×

Liquid crystal display device

  • US 20040041773A1
  • Filed: 08/01/2003
  • Published: 03/04/2004
  • Est. Priority Date: 08/02/2002
  • Status: Active Grant
First Claim
Patent Images

1. An active matrix liquid crystal display device configured to invert a polarity of a voltage on a common electrode by row or by frame, comprising:

  • a common voltage supply circuit provided to supply a common voltage VCOM10 to said common electrode; and

    a charge collection and resupply circuit connected between said common electrode and said common voltage supply circuit, said charge collection and resupply circuit including;

    a first switch connected between said common electrode and said common voltage supply circuit;

    a charge collection capacitor;

    a second switch connected between a connection point of said common electrode and said first switch and said charge collection capacitor;

    a switch control unit provided to control turning on and off of said first and second switches, said switch control unit being configured to operate such that immediately before a polarity of said common voltage VCOM10 is inverted, said first switch is turned off and then said second switch is turned on, and further, after inversion of said polarity of said common voltage VCOM10, said second switch is turned off and then said first switch is turned on.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×