Abstract: An illumination system including a first laser light source, a second laser light source, and a wavelength conversion module is provided. The first laser light source provides a first laser light beam in a first time interval and a third time interval. The wavelength conversion module is located on a transmission path of the first laser light beam. The wavelength conversion module includes at least one wavelength conversion region, at least one non-conversion region, a first standby region, and a second standby region, and is configured to rotate along a rotating shaft, so that the wavelength conversion region, the first standby region, the non-conversion region, and the second standby region are sequentially rotated in one direction, and the wavelength conversion region and the non-conversion region are alternately cut into the transmission path of the first laser light beam. An illumination control method and a projection apparatus are also provided.

Abstract: A wavelength conversion module is configured to receive an excitation beam. The wavelength conversion module includes a substrate and a wavelength conversion material arranged on the substrate. The substrate includes a ring-shaped light irradiation region, and the wavelength conversion material is annularly arranged on at least part of the ring-shaped light irradiation region. A first color light obtained through conversion when the excitation beam is incident to the wavelength conversion material of the ring-shaped light irradiation region in a first time sequence has a first light intensity, the first color light obtained through conversion when the excitation beam is incident to the wavelength conversion material of the ring-shaped light irradiation region in a second time sequence has a second light intensity, and the first light intensity and the second light intensity are different. In addition, a projection device is also provided.

Abstract: An optical engine module disposed on a transmission path of an illumination beam is provided. The optical engine module includes a light homogenizing element, an optical lens assembly, a first reflective element, and a light valve. The light homogenizing element is configured to enable the illumination beam to pass through. The optical lens assembly is disposed on the transmission path of the illumination beam and constituted of at least three lenses having refractive power. The first reflective element is disposed on the transmission path of the illumination beam. The light valve is disposed on the transmission path of the illumination beam and configured to convert the illumination beam into an image beam, wherein the illumination beam is sequentially transmitted from the light homogenizing element to the optical lens assembly and the first reflective element, and is reflected to the light valve by the first reflective element.

Abstract: A polarization rotation device including a rotation shaft, a driving element, a polarization element and a reflective element is provided. The polarization element is disposed on a transmission path of the at least one excitation light beam. The reflective element is disposed on a side of the polarization element. The driving element drives the polarization element to sequentially rotate with the rotation shaft as a rotation center axis. When the polarization element rotates, the excitation light beam is transmitted to the polarization element and passes through the polarization element and is again transmitted to and passes through the polarization element by the reflective element. The excitation light beam outputting from the polarization rotation device has different polarization states at different time periods. A projection device applying the polarization rotation device of the invention achieves the effect of uniform color or brightness when displaying images in a 3D display mode.

Abstract: An illumination system configured to provide an illumination beam and including an excitation light source and a wavelength conversion module is provided. The excitation light source is configured to emit an excited beam. The wavelength conversion module is located on a transmission path of the excited beam, and has an annular wavelength conversion region. 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. A proportional value range of the second part of the excited beam and the excited beam ranges between 5% and 30%. Moreover, a projection apparatus is also provided. The illumination system of the invention has a simple structure and a concise optical path layout.

Abstract: A projection device includes: an illumination system providing an illumination beam; a light valve disposed on a transmission path of the illumination beam to modulate the illumination beam into an image beam; and a projection lens disposed on a transmission path of the image beam to project the image beam out of the projection device to form a portrait image. A center of the light valve has a first offset relative to a reference plane in a long side direction of the light valve. The reference plane includes a central axis of the projection lens. The reference plane is perpendicular to the long side direction of the light valve. A center of the portrait image has a second offset relative to the reference plane in a long side direction of the portrait image. The projection device of the invention provides a portrait image with favorable display quality.

Abstract: An illumination system and a projection device are provided. The illumination system includes at least one laser light source providing at least one laser beam and a polarizing rotation module including a first axle, a first driving element, and a polarizing element. The first axle has a first revolution frequency. The polarizing element is disposed on a transmission path of the laser beam. The first driving element causes the polarizing element to rotate in a temporally sequenced manner. When the polarizing element is rotated, the laser beam is transmitted to the polarizing element at a specific frequency in a plurality of first time periods. The laser beam passing through the polarizing element has different polarizing states at different times. The specific frequency and the first revolution frequency of the first axle are not exactly divisible by each other. The invention can generate an image with uniform polarizing direction.

