Is the 0.47DMD same on both 1080P/ 4K PJ's? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 13 Old 05-01-2019, 05:02 AM - Thread Starter
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Is the 0.47DMD same on both 1080P/ 4K PJ's?

Just wanted to clear this one out, is the 0.47 DMD used in 1080p pj's the same as the 0.47 DMD(old) used in 4K pj's + XPR/ Wobulator circuitry to multiply the resolution OR does the 4K 0.47 DMD differ from the 1080p one?

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post #2 of 13 Old 05-01-2019, 07:56 AM
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No. Different part numbers.

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post #3 of 13 Old 05-01-2019, 09:58 AM - Thread Starter
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thanks @sage11x
but could it be this Part# for 0.47/1080p & that part# for 0.47/2160p but uses the same physical component? I know that some electronic vendors do this with some parts.
what are the electronic/ mechanical difference between the two same size chip.

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post #4 of 13 Old 05-01-2019, 10:15 AM
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Is the 0.47DMD same on both 1080P/ 4K PJ's?

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Originally Posted by wheelee View Post
thanks @sage11x

but could it be this Part# for 0.47/1080p & that part# for 0.47/2160p but uses the same physical component? I know that some electronic vendors do this with some parts.

what are the electronic/ mechanical difference between the two same size chip.


You’d have to get into the spec sheets to get the nitty gritty. One obvious change is the 4K unit has a larger pond of mirrors (although they’ve dramatically shrunk this on the second gen chip it’s still larger than the equivalent 1080p).

EDIT: tilt is identical. Also, it appears the HD chipset can accept 120Hz as well so it means that most manufacturers simply don’t support it. Here’s the links to the two product pages.

http://www.ti.com/product/dlp470ne

http://www.ti.com/product/DLP470TE

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Last edited by sage11x; 05-01-2019 at 04:36 PM.
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post #5 of 13 Old 05-01-2019, 04:48 PM
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Edit again.

I got them confused. It’s the older .65 1080p chip (used in the Ht2050A, for example) that has the shallower tilt angle. Only 12 degrees. All the newer DMDs have the more aggressive tilt and smaller pixel pitch.

http://www.ti.com/product/dlp650ne

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post #6 of 13 Old 05-02-2019, 06:58 AM - Thread Starter
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thanks for the spec sheets

I went through it & compared the spec sheets & almost all of the nomenclature is 95% the same.
In the Mechanical drawing specs it's 1:1 identical
So i'm guessing it's in the "External Electronics" that makes the difference between the two, well just a hunch.


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post #7 of 13 Old 05-02-2019, 11:37 AM
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Quote:
Originally Posted by wheelee View Post
thanks for the spec sheets

I went through it & compared the spec sheets & almost all of the nomenclature is 95% the same.
In the Mechanical drawing specs it's 1:1 identical
So i'm guessing it's in the "External Electronics" that makes the difference between the two, well just a hunch.

Huh that's pretty interesting.
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post #8 of 13 Old 05-02-2019, 02:41 PM
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Originally Posted by Jerky_san View Post
Huh that's pretty interesting.


I’m assuming you don’t know how pixel shifting on this generation of projectors works?

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post #9 of 13 Old 05-02-2019, 02:47 PM
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Quote:
Originally Posted by wheelee View Post
thanks for the spec sheets



I went through it & compared the spec sheets & almost all of the nomenclature is 95% the same.

In the Mechanical drawing specs it's 1:1 identical

So i'm guessing it's in the "External Electronics" that makes the difference between the two, well just a hunch.





The really important thing is both the .47 HD, .47 UHD as well as the .66 UHD all use the smaller mirror size (listed as pixel pitch) and the greater tilt angle. Which is why I don’t think the old .65 DC3 DMD is long for this world. Almost all the new budget HD models are using the smaller .47 DMD.

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post #10 of 13 Old 05-02-2019, 02:57 PM
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Basic DLP technology (not including the add-on XPR optical shifting feature) is pretty mature at this stage of development so there really aren't significant differences in the basic DLP chips even if they're the same size. It's pretty much down to fine tuning things like pixel pitch and tilt angle.
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post #11 of 13 Old 05-08-2019, 03:10 AM - Thread Starter
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Quote:
Originally Posted by Dave in Green View Post
Basic DLP technology (not including the add-on XPR optical shifting feature) is pretty mature at this stage of development so there really aren't significant differences in the basic DLP chips even if they're the same size. It's pretty much down to fine tuning things like pixel pitch and tilt angle.
so something like contrast or HDR/ HLG isn't a factor of a better DMD Chip & those are a product of whatever External Electronics & Optics being used? And if that would be the case why can't those vendor improve the so called "black" level the enthusiast are longing for Or are they limited by the ability of the DMD chip?

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post #12 of 13 Old 05-08-2019, 07:29 AM
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Vendors can only improve the black level performance of a DLP projector to the capability limit of the DMD chip itself. All of the other projector peripherals have to be optimized to reach the best possible black level performance the DMD is capable of producing. But the native black levels of the most expensive DLP projectors on the market aren't significantly better than that of <$1,000 DLP projectors. So it seems obvious that the only thing that could substantially improve native black level performance is the DMD itself. If it were easy and inexpensive to substantially improve black level performance of DMDs then after decades of research you would think that Texas Instruments would have already done it in order to capture an even bigger share of the projector market.
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post #13 of 13 Old 05-08-2019, 08:30 AM
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Quote:
Originally Posted by sage11x View Post
Which is why I don’t think the old .65 DC3 DMD is long for this world.
You are most likely correct and I have to say it’s a little sad. I think the technology got pretty darn good with the Dark Chip 3. It got good enough in my case along with bright enough to support a 110” .5 gain gray stealth screen and masking was not needed.

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