Electroluminescent Patents (Class 345/45)
  • Patent number: 10403703
    Abstract: A display device having a reduced frame width and a shape that is not significantly different from the shape of a display region is provided even in the case where the display region is non-rectangular. The display device includes a display region and a terminal electrode. The terminal electrode overlaps with the display region and is electrically connected to an external electrode through the non-display side of the display region.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: September 3, 2019
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Shunpei Yamazaki
  • Patent number: 10347698
    Abstract: An organic EL device as an electrooptical device includes an organic EL element, a sealing member, a color filter, a dimension evaluation pattern, and a pedestal member. The organic EL element is disposed for each subpixel, in a display area of a base as a substrate. The sealing member includes a sealing layer that covers the organic EL element. The color filter is provided on the sealing layer. The dimension evaluation pattern is provided as an evaluation pattern for evaluating the color filter. The pedestal member is disposed between an end portion of the base and the sealing member. The dimension evaluation pattern is disposed on the pedestal member.
    Type: Grant
    Filed: March 8, 2018
    Date of Patent: July 9, 2019
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Naotaka Kubota, Takeshi Koshihara
  • Patent number: 10288944
    Abstract: A display may have an active area surrounded by a border area. The display may be a liquid crystal display having a liquid crystal layer sandwiched between a color filter layer and a thin-film transistor layer. The liquid crystal layer may be retained within the display using a ring of sealant that is dispensed along the border area on the thin-film transistor layer. The thin-film transistor layer may include at least a substrate, a dielectric layer formed over the substrate, a first planarization layer formed on the dielectric layer, and a second planarization layer formed on the first planarization layer. A first continuous trench structure may be formed along the border of the display to help prevent moisture seepage. A second trench structure that is separate from the first trench structure may be formed along the border of the display to help provide proper sealant adhesion.
    Type: Grant
    Filed: October 26, 2015
    Date of Patent: May 14, 2019
    Assignee: Apple Inc.
    Inventors: Abbas Jamshidi Roudbari, Shih-Hung Yeh, Ting-Kuo Chang
  • Patent number: 10263213
    Abstract: A display device including a first substrate including a display area that displays an image and a peripheral area, in which no image is displayed, surrounding the display area. The display device further includes a plurality of pixels disposed in the display area. The display device additionally includes a first metal layer disposed above the first substrate in the peripheral area, and the first metal layer including a plurality of openings. The display device further includes a sealant disposed above the first metal layer, and surrounding the plurality of pixels. The display device additionally includes a plurality of second metal layers disposed above the first substrate and below the first metal layer in the peripheral area, and respectively overlapping the openings of the first metal layer. A part of the sealant is disposed in the plurality of openings.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: April 16, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Moo Soon Ko, Young Woo Park, Il Jeong Lee, Sang-Mok Hong
  • Patent number: 10158005
    Abstract: An object is to prevent an impurity such as moisture and oxygen from being mixed into an oxide semiconductor and suppress variation in semiconductor characteristics of a semiconductor device in which an oxide semiconductor is used. Another object is to provide a semiconductor device with high reliability. A gate insulating film provided over a substrate having an insulating surface, a source and a drain electrode which are provided over the gate insulating film, a first oxide semiconductor layer provided over the source electrode and the drain electrode, and a source and a drain region which are provided between the source electrode and the drain electrode and the first oxide semiconductor layer are provided. A barrier film is provided in contact with the first oxide semiconductor layer.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: December 18, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Kengo Akimoto, Shunpei Yamazaki
  • Patent number: 10069105
    Abstract: An organic light-emitting display apparatus includes a first substrate including a display area and a peripheral area; a second substrate opposing the first substrate; an insulating layer disposed on the first substrate and including one or more openings; and a sealing member interconnecting the first substrate and the second substrate to each other and interposed between the first and second substrates. The one or more openings are disposed between a first conductive layer disposed on the display area and a second conductive layer disposed on the peripheral area. The one or more openings are at least partially or entirely filled with the sealing member.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: September 4, 2018
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sangmin Hong, Jungi Youn, Goeun Lee
  • Patent number: 9807898
    Abstract: A method of manufacturing a display device includes forming on a first substrate a display element and a metal layer surrounding the display element, the metal layer including a first portion having a first width and a second portion having a second width less than the first width, forming on a second substrate a sealing member surrounding the display element, the sealing member including a first sealing portion having a first forming width and a second sealing portion having a second forming width greater than the first forming width, arranging the first substrate and the second substrate such that the sealing member on the second substrate faces the first substrate, the first sealing portion overlaps the first portion of the metal layer, and the second sealing portion overlaps the second portion of the metal layer, and sealing the first and second substrates by melting and curing the sealing member.
