LCD panels have two connections: A data cable (20 to 60 pins), and the
backlight.
The data cables are totally non-standard and unique, unless you got a panel
that takes VGA or video inputs (this is extremely rare and not the norm).
Almost every single panel is different from almost every other panel, and
the connectors are impossible to get in small quantities.
The backlight is just the two ends of a cold-cathode Fluorescent lamp tube 6
to 16 inches long, depending on the size of the LCD panel. It goes to a
high voltage inverter mounted in the lid of the laptop with the LCD panel
which produces 400 to 2,000 volts to start and run the lamp. [some larger
LCD panels have multiple lamps].
The chances of being able to successfully use an LCD panel from a laptop for
any other purpose are near zero.