Patents Assigned to Display Technologies
  • Patent number: 6105791
    Abstract: An inventory counting article pusher display tray system includes an elongate track having a front end, a rear wall, and a floor for positioning a row of articles thereon for movement along the track. The track further defines a series of longitudinally spaced numbers visible from above the track and extending rearwardly from the track front end, for indicating the number of articles in or removed from the row. A pusher is connected to the track for movement therealong and has a front side for engagement with a rearmost article on the track. A spring urges the pusher toward the track end of said track so as to move all articles on the track toward the track front. A reflective panel is secured to the pusher for movement as a unit along the floor, the reflective panel being disposed below the floor and angled relative to the floor so as to project substantially forwardly one of the numbers reflecting the position of the pusher along the track.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: August 22, 2000
    Assignee: Display Technologies, LLC
    Inventors: Jay Chalson, Anthony Camello
  • Patent number: 6054807
    Abstract: A base structure for use with a flat panel field emission display device. A spacer layer is provided in the base assembly to generally planarize the base assembly prior to mechanical planarization. As a result, the base assembly is more reliable and permits improved manufacturing yields. In addition to improving planarity of the base assembly, the spacer layer may increase electrical isolation between the base electrodes and the grid electrodes of the field emission display.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: April 25, 2000
    Assignee: Micron Display Technology, Inc.
    Inventor: Craig M. Carpenter
  • Patent number: 6037104
    Abstract: In one aspect the invention includes a method of forming a semiconductor device, comprising: a) forming a layer over a substrate; b) forming a plurality of openings extending into the layer; c) depositing particles on the layer; d) collecting the particles within the openings; and e) using the collected particles as a mask during etching of the underlying substrate to define features of the semiconductor device. In another aspect, the invention includes a method of forming a field emission display, comprising: a) forming a silicon dioxide layer over a conductive substrate; b) forming a plurality of openings extending into the silicon dioxide layer; c) depositing particles on the silicon dioxide layer; d) collecting the particles within the openings; e) while using the collected particles as a mask, etching the conductive substrate to form a plurality of conically shaped emitters from the conductive substrate; and f) forming a display screen spaced from said emitters.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: March 14, 2000
    Assignee: Micron Display Technology, Inc.
    Inventor: Eric A. Lahaug
  • Patent number: 6022256
    Abstract: A low temperature method of sharpening the emission tip of a field emission display includes the step of oxidizing the silicon substrate and the emission tip in an atmosphere of oxygen and ozone at temperatures below 800.degree. C. The oxidation step forms an oxide layer on the emission tip without significant flow of oxide or silicon during oxidation. The oxide layer is subsequently etched to expose the emission tip.
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: February 8, 2000
    Assignee: Micron Display Technology, Inc.
    Inventor: J. Brett Rolfson
  • Patent number: 6002206
    Abstract: An organic electroluminescent device, particularly for use as a display, is disclosed which is driven according to a pulsed mode of operation which allows much higher current densities to be injected into the device. This is achieved by selection of particular pulse durations and duty cycles, and by an improved geometry for the electroluminescent device in which the resistance of anode lines is reduced.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: December 14, 1999
    Assignee: Cambridge Display Technology Limited
    Inventors: Nick Harrison, Nir Tessler, Paul May
  • Patent number: 5975318
    Abstract: An assembly supporting a display shelf at a non-transverse angle to a support includes at least one elongate support, at least one transversely-extending display shelf and angling brackets. Each elongate support defines a plane, an upright front surface and a plurality of longitudinally spaced first engaging elements facing forwardly in the support front surface. Each transversely-extending display shelf defines a generally upright back surface and at least one plurality of longitudinally spaced second engaging elements facing rearwardly from the shelf back surface. The plurality of second engaging elements are configured and dimensioned for cooperation and interconnection with the first engaging elements for releasable maintenance of the shelf in a plane transverse to the plane of the support. The angling brackets are interposed between the shelf back surface and the support front surface.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: November 2, 1999
    Assignee: Display Technologies, Inc.
