8/31/2023 0 Comments Night owl x app flickering screen![]() One is the Oneplus 7pro, and the other is the Oneplus 8T. For example, I have two mobile phones at hand. On the one hand, your body is tired on the other hand, this may be caused by PWM dimming. You will suddenly feel eye swelling and headache when playing games or reading novels on your mobile phone for a long time. However, there is still a chance that brain and retinal tissue can still detect and respond to the flickering, which is manifested by eye fatigue and migraine headache. Therefore, there has been no clear conclusion in electrical and medical circles about the specific safe Hz value of PWM dimming. ![]() ![]() Everyone has a different sensitivity to flickering. Therefore, many people suggest that we should not use smartphones without lighting at night, especially those with OLED screens.īut the problem is that in PMW dimming mode, the brightness of the pixel light source will be maximum as long as it lights up, which is more likely to lead to visual fatigue no matter how high the brightness is. ![]() The lower the brightness of OLED screens, the smaller the frequency of the flickering, and the more significant the impact on human eyes. PWM dimming frequently adjusts the brightness of the screen, which will stimulate nerves and cause visual fatigue. Cells can sense subtle changes in the brightness of light, which drives muscle adjustment. Human eyes can’t detect it, but visual cells can. At present, the flickering frequency of the PWM dimming of OLED screens on many mobile phones is about 215Hz-250Hz. Generally, once the frequency exceeds 80Hz, it is difficult to detect it with the naked eye, and a professional camera is needed to shoot at the screen to discover the flickering. In PWM dimming, if the screen flickers 500 times per second, the frequency of PWM flickering is 500Hz. People mostly criticize PWM dimming for its screen flickering. PWM dimming has many advantages, such as simple structure, no color deviation, power saving, and low heat generation. Many people mistakenly think that the flickering frequency of the screen becomes lower, but the screen is off for too long, resulting in too obvious a black field interval. Under low brightness, our naked eyes will obviously discover that the screen is turned on and off if the screen is off for too long. If the brightness is 50%, the on and off time becomes 50% and 50% in a cycle. If the brightness is 80%, it means the screen is turned on 80% of the time and off 20% of the time in a cycle. If the brightness of the screen is 100%, it means the screen is on for the whole cycle. In that case, people will have the illusion that the screen has become dimmer, which is called the visual persistence phenomenon. For example, suppose the duration of the “off” status is prolonged (the duration of the “on” status is reduced). In this process, the screen does not really become dim or bright. By adjusting the time ratio of “on” and “off”, the screen brightness level can be adjusted from 0% to 100%. ![]() In PWM (Pulse Width Modulation) dimming, the power is not changed, but the screen flickers alternately in a very short time with a specific frequency of “on → off → on → off”. When the frequency is high enough, it can’t be distinguished by the naked eye (so-called PWM dimming). The brightness of OLED screens is controlled by constantly turning on and off of the screen. OLED dimming mode: PWM dimming (pulse wave modulation dimming) However, due to its high frequency, human eyes generally cannot distinguish the flickering. OLED screens are not always on but are on and off repeatedly to control the brightness so that flickering happens. Meanwhile, it can be folded, making it the first choice for flagship smartphones. Have you noticed that if you look at an OLED screen for a long time, your eyes will be uncomfortable, and you will feel dizzy and irritable because OLED screens flicker? Today we are going to discuss why OLED screens flicker. OLED display has high contrast, bright color, and is self-luminous, which is more transparent than LCD display. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |