Patents Examined by Rudolph Buchez
  • Patent number: 5768491
    Abstract: A computer system includes a display controller which supports video display. The display controller includes circuitry for determining which portions of one or more video windows should be written to the frame buffer responsive to the locations of other screen objects which may overlie the video window on the display. An unused portion of frame buffer memory is used to stored a plurality of transition groups, each group defining which portions of the video window are visible within a range of scanlines. The transition information is used by clipped circuitry to enable or disable writing of video information to the frame buffer.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 16, 1998
    Assignee: Compaq Computer Corporation
    Inventors: Mark A. Lobodzinski, Kai-Fat Fong
  • Patent number: 5644687
    Abstract: A solid model of each part within an electronic package is created and assigned at least one non-geometrical property. For example, this may comprise automatically extracting information from a printed circuit board design tool and creating solid models of a printed circuit board and the parts thereon. Thereafter, each solid model is subdivided into multiple finite control volumes. A plurality of boundary conditions are automatically established for each of the multiple finite control volumes of each part using that part's non-geometrical property. Thermal analysis may then be performed on the electronic package using the boundary conditions for each finite control volume of each solid model of each part contained therewithin.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: July 1, 1997
    Assignee: International Business Machines Corporation
    Inventors: Dereje Agonafer, Arnold Ojars Vimba
  • Patent number: 5583973
    Abstract: A method, performed on a computer (10), for generating representations of a molecule, both two- and three-dimensional, is provided. The method includes establishing X, Y, and Z coordinate axes for the molecule to be modeled such that a rectangular region is established with sides parallel to the coordinate axes. The method also includes establishing a grid of coordinates on the X, Y, and Z coordinates axes with a grid mesh size of sufficient resolution to identify atom points of the molecule and solvent points. Next, the method includes identifying surface points which form a trace in one dimension in each Z cross-section, and generating tracing instructions for each Z cross-section by tracing along the surface points in the trace in each Z cross-section and writing the X, Y coordinates to instructions for controlling a computer display or for controlling a computer controlled milling machine.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: December 10, 1996
    Assignee: Trustees of Boston University
    Inventors: Charles DeLisi, James L. Cornette, Benjamin L. King, Michael D. Silverman
  • Patent number: 5566279
    Abstract: A three-dimensional image processing apparatus and method wherein a three-dimensional digital image in a three-dimensional memory is cut and read out to perform image processing. Addresses of a two-dimensional digital differential analyzer are first calculated by ray tracing in a direction of a vector on one plane of a three plane coordinate system of a three-dimensional coordinate system, and then data of voxel columns, arranged perpendicularly to the one plane coordinate system in the three-dimensional space along straight lines perpendicular to the ray at the addresses, are read out in units of a column for the individual voxel columns from the three-dimensional memory. A pair of three-dimensional memories are utilized, and a writing operation of a three-dimensional digital image into one of the three-dimensional memories and a reading out operation of the voxel columns from the other three-dimensional memory are performed simultaneously in a parallel relationship.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: October 15, 1996
    Assignee: NEC Corporation
    Inventor: Yoichi Katayama
  • Patent number: 5566283
    Abstract: A computer graphic image generating apparatus for generating an image based on a computer graphic model including shape information, camera information, camera position information, object position information, texture information, light source information and mapping information which includes texture image information. The apparatus includes a storage device, or memory, and means for calculating the amount of space in the storage device required to store all the information used to generate an image. The apparatus also includes means for storing the information for an image in the storage device without wasting any storage space. The apparatus also includes means for converting image information created for a first image generating system having a first shading calculation system into image information usable on a second image generating system having a different shading calculation system.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: October 15, 1996
    Assignee: Dainippon Printing Co., Ltd.
    Inventors: Toshio Modegi, Hideki Murota, Michio Kurata