US 2004/0164944 A1 · Active matrix type display device

Abstract

The invention provides an active matrix type display device which realizes an image display of multiple gray scale exhibiting high numerical aperture and high definition with a least number of wiring by having an image memory circuit equivalent to a static memory circuit without using two voltages, that is, high and low voltages. Pixels are arranged at portions where a plurality of scanning lines (selection signal lines) and a plurality of signal lines (data lines (video signal lines)) intersect each other, each pixel is comprised of a pixel electrode, a switching element which selects the pixel electrode and a memory circuit which stores data to be written in the pixel electrode, and a power supply line which applies an AC voltage to the memory circuit is provided.

Claims20

Dependent claims

An active matrix type display device comprising:

a substrate;
a scanning line formed on the substrate;
a video signal line formed on the substrate;
a transistor connected to the scanning signal line and the video signal line;
a first inverter circuit connected to the transistor and formed on the substrate;
a second inverter circuit connected to the first inverter circuit and formed on the substrate;
a third inverter circuit connected to the second inverter and formed on the substrate;
a pixel electrode connected to the third inverter circuit;
and
a pair of AC power supply lines formed on the substrate,
wherein the first inverter circuit and the second inverter circuit are supplied with a pair of AC voltages from the AC power supply lines.

8 more elements

Dependencies are inferred from the claim text.

Active matrix type display device

Life of this patent

Active matrix type display device

Life of this patent

Abstract

Claims20