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Speckle-free three-primary-color laser light source

A laser light source and three-primary color technology, applied in the field of projection display, can solve problems such as affecting imaging quality and blurred projection images, and achieve the effects of reducing speckle effect, reducing speckle contrast, and saving costs

Inactive Publication Date: 2017-02-22
HUBEI JIUZHIYANG INFRARED SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the high coherence of lasers, the lasers projected onto the screen interfere with each other to produce bright and dark speckles, which is a common speckle phenomenon in laser displays. Speckles will cause blurred projection images and greatly affect imaging quality

Method used

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  • Speckle-free three-primary-color laser light source
  • Speckle-free three-primary-color laser light source
  • Speckle-free three-primary-color laser light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such asfigure 1 Shown is a basic embodiment of the speckle-free tri-color laser light source of the present invention. It includes: a laser module 1, a laser module 2, a laser module 3, an energy transmission fiber 4, a collimating lens 5, a converging lens 6, a scattering sheet 7 and a rectangular integrating rod 8.

[0054] The three laser modules 1, 2 and 3 are identical, and all include a red laser module, a green laser module and a blue laser module, which are used to emit lasers of three primary colors that meet brightness requirements.

[0055] Bundle the three laser fiber bundles 4 respectively output by the laser modules 1, 2 and 3, and arrange them in an equilateral triangle. After the output ends of the three optical fibers, each corresponds to a collimating lens 5, and the three collimating lenses 5 are arranged in a In the plane, the converging lens 6 is placed behind the collimating lens, such as image 3 shown.

[0056] The three laser beams are collima...

Embodiment 2

[0059] The difference from Embodiment 1 is that the number of laser modules included in the speckle-free three-primary-color laser light source is two, and the two optical fibers are bundled side by side. After the output end of each optical fiber, each corresponding to a collimating lens 5, the two collimating lenses The collimating lens is in one plane, and the converging lens 6 is placed behind the collimating lens, and the rear view of two collimating lenses and a converging lens is as follows Figure 4 shown.

Embodiment 3

[0061] The difference from Example 1 is that the number of laser modules included in the speckle-free three-primary-color laser light source is four, and the four optical fibers are bundled in a square arrangement, and each corresponding to a collimating lens 5 after the output end of each optical fiber, four Collimating lens 5 is in a plane, and converging lens 6 is placed on collimating lens rear, and the rear view of four collimating lenses and a converging lens is as Figure 5 shown.

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Abstract

The invention discloses a speckle-free three-primary-color laser light source, which comprises a plurality of laser modules, an energy-transfer fiber, a converging lens, a diffusion sheet and a rectangular integrating rod, wherein an output fiber outlet of each laser module corresponds to one collimating lens. According to the speckle-free three-primary-color laser light source, light emitted from the plurality of red, green and blue laser modules is combined and subjected to homogenizing and speckle-eliminating treatment to obtain high-brightness, speckle-free and high-uniformity lighting light required for projection and display.

Description

technical field [0001] The invention belongs to the technical field of projection display, and in particular relates to a speckle-free three-primary-color laser light source. Background technique [0002] Laser display technology is the fourth-generation display technology after black and white display, color display and digital display. It combines the characteristics of traditional projection display equipment and laser technology. It has high brightness, wide color gamut, high color reproduction, long life and energy saving. Environmental protection and other characteristics. In recent years, laser light sources have attracted more and more attention in the field of projection display technology. [0003] However, due to the high coherence of lasers, the lasers projected onto the screen interfere with each other to produce bright and dark speckles, which is a common speckle phenomenon in laser displays. Speckles will cause blurred projection images and greatly affect ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B27/48
CPCG03B21/2033G02B27/48G03B21/208
Inventor 刘在洲向康耿安兵李海速王源李升辉郑家凤郭磊
Owner HUBEI JIUZHIYANG INFRARED SYST CO LTD
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