Infrared light source module and projection device

A projection device, comprising:

• an illumination system for providing at least one of an illumination light beam and an IR light beam, the illumination system comprising:
• a visible light source module for providing the illumination light beam;
• and
• an IR light source module for providing the IR light beam, the IR light source module comprising:
• at least one circuit substrate;
• a plurality of first IR light-emitting elements disposed on the at least one circuit substrate, and the plurality of first IR light-emitting elements are used to provide a first light beam;
• and
• a plurality of second IR light-emitting elements disposed on the at least one circuit substrate, the plurality of second IR light-emitting elements are used to provide a second light beam, and the IR light beam comprises at least one of the first light beam and the second light beam,
• at least one light valve disposed on a transmission path of the illumination light beam and the IR light beam and used for converting the illumination light beam into a visible image light beam and converting the IR light beam into an IR image light beam;
• and
• a projection lens disposed on the transmission path of the visible image light beam and the IR image light beam, and used for projecting at least one of the visible image light beam and the IR image light beam out of the projection device, wherein a wavelength of the first light beam is greater than or equal to 700 nm and less than or equal to 780 nm, and a wavelength of the second light beam is greater than or equal to 780 nm and less than or equal to 1000 nm.