With the continuous development of electronic technology and new breakthroughs in communication technologies such as cloud computing, Internet of Things (IoT) and 5G, digital health has experienced rapid expansion and adoption. Vital signs monitoring (VSM) functions have increasingly been built into mobile phones, watches, and other smart wearable devices, which are capable of measuring various vital signs and health indicators, such as body temperature, heart rate, respiration, blood oxygen saturation ( SpO2), blood pressure and body composition, etc. At the same time, due to excellent power consumption control and a more portable use experience, 24-hour continuous monitoring of the body is possible. The COVID-19 pandemic has also led to a demand for small and convenient health tracking devices (most The demand for smart wearable devices has reached new highs. There are huge challenges in adding multiple detection capabilities to small devices because it means smaller size, lower power consumption, and higher integration.
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