The New Ultra HD Standard & Why It Matters for Qua
Post# of 22465
Posted On: 04/07/2016 8:29:10 AM
The New Ultra HD Standard & Why It Matters for Quantum Dot Suppliers
For manufacturers, the specifications are loose enough to accommodate everyone . For instance, the standard requires 1000 nits at peak brightness (unless the device is capable of very low black level, in which case 540 nits peak brightness is considered sufficient). It is obvious this decision was made to allow OLED TVs to be certified Ultra HD Premium , since high brightness is still an issue for OLEDs.
Quantum dot adoption
For quantum dot suppliers, having more content presented in BT .2020 will provide a great opportunity to demonstrate the benefits of wide color gamut displays. However, devices certified Ultra HD Premium will only have to cover the DCI P3 colour gamut, which is much smaller than BT .2020. So the new standard sets the bar very low when it comes to display performance.
This enables Samsung to go ahead with their new range of quantum dot TVs. Samsung has decided to use cadmium-free quantum dots, which are labelled as safer than cadmium-based materials. Unfortunately, color reproduction with cadmium-free quantum dots is currently lower than 80% of BT .2020 . This is likely to improve in the future as manufacturers learn how to get narrower emission peaks. In the meantime, quantum dots based on cadmium remain the best for displaying BT .2020 content. For example, QD Vision has demonstrated a coverage of 96% BT .2020 using cadmium selenide quantum dots.
http://www.eetimes.com/author.asp?doc_id=1329297
.....Rec.2020 color-gamut coverage ranged from <60% for the white LED set to ~75% for the set with cadmium-free quantum dots to >90% for the set with quantum dots.
http://www.nanosysinc.com/awards/2015/6/3/nan...yweek-2015
....Nanosys information about less than 80% BT 2020 was used for Nanoco article,....why?
Maximizing LCD color performance with quantum dot integration
However, research into the synthesis and mass manufacture of heavy metal-free quantum dots is of growing interest. Cadmium-free quantum dots offer a safer and more sustainable option for manufacturers and consumers, giving them all of the color benefit associated with the technology without the risks associated with toxicity or potential regulatory limitations.
.....that statement seems somewhat misleading, as around 75% is a bit less than 90+%
Nanoco has made considerable advances in narrowing the FWHM and improving the photoluminescence quantum yield of its cadmium-free quantum dots, making them perform nearly identically in a LCD display as their cadmium counterparts .
.......how near is near?, then again near is not all...is it? Was the standard lowered enough to put all on an equal footing?
The film was optimized for Digital Cinema Initiatives P3 (DCI-P3) color space, with the color triangle displaying 95 − 98 % coverage (depending on the filters used) and a white point close to the Commission Internationale de l’Eclairage (CIE) Standard Illuminant D65 after applying color filters.
......again from above article, "the DCI P3 colour gamut, which is much smaller than BT .2020. So the new standard sets the bar very low when it comes to display performance."
http://www.electronicproducts.com/Optoelectro...ation.aspx
Think your way
For manufacturers, the specifications are loose enough to accommodate everyone . For instance, the standard requires 1000 nits at peak brightness (unless the device is capable of very low black level, in which case 540 nits peak brightness is considered sufficient). It is obvious this decision was made to allow OLED TVs to be certified Ultra HD Premium , since high brightness is still an issue for OLEDs.
Quantum dot adoption
For quantum dot suppliers, having more content presented in BT .2020 will provide a great opportunity to demonstrate the benefits of wide color gamut displays. However, devices certified Ultra HD Premium will only have to cover the DCI P3 colour gamut, which is much smaller than BT .2020. So the new standard sets the bar very low when it comes to display performance.
This enables Samsung to go ahead with their new range of quantum dot TVs. Samsung has decided to use cadmium-free quantum dots, which are labelled as safer than cadmium-based materials. Unfortunately, color reproduction with cadmium-free quantum dots is currently lower than 80% of BT .2020 . This is likely to improve in the future as manufacturers learn how to get narrower emission peaks. In the meantime, quantum dots based on cadmium remain the best for displaying BT .2020 content. For example, QD Vision has demonstrated a coverage of 96% BT .2020 using cadmium selenide quantum dots.
http://www.eetimes.com/author.asp?doc_id=1329297
.....Rec.2020 color-gamut coverage ranged from <60% for the white LED set to ~75% for the set with cadmium-free quantum dots to >90% for the set with quantum dots.
http://www.nanosysinc.com/awards/2015/6/3/nan...yweek-2015
....Nanosys information about less than 80% BT 2020 was used for Nanoco article,....why?
Maximizing LCD color performance with quantum dot integration
However, research into the synthesis and mass manufacture of heavy metal-free quantum dots is of growing interest. Cadmium-free quantum dots offer a safer and more sustainable option for manufacturers and consumers, giving them all of the color benefit associated with the technology without the risks associated with toxicity or potential regulatory limitations.
.....that statement seems somewhat misleading, as around 75% is a bit less than 90+%
Nanoco has made considerable advances in narrowing the FWHM and improving the photoluminescence quantum yield of its cadmium-free quantum dots, making them perform nearly identically in a LCD display as their cadmium counterparts .
.......how near is near?, then again near is not all...is it? Was the standard lowered enough to put all on an equal footing?
The film was optimized for Digital Cinema Initiatives P3 (DCI-P3) color space, with the color triangle displaying 95 − 98 % coverage (depending on the filters used) and a white point close to the Commission Internationale de l’Eclairage (CIE) Standard Illuminant D65 after applying color filters.
......again from above article, "the DCI P3 colour gamut, which is much smaller than BT .2020. So the new standard sets the bar very low when it comes to display performance."
http://www.electronicproducts.com/Optoelectro...ation.aspx
Think your way
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