High color rendering and wide spectrum white light LED light source

Abstract

The invention discloses a high color rendering and wide spectrum white light LED light source. The white light LED light source comprises a fluorescent glue and a blue light chip, the LED fluorescentglue is formed by mixing the phosphor and the silica gel, the phosphor comprises the following components (parts by mass): 0.10-0.50 parts of blue-green powder with an emission peak wavelength of 485-500 nm, 0.15-0.40 parts of green powder with an emission peak wavelength of 530-545 nm, 0.05-0.30 parts of green powder with an emission peak wavelength of 550-557nm, 0.08-0.30 parts of green powder with an emission peak wavelength of 559-565 nm, and 0.01-0.10 parts of red powder with an emission peak wavelength of 620-640 nm. The waveband range of the blue light chip is 447-457nm, the mass ratioof the phosphor and the silica gel is 0.1-0.6:1, the silica gel is formed by a silica gel A and a silica gel B, and the mass ratio of the silica gel A and the silica gel B is 1:0.6-1.5. The LED lightsource is high in energy conversion efficiency, good in color temperature uniformity and free of spots, has a color rendering index of up to 97, is wide in spectral range and is a healthy light source.

Description

technical field [0001] The invention belongs to an LED light source, in particular to a high-color rendering, wide-spectrum white LED light source. Background technique [0002] LED light source is a relatively new technology and lighting source at present, and it has great advantages over traditional lighting sources. The LED light source is environmentally friendly, does not contain heavy metals such as mercury and lead, and saves energy. The lamp made of the LED light source has the characteristics of small size, strong shock resistance, durability, and convenient transportation. [0003] The general white LED light source is usually the light emitted by one or more chips and phosphor powder to form white light, but its light spectrum is not complete, which will cause human visual defects and make human eyes uncomfortable. The human eye is most comfortable viewing objects in sunlight and sees the objects most clearly. The sunlight spectrum range is wide, the color rende...

AI Technical Summary

Problems solved by technology

However, this method requires three or more types of chips to be used at the same time, and there will be many problems that cannot be solved well, such as the high content of short-wavelength harmful blue light, which is not conducive to human eye health, and the spectrum is discontinuous and narrow. , the lighting effect is poor, the luminous efficiency is also very low, and the manufacturing cost is very high, it is not suitable for large-scale industrial production

In addition, in the prior art, violet or ultraviolet LED chips are used to excite phosphors to emit three primary colors, and the excited light is recombined to form white light. However, the price of violet or ultraviolet LED chips is high, and the light decay is also large, which is not suitable for industrial mass production.

In the prior art, blue LED chips are also used to excite one or more photosynthetic white light emitted by phosphors, but the emitted white light has an unstable color temperature or a low color rendering index, and the spectrum of these white light sources is very narrow, which is very irritating to human eyes.

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