A display panel and a thin film transistor (TFT) array substrate are disclosed. A peripheral electrode, a first bar-shaped electrode array, a second bar-shaped electrode array, a third bar-shaped electrode array, and a fourth bar-shaped electrode array are included in a pixel electrode in the display panel. The first bar-shaped electrode array, the second bar-shaped electrode array, the third bar-shaped electrode array, and the fourth bar-shaped electrode array respectively are disposed on a first area, a second area, a third area, and a fourth area which are surrounded by the peripheral electrode. The peripheral electrode connects with the first bar-shaped electrode array, the second bar-shaped electrode array, the third bar-shaped electrode array, and the fourth bar-shaped electrode array. The penetration rate of a pixel unit can be improved by the present invention.