Polarity inversion driving method and apparatus for liquid crystal display panel, and liquid crystal display

Patent metadata

Field	Value
Publication number	US-9972257-B2
Application number	US-201314106238-A
Country	US
Kind code	B2
Filing date	Dec 13, 2013
Priority date	Dec 14, 2012
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

A polarity inversion driving method and apparatus for a liquid crystal display panel, and a liquid crystal display, is provided in order to solve the technical problem in the prior art that the interference strips are concentrated in one line, without increasing the power consumption of the liquid crystal display panel. The method comprises the steps of: generating N polarity control signals of different timings, wherein N is an integer and N≥2, and each polarity control signal is used to control a polarity voltage for sub-pixels in one or more columns of a liquid crystal display panel; and outputting the N polarity control signals to polarity control lines in the liquid crystal display panel, wherein each polarity control line corresponds to one polarity control signal.

First claim

What is claimed is:

1. A polarity inversion driving apparatus for a liquid crystal display panel, comprising:
a polarity control signal generating unit for generating N polarity control signals of different timings, wherein N is an integer and N≥2, and each polarity control signal is used to control a polarity voltage for sub-pixels in one or more columns of the liquid crystal display panel;
a polarity control signal outputting unit for outputting the N polarity control signals to polarity control lines in the liquid crystal display panel, wherein each polarity control line corresponds to one polarity control signal;
first to fourth input ports for inputting first to fourth grayscale signals respectively;
first to fourth output ports for outputting respectively polarity voltages for the sub-pixels in corresponding columns;
a first voltage selection channel having a first positive-polarity-voltage selection channel and a first negative-polarity-voltage selection channel;
a second voltage selection channel having a second positive-polarity-voltage selection channel and a second negative-polarity-voltage selection channel;
first to fourth channel selection module, wherein the first and second grayscale signals, based on the voltage polarities thereof selected by the first channel selection module, are respectively input into selected polarity-voltage selection channels of the first voltage selection channel, and then are output to first and second output ports respectively via the third channel selection module, and wherein the third and fourth grayscale signals, based on the voltage polarities thereof selected by the second channel selection module, are respectively input into selected polarity-voltage selection channels of the second voltage selection channel, and then are output to the third and fourth output ports respectively via the fourth channel selection module;
a first polarity control signal input port, for receiving a first polarity control signal from the polarity control signal generating unit, to control the first and third channel selection modules; and
a second polarity control signal input port, for receiving a second polarity control signal whose timing is different from that of the first polarity control signal from the polarity control signal generating unit, to control the second and fourth channel selection modules,
wherein first to fourth sub-pixel columns respectively receiving the polarity voltages corresponding to the first to fourth grayscale signals are arranged to be sequentially adjacent to each other.

2. A liquid crystal display, comprising the polarity inversion driving apparatus for a liquid crystal display panel according to claim 1 .

3. The liquid crystal display according to claim 2 , wherein
the N polarity control signals of different timings comprise a first polarity control signal and a second polarity control signal; and
polarity inversion positions of the sub-pixels, whose polarity voltage is controlled by the first polarity control signal, of one or more columns of the liquid crystal display panel are different from those of the sub-pixels, whose polarity voltage is controlled by the second polarity control signal and which are adjacent to the sub-pixels controlled by the first polarity control signal, of other one or more columns of the liquid crystal display panel.

4. A polarity inversion driving apparatus for a liquid crystal display panel, comprising:
a polarity control signal generating unit for generating N polarity control signals of different timings, wherein N is an integer and N≥2, and each polarity control signal is used to control a polarity voltage for sub-pixels in one or more columns of the liquid crystal display panel;
a polarity control signal outputting unit for outputting the N polarity control signals to polarity control lines in the liquid crystal display panel, wherein each polarity control line corresponds to one polarity control signal;
first to fourth input ports for inputting first to fourth grayscale signals respectively;
first to fourth output ports for outputting respectively polarity voltages for the sub-pixels in corresponding columns;
a first voltage selection channel having a first positive-polarity-voltage selection channel and a first negative-polarity-voltage selection channel;
a second voltage selection channel having a second positive-polarity-voltage selection channel and a second negative-polarity-voltage selection channel;
first to fourth channel selection modules, wherein the first and third grayscale signals, based on the voltage polarities thereof selected by the first channel selection module, are respectively input into selected polarity-voltage selection channels of the first voltage selection channel, and then are output to first and second output ports respectively via the third channel selection module, and wherein the second and fourth grayscale signals, based on the voltage polarities thereof selected by the second channel selection module, are respectively input into selected polarity-voltage selection channels of the second voltage selection channel, and then are output to the second and fourth output ports respectively via the fourth channel selection module;
a first polarity control signal input port, for receiving a first polarity control signal from the polarity control signal generating unit, to control the first and third channel selection modules;
a second polarity control signal input port, for receiving a second polarity control signal whose timing is different from that of the first polarity control signal from the polarity control signal generating unit, to control the second and fourth channel selection modules,
wherein first to fourth sub-pixel columns respectively receiving the polarity voltages corresponding to the first to fourth grayscale signals are arranged to be sequentially adjacent to each other.

5. A liquid crystal display, comprising the polarity inversion driving apparatus for a liquid crystal display panel according to claim 4 .

6. The liquid crystal display according to claim 5 , wherein
the N polarity control signals of different timings comprise a first polarity control signal and a second polarity control signal; and
polarity inversion positions of the sub-pixels, whose polarity voltage is controlled by the first polarity control signal, of one or more columns of the liquid crystal display panel are different from those of the sub-pixels, whose polarity voltage is controlled by the second polarity control signal and which are adjacent to the sub-pixels controlled by the first polarity control signal, of other one or more columns of the liquid crystal display panel.

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech
• Boe Techology Group Co Ltd

Inventors

• Yang Yuting
• Liang Hengzhen
• Zhang Wenhao
• Zhang Yang
• Ye Chun

Classifications

• G09G3/3614 Primary

  Control of polarity reversal in general · CPC title

• G09G3/3688

  suitable for active matrices only · CPC title