Correct me if I am wrong, but isn't the LG BFI like a rolling scan rather than every other frame being black?For one, we are using actual refresh cycles to insert the black frames. The more black frames we insert, the fewer image frames we can show. So even though we have this working at up to 240Hz, we can only display up to 120 unique frames – the other 120 frames are necessarily black (Figure 7). This means that while BFI is active, Spectrum effectively behaves like a 120Hz monitor. Albeit a 120Hz monitor with very little motion blur!
Another limitation of this method is that we don’t have nearly as much control over that balance between brightness and blur reduction. With every other frame, image persistence is 50%, and that’s it. Our firmware team is working on settings that allow a new frame every third (Figure 8), or every fourth refresh cycle (Figure 9), with the frames in-between being black. This would offer settings for 33% and 25% persistence respectively, and would further reduce motion blur. Of course, this would now not only reduce the brightness, but also the maximum frame rate (in these cases, down to 80 and 60fps).
https://dough.community/t/project-spectrum-bfi-coming-to-spectrum-oled/38266
I thought for a moment they were talking about achieving a persistence lower then 4.17ms, but I guess the monitor will be fixed at 240Hz. And that they're just talking about getting that same 4.17ms, but also at 60 and 80 frames/sec.
By the same reckoning, I guess the CX with its apparent 3.13ms of persistence at 120 Hz BFI High is in terms of motion the equivalent of 320 Hz. If I understand this correctly.
Plus I would read anything Dough/Eve puts out with a huge grain of salt. They are a garbage company incapable of fullfilling their orders. They also kept "altering the deal" with their previous monitor model where things like open source firmware went and several other features went out of the window.