Electroluminescent Display Elements Patents (Class 345/36)
  • Patent number: 10503151
    Abstract: A control panel of a machining tool includes a measurement unit measuring a temperature and a humidity involved with an atmosphere inside the control panel, an adjustment unit adjusting the temperature and the humidity, and an atmosphere control unit controlling an atmosphere inside the control panel by controlling the adjustment unit. Since the atmosphere control unit receives electric power supplied from a system separated from a power supply supplying electric power to the machining tool, it is possible to protect various electronic devices inside the control panel by measuring and adjusting the atmosphere inside the control panel even when the machining tool power supply is not turned on.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 10, 2019
    Assignee: FANUC CORPORATION
    Inventor: Taisei Fujimoto
  • Patent number: 10171793
    Abstract: An image capturing device is provided comprising an image sensor for capturing a first image of a scene, a light source for illuminating the scene with a first flash of coded light, and a network interface for communicating with a communications network and/or a further image capturing device. The device is operative to encode information into the first flash, enabling retrieval of the first image from a first data storage, capture the first image, and store the first image in the first data storage. Optionally, the device may be operative to detect a second flash of coded light emitted by the further image capturing device, decode information enabling retrieval of a second image captured by the further image capturing device from a second data storage, retrieve the second image, and create a 3D model from the first image and the second image.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: January 1, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Matthew John Lawrenson, Till Burkert, Julian Charles Nolan
  • Patent number: 9972240
    Abstract: A method for driving a display device includes steps of providing a data signal in a first scan period and maintaining a level of the data signal until a second scan period, and providing a scan signal in the first scan period and maintaining a level of the scan signal until the second scan period. A display device is also disclosed herein.
    Type: Grant
    Filed: August 25, 2015
    Date of Patent: May 15, 2018
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Che-Ming Hsu, Chih-Cheng Chen
  • Patent number: 9786218
    Abstract: An organic light emitting display device includes a pixel unit, a first voltage supply unit, a second voltage supply unit, and a selection unit. The pixel unit includes a plurality of pixels coupled to power lines. The first voltage supply unit is configured to output a first voltage. The second voltage supply unit is configured to output a second voltage. The selection unit is configured to supply any one of the first and second voltages to the pixels through the power lines.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: October 10, 2017
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seung-Jun Lee, Dong-Won Moon
  • Patent number: 9723203
    Abstract: Systems, methods, and computer readable mediums are provided for generating a panoramic image that includes, in at least some aspects, generating targets that are each associated with a portion of the panoramic image, displaying the targets, shifting the targets when the user device is repositioned, capturing images when the targets are within a threshold distance of the center of the display, and generating the panoramic image from the captured images.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: August 1, 2017
    Assignee: Google Inc.
    Inventor: Scott Ettinger
  • Patent number: 9667862
    Abstract: Systems, methods, and computer readable mediums are provided to generate a number of targets for a panoramic image, each of the targets defining a portion of the panoramic image, monitor a position of a user device with respect to a current target, responsive to determining that the user device is properly positioned with respect to the current target, capture a first image for the current target using a camera of the user device, monitor the position of the user device with respect to a next target, responsive to determining that the user device is properly positioned with respect to the next target, capture a second image for the next target using the camera of the user device; and generate the panoramic image using the first image and the second image.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: May 30, 2017
    Assignee: Google Inc.
    Inventors: Evan Rapoport, Scott Ettinger
  • Patent number: 9645694
    Abstract: The conductive film which can inhibit the occurrence of moire and can greatly improve recognition property, a display device equipped with the conductive film, and a method for determining a pattern of a conductive film are provide. In the conductive film, a spectral intensity of moire of a lowest frequency is equal to or less than ?3.6 expressed in terms of common logarithm, and the spectral intensity is represented by convolution of spatial frequency characteristics of the mesh pattern that are obtained at least when the mesh pattern is observed from a front side and spatial frequency characteristics of the pixel array pattern of the display unit that are obtained at least when the pixel array pattern is observed from a front side. The mesh pattern may include a plurality of disconnection portions.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: May 9, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Kazuchika Iwami, Hiroshige Nakamura
  • Patent number: 9570532
    Abstract: The embodiment of the present invention provides a pixel structure, pixel unit structure, display panel and display apparatus, which is used to increase the electrical-optical efficiency of the display apparatus. The pixel structure includes an active matrix driving circuit, also includes at least two light emitting devices connected in series which are connected to the active matrix driving circuit, the light emitting devices compose the light emitting device group, and the active matrix driving circuit drives the light emitting devices to emit light.
