TFT-LCD array substrate and manufacturing method thereof

1. A thin film transistor liquid crystal display (TFT-LCD) array substrate comprising:

a plurality of gate lines and a plurality of data lines formed on a substrate, and

a plurality of pixel regions defined by the gate lines and the data lines,

wherein a pixel electrode, a first thin film transistor for controlling the charge of the pixel electrode and a second thin film transistor for controlling the pre-charge of the pixel electrode are formed in each pixel region,

wherein for each pixel region, the gate line comprising an operation gate line and a pre-charge gate line, the first thin film transistor is connected with the operation gate line, and the second thin film transistor is connected with the pre-charge gate line, and

wherein the second thin film transistor comprises a second gate electrode, a first connection electrode and a second connection electrode, the second gate electrode is connected with the pre-charge gate line, one end of the first connection electrode is provided above the second gate electrode and the other end thereof is connected with the second connection electrode in an adjacent pixel region on one side, one end of the second connection electrode is provided above the second gate electrode and the other end thereof is connected with the first connection electrode in an adjacent pixel region on the other side, and the first connection electrode or the second connection electrode is connected with the pixel electrode.

2. The TFT-LCD array substrate according to claim 1 , wherein the pre-charge gate line is parallel to and operates simultaneously with the operation gate line in a previous pixel row.

3. The TFT-LCD array substrate according to claim 1 , wherein the operation gate line is parallel to and connected with the pre-charge gate line in a previous pixel row.

4. The TFT-LCD array substrate according to claim 1 , wherein for each pixel region, two gate lines adjacent to the pixel electrode are respectively defined as the operation gate line and the pre-charge gate line, and the pre-charge gate line is also used as the operation gate line in a previous pixel row.

5. The TFT-LCD array substrate according to claim 1 , wherein the second gate electrode is formed on the substrate, an gate insulating layer covers the second gate electrode, an second active layer is formed on the gate insulating layer and positioned over the second gate electrode, a second TFT channel region is formed between the first connection electrode and the second connection electrode, a passivation layer is formed on the second thin film transistor, a second via hole is provided in the passivation layer, the second via hole is used to connect the first connection electrode or the second connection electrode with the pixel electrode.

6. The TFT-LCD array substrate according to claim 5 , wherein the first connection electrode and the second connection electrode are provided in the same layer as that of the data line, a third via hole and a fourth via hole are further provided in the passivation layer, a third connection electrode is provided in the same layer as that of the pixel electrode, the first connection electrode is connected with the second connection electrode in an adjacent pixel region on one side in a same pixel row by the third connection electrode through the third via hole of the passivation layer, and the second connection electrode is connected with the first connection electrode in an adjacent pixel region on the other side in the same pixel row by the third connection electrode through the fourth via hole in the passivation layer.

7. The TFT-LCD array substrate according to claim 5 , wherein the first connection electrode and the second connection electrode are formed on an insulating layer covering the date line, the first connection electrode is directly connected with the second connection electrode in an adjacent pixel region in a same pixel row.