Patents by Inventor Jeffrey G. Cheng

Jeffrey G. Cheng 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: 20110242142
    Abstract: An apparatus includes a chrominance and luminance module. The chrominance and luminance module obtains display characteristics of each of a plurality of displays. The chrominance and luminance module selectively adjusts, on a per display basis, chrominance and luminance for each of the displays based on the display characteristics. In one example, the displays collectively display a single large surface.
    Type: Application
    Filed: March 21, 2011
    Publication date: October 6, 2011
    Applicant: ATI TECHNOLOGIES ULC
    Inventors: Syed Athar Hussain, Jeffrey G. Cheng
  • Publication number: 20110043514
    Abstract: A circuit includes a plurality of display path circuits and a timing and frame synchronization circuit. The timing and frame synchronization circuit aligns a first blanking interval of first timing information provided by a first of the display path circuits for a first display based on a second blanking interval of second timing information provided by a second of the display path circuits for a second display.
    Type: Application
    Filed: August 24, 2009
    Publication date: February 24, 2011
    Applicant: ATI Technologies ULC.
    Inventors: Syed A. Hussain, Jeffrey G. Cheng
  • Patent number: 7689748
    Abstract: Embodiments of a system and method for handling interrupts are described herein. In an embodiment interrupts from various client components in a system (also referred to as clients) are processed by an interrupt handler component uniformly. The various clients signal interrupts in different manners. For example, some clients signal interrupts in a level-based manner, and some clients signal interrupts in a pulse-based manner. In an embodiment, all interrupts received by the interrupt handler are formed into an event message according to a uniform format regardless of the manner in which the interrupt is signaled. The event message includes all information necessary for a host processor interrupt service routine (ISR) to service the interrupts without reading hardware registers. Event messages are stored in an event buffer for access and handling by the host. The event buffer is managed by the interrupt handler.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: March 30, 2010
    Assignee: ATI Technologies, Inc.
    Inventors: Mark Grossman, Jeffrey G. Cheng, Gordon Caruk, Joel Wilke, Elaine Poon