Wavelength conversion device, illumination device, and projector
AssigneeSeiko Epson Corporation
InventorsKaname Nagatani, Kazuya Usuda
Life of this patent
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Abstract
A wavelength conversion device, an illumination device, and a projector that can efficiently cool a phosphor. A wavelength conversion device includes a substrate including a phosphor layer in which a phosphor is included, a rotating device configured to rotate the substrate, a circulating device that circulates a cooling gas to the substrate, and a housing configured to house the substrate and the circulating device. The housing includes a partition wall configured to separate a first space in which the cooling gas is circulated to the substrate by the circulating device and a second space in which the cooling gas radially delivered from the substrate according to the rotation of the substrate circulates.
Claims10
A wavelength conversion device comprising:
- a substrate including a phosphor layer in which a phosphor is included;
- a rotating device configured to rotate the substrate about a rotation axis;
- a circulating device that circulates a cooling gas to the substrate;
- and
- a housing configured to house the substrate and the circulating device, wherein
- the housing includes a partition wall configured to separate a first space in which the cooling gas is circulated to the substrate by the circulating device and a second space in which the substrate is disposed,
- the partition wall includes an opening section for circulating the cooling gas to the substrate,
- the rotation axis extends through the opening section of the partition wall, and
- the cooling gas is radially delivered to the second space from the first space by the rotation of the substrate.
A wavelength conversion device comprising:
- a substrate configured to rotate around a rotation axis extending along a first direction;
- a plurality of fins located on a first surface, which is one surface on the substrate, and extending from a center side toward an outer side of the substrate;
- a phosphor layer located in either one of the first surface and a second surface on an opposite side of the first surface;
- a rotating device configured to rotate the substrate;
- a delivering device configured to deliver the cooling gas to the first surface;
- and
- a housing in which the substrate is disposed on an inner side, wherein
- the housing includes:
- a first side surface section opposed to the second surface;
- and
- a second side surface section that crosses the first side surface section and includes an arcuate section extending along a circumferential direction during the rotation of the substrate disposed on the inner side when viewed along the first direction,
- a radius from a center of an arc of the arcuate section is larger than a radius of the substrate,
- the center of the arc of the arcuate section is located spaced apart from a rotation axis of the substrate, and
- the substrate is rotated counterclockwise by the rotating device when viewed from the first direction side.
Dependencies are inferred from the claim text.