Patents Assigned to Kopin Corporation
  • Portable display system with memory card reader
    Patent number: 6476784
    Abstract: An active matrix color sequential liquid crystal display has an active matrix circuit, a counterelectrode panel and an interposed layer of liquid crystal. The active matrix circuit has an array of transistor circuits formed in a first plane. Each transistor circuit is connected to a pixel electrode in an array of pixel electrodes having a small area. The display is housed in a portable display device having a docking port for a memory card used to input video data for the display.
    Type: Grant
    Filed: January 8, 1998
    Date of Patent: November 5, 2002
    Assignee: Kopin Corporation
    Inventors: Matthew Zavracky, Jeffrey Jacobsen, Frederick P. Herrmann, Wen-Foo Chern, Hiap L. Ong, John C. C. Fan, Bor-Yeu Tsaur, Alan Richard
  • Monocular head-mounted display system
    Patent number: 6452572
    Abstract: A monocular head mounted display system in which a matrix display element is mounted within a housing that is positioned relative to one eye of the user to display information. The display is connected to a video or information source such that the user can view information or images shown on the display. The display can be mounted to a frame so that the user can move the display in and out of the user's filed of view without adjusting the supporting harness that holds the display on the user's head.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: September 17, 2002
    Assignee: Kopin Corporation
    Inventors: John C. C. Fan, Jeffrey Jacobsen, Peter A. Ronzani, Stephen Pombo
  • Microdisplay viewer
    Patent number: 6452577
    Abstract: A display viewer has an electronic display including an array of pixel electrodes having an area of less than 400 mm2. A light source can be used to illuminate the array of pixel electrodes of a liquid crystal display in a preferred embodiment. The viewer has a lens system that enlarges an image on the display and can also include a mirror that reflects the enlarged image from the lens. A display viewer in a preferred embodiment has a planar mirror and a viewing screen. The viewing screen has a diffuser and a Fresnel lens through which the image is viewed.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: September 17, 2002
    Assignee: Kopin Corporation
    Inventors: Ronald P. Gale, Gary J. Swanson
  • Method of preparing indium phosphide heterojunction bipolar transistors
    Publication number: 20020125498
    Abstract: InP heterojunction bipolar transistors having a base layer of InGaAs which are compositionally graded to engineer the bandgap of the base layer to be larger at the emitter/base junction than at the collector/base junction. The graded bandgap can increase DC current gain and speed of the device. A metalorganic chemical vapor deposition method of preparing InP heterojunction bipolar transistors having a base layer with a relatively high concentration of carbon dopant. The high carbon dopant concentration lowers the base sheet resistivity and turn-on voltage of the device.
    Type: Application
    Filed: January 8, 2002
    Publication date: September 12, 2002
    Applicant: Kopin Corporation
    Inventors: Roger E. Welser, Paul M. Deluca, Barbara E. Landini
  • Head-mounted matrix display
    Patent number: 6448944
    Abstract: A compact, light weight head mounted display in which a pair of matrix display elements are mounted within a housing. The display utilizes a pair of arms or stems that are rotatable mounted to the housing such that the user can pivot each arm from a folded position into an open position. The arms can be spring mounted onto the housing to secure the display to the user's head and can also incorporate earphones that can be retracted into each arm when not in use.
    Type: Grant
    Filed: July 20, 1998
    Date of Patent: September 10, 2002
    Assignee: Kopin Corporation
    Inventors: Peter A. Ronzani, Stephen Pombo, Jeffrey Jacobsen
  • Active matrix liquid crystal display device
    Patent number: 6449023
    Abstract: A transmissive active matrix liquid crystal display device has a multievel optical phase element that sepaeates each color component of light into a plurality of diffraction orders. The multilevel optical phase element is aligned with a an active matrix array and directs light of different colors through different pixels of a liquid crystal material. The transmission of light through the liquid crystal material is controlled by an array of transistor circuits that actuate pixel electrodes.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: September 10, 2002
    Assignees: Massachusetts Institute of Technology, Kopin Corporation
    Inventors: Gary J. Swanson, Ronald P. Gale
  • Biopolar transistor with lattice matched base layer
    Publication number: 20020121674
    Abstract: A semiconductor material which has a high carbon dopant concentration and is composed of gallium, indium, arsenic and nitrogen is disclosed. The material is useful in forming the base layer of gallium arsenide based heterojunction bipolar transistors because it can be lattice matched to gallium arsenide by controlling the concentration of indium and nitrogen. The disclosed semiconductor materials have a low sheet resistivity because of the high carbon dopant concentration obtained.
