Brightness Or Intensity Control Patents (Class 345/77)
  • Patent number: 10354594
    Abstract: An organic light emitting display device may include a display panel, a power supply, and a display driver. The display panel may comprise a plurality of scan lines, a plurality of data lines, and a plurality of pixels connected to the scan lines and to the data lines. The power supply may supply a first pixel voltage and a second pixel voltage to the pixels. The display driver may control the display panel. The display panel may display a first image in a first frame frequency during a first driving mode, and display a second image in a second frame frequency that is lower than the first frame frequency during a second driving mode, according to a control by the display driver.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: July 16, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Jin Jeon
  • Patent number: 10347211
    Abstract: A display driving system includes a display driver integrated circuit, and the display driver integrated circuit includes a brightness calculating circuit, an image complexity calculating circuit, a weight calculating circuit and a look up table. The brightness calculating circuit calculates brightness of image data and generates brightness data. The image complexity calculating circuit calculates image complexity and generates weight data, based on a pattern of the image data. The weight calculating circuit receives brightness data and a weight data to generate brightness correction data.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: July 9, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Sang-Min Lee
  • Patent number: 10319342
    Abstract: The present disclosure relates to methods and devices for adjusting display brightness. A method may include determining original gray scale values of pixels of a display. The method may further include performing gray scale transformation on the original gray scale values of the pixels of the display to determine transformed gray scale values. The method may further include adjusting gray scale values of the pixels of the display to the transformed gray scale values.
    Type: Grant
    Filed: December 29, 2016
    Date of Patent: June 11, 2019
    Assignee: XIAOMI INC.
    Inventors: Guosheng Li, Anyu Liu, Hui Du
  • Patent number: 10311799
    Abstract: A display device according to example embodiments includes an image analyzer configured to calculate contrast and load of an image of a frame based on R, G, and B image data input corresponding to the frame, an image processor configured to control a peak control coefficient applied to W image data to adaptively control peak luminance based on the contrast and the load, and to respectively generate R?, G?, and B? image data by subtracting a product of the W image data and the peak control coefficient from each of the R, G, and B image data, a display panel including a plurality of pixels, a data driver configured to generate a data signal based on the R?, G?, B, and W image data, and to provide the data signal to the display panel, and a scan driver configured to provide a scan signal to the display panel.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: June 4, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Ho Park, Jin-Ho Lee
  • Patent number: 10311798
    Abstract: An organic light emitting diode display includes pixels in which an amount of current flowing in an organic light emitting diode of each pixel is determined depending on a difference between a data voltage and a reference voltage, a control signal generator differently generating a screen brightness control signal depending on a driving mode, a register adjusting unit independently adjusting a reference voltage register value and a gamma register value at each of red (R), green (G), and blue (B) pixels depending on the screen brightness control signal, a reference voltage generator generating the reference voltage of each of the R, G, and B colors based on the reference voltage register value, and a data voltage generator generating the data voltage of each of the R, G, and B colors based on the gamma register value.
    Type: Grant
    Filed: December 18, 2015
    Date of Patent: June 4, 2019
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Hyunjae Lee, Taeyoung Park, Dongsup Shim
  • Patent number: 10304379
    Abstract: A display device includes: a display unit which includes a plurality of pixels each including an organic EL element; and a control unit which adjust a value of a luminance signal to be supplied to a target pixel to be corrected, such that an actual luminance of the target pixel is equal to a reference luminance, the reference luminance being an actual luminance of a reference pixel obtained when the luminance signal to be supplied to the target pixel is supplied to the reference pixel. The reference pixel has predetermined attenuation characteristics for light emission amount.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: May 28, 2019
    Assignee: JOLED, INC.
    Inventors: Masafumi Matsui, Eiji Iwauchi, Tomoyuki Maeda
  • Patent number: 10304391
    Abstract: An active matrix organic light-emitting diode (AMOLED) display device and a controlling method thereof. The AMOLED display device (100) comprises a system power IC (110), a driver IC (120), an AMOLED panel (130), a power line (111) and a feedback line (112). The AMOLED panel (130) includes a plurality of pixel circuits. The system power IC (110) outputs a positive power supply voltage (ELVdd1) to the plurality of pixel circuits via the power line (111), and the driver IC (120) detects a positive power supply voltage (ELVdd2) actually applied to the plurality of pixel circuits via the feedback line (112) and compensates for data voltages (Vdata) based on the positive power supply voltage (ELVdd2) actually applied to plurality of pixel circuits.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: May 28, 2019
    Assignee: KUNSHAN GO-VISIONOX OPTO-ELECTRONICS CO., LTD.
