Electroluminescent Patents (Class 365/111)
  • Patent number: 11557235
    Abstract: A device includes multiple row power lines and multiple row control lines arranged in rows, where each row control line corresponds to one of the row power lines. The device also includes multiple column power lines arranged in columns. The device further includes multiple unit cells, where each unit cell is coupled to one of the row power lines and one of the row control lines and selectively coupled to one of the column power lines. In addition, the device includes multiple row power switches and multiple column power switches arranged in pairs, where each pair includes one of the row power switches and one of the column power switches. Each pair is configured to selectively (i) connect a corresponding one of the rows and a corresponding one of the columns or (ii) isolate the corresponding one row and the corresponding one column from each other.
    Type: Grant
    Filed: December 15, 2021
    Date of Patent: January 17, 2023
    Assignee: Raytheon Company
    Inventors: Jehyuk Rhee, Bryan W. Kean, John L. Vampola
  • Patent number: 10295677
    Abstract: A method includes directing a probe beam to a target that includes an array of data portions in a data storage medium arranged so that a beam area of the probe beam extends across a plurality of adjacent data portions, the array including a data portion subset with each data portion of the subset responsive to the probe beam to produce a response illumination, receiving the response illumination at a detector, and determining data values corresponding to the plurality of adjacent data portions based on the received response illumination. Apparatus and systems are also disclosed.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: May 21, 2019
    Assignee: Battelle Memorial Institute
    Inventors: David W. Gotthold, Andrew J. Stevens, Nigel D. Browning, Eric Jensen, Nathan L. Canfield, Alan G. Joly
  • Patent number: 10157973
    Abstract: An organic light emitting display device comprises a driving transistor for driving an organic light emitting diode; a first transistor controlled by a scan signal and connected between a reference voltage line and a first node of the driving transistor; a second transistor controlled by the scan signal and connected between a data line and a second node of the driving transistor; a first plate with an improved conductive characteristic and connected to the semiconductor layer of the driving transistor and the semiconductor layer of the first transistor; a second plate positioned on the first plate, and connected to the semiconductor layer of the second transistor and a gate electrode of the driving transistor; and a pixel electrode of the organic light emitting diode, positioned on the second plate and connected to the first plate through a contact hole.
    Type: Grant
    Filed: May 3, 2016
    Date of Patent: December 18, 2018
    Assignee: LG Display Co., Ltd.
    Inventor: HeeDong Choi
  • Patent number: 9799711
    Abstract: An organic EL display panel includes plural streaks of first partition walls juxtaposed on the upper side of an underlying layer in such a manner that each of the plural streaks of the first partition walls extends along a first direction, plural streaks of second partition walls that are juxtaposed on the upper side of the underlying layer in such a manner that each of the plural streaks of the second partition walls extends along a second direction intersecting the first direction, and each have an upper surface at a position lower than upper surfaces of the first partition walls, and a light emitting layer formed along the first direction on the upper side of the underlying layer and in gaps between the first partition walls adjacent to each other in such a manner as to get over the plural streaks of the second partition walls.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: October 24, 2017
    Assignee: JOLED INC.
    Inventor: Masakazu Takata
  • Patent number: 9356081
    Abstract: An organic light emitting display device comprises a driving transistor for driving an organic light emitting diode; a first transistor controlled by a scan signal and connected between a reference voltage line and a first node of the driving transistor; a second transistor controlled by the scan signal and connected between a data line and a second node of the driving transistor; a first plate with an improved conductive characteristic and connected to the semiconductor layer of the driving transistor and the semiconductor layer of the first transistor; a second plate positioned on the first plate, and connected to the semiconductor layer of the second transistor and a gate electrode of the driving transistor; and a pixel electrode of the organic light emitting diode, positioned on the second plate and connected to the first plate through a contact hole.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: May 31, 2016
    Assignee: LG Display Co., Ltd.
