From the photos and video, only a small section of the screen has colour. Does that change as you move around, or is the coloured section static?
Off topic, but the visual effect seen here is a lot like how my memories and dreams feel; only the thing I'm currently focussing on has any colour or detail, whilst everything else is muted and fuzzy.
I'm wondering if I can get acetate that's ever so slightly adhesive, so it sticks better to the monitor, which I'm wondering might help the colours show better all over.
Or, maybe the electron beam scatters more as it's deflected to hit the the outer pixels, possibly giving you a signal too muddy for your magic potato pixels to work with.
(these are obviously just vague guesses, I didn't even know this was possible before today)
I am annoyed when I get woken up from a good meal. :)
(On the flip side, I can technically breath underwater in my dreams, but I feel the water going into my lungs so it isn't pleasant!)
The system was called NuColor, if you want more detail.
The Bayer filter method in TFA is sensitive to perfect alignment between the filter and the image, which proved impractical in the real world. Sure makes for a neat experiment, though.
How does it work? Do they hand paint the screen? How does it actually add red or blue to an arbitrary shade of gray which lacks any chroma? Does it work with video too?
Imagine that each grain is blocking a 'pixel' of the negative. For simplicity of this explanation, I'll pretend the grains are red, green, and blue. If there's a blue grain, only blue light can get through, and thus the luminance is baked in specific to the amount of blue in that region. The same is true for the red, and the green.
Thus, each 'pixel' of the negative isn't determining a monochromatic luminosity (ie black and white), but instead telling the luminosity of a single channel of red, green, or blue.
When the grain filter and the developed negative are combined, we get natural colour. The same filter is used for generation and display.
Another way to think of it is like this: Each pixel on our screen is actually 3 subpixels, each defining red, green, and blue, and we format our image to alternate between telling the red, green, and blue channels how bright to be. This is doing the same, but the subpixels are distributed randomly because that's much easier to make.
If you organise the grains in a geometric pattern, you get Dufaycolor.
I may be daft, and your explanation sounds reasonable but I still feel "magic + potato starch" :-D
The starch grains were randomly scattered on one side of the photographic plate, and acted as filters so that small portions of the plate would capture certain colors. The plate was then developed as a positive image.
When you would shine light through the developed plate it would go through the starch grains (still on the plate) as well as the developed image. The developed image controls the luminosity while the colored starch grains again act as a filter and control the hue of the transmitted light, roughly reproducing the original scene.
This part is key to understanding. The plate with the starch-based colored mosaic is not simply a filter used upon capture to be removed after (as most filters are today), but also a filter to be used upon viewing. Since the same exact “filter” is used for both capturing and viewing of a given photograph, it allows the mosaic to be random, simplifying creation of the filter.
Such that it might be plausible for outdoor scenery, but useless otherwise.
EDIT: warning! strobing!
The effect is much reduced if I tap on the image to make it full screen on mobile. The larger size seems to reduce the velocity of the spin, which seems to be an essential part of it. Could this be the reason you don't see it, are you perhaps on a low performance device for eg.?
Just for the sake of completion, the effect is incomplete for me - the outer black bands are always brown, but the inner two switch between black and brown. The middle one is more often black than brown, but it seems when that one's brown, the innermost one instead turns black.
Speculations on why medical monitors might be that bright: they can probably be better read in brightly-lit medical settings, shine through overlays and negatives placed over them, and be more easily read by some patients with poor vision.
They also offer palettized grayscale: up to 1,024 tones from a palette of 16,369. I'm not sure how useful that is in practice, but is is a unique feature.
From their website --
> 10-Bit Simultaneous Grayscale Display
> 10-bit (1,024 tones) simultaneous grayscale display extends grayscale fidelity to the boundaries of human visual perception abilities and helps radiologists discern the finest nuances within an image.
Get some large format color negative film and thin cyan, magenta, and yellow filters. Put a cyan filter on the LCD, followed by the film on top. In a darkroom, light up the "red" pixels and to expose that part of the film. Repeat with the magenta filter and "green" pixels, and finally the yellow filter and "blue" pixels. Develop the film and reattach to the LCD.
This is kind of how the shadow mask was made in color CRT monitors. A photographic process was used to put the red, green, and blue phosphor dots on the screen by shining light through the shadow mask from the same angles the electron guns would later illuminate the phosphors. This ensures that the red, green, and blue phosphor dot pattern lines up (fairly) accurately with the shadow mask.
It would be nice if the author explained a bit more how he printed those pdfs to such a resolution and precision. Is a home printer sufficient ?
https://github.com/anfractuosity/rainbow/blob/master/rainbow... is the code that I created to generate the pattern.
A home printer may work also though, as they're pretty high resolution these days, I just don't have an inkjet printer at the moment.
I'm kind of curious about https://en.wikipedia.org/wiki/Duratrans too, instead of acetate and ink, but they seem very dear.
It took a minute or so to capture the image, but then it was like Kai Power Goo in non-Newtonian hardware!