Doesn't the projector hurt my eyes?

The projector has become one of the most important tools in daily office work, but using the projector for a long time is definitely very bad for your body, especially the eyes, which will damage your eyes. Because the projector itself will project some blue light, the blue light is quite harmful to the eyes, so it is best not to use the projector frequently.

1. Direct light and reflected light

Nowadays, most TVs are "LED backlight LCD TVs", which use RGB-LED backlight to directly stimulate the human eye, so we call TVs direct light here; while micro projectors use RGB-LED light sources to emit light, which is then projected onto a screen or wall to be seen by the human eye, so the projection is reflected light. In other words, when we watch TV, we stare directly at the light source, and when we watch a projector, we look at the projection reflective surface. Just like reading a book, we look at the reflected sunlight instead of looking at the sun directly. From this point of view, televisions are obviously more harmful to human eyes than projectors.

In order to increase clarity, some LCD screens not only rely on light tubes behind the screen to increase brightness, but also generally use a special "polishing technology" to make the surface of the display look like a piece of glass, which appears very textured and also improves the color contrast and saturation of the screen. However, it also reflects light like glass. Especially when light shines towards the screen, it increases light reflection. Consumers who use this type of display can easily be "hurt" by the light and experience symptoms of eye fatigue, which can gradually lead to health problems such as decreased vision and headaches. The wall projected by the projector will obviously not have mirror reflections like the display screen.

2. Blue light hazards

Speaking of light, this involves the "number one killer of human eyes" - blue light. The full name of blue light is High Energy Visible Lights. We know that light is a kind of electromagnetic radiation, and the radiation to the human body increases with the increase of energy and frequency. Blue light has the highest energy among all visible light. It has a higher frequency and is more harmful than the ultraviolet light that we try to avoid in our daily lives. So it’s not shocking to hear that blue light can cause blindness. This is also one of the biggest reasons for the sharp increase in myopia rates among young people in today's digital age.

Both projectors and TVs use RGB-LED light sources, which are red, yellow and blue LED light sources. Among these three colors of LED, "blue light LED" is the most important. Weakening the blue light will cause color distortion and the overall picture tone will be reddish and yellowish. Let’s take a look at the spectral composition of the two main light-emitting modules of LED displays: W-LED (commonly used) and GB-LED.