LG HU70LAB 4K RGB LED DLP Projector: Hands-On & Review - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 42 Old 04-01-2020, 09:51 AM - Thread Starter
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LG HU70LAB 4K RGB LED DLP Projector: Hands-On & Review

I recently had the opportunity to review the LG HU70LAB 4K LED DLP projector. It's a compact projector that features an advanced 4-channel "wheel-less" design. This is essentially the same projector as the LG HU70LA but it comes in a black enclosure. It's rated to output 1500 lumens and is ceiling-mountable. The MSRP of $1799 puts it in the same price category as a premium 75" TV, making it an attractive option for anyone looking for a much larger picture (up to 140") than a TV provides.

The LG HU70-LAB uses a 4-channel LED light source that features discrete red, green and blue LEDs as well as a fourth "dynamic green" channel. Eliminating the color wheel allows this projector to express extremely vivid color that stays accurate over time.

This projector's lens is sharp, but it is limited in that it does not provide any lens shift functionality. A 1.25X manual zoom is helpful in getting the image to fit, but in the end the options for positioning this projector are limited with ceiling mount being the most likely to work out in many instances. However this projector is also quite compact and can be used as a portable, for example placed on a coffee table and shining on a blank wall.

It's the middle of the day and I cannot black out my living room, but I can already see this projector is nice and bright, and also sharp from edge to edge. It's a DLP so I don't expect miracles in terms of contrast, but the colors look vivid yet accurate right out of the box.

My very first impression is that the simple, somewhat limited lens does have the fringe benefit of being high quality (no visible chromatic aberration or geometric distortion) so there's a give-and-take versus a highly adaptable lens like you'd find on an Epson or Sony. Main thing is, if you can find a good spot for this projector, it appears to be a solid performer for a 4K DLP.

More coming soon, I have to wait for the sun to set to see what this projector is able to do.

I'm using this projector with a Seymour Screen Excellence Ambient Visionaire screen with it (0.9 gain, ALR, 110" diagonal 16:9).

Please feel free to ask any questions in the comments below as I get into my hands-on with this unit.




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Last edited by imagic; 05-17-2020 at 09:25 PM.
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post #2 of 42 Old 04-01-2020, 12:09 PM
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The lack of any lens shift makes this a no buy for me. Especially for $1800.
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post #3 of 42 Old 04-01-2020, 03:33 PM
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I read reviews that it uses a .47in chip and others .66in. Which one is accurate?
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post #4 of 42 Old 04-01-2020, 06:00 PM - Thread Starter
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Quote:
Originally Posted by blee0120 View Post
I read reviews that it uses a .47in chip and others .66in. Which one is accurate?
It's not listed in any specifications, so I'm going to have to ask LG and see if I get an answer.
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post #5 of 42 Old 04-01-2020, 06:02 PM
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Originally Posted by imagic View Post
It's not listed in any specifications, so I'm going to have to ask LG and see if I get an answer.
Ok. Thanks. On their homepage, it has the LG HU70LA with 1527 x 2715, which indicates a .66in chip. However, the reviews state differently.
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post #6 of 42 Old 04-01-2020, 06:20 PM - Thread Starter
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Quote:
Originally Posted by WayneJoy View Post
The lack of any lens shift makes this a no buy for me. Especially for $1800.
It seems LG's own marketing acknowledges this by either showing it ceiling mounted, or else on a table or stool projecting on a blank wall. It's not a dedicated home theater projector. It would be nice to see the light engine from this projector paired with a more sophisticated lens. FWIW current price is $1600 (there's a $200 discount in effect).
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post #7 of 42 Old 04-01-2020, 07:15 PM
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Black version????

Thank you for your review.

I changed from Benq HT3550 to this LG HU70LA over 4 months, the picture quality and system stable are huge upgrade!

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post #8 of 42 Old 04-01-2020, 07:21 PM
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Quote:
Originally Posted by blee0120 View Post
I read reviews that it uses a .47in chip and others .66in. Which one is accurate?
As I know HU70LA uses 0.47 DMD and HU85LA UST uses 0.66 DMD.

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post #9 of 42 Old 04-01-2020, 07:24 PM
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Quote:
Originally Posted by blee0120 View Post
Ok. Thanks. On their homepage, it has the LG HU70LA with 1527 x 2715, which indicates a .66in chip. However, the reviews state differently.
May I have the link, I can't find this information.

Thank you.

Edit: I found that picture, Thank you! I think they just share the same picture with HU85LA, as HU85LA provides from contrast and resolution than HU70LA significantly.

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post #10 of 42 Old 04-01-2020, 07:28 PM
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And I have no idea why LG doesn't mention HI70 and HU85 support HLG, at least it support the HDR (HLG) shot by my Sony Z1.

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Anthony Chan
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post #11 of 42 Old 04-01-2020, 07:53 PM
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Quote:
Originally Posted by chhanthony View Post
May I have the link, I can't find this information.

Thank you.

Edit: I found that picture, Thank you! I think they just share the same picture with HU85LA, as HU85LA provides from contrast and resolution than HU70LA significantly.
Ok. That's kind of confusing to do. I was thinking this projector is a major deal for the price. But I'm sure its still nice and sharp
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post #12 of 42 Old 04-01-2020, 08:34 PM
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Quote:
Originally Posted by blee0120 View Post
Ok. That's kind of confusing to do. I was thinking this projector is a major deal for the price. But I'm sure its still nice and sharp
But here is a tricky thing, HU70LA accept 4096 x 2160 resolution from CalMan VideoForge Pro. I don't know whether 0.47 DMD will accept this kind of resolution as I never test with my previous HT3550 but menu says the highest resolution is 3840 * 2160

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post #13 of 42 Old 04-01-2020, 10:47 PM
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Is it a true 4K or a pixel shifter?

