MAMEWorld Forums - Programming - Success! Software-based black frame insertion works! 60fps now has less motion blur on 120Hz LCD's

I've posted a new thread on mameworld.info about the new MAME zero motion blur patch for 120 Hz displays:
http://www.mameworld.info/ubbthreads/showflat.php?Number=305674

We've blogged about it at:
www.blurbusters.com/mame

It reduces motion blur by 50% on regular 120 Hz LCD's,
and reduces motion blur by 90% on LightBoost 120 Hz LCD's.
(percentages relative to a 60 Hz LCD).
It also fixes double-image effect with 240p 120Hz on 31.5 Khz CRT's

Why 90% instead of 50% with LightBoost? That's because of their strobe backlight that flash once per refresh (strobe measurement lengths as small as 1.4ms -- that's less than 1/10th of a regular 60Hz refresh of 16.7ms). 90% reduction means where there was a long motion blur during fast motion, the motion blur trail is 1/10th as long on a LightBoost LCD. The blur is so tiny during fast zooms and pans, it looks exactly like a CRT. CRT perfectly sharp motion. The LightBoost LCD successfully bypassing the pixel persistence (eliminating sample-and-hold problem) through its stroboscopic backlight (by keeping pixel transitions in total darkness between frame refreshes). Problem is, LightBoost only works stroboscopically at 120 Hz, not 60 Hz. The MAME black frame insertion fixes the problem with a black frame insertion. So we have 60Hz strobed, just like a 60Hz CRT. Either way, MAME black frame insertion will work with all 120 Hz displays, just to varying extents, depending on how they work. Usually you will get nearly exactly 50% less motion blur.