Laser light emitting device, light source and projection display system

A light-emitting device and laser technology, applied in projection devices, optics, optical components, etc., can solve the problems of insufficient compact structure and high space requirements, and achieve the effect of small space and small etendue

Active Publication Date: 2015-08-12
杨毅
View PDF8 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in order to fully homogenize the light spots, a relatively long optical path is required to make each lig

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Laser light emitting device, light source and projection display system
  • Laser light emitting device, light source and projection display system
  • Laser light emitting device, light source and projection display system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] The present invention provides a laser light-emitting device, the structure diagram of the first embodiment is as Figure 2A Shown. The laser light-emitting device includes multiple lasers (not shown in the figure) for emitting multiple parallel laser beams 211, 212, 213, and also includes a focusing lens 201 for combining multiple parallel laser beams 211, 212, 213 is focused to form a light cone 214. The focusing lens 201 may be a piece of lens or a lens group, which is not limited here. The laser light emitting device further includes a light scattering element 202 at the rear end of the optical path of the focusing lens 201, and the scattering angle of the light scattering element 202 is not less than two-thirds of the maximum angle between adjacent laser beams after focusing.

[0021] First, it is necessary to explain the two concepts of the maximum included angle of adjacent laser beams and the scattering angle of the light scattering element. Such as Figure 2A , ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a laser light emitting device, a light source and a projection display system. The laser light emitting device includes a plurality of lasers used for emitting a plurality of parallel laser beams, a focusing lens used for focusing the plurality of parallel laser beams, and a light scattering component located at the rear end of the light path of the focusing lens; the light scattering component is located at a light path position A, so that the diameter of a circumcircle of a region jointly formed by light spots on the light scattering component which are formed through irradiation of the plurality of laser beams is smaller than 1/5 of the diameter of a circumcircle of a region jointly formed by light spots on the section of the plurality of parallel laser beams; and the scattering angle of the light scattering component is not smaller than 2/3 of a maximum included angle of adjacent laser beams after focusing. Compared with the prior art, outgoing beams of the laser light emitting device of the invention are collimating with light spots uniformly distributed, and therefore, optical extension quantity is smaller; and the outgoing beams can be overlapped with each other without a long light path required, and therefore, a required space is small.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a laser light emitting device, a light source and a projection display system using the laser light emitting device. Background technique [0002] Projection technology has been widely used in our life and work, such as projectors. At present, the light source in projection technology is still dominated by high-pressure mercury lamps. However, the lifespan of the high-pressure mercury lamp is only a few thousand hours. If the lamp is used for a long time, it will dim and affect the display effect. Alternatives to high-pressure mercury lamps include LED light sources and laser light sources, both of which have the advantage of long life, but the difference is that LED light sources are not bright enough but cheap, and laser light sources are bright but expensive. [0003] From the perspective of technological development, it is an inevitable trend for laser light sources to r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G03B21/20G02B27/09G02B27/30G02B27/48
CPCG02B27/0938G02B27/0955G02B27/30G02B27/48G03B21/208
Inventor 杨毅
Owner 杨毅
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products