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post #14 of 42 Old 04-02-2020, 12:23 AM
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Is it a true 4K or a pixel shifter?
Pixel shifter with 8 million adressable pixels. So it's up to the required standard.

The only native 4K models are LCoS fron Sony and JVC.

4K pixel shifters can be as sharp as native 4K on the LCoS. Sharpness is impacted by other factors other than the type of 4K technology used.
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post #15 of 42 Old 04-02-2020, 05:01 AM
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Pixel shifter with 8 million adressable pixels. So it's up to the required standard.

The only native 4K models are LCoS fron Sony and JVC.

4K pixel shifters can be as sharp as native 4K on the LCoS. Sharpness is impacted by other factors other than the type of 4K technology used.
There are native 4K (and higher) dlp projectors too (which are far sharper than the native 4k lcos ones) but they start at $25k+:

https://www.barco.com/en/product/bragi%20cinemascope
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post #16 of 42 Old 04-02-2020, 06:37 AM
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Quote:
Originally Posted by WayneJoy View Post
The lack of any lens shift makes this a no buy for me. Especially for $1800.
How about a 4K DLP model with powered lens controls and lens memory?
Both JVC and Sony have had them standard for years...
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post #17 of 42 Old 04-02-2020, 09:02 PM
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Here's a review:

https://audiovision.de/lg-largo-4k-hu70ls-test/ (use google translate for language of choice).

They claim 1430 lumens uncalibrated and 1000 calibrated, and .42 lumens minimum which is over 2200-1 contrast.
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post #18 of 42 Old 04-03-2020, 02:17 AM
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Sorry but I can’t find anywhere 2200:1 contrast ratio, it’s reported 300:1 after calibration.
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post #19 of 42 Old 04-03-2020, 04:47 AM
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Sorry but I can’t find anywhere 2200:1 contrast ratio, it’s reported 300:1 after calibration.
Schachbrett = 300-1 = checkerboard or ANSI contrast = 300-1
EBU = 500-1 = modified ANSI contrast (IIRC it's a 40% black and 60% white.

Helligkelt Kalibriert= Maximum calibrated brightness = 1000 lumens

schwarzwert = black level = .42 lumens.

1000 / .42 = 2381-1 on/off contrast ratio.

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post #20 of 42 Old 04-03-2020, 05:12 AM
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Schachbrett = 300-1 = checkerboard or ANSI contrast = 300-1
EBU = 500-1 = modified ANSI contrast (IIRC it's a 40% black and 60% white.

Helligkelt Kalibriert= Maximum calibrated brightness = 1000 lumens

schwarzwert = black level = .42 lumens.

1000 / .42 = 2381-1 on/off contrast ratio.
What is the difference between the 70LA/B and LS?


That on/off contrast is similar to what the HT3550 can do. I wonder why some of the people that reviewed (the LG) said it has weaker blacks.

How does the active iris on the Benq compare to the dynamic (?) or dimming functions on the LG?
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post #21 of 42 Old 04-03-2020, 05:44 AM
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Originally Posted by noob00224 View Post
What is the difference between the 70LA/B and LS?


That on/off contrast is similar to what the HT3550 can do. I wonder why some of the people that reviewed (the LG) said it has weaker blacks.

How does the active iris on the Benq compare to the dynamic (?) or dimming functions on the LG?
I'm just translating the article but it seems that the HT3550 and a DI might do a bit better. The LS seems to be a newer model with higher output but maybe it's just the EU designation?

Chris Eberle reported that the dynamic contrast was difficult to measure with the standard static test patterns, but that it seemed better with actual content.
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Originally Posted by DunMunro View Post
I'm just translating the article but it seems that the HT3550 and a DI might do a bit better. The LS seems to be a newer model with higher output but maybe it's just the EU designation?

Chris Eberle reported that the dynamic contrast was difficult to measure with the standard static test patterns, but that it seemed better with actual content.
Shouldn't the LED source act as an instant iris?
Is it due to it's implementation?
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post #23 of 42 Old 04-03-2020, 09:13 AM - Thread Starter
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For those who asked, LG says it is a 0.47" DMD chip in this unit.

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post #24 of 42 Old 04-03-2020, 10:06 AM
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So this does not support Dolby Vision at all.
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So this does not support Dolby Vision at all.
No projector currently does.
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post #26 of 42 Old 04-03-2020, 10:48 AM
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So this does not support Dolby Vision at all.
More succinctly, Dolby Vision doesn't support projectors.
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Thank you
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Quote:
Originally Posted by noob00224 View Post
Shouldn't the LED source act as an instant iris?
Is it due to it's implementation?
Theoretically, yes but currently it seems that only the BenQ HT9060 has implemented it, at least in a traditional way where it can be measured with static test patterns, although the BenQ uses a very modest dimming.
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Quote:
Originally Posted by imagic View Post
For those who asked, LG says it is a 0.47" DMD chip in this unit.
Thanks for the update
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post #30 of 42 Old 04-04-2020, 05:38 AM
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The only difference between this 2020 model from last years white case model on the lg website is that its black not white. My question would be has the new model improved in anyway. You would think lg would have shown that on the marketing and web site if it had.

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