Patents by Inventor Webster E. Howard

Webster E. Howard has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6885147
    Abstract: The present invention relates to OLED devices having anodes with improved stability and longer lifetime. In particular, the present invention relates to OLEDs comprising an anode having improved stability and longer lifetime wherein the anode comprises a semi-transparent single layer comprising molybdenum.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: April 26, 2005
    Assignee: eMagin Corporation
    Inventors: Webster E. Howard, Gary W. Jones, Richard A. Campos, Chen-Jean Chou
  • Patent number: 6858989
    Abstract: An active matrix OLED display includes current driving TFT transistors to provide current to corresponding OLEDs. The control signals to each TFT gate include a data signal that is proportional to the desired luminance output for the OLED and a reverse data signal that is used to reverse bias the TFT to prevent threshold drift in the TFT. The data signal alteration is preformed either at a frame rate or at a line rate.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: February 22, 2005
    Assignee: eMagin Corporation
    Inventor: Webster E. Howard
  • Publication number: 20030052614
    Abstract: An active matrix OLED display includes current driving TFT transistors to provide current to corresponding OLEDs. The control signals to each TFT gate include a data signal that is proportional to the desired luminance output for the OLED and a reverse data signal that is used to reverse bias the TFT to prevent threshold drift in the TFT. The data signal alteration is preformed either at a frame rate or at a line rate.
    Type: Application
    Filed: September 20, 2001
    Publication date: March 20, 2003
    Inventor: Webster E. Howard
  • Publication number: 20020021088
    Abstract: The present invention relates to OLED devices having anodes with improved stability and longer lifetime. In particular, the present invention relates to OLEDs comprising an anode having improved stability and longer lifetime wherein the anode comprises a semi-transparent single layer comprising molybdenum.
    Type: Application
    Filed: July 31, 2001
    Publication date: February 21, 2002
    Inventors: Webster E. Howard, Gary W. Jones, Richard A. Campos, Chen-Jean Chou
  • Publication number: 20020003403
    Abstract: The present invention is directed to an OLED display device including an encapsulation assembly and methods for making such devices. The encapsulation assembly includes at least one layers that is a dielectric oxide layer directly in contact with at least part of a substrate.
    Type: Application
    Filed: May 17, 2001
    Publication date: January 10, 2002
    Inventors: Amalkumar P. Ghosh, Webster E. Howard, Gary W. Jones
  • Patent number: 6337492
    Abstract: The light emitting device comprises a plurality of stacked organic light emitting devices. The plurality of organic light emitting devices are arranged in a stack. The light emitting device further includes a controller for controlling operation of each of the plurality of organic light emitting devices in the stack. The controller supplies the same current to each of the organic light emitting devices in the stack. The controller simultaneously supplies the same current to each of the plurality of the organic light emitting devices.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: January 8, 2002
    Assignee: eMagin Corporation
    Inventors: Gary W. Jones, Webster E. Howard
  • Publication number: 20010052752
    Abstract: The present invention is directed to an OLED display device including an encapsulation assembly and methods for making such devices. The encapsulation assembly includes at least two layers, one of which is a dielectric oxide layer directly in contact with at least part of a substrate, and the other of which is preferably a polymer layer.
    Type: Application
    Filed: February 15, 2001
    Publication date: December 20, 2001
    Inventors: Amalkumar P. Ghosh, Gary W. Jones, Webster E. Howard
  • Patent number: 6255771
    Abstract: A field emitter device including an insulator structure provided on an upper gate line layer of the device. The insulator structure may surround groups of emitters arranged on adjacent gate lines, groups of emitters arranged on the same gate lines, and/or entire regions of a larger array of field emitters. The insulator structure may reduce the occurrence of flashovers to and from the gate lines and emitters when the field emitter device is used in a display. The insulator structure may also enhance the focus of electrons emitted by the field emitter device on the display screen. Focus may be further enhanced by the addition of a resistive coating on the insulator structure. Methods of making the insulator structure and resistive coating are also disclosed.
    Type: Grant
    Filed: December 4, 1997
    Date of Patent: July 3, 2001
    Assignee: eMagin Corporation
    Inventors: Gary W. Jones, Steven M. Zimmerman, Webster E. Howard, Stewart Lloyd
  • Patent number: 6218777
    Abstract: A structure to reduce the likelihood of flashover in a parallel plate electron beam array is disclosed. The structure may comprise a spacer structure between the parallel plates along the outer perimeter of the plates. The spacer structure may include a conductive member. The conductive member may shunt anode to cathode flashovers to a sink outside of the array before they reach the cathode. The conductive member may be provided by a conductive frit made of a metal/glass mixture, a metal foil, or a metal coating that extends through or next to the spacer structure.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: April 17, 2001
    Assignee: eMagin Corporation
    Inventors: Gary W. Jones, Webster E. Howard
  • Patent number: 6198220
    Abstract: A sealing structure for an organic light emitting device display. The sealing structure comprises a metal film overlying a dielectric film. The sealing structure has low moisture and oxygen permeability. At least one of the metal layers may react with moisture or oxygen to seal off pin holes. A net low stress sealing structure may be formed by combining tensile and compressive films. The sealing structure may be etched to create openings for connection to outside circuitry. The innovative sealing structure minimizes moisture leakage and vertical shorts between diode cathode and anode.
