Use blue laser diode as light source to replace high intensity discharge (HID) lamp. In order to generate the red, green, blue three primary colors, diode laser throw the laser to a fluorescent pink wheel, resulting in yellow (red and green additive color mixing). Blue laser can be generated when the blue laser passes through the diffuser. Then the projector will separate the color sequentially transmit through a color wheel, cast to an imaging surface, such as DLP chipset. Then the imaging surface of the light transmit through the lens and hit on the projection screen.