Default [Q] screen filter for IPS screen to save battery??

hello friends, i m using CHD A116 from last two month and i am not happy with battery performance. i have done every tweak to make my battery last long.

but when it comes to screen there is nothing to do with it.
i read that AMOLED Screen + screen filter app = reduce battery consumption by screen.

but for IPS screen "screen filter app" does not work. it only make screen darker. power consumption still remain same.

please suggest any app that work for IPS screen phones too..thanks
(and sorry for my bad English) :P