    Type: Application
    Filed: November 27, 2001
    Publication date: September 5, 2002
    Applicant: Kopin Corporation
    Inventors: Roger E. Welser, Paul M. Deluca, Noren Pan
  • Display housing
    Publication number: 20020105616
    Abstract: Alignment of an imaging area of a display with a user's eye provides optimum image quality for the user. Typically, a display is formed of a display panel encased within a carrier. The carrier is used to mechanically align the display panel within a device housing. However, the display panel must first be aligned within the carrier and the carrier and display combination aligned within a device housing. By utilizing the display panel without the carrier, one alignment step is removed from the installation process. Placing the display panel within a housing having an alignment device ensures proper alignment of an imaging area of the display panel with an opening of the housing.
    Type: Application
    Filed: December 17, 2001
    Publication date: August 8, 2002
    Applicant: Kopin Corporation
    Inventors: Matthew Zavracky, Rodney J. Bumgardner, Lawrence Cuprys
  • High Density electronic circuit modules
    Patent number: 6424020
    Abstract: The invention relates to device processing, packaging and interconnects that will yield integrated electronic circuitry of higher density and complexity than can be obtained by using conventional multi-chip modules. Processes include the formation of complex multi-function circuitry on common module substrates using circuit tiles of silicon thin-films which are transferred, interconnected and packaged. Circuit modules using integrated transfer/interconnect processes compatible with extremely high density and complexity provide large-area active-matrix displays with on-board drivers and logic in a complete glass-based modules. Other applications are contemplated, such as, displays, microprocessor and memory devices, and communication circuits with optical input and output.
    Type: Grant
    Filed: December 29, 1997
    Date of Patent: July 23, 2002
    Assignee: Kopin Corporation
    Inventors: Duy-Pach Vu, Brenda Dingle, Ngwe Cheong
  • Head-mounted matrix display
    Patent number: 6424321
    Abstract: A compact, light weight head mounted display in which a pair of matrix display elements are mounted within a housing. The display utilizes a pair of arms or stems that are rotatable mounted to the housing such that the user can pivot each arm from a folded position into an open position. The arms can be spring mounted onto the housing to secure the display to the user's head and can also incorporate earphones that can be retracted into each arm when not in use.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: July 23, 2002
    Assignee: Kopin Corporation
    Inventors: Peter A. Ronzani, Jeffrey Jacobsen, Stephen Pombo, Rodney Bumgardner
  • Method of transferring semiconductors
    Patent number: 6414783
    Abstract: A display panel is formed using essentially single crystal thin-film material that is transferred to substrates for display fabrication. The transfer includes the step of transferring the semiconductor regions onto a stretchable substrate. The resulting circuit panel can be incorporated into a display panel with a light emitting or liquid crystal material to provide the desired display.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: July 2, 2002
    Assignee: Kopin Corporation
    Inventors: Paul M. Zavracky, John C. C. Fan, Robert McClelland, Jeffrey Jacobsen, Brenda Dingle
  • Method of making light emitting diode displays
    Patent number: 6403985
    Abstract: Light emitting diodes (LEDs) and LED bars and LED arrays formed of semiconductive material, such as III-V, and particularly AlGaAs/CaAs material, are formed in very thin structures using organometallic vapor deposition (OMCVD). Semiconductor p-n junctions are formed as deposited using carbon as the p-type impurity dopant. Various lift-off methods are described which permit back side processing when the growth substrate is removed and also enable device registration for LED bars and arrays to be maintained.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: June 11, 2002
    Assignee: Kopin Corporation
    Inventors: John C. C. Fan, Brenda Dingle, Shambhu Shastry, Mark B. Spitzer, Robert W. McClelland
  • Efficient illumination system for color projection displays
    Patent number: 6392806
    Abstract: A method and system for providing an improved color image wherein a broad spectrum light is supplied to a phase grating which provides dispersed light having multiple diffraction orders. The dispersed light is supplied to a zero-order phase shifter which shifts the phase of the undiffracted (zero order) light relative to the diffracted light. The light from the phase shifter is thereupon concentrated so that the plane of the phase grating is imaged onto a display having a plurality of pixels assigned to transmit different spectral regions. The depths of the grating elements of each of the grating periods of the phase grating and the depth of the zero-order phase element of the phase shifter are selected to maximize the area of chromaticity space spanned by the different spectral regions at the display.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: May 21, 2002
    Assignee: Kopin Corporation
    Inventor: Gary J. Swanson
  • Wireless communication device having a color sequential display
    Publication number: 20020030649
    Abstract: A color active matrix display system allows random access of pixel electrodes. The control electronics is fabricated with the active matrix circuitry using single crystal silicon technology. The control electronics includes a random access data scanner and random access spec scanners. By selectively actuating pixel electrodes in the active matrix display region, compressed video information can be directly displayed on the active matrix display panel. Color stripes are used to generate sequential color systems to produce a color image from the active matrix display panel.
