 2020
    Assignees: Beijing BOE Optoelectronics Technology Co., Ltd., BOE Technology Group Co., Ltd.
    Inventors: Ying Liu, Xin Wang, Xiaoping Zhang
  • Patent number: 10712611
    Abstract: A display device, a display apparatus and a display method are provided, the display device includes: a backlight source module; a display module; and a liquid crystal grating structure, arranged between the backlight source module and the display module.
    Type: Grant
    Filed: October 26, 2017
    Date of Patent: July 14, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Zhongxiao Li, Xiaochuan Chen, Wenqing Zhao, Qian Wang, Ming Yang, Chen Yu Chen
  • Patent number: 10706754
    Abstract: A local priority-based scanning scheme that focuses scanning to areas of a display panel whose measured characteristics are under continuous change (e.g., aging or relaxation). The algorithm identifies areas or regions needing compensation, using a current measurement from a single pixel in an area as a candidate to determine whether the rest of the region needs further compensation. The algorithm thus detects newly changed areas quickly, focusing time-consuming measurements on those areas that need high attention. Optionally, neighboring pixels sharing the same state (e.g., aging or overcompensated) as the measured pixel can be adjusted automatically given the likelihood that the neighboring pixels will also require compensation if the measured pixel needs compensation.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: July 7, 2020
    Assignee: Ignis Innovation Inc.
    Inventors: Javid Jaffari, Gholamreza Chaji, Abdorreza Heidari
  • Patent number: 10706780
    Abstract: The present disclosure provides a head-mounted display device including a first OLED display, a first temperature sensor, and a controller. The first OLED display is configured to display image data. The first temperature sensor is disposed within the head-mounted display device and is configured to sense the first device temperature of the first OLED display. The controller is electrically connected to the first OLED display and the first temperature sensor. The controller outputs the image data and a first display driving voltage to the first OLED display. The controller adjusts the first display driving voltage to control the brightness performance of the first OLED display according to the change of the first device temperature.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: July 7, 2020
    Assignee: ACER INCORPORATED
    Inventor: Jui-Lin Chen
  • Patent number: 10700136
    Abstract: A pixel structure and an organic light emitting display are disclosed. The pixel structure includes a plurality of pixels which includes a plurality of sub-pixels. At least one pixel forms a pixel unit, and longitudinally adjacent pixel units are arranged in a vertical mirror image, and/or laterally adjacent pixel units are arranged in a horizontal mirror image. The present disclosure may increase the area of mask opening during evaporation, reduce the difficulty of mask production process, and reduce the evaporation process difficulty by a reasonable pixel arrangement structure and allowing sub-pixels of adjacent pixels to share one mask opening to evaporate. It does not need to preset a gap during evaporating the sub-pixels of adjacent pixels of the mask, thereby a real high PPI is achieved while keeping the opening ratio. In addition, the present disclosure can further increase the strength of the mask.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: June 30, 2020
    Assignees: Kunshan New Flat Panel Display Technology Center Co., Ltd., Kunshan Go-Visionox Opto-Electronics Co., Ltd.
    Inventors: Yong Qiu, Zhouying Liu, Xiuqi Huang, Shenfu Zhang, Min Liu, Chao Chi Peng, Lin He, Hui Zhu, Hong Chen, Honglei Luo
  • Patent number: 10699624
    Abstract: A method and system for programming, calibrating and driving a light emitting device display, and for operating a display at a constant luminance even as some of the pixels in the display are degraded over time. The system may include extracting a time dependent parameter of a pixel for calibration. Each pixel in the display is configured to emit light when a voltage is supplied to the pixel's driving circuit, which causes a current to flow through a light emitting element. Degraded pixels are compensated by supplying their respective driving circuits with greater voltages. The display data is scaled by a compression factor less than one to reserve some voltage levels for compensating degraded pixels. As pixels become more degraded, and require additional compensation, the compression factor is decreased to reserve additional voltage levels for use in compensation.
    Type: Grant
    Filed: June 11, 2018
    Date of Patent: June 30, 2020
    Assignee: Ignis Innovation Inc.