    Type: Grant
    Filed: December 12, 2013
    Date of Patent: February 14, 2017
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Lujiang Huangfu, Zhanjie Ma
  • Patent number: 9472303
    Abstract: Embodiments of the present disclosure disclose a shift register, a gate driving circuit, an array substrate and a display apparatus capable of effectively eliminating a drifting phenomenon of an output signal and increasing an output stability of the shift register. The shift register comprises input terminals of the shift register comprising a start signal input terminal, a first clock signal input terminal and a second clock signal input terminal; a pre-charging circuit which is in response to a start signal and a first clock signal; a first pulling-up circuit which is in response to an enable level of the start signal and an enable level of the first clock signal; a pulling-down circuit which is in response to a disable level of the first clock signal and an enable level of the second clock signal; a second pulling-up circuit; and an output terminal of the shift register.
    Type: Grant
    Filed: May 2, 2013
    Date of Patent: October 18, 2016
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventor: Zhanjie Ma
  • Patent number: 9430968
    Abstract: There is realized a display device capable of compensating for a deterioration of a circuit element while suppressing an increase of a circuit scale. One horizontal scanning period for a monitor row is composed of: a detection preparation period where preparation for detecting TFT characteristics and OLED characteristics is performed in the monitor row; a TFT characteristic detection period where current measurement for detecting the TFT characteristics is performed; an OLED characteristic detection period where current measurement for detecting the OLED characteristics is performed; and a light emission preparation period where preparation for allowing an organic EL element to emit light is performed in the monitor row. Data lines are used not only as signal lines that transfer a signal for allowing an organic EL element in each pixel circuit to emit light at desired brightness, but also as characteristic detecting signal lines.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: August 30, 2016
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Noritaka Kishi, Noboru Noguchi, Masanori Ohara
  • Patent number: 9035311
    Abstract: An organic light emitting diode (OLED) display device and a method of fabricating the same are provided. The OLED display device includes a substrate having a thin film transistor region and a capacitor region, a buffer layer disposed on the substrate, a gate insulating layer disposed on the substrate, a lower capacitor electrode disposed on the gate insulating layer in the capacitor region, an interlayer insulating layer disposed on the substrate, and an upper capacitor electrode disposed on the interlayer insulating layer and facing the lower capacitor electrode, wherein regions of each of the buffer layer, the gate insulating layer, the interlayer insulating layer, the lower capacitor electrode, and the upper capacitor electrode have surfaces in which protrusions having the same shape as grain boundaries of the semiconductor layer are formed. The resultant capacitor has an increased surface area, and therefore, an increased capacitance.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 19, 2015
    Assignee: Samsung Display Co., Ltd.
    Inventors: Byoung-Keon Park, Tae-Hoon Yang, Jin-Wook Seo, Soo-Beom Jo, Dong-Hyun Lee, Kil-Won Lee, Maxim Lisachenko, Yun-Mo Chung, Bo-Kyung Choi, Jong-Ryuk Park, Ki-Yong Lee
  • Patent number: 8916855
    Abstract: An organic light-emitting display apparatus includes a thin film transistor having an active layer, a gate electrode, and source and drain electrodes, an organic light-emitting device having a pixel electrode connected to the thin film transistor, an intermediate layer including an emissive layer, and an opposite electrode, and an opposite electrode contact portion having a joining region and an insulating region. The opposite electrode and a power interconnection line contact each other in the joining region. An insulating layer is interposed between the opposite electrode and the power interconnection line in the insulating region, and a portion of the insulating layer penetrates into the power interconnection line in the insulating region.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: December 23, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sun Park, Yul-Kyu Lee, Kyu-Sik Cho, Ji-Hoon Song
  • Patent number: 8902245
    Abstract: A device that may be used as a multi-color pixel is provided. The device has a first organic light emitting device, a second organic light emitting device, a third organic light emitting device, and a fourth organic light emitting device. The device may be a pixel of a display having four sub-pixels. The first device may emit red light, the second device may emit green light, the third device may emit light blue light and the fourth device may emit deep blue light. A method of displaying an image on such a display is also provided, where the image signal may be in a format designed for use with a three sub-pixel architecture, and the method involves conversion to a format usable with the four sub-pixel architecture.
