Specification of mid-2010 15" MacBook Pro LCD panel?
Using information from the iFixit Team, I managed to get the part number of the display.

Apple Part #:      661-5483
Product code:      IF161-053-1 glossy, standard resolution
                   IF161-053-3 glossy, high resolution
                   IF161-053-5 anti-glare, high resolution


You can use this information for further research. I was not able get more than this:

Size:           15.4"
Resolution:     1440 x 900 WXGA+
Backlight:      LED
Surface:        Glossy
Aspect Ratio:   16:10 wide
Screen Type:    Thin-film transistor (TFT), Active-matrix Liquid Crystal Display (LCD)


[source 1,2]