    Inventor: Richard Jay
  • Patent number: 5969475
    Abstract: A light-emitting cavity device comprising: a pair of mirrors spaced apart to define a resonant cavity; a luminescent layer located in the cavity; and a control layer located in the cavity and controllable to adjust the resonance wavelength of the cavity and thereby spectrally redistribute the energy emitted by the luminescent layer.
    Type: Grant
    Filed: December 3, 1997
    Date of Patent: October 19, 1999
    Assignee: Cambridge Display Technology Ltd.
    Inventors: Richard Henry Friend, Helmut Becker
  • Patent number: 5965901
    Abstract: A light-emissive polymer device comprising: an anode; a cathode; a conjugated light-emissive polymer layer located between the anode and the cathode; and a driver for applying a voltage drive scheme between the anode and the cathode of a pattern having a relatively high voltage portion which causes the polymer layer to emit light and a relatively low voltage portion during which substantially no light is emitted by the polymer layer.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: October 12, 1999
    Assignee: Cambridge Display Technology Ltd.
    Inventors: Stephen Karl Heeks, Hermann Felix Wittmann
  • Patent number: 5965979
    Abstract: A method of making a light emitting device comprises the laminating together of two self-supporting components, at least one of which has a light emitting layer (12) on an inner surface thereof. A first self-supporting component is formed by coating a first substrate (10) with an organic light emissive material (12). A second self-supporting component is formed by coating a second substrate (2) with an organic material which is one of a light emissive material and a charge transport material (8). The two self-supporting components are laminated together such that the organic materials (8, 12) are located between the substrates (2, 10) in the finished device.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: October 12, 1999
    Assignee: Cambridge Display Technology Limited
    Inventors: Richard Henry Friend, Andrew Bruce Holmes, Stephen Carl Moratti
  • Patent number: 5929562
    Abstract: A method of fabricating an organic electroluminescent display, which includes laminating together a plurality of self-supporting organic light-emitting devices, each of which is capable of functioning separately as an individual device; wherein each of the organic light-emitting devices in the display emits radiation differently from one another in respect of color, pattern and/or direction; and wherein each of the organic light-emitting devices in the display includes a substrate, a first electrode and a second electrode, at least one of which electrodes is at least semi-transparent, and an organic electroluminescent layer between the electrodes.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: July 27, 1999
    Assignee: Cambridge Display Technology Limited
    Inventor: Karl Pichler
  • Patent number: 5904256
    Abstract: The display rack includes a plurality of separate and distinct longitudinally elongate channels. Each channel has a front, a track and a pair of laterally spaced, longitudinally extending sides. Additionally, each channel has on one side thereof a plurality of widely longitudinally spaced apart male engaging means (lugs) projecting laterally outwardly from the channel side; and, for each one of the male engaging means, the other channel side has an associated set of at least three relatively narrowly longitudinally spaced apart female engaging means (slots). The associated slot sets are widely longitudinally spaced apart, and each female engaging means of the associated slot sets is configured and dimensioned to receive one of the male engaging means.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: May 18, 1999
    Assignee: Display Technologies, Inc.
    Inventor: Richard Jay
  • Patent number: 5899799
    Abstract: Grooves are cut into an under pad of a polishing pad assembly formed by an under pad and an over pad. The grooves cause channeling of the over pad so that slurry received on the polishing face of the pad assembly is delivered across the pad assembly's surface in a controlled fashion.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: May 4, 1999
    Assignee: Micron Display Technology, Inc.
    Inventors: Kevin Tjaden, G. Hugo Urbina
  • Patent number: 5898428
    Abstract: A transmission line tap for a field emission display includes a driving circuit formed from a charging and clearing circuit and a storage circuit. In one embodiment, the charging and clearing circuit is a single transistor coupled between a supply voltage and the storage circuit. The storage circuit is a single storage capacitor coupled between the transistor and the reference potential. In another embodiment, the charging and clearing circuit is formed from three transistors and an intermediate capacitor, and the storage circuit is formed from a storage capacitor and an output buffer. In either embodiment, pulses of an input voltage selectively charge the storage capacitor to a fixed voltage. The driving circuit then drives a column line of an emitter substrate in response to the storage capacitor. In the first embodiment, the storage capacitor is cleared by pulsing the supply voltage.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: April 27, 1999
    Assignee: Micron Display Technology Inc.
