OK, I grabbed the 10937 display driver data sheet. Had forgotten that
it uses a serial interface. That should simplify the circuit.
Probably just the PIC chip and some small circuitry to adjust
the backlight using the display brightness setting. So really
the interesting part will be the mechanics of fitting it into the
unit. Seems like the old display and possibly the drive chip
will need to be removed to make room. When I get home I
will take the Matrix 6R apart and check out the display board
layout. Also need to make sure there is enough current available
on the 5V supply to power the backlight.