Does the ink screen really have eye protection effect?

Speaking of ink screen, we all know that ordinary e-books will use it. Good reading experience, feeling of reading paper books, saving electricity and protecting eyes. So why can an ink screen protect your eyes? Let's take a closer look at the characteristics of ink screen.

1. Ink screen is an eye protection screen, and there is nothing to question. It has only one advantage, that is, eye protection, and other display characteristics are poor. It can be said that there is no value without eye protection, so on the other hand, people who question whether the ink screen protects their eyes can shut up, and his value is only eye protection.

2. The previous ink screen equipment didn't have a light source device, but because its principle is ambient light illumination, that is, reflection principle, it can't be seen in weak light or even dark environment, so the front light is added to make it visible.

3. The reflection principle determines that the stronger the light, the clearer the background color, so it is completely crazy to turn on the stronger front light when the ambient light is stronger. Ink screen is called paper. Have you ever seen a paper book glow automatically?

4. Many people think that the ink screen is the front light and the backlight. I just want to say that the visual principle of the ink screen is the reflection principle, and the backlight is reflective and does not need to be disassembled. It must also be the emission effect brought by the light in front of the screen, but many people will not wonder why the look and feel is completely different from the sunlight, and is it more like a light box at night? This is not surprising at all. Although this light guide plate is the front light of the screen, it is also the light source between the human eye and the screen, so direct light will inevitably enter the eyes. Eyes are most afraid of the direct light of active light source, even the faint candlelight. Do you dare to stare at it all the time?

5. It is precisely because the front light is also an active light source that people's pupils will be enlarged in the dark environment, which leads to the contradiction that even the light guide plate will feel bright when we look directly at the lowest brightness. When the light guide plate is not bright enough to illuminate the screen, the reflection effect is also reduced, which leads to the decline of font recognition. On the one hand, the active light is dazzling, on the other hand, it is even more dazzling when it is unclear, so the effect of the front light can be imagined. However, headlights are necessary because you can't see without them. In single-screen applications, the front lights must be available no matter how bad the effect is. This is a question of whether you can see it or not, and the comfortable look and feel can only follow.

6. Many people who defend the front light actually need two points. The first is the non-interference property at night, and it has its own light source, which will not disturb the people around, because even a desk lamp can illuminate an area and affect the rest of others. This makes it the primary consideration for you to study alone at night when you live in a dormitory and your family needs rest. Therefore, to use the front light, the second effect is that any object will reflect light, so you don't need to find an angle to avoid it. Point light source is easy to form reflective points, even if frosted film is attached, it can only passivate the reflective points. Some people will find it very troublesome if they don't understand this principle, but after turning on the headlights, because they are also light sources, some glare will be offset. Actually, it's not that difficult to find an angle. The basic simple geometry is that the incident angle is emitted symmetrically in the vertical direction as long as the eye direction is far away. Therefore, when the position of the person and the screen is determined, the lighting angle of the desk lamp can be fixed.

7. The so-called front light that competes with ambient light is a joke. You want to compete with the sun, just your low-power LED light source? The stronger the light, the whiter the background color of the electronic paper book will appear, and the color development has a great relationship with the color temperature of the light itself. This is the reason why passive reflective objects protect the eyes.

8. Remember a principle that will always be effective. The premise of any eye protection equipment is that it can't be an active light source. All experts say that the harmful blue light with short wave and high energy contained in the white light of LED lamp is the way to avoid its harm. Of course, no one will stare at such bright light, and human instinct will protect themselves. Can you stare at even the weakest flashlight? Eye protection must be a non-luminous object. When the ambient light is strong, things that are too white will hurt your eyes. There is a simple reason. You can only see white because you reflect all the light.