100% fade to black with Digishutter pro 1.0 - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 22 Old 08-06-2017, 01:41 AM - Thread Starter
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100% fade to black with Digishutter pro 1.0



100% fade to black with Digishutter pro 1.0 on digital projectors, is something i have been looking for after going digital form CRT along time ago.
I have the pleasure to test out this funny fantastic idea, to get stray light form the projector to disappear then only with 0 IRE.
I cant stand the grey on screen when it shall be black in my opinion.
This Digishutter pro 1.0 is under testing/development and improvements done after observation.
Have tested it now for some days, and can just say that extremely cool, and just love it.
On JVC this look very good, because the extreme high on/off, and iris that "almost" make it totally black.
I have now a JVC RS520.
On a DLP/ SXRD/ or other than D-Ila you will think that your projector died. This because of grey not black.
Digishutter pro 1.0 have its own HDMI, so clean untouched Blu-ray or UHD signal.


Sending up some Pictures and a little film to show how this work. More info will come














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post #2 of 22 Old 08-06-2017, 04:59 AM
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Very cool.

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post #3 of 22 Old 08-06-2017, 05:41 AM
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Excellent idea, had a similar idea many a year ago.

Much simpler than yours though. A photo cell could be user calibrated/adjusted to set fade to black levels for ones particular setup. The cell facing the lens area.

The shutter was to have two horizontal V's that would close or open as required, but due to it's cross over action would act and appear more like an iris.

Good luck with this. Perhaps you could licence this to projector manufacturers. High time they incorporated full fade to black in lamp based projectors.
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post #4 of 22 Old 08-06-2017, 06:11 AM - Thread Starter
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This is not my creation , but something I have wanted for many years with digital projectors. But the effect is fantastic.. And now working on 3 more.
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Last edited by Dj Dee; 08-06-2017 at 02:23 PM.
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post #5 of 22 Old 08-06-2017, 05:51 PM
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Quote:
Originally Posted by Dj Dee View Post
This is not my creation , but something I have wanted for many years with digital projectors. But the effect is fantastic.. And now working on 3 more.
Cool! Does your contact intend to commercialize this?

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post #6 of 22 Old 08-07-2017, 07:07 AM - Thread Starter
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Originally Posted by Highjinx View Post
Cool! Does your contact intend to commercialize this?

We have to see, right now it has a high cost. But the result of it is extremely good. And the feeling of it is just like I want it in my cinema.
But I have always liked the total darkness when no info in picture.
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post #7 of 22 Old 08-07-2017, 07:11 AM
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Would be cool if he posted an instructable so we could build our own.. Looks like all off the shelf stuff in there..

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post #8 of 22 Old 08-07-2017, 10:15 AM - Thread Starter
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Originally Posted by airscapes View Post
Would be cool if he posted an instructable so we could build our own.. Looks like all off the shelf stuff in there..

I'm technical, but this was far over my understanding. Also some programming that would make this impossible for me to do.

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post #9 of 22 Old 08-07-2017, 10:28 AM
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Quote:
Originally Posted by Dj Dee View Post
I'm technical, but this was far over my understanding. Also some programming that would make this impossible for me to do.
ask your friend to send one over to the US for a viewing

this makes the most sense on a JVC with high native and the clamped iris on a FTB. It would likely be too noticeable on a lower native projector even with a good DI.

Can it handle UHD sources?

did you used to own a VW100 as well?
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post #10 of 22 Old 08-07-2017, 11:48 AM - Thread Starter
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Originally Posted by zombie10k View Post
ask your friend to send one over to the US for a viewing

this makes the most sense on a JVC with high native and the clamped iris on a FTB. It would likely be too noticeable on a lower native projector even with a good DI.

Can it handle UHD sources?

did you used to own a VW100 as well?

"ask your friend to send one over to the US for a viewing "
I cant promise that yet


You are right high on off is useful, because of the shock you get on low on/off projectors like DLP. But a good working iris will help some. Look strange from grey to completely black.


So far handle 4K UHD 4.2.2 BT2020 12 bit, like I have it now.
Full 4.4.4 12 bit is already fixed.


