Patents Examined by Bipin H. Shalwala
  • Patent number: 6172662
    Abstract: The present invention: (1) divides a selection period into a plurality of sub-selection periods (t11, t21, t31, t41), and distributes these sub-selection periods throughout the period in one frame; (2) further divides a sub-selection period into a plurality of divided sub-selection periods ((s1, s2), (s3, s4), (s5, s6), (s7, s8)), and switches electric potentials of the selection signals between divided sub-selection period in order to eliminate the effects of spikes in voltage from the scanning signals to be applied to adjacent scanning electrodes, and applies these features to commonly known multi-line driving method.
    Type: Grant
    Filed: April 18, 1996
    Date of Patent: January 9, 2001
    Assignee: Seiko Epson Corporation
    Inventors: Akihiko Ito, Takashi Kurumisawa
  • Patent number: 6151013
    Abstract: An improved position responsive sensor is disclosed comprising a substrate having first and second parallel, conductive strips at the edges in electrical contact with high resistance coating on the top surface and low resistance coating on the bottom surface respectively. A d. c. voltage is applied to the top surface of substrate, at the same time an a. c. voltage is applied to the bottom surface. An electrical conductive probe or a flexible resistive sheet is used to detected both d. c. and a. c. voltage between the contact point and the ground, whereby the electrical output signals are accurately related to the x and y coordinates of the contacted point on the top surface of substrate.
    Type: Grant
    Filed: November 3, 1997
    Date of Patent: November 21, 2000
    Assignee: Sentech
    Inventor: Jianming Huang
  • Patent number: 6127996
    Abstract: A ferroelectric liquid crystal display comprises a layer of ferroelectric liquid crystal material contained between two cell walls, surface treated to align the material in a tilted layer. The walls carry eg row and column electrodes forming an x,y matrix of addressable elements or pixels. Multiplex addressing voltages are provided by driver circuits. An improved addressing is obtained by varying the addressing voltage applied during switching of a pixel to maximize torque applied on liquid crystal molecules. Addressing voltages are from two data waveforms and one strobe waveform; the data waveforms have more than two voltage levels, dc balance, and equivalent rms. values; the strobe waveform has two or more voltage levels (which may include a zero level). The strobe and data waveforms combine to provide a resultant voltage that form an addressing voltage at each pixel.
    Type: Grant
    Filed: September 17, 1997
    Date of Patent: October 3, 2000
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: John C. Jones, Jonathan R. Hughes, Marie H. Anderson
  • Patent number: 6121946
    Abstract: A waveform scan system produces two pairs of special waves with special waveforms that are led to front and rear layers of an electrically-conducting media which contains three overlaid layers. In there they form special stationary waveforms which contains a vertical and a horizontal maximum peak lines. These two peak line cross in space and their perpendicular line present a maximum peak point. Under a control unit, this maximum peak point will scan whole screen media and synchronize with incoming signals. The middle layer connect to the signals processor that allows signals to be converted or be reproduced therein. Thereby the time domain serial signals can be reproduced in different locations in the space domain. Vice versa, the space domain signals can be convert or record in a time domain media.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: September 19, 2000
    Inventor: Xing Liang Shen
  • Patent number: 6091388
    Abstract: A driving method for an optical modulation device is applicable to driving of an optical modulation device, e.g. a liquid crystal device having a matrix electrode arrangement comprising a group of scanning electrodes, a group of signal electrodes oppositely spaced from the group of scanning electrodes, and an optical modulation material (e.g. a liquid crystal) showing bistability with respect to an electric filed applied thereto disposed between the groups of scanning electrodes and signal electrodes.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: July 18, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junichiro Kanbe, Kazuharu Katagiri, Syuzo Kaneko
  • Patent number: 6084556
    Abstract: A virtual computer monitor is described which enables instantaneous and intuitive visual access to large amounts of visual data by providing the user with a large display projected virtually in front of the user. The user wears a head-mounted display containing a head-tracker, which together allow the user to position an instantaneous viewport provided by the head-mounted display at any position within the large virtual display by turning to look in the desired direction. The instantaneous viewport further includes a mouse pointer, which may be positioned by turning the user's head, and which may be further positioned using a mouse or analogous control device. A particular advantage of the virtual computer monitor is intuitive access to enlarged computer output for visually-impaired individuals.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: July 4, 2000
    Assignee: Vega Vista, Inc.