    Inventors: David A. Zimlich, Garrett W. Hall
  • Patent number: 5894293
    Abstract: A current controlled field emission display includes a pair of pulsed transistors that charge and discharge capacitance within the field emission display. The capacitance may be a separate circuit element or may be the parasitic capacitance of the integrated transistors and related circuitry. Various circuit configurations are employed to control charge transfer to and from the capacitance. The control circuit is driven by a series of pulse pairs where the first pulse in each pair controls charging of the capacitance and the second pulse controls discharging of the capacitance through the emitter set.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: April 13, 1999
    Assignee: Micron Display Technology Inc.
    Inventors: Glen E. Hush, Russell J. Baker
  • Patent number: 5892320
    Abstract: A field emission display includes a substrate (400) having a trench (402) formed therein, an emitter (418) formed in the trench (402), a dielectric layer (412) disposed on the substrate (400), and a grid material layer (406) disposed on the dielectric layer (412). The dielectric layer (412) is exposed by a planarization method. Consequently, the emitter (418) is necessarily aligned with the opening in the grid material layer (406). An electric field applied to the grid material layer (406) activates emitter (418) to emit electrons (416) to strike a faceplate (414).
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: April 6, 1999
    Assignee: Micron Display Technology, Inc.
    Inventors: Kevin Tjaden, John K. Lee
  • Patent number: 5886461
    Abstract: The present invention is directed to a conductor/electrode for a faceplate anode of a field emission display wherein said conductor/electrode is comprised of tin oxide. Alternatively, the present invention is directed to a transparent conductor/electrode for a faceplate anode of a field emission display wherein said conductor/electrode is comprised of from about 90% to about 99% tin oxide and from about 1% to about 10% antimony.
    Type: Grant
    Filed: October 24, 1995
    Date of Patent: March 23, 1999
    Assignee: Micron Display Technology, Inc.
    Inventor: Surjit S. Chadha
  • Patent number: 5885477
    Abstract: The present invention is directed to a novel etching process for a semiconductor material which inhibits corrosion of metal comprised of pretreating the material, preferably with a surfactant, and then exposing the material to a mixture comprising salt, a buffered oxide etch, and optionally a surfactant.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: March 23, 1999
    Assignee: Micron Display Technology, Inc.
    Inventors: Robert T. Rasmussen, Surjit S. Chadha, David A. Cathey
  • Patent number: 5880502
    Abstract: CMOS devices and process for fabricating low voltage, high voltage, or both low voltage and high voltage CMOS devices are disclosed. According to the process, p-channel stops and source/drain regions of PMOS devices are implanted into a substrate in a single step. Further, gates for both NMOS and PMOS devices are doped with n-type dopant and NMOS gates are self-aligned.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: March 9, 1999
    Assignee: Micron Display Technology, Inc.
    Inventors: John K. Lee, Behnam Moradi, Michael J. Westphal
  • Patent number: 5871807
    Abstract: A process is provided for forming a conductive line between a conductor and a spacer formed on a substrate of a field emission display. In one embodiment, the process performs the steps of disposing a screen between the substrate and a distributing member, the screen having an opening which permits the extrusion a conductive material, and moving the distributing member relative to the screen to extrude the conductive material through the opening and form a conductive line connecting the conductor and the spacer, wherein the snap off distance is varied according as the distributing member moves along the substrate.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: February 16, 1999
    Assignee: Micron Display Technology, Inc.
    Inventor: Darryl Stansbury
  • Patent number: D426092
    Type: Grant
    Filed: November 2, 1998
    Date of Patent: June 6, 2000
    Assignee: Display Technologies
    Inventor: Craig Allen Neustadt