Provided are an array substrate and a liquid crystal display panel. In the array substrate, each pixel unit (14) comprises a first pixel electrode (Ml), a second pixel electrode (M2) and a third pixel electrode (M3), wherein the third pixel electrode (M3) is connected to the second pixel electrode (M2) through a third switch (T3). In a 2D display mode, the third switch (T3) is switched on so as to enable the second pixel electrode (M2) to be electrically connected to the third pixel electrode (M3), to enable the three pixel electrodes (Ml, M2, M3) all in a state of an image displaying a corresponding 2D picture, and enable the voltage of the second pixel electrode (M2) to be changed via the voltage of the third pixel electrode (M3); In a 3D display mode, the second pixel electrode (M2) is made not to be in communication with the third pixel electrode (M3), so as to enable the third pixel electrode (M3) to be in a state of an image displaying a corresponding black picture. In the above-mentioned manner, the aperture ratio in the 2D display mode can be improved and the colour distortion in a large viewing angle can be reduced, and meanwhile, the binocular signal crosstalk in the 3D display mode can be reduced.
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