MULTICOLOR ILLUMINATION DEVICE USING MOVING PLATE WITH WAVELENGTH CONVERSION MATERIALS
First Claim
1. An illumination device for providing multicolor light, comprising:
- a light source for generating an excitation light;
a plate including two or more segments, wherein one or more of the segments each contains a wavelength conversion material capable of absorbing the excitation light and emitting light having wavelengths different from that of the excitation light,wherein a first segment contains a first wavelength conversion material, and a second segment either contains a different wavelength conversion material or contains no wavelength conversion material,wherein a part of the plate is disposed on an optical path of the excitation light, and wherein the plate and the excitation light are moveable relative to each other so that different segments are exposed to the excitation light at different times; and
a dichroic element disposed between the wavelength conversion material and the light source, the dichroic element transmitting the excitation light and reflecting light emitted by the wavelength conversion materials.
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Accused Products
Abstract
A multicolor illumination device using an excitation light source and a multi-segmented moving plate with wavelength conversion materials (e.g. phosphors) is disclosed. The exciting light source is a light emitting diode or a laser diode emitting in the UV and/or blue region. The wavelength conversion materials absorb the excitation light and emit longer wavelength light. Each segment of the moving plate contains a different wavelength conversion material or no wavelength conversion material. The plate is supported to move so that different segments are exposed to the excitation light at different times. The plate may be a wheel or rectangular in shape and rotates or oscillates linearly. When the plate moves, light of different colors is generated sequentially in time by the different wavelength conversion materials in different segments of the plate. The multicolor illumination device may be used in a projector system having a microdisplay imager for image display.
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Citations
34 Claims
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1. An illumination device for providing multicolor light, comprising:
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a light source for generating an excitation light; a plate including two or more segments, wherein one or more of the segments each contains a wavelength conversion material capable of absorbing the excitation light and emitting light having wavelengths different from that of the excitation light, wherein a first segment contains a first wavelength conversion material, and a second segment either contains a different wavelength conversion material or contains no wavelength conversion material, wherein a part of the plate is disposed on an optical path of the excitation light, and wherein the plate and the excitation light are moveable relative to each other so that different segments are exposed to the excitation light at different times; and a dichroic element disposed between the wavelength conversion material and the light source, the dichroic element transmitting the excitation light and reflecting light emitted by the wavelength conversion materials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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15. (canceled)
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28. A method for generating multicolor light, comprising:
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generating an excitation light using a light source; directing the excitation light onto a segment of a plate, the plate having two or more segments, wherein one or more of the segments each contains a wavelength conversion material capable of absorbing the excitation light and emitting light having wavelengths different from that of the excitation light, wherein a first segment contains a first wavelength conversion material, and a second segment either contains a different wavelength conversion material or contains no wavelength conversion material, the plate further including a dichroic filter disposed between the wavelength conversion material and the light source, the dichroic filter transmitting the excitation light and reflecting light emitted by the wavelength conversion materials; and moving the plate and the excitation light relative to each other so that different segments are exposed to the excitation light at different times to generate emitted light of different colors. - View Dependent Claims (29, 30, 31)
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32. A method for generating multicolor light, comprising:
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generating an excitation light using a light source; directing the excitation light onto a segment of a plate, the plate having two or more segments, wherein one or more of the segments each contains a wavelength conversion material capable of absorbing the excitation light and emitting light having wavelengths different from that of the excitation light, wherein a first segment contains a first wavelength conversion material, and a second segment either contains a different wavelength conversion material or contains no wavelength conversion material; moving the plate and the excitation light relative to each other so that different segments are exposed to the excitation light at different times to generate emitted light of different colors; projecting the light of different colors emitted from the wavelength conversion materials toward a display screen using a microdisplay imager; modulating the light source; controlling the relative movement of the plate and the light source, the microdisplay imager, and the modulation of the light source in a synchronized manner to generate an image on the display screen.
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33. A method for generating a colored light, comprising:
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generating an excitation light using a light source; directing the excitation light onto a segment of a plate, the plate having two or more segments, wherein one or more of the segments each contains a wavelength conversion material capable of absorbing the excitation light and emitting light having wavelengths different from that of the excitation light, wherein a first segment contains a first wavelength conversion material, and a second segment either contains a different wavelength conversion material or contains no wavelength conversion material; moving the plate and the excitation light relative to each other so that different segments are exposed to the excitation light at different times to generate emitted light of different colors; modulating the light source; and controlling the relative movement of the plate and the excitation light and the modulation of the light source in a synchronized manner to generate a colored light.
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34. An illumination device for providing multicolor light, comprising:
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one or more light sources each for generating an excitation light; one or more optic fibers for transmitting the excitation light generated by the one or more light sources; a plate including two or more segments, wherein one or more of the segments each contains a wavelength conversion material capable of absorbing the excitation light and emitting light having wavelengths different from that of the excitation light, wherein a first segment contains a first wavelength conversion material, and a second segment either contains a different wavelength conversion material or contains no wavelength conversion material, wherein a part of the plate is disposed on an optical path of the excitation light outputted by the optical fibers, and wherein the plate and the optical fibers are moveable relative to each other so that different segments are exposed to the excitation light at different times.
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Specification