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Fluorescent sheet for white light illumination source generated by laser excitation and preparation method thereof

A lighting source and fluorescent sheet technology, which is applied in lighting and heating equipment, light sources, and optical elements used to change the spectral characteristics of emitted light, etc., can solve the problems of large divergence angle and low brightness of white light, and achieve high brightness and directional Good performance and small divergence angle

Active Publication Date: 2020-06-26
宁波富万信息科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a fluorescent sheet for laser excitation to generate white light illumination light source and its preparation method, aiming to solve the problems of large divergence angle and low brightness of the white light obtained by the existing scheme of laser excitation fluorescent sheet to form white light

Method used

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  • Fluorescent sheet for white light illumination source generated by laser excitation and preparation method thereof
  • Fluorescent sheet for white light illumination source generated by laser excitation and preparation method thereof
  • Fluorescent sheet for white light illumination source generated by laser excitation and preparation method thereof

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preparation example Construction

[0040] The embodiment of the present invention also provides a method for preparing the above-mentioned fluorescent sheet for generating white light by laser excitation, including the following steps:

[0041] (1) Cutting the material of the substrate layer 34 whose surface is covered with the metal specular reflection layer 33 into square pieces, cleaning and drying.

[0042] The material of the substrate layer 34 with the metal specular reflection layer 33 on the surface can be directly purchased or made by oneself, and the specific manufacturing method is as follows: when the metal specular reflection layer 33 and the substrate layer 34 are made of the same metal material, the substrate layer 34 can be After the surface is polished to meet the vacuum coating mirror standard, the metal mirror reflection layer 33 can be obtained; when the metal mirror reflection layer 33 and the base material layer 34 are made of different materials, a vacuum coating method can be used, and th...

Embodiment 1

[0053] (1) Purchase a 0.5 mm thick silicon wafer covered with a mirror-reflective gold film, cut into 20 mm by 20 mm squares as the metal reflection layer and high thermal conductivity substrate layer, clean, dry, and set aside.

[0054] (2) Evenly mix the thermosetting glue and yellow YAG fluorescent powder to obtain fluorescent glue, then spin-coat the fluorescent glue on the silicon wafer, heat and cure to obtain fluorescent glue layer 1, and the thickness after curing is 5 microns, the fluorescent glue layer One thickness is half of the thickness of the designed fluorescent adhesive layer.

[0055] (3) Purchasing Pb-Na-Si glass phase microspheres with a refractive index of 1.9 and a diameter of 200 microns, cleaned, dried, and set aside.

[0056] (4) Obtain a uniformly arranged single-layer microsphere layer by vibrating and extruding on a horizontal plate, and the microspheres are arranged in a single layer without defects through a microscope visual inspection.

[0057]...

Embodiment 2

[0059] (1) Purchase 2mm thick aluminum sheet, cut into 20mm by 20mm square piece, polish it into a mirror surface, degrease, clean, dry, and set aside, the polished and cut square aluminum piece is also the metal reflective layer and High thermal conductivity substrate layer.

[0060] (2) Evenly mix the heat-curing glue with yellow TAG phosphor powder and green aluminate phosphor powder to obtain fluorescent glue, then spin-coat the fluorescent glue on the polished surface of the aluminum sheet, heat and cure it, and obtain a fluorescent glue with a thickness of 2 microns layer one.

[0061] (3) Purchase Ti-Bi-Be glass phase microspheres with a refractive index of 2.2 and a diameter of 40 microns, wash, dry, and set aside.

[0062] (4) Fill the bottom surface of the container with a single layer of microspheres, disperse the microspheres that are filled with a single layer of the bottom surface of the container in the water phase, use an ultrasonic cleaning machine to achieve...

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Abstract

The invention provides a fluorescent sheet for generating a white light illumination light source by laser excitation and a preparation method thereof. The fluorescent sheet comprises a microsphere layer, a fluorescent glue layer, a metal mirror reflection layer and a base material layer, all of which are sequentially arranged from top to bottom, wherein the metal mirror reflection layer covers the surface of the base material layer; the fluorescent glue layer is coated on the surface of the metal mirror reflection layer; the microsphere layer is composed of uniformly arranged single-layer microspheres and the bottom of each of the single-layer microspheres is adhere to the fluorescent glue layer; and the diameter of each microsphere is 10-1000 microns, the refractive index of each microsphere is 1.8-2.2, and the ratio of the thickness of the fluorescent glue layer to the diameter of each microsphere is 0.01-0.1.The white light generated by the fluorescent sheet for generating the white light illumination light source by laser excitation has the advantages of good directivity, small divergence angle and high brightness, and is more applicable to illumination occasions such as automobile high-beam lamps.

Description

technical field [0001] The invention relates to the technical field of semiconductor laser lighting, in particular to a fluorescent sheet for a white light lighting source generated by laser excitation and a preparation method thereof. Background technique [0002] With the advancement of semiconductor technology, semiconductor lighting has developed rapidly. In many fields, semiconductor lighting has completely replaced conventional lighting. In the field of automotive lighting, automotive low beams have completely replaced the past halogen lamps with LED lamps. However, in the application of high beams, LED lights are not very bright, and the lighting effect is not much different from that of halogen lamps and xenon lamps, and the advantages are not obvious. Therefore, people began to consider using semiconductor lasers with higher brightness to design high beams. lamp. Semiconductor lasers have the advantages of high brightness, small size, long life, and high power con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21K9/64F21V9/32F21V13/02
Inventor 王文峰唐诗鄢安世赵江刘泱杰彭旷张军
Owner 宁波富万信息科技有限公司
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