In today’s digital age, many of us spend countless hours staring at computer monitors for work, entertainment, or both. However, this prolonged screen time can lead to eye strain, headaches, and overall discomfort, making it crucial to prioritize a comfortable viewing experience. Enter Flicker-Free Technology, a game-changing solution designed to alleviate the issues caused by screen flickering. In this comprehensive article, we’ll dive deep into the world of Flicker-Free Technology, exploring its benefits and how it can revolutionize your daily screen interactions.

Understanding PWM and Its Drawbacks

To grasp the significance of Flicker-Free Technology, we must first understand the common culprit behind screen flickering: Pulse-Width Modulation (PWM). PWM is a method used by many monitors to regulate display brightness by rapidly turning the backlight on and off. While this flickering is often invisible to the naked eye, it can still cause discomfort and eye strain for sensitive users, especially at lower brightness settings (typically below 20-30% or even 50%).

The rapid on-and-off cycle of PWM can lead to various symptoms, such as:

  • Eye fatigue and strain
  • Headaches and migraines
  • Blurred vision
  • Difficulty focusing
  • Dry or watery eyes

These symptoms can be particularly pronounced for individuals who spend extended periods in front of a screen, making it essential to find a more comfortable alternative.

Flicker-Free Monitors: A Better Alternative

Flicker-Free Technology offers a superior solution to the issues associated with PWM by utilizing Direct Current (DC) modulation to regulate brightness. Unlike PWM, which relies on rapid on-and-off cycles, DC modulation provides a constant stream of light at any brightness level. This eliminates the flickering effect, resulting in a more comfortable and stable viewing experience.

The benefits of Flicker-Free monitors are numerous:

  1. Reduced eye strain: By eliminating the rapid flickering, Flicker-Free monitors minimize the stress placed on your eyes, allowing for more comfortable extended viewing sessions.
  2. Fewer headaches: The stable light output of Flicker-Free monitors can help reduce the occurrence of headaches and migraines triggered by screen flickering.
  3. Improved focus: Without the distraction of flickering, users can maintain better focus on their work or entertainment, leading to increased productivity and enjoyment.
  4. Enhanced color accuracy: Flicker-Free Technology ensures that colors remain consistent and accurate across all brightness levels, providing a more reliable viewing experience for professionals in fields such as graphic design, photography, and video editing.

However, it’s important to note that not all monitors advertised as “Flicker-Free” live up to their claims. Some manufacturers may use the term loosely, so it’s crucial to verify that a monitor truly employs Flicker-Free Technology before making a purchase. Reputable brands, such as BenQASUS, and ViewSonic, offer genuine Flicker-Free monitors that prioritize user comfort and well-being.

Testing for PWM: A Simple Guide

If you’re unsure whether your current monitor uses PWM or want to verify if a new monitor is truly Flicker-Free, there are simple methods to test for flickering:

  1. Online tools: Websites like TestUFO offer online tests that can help detect PWM flickering on your monitor.
  2. Smartphone camera: A quick and easy way to test for PWM is by using your smartphone camera:
    • Set your monitor to a low brightness level (around 20-30%).
    • Open the camera app on your phone and point it at the monitor.
    • If you see scrolling horizontal lines on the screen through your phone’s camera, your monitor is flickering, even if it’s not perceptible to your eyes.

For PWM-sensitive users who own a monitor that uses PWM, there is a potential workaround. Some third-party applications allow you to decrease brightness by altering the graphics card’s white point value while keeping the monitor’s brightness at 100%. However, it’s important to note that this method may impact color accuracy, so it may not be ideal for color-critical work.

PWM Sensitivity and Flicker Rates

Sensitivity to PWM flickering varies from person to person. Some individuals may experience discomfort even at higher brightness levels, while others may not notice any issues at all. Factors such as age, eye health, and overall sensitivity can play a role in how much PWM flickering affects you.

