Patents by Inventor Jerry Yeeming Chung

Jerry Yeeming Chung 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: 5835123
    Abstract: Compensation for pixel aberrations in a laser printer is accomplished by selecting pixels to be augmented, and providing additional optical energy to the selected pixels. In one embodiment, the pixels are selected by selecting pixels in combinations in which required pixel augmentation is indicated. The additional optical energy may be applied at the sub-pixel level so that a threshold of energy depletion on an optical photoreceptor (OPR) is not reached where image development would occur. The energy applied at the sub-pixel level results in enhancement of the selected pixels at an adjacent pixel location.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: November 10, 1998
    Assignee: Hewlett-Packard Company
    Inventors: Jerry Yeeming Chung, Warangkana Tepmongkol
  • Patent number: 5818504
    Abstract: Compensation for pixel aberrations in a laser printer is accomplished by altering pixels in accordance with pixel location. A projection of a scan line is skewed with respect to a line normal to the surface of an optical photoreceptor (OPR), which results in a change in the shape of projected pixels. Selected pixels are augmented in order to adjust their shape. The additional optical energy may be applied at the sub-pixel level so that a threshold of energy depletion on an optical photoreceptor (OPR) is not reached where image development would occur. Alternatively, the additional energy may be applied in a manner which provides additional development to simulate a pixel having a desired width across a scan line. The invention allows a scan line to be produced in which pixels across the scan line are made more uniform.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: October 6, 1998
    Assignee: Hewlett-Packard Company
    Inventors: Jerry Yeeming Chung, Richard F. Beaufort