Lennon
Member
Taking the current mainstream LCD TV as an example, its luminous principle is very similar to that of the sunlight. The sunlight is white with our visual sense of the naked eye. Through the decomposition of the sunlight through a prism, we can see that the white light is composed of red light, green light and blue light. Generally speaking, the principle of liquid crystal luminescence as we understand it is that the white light emitted by the LED shines on the liquid crystal module and scatters out the RGB primary colors, thus presenting a rich and colorful color. None of this seems to have anything to do with what we call harmful blue light, but what we don't know is that harmful blue light comes from LED beads.
We all know that the nature of light is composed of a variety of different color spectrum, but different wavelength is presented on the vision of different colors, such as in the 600 ~ 700 nm wavelength light, we see a red light, 500 ~ 600 nm light, we see the yellow light, and blue light is between 400 ~ 500 nm wavelength light.
Physics research shows that the shorter the wavelength, the higher the energy, the stronger the penetration. Blue light has a relatively short wavelength, so people are very concerned about the harm of blue light to human eyes. At present, we are moving towards the era of "everything is on display", and we can't live without screens. TV, mobile phone, tablet and so on have become the electronic products that we must use every day. And the led-based screens, whose light peaks in this short-wavelength blue light, do more damage to the eye the longer you look.
In contrast, OLED technology, which is maturing gradually, is free from LED backlight mode and each pixel can emit light by itself. As long as voltage is input into the electrode, the excitation layer can produce the required color light. The intensity of blue light spectrum is greatly reduced by the organic luminescent materials. At present, the blue wavelength of LCD TV on the market is about 450 nanometers, while the blue wavelength of OLED TV is between 460 and 480 nanometers. According to the physical principle of "the shorter the wavelength, the higher the energy", OLED TV produces less energy than the blue light of LCD TV, so the harm to human eyes is less.