    Type: Grant
    Filed: January 13, 2015
    Date of Patent: October 31, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Goeun Lee, Sangmin Hong
  • Patent number: 9651835
    Abstract: A display panel (100A) includes a display region (DA) including a plurality of pixel regions and a frame region provided around the display region. The display region includes an organic insulating layer (22) provided on a display medium layer side of a pixel TFT. The frame region includes a seal portion (32), a driving circuit (30), and an extended portion of the organic insulating layer. The extended portion of the organic insulating layer is provided on a display medium layer side of driver TFTs (30A, 30B) and has at least one opening (22a) which is positioned outer than the driver TFTs and which reaches an underlayer. The seal portion (32) overlaps at least part of the driver TFTs and covers at least part of the at least one opening (22a) provided in the extended portion of the organic insulating layer.
    Type: Grant
    Filed: December 27, 2013
    Date of Patent: May 16, 2017
    Assignee: SHARP KABUSHIKI KAISHA
    Inventor: Hiroyuki Moriwaki
  • Patent number: 9570478
    Abstract: Provided is a flat panel display. A flat panel display includes: a lower panel defining a display area and a non-display area, a driver element and a line within the non-display area, a planar layer covering the lower panel, a first trench at the planar layer over the driver element and the line, a lower alignment layer on an upper surface of the planar layer and a lower surface of the first trench, the lower alignment layer exposing some upper surface of the planar layer at the first trench, and a sealant at the first trench.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: February 14, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Minjoo Kim, Kyoungjin Nam, Seongjoo Lee
  • Patent number: 9461098
    Abstract: An OLED device is disclosed. The device includes a substrate defined to have a first active area and a dummy area. First electrodes are formed on the substrate, and a first bank pattern is formed to overlap with edges of each first electrode and to expose a part of an upper surface of each first electrode. A second bank pattern is formed on the first bank pattern within the first active area, and a third bank pattern is formed on the first bank pattern within the dummy area in the same layer as the second bank pattern. The second bank pattern is formed to have a larger width than that of the third bank pattern. As such, an organic emission layer can be evenly formed in the active area.
    Type: Grant
    Filed: December 23, 2014
    Date of Patent: October 4, 2016
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Dae Jung Choi, Jae Ki Lee, Ki Soub Yang, Hong Myeong Jeon
  • Patent number: 9385343
    Abstract: An organic light-emitting diode display panel includes a substrate on which an OLED (organic light-emitting diode) light-emitting element is mounted. The OLED light-emitting element includes an OLED organic layer. A black silicon structure is disposed on the substrate and reveals the OLED organic layer. The black silicon structure absorbs ambient light to reduce the reflectance of the ambient light. By disposing the black silicon structure around the OLED organic layer or by directly forming the OLED organic layer in the black silicon structure, the extremely high light absorbing capability of the black silicon structure is used to significantly reduce the reflectance of the ambient light. A clear display effect in a bright environment can be achieved under smaller luminance, reducing the luminance of the display panel and saving the power consumption. Furthermore, the number of films and the overall thickness of the panel can be reduced.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: July 5, 2016
    Assignee: EverDisplay Optronics (Shanghai) Limited
    Inventor: Zheng Li
  • Patent number: 9331135
    Abstract: The present disclosure provides an organic light emitting display including: a first substrate including a display area where an organic light emitting device is formed and a non-display area where a plurality of pads are formed, a second substrate facing and spaced apart from the first substrate, a pattern formed in the non-display area of the first substrate and having openings, and an adhesive layer formed between the first substrate and the second substrate and covering a portion of the pattern.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: May 3, 2016
    Assignee: LG Display Co., Ltd.
