Diverse-type Energizing Or Bias Supplies To Different Electrodes Patents (Class 315/169.1)
  • Patent number: 9190003
    Abstract: A display apparatus includes a plurality of first gate lines extended in a first direction and disposed on a substrate on which a plurality of pixels is disposed, a plurality of second gate line extended in a second direction to cross the first gate lines, a plurality of data lines disposed substantially parallel to the first gate lines, and a first insulating layer disposed between the first gate lines and the second gate lines and provided with a plurality of via holes to expose a portion of a corresponding first gate line of the first gate lines. Each of the first gate lines makes contact with a corresponding second gate line of the second gate lines through a corresponding via hole of the via holes.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: November 17, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sungman Kim, ManHong Na, Min-Chul Song, Junho Song, Eugene Lee, Sung-Hoon Lim, YoungJe Cho, Soojung Chae
  • Patent number: 9183792
    Abstract: A display apparatus comprises pixels (18) associated with intersections of select electrodes (17) and data electrodes (11) and having a bistable operation. A select driver (16) supplies select voltages (VG) to the select electrodes (17) to select a group of pixels (18). A data driver (10) supplies data voltages (VD) to the data electrodes (11) to supply the data voltages (VD) to the group of pixels (18) being selected. A common driver (25) supplies a backplane voltage (VB) to a common electrode (6) common for the group of pixels (18).
    Type: Grant
    Filed: December 9, 2009
    Date of Patent: November 10, 2015
    Assignee: HJ FOREVER PATENTS B.V.
    Inventors: Alex Henzen, Daniel Wiermans, Patrick Janssen
  • Patent number: 9171492
    Abstract: To provide an active matrix display device in which power consumption of a signal line driver circuit can be suppressed, so that power consumption of the entire memory can be suppressed. A plurality of memory circuits which can write data of a video signal input to a pixel in one line period and can hold the data are provided in a signal line driver circuit of a display device. Then, the data held in each memory circuit is input to a pixel of a corresponding line as a video signal. By providing two or more memory circuits in a driver circuit, pieces of data of video signals corresponding to two or more line periods can be concurrently held in the memory circuits.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: October 27, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Yasunori Yoshida
  • Patent number: 9167635
    Abstract: A light emitting apparatus includes a light emitting element, a driving circuit which has a driving transistor having a gate, a drain, and a source, and a capacitor having one end connected to the gate, a power line, and first and second voltage lines, and, in a period in which the gate and the drain are short-circuited and the drain and the light emitting element are blocked, the source is connected to the first voltage line and the other end of the capacitor is connected to the second voltage line to hold a voltage in the capacitor, and, in a period in which the gate and the drain are disconnected and the drain and the light emitting element are connected, the source is connected to the power line, and the other end of the capacitor is connected to the source to supply a current to the light emitting element.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: October 20, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takanori Yamashita, Masami Iseki, Tsuyoshi Yabukane
  • Patent number: 9136497
    Abstract: An electroluminescence generating device comprising a channel of organic semiconductor material, said channel being able to carry both types of charge carriers, said charge carriers being electrons and holes; an electron electrode, said electron electrode being in contact with said channel and positioned on top of a first side of said channel layer or within said channel layer, said electron electrode being able to inject electrons in said channel layer; a hole electrode, said hole electrode being spaced apart from said electron electrode, said hole channel and positioned on top of within said channel layer, said hole electrode being able to inject holes into said channel; a control electrode positioned on said first side or on a second side of said channel; whereby light emission of said electroluminescence generating device can be acquired by applying an electrical potential difference between said electron electrode and said hole electrode.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: September 15, 2015
    Assignee: E.T.C. S.R.L.