    Type: Grant
    Filed: May 8, 1998
    Date of Patent: March 6, 2001
    Assignee: eMagin Corporation
    Inventors: Gary W. Jones, Webster E. Howard, Steven M. Zimmerman
  • Patent number: 6023259
    Abstract: The present invention is a current driver for an active matrix organic light emitting device display. As embodied herein, the driver relies upon a single transistor, driven in a saturation regime to provide a current source for an OLED. This results in a pulse drive. The driver of the present invention is compatible with high speed integrated drivers and can be fabricated on the same substrate as the OLED. A technique for driving an OLED is disclosed that will produce a good quality gray scale image.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: February 8, 2000
    Assignee: Fed Corporation
    Inventors: Webster E. Howard, Olivier Prache
  • Patent number: 6016033
    Abstract: The present invention is directed to an electrode structure for an organic light-emitting device display. The electrode structure includes a transparent electrode and a high conductivity rib. The structure provides top side light output and a low line resistance, and enables a high resolution display. The structure permits a display to be built on top of a silicon driver chip for active matrix addressing.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: January 18, 2000
    Assignee: Fed Corporation
    Inventors: Gary W. Jones, Webster E. Howard, Steven M. Zimmerman
  • Patent number: 5341153
    Abstract: A method of displaying a high resolution multicolor image on a lower resolution display. The image comprises a plurality of image pixels containing at least first and second image subpixels having first and second colors. The image is displayed on a display having display pixels comprising at least first and second spatially offset display subpixels capable of displaying the first and second colors, respectively. In the method, the first display subpixel is displayed with an intensity which is a function of the intensities of at least two first image subpixels having positions extending over a first region having an area greater than the area of the first display subpixel. The first region is approximately centered on the position of the first display subpixel. A second display subpixel is displayed with an intensity which is a function of the intensities of at least two second image subpixels having positions extending over a second region having an area greater than the area of the second display subpixel.
    Type: Grant
    Filed: June 13, 1988
    Date of Patent: August 23, 1994
    Assignee: International Business Machines Corporation
    Inventors: Terry L. Benzschawel, Webster E. Howard
  • Patent number: 4845482
    Abstract: The elimination of crosstalk between data lines and pixel cells in a thin film transistor/liquid crystal display is accomplished by applying a data signal to a given data line for a time period less than the standard scan line period of the display, and applying a crosstalk compensation signal to the given data line for the remainder of the scan line period.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: July 4, 1989
    Assignee: International Business Machines Corporation
    Inventors: Webster E. Howard, Paul M. Alt
  • Patent number: 4792728
    Abstract: A cathodoluminescent lamp in the form of a vacuum diode or triode uses a self-supporting YAG crystal as the light emitter. The crystal shape can be selected (spherical, slab, bar) for desired effect and light trapping is turned to advantage by selectively coating the crystal surface to provide for preferential light emission.
    Type: Grant
    Filed: June 10, 1985
    Date of Patent: December 20, 1988
    Assignee: International Business Machines Corporation
    Inventors: Ifay F. Chang, Ronald I. Feigenblatt, Webster E. Howard, Eugene I. Gordon
  • Patent number: 4767723
    Abstract: A process for making a self-aligned thin film transistor, said process comprising the steps of: (1) providing a gate which comprises a glass substrate, a transparent electrode on top thereof, and a metal electrode on top of said transparent electrode, (2) forming a stack by depositing over said gate a triple layer structure consisting of gate dielectric material, active material and a top passivating dielectric, (3) coating the top of said triple layer with a dual-tone photoresist, (4) exposing said photoresist from the top through a mask having transparent areas, opaque areas and areas transparent to selective wavelengths, using broad band UV light, (5) developing the photoresist by treatment with a solvent, (6) etching the stack with a liquid etchant through to the glass substrate, (7) exposing the photoresist from the bottom through the glass substrate using near UV light, (8) developing the photoresist with a solvent, and (9) etching off the top passivating layer of the stack.
    Type: Grant
    Filed: October 30, 1987
    Date of Patent: August 30, 1988
    Assignee: International Business Machines Corporation
    Inventors: William D. Hinsberg, III, Webster E. Howard, Carlton G. Willson
  • Patent number: 4518891
    Abstract: A large-area electroluminescent (EL) faceplate for storage CRT is described. The EL faceplate has a non-planar mesh structure which includes individual current limiting resistance between a power source and an array of small-area active regions for improving the faceplate breakdown characteristics. The mesh, which comprises high conductivity strips and delivers power to the active regions, is substantially reduced in area relative to a simple conventional device, and is disposed on thick dielectric nonactive regions to further reduce the possibility of catastrophic breakdown.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: May 21, 1985
    Assignee: International Business Machines Corporation
    Inventor: Webster E. Howard, Jr.