A display method for reducing image delay includes setting a transmission rate of a panel data clock signal of a display panel, setting a vertical synchronization period of a vertical synchronization signal according to at least the transmission rate of the panel data clock signal, and adjusting an image data clock signal outputted from a signal source according to the vertical synchronization period for synchronizing the panel data clock signal and the image data clock signal. The vertical synchronization period includes a first active interval and a first blanking interval. The image data clock signal has a period including a second active interval and a second blanking interval. A time offset between the first active interval and the second active interval is minimized. A time offset between the first blanking interval and the second blanking interval is minimized.