Yes I had Sony VW1000 and VW1100, but switched to a JVC RS600 and now RS520. Loved the Sony VW1100 but now its JVC

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post #11 of 22 Old 08-07-2017, 12:07 PM
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Quote:
Originally Posted by Dj Dee View Post
I'm technical, but this was far over my understanding. Also some programming that would make this impossible for me to do.
looks like an Arduino in there.. piece of cake to program and of course he could just post the code in the instructable.. https://www.instructables.com/
Don't think it is all the "complicated" Just not sure how to monitor a digital video signal.. but the logic is loop, sleep fraction of millisecond, check pin, if level of pin x = y then run code to move stepper motor to closed position sleep and loop back to beginning, if pin x is no longer y, mv stepper motor open.. repeat forever Rather simple, but the devil is in the details!
Guessing he converts the signal to analog so as he can measure a voltage.. a quick google tells me 0% is 0 volts in analog.. So on the right there looks like HDMI to VGA/composite adapter with 2 wires going to the Arduino knock off, purple to an analog pin and red to ground if the pins are the same as the uno. Digital pin on the opposite side of the arduino is controlling the stepper.. Not sure what the other parts are with HDMI cables connected.. Maybe some processing so as to time the external iris with the internal video processing?

As to using this with Non JVC I think it would work fine with the planar. When I get a fast fade to back, takes a couple of seconds for the eyes to adjust ..

If he does not make this into a business, I would like to try building one if he is willing to share the design and code..

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post #12 of 22 Old 08-07-2017, 12:11 PM
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Quote:
Originally Posted by Dj Dee View Post
"ask your friend to send one over to the US for a viewing "
I cant promise that yet


You are right high on off is useful, because of the shock you get on low on/off projectors like DLP. But a good working iris will help some. Look strange from grey to completely black.


So far handle 4K UHD 4.2.2 BT2020 12 bit, like I have it now.
Full 4.4.4 12 bit is already fixed.


Yes I had Sony VW1000 and VW1100, but switched to a JVC RS600 and now RS520. Loved the Sony VW1100 but now its JVC

Are there mucj of a difference from the 600 going to the 520?
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post #13 of 22 Old 08-07-2017, 11:01 PM - Thread Starter
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Are there mucj of a difference from the 600 going to the 520?
Had a heavy side by side before changing.
No microscopic difference. Why I picked the rs520, it had no bright corners.

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post #14 of 22 Old 08-07-2017, 11:56 PM
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Originally Posted by Dj Dee View Post
Had a heavy side by side before changing.
No microscopic difference. Why I picked the rs520, it had no bright corners.

Plus, its cheaper. My 520 has none as well.
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post #15 of 22 Old 08-08-2017, 03:15 AM
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I guess I don't understand fade to black.
How can that possibly work while watching a movie, it does not move fast enough.
dan

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post #16 of 22 Old 08-08-2017, 03:26 AM
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I guess I don't understand fade to black.
How can that possibly work while watching a movie, it does not move fast enough.
dan
This can move almost as fast as a a dynamic iris does, but can block light 100% for those moments.

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post #17 of 22 Old 08-08-2017, 05:19 AM
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I guess I don't understand fade to black.
How can that possibly work while watching a movie, it does not move fast enough.
dan
It is not an external iris, just a lens cover for when there is zero content in the video signal, such as just before the credits roll or between commercials.
Not often that you hit 0% within a movie and if you do it will be a fade most likely. This would not move unless there was 0 visible content in the signal and then block the stray light that give you the slight gray glow. It's bang for the buck is very limited if the cost is high in my opinion.. however former CRT owners probably would disagree.
I still would like to build one just for the fun of it!
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post #18 of 22 Old 08-08-2017, 08:00 AM
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Originally Posted by Highjinx View Post
This can move almost as fast as a a dynamic iris does, but can block light 100% for those moments.
Never had a DI yet, just assumed they worked really fast during a movie
dan

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post #19 of 22 Old 08-08-2017, 10:07 AM - Thread Starter
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Fade 2 black is the same as good night

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post #20 of 22 Old 08-08-2017, 10:42 AM - Thread Starter
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This was the beginning of this project, fun to see how extremely much better the product has become.




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post #21 of 22 Old 08-08-2017, 10:56 AM
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Quote:
Originally Posted by airscapes View Post
It is not an external iris, just a lens cover for when there is zero content in the video signal, such as just before the credits roll or between commercials.
Not often that you hit 0% within a movie and if you do it will be a fade most likely. This would not move unless there was 0 visible content in the signal and then block the stray light that give you the slight gray glow. It's bang for the buck is very limited if the cost is high in my opinion.. however former CRT owners probably would disagree.
I still would like to build one just for the fun of it!
thanks
dan
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post #22 of 22 Old 08-15-2017, 11:00 AM - Thread Starter
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Final adjustments are going to be done tomorrow. Will be around 50% quicker shut and open, and some more small adjustments.

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Last edited by Dj Dee; 08-18-2017 at 01:05 AM.
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