Patents Examined by Tarifur R. Chandhury
  • Patent number: 6340998
    Abstract: A thin film transistor liquid crystal display according to the present invention provides against cut-off of lines for supplying a predetermined ‘ON’- or ‘OFF’-signal to thin film transistors and improves ‘ON’-current characteristic of the thin film transistors arranged in parallel. The thin film transistor liquid crystal display comprises primary lines and secondary lines to supply scanning signals and data signals respectively wherein each of said primary and secondary lines are branched and a thin film transistor is electrically coupled to each of the branched lines such that at least two transistors are turned on and off simultaneously when one of primary lines and one of secondary lines are applied with scanning signals and data signals respectively. Particularly, the primary and secondary lines are patterned in a trapezoid shape to define a lattice having two vertical sides and two horizontal sides for a unit pixel electrode.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: January 22, 2002
    Assignee: Samsung Display Devices Co., Ltd
    Inventors: Byung-Hee Kim, Sun Hwa Kim, Seung Gon Kang, Hyun Eok Shin, Young Il Choi
  • Patent number: 6188454
    Abstract: The present invention features procedures for correcting discoloration and brightness variations due to liquid crystal cell gap variations or other optical, electro-optical, ambient light, electronic, mechanical, and materials anomalies arising in tiled, flat-panel displays. The purpose of these corrections is to achieve a visually seamless appearance. Absolute, relative and/or smoothing corrections are implemented by performing pixel data video processing with correction data acquired from memory. Techniques for determining and applying these corrections are described.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: February 13, 2001
    Assignee: Rainbow Displays, Inc.
    Inventors: Raymond G. Greene, J. Peter Krusius, Dean W. Skinner, Boris Yost