Illumination system and projection apparatus

An illumination system, configured to provide an illumination beam, the illumination system comprising:

• an excitation light source, wherein the excitation light source is configured to emit an excited beam;
• and
• a wavelength conversion module, wherein the wavelength conversion module is located on a transmission path of the excited beam, and having an annular wavelength conversion region and a non-conversion region, wherein the wavelength conversion module comprises:
• a substrate;
• and
• an annular wavelength conversion layer, located on the substrate, and disposed corresponding to the annular wavelength conversion region, wherein when the excited beam is transmitted to the wavelength conversion module, the excited beam forms a light spot on the wavelength conversion module, at least part of the light spot is located on the annular wavelength conversion region, and a first part of the excited beam is incident to the annular wavelength conversion region and converted into a first color light, and a second part of the excited beam is incident to the wavelength conversion module to form a second color light, wherein the first color light and the second color light are simultaneously emitted out of the wavelength conversion module, and the illumination beam comprises the first color light and the second color light, and a proportional value range of the second part of the excited beam and the excited beam ranges between 5% and 30%, wherein at least part of the light spot is located on the non-conversion region, and the second part of the excited beam is incident to the non-conversion region to form the second color light,
• wherein the annular wavelength conversion layer has a plurality of dot-like microstructures, the dot-like microstructures are made of a wavelength conversion material, the dot-like microstructures have cavities there between without configuring the wavelength conversion material, and the cavities correspond to the non-conversion region, wherein the second part of the excited beam forms the second color light after passing through the non-conversion region of the wavelength conversion module.

An illumination system, configured to provide an illumination beam, the illumination system comprising:

• an excitation light source, wherein the excitation light source is configured to emit an excited beam;
• a wavelength conversion module, wherein the wavelength conversion module is located on a transmission path of the excited beam, and having an annular wavelength conversion region, wherein the wavelength conversion module comprises:
• a substrate, wherein the substrate is a reflection substrate;
• and
• an annular wavelength conversion layer, located on the substrate, and disposed corresponding to the annular wavelength conversion region, wherein when the excited beam is transmitted to the wavelength conversion module, the excited beam forms a light spot on the wavelength conversion module, at least part of the light spot is located on the annular wavelength conversion region, and a first part of the excited beam is incident to the annular wavelength conversion region and converted into a first color light, and a second part of the excited beam is incident to the wavelength conversion module to form a second color light, wherein the first color light and the second color light are simultaneously emitted out of the wavelength conversion module, and the illumination beam comprises the first color light and the second color light, and a proportional value range of the second part of the excited beam and the excited beam ranges between 5% and 30%, wherein colors of the second color light and the excited beam are the same;
• a fourth dichroic element, located between the excitation light source and the wavelength conversion module, wherein the fourth dichroic element has a first region and a second region, and the second region surrounds the first region;
• and
• an auxiliary light source, configured to emit an auxiliary beam, and a waveband of the auxiliary beam being at least partially overlapped with a waveband of the first color light, wherein the auxiliary beam, the first color light and the second color light are combined to form the illumination beam after passing through the fourth dichroic element.

An illumination system, configured to provide an illumination beam, the illumination system comprising:

• an excitation light source, wherein the excitation light source is configured to emit an excited beam;
• a wavelength conversion module, wherein the wavelength conversion module is located on a transmission path of the excited beam, and having an annular wavelength conversion region and a non-conversion region, wherein the wavelength conversion module comprises:
• a substrate, wherein the substrate is a reflection substrate;
• and
• an annular wavelength conversion layer, located on the substrate, and disposed corresponding to the annular wavelength conversion region;
• and
• a first annular reflection region and a second annular reflection region, the first annular reflection region and the second annular reflection region are located on the substrate and correspond to the non-conversion region, wherein the annular wavelength conversion layer is located between the first annular reflection region and the second annular reflection region, and the annular wavelength conversion layer surrounds the first annular reflection region, and is surrounded by the second annular reflection region, wherein when the excited beam is transmitted to the wavelength conversion module, the excited beam forms a light spot on the wavelength conversion module, at least part of the light spot is located on the annular wavelength conversion region, and a first part of the excited beam is incident to the annular wavelength conversion region and converted into a first color light, and a second part of the excited beam is incident to the wavelength conversion module to form a second color light, wherein the first color light and the second color light are simultaneously emitted out of the wavelength conversion module, and the illumination beam comprises the first color light and the second color light, and a proportional value range of the second part of the excited beam and the excited beam ranges between 5% and 30%, wherein colors of the second color light and the excited beam are the same, and the illumination system further comprises:
• a fifth dichroic element, a sixth dichroic element, a first condensing lens group and a second condensing lens group, wherein
• the fifth dichroic element is located between the excitation light source and the wavelength conversion module;
• the first condensing lens group is located between the fifth dichroic element, the sixth dichroic element and the wavelength conversion module, the sixth dichroic element is pervious to a part of the second color light, and reflects another part of the second color light, wherein
• the excited beam from the excitation light source is guided to the first condensing lens group by the fifth dichroic element, and is obliquely incident to the wavelength conversion module through the first condensing lens group to form the first color light and the second color light;
• the first color light from the wavelength conversion module is obliquely incident to the first condensing lens group, and is transmitted to the second condensing lens group after passing through the fifth dichroic element and the sixth dichroic element;
• the second color light from the wavelength conversion module is obliquely incident to the first condensing lens group;
• and after passing through the sixth dichroic element, a part of the second color light is transmitted to the fifth dichroic element and is then transmitted to the second condensing lens group, and another part of the second color light is transmitted to the second condensing lens group;
• the second condensing lens group is configured to converge the second color light and the first color light from the fifth dichroic element and the sixth dichroic element.