    Inventors: HeeSuk Pang, Jaehyuk Lee, JooHwan Shin
  • Patent number: 9276049
    Abstract: An organic light-emitting apparatus has a structure capable of reducing defects during the formation of an insulation layer (e.g., a pixel defining layer). The organic light emitting apparatus includes a substrate having a display area and a peripheral area surrounding the display area; a step forming layer on the peripheral area of the substrate; an insulation layer on the substrate across the display area and the peripheral area, wherein the top surface of a portion of the insulation layer corresponding to the step forming layer by covering the step forming layer is higher than the top surface of the remaining portion of the insulation layer; and a first conductive layer on the insulation layer, an end portion of the first conductive layer being close to the portion of the insulation layer corresponding to the step forming layer.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: March 1, 2016
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jae-Kyung Go
  • Patent number: 9213872
    Abstract: In one or more embodiments described herein, there is provided an apparatus that is configured to determine respective signal strengths of radio frequency identification signalling received from multiple sources by a directional antenna. The apparatus is also configured to discriminate the radio frequency identification signalling from a particular source based on the particular signal strength of the radio frequency identification signalling received from that source.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: December 15, 2015
    Assignee: Nokia Technologies Oy
    Inventors: Timo Petteri Karttaavi, Ilkka Hermanni Hakala
  • Patent number: 9165981
    Abstract: An organic light emitting display includes a substrate; a first pixel electrode disposed on the substrate; a second pixel electrode disposed on the substrate; a hole auxiliary layer disposed on the first pixel electrode and the second pixel electrode; a first organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode; a blue organic emission layer disposed on the hole auxiliary layer in correspondence with the first pixel electrode and the second pixel electrode, the blue organic emission layer being further disposed on the first organic emission layer; a non-doping blue organic emission layer disposed on the blue organic emission layer; an electron auxiliary layer disposed on the non-doping blue organic emission layer; and a common electrode disposed on the electron auxiliary layer.
    Type: Grant
    Filed: January 20, 2014
    Date of Patent: October 20, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ji-Hoon Seo, Kwan-Hee Lee, Ji-Hwan Yoon, Byung-Hoon Chun, Ja-Hyun Im
  • Patent number: 9088005
    Abstract: An OLED display according to an exemplary embodiment includes: a first substrate; a second substrate arranged opposite to the first substrate; a sealant arranged in the shape of a closed loop along an edge of the second substrate between the first substrate and the edge of the second substrate; and a metal wire formed along the sealant between the first substrate and the sealant. One area of the metal wire has an opening pattern.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: July 21, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventor: Sang-Min Hong
  • Patent number: 9024921
    Abstract: An organic light emitting diode (OLED) display including: a substrate including a pixel area; a peripheral area enclosing the pixel area; a gate line; a data line; corresponding driving lines; a pixel electrode; an organic light emitting layer; a common electrode; and a getter formed at the peripheral area and partially overlapping the common electrode, wherein the driving lines overlapping the getter have a plurality of openings filled with the getter such that the getter amount may be increased, thereby increasing the moisture absorption amount.
    Type: Grant
    Filed: May 25, 2012
    Date of Patent: May 5, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Ki-Nyeng Kang, Kie Hyun Nam, Young-Hee Nam
  • Patent number: 9001857
    Abstract: Provided are assemblies and processes for activating light emitting devices. A first current sink is in electrical communication with a common source through a current node and configured to draw a first current through the current node in response to a respective control signal. A second current sink is also provided in electrical communication with the current node and in parallel with the first current sink, also configured to draw a second current through the current node in response to a respective control signal. An aggregate current is drawn through the array, determined as a combination of the first and second currents. A commanded current from the first current sink can be shunted around the second array and the second current sink, providing a capability to series both the first and second laser diode light-emitting arrays, while simultaneously drawing different current amplitudes through each array from a common potential source.
