Patents by Inventor Alan Lelah

Alan Lelah 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).

  • Optical switch based on light spatial modulators
    Patent number: 6714339
    Abstract: The invention concerns an optical switch for optical beams comprising a series of optical input channels (110) and a series of optical output channels (210), two optical index spatial modulating cells (300, 400) adapted to respectively deflect an optical beam coming out of an input channel and arriving onto an output channel, each series of optical channels (110, 210) being distributed according to two dimensions transverse to the direction of the channels and the index spatial modulating cells (300, 400) being each designed to produce deflections according to said two dimensions.
    Type: Grant
    Filed: April 22, 2003
    Date of Patent: March 30, 2004
    Assignee: France Telecom
    Inventors: Stéphane Gosselin, Philippe Gravey, Nicole Wolffer, Alan Lelah
  • Optical switch based on light spatial modulators
    Publication number: 20030161028
    Abstract: The invention concerns an optical switch for optical beams comprising a series of optical input channels (110) and a series of optical output channels (210), two optical index spatial modulating cells (300, 400) adapted to respectively deflect an optical beam coming out of an input channel and arriving onto an output channel, each series of optical channels (110, 210) being distributed according to two dimensions transverse to the direction of the channels and the index spatial modulating cells (300, 400) being each designed to produce deflections according to said two dimensions.
    Type: Application
    Filed: April 22, 2003
    Publication date: August 28, 2003
    Inventors: Stephane Gosselin, Philippe Gravey, Nicole Wolffer, Alan Lelah
  • Protective circuit for a control circuit, in particular of liquid crystal display screen
    Patent number: 5289332
    Abstract: Control protective circuit, in particular of liquid crystal display screen. The protective circuit includes three transistors making possible the transfer of the voltage to output pin, the resetting of middle point and the resetting of the output. Application to the control of liquid crystal display screens.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: February 22, 1994
    Assignee: France Telecom Etablissement Autonome de Droit Public (Centre National d'Etudes des Telecommunications)
    Inventors: Patrice Senn, Alan Lelah, Gilbert Martel
  • Circuit for controlling the lines of a display screen and including test means with a single output
    Patent number: 5262720
    Abstract: A circuit for controlling the lines of a display screen and including a t means with a single output is disclosed. The test means includes a single test control line (LCT), a single test output line (LST) and a plurality of sample holders (CEBj) and associated gates (Pj) and switches (Ij). The output voltage of the sample holders is transmitted onto a test output block (ST).
    Type: Grant
    Filed: October 8, 1991
    Date of Patent: November 16, 1993
    Assignees: France Telecom Etablissement Autonome de Droit Public (Centre National D'Etudes des Telecommunications), Societe d'Applications Generales d'Electricite et de Mecanique Sagem
    Inventors: Patrice Senn, Alan Lelah, Gilbert Martel, Denis Pradel
  • Sample and hold circuit for a liquid crystal display screen
    Patent number: 5252956
    Abstract: Sample and hold circuit for a liquid crystal display screen. The circuit comprises two stages, the first with switched capacitance the second with an amplifier device. Application to the control of liquid crystal display screens.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: October 12, 1993
    Assignee: France Telecom Etablissement Autonome de Droit Public (Center National D'Etudes des Telecommunications)
    Inventors: Patrice Senn, Alan Lelah, Gilbert Martel