BenQ LK990 Owners Thread - Page 2 - AVS Forum | Home Theater Discussions And Reviews
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post #31 of 805 Old 12-27-2018, 05:46 PM - Thread Starter
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Hi Guys,

Attached the screen capture of the measurements of LK990 which I took on the first day.

LK990 just likes all laser base projector output not very linear for calibration, I have to make some compromises. Okay, the result is not that bad but under my expectation......as BenQ always claim their color accuracy is very good, at least my HT1075 can reach very low dE.

In LK990, I believe the color hue on blue green and cyan are the biggest challenge for me.

And have to clarify that the 0% IRE should be 0.06 instead of 0.6.

BenQ will pick up the projector for checking.

HDR








SDR





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Anthony Chan
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Last edited by chhanthony; 12-29-2018 at 09:32 PM.
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post #32 of 805 Old 12-27-2018, 08:24 PM
 
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Quote:
Originally Posted by chhanthony View Post
Hi Guys,



Attached the screen capture of the measurements of LK990 which I take on the first day.



LK990 just like all laser base projector output not very linear for calibration like lamp base projector, I have to make some compromise. Okay, the result is not that bad but under my expectation......as BenQ always claim their color accuracy is very good, at least my HT1075 can reach very low dE.



In LK990, I believe the color hue on blue green and cyan are the biggest challenge for me.



And have to clarify that the 0% IRE should be 0.06 instead of 0.6.



BenQ will pick up the projector for checking.



HDR

















SDR












Thanks. I think I can work with that!
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post #33 of 805 Old 12-29-2018, 09:25 PM
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Where can i get a cheap but good calibration equipment?
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post #34 of 805 Old 12-31-2018, 05:22 PM
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Quote:
Originally Posted by djlemo View Post
Does anyone know what the input lag is on this projector? I'm thinking about getting this, but wasn't sure how it would be for gaming.
I'm also curious to know what the input lag is on this projector. Running this test against a known monitor is best, but any monitor comparison would be helpful:

http://www.lagom.nl/lcd-test/respons...php#ilag_frame

As it does not have a specific low latency mode, it might run most responsively with motion processing disabled.
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post #35 of 805 Old 01-21-2019, 06:19 PM
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Hi Anthony, I’m scared when you say there is only one lk990 in hk...I’m planning to visit hivihk(数码奇云)today or tomorrow because they claim they do have one lk990 in demo and I want to take a look in person then buy it if I’m satisfied with its performance.

Is it possible that the demo machine is the one you returned?
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post #36 of 805 Old 01-22-2019, 08:24 AM
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Originally Posted by Dave Harper View Post
Thanks. I think I can work with that!
Dave any chance you can take an ht9060 and lk990 and video/photograph them with fast shutter speed so we can get an idea of the difference in sequential color speed? Would be interesting to see what shutter speed each one breaks down into individual colors to get an idea of the real world rbe impact.

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post #37 of 805 Old 01-22-2019, 09:10 AM
 
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Originally Posted by Ruined View Post
Dave any chance you can take an ht9060 and lk990 and video/photograph them with fast shutter speed so we can get an idea of the difference in sequential color speed? Would be interesting to see what shutter speed each one breaks down into individual colors to get an idea of the real world rbe impact.

Sure, just send me an HT9060 and LK990 and I’ll get right on it!

I’m not a dealer and I’m semi-retired, so I’ll be lucky getting one of those.
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post #38 of 805 Old 01-22-2019, 09:13 AM
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Sure, just send me an HT9060 and LK990 and I’ll get right on it!

I’m not a dealer and I’m semi-retired, so I’ll be lucky getting one of those.
Oh thought you were still in the biz.

Would make for an interesting comparison though.

I also looked at diagrams and hardware wise appears nothing that would result in lk990 cover lower color gamut so I assume in software they sacrificed color accuracy to help achieve that extra 1000 lumens. Should be able to calibrate lk990 to the same as lk970 for color gamut.
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post #39 of 805 Old 01-22-2019, 06:47 PM - Thread Starter
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Quote:
Originally Posted by tushizuo View Post
Hi Anthony, I’m scared when you say there is only one lk990 in hk...I’m planning to visit hivihk(数码奇云)today or tomorrow because they claim they do have one lk990 in demo and I want to take a look in person then buy it if I’m satisfied with its performance.

Is it possible that the demo machine is the one you returned?
As I know yes.......

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post #40 of 805 Old 01-23-2019, 09:03 AM
 
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Originally Posted by Ruined View Post
Oh thought you were still in the biz.



