Comment on Sunglasses that block out glare with lcd spotparentComments−ars15yThey exist - google for auto darkening helmet, and they use LCDs.The UV and infrared are always filtered (by the glass), and the LCD handles darkening the visible light.−ZoFreX15yYeah, it's not the visible spectrum that's harmful to your eyes. If you filter out all of the harmful frequencies entirely, you can selectively filter the visible spectrum for convenience while retaining a non-disastrous failure mode.
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They exist - google for auto darkening helmet, and they use LCDs.
The UV and infrared are always filtered (by the glass), and the LCD handles darkening the visible light.
Yeah, it's not the visible spectrum that's harmful to your eyes. If you filter out all of the harmful frequencies entirely, you can selectively filter the visible spectrum for convenience while retaining a non-disastrous failure mode.