White light emitting device based on purple LED

A light-emitting device, purple light technology, applied in the field of lighting, can solve the problem of low photoexcitation conversion efficiency of three primary color phosphors

Inactive Publication Date: 2015-11-25
OCEANS KING LIGHTING SCI&TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a light conversion efficiency method for the defect that the combination of the purple LED chip and the three-primary-color phosphor powder in the prior art realizes white light emission, but the photoexcitation conversion efficiency of the three-primary-color phosphor powder is low. Violet LED-based white light emitting device with high color rendering coefficient

Method used

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  • White light emitting device based on purple LED
  • White light emitting device based on purple LED
  • White light emitting device based on purple LED

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preparation example Construction

[0020] The preparation method of Eu-doped high-silica blue light-emitting glass is as follows:

[0021] First, the raw material containing Eu ions is made into an aqueous solution containing Eu ions, nitric acid solution, sulfuric acid solution, ethanol solution or acetone solution, and then the SiO 2 The high-silica porous glass with a content of more than 95wt% is immersed in the solution, wherein the concentration of Eu ions is 0.005-0.1M. According to the different requirements for the absorption of ultraviolet light and the luminous intensity of blue light, the high-silica porous glass can be soaked In different concentrations of Eu ion solutions, high-silica luminescent glasses with different Eu ion contents are made to control the absorption of ultraviolet light and the luminous intensity of blue light. After soaking, the high-silica porous glass is taken out and dried, and then placed in high temperature Furnace, at 95%N 2 +5%H 2 Under a reducing atmosphere, after si...

Embodiment 1

[0023] Example 1, such as figure 2 As shown, a white light emitting device based on purple LEDs includes a housing 3, a support plate 2 is provided inside the housing 3, and at least one purple LED semiconductor light source 1 with an emission wavelength in the range of 210nm to 410nm is provided on the support plate 2, In this embodiment, four purple LED semiconductor light sources 1 are arranged, and a high-silica light-emitting glass plate 4 doped with Eu ions opposite to the purple LED semiconductor light source 1 is also arranged in the housing 1. The purple LED semiconductor light source 1 and the Eu ion-doped A gap is left between the high-silica luminescent glass plates 4, and one side of the high-silica luminescent glass plate facing away from the purple LED semiconductor light source is provided with a mixture of yellow phosphor and red phosphor, a mixture of green phosphor and red phosphor, and a yellow phosphor. A phosphor layer 5 formed by one of the phosphors. ...

Embodiment 2

[0024] Example 2, a white light emitting device based on purple LEDs, the yellow phosphor in the phosphor layer 5 is a silicate phosphor with broadband excitation. In this example, Dalian Luming Lighting Technology Co., Ltd. LMS is selected. A series of rare earth-activated silicate phosphors (product number LMS-550), the structure of the device in this embodiment, the selection of violet LEDs and the coating method of the phosphors are the same as those in Embodiment 1, and will not be repeated here.

[0025] The excitation and emission spectra of the yellow phosphor LMS-550 are shown in image 3 , It can be seen from its excitation spectrum that LMS-550 phosphor can efficiently absorb blue-violet light from 300nm to 460nm and emit yellow light around 550nm. In this device, most of the 365nm purple light emitted by the purple LED is absorbed by the Eu-doped high-silica luminescent glass plate 4, and emits 442nm blue light, and the blue light emitted by the Eu-doped high-silic...

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Abstract

The present invention relates to a white light emitting device based on purple light LED. The white light emitting device includes a housing, a support plate, at least one purple light LED semiconductor light source, and a piece of high silica luminescent glass. The support plate is received in the housing. The at least one purple light LED semiconductor light source is positioned on the support plate. The piece of high silica luminescent glass doped with Eu ions is opposite to the purple light LED semiconductor light source. One surface of the high silica luminescent glass away from the purple light LED semiconductor light source is coated with a phosphor layer formed with a selection from a mixture of yellow phosphor and red phosphor, a mixture of green phosphor and red phosphor, and yellow phosphor.

Description

technical field [0001] The invention belongs to the technical field of lighting, and relates to a light emitting device, in particular to a white light emitting device based on a purple LED. Background technique [0002] Luminescent glass is a new type of luminescent material developed in recent years. Among them, the high-silica luminescent glass series of luminescent materials can be efficiently excited by purple light, and the luminescent spectrum covers the visible light region. The preparation method of high-silica luminescent glass series luminescent materials is to use SiO 2 Porous glass with a content of more than 95wt% (weight percent) is the matrix glass, and the porous glass is immersed in an aqueous solution, an acid solution or an organic solution containing active ions (such as Eu, Ce, Tb, Cu, Zn, Sn, etc.) by solution immersion method , and then sintered at high temperature (above 1050°C) in air or reducing atmosphere. [0003] At present, the combination of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L23/00H01L25/03H01L25/075H01L33/00G09F9/33F21K2/06F21V9/02C09K11/08C09K11/06F21Y101/02
CPCC09K11/7734C03C14/006C03C17/22C03C2214/16F21V3/0418F21V3/0481F21V9/16F21Y2101/02H01L25/0753H01L33/507H01L2924/0002Y02B20/181F21Y2115/10F21V3/061F21V3/12F21V9/38F21V9/06Y02B20/00C09K11/77342H01L2924/00
Inventor 周明杰马文波乔延波时朝璞李清涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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