KG251QF (144Hz) W-LED back-light technology?

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pet131
pet131 Member Posts: 3 New User
edited February 16 in 2019 Archives
I'm looking for some some more info about the W-LED back-light technology this monitor uses?
The official site is very limited.
https://www.acer.com/ac/en/GB/content/model/UM.KX1EE.F01

Is this a flicker-free or flicker-less monitor?
Or does it use a good old PWM, what is the frequency of the pulses?
Or is it using DC dimming to control back-light?

Any help is very much appreciated,

Answers

  • Rudy21
    Rudy21 ACE Posts: 1,789 Pathfinder
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    pet131 said:
    I'm looking for some some more info about the W-LED back-light technology this monitor uses?
    The official site is very limited.
    https://www.acer.com/ac/en/GB/content/model/UM.KX1EE.F01

    Is this a flicker-free or flicker-less monitor?
    Or does it use a good old PWM, what is the frequency of the pulses?
    Or is it using DC dimming to control back-light?

    Any help is very much appreciated,
    There is no difference between WLED and LED. WLED is just a marketing term that means “White LED”, which is the standard LED in LED displays

    This device has flicker free display.
    Click on 'Yes' to accept my comment as answer
  • pet131
    pet131 Member Posts: 3 New User
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    Thank you so much Rudy21!

    So the KG251QF is an ACER Flicker Free monitor.
    That’s a starting point!
    But also a very “grey area”.

    Based on what I read (and have experienced thus far) this Flicker Free Monitor pulses @1000Hz and is controlled by an PWM (W)Led backlight controller.
    So in essence it’s not flicker free at all.

    I fell into the biggest trap when using a TN panel with this kind of technology.
    I reduced the brightness…
    And I reduced it quit significantly, which had disastrous effects on my eyes.

    Even @1000Hz the intervals between the pulses (on – off) are effecting me when the brightness is set to low values.
    (And I really wonder if there is a threshold where this monitor throttles back to a lower pulse frequency when reducing brightness).

    After 4 weeks of eye-strain I decided to use an old trick.
    I increased the brightness to 100 on the monitor.
    And decreased the contrast in my AMD Radeon setting.
    Things feel much better now.
    And even the twitch in my eyes has gone…
    But it’s still not perfect.
    And spending long time writing and reading on this monitor is not very comfortable.

    As I have experienced so far this is first and foremost a “gaming monitor”.
    The 1ms GTG and 144Hz refresh-rate are no joke!
    And the integration of Freesync is a priceless feature!
    But reducing the brightness and using the KG251QF as an desktop monitor must be the most stupid thing you can do.

    My old ProLite E2607WS-1 (60 Hz. 2ms) which uses CCFL (cold cathode fluorescent lamp) PWN is a lot more friendly to my eyes.
    But for gaming I use this little monster.

    Maybe this is the new (budget) standard?
    1 gaming monitor. And 1 desktop monitor.
    Instead of spending a ton on just 1 monitor that has it all?