As HDTV sets have already become the standard household appliances for ordinary families, “blue light harm” is an unavoidable topic. Most people don’t know that short wave blue light can hurt the eyes for a long time, and it is easy to see eye diseases such as vision decline, dry eyes, tears or even cataract. It is very important to correctly recognize the “blue light harm” in various products and technologies.
“Blue light hazard” is a chronic process but irreversible
The white light we see in our daily life is actually composed of red, yellow, blue and other visible light. The wavelength of red light is 600-700nm, the wavelength of yellow light is 500-600nm, and the wavelength of blue light is 400-500nm. The shorter the wavelength, the higher the energy, and the stronger the penetration. So what we feel dazzling is often blue light with short wavelength and high frequency band. It can even penetrate the cornea and lens to reach the retina. At the 2010 International Optical Association annual meeting, the world’s leading optical experts also agreed that short wave blue light has high energy, and can penetrate the lens to the retina.
“Blue light damage” is a chronic process that is not easy to detect. What many people feel is dry eyes and all kinds of discomfort. However, the damage to the macular area at the end of the eyeball is enough to affect people’s life. Also need to pay attention to is that high frequency blue light damage to the eyes is irreversible.
Different technology principle, different big screen “blue light harm” is also very different
As the mainstream display product of family entertainment center, LED’s ultra-thin, high definition, wide color gamut, small delay and other advantages also benefit millions of families. But “long time, close viewing is not comfortable” has been one of the main problems that plagued the industry and users. The white light in LED display screen is mixed by blue LED chip, red LED chip and green LED chip. There is a strong blue band in the spectral energy, and the blue energy is relatively high. Human eyes directly receive the blue light stimulation of small space led for a long time, which is easy to cause retinopathy..
What is the principle of “blue light proof” technology
Based on this characteristic of LED, “anti blue light” is also one of the urgent tasks in the industry. It needs to be clarified that not all blue light will reach the retina, but there is an energy peak at the wavelength of 450nm, and the blue light around it is harmful blue light.
Therefore, we only need to change the light around 450nm wavelength to avoid harmful blue light. Taking Philips “Shushi blue” technology as an example, it can effectively reduce the blue light generation below 455nm by changing the LED emission wavelength, so as to achieve the purpose of reducing the damage of blue light.
Different from the software anti blue light will make the HdTV color temperature change, color yellow, and the film anti blue light block a small part of blue light, Philips Shushi blue technology changes the blue light wavelength from the hardware aspect, so as to avoid the reduction of screen brightness and color distortion caused by other anti blue light technology due to less blue light.
So, how to identify whether a HDTV is a real anti shortwave Blu ray HdTV?
My suggestion is: to see if the products launched by this enterprise have obtained the safety certification of the authority. Taking Philips Shushi blue technology as an example, it has been certified by the authority of Chinese patent law. This technology has been applied in Philips puf6650 / t3-s model, and 4K HDR intelligent image quality optimization technology has made this product not only blue light proof, but also excellent image quality performance.