News on China's scientific and technological development.

vesicles · Apr 2, 2017

taxiya said:
The first (prototype) in a new display tech from BOE. It is very recent news, so most googling results are in Chinese, here is the Xinhua report.

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The only google return in English.

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While LCD display using some sort of QD tech is sold on the market such as Samsung or TCL QD TVs for example, the BOE prototype is a true Quantum Dot LED in that it is electrical excited/modulated QD emitting light rather than the existing applications using QD films as backlight filters. The current commercial products are essentially LCD displays with LED backlight sandwiched with QD filters. AMQLED is more closer in principle as AMOLED except non-organic which means longer life and less chance of burn-out.

This is another chance to leapfrog/bypass existing technology monopolies by well established competitors.

KIENCHIN said:
I am about to replace my Hisense 65 inch 4K TV bought about 3 years ago, I will wait for this technology to come to market.

taxiya said:
hehe, I think you should not hold your breath for it in the coming 5 years. The prototype is only 5 inches now. It will take some years for it to grow to 65 inches with a compatible price as AMOLED. BTW, 3 year old TV is still new compared with my 10 year old projector.

Here is supposedly the prototype.

The most likely next gen big TV/monitor will be OLED. Apple's next iPhone 8 will be using the OLED display. My guess is that we will see OLED TV monitors coming out in the next couple years.

taxiya · Apr 2, 2017

vesicles said:
The most likely next gen big TV/monitor will be OLED. Apple's next iPhone 8 will be using the OLED display. My guess is that we will see OLED TV monitors coming out in the next couple years.

I agree. My guess is that AMOLED vs. LCD is like LCD TV vs. Plasma/CRT 10 years ago. After at least 5 years from now, something new like AMQLED will become today's AMOLED.

taxiya · Apr 2, 2017

Quickie said:
It is likely quite easily scaled to a larger size. So maybe it'll be available commercially way before 5 years time?

One question is how it'll improve the picture quality over current LED display technology.

Around 5 years is also my rough guess, but I tend to think of a little longer than 5.

Currently only OLED is true LED, the other so called LED TVs are actually LCD with LED backlight.

AMQLED is at least as good as OLED in terms of color space, and is theoretically batter. OLED has the problem of burn-out, that is one color LED fade its strength faster than others, causing the color shift. The reason is the organic material. OLED is improving in combating this problem, but fundamentally it can never overcome it, only delay it to the point that the TV is old enough to be dumped. QLED uses quantum dots which is non-organic, they emit different light because of their different particle size which never change. So it is kind of guaranteed that color is always perfect in their lifespan.

Another advantage is that QLED emits very narrow wave band light, that means very pure and accurate color, once again because of particle size is fixed to Nano-meter level. OLED can not match that pureness, its single color still covers a relatively broad band width.

SamuraiBlue · Apr 2, 2017

taxiya said:
Around 5 years is also my rough guess, but I tend to think of a little longer than 5.

Currently only OLED is true LED, the other so called LED TVs are actually LCD with LED backlight.

AMQLED is at least as good as OLED in terms of color space, and is theoretically batter. OLED has the problem of burn-out, that is one color LED fade its strength faster than others, causing the color shift. The reason is the organic material. OLED is improving in combating this problem, but fundamentally it can never overcome it, only delay it to the point that the TV is old enough to be dumped. QLED uses quantum dots which is non-organic, they emit different light because of their different particle size which never change. So it is kind of guaranteed that color is always perfect in their lifespan.

Another advantage is that QLED emits very narrow wave band light, that means very pure and accurate color, once again because of particle size is fixed to Nano-meter level. OLED can not match that pureness, its single color still covers a relatively broad band width.

Hasn't Samsung already placed QLED monitors on the market?
As for OLED TVs(40 inch and/or larger), they been in the market for the last 5 years or so.

Quickie · Apr 3, 2017

taxiya said:
Around 5 years is also my rough guess, but I tend to think of a little longer than 5.

Currently only OLED is true LED, the other so called LED TVs are actually LCD with LED backlight.

AMQLED is at least as good as OLED in terms of color space, and is theoretically batter. OLED has the problem of burn-out, that is one color LED fade its strength faster than others, causing the color shift. The reason is the organic material. OLED is improving in combating this problem, but fundamentally it can never overcome it, only delay it to the point that the TV is old enough to be dumped. QLED uses quantum dots which is non-organic, they emit different light because of their different particle size which never change. So it is kind of guaranteed that color is always perfect in their lifespan.

Another advantage is that QLED emits very narrow wave band light, that means very pure and accurate color, once again because of particle size is fixed to Nano-meter level. OLED can not match that pureness, its single color still covers a relatively broad band width.

I would guess that it would be available commercially in 3 to 4 years time but at expensive prices.

taxiya said:
Another advantage is that QLED emits very narrow wave band light, that means very pure and accurate color, once again because of particle size is fixed to Nano-meter level. OLED can not match that pureness, its single color still covers a relatively broad band width.

Interesting bit of information. That would mean improvement towards the picture quality in its closeness to real natural colors.

broadsword · Apr 3, 2017

I'd rather wait for this rather than get a Samsung. Lotta pyrophobia

vesicles · Apr 3, 2017

SamuraiBlue said:
Hasn't Samsung already placed QLED monitors on the market?
As for OLED TVs(40 inch and/or larger), they been in the market for the last 5 years or so.

I think Samsung came up a 40 inch OLED TV several years back. Then bigger ones started to show up last year or so. Smaller ones are not worth the money and bigger ones are still too expensive. I think only LG has bigger ones >50 inch and they cost $3000-5000 (at least this is the case in the States).

