Projection device and illumination system thereof

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

• the illumination system comprises a light source, a lens array, a condenser lens, and a wavelength conversion element, wherein:
• the light source is for providing a light beam;
• the lens array is disposed on a transmission path of the light beam, the lens array comprises a plurality of lenses, each of the lenses has a first surface and a second surface opposite to each other, each of the first surfaces is adjacent to the light source, and each of the first surface or each of the second surfaces is an aspherical surface;
• the condenser lens is disposed on the transmission path of the light beam and for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam;
• and
• the wavelength conversion element is for receiving the condenser light beam and converting at least a portion of the condenser light beam into a converted light beam;
• the light valve is disposed on a transmission path of the converted light beam and for converting the converted light beam into an image light beam;
• and
• the projection lens is disposed on a transmission path of the image light beam,
• wherein the illumination system further comprises a light integration rod disposed on a transmission path of the converted light beam and for receiving the converted light beam from the wavelength conversion element and transmitting the converted light beam to the light valve, wherein an aspect ratio of the condenser light beam is the same as an aspect ratio of an opening of the light integration rod.

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

• the illumination system comprises a light source, a lens array, a condenser lens, and a wavelength conversion element, wherein:
• the light source is for providing a light beam;
• the lens array is disposed on a transmission path of the light beam, the lens array comprises a plurality of lenses, each of the lenses has a first surface and a second surface opposite to each other, each of the first surfaces is adjacent to the light source, and each of the first surface or each of the second surfaces is an aspherical surface;
• the condenser lens is disposed on the transmission path of the light beam and for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam;
• and
• the wavelength conversion element is for receiving the condenser light beam and converting at least a portion of the condenser light beam into a converted light beam;
• the light valve is disposed on a transmission path of the converted light beam and for converting the converted light beam into an image light beam;
• and
• the projection lens is disposed on a transmission path of the image light beam,
• wherein a length and a width of the condenser light beam have a first ratio, and a length and a width of an outer edge contour of the first surface have a second ratio, wherein a ratio of the first ratio to the second ratio is between 0.75 and 1.3.

An illumination system, comprising a light source, a lens array, a condenser lens, and a wavelength conversion element, wherein:

• the light source is for providing a light beam;
• the lens array is disposed on a transmission path of the light beam, the lens array comprises a plurality of lenses, each of the lenses has a first surface and a second surface opposite to each other, each of the first surfaces is adjacent to the light source, and each of the first surfaces or each of the second surfaces is an aspherical surface;
• the condenser lens is disposed on the transmission path of the light beam and for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam, wherein the energy of a central region of the condenser light beam is lower than the highest energy of the condenser light beam;
• and
• the wavelength conversion element is for receiving the condenser light beam and converting at least a portion of the condenser light beam into a converted light beam.

An illumination system, comprising a light source, a lens array, a condenser lens, and a wavelength conversion element, wherein:

• the light source is for providing a light beam;
• the lens array is disposed on a transmission path of the light beam, the lens array comprises a plurality of lenses, each of the lenses has a first surface and a second surface opposite to each other, each of the first surfaces is adjacent to the light source, and each of the first surfaces or each of the second surfaces is an aspherical surface;
• the condenser lens is disposed on the transmission path of the light beam and for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam;
• and
• the wavelength conversion element is for receiving the condenser light beam and converting at least a portion of the condenser light beam into a converted light beam,
• wherein the illumination system further comprises a light integration rod disposed on a transmission path of the converted light beam and for receiving the converted light beam from the wavelength conversion element and transmitting the converted light beam to the light valve, wherein an aspect ratio of the condenser light beam is the same as an aspect ratio of an opening of the light integration rod.

An illumination system, comprising a light source, a lens array, a condenser lens, and a wavelength conversion element, wherein:

• the light source is for providing a light beam;
• the lens array is disposed on a transmission path of the light beam, the lens array comprises a plurality of lenses, each of the lenses has a first surface and a second surface opposite to each other, each of the first surfaces is adjacent to the light source, and each of the first surfaces or each of the second surfaces is an aspherical surface;
• the condenser lens is disposed on the transmission path of the light beam and for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam;
• and
• the wavelength conversion element is for receiving the condenser light beam and converting at least a portion of the condenser light beam into a converted light beam,
• wherein a length and a width of the condenser light beam have a first ratio, and a length and a width of an outer edge contour of the first surface have a second ratio, wherein a ratio of the first ratio to the second ratio is between 0.75 and 1.3.