Laptop screens are usually LVDS. I know of one case on this forum several years ago where someone extended an LVDS cable. However, it is a more advanced hack. I think the length of the run is one factor and it also it uses a ribbon cable, so it can be difficult to extend.
Search on terms LVDS and you may find the thread. Barring that, take a look in the FAQ Emporium for threads on different types of displays. It may be referenced there.