    Inventor: Michele Muccini
  • Patent number: 9129556
    Abstract: A display device includes a scan driver, a data driver, a power supply unit configured to supply power through a plurality of power supply inlet portions, a pixel unit including a plurality of pixels that receives scan signals, emission control signals, data signals and the power so as to display an image, the pixel unit being partitioned into a plurality of partition areas to correspond to the respective power supply inlet portions, and a current limit circuit configured to calculate values of current for each of the partition areas based on gray scale data of an image signal, and configured to correct the gray scale data so as to limit luminance of the pixel unit when at least one of the values of current for each partition area is a reference value or more.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: September 8, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventor: Kyong-Tae Park
  • Patent number: 9105235
    Abstract: A method of driving an active display device. The method including recovering a threshold voltage of a switching transistor connected to a pixel. The recovering including applying a negative bias voltage to the switching transistor prior to charging each pixel during a charging period. The negative bias voltage is applied to a drain of the switching transistor.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: August 11, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae-woong Kwon, Byung-gook Park, Chang-jung Kim, Jae-chul Park
  • Patent number: 9092080
    Abstract: An organic light emitting diode display with improved aperture ratio includes: a substrate; first and second pixels disposed in a first row of the substrate and third and fourth pixels disposed in a second row adjacent to the first row and respectively disposed in the same columns as the first and second pixels; a scan line and a previous scan line applying a scan signal and a previous scan signal, respectively, to the pixel units; a data line and a driving voltage line applying a data signal and a driving voltage, respectively, to the pixel units; and a common initialization voltage line disposed between the first and second pixels and between the third and fourth pixels, commonly connected to the pixel units, and applying an initialization voltage. One common initialization contact hole connected to all pixels units and one initialization voltage line connected to the common initialization contact hole are surrounded by the pixel units.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: July 28, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ju-Hee Hyeon, Hyun-Chol Bang
  • Patent number: 9082998
    Abstract: An organic electroluminescent display module includes: an organic electroluminescent display panel including a front surface, a side surface and a rear surface, the front surface displaying images; and a bottom frame surrounding the side and rear surfaces partially, the bottom frame including a metallic material.
    Type: Grant
    Filed: September 15, 2010
    Date of Patent: July 14, 2015
    Assignee: LG DISPLAY CO., LTD.
    Inventor: Hyun Lee
  • Patent number: 9064450
    Abstract: Disclosed herein is a display device including: a red pixel configured to be provided with a red light-emitting element that generates red light; a green pixel configured to be provided with a green light-emitting element that generates green light; and two blue pixels configured to be provided with blue light-emitting elements that generate blue light and have the same structure, wherein a color filter is provided on a light-extraction side of at least one of the two blue pixels so that blue light beams having different y-values in an xy chromaticity coordinate system are extracted from the two blue pixels.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: June 23, 2015
    Assignee: JOLED INC.
    Inventor: Mitsuhiro Kashiwabara
  • Patent number: 9064473
    Abstract: A method of reducing power consumption of an electro-optical display device which can display a still image with the use of analog signals. A circuit in which a small amount of leakage current flows between a source and a drain of a selection transistor when the selection transistor is off; the source of the selection transistor is connected to a gate of an N-channel driving transistor, a gate of a P-channel driving transistor, and one electrode of a capacitor; and a source of each of the N-channel driving transistor and the P-channel driving transistor is connected to one electrode of a display element is provided in each pixel. The longest time of one frame is set to 100 seconds or longer with the use of such a circuit, whereby power consumption at the time of rewriting is reduced.
    Type: Grant
    Filed: May 4, 2011
    Date of Patent: June 23, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Yasuhiko Takemura
  • Patent number: 9059426
    Abstract: An organic light emitting display device can prevent a voltage dropping in a cathode electrode. The organic light emitting display device includes a substrate, cathode wiring arranged on a surface of the substrate, an anode electrode arranged on the substrate and electrically insulated from the cathode wiring, an organic layer arrangement arranged on the anode electrode to form a plurality of unit pixels, a cathode electrode covering the organic layer arrangement and at least one electrical connection unit to electrically connect the cathode wiring to the cathode electrode.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: June 16, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Chi-Wook An
