Patents by Inventor Masako Shinya

Masako Shinya 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: 5170158
    Abstract: A display device has a driver circuit for driving data lines in a matrix display panel according to input digital signals. The driver circuit includes a number of digital-to-analog (D/A) converters, which number is less than the number of pixels contained in one horizontal scanning line. The D/A converters are repeatedly used to sequentially convert portions of the input digital image signal corresponding to one horizontal scanning line. The analog signals obtained by each D/A conversion are retained by a sample-and-hold circuit. When storage for one horizontal scanning line is completed, the signals are simultaneously delivered to the data lines. Therefore the display device can be reduced to a small circuit size. Also the offset voltage of the sample-and-hold circuitry can be reduced, since the outputs from the D/A converters can be sampled at an interval longer than the interval between pixels in the input digital signals.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: December 8, 1992
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Masako Shinya