    Type: Grant
    Filed: August 23, 2011
    Date of Patent: April 7, 2015
    Assignee: Raytheon Company
    Inventors: Michael S. Lackey, Thomas H. Alford, Robert F. Stiffler, David Filgas
  • Patent number: 8992041
    Abstract: A lamp may include an outer shell having heat conductivity and a base provided in the outer shell. The outer shell may include a light source support, and a heat radiating surface exposed to the outside of the outer shell. The light source support may, in some examples, be formed integrally with the heat radiating surface. A light source may be supported on the light source support. The light source may be heated during lighting, and be thermally connected to the light source support. In some examples, the light source may be covered by a cover.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: March 31, 2015
    Assignee: Toshiba Lighting & Technology Corporation
    Inventor: Shigeru Osawa
  • Patent number: 8965079
    Abstract: An in-vivo device captures images of the GI system and transfers frames to an external system for analysis. As frames are transferred from the in-vivo device to the external system frames may be classified as belonging to a particular GI section. Based on statistical analysis of the classes, a temporary determination may be made, that the in-vivo device has transitioned to a “target section”, and, as a result of the temporary determination, the operation mode of the in-vivo device may temporarily change from a first mode to a second mode. If the temporary determination is followed by a determination which is based on analysis of additional classes, the determination that the in-vivo device is in the target section may be made final and the in-vivo device may remain in the second mode. Otherwise, the first operation mode may be resumed and the whole transition determination process may start anew.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: February 24, 2015
    Assignee: Given Imaging Ltd.
    Inventors: Ofra Zinaty, Eduard Rudyk
  • 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: 8872867
    Abstract: A signal processing device measures an actual luminance of a light-emitting device by setting levels of gradation values indicating the degree of light emission to a pixel circuit having the light-emitting device to generate measurement information. The device also calculates gradation deterioration characteristics based on the measurement information and the relationship between a gradation value and a luminance value when the pixel circuit is in a correction reference state. A deterioration value calculation calculates a conversion efficiency deterioration value of conversion efficiency for the light-emitting device to convert a driving current supplied for a gradation value into a luminance to generate conversion efficiency deterioration characteristic information.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: October 28, 2014
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8810765
    Abstract: An electroluminescence element includes an electroluminescence substrate including a thin film transistor substrate, and a light-emitting layer provided over the thin film transistor substrate and divided by picture-element separating portions so as to correspond to unit picture elements; and a sealing substrate arranged to hermetically seal the light-emitting layer of the electroluminescence substrate. At least one of the electroluminescence substrate and the sealing substrate is a flexible substrate. Spacers are provided between the electroluminescence substrate and the sealing substrate.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: August 19, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tohru Okabe, Hirohiko Nishiki
  • Patent number: 8803789
    Abstract: A display comprises a front-end component having light shutters and a plurality of backlight devices, wherein the display operates in a full screen video display mode and partial screen energy-saving auxiliary mode. In the full screen video display mode, the backlight devices are activated and in the partial screen energy-saving auxiliary mode, at least one backlight device is not activated. In the auxiliary mode, the light shutters can control luminance or the light shutters along with attenuating the backlight device control luminance. In the auxiliary mode, the backlight devices are driven via enabled inputs, a digital bus system, or an analog control signal.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: August 12, 2014
    Assignee: Thomson Licensing
    Inventor: Anton Werner Keller
  • Patent number: 8766881
    Abstract: The present invention allows an organic EL display device to perform display with high definition by reducing an area of each pixel forming a display region of the display device. A drive TFT for driving an organic EL element, a storage capacitance connected with a gate of the drive TFT, and a switching TFT connected to a scanning line are used in common by pixels arranged adjacent to each other in the lateral direction and hence, areas occupied by these circuit elements per one pixel can be reduced whereby the pixel can be made small. Further, a data line for supplying a video signal and a power source line for supplying an electric current to the organic EL elements can be used in common by the pixels arranged adjacent to each other and hence, the number of data lines and the number of power source lines can be halved thus reducing an area of the pixel. Due to such a constitution, the present invention acquires an organic EL display device capable of performing display with high definition.