    Inventors: Mingwei Ge, Shingo Kawashima
  • Patent number: 10290258
    Abstract: An organic light emitting display device includes a data driver, a pixel unit, a timing controller, and a power generator. The data driver generates data signals to be supplied to data lines based on gamma voltages. The pixel unit controls the amount of current flowing from a first power supply to a second power supply in each of a plurality of pixels based on the data signals and a reference power voltage. The timing controller limits the maximum brightness of the pixel unit corresponding to a plurality of dimming levels. The first power generator changes the voltage of the first power supply corresponding to the dimming levels.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: May 14, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sang Hun Park, Dong Wan Park, Jae Won Kim, Sang Jin Pak
  • Patent number: 10290260
    Abstract: A pixel circuit, a display panel and a driving method. The pixel circuit includes a first light-emitting circuit, a first drive circuit, a first compensating circuit, a first data write circuit, a first reset circuit, a first storage circuit, a first initializing circuit, a first light-emitting control circuit, a second light-emitting circuit, a second drive circuit, a second compensating circuit, a second data write circuit, a second reset circuit, a second storage circuit, a second initializing circuit, a second light-emitting control circuit, a third light-emitting circuit, a third light-emitting control circuit, a third drive circuit, and a third initializing circuit.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: May 14, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yuan Wu, Jun Nie, Zheng Wang
  • Patent number: 10285229
    Abstract: An apparatus can include: a bleeder circuit coupled to a DC bus of an LED driving circuit having an SCR dimmer; the bleeder circuit being configured to stabilize a voltage of the DC bus at a predetermined value by drawing a bleed current through a bleed path in a first mode, and to cut off the bleed path in a second mode; and a controller configured to control the bleeder circuit to be in the first mode before the SCR dimmer is turned on, and to switch to the second mode after the SCR dimmer is turned on, where the predetermined value is greater than zero.
    Type: Grant
    Filed: March 26, 2018
    Date of Patent: May 7, 2019
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventors: Jianxin Wang, Huiqiang Chen
  • Patent number: 10262585
    Abstract: An organic light-emitting display apparatus includes an organic light-emitting diode, a driving transistor arranged to receive a first driving voltage and to supply a driving current to the organic light-emitting diode, a data line arranged to transfer a sustain voltage and a data voltage, a sensing transistor which is connected to the data line, and which is arranged to transfer the sustain voltage to an anode of the organic light-emitting diode in response to a sensing control signal, a switching transistor which is connected to the data line, and which is arranged to transfer the data voltage to the driving transistor in response to a scan signal, and a data compensation unit arranged to compensate image data according to characteristic information of the organic light-emitting diode, the characteristic information transmitted to the data compensation unit through the sensing transistor and the data line.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: April 16, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Takahiro Senda, Kyunghoon Chung
  • Patent number: 10255850
    Abstract: A pixel includes: a first transistor connected between a data line and a first node; a second transistor connected between a first power source and a second node, the second transistor including a gate electrode connected to the first node; a third transistor connected between the first power source and the second transistor; a capacitor connected between the first node and the second node; an organic light emitting diode (OLED) connected between the second node and a second power source; and a fourth transistor including a second electrode connected to a cathode of the OLED.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: April 9, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Young Jin Cho, Young In Hwang, Yong Jae Kim, Deok Young Choi
  • Patent number: 10223977
    Abstract: A circuit configured to sense a threshold voltage of an organic light emitting diode (OLED) of a display panel includes a sample and hold unit configured to receive the threshold voltage of the OLED, a first capacitor configured to sample the threshold voltage of the OLED, a second capacitor configured to charge-share the voltage on the first capacitor, an output terminal configured to output the voltage on the second capacitor, and an amplifier including an input terminal connected to the output terminal of the sample and hold unit. The sample and hold unit includes a first switching unit configured to selectively connect the OLED, the first capacitor, the second capacitor, the first capacitor and a first or second reference voltage, the second capacitor and the second or a third reference voltage, and the second capacitor and the output terminal.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: March 5, 2019
    Assignee: DB HiTek Co., Ltd.
