Having Compensating Pulse Patents (Class 345/78)
  • Patent number: 11024252
    Abstract: A power-saving driving circuit for a display panel is provided. The display panel includes a pixel array including a plurality of data lines. The data lines are grouped into a plurality of pixel regions according to a scan time. Each of the pixel regions has a plurality of pixels. The power-saving driving circuit includes at least one source driver. The source driver respectively supplies a driving voltage to the pixels on at least one of the data lines. The driving voltage supplied by the source driver to each of the pixel regions has a varying driving capability determined according to a pulse width and/or a rising slope of the driving voltage. The pulse width and/or the rising slope of the driving voltage is larger when the driving voltage is supplied for driving the pixels in the pixel region farther from the source driver.
    Type: Grant
    Filed: April 25, 2018
    Date of Patent: June 1, 2021
    Assignee: Novatek Microelectronics Corp.
    Inventors: Li-Tang Lin, Keko-Chun Liang
  • Patent number: 10957254
    Abstract: An electro-optical device includes one or more control lines that include a scanning line, a data line and a pixel circuit. The pixel circuit has a drive transistor, a write-in transistor with a gate which is electrically connected to the scanning line, a light-emitting element that emits light at a brightness that depends on the size of a current that is supplied through the drive transistor, and a control line which overlaps the gate of the drive transistor when viewed from a direction that is perpendicular to a surface of a substrate on which the pixel circuit is formed is included in the one or more control lines.
    Type: Grant
    Filed: January 6, 2020
    Date of Patent: March 23, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Takashi Toya, Takehiko Kubota
  • Patent number: 10957720
    Abstract: To provide a display device having a small circuit area and low power consumption. The display device includes a semiconductor device and a D/A converter circuit, and the semiconductor device includes first to third transistors and first and second capacitors. A first terminal of the first transistor is electrically connected to a first terminal of the first capacitor. A first terminal of the second transistor is electrically connected to a gate of the third transistor, a second terminal of the first capacitor, and a first terminal of the second capacitor. A first terminal of the third transistor is electrically connected to a second terminal of the second capacitor. An output terminal of the D/A converter circuit is electrically connected to a second terminal of the first transistor and a second terminal of the second transistor.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: March 23, 2021
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kei Takahashi, Susumu Kawashima, Koji Kusunoki, Kazunori Watanabe
  • Patent number: 10827582
    Abstract: The present disclosure provides an electronic device including a light-emitting unit and at least one circuit unit. The light-emitting unit includes at least two diodes coupled in series. At least one of the diodes is a light-emitting diode for generating light. The circuit unit includes a thin-film transistor or switch component coupled to a first end of the light-emitting unit and a power source.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: November 3, 2020
    Assignee: InnoLux Corporation
    Inventors: Li-Wei Mao, Chin-Lung Ting, Ming-Chun Tseng
  • Patent number: 10804337
    Abstract: Disclosed is an in-cell type organic electroluminescent device. The in-cell type organic electroluminescent device according to an embodiment of the present disclosure includes at least one OLED-driving Thin-Film Transistor (OLED driving TFT) that is formed on a substrate and drives an organic light emitting device (OLED); the OLED connected to the at least one OLED driving TFT through a first contact hole; at least one touch-sensing thin-film transistor (though sensing TFT) that is simultaneously formed with the at least one OLED driving TFT on the substrate and senses touch; and an touch electrode that is connected to the at least one touch sensing TFT through a second contact hole and does not overlap with the OLED, wherein the at least one OLED driving TFT and the at least one touch sensing TFT share a gate line.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: October 13, 2020
    Assignee: UNIVERSITY-INDUSTRY COOPERATION GROUP OF KYUNG HEE UNIVERSITY
    Inventors: Jin Jang, Yuanfeng Chen, Jae Gwang Um
  • Patent number: 10720100
    Abstract: An organic light emitting display (OLED) device may include a display panel, a gate driver, a data driver, a timing controller and a deterioration compensation unit. The deterioration compensator may detect one or more deteriorated regions in the display region based on stress data of the respective pixels, the stress data being generated by counting input data corresponding to the respective pixels, and generate compensation data of pixels included in each of the deteriorated regions, based on the stress data of the respective pixels and sensing data for deteriorations of pixels included in two or more horizontal lines which are arbitrarily selected among horizontal lines corresponding to the deteriorated region.
