>I hope they don't think they can patent or copyright this?
No, many similar products already exist. f.Lux say their product is patent pending, but I've heard of no great spats between them and makers of similar software. Nor can it copyrighted, naturally.
>It MAY work for OLED screens, but LED lit LCD are violet/blue LEDs with yellow phosphor to provide the "white" backlight and this idea is poor on them
You''ve misunderstood LCD screens. The resulting white light is filtered through LCDs. Hence the name. And I can confirm that f.Lux works very very well on my LED-backlit LCD screen.