JVC RS4500 (native 4K laser projector)

[ARROW-AV]

Especially when all the other improvements are taken into account. I just watched " Deepwater Horizon " in 4K on my RS600. Going to have to use this as a test disc when I get the RS4500. Stellar picture quality.

Poor you Craig, having to make do with a RS600 until you receive your RS4500! How on earth are you coping?

[ARROW-AV]

Digital 17 is not an issue with the 4500 like it is with other models.

Good to know

[Andreas21]

Hi Kris,

I just used the AVS709HD patterns, they have 0% black, 1% grey, 2%, 3%, 4% grey fields etc. It will at least tell you the luminance levels at those points, then when divided into the white peak you have a number.

I would be interested in those measurements with a chart similar to what projection dream uses, but I don't know where to get those.

To do this correctly you need to use the Projectiondream approach and ask them for the patterns. I asked for them a while ago, but I had no luck.

[Kris Deering]

To do this correctly you need to use the Projectiondream approach and ask them for the patterns. I asked for them a while ago, but I had no luck.

I asked Stacey Spears to come up with some patterns that effectively do the same thing, I'm hoping he'll include them on his next test disc. Doing it the way Javs mentioned works too for his application, because it is an apples to apples comparison with how he measured his.

[AVSCraig]

Poor you Craig, having to make do with a RS600 until you receive your RS4500! How on earth are you coping?

I'm managing. 

[AVSMike]

Was told my RS4500 will ship in the next few days.

[Kris Deering]

Could be that, or, could be the dimming playing some part, I dont get why this is not infinity if dimming was on.

Oh I think you could probably figure out why.

[Javs]

Oh I think you could probably figure out why.

No, I am really not sure why

Did you turn off dimming for the 0% measurement by chance?

Or is it because dimming does not actually fully switch off the lasers at 0%? If that is the case, that is slightly alarming.

It may have to do with what looks better vs what specs better.

[Kris Deering]

Dimming was on

[Javs]

Dimming was on

Well now I am suitably confused as to why 0% measured any black at all, should it not be completely off with 0%?

Thanks for doing those measurements by the way, that is very impressive and certainly don't seem to be giving up on too much with regards to 1 through 4%.

[ARROW-AV]

Well now I am suitably confused as to why 0% measured any black at all, should it not be completely off with 0%?

Thanks for doing those measurements by the way, that is very impressive and certainly don't seem to be giving up on too much with regards to 1 through 4%.

In short, this is why 'INFINITE' contrast ratios are B.S.

[Javs]

In short, this is why 'INFINITE' contrast ratios are B.S.

Nonsense.

The LS10k literally shuts off at 0%. I have stared directly into the lens while it does this.

Im just confused as to why the Z1 didn't apparently do this if 0% was projected and dimming was confirmed to be on.

[Kris Deering]

Unlike the Epson, it doesn't turn completely off. So you don't get that jarring off/on with fades or dark sequences but you also don't get a true infinite black.

[Javs]

Unlike the Epson, it doesn't turn completely off. So you don't get that jarring off/on with fades or dark sequences but you also don't get a true infinite black.

Ok I see. Thanks.

[AVSMike]

Nonsense.

The LS10k literally shuts off at 0%. I have stared directly into the lens while it does this.

Im just confused as to why the Z1 didn't apparently do this if 0% was projected and dimming was confirmed to be on.

While some like the LS10000's ability to go to absolute black, several have complained about the sudden jump in brightness when the laser comes back on. So you can either go for the absolute spec or you can go with what works the best. Of course in a perfect world, we would have both, but looks like you can't have your cake and eat it too. At least not yet.