this post was submitted on 18 Feb 2025
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[–] [email protected] 10 points 4 days ago (2 children)

3,840 Hz refresh rate

Is that an American or European comma?

[–] [email protected] 4 points 4 days ago

Maybe they mean horizontal scan rate?

[–] [email protected] 3 points 4 days ago (1 children)
[–] [email protected] 4 points 4 days ago (1 children)

A comment from a crosspost ( [email protected]) suggests it as the PWM rate of the LEDs

[–] [email protected] 3 points 4 days ago

Which on a very... Marketing level could be described as refresh rate... I assume??

That would make way more sense from the pure figure perspective, thanks!

[–] Godnroc 3 points 3 days ago (1 children)

Did some investigating on that refresh rate number, it looks like the LED panels use something called Scrambled Pulse Width Modulation (S-PWM). From the little I can understand, it just seems to be a method of splitting and offsetting the PWM signal.

It's unclear to me if that means that a single pixel could be updated 3,840 times in a second or if the entire display collectively updates that much.

Playing with some math, if you had 4 sub-pixel LEDs updating at 120hz and separated into 8 sections across the entire panel that was each offset in time by some fraction, you could say there were 3,840 updates to the panel across a second. That would be quite the bastardization of the term "refresh rate", but I could see that being the case.

[–] Alphane_Moon 2 points 3 days ago

Playing with some math, if you had 4 sub-pixel LEDs updating at 120hz and separated into 8 sections across the entire panel that was each offset in time by some fraction, you could say there were 3,840 updates to the panel across a second. That would be quite the bastardization of the term “refresh rate”, but I could see that being the case.

That's not really what people have in mind when referring to "refresh rate".😆

[–] Alphane_Moon 4 points 4 days ago* (last edited 4 days ago) (1 children)

The refresh rate in the product spec page has to be an error. 3,840 Hz?

[–] [email protected] 1 points 4 days ago* (last edited 4 days ago) (1 children)
[–] [email protected] 6 points 4 days ago (1 children)
[–] [email protected] 2 points 3 days ago (1 children)

Somehow I'm still sceptical. How would they achieve it and why would anybody need it?

[–] [email protected] 4 points 3 days ago

Oh I didn't try to imply that it's true just that the number is what the producer claims and not a comma mix-up.

In another thread someone said that they put the LED pwm as refresh rate which sounds both reasonable to me and something a marketing department could come up with.