    Inventor: HeeDong Choi
  • Patent number: 8315080
    Abstract: Provided are a luminescent device and a method of manufacturing the same. The luminescent device includes a charge trapping layer having bistable conductance and negative differential resistance (NDR) characteristics, and an organic luminescent layer electrically connected to the charge trapping layer. The charge trapping layer comprise a nanocrystal layer intervened in an organic layer, and the nanocrystal layer comprises a plurality of nanocrystals.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: November 20, 2012
    Assignee: IUCF-HYU
    Inventors: Jea Gun Park, Gon Sub Lee, Su Hwan Lee, Dal Ho Kim, Sung Ho Seo, Woo Sik Nam, Hyun Min Seung, Jong Dae Lee, Dong Won Shin
  • Patent number: 7813160
    Abstract: Memory devices and recordable media are disclosed that take advantage of memory effects in the electronic transport in CdSe nanocrystal (NC) quantum dot arrays. Conduction through a NC array can be reduced with a negative voltage and then restored with a positive voltage. Light can also be used to restore or even increase the NC array conduction. The switching of the conduction in CdSe NC arrays and found the behavior to be highly sensitive to the value and duration of the laser and voltage pulses.
    Type: Grant
    Filed: January 11, 2006
    Date of Patent: October 12, 2010
    Assignee: The Trustees Of The University Of Pennsylvania
    Inventors: Marija Drndic, Michael D. Fischbein
  • Publication number: 20100208507
    Abstract: Provided are a luminescent device and a method of manufacturing the same. The luminescent device includes a charge trapping layer having bistable conductance and negative differential resistance (NDR) characteristics, and an organic luminescent layer electrically connected to the charge trapping layer.
    Type: Application
    Filed: April 23, 2008
    Publication date: August 19, 2010
    Applicant: IUCF-HYU
    Inventors: Jea Gun Park, Gon Sub Lee, Su Hwan Lee, Dal Ho Kim, Sung Ho Seo, Woo Sik Nam, Hyun Min Seung, Jong Dae Lee, Dong Won Shin
  • Publication number: 20090273870
    Abstract: The present invention is provided to suppress occurrence of an erroneous operation in a protection circuit due to a relatively small power source fluctuation such as a power source noise. The protection circuit has a first resistor and a capacitor connected in series between a power source line and a ground line, an inverter whose input is connected between the first resistor and the capacitor, and a MOS transistor whose gate electrode receives an output of the inverter and whose drain electrode and source electrode are connected to the power source line and the ground line. When a high voltage fluctuation occurs in the power source line, a level change at a connection point between the first resistor and the capacitor is delayed according to a time constant. By the delay, the MOS transistor that receives an output of the inverter is temporarily turned on and discharges a high voltage to the ground line.
    Type: Application
    Filed: July 10, 2009
    Publication date: November 5, 2009
    Inventors: Hiroyasu Ishizuka, Kazuo Tanaka
  • Publication number: 20090040805
    Abstract: A non-volatile memory device includes lower and upper electrodes over a substrate, a conductive organic material layer between the lower and the upper electrodes, and a nanocrystal layer located within the conductive organic material layer, wherein the nanocrystal layer includes a plurality of nanocrystals surrounded by an amorphous barrier, wherein the device has a multi-level output current according to a voltage level of an input voltage coupled to the lower and the upper electrodes during a data read operation.
    Type: Application
    Filed: April 23, 2008
    Publication date: February 12, 2009
    Applicant: Hynix Semiconductor Inc.
    Inventors: Jea-Gun Park, Sung-Ho Seo, Woo-Sik Nam, Young-Hwan Oh, Yool-Guk Kim, Hyun-Min Seung, Jong-Dae Lee
  • Patent number: 7488540
    Abstract: In a production process of a thin film laminate for constituting an organic EL element or the like, a thin film laminate is provided in which no water stays in a thin film formed of a hydrophilic material and, thus, the function of other thin films overlying the surface of the thin film, such as a luminescent layer, is not deteriorated. The thin film laminate comprises: a substrate; and, provided on the substrate in the following order, a first thin film and a second thin film. The first thin film is formed of a hydrophilic organic material. The hydrophilic organic material has hydrophilic groups which have been converted to lipophilic group. The lipophilic groups are partially or wholly returned to hydrophilic groups upon exposure to heat energy or a radiation. The second thin film is formed of a lipophilic organic material.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: February 10, 2009
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Kiyoshi Itoh, Daigo Aoki
  • Patent number: 7382512
    Abstract: Various devices and methods employing a resistive phase change material are disclosed.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: June 3, 2008
    Inventors: Zhizhang Chen, Qin Liu, Timothy F. Myers, Chien-Hua Chen
  • Patent number: 6960663
    Abstract: The present invention relates to luminescence materials for an organic electroluminescent device (OELD), and particularly to phenyl pyridine-iridium metal complex compounds of formula (1), and preparation method thereof. In addition, the present invention relates to an organic electroluminescent device using the luminescence materials according to the present invention, which can greatly enhance the efficiency of luminescence and increase the operating life time of the device: wherein R1, R2 and R3 each are the same as defined in the specification.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: November 1, 2005
    Assignee: LG Electronics, Inc.
