US 2006/0232539 A1 · Liquid crystal display and drive circuit thereof

Abstract

A liquid crystal display of this invention includes a plurality of scan lines, a plurality of data lines, and pixels provided at each intersection of the plurality of scan lines and the plurality of data lines. The liquid crystal display further includes a plurality of pixel groups constituted of the pixels provided at each intersection of the consecutive plurality of data lines and one of the plurality of scan lines, in which signals of the same polarity are outputted to all data lines included in each of the plurality of pixel groups by a time-sharing drive that sequentially outputs signals, and reversed polarity signals are outputted to the plurality of pixel groups adjacent to each other, so that signals with polarities inverted after each frame are outputted to the data lines included in the pixel groups.

Claims30

Dependent claims

A liquid crystal display comprising:

a plurality of scan lines;
a plurality of data lines;
a plurality of pixels provided at each intersection of the plurality of scan lines and the plurality of data lines;
a plurality of pixel groups comprised of the plurality of pixels;
and
a drive circuit driving the plurality of scan lines and the plurality of data lines;
wherein one of the plurality of pixel groups is comprised of some of the plurality of pixels provided at each intersection of some of the plurality of data lines and a scan line, and the drive circuit output signals of one polarity to all data lines contained in each of the plurality of pixel groups by a time-sharing drive, alternated polarity signals to the plurality of pixel groups adjacent to each other, and polarities of signals which are inputted to the data lines included in the plurality of pixel groups are inverted every each frame.

4 more elements

A drive circuit of a liquid crystal display comprising:

a data latch circuit that latches a digital video signal;
a level shift circuit that level shifts a digital video signal latched by the data latch circuit;
a D/A converter that converts a digital video signal that is level shifted by the level shift circuit into an analog video signal, and
an output control portion that outputs a positive analog video signal and a negative video signal with a different polarity from a reference voltage to data lines of a liquid crystal display based on an output of the D/A converter,
wherein the output control portion consecutively outputs the positive analog video signal in time-sharing manner to a first plurality of data lines during a prescribed period of a horizontal period, and consecutively outputting the negative polarity analog video signal in a time-sharing manner to a second plurality of data lines during the prescribed period.

2 more elements

A drive circuit of a liquid crystal display comprising:

a positive polarity drive circuit formed on a first continuous region on a substrate for outputting a positive polarity analog video signal to an output terminal of a display unit;
a positive polarity precharge circuit that is provided between the positive polarity drive circuit and the output terminal, for precharging a data line of the display unit near a reference voltage before a polarity of the data line changes into a negative polarity with different polarity from the positive polarity relative to the reference voltage;
a negative polarity drive circuit formed on a second continuous region different from the first continuous region on the substrate, for outputting the negative polarity analog video signal to the output terminal;
and
a negative polarity precharge circuit provided between the negative polarity drive circuit and the output terminal, for precharging the data line near the reference voltage before a polarity of the data line changes from the negative polarity to the positive polarity.

2 more elements

Dependencies are inferred from the claim text.

Liquid crystal display and drive circuit thereof

Life of this patent

Liquid crystal display and drive circuit thereof

Life of this patent

Abstract

Claims30