    Type: Grant
    Filed: October 23, 2017
    Date of Patent: July 21, 2020
    Assignee: LG Display Co., Ltd.
    Inventors: Jeisung Lee, Namseok Choi, Joo-Young An, Jihoon Park, Chulha Park
  • Patent number: 10650744
    Abstract: Disclosed is a method for compensating a pixel driving circuit of an OLED display panel. In the compensation method, a driving transistor is enabled to operate stably in a saturation region for twice, and a threshold voltage of the driving transistor is calculated based on a collected charging voltage and charging time. A pixel driving circuit is compensated by establishing a threshold-voltage compensation table. The compensation method is easy to operate and can significantly improve a detecting speed of a threshold voltage. Moreover, an effect of a voltage-current conversion factor on detecting accuracy of a threshold voltage can be avoided.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: May 12, 2020
    Assignee: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yufeng Jin, Hongjun Xie
  • Patent number: 10573665
    Abstract: With an increase in the definition of a display device, the number of pixels is increased, and thus the numbers of gate lines and signal lines are increased. Due to the increase in the numbers of gate lines and signal lines, it is difficult to mount an IC chip having a driver circuit for driving the gate and signal lines by bonding or the like, which causes an increase in manufacturing costs. A pixel portion and a driver circuit for driving the pixel portion are formed over one substrate. At least a part of the driver circuit is formed using an inverted staggered thin film transistor in which an oxide semiconductor is used. The driver circuit as well as the pixel portion is provided over the same substrate, whereby manufacturing costs are reduced.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: February 25, 2020
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Kengo Akimoto, Atsushi Umezaki
  • Patent number: 10540924
    Abstract: The present invention discloses a source driver that drives a source driver. The source driver is configured in such a manner that a source driving module for driving display data and a conversion module for converting a sensing signal of a display panel into sensing data share components thereof. Thus, the area of the source driver can be reduced.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: January 21, 2020
    Assignee: Silicon Works Co., Ltd
    Inventors: Jae Kwan Lee, Jong Keun Hwang
  • Patent number: 10467953
    Abstract: The present disclosure relates to a pixel driving circuit and an organic light-emitting diode (OLED) display having the pixel driving circuit. The pixel driving circuit adopts a 6T2C (six transistors and two capacitors) structure to compensate a threshold voltage of the driving thin film transistor (TFT) in the pixel. As such, a current passing through the OLED may not be related to the threshold voltage of the driving TFT. So as to eliminate the improper image-displaying of the OLED display resulting from the drifting of the threshold voltage of the driving TFT.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: November 5, 2019
    Assignee: Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd
    Inventors: Bobiao Chang, Xiaolong Chen, Yi-chien Wen, Ming-jong Jou
  • Patent number: 10446076
    Abstract: A display device related to one embodiment of the present invention includes a plurality of pixel circuits each connected to a scanning signal line, initialization control signal line, light emitting control signal line and video signal line, wherein each of the plurality of pixel circuits includes a first transistor connected to the scanning signal line and the video signal line, a second transistor connected to a first node and the first transistor, a third transistor connected to the first node and a scanning signal line, a fourth transistor connected to the second transistor and the light emitting control signal line, and a fifth transistor connected to the second transistor, a power supply voltage line, and the light emitting control signal line.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: October 15, 2019
    Assignee: Japan Display Inc.
    Inventor: Ilin Wu
  • Patent number: 10410581
    Abstract: A display device related to one embodiment of the present invention includes a plurality of pixel circuits each connected to a scanning signal line, initialization control signal line, light emitting control signal line and video signal line, wherein each of the plurality of pixel circuits includes a first transistor connected to the scanning signal line and the video signal line, a second transistor connected to a first node and the first transistor, a third transistor connected to the first node and a scanning signal line, a fourth transistor connected to the second transistor and the light emitting control signal line, and a fifth transistor connected to the second transistor, a power supply voltage line, and the light emitting control signal line.
    Type: Grant
    Filed: December 2, 2016
    Date of Patent: September 10, 2019
    Assignee: Japan Display Inc.