Abstract: A projector and an illumination system are provided. The projector includes an illumination system, a light valve, and a projection lens. The illumination system includes a light source configured to provide an illumination beam and a light processing module comprising a reflective wheel structure and a driving unit. The reflective wheel structure includes first and second reflective structures. The first and second reflective structures are located on a transmission path of the illumination beam. The driving unit is connected to the first reflective structure or the second reflective structure and is configured to drive the first and second reflective structures to rotate synchronously. The light valve is located on a transmission path of the illumination beam transmitted from the second reflective structure and configured to convert the illumination beam from the second reflective structure into an image beam.

Abstract: An optical rotating device includes a substrate having a first surface and a second surface opposite to each other, a rotating shaft connected to the substrate, a driving element connected to the rotating shaft and driving it to rotate, a wavelength conversion layer disposed on the first surface to convert a first laser beam into a converted beam, and a polarizing element disposed on the second surface. The first laser beam and at least one second laser beam are respectively transmitted to the wavelength conversion layer and the polarizing element from opposite directions. The driving element drives the substrate, the wavelength conversion layer and the polarizing element to rotate along the rotating shaft as a rotation central axis. When the polarizing element is rotated, the polarizing element makes the second laser beam have different polarization states at different times. An illumination system and a projection device are also provided.

Abstract: An optical rotating device includes a substrate having a first surface and a second surface opposite to each other, a rotating shaft connected to the substrate, a driving element connected to the rotating shaft and driving it to rotate, a wavelength conversion layer disposed on the first surface to convert a first laser beam into a converted beam, and a polarizing element disposed on the second surface. The first laser beam and at least one second laser beam are respectively transmitted to the wavelength conversion layer and the polarizing element from opposite directions. The driving element drives the substrate, the wavelength conversion layer and the polarizing element to rotate along the rotating shaft as a rotation central axis. When the polarizing element is rotated, the polarizing element makes the second laser beam have different polarization states at different times. An illumination system and a projection device are also provided.

Abstract: An illumination system includes a blue light source, an excitation light source, a first light splitting element and a wavelength conversion element. The blue light source provides a blue light beam. The excitation light source provides an excitation light beam. The first light splitting element is disposed on a transmission path of the excitation light beam. The wavelength conversion element is disposed on the transmission paths of a blue light beam and the excitation light beam and includes a columnar diffusion member and a wavelength conversion member respectively located on opposite sides of the wavelength conversion element. The blue light beam passes through the columnar diffusion member, and the excitation light beam passing through the first light splitting element is transmitted to the wavelength conversion member and converted into an excited light beam including a first red light beam and a green light beam.

Abstract: An illumination system includes a blue light source, an excitation light source, a first light splitting element and a wavelength conversion element. The blue light source provides a blue light beam. The excitation light source provides an excitation light beam. The first light splitting element and the wavelength conversion element are disposed on transmission paths of the blue light beam and the excitation light beam. The wavelength conversion element includes a diffusion region and a wavelength conversion region. In a first timing period, the excitation light beam passing through the first light splitting element is transmitted to the wavelength conversion region to be converted into an excited light beam. In a second timing period, the blue light beam passing through the diffusion region is transmitted to the first light splitting element. The excited light beam includes a first red light beam and a green light beam.

Abstract: A projection device includes an illumination system, a light valve, and a projection lens. The illumination system includes a light source, a lens array, a condenser lens, and a wavelength conversion element. The light source is for providing a light beam. The lens array and the condenser lens are disposed on a transmission path of a light beam. The condenser lens is for receiving the light beam passing through the lens array and converting the light beam into a condenser light beam. The wavelength conversion element is for receiving the condenser light beam and converting at least a portion thereof into a converted light beam. The projection device and the illumination system provided by the invention can effectively improve the conversion efficiency of the wavelength conversion element and prevent the wavelength conversion element from damage, and effectively project the converted light beam generated by the wavelength conversion element.

