PWM (pulse-width modulation) on Acer Aspire 7 A715-76G-560W. Is it flicker-free monitor?

Jedi
Jedi Member Posts: 3 New User
edited April 23 in Aspire Laptops

As per Aida 64 info, I have CMN N156HCA-EAB panel (Monitor ID CMN15E7). I'm need to know if any PWM (pulse-width modulation) as a method of regulating brightness is active on my monitor at any frequency? If positive what are the the frequencies where PWM is active and percentage? 
I’ve downloaded specification from panel-related website, it’s rather technical but I’m not a technician.  
If this matters, I have this panel installed on my laptop:

Acer Aspire 7 A715-76G-560W (NH.QMMEU.002)

I absolutely need to know if my monitor is flickering (and how much if positive) or is it flicker-free. 

[Edited the thread to add issue detail]

Answers

  • Sharanji
    Sharanji ACE Posts: 5,112 Pathfinder

    @Jedi

    The Acer Aspire 7 A715-76G-560W CMN N156HCA-EAB panel Monitor ID CMN15E7 is known to use PWM Pulse-Width Modulation for brightness control, but it operates at a very high frequency of 26,000 Hz. At such a high frequency, PWM is generally considered safe for most users, as it minimizes the risk of flicker-induced eye strain. You can use it for long hours of work without experiencing the negative side effects of screen flicker.

    I hope this helps! If this was useful, please hit 'Yes' or 'Like'! Thanks! 😊

  • Jedi
    Jedi Member Posts: 3 New User

    Thank you. I've been searching for PWN info quite long. Not many findings in the result. Can you please provide a link or attach a document showing 26,000 Hz is the only frequency this panel uses PWM for brightness control?

    Should it be understood like this: this panel flickers (blinks) 26 000 times per second?

  • Sharanji
    Sharanji ACE Posts: 5,112 Pathfinder

    @Jedi

    Yes, the panel operates at a high frequency of 26,000 Hz, it means that the Pulse-Width Modulation used to regulate the screen's brightness flickers at an incredibly fast rate—26,000 cycles per second. This frequency is so high that it is virtually imperceptible to the human eye, reducing the chances of visual discomfort or strain caused by flicker. As a result, even if PWM is active, the user experience remains smooth and comfortable, as the flicker effect does not interfere with the perception of the display.

    Lower PWM frequencies, by contrast, can cause visible flicker and lead to symptoms like headaches or eye fatigue for sensitive users. The panel's high-frequency PWM makes it more suited for extended usage periods.

    I hope this helps! If this was useful, please hit 'Yes' or 'Like'! Thanks! 😊

  • Jedi
    Jedi Member Posts: 3 New User

    Thanks. I've found different reviews om this. For example this one from reputable Laptop Media found no PWM at any brightness level:

    https://laptopmedia.com/review/acer-aspire-7-a715-76g-review-good-all-rounder-that-can-be-used-even-for-gaming/p3/

    "Acer Aspire 7 (A715-76G)’s display doesn’t flicker at any brightness level".

    But this one says "on the other hand, it’s just average in terms of brightness or color, and it uses PWM modulation throughout the entire brightness range".

    https://root-nation.com/en/gadgets-en/laptops-en/en-acer-aspire-7-a715-76g-review/

    So the information about PWM is rather limited and contriversial.

    Can you please provide a source of information where this panel has ONLY 26,000 Hz PWM? Ideally you can attach a document or provide a link.

  • Sharanji
    Sharanji ACE Posts: 5,112 Pathfinder

    @Jedi

    For more detailed and accurate information about the PWM frequency of the Acer Aspire A715-76G, I recommend reaching out directly to Acer's technical support. They should be able to provide any official documentation or further insights to address your query. You can find their contact details and support options on Acer's official website Acer Support

    .

    I hope this helps! If this was useful, please hit 'Yes' or 'Like'! Thanks! 😊