Laser light source and control method thereof

Abstract

The invention discloses a laser light source, which comprises a laser source, a first concentration module, a first diffusion sheet, a first focusing module, a fluorescent powder wheel, a second focusing module, a light stick, a diffusion unit and a light splitting switch element, wherein in a state I, the light splitting switch element reflects laser, used for stimulating fluorescent powder, fromthe first diffusion sheet to the second focusing module; in a state II, the light splitting switch element reflects the laser from the first diffusion sheet to the second focusing module. The invention further discloses a laser light source control method, which comprises the following steps: Step I, adjusting the light splitting switch element to the state I; Step II, outputting light emitted bythe fluorescent powder wheel, or outputting light which is emitted by the fluorescent powder wheel and filtered by a region corresponding to a filter wheel, or outputting light which passes through asecond diffusion sheet; Step III, adjusting the light splitting switch element to the state II; Step IV, outputting the light emitted by the laser source. The laser light source is simple in structure, small in size and high in optical efficiency and can be compatible with various light source schemes.

Description

technical field [0001] The invention relates to the field of light sources, in particular to a laser-based light source for a laser projector. Background technique [0002] At present, compared with traditional projectors, laser projectors have the advantages of long life, wide color gamut and convenient maintenance. Now, the light source part generally uses a single blue laser. The laser excites green and yellow phosphors to obtain green and yellow light, and then filters the yellow light to obtain red light, so that the light source can output red, yellow, blue and green light or obtain red light. , Blue And Green Lights. For example: Document 1, a segmented fluorescent panel laser projector, announcement number: CN206270637U, authorized announcement date: 2017.06.20. However, there is a problem with monochromatic light source: the color of red light is not bright enough, and the yellow light is excited by blue laser and then filtered to obtain red light. The light conve...

AI Technical Summary

Problems solved by technology

However, there is a problem with monochromatic light source: the color of red light is not bright enough, and the yellow light is excited by blue laser and then filtered by filter to obtain red light. distinct

In addition to the complex structure, many optical lenses, high cost and large volume, the above three light source solutions also have the following problems:

[0006] 1. Due to the complex structure and many lenses (including reflectors), the optical path is longer and the optical efficiency is lower;

[0007] 2. The interchangeability of the three light source schemes (single-color, two-color and three laser light sources) is poor. To increase or decrease the laser source, it may be necessary to increase or decrease the corresponding overall structure, such as reflectors, lens systems corresponding to lasers, etc. , additional molds are required, which increases production costs

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