  • Patent number: 9030105
    Abstract: A light-emitting device according to one embodiment of the present invention includes a light-emitting element, a first transistor whose source is electrically connected to an anode of the light-emitting element, a second transistor which controls whether an image signal is input to a gate of the first transistor, a third transistor which controls electrical connection and disconnection between the gate and a drain of the first transistor, a fourth transistor which controls whether a first power supply potential is supplied to the drain of the first transistor, a fifth transistor which controls whether a second power supply potential is supplied to the anode of the light-emitting element, a first capacitor which holds a voltage between the gate and the source of the first transistor, and a second capacitor electrically connected in series with the first capacitor and electrically connected in series with the light-emitting element.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 12, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Jun Koyama
  • Patent number: 9013377
    Abstract: There is provided an active matrix EL display device that can display a clear multi gray-scale color display to reduce the shift in the potential caused by the potential drop due to the wiring resistance of a power source supply line, in order to decrease the unevenness in a display region. A plurality of drawing out ports of the power source supply line are arranged. Further, in the wiring resistance between the external input terminal and the pixel portion power source supply line, potential compensation is performed by supplying potential to the power source supply line by a feedback amplifier. Further, in addition to above structure, the power source supply line may be arranged in a matrix.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: April 21, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Jun Koyama, Hajime Kimura
  • Patent number: 9013371
    Abstract: A display apparatus including a light emitting body to improve external appearance thereof. The light emitting body is disposed inside a bezel to emit light. The bezel has a reflective surface to reflect light emitted from the light emitting body in front of the display apparatus. The bezel also has a light interruption groove to prevent light emitted from the light emitting body from affecting an image formed on the display module. The light emitting body is operatively connected to a user interface unit. A user manipulates a manipulation panel or a remote control to set an operation mode of the light emitting body from a menu item on an on screen display, and the light emitting body emits light in various forms based on the set mode.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: April 21, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Sung Soo Jung
  • Patent number: 9001104
    Abstract: A shift register circuit includes plural stages of shift registers. Each stage of shift register includes a pull-up circuit, a first driving circuit and a voltage-stabilizing circuit. The pull-up circuit is used for charging a first node. The first driving circuit is electrically connected with the first node. According to a voltage level of the first node, a corresponding control signal is outputted from an output terminal of the first driving circuit. The voltage-stabilizing circuit is electrically connected with the output terminal of the first driving circuit for stabilizing the control signal from the first driving circuit. Some circuits of some other shift registers are controlled according to the control signal.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: April 7, 2015
    Assignee: Au Optronics Corp.
    Inventors: Kuan-Yu Chen, Wei-Cheng Lin
  • Patent number: 9001098
    Abstract: A power supply system includes a control unit comprising a detecting and converting unit that is operable to generate a detected current based on a difference between a set voltage and a voltage representative of a current flow through an energy storage member.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: April 7, 2015
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myung-Ho Seo, Hee-Seok Han
  • Patent number: 8994704
    Abstract: A latch circuit includes an input transistor, a retention capacitor connected between an electrode of the input transistor and a first latch control line, a first transistor having an electrode connected to the first latch control line and a gate connected to the electrode of the input transistor, a second transistor having a gate connected to another electrode of the first transistor and an electrode is connected to the second latch control line, a third transistor having a gate connected to the another electrode of the first transistor and an electrode connected to another electrode of the second transistor and another electrode connected to an output terminal.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 31, 2015
    Assignee: Pixtronix, Inc.
    Inventors: Toshio Miyazawa, Mitsuhide Miyamoto
  • Patent number: 8975632
