Front Service LED Display Optical Security Analysis
1, light security classification
In general, light safety can be divided into the following two categories, namely photobiosafety and interference light.
The main research areas of this type of light safety include ultraviolet, infrared, blue light and visible radiation damage to human tissues. Common photobiological hazards mainly include photochemical UV damage to human skin and eyes, blue light damage to human retina, infrared coating damage to the eyes, and photothermal damage to the skin.
Among all the sensory organs of the human body, the eye is the most important part. Its self-repair ability is relatively weak. Once exposed to external optical radiation, it will cause irreparable damage to the eyes. Even visible light may harm people. Eyes, such as short-wavelength blue light, can cause photoreceptor cell damage in the retina. In severe cases, pigment epithelial function may be degraded, and high-intensity irradiation may cause thermal damage to the retina.
Interference light is divided into direct and indirect. The former refers to the direct decrease of visual resolution caused by the illuminant with higher brightness in the field of view. The latter means that the illuminant does not appear directly in the field of view, but the light projection After the surface of the object is reflected, it enters the problem caused by the human eye.
After investigating some Front Service LED Display manufacturers in China, the maximum brightness of Front Service LED Display is 6 000~8 000 cd/m2. This value does not reach the minimum brightness value of photobiosafety problem. Service LED Display does not cause photobiohazards to human retinas including blue light hazards. In view of this, the following powerful color highlights the interference light problem of the Front Service LED Display.