Ahigh wrote:The moving image is as sharp as a CRT. There is just a very very faint ghost image from the previous frame that is slightly visible. Other than that, no flaws at all in the motion portrayal that I can see. The ghost image is visible with a black background, but not really distracting. I imagine the ghost image would be less obvious with more than a black background.
Aha, now I understand. That's the inter-refresh crosstalk (which I now call "strobe crosstalk" -- the remnants of the previous LCD refresh leaking into the next strobe).
It is an attribute of most strobe-backlight LCD's. It varies depending on the panel, sometimes it's almost completely gone (e.g. there is nearly no inter-refresh crosstalk on the VG248QE panel in the center band in LightBoost mode, and only minor at the top/bottom edges of the screen).
The strobe crosstalk on most good, new strobe-backlight LCD's is faint enough that it becomes unnoticeable in the visual clutter of detailed panning imagery such as
http://www.testufo.com/photo
I have four different strobe backlights sitting here (LightBoost, ULMB, Turbo240, and BENQ XL2720Z Blur Reduction), and all four of them generate slightly less to much less strobe crosstalk than what I see in your high speed videos, so I was curious. But yes, even the motion blur elimination is still very impressive even when there is a fair bit of strobe crosstalk.
A good test pattern to test for strobe crosstalk (ghosting) is
http://www.testufo.com/ghosting
BTW, you might be interested in playing with pursuiting the camera (using a longer exposure & panning the camera while taking a photo) -- see
pursuit camera instructions for more information.