    Inventor: Tae Ho Hwang
  • Patent number: 10210802
    Abstract: The invention provides a driver circuit for OLED display panel, which comprises: a plurality of control signal output units (10), and a plurality of pixel light-emitting driver units (20) arranged in an array form, the plurality of control signal output units (10) respectively receiving a feedback control signal reflecting the ageing information of the OLED in a different active area of the OLED display panel, and each control signal output unit (10) correspondingly outputting an adjustable light-emitting control signal to at least a pixel light-emitting driver unit (20) according to the received feedback control signal to adjust the light emission time of the corresponding pixel light-emitting driver unit in a frame cycle so as to compensate the reduced luminance caused by aged OLED and improve the uneven luminance problem of OLED display panel.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: February 19, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Hao Li
  • Patent number: 10210808
    Abstract: A luminance controller according to example embodiments includes a gamma set selector to select a reference gamma set from among first through N-th gamma sets respectively corresponding to first through N-th reference luminances, based on a target luminance of a display panel; an initialization voltage selector to select an initialization voltage corresponding to the reference gamma set, from among first through N-th initialization voltage offsets respectively corresponding to the first through N-th gamma sets; a common voltage selector to select a common voltage corresponding to the reference gamma set from among first through N-th common voltage offsets respectively corresponding to the first through N-th gamma sets; and a determiner to determine a target initialization voltage based on the target luminance and the initialization voltage, and to determine a target common voltage based on the target luminance and the common voltage.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: February 19, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Yeon-Shil Jung, Young-Seob Kim, Ji-Yun Son, Eun-Jung Oh, Deok-Jun Choi
  • Patent number: 10204565
    Abstract: Disclosed are an organic light emitting display panel, an organic light emitting display device, and a method of driving the organic light emitting display device. The organic light emitting display panel, the organic light emitting display device, and the method of driving the organic light emitting display device having a subpixel structure and a gate line connection structure in which two types of scan transistors within each subpixel can be individually turned on and off and image driving and various types of sensing driving can be performed while the aperture ratio increases through the individual on and off of the scan transistors.
    Type: Grant
    Filed: December 23, 2016
    Date of Patent: February 12, 2019
    Assignee: LG Display Co., Ltd.
    Inventors: Yong Kyu Park, Seokyu Jang, Chang Bok Lee
  • Patent number: 10204974
    Abstract: The present disclosure relates to a pixel circuit, a display substrate, a display device, and a method for driving the display substrate. The pixel circuit includes an offset control unit, which is connected between a reset control terminal and a first end of an electroluminescent unit and is configured to be turned on in a case that a reset control signal is applied to the reset control terminal, and to set a voltage of the first end of the electroluminescent unit to be a voltage of the reset control signal.
    Type: Grant
    Filed: August 10, 2016
    Date of Patent: February 12, 2019
    Inventors: Qiang Wang, Libin Liu
  • Patent number: 10198984
    Abstract: A system calibrates luminance of an electronic display panel. The system includes a luminance detection device, an actuator and a computing device. The luminance detection device comprises a plurality of detectors arranged along a width or length of the electronic display panel to simultaneously measure luminance parameters of at least one row or column of areas in the electronic display panel. Each of the plurality of detectors covers an area in the at least one row or column of the electronic display panel. The actuator is configured to cause a relative translational movement in a length direction or a width direction of the electronic display panel. The computing device is coupled to the luminance detection device to receive the measured luminance parameters, and the computing device is configured to generate calibration data for adjusting brightness of areas of the electronic display panel by processing the measured luminance parameters.
    Type: Grant
    Filed: March 31, 2017
    Date of Patent: February 5, 2019
    Assignee: Facebook Technologise, LLC
    Inventors: Kieran Tobias Levin, Simon Hallam, Ye Yin, Evan M. Richards, Shizhe Shen
  • Patent number: 10198994
    Abstract: An organic light emitting diode (OLED) display device includes a display panel including a pixel that includes a driving transistor and a light emitting diode; a timing control circuit including a compensation value calculation portion that calculates a compensation value (?) of the light emitting diode using a first correlation equation having a threshold voltage change quantity (?Vth) of the driving transistor as a variable, and a data compensation portion that applies the calculated compensation value to an input image data to produce a compensation data; and a data driver receiving the compensation data and supplying the compensation data to the pixel, wherein the first correlation equation is ?=a*?Vth+b, where a is a first gradient constant, and b is a first intersect constant.
