Patents by Inventor Sheue-Ling Lien

Sheue-Ling Lien 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).

  • Method and apparatus for deriving instantaneous reciprocals of the homogenous coordinate w for use in defining images on a display
    Patent number: 5179659
    Abstract: An adaptive forward differencing apparatus, wherein, when rendering curves, calculated x, y values are increased or decreased in order to create values which correspond to the next pixel of the display CRT, such that curves of substantially one pixel increments are continuously and uniformly generated. The apparatus also provides circuitry for generating coordinates of display elements which approximate an ideal vector and to define curves, vectors or objects within maximum and minimum coordinates of the CRT display. The apparatus also provides efficient circuitry for computing the value of 1/w of the homogenous coordinate w.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: January 12, 1993
    Assignee: Sun Microsystems, Inc.
    Inventors: Sheue-Ling Lien, Jerald R. Evans, Susan E. Carrie
  • Method and apparatus for adaptive forward differencing in the rendering of curves and surfaces
    Patent number: 5125073
    Abstract: An adaptive forward differencing apparatus wherein, when rendering curves, calculated x, y values are increased or decreased in order to create values which correspond to the next pixel of the display CRT, such that curves of substantially one pixel increments are continuously and uniformly generated. The apparatus also provides circuitry for generating coordinates of display elements which approximate an ideal vector and to define curves, vectors or objects within maximum and minimum coordinates of the CRT display. The present invention also provides efficient circuitry for computing the value of 1/w of the homogenous coordinate w.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: June 23, 1992
    Assignee: Sun Microsystems, Inc.
    Inventors: Sheue-Ling Lien, Michael J. Shantz, Serdar Ergene, Vaughan R. Pratt, Jerald R. Evans
  • Method and apparatus for shading images
    Patent number: 5063375
    Abstract: The present invention provides unique methods and apparatus for shading curves, polygons and patches, implementing Phong, Gouraud and other shading techniques in the rendering of images on a cathode ray tube or other display device. The present invention also includes a unique method and apparatus for shading patches by rendering a series of adjacent curves such that no pixel gaps exist between each rendered curve.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: November 5, 1991
    Assignee: Sun Microsystems, Inc.
    Inventors: Sheue-Ling Lien, Michael J. Shantz, Susan E. Carrie, Jim V. Loo, David Elrod
  • Method and apparatus for rendering vectors using bresenham parameters
    Patent number: 4855935
    Abstract: An adaptive forward differencing apparatus wherein, when rendering curves, calculated x, y values are increased or decreased in order to create values which correspond to the next pixel of the display CRT, such that curves of substantially one pixel increments are continuously and uniformly generated. The apparatus of the present invention also provides circuitry for generating coordinates of display elements which approximate an ideal vector and to define curves, vectors or objects within maximum and minimum coordinates of the CRT display. The present invention also provides efficient circuitry for computing the value of 1/w of the homogenous coordinate w.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: August 8, 1989
    Assignee: Sun Microsystems, Inc.
    Inventors: Sheue-Ling Lien, Michael J. Shantz, Jerald R. Evans, Serdar Ergene, Susan E. Carrie