From the Atari Lynx schematic it looks like a LOT of pins (66 for columns and 6 for rows).
http://www.atariage.com/Lynx/archives/schematics/Schematic_Lynx_LR_Low.html
Looks like the columns are in three groups. Each group seems to have a two-phase clock.
Doesn't look at all easy to connect to.