Light emitting device and projection display device

A light-emitting device and a light-splitting device technology, applied in the field of light sources, can solve the problems of impure color of outgoing light, complex and large structure, etc., and achieve the effect of simple structure and guaranteed monochromaticity

Active Publication Date: 2015-12-23
杨毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current solutions have certain defects, either because of their complicated structure or impure color of emitted light.

Method used

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  • Light emitting device and projection display device
  • Light emitting device and projection display device
  • Light emitting device and projection display device

Examples

Experimental program
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Embodiment Construction

[0018] The present invention proposes a light emitting device, the structural schematic diagram of the first embodiment is as follows figure 1 shown. The light emitting device includes a laser light source 101 for emitting primary laser light 121 , and also includes a beam splitting device 102 and a light concentrating device 103 located at the rear end of the light path of the beam splitting device. Among them, such as image 3 As shown, the spectroscopic device 102 includes a lead-in region 102a and a lead-out region 102b, and the original laser light 121 emitted by the laser light source 101 is incident on the lead-in region 102a of the spectroscopic device.

[0019] The light emitted from different areas on the spectroscopic device 102 will be in different angular ranges after being concentrated by the light-condensing device 103, that is, the angular distribution range of the light emitted from the introduction area 102a after being concentrated by the light-condensing d...

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PUM

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Abstract

A light emitting device and a projection display device are provided. The light emitting device comprises a laser light source used for emitting original laser light, and further comprises a light splitting device and a light condensing device disposed at the rear end of the light path of the light splitting device. The light splitting device includes an import area and an export area. The light emitting device further comprises a wavelength conversion device. The wavelength conversion device includes a wavelength conversion section and a reflection and scattering section. The wavelength conversion section includes a reflection layer and a wavelength conversion layer covering the surface of the reflection layer. The wavelength conversion device further includes a functional light filter covering the surface of the wavelength conversion layer and a driving device. The import area of the light splitting device reflects laser light, the export area transmits laser light, and both the import area and the export area transmit excited light. Through cooperation of the two areas of the light splitting device and the functional light filter, first scattered laser light emitted from the wavelength conversion section is successfully suppressed and cannot be emitted out, and most of second scattered laser light emitted from the reflection and scattering section can be emitted out.

Description

technical field [0001] The invention relates to the field of light sources, in particular to a light emitting device and a projection display device using the light emitting device. Background technique [0002] At present, the laser excites the rotating phosphor turntable to generate time-sharing fluorescence, and this method has been widely used in the projection display industry. However, the current solutions either have complex structures or impure colors of emitted light, which have certain defects. Therefore, there is a great need for a solution that is efficient, compact, and has a good color of the emitted light. Contents of the invention [0003] The present invention proposes a light-emitting device, which includes a laser light source for emitting primary laser light, a spectroscopic device and a light concentrating device located at the rear end of the optical path of the spectroscopic device, wherein the spectroscopic device includes a lead-in area and a lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/20G02B26/00G02B27/10
Inventor 杨毅
Owner 杨毅
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