Patent ID: 7019727
Filing Date: 2006-03-28
Classification: G02F,G09G

Abstract:
1. An active matrix display comprising: a plurality of gate signal lines disposed in a predetermined direction on a substrate; a plurality of drain signal lines disposed in a direction different from the predetermined direction; a plurality of display electrodes disposed adjacent to intersections of the gate signal lines and the drain signal lines for forming an matrix; a retaining circuit which holds a digital image signal from a corresponding drain signal line in response to a signal from a corresponding gate signal line and receives a high voltage and a low voltage, said retaining circuit being provided for at least one of the display electrodes; a signal selection circuit which selects a first voltage or a second voltage in response to a signal from the retaining circuit and provides a corresponding display electrode with the first voltage or the second voltage, said signal selection circuit being provided for the retaining circuit; and a reference voltage generation circuit which outputs to the signal selection circuit the first voltage, the second voltage or the first and second voltages, and is disposed on the substrate, wherein the reference voltage generation circuit is configured to be driven by a difference between the high and low voltages, and the signal selection circuit comprises a first complementary transistor for selecting the first voltage and a second complementary transistor for selecting the second voltage.