Laser light source and projection display device
First Claim
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1. A laser light source, comprising:
- a laser device configured to emit a laser light;
a first diffusion element configured to be fixedly arranged;
a second diffusion element configured to rotate around an axis; and
a fluorescence wheel configured to emit a fluorescent light when excited by the laser light, wherein, before reaching the fluorescence wheel, the laser light emitted by the laser device transmits through the first diffusion element;
wherein, as the second diffusion element is controlled to rotate around its axis, the laser light from the first diffusion element and the fluorescent light from the fluorescence wheel both transmit through the second diffusion element; and
wherein the second diffusion element comprises a diffusion part and a transparent part, the diffusion part is coated with diffusers, and the transparent part is made of materials with high transmittance.
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Abstract
A laser light source is disclosed that includes a laser device, a first diffusion element, a fluorescence wheel, and a second diffusion element. The fluorescence wheel emits a fluorescent light when excited by the laser light, and before reaching the fluorescence wheel, the laser light emitted by the laser device is transmitted through the first diffusion element that is fixedly arranged. As the second diffusion plate rotates about its axis, the laser light from the first diffusion element and the fluorescent light from the fluorescence wheel transmit through the second diffusion plate.
15 Citations
18 Claims
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1. A laser light source, comprising:
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a laser device configured to emit a laser light; a first diffusion element configured to be fixedly arranged; a second diffusion element configured to rotate around an axis; and a fluorescence wheel configured to emit a fluorescent light when excited by the laser light, wherein, before reaching the fluorescence wheel, the laser light emitted by the laser device transmits through the first diffusion element; wherein, as the second diffusion element is controlled to rotate around its axis, the laser light from the first diffusion element and the fluorescent light from the fluorescence wheel both transmit through the second diffusion element; and wherein the second diffusion element comprises a diffusion part and a transparent part, the diffusion part is coated with diffusers, and the transparent part is made of materials with high transmittance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A projection display device, comprising:
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a projection screen; a light machine; a lens; and a laser light source configured to provide illumination for the light machine, and images are projected to the projection screen by the lens for displaying, and wherein the laser light source comprises; a laser device configured to emit a laser light; a first diffusion element configured to be fixedly arranged; a second diffusion element configured to rotate around an axis; and a fluorescence wheel configured to emit a fluorescent light when excited by the laser light, wherein, before reaching the fluorescence wheel, the laser light emitted by the laser device transmits through the first diffusion element; wherein, as the second diffusion element is controlled to rotate around its axis, the laser light from the first diffusion element and the fluorescent light from the fluorescence wheel both transmit to the second diffusion element; and wherein the second diffusion element comprises a diffusion part and a transparent part, the diffusion part is coated with diffusers, and the transparent part is made of materials with high transmittance.
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Specification