Laser light source and control method thereof

A laser light source and laser source technology, applied in the field of light sources, can solve problems such as poor interchangeability, many optical lenses, and dark red

Active Publication Date: 2018-09-14
成都九天光学技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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),

Method used

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  • Laser light source and control method thereof
  • Laser light source and control method thereof
  • Laser light source and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Such as figure 1 , 2 As shown, the laser light source includes: a laser source (1), a first focusing module, a first diffusing sheet (4), a first focusing module, a splitting switch element (5), a second focusing module, a diffusing unit and a light rod (11).

[0099] The laser source (1) is used to provide blue laser light.

[0100] The first light concentrating module is used for collimating and compressing the laser light emitted by the laser source (1), and projecting it onto the first diffusion sheet (4). In this embodiment, the first light concentrating module includes a collimating lens (2) and a compressing lens (3), which are respectively used for collimating light and compressing the relationship.

[0101] The first diffusion sheet (4) is used for eliminating laser speckle, and at the same time makes the light spot on the fluorescent powder wheel (8) uniform, and the fluorescence excitation efficiency is high.

[0102] The first focusing module is used for...

Embodiment 2

[0142] Such as image 3 , 4 As shown, embodiment two is based on embodiment one, and its difference with embodiment one is:

[0143] The laser source (1) provides red laser light in addition to blue laser light;

[0144] The light-splitting switch element (5) reflects blue laser light and red laser light, and transmits light of other colors; when the state is one, the light-splitting switch element (5) will use the light from the first diffusion sheet (4) to excite the fluorescent powder. The blue laser light is reflected to the second focusing module, the laser is focused by the second focusing module and then irradiates the phosphor wheel (8), the phosphor area on the phosphor wheel (8) excites the fluorescence of the corresponding color, and the fluorescence passes through the second focusing module focused and projected to the second focusing module through the spectroscopic switch element (5), and the fluorescent light focused by the second focusing module passes throug...

Embodiment 3

[0164] Such as image 3 , 4 Shown, the basic embodiment two of embodiment three, its difference with embodiment two is:

[0165] The laser source (1) provides green laser besides blue laser and red laser;

[0166] The light-splitting switch element (5) reflects blue laser light, red laser light and green laser light, and transmits light of other colors; when the state is one, the light-splitting switch element (5) uses light from the first diffusion sheet (4) for exciting The blue laser light of the phosphor powder is reflected to the second focusing module, and the laser beam is focused by the second focusing module and illuminates the phosphor powder wheel (8), and the phosphor powder area on the phosphor powder wheel (8) excites yellow fluorescence, and the yellow fluorescence passes through The second focusing module focuses and projects to the second focusing module through the spectroscopic switch element (5), and the fluorescent light focused by the second focusing mo...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G03B21/20
CPCG03B21/204G03B21/208
Inventor 彭水海
Owner 成都九天光学技术有限公司
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