Patent ID: 8496333

Claim:
An illumination module, comprising: a first light emitting element, capable of emitting an excitation light beam; a wavelength conversion unit, disposed on a transmission path of the excitation light beam, for converting the excitation light beam into a first color light beam, wherein a wavelength of the first color light beam is different from a wavelength of the excitation light beam; a control unit, connected to the wavelength conversion unit, wherein the control unit is capable of driving the wavelength conversion unit to rotate and driving the wavelength conversion unit to shift relative to the excitation light beam; and a determining unit, electrically connected to the control unit, wherein when the determining unit determines that a shifting condition is satisfied, the determining unit instructs the control unit to shift the wavelength conversion unit relative to the excitation light beam, so as to change an irradiation position of the excitation light beam on the wavelength conversion unit, wherein the wavelength conversion unit is shifted to change a distance from the irradiation position of the excitation light beam on the wavelength conversion unit to a rotation center of the wavelength conversion unit.