    Type: Grant
    Filed: April 7, 2011
    Date of Patent: December 2, 2014
    Assignee: Universal Display Corporation
    Inventor: Woo-Young So
  • Patent number: 8890860
    Abstract: The present invention relates to an EL display device in which a stereoscopic image is perceived and eyeglasses having a switching means with which an image for a left eye or an image for a right eye is selectively perceived. The image for the left eye and the image for the right eye are displayed in a display portion of the EL display device by holding an image signal from a signal line in a first capacitor in a first period, holding the image signal held in the first capacitor in a second capacitor to control current that flows through an emission-control transistor in a second period, and turning on a driving transistor to control light emission of a light-emitting element and holding an image signal from a signal line in the first capacitor in a third period.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: November 18, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Jun Koyama
  • 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: 8822998
    Abstract: An organic light emitting display device includes a substrate, a plurality of sub-pixels on the substrate, each sub-pixel including a first region configured to emit light and a second region configured to transmit external light, a plurality of thin film transistors disposed in the first region of the each sub-pixel, a plurality of first electrodes disposed in the first region of each sub-pixel and electrically connected to the thin film transistors, a first insulating layer on at least a portion of the first region of each sub-pixel to cover a portion of the first electrode, an organic emission layer on the first electrode, a second insulating layer on at least a portion of the second region of each sub-pixel, the second insulating layer including a plurality of openings therein, and a second electrode covering the organic emission layer, the first insulating layer, and the second insulating layer.
    Type: Grant
    Filed: March 8, 2011
    Date of Patent: September 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seong-Min Kim, Jun-Ho Choi, Jin-Koo Chung
  • Patent number: 8823009
    Abstract: The present invention provides a method for manufacturing a highly reliable display device at a low cost with high yield. According to the present invention, a step due to an opening in a contact is covered with an insulating layer to reduce the step, and is processed into a gentle shape. A wiring or the like is formed to be in contact with the insulating layer and thus the coverage of the wiring or the like is enhanced. In addition, deterioration of a light-emitting element due to contaminants such as water can be prevented by sealing a layer including an organic material that has water permeability in a display device with a sealing material. Since the sealing material is formed in a portion of a driver circuit region in the display device, the frame margin of the display device can be narrowed.
    Type: Grant
    Filed: June 1, 2012
    Date of Patent: September 2, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Satoshi Murakami, Motomu Kurata, Hiroyuki Hata, Mitsuhiro Ichijo, Takashi Ohtsuki, Aya Anzai, Masayuki Sakakura
  • Patent number: 8819568
    Abstract: A windowing system for an electronic device that uses an electronic paper display may include a compositor, a frame buffer, and a display controller manager. One or more applications running on the electronic device may request multiple changes to windows. The compositor may determine multiple update areas, where an update area indicates the smallest area of the electronic paper display that should be updated as a result of changes being made to a window. The update areas may be stored in the frame buffer. The display controller manager may create a cumulative update area based on the update areas that are determined between a begin update instruction and an end update instruction. The display controller manager may instruct a display controller to update only the portion of the display corresponding to the cumulative update area.
    Type: Grant
    Filed: April 3, 2009
    Date of Patent: August 26, 2014
    Assignee: Amazon Technologies, Inc.
    Inventors: Christopher Thomas Hull, John Lattyak, Lawrence Arnold Lynch-Freshner
  • 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: 8791884
    Abstract: There is provided a method of driving an organic light emitting display capable of displaying an image with uniform brightness. The method includes storing a brightness characteristic corresponding to emission time of an organic light emitting diode (OLED), adding first data supplied in units of frames by pixels to generate accumulated data, extracting accumulated data of a pixel to which currently supplied first data is to be supplied and calculating maximum brightness corresponding to emission time of the extracted accumulated data, calculating maximum brightness corresponding to emission time of largest accumulated data among the accumulated data, controlling a bit value of the first data using maximum brightness of a pixel to which the first data is to be supplied and maximum brightness of the largest accumulated data to generate second data, and controlling a voltage value of a first power source supplied to the pixels in response to the maximum brightness of the largest accumulated data.
