RP774 - WLED or Std LCD?

This is the description on my invoice:

RP774  Liquid Crystal Display, 13.3 WXGA, Video Elec. Stds. Assoc. TLF, TMD

The problem is that searching on this forum, when I change the brightness settings using the Fn+Up/Down, there are only 7 levels.  Also, my webcam can handle 1280x1024 resolutions (1.3Mpixel).  Based on what I found here on the forums, I can't tell if I got the right panel or not.  My original order did say this:

320-5583  13.3 Inch Wide Screen WXGA TL WLED Backlit LCD with Camera, XPS M1330

Please, someone please let me know if my display is correct or did Dell screw something up.

I got this laptop last year and started having issues w/ power adapter and graphics chip.  Just got a new motherboard and started to think whether or not I had the right display here.

Thanks for the feedback!