Originally Posted by chhanthony
LK990 has been install yesterday, spent 5 hours watching anc calibration, I can confirm that the images from LK990 are very very sharp, when I watching one sceen Hugh Jackman stand on the stage in The Greatest Showman, the picture is very very sharp, it is similar to the picture in JVC Z1 which I calibrated in two months ago.
Color in vivid mode is good when in cinema mode is under satrutation.
I got better image when I turn off the HDR mode.
I got the max 330nits in 100" screen, but it may the high light very unwatchable.
I can have real black when I use SmartEco, but the black level is not that good, I got 0.6 nit on 0% IRE.
For some reson I decided to return it to BenQ.
I don’t think you gave it nearly enough time and tweaking to get a real picture of what that thing is capable of, but thanks for the valuable input nonetheless.
Originally Posted by chhanthony
Black level, I can live with it, I will share the reason after I got my money back.
It would be great if you could share that reason NOW so the rest of us possibly don’t waste our valuable time, energy and money getting one only to have to also return it for the same issue. Thanks for your understanding in doing so.
Originally Posted by LeQuack
This is still a high lumen business projector, therefore I would guess home theater use is not the main goal of this projector. Obviously with that brightness it's going to have a high native black level and therefore the contrast will suffer, probably be more loud than a home unit, and also business DLPs all have clear or near-clear color wheel segments to increase lumens, which play havoc with colors, unless you can turn it off. I am not sure how turning off the non RGB segments affect the black value, if at all, since the light bleed would be the same.
So just based on the specs I'd say it's not going to make for a competitive home theater projector, 4K or no.
Yes it’s not really designed for home theater, although the LK970 does list that as a use case on its website. It’s apparent you haven’t seen it’s brother the LK970 tweaked up properly for HDR and HT purposes and in action though. It is a sight to behold, especially given what it can be had for now. The only slight knocks on it are black levels as discussed and maybe needing a little more color gamut width for HDR BT2020, which we are hoping the LK990 addresses.
As 12GAGE mentioned in a post re: the LK970 and also from my experience, you can’t go by a static black level pattern to measure the black floor. For some reason once you’re in actual transitioning video content, the black level goes lower, most likely due to the laser modulation and other video processing factors.
Yes, there are clear segments on the phosphor and color wheels, but not as you think their use case is. When using laser phosphor as a light source as opposed to a lamp, the clear segments are only there to allow the native blue of the laser phosphor and the yellow infused phosphor wheel color to pass through them. You will see this when measuring color gamut as those two are the most saturated of the 6 primary and secondary colors. The yellow from the phosphor wheel also mixes with red and green to give them a wider gamut as well, similar to using a yellow notch filter on a lamp based projector to achieve DCI-P3 colors.
The clear segments on laser phosphor DLP wheels are not used for increased brightness like they are on lamp based DLPs. Although I think maybe 12GAGE thinks they implement the clear segments to get the extra 1,000 lumens on the LK990 over the LK970, I personally think they just boost up the laser power or maybe added another laser bank.