I use film projection on for any 23.98 or so fps. While I don't see any flicker with film projection (dark frame insertion on), idon't see flick with it off. DFI just makes the motion seen smoother. But I would ask, if you doubled the frame rate, why would this be perceived as in increase in flicker?
You'd never see flicker with DFI off because SXRD/LCOS/LCD are sample-and-hold technologies. The 'default' state is not black, unlike plasma and CRT. There is no scanning or flashing of the image.
Therefore, the frequency with which dark frames are inserted becomes of utmost importance to avoid flicker when DFI is enables. Similarly, on Panasonic's plasmas, for example, the frequency at which 24p content is played back is of utmost importance. Their lower end TVs flicker in 24p mode, since they only frame double to 48Hz. Thee higher end frame quadruples to 96Hz, which yields an acceptable 96Hz flicker.
But again, with LCOS/LCD, there's no such thing as 'frame doubling' or 'frame quadrupling'. Unless you're inserting dark frames or interpolated frames.
Thanks for the feedback. Looks like Sony figured out DFI for 24p content on the VW1000. Not sure what's holding them back from proper implementation in all their other projectors.
Edited by sarangiman - 1/25/13 at 4:49pm