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What's the reason for high refresh rates?
(lemmy.keychat.org)
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this post was submitted on 10 Feb 2024
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My guess is there's been a game of telephone with the information.
The refresh rate likely refers to the drivers of the individual LEDS making up the panel.
For those confused, getting a nice linear output from an LED is extremely difficult. They vary significantly based on age, use, and manufacturing tolerances. It's far easier to just set a max output, and use PWM. By combining 3 (or more) LEDs in a cluster, you can make the full mix of colours and brightnesses available.
Most generic led drivers work at a few khz, so 7.68khz is noticeably higher than normal. This is particularly important at low brightness. If your operation in the bottom 1% already, your available brightness levels go from 20 to 768. This would be particularly important with an outdoor screen. In daylight, you need a lot of output. The same output at night, however, would be blinding.
For an alternative comparison. An HD 50p video signal is 3Gbps. At 7680Hz it would be 460Gbps, an extreme ask of any sort of network. For no significant gain.
Marketing BS, really. Especially things like “view distance”
except on curved screens, it’s fairly forgiving. Curved monitors, you should be seated as close to its radius; but otherwise, you can have the same apparent monitor size/ resolution with a small, monitor sitting closer as a large monitor further away.
More like marketing running with something they didn't understand. They took what they thought they heard from the engineers, and wrapped it in marketing BS. A monitor with "7.68khz led drivers" (quite reasonable ) became a monitor with "a 7680hz refresh rate" (quite insane).