Patents by Inventor Cecil W. Penn

Cecil W. Penn 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: 8038316
    Abstract: Color displays superpose a two color image component with a monochrome image component to yield full color images. Each image component may be generated by controlling an array of light sources. In some embodiments the monochrome image component is provided by a backlight and the two color component is provided by an array of sub-pixels of two types.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: October 18, 2011
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Louis D. Silverstein, Cecil W. Penn
  • Publication number: 20090141488
    Abstract: Color displays superpose a two color image component with a monochrome image component to yield full color images. Each image component may be generated by controlling an array of light sources. In some embodiments the monochrome image component is provided by a backlight and the two color component is provided by an array of sub-pixels of two types.
    Type: Application
    Filed: April 3, 2006
    Publication date: June 4, 2009
    Applicant: DOLBY CANADA CORPORATION
    Inventors: Louis D. Silverstein, Cecil W. Penn
  • Patent number: 6184874
    Abstract: A method for driving a field emission display (10) includes the steps of dividing a digital video word (14), which has n-bits, into N digital sub-words (16, 17), each of which has n′-bits, and sequentially converting each of the digital sub-words (16, 17) into a control signal (27, 29). The control signals (27, 29) are sequentially utilized to control drive signals (28, 38, 39, 41) applied to the field emission display (10).
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: February 6, 2001
    Assignee: Motorola, Inc.
    Inventors: Robert T. Smith, Cecil W. Penn
  • Patent number: 5446567
    Abstract: The liquid crystal display includes a patterned mirror disposed between the backlight assembly and the black matrix to reflect light back into the backlight assembly that otherwise would impinge on the black matrix. Apertures through the patterned mirror are so shaped that parallax effects with respect to the black matrix provides desirable luminance versus viewing angle profiles.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: August 29, 1995
    Assignee: Honeywell Inc.
    Inventors: Elias S. Haim, Cecil W. Penn
  • Patent number: 5150235
    Abstract: In a polychromatic liquid crystal display, apparatus and method for improving the off-axis viewing characteristics are described. The angle of view can be expanded by appropriate selection of the thickness and the birefringence parameter of the liquid crystal material as a function of the color of the liquid crystal display pixel. In order to improve further the angle of view, retardation films are used to reduce the angular dependence of the radiation. The retardation films reduce the background light leakage by compensating for the change in retardation of the liquid crystal display at angles other than normal to the display. The reduction in the background light leakage results in improved contrast ratio and chromaticity.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: September 22, 1992
    Assignees: Honeywell Inc., Hosiden Corporation
    Inventors: Elias S. Haim, John A. Rupp, Cecil W. Penn
  • Patent number: 4642529
    Abstract: Apparatus for providing precise convergence measurements of electron beams in a CRT display by sensing the displacement of brightness peaks as an array of phosphorescent regions are sequentially illuminated by energy from the electron beams deflected by the deflection apparatus of the display system and an independent external time varying magnetic field applied by enclosing the CRT housing within a pair of external coils. Convergence is calculated by calibrating the recorded brightness peaks as a function of beam displacement. The system is adaptable to measuring both vertical and horizontal components of convergence as well as linewidth. The apparatus operates independently of and does not require interruption of dynamic functions which operate in synchronism with the deflection circuits, such as dynamic convergence correction.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: February 10, 1987
    Assignee: Sperry Corporation
    Inventor: Cecil W. Penn