A monochrome laser light source, a color laser light source and laser projection equipment

Abstract

The invention discloses a monochromatic laser light source, a color laser light source and laser projection equipment. The monochromatic laser light source includes N lasers, where N is an integer greater than or equal to 2, and each laser outputs light of the same color and the gray scale of the light is The values ​​are all less than M and are fixed values; N beams of light output by N lasers are combined into one beam, and by controlling whether each laser outputs light, the monochromatic laser light source can output any grayscale light in 0‑M . The interference images produced by the lasers emitted by the N lasers are not the same, and will not form a stable single interference pattern. Therefore, the monochromatic laser light source provided by the embodiment of the present invention greatly improves the speckle effect of the laser and improves the imaging quality. In addition , because it avoids high-frequency modulation of the laser by changing the driving current at high frequency, it is easy to realize the precise control of the gray scale value of the output light of the monochromatic laser light source.

Description

technical field [0001] The invention relates to the field of laser scanning, in particular to a monochrome laser light source, a color laser light source and a laser projection device. Background technique [0002] Due to the extremely wide color gamut of laser light, it has been widely used in laser scanning imaging systems such as MEMS, fiber optic scanning imaging and other scanning-based laser projection systems and traditional laser projection systems in recent years. However, on the one hand, while the laser has an extremely wide color gamut, the speckle effect produced by it will seriously affect the imaging quality of the laser projection system, and the cost of solving the speckle effect by vibrating the screen in the prior art is too high; On the one hand, in a laser projection system based on scanning, it is difficult to precisely control the grayscale value of the light output by the laser. The gray levels of the pixels are 255 and 254 respectively, so the laser...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a monochromatic laser light source, a color laser light source and a laser projection device, which are used to solve the problem that the laser speckle effect in the prior art affects the imaging quality of the laser scanning system and when the laser is modulated at high frequency. The difficulty is relatively high, and the technical problem that the performance of the laser will decline significantly over time

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