When the blue LED was first used in consumer electronics and computer components, everyone thought its effect was too dazzling because it was unique at that time. Nowadays, when we are no longer fresh about blue LEDs, LEDs expose many problems that annoy users. Today, a booklet about various problems of blue LED has appeared abroad, which exposes the possible harm that this product brighter than red and green LED may bring to people.
"Because of the longer wavelength, blue brings more discomfort to people than the green and red mentioned above," said Dr. David sliney, an expert in military health protection and preventive medicine in the United States.
Sliney continued that the human eye lens system can not focus the blue light sensitively. Unlike the red and green light can focus on the retina accurately, the focusing position of the blue light will be slightly ahead of the retina, which leads to the unique halo of the blue light. Moreover, blue spreads more widely than other colors when passing through the eyeball. Dense blue electro-optic sources are particularly likely to cause the above situation, such as blue, which will spread on the retina and then interfere with other parts of the scene. This is what we often call dispersion "The short wavelength of blue has a larger refraction angle than that of red or green. It has been proved that human beings are quite sensitive to blue light in black environment, so blue LED may not be suitable for home theater equipment and computer products in bedroom, because their light intensity is too stimulating to human eyes. Therefore, experts still suggest that people should not choose to wear it as much as possible Electronic devices with blue LED lights should at least wait until low brightness blue LEDs are developed, but it is estimated that by that time, red and green will become popular again?
