You can't have it both ways...
I have a bit of a problem (to quote from the article):
"If you want to waste an hour of your life, run into an engineer"
AND
"Sony, you put a guy directly in front of your new XBR7 LCD screen. That's great but unfortunately his maximum capability extended to reading the placard hanging on the wall next to the display. When I asked him about the type of backlight used in the display he had no idea"
I don't know what to tell you at this point Tom. The person that is going to be able to answer your questions is the same one you don't want to bump into.
An engineer isn't going to take an hour to answer what back light is in a TV. But they are going to be able to answer your next question, and then your next question after that
If they are taking too much of your time just excuse yourself.