    Abstract: Semiconductor elements deteriorate or are destroyed due to electrostatic discharge damage. The present invention provides a semiconductor device in which a protecting means is formed in each pixel. The protecting means is provided with one or a plurality of elements selected from the group consisting of resistor elements, capacitor elements, and rectifying elements. Sudden changes in the electric potential of a source electrode or a drain electrode of a transistor due to electric charge that builds up in a pixel electrode is relieved by disposing the protecting means between the pixel electrode of the light-emitting element and the source electrode or the drain electrode of the transistor. Deterioration or destruction of the semiconductor element due to electrostatic discharge damage is thus prevented.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: March 10, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Masahiko Hayakawa, Yoshifumi Tanada, Mitsuaki Osame, Aya Anzai, Ryota Fukumoto
  • Patent number: 8947327
    Abstract: A display apparatus includes: a pixel array section including a row of scanning lines, a column of signal lines, and pixels in a matrix, each of the pixels disposed at an intersection of both of the lines; and a drive section. The drive section performs line progressive scanning on the pixels. The pixel includes a light emitting device, a sampling transistor, a driving transistor, a switching transistor, and a holding capacitor. The sampling transistor samples a video signal in the holding capacitor, the driving transistor changes the device to a luminous state, the switching transistor becomes ON in advance of the sampling of the video signal to change the light emitting device to a non-luminous state, and the sampling transistor takes in the OFF voltage from the signal line to the driving transistor, thereby preventing a penetration current from flowing from the power source toward the fixed potential.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: February 3, 2015
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8941314
    Abstract: In a light emitting device, luminance irregularities caused by fluctuation in threshold of TFTs for supplying a current to EL elements among pixels hinder the light emitting device from improving the image quality. A voltage equal to the threshold of a TFT 110 is held in capacitor means 111 in advance. When a video signal is inputted from a source signal line, the voltage held in the capacitor means is added to the signal, which is then applied to a gate electrode of the TFT 110. Even when threshold is fluctuated among pixels, each threshold is held in the capacitor means 111 of each pixel, and therefore, influence of the threshold fluctuation can be removed. Since the threshold is stored in the capacitor means 111 alone and the voltage between two electrodes is not changed while a video signal is written, fluctuation in capacitance value has no influence.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: January 27, 2015
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Patent number: 8922541
    Abstract: A method of driving a display device including pixels in a matrix and a power source, each pixel including a light-emitting element, drive transistor, capacitance element, and switching transistor, and connected to the power source by a power line, the method including: setting a voltage across the light-emitting element smaller than or equal to its threshold voltage by adjusting a voltage outputted by the power source to the power line; (a) applying, to a gate of the drive transistor, a reset voltage with which the gate-source voltage of the drive transistor becomes larger than its threshold voltage; (c) causing a data voltage to be held in the capacitive element; and (d) causing the light-emitting element to emit light according to the data voltage by setting the voltage across the light-emitting element larger than its threshold voltage by adjusting the voltage outputted by the power source to the power line.
    Type: Grant
    Filed: November 24, 2011
    Date of Patent: December 30, 2014
    Assignee: Panasonic Corporation
    Inventor: Shinya Ono
  • Patent number: 8917224
    Abstract: The present disclosure discloses a pixel unit circuit and an OLED display apparatus. The pixel unit circuit comprises a first sub-circuit module, a second sub-circuit module, a first capacitor and OLED. An input of the first sub-circuit module is connected to a data line; another input of the first sub-circuit module is connected to an output of the second sub-circuit module and a first terminal of the OLED; an output of the first sub-circuit module is connected to an input/output of the second sub-circuit module via the first capacitor; a voltage difference between positive power supply and negative power supply of a backboard is applied between an input of the second sub-circuit module and a second terminal of the OLED. The pixel unit circuit can compensate the aging of OLED devices, the non-uniformity of threshold voltage of TFT driving transistors, and IR Drop of the power supply of the backboard.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: December 23, 2014
    Assignee: Boe Technology Group Co., Ltd.
    Inventors: Zhongyuan Wu, Liye Duan, Gang Wang, Tian Xiao
  • Patent number: 8907875
    Abstract: The invention provides a pixel circuit that can cancel the influence of the mobility of a drive transistor. A drive transistor supplies a light-emitting element with an output current dependent upon an input voltage. The light-emitting element emits light with a luminance dependent upon a video signal in response to the output current supplied from the drive transistor. The pixel circuit includes a correction unit that corrects the input voltage held by a capacitive part in order to cancel the dependence of the output current on the carrier mobility.