    Type: Grant
    Filed: December 27, 2016
    Date of Patent: February 5, 2019
    Assignee: LG Display Co., Ltd.
    Inventor: Jin-Sol Choi
  • Patent number: 10192488
    Abstract: An OLED pixel driving circuit includes a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor, a sixth thin film transistor, a capacitor and an OLED. A gate of the third thin film transistor receives a second scan signal, both a source of the third thin film transistor and a source of the fourth thin film transistor receive a data voltage or an initial voltage. A gate of the first thin film transistor is connected to a source of the second thin film transistor and one terminal of the capacitor, another terminal of the capacitor being grounded.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: January 29, 2019
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO., LTD.
    Inventor: Xiaolong Chen
  • Patent number: 10186195
    Abstract: There are provided an organic light emitting display device capable of enhancing display quality. The organic light emitting display device includes a compensation unit configured to extract current information of an organic light emitting diode (OLED) of a pixel, and configured to determine a brightness compensation amount corresponding to the extracted current information, and a timing controller configured to generate second data by changing bits of externally supplied first data according to the brightness compensation amount, wherein the compensation unit is configured to obtain the brightness compensation amount using a current variation corresponding to a degradation of the OLED, and using a linear function corresponding to the current variation.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: January 22, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jin Wook Yang, Young Wook Yoo
  • Patent number: 10170043
    Abstract: The application provides a display driving circuit, an array substrate, a circuit driving method, and a display device. The array substrate comprises a plurality of rows of scan lines, a plurality of columns of data lines, and a plurality of pixel units being defined by intersecting of the plurality of rows of scan lines and the plurality of columns of data lines; each column of data lines being connected to a reset module; each column of data lines being further connected to a current control module configured to form a first current flowing from a data line connected thereto to a reference voltage line, wherein the pixel unit includes a first transistor and a second transistor, the first transistor and the second transistor have device parameters that are the same or in a predetermined proportion, and a second electrode of the second transistor is connected to the output terminal.
    Type: Grant
    Filed: July 4, 2016
    Date of Patent: January 1, 2019
    Assignee: BOE Technology Group Co., Ltd.
    Inventors: Xinshe Yin, Tuo Sun
  • Patent number: 10140923
    Abstract: The present application provides a pixel driving system of AMOLED and a pixel driving method of AMOLED. The pixel driving system of AMOLED includes a pixel driving circuit of a 4T1C architecture, and an initialization voltage supply module electrically connected to the pixel driving circuit, by providing a high level of an initialization signal from the initialization voltage supply module at the light emission stage in the pixel driving circuit to effectively compensate the threshold voltage of the driving thin film transistor, so that the current flowing through the organic light emitting diode is stabilized while reducing the leakage current of the gate and the source of the driving thin film transistor in the light emission stage, the stability of the compensation data in the light emission stage, to enhance the compensation effect.
    Type: Grant
    Filed: February 16, 2017
    Date of Patent: November 27, 2018
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Limin Wang
  • Patent number: 10121413
    Abstract: A flash phenomenon of OLEDs at the time of power source ON of a display device is suppressed. The OLED emits light when reference potentials VSS and VDD are applied from power source lines to the OLED's cathode and anode respectively. While the anode can be connected to one of the power source line via a driving TFT and a lighting switch, a reset potential VRS can be applied to the anode via a reset switch and the driving TFT. The lighting switch is turned OFF and the reset switch and the driving TFT are turned ON so that VRS is applied to the anode, before starting the application of the reference potentials to the power source lines. Following this state, the application of the reference potentials to the power source lines starts, and thus a normal operation of allowing the OLED to emit light starts.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: November 6, 2018
    Assignee: Japan Display Inc.
    Inventors: Tetsuo Morita, Hiroyuki Kimura, Makoto Shibusawa, Hiroshi Nakayama, Hiroshi Tabatake, Yutaka Umeda
  • Patent number: 10109239
    Abstract: A gate driving circuit including a plurality of stages to respectively output a plurality of scan signals, an N-th stage of the stages includes: a shift register to output an N-th scan signal based on an (N?1)-th scan signal; and a sensing signal output block connected to the shift register and to output an (N?1)-th sensing signal for compensation of a pixel based on a sensing control signal and a data control signal, where N is an integer greater than 1.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: October 23, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hai-Jung In
  • Patent number: 10096299
    Abstract: An adaptive learning algorithm uses a light sensor and a content analyzer to generate boost curves of low-end pixel values to boost the brightness of display content. The adaptive learning algorithm considers the user's manual input to learn the user's preferred boost curves for given conditions. The boost curves are used to digitally boost the gain of the low-end pixels to have higher brightness to improve the visibility of dark display content.