    Inventor: Ilin Wu
  • Patent number: 10339358
    Abstract: The disclosure provides a palmprint recognition circuit based on a LTPS technology, a palmprint recognition method and a display screen. The palmprint recognition circuit comprises an optical signal collecting unit, configured to collect an optical signal indicating a palmprint information and convert the collected optical signal into a current signal; a current signal amplifying unit, configured to amplify the converted current signal; and a current signal detecting unit, and configured to detect an intensity of the amplified current signal which indicates a ridge line or a valley line of the palmprint in the palmprint information. Therefore, it can solve the problem of having no palmprint recognition circuit and method for a LTPS-TFT display panel. This can eliminate an influence of a change of parasitic capacitance on the recognition result, wherein the change of parasitic capacitance is caused by a change of a wiring manner in the circuit.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 2, 2019
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Xiaoliang Ding, Xue Dong, Haisheng Wang, Xiaochuan Chen, Yingming Liu, Shengji Yang, Lei Wang, Wei Liu, Weijie Zhao, Changfeng Li, Tao Ren
  • Patent number: 10311786
    Abstract: A light emitting display device including: a display panel; a plurality of pixels included in the display panel, each of the plurality of pixels including a driving switching element connected to a first power line and a light emitting element connected to a second power line; a maximum voltage detection unit for detecting a voltage from each of the light emitting elements of each of the pixels and outputting a maximum voltage that has a highest voltage level among the detected voltages; and a power supply unit for correcting a first driving voltage based on the maximum voltage and applying the corrected first driving voltage to the first power line.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: June 4, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Wonsik Oh, Myungho Lee, Geunjeong Park, Myoungseop Song
  • Patent number: 10204551
    Abstract: An OLED driving circuit is disclosed. The OLED driving circuit includes at least two types of pixel driving circuits for driving each pixel of an OLED display panel. The at least two types of the pixel driving circuits have different types and/or amounts of elements so a different pixel driving circuit is designed for each pixel. In comparison with a current display panel using the same driving circuit, a part of the pixel driving circuit is simplified to simplify a structure and to reduce a space occupied by the OLED driving circuit on an effective area of the display panel.
    Type: Grant
    Filed: December 30, 2016
    Date of Patent: February 12, 2019
    Assignee: Wuhan China Star Optoelectronics Technology Co., Ltd
    Inventor: Di Zhang
  • Patent number: 10056038
    Abstract: The present disclosure discloses an organic light emitting display panel, a driving method thereof, and an organic light emitting display apparatus. The organic light emitting display panel includes a plurality of pixel driving circuits, comprising: a driving module including a driving transistor and a first capacitor; an initialization module for initializing potentials of a gate and a first electrode of the driving transistor at least under the control of a first scanning signal terminal; a data writing module for transmitting a signal of a data signal terminal to a second electrode plate of a first capacitor under the control of the first or a second scanning signal terminal; a light emitting control module for transmitting a potential signal of the first electrode of the driving transistor to the second electrode plate of the first capacitor and driving an organic light emitting diode to emit light.
    Type: Grant
    Filed: May 12, 2017
    Date of Patent: August 21, 2018
    Assignee: SHANGHAI TIANMA AM-OLED CO., LTD.
    Inventors: Dongxu Xiang, Yue Li, Tong Wu, Zeyuan Chen, Gang Liu, Dong Qian
  • Patent number: 9966009
    Abstract: A display device in an embodiment according to the present invention includes a pixel region includes a plurality of pixels arranged in a matrix, a first power source line arranged in the pixel region and provided with a first power source voltage supplying a current to the plurality of pixels, a second power source line located in a layer higher than the first power source line in the pixel region and including an intersection part intersecting the first power source line and provided with a second power source voltage different to the first power source voltage, a conducting layer interposed between the first power source line and the second power source line via an insulation layer and having at least one part overlapping the intersection part, a current detection portion electrically connected with the conducting layer.
    Type: Grant
    Filed: September 8, 2016
    Date of Patent: May 8, 2018
    Assignee: Japan Display Inc.
    Inventors: Yuuichi Numata, Takahiro Fujioka, Kazuhiro Odaka, Hiroyuki Kimura
  • Patent number: 9928776
    Abstract: An organic light emitting display device includes a display panel including a plurality of pixels, a scan driver configured to provide a scan signal to the pixels via a plurality of scan lines, a data driver configured to provide a data signal to the pixels via a plurality of data lines, and a readout circuit connected to the pixels via a plurality of readout lines, the readout circuit including a current-voltage converter configured to convert a current flowing through one of the readout lines into a first voltage, an analog-digital converter configured to convert the first voltage or a second voltage of the one of the readout lines into a digital data, and a switching circuit configured to control a connection among the one of the readout lines, the current-voltage converter, and the analog-digital converter.