My personal belief is that higher resolution only matters when your TV is bigger than 50 inch. When you have a 40 inch TV and sit about 8-10 ft away, you can't tell 4K from 2k, or even a 1080i. Our eyes simply don't have the capability to capture the differences on such small monitor from so far away.

Only when you have a 65 inch and sit about 8-10 ft away, you can appreciate the differences in color and resolution, etc.

Note that I'm talking about TVs, not computer monitors. Since you sit very close to a computer monitor, even small ones matter in this case. The size of the monitor AND sitting distance together determine visual quality.

Also, another of my personal belief is that having a smaller TV totally defeats the purpose of having a high resolution TV. You want an HDTV to overwhelm and to wow your senses. Sitting in front of a tiny 40 inch is simply underwhelming... in that case, why spending so much money to get an underwhelming effect? We do have a 42-inch in our bedroom. It's a simple LCD TV that we picked up on a Black Friday for $200. The one in our living room, on the other hand, is a totally awesome system designed to overwhelm anyone who sees it...

SamuraiBlue · Apr 3, 2017

vesicles said:
I think Samsung came up a 40 inch OLED TV several years back. Then bigger ones started to show up last year or so. Smaller ones are not worth the money and bigger ones are still too expensive. I think only LG has bigger ones >50 inch and they cost $3000-5000 (at least this is the case in the States).

My personal belief is that higher resolution only matters when your TV is bigger than 50 inch. When you have a 40 inch TV and sit about 8-10 ft away, you can't tell 4K from 2k, or even a 1080i. Our eyes simply don't have the capability to capture the differences on such small monitor from so far away.

Only when you have a 65 inch and sit about 8-10 ft away, you can appreciate the differences in color and resolution, etc.

Note that I'm talking about TVs, not computer monitors. Since you sit very close to a computer monitor, even small ones matter in this case. The size of the monitor AND sitting distance together determine visual quality.

Also, another of my personal belief is that having a smaller TV totally defeats the purpose of having a high resolution TV. You want an HDTV to overwhelm and to wow your senses. Sitting in front of a tiny 40 inch is simply underwhelming... in that case, why spending so much money to get an underwhelming effect? We do have a 42-inch in our bedroom. It's a simple LCD TV that we picked up on a Black Friday for $200. The one in our living room, on the other hand, is a totally awesome system designed to overwhelm anyone who sees it...

I believe both Samsung and LG had marketed 55inch OLED tvs from 2013, although there were far from becoming popular due to it's overwhelming price tag back then.
Sony was the first to market a OLED tv although only a 19 inch display(or smaller) back in 2007.
As for Quantum dot display I was right Samsung and Sony has already placed them in the market while TCL, HISENSE, CHANGHON, and Sharp doing research.LG may launch theirs this year.

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According to this article Sony is already moving beyond Quantum dots to create the next generation LED back light system that will not add cost like QD with the same color fidelity.

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(Only in Japanese)

taxiya · Apr 3, 2017

SamuraiBlue said:
Hasn't Samsung already placed QLED monitors on the market?
As for OLED TVs(40 inch and/or larger), they been in the market for the last 5 years or so.

Samsung's offer is in fact QDLED (Quantum Dot LED), not QLED (Quantum dot LED). These two terms are differentiated by the authors.

Here are two detailed reviews about current application of Quantum Dots TV.

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and

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Here is the key of Samsung's QDLED

QLED is a variation of LED LCD, adding a quantum dot film to the LCD "sandwich."

It use LED backlight, QD film (filter) and LCD to modulate the light. The QD film (in one application) is to transfer blue LED light to green and red. It is a light to light conversion, photoluminescence. QD film does not emit light by itself.

On the other hand, a true QLED has no backlight, the QD is electroluminescence, QD emits electronically modulated light directly to create image, in the very same principle as OLED.

In a similar way, Samsung is doing a commercial trick (a lie to be harsh) as every TV makers did with LED TV (not OLED). The so called LED TV was really LCD TV with LED backlight, LED there is just a lamp.

As for OLED, it has been here for some time, but the price is at lease double of the best LCD (LED backlight and local lighting) without double the performance, although clearly better. For OLED to be really the dominant buy, its price has to drop to something (just saying) like 120% of LCD to replace it. An analogue is that OLED is like Electrical cars today.

taxiya · Apr 3, 2017

SamuraiBlue said:
I believe both Samsung and LG had marketed 55inch OLED tvs from 2013, although there were far from becoming popular due to it's overwhelming price tag back then.
Sony was the first to market a OLED tv although only a 19 inch display(or smaller) back in 2007.
As for Quantum dot display I was right Samsung and Sony has already placed them in the market while TCL, HISENSE, CHANGHON, and Sharp doing research.LG may launch theirs this year.

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According to this article Sony is already moving beyond Quantum dots to create the next generation LED back light system that will not add cost like QD with the same color fidelity.

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(Only in Japanese)

I appreciate that if you can translate (summary) of the second link. Here is what I am specially interested

青色LED+マゼンタ蛍光体素材+緑蛍光体素材

My understanding is that "Blue LED + Magenta Phosphor + Green Phosphor". It looks like the same principle as Quantum Dots application as Samsung, instead of QD (one size for green and another size for red), Sony choose phosphor.

I don't know the pro and con of phosphor vs. QD though.

Edit:
The picture in the 2nd link is in English, it actually says the same as my understanding.

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