Would make for an interesting comparison though.



I also looked at diagrams and hardware wise appears nothing that would result in lk990 cover lower color gamut so I assume in software they sacrificed color accuracy to help achieve that extra 1000 lumens. Should be able to calibrate lk990 to the same as lk970 for color gamut.

I’m in just enough to be dangerous!

I agree, I think we should be able to calibrate to same result minimum with the LK990.
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post #41 of 805 Old 01-24-2019, 06:35 AM
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Quote:
Originally Posted by chhanthony View Post
As I know yes.......
Quote:
Originally Posted by tushizuo View Post
Hi Anthony, I’m scared when you say there is only one lk990 in hk...I’m planning to visit hivihk(数码奇云)today or tomorrow because they claim they do have one lk990 in demo and I want to take a look in person then buy it if I’m satisfied with its performance.

Is it possible that the demo machine is the one you returned?
only 1? There are 3 units of LK990 in HK. The demo unit in hivihk is another one
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post #42 of 805 Old 01-24-2019, 11:25 PM - Thread Starter
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Originally Posted by avkelvin View Post
only 1? There are 3 units of LK990 in HK. The demo unit in hivihk is another one
Thank you for your clarification, the just heard this information from my dealer.

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post #43 of 805 Old 01-28-2019, 09:49 AM
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Originally Posted by Dave Harper View Post
I’m in just enough to be dangerous!

I agree, I think we should be able to calibrate to same result minimum with the LK990.
Do you plan on getting the LK990? They are selling it now in the US for 479 dollars more then the LK970. Im waiting to see if this is any better then the 970, other then 3d and a 1000 more lumens.
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Originally Posted by Desmond7 View Post
Do you plan on getting the LK990? They are selling it now in the US for 479 dollars more then the LK970. Im waiting to see if this is any better then the 970, other then 3d and a 1000 more lumens.

Yes I’m hoping to. Shoot me a PM with where you saw that.
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Yes I’m hoping to. Shoot me a PM with where you saw that.
OK, let me know if you ever compare one to the 970.
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post #46 of 805 Old 01-28-2019, 04:12 PM
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Originally Posted by Dave Harper View Post
Quote:
Originally Posted by Desmond7 View Post
Do you plan on getting the LK990? They are selling it now in the US for 479 dollars more then the LK970. Im waiting to see if this is any better then the 970, other then 3d and a 1000 more lumens.

Yes I’m hoping to. Shoot me a PM with where you saw that.
Yes PM me too. Please
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OK, let me know if you ever compare one to the 970.

I don’t think I’ll have them at the same time to directly compare, but I should be able to tell if the LK990 adds anything over the LK970 image quality wise. I know the 970 pretty well now and what I can get out of it.
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post #48 of 805 Old 02-08-2019, 05:28 AM
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I talked to a dealer that I know yesterday, and he is telling me that the LK990 is not even showing as available currently. It's possible that BenQ is aware of some issue and is withholding new units from going out. It's also possible that having only a handful of units available at initial launch is just normal procedure for very-recently-released units, I just don't know enough, but passing along info nonetheless.

Dave your comments have been very helpful. I had been considering the Z65, but my budget allows for something in the HT9060/LK990 price range, and I was always disappointed at the selection of features in this range. It seems like the LK970/990 fills this price point perfectly.

As far as the ongoing HT9060/LK990 debate that seems to be happening, the LK990 would be a no brainier for me, as ambient light is being battled almost constantly in my environment. I'll take the extra few thousand lumens and the color wheel, over the LED rapid cycling if I have to make that decision today. Of course, if somebody could just bump the HLD LED lumens up to 5k or install a triple-laser and keep it under $10k, THAT would be the true no-brainer. Maybe in 2 years... story of tech... sigh...
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post #49 of 805 Old 02-08-2019, 10:31 AM
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I've heard similar, and my attempts to get a quote for the 9060 have been unsuccessful so far as well. I've seen one site with a great price on the 990 but no indication they're actually in stock. I'll wait until more folks have these to do a comparison. I do have a bat cave so in theory I may not need the extra lumens. But it might be nice.

I do want 3D as I do have a fairly sizable library that has never been done proper justice, so I'm content to wait.

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post #50 of 805 Old 02-08-2019, 01:43 PM
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I've heard similar, and my attempts to get a quote for the 9060 have been unsuccessful so far as well. I've seen one site with a great price on the 990 but no indication they're actually in stock. I'll wait until more folks have these to do a comparison. I do have a bat cave so in theory I may not need the extra lumens. But it might be nice.

