Sorry, but you can't use a laptop screen without an input, and laptops don't have video inputs like that.
An HD tuner will not work because the signal that a tuner decodes is different from the signal between two HD devices. A regular tuner will give you bad results because it will be limited to standard def - might as well buy a cheap sdtv.
The only product that would work is a controller circuit board that is compatible with your screen and it would require you to dismantle the laptop and use the controller in place of the laptop.