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High-luminous-intensity ultraviolet excitation white light LED and manufacturing method thereof

A technology of luminous intensity and white light, applied in the field of white light LED, can solve problems such as color temperature instability, poor color saturation and color temperature, LED and phosphor performance degradation, etc.

Inactive Publication Date: 2017-10-17
苏州轻光材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This commercial phosphor also has some disadvantages, mainly poor color saturation and color temperature instability
The poor color saturation is due to the lack of red light in white light, and the instability of color temperature is caused by the degradation of LED and phosphor performance due to long-term use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below through specific examples, but the examples do not limit the protection scope of the present invention.

[0020] The present invention provides a high-luminous-intensity ultraviolet-excited white light LED. The white light LED includes a UVLED chip, a white phosphor colloid formed by mixing white phosphor powder and phosphor glue, and the white phosphor colloid is coated on the UVLED chip. 1-5wt% of curing agent is added to the white phosphor colloid, and the mass ratio of the white phosphor powder to the phosphor colloid is 1:2-3.

[0021] Further, the glue material of the fluorescent powder glue is silica gel, including glue A and glue B, and the mass ratio of glue A to glue B is 1:1~2.

[0022] Preferably, the mass ratio of glue A and glue B is 1:1.

[0023] Preferably, the glue A has a viscosity of 8000 mPa·s at 25°C, and the glue B has a viscosity of 3500 mPa·s at 25°C.

[0024] Preferably, the curing agent is...

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PUM

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Abstract

The invention discloses a high-luminous-intensity ultraviolet excitation white light LED. The white light LED comprises a UVLED chip and a white fluorescent powder colloid formed by a white fluorescent powder and a fluorescent powder glue. The white fluorescent powder colloid is coated on the UVLED chip. 1-5wt% curing agents are added in the white fluorescent powder colloid. A mass ratio of the white fluorescent powder to the fluorescent powder glue is 1: 2-3. The white light LED takes the UVLED chip as a matrix. Ultraviolet light is used to excite a white fluorescent colloid. The colloid is not easy to be decomposed by the ultraviolet light and ozone. There is no double bond. Under a high temperature (or radiant exposure), a chemical bond of a molecule is not fractured. During long-term usage, fracturing and hardening are not generated. After being cracked under an outside force, the colloid can be automatically healed.

Description

technical field [0001] The invention belongs to the technical field of white light LEDs, and in particular relates to a high luminous intensity ultraviolet excited white light LED and a preparation method thereof. Background technique [0002] GaN is a wide-bandgap compound semiconductor material, which has the characteristics of blue light emission, high temperature, high frequency, high voltage, high power, acid resistance, alkali resistance, and corrosion resistance. It is one of the most important semiconductor materials after germanium, silicon, and gallium arsenide. one. It occupies an important position in the field of blue light and ultraviolet optoelectronics technology, and is also an ideal material for making high-temperature and high-power semiconductor devices. [0003] At present, the main methods for obtaining white light from GaN-based LEDs are: blue LED + yellow phosphor powder, three-color LED synthetic white light, and purple LED + three-color phosphor po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/48H01L33/50H01L33/56
CPCH01L33/48H01L33/502H01L33/56
Inventor 马必鹉董安钢张家奇夏浩孚陈延兵
Owner 苏州轻光材料科技有限公司