you can, but you need to by a controller card for it. In laptops, the controller card is integrated onto the mobo or the vid card. You need to buy one that takes video in from your vid card and formats to the screen.
The reason people say its more expensive is because it typically is. Controller boards usually run between 200 and 800 dollars for most panels.
Google it, you'll find some places that sell them. You'll need to know the panel model #, usually on a sticker on the rear of it. Oh, and you might need to keep the backlight power inverter, so don't throw it away!