Projector vs large TV - Bang for buck
- Thread starter Yucca
- Start date
native or optoma?
I've decided to stick with 1080dunno , whats everyone's thoughts
Even though its clear your are joking. The cheapest officially qualified 4k display I know of that that displays full 4k with the full 8million discrete pixels per refresh cycle is the Optoma UHD550X. It’s been seen for around £1500 to £2000. Price keeps jumping around.
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According to the experts as projectorcentral the amount of native mirrors is irrelevant as long as you can display a native 4k resolution per refresh cycle and pass the native 4k 1:1 pixel mapped line patterns without a native chip. All that matters is a full native 4k resolution is displayed which the Optima officially qualified as, by the CTA group. To quote the experts “No native 4K projector can do any better. Practically speaking, the number of mirrors on the chip is irrelevant if it can put 8.3 million discrete pixels on the screen and fully resolve a 4K 1-pixel line pattern.”dunno , whats everyone's thoughts
A native 4k resolution is 8.3millon discrete pixels on the screen in the same refresh cycle. Officially the Optima has that stamp and passes that test and passed all 1:1 pixel mapped tests I have seen and the 1-pixel line patterns projectorcentral ran .
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This is a bit deceptive - yes it is rendering 8mpx to the screen with a good level of distinction between pixels but it isn't able to display 100% correct pixel values 100% of the time.
The effect is kind of like running native resolution through an interpolating scaler just for the **** of it.
I have yet to find any tests it doesn’t map correctly and the 1:1 line patterns projectorcentral tested all mapped correctly. But you are right I will edit my post to say all test patterns I have seen and line patterns tested by projectorcentral have passed. Are you aware of any patterns that did fail and still fail in the updated versions?
EDIT: I do not own the projector but will have access to one next week.
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Many tests for like chroma resolution, etc. it will "pass" but with minor artefacting. Unlike the afore mentioned "3LCD", etc. it is rendering a lot of detail to the screen just there is some compromise of the exact fidelity of that detail compared to the original - which for stuff like movies, etc. is largely very hard to notice the difference.
According to the experts as projectorcentral the amount of native mirrors is irrelevant as long as you can display a native 4k resolution per refresh cycle and pass the native 4k 1:1 pixel mapped line patterns without a native chip. All that matters is a full native 4k resolution is displayed which the Optima officially qualified as, by the CTA group. To quote the experts “No native 4K projector can do any better. Practically speaking, the number of mirrors on the chip is irrelevant if it can put 8.3 million discrete pixels on the screen and fully resolve a 4K 1-pixel line pattern.”
A native 4k resolution is 8.3millon discrete pixels on the screen in the same refresh cycle. Officially the Optima has that stamp and passes that test and passed all 1:1 pixel mapped tests I have seen and the 1-pixel line patterns projectorcentral ran .
According to many independent reviews and anyone that can do basic maths its not a native 4k projector.
Here's one independent test that describes it not passing.
https://www.soundandvision.com/content/dlps-4k-really-4k
There is also the various white papers on the XPR chips that suggests that the pixels are overlapping....
Oh and of course the clear fact that the projector is not native 4k.
the second half of the 4K image is a shift diagonally no ?
so presumably the contents of those pixels have to be interpolated from the original source 4K media that had a uniform grid of pixels, so does that not impact image 'quality'
(indeed - do all the pixels have to be interpolated.)
which is a good web site to read up on the technology/limitations ?
so presumably the contents of those pixels have to be interpolated from the original source 4K media that had a uniform grid of pixels, so does that not impact image 'quality'
(indeed - do all the pixels have to be interpolated.)
50% of the pixels are interpolated ?
which is a good web site to read up on the technology/limitations ?
Projectorcentral have a good reputation. It should be pointed out there is a difference between a native 4k chip and native 4k resolution. The projector officially qualified as a native 4k resolution not only by Projectorcentral but officially by the CTA group and the 4k specifications. If the CTA say its 4k then its 4k, anyone disagreeing with the CTA group is just being stupid. They are the ones that mandate the specifications and determine what counts and what doesn't.
The amount of native mirrors is irrelevant. No one is calling it a native chip. Anyone that can do basic math can see it displays 8.3 million discrete pixels per refresh rate cycle so counts as full native 4k. Which is why it has the official 4k stamp.
http://www.projectorcentral.com/4k-dlp-projectors.htm
Some examples of the quality
https://tvspro-816a.kxcdn.com/wp-content/uploads/2017/07/color.jpg
https://tvspro-816a.kxcdn.com/wp-content/uploads/2017/07/Overall.jpg
As Projectorcentral said “new 4K projectors featuring TI's 4K DLP chip qualify as native 4K based on the acute precision of the image on the screen, and the ability of each mirror to drive two independent single pixel structures. How they do that is related to some behind-the-scenes technological magic (proprietary to TI) that you will never be aware of.”
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Funny when LG made RGBW LCD panels that wheren't 4k they quoted the ICDM (International Committee for Display Metrology) and the ISO (international organization for standardisation) as saying they where 4k... Even though anyone that looked at how the pixels worked could see you lost resolution compared to a traditional RGB (or oled style RGBW) setup. Who has the definitive word on what image standards are ; the CTA, The ICDM, the ISO? I don't remember any of these organizations being involved with the creation of either 4k or the UHD standards?
Or is Projector central the only website to believed?
Some people would say anyone that thinks you can photograph a projected image to prove its native 4k is stupid.... others might even say anyone spending thousands on a projector that is concerned about pixel details and then projects on a wall is even more stupid....
Have a look at the white paper Barco wrote when they started to use the technology
http://cineramax.com/wp-content/uploads/2016/03/BARCO-whitepaper-4K-UHD.pdf
Hardly looks like a clean process with 1:1 pixel mapping from UHD disk to XPR chip to projected image....Looks like the pixels are overlapping
So guys...... Not sure what you lot are all arguing about but:
1) Will a screen give me a better image than using the wall - General consensus please folks
2) If I get a screen it will be a fixed screen. They seem to range from £250 odd to £700/£800. Any advice on what brand I should go for and why. What does a £700 screen do that a £250 can't?!
3) How long do the bulbs last? Are they expensive to replace?
4) Can projectors be used during the day. Ie daylight coming through windows.
1) Will a screen give me a better image than using the wall - General consensus please folks
2) If I get a screen it will be a fixed screen. They seem to range from £250 odd to £700/£800. Any advice on what brand I should go for and why. What does a £700 screen do that a £250 can't?!
3) How long do the bulbs last? Are they expensive to replace?
4) Can projectors be used during the day. Ie daylight coming through windows.
A screen will usually be better.
The more expensive screens will have a "better" gain, etc. which can really help to bring out black levels - but you really need to match them up with your projector at those kind of price levels to get the best out of them i.e. some projectors will work with varying degrees of grey screens while others won't.
non-LED bulbs are usually <10,000 hours, LED type bulbs usually 20,000+ hours.
Daylight depends a lot projector to projector and just how much and how direct the daylight is plus distance between the projector and screen, etc.
The more expensive screens will have a "better" gain, etc. which can really help to bring out black levels - but you really need to match them up with your projector at those kind of price levels to get the best out of them i.e. some projectors will work with varying degrees of grey screens while others won't.
non-LED bulbs are usually <10,000 hours, LED type bulbs usually 20,000+ hours.
Daylight depends a lot projector to projector and just how much and how direct the daylight is plus distance between the projector and screen, etc.