this post was submitted on 18 Feb 2025
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World's largest mobile LED screen is 767 inches, with a 4K resolution and a 3,840 Hz refresh rate (www.tomshardware.com)
submitted 4 days ago by [email protected] to c/[email protected]
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[–] [email protected] 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.

[–] [email protected] 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".😆