I do want 3D as I do have a fairly sizable library that has never been done proper justice, so I'm content to wait.
Hi

Not sure where you are located but these guys have the HT9060 on their website... they are in Ontario, Canada.

https://www.eastporters.com/product/...enhancer-copy/

Perhaps they could give you a quote and if they have stock.

Good luck.
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post #51 of 805 Old 02-08-2019, 01:54 PM
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Here is the last blue laser calibration I did for SDR. 709 should NOT be an issue. Didn't even need to do a LUT for this.

Pre calibration



Post calibration

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post #52 of 805 Old 02-08-2019, 06:43 PM - Thread Starter
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Hi Kris

May I know what divice to calibrate? BenQ LK990 or lumagen?

As I cant get good result with the LK990.

Anthony

Quote:
Originally Posted by Kris Deering View Post
Here is the last blue laser calibration I did for SDR. 709 should NOT be an issue. Didn't even need to do a LUT for this.

Pre calibration



Post calibration


Anthony Chan
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Quote:
Originally Posted by briangreen View Post
I talked to a dealer that I know yesterday, and he is telling me that the LK990 is not even showing as available currently. It's possible that BenQ is aware of some issue and is withholding new units from going out. It's also possible that having only a handful of units available at initial launch is just normal procedure for very-recently-released units, I just don't know enough, but passing along info nonetheless.



Dave your comments have been very helpful. I had been considering the Z65, but my budget allows for something in the HT9060/LK990 price range, and I was always disappointed at the selection of features in this range. It seems like the LK970/990 fills this price point perfectly.



As far as the ongoing HT9060/LK990 debate that seems to be happening, the LK990 would be a no brainier for me, as ambient light is being battled almost constantly in my environment. I'll take the extra few thousand lumens and the color wheel, over the LED rapid cycling if I have to make that decision today. Of course, if somebody could just bump the HLD LED lumens up to 5k or install a triple-laser and keep it under $10k, THAT would be the true no-brainer. Maybe in 2 years... story of tech... sigh...

Now that I’ve discovered some color filters that can get you to ~95-100% P3 (still testing), I don’t see a reason to go with the HT9060 honestly unless you’re hyper sensitive to rainbows.


Quote:
Originally Posted by Kris Deering View Post
Here is the last blue laser calibration I did for SDR. 709 should NOT be an issue. Didn't even need to do a LUT for this.



Pre calibration







Post calibration




Kris,

Is that on an LK990?
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post #54 of 805 Old 02-09-2019, 04:34 AM
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Now that I’ve discovered some color filters that can get you to ~95-100% P3 (still testing), I don’t see a reason to go with the HT9060 honestly unless you’re hyper sensitive to rainbows.
Do you have a link, reference, price for the color filter?
Do you put them on the lens or inside the projector?


Thanks.
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post #55 of 805 Old 02-09-2019, 06:53 AM
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Now that I’ve discovered some color filters that can get you to ~95-100% P3 (still testing)
Those type of yellow notch filters cut the light output by ~20% typically. I know the LK990 has a lot to start with, but worth noting you will lose some of that high output dynamic look of the LK990 for the higher color gamut. This does not happen with RGB LED/Laser projectors since the light source is natively capable of P3.

Quote:
I don’t see a reason to go with the HT9060 honestly unless you’re hyper sensitive to rainbows.
First of all the low RBE performance of the HT9060's fast cycling LEDs is kind of a big deal. The stable picture, free of RBE, is why a lot of people bought 3 chip DLPs back in the day. You can get something approaching that 3-chip stability with the HT9060, while retaining the sharpness of a single chip - a pretty great combo.

There is also the fact that you wouldn't have to buy a third party filter with the HT9060, nor do you lose light output in P3 mode with the HT9060.

Further, the HT9060 has less moving parts than the LK990, with no wheels at all instead of the multiple wheels the LK990 has. Some may like the no-wheels setup better from a reliability standpoint since when DLP projectors fail color wheels are one of the common culprits.

So, the HT9060 definitely has benefits the LK990 lacks, and vice versa. Until a future version of the LK990 is released with native p3 and fast cycling RGB lasers, the HT9060 will be a more attractive projective to some users simply due to its viewing comfort. It really comes down to whether you want the more punchy & dynamic picture (LK990), or the more comfortable one (HT9060).