    Type: Grant
    Filed: August 14, 2014
    Date of Patent: December 9, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8902134
    Abstract: The invention provides a pixel circuit that can cancel the influence of the mobility of a drive transistor. A drive transistor supplies a light-emitting element with an output current dependent upon an input voltage. The light-emitting element emits light with a luminance dependent upon a video signal in response to the output current supplied from the drive transistor. The pixel circuit includes a correction unit that corrects the input voltage held by a capacitive part in order to cancel the dependence of the output current on the carrier mobility.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: December 2, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8890782
    Abstract: A drive section sequentially supplies respective scanning lines with a control signal and supplies respective signal lines with a video signal to carry out a correction operation for holding a voltage equivalent to a threshold voltage of a drive transistor in a holding capacitance, and subsequently performs a write operation for writing the video signal in the holding capacitance, and before the correction operation, the drive section switches potentials at the bias line and adds a coupling voltage to one current terminal of the drive transistor via an auxiliary capacitance to carry out a preparation operation for an initialization to set a potential difference between a control terminal and the one current terminal of the drive transistor larger than the threshold voltage.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: November 18, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8884850
    Abstract: Disclosed herein is a display apparatus including a pixel array and a driver, the pixel array including rows of scanning lines, rows of feeding lines, columns of signal lines, and a matrix of pixels disposed at the crossings of the scanning lines and the signal lines, the driver including a write scanner for supplying a control signal successively to the scanning lines, a power supply scanner for switching each of the feeding lines between a high potential, a low potential, and an intermediate potential between the high potential and the low potential, and a signal selector for supplying a video signal, which alternately switches between a signal potential and a reference potential, to each of the signal lines.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8884847
    Abstract: A display apparatus disclosed herein includes a plurality of pixel circuits, each having a plurality of switches configured to receive a driving signal of a predetermined period and to be controlled for opening and closing operation by the driving signal, a drive circuit configured to control the open/closed state of the switches, being operable to scan the pixel circuits and open and close the switches in periods independent of each other.
    Type: Grant
    Filed: March 24, 2008
    Date of Patent: November 11, 2014
    Assignee: Sony Corporation
    Inventors: Mitsuru Asano, Takao Tanikame
  • Patent number: 8872810
    Abstract: A method includes providing an input signal identifying a desired brightness for one or more LEDs to first and second parallel control paths. The method also includes generating a digital modulation control signal using the first control path, generating a current control signal using the second control path, and driving the one or more LEDs using the control signals. The method further includes performing compensation in at least one of the control paths to compensate for an increased efficiency of the one or more LEDs. Generating the control signals could include (i) adjusting the digital modulation control signal while maintaining the current control signal at a substantially constant value for a range of lower LED brightness values and (ii) adjusting the current control signal while maintaining the digital modulation control signal at a maximum value or within a range of maximum values for a range of higher LED brightness values.
    Type: Grant
    Filed: October 12, 2010
    Date of Patent: October 28, 2014
    Assignee: National Semiconductor Corporation
    Inventors: Ari K. Väänänen, Mauri K. Määttä, T. Tapani Tuikkanen
  • Patent number: 8872741
    Abstract: An organic light emitting display includes a first pixel region including pixels coupled to odd scan lines and odd data lines, a second pixel region including pixels coupled to even scan lines and the odd data lines, a third pixel region including pixels coupled to the odd scan lines and even data lines, a fourth pixel region including pixels coupled to the even scan lines and the even data lines, a data analyzing unit for dividing input screen data of one frame into the pixel regions, a scan driver for sequentially supplying scan signals to the odd scan lines twice and for sequentially supplying scan signals to the even scan lines twice in one frame, and a data driver for supplying data signals corresponding to the screen data divided by the data analyzing unit to the pixel regions through the data lines.
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: October 28, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Min-Cheol Kim
  • Patent number: 8841857
    Abstract: A driving circuit includes a plurality of light-emitting units, a plurality of switches, and a bias current module, wherein the light-emitting units are coupled with each other in series and are driven with an input voltage varying according to a frequency. Each switch has a reference voltage and a critical activation voltage and includes a light-emitting end and a bias end opposite to the light-emitting end, wherein the light-emitting end is coupled with the light-emitting units, and the bias ends of the switches are coupled with each other. The bias current module is coupled with the bias ends of the switches and has an operating bias voltage varying according to the frequency, wherein each switch is driven to be activated or to be deactivated according to a relation of the critical activation voltage and a difference between the reference voltage and the operating bias voltage.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: September 23, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih-Wei Chu, Yung-Hsiang Yang, Shu-Kuang Chou
  • Patent number: 8842059