    Type: Grant
    Filed: March 3, 2016
    Date of Patent: March 27, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jin-Woo Kim
  • Patent number: 9812218
    Abstract: A pulse is inputted to TFTs 101 and 104 so that the TFTs would turn ON and then potential of a node ? rises. When the potential of the node ? reaches (VDD?VthN), the node ? became in a floating state. Accordingly, a TFT 105 then turns ON, and potential of an output node rises as a clock signal reaches the level H. On the other hand, potential of a gate electrode of the TFT 105 further rises due to an operation of capacitance 107 as the potential of the output node rises, so that the potential of the output node would be higher than (VDD+VthN). Thus, the potential of the output node rises to VDD without voltage drop caused by a threshold of the TFT 105.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: November 7, 2017
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Munehiro Azami, Shou Nagao, Yoshifumi Tanada
  • Patent number: 9773456
    Abstract: A data voltage compensation circuit includes a compensation information provider, a gamma register, and a compensation data voltage provider. The compensation information provider generates a test data voltage based on a test power supply voltage and a test reference voltage, and provides compensation information corresponding to the test data voltage. The gamma register provides a gamma value corresponding to display data. The compensation data voltage provider provides a compensation data voltage based on the gamma value, the compensation information, and a reference voltage. Changes in the reference voltage change a power supply voltage of a display panel.
    Type: Grant
    Filed: April 2, 2015
    Date of Patent: September 26, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyun-Suk Kang
  • Patent number: 9678614
    Abstract: The present invention discloses a touch display panel, a detecting method thereof, and a display device. The common electrode layer is divided into a plurality of independent self capacitance electrodes, and the common electrode is multiplexed as self capacitance electrodes. There is no need to provide an additional film, and it is only required to modify the pattern of the common electrode layer in the current LCD panel. Thus, the production cost is reduced, and the production efficiency is improved. Since the self capacitance electrodes are formed by dividing the common electrode layer in the above-mentioned touch display panel, a compensating electrode is further provided which is arranged in a layer different from that of the self capacitance electrodes, is insulated from the self capacitance electrodes, and at least covers a portion of a partition gap between neighboring self capacitance electrodes. A common electrode signal is applied to the compensating electrode during a display period.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: June 13, 2017
    Assignees: Boe Technology Group Co., Ltd., Beijing Boe Optoelectronoic Technology Co., Ltd.
    Inventors: Rui Xu, Lei Wang, Yanchen Li, Xi Chen, Yingming Liu, Shengji Yang, Zhiying Bao, Yue Li, Zhenhua Lv, Weijie Zhao, Hailin Xue
  • Patent number: 9660192
    Abstract: Disclosed is an organic electroluminescent display device, a method for manufacturing the same and a display apparatus. The organic electroluminescent display device comprises: a substrate; a thin film transistor disposed on the substrate and including a gate electrode and an active layer insulated with each other, and a source electrode and a drain electrode connected with the active layer; and an organic electroluminescent structure disposed on the substrate and including an anode, a luminescent layer and a cathode stacked sequentially, the anode and the drain electrode being electrically connected with each other. The anode and the active layer are disposed in the same layer. The active layer is made of a transparent oxide semiconductor material. The anode is made of the transparent oxide semiconductor material undergone a plasma treatment.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: May 23, 2017
    Assignee: BOE Technology Group Co., Ltd.
    Inventor: Zhangchun Ren
  • Patent number: 9462254
    Abstract: An image sensor 2 includes: a photoelectric conversion layer 1d including a plurality of photosensitive cells; a reflective layer 1c that reflects light that has been transmitted through the photoelectric conversion layer 1d; a micro lens layer 1a that includes a plurality of micro lenses that are arranged between the photoelectric conversion layer 1d and the reflective layer 1c; and a transmitted light controlling layer 1b that is arranged between the photoelectric conversion layer 1d and the reflective layer 1c and that is able to change optical transmittance in accordance with an instruction given by a controller. The micro lens layer 1a is arranged so that light that has been transmitted through one of the photosensitive cells and then reflected from the reflective layer 1c is incident on the same photosensitive cell again.
