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News Researchers claim major LCD breakthrough

Discussion in 'Article Discussion' started by bit-tech, 4 Jul 2018.

  1. bit-tech

    bit-tech Supreme Overlord Staff Administrator

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    Read more
     
  2. l3v1ck

    l3v1ck really joined on Dec 24th 2004.

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    So will that solve the contrast issue with current LED backlit (non OLED) screens?
     
  3. Gareth Halfacree

    Gareth Halfacree WIIGII! Staff Administrator Super Moderator Moderator

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    They claim a wider colour gamut, so it'll certainly improve things - but you'll still have the problem of a backlight shared by the whole display (or, for the clever zoned versions these days, large chunks of it.) Per-pixel lighting OLED-style is still your only choice for truly sharp contrast - well, that or going back to good ol' CRT, anyway.

    EDIT: Though, I guess in theory, if you're no longer blocking 70% of the light with colour filters you could add a coating to the screen that blocks more of the backlight - and that might make your blacks blacker while still giving you decently bright colour, which would otherwise be the problem with that approach.
     
  4. ChaosDefinesOrder

    ChaosDefinesOrder Vapourmodder

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    Sounds a bit like a "solid state" DLP crossed with LCD...
     
  5. edzieba

    edzieba Virtual Realist

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    AIUI this requires backlights to exclusively use fully independent R, G and B emission elements. This was a backlight solution abandoned at least a decade ago due to cost, size, and power consumption, in favour of white emission LEDs (and more recently, monochrome LEDs combined with Quantum Dots to provide the rest of the spectrum from stimulated emission). Switching back to RGB backlights with QD assistance (to achieve the gamut now demanded) would mean needing a backlight array (or backlight entry to the distribution film) that keeps the individual LEDs optically independent (to prevent them stimulating emission from the QDs of the other channels due to backscatter) and adding filters to remove the driving wavelength for the channels that do not require it (driving wavelength is usually blue to its higher energy. It;s easer to stimulate green or red - lower energy - emission with blue than vice versa).

    Colour-sequential displays are completely unsuitable for VR, due to temporal chromatic fringing. On top of that, FLCD cells do not have variable transmissivity like TN LCD cells do, they are either off or on. That means brightness modulation is only via PWM rather than direct emission control, causing further issues for VR (which needs low persistence driving rather than being able to average output over a whole frame).

    FLCD is the technology used in LCoS panels. The new development here is not the display technology itself, but being able to fabricate larger panels economically.
     
    Last edited: 4 Jul 2018
  6. Chicken76

    Chicken76 Member

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    Isn't there an extra 'd' in there?
     
  7. Gareth Halfacree

    Gareth Halfacree WIIGII! Staff Administrator Super Moderator Moderator

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    There is indeed - fixed, ta!
     
  8. David

    David RIP Tel

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    ten times the price :lol:
     
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