    Inventors: Ki-Dong Kim, Sang-Dae Kim, Yoon-Soo Han, Yoon-Heung Tak, Dong-Uk Kim, Tae-Jeong Kim, Ung-Chan Yoon, Sung-Hoon Kim, Hee-Wan Moon
  • Patent number: 6734711
    Abstract: An input transition stabilizer circuit, adapted to stabilize an input transition of a signal appearing at the input of an input circuit, the input transition stabilizer circuit includes a resistor having a first terminal connected to the input of the input circuit;, and a capacitor. A first MOS device is connected by a source and a drain between a second terminal of the resistor and a first terminal of the capacitor, while a second MOS device is connected by a source and a drain between a second terminal of the capacitor and ground. A delay circuit is adapted to provide a signal to a gate of the first MOS device and a gate of the second MOS device corresponding to a signal at the input of the input circuit, but delayed by a first predetermined interval. In some embodiments the delay circuit is provided in two parts, with the signal provided to the first MOS device being delayed by a further amount, as compared with the signal provided to the second MOS device.
    Type: Grant
    Filed: April 1, 2003
    Date of Patent: May 11, 2004
    Assignee: Texas Instruments Incorporated
    Inventor: Eugene B. Hinterscher
  • Patent number: 6687149
    Abstract: In an optical memory device, an electroluminescent matrix has a plurality of individually electrically addressable electroluminescent cells, each having a stack of memory cells. The electroluminescent cells are addressable by applying a biased voltage through a grid of light-transparent electrodes.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: February 3, 2004
    Assignee: OptaByte, Inc.
    Inventors: Boris Chernobrod, Jacob Malkin, Vladimir Schwartz
  • Patent number: 6541911
    Abstract: An EL lamp for emitting light in multiple color which includes a first light-permeable electrode layer formed at the back side of a transparent substrate, a first luminous material layer containing a first luminous material, an intermediate light-permeable electrode layer, a second luminous material layer containing a second luminous material, a back electrode, and at least two elements of (i) a first color material contained in the first luminous material layer, (ii) a second color material contained in the second luminous material layer, and (iii) luminous color converting layer containing a third color material, disposed between the first luminous material layer and second luminous material layer, and a color coat layer containing a fourth color material, disposed at the front surface side of the transparent substrate. The color material closer to the back electrode of the at least two elements has the color of longer wavelength than the remoter color material.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: April 1, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Koji Tanabe, Yosuke Chikahisa
  • Publication number: 20020090184
    Abstract: Methods and apparatus are described for retrieving information from a storage medium. A first portion of the surface of the storage medium is exposed to stimulating light which diffuses in the storage medium under a second portion of the surface adjacent the first portion. The second portion of the surface is shielded from exposure to the stimulating light. Stimulated light corresponding to the information is received with at least one detector positioned to receive the stimulated light via the second portion of the surface of the storage medium. The stimulated light is released from the storage medium in response to the stimulating light diffused under the second portion of the surface.
    Type: Application
    Filed: June 21, 2001
    Publication date: July 11, 2002
    Inventor: Michel Sayag
  • Publication number: 20020006051
    Abstract: The invention has for its object to provide a phosphor thin film which can dispense with any filter and has satisfactory color purity, is particularly well fit for RGB full-color Els, and simplifies a full-color EL panel production process, thereby providing a phosphor thin film which is less susceptible to luminance variations and can be produced in improved yields and so at lower costs and its fabrication process as well as an EL panel. This is achieved by the provision of a phosphor thin film comprising a matrix material containing as a main component an alkali earth aluminate that is an oxide, with sulfur added to the matrix material, and further containing an element that provides a luminescentce center.
    Type: Application
    Filed: May 30, 2001
    Publication date: January 17, 2002
    Applicant: TDK Corporation
    Inventors: Yoshihiko Yano, Tomoyuki Oike
  • Publication number: 20010001597
    Abstract: In a semiconductor storage device comprising a plurality of memory cells P formed in a matrix form in a semiconductor substrate, write and read for each of which is carried out through a word line and bit line, wherein each said memory cells includes a first and a second memory transistor MT1 and MT2 connected in series. In this configuration, the semiconductor storage device with high reliability which produces abnormality in operation can be provided.
