A kind of preparation method of composite structure fluorescent glass sheet for LED lighting

Abstract

The invention provides a preparation method of a composite structure fluorescent glass sheet for LED illumination, and relates to the fluorescent glass sheet. The method comprises the steps of (1) mixing fluorescent powder, a binder, a dispersing agent and a coupling agent and carrying out vacuumization and defoamation to obtain fluorescent paste; (2) manufacturing a groove in the glass sheet; (3) pouring the fluorescent paste obtained in the step (1) into the groove of the glass sheet to obtain the composite structure fluorescent glass sheet; and (4) carrying out thermal treatment on the composite structure fluorescent glass sheet obtained in the step (3) and then carrying out annealing to obtain the composite structure fluorescent glass sheet for LED illumination. A fluorescent glue layer can be separated from a chip and is directly compounded with high-transmittance glass, so that the heat radiation capability of an LED chip can be improved; the service lifetime of the chip is prolonged; the performance stability of the chip is improved; irradiation of light emitted from the chip on a fluorescent powder layer with a larger area is also facilitated; and optical parameters of an LED are adjusted by controlling the distance between the chip and the fluorescent glass sheet, and the area and the thickness of the fluorescent glue layer.

Description

technical field [0001] The invention relates to a fluorescent glass sheet, in particular to a method for preparing a fluorescent glass sheet with a composite structure for LED lighting. Background technique [0002] The continuous development of lighting technology makes more and more lighting equipment enter people's daily life. Especially in China, as a country with a large population, it is also a big country in the production and consumption of lighting products. The power consumption for lighting has reached more than 12% of the country's electricity consumption. At present, the main lighting sources in China are incandescent lamps and fluorescent lamps. However, it has disadvantages such as high energy consumption, low luminous efficiency, environmental pollution and short lifespan. White LED (White Light-emitting Diode-White Light-emitting Diode), as the fourth-generation lighting source, surpasses incandescent lamps, fluorescent lamps, etc., and completely overcome...

AI Technical Summary

Problems solved by technology

This structure has obvious disadvantages. For example, poor heat dissipation of the chip will easily cause excessive junction temperature, which will affect the optical performance of the LED chip (such as reduced luminous efficiency, wavelength red shift, reduced luminous intensity, etc.) and reliability (shortened life, color temperature quality, etc.) decrease, etc.); the binder used for phosphor coating is mainly organic binder, and direct contact with the chip will accelerate the aging of the binder and reduce performance stability; it is difficult to control the uniformity of the glue layer during the dispensing process Consistency, unable to control the thickness of the phosphor layer, resulting in significant differences in LED products

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