Magicnation Forum

Heya Explorers 
This is Tej, back with another buzzing topic to be discussed in our Tech Roundtable VOL. #7. Y'all might have heard about the term “PWM Dimming”, especially after the launch of HONOR 90, when HONOR had set the benchmarks of displays with high PWM Dimming, which proved to be safe for our eyes in long term usages! But what actually is PWM Dimming?? 

PWM dimming, or Pulse Width Modulation dimming, is a technique used to control the brightness of displays by rapidly switching the backlight on and off at a high frequency. This method is particularly effective for OLED and AMOLED screens, where each pixel generates its own light. By adjusting the duty cycle—the proportion of time the backlight is on versus off—PWM can achieve a wide range of brightness levels while maintaining energy efficiency. This precise control allows for smooth transitions between brightness settings, preserving color accuracy and contrast. 

Is High PWM Dimming Important in Smartphone Displays? 

To understand the importance of High PWM Dimming in our smartphones, here I have listed 6 points that justify its importance… 

1. Energy Efficiency

High PWM dimming is known for its energy efficiency, which is a significant advantage in battery-powered devices like smartphones. By rapidly switching the display on and off, PWM can effectively control brightness without consuming much power. This method is particularly beneficial for OLED and AMOLED screens, where each pixel emits its own light. Since power consumption directly affects battery life, high PWM dimming helps in prolonging the time between charges, enhancing the overall user experience.

2. Reduced Flicker Perception 

​​​​​​At low PWM frequencies, the switching on and off of the LED can be noticeable, causing a flickering effect. Flicker can lead to eye strain, headaches, and discomfort, especially in sensitive individuals. High-frequency PWM (usually above 1 kHz) reduces or eliminates the perception of flicker, making the light appear steady to the human eye. 

3. Minimized Eye Strain 

 Flicker can contribute to visual fatigue, particularly during prolonged exposure. By using high-frequency PWM dimming, the risk of eye strain is reduced, promoting better visual comfort and preventing issues like headaches and dry eyes.

Children and individuals with certain medical conditions (e.g., epilepsy) may be more susceptible to the negative effects of flicker. High PWM frequencies can help mitigate risks associated with these groups. Also high PWM dimming frequencies help create a more stable light environment, which can contribute to better sleep quality.

 

4. Better Concentration and Productivity

Stable lighting conditions without noticeable flicker can improve concentration and productivity, especially in work and study environments. Flicker-free lighting is essential in settings like offices, schools, and homes where people spend extended periods. 

5. Consistent Performance Across Different Brightness Levels

High PWM dimming ensures consistent display performance across various brightness levels. Unlike some other dimming techniques that may affect color accuracy or contrast when reducing brightness, PWM maintains the integrity of the display's visual output. This consistency is vital for users who rely on their smartphones for professional tasks that demand reliable display quality, such as photo editing or video production. 

6. Enhanced Durability

PWM dimming can contribute to the longevity of smartphone displays. By managing the power supplied to the screen efficiently, high PWM dimming reduces the thermal stress on display components. Lower thermal stress can prevent premature degradation of the screen, leading to a longer lifespan for the device. Users benefit from a more durable smartphone, reducing the need for frequent replacements and supporting sustainability efforts. 

In summary, high PWM dimming in smartphones offers significant advantages in terms of energy efficiency, precise brightness control, eye safety, sleep cycle, consistent performance, and enhanced durability. These benefits make it a preferred choice for manufacturers and users alike.
 Wait…. There's something more! The upcoming HONOR 200 Series, which is launching today, ensures that it is one of the safest smartphones for your eyes with its HONOR Eye Comfort Display that has 3840Hz Risk-Free Dimming & Dual Sensor Adaptive + Dynamic Dimming Display! Hence you need not to worry for the safety of your eyes unless you have an HONOR 200 Series device. 

Till then
~Tej Dave
 

good information
 

Thanks to honor for thinking about our eyes.
Excited for honor200

Great read, Tej! Your detailed explanation of PWM dimming and its benefits is very enlightening. It's impressive to see how high PWM dimming contributes to energy efficiency, eye comfort, and overall display performance. The HONOR 200 Series sounds like a game-changer with its advanced Eye Comfort Display and high-frequency dimming. Kudos to HONOR for prioritizing our eye health. Can't wait to see the new series in action.

Great