Encapsulation construction of LED

Abstract

The invention provides an LED package structure which comprises a bearing unit, an LED chip and a composite material layer. The LED chip is positioned on the bearing unit; and the composite material layer is partially or completely covered on the surface of the bearing unit which is close to the LED chip; wherein, the composite material layer comprises resin material and inorganic dielectric material, and the resin material is provided with a first refraction coefficient; the inorganic dielectric material is mixed in the resin material and is provided with a second refraction coefficient, wherein, the first refraction coefficient is less than the second refraction coefficient, and the difference value between the first refraction coefficient and the second refraction coefficient is at least more than 0.2. The LED package structure can increase ray reflectivity of the LED package structure by modifying materials, which improves the light emitting efficiency of the LED package structure and greatly prolongs the service life of the LED package structure.

Description

technical field [0001] The invention relates to a light emitting diode packaging structure, in particular to a light emitting diode packaging structure with high reflectivity and high heat resistance. Background technique [0002] In response to the goal of saving energy, it has become the mainstream research of luminous technology to find out the luminous source that can replace the known poor luminous efficiency. In terms of the current technology, the most potential alternative luminous source should be the light-emitting diode. [0003] However, it is well known that in terms of the existing light emitting diode packaging structure, taking the reflection cup structure as an example, it can be made of resin or ceramic materials, wherein the heat conduction effect of the reflection cup of ceramic material is better than that of resin material, but , the light-emitting diode package structure made of ceramic materials (such as: aluminum nitride) can only reach the specifica...

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Problems solved by technology

[0003] However, it is well known that in terms of the existing light emitting diode packaging structure, taking the reflection cup structure as an example, it can be made of resin or ceramic materials, wherein the heat conduction effect of the reflection cup of ceramic material is better than that of resin material, but , the light-emitting diode package structure made of ceramic materials (such as: aluminum nitride) can only reach the specifications of about 3.0 mm * 2.0 mm * 1.2 mm in the minimum size limit of length, width, and height, and can only be formed with a right-angle shape. The packaging structure of the state cannot meet the needs of the miniaturized LED packaging structure, and is not conducive to the reflection of light. Therefore, for portable display devices that need to use the miniaturized LED packaging structure as a light source, it is still necessary to use a resin material ( Example: Reflective cup made of poly(p-phenylene terephthalamide, PPA)

However, due to the poor heat resistance of the resin material itself, for example, after 126 hours of operation at an operating temperature of 140 degrees Celsius, poly-p-phenylene terephthalamide will have obvious yellowing and deterioration problems

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