    Inventors: Arokia Nathan, Gholamreza Chaji, Stefan Alexander, Peyman Servati, Richard I-Heng Huang, Corbin Church
  • Patent number: 10691240
    Abstract: A touch panel display includes a transparent resin substrate; a touch sensor embedded in the transparent resin substrate; pixels each including a first transistor and an organic electroluminescence element electrically connected with the first transistor; a display portion including an array of the pixels; and a shield electrode located between the touch sensor and the display portion. The pixels emitted light toward the transparent resin substrate.
    Type: Grant
    Filed: June 28, 2018
    Date of Patent: June 23, 2020
    Assignee: MIKUNI ELECTRON CORPORATION
    Inventor: Sakae Tanaka
  • Patent number: 10679555
    Abstract: The present disclosure provides a compensating circuit. The compensating circuit includes a feedback module, and a driving transistor with a first gate, a second gate, a first electrode, and a second electrode. A first terminal of the feedback module is connected to a first voltage source and a second terminal of the feedback module is connected to the first electrode and the second gate of the driving transistor; and the first gate of the driving transistor is connected to a data line, and the second electrode of the driving transistor for outputting a driving current.
    Type: Grant
    Filed: August 14, 2015
    Date of Patent: June 9, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Longyan Wang, Yongqian Li
  • Patent number: 10672337
    Abstract: An object of the disclosure is to achieve a stable display quality without an effect of variation in temperature in a display device including a display element driven by an electric current. The display device is provided with a thermistor as a temperature detector detecting an ambient temperature. A scanning signal amplitude controller changes the voltage level of a gate low voltage in accordance with temperature indicated by temperature data acquired by the thermistor. An in-panel driver controller gives, to a gate driver, a gate clock signal of which the voltage level on a high level side is set at the voltage level of a gate high voltage and the voltage level on a low level side is set at the voltage level of the gate low voltage. The gate driver outputs a scanning signal on the basis of the gate clock signal.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: June 2, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Shinya Tanaka, Taketoshi Nakano, Asahi Yamato
  • Patent number: 10672343
    Abstract: The present disclosure discloses a signal control apparatus and method, a display control apparatus and method, and a display apparatus. The display apparatus comprises M rows*N columns of pixel driving circuits arranged in an array, wherein the M pixel driving circuits of each column of pixel driving circuits are divided into k groups.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: June 2, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Kuo Sun, Tian Dong, Guoqiang Ma
  • Patent number: 10665156
    Abstract: The present disclosure provides a voltage compensation device, a method for voltage compensation and a display device. The voltage compensation device comprises a plurality of thermosensitive sensors, a processor and a power source management module. Each thermosensitive sensor corresponds to one or more pixel units of a display device and is disposed at a position corresponding to the one or more pixel units. For each thermosensitive sensor and one or more pixel units that corresponds to the thermosensitive sensor, the processor is configured to: determine an actual pixel voltage of the one or more pixel units; determine a compensated data signal; transmit the compensated data signal to the power source management module; and control the power source management module to output a compensated data voltage to the one or more pixel units, enabling the one or more pixel units to reach or approach the reference pixel voltage.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: May 26, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Chienpang Huang, Ling Shi, Li Wang
  • Patent number: 10665175
    Abstract: A display device includes: a first pixel region including first pixels, each of the first pixels including a driving transistor to be initialized by a first initialization power source supplied from a first power line; a second pixel region including second pixels, each of the second pixels including a driving transistor to be initialized by a second initialization power source supplied from a second power line; and a power supplier to supply the first initialization power source and the second initialization power source, the first initialization power source and the second initialization power source having a same voltage level when the display device is driven in a first mode, and the first initialization power source and the second initialization power source having different voltage levels during at least one frame period when the display device is driven in a second mode.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 26, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Tae Hoon Kim, Ji Hyun Ka, Hwan Soo Jang, Jin Tae Jeong, Min Woo Byun
  • Patent number: 10657894
    Abstract: Disclosed are a pixel circuit, a method for driving the same, a display panel, and a display device, and in the pixel circuit, a node reset sub-circuit resets a gate of a driver transistor in a first reset stage, a data writing sub-circuit writes a data signal, and compensates for drifting threshold voltage of the driver transistor, in a data writing stage, and a light-emission control sub-circuit connects a first voltage terminal with a light-emitting diode in a light emission stage.
