mechanism about differential spoilers
 

HI guys. Wanna ask for a detailed explanation about the mechanism of differential spoiler and non differential spoiler. How do them actually work? just get frustrated when i saw an expression below:

non differential spoiler:

speed brakes fully retracted:right spoiler extends
left spoiler remains retracted

speed brakes fully extended:right spoiler remains extended
left spoiler remains extended

speed brakes half extended:right spoiler extends further
left spoiler doesnt move

differential spoiler:

speed brakes fully retracted:right spoiler extends
left spoiler remains retracted

speed brakes fully extended:right spoiler remains extended
left spoiler retracts

speed brakes half extended:right spoiler extends further
left spoiler retracts

few questions about this statement:
here it was saying the difference between diff. spoiler and non-diff. spoiler is diff. spoiler retract and supplement roll control when speed brake is fully extended. however, if non-diff. spoiler doesnt contribute to roll control, why there is difference between right spoiler and left spoiler?(because of balancing P factor? I dont know just guess :P)
also why right spoiler needs to extend further when speed brake half extended?
is the situation of differential spoilers above talking about one direction roll movement or i am actually out of track?

Pls help!
i am a newbie on aviation as well as in this forum.sorry for my poor English and if i am posting it in a wrong place.

Thanks all!

The term "differential spoilers" relates to how spoilers augment the roll commanded by the ailerons during speed brake operation. This arrangement maximizes the augmentation of roll control with a small sacrifice in (commanded) profile drag braking.

"Non-differential" spoiler arrangement will augment aileron roll control to a lesser degree during partial extension and when the speed brakes are fully extended, they offer no help.

The example you have given is for a right turn.

This is one of the key differences. See below for the rest.

Non-differential (standard) spoiler deployment contributes to roll control in all but the fully extended speed brake configuration. Another way to think about it is the non-differential spoiler arrangement never reduces profile drag during roll control augmentation.

To assist with roll control.

Might have solved aileron reversal, but the Hun still at strong adverse yaw at higher AOA—high G or slow speed. Nasty Sabre dance video. Best 500 hours of my flight time.