Comment on [Technology Connections] Video projectors used to be ridiculously cool [34:39]

probable_possum@leminal.space ⁨1⁩ ⁨day⁩ ago

• dual_sport_dork@lemmy.world ⁨1⁩ ⁨day⁩ ago

  The micromirror arrays are the wildest of the bunch to me. That is just such a prima facie batshit insane idea and it’s astonishing that it actually works.

  “Yeah, we need to be able to individually display and shut off these pixels, so we’re going to go ahead and design a chip with 6,220,800 tiny mirrors that physically tilt when you poke them with electricity. Rather than, I don’t know, literally any other solution that presents itself.”

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  • Krudler@lemmy.world ⁨1⁩ ⁨day⁩ ago

    It sounds insane, but the array that drives it is functionally not that different from the array that individually causes LCD crystals to shift.

    I have DLP parts sitting around because they’re cool.

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    • spazzman6156@sh.itjust.works ⁨1⁩ ⁨day⁩ ago

      Woah that color wheel… You can see the cyan, magenta, yellow light reflecting but red, green, blue light passing through to the table, respectively. Such a great example of complementary primaries

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      • Krudler@lemmy.world ⁨1⁩ ⁨day⁩ ago

        I’m so happy you noticed, the colors cannot be reproduced in a digital photo, when it shines in the sun it’s so beautiful!

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    • probable_possum@leminal.space ⁨13⁩ ⁨hours⁩ ago

      What’s the 4th color on the wheel used for? White minus white… black, yes. But why?

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      • Krudler@lemmy.world ⁨13⁩ ⁨hours⁩ ago

        Straight answer, I don’t know lol

        Image

        Image

        There is no way that the pictures I’ve snapped can produce the colors accurately. When I look at that small section, it reflects forest green light back to my eye. The light that passes through seems to be muddy yellowish

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  • TimeSquirrel@kbin.melroy.org ⁨1⁩ ⁨day⁩ ago

    There was an idea I read about (might have been Popular Science or something like 25 years ago) where they came up with an idea for a jet that didn't use traditional control surfaces like ailerons, but rather line the wings and fuselage in thousands of tiny flaps that would all be precisely computer controlled. It would be able to basically mold and shape the airstream around itself to make precise movements.

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    • Krudler@lemmy.world ⁨14⁩ ⁨hours⁩ ago

      You are totally remembering correctly! I recall this as well, but the hype died out quickly.

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  • MonkderVierte@lemmy.zip ⁨20⁩ ⁨hours⁩ ago

    There was a micromirror e-paper too. Though i don’t think they got a reader on market. Got bought up by E Ink corp, like everythiing else e-paper.

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  • SaveTheTuaHawk@lemmy.ca ⁨1⁩ ⁨day⁩ ago

    still used for a type of advanced microscopy.

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    • Krudler@lemmy.world ⁨13⁩ ⁨hours⁩ ago

      I could also see DLP being applied in new QM research… lasers are being increasingly used to trap and manipulate atomic nuclei

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• acosmichippo@lemmy.world ⁨1⁩ ⁨day⁩ ago

  So they used to be ridiculously cool, but they’re still ridiculously cool too.

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• Beacon@fedia.io ⁨1⁩ ⁨day⁩ ago

  RGB flashing sequentially is the wooooooorst. Most people can't see it but holy shit i can and it's like random colored strobes flashing everywhere. Bleh

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  • probable_possum@leminal.space ⁨13⁩ ⁨hours⁩ ago

    Yes, I could tell if dlp, whenever my eyes moved.

    They fixed the issue by increasing the color changing frequency in led beamers.:)

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    • Beacon@fedia.io ⁨12⁩ ⁨hours⁩ ago

      I still see it in even the most modern projectors, but I'm also able to see the flicker in phones that use pwm dimming which only a very small percent of people can see, so sucks to be me. My eyes seem to work at a much higher image capture rate than most people, which has no apparent benefits, only problems

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  • Steve@startrek.website ⁨1⁩ ⁨day⁩ ago

    I believe the crt projector doesnt have that issue

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    • Beacon@fedia.io ⁨1⁩ ⁨day⁩ ago

      I was referring to the spinning color wheel that op was taking about, but yeah the simultaneous three color projector likely doesn't have that problem

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    • Krudler@lemmy.world ⁨13⁩ ⁨hours⁩ ago

      I’m going to actually you lol

      The reason it works better with CRT is because of the phosphors. They continue to glow, long after the signal has passed over. Check out a CRT slow motion.

      Everything to do with display technology involves tricking the eye and relying on persistence of vision which is innate.

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