LED bulb lamp with high color rendering index and high illumination efficiency

Abstract

The invention discloses an LED bulb lamp with high color rendering index and high illumination efficiency, and overcomes the shortage of the prior art. The LED bulb lamp structurally comprises a lamp shell, an LED light emitting module, a radiator, a driving power supply, a lamp body and a lamp cap, and is characterized in that: the LED light emitting module is formed by packaging a plurality of white LEDs prepared from blue light excited YAG fluorescent powder, a small number of white LEDs prepared by adding nitride red fluorescent powder into YAG fluorescent powder and a small number of red LEDs on an aluminum substrate or metal conductive epoxy PCB board; the peak wavelength of the blue light of the white LEDs prepared from the blue light excited YAG fluorescent powder is 455+/-5nm and the half spectral width is 25+/-5nm; the peak emission wavelength of the YAG fluorescent powder is 570+/-10nm and the half spectral width is 150+/-10nm; the peak wavelength of the blue light of the white LEDs prepared by adding the nitride red fluorescent powder into the YAG fluorescent powder is 455+/-5nm and the half spectral width is 25+/-5nm; the peak emission wavelength of the YAG fluorescent powder is 570+/-10nm and the half spectral width is 150+/-10nm; the peak emission wavelength of the nitride red fluorescent powder is 635+/-10nm and the half spectral width is 50+/-5nm; and the peak wavelength of the red LED is 640+/-10nm and the half spectral width is 22+/-5nm. By using different numbers of LEDs, both the color rendering index and the illumination efficiency of the LED bulb lamp are ideal, and the LED bulb lamp can be widely applied to various lighting occasions.

Description

technical field [0001] The invention relates to LED lighting technology, in particular to an LED bulb lamp with high color rendering index and high light efficiency and a preparation method thereof. Background technique [0002] In recent years, in the field of lighting, more and more attention has been paid to energy-saving and environment-friendly lamps, especially LED lighting lamps. LED lighting fixtures have gradually entered people's field of vision due to their long life, stable structure, power saving, no ultraviolet radiation, strong plasticity of lamps, and more beautiful decoration. They are regarded as the fourth generation of lighting sources that replace traditional lighting sources. [0003] With the continuous advancement of LED technology, white LEDs have made great progress in light efficiency, lifespan and cost control, and their application in various lighting fields has been realized. As the best choice to replace incandescent lamps, LED ball running li...

AI Technical Summary

Problems solved by technology

[0005] At present, the existing LED running lights on the market mostly use blue light to excite white light LEDs with YAG phosphor powder in their light-emitting modules. Meet high-quality lighting requirements

There are also LEDs that add a small amount of sulfide red phosphor powder to YAG phosphor powder. Although this type of LED has a high color rendering index, its light efficiency is reduced, and its life is affected by the erosion of sulfide on the LED chip, which also cannot meet the lighting requirements.

Another LED uses nitride red phosphor powder added to YAG phosphor powder. Although the light efficiency and color rendering index of this LED are relatively ideal, the preparation of nitride phosphor powder is difficult and expensive, which greatly increases the cost of this LED. Widely used in LED lamps

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