    Type: Grant
    Filed: April 3, 2008
    Date of Patent: July 1, 2014
    Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Masamitsu Furuie, Hajime Akimoto
  • 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
  • Patent number: 8698706
    Abstract: An organic electroluminescent display system comprising at least one organic-light-emitting diode (OLED), a zener diode in series to the organic light-emitting diode, a rectification diode, and a capacitor used as a memory device. During a frame period of the display device, there are address and light emission periods. A reverse bias voltage is applied across the organic light-emitting diode during the address period to prevent metal migration into the organic layers of the OLED. Current mode data programming is used to address the display device. During the light emission period, charge previously stored in selected capacitors during the address period supplies a forward current for the OLEDs. A ramp waveform applied to the row electrode during the light emission period, forces the capacitor to discharge through the OLED and controls the forward current level. This keeps the operation of the OLEDs in their area of maximum performance.
    Type: Grant
    Filed: October 4, 2010
    Date of Patent: April 15, 2014
    Assignee: Imaging Systems Technology, Inc.
    Inventor: James C. Rutherford
  • Patent number: 8653541
    Abstract: A semiconductor device including a plurality of circuits that includes a transistor, where a semiconductor layer forming the transistor includes a first contact pad, a first part that is connected to the first contact pad and that extends in a direction intersecting a short direction of a pitch with which the circuits are arranged, a second part that extends from the first part in the short direction, and a second contact pad including the first part and the second part that are provided between the first contact pad and the second contact pad, where the second part overlaps an electrode layer across an insulating layer.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: February 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kouji Ikeda, Takanori Yamashita, Masami Iseki
  • Patent number: 8581271
    Abstract: At least one of the pixels has a first region and a second region that are the same in color but different in viewing angle characteristic, and includes a switching circuit configured to independently turn on or off each of the organic EL elements provided in the respective first and second regions.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: November 12, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noriyuki Shikina, Kiyofumi Sakaguchi, Nobuhiko Sato, Takashi Moriyama
  • Patent number: 8570245
    Abstract: A display device includes a pixel array unit having a matrix of pixels each configured such that an anode electrode of an organic electroluminescent element is connected to a source electrode of a drive transistor, a gate electrode of the drive transistor is connected to a source or drain electrode of a writing transistor, and a storage capacitor is connected between the gate and source electrodes of the drive transistor, scanning lines and power supply lines for individual pixel rows, and signal lines for individual pixel columns. A video signal reference potential is supplied to the signal lines for a period during which a scanning signal is supplied to the scanning lines during driving of pixels in a preceding row. During threshold correction for the drive transistor in a current pixel, the video signal reference potential and a potential of the cathode electrode of the organic electroluminescent element are equal.
    Type: Grant
    Filed: December 7, 2009
    Date of Patent: October 29, 2013
    Assignee: Sony Corporation
    Inventors: Yukihito Iida, Mitsuru Asano, Katsuhide Uchino
  • Patent number: 8542337
    Abstract: An embodiment of the invention provides a pixel structure of an active matrix organic light emitting display comprising a gate line, a common electrode line, a signal line, a power line, a first thin film transistor which is used as an addressing element, and a second thin film transistor which controls the organic light emitting display. A short-circuit-ring structure is connected between the common electrode line and the signal line and the short-circuit-ring structure communicates the signal line and the common electrode line in the case where a large current flows.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: September 24, 2013
    Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.