    Type: Grant
    Filed: September 18, 2018
    Date of Patent: May 19, 2020
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Kuanjun Peng, Xiangxiang Zou, Chengchung Yang
  • Patent number: 10657885
    Abstract: A first storage capacitor is provided with respect to a data line. A pixel circuit includes a first transistor supplying current according to a voltage between a gate and a source, a light emitting element emitting light corresponding to current supplied by the first transistor, and a second transistor which is turned on or off between the data lines and the gate node. In a first period, an initial potential is supplied to the data line by turning on the second transistor, and in a second period, a data signal of a potential corresponding to a gradation level is supplied to the other end of the first storage capacitor by turning on the second transistor. After the second period, the second transistor is turned off.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: May 19, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Hitoshi Ota, Hideto Ishiguro
  • Patent number: 10650755
    Abstract: The present disclosure provides a pixel compensation circuit, a scan driving circuit and a display panel. The compensation circuit includes a first switch, its control terminal connecting to the first scanning signal, its first terminal connecting to the reference voltage, its second terminal connecting to the second terminal of the driving switch; a second switch, its control terminal connecting to the second scanning signal, its first terminal connecting to the data voltage, and its second terminal connecting to the control terminal of the driving switch and the second terminal of the first switch; a third switch, its control terminal connecting to the second scanning signal, its first terminal connecting to the voltage terminal, and its second terminal connecting to the first terminal of the driving switch, so as to eliminate the influence of the threshold voltage, improve panel display uniformity, brightness and luminous efficiency.
    Type: Grant
    Filed: November 23, 2017
    Date of Patent: May 12, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Guohui Liu
  • Patent number: 10650786
    Abstract: An automatically brightness adjusting electronic device and a brightness adjusting method are provided. The method comprises: sensing an environmental light intensity; generating a brightness adjustment signal according to the environmental light intensity via a second control unit; and adjusting a display brightness of a display unit according to the brightness adjustment signal via a first control unit or the second control unit.
    Type: Grant
    Filed: January 5, 2018
    Date of Patent: May 12, 2020
    Assignee: ASUSTEK COMPUTER INC.
    Inventors: Chin-Hung Lin, Wei-Chung Hung, Huai-Hao Syu, Tzu-Ping Lin, Chia-Po Chou, Tsung-Lin Wu, Han-Wei Tang, Yi-Ching Chen, Chih-Lung Lin, Ping-Fu Hsieh
  • Patent number: 10643537
    Abstract: An OLED display device capable of preventing luminance deviation caused by a voltage drop of an EVDD is disclosed. The OLED display device generates a reference voltage, a voltage level of which varies with distance from the data driver and supplies the reference voltage to the display panel through the data driver.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: May 5, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Yong-Chul Kwon, Jang-Hwan Kim, Dong-Won Park, Jong-Min Park, Joon-Hee Lee
  • Patent number: 10629119
    Abstract: A display apparatus has a pixel circuit including first, second, and third switches, a transistor, a light-emitting element, and a capacitor. A first terminal of the first switch is coupled to a first voltage line. A first terminal of the second switch is coupled to a second voltage line. A first terminal of the third switch is coupled to a data line. A first terminal of the transistor is coupled to a first power line. A second terminal of the light-emitting element is coupled to a second power line. A first terminal of the capacitor is coupled to a second terminal of the first switch, a second terminal of the third switch, and a control terminal of the transistor. A second terminal of the capacitor is coupled to a first terminal of the light-emitting element, a second terminal of the second switch, and a second terminal of the transistor.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: April 21, 2020
    Assignee: Innolux Corporation
    Inventor: Min-Hsin Lo
  • Patent number: 10629163
    Abstract: An image processing method, an image processing device, and a display device are provided. The image processing method includes: determining whether there is a pure-color pixel region in a to-be-displayed image; when there is the pure-color pixel region, performing pixel voltage compensation on pixels not arranged at the pure-color pixel region and arranged in columns identical to pixels at the pure-color pixel region in accordance with a predetermined condition, to output and display a compensated image; and when there is no pure-color pixel region, outputting the to-be-displayed image. The image processing device includes: a determination circuit determining whether there is a pure-color pixel region in a to-be-displayed image; and a compensation circuit performing pixel voltage compensation on pixels not arranged at the pure-color pixel region and arranged in columns identical to pixels at the pure-color pixel region in accordance with a predetermined condition, to output and display a compensated image.
