Patents by Inventor Maurice Le Galguen

Maurice Le Galguen 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).

  • Method for the control of an electro-optical matrix screen and control circuit
    Patent number: 5055833
    Abstract: A control method and control circuit for an electro-optic matrix screen wherein: a) during a frame time period, and during the control of certain lines, the screen is controlled by voltages of a determined polarity; b) during the same frame time period, and during the control of the other lines, the screen is controlled by voltages of reverse polarity; and c) during the following frame time period, the control voltages is reversed. An inverter control circuit C.INV enables the inversion of the voltages given by input circuits INV, IN, ADD.C to the column electrodes, and by an addressing circuit ADD.C to the line electrodes. The invention can be applied to the control of liquid crystal display panels to eliminate display faults.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: October 8, 1991
    Assignee: Thomson Grand Public
    Inventors: Robert Hehlen, deceased, by Philippe Hehlen, legal representative, by Bernard Hehlen, legal representative, Maurice Le Galguen, Bruno Mourey