    Type: Application
    Filed: October 22, 1999
    Publication date: May 24, 2001
    Inventors: HIROKI YAMAMOTO, YOSHIHIRO TADA
  • Patent number: 6046925
    Abstract: Photochromic fluorescent protein moiety having two or more stable states having excitation or emission spectra that are shifted from one wavelength region to another wavelength region in the two states are described. The photochromic material switches between states by irradiation with light of appropriate wavelengths. The two states are preferably stable at room temperature and in the dark. The switching between states can be reversible.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: April 4, 2000
    Assignee: The Regents of the University of California
    Inventors: Roger Y. Tsien, Roger Heim, Andrew B. Cubitt, Robert M. Dickson, William E. Moerner
  • Patent number: 5958541
    Abstract: Disclosed is a method for storing and retrieving information. More specifically, the present invention is a method for forming predetermined patterns, or data structures, using materials which exhibit enhanced absorption of light at certain wavelengths or, when interrogated with a light having a first wavelength, provide a luminescent response at a second wavelength. These materials may exhibit this response to light inherently, or may be made to exhibit this response by treating the materials with ionizing radiation.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: September 28, 1999
    Assignee: Battelle Memorial Institute
    Inventors: Steven D. Miller, George W. Endres
  • Patent number: 5936878
    Abstract: The present invention relates to the field of photo-chromic materials, in particular, to photo-chromic compounds and matrices suitable for use in optical memory systems, including three dimensional optical memory systems for computers, multimedia applications and the like. In particular, nonfluorescent spiropyrane is transformed into fluorescent merocyanine by electromagnetic radiation.
    Type: Grant
    Filed: December 12, 1997
    Date of Patent: August 10, 1999
    Assignee: OMD Devices LLC
    Inventors: Vladimir Arsenov, Jacob N. Malkin
  • Patent number: 5889694
    Abstract: A read-only data storage and retrieval device is presented having no moving parts and requiring very low power. Addressing can be accomplished sequentially where the address increments automatically or can be accomplished randomly. High density storage is achieved through the use of a highly symmetric diode matrix that is addressed in both coordinate directions; its symmetry makes the Dual-addressed Rectifier Storage (DRS) Array very scaleable, particularly when made as an integrated circuit. For even greater storage flexibility, multiple digital rectifier storage arrays can be incorporated into the device, one or more of which can be made removable and interchangeable.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: March 30, 1999
    Inventor: Daniel R. Shepard
  • Patent number: 5843341
    Abstract: Electro-conductive oxides showing excellent electro-conductivity, electrodes using the electro-conductive oxide and methods for manufacturing the same are described. The electro-conductive oxides are represented by the general formula: M(1).sub.x M(2).sub.y In.sub.z O.sub.(x+3y/2+3s/2)-d. The above electro-conductive oxides show not only excellent electro-conductivity but also excellent transparency all over the visible region and therefore they are particularly useful as, for example, electrodes for liquid crystal displays, EL displays and solar cells, which require light transmission.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: December 1, 1998
    Assignee: Hoya Corporation
    Inventors: Masahiro Orita, Hiroyuki Sakai, Megumi Takeuchi, Hiroaki Tanji
  • Patent number: 5454112
    Abstract: Auxiliary light source for a display is controlled by a light source controller. The light source controller executes a control operation for turning the auxiliary light source on or off in accordance with detecting a change of supplied power, detecting a command sent from an input device, and detecting a special status, for example the operating status mode of a printer or disk drive.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: September 26, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Masayuki Kadono, Yoshimi Hironaka
  • Patent number: 4864536
    Abstract: An optical memory system and associated method uses electron trapping materials. Data may be written into an optical memory made of the electron trapping material by application of a visible light source to the material. The visible light source causes electrons to be trapped in the material, which electrons will be released and emit visible light upon application of a read beam infrared source to the material. An arrangement realizes logical functions by parallel memories each memory having stripes of memory material disposed upon a plastic substrate.
