Mini-LED, Micro-LED and OLED displays: present status and future perspectives

Huang, Yuge; Hsiang, En‐Lin; Deng, Ming-Yang; Wu, Shin‐Tson

doi:10.1038/s41377-020-0341-9

Cited by 824 publications

(505 citation statements)

References 108 publications

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“…The second issue is how to realize full color and high resolution simultaneously, as mass transfer and assembly for such tiny RGB LEDs is challenging ( Lin and Jiang, 2020 ; Wong et al., 2020 ). A parallel approach is to use blue μLED to pump green and red quantum dots as color conversion ( Huang et al., 2020 ). However, obtaining a uniform, long lifetime color conversion layer without color cross talk for such small pixel sizes is by no means easy.…”

Section: Ar: Brightness and Efficiencymentioning

confidence: 99%

Augmented Reality and Virtual Reality Displays: Perspectives and Challenges

et al. 2020

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Summary As one of the most promising candidates for next-generation mobile platform, augmented reality (AR) and virtual reality (VR) have potential to revolutionize the ways we perceive and interact with various digital information. In the meantime, recent advances in display and optical technologies, together with the rapidly developing digital processers, offer new development directions to advancing the near-eye display systems further. In this perspective paper, we start by analyzing the optical requirements in near-eye displays poised by the human visual system and then compare it against the specifications of state-of-the-art devices, which reasonably shows the main challenges in near-eye displays at the present stage. Afterward, potential solutions to address these challenges in both AR and VR displays are presented case by case, including the most recent optical research and development, which are already or have the potential to be industrialized for extended reality displays.

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Section: Ar: Brightness and Efficiencymentioning

confidence: 99%

Augmented Reality and Virtual Reality Displays: Perspectives and Challenges

et al. 2020

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“…However, there is still a lack of a stable and narrow-band red down conversion layer, therefore, a hybrid backlight system is preferred [ 77 ]. In addition to careful thermal management, a tradeoff between life and brightness is also needed when High Dynamic Range(HDR) is required [ 78 ].…”

Section: Applications Of Mhp-ncsmentioning

confidence: 99%

The Stability of Metal Halide Perovskite Nanocrystals—A Key Issue for the Application on Quantum-Dot-Based Micro Light-Emitting Diodes Display

et al. 2020

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The metal halide perovskite nanocrystal (MHP-NC), an easy-to-fabricate and low cost fluorescent material, is recognized to be among the promising candidates of the color conversion material in the micro light-emitting diode (micro-LED) display, providing that the stability can be further enhanced. It is found that the water steam, oxygen, thermal radiation and light irradiation—four typical external factors in the ambient environment related to micro-LED display—can gradually alter and destroy the crystal lattice. Despite the similar phenomena of photoluminescence quenching, the respective encroaching processes related to these four factors are found to be different from one another. The encroaching mechanisms are collected and introduced in separate categories with respect to each external factor. Thereafter, a combined effect of these four factors in an environment mimicking real working conditions of micro-LED display are also introduced. Finally, recent progress on the full-color application of MHP-NC is also reviewed in brief.

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“…In recent years, flexible displays have attracted considerable attention because of the low weight, high mobility, and their portable, wearable, and even foldable applications [ 1 , 2 ]. Flexible active matrix organic light emitting diode (AMOLED) display is widely accepted as the most promising development trend for flexible displays technology, because they show low power consumption, faster response, and are more power efficient [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

High-Barrier Polyimide Containing Carbazole Moiety: Synthesis, Gas Barrier Properties, and Molecular Simulations

et al. 2020

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A high-barrier polyimide (2,7-CPI) was synthesized through the polymerization of pyromellitic dianhydride (PMDA) and a novel diamine (2,7-CDA) containing carbazole moiety. The synthesized diamine and polyimide were fully characterized by elemental analyses, FTIR and NMR. The 2,7-CPI displays very attractive barrier performances, with oxygen transmission rate (OTR) and water vapor transmission rate (WVTR) low to 0.14 cm3·m−2·day−1 and 0.05 g·m−2·day−1, respectively. Meanwhile, 2,7-CPI also exhibits exceptional thermal stability with a glass transition temperature (Tg) of 467 °C, 5% weight-loss temperature (Td5%) of 550 °C under N2 and coefficient of thermal expansion (CTE) of 3.4 ppm/K. The barrier performances of 2,7-CPI are compared with those of a structural analogue (2,7-CPPI) and a typical polyimide (Kapton). Their barrier performances with respect to microstructure were investigated by molecular simulations, wide angle X-ray diffraction (WAXD), and positron annihilation lifetime spectroscopy (PALS). The results show that 2,7-CPI possesses better coplanar structure and more number of intermolecular hydrogen bonds among the three PIs, which result in tight chain packing and thereby high crystallinity, low free volume, and decreased chains mobility. That is, the high crystallinity and low free volume of 2,7-CPI reduce the diffusion and solubility of gases. Meanwhile, the poor chains mobility further decreases the gases diffusion. The reduced diffusion and solubility of gases consequently promote the improvement of barrier properties for 2,7-CPI. The polyimide has a wide application prospect in the field of flexible electronic packaging industries.

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Mini-LED, Micro-LED and OLED displays: present status and future perspectives

Cited by 824 publications

References 108 publications

Augmented Reality and Virtual Reality Displays: Perspectives and Challenges

Augmented Reality and Virtual Reality Displays: Perspectives and Challenges

The Stability of Metal Halide Perovskite Nanocrystals—A Key Issue for the Application on Quantum-Dot-Based Micro Light-Emitting Diodes Display

High-Barrier Polyimide Containing Carbazole Moiety: Synthesis, Gas Barrier Properties, and Molecular Simulations

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