The invention relates to a pixel unit and a display method. The pixel unit includes a first pixel and a second pixel. The first pixel receives an AC voltage source having a reference voltage for displaying a predetermined a grey scale luminance. The second pixel receives a data signal. The update frequency of the AC voltage source is smaller than the update frequency of the data signal. The pixel unit and the display method can overcome the problem of poor user impression due to the observation of color separation when a user watches a display apparatus which adopts field sequential.