    Inventor: Mi Zhang
  • Patent number: 8537080
    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: October 27, 2011
    Date of Patent: September 17, 2013
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Katsuhide Uchino
  • Patent number: 8436790
    Abstract: In an EL display device in which color purity of each of red, blue and green is different, the EL display device displaying an image of a desired balance of red, blue and green is provided. A video signal supplied to each EL element is gamma (?)-corrected by a correction circuit, the color purity of each of blue luminescence, green luminescence, and red luminescence is suitably controlled in accordance with the voltage and current of the corrected video signal.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: May 7, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Jun Koyama
  • Patent number: 8432334
    Abstract: An organic light emitting display device, comprises a pixel unit including a plurality of pixels, each of the pixels including an organic light emitting diode having a first electrode, a second electrode, and an organic light emitting layer; a built-in-circuit comprising a driving circuit configured to drive the pixels; and a bus unit comprising bus lines configured to deliver pixel power to the pixels. The pixel unit, the built-in-circuit, and the bus unit are sequentially disposed from a central region of a display panel to an outer side of the display panel. The second electrode of the organic light emitting diode and one of the bus lines are electrically connected to each other through one of conductive patterns formed on at least a part of the built-in-circuit and at least a part of the bus unit.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: April 30, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Hyun-Chol Bang, Won-Kyu Kwak
  • Patent number: 8390542
    Abstract: An image-processing apparatus includes an average-luminance calculating unit that calculates the average luminance of pixels in an image, a correction-factor calculating unit that calculates a correction factor corresponding to the luminance of each pixel, a correction-value calculating unit that calculates a correction value corresponding to each pixel based on the average luminance and the correction factor, and an adding unit that adds the correction value to the luminance. The correction-value calculating unit sets the correction value to a maximum value of zero when the luminance has a maximum value.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: March 5, 2013
    Assignee: Sony Corporation
    Inventors: Kazuki Yokoyama, Kazuhiko Ueda, Mitsuyasu Asano, Tetsuji Inada
  • Patent number: 8378933
    Abstract: A pixel includes an organic light emitting diode (OLED) having a cathode electrode coupled to a second power source, a second transistor coupled to a data line and a first scan line, a first transistor coupled between a second electrode of the second transistor and an anode electrode of the OLED, a third transistor coupled between a gate electrode and a second electrode of the first transistor, a fourth transistor coupled between the gate electrode of the first transistor and an initialization power source, a fifth transistor coupled between a first electrode of the first transistor and a first power source, a first capacitor coupled between the gate electrode of the first transistor and the first power source, and a second capacitor coupled between the gate electrode and the first electrode of the first transistor.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: February 19, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Won-Kyu Kwak, Chang-Yeop Kim
  • Patent number: 8373640
    Abstract: In one embodiment of the present invention, a display device is disclosed which performs a divided-screen active driving, and which allows (i) its emitting region to be divided into smaller units, irrespective of the smallest module unit of a light source; and (ii) minimizing increase in costs for a driving system and manufacturing of an area light source, a display device of the present invention includes: a display panel having unit display pixels; an area light source arranged on a back surface of the display panel, the area light source having an emitting region which is divided into divided emitting regions; and a controlling section for controlling luminance of each of the divided emitting regions of the area light source, based on luminance information of video signals input, wherein the area light source includes: unit emitting pixels which controls light emission of the divided emitting regions through a matrix driving; the unit emitting pixels each having an electron emitting element for emitting an
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: February 12, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takashi Ishizumi, Yoshihiro Izumi, Yasukuni Yamane
  • Patent number: 8368297
    Abstract: An organic light emitting device, according to an exemplary embodiment of the present invention, includes a thin film transistor array panel including a pixel electrode, an organic light emitting member formed on the pixel electrode, a common electrode formed on the organic light emitting member, and a storage capacitor including a first conductive layer and a second conductive layer overlapping each other via the organic light emitting member. The first conductive layer may be formed with the same layer as the pixel electrode, and the second conductive layer may be formed with the same layer as the common electrode.
