Are smart phone screens susceptible to phosphor burn?

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I'm starting to realize that some of my knowledge of hardware is getting dated and I may need to borrow an A+ book from the library even though I've had the cert for almost 10 years, and probably could have gotten it 15 years ago if I'd known about it.

I've heard that modern flatscreen monitors aren't nearly as susceptible to phosphor burn, but I haven't been able to confirm that.
What about smart phones? My current phone has a feature where it won't turn off the screen automatically if I have it plugged into to a computer or other power source.

I am currently in the middle of moving about 1200mb of movies onto the phone to watch later as a passenger on a long car trip, but am ready to goto sleep. It is taking much longer than it should for some reason.
Do I need to make sure to disable the feature so the screen turns off to make sure the home screen of my HTC One X+ phone doesn't get burned into the screen? Is it even an issue?

When I learned about phosphor burn, there was no such thing as a smart phone, the height of cell phone technology was the Motorla "brick" or a car phone. Laptops with B&W LCD screens were rare and expensive. I believe that a laptop with CGA (yes, the Crappy Graphics Adapter that looked lousy even in its day compared to an Apple IIe) graphics did become available around that time.
This was before the Powerbook 100, the first laptop I ever got to try outside of a store demo.

Sorry if I'm rambling, I'm about to goto sleep. I'll see any replies in the morning.

 

I don't know about phosphor burn-in, but a lot of smart phones tend to have LED or OLED screens. I'm not sure if they're susceptible to burn-in. A lot of screens still have some kind of burn-in protection, though I'm not sure how necessary it is - it could be just some superfluous left over.

 

No, they don't burn. And most are made of gorilla glass, so they won't scratch. There's vids on Youtube of guys taking Stanley blades to their phone screen and still can't scratch it

 

I've got a nick in the screen from when I dropped a tool on it at work. I did get a screen protector thingie on it.

Still, the question is, is there any danger from leaving an HTC One X+ phone on all night with the screen lit while I goto sleep?

 

Why would the screen stay on?

 

Burn-ins are a thing of the past. Way back when screens were a CRT.
A whole different thingy.

There are no bad side effects in leaving your smart phone on all night. save for the battery-drain and the light obviously.

And now that you reminded me of burn-ins and CRT I feel old.

 

I use a CRT every time I play an Infinity Engine game. I didn't get a flatscreen until 2009. Why waste money when I have a perfectly good monitor? Heck, the only reason I replaced my HP DeskJet 812C from 1998 is that the cartridges cost more than a new cheap printer.

 

Actually, burn in is not a thing of the past. Plasma tvs can still have burn-in, although it is not all that common any longer and they are not used in smart phones. Just sayin'

 

If I plug the phone into a computer while it's turned on, it has a feature that prevents the screen from automatically turning off and going into standby mode.
One of the reasons for this is because by default all downloads and other data connections are severed when the thing goes to sleep when the built-in "power saver" is enabled.