Originally Posted by ccarota
I've been reading through thousands of posts from the LK970/990 threads and my head is spinning; it's so hard to extract much usable information from the endless calibration arguments... Can anyone who knows this stuff parse it for me and/or point me towards the answers to these questions:
1. Why is the LK990 brighter?
2. Are the color wheels identical?
3. Do both have Smarteco/dynamic dimming implemented in the same way?
4. Why is contrast better on LK990?
5. Is the HDR support on the LK990 worth the $$ considering the limited gamut and color tracking?
6. What are "Dave's Settings" for the LK970/LK990 and where can i find them?
1. The 990 is not brighter, not at all, in fact, its Brilliant Colour and lack of being able to calibrate it results in maybe 3000lm or so with a half decent calibration, with brilliant colour off, which results in much more accurate colour, the unit I had here was knocked back to around 2000lm. The users I spoke to mentioned the 970 was actually brighter since it seems to be free of the brilliant colour bugs.
3. No, You wont have any sense of dimming with a 970, except the automatic power control thing, but that's never (ever) been proven to actually raise contrast despite subjective assertions (there is no data proving it does), so you would be stuck with 1000:1 at best.
4. The 990 has real laser dimming implementation, but this is only available in full brightness mode, so any manual brightness settings wont be able to be used in this mode, but this takes the native contrast from ~1000:1 to 5000:1, it is a noticable difference to when its off, the projector seemed broken to me without dimming active. The LK970 does not have this feature which is a big
con for the 970.
5. I've spent time with the LK990 as I am sure you read by now. If I had to buy one, I would buy the 970 though because the HDR modes are ordinary in the 990 and when enabled the colour temperature takes a hit (brilliant colour bug) which means you would probably want to bypass it anyway with a good tone mapping solution so the in built HDR mode would end up irrelevant.
The other thing with the LK990 is if you wanted to use SDR BT2020 you cannot fundamentally because BT2020 is only available when an HDR flag is present. the projector wont allow you to select colour spaces in SDR mode. The Panasonic UHD players best feature is its HDR Tone Mapping, which requires an SDR Power Gamma to operate, and this is not possible in tandem with BT2020 due to the HDR Flag being the only way to get the projector into BT2020 mode. So you would be stuck with Rec709 if you want HDR Tone mapping.
If they were to fix this what they need to allow is the selection of colour spaces when fed an SDR signal. Right now you CAN change the colour spaces, but only when the projector is fed an HDR flag, which is a contradiction because if you dont have a BT2020 flag present either, the projector WONT go into HDR mode. Thats a massive contradiction.
The LK970 suffers none of those issues.
The last thing, is make sure you are not susceptible to DLP rainbows. I would highly recommend going to view one somewhere.
OR, look at one of the other LED DLP units. Why are you so set on the 970/990?
*Edited for clarity in neat point form.