    Abstract: A display system including at least one pixel is disclosed. The pixel includes a switching unit and a controlling unit. The switching unit controls a level of a first node. The controlling unit controls a level of a second node. During a first period, the level of the first node equals to a first reference level and the level of the second node equals to a second reference level. During a second period, the level of the first node equals to a third reference level and the voltage difference between the first and the second nodes equals to a threshold voltage of a driving unit. During a third period, the level of the first node equals to a data signal. During a fourth period, the driving unit lights a luminescence unit according to the voltage difference between the first and the second nodes.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: September 23, 2014
    Assignee: Innolux Corporation
    Inventors: Shou-Cheng Wang, Tse-Yuan Chen, Du-Zen Peng
  • Patent number: 8823610
    Abstract: A gate of a driving transistor is set to a offset level corresponding to the threshold of the driving transistor by an initializing current flowing between a source and a drain of the driving transistor or a compensating transistor for the driving transistor. A conduction state of the driving transistor is set according to a gate voltage of the gate of the driving transistor that corresponds to a data signal and the threshold of the driving transistor. A current of which a level corresponds to the conduction state and of which the direction is opposite to the direction of the initializing current flows through driving transistor.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: September 2, 2014
    Assignee: Seiko Espon Corporation
    Inventor: Takashi Miyazawa
  • Patent number: 8816941
    Abstract: A display device includes a scan driver transmitting a plurality of scan signals to a plurality of scan lines, a data driver transmitting a plurality of data signals to a plurality of data lines, a display unit including a plurality of pixels connected to corresponding scan lines and corresponding data lines, and respectively receiving the corresponding data signal when the plurality of pixels are selected with the corresponding scan signal, and a timing controller controlling the scan driver and the data driver, dividing one frame period into a first viewpoint image display period, a second viewpoint image display period, and a black image display period, and generating image data signals corresponding to the first viewpoint image display period, the second viewpoint image display period, and the black image display period, and supplying the respective image data signals to the data driver, wherein the black image display period is shorter than the first viewpoint image display period and the second viewpoin
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: August 26, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Do-Ik Kim
  • Patent number: 8810486
    Abstract: An active-matrix display device employs current-programmed-type pixel circuits and performs the writing data to each of pixels on a line-by-line basis. The active-matrix display device having a matrix of current-programmed-type pixel circuits includes a data line driving circuit 15 formed of m current driving circuits (CD) 15-1 to 15-m arranged-corresponding to respective data lines 13-1 to 13-m. The data line driving circuit (CD) 15-1 to 15-m holds image data (luminance data herein) in the form of voltage, and then converts the voltage of the image data into a current signal. The current signal is then fed to the data lines 13-1 to 13-m at a time. The image information is thus written on the pixel circuits 11.
    Type: Grant
    Filed: August 13, 2013
    Date of Patent: August 19, 2014
    Assignee: Sony Corporation
    Inventor: Akira Yumoto
  • Patent number: 8810162
    Abstract: An LED driver IC for driving external strings of LEDs comprises a prefix register and a data register connected in series with each other and with the prefix and data registers in other driver ICs. The prefix and data registers of the driver ICs are connected in a daisy chain arrangement with an interface IC. The interface IC loads data identifying a functional latch into the prefix register and data defining a functional condition into the data register of each driver IC. The data in the data register is then transferred to the functional latch to control the functional condition within the LED driver IC.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: August 19, 2014
    Assignee: Advanced Analogic Technologies, Inc.
    Inventors: Richard Kent Williams, Kevin D'Angelo, David A. Brown
  • Patent number: 8810555
    Abstract: Method, apparatus and systems for driving electroluminescent segments in electroluminescent displays are disclosed. Each segment in the display receives a series of first pulses alternating in polarity at a first electrode and a series of second pulses at a second electrode. Each of the second pulses corresponds to one of the first pulses and is opposite in polarity. The width of the second pulses corresponds to the parasitic resistance of the segment.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: August 19, 2014
    Assignee: Scobil Industries Corp.
    Inventors: William Joseph Pietro, Scott Stephen Fielder
  • Patent number: 8786522
    Abstract: A display device includes a scan driver transmitting a plurality of scan signals to a plurality of scan lines, a data driver transmitting a plurality of data signals to a plurality of data lines, a display unit including a plurality of pixels connected to corresponding scan lines and corresponding data lines, and respectively receiving the corresponding data signal when the plurality of pixels are selected with the corresponding scan signal, and a timing controller controlling the scan driver and the data driver, dividing one frame period into a first viewpoint image display period, a second viewpoint image display period, and a black image display period, and generating image data signals corresponding to the first viewpoint image display period, the second viewpoint image display period, and the black image display period, and supplying the respective image data signals to the data driver, wherein the black image display period is shorter than the first viewpoint image display period and the second viewpoin
    Type: Grant
    Filed: January 12, 2011
    Date of Patent: July 22, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Do-Ik Kim
  • Patent number: 8786216
    Abstract: An LED driver IC for driving external strings of LEDs comprises a prefix register and a data register connected in series with each other and with the prefix and data registers in other driver ICs. The prefix and data registers of the driver ICs are connected in a daisy chain arrangement with an interface IC. The interface IC loads data identifying a functional latch into the prefix register and data defining a functional condition into the data register of each driver IC. The data in the data register is then transferred to the functional latch to control the functional condition within the LED driver IC.
