World’s smallest LEDs from a new semiconductor
www.zju.edu.cn
World’s smallest LEDs from a new semiconductor Micro- and nano-perovskite LEDs promise a new generation of display technology 19 March 2025, Zhejiang University ‘Downscaling’, the process of making elementary devices smaller in size, is at the heart of many technological breakthroughs in computing, information display, and human-machine interactions. For example, the downscaling of transistors has accelerated the speed of computers
  • Buffalox@lemmy.worldEnglish
    29·
    3 months ago

    What is the use case for 127000 PPI?
    AFAIK retina start about 450 for phones, that are already pretty close view.
    The closest id probably VR that can utilize 1000+. (AFAIK 2000 is REALLY good!)
    But that leaves more than a factor 60 that I can’t see much of a use case for?
    VR can maybe use 5000, I seriously doubt it will make any difference above that.

    So where is more than 5000 necessary?

    • Echo Dot@feddit.ukEnglish
      15·
      2 months ago

      I’m thinking lithography. The higher the DPI the smaller you can make your components.

      • Buffalox@lemmy.worldEnglish
        1·
        2 months ago

        Maybe for low end lithography, you can’t use normal light for anything high end, already at 7nm it requires EXTREME ultra violet. And the lamps for that cost 100s of millions, to make the shortwave light necessary.

        But for low end, it could possibly be used for ultra fast and cheap cycle between tape-out and production?

    • plz1@lemmy.worldEnglish
      9·
      2 months ago

      Non-human use cases, would be one. Like, having the ability for machines to “see” highly detailed imagery via camera. Just spitballing. My eyes are shit, so a screen that cool will never be of use.

      • Buffalox@lemmy.worldEnglish
        1·
        2 months ago

        Maybe, but it would be more logical to simply bypass screen to eye camera, to just transmit the signal from the original camera directly.
        But hypothetically yes, that could possible be a use in a future scenario.

      • Buffalox@lemmy.worldEnglish
        31·
        2 months ago

        You can’t make lenses to focus properly at shorter distances I think, or you would get an extremely narrow FOV.

      • Buffalox@lemmy.worldEnglish
        4·
        2 months ago

        That’s it! An ultra fine web of microscopic lights simulating the Christmas tree shrouded in fog.
        They have to hurry up and make that, I want to see what that looks like.

        What a cool idea. 👍

      • Buffalox@lemmy.worldEnglish
        6·
        3 months ago

        I think 8K can be made with 2k ppi.
        That would be 4 inches or about 10cm wide screen.

        • BakedCatboy@lemmy.mlEnglish
          2·
          2 months ago

          The bigscreen beyond used 1 inch displays so this could be useful for getting much higher resolutions in a smaller form factor. I don’t think my Index displays are even as big as 4 inches so I guess that explains why all the super high res headsets are so huge.

          Edit: my index screens are under 3", just did a lens swap so I have the old eye tubes handy

          • Buffalox@lemmy.worldEnglish
            1·
            2 months ago

            There are many considerations like FOV would be better with a bigger screen, I think 4" would probably be the max, but still that’s only at 2k ppi, there’¨s a looong way to 127K. Even with a 4k ppi screen you can do 8k view with just 2".