Illumination system and projection device

An illumination system, configured to provide an illumination beam and comprising a first excitation light source, a wavelength conversion element, and a controller, wherein

• the first excitation light source is configured to provide a first excitation beam;
• the wavelength conversion element is located on a transmission path of the first excitation beam and comprises a plurality of wavelength conversion regions and a plurality of non-wavelength conversion regions alternately arranged in a circumferential direction;
• and
• the controller controls whether the first excitation light source emits the first excitation beam, wherein
• during a first time interval, the controller turns off the first excitation light source;
• and
• during a second time interval, the controller controls the first excitation light source to emit the first excitation beam, and the first excitation beam is transmitted to one of the plurality of wavelength conversion regions to form a converted beam, wherein the illumination beam comprises the converted beam,
• wherein the wavelength conversion element further comprises a rotary disk, and the rotary disk comprises a body portion and a plurality of extension portions extending outward from the body portion and separated from each other in the circumferential direction, the plurality of wavelength conversion regions are respectively located on the plurality of extension portions, and each of the non-wavelength conversion regions is located between two of the extension portions.

An illumination system, configured to provide an illumination beam and comprising a first excitation light source, a wavelength conversion element, and a controller, wherein

• the first excitation light source is configured to provide a first excitation beam;
• the wavelength conversion element is located on a transmission path of the first excitation beam and comprises a plurality of wavelength conversion regions and a plurality of non-wavelength conversion regions alternately arranged in a circumferential direction;
• and
• the controller controls whether the first excitation light source emits the first excitation beam, wherein
• during a first time interval, the controller turns off the first excitation light source;
• and
• during a second time interval, the controller controls the first excitation light source to emit the first excitation beam, and the first excitation beam is transmitted to one of the plurality of wavelength conversion regions to form a converted beam, wherein the illumination beam comprises the converted beam,
• wherein at least one of the plurality of wavelength conversion regions is provided with a first sub-wavelength conversion region and a second sub-wavelength conversion region connected to each other, and colors of converted beams respectively formed by the first sub-wavelength conversion region and the second sub-wavelength conversion region are different from each other, wherein
• the second time interval further comprises a first color time interval, a second color time interval, a first idle time interval, a previous idle time interval, and a post idle time interval, the first idle time interval is between the first color time interval and the second color time interval, the previous idle time interval is before the first color time interval, and the post idle time interval is after the second color time interval, wherein
• during the first color time interval and the second color time interval, the controller controls the first excitation light source to emit light, and the first excitation beam is respectively transmitted to the first sub-wavelength conversion region and the second sub-wavelength conversion region;
• during the first idle time interval a, the controller turns off the first excitation light source, the first idle time interval corresponds to a boundary between the first sub-wavelength conversion region and the second sub-wavelength conversion region;
• during the previous idle time interval, the controller turns off the first excitation light source, the previous idle time interval corresponds to a boundary between the first sub-wavelength conversion region and one of the non-wavelength conversion regions adjacent to the first sub-wavelength conversion region;
• and
• during the post idle time interval, the controller turns off the first excitation light source, the post idle time interval corresponds to a boundary between the second sub-wavelength conversion region and the other one of the non-wavelength conversion regions adjacent to the second sub-wavelength conversion region.

An illumination system, configured to provide an illumination beam and comprising a first excitation light source, a wavelength conversion element, and a controller, wherein

• the first excitation light source is configured to provide a first excitation beam;
• the wavelength conversion element is located on a transmission path of the first excitation beam and comprises a plurality of wavelength conversion regions and a plurality of non-wavelength conversion regions alternately arranged in a circumferential direction, wherein each of the non-wavelength conversion regions comprises a hollow region;
• and
• the controller controls whether the first excitation light source emits the first excitation beam, wherein
• during a first time interval, the controller controls the first excitation light source to emit the first excitation beam, so that the first excitation beam is transmitted to and penetrates one of the plurality of non-wavelength conversion regions;
• and
• during a second time interval, the controller controls the first excitation light source to emit the first excitation beam, and the first excitation beam is transmitted to one of the plurality of wavelength conversion regions to form a converted beam, wherein the illumination beam comprises the converted beam.

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

• the illumination system is configured to provide an illumination beam and comprises a first excitation light source, a wavelength conversion element, and a controller, wherein
• the first excitation light source is configured to provide a first excitation beam;
• the wavelength conversion element is located on a transmission path of the first excitation beam and comprises a plurality of wavelength conversion regions and a plurality of non-wavelength conversion regions alternately arranged in a circumferential direction;
• and
• the controller controls whether the first excitation light source emits the first excitation beam, wherein
• during a first time interval, the controller turns off the first excitation light source;
• and
• during a second time interval, the controller controls the first excitation light source to emit the first excitation beam, and the first excitation beam is transmitted to one of the plurality of wavelength conversion regions to form a converted beam, wherein the illumination beam comprises the converted beam,
• wherein the second time interval further comprises a color time interval, a previous idle time interval, and a post idle time interval, the previous idle time interval is before the color time interval, and the post idle time interval is after the color time interval, wherein
• during the color time interval, the controller controls the first excitation light source to emit the first excitation beam, and the first excitation beam is transmitted to one of the plurality of wavelength conversion regions;
• during the previous idle time interval, the controller turns off the first excitation light source, and the previous idle time interval corresponds to a boundary between one of the plurality of wavelength conversion regions and one of the non-wavelength conversion regions adjacent to the one of the plurality of wavelength conversion regions;
• and
• during the post idle time interval, the controller turns off the first excitation light source, and the post idle time interval corresponds to a boundary between the one of the plurality of wavelength conversion regions and the other one of the non-wavelength conversion regions adjacent to the one of the plurality of wavelength conversion regions;
• the light valve is disposed on a transmission path of the illumination beam and converts the illumination beam into an image beam;
• and
• the projection lens is disposed on a transmission path of the image beam.

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

• the illumination system is configured to provide an illumination beam and comprises a first excitation light source, a wavelength conversion element, and a controller, wherein
• the first excitation light source is configured to provide a first excitation beam;
• the wavelength conversion element is located on a transmission path of the first excitation beam and comprises a plurality of wavelength conversion regions and a plurality of non-wavelength conversion regions alternately arranged in a circumferential direction, wherein each of the non-wavelength conversion regions comprises a hollow region;
• and
• the controller controls whether the first excitation light source emits the first excitation beam, wherein
• during a first time interval, the controller controls the first excitation light source to emit the first excitation beam, so that the first excitation beam is transmitted to and penetrates one of the plurality of non-wavelength conversion regions;
• and
• during a second time interval, the controller controls the first excitation light source to emit the first excitation beam, and the first excitation beam is transmitted to one of the plurality of wavelength conversion regions to form a converted beam, wherein the illumination beam comprises the converted beam;
• the light valve is disposed on a transmission path of the illumination beam and converts the illumination beam into an image beam;
• and
• the projection lens is disposed on a transmission path of the image beam.