    Type: Grant
    Filed: January 10, 2012
    Date of Patent: July 22, 2014
    Assignee: Advanced Analogic Technologies, Inc.
    Inventors: Richard Kent Williams, Kevin D'Angelo, David A. Brown
  • Patent number: 8780018
    Abstract: The present invention is to provide a light emitting device capable of obtaining a certain luminance without influence by the temperature change, and a driving method thereof. A current mirror circuit formed by using a transistor is provided for each pixel. The first transistor and the second transistor of the current mirror circuit are connected such that the drain currents thereof are maintained at proportional values regardless of the load resistance value. Thereby, a light emitting device capable of controlling the OLED driving current and the luminance of the OLED by controlling the drain current of the first transistor at a value corresponding to a video signal in a driving circuit, and supplying the drain current of the second transistor to the OLED, is provided.
    Type: Grant
    Filed: February 16, 2012
    Date of Patent: July 15, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Jun Koyama
  • Patent number: 8780021
    Abstract: A pixel, a display device using the pixel and a method of driving the display device are provided. The pixel may include an organic light emitting diode, a driving circuit for generating and transmitting driving current depending on data signals to the organic light emitting diode, and at least one switch connected between a power wire for applying a first voltage to the organic light emitting diode and a data line for transmitting the data signals. The at least one switch may include a compensating circuit for electronically connecting the power wire to the data line for a predetermined period to transmit the first voltage through the data line.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: July 15, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Myeon Han
  • Patent number: 8779696
    Abstract: An LED driver IC for driving external strings of LEDs comprises a prefix register and a data register connected in series with each other and with the prefix and data registers in other driver ICs. The prefix and data registers of the driver ICs are connected in a daisy chain arrangement with an interface IC. The interface IC loads data identifying a functional latch into the prefix register and data defining a functional condition into the data register of each driver IC. The data in the data register is then transferred to the functional latch to control the functional condition within the LED driver IC.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: July 15, 2014
    Assignee: Advanced Analogic Technologies, Inc.
    Inventors: Richard Kent Williams, Kevin D'Angelo, David A. Brown
  • Patent number: 8773335
    Abstract: A display device is disclosed. The display device includes: a pixel array unit and a driving unit which drives the pixel array unit. The pixel array unit includes rows of first scanning lines and second scanning lines, columns of signals, pixels in a matrix state arranged at portions where the scanning lines and the signal lines cross each other and power supply lines and ground lines supplying power to respective pixels. The driving unit includes a first scanner performing line-sequential scanning to pixels by each row by supplying a first control signal to each first scanning line sequentially, a second scanner supplying a second control signal to each second scanning line sequentially so as to correspond to the line-sequential scanning and a signal selector supplying a video signal to rows of signal lines so as to correspond to the line-sequential scanning.
