Light-emitting diode (LED) fluorescent diaphragm and LED illuminating lamp based on LED florescent diaphragm

Abstract

The invention discloses a light-emitting diode (LED) fluorescent diaphragm and an LED illuminating lamp based on the LED florescent diaphragm. The LED fluorescent diaphragm consists of a fluorescent film layer and a supporting transparent diaphragm. The fluorescent film layer is produced through the following steps of: firstly and evenly mixing adhesive with fluorescent powder raw materials to form fluorescent powder colloids, then adopting a printing technology to evenly print the fluorescent powder colloids on a supporting mold or the supporting transparent diaphragm and finally heating and drying or air-drying at room temperature. The LED illuminating lamp is produced through the following steps of: covering and fixing the LED fluorescent diaphragm on a lamp support and reserving a fixed or adjustable cavity with certain distance between the LED fluorescent diaphragm and a chip. The LED illuminating lamp has the advantages that the heat produced when the chip is on and light is emitted is prevented from being directly transferred to the fluorescent film layer, the organic material of the fluorescent powder film layer is enabled not to be heated, degraded or aged on the whole, the LED light out-coupling efficiency is not influenced, the high luminous efficiency of the LED can be kept for a long time, the goals of high efficiency, energy saving and long service life of the illuminating lamp are realized and the illuminating lamp can display patterns and characters.

Description

technical field [0001] The invention relates to an LED lighting fixture, in particular to an LED fluorescent membrane and an LED lighting fixture based on the LED fluorescent membrane. Background technique [0002] In 1993, Japan’s Nichia Chemical Company took the lead in making a breakthrough in blue gallium nitride LED technology and quickly industrialized it. In 1996, it developed a yellow light series of yttrium aluminum garnet phosphors combined with blue light-emitting diodes as a high-efficiency white light source. . It was introduced to the market in 1998 and found a new lighting stage for LEDs. White LEDs have developed rapidly and have shown good application prospects in the field of general lighting. The blue light or ultraviolet light emitted by the semiconductor compound chip belongs to p-n junction electroluminescence, while the yellow light emitted by the phosphor realizes the light energy conversion of blue light to yellow light, which is a typical down-conv...

AI Technical Summary

Problems solved by technology

With the increasing application of high-power chips, this direct dispensing phosphor layer process will lead to increasingly serious heat dissipation problems for LED lamps. The heat is directly transmitted to the phosphor layer coated by dispensing, causing the organic adhesive material to degrade and age due to heat. Gradually darkening the color directly affects the light output rate and limits the luminous efficiency of the LED lamp. When the aging is serious, it may even cause the entire LED to fail to emit light and lose its lighting or display function.

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