An overview on the principle of inkjet printing technique and its application in micro-display for augmented/virtual realities

Abstract

Augmented reality (AR) and virtual reality (VR) are two novel display technologies that are under updates. The essential feature of AR/VR is the full-color display that requires high pixel densities. To generate three-color pixels, the fluorescent color conversion layer inevitably includes green and red pixels. To fabricate such sort of display kits, inkjet printing is a promising way to position the color conversion layers. In this review article, the progress of AR/VR technologies is first reviewed, and in succession, the state of the art of inkjet printing, as well as two key issues -the optimization of ink and the reduction of coffee-ring effects, are introduced. Finally, some potential problems associated with the color converting layer are highlighted.

Effect of grain coalescence on dislocation and stress in GaN films grown on nanoscale patterned sapphire substrates

“…The stress in GaN films can be calculated from the shift of the peak position of GaN E 2 (H) phonons. Specifically, the relationship between the in-plane stress σ xx and E 2 (H) phonon frequency shift Δω in the GaN film can be expressed as: Δω = Kσ xx (5) where K is the stress coefficient typically taking a value of 2.56 cm −1 GPa −1 on the sapphire substrates. 52 Fig.…”

Application of Image Sensing System in Mineral/Rock Identification: Sensing Mode and Information Process

“…The LED display sends a different electronic signal to each pixel through a control system. [ 64 ] Each piece of LED array has a set of drive circuits. The column driver circuit has a latch or shift register to store signal data to be displayed.…”

Influence of the Volatility of Solvent on the Reproducibility of Droplet Formation in Pharmaceutical Inkjet Printing

“…Originally utilized for digital printing of (colored) inks for print media, DOD has emerged as a well-established tool in multiple fields. It is utilized in the fields of additive manufacturing (3D printing) [ 1 ], bioprinting [ 2 , 3 ], manufacturing of flexible (bio)sensors [ 4 , 5 ], high-throughput screening and micro arraying for biotechnological/pharmaceutical research [ 3 ] or even for display manufacturing [ 6 ], as some representative examples.…”