    Type: Grant
    Filed: June 5, 1986
    Date of Patent: September 5, 1989
    Assignee: Quantex Corporation
    Inventor: Joseph Lindmayer
  • Patent number: 4680461
    Abstract: An apparatus and method for obtaining a memory function in picture intensifier or amplifier tubes by providing such tubes with an output screen formed of an electroluminescent cell. This cell emits visible light rays when an electric voltage is applied between its surfaces, and possesses hysteresis properties. When voltage is applied to the screen, the picture sent by the electron beam is stored, and re-established when desired, for a given period. The invention can be applied to radiology.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: July 14, 1987
    Assignee: Thomson-CSF
    Inventors: Jean C. Boit, Jean P. Galves
  • Patent number: 4221002
    Abstract: It has been discovered for the practice of this disclosure that there is a threshold for switching with light an AC coupled electroluminescence (EL) device within the .DELTA.V of the luminance-voltage hysteresis loop thereof. Practice of this disclosure provides hybrid matrix-addressing of an electroluminescence display device with memory through luminance-voltage hysteresis by "ANDING" electrical and optical signals. It has particular utility for a large aspect ratio display, e.g., a single line display, i.e., one for which there is more information content in one direction than in another direction.
    Type: Grant
    Filed: November 6, 1978
    Date of Patent: September 2, 1980
    Assignee: International Business Machines Corporation
    Inventors: Paul M. Alt, Omesh Sahni
  • Patent number: 4207617
    Abstract: An EL display panel comprising an electroluminescent element made of, for example, a ZnS:Mn layer sandwiched between a pair of dielectric layers exhibits hysteresis properties within light intensity versus applied voltage characteristics. A front electrode is formed on one of the dielectric layers, and a rear electrode is formed on the other dielectric layer in order to apply a sustaining voltage signal across the electroluminescent element for maintaining the memoried display information. An electron beam is applied to a desired position on the EL display panel through the rear electrode at a time when the sustaining voltage signal bears the zero level in order to erase the memoried information. The memoried display information is electrically read out by detecting a polarization relaxation current which flows through a memoried display position when an electron beam is applied thereto.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: June 10, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shuhei Yasuda, Toshihiro Ohba, Chugi Suzuki, Masayoshi Koba, Jun Kudo
  • Patent number: 4193095
    Abstract: A driver system of a display panel including a matrix of luminescent elements with a bi-stable operation condition comprises a circuit arrangement for combining a plurality of divided lighting periods to provide a gray-scale display and a circuit arrangement for increasing or decreasing the respective widths of the divided lighting periods in correlation with each other, whereby a control of luminance with gray-scale is provided.
    Type: Grant
    Filed: February 7, 1978
    Date of Patent: March 11, 1980
    Assignee: Hitachi, Ltd.
    Inventor: Masashi Mizushima
  • Patent number: 4078229
    Abstract: Method and media are provided for producing three-dimensional sensible objects by the intersection of radiation beams, whereby an active region is produced as a result of the intersection of said beams raising a molecule in the active region to its excited state. Particularly, non-radiation emissive active regions are formed which generate the sensible object.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: March 7, 1978
    Inventors: Wyn K. Swanson, Stephen D. Kremer
  • Patent number: RE41733
    Abstract: A read-only data storage and retrieval device is presented having no moving parts and requiring very low power. Addressing can be accomplished sequentially where the address increments automatically or can be accomplished randomly. High density storage is achieved through the use of a highly symmetric diode matrix that is addressed in both coordinate directions; its symmetry makes the Dual-addressed Rectifier Storage (DRS) Array very scaleable scalable, particularly when made as an integrated circuit. For even greater storage flexibility, multiple digital rectifier storage arrays can be incorporated into the device, one or more of which can be made removable and interchangeable.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: September 21, 2010
    Assignee: Contour Semiconductor, Inc.
    Inventor: Daniel R. Shepard
  • Patent number: RE42310
    Abstract: A read-only data storage and retrieval device is presented having no moving parts and requiring very low power. Addressing can be accomplished sequentially where the address increments automatically or can be accomplished randomly. High density storage is achieved through the use of a highly symmetric diode matrix that is addressed in both coordinate directions; its symmetry makes the Dual-addressed Rectifier Storage (DRS) Array very scaleable, particularly when made as an integrated circuit. For even greater storage flexibility, multiple digital rectifier storage arrays can be incorporated into the device, one or more of which can be made removable and interchangeable.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: April 26, 2011
    Assignee: Contour Semiconductor, Inc.
    Inventor: Daniel R. Shepard