    Type: Grant
    Filed: January 16, 2013
    Date of Patent: October 4, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Masao Hiramoto, Yasunori Ishii, Yusuke Monobe
  • Patent number: 9384693
    Abstract: A pixel circuit includes one organic light emitting diode, five first transistors and two capacitors. The first and third transistors have terminals coupled to a first voltage. The second transistor has two terminals coupled to another terminal of the first transistor and a second voltage through the organic light emitting diode, respectively. The first capacitor has a terminal coupled to one terminal of the second transistor. The third transistor has a terminal coupled to one terminal of the first capacitor. The second capacitor has two terminals coupled to a control terminal of the second transistor and another terminal of the first capacitor, respectively. The fourth transistor has two terminals coupled to the terminal of the second transistor and a control terminal of the second transistor, respectively. The fifth transistor has a terminal coupled to the another terminal of the second transistor. A display apparatus is also provided.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: July 5, 2016
    Assignee: AU OPTRONICS CORP.
    Inventors: Hua-Gang Chang, Yu-Shian Lin
  • Patent number: 9349315
    Abstract: An organic light-emitting display device includes: an organic light-emitting panel defined into a plurality of pixel regions which each includes a drive transistor configured to drive an organic light emission element and a load capacitor configured to charge a threshold voltage of the drive transistor; and a controller configured to calculate an offset information on the basis of the threshold voltage and derive a second image signal by reflecting the offset information to a first image signal.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: May 24, 2016
    Assignee: LG Display Co., Ltd.
    Inventor: Ui Taek Jeong
  • Patent number: 9349324
    Abstract: A pixel circuit includes four transistors, two capacitors and a light emitting element. A gate of first transistor receives a scan signal and a source/drain thereof receives a display data. A terminal of first capacitor couples to another source/drain of first transistor. A gate and a source/drain of second transistor couple to another terminal of first capacitor; and another source/drain thereof receives a switch signal. A terminal of second capacitor receives a reset signal; and another terminal thereof couples to another terminal of first capacitor. A gate of third transistor couples to a terminal of first capacitor. A gate of fourth transistor receives an enable signal; a source/drain thereof couples to a first power supply voltage; and another source/drain thereof couples to one source/drain of third transistor. The anode and cathode of the light emitting element couple to one source/drain of third transistor and a second power supply voltage, respectively.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: May 24, 2016
    Assignee: AU OPTRONICS CORP.
    Inventors: Hua-Gang Chang, Man-Wen Shih, Ching-Kai Lo, Chien-Chung Huang
  • Patent number: 9336706
    Abstract: An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes a plurality of pixels, a luminance measuring unit, a current measuring unit, and a compensation data generator. The luminance measuring unit measures the luminance of each pixel and generates luminance information corresponding to the measured luminances. The current measuring unit measures the current output from each pixel and generates current information corresponding to the measured currents. The compensation data generator generates compensation data including a compensation value for each pixel based on the luminance information and/or the current information.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: May 10, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Kyung-Man Kim
  • Patent number: 9336715
    Abstract: A display device comprising a plurality of pixels is disclosed.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: May 10, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Myeon Han
  • Patent number: 9153631
    Abstract: The present invention provides an organic light emitting diode display device comprising a substrate comprising a display region and a non-display region, a thin film transistor formed in the display region; an organic light emitting layer connected to the thin film transistor, a bank formed to define a light emitting region of the organic light emitting layer, a metal pattern disposed in the non-display region and not covered with the bank; and a conductive pattern connected to the organic light emitting layer while covering the metal pattern and partially physically separated on the metal pattern.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: October 6, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Kiyoung Sung, Sangsoo Kim, Sang-il Shin
  • Patent number: 9123296
    Abstract: Disclosed are an organic light emitting display device and a display panel thereof, which are capable of performing a recovery driving for recovering a threshold voltage of a driving transistor to be within a range of compensation for the threshold voltage if the threshold voltage of the driving transistor deviates from the range of the compensation for the threshold voltage as a driving time of the driving transistor of a pixel increases.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: September 1, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: WooJin Nam, HongJae Shin
  • Patent number: 9123297
    Abstract: A method for driving a display apparatus including a current light emitting device which allows a threshold voltage of a driving transistor to be detected independently of an image signal voltage Vsg (j), such that a writing period of the display apparatus can be shortened. The writing period T3 of the display apparatus is larger than a sum of a time needed for determining image signal voltage Vsg (j) and a time needed for charging a first capacitor which is coupled to a gate of the driving transistor.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: September 1, 2015
    Assignee: JOLED INC
    Inventor: Hitoshi Tsuge
  • Patent number: 9041631
    Abstract: A display device, a method for driving the same, and an electronic device capable of making ? correction function reliably even in the case where light emission luminance is low. A potential difference between the gate and the source of a transistor is corrected to a threshold voltage of the transistor. After that, while a horizontal drive circuit outputs a third voltage Vofs2, correction of mobility of the transistor starts. Subsequently, while the horizontal drive circuit outputs a second voltage Vsig, writing of a voltage according to the second voltage Vsig to the gate of the transistor is started.
