Patents Assigned to Global OLED Technology LLC
  • Patent number: 8816943
    Abstract: In order to efficiently execute threshold value compensation for a driving transistor, a coupling capacitor has one end connected to a data line. Another end of the coupling capacitor is connected to a selection transistor and one end of a reset transistor. A control terminal of a driving transistor is connected to the other end of the selection transistor, and an organic EL element is connected to this driving transistor via a light emission control transistor. A data voltage, corresponding to a gradation signal supplied to the data line, is written to a storage capacitor via the coupling capacitor, and with the selection transistor and the light emission control transistor in an off state and the reset transistor turned on, a compensation voltage corresponding to a degree of mobility of the driving transistor is written to the coupling capacitor.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: August 26, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Kazuyoshi Kawabe
  • Publication number: 20140218417
    Abstract: A display device which effectively reduces the occurrences of a false contour is provided. A driver digitally drives each pixel by obtaining a plurality of bit data from pixel data for one pixel to assign the plurality of bit data to a corresponding subframe; configuring one frame with a predetermined number of unit frames; and supplying corresponding bit data in each unit frame to each pixel. Specifically, an analyzing circuit 5-5 predicts a probability of occurrence of a false contour in one screen of the video signal based on the presence or absence of a true contour. A display method based on the video signal is set in accordance with an analysis result.
    Type: Application
    Filed: April 4, 2014
    Publication date: August 7, 2014
    Applicant: GLOBAL OLED TECHNOLOGY LLC
    Inventor: Kazuyoshi KAWABE
  • Patent number: 8796700
    Abstract: An emissive device includes a substrate having a substrate surface; a chiplet adhered to the substrate surface, the chiplet having one or more connection pads; a bottom electrode formed on the substrate surface, one or more organic or inorganic light-emitting layers formed over the bottom electrode, and a top electrode formed over the one or more organic or inorganic light-emitting layers; an electrical conductor including a transition layer formed over only a portion of the chiplet and only a portion of the substrate surface, the transition layer exposing at least one connection pad, the electrical conductor formed in electrical contact with the exposed connection pad and the bottom electrode; and an LED spaced from the chiplet and including a layer of light-emissive material formed over the bottom electrode and a top electrode formed over the light-emissive layer.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: August 5, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Ronald S. Cok, John W. Hamer
  • Patent number: 8795855
    Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light-emitting layer wherein the light-emitting layer comprises (a) a 2-arylanthracene compound and (b) a light-emitting second anthracene compound having amino substitution at a minimum of two positions, wherein at least one amine is substituted at the 2 position of the second anthracene compound.
    Type: Grant
    Filed: January 30, 2007
    Date of Patent: August 5, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Kevin P. Klubek, Liang-Sheng Liao, Viktor V. Jarikov, Denis Y. Kondakov, William J. Begley, Michele L. Ricks
  • Publication number: 20140184478
    Abstract: To reduce the number of sub-frames and perform high resolution display with low power consumption, each of the pixels has a digital emission period Td and an analog emission period Ta, and is driven in a time-divided fashion in a digital manner or in an analog manner. Each of the pixels performs high resolution display when being driven in an analog manner, and performs display with low power consumption when being driven in a digital manner.
    Type: Application
    Filed: February 14, 2014
    Publication date: July 3, 2014
    Applicant: GLOBAL OLED TECHNOLOGY LLC
    Inventor: Kazuyoshi Kawabe
  • Publication number: 20140176006
    Abstract: An EL light-emitting element is driven digitally to reduce power consumption using a pixel having three transistors and two capacitors. A reset transistor for diode connection writes the threshold voltage of the drive transistor onto a coupling capacitor. The data voltage plus threshold voltage is then written onto the gate of the drive transistor. This reduces the amplitude of the data voltage required, further reducing power consumption.
    Type: Application
    Filed: February 20, 2014
    Publication date: June 26, 2014
    Applicant: Global OLED Technology LLC
    Inventor: Kazuyoshi Kawabe
  • 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
  • Publication number: 20140151676
    Abstract: An OLED device comprises a cathode, an anode, and has therebetween a light-emitting layer wherein the light-emitting layer comprises (a) a 2-arylanthracene compound and (b) a light-emitting second anthracene compound having amino substitution at a minimum of two positions, wherein at least one amine is substituted at the 2 position of the second anthracene compound.