    Type: Grant
    Filed: April 15, 2018
    Date of Patent: April 21, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Qing Yang
  • Patent number: 10621906
    Abstract: The present disclosure provides a display panel, a display device and a display method. The display panel includes a substrate and several pixel units formed on the substrate. The pixel unit includes a monochromatic electroluminescent component, which is disposed on the substrate; a rotating mechanism, which includes a bracket and a diaphragm set disposed on the bracket, the diaphragm set comprising diaphragms with at least two different colors; and a micro-electromechanical controller, which is connected to the bracket to control rotation of the bracket, so as to control an orthographic projection of the diaphragm on the substrate to at least partially overlap with an orthographic projection of the monochromatic electroluminescent component on the substrate, such that a light emitted by the monochromatic electroluminescent component permeates through the diaphragms of different colors, and emits a light corresponding to the colors of the diaphragms.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: April 14, 2020
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Pengxia Liang, Wei Wang, Xiaochuan Chen, Jifeng Tan, Xiandong Meng, Jian Gao, Xianqin Meng, Jing Yu
  • Patent number: 10614750
    Abstract: The present disclosure relates generally systems and methods for controlling current provided to display devices. A method for controlling the current may include receiving drive current values associated with subpixels in a display and receiving information that corresponds to an application type being rendered on the display and/or an indication of image data being rendered on the display. The method may then include reducing at least some of the drive current values based at least in part on the application type. Alternatively, the method may include reducing the at least a portion of the image data corresponding to the at least some of the drive current values has substantially similar luminance and color values. The method may then include supplying the subpixels with drive currents that correspond to the drive current values.
    Type: Grant
    Filed: January 8, 2019
    Date of Patent: April 7, 2020
    Assignee: Apple Inc.
    Inventor: Paul S. Drzaic
  • Patent number: 10614744
    Abstract: A display panel includes a display module including a plurality of pixels connected to gate lines and source lines and a driver module configured to apply driving voltages to the gate lines and the source lines. The driver module includes a driving voltage generator configured to generate the driving voltages and a calibration circuit configured to compare each of the driving voltages with a reference voltage and to output a calibration parameter according to a comparison result. The driving voltage generator calibrates each of the driving voltages using the calibration parameter.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: April 7, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jeehwal Kim, Kiho Kong, Youngmin Kim, Wangsuk Sung, Euihyuk Jeong
  • Patent number: 10607561
    Abstract: A voltage calibration method and a voltage system based on a timing controller are disclosed, wherein, the voltage calibration method comprises: the timing controller reads a voltage configuration value of a built-in non-volatile memory in a control chip; an analog-to-digital conversion chip acquires an output voltage of the control chip; the timing controller determines whether the output voltage is within a preset voltage range, and if not, updates the voltage configuration value in the built-in non-volatile memory until the output voltage is within the preset voltage range. The disclosure acquires the output voltage value of the control chip through the analog-digital conversion chip and automatically updates corresponding built-in non-volatile memories to automatically adjust the output voltage so as to ensure a stability of the output voltage and solve the problem of an output voltage drift.
