Laser display system and method based on electro-optical deflection speckle suppression

Abstract

The invention discloses a laser display system and a laser display method based on electro-optical deflection speckle suppression. The system comprises a laser device for generating laser, a polarizer for generating linear polarization light in a specific polarization direction, an electro-optical deflector for deflecting light beams through electro-optical modulation, a long-focal-length focusing lens for focusing the light beams, a scatter plate for scattering the focused light beam and further reducing the coherence of light fields, a dodging module which consists of a micro lens array, a light flux pipe and a focusing lens and is used for collecting the scattered light fields and shaping the light, a linear space light modulator for generating an image and a projection lens component for projecting the image on a screen. The laser display system is simple, controllable, high in stability, low in loss and free of mechanical motion and has a stable structure, and high-quality laser display is realized.

Description

technical field [0001] The invention relates to the field of laser display, in particular to a laser display system and display method based on electro-optic deflection to suppress speckles. Background technique [0002] The display system using laser as the light source has the advantages of high color resolution, good color saturation, large chromaticity triangle area, and high brightness. Therefore, it can realize high-quality image display for large screens and small portable projections. It is a new generation of display technology direction of development. However, due to the high coherence of laser light, laser projection display systems are prone to speckle effects. The generation of speckle includes two aspects: the first aspect is the coherent superposition of secondary waves scattered by the optical surface in the projection light path, and the second aspect is the subjective speckle formed in the human eye by the scattered coherent light generated by the project...

AI Technical Summary

Problems solved by technology

However, since the rotation or vibration of the modulation element usually needs to be driven by a high-frequency motor, there are usually disadvantages such as system instability, noise generation, high optical loss, and large space requirements, resulting in unsatisfactory speckle suppression effects. With the trend of instrument miniaturization, traditional speckle suppression methods are increasingly unable to meet the needs

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