Patents by Inventor Ravin Balakrishnan

Ravin Balakrishnan 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).

  • Publication number: 20030142092
    Abstract: The present invention is a widget display system for a volumetric or true three-dimensional (3D) display that provides a volumetric or omni-viewable widget that can be viewed and interacted with from any location around the volumetric display. The widget can be viewed from any location by duplicating the widget such that all locations around the display are within the viewing range of the widget. A widget can be provided with multiple viewing surfaces or faces making the widget omni-directional. A widget can be continuously rotated to face all of the possible locations of users over a period of time. User locations can be determined and the widget can be oriented to face the users when selected.
    Type: Application
    Filed: June 28, 2002
    Publication date: July 31, 2003
    Applicant: Silicon Graphics, Inc.
    Inventors: George William Fitzmaurice, Ravin Balakrishnan, Gordon Paul Kurtenbach
  • Publication number: 20030142067
    Abstract: The present invention is a system that allows a number of 3D volumetric display or output configurations, such as dome, cubical and cylindrical volumetric displays, to interact with a number of different input configurations, such as a three-dimensional position sensing system having a volume sensing field, a planar position sensing system having a digitizing tablet, and a non-planar position sensing system having a sensing grid formed on a dome. The user interacts via the input configurations, such as by moving a digitizing stylus on the sensing grid formed on the dome enclosure surface. This interaction affects the content of the volumetric display by mapping positions and corresponding vectors of the stylus to a moving cursor within the 3D display space of the volumetric display that is offset from a tip of the stylus along the vector.
    Type: Application
    Filed: June 28, 2002
    Publication date: July 31, 2003
    Applicant: Silicon Graphics, Inc.
    Inventors: Gordon Paul Kurtenbach, George William Fitzmaurice, Ravin Balakrishnan
  • Publication number: 20030142144
    Abstract: The present invention is a system that creates a volumetric display and a user controllable volumetric pointer within the volumetric display. The user can point by aiming a beam which is vector, planar or tangent based, positioning a device in three-dimensions in association with the display, touching a digitizing surface of the display enclosure or otherwise inputting position coordinates. The cursor can take a number of different forms including a ray, a point, a volume and a plane. The ray can include a ring, a bead, a segmented wand, a cone and a cylinder. The user designates an input position and the system maps the input position to a 3D cursor position within the volumetric display. The system also determines whether any object has been designated by the cursor by determining whether the object is within a region of influence of the cursor. The system also performs any function activated in association with the designation.
    Type: Application
    Filed: June 28, 2002
    Publication date: July 31, 2003
    Applicant: Silicon Graphics, Inc.
    Inventors: Ravin Balakrishnan, Gordon Paul Kurtenbach, George William Fitzmaurice
  • Patent number: 6115028
    Abstract: An input system for controlling the position or motion of a cursor, three dimensions that uses x, z position for inputting two coordinates and tilt in a plane (x-y or z-y) to input a third (and possibly a fourth coordinate). The invention is moved about on a surface for inputting two of the dimensions and tilted to input the third. The amount or degree of tilt and the direction of tilt controls the input of the third dimension. The base of the hand held device is curved so that the device can be tilted even while it is moved in two dimensions along the surface of the tablet. Tilting can be along two orthogonal axes allowing the device to input four coordinates if desired. The coil can also have switched resistors controlled by mouse buttons connected to it which the tablet can sense being activated to allow clutching and selection operations like those of a conventional mouse.
    Type: Grant
    Filed: August 22, 1996
    Date of Patent: September 5, 2000
    Assignee: Silicon Graphics, Inc.
    Inventors: Ravin Balakrishnan, Thomas P. H. Baudel, Gordon P. Kurtenbach, George W. Fitzmaurice