A kind of manufacturing method of white light LED element containing particle size gradient fluorescent glue

Abstract

The invention provides a method for fabricating a white-light LED component having a particle size gradient fluorescent adhesive, comprising the steps of S1, fixing a substrate having a blue-light LEDchip; S2, disposing a first chamber above the substrate, and applying the fluorescent adhesive containing fluorescent powder having a large particle size to the first chamber to form a first fluorescent adhesive layer; S3, curing the first fluorescent adhesive layer; S4, disposing a second chamber above the first fluorescent adhesive layer, and applying the fluorescent adhesive containing fluorescent powder having a small particle size to the second chamber to form a second fluorescent adhesive layer; and S5, curing the second fluorescent adhesive layer. A white-light LED component manufactured by the method for fabricating the white-light LED component having the particle size gradient fluorescent adhesive can achieve lower fluorescent powder dosage, high lumen efficiency, and uniformity of color temperature distribution at the same color temperature as a conventional process package structure.

Description

technical field [0001] The invention relates to the technical field of LED packaging components, in particular to a method for manufacturing a white light LED component containing particle size gradient fluorescent glue. Background technique [0002] White light LED is a device widely used in indoor and outdoor lighting, automotive lighting, etc. According to the way of generating white light, it can be divided into red, green and blue three-color LED combination type and phosphor conversion type white light LED. [0003] Phosphor-converted white LED is a low-cost, high-efficiency lighting device. Its basic structure is that a mixture of phosphor and silica gel is evenly coated on and around the chip of the blue LED. When the blue LED is lit to produce blue light, the phosphor absorbs the blue light and emits yellow or red light with a longer wavelength through the fluorescent effect. The unabsorbed blue light and the yellow or red light emitted by the phosphor are superimpo...

AI Technical Summary

Problems solved by technology

However, due to its relatively weak scattering characteristics, the color temperature of white LEDs using large particle size phosphors is not uniform, and the amount of phosphors required to achieve the same color temperature is relatively large

On the contrary, phosphors with small particle size have low lumen efficiency, uniform color temperature, and low material consumption

At present, the production method of white light LED is usually uniform mixing of the same kind of phosphor powder with the same particle size. It is difficult to achieve uniform color temperature distribution, high lumen efficiency and low phosphor material consumption at the same time.

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