Patents by Inventor Howard D. Lewis

Howard D. Lewis 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).

  • Image display apparatus using nanotubes and method of displaying an image using nanotubes
    Patent number: 6667572
    Abstract: An image display apparatus includes a nanotube assembly having a plurality of nanotubes arranged in an array. An optical excitation device is provided adjacent to the nanotube assembly. The optical excitation device includes a diffraction grating and a piezoelectric crystal disposed adjacent to the diffraction grating. A radiation source generates a write beam incident to the piezoelectric crystal, a read beam incident to the diffraction grating, and an erase beam incident to the diffraction grating. When voltage is applied to the piezoelectric crystal, the write beam scans across the diffraction grating and forms a grating pattern in the diffraction grating. The read beam reads the grating pattern as a holographic image on the at least one nanotube. The erase beam erases the grating pattern.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: December 23, 2003
    Assignee: Brother International Corporation
    Inventor: Howard D. Lewis
  • Image display apparatus using nanotubes and method of displaying an image using nanotubes
    Publication number: 20030094898
    Abstract: An image display apparatus includes a nanotube assembly having a plurality of nanotubes arranged in an array. An optical excitation device is provided adjacent to the nanotube assembly. The optical excitation device includes a diffraction grating and a piezoelectric crystal disposed adjacent to the diffraction grating. A radiation source generates a write beam incident to the piezoelectric crystal, a read beam incident to the diffraction grating, and an erase beam incident to the diffraction grating. When voltage is applied to the piezoelectric crystal, the write beam scans across the diffraction grating and forms a grating pattern in the diffraction grating. The read beam reads the grating pattern as a holographic image on the at least one nanotube. The erase beam erases the grating pattern.
    Type: Application
    Filed: November 20, 2001
    Publication date: May 22, 2003
    Applicant: BROTHER INTERNATIONAL CORPORATION
    Inventor: Howard D. Lewis