Abstract: A projection system and a projection method are provided. The projection system includes a projection device, a streaming device, and a control device. The projection device includes a first image input port and a second image input port. The streaming device is electrically connected to the first image input port of the projection device and is coupled to the projection device in a detachable manner. The control device is communicatively connected to the streaming device. The control device transmits a first command signal to the streaming device, so that the projection device projects image data from the streaming device. The projection method may be executed by the projection system. The projection system and the projection method of the disclosure provide a user with more convenient operation environment and operation interface.

Abstract: A projector and a projection method that effectively protect a to-be-protected object existing in a sensing area are provided. The projector includes a first sensor, a second sensor, an optical engine and a processor. The optical engine includes a light source. The first sensor receives a first sensed signal, generates a first signal corresponding to the first sensed signal and transmits the first signal to the processor. The second sensor receives a second sensed signal different from the first sensed signal, generates a second signal corresponding to the second sensed signal and transmits the second signal to the processor. The processor determines whether the first signal and the second signal fall into their respective pre-determined ranges. The processor transmits a light adjusting signal to control a light source.

Abstract: A projection device and a controlling method of the projection device are provided. The projection device includes a light emitting module, a driver, a light valve, a projection lens and a processor. The light emitting module generates a light beam according to a driving current respectively. The driver generates the driving current and transmit the driving current to the light emitting module according to an operating signal. The light valve receives the light beam to form an image light beam. The projection lens projects the image light beam. The processor provides the operating signal with a default period to the driver and provides an operation of the light valve. According to the operating signal or the operation of the light valve, the driver generates the driving current lower than a default current during a first time interval in the default period.

Abstract: A projection system and a projection method are provided. The projection system includes a projection device, a streaming device, and a control device. The projection device includes a first image input port and a second image input port. The streaming device is electrically connected to the first image input port of the projection device and is coupled to the projection device in a detachable manner. The control device is communicatively connected to the streaming device. The control device transmits a first command signal to the streaming device, so that the projection device projects image data from the streaming device. The projection method may be executed by the projection system. The projection system and the projection method of the disclosure provide a user with more convenient operation environment and operation interface.

Abstract: A projection device and a controlling method of the projection device are provided. The projection device includes a light emitting module, a driver, a light valve, a projection lens and a processor. The light emitting module generates a light beam according to a driving current respectively. The driver generates the driving current and transmit the driving current to the light emitting module according to an operating signal. The light valve receives the light beam to form an image light beam. The projection lens projects the image light beam. The processor provides the operating signal with a default period to the driver and provides an operating of the light valve. According to the operating signal or the operating of the light valve, the driver generates the driving current lower than a default current during a first time interval in the default period.

Abstract: An illumination system including a first excitation light source, a wavelength conversion wheel, and a filter wheel is provided. The first excitation light source is configured to emit a first excitation beam. The wavelength conversion wheel includes a wavelength conversion region and a first optical region. The wavelength conversion region and the first optical region alternately enter a transmission path of the first excitation beam. The first excitation beam is converted into a conversion beam by the wavelength conversion region when the wavelength conversion region enters the transmission path of the first excitation beam. The filter wheel includes a first region, a second region, and a blocking region. An angle covered by the second region in a circumferential direction is smaller than an angle covered by the first optical region. A projection apparatus is also provided.

Abstract: A projection lens includes a lens barrel, at least one lens, a focus adjusting ring, a focus adjusting gear, and a driving module. The at least one lens is disposed in the lens barrel. The focus adjusting ring is disposed on the lens barrel. The focus adjusting gear is fixed on the focus adjusting ring. The driving module is connected with the focus adjusting gear. The driving module includes a motor, a motor gear, a limiter, and an elastic element. The motor has a rotating shaft. The motor gear is penetrated through by the rotating shaft and engages with the focus adjusting gear. The limiter is fixed on the rotating shaft. The elastic element is disposed between the limiter and the motor gear, wherein the limiter applies a normal force to the motor gear through the elastic element.

Abstract: A projector and a projection method that effectively protect a to-be-protected object existing in a sensing area are provided. The projector includes a first sensor, a second sensor, an optical engine and a processor. The optical engine includes a light source. The first sensor receives a first sensed signal, generates a first signal corresponding to the first sensed signal and transmits the first signal to the processor. The second sensor receives a second sensed signal different from the first sensed signal, generates a second signal corresponding to the second sensed signal and transmits the second signal to the processor. The processor determines whether the first signal and the second signal fall into their respective pre-determined ranges. The processor transmits a light adjusting signal to control a light source.

Abstract: A projection device and a light source module thereof and a method for synchronizing a wavelength conversion wheel and a filter wheel are provided. A rotation state of the wavelength conversion wheel and a rotation state of the filter wheel are detected to generate a first position signal and a second position signal, respectively. A control unit is used to control one of the wavelength conversion wheel and the filter wheel to rotate. A micro control unit is used to control the other one of the wavelength conversion wheel and the filter wheel to rotate according to the first position signal and the second position signal, so that the wavelength conversion wheel and the filter wheel rotate synchronously. The disclosure enables the wavelength conversion wheel and the filter wheel to synchronize in the circumstances where the control unit only supports controlling of one wavelength conversion wheel or filter wheel.

Abstract: An illumination system including a first excitation light source, a wavelength conversion wheel, and a filter wheel is provided. The first excitation light source is configured to emit a first excitation beam. The wavelength conversion wheel includes a wavelength conversion region and a first optical region. The wavelength conversion region and the first optical region alternately enter a transmission path of the first excitation beam. The first excitation beam is converted into a conversion beam by the wavelength conversion region when the wavelength conversion region enters the transmission path of the first excitation beam. The filter wheel includes a first region, a second region, and a blocking region. An angle covered by the second region in a circumferential direction is smaller than an angle covered by the first optical region. A projection apparatus is also provided.

Abstract: A projection lens includes a lens barrel, at least one lens, a focus adjusting ring, a focus adjusting gear, and a driving module. The at least one lens is disposed in the lens barrel. The focus adjusting ring is disposed on the lens barrel. The focus adjusting gear is fixed on the focus adjusting ring. The driving module is connected with the focus adjusting gear. The driving module includes a motor, a motor gear, a limiter, and an elastic element. The motor has a rotating shaft. The motor gear is penetrated through by the rotating shaft and engages with the focus adjusting gear. The limiter is fixed on the rotating shaft. The elastic element is disposed between the limiter and the motor gear, wherein the limiter applies a normal force to the motor gear through the elastic element.