    Type: Grant
    Filed: April 9, 2009
    Date of Patent: February 5, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Young-II Kim
  • Patent number: 8310476
    Abstract: For the purpose of providing a display apparatus capable of improving display quality by expanding the light-emission area of pixels by improving the layout of pixels and common power-feed lines formed on a substrate, pixels (7A, 7B) including a light-emission element (40), such as an electroluminescence element or an LED element, are arranged on both sides of common power-feed lines (com) so that the number of common power-feed lines (com) is reduced. Further, the polarity of a driving current flowing between the pixels (7A, 7B) and the light-emission element (40) is inverted so that the amount of current flowing through the common power-supply lines “com” is reduced.
    Type: Grant
    Filed: March 3, 2008
    Date of Patent: November 13, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Tokuroh Ozawa
  • Patent number: 8294637
    Abstract: An active matrix substrate is provided which does not cause reductions in the brightness of electroluminescence elements, and which comprises appropriate peripheral circuitry occupying a small area. The active matrix substrate comprises peripheral circuits to supply current to EL elements provided for each pixel, and corresponding to EL elements, and further comprises a holding element (C) which holds a control voltage, a first active element (T1) connected to the holding element (C) and which supplies current to a light-emitting portion (OLED) based on a control voltage, and a second active element (T2) connected to the holding element (C) and which controls the charging and discharging of the holding element. In particular, the second active element (T2) is configured as a multiple-control-terminal type active element. As a result, there are no fluctuations in the programmed current.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: October 23, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Yojiro Matsueda
  • Patent number: 8294639
    Abstract: A display unit has an interlayer formed at least as one or more than one layers and arranged between a light-emitting layer and a diffractive element. The interlayer has a thickness not less than 500 nm and not more than 2,000 nm and an average refractive index greater than a refractive index of the light-emitting layer. The optical path length of the interlayer defined as a product of multiplication of its average refractive index by its thickness satisfies the requirement shown below: ( m + 0.1 ) 2 · 1 - ( n L n m ) 2 ? n m ? ? ( m + 0.6 ) · ? 0 2 · 1 - ( n L n m ) 2 where m is an integer not less than 0; ?0 is a wavelength in vacuum; nm is the average refractive index of the interlayer; d is the thickness of the interlayer; and nL is the refractive index of the light-emitting layer.
    Type: Grant
    Filed: December 16, 2010
    Date of Patent: October 23, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Daisuke Yamada
  • Patent number: 8263971
    Abstract: The OLED display device includes a first stack and a second stack that are separated from each other between an anode electrode and a cathode electrode, with a charge generation layer sandwiched between the first stack and the second stack, each of the first stack and the second stack having an emission layer. The first stack includes a blue emission layer formed between the anode electrode and the CGL. The second stack includes a fluorescent green emission layer and a phosphorescent red emission layer formed between the cathode electrode and the CGL. The blue emission layer includes one of a fluorescent blue emission layer and a phosphorescent blue emission layer.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: September 11, 2012
    Assignee: LG Display Co., Ltd.
    Inventor: Sung Hoon Pieh
  • Patent number: 8264427
    Abstract: Aspects of the invention provide an electro-optical device including first pixel portions each including an active element and second pixel portions each not including any active element, the first and second pixel portions being provided in an image display region of a substrate, a first driving device for driving the first pixel portions in an active driving method and a second driving device for driving the second pixel portions in a passive driving method. Accordingly, the invention can realize a display by using both an active driving method and a passive driving method with a simple structure.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: September 11, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Kazunori Sukurai
  • Patent number: 8232938
    Abstract: A driving method of a display device in which an image is displayed on a display panel having a display element arranged in a pixel matrix, includes comparing, among pixel data corresponding to a display content in each pixel, pixel data corresponding to an nth horizontal scan line of an Nth frame and pixel data corresponding to an nth horizontal scan line of an (N?1)th frame; and setting a brightness reduction ratio with respect to pixel data corresponding to the nth horizontal scan line of the Nth frame or a later horizontal scan line of the Nth frame based as a function of the comparison and all pixel data corresponding to the (N?1)th frame or all pixel data from the nth horizontal scan line of the (N?1)th frame to an (n?1)th horizontal scan line of the Nth frame and controlling power supplied.
