The datasheet indicates that your matrix can be driven at 30mA per LED at 10% duty cycle which would give you a brighter display, but if you're okay with the brightness at 20mA, then that darlington array will be fine.
The datasheet indicates that your matrix can be driven at 30mA per LED at 10% duty cycle which would give you a brighter display, but if you're okay with the brightness at 20mA, then that darlington array will be fine.