About improving the color rendering index of white LED lighting
At present, the white LED technology is not mature enough in terms of color rendering, which may become one of the main obstacles restricting LED as a lighting source. The light source has strict requirements on the color rendering index CRI in lighting fixtures. With the continuous development of LED technology, it is possible to use LED as a lighting source.
White light is a composite light, and the light of various colors contained in the white light can be easily decomposed through a prism. The LED is a light source with a more comprehensive color spectrum. This wide color gamut has laid a theoretical foundation for the high color rendering of LED lighting products.
Light is a material with wave-particle duality. This material contains the characteristics of waves and the characteristics of particles, which makes it have strong recombination characteristics. Therefore, in terms of the nature of light and the characteristics of LEDs, It is possible for LEDs to become high-quality lighting sources.
The current white light LED technology mainly adopts the manufacturing process of blue chip coated with phosphor powder, which follows the light-emitting principle of fluorescent tube in a certain sense. This technology has a congenital existence due to the lack of red and green light components. In order to compensate for the shortcomings of insufficient color rendering index, phosphor technology has become the main direction of the industry.
The blue chip is coated with phosphor to make white light technology. This technology can produce white light with better effects in principle. However, due to the weak adaptability to the environment during use, the difference between the theory and the actual product is caused. The difference is largely due to the influence of the LED thermal accumulated temperature on the phosphor.
