Patents by Inventor Eugene Leiba

Eugene Leiba 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).

  • Liquid crystal mixture and its application to optical modulation
    Patent number: 4222636
    Abstract: The present invention relates to a liquid crystal mixture exhibiting a very short turn-on time of electrically controlled optical phenomena, such as the variation in double-refraction. Said mixture comprises two liquid crystal elements having dielectric anisotropy values chosen to be almost the same but of opposite sign; the value of the resultant dielectric anisotropy is very small.
    Type: Grant
    Filed: March 17, 1978
    Date of Patent: September 16, 1980
    Assignee: Thomson-CSF
    Inventors: Georges Assouline, Michel Hareng, Eugene Leiba
  • Display devices
    Patent number: 4088400
    Abstract: An improvement in electro-optical display devices utilizing polarized light is disclosed, in which the linearly polarized light emerging from the display device is picked up by a diffuser and reaches the observer eyes after passing through a linear polarizer. The contrast is thus enhanced and the display can be used in presence of strong ambient lighting. The contrast can be still further improved by arranging at either side of the diffuser two suitably oriented quarter-wave plates.
    Type: Grant
    Filed: December 21, 1973
    Date of Patent: May 9, 1978
    Assignee: Thomson-CSF
    Inventors: Georges Assouline, Michel Hareng, Michel Roncillat, Eugene Leiba
  • Data display device
    Patent number: 3938140
    Abstract: The invention relates to data display devices having a segmented structure. It provides a display device whose adjacent coplanar segments are divided up into complementary areas respectively connected to excitation units controlled simultaneously in such manner as to produce, in the absence of break down, a homogeneous display of the segments. The invention applies to display by elementary sources of light or by liquid crystals and other materials having electro-optical properties.
    Type: Grant
    Filed: May 6, 1974
    Date of Patent: February 10, 1976
    Assignee: Thomson-CSF
    Inventors: Jean Garcia, Michel Hareng, Eugene Leiba