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Wavelength converting member, manufacturing method thereof, and light emitting device

A technology of wavelength conversion and manufacturing method, which is applied in the direction of luminescent materials, lighting devices, luminescent coatings, etc., can solve the problem of not clearly describing the detailed structure of the abutment part of the fluorescent layer and the radiator abutment method, and achieves suppression of thermal quenching, The effect of efficient heat dissipation

Active Publication Date: 2021-04-27
NGK SPARK PLUG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Patent Document 7 does not clearly describe the detailed structure of the abutment method and abutment position between the fluorescent layer and the heat sink.

Method used

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  • Wavelength converting member, manufacturing method thereof, and light emitting device
  • Wavelength converting member, manufacturing method thereof, and light emitting device
  • Wavelength converting member, manufacturing method thereof, and light emitting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0073] (1. Evaluation of joining state)

[0074] (1-1) Preparation method of the sample

[0075] The wavelength conversion members of Example 1, Comparative Examples 1 and 2 were fabricated. First, ethyl silicate, terpineol, and YAG phosphor particles (average particle diameter: 18 μm) were mixed to prepare a paste.

[0076] The prepared paste was applied on a sapphire plate serving as a transmissive material to a thickness of 40 μm using a screen printing method, followed by heat treatment to obtain an intermediate member. SEM observation was performed on a cross section perpendicular to the reflecting surface of the obtained intermediate member. Figure 4 (a) is a SEM photograph showing a partial cross section of a wavelength conversion member (cross section of an intermediate member). in addition, Figure 4 (b) is Figure 4 Si element mapping image of a partial cross-section of the wavelength conversion member shown in the SEM photograph of (a). It was confirmed that ...

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Abstract

The present invention provides a wavelength conversion member capable of efficiently dissipating heat from a position where heat is likely to be generated in response to irradiation of light with high energy density, and capable of suppressing thermal quenching of phosphors, a manufacturing method thereof, and a light emitting device. A reflective wavelength conversion member (100) that converts light of a specific range of wavelengths into light of other wavelengths and forms irradiated light by reflecting the light on a reflective surface, comprising: a transmissive material (110) composed of An inorganic material is formed and transmits light; a phosphor layer (120) is bonded to the transmissive material (110) and is composed of phosphor particles that emit converted light for absorbed light and translucent ceramics that combine the phosphor particles with each other; A reflective material (130) is arranged on the opposite side of the transmissive material (110) in a state of being in contact with the phosphor layer (120), and has a surface serving as a reflective surface for converting light. Accordingly, it is possible to efficiently dissipate heat from a position where heat is likely to be generated for irradiation with light having a high energy density, and to suppress thermal quenching of the phosphor.

Description

technical field [0001] The present invention relates to a reflective wavelength conversion member that converts light of a specific range of wavelengths into light of other wavelengths and forms irradiated light by reflecting the light on a reflective surface, its manufacturing method, and a light emitting device. Background technique [0002] As a light-emitting element, there is known a light-emitting element in which a wavelength conversion member in which phosphor particles are dispersed in a resin typified by epoxy resin or silicone resin is disposed so as to contact a blue LED element. Furthermore, in recent years, instead of LEDs, laser diodes (LDs), which have high energy efficiency and are easy to cope with miniaturization and high output, have been increasingly used. [0003] Since the laser beam is locally irradiated with high-energy light, the irradiated portion of the resin that is intensively irradiated with the laser beam is scorched. In this regard, it is kn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20C09K11/08H01L33/50
CPCC09K11/08G02B5/20H01L33/50C09K11/7706C09D5/22H01L33/10H01L33/44H01L33/502F21V29/70F21Y2115/30F21K9/64F21Y2115/10F21V9/32F21V13/08
Inventor 佐藤友美传井美史阿部誉史佐藤豊
Owner NGK SPARK PLUG CO LTD
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