The Next Chapter for Quantum Dot Displays

Abstract

FOR MORE THAN A DECADE, QUANTUM DOTS (QDS) HAVE BEEN steadily reshaping the display landscape—first as photoluminescent (PL) films that dramatically improved color and efficiency in LCD backlights and more recently as color-conversion layers in QD-OLED TVs and monitors. But the technology has always pointed toward a more ambitious destination: a fully self-emissive QD display, where each subpixel generates its own light through the direct electrical excitation of QDs. That destination is now coming into sharper focus. In this issue of Information Display, we present two articles that highlight the rapid progress being made on the road to electroluminescent QD displays and the evolving measurement science needed to properly characterize the increasingly complex displays that QD technology enables.

Myoungjin Park and colleagues at Samsung Display review the status of inkjet-printed QD-LED displays and make a strong case that commercialization is within reach. QD-LEDs move beyond today's PL approaches entirely. Rather than converting light from a blue LED or blue OLED source, each red, green, and blue subpixel emits light directly under electrical drive, combining the deep blacks, wide viewing angle, and fast response of emissive technologies with the intrinsically narrow emission spectra and wide color gamut that QDs are known for.

The progress they report is striking. Red and green cadmium-free QD-LEDs have reached external quantum efficiencies and lifetimes that rival commercial phosphorescent OLEDs, and Samsung Display prototypes showcased at Display Week 2025 achieved 400 nits at 264 pixels per inch.

The authors present inkjet printing as a particularly compelling manufacturing path, offering additive, mask-free patterning with greater than 90 percent material utilization and compatibility with large-format substrates. This represents a meaningful cost advantage over the vacuum deposition processes used for OLEDs today. The remaining gap is blue device lifetime, but recent advances in oxidation suppression and exciton management are closing it steadily. If QD-LED technology delivers on its current trajectory, it could offer the display industry something rare: a platform that is simultaneously better in color, competitive in efficiency, and potentially lower in manufacturing cost.

The second article, by Mark Rejhon and Ian Khaw, explores the intersection of high-speed temporal measurement and modern display technologies, including QD-enhanced displays. This work grew out of a convention demonstration that earned consecutive People's Choice Awards at Display Week 2024 and 2025 for its real-time visualization of color-channel performance differences between phosphor types. Building on that work, the team expanded their investigation to examine how temporal display behavior interacts with color measurement methodology across miniLED and other modern displays. Their high-speed photodiode oscilloscope measurements reveal fascinating details about the complex interplay between LED pulse width modulation, brightness stair-stepping algorithms, phosphor response characteristics, and LCD pixel transitions.

Among the most compelling findings in this article is a clear demonstration of how QD phosphors deliver significantly faster and more uniform color-channel response than conventional KSF phosphors under strobed backlight conditions, with direct implications for motion performance and color ghosting artifacts. The article also surfaces valuable insights for the metrology community, documenting how dynamic backlight algorithms in modern miniLED displays can introduce unexpected variances between sequential measurement passes and recommending simultaneous multichannel measurement as a best practice going forward.

These two articles complement each other well. Park and colleagues show us where QD display technology is heading: toward fully emissive panels manufactured at scale through inkjet printing. Rejhon and Khaw demonstrate the measurement precision needed to properly characterize the complex QD-enabled displays already on the market.

As QD-LEDs advance from prototypes toward commercial products and display driving schemes grow more sophisticated, the interplay between materials innovation and measurement science will only become more important. We hope these articles spark both excitement about the technology and productive discussions about how best to evaluate it across the display community.