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Laser projection device

A technology of laser projection and equipment, applied in optics, optical components, instruments, etc., can solve the problems of low quality and efficiency of three-color combined light, and degradation of projected picture quality

Active Publication Date: 2020-08-21
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the difference between the above-mentioned red laser and blue and green lasers has caused some problems in the quality and efficiency of the three-color combined light when the three-color laser is used as a light source, which will cause the quality of the projected picture in the laser projection device decline

Method used

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Embodiment Construction

[0036] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0037] image 3 shows a schematic structural diagram of a laser projection device, first according to image 3 The shown example of the laser projection device is used to illustrate the structure and working process of the laser projection device in this embodiment.

[0038] The laser projection device 10 includes a complete machine housing 011 and a base 0...

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Abstract

The invention provides laser projection equipment, which is characterized in that a laser assembly used by the laser projection equipment emits a first-color laser beam, a second-color laser beam anda third-color laser beam, wherein the angles of the light spot beams of the three laser beams are different; a light combining lens group at least comprises a third light combining lens, the first-color laser beam and the second-color laser beam enter the first surface of the third light combining lens and are transmitted through the first surface, and the first surface is provided with a convex microstructure; the third-color laser beam enters the second surface of the third light combining lens, and is reflected to a light outlet of a light source; and the beam angles of the first-color laser beam and the second-color laser beam transmitted through the first surface of the third light combining lens are increased, the angle difference between the first-color laser beam and the second-color laser beam and the angle of the third-color laser beam is reduced, and the overlap ratio of laser spots of three colors is improved, so that the color uniformity of light combining spots is improved, and the display quality of a projection picture is improved.

Description

technical field [0001] The present application relates to the technical field of laser projection display, in particular to a laser projection device. Background technique [0002] The laser light source has the advantages of good monochromaticity, high brightness, and long life, and is an ideal light source. As the power of laser devices increases to meet the requirements of industrial applications, lasers are gradually being used as light sources for lighting. For example, in recent years, lasers have been used as projection light sources in projection equipment, gradually replacing mercury lamp lighting. Compared with LED light sources, lasers also have the advantages of small etendue and high brightness. [0003] Lasers are divided into blue lasers, red lasers and green lasers according to the type of light emitting, which emit blue lasers, red lasers and green lasers respectively. Among them, the blue laser was the first to be applied industrially. The red and green l...

Claims

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Application Information

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IPC IPC(8): G03B21/20G02B27/10
CPCG03B21/2033G03B21/2013G03B21/208G02B27/1006
Inventor 李巍顾晓强田有良
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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