Re: Quantum Dot Tech - cheap wide gamut but is it ready for mainstream?
Re: Quantum Dot Tech - cheap wide gamut but is it ready for mainstream?
- Subject: Re: Quantum Dot Tech - cheap wide gamut but is it ready for mainstream?
- From: Charles D Tobie <email@hidden>
- Date: Fri, 25 Mar 2016 21:12:44 -0400
As usual, the degree of Edmund’s sarcasm is so great, that its difficult to determine what he is actually saying. My usual strategy is to ignore his posts entirely. However, having been foolish enough to post to this list once, I’ll make a single pass at replying…
> On Mar 25, 2016, at 5:26 PM, edmund ronald <email@hidden> wrote:
>
> As usual I have to agree with David.
Who knows? Like Doctor Who, you’re actual meaning is usually lost...
> - No process ever improves; so Apple has passed o OLED and on quantum dot - they have their reasons, and that's it.
Apple uses OLED in the Apple Watch. Apple passed on Quantum Dots for larger screens, due to ecological issues. I may disagree with various Apple strategies, but I feel that they are better endowed to determine what technologies are green, and what ones are not, than I am. So their avoiding Quantum Dots is not a good indicator.
> -Uniformity clearly must be an issue with a screen that has no backlight. This also applies to OLED.
Uniformity has proven to be the downfall of many great technologies. And its still important today. So, I add it to my list of unknowns, that I hope members of this list may have meaningful information on. Perhaps someone will actually use their fancy spectrophotometer to measure one of these screens at multiple locations, and post the results.
> - Photographers need high resolution, especially on large screen like a 27". And see point 1 above, resolution improvements are slow and painful.
Photographers desire pixel-level resolution, not just for tasks that require it, like sharpening, and dust busting, but for everything else, if possible. I would not waste deskspace on a display that did not have “retina” grade resolutions any longer, and I assume most other photographers feel similarly. My ancient 30” Cinema Display was 2,560 x 1,600, and seemed uselessly low-res for the last couple of years that I used it.
> - How can one expect to disable a feature like Smart Contrast? Not feasible, things are always wired forever.
Many auto-contrast functions in expensive TVs were hardwired in a way that made calibration impossible. So its an issue worth flagging.
> - Last not least spectros are not appropriate for screen calibration, and much too expensive as we all know. Look at the $10K or so Minolta spectro-radiometers.
There used to be this concept of display price to calibrator price ratio. With a display for two hundred and some odd dollars, that ratio is likely to be reversed. X-Rite has made moves to bring spectros back to a starting point over a thousand dollars. So its a legitimate question to ask whether the purchaser of this type of low cost display will use a calibrator at all.
>
> David is right: Until Philips or their IEMs bring out bespoke colorimeters with primaries wired in for the quantum transitions involved, this technology must be considered unusable, eeven at a pricepoint of $270 list for 27".
There are other options than a four or five digit priced spectro, and a “bespoke colorimeter”. For instance, the existing lines of general use colorimeters may provide library entries with corrections for Quantum Dot screens. Or built-in calibrators may serve the need; though those have not made it to this price range yet. With spectro-measured factory primaries, the remaining tasks are largely luminance related.
So, I refine my list: It will be interesting to see what these displays offer for canned corrections (a display this wide-gamut must have a reasonable canned profile, or colors will be objectionable), it will be interesting to see what uses these displays are sufficient for (at this rez, photo and video really aren't on the list).
C. David Tobie
Senior Project Manager
Workflow & Color
Durst Phototechnik AG
Julius-Durst-Strasse 4
39042 Brixen, Italy
Telefon +39 04 72 81 01 11
Telefax +39 04 72 81 01 32
VAT Nr.: 00848170213
www.durst-online.com <http://www.durst-online.com/>
email@hidden <mailto:email@hidden>
skype: CDTobie
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