    Type: Grant
    Filed: September 24, 2012
    Date of Patent: May 26, 2015
    Assignee: SONY CORPORATION
    Inventor: Shoji Araki
  • Publication number: 20150130780
    Abstract: An organic light emitting display includes a plurality of pixels and a compensation unit. Each of the pixels includes a driving transistor to control an amount of current supplied to a corresponding organic light emitting diode. The compensation unit is coupled to the pixels by data lines and includes at least one sensing unit. The sensing unit extracts threshold voltage information from the pixels corresponding to respective driving transistors. The sensing unit receives noise currents from a plurality of data lines, offset the noise currents, and extracts the threshold voltage information after offset of the noise currents.
    Type: Application
    Filed: October 20, 2014
    Publication date: May 14, 2015
    Inventors: Oh-Jo KWON, Boo-Dong KWAK, Choong-Sun SHIN
  • Publication number: 20150130690
    Abstract: An organic light emitting display includes a power supply source and a power voltage compensation unit. The power supply source supplies at least a first power voltage to a first power voltage line of the display. The power voltage compensation unit to generate a first compensation power voltage based on the first power voltage and a feedback power voltage from the first power voltage line. The first power voltage compensation unit outputs the first compensation power voltage to the first power voltage line.
    Type: Application
    Filed: November 10, 2014
    Publication date: May 14, 2015
    Inventors: In-Hwan KIM, Min-Cheol KIM, Byung-Geun JUN
  • Patent number: 9030452
    Abstract: The described technology relates to a liquid crystal display and a driving method thereof. The liquid crystal display includes a plurality of pixels arranged in a matrix form. The pixels include a liquid crystal capacitor including a pixel electrode and a common electrode as two terminals. A plurality of data lines transfer data to the plurality of pixels. The pixels include a first pixel and a second pixel, which are adjacent to each other. First and second common signals are applied to the common electrode of the first and second pixels, respectively. The second common signal is inverted to the first common signal. The first and second common signals swing between a first voltage and a second voltage. The polarity of the data voltage transferred by a data line with respect to the first common signal or the second common signal is constant during one frame.
    Type: Grant
    Filed: September 10, 2013
    Date of Patent: May 12, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Dae-Gwang Jang, Seok Ha Hong, Joon-Chul Goh, Byung Sun Kim, Sang Mi Kim, Ji Myoung Seo
  • Publication number: 20150123953
    Abstract: An organic light emitting display can include a display panel including a plurality of pixels of a source following manner, in which a source voltage of a driving thin film transistor (TFT) is changed according to a current flowing between a drain electrode and a source electrode of the driving TFT, a gate driving circuit for generating a mobility sensing gate pulse for operating the pixel in the source following manner, a data driving circuit for detecting a sensing voltage corresponding to mobility of the driving TFT from the pixel in response to the mobility sensing gate pulse, and a timing controller for setting a mobility sensing period in a period, in which a gate-source voltage of the driving TFT is greater than a threshold voltage of the driving TFT.
    Type: Application
    Filed: November 6, 2014
    Publication date: May 7, 2015
    Applicant: LG Display Co., Ltd.
    Inventors: Jongsik SHIM, Hongjae SHIN, Nayoung BAE
  • Publication number: 20150109189
    Abstract: An organic light-emitting display apparatus includes: a plurality of emitting pixels coupled to a plurality of scan lines extending in a row direction and a plurality of data lines extending in a column direction; a plurality of dummy pixels arranged in the row direction; a plurality of first repair lines extending in the column direction, that are coupled to the plurality of dummy pixels, and that are adapted to be coupled to the plurality of emitting pixels; a plurality of second repair lines extending in the column direction, and that are coupled to the plurality of dummy pixels; and a plurality of repair switching devices arranged in a matrix array and adapted to be coupled to the plurality of scan lines and the plurality of second repair lines and adapted to be coupled to the plurality of data lines.
