Abstract: An RGBW TFT LCD includes a backlight module, a first polarizer, a TFT array substrate, a liquid crystal layer, a color filter and a second polarizer. The TFT array substrate includes a plurality of pixels each consisting of a red sub-pixel, a green sub-pixel, a blue sub-pixel and a white sub-pixel arranged in a 2×2 matrix. Data lines and dummy data lines are alternately arranged wherein each column of the sub-pixels is arranged between a data line and a dummy data line which is in electrical connection with a lower common electrode in electrical connection with a storage capacitor for each sub-pixel. Two scan lines are located between two neighboring rows of the sub-pixels. The sub-pixels are driven by either column inversion or dot inversion. The four sub-pixels of a pixel are electrically connected to a common data line and a respective scan line.