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Luminescent Nanomaterials: A Step Towards Solid-State Lighting and Display
Published in Odireleng Martin Ntwaeaborwa, Luminescent Nanomaterials, 2022
Mohan Lal Meena, Sudipta Som, Chung-Hsin Lu, Somrita Dutta, Rajan Kumar Singh, Shawn D. Lin
Recent development of displays devices including emissive and nonemissive displays draws significant requirement for the phosphors to produce visible light. The prerequisites for the phosphors in display devices should placate high quantum efficiency, reflectivity to visible light, longevity, and stability. Micro LED is deliberated to be the next generation display technology having extensive viewing angle, admirable contrast, low energy consumption, and nippy response time. For recent display technology morphology, particle size distribution (PSD), and zeta potential are the important physical requirements. However, the phosphors reported involve typically of micrometer-sized particles. The distended particles exhibit reduced packing density, which persuade high light-scattering effect. It results in inferior resolution. Moreover, comparatively large amount of materials are required [14]. To overcome this issue, nanoscopic phosphors with high packing density and low light-scattering ability comes into limelight [15]. LED surfaces with phosphors of large particle size can create large voids between crystals, triggering high light-scattering effects to diminute the resolution of LED. Luminescent Nanomaterials, a newly incipient arena at the edge of science, provide challenges to both fundamental research and breakthrough development of technologies in various areas such as electronics, photonics, nanotechnology, display, lasing, detection, optical amplification, fluorescent sensing to biomedical engineering, and environmental control.
Smart Textiles and Recent Developments
Published in Asis Patnaik, Sweta Patnaik, Fibres to Smart Textiles, 2019
Light is very important in smart clothing. Other than illuminating, it is possible to create clothing that charges electrical devices. Photovoltaic textiles that absorb light energy carry the potential to charge electrical devices (Overton 2018). MicroLED technology has been considered as the illumination technology for wearable smart textiles. MicroLEDs have the potential to serve in a more energy-efficient way to create flexible fabric displays when compared with LEDs and OLEDs (Overton 2018). Companies that invested in MicroLED technology include Apple (Lux Vue), Facebook (Oculus), Samsung and Song (eeNews Europe 2018).
Optimization of the optical structure of thin direct-lit LED backlights for LCD applications by using micro-LEDs
Published in Journal of Information Display, 2020
Form factor has become one of the most important aspects of modern displays. Thin, foldable, and flexible displays have attracted great attention of late and are beginning to appear in the market. The micro-light-emitting diode (micro-LED) is a small luminous element actively being developed for applications in various fields, such as wearable devices, automobiles, medical and bio-devices, and displays [1–3]. Micro-LEDs have been applied of late to large-size self-emitting displays. The micro-LED-based display has advantages, such as low power consumption, miniaturization, light weight, and flexibility. Micro-LED is a small LED with a 5–100 µm chip size, which can be used to realize a high-resolution display at a high-efficiency level [4–7].