    Type: Grant
    Filed: January 24, 2018
    Date of Patent: March 31, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Guangxing Xiao
  • Patent number: 10600365
    Abstract: A pixel and an organic light emitting diode (OLED) display using the pixel are disclosed. The pixel includes a driving transistor for transmitting a driving current, an OLED configured to receive a first portion of the driving current and a bypass transistor configured to receive a second portion of the driving current.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: March 24, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin-Tae Jeong, Won-Kyu Kwak
  • Patent number: 10566323
    Abstract: A scan driver has a plurality of stages configured to supply a scan signal to scan lines. The plurality of stages include a stage coupled to a scan line of the scan lines. The stage includes a first transistor including a gate electrode, a drain electrode and a source electrode and is configured to output the scan signal to the scan line; a second transistor provided on a side of the first transistor and connected to the drain electrode; a third transistor provided on the side of the first transistor and connected to the source electrode; a capacitor provided between the scan line and the first transistor; a first dummy transistor provided between the first transistor and the capacitor and connected to the capacitor; and a second dummy transistor provided between the first transistor and the second transistor and connected to both the first transistor and the second transistor.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: February 18, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jee Hoon Han, Won Jun Lee, Kyung Suk Jung, Yong Tae Cho, O Sung Seo, Yun Seok Lee
  • Patent number: 10559257
    Abstract: A pixel and an organic light emitting diode (OLED) display using the pixel are disclosed. The pixel includes a driving transistor for transmitting a driving current, an OLED configured to receive a first portion of the driving current and a bypass transistor configured to receive a second portion of the driving current.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: February 11, 2020
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin-Tae Jeong, Won-Kyu Kwak
  • Patent number: 10553157
    Abstract: An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: February 4, 2020
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Toya, Takehiko Kubota
  • Patent number: 10546550
    Abstract: The present disclosure provides a method and a device for driving a GOA circuit, a time controller and a display device. The method includes steps of: determining a bright-dark period for striped patterns on a display panel; and compensating for data signals at rows where the striped patterns are located periodically in accordance with the bright-dark period.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: January 28, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Zhihua Sun, Xu Zhang, Guohuo Su, Zhihao Zhang
  • Patent number: 10528842
    Abstract: An image processing method applied to an image processing system. The image processing method comprises: (a) computing an image intensity distribution of an input image; (b) performing atmospheric light estimation to the input image; (c) performing transmission estimation according to a result of the step (a) to the input image, to generate a transmission estimation parameter; and (d) recovering scene radiance of the input image according to a result generated by the step (b) and the transmission estimation parameter. At least one of the steps (a)-(c) are performed to data corresponding to only partial pixels of the input image.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: January 7, 2020
    Assignee: MEDIATEK INC.
    Inventors: Jian-Liang Lin, Yu-Wen Huang
  • Patent number: 10522609
    Abstract: A gate driver circuit, a display device, and a method of driving the display device are disclosed. The gate driver circuit includes a first transistor supplying a start signal to a Q node in response to a clock, a second transistor adjusting a gate voltage of the first transistor in response to the clock, a third transistor adjusting a gate voltage of the second transistor in response to the start signal, a fourth transistor changing a voltage of a QB node, a fifth transistor switching a current path between the first transistor and the Q node in response to a first line control signal, a sixth transistor supplying a gate-off voltage to an output node, a seventh transistor supplying a gate-on voltage to the output node, and an eighth transistor supplying a second line control signal to the QB node.
    Type: Grant
    Filed: July 17, 2018
    Date of Patent: December 31, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Youngbin Woo, Youngsun Jang
  • Patent number: 10510288
    Abstract: The present disclosure provides a dot correction method for a LED display device. The LED display device has a plurality of LED units arranged in an array. The method comprises providing driving currents to the plurality of LED units in columns or rows of the LED display device to make the LED units emit light; obtaining non-uniform brightness information corresponding to the LED units in columns or rows of the LED display device; and adjusting the driving current provided to each LED unit according to the non-uniform brightness information, in order to make the brightness of each LED unit be the same.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: December 17, 2019
    Assignee: SILICON TOUCH TECHNOLOGY INC.
    Inventors: Chi-Yuan Chin, Kuei-Jyun Chen
  • Patent number: 10497314
    Abstract: Disclosed are a driving method and a driving device for improving a contrast of an OLED image. The driving method includes steps of dividing an OLED display panel into a plurality of partitions, calculating an average pixel level of one frame of image to be displayed corresponding to each partition, determining, based on the average pixel level, a preset value of a discharge reference voltage, and regulating the discharge reference voltage applied to pixel driving circuits in the partition to the preset value. The driving method can significantly improve the contrast of the OLED image during display.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: December 3, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaolong Chen, Chih Hao Wu, Ming Jong Jou
  • Patent number: 10497300
    Abstract: A method for driving an active matrix organic light-emitting diode (AMOLED) display. The method may be used to digitally drive the AMOLED display in a way that limits the susceptibility of the AMOLED display to certain problems arising out of digital driving techniques, such as image sticking or low display lifetimes. The method involves generating compensation factors corresponding to each pixel of the display and using those compensation factors to control the illumination of the display. The aspects of the method that incorporate the operation point for generating a compensation factor may also be applied to analog driving of AMOLED displays.
