Wearable Computing Systems: State‐of‐the‐Art and Research Challenges

Fortino, Giancarlo; Gravina, Raffaele

doi:10.1002/9781119863663.ch29

Cited by 1 publication

(1 citation statement)

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“…With the emergence of the internet of things, there is an increasing demand for interactive wearable display devices. − The popularity of devices like smartwatches and smart glasses continues enhance our interaction with the world. , Electroluminescent (EL) devices, as the foundation of wearable displays, have been a focus in recent decades. − Among these, alternative current electroluminescence|alternative current electroluminescent (ACEL) devices can avoid the charge accumulation caused by unidirectional current, leading the improvement on the power efficiency and operational lifetime. − Moreover, ACEL devices are less sensitive to size variations, which simplifies their application in flexible devices. ,, Numerous flexible displays based on the ACEL technology have been reported, demonstrating their potential in applications such as flexible displays and strain sensors. − …”

Section: Introductionmentioning

confidence: 99%

Low Driving Voltage Electroluminescence Device for Integrated Visual Strain Sensing

Zhu,

Xiong,

et al. 2024

ACS Appl. Mater. Interfaces

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As a pivotal component in human−machine interactions, display devices have undergone rapid development in modern life. Displays such as alternative current electro-luminescence|alternative current electroluminescent (ACEL) devices with high flexibility and long operational lifetimes are essential for wearable electronics. However, ACEL devices are constrained by their inherent high driving voltage and complex fabrication processes. Our work presents an easy blade-coating method for fabricating flexible ACEL display devices based on an all-solution process. By dispersing BaTiO 3 and ZnS/Cu powder into waterborne polyurethane, we successfully combined dielectric and fluorescence functionalities within a single layer, significantly reducing the device's driving voltage. Additionally, the ionic conducting hydrogel was chosen as a transparent electrode to achieve good electrical contact and strong interfacial adhesion through in situ polymerization. Owing to the unique method, our ACEL device exhibits high flexibility, low driving voltage (20−100 V), high brightness (300+ cd/m 2 at 60 V), and environmental friendliness. Furthermore, by repurposing the hydrogel electrode, we integrated strain visualization capabilities within a single device, highlighting its potential for applications such as wearable healthcare monitoring.

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