    Type: Application
    Filed: March 4, 2014
    Publication date: April 23, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventors: Young-In Hwang, Young-Jin Cho, Dong-Gyu Kim
  • Patent number: 9013379
    Abstract: A pulse generator that is capable of improving (e.g., increasing) the rising and falling speeds of its pulses. The pulse generator includes a third switch and a first diode serially coupled between a first power source and a data line; a fourth switch and a second diode serially coupled between the data line and a second power source configured to have a voltage lower than that of the first power source; a pulse controller for increasing a voltage of the data line to a voltage higher than that of the first power source or for reducing the voltage of the data line to a voltage lower than that of the second power source; and a first capacitor coupled between the pulse controller and the data line.
    Type: Grant
    Filed: August 12, 2011
    Date of Patent: April 21, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Do-Ik Kim, Joo-Hyeon Jeong
  • Patent number: 9013372
    Abstract: Disclosed herein is a display apparatus, including: a pixel array section including a plurality of pixels, a writing transistor, a driving transistor, a first switching transistor, a holding capacitor, and a second switching transistor; a first scanning section configured to drive the writing transistor in a unit of a row of the pixels; a second scanning section configured to drive the switching transistors in synchronism with scanning by the first scanning section; and a third scanning section configured to control the second switching transistors to a non-conducting state within a period after the image signal is written by the writing transistor until the signal writing period of the same row of the pixels ends but to a conducting state within any other period.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: April 21, 2015
    Assignee: Sony Corporation
    Inventors: Yutaka Mitomi, Masatsugu Tomida, Katsuhide Uchino
  • Patent number: 8994711
    Abstract: An EL display having high operating performance and reliability is provided. LDD regions 15a through 15d of a switching TFT 201 formed in a pixel are formed such that they do not overlap gate electrodes 19a and 19b to provide a structure which is primarily intended for the reduction of an off-current. An LDD region 22 of a current control TFT 202 is formed such that it partially overlaps a gate electrode 35 to provide a structure which is primarily intended for the prevention of hot carrier injection and the reduction of an off-current. Appropriate TFT structures are thus provided depending on required functions to improve operational performance and reliability.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: March 31, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Yukio Yamauchi, Takeshi Fukunaga
  • Patent number: 8994635
    Abstract: The invention provides an image display device capable of reducing the transmission delay of a scanning signal. A plurality of scanning signal lines are wired in one pixel circuit row. Pixel circuits of the pixel circuit row are connected to any of the plurality of scanning signal lines.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: March 31, 2015
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Kenta Kajiyama, Takeshi Izumida, Norihiro Nakamura, Naoki Tokuda
  • Patent number: 8994621
    Abstract: A display device (100) includes a plurality of pixel circuits (10), a gate driver circuit (2) coupled to a plurality of scanning signal lines Gi and a plurality of control lines Ei, and a power control circuit (4) coupled to a plurality of power lines VPi via a common power line. The pixel circuits (10) each include an organic EL element, a plurality of TFTs, and a capacitor, and are controlled to collectively receive initialization potentials at the beginning of a frame through the power lines VPi, collectively perform threshold detection immediately thereafter, and then perform writing and light-emission operations. Thus, the aperture ratio of the pixel circuits (10) can be kept high, the power control circuit (4) typically has only one output buffer so that the circuit scale thereof is small, drive by potential is performed only once, so that power consumption is low, and threshold detection is performed only once, so that a sufficient amount of time can be ensured for a detection period.
    Type: Grant
    Filed: June 1, 2011
    Date of Patent: March 31, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Noritaka Kishi, Noboru Noguchi
  • Patent number: 8982019
    Abstract: An organic light emitting diode (OLED) display device includes a plurality of OLED pixels. In one aspect, each pixel respectively includes a first capacitor connected between a data line and a first node, a switching transistor connecting the first node and a second node, a second capacitor connected between the second node and a third node, a driving transistor having a gate electrode connected to the third node and controlling a driving current flowing from a first power source voltage to an OLED, and a reference voltage transistor transmitting a reference voltage to the first node.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: March 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Myeon Han
  • Patent number: 8976090
    Abstract: There is provided a pixel circuit capable of obtaining high-luminance while suppressing power consumption. Further, there are provided a display panel having the pixel circuit, and a display device including the display panel. Still further, there is provided an electronic unit including the display device. The pixel circuit includes a first transistor driving a light-emitting element, a plurality of holding capacitors connected in series between a gate and a source of the first transistor, a second transistor provided between a first signal line and the gate of the first transistor, and a third transistor provided between a second signal line and one of junctions of the holding capacitors.
