Projection lighting optical path based on semiconductor laser array

Abstract

The invention discloses a projection lighting optical path based on a semiconductor laser array, which comprises a semiconductor green light laser array module, a semiconductor red light laser array module, a semiconductor blue light laser array module, a light mixing module and a phase rectifying apparatus; the semiconductor green light laser array module, the semiconductor red light laser array module and the semiconductor blue light laser array module are connected with the light mixing module by the optical path; the semiconductor green light laser array module, the semiconductor red light laser array module and the semiconductor blue light laser array module provide light for the light mixing module; the phase rectifying apparatus is arranged on the output optical path of the light mixing module; on one hand, the phase rectifying apparatus is used for rectifying the mixed light of the light mixing module, and on the other hand, and the phase rectifying apparatus is used for further restraining the light speckles.

Description

technical field [0001] The invention relates to the field of laser projection display, in particular to a projection illumination optical path which adopts a semiconductor laser array as a light source and can improve the quality of projected images. Background technique [0002] Traditional projectors using high-pressure mercury lamps as light sources have short light source life, small color gamut and low saturation of projected images, which gradually cannot meet people's needs for color. Laser display has attracted more and more attention due to its advantages such as long light source life, extreme color performance, high-definition projected image, and high contrast. [0003] Compared with other solid-state lasers, semiconductor lasers are smaller in size and have higher photoelectric efficiency, making them ideal light sources for laser displays. At present, red and blue laser diodes are very mature, and the power of a single tube has reached the watt level; green la...

AI Technical Summary

Problems solved by technology

[0004] However, the high coherence of the laser makes the laser projection display have the advantage of wide color gamut, but also leads to a disadvantage of the laser projection display: speckle phenomenon

In this system, multiple optical fibers are used to couple the array laser together. Although the speckle can be suppressed to a certain extent, to achieve a better effect, the number of subs is required to be large, which will result in an increase in volume and light energy utilization. reduction in rate

These factors limit the large-scale application of laser display

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