Color wheel module and projection device

A projection device, comprising an illumination module, a light valve, and a projection lens, wherein

• the illumination module comprises a light source device, a lens, and a color wheel module, the illumination module is configured for providing an illumination beam, the light source device is configured to provide a first excitation beam and a second excitation beam, the color wheel module is disposed on a transmission path of the first excitation beam and the second excitation beam, the color wheel module is located between the light source device and the light valve, the lens is located between the light source device and the color wheel module, and the color wheel module comprises a driving assembly, a substrate, a first wavelength conversion layer, and a second wavelength conversion layer;
• wherein
• the substrate is connected to a rotating shaft of the driving assembly, and the driving assembly drives the substrate to rotate while taking the rotating shaft of the driving assembly as a central axis;
• the substrate comprises an outer periphery disposed around the central axis and a first surface perpendicular to the central axis and has a first light conversion region located on the outer periphery and a second light conversion region located on the first surface, an included angle is formed between an extending direction of the outer periphery and a radial direction of the substrate, and the outer periphery has a width parallel to the extending direction;
• the first wavelength conversion layer is disposed on the first light conversion region of the substrate;
• and
• the second wavelength conversion layer is disposed on the second light conversion region of the substrate;
• wherein the first excitation beam is incident to the first light conversion region of the substrate along a direction perpendicular to the central axis and is converted into a first color converted beam, and the second excitation beam is incident to the second light conversion region of the substrate along a direction parallel to the central axis and is converted into a second color converted beam, and the illumination beam comprises at least one of the first color converted beam and the second color converted beam;
• the light valve is disposed on a transmission path of the illumination beam to convert the illumination beam into an image beam;
• and
• the projection lens is disposed on a transmission path of the image beam to project the image beam out of the projection device.