News World's largest mobile LED screen is 767 inches, with a 4K resolution and a 3,840 Hz refresh rate

[Admin]

Belgian LED displays specialist Photonics showcased its 161.5-square-meter, 4K-ready Jumbo162 screen outside ISE 2025 in Barcelona earlier this month.

World's largest mobile LED screen is 767 inches, with a 4K resolution and a 3,840 Hz refresh rate : Read more

 

[Alvar "Miles" Udell]

A long cry from AMD's Eyefinity 24 16 years ago.

 

[edzieba]

Combined with the gold-wire full-black LED lamps and precision shader design, this is touted to enable great contrast. We are, therefore, puzzled that Photonics doesn’t share any contrast ratio specifications.

First, because being an emissive display the static "0 to 255" contrast ratio is a divide by zero error, so a nonsensical measure. Second, because it's an outdoor display so contrast ratio will vary continuously with ambient and incident light levels (even varying across the display itself due to its size, e.g. if half is shaded by a nearby tree).
In practice, users would be tuning the response curve to match the content being displayed so achieved contrast in the lighting conditions encountered (e.g. inside a covered stadium or outdoors at night vs. outdoors midday) is adequate for the content presented.

 

[bit_user]

Refresh rate: 3,840 Hz

If this is an accurate stat, then what it's probably referring to is the base frequency of some sort of PWM scheme used for varying LED brightness. Without any sort of dithering, that would give you 64 levels of intensity per 1/60th of a second (i.e. equivalent to a 6-bt + FRC LCD monitor with a native 60 Hz refresh rate). 4k resolution would afford you the margins to use dithering to achieve much greater precision.

 

[Giroro]

LED displays can be arbitrarily large, and resolution scales linearly with size. Making a big one is not impressive, not even that stupid building in las Vegas.

The hard part is making an LED display small.

 

[TwoSpoons100]

The 3,840Hz is clearly not the frame refresh rate - that would imply a colossal video bandwidth at 4k.

The impressive thing is that they mounted this on a pole, on a truck.

 

[Jabberwocky79]

I'm considering installing one of these in my living room, but I'm concerned about the pixel density, even at 4K 😏