Laser scanning projecting device

Abstract

A laser scanning projecting device comprises an X-direction line scanning reflecting mirror and a liquid crystal deflection lens used for Y-direction field scanning. The liquid crystal deflection lens comprises parallel ITO conducting glass substrates on the outer layers of the two sides of the liquid crystal deflection lens and a filling layer in the middle of the liquid crystal deflection lens. The positive electrode and the negative electrode of a power source are connected to conducting layers of the ITO conducting glass substrates respectively to provide scanning voltages. The filling layer is filled by polymer optical media and liquid crystals together, the cross section, perpendicular to the ITO conducting glass substrates, of the filling layer is rectangular, and the boundary of the two sorts of filling media is a rectangular diagonal line. A laser vertically enters from the ITO conducting glass substrate on one side of the filled liquid crystals and exits from the ITO conducting glass substrate on the opposite side of the filled liquid crystals. Liquid crystal molecule state scanning voltage variation enables an incident ray polarized laser to deflect in the exiting process, and therefore field scanning of projection is achieved. The laser scanning projecting device is simple and compact in structure, solves the problem that existing equipment is large in size, and is easy to operate and low in energy loss.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a laser scanning projection device. Background technique [0002] Laser projection display technology (LDT), also known as laser projection technology or laser display technology, is a display technology that uses red, green, and blue (RGB) three primary color lasers as light sources. Compared with the traditional display light source, first of all, the laser has the advantages of good monochromaticity and directionality. Using the three primary colors of the laser as the display light source contains 90% of the colors that can be distinguished by the human eye. The color gamut space is large and the color Rich and high color saturation; secondly, the light source has a long service life and the overall cost of maintenance is low; the investment scale of production equipment is small and can be invested in installments; environmental protection and energy saving, the power ...

AI Technical Summary

Problems solved by technology

Among commonly used scanning devices, two-dimensional vibrating mirror scanners and multi-faceted rotating mirror scanners are driven by mechanical or micro-electromechanical systems. This structure is large in size and consumes a lot of energy, which is not conducive to energy saving and emission reduction Installation and use in narrow spaces

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