    Type: Grant
    Filed: March 1, 2007
    Date of Patent: July 31, 2012
    Assignee: Global OLED Technology LLC
    Inventor: Makoto Kohno
  • Patent number: 8232960
    Abstract: Among various embodiments of the present disclosure, displaying electrophoretic particles can be performed by configuring an electrophoretic display for directed spreading of electrophoretic particles across a number of substantially planar display electrodes. Such a configuration can be accomplished by controlling planar spreading of the electrophoretic particles in an electrophoretic pixel with an electrical field between an in-plane storage electrode and an in-plane activation electrode. The in-plane activation electrode can be connected to an in-plane display electrode, which extends across a first area in the electrophoretic pixel adjacent to a display aperture having a second area that is substantially coextensive with the first area.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: July 31, 2012
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Peter J. Fricke, Alan R. Arthur
  • Patent number: 8217878
    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: September 23, 2010
    Date of Patent: July 10, 2012
    Assignee: Sony Corporation
    Inventors: Junichi Yamashita, Takao Tanikame, Katsuhide Uchino
  • Patent number: 8217860
    Abstract: A method of measuring a panel current in an active matrix organic electroluminescence display panel, wherein when a current flowing through a display panel when one or a plurality of pixels are caused to emit light is measured, a flow-in current flowing into the display panel from a side of a high voltage and a flow-out current flowing out from the display panel toward a side of a low voltage are simultaneously measured, and a value of a panel current is determined using both obtained measurement results.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: July 10, 2012
    Assignee: Global OLED Technology LLC
    Inventors: Seiichi Mizukoshi, Makoto Kohno, Kouichi Onomura
  • Patent number: 8174364
    Abstract: An RFID reader requires significant power supply current, upwards or beyond 0.5 amps. Much of this power is expended to activate the reader's radio frequency transmitter. For example, the reader's transmitter may constantly be active awaiting a RFID tag entering within its electromagnetic field. Sometimes an adequate power source, such as AC mains, is not available to provide continuous operation and instead a battery is powers the reader. This invention detects that a RFID tag is within reader range without using the reader's RF transmitter at full power. As a RFID tag is brought within range of a reader's antenna there is significant mutual inductance coupling between the tag antenna and the reader's antenna and this invention provides a sensitive detector of this mutual inductance. The detection of mutual inductance automatically triggers the reader's transmitter to a higher power which is necessary to fully activate the RFID tag.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: May 8, 2012
    Inventor: Michael Kenneth Pedigo
  • Patent number: 8154478
    Abstract: An organic electro luminescence display and driving method uses an image determination unit to generate image determination signals indicative of whether images generated in response to data signals are moving images still images, selects a gamma value corresponding to the brightness of the ambient light sensed, applies gamma correction signals corresponding to selected gamma values to control grey level voltages of the data signals, generates a selection signal based on a comparison of a previously set reference value with the photo sensor signal, and generates R?,G?,B? data to vary an input image RGB data to correspond to the selection signal, varies a change range of the changing R?,G?,B? data to correspond to the image determination signal, and supplies the varied change range of the changing data (R?,G?,B? data) to the data driver.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: April 10, 2012
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventors: Young-jong Park, Jong-soo Kim
  • Patent number: 8125416
    Abstract: A pixel circuit includes an organic EL element includes a storage capacitor charged with a data voltage; a first driving transistor responsive to charged voltage of the storage capacitor to supply drive current to the organic EL element; and a second driving transistor connected the storage capacitor and a predetermined power supply responsive to potential corresponding to a voltage drop in the organic EL element, and supplies charge current to the storage capacitor, circuitry for causing the second driving transistor to supply charge current to the storage capacitor from a time when the storage capacitor is charged with data voltage and the drive current from first driving transistor flows through the organic EL element. When drive current from the first driving transistor is stopped by changes in the charged voltage of storage capacitor, the drive current supplied to the organic EL element for a period corresponding to the data voltage.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: February 28, 2012
    Assignee: Global OLED Technology LLC
    Inventor: Kazuyoshi Kawabe