Patents by Inventor Dean C. Chang

Dean C. Chang 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).

  • Patent number: 6310605
    Abstract: A force feedback interface and method providing a selective disturbance filter for providing selective reduction or elimination of displayed disturbances associated with output force sensations. A force feedback interface device is connected to a host computer that displays a graphical environment. The interface device includes a user manipulatable object, a sensor for detecting movement of the user object, and an actuator to apply output forces to the user object. A microprocessor outputs controlling force signals to the actuator, receives sensor signals from the sensors and reports locative data to the host computer indicative of the movement of the user object. The host computer updates a position of a displayed user-controlled graphical object in the graphical environment based on the reported data.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: October 30, 2001
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Dean C. Chang
  • Patent number: 6300936
    Abstract: A force feedback system provides components for use in a force feedback system including a host computer and a force feedback interface device. An architecture for a host computer allows multi-tasking application programs to interface with the force feedback device without conflicts, where a single active application may output forces. A background application also provides force effects to be output and allows a user to assign force effects to graphical objects in a graphical user interface. Force feedback effects and structures are further described, such as events and enclosures.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: October 9, 2001
    Assignee: Immersion Corporation
    Inventors: Adam C. Braun, Jonathan L. Beamer, Louis B. Rosenberg, Dean C. Chang
  • Patent number: 6292170
    Abstract: A design interface tool for designing force sensations for use with a host computer and force feedback interface device. A force feedback device is connected to a host computer that displays the interface tool. The user selects a type of force sensation and designs and defines physical characteristics of the selected force sensation using the interface tool. A graphical representation of the characterized force sensation is displayed. The user can include a plurality of force sensations in a compound force sensation, where the compound sensation is graphically displayed to indicate the relative start times and duration of each of the force sensations. The user can also easily adjust the start times and durations of the force sensations using the graphical representation. The force sensations are output to a user manipulandum of a force feedback device to be felt by the user, where the graphical representation is updated in conjunction with the output of the force sensation.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: September 18, 2001
    Assignee: Immersion Corporation
    Inventors: Dean C. Chang, Louis B. Rosenberg, Jeffrey R. Mallett
  • Patent number: 6292174
    Abstract: An interface device and method for providing enhanced cursor control with force feedback. A force feedback interface device includes a manipulandum, such as a mouse, that is moveable in a local workspace. The device is coupled to a host computer that displays a cursor in a graphical environment, such as a GUI, on a display screen. An interior region and a border region in the local workspace is defined. One mapping of device movement to cursor movement is used for the interior region, and a different mapping is used for the border region. Mapping methods include ballistics, absolute, linear, rate control, and variable absolute. Rate control embodiments can be single axis or dual axis. In one embodiment, when the mouse moves from the interior region to the border region, the mapping providing the greater cursor velocity is used to better conserve device workspace in the direction of travel and to decrease any sense of mapping mode change to the user.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: September 18, 2001
    Assignee: Immersion Corporation
    Inventors: Jeffrey R. Mallett, Dean C. Chang, Louis B. Rosenberg, Adam C. Braun, Kenneth M. Martin, Jonathan L. Beamer
  • Patent number: 6288705
    Abstract: An interface device and method for providing indexing cursor control with force feedback. A force feedback interface device includes a manipulandum, such as a mouse, that is moveable in a device workspace. The device is coupled to a host computer that displays a cursor in a graphical environment, such as a GUI, on a display screen, where the cursor is controlled by motion of the manipulandum. A force can be output on the mouse based on interactions in the GUI. Indexing features allow control of the cursor when an offset between local and display frames exists, allow the user to reduce the offset, and reduce disconcerting collisions of the mouse with physical workspace limits. Some indexing features include rate control borders for the device workspace, allowing rate control of a cursor when the mouse gets close to a physical limit; and border scaling allowing acursor to always be moved to a screen edge.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: September 11, 2001
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Jonathan L. Beamer, Adam C. Braun, Dean C. Chang
  • Patent number: 6285351
    Abstract: A design interface tool for designing force sensations for use with a host computer and force feedback interface device. A force feedback device is connected to a host computer that displays the interface tool. The user selects a type of force sensation and designs and defines physical characteristics of the selected force sensation using the interface tool. A graphical representation of the characterized force sensation is displayed, which provides a visual demonstration of a feel of the characterized force sensation. The force sensation is output to a user manipulatable object of a force feedback device to be felt by the user, where the graphical representation is updated in conjunction with the output of the force sensation. The user can also associate a sound with the force sensation, such that the sound is output in conjunction with the output of the force sensation. The user can iteratively modify force sensation characteristics and feel the results, as well as synchronize force sensations with sounds.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: September 4, 2001
    Assignee: Immersion Corporation
    Inventors: Dean C. Chang, Louis B. Rosenberg, Jeffrey R. Mallett
  • Patent number: 6252583
    Abstract: Methods and apparatus for efficient management of memory and force output in a force feedback system including a host computer and a force feedback device. A representation of device memory is maintained on the host computer to allow the host computer knowledge and control over storage and force effects in the device memory. A host cache for force effects is provided to allow almost unlimited numbers of force effects to be created for the device, where any force effects not able to fit in device memory are stored in the host cache. Other aspects of the invention include a playlist stored on the device of force effects being played by the device, and management of force output using relatively small, discrete time intervals.
