Projection device and use method thereof

A projection device, comprising:

• an illumination light source, configured to provide an illumination beam;
• an electrochromic module, disposed on a transmission path of the illumination beam, wherein the electrochromic module comprises at least one electrochromic element, and is configured to maintain or filter the illumination beam to a color beam;
• at least one light valve, disposed on the transmission path of the color beam transmitted by the electrochromic module, and is configured to convert the color beam into an image beam;
• a projection lens, disposed on a transmission path of the image beam, and is configured to project the image beam out of the projection device;
• and
• a light splitting/combining module, disposed between the illumination light source and the electrochromic module, and located on the transmission path of the illumination beam, wherein the at least one light valve and the at least one electrochromic element are a plurality of light valves and a plurality of electrochromic elements, the plurality of electrochromic elements respectively correspond to the plurality of light valves, and the light splitting/combining module is configured to respectively guide the illumination beam with different wavelengths to the plurality of different electrochromic elements.

A use method of a projection device, wherein the projection device comprises an illumination light source, an electrochromic module, a control element, at least one light valve, and a projection lens, the electrochromic module comprises at least one electrochromic element, and is configured to sequentially maintain or filter the illumination beam to provide a plurality of color beams, wherein the electrochromic module comprises a first electrochromic element and a second electrochromic element, the use method of the projection device comprising:

• sequentially providing an illumination beam with different wavelengths respectively to the electrochromic module by the illumination light source;
• receiving a first signal or a second signal by the control element;
• driving the electrochromic module according to the first signal or stopping driving the electrochromic module according to the second signal by the control element, wherein the control element adjusts a voltage of at least one of the first electrochromic element and the second electrochromic element, and a color portion of the illumination beam allowed by the first electrochromic element to pass through is different from a color portion of the illumination beam allowed by the second electrochromic element to pass through;
• and
• each of the color beams that has passed through the electrochromic module transmitting to the at least one light valve to be converted into an image beam, and projecting the image beam from the projection lens.

A use method of the projection device, wherein the projection device comprises an illumination light source, an electrochromic module, a control element, a light splitting/combining module, at least one light valve, and a projection lens, the illumination light source is configured to provide an illumination beam, the light splitting/combining module is disposed on a transmission path of the illumination beam, the at least one light valve and the at least one electrochromic element are a plurality of light valves and a plurality of electrochromic elements, and the plurality of electrochromic elements respectively correspond to the plurality of light valves, the use method of the projection device comprising:

• providing the illumination beam to the electrochromic module by the illumination light source;
• receiving a first signal or a second signal by the control element;
• driving the electrochromic module according to the first signal or stopping driving the electrochromic module according to the second signal by the control element;
• guiding the illumination beam with different wavelengths to the plurality of different electrochromic elements by the light splitting/combining module;
• providing a plurality of color beams respectively generated from the plurality of different electrochromic elements to the plurality of light valves;
• converting each of the plurality of color beams into an image beam;
• and
• projecting the image beam from the projection lens.