Laser light source and laser projection device

Abstract

The invention discloses a laser light source and a laser projection device. The laser light source provided by an embodiment of the present invention comprises lasers, a light collection device, a rotation wheel, and a light uniformizing component; the lasers can emit light of at least two colors; excitation light and laser light can be transmitted through the light collection device and arrive atthe rotation wheel; the light collection device reflects laser light reflected by the rotation wheel and fluorescent light; the rotation wheel includes a substrate; a diffuse reflection portion and afluorescence portion are arranged on the substrate; the diffuse reflection portion reflects the laser light transmitted by the light collection device to the light collection device; excited by the transmitted excitation light, the fluorescence portion generates fluorescent light; the fluorescence portion is coated with at least one kind of fluorescent powder with same colors as the lasers; whenbeing excited by the excitation light, the at least one kind of fluorescent powder turns on the lasers of which the colors are corresponding to the colors of the fluorescent powder; and the light uniformizing component receives the laser light and the fluorescent light reflected by the light collection device and uniformizes the received laser light and the fluorescent light. Therefore, the rotation wheel realizes the mixed output of the laser light and fluorescent light; and the diffuse reflection portion can diffusely reflect a light spot formed by laser light entering the diffuse reflectionportion, and therefore, speckle elimination can be facilitated.

Description

technical field [0001] The invention relates to the field of laser display, in particular to a laser light source and a laser projection device. Background technique [0002] Laser is a light source with high brightness, strong directivity and monochromatic coherent beam. As an excellent coherent light source, laser light source has the advantages of good monochromaticity, strong directivity and high luminous flux. Projection display technology. [0003] The high coherence of the laser also brings about the speckle effect in the laser projection display. The speckle is the light scattered by the coherent light source when illuminating the rough object. Because its wavelength is the same and the phase is constant, it will cause interference in space. , some parts of the space have interference constructive, and some parts have interference cancellation. The final result is that granular light and dark spots appear on the screen. These unfocused spots are flickering to the hu...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a laser light source and laser projection equipment, which are used to alleviate the problems of laser speckle and degradation of projected image quality

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