    Type: Grant
    Filed: May 5, 1999
    Date of Patent: June 26, 2001
    Assignee: Immersion Corporation
    Inventors: Adam C. Braun, Jonathan L. Beamer, Dean C. Chang
  • Patent number: 6252579
    Abstract: An interface device and method for providing enhanced cursor control with force feedback. A force feedback interface device includes a manipulandum, such as a mouse, that is moveable in a local workspace. The device is coupled to a host computer that displays a cursor in a graphical environment, such as a GUI, on a display screen. A scaled cursor position in the display frame is reported to the host computer derived from a reference position of the mouse in the local frame, and the host displays the cursor. For example, the cursor position may be scaled by a ballistics algorithm based on mouse velocity to allow fine positioning or coarse motion of the cursor. A force is output on the mouse based on interactions in the GUI, the force being determined based on mouse reference data or cursor ballistic data, depending on the type of force, to reduce distortion between visual and force outputs.
    Type: Grant
    Filed: August 23, 1997
    Date of Patent: June 26, 2001
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Jonathan L. Beamer, Adam C. Braun, Dean C. Chang
  • Patent number: 6169540
    Abstract: A design interface tool for designing force sensations for use with a host computer and force feedback interface device. A force feedback device is connected to a host computer that displays the interface tool. Input from a user is received in the interface to select a type of force sensation to be commanded by a host computer and output by a force feedback interface device. Input, such as parameters, is then received from the user which designs and defines physical characteristics of the selected force sensation. A graphical representation of the characterized force sensation is displayed on the host computer which provides a visual demonstration of a feel of the characterized force sensation so that the user can view an effect of parameters on said force sensation.
    Type: Grant
    Filed: June 17, 1997
    Date of Patent: January 2, 2001
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Dean C. Chang
  • Patent number: 6161126
    Abstract: Force feedback is provided to a user of a client computer receiving information such as a web page over a network such as the World Wide Web from a server machine. The client machine has a force feedback interface device through which the user experiences physical force feedback. The web page may include force feedback information to provide authored force effects. Force feedback is correlated to web page objects by a force feedback program running on the client and based on input information from the interface device, the web page objects, and the force feedback information. Generic force effects can also be provided, which are applied uniformly at the client machine to all web page objects of a particular type as defined by user preferences at the client machine. A web page authoring interface is also described that includes the ability to add force sensations to a web page. The user may assign force effects to web page objects and immediately feel how the web page will feel to an end user.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: December 12, 2000
    Assignee: Immersion Corporation
    Inventors: Evan F. Wies, Dean C. Chang, Louis B. Rosenberg, Sian W. Tan, Jeffrey R. Mallett
  • Patent number: 6147674
    Abstract: A method and apparatus for designing force sensations for use with a force feedback interface device. A graphical design interface tool displayed on a host computer receives input from a user to select a type of force sensation and to define physical characteristics of a particular force sensation of that type, such as a spring or periodic sensation. A graphical representation of the characterized force sensation is displayed, providing the user with a visual demonstration of a feel of the force sensation. The user can preferably feel the designed force sensation through a force feedback device connected to the computer, and may iteratively modify and update force sensations to achieve a desired feel. The graphical display can also be modified by the user with a cursor or other input to modify the force sensation.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: November 14, 2000
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Dean C. Chang
  • Patent number: 6125385
    Abstract: Force feedback is provided to a user of a client computer receiving information such as a web page over a network such as the World Wide Web from a server machine. The client machine has a force feedback interface device through which the user experiences physical force feedback. Force feedback is correlated to web page objects by a force feedback program running on the client and based on input information from the interface device, web page objects, and the force feedback information. Generic force effects can be provided, which are applied uniformly at the client machine to all web page objects of a particular type as defined by user preferences at the client machine.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: September 26, 2000
    Assignee: Immersion Corporation
    Inventors: Evan F. Wies, Dean C. Chang, Louis B. Rosenberg, Sian W. Tan, Jeffrey R. Mallett
  • Patent number: 6078308
    Abstract: A method and apparatus for providing a click surface in a graphical environment, such as a graphical user interface, implemented on a host computer for use with a force feedback interface device. A displayed cursor is controlled by a user-moveable user object, such as a mouse, of the interface device. A click surface is displayed with an associated graphical object, such as a graphical button or an edge of a window, icon, or other object. When the click surface is contacted by the cursor, a force is output opposing movement of the user object in a direction into the click surface and into the graphical object. When the user object has moved to or past a trigger position past the contact with the click surface, a command gesture signal is provided to the host computer indicating that the graphical object has been selected as if a physical input device on the user object, such as a button, has been activated by the user.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: June 20, 2000
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Dean C. Chang
  • Patent number: 6020876
    Abstract: A force feedback interface and method providing a selective disturbance filter for providing selective reduction or elimination of displayed disturbances associated with output force sensations. A force feedback interface device is connected to a host computer that displays a graphical environment. The interface device includes a user manipulatable object, a sensor for detecting movement of the user object, and an actuator to apply output forces to the user object. A microprocessor outputs controlling force signals to the actuator, receives sensor signals from the sensors and reports locative data to the host computer indicative of the movement of the user object. The host computer updates a position of a displayed user-controlled graphical object in the graphical environment based on the reported data.
    Type: Grant
    Filed: April 14, 1997
    Date of Patent: February 1, 2000
    Assignee: Immersion Corporation
    Inventors: Louis B. Rosenberg, Dean C. Chang