A color wheel module includes a driving assembly, a substrate, a first wavelength conversion layer, and a second wavelength conversion layer. The substrate includes 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. The first wavelength conversion layer is disposed on the first light conversion region. The second wavelength conversion layer is disposed on the second light conversion region. The first excitation beam is incident to the first light conversion region along a direction perpendicular to the central axis and is converted into a first color converted beam. The second excitation beam is incident to the second light conversion region along a direction parallel to the central axis and is converted into a second color converted beam.

A color wheel module is disposed on a transmission path of an excitation beam and includes a driving assembly, a substrate, a fastening element, at least one wavelength conversion layer, and filters. The substrate is connected to the filters, and the filters are fixed between the fastening element and the driving assembly. The substrate includes an outer periphery and a light conversion region located on the outer periphery. The outer periphery extends in an extension direction and has a width parallel to the extension direction. The extension direction and a radial direction of the substrate forms an included angle. The wavelength conversion layers are disposed in the light conversion region. The excitation beam is incident on the light conversion region of the substrate and converted into a conversion beam, and the conversion beam is guided to penetrate the corresponding filter along a direction parallel to the central axis.

A light source system and a projection system, comprising a light source; a switching system switching light emitted by the light source into at least two light beams having a preset proportion in the manner of time division or light intensity division; a color wheel assembly located in a transmission light path of each light beam of the at least two light beams, with the color wheel assembly generating light having different colors and a preset proportion under the irradiation of each light beam of the at least two light beams, and light of different colors being able to synthesize a projection image after being modulated by a light modulation system, wherein the switching system can adjust the proportion of the at least two light beams according to the parameters of the projection image, so as to adjust the proportion of the light of different colors.

An illumination device for a light modulated projector includes a first and a second colour wheel. A first filter surface of the first colour wheel comprises at least three first surface sections arranged one behind the other, which protrude into an illumination beam path of the illumination device successively on rotation and in each case convey illumination radiation of a different partial range of the visible wavelength range. At least one of the first surface sections of the first filter surface conveys illumination radiation from the infrared range. A second filter surface of the second colour wheel comprises a first surface segment which only conveys illumination radiation from the visible wavelength range and a second surface segment which only conveys illumination radiation from the infrared range. The first and second surface segments protrude into the illumination beam path successively on rotation.

A light source unit according to an aspect of the invention includes a first semiconductor light emitting device disposed centrally and a second semiconductor light emitting device disposed outwards of the first semiconductor light emitting device, the first and second semiconductor light emitting devices emitting lights, and a first collimator lens disposed centrally and a second collimator lens disposed outwards of the first collimator lens, the first and second collimator lenses being disposed so as to correspond to the first and second semiconductor light emitting devices, respectively, on sides of the first and second semiconductor light emitting devices from which the lights are emitted, and a degree at which the light of the first semiconductor light emitting device is collected onto an illuminated surface differs from a degree at which the light of the second semiconductor light emitting device is collected onto the illuminated surface.

A projector includes a light source, a filter unit, an auxiliary light source and a combiner. The light source produces a first beam of light having light in a plurality of ranges of wavelengths, corresponding to a plurality of colors. The filter unit is positioned in the optical path of the first light beam. The filter unit is configured in a first configuration during a first time interval and in a second configuration during a second time interval. When the filter unit is configured in the second configuration, the auxiliary light source produces a second beam of light. The combiner combines the first beam of light and the second beam of light. The combined beams of light are directed to a spatial light modulator.

A projector includes a light source, a filter unit, an auxiliary light source and a combiner. The light source produces a first beam of light having light in a plurality of ranges of wavelengths, corresponding to a plurality of colors. The filter unit is positioned in the optical path of the first light beam. The filter unit is configured in a first configuration during a first time interval and in a second configuration during a second time interval. When the filter unit is configured in the second configuration, the auxiliary light source produces a second beam of light. The combiner combines the first beam of light and the second beam of light. The combined beams of light are directed to a spatial light modulator.

A light source apparatus includes a rotational wheel device having a rotational wheel including a reflection area configured to reflect light in the blue wavelength range, and a transmission area configured to transmit at least light in the red wavelength range and light in the green wavelength range and a dichroic mirror configured to transmit light in the blue wavelength range and light in the red wavelength range and reflect light in the green wavelength range, and the dichroic mirror includes an intersecting portion which intersects apart of the rotational wheel in an overlapping manner and on which light in the blue wavelength range, light in the red wavelength range, and light in the green wavelength range are shined.

A wavelength conversion module including a substrate, a wavelength conversion layer and at least one wing is provided. The substrate has a wavelength conversion area, a non-wavelength conversion area and at least one through hole. The through hole penetrates through the substrate and is located in the non-wavelength conversion area. The wavelength conversion layer is disposed in the wavelength conversion area of the substrate. The wing is disposed in the non-wavelength conversion area of the substrate. When the substrate reaches a first temperature range, the wing closes the through hole. When the substrate reaches a second temperature range, at least one airflow channel is formed between the wing and the through hole. The wavelength conversion module of the invention and the projection device using the same effectively reduce a temperature of the wavelength conversion module, and thus have better reliability.

A projection display apparatus of the present disclosure includes a solid state light source discharging blue light in a first wavelength range; a wheel having a transmission part transmitting blue light and a first light-emitting body emitting light in response to irradiation with blue light; a second light-emitting body emitting light in a second wavelength range closer to the longer wavelengths than the first wavelength range is and adjacent to the first wavelength range, in response to irradiation with blue light that has passed through the transmission part; a light uniformizing element uniformizing the blue light and the light emitted from the first and second light-emitting body; a light modulation element modulating the light uniformized by the light uniformizing element; and projection unit projecting the light modulated by the light modulation element.