    Type: Application
    Filed: July 20, 2001
    Publication date: March 14, 2002
    Applicant: Kopin Corporation
    Inventors: Matthew Zavracky, Wen-Foo Chern, Ronald Gale, Peter A. Ronzani, Stephen Pombo
  • Timing of fields of video
    Publication number: 20020030659
    Abstract: An apparatus and method to delay a field of video by one row in a two field frame to reduce DC build-up or stick caused by textual image.
    Type: Application
    Filed: February 22, 2001
    Publication date: March 14, 2002
    Applicant: Kopin Corporation
    Inventors: Matthew M. Zavracky, David L. Ellertson
  • Control system for display panels
    Patent number: 6320568
    Abstract: A control apparatus for an active matrix liquid crystal display device is fabricated with the active matrix as a single integrated SOI circuit. The control apparatus and the active matrix are lifted from a silicon substrate and transferred to a glass substrate as a single piece. The control apparatus comprises a video interface, a column driver, and dual row drivers. The video interface operates the active matrix as a multiple-frequency scanning display device. The column driver comprises dual shift register arrays, one array coupled to the even columns and the other array coupled to the odd columns. The even and odd columns operate at opposite polarities. The respective polarities are reversed on every frame by a polarity switch the polarity switch coupled to a video signal amplifier. The control apparatus further comprises sensors for generating a gray-scale feedback signal to adjust the amplifier gain.
    Type: Grant
    Filed: December 27, 1994
    Date of Patent: November 20, 2001
    Assignee: Kopin Corporation
    Inventor: Matthew Zavracky
  • Single crystal silicon arrayed devices with optical shield between transistor and substrate
    Patent number: 6317175
    Abstract: A display panel is formed using a single crystal thin-film transistors that are transferred to substrates for display fabrication. Pixel arrays form light valves or switches that can be fabricated with control electronics in the thin-film material prior to transfer. The resulting circuit panel is then incorporated into a projection display system with a light emitting or liquid crystal material to provide the desired light valve.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 13, 2001
    Assignee: Kopin Corporation
    Inventors: Jack P. Salerno, Paul M. Zavracky, Mark B. Spitzer, Brenda Dingle
  • Method of transferring semiconductors
    Publication number: 20010019371
    Abstract: A display panel is formed using essentially single crystal thin-film material that is transferred to substrates for display fabrication. The transfer includes the step of transferring the semiconductor regions onto a stretchable substrate. The resulting circuit panel can be incorporated into a display panel with a light emitting or liquid crystal material to provide the desired display.
    Type: Application
    Filed: March 20, 2001
    Publication date: September 6, 2001
    Applicant: Kopin Corporation
    Inventors: Paul M. Zavracky, John C. C. Fan, Robert McClelland, Jeffrey Jacobsen, Brenda Dingle
  • Wireless phone with microdisplay
    Patent number: D454848
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: March 26, 2002
    Assignee: Kopin Corporation
    Inventor: Rodney Bumgardner
  • Liquid crystal display holder
    Patent number: D464971
    Type: Grant
    Filed: July 7, 1998
    Date of Patent: October 29, 2002
    Assignee: Kopin Corporation
    Inventor: Stephen A. Pombo