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How can I tell if my laptop screen is IPS or TN?

Barfo

Lifer
Got a new Latitude E7440 issued by my employer, so I don't really have a detailed spec sheet. It's got a 14 inches, 1080p panel. I don't really know (or care) if it's a touchscreen since it's been downgraded to Windows 7.

I would like to know if the panel is IPS as some reviews say or something else, since the viewing angles seem kinda bad to me.
 
Set your cell phone next to the display at the same viewing angle. Then move your head around and see if the laptop screen remains as bright/clear/easily viewed as the cell phone.
 
I've yet to come across a Latitude with a IPS display. All latitudes (being a business oriented laptop and stuff) come with TN.

Also, this review -> http://www.notebookcheck.net/Review-Dell-Latitude-E7440-Notebook.103185.0.html

It says it has a TN panel.
Yeah I was kinda surprised when I read some reviews stating it has an IPS. Apparently some of the screen options are IPS panels. From your link:

Update 11/20/2013: Review update E7440 (IPS FHD, 4300U, 128 GB)
We had the chance to review an E7440 with a matte Full HD IPS display (1920x1080 pixels), a Core i5-4300U and a 128 GB SSD. We added the according information in the sections Display, Processor, System Performance and Battery Runtime.
 
Alternatively download HWinfo64. Grab the model number from the Monitor section. Google the model number for information.
 
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