Unlock instant, AI-driven research and patent intelligence for your innovation.

Novel reflective projection light source device applying wavelength conversion principle

A wavelength conversion and light source device technology, applied in projection devices, optics, optical components, etc., can solve problems such as speckle noise, blue light hazards of display light sources, etc., and achieve the effect of taking into account safety, display performance, and eliminating speckle noise

Inactive Publication Date: 2017-01-25
青岛蓝之虹光电技术有限公司
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to provide a novel reflective projection light source device using the wavelength conversion principle to solve the blue light hazard and speckle noise problems of the display light source using laser as the excitation source

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
  • Novel reflective projection light source device applying wavelength conversion principle
  • Novel reflective projection light source device applying wavelength conversion principle
  • Novel reflective projection light source device applying wavelength conversion principle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] see figure 1 with figure 2 , an embodiment of a novel reflective projection light source device applying the principle of wavelength conversion in the present invention, comprising a reflective phosphor wheel 3, a dichroic color separation film 5, a filter layer 6, The lens group 7, the light tunnel (Light Tunnel) 8, and the dichroic film 5 are set at 45° to the optical axis; a laser light source 1 and a laser spot scattering film 2 are arranged on one side of the dichroic film 5 . Its structure and working principle are described as follows:

[0023] 1) The excitation light source 1 is a UV laser or a short-wavelength blue laser with a wavelength range of 300-410nm.

[0024] 2) After the excitation light source 1 is scattered by the laser spot scattering sheet 2, it is reflected by the dichroic separation sheet 5 and enters the phosphor wheel 3.

[0025] 3) The main feature of the dichroic filter 5 is that it almost completely reflects the light source in the UV ba...

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

A new reflective projection light source device using the principle of wavelength conversion, characterized in that it includes a reflective phosphor wheel, a dichroic color separation film, a filter layer, a lens group and a light guide arranged in sequence along the optical axis from back to front tube, the dichroic film is set at 45° to the optical axis; a laser light source and a laser spot scattering film are arranged on one side of the dichroic film. The advantages of the present invention are: in the wavelength-converting light source with laser as the excitation source, the danger caused by direct laser irradiation on the human body is effectively avoided, the damage to human eyes caused by near-ultraviolet blue light is solved, and the speckle noise of the displayed image is eliminated. Both security and display performance are taken into consideration.

Description

technical field [0001] The invention relates to a novel reflective projection light source device applying the principle of wavelength conversion, which can be used for various projection light sources such as liquid crystal, DLP, and LCOS. Background technique [0002] Laser light sources are currently widely used in the fields of projection and flat panel display. Since the three-color laser technology is not mature, a monochromatic laser + other light source (LED light source or phosphor stimulated light device) is usually used. Usually, a blue laser (usually at 440nm-470nm) is used as the excitation source, and red and green phosphors are used as the excited light source. Finally, a mixed light source of blue laser + red light source + green light source is realized. The blue light in the mixed light source is a laser with a single wavelength, and for the sake of excitation efficiency, the wavelength of the blue light is generally shorter. Therefore, the blue light com...

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): G03B21/20G02B27/48
CPCG03B21/204G02B27/48
Inventor 刘西锋
Owner 青岛蓝之虹光电技术有限公司