Abstract: An optical engine module disposed on a transmission path of an illumination beam is provided. The optical engine module includes a light homogenizing element, an optical lens assembly, a first reflective element, and a light valve. The light homogenizing element is configured to enable the illumination beam to pass through. The optical lens assembly is disposed on the transmission path of the illumination beam and constituted of at least three lenses having refractive power. The first reflective element is disposed on the transmission path of the illumination beam. The light valve is disposed on the transmission path of the illumination beam and configured to convert the illumination beam into an image beam, wherein the illumination beam is sequentially transmitted from the light homogenizing element to the optical lens assembly and the first reflective element, and is reflected to the light valve by the first reflective element.

Abstract: The disclosure relates to an illumination system, a projection device and an illumination control method. The illumination system includes a first sensor, a second sensor and a control module. The first sensor receives a part of an excitation beam and a part of at least one converted beam scattered by a wavelength conversion module, so as to generate a first photoelectric signal. The second sensor receives a part of a first set of color light and a part of a second set of color light scattered by a filter module, so as to generate a second photoelectric signal. The control module generates a synchronization signal based on relative intensity changes of the first and second photoelectric signals. The synchronization signal is to synchronize the wavelength conversion module with the filter module, and the first set of color light and the second set of color light sequentially form an illumination beam.

Abstract: An illumination system including an excitation light source, a first light splitting element, a wavelength conversion element, a second light splitting element, a third light splitting element and a fourth light splitting element is provided. The excitation light source provides a light beam. The first light splitting element allows the light beam to pass through to generate a first light beam or reflects it to generate a second light beam. The wavelength conversion element is located on a light path of the first light beam. The second light splitting element allows the first light beam to pass through to be transmitted to the wavelength conversion element to generate a third light beam and reflects the third light beam. The third light splitting element reflects the second light beam. The fourth light splitting element allows the second light beam to pass through and reflects the third light beam.

Abstract: The invention discloses a phosphor wheel, and a projector using the phosphor wheel. The projector includes an illumination system, a light valve, and a projection lens. The illumination system is used to provide an illumination beam. The light valve is disposed on a transmission path of the illumination beam and converts the illumination beam into an image beam. The projection lens is disposed on a transmission path of the image beam. The illumination system includes an excitation light source and a phosphor wheel. The excitation light source is used to provide an excitation beam to the phosphor wheel. The phosphor wheel includes a motor, a disk plate, a reflection member, and at least one phosphor layer. The motor has a shaft. The disk plate is connected to the shaft. In the invention, the phosphor wheel has better reliability and rigidity, and has the effect of enhancing heat dissipation.

Abstract: An illumination system including at least one laser light source, at least one light spot shaping element and a light uniforming element is provided. The at least one laser light source emits at least one laser beam. The light spot shaping element is disposed on a transmission path of the at least one laser beam. At least one surface of the light spot shaping element has multiple microstructures, and a shape of an orthogonal projection of each one of the microstructures on a reference plane perpendicular to an optical axis of the light spot shaping element is a rectangle. The light uniforming element is disposed on the transmission path of the laser beam, and the light uniforming element has a rectangular light entering end, wherein an aspect ratio of each microstructure of the light spot shaping element corresponds to an aspect ratio of the rectangular light entering end. A projection apparatus is also provided. The projection apparatus having the illumination system may acquire better optical efficiency.

Abstract: An illumination system and a projection apparatus are provided. The illumination system includes an excitation light source, an auxiliary light source emitting an auxiliary light beam, and a dichroic device located on a transmission path of the auxiliary light beam. The auxiliary light beam has a first polarization light beam having a first polarization state and a second polarization light beam having a second polarization state. A ratio of light intensity of the first polarization light beam to light intensity of the second polarization light beam is greater than or equal to 20. The dichroic device provides a light beam having the first polarization state and a first wavelength with transmittance of 50% and provides the light beam having the second polarization state and a second wavelength with transmittance of 50% when an angle at which the light beam enters the dichroic device is greater than a predetermined angel.

Abstract: A projecting apparatus includes an illuminating system and a first sensing module. The illuminating system includes a light source module and a filter element. The first sensing module is disposed beside the filter element, and includes a first light emitter and a first light sensor. The first light emitter emits a first sensing light. Outside the transmission path of the light beam, a first and a second filter regions of the filter element are sequentially cut into a transmission path of the first sensing light. When the first filter region is cut into the transmission path of the first sensing light, the first light sensor generates a first sensing signal, and when the second filter region is cut into the transmission path of the first sensing light, the first light sensor generates a second sensing signal, and the first sensing signal is different from the second sensing signal.