    Type: Application
    Filed: February 7, 2014
    Publication date: June 5, 2014
    Applicant: Global OLED Technology LLC
    Inventors: Kevin P. Klubek, Liang-Sheng Liao, Viktor V. Jarikov, Denis Y. Kondakov, William J. Begley, Michele L. Ricks
  • Patent number: 8736525
    Abstract: In order to efficiently execute threshold value compensation for a driving transistor, a coupling capacitor (6) has one end connected to a data line (8). Another end of the coupling capacitor (6) is connected to a selection transistor (3) and one end of a reset transistor (4). A control terminal of a driving transistor (2) is connected to the other end of the selection transistor (3), and an organic EL element (1) is connected to this driving transistor via a light emission control transistor (5). A data voltage, corresponding to a gradation signal supplied to the data line (8), is written to a storage capacitor (7) via the coupling capacitor (6), and with the selection transistor (3) and the light emission control transistor (5) in an off state and the reset transistor (4) turned on, a compensation voltage corresponding to a degree of mobility of the driving transistor (2) is written to the coupling capacitor (6).
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: May 27, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Kazuyoshi Kawabe
  • Patent number: 8730276
    Abstract: A display device which effectively reduces the occurrences of a false contour is provided. A driver digitally drives each pixel by obtaining a plurality of bit data from pixel data for one pixel to assign the plurality of bit data to a corresponding subframe; configuring one frame with a predetermined number of unit frames; and supplying corresponding bit data in each unit frame to each pixel. Specifically, an analyzing circuit 5-5 predicts a probability of occurrence of a false contour in one screen of the video signal based on the presence or absence of a true contour. A display method based on the video signal is set in accordance with an analysis result.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 20, 2014
    Assignee: Global OLED Technology, LLC.
    Inventor: Kazuyoshi Kawabe
  • Publication number: 20140124012
    Abstract: An apparatus (10) for radiant energy transfer has at least one radiant energy transfer panel (20) having a light-energy transfer surface (21) and a back surface (23). The back surface has a panel electrode (42) for an electrical connection with the at least one radiant energy transfer panel. The panel electrode is conductively coupled to a first member of a separable flexible conductive fastener. A second member of the separable flexible conductive fastener has a power connection electrode. The power connection electrode is conductively coupled to a power device (12). Mechanically engaging the first and second members of the separable flexible conductive fastener connects the panel electrode on the at least one radiant energy transfer panel to the power connection electrode.
    Type: Application
    Filed: January 15, 2014
    Publication date: May 8, 2014
    Applicant: GLOBAL OLED TECHNOLOGY LLC
    Inventor: Barry D. Silverstein
  • Patent number: 8711138
    Abstract: A pixel circuit for an electroluminescent element with a first storage capacitor formed overlapping a data line and which comprises a section where a semiconductor thin film constituting the switching transistor or the reset transistor extends, an insulating film, and a metal layer which is connected to the data line as a first terminal. A first terminal of a switching transistor and a first terminal of a reset transistor are connected to the second terminal of the first storage capacitor. The second terminal of the switching transistor is connected to a driving transistor. A second storage capacitor connects the control terminal and the first terminal of the switching transistor. The electroluminescent element is connected to the second terminal of the driving transistor through a light emission controlling transistor.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: April 29, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Kazuyoshi Kawabe
  • Patent number: 8698391
    Abstract: A display device includes a substrate having a display area; two or more column-driver chiplets having connection pads, each column-driver chiplet having a long axis and located over the substrate in the display area, the long axis of each column-driver chiplet oriented in a row direction; one or more row-driver chiplets having connection pads, each row-driver chiplet having a long axis and located over the substrate in the display area, the long axis of each row-driver chiplet oriented in a column direction different from the row direction; and a first common buss extending over the display area in the row direction connected to a connection pad on each of the row-driver chiplets, the first common buss further including one or more electrically connected first buss portions oriented in the column direction, each first buss portion electrically connected to a connection pad of a respective column-driver chiplet.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: April 15, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Ronald S. Cok
  • Patent number: 8674911
