The present invention provides a method of raising a pure color image brightness of four primary colors, employed to raise a display brightness of a four primary colors display panel as showing a pure color image, and the method comprises: deactivating a W pixel of the display panel and changing gamma values of a R pixel, a G pixel, a B pixel from a first predetermined values to a second predetermined value; and activating the W pixel, and adjusting a gray scale image of the entire display panel to be a first predetermined value. The present invention further provides a display panel and a display. The display panel, the display and the method of the present invention can raise the display brightness of the display panel as showing the pure color image.