    Inventor: Arthur L. Zwern
  • Patent number: 6084568
    Abstract: A device performs both 2-tap and 3-tap flicker filtering of non-interlaced lines of computer graphics data to form interlaced lines. The device includes a data packer, a data unpacker, and a filter circuit. The filter circuit combines lines that it receives to form filtered lines. The data packer writes the filtered lines to line buffers while the data unpacker reads the lines stored in the line buffers. The read lines are either sent to the filter circuit for further filtering or are outputted to be displayed as interlaced lines. Both 2-tap and 3-tap flicker filtering can be accomplished by varying the order and/or number of read, write, and filter operations.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: July 4, 2000
    Assignee: S3 Incorporated
    Inventors: Reena Premi, William S. Herz, Ignatius B. Tjandrasuwita
  • Patent number: 6081251
    Abstract: An apparatus for managing picture data receives picture data representing a number of pictures at different times, generates a time code indicating the time of receipt of each picture, and stores the received picture data with a header that includes the time code. In order to retrieve selected pictures, retrieval parameter information is entered to indicate a selected time period, and the picture data that was received during the selected time period is retrieved. The apparatus also forms reduced size picture data for each received picture and stores the reduced size picture data in the header together with the time code for the corresponding picture. Upon retrieving selected ones of the stored pictures, the corresponding reduced size picture data is used to display simultaneously several reduced size pictures representing the pictures that have been retrieved.
    Type: Grant
    Filed: May 9, 1995
    Date of Patent: June 27, 2000
    Assignee: Sony Corporation
    Inventors: Yorihiko Sakai, Osamu Ota, Kouhei Sakura
  • Patent number: 6046711
    Abstract: An image display device for arbitrarily switching a display area includes a drive signal supply device for supplying drive signals for pixels arranged in a matrix-like fashion, in response to the generation of predetermined signals, in signal lines of rows and columns corresponding to the pixels, and sequential signal output devices for sequentially outputting the predetermined signals from a signal line of a predetermined start row or column to the signal lines of rows or columns at least with respect to either the rows or columns. The sequential signal output devices are equipped with a switching device for switching the start row or column.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: April 4, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventor: Tetsunobu Kouchi
  • Patent number: 6043804
    Abstract: A color space converter (100) is disclosed. The color space converter includes an input data MUX (110), a first and second look-up table (LUT) (104 and 106), an arithmetic logic unit (ALU) (108), and an output MUX (112). In a standard indexed color look-up mode, indexed pixel data are coupled to the LUTs (104 and 106) each of which provides direct color data to the output MUX (112). Depending upon a control signal, the output MUX (112) couples one of the direct color lines to an output. In a color conversion mode, the LUTs (104 and 106) store conversion constants. Input pixel data of a first color space format is coupled to the LUTs (104 and 106) and the ALU (108). The resulting conversion constants output from the LUTs (104 and 106) are added with portions of the input pixel data in the ALU (108) to generate direct color data of a second color space format.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: March 28, 2000
    Assignee: Alliance Semiconductor Corp.
    Inventor: Spencer H. Greene
  • Patent number: 6034660
    Abstract: A processing system for a spatial light modulator in the form of an array of deformable mirror devices receives a gamma-corrected, color component, video input signal. The input signal is converted to pixel data which is then converted to RGB data. A de-gamma processor removes all or part of the gamma-correction of the pixel data to match the data to the form of the spatial light modulator.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: March 7, 2000
    Assignee: Digital Projection Limited
    Inventors: John David Millward, John Gillespie
  • Patent number: 6031511
    Abstract: A two dimensional display panel produces a time variable image composed of light emitting pixels. The pixels are generated by a light emitting phosphor distributed within the panel, the pixels radiate light in response to being excited by charging and triggering energy beams. The energy beams are relatively invisible and may be generated by lasers or solid state diode energy sources. Wave guides within the panel direct the energy beams to the pixels. The wave guides may be composed of fiber optic threads and the display panel comprised of a fabric of woven fiber optic threads wherein pixels are produced at intersections of the woven fiber optic threads.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: February 29, 2000
    Inventors: Michael J. DeLuca, Joan S. DeLuca
  • Patent number: 6016137
    Abstract: A method and apparatus which produces a semitransparent cursor for a video display presenting simultaneous viewing access to both the cursor and the underlying image information. At the on-screen location of the cursor, the viewer is able to simultaneously view and distinguish between the cursor and the underlying graphical data. In one form, the method includes the steps of obtaining the red, green, and blue video pixel data for each pixel representing at least a portion of the cursor; halving the numerical value of each datum of red, green, and blue video pixel data; injecting a binary value into the most significant bit of each datum to obtain modified red, green, and blue video pixel data; and providing modified red, green, and blue video pixel data to a video display.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: January 18, 2000
    Assignee: International Business Machines Corporation
    Inventors: Edward Kelley Evans, Andrew Anthony Long, Roderick Michael Peters West
  • Patent number: 6014116
    Abstract: An electroluminescent display system for displaying images having an electroluminescent display unit with a plurality of electroluminescent pixels, a receiver for receiving a signal that contains information regarding an image to be displayed on the unit, a signal processor for processing the information contained in the signal and a signal cable to convey the processed signal to the electroluminescent display so as to activate selected pixels. Because of its light weight, small size and flexibility, the electroluminescent display system is conformable to any shaped surfaces and transportable.
