Happy New Year PICLISTERs

I am interfacing a PIC 16C84 to a multiplexed Common Anode 3 digit 7
segment LED display.

Power for the circuit is 2 'AA' battery cells (nominal 3V).

Each LED segment is rated for a maximum forward voltage of 2.8V.

QUESTION: Do I really need current limiting resistors ?

The individual segments are pulled down by the PIC port B outputs,
which introduce some voltage drop.

Each common anode is driven by a 2n3906 transistor. Its voltage drop
will vary around 0.2 volts depending on how many segments are turned
on.  This will result in some variation in intensity, but I think I
can compensate for this by varying the mux duty cycle depending on the
number of segments turned on.

QUESTION: Has anybody tried this ? Anything I am missing here ?

Randy Howe