Originally Posted by Mike Garrett
If the laser shuts off, you need to use a pattern with a single white pixel in the corner. Then mask off the pixel and measure the black level.
Interesting, the quote he referenced was that contrast was measured by the Full On Full Off standard.
Originally Posted by 12GAGE
Just a point of note, at least on the 970 the laser does not shut completely off. In that mode it is indeed true black. I wouldn’t be surprised to see pretty high contrast numbers using that black threshold. It is a bit misleading however because the black level never goes that low with actual content. It is still better than most would expect from a DLP however.
Thanks, 12Gage. So it seems it can hit the high numbers but not in actual content, you're saying. Anyway, I know people who have the LK970 rave about its overall performance. I'm still interested in seeing a demo of either the LK970 or the LK990.
Originally Posted by wombats
On the specs pages for these projectors:
They list 3,000,000:1 contrast but most of the announcement sites and sellers list 100,000:1 native.
The BenQ site says "The Contrast is measure by Full On Full Off standard."
Something tells me that it would be a mistake to cancel my JVC NX7 pre-order and get an LK9xx model? The BenQ numbers on paper smell rotten except for the brightness.
If your sole goal is best black levels, go for a used JVC X990. I had one and contrast and black level were reference.
Lasers give calmness and stability to the image. I did have the laser DLP, UHZ65, before I ran into an issue with it. (By the way, that had a great dimming algo, and I measured the UHZ65 contrast in dynamic black 2 [middle dimming option] at over 35,000:1, and blacks looked great.) I really liked the sharpness/precision, tone mapping, colors, brightness and motion on the laser DLP more than on the JVC X990. I thought the overall picture on the laser was better. The weakness of the JVC X990, IMO, was in its processing. In comparison to the laser's, the image on the JVC X990 looked a bit raw; I saw plenty of black crush and pixel noise and difficult tone-mapping, even using an external device... was frustrating. I know of one AVS member, tnaik4, who has the LK970 and a JVC RS440, and he said since the LK970, he now mostly uses the LK970. Of course, I have not yet seen operation of or measured any of these new JVCs. And I don't know your seller's pre-order pricing policy, but if you can, I would definitely try to demo both the LK990 and the NX7.
By the way, I returned the UHZ65 due to a problem with its on-screen menu/displaying odd hz. And as I pulled up the menu more and more to see if the problem was still there, I began to see more and more rainbows. However, owners of the LK970 are reporting no meaningful issues with rainbows. I would think the LK990 would be similar there.
Good luck and I hope that helps.