    Type: Grant
    Filed: October 10, 2016
    Date of Patent: October 9, 2018
    Assignee: Dell Products L.P.
    Inventor: Dengzhai Xiong
  • Patent number: 10089928
    Abstract: The sensing method for an organic light-emitting display comprises: defining a pixel group comprising a reference pixel and two or more valid pixels, among a plurality of pixels arranged on a horizontal line; obtaining a black level current sensing value by applying a black level data voltage to the reference pixel; obtaining a current sensing value for a given gray level by applying a data voltage for the given gray level higher than the black level to each of the valid pixels; and obtaining a pixel current sensing value by subtracting the black level current sensing value from the current sensing value for the given gray level to eliminate common noise.
    Type: Grant
    Filed: July 20, 2017
    Date of Patent: October 2, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: Jaeik Yoo, Myunggi Lim, Osung Do
  • Patent number: 10078983
    Abstract: The present disclosure provides a display device including a display panel and a scan driver. The display panel displays an image. The scan driver includes a scan signal generation circuit disposed on one side of the display panel, and an emission signal generation circuit disposed on the other side of the display panel. The emission signal generation circuit outputs an emission signal having at least two Logic High sections in response to an external clock signal and first and second scan signals output from the scan signal generation circuit.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: September 18, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: Jungmin Lee, Junho Bong
  • Patent number: 10068956
    Abstract: An organic light emitting display can include a substrate, a first capacitor formed on the substrate, the first capacitor including a first capacitor lower electrode, a first capacitor upper electrode, and a gate insulating layer between the first capacitor lower upper electrodes, a first passivation layer over the first capacitor, a second capacitor on the first passivation layer, the second capacitor including a second capacitor lower electrode, a second capacitor upper electrode, and a second passivation layer interposed between the second capacitor lower upper electrodes, an organic insulating layer over the second capacitor, a pixel electrode on the organic insulating layer, an organic layer on the pixel electrode, the organic layer including at least a light emitting layer, and an opposite electrode on the organic layer, and the width of the second capacitor lower electrode is greater than that of the second capacitor upper electrode.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: September 4, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventor: Jinwoo Park
  • Patent number: 10062327
    Abstract: The present exemplary embodiments relate to measurement of a characteristic of a driving transistor and sensing driving therefor. Provided are a data driver, an organic light emitting display panel, an organic light emitting display device, and a driving method thereof which are capable of measuring characteristics of a driving transistor even at a data voltage which is not so high within a short sensing time by simultaneously sensing the characteristics of the driving transistors for two or more sub pixels, among a plurality of sub pixels commonly connected to the sensing lines, while measuring characteristics (for example, a threshold voltage or a mobility) of the driving transistor.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: August 28, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Ryosuke Tani, KyungHyun Choi, ChangHoon Han
  • Patent number: 10049614
    Abstract: An OLED degradation compensation system includes a display system having an OLED display device. A computing device is coupled to the display system and includes an OLED display device adjustment database storing an OLED table that is associated with a usage time of the OLED display device and that includes OLED compensation information that is based upon the usage time. An OLED display device use tracking engine in the computing system determines usage data for the OLED display device. An OLED display device adjustment engine in the computing system retrieves the usage data determined by the OLED display device use tracking engine, uses the usage data to select the OLED table in response to the usage data corresponding to the usage time associated with the OLED table, and causes at least one OLED in the OLED display device to be powered using the OLED compensation information in the OLED table.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: August 14, 2018
    Assignee: Dell Products L.P.
    Inventors: Stefan Peana, Jace Files, Kenneth W. Stufflebeam, Jr.
  • Patent number: 10043448
    Abstract: Raw grayscale image data, representing images to be displayed in successive frames, is used to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second-frames, and supplying each pixel with a drive current that is higher in the first sub-frame than in the second sub-frame for raw grayscale values in a first preselected range, and higher in the second sub-frame than in the first sub-frame for raw grayscale values in a second preselected range. The display may be an active matrix display, such as an AMOLED display.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: August 7, 2018
    Assignee: Ignis Innovation Inc.
