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US 11,442,347 B2Granted
Light source device having rotating wheel and image projection apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorTomohiro Nakamura
Life of this patent
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Abstract
A light source device includes a light source unit and a rotating wheel. The light source unit is configured to emit first blue light and second blue light. The rotating wheel includes a diffuser layer configured to diffuse and transmit the first blue light, and a phosphor layer configured to convert at least a part of the second blue light into yellow light.
Claims19
A light source device comprising:
- a light source unit configured to emit first blue light and second blue light;
- and
- a rotating wheel including a diffusion element provided in an annular shape and configured to diffuse and transmit the first blue light, and a wavelength conversion element provided in an annular shape and configured to convert at least a part of the second blue light into yellow light.
An image projection apparatus comprising:
- a light source device;
- a light modulation element;
- and
- a lens holding unit configured to hold a projection lens configured to guide light from the light modulation element to a projection target surface,
- wherein the light source device comprising:
- a light source unit configured to emit first blue light and second blue light;
- and
- a rotating wheel including a diffusion element provided in an annular shape and configured to diffuse and transmit the first blue light, and a wavelength conversion element provided in an annular shape and configured to convert at least a part of the second blue light into yellow light.
5 more elements
Dependencies are inferred from the claim text.