JP2011154168A5

JP2011154168A5 -

Info

Publication number: JP2011154168A5
Application number: JP2010015250A
Authority: JP
Filing date: 2010-01-27
Publication date: 2013-03-14
Anticipated expiration: 2030-01-27

Claims

An excitation light irradiation device including an excitation light source;
A fluorescent wheel provided with at least two or more different phosphor layers emitting fluorescent light in response to light emitted from the excitation light irradiation device;
A wheel motor that rotationally drives the fluorescent wheel;
A red light source device for emitting red wavelength band light;
A blue light source device for emitting blue wavelength band light;
A light source side optical system for condensing the fluorescent light emitted from the fluorescent wheel and the light emitted from the red light source device and the blue light source device on a predetermined surface;
A light source unit comprising: a light source control unit that controls the wheel motor while performing time-division control on the excitation light irradiation device, the red light source device, and the blue light source device.

The phosphor layers having two or more different properties receive emission light from the excitation light irradiation device and emit fluorescent light having different luminance, saturation, or wavelength band, respectively. Item 2. The light source unit according to Item 1.

Selecting means for selecting one projection mode from a plurality of projection modes;
The light source control unit causes the phosphor layer corresponding to the projection mode selected by the selection unit to irradiate light from the excitation light irradiation device among the plurality of phosphor layers. Or the light source unit of 2.

The fluorescent wheel has a plurality of green phosphor layers with different properties arranged in parallel in the circumferential direction on the surface irradiated with the light emitted from the excitation light irradiation device,
The light source control unit sequentially turns on the red light source device, the excitation light source, and the blue light source device, and when turning on the excitation light source, a specific green phosphor layer in the plurality of green phosphor layers is in a predetermined position. The light source unit according to any one of claims 1 to 3 , wherein the wheel motor is controlled so as to be positioned at a position.

The luminescent wheel further comprises a yellow phosphor layer,
The light source control means includes a timing at which a specific green phosphor layer in the plurality of green phosphor layers is positioned on an optical axis of light emitted from the excitation light irradiation device, and light emitted from the excitation light irradiation device. The excitation light source is turned on at the timing when the yellow phosphor layer is positioned on the optical axis, and a phosphor layer other than the specific green phosphor layer is positioned on the optical axis of light emitted from the excitation light irradiation device. The light source unit according to claim 4 , wherein control is performed to turn on the red light source device and the blue light source device at a timing when the light source device is turned on.

The light source control means performs control to turn on the red light source device or the blue light source device at a timing when the yellow phosphor layer is positioned on the optical axis of the light emitted from the excitation light irradiation device. The light source unit according to claim 5 .

The light source unit according to any one of claims 1 to 6 , wherein the light source control unit performs control to turn on the red light source device and the blue light source device at a timing at which the excitation light irradiation device is not turned on.

The fluorescent wheel has a plurality of phosphor layers having different properties in a substantially circular shape with a predetermined width arranged in parallel on the surface on the side irradiated with the light emitted from the excitation light irradiation device. the light source unit according to any one of claims 1 to 7, characterized in that it comprises a plurality of stages of circular fluorescent layer in the radial direction.

The wheel motor is movable in the radial direction of the fluorescent wheel,
The light source control means controls the wheel motor to operate such that a predetermined stage of the plurality of annular phosphor layers is positioned on an optical axis of light emitted from the excitation light irradiation device. The light source unit according to claim 8 , wherein:

A light source unit according to any one of claims 1 to 9 ,
A display element for generating an image by modulating light from the light source unit;
A light guide optical system for guiding light from the light source unit to the display element;
A projection-side optical system that projects an image emitted from the display element onto a screen,
A projector comprising: a light source control means for controlling the light source unit; and a projector control means as a display element control means for controlling the display element.

The display element control unit generates a predetermined image by controlling the display element by matching red, green, blue, and yellow wavelength band light emitted from the light source unit in the order of the emitted wavelength band light. The projector according to claim 10 .