    Inventors: Kongning Li, Vasudha Gupta, Gholamreza Chaji, Arokia Nathan
  • Patent number: 10013917
    Abstract: A panel driving device includes a voltage generator and a data driver. The voltage generator generates a compensation voltage set and a gamma voltage set and selectively outputs the compensation voltage set or the gamma voltage set. The data driver outputs a reference voltage based on the compensation voltage set and outputs pixel data voltage based on the gamma voltage set.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: July 3, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jong-Soo Kim, Myoung-Seop Song, Dong-Wan Park, Sang-Hun Park
  • Patent number: 10013916
    Abstract: To prevent image retention, the pixel circuit includes: a light emitting element; a driving transistor which supplies an electric current according to an applied voltage to the light emitting element; a capacitor part which holds the voltage containing a threshold voltage and a data voltage of the driving transistor; and a switch part which has the voltage containing the threshold voltage and the data voltage held to the capacitor part and applies the voltage to the driving transistor. Further, the switch part has a function which applies a constant voltage to the driving transistor before having the voltage containing the threshold voltage and the data voltage held to the capacitor part.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: July 3, 2018
    Assignee: NLT TECHNOLOGIES, LTD.
    Inventors: Yoshihiro Nonaka, Yojiro Matsueda, Kenichi Takatori
  • Patent number: 9990882
    Abstract: A system uses image data, representing images to be displayed in successive frames, to drive a display having pixels that include a drive transistor and an organic light emitting device by dividing each frame into at least first and second sub-frames, supplying the image data during one of the sub-frames, supplying compensation data during the other of the sub-frames, compensating image data based on the compensation data, and supplying each pixel with a drive current that is based on the compensated image data during each frame. The compensated image data may be supplied from a driver having a preselected data resolution, and the system determines whether the compensated image data is greater than the data resolution of the driver, and if the compensated image data is greater than the data resolution of the driver, transfers the excess compensated image data to a different sub-frame.
    Type: Grant
    Filed: July 26, 2016
    Date of Patent: June 5, 2018
    Assignee: Ignis Innovation Inc.
    Inventors: Gholamreza Chaji, Nino Zahirovic
  • Patent number: 9984607
    Abstract: Circuits for programming, monitoring, and driving pixels in a display are provided. Circuits generally include a driving transistor to drive current through a light emitting device according to programming information which is stored on a storage device, such as a capacitor. One or more switching transistors are generally included to select the circuits for programming, monitoring, and/or emission. Circuits advantageously incorporate emission transistors to selectively couple the gate and source terminals of a driving transistor to allow programming information to be applied to the driving transistor independently of a resistance of a switching transistor.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: May 29, 2018
    Assignee: Ignis Innovation Inc.
    Inventor: Gholamreza Chaji
  • Patent number: 9978309
    Abstract: To prevent image retention, the pixel circuit includes: a light emitting element; a driving transistor which supplies an electric current according to an applied voltage to the light emitting element; a capacitor part which holds the voltage containing a threshold voltage and a data voltage of the driving transistor; and a switch part which has the voltage containing the threshold voltage and the data voltage held to the capacitor part and applies the voltage to the driving transistor. Further, the switch part has a function which applies a constant voltage to the driving transistor before having the voltage containing the threshold voltage and the data voltage held to the capacitor part.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: May 22, 2018
    Assignee: NLT TECHNOLOGIES, LTD.
