Patents by Inventor John Cheng Ming {acute over (T)}ou

John Cheng Ming {acute over (T)}ou 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: 7965406
    Abstract: A circuit which uses a compressor to divide each separation image into 8-line strips, and to independently compress each strip, a single decompressor to decompress two or more color image separations, strip by strip, by interleaving them, and to apply them to two or more print heads, one for each color separation. DMA from a main memory is used to apply both separations to the decompressor, and the decompressor output is demultiplexed into two print heads, one for each separation. This is done to drive each color separation simultaneously in a single-pass color printer. Multiplexing logic controls the DMA into the decompressor and the output of the decompressor into separate buffers for each color separation. Additional logic uses the page and line sync from each print head to synchronize the accessing of the correct image raster from buffers at the output of the decompressor to the associated print head.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: June 21, 2011
    Assignee: Xerox Corporation
    Inventors: George L. Eldridge, Munir G. Salfity, John Cheng Ming {acute over (T)}ou