Shih-Jung Ho | HsinLight: How does a 15-micrometer pixel size micro-QLED achieve over 218,000 nits of brightness for AR/VR and transparent HUDs?
00:11:51.900 - 00:12:45.800
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How does a 15-micrometer pixel size micro-QLED achieve over 218,000 nits of brightness for AR/VR and transparent HUDs?
Scaling electroluminescent QLED technology to micro-display dimensions is critical for the next wave of augmented reality (AR) and virtual reality (VR) headsets. By integrating their advanced MSDR printing solution with high-resolution active-matrix backplanes, HsinLight has demonstrated micro-QLED pixel pitches scaled down to 15 micrometers, bypassing the sub-pixelization bottlenecks that have historically plagued organic and quantum dot emitters at high PPI.
Furthermore, this technology has been applied to fabricate highly transparent QLED panels. By optimizing the transparent conductive oxide (TCO) electrodes and maintaining highly uniform emitting layers via their specialized printing process, they have achieved high optical transmittance coupled with a peak luminance exceeding 218,000 nits.
This combination of high optical transparency and ultra-high brightness is a critical breakthrough for head-up displays (HUDs) in automotive windshields and near-eye AR optics. Achieving this level of thermal tolerance and efficiency from printed quantum dot emitters marks a key milestone for solid-state display architectures.
In this short video, you can learn:
* Scaling printed electroluminescent quantum dot pixels down to a 15-micrometer pitch for high-PPI micro-displays.
* Achieving an ultra-high peak luminance of over 218,000 nits from transparent printed QLED structures.
* Enabling new optical pathways for head-up displays (HUD) and near-eye waveguide AR architectures.
๐ **Clip Abstract** This segment showcases HsinLight's progress in scaling micro-QLEDs to a 15-micrometer pixel size for advanced AR/VR hardware. Additionally, they demonstrate transparent QLED devices achieving over 218,000 nits, tailored for automotive HUDs.
#MicroQLED, #MSDRPrinting, #TransparentQLED, #ElectroluminescentQD, #WaveguideAR, #AutomotiveHUD
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00:01:06.600 - 00:01:59.600
Can targeted crystal facet encapsulation finally solve the environmental degradation of Quantum Dots in high-flux LED packages?
How can quantum dot developers overcome the critical vulnerability of surface degradation under extreme optoelectronic operating conditions?
The commercialization of quantum dot (QD) technologies in high-density optoelectronic architectures is frequently bottlenecked by rapid material degradation. Standard rod-like quantum dot morphologies exhibit highly vulnerable crystal facets, specifically at the 2D or [111] crystal phases, which act as primary sites for chemical attack. When exposed to ambient oxygen and moisture, these unpassivated surface states undergo accelerated oxidation, severely compromising the material's photoluminescence quantum yield.
To resolve this fundamental material instability, advanced surface engineering has introduced a novel "shield-like" quantum dot architecture. By selectively engineering a protective nanoscale shield over these highly sensitive crystal phases, developers can effectively block the diffusion pathways of moisture and oxygen. This targeted passivation strategy dramatically enhances the intrinsic chemical stability of the raw QD materials without degrading their core optoelectronic properties.
This robust shielding technology is particularly vital for demanding QD-on-chip LED platforms, where materials must endure harsh operational environments. Under simultaneous high-temperature and high-lux stress, conventional QDs suffer from rapid thermal and photo-induced quenching. The engineered shield-like morphology ensures exceptional reliability and operational lifetimes under these extreme light-fastness testing conditions, paving the way for direct-on-chip integration.
In this short video, you can learn:
* The specific crystallographic vulnerabilities of conventional rod-like quantum dots that accelerate degradation.
* How targeted nanoscale shielding of sensitive crystal phases prevents moisture and oxygen ingress.
* The performance advantages of shield-like quantum dots under high-temperature and high-light-fastness LED operating conditions.
๐ **Clip Abstract** This video clip discusses the vulnerability of conventional rod-like quantum dots to oxygen and moisture attacks at their sensitive 2D or 111 crystal phases. The speaker explains how their patented shield-like quantum dot technology passivates these phases to improve raw material stability and reliability in high-temperature, high-light-fast QD-on-chip LED applications.
๐ค Speaker: Shih-Jung Ho
๐ข Company: HsinLight
๐
Event: Mini- & Micro-LED Displays 2022: Markets, Manufacturing Innovations, Applications, Promising Start-ups
๐ Location: TechBlick Platform |Online
๐ Learn more at the next TechBlick event: https://www.techblick.com
#CrystalFacetPassivation, #QuantumDotEncapsulation, #OnChipIntegration, #HighFluxLEDs, #MicroLEDDisplays, #ColorConversion
00:08:32.500 - 00:10:17.100
How can display manufacturers eliminate the coffee-ring defect in inkjet-printed electroluminescent QLEDs without relying on carcinogenic solvents?
How can display manufacturers eliminate the coffee-ring defect in inkjet-printed electroluminescent QLEDs without relying on carcinogenic solvents?
The transition of electroluminescent Quantum Dot Light Emitting Diodes (EL-QLED) from lab-scale spin coating to mass-production inkjet printing introduces severe thin-film morphology challenges. Traditional spin coating yields atomically smooth, uniform layers, but inkjet droplets suffer from the "coffee-ring effect," where outward solvent evaporation forces quantum dot particles to pile up at the droplet edges, resulting in non-uniform films and poor electroluminescent efficiency.
To resolve this, HsinLight introduced their patented Mixed Solvent (MS) ink formulation combined with specialized design rules (MSDR). This solution leverages a combination of co-solvents with varying boiling points and surface tensions to induce a strong, inward Marangoni flow, effectively counteracting the outward capillary flow during droplet drying.
A key challenge in implementing Marangoni-driven drying is that typical high-surface-tension solvents used for oil-based QD dispersions are highly carcinogenic. HsinLightโs formulation overcomes this by using environmentally friendly, non-carcinogenic solvent systems that still achieve optimal viscosity and surface tension gradients, yielding printed films with uniformity rivaling spin-coated controls and achieving up to 120% of benchmark EQE.
In this short video, you can learn:
* Controlling Marangoni flow using mixed-solvent formulations to eliminate the coffee-ring defect during droplet drying.
* Formulating eco-friendly, non-carcinogenic quantum dot inks that maintain critical viscosity and surface tension parameters.
* Scaling inkjet-printed EL-QLED film uniformities to match the electrical and optical performance of spin-coated benchmarks.
๐ **Clip Abstract** The speaker outlines how HsinLight's MSDR printing technique leverages Marangoni flow to eliminate drying defects in inkjet-printed QLEDs. This eco-friendly, mixed-solvent formulation matches the film uniformity and efficiency of spin-coated devices, enabling industrial-scale production.
#MarangoniFlow, #CoffeeRingEffect, #ElectroluminescentQLED, #GreenSolventInks, #PrintedElectronics, #QuantumDotDisplays