The development of color into LED lighting a stumbling block

Japanese color experts warned that the color rendering for LED lighting, plays an important role. If the LED color rendering index number can not be consistent with the results of the human eye to see the results, the future of LED lighting into the application is probably not the opportunity.

Japan Color Research Institute pointed out that due to differences in illumination type will be watching the object, the reflectance is constant, R, G, B for the human eye color form 3 different wavelength sensing reaction, with light and light distribution and change of cognitive differences. The lighting industry generally uses Ra as the average color index to represent the objects displayed in a light color, and in the light of light source color contrast, the higher the Ra value, said color is high, but if the Ra value is lower than 60, said the color standard.

It is worth noting that, when the experiment R, G, B white light LED irradiation of an object, although the wavelength shift, resulting in a significant difference in color rendering index, the human eye can not distinguish the difference.

Japan's color Institute said that the recent industry to take further measures, has formed two different evaluation index standards, but the new evaluation method is controversial. Working group on lighting relevant international standard committee Japan has decided to within two years, according to the new light source color evaluation method is proposed for the new case, how to accurately reflect the human eye identification experiments have become the focus of international concern.

About LED in lighting applications, most of the industry over the past only focus on LED luminous efficiency and cost, but if the LED color standard cannot be consistent with human reach international manufacturers of products specifications will be some unreasonable factors, in addition, can reflect the color photography of color and lighting to see the original doubts.

Source: HC