Light source system and display device

A display device, comprising a light source system, wherein the light source system comprises an exciting light source, a collection system, a wavelength conversion device, a relay system, an optical-mechanical system, a detection device, and a distance adjustment device, wherein:

• the exciting light source is configured to emit exciting light;
• the collection system is disposed between the exciting light source and the wavelength conversion device;
• and the exciting light irradiates the wavelength conversion device after being collected by the collection system;
• the wavelength conversion device comprises a conversion region and a reflective region, wherein the wavelength conversion device periodically moves in such a manner that the conversion region and the reflective region are periodically located on an optical path of the exciting light in different time divisions, wherein the conversion region is configured to convert the exciting light into excited light and emit the exited light, and the reflective region is configured to emit the exciting light by reflecting the exciting light, and wherein the excited light and the exciting light that are emitted from the wavelength conversion device are located on a same side of the wavelength conversion device but have optical axes that do not coincide;
• the collection system is further configured to collect the excited light and the exciting light that are emitted from the wavelength conversion device;
• the relay system is configured to guide the collected excited light and exciting light to the optical-mechanical system in such a manner that the excited light and the exciting light enter the optical-mechanical system with their optical axes being substantially coincident within a preset error range;
• the optical-mechanical system is configured to homogenize and provide the excited light and the exciting light to a spatial light modulator for modulating image light;
• as a distance between the collection system and the wavelength conversion device changes, brightness and color coordinates of light emitted from the optical-mechanical system change;
• the detection device is configured to detect information on the brightness and/or the color coordinates of the light emitted from the optical-mechanical system;
• and
• the distance adjustment device is configured to adjust the distance between the collection system and the wavelength conversion device in accordance with the information detected by the detection device in such a manner that the brightness and/or the color coordinates of the light emitted from the optical-mechanical system satisfy a preset condition.