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A technology of light-emitting diodes and phosphors, which is applied in the direction of electrical components, circuits, semiconductor devices, etc., can solve the problems of uneven color mixing of light-emitting diodes, low excitation efficiency and low excitation efficiency, and achieve good light-emitting effects and increase the probability of excitation.

Active Publication Date: 2017-05-24
ZHANJING TECH SHENZHEN +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the excitation efficiency of nitride red phosphors receiving blue light is lower than that of nitrogen oxide green phosphors
Therefore, distributing different fluorescent powders evenly in the transparent encapsulation layer will lead to the problem of uneven color mixing of light emitting diodes.

Method used

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Embodiment Construction

[0012] Such as figure 1 As shown, a light emitting diode 100 according to an embodiment of the present invention includes a light emitting diode chip 10, an encapsulation layer 20 encapsulating the light emitting diode chip 10, and a plurality of first phosphor particles 30 and a plurality of phosphor particles disposed in the encapsulation layer 20. The second phosphor particles 40 .

[0013] The excitation efficiency of the first phosphor particles 30 is lower than that of the second phosphor particles 40 . Here, the comparison of the excitation efficiency of the phosphor refers to the comparison of the probability of the phosphor being excited by the light source at the same distance from the light source. Both the first phosphor particle 30 and the second phosphor particle 40 are spherical and have approximately the same volume. The density of the first phosphor particles 30 is greater than the density of the encapsulation layer 20 , and the density of the second phospho...

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Abstract

The invention relates to a light emitting diode. The light emitting diode comprises a light emitting diode chip, a packaging layer used for packaging the light emitting diode chip, and multiple first phosphor particles and multiple second phosphor particles which are arranged in the packaging layer, wherein excitation efficiency of the first phosphor particles is lower than excitation efficiency of the second phosphor particles, density of the first phosphor particles is greater than density of the packaging layer, density of the second phosphor particles is small than or equal to density of the packaging layer, the first phosphor particles are arranged at the bottom portion of the packaging layer and are close to the light emitting diode chip, and the second phosphor particles are arranged at the top portion of the packaging layer. The density of the first phosphor particles is greater than the density of the packaging layer, the second phosphor particles having relatively higher excitation efficiency are arranged at the top portion of the packaging layer, the first phosphor particles having relatively lower excitation efficiency settle downwards, are arranged at the bottom portion of the packaging layer and are close to the light emitting diode chip, so probability of the first phosphor particles for being excited by the light emitting diode chip is improved, and thereby the light emitting effect of the light emitting diode is made to be better.

Description

technical field [0001] The invention relates to a semiconductor element, in particular to a light emitting diode. Background technique [0002] Lamps using light-emitting diodes (Light Emitting Diode, LED) as light sources consume 90% less energy than traditional incandescent lamps, which are both energy-saving and environmentally friendly. A light emitting diode in the prior art usually includes a light emitting diode chip and a transparent encapsulation layer encapsulating the light emitting diode chip. In order to improve the light-emitting characteristics of the LED chip, phosphor powder is usually arranged in the LED. Phosphor powder is usually uniformly arranged in the transparent encapsulation layer. However, different phosphors produce different excitation effects under the same excitation light source. For example, the excitation efficiency of nitride red phosphors receiving blue light is lower than that of nitrogen oxide green phosphors. Therefore, distributing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/48H01L33/50
CPCH01L33/486H01L33/504H01L33/508
Inventor 谢雨伦黄哲瑄
Owner ZHANJING TECH SHENZHEN
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