Patent ID: 6064360
Filing Date: 2000-05-16
Classification: G09G

Abstract:
A liquid crystal display having many active switching elements arranged in a matrix, each of said active switching elements having a transistor, so as to remove an afterimage occurring when the supply of a first source voltage is stopped, said liquid crystal display comprising:gate lines connected to gates of said transistors in said active switching elements;a first node supplied with a second source voltage generated from said source voltage;charge storage means of restoring a predetermined charge;a P-channel transistor connected between said first node and said charge storage means;a second node connected to the gate of said P-channel transistor;voltage supply means for supplying said second node with a voltage causing said P-channel transistor to be maintained in a high-resistance state while said first source voltage is supplied to said liquid crystal display;voltage reducing means for using capacitive coupling to reduce the voltage of said second node to a voltage causing said P-channel transistor to become a low-resistance state in response to the change in said source voltage if the supply of the first source voltage of said liquid crystal display is stopped; andcontrol means for supplying the charge stored in said charge storage means to said gate lines through said first node in response to said P-channel transistor having become a low-resistance state, thereby to cause said transistors in said active switching elements to become a low-resistance state.