It’s worth noting that PWM is not limited to computer monitors; smartphones and tablets also use this technology for brightness control. However, the PWM frequencies used in these devices can differ significantly:

  • Samsung and Google phones typically use a PWM frequency of 240Hz
  • Apple devices use a higher frequency of 480Hz
  • Honor has implemented an impressive 3,840Hz PWM frequency in some of their devices

Higher PWM frequencies can lead to greater comfort, even when using PWM for dimming. This is because the flickering becomes even less noticeable to the human eye at higher frequencies, reducing the likelihood of discomfort or strain.

Dealing with PWM Sensitivity: Tips and Tricks

If you experience symptoms related to PWM sensitivity, there are several steps you can take to alleviate discomfort:

  1. Visit an optometrist: An eye care professional can help determine if you have any underlying conditions, such as astigmatism, that may contribute to your sensitivity. They can also provide guidance on managing your symptoms.
  2. Adjust your device settings: When using your phone or tablet, try adjusting the brightness to a comfortable level, enabling dark mode, and using blue light filters to reduce eye strain.
  3. Take regular breaks: Implement the 20-20-20 rule: every 20 minutes, look at an object 20 feet away for at least 20 seconds. This helps reduce eye fatigue and promotes healthy blinking.
  4. Consider PWM-friendly devices: If you have severe sensitivity, it may be worth investing in a Flicker-Free monitor or a smartphone with a high PWM frequency to minimize discomfort.

Other Factors Affecting Viewing Comfort

While Flicker-Free Technology is a significant factor in ensuring a comfortable viewing experience, there are other aspects to consider:

  1. Anti-glare screen treatment: Proper anti-glare coatings on your monitor can help reduce reflections and glare, minimizing eye strain and improving overall comfort. Learn more about the importance of anti-glare screens here.
  2. Low Blue Light Technology: Exposure to the blue light emitted by digital screens can contribute to eye strain and disrupt sleep patterns. Many modern monitors feature Low Blue Light Technology, which reduces the amount of harmful blue light emitted without compromising color accuracy. For more information on the benefits of Low Blue Light Technology, check out this article by BenQ.

By considering these additional factors alongside Flicker-Free Technology, you can create an optimal viewing environment that prioritizes your eye health and overall well-being.


In a world where digital screens have become an integral part of our daily lives, it’s essential to prioritize a comfortable and healthy viewing experience. Flicker-Free Technology offers a compelling solution to the issues associated with PWM flickering, providing a stable and comfortable viewing environment for extended screen time.

By understanding the importance of Flicker-Free Technology and how to identify genuine Flicker-Free monitors, you can make informed decisions when purchasing new devices. Additionally, by being aware of your own PWM sensitivity and taking proactive steps to manage symptoms, you can minimize discomfort and maintain optimal eye health.

As you navigate the world of digital displays, remember to prioritize your well-being by choosing monitors and devices that offer Flicker-Free Technology, proper anti-glare treatment, and Low Blue Light features. Your eyes will thank you for it!

What is Flicker-Free Technology and why is it important?

Flicker-Free Technology, also known as Flicker-Less or Anti-Flicker, is a feature that prevents a monitor from using Pulse-Width Modulation (PWM) to control display brightness. This technology is vital in providing a comfortable viewing experience by eliminating screen flickering, which can cause eye strain and headaches, especially for those sensitive to it after prolonged use.

How does Flicker-Free Technology differ from Pulse-Width Modulation (PWM)?

While PWM involves rapidly turning the backlight on and off, causing potential discomfort at lower brightness settings, Flicker-Free Technology uses Direct Current (DC) modulation to regulate brightness. This provides a constant stream of light at any brightness level, eliminating the rapid on-and-off cycle associated with PWM.

How can I test if my monitor uses PWM or is truly Flicker-Free?

To test if your monitor uses PWM, you can use online tools or simply point your phone’s camera at the screen. If the camera shows the screen with scrolling horizontal lines, your monitor is flickering. If your display does use PWM at low brightness, you can download a third-party application that decreases the brightness by altering your graphics card’s white point value, while allowing the monitor’s brightness to be set at 100%, thus avoiding PWM.

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