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A laser scanning projection device

A technology of projection device and laser scanning, applied in the direction of using projection device image reproducer, projection device, optics, etc., can solve the problems of unfavorable energy saving and emission reduction, unfavorable installation and use, large volume, etc., and achieve easy operation, simple and compact structure , to overcome the bulky effect

Inactive Publication Date: 2017-02-22
徐州奕创光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A laser scanning projection device
  • A laser scanning projection device
  • A laser scanning projection device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 What is shown is the principle of using a two-dimensional galvanometer for laser scanning projection in the prior art. The incident light passes through two galvanometers to perform line scanning and field scanning respectively to form a two-dimensional image on the display plane. The technical scheme of the present invention replaces the field scanning vibrating mirror in the prior art with a liquid crystal deflection lens 4 . The incident laser light 81 is first incident on the line scanning galvanometer 1, the deflection direction of the reflected light is the X-axis direction, and the reflected light is incident on the liquid crystal deflection lens 4 again, and the transmitted light is deflected by using the different states of the liquid crystal 62 molecules under the change of the applied voltage, thereby Under the action of the scanning voltage, the outgoing laser light 82 completes field scanning along the vertical direction, that is, the direction of ...

Embodiment 2

[0035] image 3 Shown is another embodiment of the projection device of the present invention, which is different from Embodiment 1 in that the vibrating mirror 1 is replaced by a multi-faceted rotating mirror 2, and the remaining display principles and parameter selection and setting methods are the same.

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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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10G02F1/29G03B21/14H04N5/74H04N9/31
Inventor 王欢闫国枫陈昱
Owner 徐州奕创光电科技有限公司