Risk-free PWM dimming technology is a type of pulse-width modulation (PWM) dimming that is considered to be safe for the eyes, even at low brightness levels. This is in contrast to traditional PWM dimming, which can cause eye strain and discomfort in some people, especially when used at low brightness.
How does it Work?
Risk-free PWM dimming technology works by using a very high frequency (e.g., 3840Hz) to reduce or eliminate the flickering. At this frequency, the flickering is too fast for the human eye to perceive, and it does not cause eye strain.
This technology is still relatively new, but it is becoming increasingly common in high-end smartphones and other devices. It is a valuable feature for anyone who uses their devices for extended periods of time, especially in low-light conditions.
Why it is called Risk-free?
Risk-free PWM dimming technology is called risk-free because it uses a very high frequency (3840Hz or higher) to reduce or eliminate the flicker. This frequency is too high for the human eye to detect, so there is no risk of eye strain.
Benefits of Risk-free PWM dimming technology
It is a promising technology that has the potential to significantly improve the eye comfort of users of digital devices. Some benefits of risk-free PWM dimming technology include:
- Reduces or eliminates eye strain and discomfort
- Improves visual comfort
- Reduces flicker-induced headaches
- Enhances image quality
- Extends battery life
The IEEE Standards
The IEEE Std 1789-2015 standard defines risk-free PWM dimming as any PWM dimming scheme that operates at a frequency of 3125 Hz or higher. However, some manufacturers, such as HONOR, have developed risk-free PWM dimming schemes that operate at even higher frequencies, such as 3840 Hz.
Advantages over traditional PWM dimming
- It is safer for the eyes, especially at low brightness levels.
- It can be used to achieve a wider range of brightness levels.
- It is more efficient, which can help to extend battery life.
Overall, risk-free PWM dimming technology is a significant improvement over traditional PWM dimming technology. It offers a number of advantages, including improved eye protection, wider brightness range, and greater efficiency.
Devices using this Technology
The HONOR 90 5G is the first smartphone to feature risk-free PWM dimming technology. It uses a 3840Hz PWM dimming frequency to ensure a flicker-free viewing experience.
- The HONOR 90 uses a 3840 Hz PWM dimming scheme, which is significantly higher than the IEEE Std 1789-2015 standard of 3125 Hz. This means that the HONOR 90’s display is flicker-free, even at low brightness levels.
- The HONOR 90 also uses a dynamic light that resembles a natural light rhythm to stimulate ciliary muscle movement. This helps to alleviate eye fatigue by as much as 18% by increasing blood circulation in the ciliary muscle.
Conclusion
Risk-free PWM dimming technology is particularly beneficial for people who use digital devices for long periods of time, such as gamers, students, and office workers.
Further Readings
- Learn about Flicker first: https://en.wikipedia.org/wiki/Flicker_(screen)
- https://en.wikipedia.org/wiki/Pulse-width_modulation
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One thought on “What is Risk-free PWM Dimming Technology?”
Hey, Thanks for this knowledge. I always used to wonder what is this new buzzword. One quick question though – Is it just the hardware or it can be controlled by the Software too?