I don't think that article is explaining the technology correctly. LCD screens have liquid crystal molecules that twist when voltages are applied to different degrees to effectively filter out all but one color per pixel when a backlight is shown through them.
(a) it takes a constantly applied voltage difference to keep the crystals that way, and thus energy,
(b) it takes a backlight to illuminate the display.
If there is no light source and no voltage needed to twist the crystals, how can that be lcd? We need a more indepth article that explains what the technology actually is and how it works. That posted article doesn't do that.