Patents by Inventor Alexander King-Chung Kan

Alexander King-Chung Kan 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).

  • Asymmetric two-pass graphics scaling
    Patent number: 8085280
    Abstract: A method and an apparatus for determining an up scale factor and a down scale factor according to a scale factor received from a graphics application program interface (API) to scale a graphics data in a graphics processing unit (GPU) are described. The up scale factor and the down scale factor may be precisely stored in the GPU based on a fixed number of bits. An actual scale factor which can be precisely stored in the GPU corresponding to the scale factor may differ from the scale factor with a difference. Graphics commands may be sent to the GPU to scale the graphics data according to the up scale factor and the down scale factor separately. A combined scale factor corresponding to a combination of the up scale factor and the down scale factor may differ from the scale factor less then the difference between the actual scale factor and the scale factor.
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: December 27, 2011
    Assignee: Apple Inc.
    Inventors: Loren Brichter, Alexander King-Chung Kan, Michael James Elliott Swift
  • Asymmetric Two-Pass Graphics Scaling
    Publication number: 20110134147
    Abstract: A method and an apparatus for determining an up scale factor and a down scale factor according to a scale factor received from a graphics application program interface (API) to scale a graphics data in a graphics processing unit (GPU) are described. The up scale factor and the down scale factor may be precisely stored in the GPU based on a fixed number of bits. An actual scale factor which can be precisely stored in the GPU corresponding to the scale factor may differ from the scale factor with a difference. Graphics commands may be sent to the GPU to scale the graphics data according to the up scale factor and the down scale factor separately. A combined scale factor corresponding to a combination of the up scale factor and the down scale factor may differ from the scale factor less then the difference between the actual scale factor and the scale factor.
    Type: Application
    Filed: February 14, 2011
    Publication date: June 9, 2011
    Inventors: Loren Brichter, Alexander King-Chung Kan, Michael James Elliott Swift
  • Asymmetric two-pass graphics scaling
    Patent number: 7898554
    Abstract: A method and an apparatus for determining an up scale factor and a down scale factor according to a scale factor received from a graphics application program interface (API) to scale a graphics data in a graphics processing unit (GPU) are described. The up scale factor and the down scale factor may be precisely stored in the GPU based on a fixed number of bits. An actual scale factor which can be precisely stored in the GPU corresponding to the scale factor may differ from the scale factor with a difference. Graphics commands may be sent to the GPU to scale the graphics data according to the up scale factor and the down scale factor separately.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: March 1, 2011
    Assignee: Apple Inc.
    Inventors: Loren Brichter, Alexander King-Chung Kan, Michael James Elliott Swift
  • Assymetric two-pass graphics scaling
    Publication number: 20080303846
    Abstract: A method and an apparatus for determining an up scale factor and a down scale factor according to a scale factor received from a graphics application program interface (API) to scale a graphics data in a graphics processing unit (GPU) are described. The up scale factor and the down scale factor may be precisely stored in the GPU based on a fixed number of bits. An actual scale factor which can be precisely stored in the GPU corresponding to the scale factor may differ from the scale factor with a difference. Graphics commands may be sent to the GPU to scale the graphics data according to the up scale factor and the down scale factor separately.
    Type: Application
    Filed: June 7, 2007
    Publication date: December 11, 2008
    Inventors: Loren Brichter, Alexander King-Chung Kan, Michael James Elliott Swift