    Type: Grant
    Filed: February 27, 2012
    Date of Patent: March 10, 2015
    Assignee: Sony Corporation
    Inventors: Tetsuro Yamamoto, Katsuhide Uchino
  • Patent number: 8970642
    Abstract: In one aspect, the display device includes a display unit including a plurality of pixels connected to scan lines, light emission control lines, and data lines, where each pixel is configured to emit light with a driving current corresponding to image data signals transmitted through the data lines based on light emission control signals transmitted through the light emission control lines. Each of the pixels includes subpixels, each configured to display one of a plurality of colors. The device also includes a controller configured to convert external video signals to image data signals, output the converted signals to a data driver, generate light emission driving control signals for controlling the light emission duty ratio of the light emission control signals, and calculate the pixel-on-ratio for each subpixel to reduce the driving current.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: March 3, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Bo-Young An, Ho-Suk Maeng
  • Publication number: 20150054864
    Abstract: A color compensation method is disclosed. In one aspect, the method includes predetermining target color coordinates, measuring luminance and chromaticity from an image displayed on a display panel, and calculating compensation color coordinates by using the target color coordinates and the device color coordinates. The method also includes generating compensation data by using the target color coordinates, the device color coordinates, and the compensation color coordinates, receiving an external video signal, and converting the RGB data of the external video signal into the RGB data of the compensation color coordinates by using the compensation data corresponding to the RGB data of the external video signal. The compensation color coordinates are determined according to the values of the target color coordinates and the device color coordinates.
    Type: Application
    Filed: June 5, 2014
    Publication date: February 26, 2015
    Inventor: Yong-Seok CHOI
  • Patent number: 8963816
    Abstract: There are provided a light emitting display comprising at least a light emitting unit comprising at least two light emitting diodes which are electrically connected to the same driving unit to emit light, and a plurality of voltage sources whereby one voltage source supplies a voltage different from the other voltage(s) supplied from the other voltage source(s) to each of the light emitting diodes.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: February 24, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Seong Ho Baik, In Hwan Kim, Seung Chan Byun
  • Patent number: 8957837
    Abstract: A pixel is capable of securing enough threshold voltage compensating time in high resolution and high frequency driving and of compensating for the IR drop of a first power source ELVDD, and an organic light emitting display includes the pixel.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: February 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sam-Il Han
  • Publication number: 20150042688
    Abstract: An organic light-emitting diode (OLED) display is disclosed. In one aspect, the OLED display includes a plurality of pixels, a luminance measuring unit, a current measuring unit, and a compensation data generator. The luminance measuring unit measures the luminance of each pixel and generates luminance information corresponding to the measured luminances. The current measuring unit measures the current output from each pixel and generates current information corresponding to the measured currents. The compensation data generator generates compensation data including a compensation value for each pixel based on the luminance information and/or the current information.
    Type: Application
    Filed: March 24, 2014
    Publication date: February 12, 2015
    Applicant: Samsung Display Co., Ltd.
    Inventor: Kyung-Man Kim
  • Patent number: 8952951
    Abstract: An organic light emitting diode display that includes pixels having organic light emitting diodes and driving transistors for supplying a driving current to the respective organic light emitting diodes. Also included is a compensator for receiving a predetermined voltage applied to a gate electrode of the respective driving transistors, finding a threshold voltage, mobility, and a change of mobility of the driving transistors, and determining a compensation amount caused by an input image data signal while sinking a predetermined current to a path of a driving current to the organic light emitting diode through a data line connected to the pixels. Further included is a timing controller for receiving the compensation amount, correcting the input image data signal, and transmitting the corrected image data signal and a data driver for generating a data voltage based on the corrected image data signal, and supplying the data voltage to the pixels.
    Type: Grant
    Filed: September 22, 2010
    Date of Patent: February 10, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Myoung-Hwan Yoo, Choon-Yul Oh