The Dynamic PhotoDetector (DPD) introduces a novel approach to light sensing, designed to enhance the capabilities of wearable devices. Traditional photodiodes measure light intensity via a constant reverse bias generating a photocurrent, often requiring amplification. In contrast, DPD operates by switching from reverse to forward bias, allowing light intensity to be inferred from delay time instead. This method reduces the need for analog amplification, significantly cutting down power consumption and noise, making it ideal for energy-efficient, long-lasting wearables like smartwatches and hearables.
DPD technology is engineered for high sensitivity, tuning it to detect even single photons, which is crucial for accurate biometric readings such as heart rate and activity monitoring. Operating at low voltages around 1V, it minimizes energy use—essential for battery-powered devices that must deliver reliable, continuous performance. This precision and efficiency make the DPD highly suitable for health-focused applications, where consistent and accurate data gathering is paramount.
The design also supports smart integration, using standard CMOS technology, making manufacturing processes simpler and cost-effective. Its compact size and high performance enhance device usability across various conditions, ensuring that wearables equipped with DPD technology provide an unparalleled user experience.
