Method for recovering fluorescent powders of light emitting diode

A technology for light-emitting diodes and phosphors, applied in the directions of luminescent materials, recycling technologies, chemical instruments and methods, etc., can solve the problems of phosphor waste, environmental pollution, phosphor precipitation, etc., and achieve the goal of reducing production costs and reducing environmental pollution. Effect

Inactive Publication Date: 2010-02-17
SICHUAN JIUZHOU OPTOELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of coating the phosphor on the wafer, because the density of the phosphor is generally higher than that of the colloid, the phosphor is prone to precipitation. In order to ensure the quality of the product, it is necessary to limit the use time of the prepared phosphor. It is discarded, which causes a lot of waste of fluorescent powder, increases the production cost of products, and at the same time, the discarded fluorescent powder pollutes the environment

Method used

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  • Method for recovering fluorescent powders of light emitting diode
  • Method for recovering fluorescent powders of light emitting diode
  • Method for recovering fluorescent powders of light emitting diode

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The masses of silica gel and phosphor powder in the fluorescent glue prepared at a certain time are 6g and 2.028g respectively. After production according to the production requirements, the remaining fluorescent glue is 2.75g, and the remaining fluorescent glue is recovered according to the following method:

[0034] (1), cleaning:

[0035] Add 6g of cleaning agent methyl siloxane (OS-20) to the fluorescent glue mixed with fluorescent powder, stir for 2~3min, and let it stand for 1 hour under normal temperature and pressure. The fluorescent powder suspended in the cleaning agent settles on due to gravity. At the bottom of the container, solid-liquid separation is performed, and the cleaning agent methylsiloxane is removed to obtain solid phosphor;

[0036] Then add 6 g of the cleaning agent methyl siloxane (OS-20) to the obtained solid and repeat the washing. The washing method is the same as before, and the washing is repeated 3 times to remove the colloid in the fluorescent...

Embodiment 2

[0041] The masses of epoxy resin and phosphor powder in a prepared fluorescent glue are 13g and 3.575g respectively. After production according to the production requirements, the remaining fluorescent glue is 3.82g, and the remaining fluorescent glue is recovered according to the following method:

[0042] (1), cleaning:

[0043] Add 8g of cleaning agent acetone to the fluorescent glue mixed with fluorescent powder, stir for 10-15 minutes, and let stand for 30 minutes under normal temperature and pressure. The fluorescent powder suspended in the cleaning agent settles at the bottom of the container due to gravity, and the solid-liquid separation is removed for cleaning. 8g acetone to obtain solid phosphor;

[0044] Then add the cleaning agent acetone to the obtained solid, and repeat the washing. The washing method is the same as before, and the washing is repeated 5 times to remove the colloid in the fluorescent glue to obtain the phosphor;

[0045] (2) Drying:

[0046] The phosphor ...

Embodiment 3

[0049] The masses of silica gel and phosphor powder in the fluorescent glue prepared at a certain time are 6g and 2.028g respectively. After production according to the production requirements, the remaining fluorescent glue is 2.426g, and the remaining fluorescent glue is recovered according to the following method:

[0050] (1), cleaning:

[0051] Add 6g of cleaning agent methylsiloxane (OS-20) to the fluorescent glue mixed with fluorescent powder, stir for 20±2min, put the container in the centrifuge, set the speed to 5000r / min, the time is 90s, and suspend in The fluorescent powder in the cleaning agent is deposited on the bottom of the container due to the centrifugal force, and the solid-liquid separation is performed. 6g of the cleaning agent methylsiloxane is removed to obtain the solid fluorescent powder;

[0052] Then add the cleaning agent methylsiloxane (OS-20) to the obtained solid, and repeat the washing. The washing method is the same as before, and the washing is repe...

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Abstract

The invention discloses a method for recovering fluorescent powders of a light emitting diode, belonging to the field of application of photoelectric technology. The method for recovering fluorescentpowders of a light emitting diode comprises two steps of washing colloids by using a cleaning agent and drying the washed fluorescent powders. The fluorescent powders recovered according to the methodcan be directly used, and can be re-prepared into fluorescent glue coinciding with regulations by adding colloids according to a required proportion, so that the production cost can be obviously reduced, and the environment pollution can be lightened.

Description

Technical field [0001] The invention relates to the application field of photoelectric technology, in particular to a method for recycling phosphors of light-emitting diodes. Background technique [0002] With the rapid development of semiconductor technology and technology, various light-emitting diodes (Light Emitting Diode; LED) have been born. The luminous efficiency of white light LEDs has been continuously improved. It has the advantages of no pollution, low power consumption, high reliability, and long life. It is an environmentally friendly and energy-saving green lighting source. For this reason, the research on white LEDs has become a hot spot. [0003] There are three main types of methods for preparing white LEDs that have been reported: one is the phosphor conversion type, that is, white light is obtained through the combination of phosphor and LED; the second is the single-lamp combination type, that is, through the R, G, and B three-color LED, Control the relative ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/01
CPCY02W30/50
Inventor 李君飞童华南任恒李树林周晓琼夏鼎智周静
Owner SICHUAN JIUZHOU OPTOELECTRONIC TECH CO LTD
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