Full-spectrum LED light source and LED lamp

Abstract

The invention provides a full-spectrum LED light source and an LED lamp. The full-spectrum LED light source comprises an LED chip and fluorescent powder. The LED chip emits blue light with at least one wavelength, and the wavelength of the blue light is 440-470 nm; the fluorescent powder comprises first red fluorescent powder, second red fluorescent powder and green fluorescent powder, the periphery of the LED chip is coated with a mixture of the first red fluorescent powder, the second red fluorescent powder and the green fluorescent powder to form a full spectrum, the emission wavelength ofthe first red fluorescent powder is shorter than that of the second red fluorescent powder, and the green fluorescent powder is LuAG fluorescent powder. According to the invention, the real color of an object can be better restored, and the health of human eyes is better facilitated; through setting of different proportion formulas, simulation of sunlight in different time periods is achieved, thesimilarity Rf with sunlight is larger than 90, the fidelity and saturation are close to those of sunlight, health and comfort are achieved, common materials on the market are used, the price cost islow, the thermal stability is high, and manufacturing process management and control are easy.

Description

technical field [0001] The invention relates to the field of LED lighting, in particular to a full-spectrum LED light source and an LED lamp. Background technique [0002] The spectrum of sunlight may be referred to as the full spectrum. Full spectrum refers to the spectrum that includes ultraviolet light, visible light, and infrared light in the spectrum, and the ratio of red, green, and blue in the visible light part is similar to that of sunlight, and the color rendering index Ra is close to 100. The color temperature changes with the four seasons and the time of day and night. Therefore, the spectrum of the full-spectrum lamp should change the color temperature with time to simulate the natural light environment, so as to be more in line with the natural growth law of organisms. Therefore, the development of full-spectrum LEDs similar to natural light has become the focus of research by researchers at home and abroad. [0003] At present, there are four main ways to re...

AI Technical Summary

Problems solved by technology

However, the improvement of the saturated blue index (R12) has always been a problem that plagues full-spectrum LED technology.

It is mainly manifested in the following three points: First, LED full-spectrum technology will add nitrogen oxide green phosphor powder located in the 490-500nm band in order to increase the R12 value. Reliability; secondly, the current excitation efficiency of phosphors in this band is too low, which makes it difficult for each parameter in R9-R15 in the existing full-spectrum LED to reach more than 95; and the cost of materials is high; the cost of process management is high

Images