Laser projection system

Abstract

The invention discloses a laser projection system. The laser projection system comprises a semiconductor laser diode, a laser light source module and an optical engine module, wherein the semiconductor laser diode is used as a light emitting source; the laser light source module is provided with a plurality of optical elements and a convergent lens, and is used for converging and reflecting the laser beams sent by the semiconductor laser diode so as to pass through the convergent lens; and the optical engine module is arranged at the adjacent side of the laser light source module and is used for reflecting the laser beam which passes through the laser light source module so as to ensure that the beam irradiates on a projection lens. According to the laser projection system, the characteristic that the laser is polarized light is utilized, and a technology of combining PBS light splitting and polarized light conversion is adopted, so that the blue laser and red / green fluorescent light are in a same light path, the volume of a laser projector optical system is greatly decreased and the optical consistency of a laser projector is improved.

Description

technical field [0001] The invention relates to the technical field of laser projection, in particular to a laser projection system. Background technique [0002] Projectors that use laser light as the light source have become the trend of future projectors. There are basically two light source solutions for laser projectors. The first one uses RGB three-color lasers directly as the light source. This solution can achieve very high brightness. (Tens of thousands of lumens), but with the current technology, the volume will be very large, so it can only be used as a fixed installation for special functional occasions. The second is to use fluorescent color wheel and laser as the light source of the projector, but due to the lack of blue phosphor powder in the market, the blue laser is used to excite the phosphor powder to emit RG light, and the fluorescence is used as the RG light source of the projector, B light The laser is used as the light source, and the laser uses a sem...

AI Technical Summary

Problems solved by technology

[0006] After the RG light and the B light pass through the reflective fluorescent color wheel 5, the optical paths are different, resulting in a larger volume, and because they are two separate optical paths, the two paths of light enter the uniform rod 13 due to the tolerance of the mechanism. , the position of the optical path is different each time, resulting in poor color temperature consistency of the product. This is also the bottleneck of large volume and poor color temperature consistency encountered in the design and production of laser projectors.

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