    Abstract: An electroluminescent (EL) device with aging compensation has a luminance and a chromaticity that both correspond to the density of the current and the age of the EL emitter. Different black, first and second current densities are selected based on the measured age, each corresponding to emitted light colorimetrically distinct from the light emitted at the other two current densities. Respective percentages of a selected emission time are calculated for each current density to produce a designated luminance and chromaticity. The current densities are provided to the EL emitter for the calculated respective percentages of the emission time so that the integrated light output of the EL emitter during the selected emission time is colorimetrically indistinct from the designated luminance and chromaticity, no matter the age of the EL emitter.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: March 18, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Christopher J. White
  • Patent number: 8665247
    Abstract: A flat panel display includes a flexible substrate; a passive matrix display having an array of pixels formed on a side of the flexible substrate, and row and column electrodes formed on the same side of the flexible substrate and connected to the pixels for providing data and selection signals to the pixel elements; a plurality of electrical contacts formed on the same side of the substrate and electrically connected to the row and column electrodes; and discrete data and selection drivers located on the same side of the flexible substrate around the periphery of the passive matrix display and electrically connected to the electrical contacts for driving the pixels of the passive matrix display.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: March 4, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Ronald S. Cok
  • Patent number: 8665295
    Abstract: An electroluminescent (EL) panel with 2T1C subpixels is compensated for initial nonuniformity (“mura”). The current of each subpixel is measured at a selected time to provide a status signal representing the characteristics of the subpixel. A compensator receives a linear code value and changes it according to the status signals. A linear source driver drives the panel with the changed code values.
    Type: Grant
    Filed: November 20, 2008
    Date of Patent: March 4, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Felipe A. Leon, Christopher J. White, Gary Parrett, Bruno Primerano
  • Patent number: 8638277
    Abstract: To compensate for a change of light emission intensity caused by deterioration of a light emitting element, provided is a display device including a drive element (T1) which controls a drive current to be supplied to a light emitting element (EL) in accordance with a data signal representing a target luminance of the light emitting element (EL). The light emitting element (EL) emits light in accordance with a current flowing through the light emitting element (EL). The data signal is corrected in accordance with a voltage applied at both terminals of the light emitting element (EL) so that the drive current to be supplied to the light emitting element (EL) increases with an increase in an amount of a voltage drop of the light emitting element (EL).
    Type: Grant
    Filed: February 3, 2011
    Date of Patent: January 28, 2014
    Assignee: Global OLED Technology LLC
    Inventor: Koichi Miwa
  • Patent number: 8629864
    Abstract: A display device in which a plurality of pixels are arranged in a matrix form, corresponding to intersections of a plurality of data lines and a plurality of scan lines, wherein each pixel includes a light emitting element having a first electrode connected to a first power supply and which emits light according to a current that flows; a driving transistor having a source electrode connected to a second power supply and which supplies a drain current to a second electrode of the light emitting element; a data storage capacitor having a first electrode connected to a gate electrode of the driving transistor; and a first switch which is switched ON during a pixel selection period so that data of a data line is written to the data storage capacitor, and wherein a potential of a second electrode of the data storage capacitor is changed.
    Type: Grant
    Filed: October 8, 2008
    Date of Patent: January 14, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Koichi Miwa, Yuichi Maekawa
  • Patent number: 8624882
    Abstract: A digital display device includes a display substrate; an array of pixels formed on the display substrate; an array of driving circuits located on the display substrate, each driving circuit electrically connected to one or more pixels for controlling a pixel current provided to each pixel; an array of computing circuits located on the display substrate, each computing circuit including circuits for signal or image processing and for communicating with neighboring computing circuits; a plurality of electrical conductors formed on the display substrate and connected to each of the driving circuits and digital computing circuits, wherein each computing circuit is connected with an electrical conductor to each of its neighbors in the array of computing circuits; and means for providing an image signal connected to one or more of the electrical conductors.
    Type: Grant
    Filed: February 10, 2011
    Date of Patent: January 7, 2014
    Assignee: Global OLED Technology LLC
    Inventors: Ronald S. Cok, John W. Hamer, Michael E. Miller
  • Patent number: 8619008
    Abstract: A display device includes a substrate, a plurality of pixels formed over the substrate, each pixel including two or more sub-pixels, the plurality of pixels defining a display area, and a plurality of chiplets located over the substrate in the display area, each chiplet controlling sub-pixels of at least two adjacent pixels.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: December 31, 2013
    Assignee: Global OLED Technology LLC
    Inventor: Ronald S. Cok