Light source unit and projector
AssigneeCasio Computer Co., Ltd.
InventorTakeshi Miyazaki
Life of this patent
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Abstract
A light source according to the present invention includes an excitation light source configured to emit excitation light, and a luminescent wheel including a base material, a fluorescent light emitting zone formed on one surface of the base material and configured to emit fluorescent light having a wavelength in a wavelength range which differs from that of the excitation light and a reflection zone disposed so as to be aligned with the fluorescent light emitting zone on the one side surface of the base material and configured to reflect the excitation light, and a shining position of the excitation light on the fluorescent light emitting zone and a shining position of the excitation light on the reflection zone differ from each other in relation to a radial direction of the luminescent wheel.
Claims20
A light source unit comprising:
- an excitation light source configured to emit excitation light;
- and
- a luminescent wheel comprising a base material, a fluorescent light emitting zone formed on one surface of the base material and configured to emit fluorescent light having a wavelength in a wavelength range which differs from that of the excitation light and a reflection zone disposed so as to be aligned with the fluorescent light emitting zone on the one side surface of the base material and configured to reflect the excitation light,
- wherein a shining position of the excitation light on the fluorescent light emitting zone and a shining position of the excitation light on the reflection zone differ from each other in relation to a radial direction of the luminescent wheel.
A projector comprising:
- a light source unit comprising an excitation light source configured to emit excitation light, and a luminescent wheel comprising a base material, a fluorescent light emitting zone formed on one surface of the base material and configured to emit fluorescent light having a wavelength in a wavelength range which differs from that of the excitation light and a reflection zone disposed so as to be aligned with the fluorescent light emitting zone on the one surface of the base material and configured to reflect the excitation light, wherein a shining position of the excitation light on the fluorescent light emitting zone and a shining position of the excitation light on the reflection zone differ from each other in relation to a radial direction of the luminescent wheel;
- a display device onto which light source light from the light source unit is shone to form image light;
- a projection optical system configured to project the image light emitted from the display device onto a screen;
- and
- a projector control unit configured to control the display device and the light source unit.
A projector comprising:
- a light source unit comprising an excitation light source configured to emit excitation light, and a luminescent wheel comprising a base material, a fluorescent light emitting zone formed on one surface of the base material and configured to emit fluorescent light having a wavelength in a wavelength range which differs from that of the excitation light and a reflection zone disposed so as to be aligned with the fluorescent light emitting zone on the one surface of the base material and configured to reflect the excitation light, wherein a shining position of the excitation light on the fluorescent light emitting zone and a shining position of the excitation light on the reflection zone differ from each other in relation to a radial direction of the luminescent wheel, and wherein a height from the one surface of the base material to a surface of the fluorescent light emitting zone differs from a height from the one surface of the base material to a surface of the reflection zone;
- a display device onto which light source light from the light source unit is shone to form image light;
- a projection optical system configured to project the image light emitted from the display device onto a screen;
- and
- a projector control unit configured to control the display device and the light source unit.
Dependencies are inferred from the claim text.