I've managed to preserve a scary amount of high-frequency hearing despite exposure to gunshots, recurring ear infections, and eurobeat; my reward for this is the ability to hear heinously loud coil whine that my laptop generates whilst connected to an aftermarket power adapter
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I'm too occupied by their simulating police lights in my mirror (chromatic aberration + discrete spectrum + extreme blue freq = UHG) to notice if those awful things are flashing too...
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Flickering attracts attention so there is no advantage to smoothing anything but headlights.
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No, it's nowhere near that simple. Read the thread.
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Err, it is. Flicker attracts attention, it doesn’t black out objects at that speed. For most lighting and displays you don’t want to trigger motion sensation, but indicators are fine with that outcome.
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we’re talking about flickering at PWM frequency (not meant to be visible, is above 60Hz, but nevertheless becomes visible due to phantom array effects / incomplete saccadic masking), not the intended-to-be-visible (~10 Hz) on-and-off blinking. blinking is fine, visible PWM is not
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But it’s irrelevant to some applications; indicators being one of them. So taillights are not something it’s an important factor. Driving is not supposed to be comforting or non-fatiguing. It’s about being safe. Not everyone can or should drive.
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Gotta induce seizures in everyone, that'll improve safety in driving.
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I’d love to see evidence of more than a one in a million chance of that first, pls. Visibility saves far more lives than are being suggested are being affected by this.
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See this (https://www.maximintegrated.com/en/app-notes/index.mvp/id/4316 …) 2009 driver design, around the time the first LED taillights were deployed (by Cadillac). 200Hz PWM, 12Vin and 9V3 Vf (presumably in series). Cap smoothing wouldn't have been possible @ 20% duty. I assume today's designs are better.
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My guess is that quite a few of the taillights that are the worst offenders are aftermarket, where there's more penny pinching w/ lazy PWM designs. Specifically in taillights, since they need to dim to 1/4 or less, where Vf or spectrum shift might be an issue with cheap emitters.
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