Samsung Electronics Keeps `QD-Display’ Plans A Mystery
Among the biggest head scratchers of CES 2022 has been Samsung Electronics’ silence on plans for its sister company Samsung Display’s previously announced “QD-OLED” hybrid quantum dot/OLED panel technology this year.
Samsung Electronics Vice-Chair J.H. Han didn’t even mention the technology in his Tuesday evening CES 2022 opening keynote address. This was despite the fact that rival Sony Electronics had earlier announced its plans that day to use the long reported “QD-OLED” technology in a very interesting Bravia XR TV series for 2022.
Further, Samsung’s display panel manufacturing arm, Samsung Display, aggressively promoted the technology at the show but under new nomenclature — “QD-Display”, presumably to avoid confusion between it and rival LG’s WOLED panel technology.
Further confusing matters was the fact that Samsung had submitted to the CTA prior to the show a 65-inch “QD-Display” for an Innovation Award, which was prominently featured on the CES 2022 show site.
According to the Innovations Award write-up “Samsung’s 65-inch QD-Display TV is the world’s first true RGB self-emitting Quantum Dot OLED display—revolutionizing TV by combining the contrast levels of RGB OLED with the color and brightness of quantum dots for ultimate visuals. The QD-Display TV combines a groundbreaking new QD-OLED display with Samsung’s gorgeous Infinity One Design and immersive Object Tracking Sound technology.”
We asked our contacts with Samsung Electronics America about plans for this set and were told: “We will be providing more details about our 2022 lineup in the next several weeks.”
Nevertheless, Samsung Display (SD) is aggressively promoting the benefits of this new technology approach. According to material supplied to us by SD, QD-Displays are being produced in screen sizes of 65- and 55-inches for 4K TVs and 34-inches for QHD-resolution monitors at this time.
There was no mention of the possibilities for 8K panel versions, which was one of the early criticisms of the technology. Displays with 8K resolution are obviously a big part of Samsung’s current and future product roadmap.
QD-Display is based on Red and Green Quantum Dot converters printed on each pixel and a Blue self-emitting (OLED) light source layer with an Oxide TFT backplane. “This 3-layer panel structure affords a slim design,” the company said. “Unlike WOLED (White OLED) or LCD displays that rely on color filters to tune the image, QD-Display’s color conversion allows for a far superior color performance.”
For color reproduction, SD said QD-Display technology has 90% coverage of the BT.2020 color space, and 99% of DCI-P3. This is because “QD-Display’s full width at half maximum (FWHM) is 20 to 40 nanometers (nm) wide, which is 10 to 20 nano-meters narrower than that of other self-emitting displays. The QD-Display’s slim spectral cones help to achieve an exceptional degree of color purity. Thus, each primary color will render its own color in a QD-Display with remarkable clarity and also allow for more accurate combinations.”
SD also said “QD-Display enables a wider viewing angle than WOLEDs or IPS LCDs using a dome-shaped flux structure and a top-layer emission display. More than 80% of the luminance in QD-Displays is maintained at 60 degrees off-axis, and color shift remains well below 0.01 of Δu’v’.”
The company also uses a technology that significantly reduces the amount of on-screen glare (reflections) that can distract from the picture. This is a big benefit of some of Samsung’s premium NEO QLED TVs.
The technology produces greater color volume, SD said, with QD-Display able to show extremely vivid color across the entire luminance range. Peak panel brightness was said to exceed 1000 nits measured using at 10% white window pattern.
Motion handling also will be better than either WOLED or LCD TVs, SD said. QD-Display “provides an almost instantaneous native (G to G) response time of 0.1Ms. Modern displays are sample-and-hold devices (e.g., an image is rendered and held for the frame time of 16.7ms for a 60Hz refresh). All is well if the image is still, but once the image moves, the eye wants to pursue the motion smoothly. For LCD displays, the response slope is very slow. Because of its faster response time, QD-Display’s transition edge is closest to the ideal scenario. With this steeper transition edge, the QD-Display is able to re-create motion with significantly less blur.”
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By Greg Tarr
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