Liquid crystal panels and the driving methods thereof

Patent metadata

Field	Value
Publication number	US-9786236-B2
Application number	US-201514888428-A
Country	US
Kind code	B2
Filing date	Oct 21, 2015
Priority date	Sep 30, 2015
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A liquid crystal panel and the driving method thereof are disclosed. The liquid crystal panel includes at least one storage electrode, a plurality of scanning lines, a plurality of data lines, and a plurality of pixel areas. Each of the pixel areas includes a pixel electrode, a first TFT and a second TFT. The first TFT drives the corresponding pixel electrode. The gate of the second TFT connects with the previous scanning line, and one of the source and the drain of the second TFT connects to the corresponding pixel electrode within the pixel area, and the other one connects with the storage electrode. In this way, the optimal common voltage is applied to the liquid crystal panel when the liquid crystal panel is in a displaying process, and thus the display performance is guaranteed.

First claim

What is claimed is:

1. A liquid crystal panel, comprising:
at least one storage electrode, a plurality of scanning lines, a plurality of data lines, and a plurality of pixel areas arranged in a matrix defined by the scanning lines and the data lines, wherein each of the pixel areas comprises a pixel electrode, a first thin film transistor (TFT) and a second TFT, a source of the first TFT connects to the corresponding data line, a drain of the first TFT connects to the corresponding pixel electrode, a gate of the first TFT connects to the corresponding scanning line, the sources of the first TFTs within the same column connect to the same data line, the gates of the first TFT within the same row connect to the same scanning line, the first TFT is configured for driving the pixel electrode within the corresponding pixel area, the gate of the second TFT connects with the previous scanning line, one of the source and the drain of the second TFT connects to the corresponding pixel electrode within the pixel area, and the other one connects with the storage electrode; and
wherein the storage electrodes comprises first storage electrodes and second storage electrodes, and the first storage electrodes and the second storage electrodes are bar-shaped, the first storage electrodes are parallel to the scanning lines, and the second storage electrodes are parallel to the data lines, the first storage electrodes intersect with the second storage electrodes, and the first storage electrodes are insulated from the second storage electrodes.

2. The liquid crystal panel as claimed in claim 1 , wherein the liquid crystal panel is driven by driving methods including column inversion method, row inversion method, 2Line+1 driving method, and 2Line driving method.

3. The liquid crystal panel as claimed in claim 1 , wherein the liquid crystal panel further comprises peripheral wirings, when the liquid crystal panel is of a vertical electrical field mode, the peripheral wirings connects the storage electrode and a common electrode on a color film substrate of the liquid crystal panel.

4. The liquid crystal panel as claimed in claim 1 , wherein the liquid crystal panel further comprises peripheral wirings, when the liquid crystal panel is of a horizontal electrical field mode, the storage electrodes are connected by the peripheral wirings.

5. The liquid crystal panel as claimed in claim 1 , wherein the number of the first storage electrodes is the same with the numbers of the second storage electrodes and the pixel electrodes.

6. The liquid crystal panel as claimed in claim 5 , wherein the liquid crystal panel further comprises a gate driver and a data driver, the scanning lines connect with the gate driver, and the data lines connect with the data driver, the gate driver provides gate driving signals to the scanning lines in sequence to turn on the first TFT and the second TFT corresponding to the scanning lines, the data driver provides grayscale driving signals to the data lines such that the grayscale driving signals are applied to the pixel electrodes via the first TFT, and the grayscale driving signals applied to the pixel electrode is further applied to the storage electrode via the second TFT when the liquid crystal panel displays the previous frame.

7. A driving method of liquid crystal panels, the liquid crystal panel comprises at least one storage electrode, a plurality of scanning lines, a plurality of data lines, and a plurality of pixel areas arranged in a matrix defined by the scanning lines and the data lines, wherein each of the pixel areas comprises a pixel electrode, a first TFT and a second TFT, a source of the first TFT connects to the corresponding data line, a drain of the first TFT connects to the corresponding pixel electrode, a gate of the first TFT connects to the corresponding scanning line, the sources of the first TFTs within the same column connect to the same data line, the gates of the first TFT within the same row connect to the same scanning line, the first TFT is configured for driving the pixel electrode within the corresponding pixel area, the gate of the second TFT connects with the previous scanning line, one of the source and the drain of the second TFT connects to the corresponding pixel electrode within the pixel area, and the other one connects with the storage electrode, the driving method comprises:
receiving gate driving signals from the scanning lines and turning on the first TFT and the second TFT corresponding to the scanning lines; and
receiving grayscale driving signals from the data lines such that the grayscale driving signals are applied to the pixel electrodes via the first TFT, and the grayscale driving signals applied to the pixel electrode is further applied to the storage electrode via the second TFT when the liquid crystal panel displays the previous frame.

8. A liquid crystal panel, comprising:
at least one storage electrode, a plurality of scanning lines, a plurality of data lines, and a plurality of pixel areas arranged in a matrix defined by the scanning lines and the data lines, wherein each of the pixel areas comprises a pixel electrode, a first thin film transistor (TFT) and a second TFT, a source of the first TFT connects to the corresponding data line, a drain of the first TFT connects to the corresponding pixel electrode, a gate of the first TFT connects to the corresponding scanning line, the sources of the first TFTs within the same column connect to the same data line, the gates of the first TFT within the same row connect to the same scanning line, the first TFT is configured for driving the pixel electrode within the corresponding pixel area, the gate of the second TFT connects with the previous scanning line, one of the source and the drain of the second TFT connects to the corresponding pixel electrode within the pixel area, and the other one connects with the storage electrode, the storage electrodes comprises first storage electrodes and second storage electrodes, and the first storage electrodes and the second storage electrodes are bar-shaped, the first storage electrodes are parallel to the scanning lines, and the second storage electrodes are parallel to the data lines, the first storage electrodes intersect with the second storage electrodes, and the first storage electrodes are insulated from the second storage electrodes, wherein the liquid crystal panel further comprises peripheral wirings, when the liquid crystal panel is of a vertical electrical field mode, the peripheral wirings connects the storage electrode and a common electrode on a color film substrate of the liquid crystal panel, and wherein the number of the first storage electrodes is the same with the numbers of the second storage electrodes and the pixel electrodes.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Chen Cheng-Hung
• Jiang Jiali

Classifications

• G09G3/3685

  Details of drivers for data electrodes · CPC title

• G02F2001/134354

  Physics · mapped topic

• G09G2310/027

  Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters · CPC title

• G09G3/3614 Primary

  Control of polarity reversal in general · CPC title

• G09G3/3275

  Details of drivers for data electrodes · CPC title