    Inventors: Yoshihiro Nonaka, Yojiro Matsueda, Kenichi Takatori
  • Patent number: 9959798
    Abstract: A display panel driving apparatus includes a data processing circuit, a data driver, and a gate driver. The data processing circuit increases a first gamma value of input image data of which the gamma value is 0, according to a second gamma value of the input image data of which the second gamma value is not 0. The data driving part outputs a data signal based on the output image data to a data line. The gate driving part outputs a gate signal to a gate line.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: May 1, 2018
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Yoon-Gu Kim, Bong-Im Park, Ik-Hyun Ahn, Hyun-sik Hwang, Woo-Joo Lee, Jin-Young Lee
  • Patent number: 9952736
    Abstract: An OLED array substrate is provided. The OLED array includes multiple sub-pixels defined by multiple data lines and multiple scan lines, and a resistance-type pressure sensing element located in non-opening regions of the sub-pixels. The pressure sensing element includes multiple resistors. Each resistor has a serpentine wire structure. The serpentine wire structure includes a first sub-wire and a second sub-wire connected to two adjacent first sub-wires. Both the first sub-wire and the second sub-wire are located in non-opening regions of the sub-pixels on the OLED array substrate. The resistance-type pressure sensing element is arranged in a display region of the OLED array substrate without influencing the display effect of a display panel or a display device. An extension direction of a projection of the first sub-wire on an array substrate intersects with extension directions of projections of the data lines and the scan lines on the array substrate.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: April 24, 2018
    Assignees: SHANGHAI TIANMA MICRO-ELECTRONICS CO., LTD., TIANMA MICRO-ELECTRONICS CO., LTD.
    Inventors: Yang Zeng, Xingyao Zhou, Lihua Wang, Liang Liu
  • Patent number: 9953567
    Abstract: Provided is an organic light-emitting display device including: a first pixel; a second pixel; and a common capacitor connected to the first and second pixels, wherein the first pixel comprises: a first switching transistor transmitting a first data signal in response to a first scan signal; a second switching transistor transmitting the first data signal to the common capacitor; a first storage capacitor storing a charge corresponding to the first data signal; a first driving transistor generating a driving current corresponding to the charge stored in the first storage capacitor; and a first organic light-emitting diode (OLED) emitting light corresponding to the first driving current, and wherein the second pixel comprises: a third switching transistor transmitting a second data signal in response to a second scan signal; a fourth switching transistor transmitting the second data signal to the common capacitor; a second storage capacitor storing a charge corresponding to the second data signal; a second dri
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: April 24, 2018
    Assignee: Samsung Display Co., Ltd
    Inventor: Insoo Wang
  • Patent number: 9934720
    Abstract: A voltage compensation pixel circuit includes a driving transistor coupled to the light emitting element between a high potential power line and a low potential power line to drive the light emitting element in response to a predetermined voltage applied to a gate, switching transistor including a first switching transistor being switched in response to a voltage of a first gate signal, a second switching transistor and a third switching transistor being switched in response to a voltage of a third gate signal, and a fourth switching transistor being switched in response to a voltage of a second gate signal, a storage capacitor coupled between a first node and a second node, and a setup transistor coupled between the light emitting element and the driving transistor and operated by the driving transistor. The first node is coupled to the driving transistor. The second node is coupled between the second switching transistor and the fourth switching transistor.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: April 3, 2018
    Assignee: FOUNDATION OF SOONGSIL UNIVERSITY-INDUSTRY COOPERATION
    Inventors: Hojin Lee, Yongchan Kim, Yeonkyung Kim
  • Patent number: 9911382
    Abstract: The present disclosure provides a display array substrate, a compensation method, a display panel and a display device. The display array substrate includes at least one power line and a voltage application unit. The at least one power line is connected to pixels in at least one column within an effective display region on the display array substrate. The power application unit is arranged outside the effective display region and configured to apply power supply voltages to at least two power supply voltage input points on the at least one power line. An absolute value of a voltage difference between the at least two power supply voltage input points is less than a predetermined voltage threshold.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: March 6, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Xinshe Yin, Ying Wang, Guang Li
  • Patent number: 9907130
    Abstract: Disclosed are LED driver circuits, and methods of driving LED loads. In one embodiment, an LED driver can include: (i) an SCR coupled to an AC power supply, and configured to generate a DC voltage through a first rectifier circuit; (ii) a first stage conversion circuit having an isolated topology with power factor correction, where the first stage conversion circuit is configured to convert the DC voltage to a first output voltage; (iii) where the first stage conversion circuit includes a transformer having a primary side coupled to the DC voltage, and a secondary side coupled to the first output voltage through a second rectifier circuit; and (iv) a second stage conversion circuit having a non-isolated topology, where the second stage conversion circuit is configured to convert the first output voltage to an output current configured to drive an LED load based on a conducting angle of the SCR.