    Type: Grant
    Filed: December 4, 2008
    Date of Patent: July 29, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Do-Ik Kim
  • Patent number: 8773332
    Abstract: A method for driving pixels of an active matrix organic light-emitting diode display is disclosed. The method includes charging a first terminal and a second terminal of a first capacitor with a reference voltage and a reset voltage respectively, and turning on a third switch simultaneously, floating the second terminal of the first capacitor, charging the first terminal of the first capacitor according to a data voltage, floating the first terminal of the first capacitor and turning on the third switch. Thus, determine a driving current independent of process variances of the N-type thin film transistor and a voltage drop of an OLED according to a difference voltage across the first capacitor.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: July 8, 2014
    Assignee: AU Optronics Corp.
    Inventors: Chien-Ming Nieh, Tsung-Ting Tsai
  • Patent number: 8669972
    Abstract: A driving method of a liquid crystal display panel having a source line and a counter electrode, includes driving the counter electrode to a first potential, driving the, counter electrode to a second potential being different from the first potential, setting the counter electrode and the source line to a third potential by short-circuiting the counter electrode and the source line to an interconnection having a potential between the first potential and the second potential, and driving the source line to a potential corresponding to an image data. The setting of the counter electrode and the source line to the third potential occurs in a period of one frame.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: March 11, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroaki Shirai
  • Patent number: 8659027
    Abstract: A voltage equal to the threshold value of a TFT (106) is held in capacitor unit (109). When a video signal is inputted from a source signal line, the voltage held in the capacitor unit is added thereto and a resultant signal is applied to a gate electrode of the TFT (106). Even when a threshold value is varied for each pixel, each threshold value is held in the capacitor unit (109) for each pixel. Thus, the influence of a variation in threshold value can be eliminated. Further, holding of the threshold value is conducted by only the capacitor unit (109) and a charge does not move at writing of a video signal so that a voltage between both electrodes is not changed. Thus, it is not influenced by a variation in capacitance value.
    Type: Grant
    Filed: February 14, 2013
    Date of Patent: February 25, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Patent number: 8600194
    Abstract: This disclosure pertains to devices, methods, and computer readable media for performing positional sensor-assisted panoramic photography techniques in handheld personal electronic devices. Generalized steps that may be used to carry out the panoramic photography techniques described herein include, but are not necessarily limited to: 1.) acquiring image data from the electronic device's image sensor; 2.) performing “motion filtering” on the acquired image data, e.g., using information returned from positional sensors of the electronic device to inform the processing of the image data; 3.) performing image registration between adjacent captured images; 4.) performing geometric corrections on captured image data, e.g., due to perspective changes and/or camera rotation about a non-center of perspective (COP) camera point; and 5.) “stitching” the captured images together to create the panoramic scene, e.g., blending the image data in the overlap area between adjacent captured images.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: December 3, 2013
    Assignee: Apple Inc.
    Inventor: Frank Doepke
  • Patent number: 8587194
    Abstract: An organic electroluminescent display (OELD) device includes a first substrate having a first unit pixel region including first and second pixel regions; first and second gate lines along a first direction; first and second data lines along a second direction; a switching TFT in the first pixel region; a driving TFT in the first pixel region; a passivation layer including a first contact hole exposing a portion of the driving TFT; a first electrode contacting the driving TFT through the first contact hole; a bank surrounding the second pixel region an organic emitting layer in the second pixel region; and a transparent second electrode on the organic emitting layer and the bank, wherein the second pixel region is a region shifted from the first pixel region such that the second gate line goes across the second pixel region.
    Type: Grant
    Filed: October 19, 2009
    Date of Patent: November 19, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Jae-Yoon Lee, Sung-Joon Bae
  • Patent number: 8582052
    Abstract: Backlit LCD displays are becoming commonplace within many vehicle applications. The unique advantage of this invention is that it optimizes system power savings for display of low dynamic range (LDR) images by dynamically controlling spatially adjustable backlighting. This is accomplishes through use of a control technique that takes into account the sequential nature of the video display process.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: November 12, 2013
    Assignee: Gentex Corporation
    Inventor: Harold C. Ockerse
  • Patent number: 8552929
    Abstract: A graphical display station of arbitrary shape such as channel letters or other shaped structures is populated with pixels which are components of flexible pixel strings which can be arranged to fit the arbitrary shape(s). The flexible pixel strings provide for straightforward and cost effective fabrication of channel letter or other shaped displays. The invention also includes pixel units which comprise lighting elements together with such control circuits as are needed to roperly drive the lighting elements to form a graphical image. Addressing of the particular pixels is provided to accommodate the arbitrary arrangement of pixels of the flexible pixel strings. Methods of fabricating a channel letter display are also disclosed.
