White LED light source and LED lamp comprising same

Abstract

The invention provides a white LED light source and an LED lamp comprising the same. The spectrum of the white LED light source has a first spectrum peak in the wavelength range of 459-495nm and a second spectrum peak in the wavelength range of 400-450nm; a trough exists between the first spectrum peak and the second spectrum peak; and the white LED light source excites the fluorescent powder to emit light through a dual-wavelength blue light chip, so that the blue light hazard of the spectrum is remarkably reduced, the color rendering property is improved, and R6, R12 and the color fidelity Rf are improved. Meanwhile, the physiological effect is achieved, people feel comfortable and are facilitated to concentrate, and the learning and working efficiency is improved. The white LED light source is high in fitting degree coefficient of the spectrum and the same-color-temperature solar spectrum, has the advantages of being excellent in light color quality, low in blue light harm, high instability and low in cost, and can fully meet the performance requirements of the LED light source in the field of illumination.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials and devices, and in particular relates to a white LED light source and an LED lamp containing the same. Background technique [0002] White LED (Light Emitting Diode) is a new type of lighting source. Compared with traditional incandescent lamps and fluorescent lamps, it has the advantages of environmental protection and energy saving, short response time, and long life. It shows great application prospects in the lighting market. In recent years, the application field of white light LED has been increasingly developed, and the research and development efforts have been increased. In addition to being widely used in general lighting, it also occupies an important position in professional lighting fields such as color detection, plant growth, and photographic lighting. [0003] According to the principles of luminescence and chromaticity, the ways to realize white LED light emission a...

AI Technical Summary

Problems solved by technology

[0005] However, the white light LED spectrum disclosed in the prior art has a relatively high content in the 415-460nm band, which corresponds to the band with a blue light hazard content amplitude of 80% and above, so blue light is extremely harmful

Moreover, most white LEDs rely on the use of a large amount of red powder to improve the color rendering index, and actually form a trough in the 465-495nm band, R6 and R12 are not high, the color fidelity Rf is low, and the color is not bright enough; there are also LED light sources that increase the emission peak to Blu-ray phosphors are used to make up for the lack of waveforms at 465-495nm. Although the color rendering index has improved, it cannot reduce the harm of blue light.

In addition, the use of violet light to excite red, green, and blue primary color phosphors has a good performance in reducing the harm of blue light and improving the color rendering index, but the cost of violet light chips is high, and the phosphor components matched with it are complex and inconvenient to operate. Moreover, long-term exposure to purple light has high requirements on the material of the bracket and is prone to attenuation, so it is not conducive to large-scale promotion

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