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White light light-emitting diode (LED) high in temperature resistance and free of fluorescent powder

A phosphor-free, high-temperature-resistant technology, applied in the field of white light LEDs, can solve problems such as inability to ensure uniform distribution of phosphors, easy yellow circles in light color, and low packaging light efficiency, so as to save the link of secondary light distribution , Improve the effective service life of LED, and reduce the loss of blue light ability

Inactive Publication Date: 2013-05-15
HUZHOU JIYE PHOTOELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a key problem in the above three methods, that is, phosphor powder is required, and the traditional phosphor coating process is not only complicated but also cannot ensure the uniform distribution of phosphor powder, so the light color is prone to yellow circle phenomenon; in addition, LED is a Semiconductor products are most afraid of high temperature, and the high temperature resistance of inorganic materials such as phosphor powder is not high at about 180 degrees, and in high temperature environments, problems such as phase change, color drift, curing and cracking will occur. The patent publication number is The Chinese patent of CN101877374 (2010-11-03) provides a process for preparing white light LEDs using phosphor lenses. Although this process does not use phosphors, a large amount of silica gel is added in the process of making phosphor lenses, which is easy to cause Part of the blue light emitted by the LED chip is scattered back to the LED chip by the particles, and then absorbed by the chip, resulting in energy loss and low light efficiency of the package; moreover, the packaged silicone lens can withstand a maximum temperature of 160 degrees, and if the long-term high temperature will cause cracking, so how to make it LED has high temperature resistance and good luminous characteristics, so phosphor and silica gel process must be abandoned

Method used

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  • White light light-emitting diode (LED) high in temperature resistance and free of fluorescent powder
  • White light light-emitting diode (LED) high in temperature resistance and free of fluorescent powder
  • White light light-emitting diode (LED) high in temperature resistance and free of fluorescent powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The glass lens comprises the following steps to make successively: first make the SiO that accounts for 58% of the total moles of the raw material 2 , accounting for 14% of the total moles of the raw material Al 2 o 3 , accounting for 16% of the total moles of the raw material CaF 2 and the ZnO 2 Accounting for 3% ZnO of the total moles of the raw materials 2 Mixing and grinding to a particle size of 60 nanometers; grinding 3% of rare earth oxide europium oxide and cerium oxide to a particle size of 60 nanometers in the total moles of the raw materials; finally mixing the ground glass matrix and rare earth oxides Uniform; then put the above mixed powder into a corundum crucible, then put the crucible into a sintering furnace, and heat it to 1300°C at a speed of 30°C / min and keep the temperature for 30 minutes for melting to obtain molten glass. During the melting process Through the reducing gas hydrogen or carbon monoxide; then quickly pour the molten glass above i...

Embodiment 2

[0036] Same as Example 1, except that the rare earth oxides are praseodymium oxide and erbium oxide.

Embodiment 3

[0038] Same as Example 1, the difference is that the rare earth oxide is YAG: Ce 3+ Phosphor.

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Abstract

The invention relates to a white light light-emitting diode (LED) free of fluorescent powder, in particular to a white light LED high in temperature resistance and free of fluorescent powder, and provides the white light LED high in temperature resistance and free of fluorescent powder. The white light LED high in temperature resistance and free of fluorescent powder comprises a blue light chip fixed on a chip board and glass gens adding rare earth ion. Light emitted by the scare earth ion under illumination of blue light radiated by the blue light chip can mix with the blue light to from a white light. The white light LED high in temperature resistance and free of fluorescent powder has the advantages that temperature resistance is high, color development is even, packaging lighting effect is good, and product quality is high.

Description

technical field [0001] The invention relates to a white light LED without phosphor powder, in particular to a high temperature resistant white light LED without phosphor powder. Background technique [0002] There are three main lighting methods of the existing LED white light technology: one is to coat the blue LED chip with yellow phosphor powder that can be excited by blue light, and the blue light emitted by the chip and the yellow light emitted by the phosphor complement each other to form white light; The blue LED chip is coated with green and red phosphors, and the blue light emitted by the chip is combined with the green light and red light emitted by the phosphor to obtain white light; the third is to coat three primary colors or multiple colors on the purple or ultraviolet LED chip The fluorescent powder is used to excite the fluorescent powder by long-wave ultraviolet light (370nm-380nm) or purple light (380nm-410nm) emitted by the chip to achieve white light emis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/58
Inventor 陈杰
Owner HUZHOU JIYE PHOTOELECTRIC TECH CO LTD
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