    Type: Grant
    Filed: January 2, 2013
    Date of Patent: October 8, 2013
    Assignee: Daktronics, Inc.
    Inventors: Thomas R. Mittan, Chad Neal Gloege, Brett David Wendler
  • Patent number: 8462087
    Abstract: An organic light emitting diode display device and the driving method thereof that is adaptive for increasing display quality. The organic light emitting diode display device according to an embodiment includes a display panel where pixels having an organic light emitting diode device are arranged in a matrix type and a data driver that supplies a data voltage and an inverted voltage to the pixels, where the inverted voltage is symmetric to the data voltage relative to a reference voltage.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: June 11, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Hong Koo Lee, Sang Hoon Jung
  • Patent number: 8462083
    Abstract: An inverter includes a first PMOS transistor having a gate electrode coupled to a first input port, a first electrode coupled to a first node and a second electrode coupled to the gate electrode or a second power source; a second PMOS transistor having a gate electrode coupled to the first input port, and first and second electrodes coupled respectively to a first power source and an output port; a third PMOS transistor having a gate electrode coupled to the first node, first and second electrodes coupled respectively to the output port and a second input port; and a capacitor coupled between the first node and the output port.
    Type: Grant
    Filed: April 13, 2009
    Date of Patent: June 11, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Jung-Keun Ahn
  • Patent number: 8409887
    Abstract: An organic light emitting diode (OLED) display device and a method of fabricating the same are provided. The OLED display device includes a substrate having a thin film transistor region and a capacitor region, a buffer layer disposed on the substrate, a gate insulating layer disposed on the substrate, a lower capacitor electrode disposed on the gate insulating layer in the capacitor region, an interlayer insulating layer disposed on the substrate, and an upper capacitor electrode disposed on the interlayer insulating layer and facing the lower capacitor electrode, wherein regions of each of the buffer layer, the gate insulating layer, the interlayer insulating layer, the lower capacitor electrode, and the upper capacitor electrode have surfaces in which protrusions having the same shape as grain boundaries of the semiconductor layer are formed. The resultant capacitor has an increased surface area, and therefore, an increased capacitance.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: April 2, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Byoung-Keon Park, Tae-Hoon Yang, Jin-Wook Seo, Soo-Beom Jo, Dong-Hyun Lee, Kil-Won Lee, Maxim Lisachenko, Yun-Mo Chung, Bo-Kyung Choi, Jong-Ryuk Park, Ki-Yong Lee
  • 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: 8378356
    Abstract: A voltage equal to the threshold value of a TFT (106) is held in capacitor unit (109). When a video signal is inputted from a source signal line, the voltage held in the capacitor unit is added thereto and a resultant signal is applied to a gate electrode of the TFT (106). Even when a threshold value is varied for each pixel, each threshold value is held in the capacitor unit (109) for each pixel. Thus, the influence of a variation in threshold value can be eliminated. Further, holding of the threshold value is conducted by only the capacitor unit (109) and a charge does not move at writing of a video signal so that a voltage between both electrodes is not changed. Thus, it is not influenced by a variation in capacitance value.
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: February 19, 2013
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Patent number: 8339386
    Abstract: An electroluminescent (EL) device including an illumination area having one or more primary EL emitters; a reference area having a reference EL emitter; a reference driver circuit for causing the reference EL emitter to emit light while the EL device is active; a sensor for detecting light emitted by the reference EL emitter; and a measurement unit for detecting an aging-related electrical parameter of the reference EL emitter while it is emitting light. The device further includes a controller for receiving an input signal for each primary EL emitter in the illumination area, forming a corrected input signal from each input signal using the detected light and the aging-related electrical parameter, and applying the corrected input signals to the respective primary EL emitters in the illumination area.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: December 25, 2012
    Assignee: Global OLED Technology LLC
    Inventors: Felipe A. Leon, Christopher J. White
  • Patent number: 8325118
    Abstract: In a pixel circuit 100, a driving TFT 110, a switching TFT 115, and an organic EL element 130 are provided between a power supply wiring line Vp and a common cathode Vcom and a capacitor 120 and a switching TFT 111 are provided between a gate terminal of the driving TFT 110 and a data line Sj. A switching TFT 112 is provided between a connection point B between the capacitor 120 and the switching TFT 111 and the power supply wiring line Vp, a switching TFT 113 is provided between the gate and drain terminals of the driving TFT 110, and a switching TFT 114 is provided between the gate terminal of the driving TFT 110 and a reference supply wiring line Vs. A potential that brings the driving TFT 110 into a conduction state is applied to the reference supply wiring line Vs. Thus, variations in the threshold voltage of a drive element can be properly compensated for and unwanted light emission from an electro-optical element can be prevented.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 4, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Takahiro Senda
