Now everyone's work and life are increasingly inseparable from electronic devices. The life of a typical urban white-collar worker is to go to work and look at the computer, and watch the mobile phone after work. It is normal to have 8 to 10 hours a day watching the screen. Then use mobile phones, LCDs and everyday every day.Which OLED screen is more eye-catching?
We can say that these two screens hurt the eyes.
LCD screen - shortwave blue light damage
Today's LCD screens are illuminated with LED backlights. Since the backlight requires a white light effect, the industry usually uses a blue LED to mix a yellow phosphor to form white light. Therefore, the illumination of such a screen itself is difficult to avoid "short-wave blue light". The blue light has a short wavelength (the wavelength is usually below 450 nm), the energy is relatively high, and the penetrating power is strong.
When such blue light passes through our eyes, the lens in the eye will attract some of the blue light (while the lens will gradually become cloudy to form a cataract). However, most of the blue light can penetrate the lens to reach the macular area on the retina, which damages the visual cells of the macular area. This kind of damage is irreversible, so there is a saying that "blue light hurts the eye" on the Internet.
Moreover, this kind of injury is the most harmful to children. The children's lens is clearer and the blue light is easier to penetrate. Therefore, parents should pay attention to the time when children use electronic devices, and try to avoid watching mobile phones and tablets for a long time (almost all tablets including ipads are LCD screens)
Eye protection mode for LCD screen
The role of the eye protection mode is to achieve the purpose of eye protection by weakening or filtering out the blue light of this part of the band. When the eye protection mode is turned on, the screen will turn yellow at once. This is because after the blue light is missing, red + green = yellow, so the screen appears yellow.
Turning on the eye protection mode is really helpful for filtering blue light. However, the data prove that the eye protection mode of different brands of mobile phones is not consistent with the filtering rate of Blu-ray. The Blu-ray filtering rate of some brand mobile phone eye protection modes is actually not ideal.
And the degree of yellowing of the eye-protection mode screen is also inconsistent, and not everyone can accept such a yellowish screen. Therefore, the author believes that it is better to protect the eyes than to protect the eye mode when playing for a while.
Blu-ray hazards not only exist on mobile phone screens:
In fact, as long as the use of blue LED mixed yellow phosphor to form white light has blue light hazard, computer monitors, fluorescent lights, mobile phones, digital products, displays, LEDs and other light have short-wave blue light. But we usually stare at the computer display and the mobile phone screen with a long time. So this kind of equipment is the biggest loss to our eyes.
Short-wave blue light will not only harm our eyes
All short-wave blue light also affects sleep. The human body inhibits the secretion of melatonin under the illumination of blue light, and melatonin is an important hormone that affects sleep. The known effect is to promote sleep and adjust the time difference. Of course this is a digression.
OLED screen - strobe damage
Compared to LCD screens, OLED displays use a self-illuminating design with independent pixels, eliminating the need for a backlight. So the amount of blue light is much less. Moreover, the blue light band generated by the OLED display is mainly concentrated at 460 nm, the energy is relatively small, and the damage to the human eye is much less. At least in the current data, the blue light of the OLED screen does not pose a hazard to the human eye.
But this does not mean that you can buy a OLED screen phone to get everything right, in fact, the OLED screen also has its fatal flaw - strobe problem.
Because the screen needs to control the brightness. For the LCD, we can control the brightness directly by adjusting the voltage of the backlight layer, and the OLED will have uneven chromatic aberration (jelly effect) at low voltage, which has been plaguing the early OLED screen. But then OLED manufacturers solved this problem with a low-frequency flash. The principle of this technology is to reduce the brightness by reducing the switching frequency of the OLED screen source.