Illumination system and projection device

An illumination system, configured to provide an illumination light and comprising a first laser light source, a wavelength conversion module, a first light splitting element, and a microlens array, wherein

• the first laser light source is configured to provide a first laser light;
• the wavelength conversion module is located on a transmission path of the first laser light, wherein the wavelength conversion module comprises at least one wavelength conversion region and at least one non-conversion region, and the wavelength conversion module is configured to rotate, such that the at least one wavelength conversion region and the at least one non-conversion region are alternately cut into the transmission path of the first laser light;
• the first light splitting element is located on the transmission path of the first laser light, wherein when the first laser light is incident to the at least one non-conversion region of the wavelength conversion module, the first laser light forms a first color light by the first light splitting element and the at least one non-conversion region of the wavelength conversion module, and when the first laser light is incident to the at least one wavelength conversion region of the wavelength conversion module, the first laser light forms at least one second color light by the first light splitting element and the wavelength conversion module;
• and
• the microlens array is located on transmission paths of the first color light and the at least one second color light, and the microlens array is configured to homogenize the first color light and the at least one second color light,
• wherein the at least one wavelength conversion region comprises a first wavelength conversion region and a second wavelength conversion region, and the at least one second color light comprises a first sub-color light and a second sub-color light, wherein when the first laser light is incident to the first wavelength conversion region of the wavelength conversion module, the first laser light forms the first sub-color light by the first light splitting element and the wavelength conversion module, when the first laser light is incident to the second wavelength conversion region of the wavelength conversion module, the first laser light forms the second sub-color light by the first light splitting element and the wavelength conversion module, and peak wavelength ranges of the first color light, the first sub-color light, and the second sub-color light do not overlap each other.

An illumination system, configured to provide an illumination light and comprising a first laser light source, a wavelength conversion module, a filter module, and a microlens array;

• wherein
• the first laser light source is configured to provide a first laser light;
• the wavelength conversion module is located on a transmission path of the first laser light, wherein the wavelength conversion module comprises at least one wavelength conversion region, and the wavelength conversion module is configured to rotate, such that the at least one wavelength conversion region is cut into the transmission path of the first laser light;
• the filter module is located on the transmission path of the first laser light, wherein the filter module has a first surface and a second surface opposite to each other, where the first surface faces the wavelength conversion module, the filter module is disposed with a transmissive region and a splitting region on the first surface, and a diffusing region and a filter optical region on the second surface, where the diffusing region and the transmissive region are opposite to each other, and the splitting region and the filter optical region are opposite to each other, and the filter module is configured to rotate, such that the transmissive region and the splitting region are cut into the transmission path of the first laser light in turn, wherein when the transmissive region is cut into the transmission path of the first laser light, the first laser light forms a first color light after passing through the transmissive region and the diffusing region of the filter module, and when the splitting region is cut into the transmission path of the first laser light, the first laser light forms at least one second color light by the splitting region of the filter module, the at least one wavelength conversion region of the wavelength conversion module, and the filter optical region of the filter module;
• and
• the microlens array is located on transmission paths of the first color light and the at least one second color light, and is configured to homogenize the first color light and the at least one second color light, wherein the first color light and the at least one second color light form the illumination light in different time intervals after passing through the microlens array.