360-degree complete cycle type LED lamp filament based on purple light chips

Abstract

The invention discloses a 360-degree complete cycle type LED lamp filament based on purple light chips. The 360-degree complete cycle type LED lamp filament based on the purple light chips is composed of a substrate, the chips, transparent silica gel, inorganic nanoparticles and phosphor gel; the phosphor gel is formed by organic silicon resin, multicolor phosphor and coupling agents through an injection moulding process, and is arranged on the outer side of the transparent silica gel. The chips are the purple light chips, the emission wavelength range is 360-410 nm, the chips are fixed to one face or the obverse side and the reverse side of the substrate, the inorganic nanoparticles are TiO2 or ZrO2, the particle size is 10-100 nm, the inorganic nanoparticles are distributed in the transparent silica gel, the multicolor phosphor is red, green and blue mixed phosphor of a phosphate or silicate system, and the coupling agents are silane coupling agents. The 360-degree complete cycle type LED lamp filament based on the purple light chips has the advantages of being high in color reduction degree, even and soft in light color, capable of emitting light by 360 degrees, high in light emitting efficiency, and the like.

Description

technical field [0001] The invention relates to a 360° full-circle light-emitting LED filament based on a purple light chip, which belongs to the field of semiconductor lighting. Background technique [0002] LED lighting is considered as the fourth-generation lighting product due to its own advantages such as high luminous efficiency, long life, energy saving and environmental protection, and fast response. It is currently more and more widely used in the field of lighting. [0003] At present, the mainstream white light LED in the market is realized by blue light chips exciting YAG yellow phosphor, but the red part of the white light spectrum prepared by this method is missing, the color reproduction of the light source is low, and the color rendering index of simply adding red powder is difficult to exceed 95. , which seriously restricts the development of LEDs to high light quality; at the same time, whether the light source prepared in the current packaging form is a si...

AI Technical Summary

Problems solved by technology

[0005] (1) As in patents CN103035820A and CN103035823A, the LED filament still adopts blue light to excite YAG yellow phosphor to produce white light, and the prepared filament still has the problem of low color reproduction

[0006] (2) For example, in the patent CN103700651A, during the packaging process, the traditional method of directly coating the phosphor powder glue on the surface of the chip is adopted. When the prepared filament is lit, the phosphor powder is easily affected by the heat of the chip, resulting in attenuation of the phosphor powder. Affect the service life of the light source

[0007] (3) As in the patent CN203589021U, the fluorescent powder glue is only coated on both sides of the substrate, and the filament is easy to leak blue light from the side of the substrate when it is lit, resulting in uneven color

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