Simply looking at the way they are configured these projectors address two different audiences: For someone who does a lot of movie marathons or has younger kids, the HT9060 is the better choice IMO - a perfect projector for an enthusiast w/ a family who wants something that won't be too hard on the eyes for any involved. For an enthusiast looking for maximum HDR impact that isn't as concerned with others watching their screen, the LK990 is the better choice. And if you have a significant amount of ambient light and a larger screen, the LK990's extra lumens will help retain a saturated image - though the HT9060 will work for this too on smaller screens.

Last edited by Ruined; 02-09-2019 at 07:01 AM.
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post #56 of 805 Old 02-09-2019, 07:31 AM
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Those type of yellow notch filters cut the light output by ~20% typically.
The LK990 starts with 6000 lumens.. so, it's really a non issue even with 20% output loss... which leaves it with 5000 Lumens.. you still get that bright, popping image... compared to all other projectors that have only 2000 lumens... (I am not talking about $50K projectors here).
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Originally Posted by coolgeek View Post
The LK990 starts with 6000 lumens.. so, it's really a non issue even with 20% output loss... which leaves it with 5000 Lumens.. you still get that bright, popping image... compared to all other projectors that have only 2000 lumens... (I am not talking about $50K projectors here).
The LK series also loses many more lumens when calibrated since it's maxed for brightness instead of color accuracy out of the box. LK970 calibrated drops from 5000 to 3600 lumens, a 1400 lumen loss. HT9060 drops from 2200 lumens to 1700 lumens calibrated, a 500 lumen loss. So the lk990 isn't starting with as much as you think, though it's still quite a bit; given the way-off results posted here by an lk990 owner I wouldnt be surprised if it's the same hardware as the lk970 with color further tweaked for max brightness.

The LK990 with the filter in place fully calibrated will likely be in the 2700-2900 lumens range in p3 after filter. Still higher than the ht9060 1700 calibrated lumens in p3, but not double the lumens like without the filter.

Last edited by Ruined; 02-09-2019 at 08:07 AM.
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post #58 of 805 Old 02-09-2019, 08:07 AM
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The LK series also loses many more lumens when calibrated since it's maxed for brightness instead of color accuracy out of the box. LK970 calibrated drops from 5000 to 3600 lumens, a 1400 lumen loss. HT9060 drops from 2200 lumens to 1700 lumens calibrated, a 500 lumen loss. So the lk990 isn't starting with as much as you think, though it's still quite a bit.

The LK990 with the filter in place fully calibrated will likely be in the 2700-2900 lumens range in p3 after filter. Still higher than the ht9060 1700 calibrated lumens in p3, but not double the lumens like without the filter.
That is a lot of lumens loss... still, it'll be more than the JVC Z1 (with filter in), that only gets about 2000 lumens...
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post #59 of 805 Old 02-09-2019, 08:08 AM
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Is that on an LK990?
No, that is a RS4500. I am just showing that a blue laser based projector should have no issue with color gamut accuracy or coverage. I could show the same thing on the Sony models as well, this just happened to be the most recent one I calibrated.
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post #60 of 805 Old 02-09-2019, 08:25 AM
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Originally Posted by Kris Deering View Post
No, that is a RS4500. I am just showing that a blue laser based projector should have no issue with color gamut accuracy or coverage. I could show the same thing on the Sony models as well, this just happened to be the most recent one I calibrated.
The problem is virtually all blue laser designs for 4K DLP are setup for max brightness - typically the same design from Coretonic which involves blue laser with phosphor wheel and RGBY color wheel equivalent output (B/Y segments are clear to use laser/phosphor respectively and max brightness), no yellow notch filter. Without a more color accurate, wide gamut, high contrast design out of box DLP blue lasers are going to be very bright but very inaccurate and require major calibration to reign in and extra hardware to reach p3.

The HLD LED projectors have been more accurate out of box but it seems they are having issues getting an effective dynamic dimming system in place to max dynamic contrast. Not sure if this is a limitation of the tech (hard to aggressively dim HLD clusters?) or simply lack of effort in design (it's also a Coretonic design).

Sadly Delta has not even attempted a mid-range 4k DLP HT projector which is too bad as their 1080p home theater LED DLPs were great with very effective dynamic dimming.

This Delta design is the closest I've seen to a 4k dlp blue laser optimized for contrast, 2000:1 native & 18000:1 dynamic:
https://www.digitalprojection.com/di...c-u.php?id=862
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Last edited by Ruined; 02-09-2019 at 08:42 AM.
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