Abstract: A filter module and a projection apparatus are provided. The filter module includes a filter layer and a diffusion layer. The filter layer includes a first filter region and a second filter region, which respectively allow light having a first waveband and light having a second waveband to pass through. The diffusion layer is disposed on a side of the filter module opposite to the filter layer and includes a first diffusion portion with a first haze value and a second diffusion portion with a second haze value. The first diffusion portion is disposed corresponding to the first filter region and allows the light having the first waveband to pass through. The second diffusion portion is disposed corresponding to the second filter region and allows the light having the second waveband to pass through. The first haze value is different from the second haze value.

Abstract: The disclosure relates to a projection device and a color gamut switching method thereof. The projection device includes a light source, a wavelength conversion element, an optical engine module, a projection lens module, and a filter element. The light source is configured to emit a first light beam. The wavelength conversion element is disposed on a transmission path of the first light beam, and the wavelength conversion element is configured to convert the first light beam into a second light beam. The optical engine module is disposed on a transmission path of the second light beam from the wavelength conversion element. The optical engine module is configured to convert the second light beam to form an image beam. The projection lens module is disposed on a transmission path of the image beam from the optical engine module. The filter element is removably disposed on the transmission path of the second light beam or the image beam.

Abstract: A filter module and a projection apparatus are provided. The filter module includes a filter layer and a diffusion layer. The filter layer includes a first filter region and a second filter region, which respectively allow light having a first waveband and light having a second waveband to pass through. The diffusion layer is disposed on a side of the filter module opposite to the filter layer and includes a first diffusion portion with a first haze value and a second diffusion portion with a second haze value. The first diffusion portion is disposed corresponding to the first filter region and allows the light having the first waveband to pass through. The second diffusion portion is disposed corresponding to the second filter region and allows the light having the second waveband to pass through. The first haze value is different from the second haze value.

Abstract: The disclosure relates to a projection device and a color gamut switching method thereof. The projection device includes a light source, a wavelength conversion element, an optical engine module, a projection lens module, and a filter element. The light source is configured to emit a first light beam. The wavelength conversion element is disposed on a transmission path of the first light beam, and the wavelength conversion element is configured to convert the first light beam into a second light beam. The optical engine module is disposed on a transmission path of the second light beam from the wavelength conversion element. The optical engine module is configured to convert the second light beam to form an image beam. The projection lens module is disposed on a transmission path of the image beam from the optical engine module. The filter element is removably disposed on the transmission path of the second light beam or the image beam.