    Type: Grant
    Filed: September 13, 2018
    Date of Patent: December 3, 2019
    Inventor: Chihao Xu
  • Patent number: 10490124
    Abstract: The present disclosure provides an AMOLED external electrical compensation detection method, in the display mode, estimating a cross-voltage between the drain and the source of the detecting TFT, calculating a gate-source voltage of the driving TFT based on the estimated value, it is possible to improve the writing precision of the gate-source voltage of the driving TFT; in the detection mode, estimating a cross-voltage between the drain and the source of the detecting TFT, calculating a source voltage of the driving TFT based on the estimated value, calculating the threshold voltage and the carrier mobility of the driving TFT based on the calculated voltage of the source of the driving TFT, it is possible to reduce the calculation error between the threshold voltage and the carrier mobility of the driving TFT and improve the accuracy of the external electrical compensation detection of the AMOLED.
    Type: Grant
    Filed: November 25, 2017
    Date of Patent: November 26, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Hongjun Xie
  • Patent number: 10490134
    Abstract: The present invention relates to an area-efficient apparatus and method for sensing a signal using overlap sampling time. In a preferred embodiment of the present invention, the sensing apparatus sensing a signal which detects degradation of a light-emitting device and transferring the signal to a compensating circuit comprises: M switching portions connected to sensing lines included in each group of M groups into which N sensing lines are divided, where N>M and N and M are natural numbers. The switching portion is characterized by alternatively connecting any one of N/M sensing lines to a sample-and-hold portion.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: November 26, 2019
    Assignee: DB HiTek, Co., Ltd.
    Inventor: Tae-Ho Hwang
  • Patent number: 10490127
    Abstract: An organic light emitting display device includes one or more pixels connected to scan lines, feedback lines, and data lines, and including driving transistors configured to control an amount of current supplied to organic light emitting diodes, a sensor configured to generate compensation data based on sensing data including deviation information of a driving transistor of the driving transistors and first reference data for a sensing period, a data driver configured to supply a first reference data signal to the data line based on second reference data for the sensing period, and a scan driver configured to supply a scan signal to the scan line, wherein the sensor is configured to generate the compensation data while changing a bit value of the second reference data two or more times during the sensing period.
    Type: Grant
    Filed: July 7, 2017
    Date of Patent: November 26, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Wook Lee, Sung Hwan Kim, Jeong Hwan Shin
  • Patent number: 10490164
    Abstract: The present disclosure is directed to systems and methods of forming an expandable display device capable of maintaining a fixed pixel density at any display area from a relatively smaller first display area to a relatively larger second display area. The expandable display device includes an upper display layer and a lower display layer. In a first display position, the display elements having a defined pixel density included in the upper display layer obscure the display elements included in the lower display layer. The upper display layer and lower display layers are disposed on expandable substrates capable of continuous displacement between the first and second display positions. In the second display position, the display elements included in the lower display layer are visible through gaps between the display elements included in the upper display layer. The resultant display provides a uniform pixel density at all displacements between the first and second display positions.
    Type: Grant
    Filed: October 10, 2018
    Date of Patent: November 26, 2019
    Assignee: INTEL CORPORATION
    Inventor: Chwee Lin Choong
  • Patent number: 10475698
    Abstract: Disclosed are an ambipolar transistor and a high-sensitivity electronic sensor using the same. The ambipolar transistor includes: a substrate; a gate formed on the substrate; a gate insulating film formed of an SiOC thin film and disposed on the substrate and the gate; and a source portion and a drain portion formed on the gate insulating film and spaced apart from each other, wherein the source portion and the drain portion comprise: a main source terminal and a main drain terminal disposed on the gate insulating film at right and left sides of the gate, respectively; and a plurality of source sub-terminals and a plurality of drain sub-terminals alternately arranged between the main source terminal and the main drain terminal, respectively.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: November 12, 2019
    Inventor: Teresa Oh
  • Patent number: 10467940
    Abstract: A sensing apparatus that senses electrical signals of a plurality of pixels arranged in rows or columns. The sensing apparatus includes a plurality of sensing circuits configured to sense electrical signals through sensing lines that correspond to the columns of the pixels, a first switch configured to connect a first sensing line of the sensing lines that corresponds to a first pixel column of the columns of the pixels and a first sensing circuit of the sensing circuits that corresponds to the first pixel column; and a second switch configured to connect the first sensing line and a second sensing circuit of the sensing circuits different from the first sensing circuit.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: November 5, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Choongsun Shin, Ohjo Kwon