JVC RS4500 (native 4K laser projector)

[AVSMike]

Getting full fade to black and am not seeing the jump in the brightness when going from a dark scene to a bright scene. Now running mode 2 on dynamic dimming.

[mark_h]

Also, not seeing the jumps with 1.10, but there is NO full fade to black.  Retested this today, all three laser modes (iris 0), with a 0 IRE test pattern.  My screen remains brighter than the room...  My old Sony 1000 had a significantly [better] fade to black than the Z1.

[AVSCraig]

Also, not seeing the jumps with 1.10, but there is NO full fade to black.  Retested this today, all three laser modes (iris 0), with a 0 IRE test pattern.  My screen remains brighter than the room...  My old Sony 1000 had a significantly [better] fade to black than the Z1.

Same with actual fades to black in movies ?

[mark_h]

Same with actual fades to black in movies ?

Same.  Mike suggested on AVS to try the hide button.  Same thing - screen is still lit up in my room, which is a black velvet pit, with no light sources.  This projector cannot do true fade to black.  With the Sony 1000 I was left blind for a few seconds on fade to black, but with the Z1 it's a momentary thing as eyes adjust to the dark, but still lit screen, so no good for extended black scenes.

[Dylan Seeger]

It's interesting to hear Mike's projector acting differently compared to others. He's posted pictures over on the other forum that shows his unit does indeed do a FFTB with the laser shutting off. I hope Mike can figure out what's causing this discrepancy.

[AVSMike]

Also, not seeing the jumps with 1.10, but there is NO full fade to black.  Retested this today, all three laser modes (iris 0), with a 0 IRE test pattern.  My screen remains brighter than the room...  My old Sony 1000 had a significantly [better] fade to black than the Z1.

Make sure you are using dynamic dimming mode 2. If you are using mode 1, it will not act the same.

[AVSCraig]

Make sure you are using dynamic dimming mode 2. If you are using mode 1, it will not act the same.

I had enough time last night after getting home, to download the firmware. No real time to test anything after a 9 1/2 hour drive and over 30 minutes to download the firmware into the projector. I'll do some testing tonight.

[mark_h]

Make sure you are using dynamic dimming mode 2. If you are using mode 1, it will not act the same.

Already tested, and no full fade for me with mode 2 either.  Very strange indeed.

[AVSCraig]

Already tested, and no full fade for me with mode 2 either.  Very strange indeed.

I'm just as interested to see if mode 2 dimming is improved. The Revenant tripped up mode 2 pretty bad ( mode 1 however worked fine ), so I'll throw that on tonight.

[AVSCraig]

I just tested the scenes in the Blu Ray " Inglorious Bastards ", in the bar in the basement, where our Nazi impostors are being questioned by a real Nazi, and the scene switches quickly back and forth. A forum member here pointed to this as a torture test for dynamic irises ( I'm going to remember this one - good test ). Every time it switched from the impostors at the table ( bright ), to the real Nazi standing at the end of the table ( dark ), I could see the laser dimming " flick " closed ( mode 2 ) prior to the new firmware. With the new firmware update, I could barely see one instance of the dimming working, then it was totally seamless.
Settings - mid laser, mode 2 dimming, -7 manual iris, Natural user mode.

The Revenant was a 4K movie where I could also see mode 2 dynamic dimming working too much ( mode 1 worked well though - only saw it misbehave maybe 2 or 3 times in 2 hours ). Anyway, while I did not watch the entire movie today ( it's a work day after all, although this is technically work ), what I did watch showed zero dynamic dimming artifacts.   
Settings - mid laser, mode 2 dimming, -4 manual iris, HDR user mode.

My other settings are close to Kris's - http://www.soundandvision.com/content/jvc-dla-rs4500-d-ila-projector-review-settings#LebbB8ogXHvEyhOp.97

[DavidHir]

I just tested the scenes in the Blu Ray " Inglorious Bastards ", in the bar in the basement, where our Nazi impostors are being questioned by a real Nazi, and the scene switches quickly back and forth. A forum member here pointed to this as a torture test for dynamic irises ( I'm going to remember this one - good test ). Every time it switched from the impostors at the table ( bright ), to the real Nazi standing at the end of the table ( dark ), I could see the laser dimming " flick " closed ( mode 2 ) prior to the new firmware. With the new firmware update, I could barely see one instance of the dimming working, then it was totally seamless.
Settings - mid laser, mode 2 dimming, -7 manual iris, Natural user mode.

Out of curiosity, I'll have to test this on the LS10000.  Great movie.

[lygren]

Just updated firmware too, watched a number of scenes today where laser "flickering" was very apparent and visible pre 1.01 and I did not once see the iris pulsate! Good work JVC! I will continue to look for artifacts, but even if I am still able to reproduce it it´s probably no longer any big deal. Also, one of the clips I had a look at today was the intro scene in Gravity; iris open, dimming at 2, 13 ft wide screen; truly stellar image quality, starting to like this JVC beast more and more..... NOW - if they could only get that dreaded static and terribly projector unfriendly HDR upgraded to the dynamic Dolby Vision once available (it´s supposed to be possible to run through software too...) I won´t have to purchase Z2 next year either, let´s hope JVC appreciated us laser pioneers and feeds us some additional (firmware) goodies!?!

[lygren]

...problem with allowing firmware update to Dolby Vision, when come to think of it, is probably license cost... In such case; I also own a Tesla and I encourage JVC to think like mr. Musk; giving stuff away makes for loyal all the way!! 3 years of driving a Tesla I am yet to pay any roaming cost for data download, they gave me free Spotify a year ago and new features appear all the time... I´d be more than willing to pay a fee for a more functional HDR feature too by the way; highlights sub-programmed at a per frame level just makes so much more sense from a technical and logical standpoint than simply ripping the entire movies off of most of its dynamics to give room for the current HDR bull...

[AVSCraig]

...problem with allowing firmware update to Dolby Vision, when come to think of it, is probably license cost... In such case; I also own a Tesla and I encourage JVC to think like mr. Musk; giving stuff away makes for loyal all the way!! 3 years of driving a Tesla I am yet to pay any roaming cost for data download, they gave me free Spotify a year ago and new features appear all the time... I´d be more than willing to pay a fee for a more functional HDR feature too by the way; highlights sub-programmed at a per frame level just makes so much more sense from a technical and logical standpoint than simply ripping the entire movies off of most of its dynamics to give room for the current HDR bull...

The question is will there be DV on 4K UHD Blu Ray before I amass any more movies ? I'm already up to about 40 titles.

[AVSCraig]

I must say the the HDR user preset has made me happy to just " plug and play " 4K UHD BR's at ths point. I think they look great !