  • Patent number: 8319709
    Abstract: A display device of the invention includes a display panel attached to one face side of a light transmissive circuit board and a light transmissive substrate attached to the other face side of the circuit board. A mounted component is mounted on the other face side of the circuit board. The circuit board includes a light transmissive junction layer for joining the circuit board to the light transmissive substrate at a position avoiding the mounted component. The junction layer includes a core substrate formed of a resin, an adhesive layer formed on one face of the core substrate, and a bonding layer formed on the other face of the core substrate and cured. The adhesive layer is adhered to the circuit board, and the bonding layer is firmly fixed to the light transmissive substrate.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: November 27, 2012
    Assignees: Hitachi Displays, Ltd., Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Hiroshi Ito, Kazunori Ojima, Hideaki Abe, Shinji Tanabe, Masayuki Yanagihara
  • Patent number: 8294652
    Abstract: A driving method for driving an LCD panel having a counter electrode and a source line. In a first period, the counter electrode is driven to a potential VCOMH. In a second period, the counter electrode and the source line are short-circuited to a power supply interconnection having a power supply potential VCI. In a third period, the counter electrode is connected to a ground interconnection while the source line is kept to be short-circuited to the power supply interconnection. In a fourth period, the counter electrode is pulled down to a potential VCOML lower than a ground potential In a fifth period, the source line is driven to a potential corresponding to an image data while the counter electrode is kept to the potential VCOML. The electric power consumed in pulling down the counter electrode from a positive potential to a negative potential can be effectively reduced.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: October 23, 2012
    Assignee: Renesas Electronics Corporation
    Inventor: Hiroaki Shirai
  • 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: 8237734
    Abstract: A portable electronic device and a light flickering method for light emitting elements thereof are both disclosed herein. The portable electronic device includes at least one light emitting element. The light flickering method comprises the following steps: setting personalized light flickering data with a user interface; storing the personalized light flickering data; generating a control signal in accordance with the personalized light flickering data; and generating a driving signal in accordance with the control signal and driving the light emitting elements with the driving signal.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: August 7, 2012
    Assignee: HTC Corporation
    Inventor: Ming-Jer Yang
  • 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: 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: 8194011
    Abstract: An electronic apparatus includes unit circuits provided with electronic devices, data lines connected to the unit circuits, a first output device to output, as a first output, a current or a voltage corresponding to an externally supplied data signal, a second output device to output, as a second output, a current or a voltage corresponding to the magnitude of the first output, and a selection supply device to select one of or both the first output from the first output device and the second output from the second output device and to supply the selected output to the data line. With this configuration, the image reproducibility in a low-luminance/low-grayscale display area of a display apparatus using EL devices is enhanced.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 5, 2012
    Assignee: Seiko Epson Corporation
    Inventor: Yoichi Imamura
  • Patent number: 8035109
    Abstract: A voltage equal to the threshold value of a TFT (106) is held in capacitor unit (109). When a video signal is inputted from a source signal line, the voltage held in the capacitor unit is added thereto and a resultant signal is applied to a gate electrode of the TFT (106). Even when a threshold value is varied for each pixel, each threshold value is held in the capacitor unit (109) for each pixel. Thus, the influence of a variation in threshold value can be eliminated. Further, holding of the threshold value is conducted by only the capacitor unit (109) and a charge does not move at writing of a video signal so that a voltage between both electrodes is not changed. Thus, it is not influenced by a variation in capacitance value.
    Type: Grant
    Filed: April 28, 2008
    Date of Patent: October 11, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventor: Hajime Kimura
  • Patent number: 8035633
    Abstract: An organic electro-luminescence display is disclosed. The display includes a pixel unit configured to display at least a portion of an image, a first regulator configured to generate first and second power voltages and to transmit the first and second power voltages to the pixel power source line, a second regulator configured to generate a predetermined voltage and to transmit the predetermined voltage to a driver driving unit, and a power generating unit. The power generating unit is configured to generate another predetermined voltage, to transmit the other predetermined voltage to the signal generator, to generate a third power voltage, to transmit the third power voltage to the pixel unit, and to generate a fourth power voltage. The display also includes a switching unit configured to transmit the third and fourth power voltages to the pixel power source line when the first and second power voltages are off.