    Type: Grant
    Filed: October 18, 2013
    Date of Patent: July 8, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Takao Tanikame, Katsuhide Uchino
  • Patent number: 8759825
    Abstract: A light emitting device and an element substrate which are capable of suppressing variations in the luminance intensity of a light emitting element among pixels due to characteristic variations of a driving transistor without suppressing off-current of a switching transistor low and increasing storage capacity of a capacitor. According to the invention, a depletion mode transistor is used as a driving transistor. The gate of the driving transistor is fixed in its potential or connected to the source or drain thereof to operate in a saturation region with a constant current flow. A current controlling transistor which operates in a linear region is connected in series to the driving transistor, and a video signal for transmitting a light emission or non-emission of a pixel is inputted to the gate of the current controlling transistor through a switching transistor.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: June 24, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Mitsuaki Osame, Aya Anzai, Yu Yamazaki
  • Patent number: 8754882
    Abstract: Compensate for the variations of threshold voltage of a driving transistor. During the period of the reference signal voltage Vref being set to the signal line DTC, voltage between the gate and source of the driving transistor 10C is made equal to or greater than the threshold voltage of the driving transistor 10C, and the difference in voltage of the reference signal voltage Vref and the reference power supply voltage Vref_r is charged to the retentive capacitance 10B. At the same time, the voltage of the source of the said driving transistor 10C is set to the reference power supply voltage Vref_r to make the voltage applied to the light emitting element 10E equal to or lower than its threshold voltage, a voltage corresponding to the threshold voltage of the driving transistor 10C is held in the retentive capacitance 10B.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: June 17, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Yuichi Maekawa, Koichi Miwa
  • Patent number: 8754852
    Abstract: Disclosed are a light guide plate for a non-contact type coordinate input system, a system including the same, and a non-contact type coordinate input method using the same. More particularly, the present invention relates to a light guide plate for a non-contact type coordinate input system, which eliminates inconvenience of a conventional contact-type coordinate input system inputting coordinates through direct contact, and which can reduce use of sensors and optical loss as much as possible. The present invention also relates to a system including the same, and a non-contact type coordinate input method using the same.
    Type: Grant
    Filed: August 10, 2007
    Date of Patent: June 17, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Yeon-Keun Lee, Sang-Hyun Park, Hyun-Seok Choi, Jung-Doo Kim, Su-Rim Lee
  • Patent number: 8749745
    Abstract: An organic electroluminescent device comprises: a substrate; a display unit located on the substrate and including a plurality of subpixels; a sealing region located at the outer periphery of the display unit and defined to form a sealing member; and a plurality of wiring lines connected to the display unit and disposed on the lateral side of the display unit, some of the plurality of wiring lines are respectively divided into two or more in the sealing region.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: June 10, 2014
    Assignee: LG Display Co. Ltd.
    Inventors: Hongki Park, Woochan Kim, Hongseok Choi
  • Patent number: 8743027
    Abstract: An OLED driving circuit is provided. The OLED driving circuit comprises a switch transistor, a storage capacitor, a driving transistor and a control module. In a charging time period, a charging switch of the control module is conducted to connect the storage capacitor and a first voltage end and a data signal is transmitted from the switch transistor to the storage capacitor. In a memory time period, a memory switch of the control module is conducted to connect the storage capacitor and an OLED and the data signal is transmitted from the switch transistor to the storage capacitor. In a light-emitting time period, three light-emitting switches are conducted to connect the driving transistor to the storage capacitor, the first voltage end and the OLED.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: June 3, 2014
    Assignee: E Ink Holdings Inc.
    Inventors: Chi-Liang Wu, Po-Hsin Lin, Chin-Wen Lin, Ted-Hong Shinn
  • Patent number: 8736521
    Abstract: A display device includes a pixel array portion in which sub-pixels each including an electro-optic element, a write transistor for writing a video signal, a hold capacitor for holding the video signal written by the write transistor, and a drive transistor for driving the electro-optic element in accordance with the video signal held in the hold capacitor are disposed in a matrix, and each unit pixel is composed of the plurality of adjacent sub-pixels belonging to a plurality of rows. The display device further includes power source supply lines through which power source potentials different in potential from one another are selectively supplied to the drive transistors. One power source supply line is wired every plural rows.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: May 27, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8723762
    Abstract: In an example embodiment, a display apparatus includes a substrate having wiring lines formed by a conductor film including signal and scanning lines arranged in columns and rows, and a matrix of pixels, and includes a light-emitting material interposed between an anode and cathode electrode and a first and second uneven zone are between the anode electrode of the pixel and an adjacent pixel. The first uneven zone is formed on the substrate due to level differences resulting from the presence of the scanning lines. The second uneven zone is formed on the substrate also due to level differences resulting from the presence of the scanning lines. A pattern of the conductor film of which the wiring lines are made is formed so part of recessed portions of the first uneven zone are located behind their corresponding raised portions of the second uneven zone, as viewed from inside the pixel.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: May 13, 2014
    Assignee: Sony Corporation
    Inventors: Katsuhide Uchino, Tetsuro Yamamoto