110 Inch Home Market MicroLED Display revealed by Samsung

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AddictFPS
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by AddictFPS » 09 Jan 2021, 14:03

https://www.techhive.com/article/342963 ... ology.html

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Seeing this zoomed pixel of Sony MicroLED (Cristal LED, CLED), the microled 3 subpixels not fill all pixel reserved area, only a very small part. The pixel reserved area is square, but pixel is vertical rectagle. I wonder, why so small ? This make very difficult fit 4K in 55" TV or FHD in 27" monitor, and thus, very difficult compete with Samsung. Maybe a MicroLED patent of other manufacturer not allow Sony use the same structure.

I also wonder how this pixel structure would affect color uniformity. True black uniformity not problem. High brighness uniformity maybe also no issues, brightness maybe is so high to mix contiguous pixels, so perfect for HDR, but... light colors with low/moderated brightness ? Lets take full screen light blue, in this case more than 90% of screen is black, less 10% blue, how eye see this ? uniform or grainy ? For monitor distances i have serious doubts.

This structure seems than would minimize Color Bleeding (linearity, pixel row and column deviations) compared with LCD.

Imagine how crazy resolution would be, if Sony fill all pixel reserved space with these diminute microleds pixels !

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Chief Blur Buster
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by Chief Blur Buster » 09 Jan 2021, 17:23

Exact numbers:

4K with all subpixels = 24,883,200 LEDs, rounded to ~25M
8K with all subpixels = 99,532,800 LEDs, rounded to ~100M

But yes, lots of black fill. Will make for great blacks, avoiding the nonblack colors of the LED chips themselves (depending on type of LED, the phosphor of direct LEDs can be highly reflective/fluorescent looking).

Black fill is usually is not an issue when pixels are at practically retina densities, and near-retina densities at typical view distance is ideally needed to avoid screendoor effect amplification from the increased black fill ratio. Such RGB point sampling does make ClearType style rendering impractical but improves color mixing significantly. For computer text, normal antialiasing needs to be used. Yes, much reduced color bleeding, yes.

That said, you’ll need to rely somewhat on oversampling approx 2x to overcome nyquist factors of pixellation and grainy factors. i.e. To see a uniformly solid color with this large ~98% black fill, will require very high pixel densities for the targetted view distance.
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thatoneguy
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by thatoneguy » 10 Jan 2021, 10:57

Chief Blur Buster wrote:
09 Jan 2021, 17:23
But yes, lots of black fill. Will make for great blacks, avoiding the nonblack colors of the LED chips themselves (depending on type of LED, the phosphor of direct LEDs can be highly reflective/fluorescent looking).
That's where Perovskite LEDs come in I guess.

jasswolf
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by jasswolf » 14 Jan 2021, 02:05

Chief Blur Buster wrote:
07 Jan 2021, 14:34
Miniaturizing MicroLED is very tough to do when you've got ~100 million discrete LEDs in an 8K display, or ~25M discrete LEDs in a 4K display. I'm counting all subpixels, at 3 LEDs per pixel (R,G,B).

MicroLED is like your indicator LED or the elements of a LED alarm clock. But cramming many millions of them into the same display!

It is possible defect rates were too high at the 75 inch size;
8X and 7X were mentioned in the presentation material, so it's possible there's a 77" size to go with the 88", but both are supposedly end of 2021 releases.

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AddictFPS
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by AddictFPS » 14 Jan 2021, 12:10

https://www.cnet.com/news/microled-coul ... -line-try/

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This is a magnified Samsung MicroLED. At left White LEDs used for LCD backlight, right the RGB MicroLEDs, than are placed much more together than those of Sony.

Article also add than in 75" 4K TV showed in CES 2020, each MicroLED subpixel has 0.15mm size, but is rectangular shape, and not especify if is the short or the long side. Nor size of black space betwhen pixels, than is longer horizontaly.

For reference, 0.15mm is the full pixel size of 27" 4K LCD monitor. Is needed 65% smaller MicroLED subpixel to fit 4K inside 27" monitor, with the same in-betwhen space of LCD. But only 25% reduction to allow fit FHD inside 27" and only a bit more for 25", the current eSports standar.

If Samsung want, one prototype of 27" FHD high refresh gaming monitor, with "Black Frame Insertion" to reduce motion blur, would't take to much to arrive, at the same time of 55" TV.

thatoneguy
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by thatoneguy » 14 Jan 2021, 15:36

Where does it say the pixels are rectangular?
Also, that's an article from a year ago.

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AddictFPS
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Re: 110 Inch Home Market MicroLED Display revealed by Samsung

Post by AddictFPS » 16 Jan 2021, 11:35

Pixel area is square, but not all is filled with leds. Zoomed picture show subpixel horizontaly rectangular, and the three subpixels array verticaly retangular. Black space betwhen pixels is longer horizontaly than verticaly to compensate it.

Is not a issue, BlurBusters LCD is allmost the same, but turned 90º degrees.

https://www.rtings.com/monitor/reviews/ ... lite-xg270

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