Greetings,
this question is just pure curiosity.
When filming a screen through camera it has been usual to see strange things that can't be seen through the naked eye. For example, with old CRTs when filmed you could see the screen refresh flickering as hell.
With the advent of LCDs you could see a very stable image due to the change in technology. But recently I've seen something very strange pointed to by my sister.
She has an HP laptop and by chance saw the screen in a recording through a CMOS camera. She was amazed by what she saw. The screen has a cycle of fading to black and recovering which is very slow. I mean, she just couldn't understand how she doesn't notice anything in everyday use. The screen seems completely faded during a second and then recovers. At the side it could be seen a desktop LCD monitor and the image was pretty constant with a slight flickering.
I don't know if this is some artifact of recording with CMOS cameras or modern laptops have some crazy stuff regarding how they refresh or if this is anything related to energy conservation in a laptop screen. The laptop screen is amazing, although it is a run of the mill 1366x768. She just bought the laptop for the display because it is the one that gives her less eye strain.
Anyone knows anything about this stuff or can point me to sources for research?
Thanks.