Wavelength conversion device, illumination device, and projector
A wavelength conversion device includes a wavelength conversion element, and a cooling device adapted to cool the wavelength conversion element. The cooling device has a first blower device, and the wavelength conversion element is disposed on an intake side of the first blower device.
1. A wavelength conversion device comprising:
a wavelength conversion element; and
a cooling device adapted to cool the wavelength conversion element, wherein:
the cooling device has a first blower device,
the wavelength conversion element is disposed on an intake side of the first blower device,
the wavelength conversion element is disposed in a negative-pressure region caused by driving the first blower device, and
the wavelength conversion element includes:
a substrate rotatable around a rotational axis, and
a phosphor layer disposed on the substrate.
2. The wavelength conversion device according to claim 1 , wherein
the cooling device further includes
a second blower device adapted to feed a cooling gas to the wavelength conversion element, and
a first duct in which the wavelength conversion element, the first blower device, and the second blower device are disposed, and
a flow path resistance between an intake surface of the first blower device and the wavelength conversion element is smaller than a flow path resistance between an exhaust surface of the second blower device and the wavelength conversion element.
3. The wavelength conversion device according to claim 1 , wherein
the cooling device further includes a housing adapted to house the wavelength conversion element and the first blower device, and having a circulation flow path through which a cooling gas having been discharged by the first blower device is supplied to the wavelength conversion element, and
a flow path resistance between an intake surface of the first blower device and the wavelength conversion element is smaller than a flow path resistance between an exhaust surface of the first blower device and the wavelength conversion element.
4. The wavelength conversion device according to claim 3 , wherein
the wavelength conversion element and the first blower device are roughly encapsulated by the housing.
5. The wavelength conversion device according to claim 1 , wherein
the first blower device is located in a direction perpendicular to the rotational axis viewed from the substrate.
6. The wavelength conversion device according to claim 1 , wherein
the cooling device further includes a second duct disposed in a flow path between the wavelength conversion element and the first blower device, and
the second duct has a suction part extending in a direction crossing the rotational axis.
7. An illumination device comprising:
the wavelength conversion device according to claim 1 ; and
a light emitting element adapted to emit excitation light entering the wavelength conversion element.
8. An illumination device comprising:
the wavelength conversion device according to claim 2 ; and
a light emitting element adapted to emit excitation light entering the wavelength conversion element.
9. An illumination device comprising:
the wavelength conversion device according to claim 3 ; and
a light emitting element adapted to emit excitation light entering the wavelength conversion element.
10. An illumination device comprising:
the wavelength conversion device according to claim 4 ; and
a light emitting element adapted to emit excitation light entering the wavelength conversion element.
11. A projector comprising:
the illumination device according to claim 7 ;
a light modulation device adapted to modulate light emitted from the illumination device in accordance with an image signal;
a projection optical device adapted to project the light modulated by the light modulation device; and
an exterior housing adapted to house the illumination device, the light modulation device, and the projection optical device.
12. A projector comprising:
the illumination device according to claim 8 ;
a light modulation device adapted to modulate light emitted from the illumination device in accordance with an image signal;
a projection optical device adapted to project the light modulated by the light modulation device; and
an exterior housing adapted to house the illumination device, the light modulation device, and the projection optical device.
13. A projector comprising:
the illumination device according to claim 9 ;
a light modulation device adapted to modulate light emitted from the illumination device in accordance with an image signal;
a projection optical device adapted to project the light modulated by the light modulation device; and
an exterior housing adapted to house the illumination device, the light modulation device, and the projection optical device.
14. A projector comprising:
the illumination device according to claim 10 ;
a light modulation device adapted to modulate light emitted from the illumination device in accordance with an image signal;
a projection optical device adapted to project the light modulated by the light modulation device; and
an exterior housing adapted to house the illumination device, the light modulation device, and the projection optical device.
15. The wavelength conversion device according to claim 1 , wherein the wavelength conversion element is spaced from the first blower device.