Patents by Inventor Robert P. Collins

Robert P. Collins 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).

  • Transflective liquid crystal display with enhanced contrast ratio
    Patent number: 4541692
    Abstract: A back lighted transflective liquid crystal display with improved contrast ratio has a light mask positioned between the transflective element and the source of back lighting. The mask has light transmitting sections which are aligned with and have the same configuration as the indicia-forming electrodes in the cell. The mask has opaque or light blocking sections that are aligned with the background portion of the cell. In the transmissive mode light impinges on the cell only in the area of the indicia-forming electrodes, thereby enhancing the contrast ratio between the indicia and background portions of the cell.
    Type: Grant
    Filed: May 31, 1983
    Date of Patent: September 17, 1985
    Assignee: General Electric Company
    Inventors: Robert P. Collins, Elias S. Haim, John A. Rowen