    Type: Grant
    Filed: August 29, 2007
    Date of Patent: October 11, 2011
    Assignee: Samsung Mobile Display Co., Ltd
    Inventor: Sung-cheon Park
  • Patent number: 7995008
    Abstract: A drive circuit that compensates for the dispersion of the characteristics of drive transistors is disclosed. A switch SW2 is turned off, and switches SW1 and SW3 are turned on. Thereby, a constant current from a constant current source CC1 is flown in a drive transistor T1. Consequently, a gate voltage corresponding to the constant current Is written in the gate of the drive transistor T1. Then, the switches SW1 and SW3 are turned off, and the switch SW2 is turned on. Simultaneously, the voltage of a capacitor C1 on the side of the switch SW4 is varied according to a signal voltage, and thereby the voltage is added to the gate of the drive transistor T1 to flow a current corresponding to the signal voltage in the drive transistor T1.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: August 9, 2011
    Assignee: Global OLED Technology LLC
    Inventor: Koichi Miwa
  • Patent number: 7982704
    Abstract: A data driving circuit may include a shift register unit which may further include a plurality of first stages connected in series that may receive data signals and may output the data signals, in which each first stage may receive the data signals output from a preceding first stage, a latch unit including a plurality of second stages, in which each second stage may be connected to a different predetermined first stage, in which each second stage receives the data signals output from the predetermined first stage, in which the number of second stages may be substantially half the number of the first stages, and a D/A converter connected to the latch unit which may receive digital data signals and output analog data signals.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: July 19, 2011
    Assignee: Samsung Mobile Display Co., Ltd.
    Inventor: Dong Yong Shin
  • Patent number: 7903056
    Abstract: A voltage-current converting converts a voltage signal into a current signal. In an example operation, a source of a transistor is connected to a first power source, the source is connected to an input terminal via a coupling capacitor, and a gate and a drain of the transistor are connected to a second power source so that current flows between the source and the drain while a constant voltage is applied to the input terminal. To output the current signal, the drain is disconnected from the second power source, the voltage signal is supplied from the input terminal to the holding capacitor via the coupling capacitor, the coupling capacitor is disconnected from the input terminal, the gate is disconnected from the second power source, the drain is connected to the second power source, and the source is connected to an output terminal.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: March 8, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Somei Kawasaki, Takanori Yamashita
  • Patent number: 7832870
    Abstract: According to one embodiment, a projection system includes a color wheel operable to filter light into a passed component and a reflected component. The projection system also includes a digital micromirror device comprising a plurality of micromirrors each operable to receive the passed component and the reflected component. Each micromirror is selectively positionable to direct, at approximately the same time, the passed component and the reflected component to desired locations. The projection system also includes an optical system operable to direct the passed component and the reflected component from the color wheel to the digital micromirror device at approximately the same time.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: November 16, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory S. Pettitt, Andrew I. Russell, Bradley W. Walker
  • Patent number: 7811170
    Abstract: A disclosed thin light-emitting interface displays may be mounted to a surface on the gaming machine. The light-emitting elements used in the interface displays may be provided from electro-luminescent elements, organic light emitting diode (OLED) elements and combinations thereof. The thin light-emitting interface displays may be used to input and output gaming information on the gaming machine. The gaming information that is input and output via the interface display may be used to provide: 1) a game of chance played on the gaming machine, 2) player tracking services, 3) game services available on the gaming machine and 4) attract features. In one embodiment, a game input interface display is provided with a plurality of input buttons where a number and a format of the input buttons are dynamically configurable for different types of games of chance played on the gaming machine.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: October 12, 2010
    Assignee: IGT
    Inventors: Ron Winans, Richard Ollins
  • Patent number: RE44756
    Abstract: A display panel comprises a plurality of arranged pixels of organic EL devices, each having a pair of electrodes and a luminescent layer containing an organic EL material and sandwiched between the electrodes. The plurality of arranged pixels include fluorescent pixels of organic EL devices formed by mainly using a fluorescent material and phosphorescent pixels of organic EL devices formed by mainly using a phosphorescent material. A display apparatus comprises a controller for controlling the display panel, including correcting the difference between the electroluminescent characteristics of the fluorescent pixels and those of the phosphorescent pixels.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: February 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Osamu Yuki