1. Field of the Invention
The present invention generally relates to a thin film transistor (TFT) array substrate, in particular, to a TFT array substrate with capacitance compensating lines.
2. Description of Related Art
In recent years, the development of liquid crystal display television (LCD-TV) has been developed toward high resolution and large size. In a large-sized LCD panel, signal distortion may be caused due to overall RC delay of the LCD panel. Accordingly, the driver IC in a large-sized LCD panel has to be designed with strong driving capability in order to maintain the display uniformity of the LCD panel at a specific standard. On the other hand, in a high-resolution display panel having a driving frequency of 120 Hz (Full HD; 1920×1080), overheat issue on the driver IC may be caused because of the high polarity conversion frequency when a general dot inversion driving method is adopted to improve the image quality of the display panel. In this case, overheat issue on the driver IC can be significantly reduced if the polarity conversion frequency of the driver IC can be reduced. Accordingly, the problems of overheat issue on the driver IC and RC delay can be resolved when a column inversion driving method can be adopted for driving the display panel.
However, there are still some other problems in image presentation to be resolved even if the column inversion driving method is adopted. For example, bright/dark lines and serious cross-talk may be produced when dynamic images are displayed. To resolve these problems, an alternative type pixel layout is disclosed in U.S. Pat. No. 6,822,718, when the display panel having the above-mentioned alternative type pixel layout is driven through column inversion driving method, the display quality thereof is similar with the display quality provided by display panel that is driven through dot inversion driving method. Since the problem of overheat issue on driver IC will not be produced by the column inversion driving method, the problems of bright/dark lines, cross-talk, and overheat issue on driver IC can all be effectively resolved by the U.S. Pat. No. 6,822,718. However, it should be noted that in the pixel layout provided by the U.S. Pat. No. 6,822,718, TFTs are disposed alternatively and which reduces the regularity of the photomask pattern used for fabricating the TFTs. Accordingly, mis-aligment may occur and black matrix having sufficient area is required to prevent light-leakage. As a result, both the aperture ratio of the display area and the size of the display area are reduced.