A projector of the present invention includes a light source unit including a semiconductor light emitting element and a color wheel and emitting lights in first and second wavelength ranges in time division, a display device receiving light source light to form image light, a projection optical system for projecting the image light onto a projection target, a delay time setting module for shifting a start timing of a color mixing period when the lights in the first and second wavelength ranges are emitted in a mixed fashion in a spoke period of the color wheel during which emissions of the lights in the first and second wavelength ranges are switched over based on an index indicating a brightness of light from the light source unit, and a light source driving module for driving the light source unit based on a setting set by the delay time setting module.

A wheel includes a substrate and an optical layer. The substrate includes an inner substrate and multiple wave-shaped structures. The inner substrate has a first surface and a second surface opposite to the first surface. The optical layer is disposed on the first surface. An excitation beam is incident toward the optical layer. The wave-shaped structures are connected to and disposed around the inner substrate. A first portion of the wave-shaped structures connected to the inner substrate include at least a slope. A projection device is provided.

An illumination system includes a first light source, a wavelength conversion device, a first light-splitting element, a light-filtering device, and a light-homogenizing element. The first light source provides a first light beam. The wavelength conversion device includes a single wavelength conversion material configured to convert the first light beam into a conversion light beam. The first light-splitting element is disposed on transmission paths of the first light beam and the conversion light beam. The light-filtering device is disposed on the transmission paths of the first light beam and the conversion light beam. The light-homogenizing element is disposed on the transmission paths of the first light beam and the conversion light beam. When the first light beam is transmitted to the light-homogenizing element, the first light beam is not incident on the wavelength conversion device. A projection apparatus including the illumination system is also provided.

An illumination system configured to provide an illumination beam is provided and includes a light-source module and a first and a second wavelength conversion devices. The light-source module provides a first and a second excitation beams. The first wavelength conversion device is disposed on a path of the first excitation beam and has first regions and at least one first boundary disposed between every two adjacent first regions. The second wavelength conversion device is disposed on a path of the second excitation beam and has second regions and at least one second boundary disposed between every two adjacent second regions. The second regions correspond to the first regions. A time point when the first boundary gets into the path of the first excitation beam is different from a time point when the second boundary gets into the path of the second excitation beam. A projection apparatus is also provided.

Provided are a light source device capable of reducing color irregularities while having a compact size, and a projector including this light source device. A light source device includes: an excitation light irradiation unit 70 that emits excitation light; a rotary wheel unit 100 including a rotary wheel 101 having a filter region 104 that reflects or transmits light in a predetermined wavelength band different from a wavelength band of the excitation light and transmits the excitation light, and a transmission bending region 106 that bends and transmits the excitation light; and a fixed phosphor 200 that is irradiated with the excitation light transmitted through the filter region 104 and emits fluorescence including light in the predetermined wavelength band toward the filter region 104. The rotary wheel unit 100 is configured so that an optical axis of the excitation light that is transmitted through the rotary wheel 101 or is reflected from the rotary wheel 101 overlaps with an optical axis of the fluorescence in the predetermined wavelength band reflected from the filter region 104 or transmitted through the filter region 104.

A light source apparatus includes an excitation light shining device for emitting excitation light, a rotational wheel device including a rotational wheel including a filter area for transmitting light in a predetermined wavelength range differing from a wavelength range of the excitation light and reflecting the excitation light and a direction-changing transmission area for transmitting the excitation light while changing a direction thereof, and a luminescent light emission device which receives the excitation light reflected on the filter area to thereby emit luminescent light including the light in the predetermined wavelength range towards the filter area, and the rotational wheel device is disposed so that an axis of the excitation light which passes through the direction-changing transmission area and an axis of the luminescent light in the predetermined wavelength range which passes through the filter area are superposed on each other.

Provided is a light source device, including: a first light source module, a set of lenses, a first light-homogenization component, a first light-combination device, and a wavelength conversion device. The first light source module is configured to emit a first light beam having first wavelength. The set of lenses and the first light-homogenization component are located in propagation path of the first light beam. The set of lenses is configured to converge the first light beam. The first light-homogenization component is configured to homogenize the first light beam. A second light beam formed by homogenization is incident on the first light-combination device, and the first light-combination device is located at a focus position of the set of lenses. The wavelength conversion device is located in propagation path of a third light beam emitted from the first light-combination device and configured to form excited light having second wavelength under excitation.

A color gamut conversion module, a conversion method thereof, and a projection device are provided. The color gamut conversion module includes a wavelength conversion element and a light filtering element. The wavelength conversion element includes at least two wavelength conversion regions, and the light filtering element includes at least one filtering region. Each filtering region is a single-band light filtering region or a multi-band light filtering region. In a visible light transmittance spectrum, the single-band light filtering region includes a band-pass wave band, and the multi-band light filtering region includes a plurality of first band-pass wave bands and a plurality of first cut-off wave bands. In a first color gamut mode, the wavelength conversion element and the light filtering element rotate at a first relative rate. In a second color gamut mode, the wavelength conversion element and the light filtering element rotate at a second relative rate.

A color gamut conversion module, a conversion method thereof, and a projection device are provided. The color gamut conversion module includes a wavelength conversion element and a light filtering element. The wavelength conversion element includes at least two wavelength conversion regions, and the light filtering element includes at least one filtering region. Each filtering region is a single-band light filtering region or a multi-band light filtering region. In a visible light transmittance spectrum, the single-band light filtering region includes a band-pass wave band, and the multi-band light filtering region includes a plurality of first band-pass wave bands and a plurality of first cut-off wave bands. In a first color gamut mode, the wavelength conversion element and the light filtering element rotate at a first relative rate. In a second color gamut mode, the wavelength conversion element and the light filtering element rotate at a second relative rate.

A wavelength conversion element configured to receive an excitation light beam includes: a substrate configured to rotate about a central axis including a wavelength conversion region and a non-wavelength conversion region; and at least one wavelength conversion layer. When the substrate is rotated about the central axis, the non-wavelength conversion region and the wavelength conversion region alternately enter a transmission path of the excitation light beam. The substrate has a recessed portion located inside or outside of and surrounding the wavelength conversion region. The recessed portion includes an inclined surface. When the excitation light beam is incident on the inclined surface, the inclined surface reflects the excitation light beam to the wavelength conversion layer, and the wavelength conversion layer converts the excitation light beam into a converted beam. When the excitation light beam is incident on the non-wavelength conversion region, the non-wavelength conversion region reflects the excitation light beam.