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Wavelength conversion member and remote phosphor type light emitting apparatus

A technology for wavelength conversion and light-emitting devices, which can be applied to lighting devices, air-proof/waterproof devices, and parts of lighting devices. The effect of illumination

Inactive Publication Date: 2015-11-25
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Light-emitting devices that allow design in consideration of light quantity distribution and chromaticity distribution in various directions so as to meet the design reference requirements of the space to be illuminated are not common; thus, there are restrictions on the design of the illuminated space

Method used

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  • Wavelength conversion member and remote phosphor type light emitting apparatus
  • Wavelength conversion member and remote phosphor type light emitting apparatus
  • Wavelength conversion member and remote phosphor type light emitting apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] 9,800 g of non-modified polypropylene with a specific gravity of 0.91, 200 g of YAG:Ce with an average particle size of 18.0 μm 3+ Phosphor and 100 g of silicon powder having an average particle diameter of 5.5 μm were mixed in a mixer to obtain phosphor-containing resin pellets 1 . In addition, 9,000 g of non-modified polypropylene having a specific gravity of 0.91 and 1,000 g of KSF phosphor (K 2 SiF 6 :Mn) were mixed in a mixer to obtain phosphor-containing pellets 2.

[0066] Phosphor-containing Pellet 1 and Phosphor-containing Pellet 2 were subjected to two-color extrusion, taking care so that air would not enter the interface between the layers, followed by extrusion to form a hemisphere with a thickness of 2 mm and a diameter of 300 mm Shape a hat-like shape to obtain a light-emitting part that consists of two layers. The light-emitting parts thus obtained contain YAG:Ce in the outer layer of the hemispherical cap shape, respectively 3+ Phosphor, and contains...

example 2

[0076]The steps up to extrusion molding were performed in the same manner as in Example 1. Then, the inner hemispherical surface of the hemispherical cap-shaped luminous part is completely covered by the shading strip, whereas the outer hemispherical surface is covered by the shading strip in the manner of a grid. In addition, as in Example 1, the part of the light-emitting member that is not covered with the masking tape (a part of the outer hemispherical surface and the circular bottom surface of the hemispherical cap-shaped light-emitting member) was coated with acrylic-modified silicone resin to obtain a The wavelength conversion part of the reflective layer.

[0077] Light having a central wavelength of 460 nm emitted by the blue LED is irradiated onto the wavelength conversion member from the inner hemispherical surface side of the wavelength conversion member. As a result, white light is obtained from both the inner and outer hemispheres of the wavelength converting me...

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Abstract

A wavelength conversion member including a light emitting member being a molding of a mixture containing a transparent or translucent polymer material and a phosphor, and a reflection layer laminated on part of a surface of the light emitting member. In the wavelength conversion member which converts light from a light source by the phosphor and radiates the converted light in a desired direction, light emitted from the phosphor in the wavelength conversion member which is emitted in other directions than desired radiating direction can be efficiently utilized without loss.

Description

technical field [0001] The present invention relates to a wavelength converting member for converting light from a light source by means of a phosphor and efficiently emitting the converted light in a desired direction, and to wherein the wavelength converting member and a light emitting diode are arranged away from each other remote phosphor-type light emitting device. Background technique [0002] Light emitting diodes (LEDs) are among the most efficient light sources currently available. In particular, white LEDs are rapidly expanding their market share as next-generation light sources replacing incandescent lamps, fluorescent lamps, cold cathode fluorescent lamp (CCFL) backlights, and halogen lamps. As a configuration for realizing a white LED, a white LED based on a combination of a blue light-emitting diode (blue LED) and a phosphor that emits light of a longer wavelength (eg, yellow or green light) when excited by blue light has been put into practical use. . In ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50H01L33/60
CPCF21K9/56F21V3/0463F21V7/0008F21V7/0066F21V7/22F21V31/005F21Y2101/02H01L33/50H01L33/60F21K9/64F21Y2115/10F21V3/08
Inventor 绵谷和浩津森俊宏塚谷敏彦
Owner SHIN ETSU CHEM CO LTD