    Type: Grant
    Filed: August 28, 1997
    Date of Patent: January 11, 2000
    Assignee: Add-Vision, Inc.
    Inventors: Bryan D. Haynes, Mark Lipsky, Jay Sarno
  • Patent number: 6014474
    Abstract: An operation of an iris filter is carried out on an original image signal representing an image, and the degree of centralization of gradients of the original image signal with respect to a picture element is thereby calculated, each of picture elements constituting the image being taken as the picture element. An image portion, which is associated with a high degree of centralization, in the image is detected in accordance with the calculated degree of centralization. Image emphasis processing is then selectively carried out on the detected image portion. Alternatively, a morphology operation is carried out on an original image signal Dorg by using a multiply structure element Bi and a scale factor .lambda., and a morphology signal Dmor is thereby obtained.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: January 11, 2000
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideya Takeo, Masahiko Yamada, Nobuyoshi Nakajima
  • Patent number: 6011529
    Abstract: In a light-emitting element drive circuit in an active matrix display device, at least one current-control transistor controls a current flowing through a light-emitting element. The current-control transistor and the light-emitting element are connected in parallel to each other. A constant current source is connected to a junction between one electrode of the light-emitting element and one electrode of the transistor through which the current 8s controlled to flow. The other electrodes of the light-emitting element and the transistor are connected to a common electrode which may be grounded via a resistor. In other configuration, it may be arranged that the light-emitting element and a capacitance are connected in parallel to each other. In this case, the current-control transistor is connected to a junction between the light-emitting element and the capacitance so as to use charging and discharging operations of the capacitance for driving the light-emitting element.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: January 4, 2000
    Assignee: NEC Corporation
    Inventor: Naoyasu Ikeda
  • Patent number: 6011535
    Abstract: A scanning circuit for a display device having an array of pixels. One embodiment of the scanning circuit includes L scan control signal lines, first logic circuits to operate on signals from M of the L scan control signal lines, flip-flop circuits communicating with the first logic circuits, N timing control signal lines, and second logic circuits coupled to operate on signal from the N timing control signal lines and the flip-flop circuits.
    Type: Grant
    Filed: November 5, 1996
    Date of Patent: January 4, 2000
    Assignees: Semiconductor Energy Laboratory Co., Ltd., Sharp Kabushiki Kaisha
    Inventors: Kenichi Katoh, Yasushi Kubota, Hidehiko Chimura, Jun Koyama
  • Patent number: 6009212
    Abstract: An apparatus and method for image registration involves computing a first transform based on landmark manifolds, using a distance measure, computing a second transform from the distance measure and the first transform. Registering the images is accomplished by applying the second transform.
    Type: Grant
    Filed: July 10, 1996
    Date of Patent: December 28, 1999
    Assignee: Washington University
    Inventors: Michael I. Miller, Gary E. Christensen, Sarang C. Joshi, Ulf Grenander
  • Patent number: 6005548
    Abstract: The invention relates to methods and systems for determination of position and orientation of users in a space and display of virtual space, and can be used in interactive computer games, health-strengthening teaching devices, or trainings of the athletic and military purposes. The invention provides an improved accuracy and speed of tracking of the user's spatial position and orientation, provides convenience for and naturalness of his/her movements and representation of virtual space in conformity with user's movements in the real space. Sensors 4 for tracking angular position of segments 2 of the user's locomotor system are attached at places of articulations 3 of segments 2 and at certain segments 2 proper. At least at one of segments 2 arranged are main means 5 for determination of reference directions, which means provide determination of orientation of a given segment relative to the reference directions.
    Type: Grant
    Filed: August 14, 1997
    Date of Patent: December 21, 1999
    Inventors: Nurakhmed Nurislamovich Latypov, Nurulla Nurislamovich Latypov
  • Patent number: 6005534
    Abstract: The invention relates to a digital information system (10) for displaying information on at least one display means with the aid of at least one projector (22). The exposures are presented at places accessible to and frequented by a general public. The information system (10) includes external information mediators (24) and information is controlled dynamically through the medium of a communication interface (26) and through the medium of an exposure handler in a central computer (28). The inventive system also includes a communication interface (14) against an elective number of station computers (34) having connected projector computers (38) which control projectors (22) for displaying pictures or exposures. The station computers (34) and peripheral equipment are situated at mutually distanced places.
    Type: Grant
    Filed: July 2, 1996
    Date of Patent: December 21, 1999
    Assignee: Dahlgren, Hylin & Jonason Media AB
    Inventors: Mats Hylin, Mats Dahlgren, Joakim Jonasson