    Type: Grant
    Filed: October 2, 2015
    Date of Patent: February 27, 2018
    Assignee: Silergy Semiconductor Technology (Hangzhou) LTD
    Inventor: Wei Chen
  • Patent number: 9892673
    Abstract: A display substrate, display device and driving method thereof. While providing an increased resolution, the display device also has an increased aperture ratio. The display substrate comprises a plurality of pixel units (10) arranged in a matrix. The R sub-pixel, G sub-pixel, and B sub-pixel in each of the plurality of pixel units (10) are connected to a first data line (31), wherein the first data line (31) is configured to provide an R signal to the R sub-pixel in a first time duration (t1), and a B signal to the B sub-pixel in a second time duration (t2). In each of the plurality of pixel units (10), the G sub-pixel is connected to a second data line (32) configured to provide a G signal to the G sub-pixel in the first time duration (t1) and second time duration (t2).
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: February 13, 2018
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Minghung Hsu
  • Patent number: 9892688
    Abstract: A display includes: a display panel, scan and data drivers, an ADC, a controller, and a data switch. In a first initialization period, the data switch connects data lines to the data driver, which applies an initialization voltage thereto. In a first sensing period, the data switch connects the data lines to the ADC. The ADC receives analog sensing signals corresponding to first voltages of the data lines, and converts the analog sensing signals into digital sensing signals output to the controller. In a second initialization period, the data switch connects the data lines to the data driver, which applies the initialization voltage thereto. In a second sensing period, voltages at the data lines change to second voltages, the data switch connects the ADC to the data lines, and the ADC converts analog sensing signals corresponding to the second voltages into digital sensing signals output to the controller.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: February 13, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hai Jung In, Dong Gyu Kim, Jung Bae Kim, Bo Yong Chung
  • Patent number: 9881558
    Abstract: A display device includes a display panel including a plurality of pixels, a control unit configured to scale image data provided from the outside based on an image load factor and to output the scaled image data, and a data driver configured to supply data signals corresponding to the scaled image data to a plurality of data lines connected to the pixels, wherein the control unit includes a load factor calculating unit configured to calculate a load factor of the image data; and a data scaler configured to scale a gray level of the image data based on a scaling ratio corresponding to a load factor.
    Type: Grant
    Filed: November 14, 2014
    Date of Patent: January 30, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Hoon Lee, Baek-Woon Lee, Jung-Taek Kim, Jae-Woo Song, Hae-Goo Jung
  • Patent number: 9878693
    Abstract: A communication system for a vehicle comprises a mechanism for sensing a motion status of a vehicle, a control device, plurality of data acquisition sensors, and one or more alerting device activation circuits. The communication system is customizable with the plurality of data acquisition sensors and one or more alerting device activation circuits based upon the needs of the vehicle.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: January 30, 2018
    Assignee: Vision Works IP Corporation
    Inventor: Fritz Braunberger
  • Patent number: 9858866
    Abstract: An organic light-emitting display device includes: an organic light-emitting panel comprising a plurality of pixel regions, each pixel region comprising a scan line and a data line crossing each other, each pixel region further comprising an organic light-emission element and a drive transistor configured to drive the organic light emission element; and a circuit configured to sense a threshold voltage of the drive transistor in a sensing interval and control a light emission of the organic light emission element within the pixel region in a display interval.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: January 2, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Jin Hyoung Kim, Seung Tae Kim, Kyoung Sik Choi, UiTaek Jeong
  • Patent number: 9858862
    Abstract: A display device and a method of driving the display device are discussed. The display device includes a display panel which has subpixels disposed at points where data lines intersect gate lines. A data driver supplies a data voltage corresponding to specific input data to the data lines. An analog-to-digital converter (ADC) senses the data voltage supplied to at least one data line of the data lines, and converts the sensed data voltage to digital sensed data. A timing controller supplies compensation data compensated based on the digital sensed data to the data driver, thereby compensating for a deviation of the data driver.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: January 2, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventors: OhJong Kwon, SungWoo Park
  • Patent number: 9830848
    Abstract: An exemplary embodiment of the present invention discloses a voltage generation circuit of a display apparatus, including at least one resistor, a memory configured to store a resistance value set signal, a controller changing a resistance value of the resistor referring to the resistance value set stored in the memory, and a voltage generator connected to one end of the resistor and is configured to receive an input current corresponding to the resistance value of the resistor and generate a gate-on voltage corresponding to the input current.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: November 28, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Jae-Won Jeong, Hyun Seok Hong, Young-Su Kim, Jinhyun Ko, Hyelim Kim, Kyung-Uk Choi, Sangyoung Lee