US 2009/0289878 A1 · LIQUID CRYSTAL DISPLAY DEVICE AND DRIVING METHOD THEREOF

Abstract

An LCD device and driving method thereof are disclosed. The LCD device includes a source driver, a controller, a voltage generator, a plurality of data lines, a plurality of pixels, and a plurality of demultiplexer modules. The controller provides two sets of control signals. The voltage generator provides an AC common voltage. Each demultiplexer module includes two demultiplexers. The first demultiplexer distributes data signals received from the source driver into a set of data lines based on the first set of control signals. The second demultiplexer distributes data signals received from the source driver into another set of data lines based on the second set of control signals. The driving method is utilized for writing a plurality of low-voltage data signals having different polarities into a plurality of pixels based on different common voltages during different intervals of a frame period.

Claims25

Dependent claims

A liquid crystal display device comprising:

a source driver for generating a plurality of data signals, the source driver comprising a plurality of output ports for outputting the data signals;
a gate driver for generating a plurality of gate signals;
a plurality of data lines, the data lines comprising a plurality of first data lines and a plurality of second data lines;
a plurality of gate lines, each of the gate lines being coupled to the gate driver for receiving a corresponding gate signal;
a control circuit for generating a plurality of first control signals and a plurality of second control signals;
and
a plurality of demultiplexer modules, each of the demultiplexer modules comprising:
a first demultiplexer coupled to the control circuit, the source driver and the first data lines for distributing a first data signal of the data signals to the first data lines based on the first control signals;
and
a second demultiplexer coupled to the control circuit, the source driver and the second data lines for distributing a second data signal of the data signals to the second data lines based on the second control signals.

7 more elements

A driving method for use in an LCD device, comprising:

setting a first gate signal to be an enabled signal during a first interval;
setting a common voltage to be a first voltage and writing a first set of data signals with a first polarity sequentially into a first set of storage units of the LCD device based on the enabled first gate signal during a first set of sub-intervals of the first interval;
and
setting the common voltage to be a second voltage and writing a second set of data signals with a second polarity sequentially into a second set of storage units of the LCD device based on the enabled first gate signal during a second set of sub-intervals of the first interval;
wherein the first voltage is different from the second voltage, the first set of sub-intervals and the second set of sub-intervals are not overlapped, and the first polarity is opposite to the second polarity.

2 more elements

Dependencies are inferred from the claim text.

Liquid crystal display device and driving method thereof

Life of this patent

Liquid crystal display device and driving method thereof

Life of this patent

Abstract

Claims25